JP6805423B2 - Drainage device - Google Patents

Description

The present invention relates to a drainage device that stores / drains water in a tank by opening and closing a drainage port such as a bathtub or a washbasin.

The drainage device of this conventional example is used for a washbasin used for a washbasin, and is composed of a tank body, a drainage port, a drainage pipe, and a water-sealed drainage trap described below.
The tank body is a washbasin in this conventional example, and is composed of a box body that stores / drains a fluid such as water inside.
The drain port is a hole opened in the bottom surface of the tank body, and is an opening for discharging the water inside the tank body to the outside of the tank body. In this conventional example, the drainage port is connected to the drainage pipe described later, and the water in the tank is finally drained to the drainage pipe through the drainage port and the drainage pipe.
The drainage pipe is a pipe body connected to the drainage port, and connects from the drainage port to the sewage pipe. In addition, the sewage pipe is equipped with a water-sealed drain trap that stores part of the drainage in the middle and is provided to prevent pests and offensive odors from the sewage from flowing back into the room.
The water-sealed drain trap is provided with a water-sealing part inside by bending the pipe body in a substantially U-shape, and has an inlet, an outlet, a water-sealing lower limit wall, a water-sealing upper limit wall, an inflow leg, and an outflow leg. It is configured.
The water-sealing part is configured so that a part of the drainage is constantly stored so that pests and odors downstream do not flow back to the indoor side, and the water-sealing lower limit wall and the water-sealing upper limit wall described later are used. Part of the wastewater can be stored at all times. The vertical distance from the lower end of the water sealing lower limit wall to the upper end of the water sealing upper limit wall is the water sealing portion.
The inflow port is an inlet for the drainage from the drainage port to flow into the water sealing portion, and the drainage flowing in from the inflow port flows into the inflow leg described later.
The outflow outlet is an outlet for draining the drainage inside the water sealing part to the outside of the water sealing part, and the drainage from the outflow leg described later is drained to the outside of the water sealing part, that is, the outside of the water sealing type drain trap. It is an outlet for doing.
The water sealing lower limit wall is configured to hang down from the drainage port and constitutes the lower limit of the water sealing portion.
The water sealing upper limit wall is a wall that rises upward from the bottom of the water sealing portion, and constitutes the upper limit of the water sealing portion.
The inflow leg is a portion where the drainage of the water sealing portion flows in, and is a part from the upper end of the sealing water to the lowermost end of the water sealing lower limit wall.
The outflow leg is a part where the drainage of the water sealing portion flows out, and is a part from the water sealing lower limit wall to the uppermost end of the water sealing upper limit wall.
Since a drain pipe is connected to the lower end of the outlet of the water-sealed drain trap, the drainage in the water-sealed drain trap is drained to the drain pipe.
The drainage flow of the water-sealed drain trap is as follows. The drainage generated in the tank body is discharged from the drain port of the tank body to the drain pipe and flows into the drain pipe. The drainage in the drainage pipe flows into the water-sealed drainage trap connected to the drainage pipe. The drainage flows into the water-sealing portion of the water-sealing trap from the inflow port of the water-sealing trap, passes through the inflow leg, and passes through the lower space of the water-sealing lower limit wall. The drainage that has passed below the water sealing lower limit wall flows into the outflow leg and reaches the upper end of the water sealing upper limit wall. The drainage that reaches the upper end of the water sealing upper limit wall passes through the space above the water sealing upper limit wall, is discharged from the water sealing part, is drained from the outlet of the water sealing type drain trap to the drain pipe side, and is water sealed. It is drained to the outside of the type drain trap. The drainage discharged from the water-sealed drain trap flows to the drain pipe and is finally drained to the drain pipe.
(See Patent Document 1)

The drainage device of this conventional example is used for a washbasin used for a washbasin, and is composed of a tank body, a drainage port, a drainage pipe, and a self-sealing drainage trap described below.
The tank body is a washbasin in this conventional example, and is composed of a box body that stores / drains a fluid such as water inside.
The drain port is a hole opened in the bottom surface of the tank body, and is an opening for discharging the water inside the tank body to the outside of the tank body. In this conventional example, the drainage port is connected to the drainage pipe described later, and the water in the tank is finally drained to the drainage pipe through the drainage port and the drainage pipe.
The drainage pipe is a pipe body connected to the drainage port, and connects from the drainage port to the sewage pipe. In addition, the sewage pipe is equipped with a self-sealing drain trap that stores part of the drainage in the middle and is provided to prevent pests and offensive odors from the sewage from flowing back into the room.
The self-sealing drain trap is arranged in a series of drain pipes and constitutes an inlet, an outlet, a tubular body, and a water stop.
The inflow port is an opening for allowing the drainage flowing from the drainage pipe to flow into the self-sealing drainage trap. It is configured on the upper part of the tubular body described later.
The tubular body is a substantially cylindrical tubular body whose material is a soft material such as elastomer or rubber, and has an inflow port formed upstream and a water stop portion formed downstream.
The water stop portion is continuously formed on the downstream side of the tubular body so as to taper toward the tip end, and the tip ends are in contact with each other so as to open / close freely. When the drainage flows from the tubular body, the water stop portion opens due to the water pressure of the drainage, and when the drainage is exhausted, the water stop portion is restored by the elasticity of the water stop portion itself, and the water stop portions come into contact with each other. When the water stop portion comes into contact, the inside of the drain pipe is blocked, so that odors and pests from the sewer pipe are prevented from flowing back to the indoor side.
The outlet is an opening for discharging the drainage drained from the water stop portion from the inside of the self-sealing drain trap to the drain pipe outside, and is connected to the drain pipe.
The drainage flow of the self-sealing drain trap is as follows. The drainage generated in the tank body is discharged from the drain port of the tank body to the drain pipe and flows into the drain pipe. The drainage in the drainage pipe flows into the self-sealing drainage trap connected to the drainage pipe. The drainage flows into the tubular body of the self-sealing drain trap from the inflow port of the self-sealing trap, reaches the water-stopping part that is closed downstream of the tubular body, and the water pressure of the drainage causes the water-stopping part to come into contact. It is released and the water stop part opens. When the water stop is opened, the drainage passes through the water stop and is discharged from the outlet to the outside of the self-sealing drain trap. The drainage drained from the self-sealing drain trap is drained to the drainage pipe and finally to the drainage pipe.
(See Patent Document 2)

Real Kaihei 1-69870 JP-A-2010-126894

The conventional drainage device has the following problems.
Since the drainage device in Patent Document 1 uses a water-sealed drain trap, the height of the water-sealed portion (hereinafter referred to as "sealed depth") specified by the Building Standards Act is "50 mm or more". "Is required. When a water-sealing depth of 50 mm is required, the place where the water-sealed drain trap is placed becomes a storage space under a washbasin or a sink. Therefore, if a water-sealed drain trap having a water-sealing depth of 50 mm is arranged in this storage space, the storage space will take up a large space.
Another problem with water-sealed drain traps is water sealing loss. The main causes of the decrease in sealing loss include induced siphon action, self-siphon action, evaporation, and capillary action. Of these, the guided siphon action is caused by fluctuations in air pressure in the drainage pipe.
The inductive siphon action is an action in which the sealing water of the water sealing portion fluctuates in response to the fluctuation of the air pressure in the drainage pipe caused by the flow of the drainage, and the sealing water is lost. The problem to be solved by the present invention is to prevent the sealing by the induction siphon.
Further, among the water sealing losses, the state in which the water sealing surface of the water sealing portion is lower than the water sealing lower limit wall is called sealing. In the ruptured state, the water seal does not function, so that the odor and pests of the sewer pipe flow back into the room. Further, the description of "breaking" in the present invention refers to the one caused by the induction siphon.
Further, since the air pressure in the drain pipe is liable to fluctuate due to various factors as described above, the water-sealed drain trap easily causes a frequent rupture phenomenon.

