JP4364391B2 - Drainage vent - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drainage vent which is disposed at a predetermined position such as a drainage pipe or drainage stack including a kitchen sink, a washbasin, a drainage part of a bathtub, a drainage trap of a toilet, etc. provided in a building such as a house. Relates to the device.
[0002]
[Prior art]
This type of drainage pipe has various troubles such as difficulty in flowing drainage due to poor ventilation during drainage, odor generation, or noise due to drainage. Therefore, conventionally, techniques for solving these problems have been proposed.
[0003]
For example, Japanese Patent Laid-Open No. 9-126333 discloses that a connecting pipe is connected to a drain pipe, a branch pipe is provided on the connecting pipe in an obliquely outward direction, and the vent pipe includes a vent valve and a check valve. Device.
[0004]
Japanese Patent Application Laid-Open No. 6-346396 is a device provided with a vent hole that communicates the atmosphere to the main pipe downstream from the drain trap, and a valve that opens when the internal pressure becomes negative. is there.
[0005]
In Japanese Patent Publication No. 1-35235, an air inlet is provided in the valve chamber, and a connecting valve made of a ring-shaped movable valve body for opening and closing the inlet is provided in the middle of the pipeline.
[0006]
[Problems to be solved by the invention]
However, the conventional vent valve device has the following problems.
That is, the device disclosed in Japanese Patent Laid-Open No. 9-126333 requires a space for installing a branch pipe branched from the drain pipe and a vent valve attached to the branch pipe. When a device of a kind is installed, the internal space is occupied and narrowed, which hinders use in the cabinet. In addition, in this case, it is necessary to assemble the equipment parts on-site, so the construction is difficult.In addition, the self-weight seating type vent valve needs to be installed vertically, this work is difficult, and if the vent valve tilts even a little, Valve function may be impaired and odor leakage may occur.
[0007]
In addition, although the devices described in Japanese Patent Laid-Open Nos. 6-34496 and 1-35235 can effectively use the outer peripheral space of the drain pipe, when installed in the drain pipe, the foreign matter becomes a valve mechanism or the like. If clogging occurs or the drainage flows backward, the drainage may flow out of the vent hole.
[0008]
The present invention has been developed in order to solve the above-described conventional problems. The object of the present invention is to make the device compact and to facilitate installation to a drain pipe. It is to ensure that the verticality is obtained when the apparatus is installed.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 is provided with a bowl-shaped body having a valve chamber around the outer periphery of a pipe main pipe in a vertical state in a concentric circle shape, A vent valve mechanism that opens when the inside of the main pipe becomes negative pressure and is normally closed by its own weight is provided below the body, and a concentric outer periphery of the main pipe is provided via the vent valve mechanism. provided with an annular conduit for guiding the air taken Te to the present tube in a vertical state, below said conduit and the outer periphery of the main place a check valve ring, the check valve , Having a float function, provided so as to close the opening of the conduit when it floats around the outer periphery of the main pipe due to a water level, communicated vertically with the main pipe below the conduit, and A connecting member having a connecting portion communicating with the drain pipe in a vertical state is disposed at the lower end. It is a drainage for ventilation equipment.
[0010]
In this case, a function of making the conduit and the vent valve mechanism have the same pressure by connecting the collecting groove for collecting the accumulated water around the outer periphery of the vent valve mechanism and the conduit through the communication port, and the drain into the drain pipe. Exhibits the function of discharging. Further, the tubular lower end of the main pipe is protruded downward from the position of the annular check valve so as to prevent foreign matter such as water jump from adhering to the check valve.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a drainage vent device according to the present invention will be described with reference to the drawings.
FIG. 1 is a partially cutaway front view showing an example in which a drainage venting device is provided in a drain pipe of a washbasin. In the figure, reference numeral 1 denotes a drainage venting device. At the middle of the drainage pipes 3 and 3, the drain pipes 3 and 3 are mounted at positions near the downstream side of the trap portion 4.
