JP3041301B1 - Intake valve - Google Patents

Abstract

The present invention provides an intake valve which has excellent sealing properties between a valve body and a valve seat and does not leak odor from an intake port. SOLUTION: An opening 13 communicating with a drainage pipe is formed in a bottom surface portion 10 of a valve chamber 6 of a valve body 7. Inlet that absorbs outside air
14 is formed on the bottom portion 10 of the valve chamber 6. A valve seat 15 is formed along the periphery of the intake port 14. The valve body 8 is attached so as to be able to advance and retreat along the opening direction of the intake port 14. The packing 9 is mounted coaxially with the valve 8 away from the lower end surface 32 of the valve 8. The packing 9 separates from the valve seat 15 to open and close the intake port 14, and the contact surface 33 on the lower surface side is in close contact with the valve seat 15 at the closed position of the intake port 14. The sealing between the contact surface 33 of the packing 9 and the valve seat 15 can be sufficiently ensured. The packing 9 can ensure sufficient sealing even if the valve seat 15 has some irregularities.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for relieving a negative pressure by sucking outside air into a drainage pipe when the inside of the drainage pipe disposed in a middle-high-rise building is in a negative pressure state. The present invention relates to an intake valve for communicating a drain pipe to outside air so as to prevent breakage of a trap connected to the drain pipe.

[0002]

2. Description of the Related Art Conventionally, drainage facilities such as toilet bowls, sinks, and baths are connected to indoor drainage pipes that are plumbed into middle- and high-rise buildings. Further, on the downstream side of the drainage pipe,
An outdoor drainage pipe is connected. Further, the downstream side of the drain pipe joins a sewage main pipe buried in a road or the like via a drain horizontal main pipe. Unpleasant odors are drifting inside the sewage mains, etc., and these unpleasant odors rise in the drainage pipes. A trap is attached.

[0003] However, when drainage flows rapidly into the drainage pipe,
The drainage pipe is partially full and the upstream side of the full state is reduced in pressure from the outside air pressure, that is, a negative pressure state. The seal water is sucked, and the odor drifting in the drainage pipe leaks into the room.

[0004] Therefore, in order to prevent the trap from being broken, the drainage vertical pipe connecting the drainage horizontal branch pipes in the room to which the drainage equipment of the building is connected is connected to the top of the vertical drainage pipe. A ventilation system is employed in which the pressure is released to the outside air to eliminate a negative pressure state that occurs when the drainage pipe is full.

[0005] However, in this ventilation system, when the flow of drainage in the drainage pipeline is interrupted, there is a problem that an odor floating in the sewage main pipe or the like is released from the opening on the upper end side of the top ventilation pipe. .

Therefore, there is known an intake valve described in Japanese Utility Model Registration No. 2578451. This intake valve is attached to the opening on the upper end side of the vertical vent pipe of the drainage pipe indoor, and when the middle of the drainage pipe becomes full, the upstream side becomes negative pressure and the air pressure in the drainage pipe becomes The intake valve opens due to the pressure difference from the outside air pressure, the outside air is sucked into the drainage pipe, the negative pressure state is eliminated, and by eliminating the negative pressure state, the intake valve is opened due to its own weight of the valve body. A system is adopted in which the intake port is closed and odor does not leak out of the drainage pipe.

[0007] The intake valve described in Japanese Utility Model Registration No. 2578451 is concentric with the opening along the outer peripheral edge of the opening formed in the bottom of the valve chamber of the valve body and communicated with the drain pipe. A ring-shaped intake port is opened, and a concentric double annular valve seat is formed on an inner peripheral edge and an outer peripheral edge of the intake port. An annular valve element formed of a material having the following structure is provided in the valve chamber of the valve body, and the valve element always contacts the inner and outer peripheral edges of the valve seat and closes the intake port. Becomes negative pressure, the valve body is sucked by the negative pressure, floats up, opens the intake port, sucks outside air into the drain pipe, and when the negative pressure state in the drain pipe is eliminated, the valve The body contacts the inner and outer peripheral edges of the valve seat by its own weight, closing the intake port and leaking the odor inside the drain pipe to the outside Configuration is taken that was to be no.

