JP2000087411A - Drainage trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage trap preventing close contact of a valve element and ensuring a good draining efficiency when water is drained and a good closability when water is not drained. SOLUTION: A pipe port 42 serving as a drainage outflow port is diagonally tilted, and a drainage trap comprises an oscillating valve element 43, which is freely oscillationally supported on an oscillating shaft and capable of opening and closing the pipe port 42 by moving into and out of contact with the pipe port 42 from below, the oscillating shaft being provided at the upper end of a tilted face at the pipe port 42, and a balance weight energizing the valve element 43 in its closing direction. One or more small projections are formed at the part of the pipe port 42 making contact with the oscillating valve element 43, to support the oscillating valve element 43 at their apexes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a trap for drainage.

[0002]

2. Description of the Related Art Conventionally, drain pipes have been provided with an S-shaped trap for the purpose of preventing intrusion of bad odors, pests and the like from the outlet side. Since this S-shaped trap is for preventing the invasion of bad smells and pests by the drainage collected in the bent portion of the drain pipe, there is a problem that the bent portion is liable to be clogged with solids and the like.

Therefore, the present applicant has provided a balance weight on a swing valve element capable of opening and closing a pipe port, and when there is no drainage, closes the pipe port with the valve element using the balance weight.
At the time of drainage, a valve trap has been developed that opens the valve body by the weight of the drainage or the flowing water pressure and allows the drainage to flow down. This valve trap is mechanically simple and requires little maintenance.However, depending on the situation of use, the valve plug adheres to the pipe port due to residual water remaining along the contact area between the valve plug and the port. However, there has been a problem that the opening / closing property of the valve trap is deteriorated or, in a severe case, cannot be opened / closed.

[0004]

DISCLOSURE OF THE INVENTION In view of the above problems of the prior art, the present invention prevents a valve body from adhering, and provides a drainage trap with good drainage efficiency during drainage and good sealing performance during non-drainage. The purpose of this is to provide.

[0005]

In order to achieve the above-mentioned object, in the drain trap of the present invention, a pipe port forming a drainage outlet is inclined at an angle and provided on the upper end side of the inclined surface of the pipe port. A swinging valve body that is swingably supported by the swinging shaft and that comes into contact with and separates from the pipe port from below to open and close the pipe port, and a balance weight that urges the valve element in the closing direction. In the drainage trap thus obtained, the swing valve body is formed in a curved shape in which a central portion protrudes upward with respect to a peripheral portion of the valve body.

[0006]

1 to 4 show a drain trap 1 according to an embodiment of the present invention. In the figure, a drain trap 1 includes a casing 3 provided between drain pipes 2a and 2b.
Is provided with a valve trap unit 4.

The valve trap unit 4 basically has a lower half of a short cylinder having a length substantially equal to the diameter of the lower cylinder (30 ° to 45 °).
(°)), a valve body 43 for opening and closing the inclined pipe opening 42, and a balance weight 44 for urging the valve body 43 in the closing direction.

[0008] The pipe port 42 has about one third of the upper end side of the inclination.
A projecting piece 45 is formed at an arcuate portion corresponding to (an opening area ratio of about 1/4), and a pair of downwardly projecting supports are formed on both sides of the portion where the projecting piece 45 is formed. An arm 46 is provided, and the valve element 43 is supported by a support shaft 47 extending between the support arms 46 so as to be swingable.

The valve body 43 is composed of a valve body 43a having a substantially elliptical outer shape the same as that of the tube port 42, and a flat weight holding portion 43b connected to the valve body 43a. The bearing 43 is bent at an angle of about 135 ° with respect to the portion 43a, and the bending portion is provided with a bearing portion 43 through which the support shaft 47 is inserted.
c is formed.

As shown in FIG. 2B, the valve main body 43a has a smooth three-dimensional curved shape in which a central portion 43d projects upward with respect to a peripheral edge 43e. In the example shown,
The portion of the valve body 43a that contacts the overhanging piece 45 is a flat portion 43.
However, if the end 45e of the overhanging piece 45 is formed in an arc shape, the flat portion 43f may not necessarily be formed.

