KR20210055569A - Drainage system using pressure relief device for drain pie - Google Patents

Abstract

The present invention relates to a drainage system using a pressure relief device for a drain pipe. The drainage system using a pressure relief device for a drain pipe comprises: a standpipe extended from the ground in the vertical direction of a multi-story building or an apartment house to discharge wastewater and domestic sewage produced in the multi-story building or the apartment house to the outside; a drain pipe crossing the standpipe to communicate with the standpipe to allow the wastewater and the domestic sewage entering from the standpipe to reach a septic tank or a pipe termination point; an elbow joint pipe connecting the standpipe and the drain pipe; and a pressure relief unit which is connected to the standpipe, and absorbs and relieves the pressure generated when the wastewater and the domestic sewage produced in the multi-story building or the apartment house are mixed with air to flow into the standpipe. The drainage system using a pressure relief device for a drain pipe can absorb and relieve the pressure generated when wastewater and domestic sewage produced in a multi-story building or an apartment house are mixed with air to flow into a drain pipe by using a pressure relief device for a drain pipe.

Description

Drainage system using pressure relief device for drain pie

The present invention relates to a drainage system using a pressure extinguishing device for a drain pipe, and more particularly, a pressure generated when sewage and household sewage generated in a multi-storey building or apartment house are mixed with air and flow into a vertically standing drainage pipe. It relates to a drainage system using a pressure extinguishing device for a drain pipe to absorb and extinguish.

The purpose of a drainage system installed in a building is to deliver wastewater from sanitary facilities such as toilets, washbasins and sanitary appliances to the sewers normally installed in the basement of the building.

The drainage system of a multi-storey building consists of a branch pipe for delivery to a vertical stack using wastewater connectors for each of the sanitary facilities present on each floor, and at least one vertical stack extending through the floor of each floor. We have. In addition, the stack, branch pipe or each individual sanitary installation may have a negative pressure device or a positive pressure device, a positive air pressure damping device.

Water traps or water seals are generally used for most sanitary equipment. The purpose of the water trap or water seal is to prevent contaminated air from the sewer from entering the surrounding space or living space, and is composed of U.P-shaped or bottle-shaped housings.

In addition, a water trap or water seal is connected to each of the sanitary devices, and a certain amount of water remains in place to block air from the stack or sewer.

The flush toilet has a water trap installed in the fixture itself. Under certain conditions, such as negative or positive air pressure conditions, the water traps may collapse, which means that there is not enough water left in place to ensure blockage from the discharge pipe, so that the contaminated air from the sewer and the living space It means to enter into.

Therefore, ventilation of the drainage system is important to prevent the air pressure difference in the system, and in most systems, ventilation pipes using piping pipes and air admittance valves (AAV) are used.

The vent valve allows air to enter the drainage system through a one-way air valve when the sanitary device is activated and water flows through the pipe. When the wastewater column falls through the vertical stack, it entails airflow, which creates local suction or negative pressure.

These are transmitted through the network and can induce a siphon action in the facility water trap chambers. To compensate for this negative pressure, the membrane of the vent valve is temporarily raised to allow ambient air to enter the drainage system.

The degree of this pressure fluctuation is determined by the fluid volume of the discharged water. Excessive negative air pressure can draw water from the water seal of the sanitary facility's traps if the vent valve is not present.

On the other hand, if the air pressure in the drainage is suddenly higher than the surroundings, this positive transient causes wastewater and air to be pushed to the sanitary facility, drying or destroying the water in the trap chamber, resulting in health and hygiene problems.

Therefore, various prior art techniques have been proposed for the management of drainage pipes used in multi-storey buildings or apartment houses.

The proposed prior art is a drain pipe line for preventing backflow of an apartment house (Korean Patent Registration No. 10-1401581), which has a drainage hole and a flat plate cover arranged parallel to the floor with an arc plate on the lower side. The first casing is buried at the lower end to hold the cover, the second casing is assembled at the lower end of the first casing, and is disposed in the space formed between the bottom surfaces of the first and second casings to discharge sewage or It includes an opening and closing ball for preventing a backflow phenomenon, and a drain pipe for discharging sewage flowing in through the drain hole of the flat cover to the outside.