Further, the drainage device in Patent Document 2 employs a self-sealing drainage trap.
The self-sealing drain trap is used in place of the water-sealed drain trap described above. However, when the self-sealing trap is used, the self-sealing trap can seal the water stop part by its own elasticity, so that water can be used. There is no need to use a sealed drain trap, and the self-sealing trap when there is no drain is stopped and sealed by the close contact of the water stop, but as mentioned above, the air pressure inside the drain pipe fluctuates drastically. Fluctuations in the air pressure inside the drain pipe also add to the self-sealing drain trap.
When the air pressure in the drain pipe is excessively applied (positive pressure state), or when the air pressure in the drain pipe is excessively sucked (negative pressure state), the self-sealing drain trap itself is made of soft rubber, elastomer, etc. Since it is composed of an elastic member, the water stop portion may be deformed and opened due to positive or negative pressure in the pipe. If the water stop part is deformed and opened in this way, in order for the shape to return to the self-sealing drain trap in the normal arrangement state, once drainage is generated and pressure is generated by the fluid, or in the drain pipe There is only a case where the air pressure becomes negative pressure or positive pressure and is drawn in. In this way, once the water stop portion is opened, the seal is broken during that time, so that the odor and pests of the sewer pipe flow back into the room.
In addition, the shape of the self-sealing drain trap may be deformed after many years of use. This is because the water stop part repeatedly opens and closes for a long period of time and a large number of times each time drainage is generated, so that the water stop part is deformed and does not come into contact or adhere well, and the water is stopped and sealed. In some cases, there was a slight gap (broken state). If a gap is generated in the water stop portion in this way, there is a problem that odors and pests from the sewage flow back to the indoor side.

From the above, the present invention solves the following problems.
1. 1. It does not generate gaps that occur in the water-stopping part of the valve body, such as minute gaps in the valve body that occur when manufacturing the valve body and gaps in the water-stopping part that are used over time.
2. 2. Prevents the water seal from breaking.
3. 3. It has the advantages of both a water seal and a valve body.
4. Unlike the water-sealed drain trap, the water-sealing depth of 50 mm is not required, and the space under the tank body can be widened. In addition, the height of the piping space under the tank body can be lowered.
5. Due to the difference in air pressure inside the drain pipe, the seal does not break.

The drainage device according to claim 1 has a drainage port 2 for flowing drainage into the drainage pipe 3 and a drainage pipe 3 which is connected to the drainage port 2 and drains the drainage from the drainage port 2 to the drainage pipe 3. And the water reservoir 41 provided inside, the lower limit wall 42 forming the lower limit wall of the sealing water, and the upper limit wall 43 forming the upper limit wall of the sealing water, which are arranged in the same system as the drainage pipe 3. A drainage device including a water sealing portion 4 that constitutes the drainage pipe and a valve body portion 6 that is arranged in the same system as the drainage pipe 3 and that constantly closes the in-pipe path and opens the in-pipe path when drainage occurs. In the above, a pressure adjusting chamber 5 is formed between the water sealing portion 4 and the valve body portion 6 so that the valve body portion 6 has an air pressure for blocking the in-pipe path, and the water sealing depth of the water sealing portion 4 is set to less than 50 mm. It is a drainage device characterized by this.

In the drainage device according to claim 2, the water reservoir 41 has a portion on the side where drainage flows in as an inflow leg 44 and a portion on the side where drainage flows out as an outflow leg 45, and the inflow leg 44 and the outflow leg 45. The drainage device according to paragraph 0008, wherein the leg cross-sectional area ratio is set to inflow leg 44: outflow leg 45 = about 1: 2.

The drainage device according to claim 3 is the drainage device according to paragraph 0008 or 0009, wherein the water sealing portion 4 is arranged upstream of the valve body portion 6 in the drainage device.

The drainage device according to claim 4 is the drainage device according to paragraph 00081 or paragraph 0009, wherein the water sealing portion 4 is arranged downstream of the valve body portion 6 in the drainage device.

The drainage device according to claim 5 , wherein the central axis of the valve body portion 6 is arranged so as to be substantially parallel to the central axis of the inflow leg 44 of the water sealing portion 4, according to paragraphs 0008 to 0011 . The drainage device according to any one.

The drainage device according to claim 6 is characterized in that the central axis of the valve body portion 6 is arranged so as to be substantially orthogonal to the central axis of the inflow leg 44 of the water sealing portion 4, according to paragraphs 0008 to 0011. The drainage device according to any one of the above.

In the drainage device according to claim 7 , the valve body portion 6 is continuously tapered from the tubular body 611 formed on the upstream side and into which the drainage flows, toward the downstream tip direction. 612. The drainage device according to any one of paragraphs 0008 to 0014, wherein the self-sealing drain trap 61 constitutes the water stop portion 612 formed in the above.

The drainage device according to claim 8 is configured such that the water sealing portion 4 has an opening downstream from the outflow leg 45 as an outflow port 8 so that the central axis of the outflow port 8 and the inflow leg 44 is not coaxial. The top surface of the upper limit wall 43 is the upper end surface 431, and the end portion of the upper end surface 431 facing the lower limit wall 42 and the outlet 8 of the upper end surface 431 are opposed to each other in a cross-sectional view along the horizontal direction at the end portion of the upper end surface 431. The drainage device according to any one of paragraphs 0008 to 0015 , wherein the length TL of the shortest distance to the end portion is configured to be longer than the maximum thickness of the outer peripheral wall of the water sealing portion 4. is there.

The drainage device according to claim 9 is configured such that the water sealing portion 4 has an opening downstream from the outflow leg 45 as an outflow port 8 and the central axis of the outflow port 8 and the outflow leg 45 is coaxial. ,
The top surface of the upper limit wall 43 is the upper end surface 431, and the end portion of the upper end surface 431 facing the lower limit wall 42 and the outlet 8 of the upper end surface 421 are opposed to each other in a cross-sectional view along the horizontal direction at the end portion of the upper end surface 431. The drainage device according to any one of paragraphs 0008 to 0015 , wherein the length TL of the shortest distance to the end portion is configured to be longer than the maximum thickness of the outer peripheral wall of the water sealing portion 4. is there.

According to the first aspect of the present invention, since the air pressure adjusting chamber 5 is formed between the water sealing portion 4 and the valve body portion 6 so that the valve body portion 6 blocks the path in the pipe, the inside of the drain pipe 3 is formed. Even if the air pressure in the pipe of the above pipe fluctuates, the air pressure in the space inside the air pressure adjusting chamber 5 can be set to the air pressure that closes the valve body portion 6, so that the valve body portion 6 opens. Since there is no air pressure, odors and pests from sewage do not flow back into the room.
In the present invention according to claim 2, the water reservoir 41 has a portion on the side where drainage flows in as an inflow leg 44 and a portion on the side where drainage flows out as an outflow leg 45, and the inflow leg 44 and the outflow leg 45. Since the leg cross-sectional area ratio was set to inflow leg 44: outflow leg 45 = about 1: 2, the air pressure applied to the leg cross-sectional area of the inflow leg 44 due to the negative pressure or positive pressure of the pressure adjustment chamber 5 and the outflow leg 45 When there is a difference in the air pressure applied to the leg cross-sectional area, the leg cross-sectional area of the outflow leg 45 is about twice the leg cross-sectional area of the inflow leg 44, so that the water level of the inflow leg 44 becomes lower than the water level of the outflow leg 45. However, the stored water in the water reservoir 41 is not significantly damaged.
In the present invention according to claim 3, since the water sealing portion 4 is arranged upstream from the valve body portion 6, the air pressure in the air pressure adjusting chamber 5 becomes a negative pressure. Therefore, the water stop portion 612 of the valve body portion 6 can be brought into close contact with the water stop portion 612 due to the negative pressure in the air pressure adjusting chamber 5 on the upstream side, and the water can be stopped and sealed.
In the present invention according to claim 4, since the water sealing portion 4 is arranged downstream from the valve body portion 6, the air pressure in the air pressure adjusting chamber 5 becomes a positive pressure. Therefore, the water stop portion 612 of the valve body portion 6 can be in close contact with the positive pressure in the air pressure adjusting chamber 5 on the downstream side, and the water can be stopped and sealed.
According to the first aspect of the present invention, since the sealing depth of the water sealing portion 4 is less than 50 mm, the size of the drainage device itself can be made more compact, and a larger storage space under the tank body 1 can be secured. Can be done. Further, since this drainage device is a drainage device in which the valve body portion 6 and the water sealing portion 4 are combined, the water sealing depth of the water sealing portion 4 can be set to less than 50 mm.
According to the fifth aspect of the present invention, since the central axis of the valve body portion 6 is arranged so as to be substantially parallel to the central axis of the inflow leg 44 of the water sealing portion 4, depending on the structure and shape of the valve body portion 6, Since the installation direction can be changed, there is a degree of freedom in the piping layout.
In the present invention according to claim 6 , since the central axis of the valve body portion 6 is arranged so as to be substantially orthogonal to the central axis of the inflow leg 44 of the water sealing portion 4, it depends on the structure and shape of the valve body portion 6. Since the installation direction can be changed, the piping layout can be freely arranged.
According to the seventh aspect of the present invention, the valve body portion 6 is continuously tapered from the tubular body 61, which is formed on the upstream side and into which drainage flows, toward the downstream tip direction. Since the self-sealing drain trap 61 is formed to form the water-stop portion 612, the air pressure in the air pressure adjusting chamber 5 is satisfactorily applied to the water-stop portion 612 of the self-sealing drain trap 61, which makes it stronger. In addition, the adhesion and water stoppage of the water stop portion 612 can be improved.
The present invention according to claim 8 is configured such that the water sealing portion 4 has an opening downstream from the outflow leg 45 as an outflow port 8 so that the central axis of the outflow port 8 and the inflow leg 44 is not coaxial. The top surface of the upper limit wall 43 is the upper end surface 431, and the end portion of the upper end surface 431 facing the lower limit wall 42 and the outlet 8 of the upper end surface 431 are opposed to each other in a cross-sectional view along the horizontal direction at the end portion of the upper end surface 431. Since the length TL of the shortest distance to the end portion is configured to be longer than the maximum thickness of the outer peripheral wall of the water sealing portion 4, a large upper end surface 431 of the upper limit wall 43 can be secured, so that the water sealing portion 4 is broken. Sealing can be effectively prevented .
The present invention according to claim 9 is configured such that the water sealing portion 4 has an opening downstream from the outflow leg 45 as an outflow port 8 and the central axis of the outflow port 8 and the outflow leg 45 is coaxial. The top surface of the upper limit wall 43 is the upper end surface 431, and the end portion of the upper end surface 431 facing the lower limit wall 42 and the outlet 8 of the upper end surface 421 are opposed to each other in a cross-sectional view along the horizontal direction at the end portion of the upper end surface 431. Since the length TL of the shortest distance to the end portion is configured to be longer than the maximum thickness of the outer peripheral wall of the water sealing portion 4, a large upper end surface 431 of the upper limit wall 43 can be secured, so that the water sealing portion 4 is broken. Sealing can be effectively prevented.