However, when the inside of the drainage pipe is at the same pressure as the outside air pressure, it is necessary to completely close the intake port to prevent the odor from leaking.
In the intake valve described in Japanese Patent Publication No. 51, the valve seat contacting the valve body is formed in a double annular shape along the periphery of the opening of the valve body, and the valve seat has a long circumferential length. It is difficult to secure the tightness between the valve and the valve seat, and the valve body is formed of an elastic material. For this reason, it is necessary to form the valve body so as to have a certain degree of rigidity. Therefore, there has been a problem that it is difficult to ensure sufficient sealing when the valve body contacts the valve seat.

Further, an intake valve described in Japanese Patent No. 2868633 is also known. The intake valve is attached to and detached from a substantially annular valve seat formed on the periphery of a substantially circular intake port formed on the bottom surface of the valve body to open and close the intake port, and is attached to the intake port so as to be movable forward and backward. The substantially disc-shaped valve element
It is formed of an elastic material such as rubber. This valve body always closes the intake port, and only when the inside of the drainage pipe is in a negative pressure state, the valve body is sucked and floats, the intake port is opened, and the outside air is sucked into the drainage pipe. To eliminate the negative pressure condition. When the negative pressure state is eliminated, the valve body closes the intake port by its own weight to prevent the odor from leaking.

[0010] However, the above-mentioned Japanese Patent No. 2,866,833.
In the intake valve having the configuration described in Japanese Patent Laid-Open Publication No. H06-27, the valve seat is formed in a substantially annular shape, and the valve body is formed in a substantially disc shape, so that the valve body is easily sealed with respect to the valve seat. However, since the valve body is formed of an elastic material in order to ensure the tightness between the valve body and the valve seat, the valve body needs to perform the function of opening and closing the intake port by coming into contact with and separating from the valve seat. Therefore, it must be formed to have a certain degree of rigidity. As a result, this valve element has a problem that it is difficult to ensure sufficient sealing when it comes into contact with the valve seat.

[0011]

As described above, the intake valve described in Japanese Utility Model Registration No. 2578451 and the intake valve described in Japanese Patent No. 2868633 are formed of a material having a valve body having elasticity. Therefore, it is difficult to ensure sufficient sealing between the valve body and the valve seat, and unpleasant odor drifting from the gap formed when the valve body and the valve seat abut on the sewer main pipe, etc. The inconvenience of leakage has occurred.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an intake valve which is excellent in hermeticity between a valve body and a valve seat and does not leak odor from an intake port.

[0013]

According to a first aspect of the present invention, there is provided an intake valve comprising: a valve chamber; an opening formed in a bottom surface of the valve chamber and communicating with a drain pipe; An intake port for sucking outside air provided by opening as described above, and a valve main body having a valve seat formed along a peripheral edge of the intake port, respectively, and are attached to the opening and closing of the intake port so as to be able to advance and retreat. And the valve body, which is separated from the lower end surface of the valve body and is coaxially attached to the valve body, opens and closes each of the intake ports by coming into contact with and separating from a valve seat of the valve body, and a closing position of the intake ports. And a packing whose lower contact surface is in close contact with the valve seat.

Since the packing which opens and closes each intake port while being in contact with and separated from the valve seat of the valve body is attached to the valve body, the valve body and the packing advance and retreat together, and the packing is formed on the lower end surface of the valve body. The packing does not contact the lower end surface of the valve body even when the packing is in contact with the valve seat because the packing is in contact with the valve seat at a distance from the valve body. Since a gap is always formed between the lower end surface and the packing, the elasticity of the packing itself is sufficiently exhibited. For this reason, when the inside of the drainage pipe is not in a negative pressure state, the contact surface of the packing comes into contact with the valve seat by the weight of the valve body and the packing, but the elastic deformation of the packing due to the weight of the valve body and the packing is caused. As a result, the tightness between the packing and the valve seat is sufficiently ensured, so that leakage of odor from each intake port is prevented.