In the prior art, a filter plate is installed in the first casing to form a drain pipe line so that foreign matter can be easily separated, and by installing an opening and closing ball in the space between the first and second casings, the discharge of domestic sewage is reduced. It is easy and has the advantage of fundamentally blocking the backflow phenomenon, but in this case, too, there is a disadvantage in that the pressure (static pressure) in the pipe cannot be extinguished.

Korean Registered Patent Publication No. 10-1401581: Drainage pipe line for preventing backflow in apartment houses

The present invention was created to solve the above problems, and the direction opposite to the direction of the fluid flow (reverse flow) when the fluid drained from the drainage pipe of a multi-storey building or apartment house passes a point where the fluid drained from the upright pipe to the transverse main pipe is passed. Its purpose is to provide a drainage system using a pressure extinguishing device for drainage pipes capable of extinguishing the pressure generated by the system.

In order to solve the above problems and achieve the object, the pressure extinguishing device for a drain pipe according to an embodiment of the present invention occurs when sewage and household sewage generated in a multi-storey building or apartment house are mixed with air and introduced into the drain pipe. A coupling portion coupled to the drain pipe and an expansion portion that is connected to the coupling portion and expands in volume so that the inner space into which the pressure generated in the drain pipe flows can be expanded. It includes, and the expansion portion includes a housing of a hollow body surrounding the outside, and the coupling portion is fastened to both ends of the housing.

A plurality of screw pressure ports are installed at the end of the expansion part, and the support shaft protrudes in the direction toward the coupling part, and the screw pressure ports are formed so that the sewage and domestic sewage or air introduced through the coupling part can be introduced into the expansion part. A screw housing, a screw member rotatably installed on a support shaft of the screw housing, and a plurality of rotary blades formed in a radial direction from the central axis to rotate when external pressure is introduced, and an internal space of the expansion part. It further includes a decompression unit for reducing the pressure introduced to the central portion.

The depressurization shaft is rotatably installed so as to penetrate the inside of the expansion unit while being inserted into the inlet groove. It is formed so as to surround the outside of the decompression shaft, and includes a decompression roll in which a plurality of inner and outer through holes are formed.

In the screw housing, a lead-in groove is formed in a direction toward the coupling part on an inner surface exposed toward the inside of the expansion part.

The coupling portion further includes a cover for selectively opening and closing.

On the other hand, the drainage system using the pressure extinguishing device for a drainage pipe according to an embodiment of the present invention extends from the ground in the vertical direction of the multi-story building or apartment house so that sewage and household sewage generated from the multi-storey building or apartment house are discharged to the outside. And a transverse main pipe intersecting and in communication with the upright pipe so that the sewage and domestic sewage introduced from the upright pipe reach a septic tank or a conduit end point, an elbow joint pipe connecting the vertical pipe and the transverse main pipe, and the mouth It is connected to the superior, and includes a pressure extinguishing unit that absorbs and extinguishes the pressure generated when the sewage and household sewage generated in the multi-story building or apartment house are mixed with air and introduced into the upright pipe.

The pressure extinguishing unit is installed in the upright pipe, a first branch part branched to discharge the pressure in the upright pipe, a pressure connection part provided to move the pressure discharged from the first branch part, and the pressure connection part It is installed in, and includes a pressure extinguishing device that absorbs and decompresses the pressure.

The pressure extinguishing unit includes a second branch installed in the transverse main pipe, and the pressure connection part is connected to the first branch, a first pressure connecting member provided with first and second inlets, A second pressure connecting member connected to the base and provided with first and second outlets, a first pressure pipe having one end connected to the first inlet, the other end connected to one side of the pressure extinguishing device, and one end of the pressure extinguishing device. A second pressure pipe connected to the other side of the pressure extinguishing device, the other end connected to the first outlet, and a third pressure pipe connected to the second inlet and the other end connected to the second outlet. do.

The pressure connection part is connected to the first branch, at least one pressure pipe, and a support member installed in the pressure extinguishing device to prevent shaking due to movement of pressure, and the pressure extinguishing device includes the It is installed in the pressure pipe so as to be supported by any one of the upright pipe, the transverse main pipe and the floor surface of the household floor by a support member.

