JPH06306908A - Drain trap - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a drain trap having a check valve and a highly reliable valve opening / closing operation despite having a check valve. [Structure] An outer cylinder member 1 made of synthetic resin and having a bottom, which is inserted into a pipe A with a predetermined circumferential gap and has a drainage through hole 5 formed in a cylinder wall, and inside the outer cylinder member. An inner cylinder member 2 made of synthetic resin, which has a predetermined circumferential gap and which is detachably attached by screw coupling and has a lower end opening portion which is a valve seat positioned below the through hole 5 and which is fitted at both upper and lower ends, and the outer portion. A ping-pong ball-shaped float valve body 3 capable of vertically moving in the water stored in the tubular member to open and close the lower end opening of the inner tubular member, and the inner tubular member and the outer tubular member for the drainage port a of the pipe. And a mounting means 4 composed of a flange 8 and a packing 8 for mounting to

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building sink, a washbasin,
The present invention relates to a drain trap that is attached to the drain holes of bathrooms and urinals to prevent backflow of harmful gases, odors, and insects from drain pipes and sewers into the room.

[0002]

2. Description of the Related Art As this kind of drainage trap, there is one that stores (sealing) water in the middle of a pipe and blocks backflow of gas and odor by this water. Depending on its shape, S trap, P trap, U trap, Some are called drum traps and bowl traps.

In addition, as disclosed in Japanese Utility Model Laid-Open No. 3775/1993, instead of the above-mentioned water sealing method, a valve which floats in the stored drainage closes the valve seat in the middle of the drainage pipe. There is also a drain trap equipped with a check valve.

[0004]

In the former drain trap, however, the backflow of gas, odor, etc. can be prevented by water, but as seen especially when the wastewater is discharged live, the backflow of insects, etc. There was a problem that could not be prevented.

On the other hand, in the latter drain trap, a ball valve mechanically tries to prevent backflow of insects and the like in addition to backflow of gas and odor. Since it is always on the surface of the water, there is a problem that the opening and closing operation of the valve is not reliable because the ball valve receives too much buoyancy when opening and closes immediately even if it opens. in addition,
Since the effect of sealing water cannot be obtained at all, there is a drawback that the trap performance is low.

The present invention solves such a problem, and an object of the present invention is to provide a drainage trap having a check valve and a highly reliable opening / closing operation of the valve despite having a check valve.

[0007]

A drain trap according to the present invention for achieving the above-mentioned object is inserted into a pipe with a predetermined circumferential gap, and a drain hole is formed in a cylindrical wall. An outer cylinder member having a bottom, an inner cylinder member having a predetermined circumferential gap in the outer cylinder member, being removable, and having upper and lower ends opened and fitted with the lower end opening located below the through hole, Float valve body capable of vertically moving in the water stored in the outer cylinder member to open and close the lower end opening of the inner cylinder member, and an attachment for mounting the inner cylinder member and the outer cylinder member to the drain port of the pipe And means.

[0008]

According to the above construction, the backflow of gas, odor, etc. is prevented by the drainage stored in the inner and outer cylinder members, and the float valve body is closed to prevent gas, odor, etc. as well as insects, etc. Backflow is also prevented, and the trap performance is improved.

Further, since the float valve body is always underwater, the buoyancy change is small when the valve is opened, and the valve opening / closing operation is stable and reliability is improved.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a first embodiment of the present invention.
It is an example in which the drain trap according to the present invention is formed in a medium size and is attached to a pipe such as a bathroom and a toilet.

As shown in the figure, the drain trap includes an outer cylinder member 1 having a bottom, an inner cylinder member 2 which is detachably fitted to the outer cylinder member 1, and whose upper and lower ends are open, and a lower end of the inner cylinder member 2. A float valve body 3 for opening and closing the opening, and a mounting means 4 for mounting the inner cylinder member and the outer cylinder member to the drainage port a of the pipe A.
And are the main components.

The outer cylinder member 1 is set to have a cylinder outer diameter which is inserted into the pipe A with a predetermined circumferential gap, and a plurality of drainage through holes 5 are circumferentially arranged in the upper part of the cylinder wall. It is made of synthetic resin and is provided with a female screw portion 6 on the inner periphery of the upper end of the cylinder wall.

The inner cylinder member 2 is set to have a cylinder outer diameter which is inserted into the outer cylinder member 1 with a predetermined circumferential gap, and the lower end opening thereof has a predetermined dimension larger than that of the through hole 5. It is made of synthetic resin and is set to have a cylinder length so that it is located only below, and a male screw portion 7 to be screwed into the female screw portion 6 is provided on the outer periphery of the upper end portion of the cylinder wall.

