JP2015209960A - Vent valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vent valve device capable of making a valve opening operation of a valve body fast and realizing a function of the valve body in a superior manner.SOLUTION: A vent valve main body 11 is provided with a funnel-like valve seat 12 having a valve port 20 communicated with an outside area. At a lower part of the vent valve main body 11 is extended a connecting cylindrical part 15 connected to a vent pipe 17 branched from a drain pipe. A valve body 21 made of synthetic rubber is seated on the valve seat 12. In addition, a lid 29 forming a valve chamber is fitted on the valve seat. The valve body 21 is held at its one end between the valve seat 12 and the lid 29 and at the other end is formed with a recess 25 to form an opening or closing part 27 adjacent to the recess 25. Then, when a negative pressure is generated in the valve chamber, the opening or closing part 27 is opened to cause the surrounding air to be flowed in.

Description

  In the present invention, for example, when drainage suddenly flows in a drainage pipe of a building and the inside of the drainage pipe reaches a negative pressure state, the valve body supported by the valve seat is opened by the negative pressure and the drainage pipe enters the drainage pipe. The present invention relates to a vent valve device for sucking outside air (air) to eliminate a negative pressure state.

  The drainage pipes provided in the building are connected to drainage facilities such as a restroom, kitchen, and bath. These drainage facilities are each provided with a drainage trap in order to prevent odors from rising in the drainage pipe. However, if the drainage water suddenly flows in the drainage pipe, the inside of the drainage pipe becomes negative pressure, the sealing water of the drain trap is sucked out and flows out, and odor may flow into the room from the drainage pipe . For this reason, a vent pipe communicating with the drain pipe is provided by branching from the drain pipe, and a vent valve is provided at the opening of the vent pipe to eliminate the negative pressure state in the drain pipe.

  As this type of vent valve, for example, a drain vent valve is disclosed in Patent Document 1. That is, this drainage vent valve is a valve that forms a valve chamber inside a connecting pipe connected to the vent pipe, an annular wall inclined in a funnel shape at the top of the connecting pipe, and an upper part of the annular wall. With a box. The annular wall is provided with a valve port communicating with the outside, a valve seat is provided on the valve chamber side of the valve port, and a valve body having a fulcrum at the upper part of the valve seat and capable of swing opening and closing is seated on the valve seat. It is configured as follows.

  When the valve body is always in close contact with the valve seat and the inside of the drain pipe reaches a negative pressure state, the valve body is separated from the valve seat and sucks the outside air, and the negative pressure in the vent pipe is eliminated. The trap is configured to function well.

Japanese Patent Laid-Open No. 10-103549

  In the drainage vent valve of the conventional configuration described in Patent Document 1, the valve body has a fulcrum at the upper part of the valve seat, and the lower part swings and opens. That is, when the negative pressure is reached in the valve chamber, the entire bottom edge of the valve element is lifted uniformly to open. For this reason, when the valve body is thick or when the valve body is not elastic enough, the valve opening operation may be delayed or the valve body may not open smoothly. There has been a problem that the function of the valve body may not be sufficiently exhibited.

  Therefore, an object of the present invention is to provide a vent valve device that can quickly open the valve body and can satisfactorily exhibit the function of the valve body.

  To achieve the above object, a vent valve device according to a first aspect of the present invention includes a vent valve body provided with a funnel-shaped valve seat having a valve port communicating with the outside, and is extended from the vent valve body. A vent valve device comprising: a connecting cylinder portion connected to a vent pipe branched from a drain pipe; a valve body seated on the valve seat; and a lid body that covers the valve seat and forms a valve chamber. The valve body has one end portion sandwiched between the valve seat and the lid body, and a notch portion is provided at the other end portion to form an opening / closing portion facing the notch portion, When the negative pressure is generated, the opening / closing part opens to allow the outside air to flow in.

According to a second aspect of the present invention, the vent valve device according to the first aspect of the present invention is characterized in that the valve body is integrally formed.
According to a third aspect of the present invention, the vent valve device according to the first or second aspect of the present invention is characterized in that the notches of the valve body are provided at three or four locations.

