JPH0826564B2 - Drain pipe device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a drainage pipe device used for a high-rise building or the like.

(Prior Art) FIG. 5 relates to a conventional example. A vertical main pipe 1 ', a horizontal branch pipe 2'connected to an upper and lower midway portion of the vertical main pipe 1', and a horizontal pipe connected to a lower end of the vertical main pipe 1 '. A main pipe 3'is provided, a horizontal drain pipe 2'is connected to a drainage device 4 ', a horizontal main pipe 3'is connected to a chamber basin 5', and drainage from the drainage device 4'is a horizontal branch pipe 2 ', a vertical main pipe 1'. A drain pipe device is shown which sequentially flows through the main pipe 3'and the horizontal main pipe 3 ', and is drained to the hall 5'. Incidentally, 13 'is a top vent of the vertical main pipe 1'.

(Problems to be Solved by the Invention) In a conventional drainage pipe device, when drainage water containing a detergent or the like is caused to flow, as shown in FIG. 6, bubbles 8'floating on the drainage surface 9 in the horizontal main pipe 3'drain the drainage water. A state in which the space above the surface 9 is closed, that is, a so-called bubble plug phenomenon may occur. this is,
This is because the horizontal main pipe 3'is likely to occur at a bent portion or an insufficiently sloped portion, and the drainage flow velocity decreases at these portions, so that the bubble 8'does not flow and stagnates.

As such, the upper portion of the drainage in the horizontal main pipe 3'is the bubble 8 '.
If it is blocked by, the air that flows with the drainage from the upstream of the closed portion is blocked by the closed portion, the internal pressure of the drain pipe rises, and the trap water for the drainage device 4'is blocked. There was a problem that it was bounced up and bubbles containing a strange odor were ejected from the trap.

 An object of the present invention is to solve the above problems.

(Means for Solving Problems) A feature of the first invention of the present application for solving the problems of the prior art is that the lateral branch pipe 2 to which the drainage device 4 is connected is connected.
Includes a vertical main pipe 1 connected to a midway portion, and a horizontal main pipe 3 having one end connected to the lower end of the vertical main pipe 1 and the other end connected to the chamber basin 5, and flows into the horizontal main pipe 3 inside. In a drainage pipe device provided with a foam plug generation part 10 such as a bent portion which is likely to be blocked by drainage and bubbles 8 floating on the water surface 9, one end of the horizontal main pipe 3 upstream of the foam plug generation part 10 is provided. While being connected to the upper part of the pipe wall, the other end is provided with an upper part of the horizontal main pipe 3 on the downstream side of the foam plug generating part 10 or a ventilation pipe 7 connected to the chamber basin 5. is there.

The second invention of the present application is characterized in that, in addition to the features of the first invention, a connection opening of the ventilation pipe 7 to the horizontal main pipe 3 is provided when the internal pressure of the vertical main pipe 1 exceeds a permissible value. The point is that an air generator 11 is provided that is activated to eliminate the air bubbles 8 that block the air flow and creates an air flow in the ventilation pipe 7.

(Operation) In the first invention of the present application, even if the space above the drainage surface 9 is blocked by the bubbles 8 in the foam plug generation portion 10 such as the bent portion in the horizontal main pipe 3, it is accompanied by the drainage from the upstream thereof. The air flow reaches the downstream of the closed position by the air bubbles 8 through the ventilation pipe 7 and is discharged to the parlor basin 5 together with the drainage, so that the internal pressure of the drainage pipe is prevented from becoming excessive.

Moreover, the above-mentioned ventilation pipe 7 has a foam plug at its downstream end.
Upper part of the pipe wall in the horizontal main pipe 3 on the downstream side of 10, or
While connected to the chamber basin 5, especially on the upstream side as well
It is connected to the upper part of the pipe wall of the horizontal main pipe 3 on the upstream side of 10. That is, since the bubble plug phenomenon is less likely to occur on the upstream side of the horizontal main pipe 3, for example, in the vicinity of the vertical main pipe where the flow velocity is high, the upstream end of the ventilation pipe 7 is also connected to the upper portion of the horizontal main pipe 3. With such a configuration, the connection structure when the ventilation pipe 7 is provided can be made simpler.

That is, for example, it is conceivable to connect the upstream end of the ventilation pipe to the lower end side of the vertical main pipe, but in such a structure, drainage flowing down along the inner wall surface of the vertical main pipe or solid matter in the drainage flows into the ventilation pipe. In order to prevent the closed state due to the inflow, it is necessary to make a complicated structure such as providing a projection surrounding the upper peripheral side of the connection opening of the ventilation pipe on the inner surface of the vertical main pipe. In addition, if the horizontal main pipe piping space below the floor slab is narrow, it is not possible to increase the protruding length of the vertical main pipe to this area. Connecting the ends becomes difficult. As a result, it is necessary to bend the upstream end of the ventilation pipe that is arranged in parallel with the horizontal main pipe upward, to penetrate the floor slab upward, and to connect it to the vertical main pipe on the floor slab. Become. In this case, it is necessary to open a through hole for the ventilation pipe in the floor slab, which complicates the construction work and increases the piping space on the floor to narrow the effective space of the building.

