JPH0874303A - Drainage of building - Google Patents

Abstract

PURPOSE: To enable the water to flow down through a cross drain pipe smoothly by providing an air current induction space, an air-flow circulation section and a returning vent pipe to a drainage connecting the cross drain pipe to the lower part of a drainage down pipe through a leg curve. CONSTITUTION: When the water flowing in a down-pipe 2 from a drain pipe 1 is leaked through the lower end of the down-pipe 2, air of an air current induction space 6 is induced, and the space 6 and the neighborhood of an air- flow circulation section 7 are turned to negative pressure. After that, the water flowing in a cross drain pipe 4 through a curve 3 brings about a jumping phenomenon, however, air compressed in the cross drain pipe 4 flows in a returning vent pipe 9 from an air-flow starting point 8, and it is induced with negative pressure in the vicinity of the air-flow circulation section 7 and is returned to the inside of a leg curve 3 again. Then, the air is circulated through the returning vent pipe 9, and the leakage of compressed air upward of the down- pipe 2 and downstream of the cross drain pipe 4 is prevented. Accordingly, the water an be made to flow down from the cross drain pipe 4 smoothly without giving any influence to upper floor fixtures.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage system for buildings.

[0002]

2. Description of the Related Art In high-rise buildings such as condominiums and hotels, as shown in FIG. 3, drain pipes 1 connected to appliances on each floor and each room are installed in the vertical direction of the building. It is connected to a drainage vertical pipe 2 which is piped, and a lateral running pipe 4 is connected to the lower end of the vertical pipe 2 via a leg bent pipe 3.

The drainage flowing into the vertical pipe 2 drops at a high speed due to the acceleration of gravity, and when it reaches the vicinity of the leg bent pipe 3, it is greatly decelerated by the air resistance. However, in the leg bent pipe 3, when it changes its direction toward the lateral running pipe 4, it jumps violently due to inertia and turns along the inner wall surface.
This phenomenon is generally called “jumping phenomenon” (in the figure, a thick arrow indicated by a symbol conceptually indicates the phenomenon).

On the other hand, the air in the lateral running pipe 4 collides with the flowing drainage while causing a jumping phenomenon and is strongly compressed, and when the compression reaches the limit, it rushes through the drainage in the opposite direction. The thin arrow indicated by the symbol b indicates the repulsive condition of the compressed air.

At this time, the air is fired while being surrounded by the detergent and the surfactant in the drainage, and the bubbles rise in the rising pipe 2 and break the sealing water of the equipment on the upper floors and overflow.

On the other hand, on the downstream side of the laterally running pipe 4, air flows into another pipe which is not drained in search of an escape place, and overflows by breaking the sealing water of the trap of the device on the upper floor. Also,
When the passage of the waste water is completed, the trap water in the trap is sucked, which causes an unpleasant noise.

In order to solve such a problem, as shown by the alternate long and short dash line in FIG.
It is known to provide the ventilation pipe 5 in the upper part of the. This ventilation pipe 5 is intended to alleviate air compression at the lowest part of the vertical pipe 2.

However, the high-speed falling water in the vertical pipe 2 is subjected to severe air resistance upstream of the leg curved pipe 3 to generate a mixed fluid, and the mixed fluid is blown into the ventilation pipe 5 (see the one-dot chain line arrow in the figure). ), It came to occlude this in a short period of time,
The intended purpose of mitigating air compression cannot be achieved.

There is also a means for raising a ventilation pipe on the laterally running pipe 4. According to this, the fluctuation of the air pressure in the lateral running pipe 4 becomes small, but the speed of the drainage falling in the vertical pipe 2 increases, the sealing water of the drain trap of the equipment on the upper floor is sucked, and the sealing function is lost. There is a problem.

The present invention rationally solves the above problems, and the drainage flowing from the drainage standpipe into the lateral running pipe is
The objective is to enable smooth horizontal running and discharge to the downstream of the pipe without affecting the equipment on the upper floors.

[0011]

In order to achieve the above-mentioned object, according to the present invention, as shown in FIG. 1, the lower end portion of the drainage vertical pipe 2 is connected to the upper end portion of a leg bent pipe 3 having a larger diameter than that. Insert into
The upper end of the leg bend pipe 3 and the outer peripheral surface of the stand pipe 2 are closed to form an air flow guide gap 6 between the outer periphery of the insertion portion of the stand pipe 2 and the inner peripheral surface of the leg bend pipe 3. To do. Further, on the side surface of the upper end portion of the leg bent pipe 3, a ventilation circulating portion 7 communicating with the air flow guide gap 6 is formed.
To provide.

