JPS6016709Y2 - drain trap - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drain trap that is installed at a drain outlet of a sink or the like to prevent backflow of odor from the downstream side.

Conventionally, this type of drain trap has a water-sealing structure that prevents the backflow of odors. ), and the lower end opening of the odor cover is immersed in the storage section.

High-rise housing complexes use a centralized drainage system, so
Drainage from the drainage trap is used by being concentrated in communication with the drainage source pipe, and when drainage from the upper floor flows down the drainage source pipe, the drainage trap on the lower floor is sealed by the siphon effect caused by the flowing sewage. The downstream side of the water becomes negative pressure, and the sealed water inside the drain trap flows out.

As a result, the odor backflow prevention function of the water seal is lost, and the odor flows back into the room.

As a solution to this inconvenience, Utility Model Application No. 53-273
There is a device described in Japanese Patent No. 54, in which a normally open valve body is provided on the odor cover of the conventional drain trap, and the valve body is located on the inner surface of the top of the odor cover.

In this case, when the downstream side of the drain trap is placed under negative pressure (low pressure) conditions, the normally closed valve opens and the downstream and upstream sides of the drain trap are connected through a circuit that does not involve water seals, and the downstream side of the seal water The negative pressure on the side is eliminated and the outflow of sealed water can be prevented.

However, since foreign matter such as dust and food scraps are mixed in the waste water, when these foreign matter are caught between the valve body and its opposing valve seat, the valve body is placed in an open state.

Therefore, there is no water seal.

Separate circuits connect the upstream and downstream sides of the drain trap, and the odor blocking effect is lost.

The present invention was developed in view of this point, and is designed to prevent the seal water from flowing out from the seal water reservoir when negative pressure acts on the seal water, thereby preventing the seal water from flowing out due to the siphon phenomenon. The aim is to keep it low.

The structure of the present invention is to fix a bowl that opens upward to the lower part of the main body, with the upper end opening as the inlet and the center of the lower bottom as the outlet, and a void around the entire outer periphery of the bowl to be connected to the void below the bottom of the bowl. The interior of the bowl and the discharge port are communicated through the main body, and a partition plate having a cylindrical portion projecting from the center of the lower surface to be immersed in the bowl is attached to the middle of the main body in an airtight manner on the outer periphery, and the cylindrical portion A response tube is inserted into the bowl so that the flange projecting from the upper end of the response tube can come into contact with the upper end of the body of the bowl.

In the present invention, with the above configuration, the upper end of the cylindrical reservoir formed on the outside of the response tube is closed by the collar portion projecting from the upper end of the response tube due to its own weight.

Therefore, even if the downstream side of the outlet, that is, the outer circumferential side of the bowl, becomes negative pressure, the low pile of the brim prevents the water from flowing out from the cylindrical reservoir, resulting in water sealing due to the siphon phenomenon. The decrease is also small.

Since the present invention has the above configuration, it has the following unique effects.

(1) Drainage flowing in from the inlet is carried out from the cylindrical part of the partition plate.
The water flows from the outer periphery of the bowl to the discharge port through the inside and outside of the reaction tube, and at this time, the reaction tube is lifted by the drainage flow, and the collar at the upper end of the response tube is separated from the upper edge of the body of the bowl.

Therefore, even if there is dirt between the brim and the upper end of the body of the bowl, the waste will be washed away by the drainage flow between the two that occurs every time water is drained, and the dirt will be washed away between the brim and the upper end of the bowl. Over a long period of time, there will be no inconvenience caused by the presence of dust.

(2) In conventional valve material drain traps, if dirt gets stuck in the valve structure, the odor will flow back through a different route from the sealed water, but in this invention, due to the above structure, Even if there is a gap between the collar and the response tube, the odor will be blocked by the water seal on the upstream side, so no backflow of odor will occur.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In Fig. 1, 1 is a main body, the upper end opening is an inlet 2, the bottom 3 is provided with an outlet 4 projecting downward, and the periphery of the inlet is connected to the bottom 5 of the sink etc. in an airtight manner. is attached to.