[0012]
In FIG. 3, the drainage aeration apparatus 1 includes a pipe-shaped main pipe 5 and a pipe-shaped connecting member 6 provided integrally or separately with the main pipe 5. Connect to drain pipes 3 and 3.
[0013]
In this example, a threaded portion 5 a formed on the main pipe 5 and a threaded portion 6 a formed on the connecting member 6 are connected to the drainage pipe 3 by joints 9, 9 including a nut 7 and a packing 8. This joint structure is changed according to the type of the drain pipe 3 to which the drainage ventilator 1 is connected, the installation location, and the like, and the joint structure and means are appropriately selected according to the implementation.
[0014]
Further, a bowl-shaped body 10 having an opening 10 a below the outer periphery of the main pipe 5 is provided integrally or separately from the main pipe 5 in a concentric manner. The opening 10 a has an outer annular valve seat 11 and an inner annular valve seat 12, an air inlet 13 is provided between them, and air taken into the outer periphery of the main pipe 5 is guided into the main pipe 5. The ventilation member 15 provided with the conduit 14 is fitted. Reference numeral 13 a denotes ribs provided radially to connect the annular valve seats 11 and 12.
[0015]
As shown in FIGS. 2 and 4, a vent valve mechanism 16 is provided in the valve chamber 17 in the body 10 that moves up and down to take in air from outside when the pressure in the drain pipe 3 drops. The vent valve mechanism 16 has a valve body 19 in which an annular flexible member formed of a material such as rubber is attached to a holding member 18 having a circular guide hole 18 a while guiding the main pipe 5 or the conduit 14. 17 is an automatic seating type that moves up and down and is usually seated on the annular valve seats 11 and 12 by its own weight. When the inside of the pipe becomes negative pressure, it is lifted by atmospheric pressure and released in response to it. .
[0016]
In FIG. 4, a collecting groove 20 for collecting stagnant water is provided around the outer periphery of the annular valve seat 11, and the collecting groove 20 and the conduit 14 are communicated with each other through a communication port 21, whereby the conduit 14 and the vent valve mechanism 16 are connected. It has the function of making the same pressure and the function of discharging drainage such as condensed water generated in the valve chamber 17 into the drain pipe 3.
[0017]
As shown in FIG. 5, the check valve 22 is provided with an annular check float 24 integrally or separately on the lower surface of the check valve body 23 formed of a flexible material such as rubber. The contact surface of the check float 24 with the check valve body 23 has a convex surface 24a, and the convex surface 24a ensures the flexibility of the check valve body 23 and is provided at the lower end of the conduit 14. The sealing property with the check sheet 25 which is an opening is enhanced.
[0018]
The check valve 22 bulges below the ventilation member 15 to form an air passage 15a, and a radial rib 26 is provided in the bulging area to guide the check valve 22 to move up and down. Further, a radial projection piece 27 is provided on the bulging portion of the connection member 6, and a check valve 22 is placed on the upper end of the projection piece 27. The connecting member 6 is connected to the bulging portion of the ventilation member 15 in a fitted state. Further, as shown in FIG. 5, the lower end portion of the main pipe 5 is protruded downward from the position of the check valve 22 to prevent foreign matter from drainage from adhering to the check valve 22 due to jumping water or the like.
Furthermore, since the check valve 22 has an annular shape surrounding the main pipe 5 and is mounted on the upper end of the protruding piece 27, the check valve body 23 and the check float 24 are moved into the main pipe 5. The structure does not leak.
[0019]
Next, the operation of the above embodiment will be described.
3, when the pressure in the drain pipe 3 is the same as the atmospheric pressure, the valve body 19 is seated on the valve seats 11 and 12 by its own weight, and the air inlet 13 is closed by the valve body 19.
[0020]
Next, for example, as shown in FIG. 1, when water is drained after using the wash basin 2, the pressure in the drain pipe 3 becomes negative, so that it communicates with the drain pipe 3 through the conduit 14. The pressure inside the valve chamber 17 becomes a negative pressure from the atmospheric pressure, and the valve body 19 is lifted by the atmospheric pressure in response to the negative pressure to open the inlet 13 and take in air. The sealing water loss in the trap part 4 is reduced, so that it does not break.