On the other hand, since the ventilation pipe 7 in the present application has its upstream end also connected to the upper part of the pipe wall of the horizontal main pipe 3, there is no possibility that drainage or solid matter in the drainage will flow into the ventilation pipe. There is no need to add any additional configuration to prevent blockage by. Further, since it is not necessary to have a structure such as penetrating the floor slab, it is possible to perform piping with a simpler structure without narrowing the effective building space.

According to the second invention of the present application, in addition to the operation of the first invention,
The following effects are achieved.

That is, when the bubble pool generated in the foam plug generation part 10 in the horizontal main pipe 3 increases toward the upstream side, the upstream end of the ventilation pipe 7 connected to the horizontal main pipe 3 is blocked by the bubbles 8. There is a risk. Then, the air flow accompanying the drainage is blocked, and the drain pipe internal pressure rises. In such a case, if the internal pressure of the drain pipe exceeds the allowable value, the air flow generator
11 is activated, which causes air bubbles 8 to block the upstream end of the ventilation pipe.
Is eliminated. As a result, a communication state between the upstream side and the downstream side through the ventilation pipe 7 is secured, and an increase in the drain pipe internal pressure is suppressed.

(Example) Hereinafter, the Example of this invention is described based on drawing.

In FIG. 1 and FIG. 2, reference numeral 1 is a vertical main pipe for drainage, which is provided in a building, and a horizontal branch pipe 2 is provided at an upper and lower middle portion thereof.
Is connected, and the horizontal main pipe 3 is connected to the lower end. Although not shown, the lateral branch pipes 2 are vertically connected to the vertical main pipe 1 in plural numbers.

A drainage device 4 such as a washbasin or a toilet is connected to the lateral branch pipe 2 via a water sealing trap (not shown).

The horizontal main pipe 3 is gradually inclined downward from the vertical main pipe 1 and is bent in the middle to be connected to the chamber basin 5. As a result, the drainage from the drainage device 4 is a horizontal branch pipe 2 and a vertical main pipe 1.
Then, it flows through the horizontal main pipe 3 in sequence and is drained to the parlor basin 5, from which it reaches the sewer pipe 6.

7 is a ventilation pipe, one end of which is located near the vertical main pipe 1 and is connected to the upper part of the pipe wall of the horizontal main pipe 3 as shown in FIG. 3, and the other end of the ventilation pipe is shown in FIG. 2, in the vicinity of the chamber basin 5 in FIG. 2, this is also connected to the upper part of the pipe wall of the horizontal main pipe 3 as shown in FIG. Here, as shown in FIG. 3, the position of each end of the ventilation pipe 7 is such that, in the horizontal main pipe 3, a bubble plug is apt to be occluded above the drainage surface 9 due to bubbles 8 caused by detergent in the drainage. Part 10 is set as the standard. That is, one end of the ventilation pipe 7 is located upstream of the foam plug generation unit 10 and the other end of the ventilation pipe 7 is located downstream thereof. Here, the foam plug generation portion 10 in which the closed state due to the air bubbles 8 is likely to occur is a portion where the bent portion of the horizontal main pipe 3 or the gradient is insufficient and the drainage flow velocity decreases. Therefore, since the closed state due to the bubbles 8 does not occur in the portion where the flow velocity is high in the vicinity of the vertical main pipe 1, one end of the ventilation pipe 7 is connected to the vicinity of the vertical main pipe 1.
It is preferable that the other end of the ventilation pipe 7 is connected to the parlor basin 5 as shown in FIG. 1, but the horizontal main pipe 3 is increased in the vicinity of the parlor basin 5 to increase the drainage flow velocity to increase the flow rate of bubbles. If it is prevented that the closed state by 8 occurs, it may be connected to the upper portion of the horizontal main pipe 3 as shown in FIG.

Then, as shown in FIG. 4, in the middle of the ventilation pipe 7, by blowing air toward the downstream of the ventilation pipe 7, a blower (air flow generation) that generates an air flow from the upstream side to the downstream side in the ventilation pipe 7 is generated. 11) is provided. This blower 11
It is connected to the pipe internal pressure detection sensor 12 at the upstream end of the horizontal main pipe 3 and is activated for a certain period of time when the drain pipe internal pressure is equal to or higher than an allowable value. Here, the allowable value of the drainage pipe internal pressure is set in advance in consideration of the safety factor, by previously obtaining the pressure at the time of inconvenience that the sealing water trap of the drainage device 4 is flipped up due to the increase of the pipe internal pressure.