A flange portion 48 is formed at the upper end of the valve trap unit 4 so as to protrude outward in the radial direction.
The valve trap unit 4 is fixed to an intermediate portion of the casing 3 by screwing the respective portions 3a and 3b together while holding the valve traps 4a and 3b.

Drainage trap 1 constructed as described above
Is usually the balance weight 4 as shown by the solid line in FIG.
The valve body 43 is urged in the clockwise direction in the figure by the weight of 4 and abuts on the pipe port 42, and the valve port 43 is closed by the valve element 43.

In this state, as shown in FIGS. 1 and 3, a certain amount of drainage W corresponding to the weight of the balance weight 44 is provided.
Always remains in the pipe 41, but since the valve body 43 has the above-described curved shape, the drainage W flows along the peripheral edge 43e of the valve body 43 and the contact portion with the pipe port 42. The wastewater W itself remains, and the valve body 43 and the pipe opening 4
2 is sealed at the contact portion with the drain pipe 2b.
Infiltration of foul odors and pests from the side is prevented.

If there is drainage, if the amount of drainage is small, a certain amount of drainage W remains in the pipe 41 and the valve body 4
The valve body 43 is slightly pushed down while maintaining the sealed state between the valve 3 and the pipe port 42, and the drain water flows down. On the other hand, when the amount of drainage is large, the valve element 43 is pushed down as indicated by 43 'against the urging force of the balance weight 44 as shown in FIG.

At this time, since the valve body 43 has the above-mentioned curved surface shape, the drainage flows down along the curved surface, and the drainage not only flows on the lower end side of the valve body 43 but also on the peripheral edge 43e.
Since the water is dispersed and flowed down as a whole, the drainage efficiency is better than in the case of the conventional flat valve body, and the adhesion of dirt to the pipe body 41 and the valve body 43 is reduced, so that the drainage has a lot of slime. Even under such poor operating conditions, the openability of the valve body 43 is always kept good.

Further, since the opening degree of the valve body 43 becomes smaller than the drainage amount, the trapping function at the time of drainage and the closing responsiveness at the time of drainage stoppage are also improved.

In the above embodiment, the drain trap 1 is connected between the drain pipes 2a and 2b. However, the drain trap 1 may be provided at the start or end of the drain pipe. In the case of providing at the inlet, the casing 3 may be omitted and the valve trap unit 4 may be directly inserted into the drain port.

[0018]

Since the drain trap of the present invention is constructed as described above, the drainage efficiency is good, and it is possible to prevent the adhesion of dirt to the valve body and the pipe mouth and the accompanying close contact between the valve body and the pipe mouth. ,
The open / close characteristics of the valve body are always kept good, and the opening degree of the valve body at the time of drainage is reduced, so that it functions as a trap at the time of drainage, and also has a good closure response at the time of drainage stoppage. And the like can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a trap for drainage according to an embodiment of the present invention.

FIG. 2A is a perspective view showing a valve trap unit of a drain trap according to an embodiment of the present invention, and FIG. 2B is a perspective view showing a valve body thereof.

FIG. 3 is a plan view showing a valve trap unit of the drain trap according to the embodiment of the present invention.

FIG. 4 is a side sectional view showing an operation state of the drain trap according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drainage trap 2a, 2b Drainage pipe 4 Valve trap unit 41 Pipe 42 Pipe mouth 43 Valve 43d Central part 43e Peripheral part 44 Balance weight

Claims (1)

[Claims] 1. A pipe port forming an outlet for drainage water is inclined obliquely, and is swingably supported by a rocking shaft provided on an upper end side of an inclined surface of the pipe port, and is connected to the pipe port from below. In a drainage trap constituted by separating a swingable valve body capable of opening and closing the pipe opening, and a balance weight for urging the valve body in a closing direction, the swingable valve body is moved relative to the valve body peripheral portion. A trap for drainage, characterized in that a central portion is formed in a curved shape protruding upward.