[0021]
Next, when the pressure in the pipe becomes positive, the valve body 19 is seated, the inlet 13 is closed, and odor is prevented from flowing out to the outside.
[0022]
Furthermore, as shown in FIG. 4, the conduit 14 and the vent valve mechanism 16 have the same pressure by connecting the collecting groove 20 for collecting the accumulated water around the outer periphery of the vent valve mechanism 16 and the conduit 14 through the communication port 21. In addition, the function of negative pressure propagation to the vent valve mechanism 16 is exhibited, and the function of discharging drainage such as condensed water into the drain pipe 3 is also exhibited.
[0023]
Further, as shown in FIG. 5, the check valve 22 has a float function, and when it floats together with the check float 24 due to the level of drainage, the check valve 25 of the conduit 14 is closed to close the vent valve mechanism. Prevents drainage from flowing back to the side.
[0024]
In addition, although said example demonstrated the washbasin, it can use widely for the drainage pipe or drainage standpipe etc. which include drainage traps, such as drainage parts, such as a kitchen sink, a bathtub, and a toilet bowl.
[0025]
【The invention's effect】
As is clear from the above, according to the invention according to claim 1, a compact drainage ventilation device can be obtained, and a space such as a cabinet can be effectively utilized. Installation is completed with only connection work, and this venting device is attached to a drain pipe that is vertically plumbed so that the verticality required by the vent valve mechanism can be easily secured. There is no risk that the air vent valve will operate reliably and odor leakage will occur.
[0026]
By connecting the collecting groove for collecting the accumulated water around the outside of the vent valve mechanism and the conduit through the communication port, the water remaining due to condensation can be discharged into the drain pipe, and the conduit and the vent valve mechanism. The vent valve mechanism can be reliably operated only when necessary.
[0027]
In addition, for example, a check valve mechanism is provided even if drainage flows backward due to a trouble in the downstream of the drainage, so there is no concern about water leakage, etc. There is an effect.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing an example in which a drainage ventilation device according to the present invention is provided in a drainage pipe of a washbasin.
FIG. 2 is a perspective view showing the components of the drainage vent device in FIG. 1 separately.
FIG. 3 is an enlarged longitudinal sectional view of a drainage venting device.
4 is a partial cross-sectional view showing a state where the vent valve mechanism in FIG. 3 is opened.
5 is a partial cross-sectional view showing a state where the check valve in FIG. 3 is closed. FIG.
6 is a cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Drainage apparatus 2 Drainage stand 3 Drain pipe 5 Main pipe 11 Annular valve seat 12 Annular valve seat 13 Air inlet 14 Conduit 16 Venting valve mechanism 20 Collection groove 21 Communication port 22 Check valve 23 Check valve body 24 Check float

Claims (3)

A bowl-shaped body having a valve chamber is provided concentrically around the outer circumference of a pipe-shaped main pipe in a vertical state, and the lower opening of the body opens when the pressure inside the main pipe becomes negative, usually by its own weight. a vent valve mechanism is closed is provided, below said body, the outer periphery concentric of the main, an annular conduit for guiding the air taken through the vent valve mechanism to the present tube In addition to being provided in a vertical state, an annular check valve is disposed below the conduit and on the outer periphery of the main pipe. The check valve has a float function, and the outer periphery of the main pipe is controlled by a water level. A connecting member provided so as to close the opening of the conduit when floating, and having a connecting portion that communicates with the main pipe in a vertical state and communicates with a drain pipe at the lower end in a vertical state at the lower end of the conduit. A ventilating device for drainage, characterized in that   The drainage aeration apparatus according to claim 1, wherein a collecting groove for collecting stagnant water and the conduit are communicated with each other through a communication port around an outer periphery of the vent valve mechanism. The drainage aeration apparatus according to claim 1 or 2, wherein a tubular lower end of the main pipe projects downward from a position of the annular check valve.

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