The first pressure connecting member includes a compression control protrusion formed to protrude in a central direction from inside the first and second inlets so that the pressure is reduced by interfering with the flow of the pressure, and the pressure extinguishing device for the drain pipe includes the upright pipe It is provided so that air can be introduced from the outside when negative pressure occurs in the horizontal main pipe and elbow pipe.

The drainage system using the pressure extinguishing device for a drainage pipe according to the present invention is in a direction opposite to the direction in which the fluid flows when the fluid drained from the drainage pipe of a multi-storey building or apartment house passes the point where the drainage pipe changes from the standing pipe to the horizontal main pipe. There is an effect that can extinguish the pressure generated.

1 is a perspective view showing a pressure extinguishing device for a drain pipe according to an embodiment of the present invention.
2 is an exploded perspective view showing a pressure extinguishing device for a drain pipe according to a preferred embodiment of the present invention.
3 is a cross-sectional view showing a pressure extinguishing device for a drain pipe according to a preferred embodiment of the present invention.
Figure 4 is a cross-sectional view showing the operation of the pressure extinguishing device for a drain pipe according to an embodiment of the present invention.
5 is a view showing a drainage system using a pressure extinguishing device for a drain pipe according to a preferred embodiment of the present invention.
6 is a view showing a drainage system using a pressure extinguishing device for a drain pipe according to another embodiment of the present invention.
7 is a front view and a bottom view showing a pressure connection according to another embodiment of the present invention.
8 is a view showing a drainage system using a pressure extinguishing device for a drain pipe according to another embodiment of the present invention.

Hereinafter, a "drainage system using a pressure extinguishing device for a drain pipe" according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present invention, various modifications may be made and various forms may be applied, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, it should be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements. In the accompanying drawings, the dimensions of the structures are shown to be enlarged than the actual size for clarity of the present invention.

Terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of the presence or addition.

Unless otherwise defined, all terms used herein including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present application. Does not.

1 to 4, the pressure extinguishing device 10 for a drain pipe according to an embodiment of the present invention includes a housing 100, a coupling part 110, an expansion part 120, a screw housing 130, and a screw member. It includes (140) and a decompression unit (150).

The housing 100 is to prevent damage caused by the increase in pressure changed in the expansion part 120, and is formed of a hollow body extending in the left and right direction while surrounding the outside of the expansion part 120. It is preferable that the housing 100 is generally made of a plastic material.

The coupling part 110 is for absorbing and extinguishing the pressure generated when sewage and household sewage generated in a multi-storey building or apartment house are mixed with air and introduced into a drain pipe, and are respectively fastened to both ends of the housing 100 do.

The drain pipe generally includes an upright pipe 200, a transverse main pipe 300, and an elbow pipe 400, and collectively refers to a pipe through which the sewage and household wastewater are introduced.

The coupling part 110 is formed so that one side is in communication with the drain pipe so that the pressure generated in the drain pipe flows into the inside of the expansion part 120 and the other side is fastened to the housing 100. In addition, the coupling portion 110 further includes a cover 111 for selectively opening and closing one side.

The expansion part 120 expands so that the inner space into which the pressure generated in the drain pipe flows in can be expanded, and reduces the pressure flowing to the inner wall surface, so that it has an outer diameter corresponding to the inner diameter of the housing 100. The volume expands. Therefore, the internal space into which the pressure is introduced expands.

It is preferable that the expansion part 120 is formed of a flexible material that expands the internal volume as pressure is introduced, and when the pressure is discharged, the expanded volume is restored to its original state.

The screw housing 130 is formed such that a support shaft 131 protrudes in a direction toward the coupling part 110, and is installed at an end of the expansion part 120. The screw housing 130 has an inlet groove (not shown) formed on an inner surface exposed to the inner side of the expansion unit 120 in a direction toward the coupling unit 110.

The screw housing 130 is formed with a plurality of screw pressure ports 135 so that the sewage or air (pressure) introduced through the coupling unit 110 flows into the expansion unit 120.