It is sectional drawing which shows 1st Example of this invention. FIG. 1 is a cross-sectional view taken along the line AA'in FIG. It is an enlarged cross-sectional view which shows the state which the valve body part of 1st Example is closed. The direction of the arrow indicates the direction of air pressure. It is sectional drawing which shows the state in which the drainage has passed and the valve body part opened in 1st Example. It is sectional drawing which shows the 2nd Example of this invention. It is an enlarged sectional view which shows the state which the valve body part of 2nd Example is closed. The direction of the arrow indicates the direction of air pressure. It is sectional drawing which shows the Example which arranged so that the central axis of a valve body part is arranged so that it may be substantially orthogonal to the inflow leg of a water seal part. FIG. 7 is a cross-sectional view taken along the line AA'in FIG. It is sectional drawing which shows the Example which adopted the valve body part of the check valve structure. It is sectional drawing which shows the Example which adopted the water-sealing part of the S trap structure. FIG. 10 is a cross-sectional view taken along the line AA'in FIG. It is sectional drawing which shows the Example which adopted the water seal part of the inverted one type trap structure. FIG. 12 is a cross-sectional view taken along the line AA'in FIG. It is sectional drawing which shows the Example which adopted the water seal part of the one type trap structure. FIG. 14 is a cross-sectional view taken along the line AA'in FIG.

The drainage device of this embodiment is used for a washbasin used for a washbasin, and is shown in FIGS. 1 to 4 and is also described below in a tank body 1, a drainage port 2, a drainage pipe 3, and a water seal. It is composed of a part 4, a valve body part 6, and a pressure adjusting chamber 5.
The tank body 1 is a wash bowl in this embodiment, and is composed of a box body that stores / drains a fluid such as water inside.
The drain port 2 is a hole opened in the bottom surface of the tank body 1 and is an opening for discharging the water inside the tank body 1 to the outside of the tank body 1. In this embodiment, the drainage port 2 is connected to the drainage pipe 3 described later, and the water in the tank body 1 is finally drained to the drainage pipe via the drainage port 2 and the drainage pipe 3.
The drainage pipe 3 is a pipe body connected to the drainage port 2, and connects the drainage port 2 to the sewage pipe. Further, a drainage device including a water sealing portion 4 and a valve body portion 6 provided to prevent pests and offensive odors from the sewage from flowing back to the indoor side is attached to the sewer pipe.

The water sealing portion 4 shown in FIGS. 1 and 2 constitutes a primary inflow port 71, a primary outlet 81, a lower limit wall 42, an upper limit wall 43, an inflow leg 44, an outflow leg 45, and a water reservoir portion 41. There is. Further, the first outlet and the central axis of the outflow leg 44 are configured not to be coaxial.
In all drawings, the portion indicated by hatching in the water reservoir portion 41 of the water sealing portion 4 indicates a portion where water is stored.
The primary inflow port 71 is an inlet for drainage from the drainage port 2 to flow into the water sealing portion 4, and the drainage flowing in from the primary inflow port 71 flows into the inflow leg 44 described later. To do. In this embodiment, it is a pipe body that hangs down from the tank body 1 drainage port 2.
The primary outlet 81 is an outlet for draining the drainage inside the water sealing portion 4 to the outside of the water sealing portion 4, and the drainage from the outflow leg 45 described later is outside the water reservoir 41, that is, the water sealing. This is an outlet 8 for draining water to the outside of the part 4. In this embodiment, it is a tubular body that is arranged downstream from the upper limit wall 43 described later and is configured to hang down. Further, an atmospheric pressure adjusting chamber 5 is arranged downstream of the primary outlet 81, and a valve body portion 6 is arranged downstream thereof.
The lower limit wall 42 is a wall formed by hanging from the drain port 2 into the water sealing portion 4, and constitutes the lower limit of the sealing depth of the water reservoir portion 41 described later. Further, in this embodiment, since the lower limit wall 42 is formed by hanging the pipe body from the drain port 2 as it is, the lower limit wall 42 is formed of a cylindrical wall.
The upper limit wall 43 is a wall that rises upward from the bottom of the water reservoir 41 of the water sealing portion 4, and constitutes the upper limit of the water reservoir 41 and the upper limit of the sealing depth. Further, an upper end surface 431 is formed on the top surface of the upper limit wall 43, and the drainage in the water sealing portion 4 passes over the upper end surface 431 and is discharged to the first outlet side. The wall thickness of the shortest distance TL of the portion of the upper end surface 431 facing the lower limit wall 42 and the shortest distance to the end of the upper end surface 431 facing the outlet 8 is shown in FIGS. 1 and 2. The TL distance shown. The distance of the TL shown in FIG. 1 is the water-sealed portion of the cut surface including the upper end surface 431 of the water-sealed portion 4 (A-A'cross-sectional view of FIG. 1, that is, FIG. 2) excluding the upper limit wall 43. It is configured to be longer than the maximum wall thickness of 4. With this configuration, the distance from the inner circumference of the upper limit wall 43 of the upper end surface 431 to the outflow port 8 can be made longer than that of the conventional drainage device, and by doing so, the inside of the water reservoir 41 is broken. Sealing can be prevented.
Further, the shortest distance WL between the surface of the lower limit wall 42 facing the upper limit wall 43 and the surface of the upper limit wall 43 facing the lower limit wall 42 is the distance of the WL shown in FIGS. 1 and 2. The distance of the WL shown in FIGS. 1 and 2 is longer than the maximum wall thickness of the water sealing portion 4 excluding the upper limit wall 43 of the cut surface including the upper end surface 431 of the water sealing portion 4. With this configuration, the distance from the lower limit wall 42 to the upper limit wall 43 can be made longer than that of the conventional drainage device, and by doing so, it is possible to prevent the inside of the water reservoir 41 from being ruptured. it can.
The inflow leg 44 is a portion where the drainage of the water sealing portion 4 flows in, and in this embodiment, it is a pipe body on the drain port 2 (apparatus) side in which the drainage flows into the water sealing portion 4. In this embodiment, as shown in FIG. 2, the leg cross-sectional area ratio of the inflow leg 44 and the outflow leg 45 is approximately inflow leg 1: outflow leg 2. The larger the leg cross-sectional area of the outflow leg 45 than the leg cross-sectional area of the inflow leg 44, the more effective the prevention of sealing.
The outflow leg 45 is a portion where the drainage of the water sealing portion 4 flows out, and is a portion from the lower limit wall 42 to the uppermost end of the upper limit wall 43.
In this embodiment, as shown in FIG. 2, the leg cross-sectional area ratio of the inflow leg 44 and the outflow leg 45 is approximately inflow leg 1: outflow leg 2.
The water reservoir 41 is provided with a water sealing depth in order to maintain the air pressure of the air pressure adjusting chamber 5 arranged downstream by constantly storing a part of the drainage. The sealing depth refers to a drainage portion that stores water from the lower end of the lower limit wall 42 to the upper end of the upper limit wall 43, or a vertical distance from the lower end of the lower limit wall 42 to the upper end of the upper limit wall 43. The drainage pipe 3 is blocked from the atmosphere on the drainage port 2 side by the sealing depth. Further, as for the water level in the water reservoir 41, the water level on the outflow leg 45 side exists up to the upper end of the upper limit wall 43, and the water level on the inflow leg 44 side is basically lower than the upper end of the upper limit wall 43. At the maximum, the water level is at the lowermost end of the lower limit wall 42. This is because the space of the atmospheric pressure adjusting chamber 5, which will be described later, has a negative pressure, so that the drainage in the water reservoir 41 is drawn downstream by the negative pressure.
In the present invention, as shown in FIG. 1, since the self-sealing drainage trap 61 as the valve body portion 6 is configured downstream, the water-sealing portion 4 functions as a so-called "water-sealing drainage trap". It is not a thing, but is provided to keep the air pressure in the air pressure adjusting chamber 5 constant.
Further, since the water sealing portion 4 arranges the valve body portion 6 described later as a drain trap function downstream, the drain pipe 3 is blocked from the atmospheric pressure even if the sealing depth (sealing function portion) is less than 50 mm. The purpose can be achieved. Therefore, since the sealing depth can be set low, the height of the water sealing portion 4 can be lowered, and the entire drainage device can be made compact.

