JPS6015826Y2 - drain trap - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drain trap installed in a sink of a sink or the like.

Conventionally, a bell-shaped drainage trap has been used as this type of drainage trap, and has a water-sealing structure to block odors from the downstream side.

However, in high-rise housing complexes where drainage is carried out through collecting pipes, the water sealing water may flow out due to the drainage flowing down the collecting pipes, making it impossible to block out odors.

As a drainage trap to prevent such a situation,
There is an idea described in Japanese Patent No.-27354.

This is a device in which a valve is provided in the deodorizing lid so that the valve opens when the inside of the deodorizing lid becomes negative pressure.

In this case, it is possible to prevent the seal water from flowing out due to the siphon effect caused by the flowing sewage, but the seal water may not flow out due to other causes, such as evaporation of the seal water or malfunction of the valve body. If it runs out, the desired deodorizing effect will not be achieved.

In addition to the deodorizing effect of the conventional drain trap described above, the odor passage is mechanically blocked as the amount of sealed water decreases, ensuring the deodorizing effect regardless of whether or not the water is sealed. The purpose is to

The technical means of the present invention, which is a distant relative of the above object, is that the odor-proof lid is a float type that floats by sealing water, and the odor-proof lid is mounted on the overflow tube so that it can rise and fall freely, and the lower end of the odor-proof lid is attached to the overflow tube. The odor-proof lid is placed opposite to the bottom of the sealed water reservoir located on the outer periphery, so that when the amount of sealed water decreases, the entire lower end of the odor-proof lid is airtightly opposed to the bottom, and the odor-proof lid is placed on or near the top surface of the odor-proof lid. This is achieved by providing a normally closed valve element that opens when pressure decreases.

The above technical means of the present invention operates as follows.

When a siphon effect occurs due to the drainage water flowing down the drainage collection pipe, the internal pressure of the deodorizing lid decreases and the normally closed valve body opens, eliminating the pressure difference between the inside and outside of the deodorizing lid, and preventing the sealed water from flowing out.

At this time, since the odor-proof lid is a float type, at the same time,
The odor-proof lid is also lowered by suction pressure, so if a sudden negative pressure occurs, the lower end of the odor-proof lid will come into contact with the bottom of the sealed water reservoir, preventing the sealed water from flowing downstream. Prevented.

When the negative pressure state is eliminated, the deodorizing lid and the normally closed valve body return to their initial states.

Next, if the sealed water leaks out or decreases for some reason, the odor-proof lid is lowered and its lower end comes into contact with the bottom of the sealed water reservoir, and in this case as well, the odor flowing back from the overflow tube is blocked. .

In addition, even if the normally closed valve body installed on the odor-proof lid has a valve opening failure,
When a negative pressure condition occurs, the odor-proofing lid descends to cut off the drainage circuit in the same manner as described above, so that the outflow of sealed water is also prevented in this case.

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

(1) Even if the water seal is lost, the odor-proof lid can prevent odor from flowing back.

(2) In the negative pressure state, the odor-proof lid also operates to prevent the seal water from flowing out, so the effect of preventing the seal water from flowing out is improved.

(3) Even if the normally closed valve body of the odor-proof lid malfunctions, the outflow of sealed water can be prevented.

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

In FIG. 1, 1 is a trap body, which is attached to the bottom 2 of a sink.

An overflow pipe 3 protrudes upward from the center of the bottom of the trap body, and a connecting portion 4 at the lower end of the overflow pipe protrudes downward from the bottom of the trap body 1 and is connected to a drainage collecting pipe 5.

The overflow pipe is covered with a bell-shaped deodorizing lid 6, and a through hole 8 is opened in the center of the upper base 7 of the deodorizing lid, and a normally closed valve body 9 abuts from below. .

Further, the circumferential side of the deodorizing lid 6 is formed in a hollow shape, and the volume of the hollow chamber 10 and the weight of the deodorizing lid 6 are set appropriately in advance.
The deodorizing lid is appropriately provided with floating blades.

Further, the deodorizing lid 6 is inserted into a cylindrical portion 12 that projects downward from the bottom of a filtration container 11 that is internally fixed to the trap body 1, and is movable up and down within the cylindrical portion.

In the drain trap of the embodiment described above, the waste water flowing into the trap body 1 is passed through the filter container 11 through a large number of small holes 13, 1.
3 and reaches the bottom of the trap body 1, and flows out from the gap between the deodorizing lid 6 and the overflow tube 3 to the drainage collection pipe 5 via the overflow tube 3 and the communication pipe 14.

After the drainage is completed, a sealed water 15 is stored at the bottom of the trap body 1, and a part of the circumferential side of the odor-proof lid 6 is submerged in the sealed water, and the drainage collecting pipe 5 and Connecting pipe 14
The odor generated in the trap body 1 is blocked by the water seal and does not reach the upper part of the trap body 1, that is, the indoor side.

In this state, when wastewater flows down inside the drainage collecting pipe 5 from above, a negative pressure is created inside the connecting pipe 14, that is, inside the overflow pipe 3 due to the siphon phenomenon, but this pressure drop causes the valve body 9 to open and the overflow pipe 3 and the upper side of the seal water 15, that is, the atmosphere side, communicate with each other, thereby preventing the seal water 15 from flowing out due to a siphon phenomenon.

When the drainage water finishes flowing down and the internal pressure in the communication pipe 14, that is, the overflow pipe 3 returns to atmospheric pressure, the valve body 9 is automatically closed by the spring 16 and restored to its initial state.

Therefore, in this state, the intrusion of odors is prevented by water sealing in the same manner as in the case described above.

Next, if the valve body 9 does not open for some reason, the sealed water 15 will flow out due to the pressure difference when there is flowing sewage in the drain collection pipe 5. However, in the above embodiment, the odor-proof lid Since 6 is a float type, the gasket 17 at the lower end of the deodorizing lid 6 is pushed down by this negative pressure.
comes into contact with the bottom of the trap body 1, thereby sealing the water 15.
leakage is prevented.

After the flowing water has passed, when the inside of the communication pipe 14 returns to atmospheric pressure, the deodorizing lid 6 returns to its initial state, and the subsequent drainage passage (from the trap body 1 to the overflow pipe 3) is opened for communication.

Furthermore, if the sealed water 15 flows out or decreases for some reason, the odor-proof lid 6 will fall and the gasket 17 at the lower end of the circumference will come into close contact with the bottom of the trap body 1, thereby blocking the odor backflow circuit. .

Therefore, even if the water seal 15 disappears or decreases, the deodorizing function is not impaired.

In addition, the amount of water flowing down the drainage collection pipe 5 of collective housing etc. may be large, and in order to eliminate the negative pressure state caused by the siphon phenomenon in this case, the through hole 8 may have to be made sufficiently large. No.

In response to such a request, the valve structure of the odor-proof lid 6 shown in FIG. can also be simplified.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the embodiment of the present invention, and Fig. 2 is an explanatory diagram of the valve structure of the odor-proof lid of another embodiment.・Odor-proof lid, 9... Valve body, 1
5... Water seal.

Claims (1)

[Scope of utility model registration request] The odor-proof lid is a float type that floats when sealed with water, and is placed on the overflow tube so that it can rise and fall freely.The lower end of this odor-proof lid is opposed to the bottom of the water seal reservoir located on the outer periphery of the overflow tube, and the amount of water sealed is When the odor-proof lid is depleted, the entire lower end of the deodorizing lid is airtightly opposed to the bottom part, and the drain trap is provided with a normally closed valve body that opens when the pressure inside the deodorizing lid decreases on or near the top surface of the deodorizing lid.