Further, even when the contact portion of the valve seat has some irregularities, the packing is attached to the valve body at a distance from the lower end face of the valve body. Since the packing does not come into contact with the lower end surface of the valve body when contacting the valve seat, a sufficient sealing property is ensured even for a valve seat having some unevenness due to the elastic deformation of the packing itself.

According to a second aspect of the present invention, in the intake valve according to the first aspect, a plurality of intake ports of the valve body are formed at symmetrical positions around the center of the opening of the valve body. Things.

Since a plurality of intake ports are formed at the bottom of the valve chamber around the center of the opening of the valve body,
When the inside of the drainage pipe becomes a negative pressure state than the outside air pressure, outside air is quickly sucked from the plurality of intake ports, and one of the valve bodies attached to each intake port is damaged. Even if it does not work, the valve body attached to the other intake port functions, so that the maintenance cycle is extended and the handling becomes easy.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the intake valve of the present invention will be described below with reference to the drawings.

1 to 7, reference numeral 1 denotes an intake valve,
For example, as shown in FIG. 7, each of the drainage facilities 2 such as a toilet, a bathroom, and a lavatory is attached via a socket 5 to an upper end opening 4 of a drainage pipe 3. The intake valve 1 has a valve body 7 having a valve chamber 6 formed therein, and a valve body 8 attached to the valve body 7 so as to be able to move forward and backward.
And a packing 9 mounted coaxially with the valve body 8.
It is composed of

The valve body 7 includes a base plate 11 formed in a substantially flat rectangular shape to form the bottom surface 10 of the valve chamber 6.
And a cover member 12 formed into a substantially rectangular box shape with an open lower surface to be fitted to the substrate member 11.
Further, the substrate member 11 and the cover member 12 are formed of synthetic fibers such as vinyl chloride resin.

The valve chamber 6 of the valve body 7 has an opening 13 communicating with the upper end opening 4 of the drain pipe 3, an intake port 14 for sucking outside air, and a peripheral edge of the intake port 14. And a valve seat 15 is formed.

Further, the opening 13 is formed by opening a substantially central portion of the substrate member 11 forming the bottom surface portion 10 of the valve body 7 in a substantially circular shape. A connection pipe portion 16 is formed to project outward. Also,
The connection pipe 16 is formed so as to be joined to the upper end opening 4 of the drain pipe 3 via the socket 5 or the like.

The intake port 14 is provided in FIG. 1 and FIG.
As shown in FIG. 5, the bottom portion 10 of the valve chamber 6 is formed to be opened in a substantially circular shape, and is formed at a symmetrical position about the center of the opening portion 13. For example, four corner corners along the periphery of 13 are provided side by side and provided on the substrate member 11 of the valve body 7 in parallel. Further, as shown in FIGS. 1, 2, and 4, a substantially cylindrical valve seat base 17 is formed on the periphery of each of the intake ports 14 and protrudes inward along the periphery. . The valve body 8 is provided at the upper end of the valve seat base 17.
The valve seat to which the packing 9 attached to the valve comes and goes
15 are formed respectively. A plurality of support pieces 18 that protrude radially toward the center are integrally formed at the lower portion of the inner periphery of the valve base 17. In addition, these support pieces
A substantially cylindrical support cylinder 19 projecting upward is integrally formed at the center of the cylinder 18.

Here, on the outer peripheral portion of the substrate member 11, a convex fitting ridge 20 is formed integrally over the entire circumference.
Further, on the lower peripheral portion of the cover member 12, a concave fitting edge portion 21 fitted to the fitting convex edge 20 of the substrate member 11 is formed via a step portion 22 which is widened outward. I have. And
As shown in FIGS. 1, 2, 4, and 5, a fitting edge 21 of the cover member 12 is fitted to a fitting convex edge 20 of the board member 11, and the board member 11 and the cover member The valve chamber 6 is formed in a space covered by the valve chamber 12.