  According to a fourth aspect of the present invention, in the vent valve device according to any one of the first to third aspects, the notches of the valve body are provided at equal intervals in the circumferential direction. It is characterized by.

A vent valve device according to a fifth aspect of the invention is characterized in that, in the invention according to any one of the first to fourth aspects, the opening and closing part of the valve body is a thin part thinner than other parts. To do.
A vent valve device according to a sixth aspect of the present invention is the vent valve device according to any one of the first to fourth aspects, wherein a thin portion is formed at an intermediate portion between the notches of the valve body, and The valve opening of the valve seat is formed so as to face the thin part of the valve body, and when a positive pressure is generated in the valve chamber, the thin part of the valve body bulges outward and at the same time the opening and closing part opens to open the valve chamber. A feature is that the gas is exhausted to the outside.

  According to the vent valve device of the present invention, there is an effect that the valve body can be opened quickly and the function of the valve body can be exhibited well.

The disassembled perspective view which shows the vent valve apparatus connected to a vent pipe in the vent valve apparatus of 1st Embodiment. Sectional drawing which shows a vent valve apparatus. (A) is a top view which shows the valve body of a vent valve apparatus, (b) is a side view which shows a valve body. The perspective view which shows the cover body of a vent valve apparatus. The top view which shows a ventilation valve main body. The perspective view which shows the ventilation valve apparatus of the state which removed the cover body. The perspective view which shows the effect | action of a vent valve apparatus. The top view which shows a vent valve main body in the vent valve apparatus of 2nd Embodiment. The top view which shows the valve body of a vent valve apparatus. The perspective view which shows the ventilation valve apparatus of the state which removed the cover body. The perspective view which shows the effect | action of a vent valve apparatus. Sectional drawing which shows the vent valve apparatus of another example of this invention. The ventilation valve apparatus of the further another example of this invention is shown, (a) is sectional drawing which shows a valve seat, (b) is sectional drawing which shows a valve body. Sectional drawing which shows the state in the middle of assembling a valve body to a valve seat. FIG.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.
As shown in FIGS. 1 and 2, a vent valve main body 11 constituting the vent valve device 10 is formed of a synthetic resin, and the vent valve main body 11 is a cylindrical valve having an inverted frustoconical shape whose diameter increases upward. A seat 12 is provided. A flange portion 13 is provided at an upper end portion of the valve seat 12, and engagement convex portions 14 are formed at a plurality of locations (three locations in the first embodiment) on the outer surface of the flange portion 13.

  A cylindrical connecting tube portion 15 extends below the valve seat 12, and a small-diameter tube portion 16 shorter than the connecting tube portion 15 is integrally formed on the inner side. Then, a vent pipe 17 branched from the drain pipe is fitted inside the connecting cylinder portion 15, and a tip end portion of the vent pipe 17 is inserted into an annular recess 18 between the connecting cylinder portion 15 and the small diameter cylinder portion 16. It is configured as follows. The adhesive applied between the outer peripheral surface of the vent pipe 17 and the inner peripheral surface of the connecting cylinder portion 15 is prevented from entering the vent valve main body 11.

  In addition, as shown by the two-dot chain line in FIG. 2, when the vent pipe 17 is fitted on the outside of the connecting cylinder part 15, the outer peripheral surface of the connecting cylinder part 15 is formed in a tapered shape whose diameter increases toward the upper part. Therefore, the vent pipe 17 is inserted to a depth at which the inner diameter substantially matches the outer diameter of the connecting cylinder portion 15. In this case, by providing the small-diameter cylindrical portion 16 on the inner side of the connecting cylindrical portion 15 and forming the annular concave portion 18, it is possible to suppress insects that propagate along the inner surface of the vent pipe 17 from entering the valve seat 12.