The screw member 140 is to reduce pressure by mixing the pressure, and a plurality of rotary blades are formed in a radial direction from a central axis to rotate when external pressure is introduced, and a support shaft of the screw housing 130 ( 131) is installed rotatably.

The decompression unit 150 is provided to reduce the pressure introduced into the central portion of the inner space of the expansion unit 120, and further includes a decompression shaft 151 and a decompression roll 152.

The decompression shaft 151 is formed to extend in the left and right direction, and is rotatably installed so as to penetrate the inside of the expansion part 120 while being inserted into the inlet groove. The pressure reducing roll 152 is formed to surround the outside of the pressure reducing shaft 151. In addition, the pressure reducing roll 152 has a plurality of inner and outer through holes formed.

The operation of the pressure extinguishing device 10 for a drain pipe according to an embodiment of the present invention is as follows.

When the fluid drained from the drainage pipe of a multi-storey building or apartment house passes the point where the fluid drained from the upright pipe 200 to the transverse main pipe 300 is passed, the pressure generated in the direction opposite to the direction in which the fluid flows into the drain pipe. It is introduced into the coupling portion 110 in communication with and the introduced pressure is distributed in the center direction and the edge direction of the coupling portion 100 to be depressurized.

Subsequently, the pressure is mixed by the rotation of the screw member 140 and partially decompressed, passes through the screw housing 130, and flows into the expansion unit 120. At this time, the pressure (static pressure) flowing to the inner wall surface of the expansion unit 120 among the introduced pressure is reduced as the volume of the expansion unit 12 expands, and at the same time, the pressure reduction shaft 151 rotates to reduce the expansion unit. The pressure introduced into the central portion of the inner space of 120 is reduced. In addition, as the pressure is reduced, the expanded volume of the expansion unit 120 is contracted and restored to its original state.

In this way, the pressure extinguishing device 10 for a drain pipe according to the present invention has the advantage of being able to reduce the pressure by repeating the above process, and to continuously reduce the pressure generated in the drain pipe.

5, a drainage system using a pressure extinguishing device for a drainage pipe according to an embodiment of the present invention includes an upright pipe 200, a transverse main pipe 300, an elbow pipe 400, and a pressure extinguishing unit 500. .

The standing pipe 200 extends from the ground in the vertical direction of the multi-storey building or apartment house so that sewage and household sewage generated from the multi-storey building or apartment house flow to the outside, and can be branched if necessary.

The transverse main pipe 300 is provided to intersect and communicate with the upright pipe 200 so that the sewage and domestic sewage introduced from the upright pipe 200 reach a septic tank or a conduit terminal point, and can be branched if necessary.

The elbow pipe 400 is the upright pipe 200 and the transverse main pipe 300 are interconnected, one side is connected to the lower end of the upright pipe 200, the other end is connected to the end of the transverse main pipe 300 It is formed in a "b" shape.

The pressure extinguishing unit 500 is connected to the upright pipe 200 and absorbs the pressure generated when the sewage and household sewage generated in the multi-storey building or apartment house are mixed with air and introduced into the upright pipe 200 It extinguishes, and includes a first branch part 510, a pressure connection part 530, and a pressure extinguishing device 540.

The first branch part 510 is branched so that the pressure in the upright tube 200 is discharged, and is installed in the upright tube 200.

The pressure connection part 530 is connected to the first branch part 510 so that the pressure discharged from the first branch part 510 can move.

The pressure extinguishing device 540 is installed in the pressure connection part 530 and absorbs the pressure to reduce the pressure. The pressure extinguishing device 540 for a drain pipe uses a "pressure extinguishing device for a drain pipe 10" according to an embodiment of the present invention.

The pressure extinguishing device 540 further includes a negative pressure extinguishing device 550, and the negative pressure extinguishing device 550 allows air to be introduced from the outside when negative pressure is generated at the end of the pressure extinguishing device 540. It is prepared.

The negative pressure extinguishing device 550 is for solving a problem caused by a lower pressure, and has an advantage of extinguishing the negative pressure by introducing air into the pressure extinguishing device 540.