Next, the valve body 8 is formed of an acrylonitrile-butadiene-styrene resin, that is, an ABS resin or the like. As shown in FIG. 1 to FIG. 4 and FIG. A substantially frusto-conical conical portion including a peripheral surface portion 23 inclined downward and a substantially circular flat portion 24 having the center portion flattened.
It has 25. At the center of the conical portion 25 on the lower surface side of the flat portion 24, a substantially columnar guide rod portion 26 that projects vertically downward is formed. The guide rod 26 is formed so as to be inserted into the support cylinder 19 of the intake port 14. Further, on the lower surface side of the flat portion 24, a substantially cylindrical mounting tube portion 27 for mounting the packing 9 is formed. The mounting cylinder 27 is located at a position surrounding the guide rod 26, and is formed coaxially with the guide rod 26. The mounting cylinder 27 is formed in a substantially cylindrical shape for stealing.

The packing 9 has a substantially flat annular portion 29 having a mounting hole 28 opened at a substantially central portion thereof, and an upper end surface 30 of the annular portion 29. And a substantially cylindrical spacing cylinder portion 31 protruding along the peripheral edge. The separation tube portion 31 is inserted from the distal end side of the guide rod portion 26 of the valve body 8 and attached to the outer peripheral portion of the mounting tube portion 27 of the valve body 8. Here, the valve body 8 has a mounting cylinder portion.
27, the packing 9 is attached to the mounting cylinder 27. However, the mounting cylinder 27 is not formed on the valve body 8, and the packing 9 is formed on the guide rod 26 of the valve body 8. It can be configured to be attached to the base end side. Further, the packing 9 is provided with an annular portion 29 of the packing 9.
The upper end surface 30 is spaced apart from the lower end surface 32 of the conical portion 25 of the valve body 8 and is mounted coaxially with the guide rod 26 of the valve body 8.

Here, the guide rod 26 of the valve body 8 to which the packing 9 is attached is connected to the intake port of the board member 11.
The support tube 19 is inserted into the support tube 19 facing up and down so as to be movable up and down. When the valve body 8 and the packing 9 are moved up and down by the guide of the guide rod 26, the packing 9
The contact surface 33 on the lower surface side of the annular portion 29 is separated from or comes into contact with the valve seat 15. Further, a substantially columnar stopper 34 for regulating the range of elevation of the valve element 8 is fixed to the inside of the upper surface of the cover member 12 so as to face the elevation position of each valve element 8.

Further, as shown in FIG. 7, the intake valve 1 is connected to a drain horizontal branch pipe 35 via a trap (not shown) to each of the drainage facilities 2 such as a toilet bowl, a bathroom and a lavatory on each floor. The drain horizontal branch pipes 35 on each floor are
Each is connected to a drain vertical pipe 37 via 36. Also,
An extension vent pipe 38 is connected to the upper end side of the drain vertical pipe 37. The connection pipe section 16 of the valve body 7 is connected to the upper end opening 4 of the extension vent pipe 38 via the socket 5 or the like. Is connected. Further, a lower end side of the drainage vertical pipe 37 is connected to a sewage main pipe (not shown) via a drainage horizontal main pipe 39 buried underground or the like. Here, the drain horizontal branch pipe 35, the drain vertical pipe 37, the extension vent pipe 38, and the drain horizontal main pipe 39 are provided.
Is provided in the drainage pipe 3.

Next, the operation of the intake valve of the above embodiment will be described.

First, as shown in FIG. 1, the packing 9 attached to the valve body 8 always descends due to the weight of the valve body 8 and the packing 9, and the contact surface of the packing 9.
33 closes the valve seat 15 and closes the intake port 14. In this state, the odor inside the drain pipe 3 does not leak from the upper end opening 4 of the top ventilation pipe 38.

When the water is rapidly drained from the drainage facility 2, the drainage horizontal branch pipe 35 and the drainage vertical pipe 37 of the drainage facility 2 meet.
Turbulence occurs at 36, and the drainage vertical pipe 37 of the drainage pipe line 3 becomes full, and the upstream side of this full state becomes a negative pressure state. Therefore, the inside of the valve chamber 6 communicating with the opening 13 of the valve body 7 is also in a negative pressure state, and as shown in FIG. Each valve body 8 and packing 9 are pushed up to open each intake port 14. At this time, outside air is sucked from each intake port 14.

