JP2004124356A - Drain pipe system and ventilation valve device for drainage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain pipe system improving draining performance while preventing odor from back flowing without requiring a space, suitable for a detached house or the like having water use equipment even in a high-rise dwelling house or second or third floors. <P>SOLUTION: A ventilation valve device 2 for drainage composed of a ventilation pipe 3 disposed in the substantially vertical direction, a ventilation valve 4 provided at the upper part of the ventilation pipe 3, and a check valve 5 provided at the lower part of the ventilation pipe 3 is formed. A branched pipe 6 is arranged in the middle of a vertical drain pipe A connected to a drain horizontal branch pipe B in each floor of a building and the ventilation valve device 2 for drainage is connected to the extremity of the branched pipe 6 to form the draining pipe system 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drainage pipe system suitable for a high-rise apartment building, a detached house having a water circulating facility on the second and third floors, and a drain valve for drainage suitable for the drainage pipe system.
[0002]
[Prior art]
In a two-story or more building with a flush toilet or kitchen sink at a high place, when the toilet is discharged, the discharged water flows into the sewer pipe by entraining the air in the drain pipe and draining the building. The pressure in the pipe may drop below atmospheric pressure.
[0003]
Due to this negative pressure, the trapped water attached to the flush toilet or sink is sucked out, the trap part becomes empty, and the odor from the drain pipe goes up to the toilet or kitchen. was there.
[0004]
As a countermeasure, in a conventional drain system for a building of an apartment house, a vertical drain pipe for collecting drainage from the drainage horizontal branch pipe on each floor is extended to near the roof of the apartment house, and an upper end of the extended vertical drain pipe is provided. A large ventilation valve for preventing trap breach is provided in the section, or a vertical ventilation pipe which only performs ventilation in parallel with the vertical drain pipe is provided in communication with the vertical drain pipe, and the inside of the drain pipe has a negative pressure. Was trying to prevent that.
[0005]
Further, there is an example in which a drain valve provided with a vent valve and a check valve is connected to a drain pipe on the downstream side of the drain trap (for example, see Patent Document 1).
[0006]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 9-126333 (FIG. 1)
[0007]
[Problems to be solved by the invention]
According to this conventional drain pipe system, a large vent valve is provided at the upper end of the extended vertical drain pipe. In a three-story detached house, there is a problem that it is difficult to install the large-sized ventilation valve in terms of space.
[0008]
Further, the above-described method of installing the vertical ventilation pipe in parallel with the vertical drain pipe also has a problem in terms of installation space and cost.
[0009]
Furthermore, the drainage vent valve device provided with the vent valve and the check valve is also provided with a branch portion for connecting the drainage pipe and the drainage vent valve device in a housing portion for accommodating the floating valve body of the check valve. Since it protrudes downward, there is a problem that it may be difficult to mount the drainage vent valve device in a narrow place such as under the floor.
[0010]
The present invention solves these problems, prevents backflow of odor without taking up space, and is suitable for a two- or three-story single-family house or high-rise condominium. It is an object of the present invention to provide a drainage pipe system and a drainage vent valve device suitable for the drainage pipe system.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a drainage system for a building having a vertical drainage pipe connected to a drainage horizontal branch pipe on each floor as a drainage pipe system, which automatically opens when the pressure in the drainage pipe drops. A vent valve device for drainage comprising a vent valve portion for taking in air from the outside and a check valve portion for preventing backflow of drainage is provided on the vertical drain pipe at each floor or at some floors. Further, the drain valve for drainage applied to the drain pipe system is characterized by comprising a vent valve provided above the vent pipe and a check valve provided below the vent pipe.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS.
[0013]
This embodiment shows a case in which the present invention is applied to a three-story single-family house. In the drainage pipe system diagram shown in FIG. 1, A is a vertical drainage pipe, and B1, B2, and B3 are each on the first floor. 2 shows drain horizontal branch pipes disposed below the second and third floors, and these drain horizontal branch pipes B1, B2 and B3 are connected to the vertical drain pipe A in communication.