  As shown in FIGS. 2 and 5, a plurality of vertically long partition projections 19 are provided at the lower part of the inner peripheral surface of the valve seat 12. The partition ridges 19 are provided so as to correspond to the positions of the engaging projections 14 provided on the outer peripheral surface of the valve seat 12. The valve seat 12 is opened with a large number of valve ports 20 having a vertically long rectangular shape so as to communicate with the outside at regular intervals in the circumferential direction. The valve port 20 is formed in a tapered shape having a wide inner surface side and a narrow outer surface side.

  As shown in FIGS. 1 and 2, a valve body 21 integrally formed of an elastic material such as synthetic rubber is seated on the valve seat 12. That is, between the valve openings 20 of the valve seat 12 is a support rib 22, and the valve body 21 is seated on the support rib 22. The valve body 21 is formed in a cylindrical shape having an inverted frustoconical shape so that its diameter increases toward the upper side. A flange 23 is provided at the upper end portion thereof, and a folded portion 24 is provided at the outer peripheral edge of the flange 23. . The flange 23 and the folded portion 24 of the valve body 21 are configured to engage with the flange portion 13 of the valve seat 12. As the synthetic rubber forming the valve body 21, for example, ethylene / propylene / diene copolymer rubber (EPDM), silicone rubber or the like is used.

  As shown in FIGS. 3 (a) and 3 (b), the lower end portion of the valve body 21 is formed with three notches 25 which are notched in a vertically long rectangular shape at equal intervals in the circumferential direction. Yes. As shown in FIG. 6, the partition rib 19 of the valve seat 12 protrudes from the notch 25 of the valve body 21 in a state in which the valve body 21 is seated on the valve seat 12, and the valve body 21. Is positioned relative to the valve seat 12.

  An opening / closing part 27 is provided at the corner of the valve body 21 facing the notch 25 to open and allow outside air to flow when a negative pressure is generated in a valve chamber 26 described later. As shown in FIG. 7, the opening / closing portion 27 has a lower end edge and a side edge on the side of the notch portion 25, which are free ends, and therefore the lower end edge of the opening / closing portion 27 due to negative pressure in the valve chamber 26. The side edge is turned up and the valve body 21 is easy to open. In this valve-opened state, the opening / closing part 27 of the valve body 21 is formed in an arcuate shape with a cross section in an oblique 45 ° direction from the intersection of its lower edge and side edge. Further, when the negative pressure in the valve chamber 26 is eliminated, the opening / closing part 27 of the valve body 21 is closed by the elastic force of the valve body 21 and is pressed against the valve seat 12, thereby improving the valve closing function. it can.

  The opening / closing portion 27 is configured to always close in close contact with the valve seat 12 and to open as shown in FIG. 7 only during negative pressure in the valve chamber 26. The notches 25 of the valve body 21 and the partition ridges 19 of the valve seat 12 are preferably provided at three or four locations in order to exhibit the valve closing function and the valve opening function of the valve body 21 in a balanced manner. If the notch 25 of the valve body 21 and the partition projection 19 of the valve seat 12 are two places, the valve opening function or the valve closing function of the valve body 21 may not be able to sufficiently cope with the negative pressure in the valve chamber 26, At five or more locations, the configuration of the vent valve device 10 becomes complicated, and the opening / closing portion 27 of the valve body 21 tends to be excessively formed.

  The valve body 21 preferably has a thickness of 0.5 to 2.0 mm, more preferably 0.7 to 1.5 mm in order to satisfactorily perform the valve closing function and the valve opening function. . When the thickness of the valve body 21 is less than 0.5 mm, the valve closing function of the valve body 21 may not be fully exhibited, and the valve may be opened carelessly and odor may leak to the outside. . On the other hand, when the thickness of the valve body 21 is thicker than 2.0 mm, there is a case where the valve opening function cannot be satisfactorily performed, and the negative pressure in the vent pipe 17 is not opened when the negative pressure in the valve chamber 26 is not opened. May not be eliminated and the drain trap may not function.