A partition plate 6 is attached to the middle of the main body in an airtight manner around the outer periphery, and a large number of small holes 7, 7 are bored in an appropriate range in the center of the partition plate, and these small holes 7, groups of 7 are formed. A cylindrical portion 8 is provided in a protruding manner below the range including.

The lower space partitioned by the partition plate, that is,
A bowl 9 that is open upward is fixed to the lower part of the main body 1, and the size and fixing position of the bowl are set appropriately to provide an appropriate gap around the entire outer periphery of the body 10 and below the bottom of the bowl. The interior of the bowl 9 and the discharge port 4 communicate with each other through the gap.

Further, a bottomed cylindrical reaction tube 11 is inserted between the cylinder portion 8 and the bowl 9, and a mouth portion 12 is opened at the center of the bottom of the reaction tube, and a collar portion 13 is extended outward from the upper end. The flange is extended so that it abuts the entire upper edge of the body 10 of the bowl.

The height of the response tube is set appropriately in advance, so that when the collar is in contact with it, its bottom 14 has an appropriate distance from both the bottom 3 of the main body 1 and the lower end of the tube 8. There is.

In addition, a mouth portion 1 is provided in the center of the bottom portion 14 of the reaction tube 11.
A guide cylinder 15 protrudes from the upper surface near the cylinder part 2, and is loosely fitted into the lower part of the cylinder part 8 at an appropriate interval.

To explain in more detail the function of the drain trap of the above embodiment, when waste water flows in from the inlet 2 and is discharged from the discharge port 4, it flows into the cylindrical part 8 through the small hole 7.7 in the center of the partition plate 6. The drainage flows into the bowl 9 from the mouth 12 of the bottom 14 of the reaction tube 11 and the outer periphery of the guide tube 15, and when the inside of the bowl becomes full of water, the reaction tube 11 is lifted and the upper end of the body of the bowl 9 is drained. A gap is formed between the bowl and the brim portion 13, and the inflowing waste water is discharged from the gap through the gap on the outer periphery of the bowl, the gap above the bottom portion 3, and the outlet 4.

(Fig. 2) The highest position of the reaction tube is 11.
It is regulated by the contact between the bottom part 14 of the cylinder part 8 and the lower end of the cylinder part 8.

When the drain water has finished flowing out, the reaction tube 11 also returns to its initial position due to its own weight, resulting in the state shown in FIG. 1, and the sealed water A is stored in the bowl up to the water level that corresponds to the body of the bowl 9. .

Therefore, the upstream side and the downstream side of the bowl 9 are prevented from backflowing due to the action of the cylindrical portion 8 submerged in the bowl 9 and the water seal A.

In this state, when a large amount of water flows from the discharge port 4 to the drainage source pipe 17 communicating through the communication pipe 16, the outer circumferences of the communication pipe 16, the discharge port 4, and the bowl 9 become in a negative pressure state (low pressure state). As a result, a pressure difference is created between the inside and outside of the bowl 9, and the water seal A is partially (cylindrical part 8)
A part of the sealed water located between the reaction tube 11 and the reaction tube 11 flows out, but since the collar 13 of the reaction tube 11 is brought into contact with the upper edge of the bowl 9 due to the weight of the reaction tube 11, Response tube 11
The outflow of the sealed water in the cylindrical cavity 18 on the outer periphery of is suppressed.

Therefore, even if the above-mentioned state continues to some extent, sufficient water sealing will remain, and when the above-mentioned differential pressure state is eliminated, the water level inside and outside the cylinder part 8 will be restored, and the cylinder part 8 will be immersed in the water seal A. Therefore, the odor blocking effect of the water seal A and the cylindrical portion 8 is not impaired.