[0014]
Reference numeral 2 denotes a drain valve for drainage, which forms the drainage pipe system 1 of the present embodiment.
[0015]
In FIG. 1, C denotes a flush toilet, D denotes a washstand, E denotes a kitchen sink, and F denotes a bathtub.
[0016]
The drain valve 2 is connected to the vertical drain pipe A between the drain horizontal branch pipe B3 below the third floor and the horizontal drain pipe B2 below the second floor via the branch pipe 6. .
[0017]
FIG. 2 shows the structure of the drain valve 2.
[0018]
That is, the drain valve 2 is formed in a small size as a whole, and a vent pipe 3 made of ABS resin or the like, which is a main body part, is opened up and down, a vent valve 4 provided in the opening above the pipe, And a check valve 5 provided in the section.
[0019]
Next, details of each part constituting the drainage vent valve device 2 will be described.
[0020]
First, the structure of the ventilation valve 4 will be described with reference to FIGS.
[0021]
The ventilation valve 4 has a mushroom-shaped umbrella-shaped valve box 4b formed at the top of the ventilation pipe 3 and a donut plate-shaped valve 4e housed in the valve box 4b so as to be able to move up and down. ing.
[0022]
The valve body 4e is simultaneously seated on an outer valve seat 4i provided on an inner peripheral portion below the valve box portion 4b and an inner valve seat 4h formed on an upper end surface of the ventilation pipe 3. An annular opening between the outer valve seat 4i and the inner valve seat 4h, that is, the air inlet 4j is closed so as to be openable and closable.
[0023]
Note that the valve box portion 4b is fixed to the ventilation pipe 3 via a plurality of ribs (not shown), and an inner chamber 4c is provided inside.
[0024]
Reference numeral 4f is a guide shaft provided to be suspended at the center of the valve box 4b.
[0025]
The valve element 4e is a donut plate made of flexible rubber or the like, and has a guide hole at the center thereof for holding the valve element 4e and loosely inserting it into the guide shaft 4f to move up and down. A plurality of ribs (not shown) are provided between the valve holder 4g and the donut plate-shaped portion of the valve body 4e.
[0026]
Further, the valve body 4e has a structure in which the front and back sides are always in communication with each other from the ventilation holes between the ribs, and the gas can flow around.
[0027]
Next, the structure of the check ring 5 will be described with reference to FIG.
[0028]
The check valve 5 has a bottomed cylindrical or basket-shaped housing portion 5c having a number of flow holes 5d, a flat spherical floating valve body 5b housed vertically in the housing portion 5c, It comprises an annular valve seat 5a provided above the housing 5c and a cylindrical main body 5f for housing the housing 5c.
[0029]
The accommodating portion 5c and the main body portion 5f are connected to each other at an upper portion thereof to form a double structure, a cylindrical flow path 5e is formed therebetween, and an upper end portion of the connecting portion. Is connected to the lower end of the ventilation pipe 3.
[0030]
The valve seat 5a is made of a material such as rubber having elasticity, and is annularly engaged above the housing portion 5c. The floating valve body 5b, which floats from below at the time of drainage reverse flow, contacts the valve seat 5a. In contact therewith, the pipeline to the ventilation pipe 3 is closed.
[0031]
The check valve 5 is detachably connected to a branch pipe 6 having an elbow pipe part 6c and a branch pipe part 6b bent in a V shape.
[0032]
Here, the branch pipe 6 is attached to the vertical drain pipe A between a drain horizontal branch pipe B3 below the third floor of the house, that is, a third floor, and a horizontal drain branch pipe B2 below the second floor. .
[0033]
That is, the branch pipe 6 is also formed of an ABS resin or the like, and is composed of a tubular connecting pipe part 6a at the root and a branch pipe part 6b branched obliquely upward from the connecting pipe part 6a. The inner diameter of the portion 6a is formed to have the same diameter as the outer diameter of the vertical drain pipe A, and the vertical drain pipe A having a cut-out middle portion is inserted therethrough and adhered thereto.