The valve body portion 6 is arranged downstream of the water sealing portion 4. The valve body portion 6 constantly blocks the in-pipe path, but when drainage occurs in the in-pipe path, the in-pipe path is opened and the drainage from the drain port 2 is drained to the sewage, but the odor from the sewage It has a drain trap function to prevent backflow of insects and pests into the room.
Further, in this embodiment, a self-sealing drain trap 61 is used as the valve body portion 6 as shown in FIG.
The self-sealing drain trap 61 as the valve body portion 6 is composed of a secondary inflow port 72, a secondary outlet 82, a tubular body 611, and a water stop portion 612.
The central axis of the valve body portion 6 is arranged so as to be substantially parallel to the inflow leg 44 of the water sealing portion 4.
The secondary inflow port 72 is an opening for flowing drainage into the self-sealing drain trap 61, and is arranged downstream of the primary outlet 81 of the water sealing portion 4 via the air pressure adjusting chamber 5. To.
The tubular body 611 is a cylindrical member that is made of a soft elastic member such as rubber or elastomer and is connected to the secondary inflow port 72 and has an open upper portion.
The water stop portion 612 is configured to be continuous from the upper part of the cylinder so as to taper toward the tip on the downstream side, and the tip thereof abuts watertightly. When the drainage passes through, the water stop portion 612 opens due to its own elasticity and can pass water to the downstream side. When the drainage is completed, the water stop portion 612 is configured so that its tip is in watertight contact due to the restoring force due to its own elasticity.
The secondary outlet 82 is a drainage passage port generated when the water stop portion 612 is opened. A drainage pipe 3 is further connected downstream from the secondary outlet 82, and the drainage generated from the secondary outlet 82 is drained to the sewage.

The air pressure adjusting chamber 5 is a space arranged between the above-mentioned water sealing portion 4 and the self-sealing drain trap 61, and is configured to have a negative pressure at all times in this embodiment. Specifically, it is a closed space downstream from the water surface of the outflow leg 45 and separated from the inner peripheral surface of the tubular body 611 of the self-sealing drain trap 61 and the water stop portion 612.
The sealing of the space of the air pressure adjusting chamber 5 is achieved by sealing by the water reservoir 41 of the water sealing portion 4 and the water blocking portion 612 of the self-sealing drain trap 61 as the valve body portion 6.
Further, the negative pressure generation source in the air pressure adjusting chamber 5 is the air pressure adjusting chamber 5 due to air suction from the downstream side generated when the drainage flows into the water sealing portion 4 and flows into the downstream self-sealing drain trap 61 portion. When the inside becomes negative pressure and drainage is completed, the water stop part 612 of the self-sealing drain trap 61 closes, and if the water sealing depth of the water reservoir 41 of the water sealing part 4 occurs, the inside of the air pressure adjustment chamber 5 remains negative pressure. Be maintained. At this time, as shown in FIG. 1, the water level of the water reservoir 41 flows in by the amount that the water level on the outflow leg 45 side is lifted by the negative pressure in the air pressure adjustment chamber 5 and the water level rises and the water level of the outflow leg 45 is raised. The water level on the leg 44 side becomes low.
Further, due to the negative pressure in the air pressure adjusting chamber 5, the negative pressure is satisfactorily applied to the upstream surface of the self-sealing drain trap 61 made of a soft elastic member arranged downstream, and the water stop portion of the self-sealing drain trap 61 is also applied. The 612s come into contact with each other more firmly. Even if the restoring force of the water stop portion 612 is weakened due to aged deterioration or the like and the adhesion of the water stop portion 612 is weak, as shown in FIG. 3, the negative pressure in the pressure adjusting chamber 5 causes self-sealing drainage. The water blocking portions 612 of the trap 61 can be brought into close contact with each other in the direction of the arrow in FIG.

The drainage flow of the above drainage device is as follows. The drainage generated in the tank body 1 is discharged from the drainage port 2 of the tank body 1 to the drainage pipe 3 and flows into the drainage pipe 3. The drainage in the drainage pipe 3 flows into the water sealing portion 4 connected to the drainage pipe 3.
As shown in FIG. 4, the drainage flows into the water reservoir 41 of the water seal 4 from the primary inflow port 71 of the water seal 4, passes through the inflow leg 44, and passes through the lower space of the lower limit wall 42. pass. The drainage that has passed below the lower limit wall 42 flows into the outflow leg 45 and reaches the upper end of the upper limit wall 43. The drainage that has reached the upper end of the upper limit wall 43 passes through the space on the upper end surface 431 which is the top surface of the upper limit wall 43, is discharged from the water reservoir 41, and adjusts the air pressure from the primary outlet 81 of the water sealing portion 4. Water is passed through the chamber 5 and drained to the outside of the water seal portion 4.
The drainage that has flowed into the atmospheric pressure adjusting chamber 5 is drained to the secondary inflow port 72. At this time, the inside of the atmospheric pressure adjusting chamber 5 has a negative pressure due to the flow of drainage.
The drainage drained into the secondary inflow port 72 passes through the inner circumference of the tubular body 611 of the self-sealing drain trap 61, which is a valve body, and reaches the tapered water stop portion 612, as shown in FIG. The water stop portion 612 is opened by water pressure. When the water stop portion 612 is opened, the drainage is drained to the outside of the self-sealing drain trap 61 from the secondary outlet 82 composed of the opened water stop portion 612. The drainage drained from the secondary outlet 82 passes through the drainage pipe 3 and is finally drained to the sewer pipe.
The term "arranged in the same system as the drainage pipe 3" means that the pipe is installed in the same drainage system.
When the drainage from the drainage port 2 is completed, the overflowing water from the upper limit wall 43 in the water reservoir 41 is finished, and the water stop portion 612 of the self-sealing drainage trap 61 is closed. At this time, since the space inside the air pressure adjusting chamber 5 has a negative pressure, it is satisfactorily applied to the inner peripheral surface of the self-sealing drain trap 61 and the water stop portion 612. This is the pressure applied so that the self-sealing drain trap 61 itself is pulled up or sucked up toward the air pressure adjusting chamber 5 as shown in the direction of the arrow in FIG. Therefore, the water stop portion 612 of the self-sealing drain trap 61 can be strongly contacted without a gap. Then, at the same time that the water stop portion 612 of the self-sealing drain trap 61 comes into contact with the water stop portion 612, the water level of the water reservoir 41 of the water seal portion 4 becomes stable. At this time, as shown in FIG. 1, the water level on the outflow leg 45 side is located at the upper end of the upper limit wall 43, and the water level on the inflow leg 44 side is located at the lower end of the lower limit wall 42. That is, a water level difference occurs between the inflow leg 44 and the outflow leg 45 side. This occurs because the air pressure in the pressure adjusting chamber 5 on the outflow leg 45 side is negative, and the air pressure applied to the inflow leg 44 side is atmospheric pressure. Even if the water level difference occurs and the sealing depth is shallow, the water stop portion 612 of the self-sealing drain trap 61 arranged downstream is tightly adhered and closed, so that the sealing occurs. There is no.
Since the water stop portion 612 of the self-sealing drain trap 61 is in close contact with the water stop portion 612, the inside of the drain pipe 3 can be closed, the function as a drain trap is fulfilled, and the drainage is completed.
Further, the negative pressure on the downstream side of the second outlet 82 of the self-sealing drain trap 61 is eliminated by ventilation from the sewage side after the drainage is completed, and only the internal space of the air pressure adjustment chamber 5 is upstream or downstream of the drainage trap 61. On the other hand, the pressure is negative.
Further, even if an induction siphon is generated in the drain pipe 3 downstream from the secondary outlet 82 and the air pressure in the pipe fluctuates, the water stop portion 612 is opened because the air pressure is kept constant in the air pressure adjusting chamber 5. There is no such thing as rupture or water loss phenomenon that occurred in water-sealed drain traps.