  The opening / closing portion 27 is provided with a thin triangular portion 28 having a front triangular shape formed thinner than other portions of the valve body 21. By forming the opening / closing part 27 with the thin part 28, the valve body 21 can be easily deformed and smoothly opened as the inside of the valve chamber 26 shifts to the negative pressure state. The thickness of the thin portion 28 is only required to be slightly thinner than other portions of the valve body 21, and the specific thickness is appropriately set according to the material, shape, etc. of the valve body 21.

  As shown in FIGS. 2 and 4, a lid 29 is fitted on the valve seat 12 so that a flange 23 of the valve body 21 is sandwiched, and a valve chamber 26 is formed inside. . The lid body 29 has a cylindrical shape with a lid, and engagement recesses 30 are formed at three positions at equal intervals in the circumferential direction on the inner circumferential surface thereof. When the lid 29 is fitted on the valve seat 12, the engagement convex portion 14 of the valve seat 12 is engaged with the engagement concave portion 30 of the lid 29, and the lid 29 is fixed on the valve seat 12. It has come to be. A mark 31 projects from the outer peripheral surface of the lid 29 corresponding to the circumferential position where the engagement concave portion 30 is provided on the inner peripheral surface of the lid 29, and the position of the engagement concave 30 is visually recognized from the outside. It is configured to be able to.

The operation of the vent valve device 10 of the first embodiment configured as described above will be described.
Now, as shown in FIG. 6, when drainage equipment is used and drainage flows through the drain pipe in a normal state, the inside of the valve chamber 26 is kept at the same normal pressure as the outside air. The opening / closing part 27 is supported in contact with the valve seat 12, and the vent valve is in a closed state. Therefore, the sealing water of the drain trap in each drainage facility does not flow out, and there is no possibility that the odor leaks to the outside.

At this time, since the valve body 21 is formed of synthetic rubber, which is an elastic material, the opening / closing part 27 is brought into close contact with the valve seat 12, and the valve closing function is exhibited well.
As shown in FIG. 7, for example, when drainage rapidly flows in the drainage pipe due to the use of drainage equipment, negative pressure is generated upstream of the drainage pipe, and the inside of the valve chamber 26 reaches a reduced pressure state. As a result, the opening / closing part 27 of the valve body 21 is turned up from the corner, and is separated from the valve seat 12 to form an opening, so that the vent valve is opened. For this reason, as shown by the arrows in FIG. 7, outside air is sucked into the valve chamber 26 from the valve port 20 of the valve seat 12 through the opening / closing part 27 of the valve body 21, and the outside air flows from the connecting cylinder part 15 to the vent pipe 17. It flows to the drain pipe through.

  At this time, the opening / closing part 27 of the valve body 21 is provided at the corner facing the notch 25 at the lower end part of the valve body 21, and only the opening / closing part 27 located at the corner part of the lower end part of the valve body 21 is provided. Is configured to open from its lower end edge and side end edge, the valve opening performance of the valve body 21 is enhanced. On the other hand, the conventional valve body is configured such that the entire lower part swings and opens. For this reason, the valve body 21 of the first embodiment can perform the valve opening operation quickly following the change in the degree of decompression in the valve chamber 26 as compared with the conventional valve body, and the function of the valve body 21 is manifested. Is excellent.

  In addition, since the opening / closing part 27 of the valve body 21 is formed of a thin part 28 thinner than the other parts and is easily deformed, the opening / closing part 27 opens more rapidly according to the degree of decompression in the valve chamber 26. Can be said.

  Therefore, the decompression state in the drain pipe is eliminated, and the leakage of odor is suppressed without affecting the sealing water of each drain trap. Thereafter, when the inside of the drain pipe returns to the normal pressure, the inside of the valve chamber 26 also returns to the normal pressure, and the opening / closing part 27 of the valve body 21 is lowered by the elastic force of the valve body 21 and returns onto the valve seat 12 to be in close contact with each other. The ventilation valve is closed, and leakage of odors to the outside is suppressed. In this case, since the opening / closing part 27 is provided at the corner of the valve body 21 and the elastic force of the valve body 21 acts strongly, the valve closing performance of the valve body 21 is enhanced. On the other hand, since the conventional valve body opens and closes with the pinched portion between the valve seat and the lid as a fulcrum, the elastic force of the valve body does not work sufficiently compared to the valve body 21 of the first embodiment.