According to the above configuration, even if the closed state due to the air bubbles 8 occurs in the horizontal main pipe 3, as shown in FIG. 3, the air flow accompanying the drainage reaches the chamber basin 5 from the ventilation pipe 7 and the drain pipe internal pressure is increased. Is prevented from rising excessively, there is no inconvenience such as splashing of the sealing water trap, and the odor caused by drainage can be discharged to the chamber basin 5. Further, as shown in FIG. 4, when the bubble pool becomes large and the upstream end of the ventilation pipe 7 is blocked, and the drain pipe internal pressure rises, the blower 11 is activated as described above. As a result, an air flow from the upstream side to the downstream side is generated in the ventilation pipe 7, the bubbles 8 blocking the upstream end of the ventilation pipe 7 are sucked up into the ventilation pipe 7, and the bubbles 8 blocking the upstream end are removed. become. As a result, a communication state between the upstream side and the downstream side through the ventilation pipe 7 is secured, and the drain pipe internal pressure is prevented from rising excessively. The air flow generator 11
May use an aspirator instead of a blower. Further, the start-up time of the blower 11 is set to a time sufficient for the bubbles 8 in the foam plug generation unit 10 to flow thereafter and be discharged from the chamber basin 5.
It is determined in advance by experiments or the like.

As shown in FIG. 5, it is conceivable to provide a ventilation pipe 7'parallel to the vertical main pipe 1'and connect its lower end to the lower end of the vertical main pipe 1 ', but only the storage space for the ventilation pipe 7'is constructed. There is a drawback that the effective space of the object is narrowed, whereas the present invention has no such drawback.

(Effect of the Invention) According to the first invention of the present application, even if the space above the drainage surface in the horizontal main pipe is blocked by air bubbles, the airflow associated with drainage is discharged from the ventilation pipe to the hall and the drainage pipe internal pressure becomes excessive. Therefore, it is possible to prevent inconveniences such as flipping up the water trap of the drainage device. Moreover, since the upstream end of the ventilation pipe is connected to the pipe wall upper part of the horizontal main pipe upstream of the foam plug generation part, the effective space of the building can be narrowed compared to the structure in which it is connected to the lower end side of the vertical main pipe, for example. Without, it can be piped with a simpler structure.

According to the second invention of the present application, in addition to the effect of the first invention, even when the bubble accumulation increases from the foam plug generating portion to the upstream side and the upstream end of the ventilation pipe is blocked by the bubbles, the airflow generator can be used. Bubbles blocking the upstream end of the ventilation pipe are removed, and the communication state between the upstream side and the downstream side through the ventilation pipe is secured, so that the rise in the drain pipe internal pressure is suppressed.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a drainage pipe device according to an embodiment of the present invention, FIG. 2 is a structural explanatory view of a drainage pipe device according to a different embodiment, FIG. 3 is a sectional view for explaining the same action, and FIG. FIG. 5 is a sectional view for explaining the operation different from that of FIG. 3, FIG. 5 is an explanatory view of the configuration of a drainage pipe device according to a conventional example, and FIG. 6 is an explanatory view of a closed state due to bubbles in a horizontal main pipe. 1 ... Vertical main pipe, 2 ... Horizontal branch pipe, 3 ... Horizontal main pipe, 4 ... Drainage equipment,
5 ... Hall, 7 ... Vent pipe, 8 ... Bubbles, 9 ... Drainage surface, 10 ...
Bubble plug generator, 11 ... Blower (air flow generator).

Claims (2)

[Claims] 1. A vertical main pipe 1 in which a horizontal branch pipe 2 to which a drainage device 4 is connected is connected to an intermediate portion, and a horizontal main pipe 1 whose one end is connected to a lower end of the vertical main pipe 1 and whose other end is connected to a chamber basin 5. The main pipe 3 is provided, and the horizontal main pipe 3 has wastewater flowing therein and the water surface 9 thereof.
In a drainage pipe device provided with a foam plug generation part 10 such as a bent portion that is likely to be closed due to bubbles 8 floating in the inside, one end is connected to the upper part of the wall of the horizontal main pipe 3 on the upstream side of the foam plug generation part 10. On the other hand, the other end has the foam plug generation unit 10
A drainage pipe device, characterized in that a ventilation pipe 7 connected to the upper pipe wall of the horizontal main pipe 3 on the downstream side or to the chamber basin 5 is provided. 2. A vertical main pipe 1 in which a horizontal branch pipe 2 to which a drainage device 4 is connected is connected midway, and a horizontal main pipe 1 whose one end is connected to a lower end of the vertical main pipe 1 and whose other end is connected to a chamber rod 5. The main pipe 3 is provided, and the horizontal main pipe 3 has wastewater flowing therein and the water surface 9 thereof.
In a drainage pipe device provided with a foam plug generation part 10 such as a bent portion that is likely to be closed due to bubbles 8 floating in the inside, one end is connected to the upper part of the wall of the horizontal main pipe 3 on the upstream side of the foam plug generation part 10. On the other hand, the other end has the foam plug generation unit 10
A ventilation pipe 7 connected to the upper part of the wall of the horizontal main pipe 3 on the downstream side or to the hall basin 5 is provided. When the internal pressure of the vertical main pipe 1 exceeds the allowable value, the ventilation pipe 7 is provided. A drainage pipe provided with an airflow generator 11 that is activated to eliminate air bubbles 8 that block the connection opening of the ventilation pipe 7 to the horizontal main pipe 3 and generate an airflow in the ventilation pipe 7. apparatus.