The drainage device of this embodiment is used for a washbasin used for a washbasin, and is shown in FIGS. 5 to 6 and described below, including a tank body 1, a drainage port 2, a drainage pipe 3, and a valve body. It is composed of a part 6, a water sealing part 4, and a pressure adjusting chamber 5.
The tank body 1 is a wash bowl in this embodiment, and is composed of a box body that stores / drains a fluid such as water inside.
The drain port 2 is a hole opened in the bottom surface of the tank body 1 and is an opening for discharging the water inside the tank body 1 to the outside of the tank body 1. In this embodiment, the drainage port 2 is connected to the drainage pipe 3 described later, and the water in the tank body 1 is finally drained to the drainage pipe via the drainage port 2 and the drainage pipe 3.
The drainage pipe 3 is a pipe body connected to the drainage port 2, and connects the drainage port 2 to the sewage pipe. Further, the sewer pipe is attached with a drainage device including a water sealing portion 4 and a valve body portion 6 provided so as to prevent pests and offensive odors from the sewage from flowing back to the indoor side.

Since the valve body portion 6 is piped to the drain pipe 3 from the drain port 2, it is arranged downstream of the water sealing portion 4. The valve body portion 6 constantly blocks the in-pipe path, but when drainage occurs in the in-pipe path, the in-pipe path is opened and the drainage from the drain port 2 is drained to the sewage, but the odor from the sewage It has a drain trap function to prevent backflow of insects and pests into the room.
Further, in this embodiment, a self-sealing drain trap 61 is used as the valve body portion 6 as shown in FIGS. 5 and 6.
Further, the central axis of the valve body portion 6 is arranged so as to be substantially parallel to the inflow leg 44 of the water sealing portion 4.
The self-sealing drain trap 61 as the valve body portion 6 is composed of a primary inflow port 71, a primary outlet 81, a tubular body 611, and a water stop portion 612.
The primary inflow port 71 is an opening for flowing drainage into the self-sealing drain trap 61, and is arranged downstream of the drain pipe 3 that hangs down from the drain port 2.
The tubular body 611 is a cylindrical member that is made of a soft elastic member such as rubber or elastomer and is connected to the primary inflow port 71 and has an open upper portion.
The water stop portion 612 is configured to be continuous from the upper part of the cylinder so as to taper toward the tip on the downstream side, and the tip thereof abuts watertightly. When the drainage passes through, the water stop portion 612 opens due to its own elasticity and can pass water to the downstream side. When the drainage is completed, the water stop portion 612 is configured so that its tip is in watertight contact due to the restoring force due to its own elasticity.
The primary outlet 81 is a drainage passage port generated when the water stop portion 612 is opened. A drainage pipe 3 is further connected downstream from the primary outlet 81, and the drainage generated from the primary outlet 81 is drained to a water sealing portion 4 arranged further downstream of the drainage pipe 3. The Rukoto.

As shown in FIG. 5, the water sealing portion 4 constitutes a secondary inflow port 72, a secondary outlet 82, a lower limit wall 42, an upper limit wall 43, an inflow leg 44, an outflow leg 45, and a water reservoir portion 41. There is. Further, the central axes of the secondary outlet 82 and the inflow leg 44 are not coaxial with each other.
The secondary inflow port 72 is an inlet for drainage from the primary outflow port 81 of the self-sealing drain trap 61 to flow into the water sealing portion 4 via the air pressure adjusting chamber 5 described later. The drainage flowing from the secondary inflow port 72 flows into the inflow leg 44 described later. In this embodiment, it is a pipe body formed by piping from a self-sealing drain trap 61.
The secondary outlet 82 is an outlet for draining the drainage inside the water sealing portion 4 to the outside of the water sealing portion 4, and the drainage from the outflow leg 45 described later is outside the water sealing portion 41, that is, the water sealing. This is an outlet 8 for draining water to the outside of the part 4. In this embodiment, it is a tubular body that is arranged downstream from the upper limit wall 43 described later and is configured to hang down. Further, a drainage pipe 3 is connected to the secondary outlet 82, and the drainage pipe 3 is finally drained to the sewer pipe.
The lower limit wall 42 is a wall formed by hanging from the secondary inflow port 72 into the water sealing portion 4, and constitutes the lower limit of the sealing depth of the water reservoir portion 41 described later. Further, in this embodiment, since the lower limit wall 42 is formed by hanging the pipe body from the secondary inflow port 72 as it is, the lower limit wall 42 is formed of a cylindrical wall.
The upper limit wall 43 is a wall that rises upward from the bottom of the water reservoir 41 of the water sealing portion 4, and constitutes the upper limit of the water reservoir 41 and the upper limit of the sealing depth. Further, an upper end surface 431 is formed on the top surface of the upper limit wall 43, and the drainage in the water sealing portion 4 passes over the upper end surface 431 and is discharged to the secondary outlet 82 side. ..
The inflow leg 44 is a portion where the drainage of the water sealing portion 4 flows in, and in this embodiment, it is a pipe body on the side of the secondary inflow port 72 where the drainage flows into the water sealing portion 4. In this embodiment, the leg cross-sectional area ratio of the inflow leg 44 and the outflow leg 45 is approximately inflow leg 1: outflow leg 2. The larger the leg cross-sectional area of the outflow leg 45 than the leg cross-sectional area of the inflow leg 44, the more effective the prevention of sealing.
The outflow leg 45 is a portion where the drainage of the water sealing portion 4 flows out, and is a portion from the lower limit wall 42 to the uppermost end of the upper limit wall 43. In this embodiment, the leg cross-sectional area ratio of the inflow leg 44 and the outflow leg 45 is approximately inflow leg 1: outflow leg 2.
The water reservoir 41 is provided with a water sealing depth in order to maintain the air pressure of the air pressure adjusting chamber 5 arranged upstream by constantly storing a part of the drainage. The sealing depth refers to a drainage portion that stores water from the lower end of the lower limit wall 42 to the upper end of the upper limit wall 43, or a vertical distance from the lower end of the lower limit wall 42 to the upper end of the upper limit wall 43. The air on the downstream drain pipe 3 side is blocked by the sealing depth. As for the water level in the water reservoir 41, when the drainage is completed and the upstream water stop portion 612 is closed, the air from the water stop portion 612 to the upper surface of the water level of the inflow leg 44 in the water reservoir 41 is blocked because there is no escape route. Will be done. At this time, the water level on the outflow leg 45 side is located at the upper end of the upper limit wall 43, but due to the atmospheric pressure applied to the water surface of the outflow leg 45, the water in the water reservoir 41 tends to return toward the inflow leg 44 side. Works to make the water level on the inflow leg 44 side equal to the water level on the outflow leg 45 side. However, since the air in the air pressure adjusting chamber 5 is sealed due to the water stop portion 612 of the valve body portion 6 being closed and there is no escape route, the air pressure adjusting chamber 5 is pushed up by the amount of the water level of the inflow leg 44 being pushed up. The air pressure inside becomes positive pressure. Further, as shown in FIG. 5, the water level on the outflow leg 45 side is lowered by the amount pushed up to the inflow leg 44 side. Therefore, the water level on the outflow leg 45 side is higher than the water level on the inflow leg 44.
In the present invention, as shown in FIG. 5, since the self-sealing drainage trap 61 as the valve body portion 6 is configured upstream, the water-sealing portion 4 functions as a so-called “water-sealing drainage trap”. It is not a thing, but is provided to keep the air pressure in the air pressure adjusting chamber 5 constant.
Further, since the water sealing portion 4 arranges the valve body portion 6 as a drain trap function upstream, the purpose of closing from the drain pipe 3 on the sewage side can be achieved even if the sealing depth (sealing depth portion) is less than 50 mm. Therefore, since the sealing depth can be set low, the height of the water sealing portion 4 can be lowered, and the entire drainage device can be made compact.