[0034]
Next, the operation and effect of the drainage pipe system 1 according to the first embodiment will be described with reference to the drawings.
[0035]
As shown in FIG. 3, the valve body 4e normally contacts the inner valve seat 4h on the upper end surface of the ventilation pipe 3 and the outer valve seat 4i provided on the inner peripheral portion below the valve box portion 4b by its own weight, as shown in FIG. It is seated in a state of contact, constantly seals the odor from the vertical drain pipe A, and has a check valve function against the backflow of drainage in the vertical drain pipe.
[0036]
That is, when water is drained by another drainage device, for example, a toilet bowl, the air in the vertical drain A described later is entrained together with the drain, so that the inside of the vertical drain A is in a negative pressure state, as indicated by the dotted arrow. The ventilation pipe 3 communicating with the drain pipe A and the inner chamber 4c are also in a negative pressure state. Thus, due to the pressure difference between this negative pressure and the atmospheric pressure of the air intake 4j communicating with the outside, the valve element 4e is moved to the state shown in FIG. To move outside air into the drain pipe.
[0037]
Then, the sucked air flows downward together with the drainage in the vertical drainage pipe A as shown in FIG. 5, and the negative pressure in the pipe is reduced by taking in the air into the pipe. Thus, all of the water in the kitchen sink, the belt wrap at the bottom of the washroom, and the S-shaped trap does not flow down, but remains in these traps to prevent the odor from flowing back and to drain the lateral branch pipe B and the vertical. In the drain pipe A, unpleasant noise accompanying drainage can be eliminated and drainage can be performed smoothly.
[0038]
Further, the flow of the drainage is brought to one side of the vertical drainage pipe A by the above-mentioned air flowing downward in the vertical drainage pipe A, and the flow rate of the drainage is increased by the amount of the narrowed water, so that the above intake air The drainage performance can be improved by increasing the flow rate of the drainage together with the negative pressure reducing action of the wastewater.
[0039]
Furthermore, since the branch pipe 6 is inclined so that the side of the ventilation valve device 2 is upward, even if drainage flows into the branch pipe 6, it can immediately flow down into the vertical drain pipe A.
[0040]
However, as shown in FIG. 6, when the drainage flows backward due to clogging on the downstream side of the vertical drainage pipe A, even if the drainage flows into the branch pipe 6, the air in the ventilation pipe 3 presses the valve body 4e and Since the valve is closed, high-pressure air in the ventilation pipe 3 and the branch pipe 6 prevents the drainage from rising in the branch pipe 6 and prevents backflow.
[0041]
Further, for example, in a state in which a small object such as dust is interposed between the valve body 4e and the valve seat 4h and the valve body 4e of the ventilation valve 4 cannot be completely closed and air is leaking, the drained water that has flowed back is discharged to the branch pipe 6. Flows into the ventilation pipe 3 through the flow passage 5d of the housing portion 5c to enter the inside of the housing portion 5c to float the floating valve body 5b, and the floating valve body 5b is pressed against the valve seat 5a to close the valve. The backflow prevention valve 5 can prevent the drainage from flowing back to the ventilation valve 4.
[0042]
As described above, the drain pipe system 1 of the present invention is not provided with a large vent valve at the top of the drain pipe as in the related art, but is provided with a vent valve device 2 which branches off in the middle of the vertical drain pipe A. In addition, the backflow of drainage is double prevented by closing the vent valve 4 and closing the backflow prevention valve 5 so that there is no fear of drainage blowing out from the vent valve 4 even when there is a large backflow. Furthermore, a ventilation valve 4 is provided above the ventilation pipe 3 and a check valve 5 is provided below the ventilation pipe 3, and the ventilation pipe 3 is arranged in a substantially vertical direction along the vertical drain pipe A, so that it can be compact even under the floor. In addition to being able to be installed, it is possible to improve the drainage property by retaining the trapped water.
