JPH08226153A - Drain device for multistory building - Google Patents

Abstract

PURPOSE: To maintain the function of a trap sealing water upon the occurrence of fluctuation of the air pressure in a drain pipe. CONSTITUTION: The upper end of a branch pipe 7 under a trap is fitted with an air pressure adjusting device 10, and an exhaust port 15 is formed on the center of an inverted truncated cone type valve seat 14 laid on the upper end internal surface of the easing of the device 10. Furthermore, an intake port 20 is formed on the external surface of the casing, and a flexible intake valve 21 is provided on the internal surface of the casing at a position lower than the intake port 20. Also, the center hole of the valve 21 is coupled and kept close to the periphery of the seat 14 and, then, a valve spindle 18 is led through the port 15. The upper end of the spindle 18 is fitted with an exhaust valve 17, and the lower end thereof is fitted with a nonreturn valve. In addition, the valve 17 is kept close to a valve seat 16 at the upper end of the port 15 via the own weight thereof, and an annular valve seat 24 is laid on the internal surface of the casing above the valve 19.

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 high-rise buildings.

[0002]

2. Description of the Related Art In a conventional drainage system, a horizontal drainage horizontal pipe on each floor is connected to a vertical drainage pipe.

A trap is provided below the water receiving container installed in each room on each floor, and drainage flows through the trap from the drain fall pipe below to the drain horizontal run pipe and drain standpipe. To go.

The trap is normally sealed at a water depth of 50 to 100 mm in order to block the dirty odor gas in the drainage pipe.

However, non-quantitative drainage from any place
Inflow into the drainage pipe causes the following problems.

That is, in the upper floor, as the drainage flowing into the drainage stack falls at a high speed downwardly, the air pressure inside the drainage pipe is locally lowered, and the trap sealing water receiving negative pressure is sucked into the drainage pipe. Will be done.

Particularly, in a high-rise building, the above-mentioned problems are prominent, and the prediction thereof is difficult.

[0008]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to seal a trap of a water receiving container installed in each room on the upper floor when the above-mentioned rapid change in air pressure occurs. It is to solve the problem of receiving negative pressure and being sucked into the drainage pipe.

[0009]

In order to solve the above problems, as a first means, a branch pipe is provided below a trap provided in a drain pipe of a water receiving container, and a drain pipe is provided at an upper end of the branch pipe. An air pressure adjusting device is provided, the lower end of the casing of the air pressure adjusting device is communicated with the upper end of the branch pipe, and an exhaust hole is provided at the center of the inverted frustoconical valve seat provided on the inner surface of the upper end of the casing, and the outside of the casing is provided. An intake hole is provided on the side surface, the outer peripheral edge of the intake valve made of a flexible sheet is attached to the inner peripheral surface of the casing below the intake hole, and the center hole of the intake valve is fitted around the inverted frustoconical valve seat. The exhaust valve provided at the upper end of the exhaust hole provided in the inverted frustoconical valve seat penetrates through the valve rod, and the exhaust valve is brought into close contact with the valve seat at the upper end of the exhaust hole by its own weight. Non-return provided on the lower end of the rod It was adopted a structure in which are opposed to each other at a predetermined gap to an annular valve seat provided on the casing inner peripheral surface below the said flexible intake valve.

As a second means, in a drainage system of a high-rise building in which a drainage horizontal pipe is connected to a drainage vertical pipe, an upper part of an outer peripheral surface of a joint connecting the drainage vertical pipe and the horizontal drainage pipe Is connected to one end of an intake pipe bent in an inverted U shape, and a tapered valve seat having a lower diameter smaller than an upper diameter is provided on the inner peripheral surface of the other end of the intake pipe, and the center of the lower end of the valve seat is provided. An intake hole is provided, and a lightweight spherical valve is closely attached to the inner peripheral surface of the valve seat by its own weight, and an obstacle for preventing the spherical valve from coming out is provided above the valve seat with a required gap from the spherical valve. Adopted the configuration.

[0011]

In the normal state of the drainage system for a high-rise building according to the above-mentioned first means, the exhaust valve of the air pressure adjusting device is in close contact with the valve seat at the upper end of the exhaust hole by its own weight, and the center of the intake valve is The hole is fitted and closely fitted around the inverted frustoconical valve seat, so that a closed state is obtained.

Next, when the air pressure adjusting device receives a negative pressure due to the fluctuation of the air pressure in the drain pipe, the intake valve is pulled downward by the negative pressure, and the inner periphery of the center hole and the valve seat are A gap is created between the two, and external air is sucked through the gap.

The normal state of the drainage system for a high-rise building according to the second means is that the spherical valve in the intake pipe is in a sealed state by its close contact with the valve seat at the upper end of the intake hole by its own weight. Become.