The effects exhibited by the above first embodiment will be described collectively below.
(1) In the vent valve device 10 according to the first embodiment, the valve body 21 has one end sandwiched between the valve seat 12 and the lid 29 and a notch 25 at the other end. An opening / closing part 27 is formed so as to face the notch part 25 provided. For this reason, when a negative pressure is generated in the valve chamber 26, the opening / closing portion 27 of the valve body 21 is easy to open, and outside air quickly flows into the valve chamber 26 from the opening / closing portion 27.

Therefore, according to the vent valve device 10 of the first embodiment, there is an effect that the valve body 21 can be opened quickly and the function of the valve body 21 can be exhibited well.
(2) The valve body 21 is integrally formed. Accordingly, the configuration of the valve body 21 can be simplified, the valve body 21 can be easily manufactured, and the valve body 21 can be easily assembled to the valve seat 12.

(3) It is preferable that the notch part 25 of the said valve body 21 is provided in three places or four places. In this case, the valve opening function and the valve closing function of the valve body 21 can be exhibited with a good balance.
(4) The notches 25 of the valve body 21 are provided at equal intervals in the circumferential direction of the valve body 21. For this reason, the opening / closing function by the several opening / closing part 27 of the valve body 21 can be performed equally, and the function expression of the valve body 21 can be improved as a whole.

  (5) The opening / closing part 27 of the valve body 21 is a thin part 28 thinner than other parts. For this reason, the opening / closing part 27 of the valve body 21 can be easily deformed, and the valve opening operation and the valve closing operation can be performed with high sensitivity corresponding to the pressure in the valve chamber 26.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, parts different from the first embodiment will be mainly described.

  As shown in FIG. 8, one of the valve openings 20 opened in the valve seat 12 is a large-area pressurizing valve opening 20a having a size corresponding to approximately three of the valve openings 20 of the first embodiment. It has become. As shown in FIG. 9, a pressurizing thin portion 28a having a position and a size corresponding to the pressurizing valve port 20a of the valve seat 12 is formed in an intermediate portion between the notches 25 of the valve body 21. .

  As shown in FIG. 10, when the valve body 21 is seated on the valve seat 12, the pressurizing thin portion 28 a of the valve body 21 is disposed to face the pressurizing valve port 20 a of the valve seat 12. In the second embodiment, the thin-walled portion 28 provided in the opening / closing portion 27 of the valve body 21 of the first embodiment is not provided.

  As shown in FIG. 11, when a part of the drain pipe is clogged due to the use of the drainage facility, a positive pressure is generated upstream of the drain pipe, and the inside of the valve chamber 26 is in a pressurized state. At this time, a pressurizing thin portion 28a is provided in a part of the valve body 21 with a wide area, and the valve seat 12 is provided with a pressurizing valve port 20a having a large area so as to face the pressurizing thin portion 28a. It has been.

  For this reason, the pressurizing thin portion 28a of the valve body 21 bulges outward in response to the pressure in the valve chamber 26, and at the same time, the reaction unit opens and closes the opening / closing portion 27 of the valve body 21 from its corner, The ventilation valve is opened. As a result, as shown by the arrow in FIG. 11, the gas in the vent pipe 17 that has been pressurized is exhausted from the valve chamber 26 to the outside through the opening / closing part 27 of the valve body 21. Accordingly, the pressurized state in the vent pipe 17 and further in the drain pipe is canceled and the pressure returns to normal pressure, and leakage of odor to the outside is suppressed.

  Therefore, according to the vent valve device 10 of the second embodiment, the valve element 21 performs the valve opening operation not only when the inside of the drain pipe reaches the reduced pressure state but also when the inside of the drain pipe reaches the pressurized state. It is possible to perform the function of the valve body 21 more satisfactorily.

