JPH0447515Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an improvement of a drainage trap installed on the floor of a building such as a clean room or on a workbench.

[Background of the idea]

Generally, even highly purified clean rooms are equipped with drainage traps because they use water, solvents, etc. Conventionally, this type of drainage trap has a main body 70 formed of a cylindrical body with a dual structure inside and outside, as shown in FIG. The structure is equipped with the following. An opening 74 is formed at the lower end of the cap 72, and the waste water flows down the outside of the cap 72, passes through the opening 74, and flows out into the opening of the inner cylinder 70B. Normally, the waste water that remains at the bottom of the main body 70 closes the opening 74 at the lower end of the cap 72, thereby preventing air, odor, etc. from blowing up from the drain pipe 76 side.

[Problem that the invention attempts to solve]

However, in such a drainage trap, the humidity inside the clean room is dry,
Since the floor has high air permeability, the water inside the drain trap main body 70 evaporates, resulting in a drought condition. Therefore, when the water sealing effect is lost and the pressure inside the clean room becomes negative at night, there is a problem that contaminated air and odors blow up from the drain pipe 76.

The present invention was developed in view of these circumstances, and the purpose is to propose a drainage trap that can reliably prevent contaminated air and odors from blowing up even when the inside of the trap itself is in a dry state. do.

[Means for solving the problem] In order to achieve the above object, the present invention consists of a cylinder with a double structure of an inner cylinder and an outer cylinder. The inner cylinder is closed with a main body in which a second seating surface is formed at the upper end of the cylinder, a lower end opening of the inner cylinder is connected to the drainage side, a lower part that can close the second seating surface of the inner cylinder, and a lower part. It is characterized by comprising a closure member that has an upper part that sometimes comes into contact with the first seating surface of the outer cylinder to seal the opening of the outer cylinder, and that can be floated by the drainage water retained in the outer cylinder. There is.

[Effect]

According to the drainage trap of the present invention, when sufficient water accumulates in the drainage trap body, the floating stopper member floats up due to the drainage accumulated in the main body. As a result, the floating closure member opens the opening of the inner cylinder and is separated from the opening of the outer cylinder. Therefore, the waste water flows freely to the drain side.
On the other hand, during a drainage drought, the closure member closes the opening of the inner cylinder and also seals the opening of the outer cylinder. Therefore, there is no risk of contaminated air, odor, etc. blowing up from the drain pipe. Furthermore, since the opening of the outer cylinder is sealed, there is no risk that the waste water remaining at the bottom of the outer cylinder will evaporate and diffuse into the room and cause contamination.

〔Example〕

Hereinafter, preferred embodiments of the drainage trap according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view of a clean room equipped with a drainage trap according to the present invention. As shown in FIG. 1, the ceiling chamber 12 of the clean room 10 is provided with an inlet 14 on the right side, and circulating air is supplied to the ceiling chamber 12 through this inlet 14. In addition, a plurality of HEPA (high performance) filters 16 are arranged in the ceiling chamber 12, and the air in the ceiling chamber 12 is
It passes through a HEPA filter 16 and is sent into the room 20.

Furthermore, a plurality of bundles 30, 30, .
It is sucked into the underfloor chamber 34 through this floor surface 32. An intake port 36 is provided on the right side of the chamber 34, and the intake port 36 is connected to an outside air introduction duct 42 of an air conditioner 40 via an intake duct 38, and the conditioned air mixed by this air conditioner 40 is sent to a blower 44. As a result, the air is again supplied to the ceiling room 12 via the air supply duct 46. Therefore, clean air flows down into the room 20.

Further, a drainage trap 50 is provided on the floor surface 32, and water, solvents, etc. used in the room 20 are drained.
The water is discharged from the drain trap 50 to the outside of the clean room 10 through the drain pipe 51.