Next, in the same manner as above, when the intake pipe receives a negative pressure due to the fluctuation of the air pressure in the drain pipe, the spherical valve is pulled upward by the negative pressure and floats to open the intake hole. To do.

As a result, the external air is sucked from the intake hole.

[0016]

Embodiments of the first means of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the drainage system of a high-rise building has a falling pipe 3, a lateral running pipe 4, and a vertical pipe 5 via a trap 2 below a water receiving container 1 installed in each room on each floor. It is connected to the.

The trap 2 is sealed with water at an appropriate depth.

A branch pipe 7 is connected to the falling pipe 3 below the trap 2, and the lower end of the casing lower part 11 of the air pressure adjusting device 10 is connected to the upper end of the branch pipe 7 as shown in FIG. .

The branch pipe 7 is connected to the falling pipe 3 through a flow rate adjusting pipe 8 provided with an inner wall 9 extending downward as shown in FIG.

As shown in FIG. 2, the air pressure adjusting device 10 includes a lower end of the upper casing 12 and a lower casing 1.
The upper end of 1 is attached by a flange connection.

An inverted frustoconical valve seat 14 is provided on the inner surface of the upper end of the casing upper portion 12, and an exhaust hole 15 is provided at the center of the inverted frustoconical valve seat 14.

A plurality of intake holes 20 are provided on the outer surface of the casing upper portion 12.

The outer peripheral edge of the intake valve 21 made of a flexible sheet is integrally attached between the flange portions 13 of the casing upper portion 12 and the casing lower portion 11.

A hole 22 is provided at the center of the intake valve 21, and the circumference of the center hole 22 is fitted and closely fitted around the inverted frustoconical valve seat 14.

The valve stem 1 is provided with a valve seat 16 at the upper end of the exhaust hole 15 of the inverted truncated cone valve seat 14 and an exhaust valve 17 at the upper end.
8 penetrates the exhaust hole 15, and the exhaust valve 17 is in close contact with the valve seat 16 at the upper end of the exhaust hole 15 by its own weight.

A check valve 19 is provided at the lower end of the valve rod 18. As shown in FIG. 2, the check valve 19 has a disc shape or the like.

The flange portion 13 of the casing lower portion 11
A projecting portion 23 is provided on the inner peripheral surface of, and an annular valve seat 24 is provided on the lower surface of the projecting portion 23.

The annular valve seat 24 and the check valve 19 are provided so as to face each other with a required gap.

Next, an embodiment of the second means will be described with reference to the accompanying drawings.

As shown in FIG. 3, the drainage system of a high-rise building has a falling pipe 3, a lateral running pipe 4, and a vertical pipe 5 via a trap 2 below a water receiving container 1 installed in each room on each floor. The horizontal running pipe 4 is connected to the vertical pipe 5 via a joint 6.

An upper end of the outer peripheral surface of the joint 6 is connected to one end of an intake pipe 30 bent in an inverted U shape.

As shown in FIG. 4, a tapered valve seat 31 having a lower diameter smaller than the upper diameter is provided on the inner peripheral surface of the other end of the intake pipe 30.

An intake hole 32 is provided at the center of the lower end of the tapered valve seat 31, and a lightweight spherical valve 33 is attached to the inner peripheral surface of the tapered valve seat 31 by its own weight.

Above the tapered valve seat 31, the spherical valve 3 is provided.
An obstacle 34 is provided with a required gap from 3.
The obstacle 34 is for preventing the spherical valve 33 from coming out, and various kinds such as a plate shape, a lattice shape, and a mesh shape can be selected.

Next, the operation of the first means will be described.

In the normal state of the drainage system for a high-rise building by the first means, as shown in FIG. 2, the exhaust valve 17 of the air pressure adjusting device 10 comes into close contact with the valve seat 16 at the upper end of the exhaust hole 15 by its own weight, The center hole 22 of the intake valve 21 is fitted and closely fitted around the inverted frustoconical valve seat 14 to be in a sealed state.

Next, when the air pressure adjusting device 10 receives a negative pressure, the intake valve 21 is pulled downward by the negative pressure, and the intake valve 21 is pulled between the inner periphery of the center hole 22 and the inverted frustoconical valve seat 14. A gap is created, and external air is sucked through the gap.

Next, when the air pressure adjusting device 10 receives positive pressure from the compressed air, the check valve 19 is pushed up by the positive pressure, and the exhaust valve 17 integrated with the check valve 19 is provided at the upper end of the exhaust hole 15. Move away from the valve seat 16.

As a result, compressed air is discharged from the exhaust hole 17.