[0043]
Further, even if a problem occurs in the drainage vent valve device 2, the drainage vent valve device 2 can be easily removed from the branch pipe 6, so that the vent valve 4 and the backflow prevention valve 5 can be easily inspected and replaced. be able to.
[0044]
In the present embodiment, the connecting pipe 6a at the root of the branch pipe 6 is formed in a cylindrical shape, and the vertical drain pipe A is inserted into the connecting pipe 6a and adhered. Instead, the branch pipe 13 shown in FIGS. 7 to 9 may be used.
[0045]
That is, the branch pipe 13 has a curved abutment plate 13a having a circular opening 13e in the center, a branch pipe part 13b fixed to the peripheral portion of the opening 13e of the contact plate 13a and extending obliquely upward, and the branch pipe 13b. An elbow pipe portion 13c bent in a rectangular shape connected to the pipe portion 13b, and an attachment member 13d for the contact plate 13a, the inner peripheral surface of the contact plate 13a having an outer peripheral surface of the drain pipe A The mounting member 13d is made of a metal or synthetic resin band having a curved surface with a radius equal to the surface.
[0046]
Thus, one to seven through-holes 12 are drilled in a predetermined circle G as shown in any of FIGS. 8A to 8D on the outer peripheral surface at a predetermined position of the existing vertical drainage pipe A. In the vertical drain pipe A, the contact plate 13a is firmly attached to the opened predetermined circle G by the attaching member 13d with the packing member 13f interposed therebetween so that the branch pipe portion 13b faces upward. The drainage vent valve device 2 is connected to the distal end of the portion 13b via the elbow pipe portion 13c, and the mounting operation is completed.
[0047]
According to this method, the vertical drain pipe of an existing building can be modified, and the drain valve 2 of the present invention can be easily attached.
[0048]
Further, instead of the branch pipe 6 or the branch pipe 13, a drain pipe joint 11 having a plurality of connection ports as shown in FIG. The drain horizontal branch pipe B or the drain valve 2 may be connected to the connection port 11a.
[0049]
Further, although the present embodiment has been described with reference to a three-story single-family house, it may be a multi-story apartment such as an apartment, or a two-story or four-story middle-rise house. Good.
[0050]
A second embodiment of the present invention will be described with reference to FIG.
[0051]
FIG. 11 shows a drainage pipe system 15 in a case where the present invention is applied to a 14-story high-rise apartment house, and a vertical drainage pipe A is connected to drainage horizontal branch pipes B1, B2, B3,. .
[0052]
A drain valve 2 is attached to a point of the vertical drain pipe A via a branch pipe 6 similar to that in the first embodiment.
[0053]
In the present embodiment, the drainage vent valve device 2 is provided for each of the three floors. However, the drainage vent valve device 2 measures the pressure in the pipe at a number of points along the vertical drainage pipe A. If the pressure becomes a negative pressure exceeding a predetermined value, the drain valve 2 for drainage may be attached thereto.
[0054]
As described above, the present invention can reduce the negative pressure in the drainage pipe to a predetermined value or less, for example, 40 mmAg or less, in a building such as a high-rise apartment house, and furthermore, it is possible to reduce the existing vertical drainage in the drainage shaft of the building. Since it can be easily implemented by attaching the drainage vent valve device 2 to the pipe A, there is an advantage that it can be effectively used for preventing the backflow of the odor of the sewage in the existing building.
[0055]
Although the present embodiment has been described with reference to a 14-story high-rise apartment building, this may be a case of a high-rise building other than a 14-story building.
[0056]
A third embodiment of the present invention will be described with reference to FIG.
[0057]
The drain pipe system 16 of the present embodiment is different from the second embodiment in that a vent valve 4 is provided at the upper end of a vertical drain pipe in the drain pipe system 15 of the second embodiment.
[0058]
The vent valve 4 has the same configuration as that at the top of the drain valve 2 and has the structure shown in FIG. 3 or FIG.