The air pressure adjusting chamber 5 is a space arranged between the self-sealing drain trap 61 and the water sealing portion 4 described above, and is configured to have a positive pressure at all times in this embodiment. Specifically, it is a closed space that is downstream from the inner peripheral surface of the tubular body 611 of the self-sealing drain trap 61 and the water stop portion 612 and is separated to the water surface of the inflow leg 44.
The space of the air pressure adjusting chamber 5 is sealed by the water stop portion 612 of the self-sealing water distribution trap as the valve body portion 6 and the water reservoir portion 41 of the water sealing portion 4.
The sources of positive pressure in the atmospheric pressure adjusting chamber 5 are as follows. As shown in FIG. 5, when the drainage is completed and the upstream water stop portion 612 is closed, the air from the water stop portion 612 to the upper surface of the water level of the inflow leg 44 is cut off in the water reservoir 41 because there is no escape route. At this time, the water level on the outflow leg 45 side is located at the upper end of the upper limit wall 43, but due to the atmospheric pressure applied to the water surface of the outflow leg 45, the water in the water reservoir 41 tends to return toward the inflow leg 44 side. Works to make the water level on the inflow leg 44 side equal to the water level on the outflow leg 45 side. However, since the air in the air pressure adjusting chamber 5 is sealed due to the water stop portion 612 of the valve body portion 6 being closed and there is no escape route, the air pressure adjusting chamber 5 is pushed up by the amount of the water level of the inflow leg 44 being pushed up. The air pressure inside becomes positive pressure. Further, the water level on the outflow leg 45 side is lowered by the amount pushed up to the inflow leg 44 side. Therefore, as shown in FIG. 5, the water level on the outflow leg 45 side is higher than the water level on the inflow leg 44. In this way, the air pressure in the air pressure adjusting chamber 5 becomes a positive pressure.
Further, due to the positive pressure in the air pressure adjusting chamber 5, the positive pressure is satisfactorily applied to the downstream surface of the self-sealing drain trap 61 made of a soft elastic member arranged upstream, and the water stop portion of the self-sealing drain trap 61. The 612s come into contact with each other more firmly. Even if the restoring force of the water stop portion 612 is weakened due to deterioration over time and the water stop portion 612 is not in close contact with the water stop portion 612, self-sealing drainage is performed by the positive pressure in the air pressure adjustment chamber 5 as shown in FIG. The water blocking portions 612 of the trap 61 can be brought into close contact with each other.

The drainage flow of the above drainage device is as follows. The drainage generated in the tank body 1 is discharged from the drainage port 2 of the tank body 1 to the drainage pipe 3 and flows into the drainage pipe 3. The drainage in the drainage pipe 3 flows into the primary inflow port 71 connected to the drainage pipe 3.
The drainage passes from the primary inflow port 71 of the self-sealing drain trap 61, which is the valve body portion 6, through the inner circumference of the tubular body 611 of the self-sealing drain trap 61, reaches the tapered water stop portion 612, and drains the drainage. The water stop portion 612 is opened by water pressure. When the water stop portion 612 is opened, the drainage is drained to the outside of the self-sealing drain trap 61 from the primary outlet 81 composed of the opened water stop portion 612. The drainage drained from the primary outlet 81 flows into the atmospheric pressure adjusting chamber 5.
The drainage that has flowed into the air pressure adjusting chamber 5 is drained to the secondary inflow port 72, flows into the water reservoir 41 of the water sealing portion 4, passes through the inflow leg 44, and passes through the lower space of the lower limit wall 42. pass. The drainage that has passed below the lower limit wall 42 flows into the outflow leg 45 and reaches the upper end of the upper limit wall 43. The drainage that has reached the upper end of the upper limit wall 43 passes through the space on the upper end surface 431 which is the top surface of the upper limit wall 43, is discharged from the water reservoir 41, and is water-sealed from the secondary outlet 82 of the water-sealing part 4. It is drained to the outside of the part 4. The drainage drained from the secondary outlet 82 passes through the drainage pipe 3 and is finally drained to the sewer pipe. The term "arranged in the same system as the drainage pipe 3" means that the pipe is installed in the same drainage system.
Further, when the drainage from the drain port 2 is completed, the water stop portion 612 of the self-sealing drain trap 61 first comes into contact with the water stop portion 612. When the water stop portion 612 comes into contact with the water stop portion 612, the inflow of air from the drain port 2 into the air pressure adjustment chamber 5 is blocked, and the water reservoir 41 of the water seal portion 4 arranged downstream of the air pressure adjustment chamber 5 also downstream It is blocked. When the drainage is completed and the upstream water stop portion 612 is closed, the air from the water stop portion 612 to the upper surface of the water level of the inflow leg 44 is cut off in the water reservoir 41 because there is no escape route. At this time, the water level on the outflow leg 45 side is located at the upper end of the upper limit wall 43, but due to the atmospheric pressure applied to the water surface of the outflow leg 45, the water in the water reservoir 41 tends to return toward the inflow leg 44 side. Works to make the water level on the inflow leg 44 side equal to the water level on the outflow leg 45 side. However, since the air in the air pressure adjusting chamber 5 is sealed due to the water stop portion 612 of the valve body portion 6 being closed and there is no escape route, the air pressure adjusting chamber 5 is pushed up by the amount of the water level of the inflow leg 44 being pushed up. The air pressure inside becomes positive pressure. Further, the water level on the outflow leg 45 side is lowered by the amount pushed up to the inflow leg 44 side. Therefore, as shown in FIG. 5, the water level on the outflow leg 45 side is higher than the water level on the inflow leg 44. Then, the atmospheric pressure in the atmospheric pressure adjusting chamber 5 becomes a positive pressure. At this time, since the pressure in the space of the air pressure adjusting chamber 5 is positive, the pressure is satisfactorily applied to the outer peripheral surface (downstream side surface) of the self-sealing drain trap 61 and the water stop portion 612. This is the pressure applied so that the self-sealing drain trap 61 itself is pushed up toward the drain port 2 as shown in the direction of the arrow in FIG. Therefore, the water stop portion 612 of the self-sealing drain trap 61 can be strongly contacted without a gap. Since the water stop portion 612 of the self-sealing drain trap 61 is in close contact with the water stop portion 612, the inside of the drain pipe 3 can be closed, the function as a drain trap is fulfilled, and the drainage is completed.
Further, even if an induction siphon is generated in the drain pipe 3 downstream from the secondary outlet 82 and the air pressure in the pipe fluctuates, the air pressure is kept constant in the air pressure adjusting chamber 5, so that the water seal portion 4 No water sealing loss will occur, and the sealing and water sealing loss phenomena that occur in conventional water-sealing drain traps will not occur.

In addition to the above-described examples, the present invention can be appropriately modified without exceeding the scope of claims.
As shown in FIGS. 7 and 8, in the drainage device in which the air pressure adjusting chamber 5 is arranged between the water sealing portion 4 and the valve body portion 6, the central axis of the valve body portion 6 is the inflow leg of the water sealing portion 4. It may be arranged so as to be substantially orthogonal to 44. As described above, the arrangement direction of the valve body portion 6 can be changed depending on the shape and structure of the valve body portion 6, or can be appropriately changed depending on the piping layout.

