KR20210055568A - Pressure relief device for drain pipe - Google Patents

Abstract

The present invention relates to a pressure relief device for a drain pipe. According to the present invention, the pressure relief device for a drain pipe comprises: a coupling unit which is to absorb and dissipate the pressure generated when sewage and domestic sewage generated in a multi-story building or apartment house mix with air and enter the drain pipe, and is coupled to the drain pipe; and an expansion unit which is connected to the coupling unit and expands a space into which the pressure can be introduced while the volume expands when the pressure generated from the drain pipe is introduced. Accordingly, it is possible to absorb and dissipate the pressure generated when sewage and domestic sewage generated in a multi-story building or apartment house mix with air and enter the drain pipe.

Description

Pressure relief device for drain pipe

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

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 or each individual sanitary installation may be equipped with a vent pipe or a suitable vent valve, 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 protect the water and prevent polluted air or odor from the sewer from entering the surrounding space or living space, and is composed of U-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 toilet has a water trap installed in the fixture itself. Under certain conditions, such as negative air pressure or positive air pressure conditions, water traps may collapse (floating water) or dry water, as there is not enough water left in place to ensure blockage from the discharge pipe. This means that contaminated air enters the living space from the sewer.

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.

Vent valves allow air to enter the drainage system through a one-way air valve when sanitary equipment 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 ditch suddenly rises above the surroundings, this positive transient can cause the wastewater and air to be pushed into the sanitary facility and destroy the trap chamber, resulting in health and sanitation 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 problem, and is generated 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 an apartment house passes the point where the fluid drained from the upright pipe to the horizontal main pipe is passed. Its purpose is to provide a pressure extinguishing device for a drain pipe capable of extinguishing the pressure.

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.

The pressure extinguishing device for a drain pipe according to the present invention controls the pressure generated in the direction opposite to the direction in which the fluid flows when the fluid drained from the drain pipe of a multi-story building or apartment house passes the point where the fluid drained from the standing pipe to the transverse main pipe passes There is an effect that can be destroyed.

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.

Hereinafter, 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.

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

Claims (3)

For absorbing and extinguishing pressure generated when sewage and household sewage generated in a multi-story building or apartment house are mixed with air and introduced into a drain pipe, the coupling part is coupled to the drain pipe;
An expansion part connected to the coupling part and expanding in volume so that an internal space into which the pressure generated in the drain pipe flows may be expanded,
The expansion unit includes a hollow housing surrounding the outside,
Characterized in that the coupling portion is fastened to both ends of the housing, respectively
Pressure extinguishing device for drain pipe.
The method of claim 1,
A plurality of screw pressure ports are installed at the end of the expansion unit and have a support shaft protruding in a direction toward the coupling unit, and a screw pressure hole is formed so that the sewage and domestic sewage or air introduced through the coupling unit can be introduced into the expansion unit. Screw housing;
A screw member that is rotatably installed on a support shaft of the screw housing and has a plurality of rotary blades formed in a radial direction from a central axis to rotate when external pressure is introduced;
Further comprising a decompression unit for reducing the pressure introduced into the central portion of the inner space of the expansion unit,
The depressurization unit
A decompression shaft that 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 pressure reducing roll having a plurality of inner and outer through holes are formed,
The screw housing is characterized in that the inlet groove is formed in a direction toward the coupling portion on the inner surface exposed to the inside of the expansion portion.
Pressure extinguishing device for drain pipe.
The method of claim 1,
The coupling portion, characterized in that it further comprises a cover for selectively opening and closing
Pressure extinguishing device for drain pipe.

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