(Fig. 3) This has also been experimentally proven, and the bowl 9
Using a main body with an outer diameter of 135 cm near the outer diameter of 12
4 cabinets, bowl 9 with height 100, body outer diameter 86~104 TI
When combining the response cylinder 11 with aR1 height of 957 m and the partition plate 6 having the cylinder part 8 with an outer diameter of 66 mm and a height of 98 mm, under the conditions shown in FIG. As a result, a water seal height of 50 to 53 mm was obtained as a result of supplying air at an air pressure of 50 mm to apply back pressure inside the drain trap, and repeating 5 seconds of air supply and 5 seconds of stopping the supply 5 times.

This value is
In other words, the water sealing amount is such that even when water is not supplied into the bowl 9 by drainage, the water sealing amount can sufficiently ensure that the water sealing water escapes by evaporation or the like.

Also, using the above main body, the bowl 9, the response tube 11' and the tube portion 8
As shown in FIG. 5, the results of experiments on various combinations of The larger F was, that is, the smaller the inner diameter of the cylindrical portion 8, the greater the amount of remaining water sealing under negative pressure conditions.

This is because the amount of sealing water flowing out due to the pressure difference between the inside and outside of the cylindrical portion 8 is proportional to the diameter of the cylindrical portion 8, and the water level after restoration is inversely proportional to the diameter of the cylindrical portion 8.

In the above embodiment, the flange 13 of the response tube 11 is configured to come into contact only with the upper end of the body 10 of the bowl 9, but as shown in FIG. Expanded diameter section 20
If a structure is provided in which the brim part can also come into contact with the step part 21, when the outer circumferential gap of the bowl 9 is in a negative pressure state, the inside of the bowl 9 will be reliably shut off by the downstream brim part 13. Under these conditions, the outflow of seal water is also extremely reduced.

Even in this case, since the reaction tube 11 is lifted during drainage, the collar portion 13 does not become an obstacle to draining the water.

In this case, if the reaction tube 11 is made of an elastic material such as synthetic resin so that the collar portion 13 can be elastically deformed, a small amount of space between the stepped portion 21 and the periphery of the collar portion 13 can be created when the reaction tube is in the lowered state. Even if a gap exists, the gap is closed by the pressure when negative pressure is applied.

Therefore, it is not necessary to precisely match the step portion 21 and the upper end of the bowl 9 to the flange portion 13, which facilitates manufacturing.

Furthermore, as shown in FIG. 4, the response tube 11 may have a shape in which a collar portion 13 extends outward from the upper end of a tube body 22 that is fitted onto the tube portion 8, and its weight may be set appropriately. Then, it functions in the same way as each of the above embodiments.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the embodiment of the present invention, Fig. 2 is a sectional view of its discharge state, Fig. 3 is an explanatory diagram of the state in which the seal water level has returned after a part of the seal water has flowed out, and Fig. 4 is an illustration of the discharge port. Make the downstream side negative pressure (
FIG. 5 is a graph showing the experimental results using this method, and FIGS. 6 and 7 are explanatory diagrams of other examples. In the figure, 2... ...Inflow port, 4.Oil discharge port, 6.Curve/partition plate, 7.....Small hole, butt...Cylinder part, 9.Curve.
Bowl, 11, curved tube, 13, curved brim.

Claims (1)

[Scope of utility model registration request] A bowl 9 that opens upward is fixed to the lower part of the main body, with the upper end opening serving as the inlet 2 and the center of the lower bottom 3 serving as the outlet 4, with a gap provided at the outer periphery of the bowl and below the bottom. The main body is divided into upper and lower parts by a partition plate 6 provided in the middle, and small holes 7 and groups of 7 are bored in an appropriate range in the center of the partition plate, and a range including the small hole groups on the lower center surface of the partition plate. The cylindrical part 8 is made to protrude and retracted into the bowl 9, and the collar 13 is made to protrude from the upper end of the response cylinder 11, which has a body part that fits externally into the cylindrical part.
A drainage trap in which the flange portion comes into contact with the upper edge of the bowl 9 due to the weight of the response tube.