Therefore, the drainage system using the pressure extinguishing device for a drainage pipe according to an embodiment of the present invention refers to the point at which the fluid drained from the drainage pipe of an apartment house, etc. changes from the upright pipe 200 to the transverse main pipe 300 among the drain pipes. As it passes, pressure is created in the direction opposite to the direction in which the fluid flows.

At this time, the generated pressure passes through the first branch part 510 of the pressure extinguishing unit 500 installed in the upright pipe 200 to the pressure connection part 530 connected to the pressure extinguishing device, and the pressure extinguishing device ( 540) absorbs the pressure and reduces the pressure.

On the other hand, a pressure extinguishing unit 600 according to another embodiment of the present invention is shown.

Elements having the same function as in the drawings shown above are denoted by the same reference numerals.

6 and 7, the pressure extinguishing unit 600 includes a second branch 520. The second branch part 520 is branched so that the pressure in the pressure connection part 530 is discharged, and is installed in the transverse main pipe 300.

The pressure connection part 530 is to reduce the pressure discharged from the first branch part 510, and the first pressure connection member 531, the second pressure connection member 532, the first pressure pipe 533, It includes a second pressure pipe 534 and a third pressure pipe 535.

The first pressure connecting member 531 is provided with a first 531a and a second inlet 531b, and is connected to the first branch 510. The second pressure connecting member 532 is provided with a first 532a and a second outlet 532b, and is connected to the second branch 520.

The first pressure connecting member 531 and the second pressure connecting member 532 selectively select a "h" type connecting part, an "n" type connecting part, and a "T" type connecting part according to the site conditions and the construction conditions of the existing piping. Can be used as.

In one embodiment of the present invention, the first pressure connection member 531 uses an "n" type connection part and an "h" type connection part, and the second pressure connection member 532 uses a "T" type connection part. , But is not limited thereto.

The first pressure connecting member 531 and the second pressure connecting member 532 obstruct the flow of the pressure to reduce the pressure. And compression control protrusions 531c and 532c formed to protrude from the inside of the second outlet 532b in the center direction.

The first pressure pipe 533 has one end connected to the first inlet 531a, and the other end connected to one side of the pressure extinguishing device 540 for the drain pipe.

The second pressure pipe 534 has one end connected to the other side of the pressure extinguishing device 450 for the drain pipe, and the other end connected to the first outlet 532a.

The third pressure pipe 535 has one end connected to the second inlet 531b and the other end connected to the second outlet 532b.

In the pressure extinguishing unit 600 according to another embodiment of the present invention, since the pressure discharged from the first branch 510 is separated and moved through the first pressure connecting member 531, it is primarily reduced, and at the same time, The pressure is secondarily reduced by compression control protrusions 531c and 532c provided in the first 531a and second inlet 531b of the first pressure connecting member 531.

The second reduced pressure passes through the first pressure pipe 533 and the third pressure pipe 535, and the pressure passing through the first pressure pipe 533 is transferred to the pressure extinguishing device 540 for the drain pipe. It is introduced and is reduced to the third order.

Subsequently, the pressure that has passed through the second pressure pipe 534 and the third pressure pipe 535 flows into the first (532a) and second outlet (532b) of the second pressure connection member (532), and the compression The pressure of the residual material is finally reduced by the control protrusions 531c and 532c, and is discharged to the transverse main pipe 300 through the second branch 520.

Therefore, the pressure extinguishing unit 600 has the advantage of being able to discharge the pressure by reducing the pressure a plurality of times.

Meanwhile, referring to FIG. 8, a pressure connection part 700 according to another embodiment of the present invention is shown.

The pressure connection part 530 includes a pressure pipe 710 and a support member 720.

At least one of the pressure pipes 710 is connected to the first branch part 510. The pressure pipe 710 is branched into a plurality of pipes.

The support member 720 prevents shaking due to the movement of pressure, and is installed in the pressure extinguishing device 540.

At this time, the pressure extinguishing device 540 is installed in the pressure pipe 710 so as to be supported by the support member 720 on any one of the upright pipe 200, the transverse main pipe 300, and the floor surface of the household floor. , It is installed vertically or horizontally.