[0059]
By providing the ventilation valve 4 at the upper end of the vertical drain pipe A in this manner, the number of the drain valve 2 in the vertical drain pipe A can be reduced, which is convenient.
[0060]
A fourth embodiment of the present invention will be described with reference to FIG.
[0061]
FIG. 13 shows a drainage pipe system 17 in a case where the present invention is applied to a 14-story high-rise apartment house. A vertical drainage pipe A is connected to drainage horizontal branch pipes B1, B2, B3,. I have.
[0062]
A required drainage branch pipe B1, B2, B3,... Is provided with a drainage vent valve device 2.
[0063]
In the present embodiment, the drainage vent valve device 2 is attached to each of the three floors, but this is achieved by actually measuring the pressure in each of the drainage horizontal branch pipes B1, B2, B3,. If the pressure in the pipe becomes a negative pressure exceeding a predetermined value, the drain valve 2 may be attached thereto.
[0064]
This embodiment is convenient for adjusting the internal pressure in the drain horizontal branch pipe for each floor.
[0065]
A fifth embodiment of the present invention will be described with reference to FIG.
[0066]
The drainage pipe system 18 of the present embodiment is different from the fourth embodiment in that the vent valve 4 is provided at the upper end of the vertical drainage pipe in the drainage pipe system 17 of the fourth embodiment.
[0067]
Providing the ventilation valve 4 at the upper end of the vertical drain pipe A has an effect of reducing the value of the negative pressure in the drain horizontal branch pipe.
[0068]
In any of the above-described embodiments, the drainage vent valve device 2 may have the check valve 5 omitted.
[0069]
【The invention's effect】
As described above, according to the present invention, a drainage vent valve device having a small vent valve and a check valve is installed by branching from the middle of a vertical drain pipe or a drain horizontal branch pipe, so that space is not taken up. It has the effect of eliminating the negative pressure in the drainage pipe by the intake of the ventilation valve, keeping the trap sealed, and allowing the drainage of the drainage pipe system to flow down smoothly. Even in the middle, there is an effect that the backflow of drainage can be waterproofed twice by closing the vent valve of the vent valve device for drainage and closing the check valve.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a drainage pipe system according to a first embodiment of the present invention.
FIG. 2 is a sectional view of a portion of the drain valve.
FIG. 3 is a sectional view of a portion of the vent valve.
FIG. 4 is a sectional view of the vent valve in an open state.
FIG. 5
FIG. 6 is an operation explanatory diagram of the first embodiment.
FIG. 7 is a cross-sectional view of another example of the branch pipe for mounting a drain valve for drainage in the first embodiment.
8 is an explanatory view of a through hole of a vertical drain pipe of the branch pipe for mounting a drain valve for drain shown in FIG. 7;
FIG. 9 is a perspective view of a main part of the branch pipe shown in FIG.
FIG. 10 is a side view of a drain pipe joint part replacing the branch pipe for mounting the drain valve for drain in the first embodiment.
FIG. 11 is an explanatory view of a drain pipe system according to a second embodiment of the present invention.
FIG. 12 is an explanatory diagram of a drain pipe system according to a third embodiment of the present invention.
FIG. 13 is an explanatory diagram of a drain pipe system according to a fourth embodiment of the present invention.
FIG. 14 is an explanatory diagram of a drain pipe system according to a fifth embodiment of the present invention.