Further, when the drainage flows back through the drainage pipe, the check valve 19 is pushed up by the backflowing water, and the check valve 19 comes into close contact with the annular valve seat 24.

Further, in the normal state of the drainage system for a high-rise building by the second means, as shown in FIG. 4, the spherical valve 33 in the intake pipe 30 is attached to the valve seat 31 at the upper end of the intake hole 32 by its own weight. By closely contacting, it becomes a sealed state.

Next, when the intake pipe 31 receives a negative pressure, the spherical valve 33 is pulled upward by the negative pressure and floats to open the intake hole 32.

As a result, the outside air is sucked from the intake hole 32.

At this time, since the spherical valve 33 comes into contact with the obstacle 34, it does not come out of the intake pipe 30.

[0046]

As described above, according to the first means of the present invention, when the air pressure adjusting device receives a negative pressure due to the fluctuation of the air pressure in the drain pipe, the intake valve is lowered by the negative pressure. The trapped water can be prevented from being sucked into the drain pipe, because a gap is created between the circumference of the central hole and the valve seat, and the external air is sucked from the gap.

According to the second means, when the intake pipe receives a negative pressure due to air fluctuation in the drain pipe, the spherical valve floats upward by the negative pressure and opens the intake hole. As a result, the external air is sucked from the intake hole, so that it is possible to prevent the trap sealing water from being sucked into the drain pipe in the same manner as described above.

Further, according to the first means, when the air pressure adjusting device receives a positive pressure by the compressed air, the check valve is pushed up by the positive pressure and the compressed air is discharged from the exhaust hole. Therefore, it is possible to prevent the trap water from being blown out toward the water receiving container.

In addition, when drainage flows back through the drainage pipe, the check valve is pushed up by the backflow water, and the check valve comes into close contact with the annular valve seat. Therefore, shut off the backflow water. You can

According to the second means, since the intake pipe is installed at the joint of the drainage stack pipe, the number of installations can be reduced as compared with the case where each trap is installed.

[Brief description of drawings]

FIG. 1 is a partially omitted sectional view showing an example of a drainage device for a high-rise building.

FIG. 2 is a partially enlarged sectional view of the above.

FIG. 3 is a schematic view showing another example of the above.

FIG. 4 is a partially enlarged sectional view of the above.

[Explanation of Codes] 1 Water receiving container 2 Trap 3 Falling pipe 4 Lateral running pipe 5 Standing pipe 6 Joint 7 Branch pipe 8 Flow rate adjusting pipe 9 Inner wall 10 Air pressure adjusting device 11 Casing lower part 12 Casing upper part 13 Flange part 14 Reverse Frustum-shaped valve seat 15 Exhaust hole 16 Valve seat 17 Exhaust hole 18 Valve rod 19 Check valve 20 Intake hole 21 Intake valve 22 Center hole 23 Projection 24 Annular valve seat 30 Intake pipe 31 Tapered valve seat 32 Intake hole 33 Spherical valve 34 Obstacle

Claims (2)

[Claims] 1. A branch pipe is provided below a trap provided in a drain pipe of a water receiving container, a drain pipe air pressure adjusting device is provided at an upper end of the branch pipe, and a casing lower end of the air pressure adjusting device is provided at the branch pipe. And an exhaust hole at the center of the inverted frustoconical valve seat provided on the inner surface of the upper end of the casing, and an intake hole on the outer surface of the casing,
The outer peripheral edge of the intake valve made of a flexible sheet is attached to the inner peripheral surface of the casing below the intake hole, and the center hole of the intake valve is fitted and closely fitted around the inverted frustoconical valve seat to form the inverted frustoconical shape. A valve rod provided with an exhaust valve at the upper end of the exhaust hole provided in the valve seat is penetrated, and the exhaust valve is brought into close contact with the valve seat at the upper end of the exhaust hole by its own weight, and the reverse provided at the lower end of the valve rod. A drainage device for a high-rise building, wherein a stop valve is opposed to an annular valve seat provided on an inner peripheral surface of a casing below the flexible intake valve with a required gap. 2. In a drainage system for a high-rise building, in which a horizontal drainage pipe is connected to a vertical drainage pipe, an inverted U-shape is bent over the outer peripheral surface of the joint connecting the vertical drainage pipe and the horizontal drainage pipe. One end of the intake pipe is communicated, a tapered valve seat having a lower diameter smaller than the upper diameter is provided on the inner peripheral surface of the other end of the intake pipe, and an intake hole is provided at the center of the lower end of the valve seat. A drainage device for a high-rise building in which a lightweight spherical valve is closely attached to the inner peripheral surface of the valve seat by its own weight, and an obstacle for preventing the spherical valve from coming out is provided above the valve seat with a required gap from the spherical valve. .