As shown in FIGS. 2 and 3, the main body 52 of the drain trap 50 has an outer cylinder 52A with an open top end and an outer cylinder 52A with an open top end, and an open top and bottom end coaxially formed integrally with the bottom of the outer cylinder 52A. It has a shaped inner cylinder 52B. A drain pipe 51 is connected to the lower end of the inner cylinder 52B. A closure member 56 is disposed on the upper surface of the inner cylinder 52B, and the closure member 56 is made of a hollow plastic material and has a float function so that the entire body floats on water or a solvent. Therefore, the closure member 56 has a structure in which it floats up when the waste water 58 is sufficiently stored in the outer cylinder 52A. A lower portion 56A of the closure member 56 is formed into a cap shape and covers the upper end opening 57 of the inner cylinder 52B. Further, as shown in FIG. 3, when the drainage water is dry, the lower part 56A of the closure member 56 is brought into contact with the upper end of the inner cylinder 52B, and the upper end opening 57 of the inner cylinder 52B can be seated and closed by its own weight. . The upper part 56B of the closure member 56 is formed into a spherical shape, and the lower part 56B
When the upper end opening 57 of the inner cylinder 52B is closed by A, the outer peripheral surface of the spherical upper part 56B comes into contact with the concave inner peripheral surface 60 of the outer cylinder 52A. The opening 61 can be closed.

According to the drain trap according to the present invention constructed as described above, when a sufficient amount of waste water is stored in the main body 52 of the drain trap, the stopper member 56 floats up due to buoyancy as shown in FIG. The inner cylinder 5 passes between the outer cylinder 52A and the outside of the closure member 56.
It flows from the upper end opening 57 of 2B to the drain pipe 51.
On the other hand, when the main body 52 is in a water shortage state, the closing member 56 is lowered by the float action, and the upper end opening 57 of the inner cylinder 52B is closed by the lower part 56A, and the spherical surface of the upper part 56B is turned inside the outer cylinder 52A. It comes into contact with the concave surface 60 of the peripheral wall and seals the opening 61 of the outer cylinder 52A. Therefore, during times of drought, the blowing of contaminated air or odor from the drain pipe 51 is completely blocked, and furthermore, the drainage steam remaining in the outer cylinder 52A is sealed off at the opening 61 of the outer cylinder 52A. Therefore, there is no risk of it spreading into the clean room 10.

In the above embodiment, the lower part 56A of the closure member 56 is formed into a cap shape to cover the upper end opening 57 of the inner cylinder 52B, but the present invention is not limited to this. As shown in the second embodiment of FIG.
The lower end surface 66A of 6 may be formed flat to close the upper end opening 57.

[Effect of idea]

As explained above, according to the drain trap of the present invention, the closing member is provided with a float function, and when the drainage trap body has sufficient drainage, the closing member floats so that the drainage flows toward the drain side. In the event of a water shortage, the valve can be seated on the inner cylinder and closed to shut off air blown from the drain side, thereby reliably preventing contaminated air and odor from blowing out from the drain side.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a clean room equipped with a drain trap according to the present invention, Figs. 2 and 3 are cross-sectional views of a drain trap according to the present invention, and Fig. 4 is a cross-sectional view of a clean room equipped with a drain trap according to the present invention. FIG. 5 is a cross-sectional view of a conventional drainage trap. 50...Drainage trap, 52...Main body, 52A
...Outer cylinder, 52B...Inner cylinder, 56...Closing member,
56A... Lower part of the closure member, 56B... Upper part of the closure member, 57... Opening of the inner cylinder, 60... Inner peripheral surface of the outer cylinder, 61... Opening of the outer cylinder.

Claims (1)

[Scope of utility model registration request] Consisting of a double-structured cylinder body consisting of an inner cylinder and an outer cylinder, a first seating surface is formed on the outer cylinder, a second seating surface is formed on the upper end of the inner cylinder, and the lower end opening of the inner cylinder is on the drainage side. a main body connected to the inner cylinder, a lower part capable of closing a second seating surface of the inner cylinder, and a lower part that comes into contact with the first seating surface of the outer cylinder to seal the opening of the outer cylinder when the inner cylinder is closed. What is claimed is: 1. A drainage trap comprising: a closure member which can be floated by drainage retained in an outer cylinder;