Then, the air sucked into the valve chamber 6 passes through the top ventilation pipe 38 through the opening 13 and is sucked into the drain vertical pipe 36 shown in FIG. Eliminate the condition.

As described above, even if the inside of the drainage pipe 3 is in a negative pressure state, each valve body 8 functions and sucks outside air from each intake port 14, so that the negative pressure state is eliminated. For this reason, the sealed water constantly stored in the trap of the drainage equipment 3 is not sucked and the sealed water is not broken.

Further, when this negative pressure state is eliminated and the inside of the drain pipe 3 returns to the normal pressure by suction of the outside air, the guide rod portion 26 of the valve body 8 is guided by the support cylinder portion 19 and its own weight. Then, the packing 9 of each valve body 8 comes into contact with the valve seat 15 to close each intake port 14. At this time, each intake port 14 is securely sealed by the elasticity of the packing 9 attached to each valve body 8, so that unpleasant odor drifting inside the drain pipe 3 does not leak from the intake port 14.

As described above, in the above embodiment,
The distal end of the guide rod 26 of the valve body 8 is inserted into the packing 9 from the distal end of the separation tubular portion 31 of the packing 9, and is inserted into the outer peripheral portion of the mounting tubular portion 27 of the valve 8. Are mounted in contact with each other. As a result, the packing 9 is attached to the valve body 8 with the upper end surface 30 of the packing 9 separated from the lower end surface 32 of the valve body 8, and the contact surface of the packing 9 is formed by the weight of the valve body 8 and the packing 9. The lower end surface 32 of the valve body 8 when 33 comes into contact with the valve seat 15
A gap is formed between the packing 9 and the upper end surface 30 of the packing 9, and the packing 9 is always supported by the valve body 8, so that the rigidity of the annular portion 29 of the packing 9 is not considered. The annular portion 29 of the packing 9 can have sufficient elasticity. Therefore, when contacting the valve seat 15, the sealing between the contact surface 33 of the packing 9 and the valve seat 15 is sufficiently performed by the elastic deformation of the annular portion 29 of the packing 9 due to the weight of the valve body 8 and the packing 9. As a result, leakage of unpleasant odor from the intake port 14 can be prevented.

Further, since the annular portion 29 of the packing 9 is attached away from the lower end surface 32 of the valve body 8,
That is, the lower end surface 32 of the valve body 8 and the upper end surface 30 of the packing 9
Is always formed between the valve seat 8 and the packing 9 by its own weight.
When the abutment 33 comes into contact, the annular portion 29 of the packing 9 is elastically deformed, so that the smoothness of the valve seat 15 is somewhat poor. That is, even if the valve seat 15 has some irregularities, the annular portion 29 of the packing 9 seat
Sufficient airtightness for 15 can be secured.

Further, since a plurality of intake ports 14 are formed in the bottom surface portion 10 of the substrate member 11 of the valve body 7, when the inside of the drainage pipe 3 is in a state of a negative pressure higher than the outside air pressure, Outside air is quickly sucked from the plurality of intake ports 14. In addition, each intake port 14
Even when one of the valve bodies 8 that opens and closes becomes inoperable, the other intake port 14 is opened by the other valve body 8, so that the negative pressure state inside the drain pipe 3 can be eliminated. Therefore, the maintenance cycle can be extended and maintenance management can be reduced.

As shown in FIG. 7, when the toilet or the like connected to the drain pipe 3 of a middle-high-rise building or the like is flushed after use, the inside of the drain pipe 3 has a negative pressure. Since the intake valve 1 is attached to the upper end opening 4 of the top ventilation pipe 38 which is a part of the drain pipe 3, the intake valve 1 operates to suck outside air into the drain pipe 3, It is possible to prevent the trap formed on each toilet from breaking water.

When the inside of the drain pipe 3 is not in a negative pressure state, the intake port 14 is securely closed by the packing 9 attached to the valve body 8, and the air inside the drain pipe 3 is released. Since it is completely sealed, leakage of unpleasant odors such as sewage from a gap between the intake port 14 and the packing 9 can be prevented, so that the intake valve 1 can be disposed indoors.