The float valve body 3 is made of a material such as synthetic resin having a spherical diameter larger than the outer diameter of the inner cylinder member 2 and smaller than the inner diameter of the outer cylinder member 1 and having a specific gravity smaller than water. It is formed of a floating ball (for example, a ping-pong ball).

The mounting means 4 is integrally attached to the packing 8 fixed to the outer circumference of the upper end of the cylindrical wall of the outer cylindrical member 1 and press-fitted into the drain port a, and to the upper end of the cylindrical wall of the inner cylindrical member 2. And a flanged portion 9 having an upper large-diameter taper tubular shape that can be engaged with the peripheral edge portion of the drainage port a.

In the figure, 10 is a pair of left and right knobs formed integrally with the flange portion 9, and 11 is a wire mesh mat fitted in the upper end opening of the inner tubular member 2 for preventing dust and the like from flowing out.

With such a structure, when water flows into the inner tubular member 2 from the flange portion 9 and the wire mesh mat 11 with the drain trap installed in the pipe A as shown in the figure, this water is generated. The float valve body 3 is retained in the outer cylinder member 1 while being lowered, and eventually overflows from the through hole 5 and flows out to the external pipe.

When the pouring is completed, water is collected in the outer cylinder member 1 and the inner cylinder member 2 at the water level up to the lower edge of the through hole 5, and
The float valve body 3 rises due to its buoyancy and closes the lower end opening of the inner cylinder member 2 as a valve seat.

Thus, the reverse flow of gas, odor, etc. from the external pipe is reliably prevented by the triple trapping action of the water accumulated in the outer cylinder member 1 and the inner cylinder member 2 and the closing of the float valve body 3. To be done.

On the other hand, the backflow of insects or the like passing through the water is prevented by mechanically blocking the passage by closing the float valve body 3.

Since the float valve element 3 is always in water when opening and closing, the buoyancy change is small when the valve is opened and the opening and closing operation is smoothly performed. Further, since the outer cylinder member 1 and the inner cylinder member 2 are separable from each other, when an object is dropped, it can be easily picked up and cleaned easily.
Further, this drain trap can be easily attached to the drain port a through the attaching means 4 without any construction cost.

FIG. 2 shows a pipe B for draining the drain trap.
It is an example attached to. According to this, the flange-shaped portion 9 is formed large and deep, and the large dust-collecting basket 12 is installed therein.

FIG. 3 shows an example in which the drain trap is attached to a pipe C of a bathroom (unit / bath) or the like. According to this, the entire trap is made slightly smaller.

FIG. 4 shows an example in which the float valve element 3 of the drain trap shown in FIG. 1 is formed in a crescent or hemispherical shape instead of a floating ball. According to this, there is an advantage that the outer cylinder member 1 can be shortened.

[0025]

As described above in detail with reference to the embodiments, according to the drain trap of the present invention, since the float valve body that opens and closes in water is newly installed, insects can be added to the backflow of gas and odor. It is possible to reliably prevent backflow such as the above, and to obtain high reliability in opening and closing the valve.

[Brief description of drawings]

FIG. 1 is a side view of a drain trap according to a first embodiment of the present invention.

FIG. 2 is a side view of a drain trap according to a second embodiment of the present invention.

FIG. 3 is a side view of a drain trap according to a third embodiment of the present invention.

FIG. 4 is a side view of a drain trap according to a fourth embodiment of the present invention.

[Explanation of symbols]

 1 Outer cylinder member 2 Inner cylinder member 3 Float valve body 4 Mounting means A Piping

Claims (3)

[Claims] 1. A bottomed outer cylinder member that is inserted into a pipe with a predetermined circumferential gap and has a drainage through hole formed in a cylinder wall, and a predetermined circumferential gap in the outer cylinder member. An inner cylinder member which has a vertically lower opening and which is fitted and has a lower end opening located below the through hole; and an inner cylinder member which moves up and down in water stored in the outer cylinder member. A drain trap comprising: a float valve body capable of opening and closing a lower end opening; and a mounting means for mounting the inner cylinder member and the outer cylinder member to a drainage port of the pipe. 2. The drain trap according to claim 1, wherein the float valve body is formed in a spherical shape. 3. The drain trap according to claim 1, wherein the float valve body is formed in a crescent shape or a hemisphere shape.