JPS6038788Y2 - drainage trap - Google Patents

Description

[Detailed description of the invention] This invention is installed between a water tank or bathtub of kitchen furniture, or a drain formed on the floor and a drain pipe connected to sewage.
This invention relates to a new improvement of a drainage trap that stores wastewater inside and prevents the rise of bad odor from sewage.

Conventionally, an overflow tube and an odor-proof lid form a vertically curved drainage channel, and a trap body stores sealed water having a water level that corresponds to the upper end of the overflow tube, and the lower end of the odor-proof lid is placed within the sealed water. Drainage traps that are submerged in water and sealed to block earthy odors from sewage are known.

By the way, in such a drain trap, the suction force caused by the flow of water during draining causes a self-siphon phenomenon and the sealed water is sucked out, so it is necessary to ensure a predetermined level of water sealed inside the drain trap. There was a risk that I would not be able to do anything.

This invention was devised to solve the problems encountered in conventional drainage traps, and will be explained in detail below with reference to the drawings.

In the figure, 1 is a substantially cylindrical trap body whose upper end is connected to the drain of kitchen furniture, a water tank such as a washstand, a bathtub 2, or a drain formed on the floor of a bathroom, lavatory, washing area, etc. An overflow cylinder 3 is erected approximately at the center of the bottom surface.

The lower end of the overflow pipe 3 is connected to the drain pipe 1a on the bottom of the trap body 1.
The drain pipe (not shown) is connected to the drain pipe (not shown).

The drain pipe leads to the sewer. There is a deodorizer M on the top of the overflow tube 3.
4 is fitted.

The odor-proof lid 4 has a bowl-shaped cross section that opens downward, and its lower opening edge is located below the upper end of the overflow tube 3.

Seal water is stored in the trap body 1 at a water level that corresponds to the upper end of the overflow tube 3, and the lower part of the odor-proof lid 4 is submerged in the water seal, and the lower end opening of the odor-proof lid 4 is closed by the water seal. in a state.

The overflow tube 3 and the odor-proof lid 4 form a drainage passage that is vertically bent in a substantially S-shape in the trap body 1, and the passage is sealed from air by a water seal.

Therefore, the odor that has come up from the sewage through the drain pipe and up the overflow tube 3 is prevented from flowing into the trap body 1 by the water seal, and is stopped within the odor-proof lid 4.

A ventilation pipe 5 is inserted into the inside of the overflow tube 3 , and the upper part of the ventilation tube 5 extends upward from the upper end of the overflow tube 3 and is closed to the odor-proof lid 4 .
It is open inward.

The outer diameter of the ventilation pipe 5 is preferably smaller than the inner diameter of the overflow pipe 3.
It has an outer diameter of about /2 to 1n.

A support rod 6 is attached to the upper part of the ventilation pipe 5, which is placed on the upper end of the overflow pipe 3 and suspends and supports the ventilation pipe 5 substantially from the center shaft of the overflow pipe 3.

As shown in FIGS. 2 and 3, the support rod 6 is a rod extending horizontally in four directions from the outer periphery of the ventilation pipe 5 and having its tip bent downward at a right angle.

The upper end of the vent pipe 5 extends above the support rod 6, ensuring that the vent pipe 5 extends above the upper end of the overflow tube 3.

Reference numeral 7 denotes a stabilizing rod extending horizontally in four directions at the bottom of the vent pipe 5, which contacts the inner circumferential surface of the overflow tube 3 and allows the vent pipe 5 suspended by the support rod 6 to swing. is prevented.

Although the supporting rod 6 and the stabilizing rod 7 are formed integrally with the ventilation pipe 5 in the illustrated embodiment, they may be formed separately and attached to the outer periphery of the ventilation pipe 5. .

Further, the support rod 6 may not be a rod extending horizontally in the four directions shown in the figure, but may be a mesh or a perforated plate having slits or holes.

In short, any structure may be used as long as it can support the vent pipe 5 at the upper end of the overflow tube 3 and does not obstruct the flow of water from between the alternate trachea 5 and the inside of the overflow tube 3.

The vent pipe 5 is preferably configured to be detachable from the overflow tube 3 to facilitate cleaning, but the overflow tube 3 may be formed integrally with the overflow tube 3, or the vent tube 5 may be integrally formed as needed. The overflow tube 3 may be configured to be detachable from the trap body 1.

Thus, according to this invention, when a self-siphon phenomenon occurs due to the suction force caused by the flow of water during drainage, atmospheric pressure is transmitted to the interior of the deodorizing cover 4 through the drainage pipe by the ventilation pipe 5, so that the suction force of the water, that is, the deodorization is reduced. The negative pressure inside M4 is eliminated,
The self-siphon phenomenon is made to disappear.

Therefore, there is no risk that the sealed water will be sucked out by self-siphoning, the amount of sealed water will decrease, and the function of the sealed water to block the upward passage of odors will deteriorate or disappear.
It is possible to always ensure a water seal at a predetermined water level, and a stable odor prevention effect can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the drain trap, FIG. 2 is a longitudinal sectional view of the vent pipe, and FIG. 3 is a plan view of the vent pipe. 1... Trap body, 3... Overflow cylinder,
4...Odor-proof lid, 5...Vent pipe.

Claims (3)

[Scope of utility model registration request] (1) An overflow tube 3 with open upper and lower ends is erected in a cylindrical trap body 1 whose upper end is connected to a drain in a tank, floor, etc. and whose lower end is connected to sewage via a drain pipe, and the overflow tube This drainage trap is characterized in that a deodorizing lid 4 is fitted onto the upper part of the overflow tube 3, and a vent pipe 5, which partially extends upward from the upper end of the overflow tube 3, is inserted into the overflow tube 3. (2) The drain trap according to claim 1, wherein the vent pipe 5 is detachable. (3) The drain trap according to claim 1 or 2, characterized in that the ventilation pipe 5 is provided with a plurality of support rods 6 at the upper end supported by the upper end of the overflow tube 3.