Further, the valve body 8 has a circumferential surface portion 23 whose upper surface is inclined downward from the center toward the periphery.
And a generally frusto-conical conical portion 25 formed by a flat portion 24 having a flat central portion, so that miscellaneous components generated inside the drainage pipe 3 such as steam Alternatively, even if oil or the like drops on the upper surface of each valve element 8, these miscellaneous components flow down the peripheral surface 23 of the conical portion 25 of each valve element 8 and flow down to the opening 13. It is difficult for water droplets to adhere to the surface.

In the above-described embodiment, the position is symmetrical about the center of the opening 13 and the opening 13
Although a description has been given of the structure in which, for example, four corner corners along the circumference of the opening 13 are provided side by side and the intake port 14 is provided on the bottom surface 10 of the substrate member 11 of the valve body 7, The outside air is equally sucked from each intake port 14, but the intake port 14 may be formed at any position within the valve chamber 6. Further, the number of the intake ports 14 is not limited to four, and at least one or more may be formed.

Further, in the above embodiment, the shape of the bottom surface portion 10 of the valve body 7 of the intake valve 1 is substantially rectangular, but may be formed into an elliptical shape or the like.

Then, the fitting edge of the base member 11 of the valve body 7 is fitted.
Although the fitting edge portion 21 of the cover member 12 is fitted and adhered to the cover member 20, the valve body 8 may be detachably fitted so that each valve body 8 can be inspected and replaced.

[0044]

According to the first aspect of the present invention, since the packing is attached to the valve body while being separated from the lower end face of the valve body, there is always a gap between the packing and the lower end face of the valve body. Is formed, and the elasticity of the packing itself can be sufficiently exhibited.When the contact surface of the packing comes into contact with the valve seat due to the own weight of the valve body and the packing, the tightness between the packing and the valve seat is caused by the elastic deformation of the packing. Suffices to prevent odor from leaking from each intake port.Furthermore, even when the contact portion of the valve seat has some irregularities, the packing and the valve are deformed by the elastic deformation of the packing. Since the airtightness with the seat can be sufficiently ensured, the leakage of the odor from each intake port can be prevented.

[0045] According to the intake valve of the second aspect, the first aspect is the first aspect.
In addition to the effect of the described intake valve, since a plurality of intake ports are formed, when the inside of the drainage pipe is in a negative pressure state compared with the outside air pressure, the outside air is quickly sucked from the plurality of intake ports. And
Further, even if one of the valve bodies is damaged, the outside air is sucked by the other valve body, so that the intake valve body hardly stops functioning completely, and the repair and replacement cycle of the intake valve body is extended. .

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an intake valve of the present invention.

FIG. 2 is a sectional view showing the intake valve according to the first embodiment;

FIG. 3 is a sectional view showing the intake valve according to the first embodiment;

FIG. 4 is a sectional view showing the intake valve according to the first embodiment;

FIG. 5 is a plan view showing the intake valve;

FIG. 6 is a plan view showing the intake valve;

FIG. 7 is an explanatory diagram of drainage equipment to which an intake valve is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intake valve 3 Drainage pipe 6 Valve room 7 Valve body 8 Valve body 9 Packing 10 Bottom part of valve chamber 6 13 Opening 14 Inlet port 15 Valve seat 32 Lower end face of valve body 9 33 Contact surface of packing 9

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 24/00-24/06

Claims (2)

(57) [Claims] 1. A valve chamber, an opening formed in a bottom portion of the valve chamber and communicating with a drain pipe, and an intake port provided at least one opening in the bottom portion of the valve chamber for sucking outside air. And a valve body having a valve seat formed along the periphery of the intake port, a valve body mounted to be able to advance and retreat along the opening direction of the intake port, and separated from a lower end surface of the valve body. And mounted coaxially to the valve body, and opens and closes each of the intake ports by coming into contact with and separating from a valve seat of the valve body, and a contact surface on a lower surface side is in close contact with the valve seat at the closed position of the intake port. An intake valve comprising: a packing; 2. The intake valve according to claim 1, wherein a plurality of intake ports of the valve body are formed at symmetrical positions around the center of the opening of the valve body.