Conventional pressure extinguishing devices for drainage pipes are unsuitable for installation because the space at the construction site is narrow, and their efficiency is inferior. However, the pressure extinguishing device 540 of the pressure connection part 530 according to another embodiment of the present invention is easy to install in a cramped pit space with a low floor height, and the upright pipe 200, the transverse main pipe 300, and It is installed to be supported on any one of the floors of the household and has the advantage of preventing vibration due to the movement of pressure.

The description of the presented embodiments is provided to enable any person skilled in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those of ordinary skill in the art, and general principles defined herein can be applied to other embodiments without departing from the scope of the present invention. Thus, the present invention is not to be limited to the embodiments presented herein, but is to be construed in the widest scope consistent with the principles and novel features presented herein.

10: Pressure extinguishing device for drainage pipe
100: housing 110: coupling portion
111: cover 120: expansion portion
130: screw housing 131: support shaft
135: screw pressure port 140: screw member
150: decompression unit 151: decompression shaft
152: pressure reducing roll 200: granular tube
300: horizontal main pipe 400: elbow pipe
500: pressure extinguishing unit 510: first branch
520: second branch 530: pressure connection
531: first pressure connecting member 531a: first inlet
531b: second inlet 531c: compression control protrusion
532: second pressure connecting member 532a: first outlet
532b: second outlet 532c: compression control protrusion
533: first pressure pipe 534: second pressure pipe
535: third pressure pipe 540: pressure extinguishing device
550: negative pressure extinguishing device 600: pressure extinguishing unit
700: pressure connection 710: connection pipe
720: support member

Claims (5)

A standing pipe extending from the ground in the vertical direction of the multi-storey building or multi-family house so that sewage and household sewage generated from the multi-storey building or apartment house are discharged to the outside;
A transverse main pipe intersecting and communicating with the upright pipe so that the sewage and domestic sewage introduced from the upright pipe reach a septic tank or a conduit end point;
An elbow pipe connecting the upright pipe and the transverse main pipe;
And a pressure extinguishing unit connected to the upright pipe and absorbing and extinguishing the pressure generated when the sewage and household sewage generated in the multi-storey building or apartment house are mixed with air and introduced into the upright pipe.
Drainage system using pressure extinguishing device for drainage pipe.
The method of claim 1,
The pressure extinguishing unit
A first branch installed in the upright tube and branched so that the pressure in the upright tube is discharged;
A pressure connection part provided to move the pressure discharged from the first branch part;
It is installed in the pressure connection, characterized in that it comprises a pressure extinguishing device that absorbs and decompresses the pressure.
Drainage system using pressure extinguishing device for drainage pipe.
The method of claim 2,
The pressure extinguishing unit
It includes a second branch installed in the transverse main pipe,
The pressure connection part
A first pressure connecting member connected to the first branch and provided with first and second inlets;
A second pressure connecting member connected to the second branch and provided with first and second outlets;
A first pressure pipe having one end connected to the first inlet and the other end connected to one side of a pressure extinguishing device for a drain pipe;
A second pressure pipe having one end connected to the other side of the pressure extinguishing device for the drain pipe and the other end connected to the first outlet;
And a third pressure pipe having one end connected to the second inlet and the other end connected to the second outlet.
Drainage system using pressure extinguishing device for drainage pipe.
The method of claim 2,
The pressure connection part
At least one pressure pipe connected to the first branch;
It is installed in the pressure extinguishing device, further comprising a support member for preventing shaking due to the movement of pressure,
The pressure extinguishing device is installed in the pressure pipe so as to be supported by the support member on any one selected from among the upright pipe, the transverse pipe, and the floor surface of the household floor.
Drainage system using pressure extinguishing device for drainage pipe.
The method of claim 3,
The first pressure connecting member includes a compression control protrusion formed to protrude in a central direction from inside the first and second inlets so that the pressure is reduced by interfering with the flow of the pressure,
The pressure extinguishing device for the drain pipe further comprises a negative pressure extinguishing device provided to allow air to be introduced from the outside when negative pressure is generated in the upright pipe, the transverse main pipe, and the elbow pipe.
Drainage system using pressure extinguishing device for drainage pipe.

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