[Explanation of symbols]
1, 15, 16, 17, 18 Drainage pipe system 2 Drainage vent valve device 3 Vent pipe 4 Vent valve 5 Check valve 6, 13 Branch pipe 11 Drainage pipe joint A Vertical drainage pipe B, B1, B2, B3 Branch pipe

Claims (13)

In a drainage system for a building that has a vertical drainage pipe connected to the drainage horizontal branch pipe on each floor, the valve automatically opens when the air pressure in the drainage pipe falls and the backflow of drainage and the drainage air that is taken in from the outside. A drainage pipe system, wherein a drainage vent valve device including a check valve part for preventing the drainage is attached to the vertical drainage pipe on each floor or some floors of the building. 2. The drainage pipe system according to claim 1, further comprising a ventilation valve installed at an upper end of the vertical drainage pipe to automatically open and take in air from outside when the pressure in the vertical drainage pipe falls. In a drainage system for a building that has a vertical drainage pipe connected to the drainage horizontal branch pipe on each floor, the valve automatically opens when the air pressure in the drainage pipe falls and the backflow of drainage and the drainage air that is taken in from the outside. A drainage pipe system, wherein a drainage vent valve device comprising a check valve part for preventing the drainage is attached to a drainage horizontal branch pipe on each floor or some floors of the building. 4. The drainage pipe system according to claim 3, wherein a ventilation valve is provided at an upper end of the vertical drainage pipe to automatically open and take in air from outside when the pressure in the vertical drainage pipe falls. In a drainage system for a building having a vertical drainage pipe connected to a drainage horizontal branch pipe on each floor, a drainage pipe joint having a plurality of connection ports is arranged at a communication connection portion of the vertical drainage pipe with the drainage horizontal branch pipe. At the connection port of the drainage pipe joint, the drainage lateral branch pipe, a vent valve section that opens automatically when the pressure in the drainage pipe drops to take in air from the outside, and a reverse flow that prevents backflow of drainage. A drainage pipe system connected to a drainage vent valve device consisting of a stop valve. The valve automatically opens when the pressure in the ventilation pipe drops below the atmospheric pressure, and maintains the valve closed when the pressure in the ventilation pipe is equal to or higher than the atmospheric pressure to maintain the ventilation valve section and the check valve section. A vent valve for drainage, wherein a vent valve having a structure that also serves as a valve is provided above the vent pipe. The vent valve has a mushroom-shaped valve box part having a diameter larger than that of the vent pipe, and a disc-shaped valve element housed in the valve box part so as to be able to move up and down. A vent hole is provided to allow air to flow between the front and back surfaces of the valve body, and an outer valve seat provided at an inner peripheral portion of the valve box portion and an inner valve seat provided at an upper end portion of the vent pipe. 7. The vent valve device for drainage according to claim 6, wherein the valve element is simultaneously abutted to close the opening between the outer valve seat and the inner valve seat. The vent valve device for drainage according to claim 6 or 7, further comprising a check valve for preventing backflow of drainage at a lower portion of the vent pipe. The check valve is provided with a housing having a flow hole through which air or drainage can flow, a floating valve housed in the housing so as to be movable up and down, and when the floating valve floats by the backflowing drainage. The vent valve device for drainage according to claim 8, comprising a valve seat provided above the housing portion so as to abut the housing portion, and a tubular main body portion housing the housing portion. In the check valve, the floating body is formed in a flat spherical shape, the valve seat is formed in an annular shape, and the housing portion is formed in a bottomed cylindrical body having a large number of ventilation holes. The vent valve device for drainage according to claim 9, wherein a gap is formed between an outer peripheral portion of the housing portion and an inner peripheral portion of the main body. 2. The vertical drain pipe is provided with a branch pipe for attaching the drain valve to the vertical drain pipe in an obliquely upward direction, and the drain valve is connected to a tip end of the branch pipe. Or the drainage pipe system according to claim 2. A through hole is formed in the middle of the vertical drain pipe, a branch pipe communicating with the through hole and extending obliquely upward is attached to the vertical drain pipe by an attachment member, and the drain valve for drainage is provided at a tip end of the branch pipe. The drainage system according to claim 11 connected. The branch pipe has an opening at the center and has a curved contact plate that contacts the peripheral edge of the through-hole on the outer peripheral surface of the vertical drain pipe. The drainage pipe system according to claim 12, comprising a branch pipe part extending upward and an elbow pipe part bent in a rectangular shape connected to the branch pipe part.

Images