It should be noted that the embodiments described above can be modified and embodied as follows.
As shown in FIG. 12, in the second embodiment, the pressurizing valve port 20a of the valve seat 12 is omitted, and the lower portion of the support rib 22 of the valve seat 12 in the portion corresponding to the pressurizing valve port 20a is outside. The bulging space 32 may be formed between the support rib 22 and the valve body 21 seated on the valve seat 12.

  In this case, when the inside of the valve chamber 26 reaches a pressurized state, the pressurizing thin portion 28a of the valve body 21 swells into the bulging space portion 32, and at the same time, the opening / closing portion of the valve body 21 is recoiled. 27 is turned up and opened from the corner, and the vent valve is opened.

  As shown in FIG. 13 (a), the valve seat 12 formed in a funnel shape is set at an inclination angle α, and as shown in FIG. 13 (b), the funnel-shaped valve element 21 is set at an inclination angle β. The inclination angle β may be larger than the inclination angle α (α <β). In this case, as shown in FIG. 14, the lower end portion of the valve body 21 contacts the valve seat 12 during the assembly of the valve body 21 to the valve seat 12, and when the assembly is completed, the valve body 21 is moved to the valve seat 12. Is pressed against. Therefore, the valve closing function by the opening / closing part 27 of the valve body 21 can be enhanced.

The valve body 21 may be divided into a plurality of parts. For example, the valve body 21 may be divided into three at the cutout portion 25.
Instead of forming the opening / closing part 27 of the valve body 21 with the thin part 28, the hardness of the material forming the opening / closing part 27 may be lower than the hardness of other parts.

In the second embodiment, the thin portion 28 may be formed in the opening / closing portion 27 of the valve body 21.
The valve port 20 provided in the valve seat 12 may be provided only in the vicinity of the partition ridge 19. That is, the valve port 20 may be provided only in the vicinity of the opening / closing part 27 of the valve body 21 seated on the valve seat 12.

-You may form the shape of the thin part 28 which forms the opening-and-closing part 27 of the said valve body 21 in front square shape, front pentagon shape, etc.
The valve seat 20 of the valve seat 12 may be formed in a tapered shape having a wide outer surface and a narrow inner surface, or the taper may be omitted.

  DESCRIPTION OF SYMBOLS 10 ... Venting valve apparatus, 11 ... Venting valve main body, 12 ... Valve seat, 15 ... Connecting cylinder part, 17 ... Venting pipe, 20 ... Valve port, 21 ... Valve body, 25 ... Notch part, 26 ... Valve chamber, 27 ... Opening / closing part, 28 ... thin part, 29 ... lid.

Claims (6)

A vent valve body provided with a funnel-shaped valve seat having a valve port communicating with the outside, a connecting cylinder portion extending from the vent valve body and connected to a vent pipe branched from a drain pipe, and the valve seat A vent valve device comprising a valve body to be seated on and a lid body that covers the valve seat and forms a valve chamber,
The valve body has one end portion sandwiched between the valve seat and the lid body, and a notch portion is provided at the other end portion to form an opening / closing portion facing the notch portion, and a negative pressure is generated in the valve chamber. A vent valve device characterized in that when it occurs, the opening and closing part opens to allow outside air to flow in. The vent valve device according to claim 1, wherein the valve body is integrally formed. The vent valve device according to claim 1 or 2, wherein the notches of the valve body are provided at three or four locations. The vent valve device according to any one of claims 1 to 3, wherein the notches of the valve body are provided at equal intervals in the circumferential direction. The vent valve device according to any one of claims 1 to 4, wherein the opening and closing part of the valve body is a thin part thinner than other parts. When a thin part is formed in the middle part between the notches of the valve body, and the valve port of the valve seat is formed to face the thin part of the valve body, when the positive pressure is generated in the valve chamber 5. The structure according to claim 1, wherein the thin-walled portion of the valve is configured to bulge outward and simultaneously open and close to open and exhaust the gas in the valve chamber to the outside. Vent valve device.