As shown in FIG. 9, as the valve body portion 6, a valve body portion 6 having a structure other than the self-sealing drain trap 61 shown in the above embodiment may be used. The valve body 6 structure at this time is a valve structure that always closes the inside of the drainage pipe path, but opens the drainage pipe 3 inner path when drainage occurs.
In the other embodiment shown in FIG. 9, the central axis of the valve body portion 6 is arranged so as to be substantially orthogonal to the central axis of the inflow leg 44 of the water sealing portion 4. Further, the valve body portion 6 has a so-called check valve structure in which a disk-shaped water stop portion 612 is attached by a shaft having a hinge as a fulcrum, and the water stop portion 612 rotates with the hinge as a fulcrum. Valve body portion 6 is adopted. In this embodiment, the air pressure adjusting chamber 5 is arranged downstream of the valve body portion 6, and since the inside of the atmospheric pressure adjusting chamber 5 is constantly adjusted to a positive pressure, the water stop portion 612 is always a valve due to the positive pressure. It is pressed in the direction of sitting on the seat. By pressing with positive pressure, the water stop portion 612 can come into contact with the valve seat without a gap, and the water can be completely stopped and adhered. Therefore, the inside of the drain pipe 3 can be closed at all times. Further, when drainage is generated, the water stop portion 612 rotates with the hinge as a fulcrum due to the water pressure of the drainage to open the drainage pipe path, and the drainage can be drained downstream.
Further, in the embodiment shown in FIG. 9, the valve body portion 6 is arranged upstream from the water sealing portion 4, but the valve body portion 6 may be arranged downstream from the water sealing portion 4. In this case, the inside of the air pressure adjustment chamber 5 becomes a negative pressure, and the water stop portion 612 of the valve body portion 6 arranged downstream from the air pressure adjustment chamber 5 always closes in the closing direction due to the negative pressure of the air pressure adjustment chamber 5. A pulling force (suction) is applied to. Therefore, the water stop portion 612 can be pulled up by the force of the negative pressure and come into contact with the valve seat without a gap, so that the water stop portion 612 can be completely stopped and adhered. Therefore, the inside of the drain pipe 3 can be closed at all times. Further, when drainage is generated, the water stop portion 612 rotates with the hinge as a fulcrum due to the water pressure of the drainage to open the drainage pipe path, and the drainage can be drained downstream.
When the hinged or rotary valve body 6 is used as a drain trap for the drain pipe 3, a weight, a spring, or electricity is separately used to form the normally closed valve body 6. The valve body portion 6 had to be closed at all times by using a magnet or a magnet, which made the device large-scale, required electricity bills and regular maintenance, but in the present invention, electrical control is also unnecessary. , No need for regular maintenance. Therefore, there is a cost merit that no electricity bill is required, and further, the device does not become large-scale and has a space-saving and simple structure, which is very advantageous for the user.

As shown in FIGS. 10 and 11, the water sealing portion 4 may have a structure other than the so-called partition wall trap shape shown in the above embodiment. The water sealing portion 4 at this time may have a structure having a water sealing depth having a sealing function by water sealing.
In the other embodiment shown in FIG. 10, the water sealing portion 4 has a so-called S trap shape in which the pipe body is bent in a substantially U shape. In the embodiment, the S trap as the water sealing portion 4 is configured on the upstream side, and the valve body portion 6 is configured downstream from the water sealing portion 4 via the air pressure adjusting chamber 5. The valve body portion 6 in this embodiment uses a self-sealing drain trap 61.
In the water sealing portion 4 in this embodiment, the upper limit wall 43 and the lower limit wall 42 are formed by the walls inside the pipe body by bending the pipe body in a U shape. Further, an upper end surface 431 is formed on the top surface of the upper limit wall 43, and the drainage in the water sealing portion 4 passes over the upper end surface 431 and is discharged to the first outlet side. The wall thickness of the shortest distance TL of the portion of the upper end surface 431 facing the lower limit wall 42 and the shortest distance to the end of the upper end surface 431 facing the outlet 8 is shown in FIGS. It is the distance of TL shown by 11. Then, the distance of the TL shown in FIGS. 10 and 11 excludes the upper limit wall 43 of the cut surface (A-A'cross-sectional view of FIG. 10, that is, FIG. 11) including the upper end surface 431 of the water sealing portion 4. It is configured to be longer than the maximum wall thickness of the water seal portion 4. With this configuration, the distance from the inner circumference of the upper limit wall 43 of the upper end surface 431 to the outflow port 8 can be made longer than that of the conventional drainage device, and by doing so, the inside of the water reservoir 41 is broken. Sealing can be prevented.
Further, the shortest distance WL between the surface of the lower limit wall 42 facing the upper limit wall 43 and the surface of the upper limit wall 43 facing the lower limit wall 42 is the distance of the WL shown in FIGS. 10 and 11. The distance of the WL shown in FIGS. 10 and 11 is longer than the maximum wall thickness of the water sealing portion 4 excluding the upper limit wall 43 of the cut surface including the upper end surface 431 of the water sealing portion 4. With this configuration, the distance from the lower limit wall 42 to the upper limit wall 43 can be made longer than that of the conventional drainage device, and by doing so, it is possible to prevent the inside of the water reservoir 41 from being ruptured. it can.
The inflow leg 44 is a portion where the drainage of the water sealing portion 4 flows in, and in this embodiment, it is a pipe body on the drain port 2 (apparatus) side in which the drainage flows into the water sealing portion 4. In this embodiment, as shown in FIG. 11, the leg cross-sectional area ratio of the inflow leg 44 and the outflow leg 45 is inflow leg 1: outflow leg 2. The larger the leg cross-sectional area of the outflow leg 45 than the leg cross-sectional area of the inflow leg 44, the more effective the prevention of sealing.
The outflow leg 45 is a portion where the drainage of the water sealing portion 4 flows out, and is a portion from the lower limit wall 42 to the uppermost end of the upper limit wall 43.
In this embodiment, as shown in FIG. 11, the leg cross-sectional area ratio of the inflow leg 44 and the outflow leg 45 is set to inflow leg 1: outflow leg 2.
As described above, even in the S trap-shaped water sealing portion 4 in which the pipe body is bent, the sealing can be effectively prevented.

As shown in FIGS. 12 and 13, the water-sealing portion 4 may have a structure other than the so-called partition wall trap shape shown in the above embodiment. The water sealing portion 4 at this time may have a structure having a water sealing depth having a sealing function by water sealing.
In the other embodiments shown in FIGS. 12 and 13, a so-called inverted one-type trap shape using a cylindrical deodorant pipe to which the water seal portion 4 can be attached to the lower limit wall 42 detachably from the drain port 2 can be attached. It is said. In the embodiment, a reverse one-type drain trap as a water sealing portion 4 is formed on the upstream side, and a valve body portion 6 is configured downstream from the water sealing portion 4 via a pressure adjusting chamber 5. The valve body portion 6 in this embodiment uses a self-sealing drain trap 61, and the central axis of the valve body portion 6 is substantially orthogonal to the central axis of the inflow leg 44 of the water sealing portion 4. It is arranged like this. In this way, since the central axis of the self-sealing drain trap 61 is arranged in a substantially horizontal direction, the water stop portion 612 is the lower end of the outlet 8 so that drainage that accumulates meaninglessly does not occur in the drainage flow path in the pipe. It is configured to follow.
In the water sealing portion 4 in this embodiment, the lower limit wall 42 is a cylindrical deodorant pipe that can be detachably attached from the drain port 2, and the upper limit wall 43 is a partition wall that is formed upward from the lower end of the water reservoir 41. It has a so-called inverted one-type trap shape in which the sealing depth is formed by the cooperation of the lower limit wall 42 and the upper limit wall 43. Further, as shown in FIG. 13, the inflow leg 44 is arranged so as to be eccentric from the center of the water sealing portion 4. Further, the central axes of the outflow port 8 and the inflow leg 44 are not coaxial.
Further, an upper end surface 431 is formed on the top surface of the upper limit wall 43, and the drainage in the water sealing portion 4 passes over the upper end surface 431 and is discharged to the first outlet side. The wall thickness of the shortest distance TL of the portion of the upper end surface 431 facing the lower limit wall 42 and the shortest distance to the end of the upper end surface 431 facing the outlet 8 is shown in FIGS. It is the distance of TL shown by 13. Then, the distance of the TL shown in FIGS. 12 and 13 excludes the upper limit wall 43 of the cut surface including the upper end surface 431 of the water sealing portion 4 (A-A'cross-sectional view of FIG. 12, that is, FIG. 13). It is configured to be longer than the maximum wall thickness of the water seal portion 4. With this configuration, the distance from the inner circumference of the upper limit wall 43 of the upper end surface 431 to the outflow port 8 can be made longer than that of the conventional drainage device, and by doing so, the inside of the water reservoir 41 is broken. Sealing can be prevented.
Further, the shortest distance WL between the surface of the lower limit wall 42 facing the upper limit wall 43 and the surface of the upper limit wall 43 facing the lower limit wall 42 is the distance of the WL shown in FIGS. 12 and 13. The distance of the WL shown in FIGS. 12 and 13 is longer than the maximum wall thickness of the water sealing portion 4 excluding the upper limit wall 43 of the cut surface including the upper end surface 431 of the water sealing portion 4. With this configuration, the distance from the lower limit wall 42 to the upper limit wall 43 can be made longer than that of the conventional drainage device, and by doing so, it is possible to prevent the inside of the water reservoir 41 from being ruptured. it can.
The inflow leg 44 is a portion where the drainage of the water sealing portion 4 flows in, and in this embodiment, it is a pipe body on the drain port 2 (apparatus) side in which the drainage flows into the water sealing portion 4. In this embodiment, as shown in FIG. 13, the leg cross-sectional area ratio of the inflow leg 44 and the outflow leg 45 is approximately inflow leg 1: outflow leg 2. The larger the leg cross-sectional area of the outflow leg 45 than the leg cross-sectional area of the inflow leg 44, the more effective the prevention of sealing.
The outflow leg 45 is a portion where the drainage of the water sealing portion 4 flows out, and is a portion from the lower limit wall 42 to the uppermost end of the upper limit wall 43.
In this embodiment, as shown in FIG. 13, the leg cross-sectional area ratio of the inflow leg 44 and the outflow leg 45 is approximately set to inflow leg 1: outflow leg 2.
In this way, even in the so-called inverted one-type trap-shaped water sealing portion 4 using a cylindrical deodorizing pipe that can be detachably attached to the lower limit wall 42 from the drain port 2, the sealing is effectively prevented. be able to.