A lateral running pipe 4 is connected to the lower end of the leg bent pipe 3 and a ventilation starting point 8 is provided in the lateral running pipe 4. Between the ventilation starting point 8 and the ventilation circulating part 7. A return ventilation pipe 9 is provided. The ventilation starting point portion 8 is provided within a range of 2 to 3 m from the lower end of the leg curved pipe 3.

[0013]

According to the above-mentioned structure, when the drainage that has entered the standpipe 2 from the drainage pipe 1 escapes from the lower end of the standpipe 2, the air in the airflow-inducing gap 6 is attracted, and the gap 6 and the ventilation recirculation flowing therethrough. A negative pressure is applied to the vicinity of the part 7. The drainage flowing into the lateral running pipe 4 through the leg curved pipe 3 causes a jumping phenomenon as in the conventional case, but the air compressed in the lateral running pipe 4 flows from the ventilation start point 8 to the return ventilation pipe 9. It enters and is pulled by the negative pressure in the vicinity of the ventilation circulation portion 7 and returns to the leg curved pipe 3 again. Thereafter, the air circulates through the return ventilation pipe 9 to prevent the compressed air from escaping above the stand pipe 2 and downstream of the lateral running pipe 4.

Since the lower end of the stand pipe 2 is inserted so as to reach below the ventilation circulation part 7, the stand pipe 2
It is possible to prevent the mixed fluid of the waste water and the air discharged from the air blown into the return ventilation pipe 9.

[0015]

EXAMPLE FIG. 2 shows an example. In this case, the inner diameter of the upper end portion of the leg bent tube 3 is formed to a diameter that matches the outer diameter of the stand tube 2 inserted into the upper end portion, and the leg portion is formed. Flange 1 of bent tube 3
The packing 12 attached to the vertical pipe 2 inside 1 is tightened by a push ring 13 to close it.

A branch joint portion 14 projecting laterally is provided on the side surface of the leg bent pipe 3, and constitutes the above-mentioned ventilation circulation portion 7.

At a position lower than the branch joint pipe 12, an airflow guide gap 6 is provided between the inner peripheral surface of the leg bent pipe 3 and the outer peripheral surface of the stand pipe 2.

A relay pipe 15 having a length of about 2 to 3 m is connected to the lower end of the leg bent pipe 3, and a lateral running main pipe 16 is further connected to the relay pipe 15. The relay pipe 15 and the laterally running main pipe 16 constitute the laterally running pipe 4 described above.

An upward branch joint portion 17 is provided at a portion of the laterally running main pipe 16 near the relay pipe 15, whereby the above-described ventilation start point portion 8 is constituted. This branch joint 1
7 and the branch joint part 4 described above, respectively, joint band 1
The return ventilation pipe 9 is connected by 9 and 20.

The reason why the length of the relay pipe 15 is set to be 2 to 3 m is that the vicinity of the end portion of the relay pipe 15 is the portion where the air pressure fluctuation is most remarkable, and the air in that portion is returned. Is.

[0021]

Since the present invention is as described above, the compressed air in the laterally running pipe is returned to the airflow guiding gap at the lower end of the vertical pipe, so that the compressed air in the laterally running pipe penetrates the drainage. It will not enter the standpipe or traverse the other pipe downstream of the pipe. Therefore, there is no effect on the equipment on the upper floors, and the drainage runs horizontally and flows down the pipe.

Further, since the lower end of the vertical pipe is inserted in the airflow guide gap so as to be located at a position lower than the ventilation circulation part, the mixed fluid of the waste water and the gas discharged from the vertical pipe is blown into the return ventilation pipe. And smooth the return and circulation of compressed air.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of the present invention.

FIG. 2 is a sectional view of an embodiment of the present invention.

FIG. 3 is a schematic view of a conventional example.

[Explanation of symbols]

 1 Drain pipe 2 Vertical pipe 3 Leg bend pipe 4 Lateral running pipe 5 Ventilation pipe 6 Airflow guide gap 7 Ventilation return part 8 Ventilation start point 9 Return ventilation pipe 11 Flange 12 Packing 13 Push ring 14 Branch joint part 15 Relay pipe 16 Horizontal Running main 17 Branch joints 19 and 20 Joint band

Claims (2)

[Claims] 1. In a drainage device for a building, wherein a horizontal running pipe is connected to a lower end of a drainage vertical pipe through a leg curved pipe, a lower end of the vertical pipe is inserted into an upper end of the leg curved pipe, An airflow guide gap is provided between the two, a ventilation circulation part communicating with the airflow guide gap is provided at the upper end of the leg bent pipe, and a ventilation start point provided in the laterally running pipe and the ventilation circulation part are provided. A drainage system for buildings, which is equipped with a return ventilation pipe. 2. The ventilation starting point is 2 from the lower end of the leg bent pipe.
The drainage system for a building according to claim 1, wherein the drainage system is provided within a range of 3 m.