As shown in FIGS. 14 and 15, the water sealing portion 4 may have a structure other than the so-called partition wall trap shape shown in the above embodiment. The water sealing portion 4 at this time may have a structure having a water sealing depth having a sealing function by water sealing.
In the other embodiments shown in FIGS. 14 and 15, the water sealing portion 4 is provided as a so-called one-type trap shape using a one-shaped deodorant pipe that allows the lower limit wall 42 to be detachably attached from the drain port 2. There is. In the embodiment, a one-type drain trap as a water sealing portion 4 is formed on the upstream side, and a valve body portion 6 is configured downstream from the water sealing portion 4 via a pressure adjusting chamber 5. The valve body portion 6 in this embodiment uses a self-sealing drain trap 61, and the central axis of the valve body portion 6 is substantially parallel to the central axis of the inflow leg 44 of the water sealing portion 4. It is arranged like this.
In the water sealing portion 4 in this embodiment, a one-shaped deodorizing pipe that can be detachably attached from the drain port 2 is used as the lower limit wall 42, and the partition wall is formed by rising cylindrically from the lower end of the water reservoir 41 upward. Is the upper limit wall 43, and the so-called one-type trap shape is formed in which the sealing depth is formed by the cooperation of the lower limit wall 42 and the upper limit wall 43. Further, the central axes of the outflow port 8 and the outflow leg 45 are configured to be coaxial and concentric circles.
Further, an upper end surface 431 is formed on the top surface of the upper limit wall 43, and the drainage in the water sealing portion 4 passes over the upper end surface 431 and is discharged to the first outlet side.
The shortest distance WL between the inner surface of the lower limit wall 42 and the inner surface of the upper limit wall 43 is the distance of the WL in FIGS. 14 and 15. Further, the distance of the WL shown in FIGS. 14 and 15 is water excluding at least the upper limit wall of the cut surface (AA'cross-sectional view of FIG. 14, that is, FIG. 15) including the upper end surface 431 of the water sealing portion 4. It is configured to be longer than the maximum wall thickness of the sealing portion 4. With this configuration, the distance from the inner circumference of the upper limit wall 43 of the upper end surface 431 to the outflow port 8 can be made longer than that of the conventional drainage device, and by doing so, the inside of the water reservoir 41 is broken. Sealing can be prevented.
Further, the wall thickness of the upper limit wall 43, the distance of WL shown in FIGS. 14 and 15, is the cut surface including the upper end surface 431 of the water sealing portion 4 (A-A'cross-sectional view of FIG. 14, that is, FIG. 15). It is thicker than the maximum wall thickness of the water sealing portion 4 excluding at least the upper limit wall. With this configuration, the distance from the inner circumference of the upper limit wall 43 of the upper end surface 431 to the outflow port 8 can be made longer than that of the conventional drainage device, and by doing so, the inside of the water reservoir 41 is broken. Sealing can be prevented.
Further, the inflow leg 44 is a portion where the drainage of the water sealing portion 4 flows in, and in this embodiment, it is a pipe body on the drain port 2 (apparatus) side in which the drainage flows into the water sealing portion 4. In this embodiment, as shown in FIG. 15, the leg cross-sectional area ratio of the inflow leg 44 and the outflow leg 45 is approximately inflow leg 1: outflow leg 2. The larger the leg cross-sectional area of the outflow leg 45 than the leg cross-sectional area of the inflow leg 44, the more effective the prevention of sealing.
The outflow leg 45 is a portion where the drainage of the water sealing portion 4 flows out, and is a portion from the lower limit wall 42 to the uppermost end of the upper limit wall 43.
In this way, even in the so-called one-type trap-shaped water sealing portion 4 using the one-shaped deodorizing pipe that can be detachably attached to the lower limit wall 42 from the drain port 2, the sealing can be effectively prevented. Can be done.

1 Tank body 2 Drainage port 3 Drainage pipe 4 Water seal part 41 Water reservoir part 42 Lower limit wall 43 Upper limit wall 431 Upper end surface 44 Inflow leg 45 Outflow leg 5 Pressure control chamber 6 Valve body part 61 Self-sealing drain trap 611 Cylindrical body 612 Stop Water 71 Primary inlet 72 Secondary inlet 8 Outlet 81 Primary outlet 82 Secondary outlet WL Surface facing the upper limit wall of the lower limit wall and surface facing the lower limit wall of the upper limit wall Shortest distance between TL The shortest distance between the end facing the lower limit wall of the upper end surface and the end facing the outlet of the upper end surface

Claims (9)

A drainage port 2 for drainage to flow into the drainage pipe 3 and
A drainage pipe 3 that is connected to the drainage port 2 and drains the drainage from the drainage port 2 to the drainage pipe.
Arranged in the same system as the drainage pipe 3, it constitutes a water reservoir 41 provided inside, a lower limit wall 42 forming a lower limit wall for sealing water, and an upper limit wall 43 forming an upper limit wall for sealing water. Water seal part 4 and
A valve body portion 6 which is arranged in the same system as the drainage pipe 3 and constantly closes the in-pipe path and opens the in-pipe path when drainage occurs.
In a drainage system consisting of
Between the water sealing portion 4 and the valve body portion 6, an air pressure adjusting chamber 5 is formed in which the valve body portion 6 is an air pressure that blocks the in-pipe path .
A drainage device characterized in that the sealing depth of the water sealing portion 4 is less than 50 mm. In the water reservoir 41, the portion on the side where the drainage flows in is the inflow leg 44, and the portion on the side where the drainage flows out is the outflow leg 45.
The drainage device according to claim 1, wherein the leg cross-sectional area ratio of the inflow leg 44 and the outflow leg 45 is set to inflow leg 44: outflow leg 45 = about 1: 2. In the drainage device
The drainage device according to claim 1 or 2, wherein the water sealing portion 4 is arranged upstream of the valve body portion 6. In the drainage device
The drainage device according to claim 1 or 2, wherein the water sealing portion 4 is arranged downstream from the valve body portion 6. The drainage according to any one of claims 1 to 4 , wherein the central axis of the valve body portion 6 is arranged so as to be substantially parallel to the central axis of the inflow leg 44 of the water sealing portion 4. apparatus. The invention according to any one of claims 1 to 4 , wherein the central axis of the valve body portion 6 is arranged so as to be substantially orthogonal to the central axis of the inflow leg 44 of the water sealing portion 4. Drainage device. The valve body portion 6 is formed on the upstream side of the tubular body 611 to which drainage flows in, and the water stop portion 612 formed continuously so as to taper from the tubular body 611 toward the downstream tip direction. The drainage device according to any one of claims 1 to 6 , wherein the self-sealing drainage trap 61 constitutes the above. The water sealing portion 4 is configured such that the opening downstream of the outflow leg 45 is an outflow port 8 so that the central axis of the outflow port 8 and the inflow leg 44 is not coaxial.
The top surface of the upper limit wall 43 is set to the upper end surface 431.
In a cross-sectional view along the horizontal direction at the end of the upper end surface 431,
The length TL of the shortest distance between the end of the upper end surface 431 facing the lower limit wall 42 and the end of the upper end surface 431 facing the outlet 8.
The drainage device according to any one of claims 1 to 7 , wherein the water sealing portion 4 is configured to be longer than the maximum thickness of the outer peripheral wall . The water sealing portion 4 is configured such that the opening downstream of the outflow leg 45 is an outflow port 8 and the central axis of the outflow port 8 and the outflow leg 45 is coaxial.
The top surface of the upper limit wall 43 is set to the upper end surface 431.
In a cross-sectional view along the horizontal direction at the end of the upper end surface 431,
The length TL of the shortest distance between the end of the upper end surface 431 facing the lower limit wall 42 and the end of the upper end surface 431 facing the outlet 8.
The drainage device according to any one of claims 1 to 7 , wherein the water sealing portion 4 is configured to be longer than the maximum thickness of the outer peripheral wall .

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