JP6886718B2 - Intake and exhaust valves - Google Patents

Description

The present invention relates to an intake / exhaust valve, and more specifically, an intake / exhaust performance is provided by obliquely forming the shape of a floating valve body and the corresponding shape of a valve box portion provided at the uppermost portion of a vertical pipe. Regarding a small intake / exhaust valve with improved.

In a water supply system such as an apartment house, an intake / exhaust valve is provided at the top of the vertical pipe to discharge air in the water pipe and suck air into the water pipe to stabilize the water supply and to stabilize the water supply. It is a mechanism to protect. The operation of the intake / exhaust valve is as follows. First, when the water pipe is filled with water, the air inside the water pipe is discharged until the inside of the intake / exhaust valve is full (exhaust at the time of filling). When the inside of the intake / exhaust valve is full, intake / exhaust is not performed (normal time). When the inside of the intake / exhaust valve is full and air accumulates, the air is discharged (exhaust under pressure). When the inside of the water pipe becomes negative pressure, air is sucked from the outside to destroy the negative pressure (intake). The intake / exhaust valve is responsible for stabilizing the water supply and protecting the water supply piping equipment by repeating the above operation.

Various techniques have been proposed for such intake / exhaust valves. For example, Patent Document 1 includes a large valve body provided with a casing and a lid having a large intake / exhaust port, and is provided on the large valve body to open and close the large intake / exhaust port by moving the inside of the casing up and down. Disclosed is an intake / exhaust valve having a small intake / exhaust port that can communicate with the exhaust port and a float that is connected to the large valve body via a lever below the large valve body and can move up and down according to the water level in the casing. ing. The large valve body is fitted into a cylindrical guide tube, and a plurality of guide ridges are provided around the outer peripheral surface of the guide tube. It becomes a ventilation path that communicates with.

The applicant of this application also manufactures an intake / exhaust valve using the same principle as the technique proposed in Patent Document 1 (see Non-Patent Document 1). As disclosed in Non-Patent Document 1, the intake / exhaust valve includes an intake / exhaust port provided on the upper part of the main body, an intake valve main body that moves up and down so as to open and close the intake / exhaust port inside the main body, and an intake valve main body. It is provided with an exhaust valve hole provided in the above, an exhaust valve piece that opens and closes the exhaust valve hole, a float that can move up and down according to the water level in the main body, and a lever plate that connects the float and the exhaust valve piece. The intake valve body and the exhaust valve piece are connected by a spring.

In this intake / exhaust valve, the air inside the water pipe is filled with water, and the intake valve body is lowered by the weight of the intake valve body, the lever plate, and the float until the water flows into the main body. Is discharged in large quantities. As the water flows into the main body, the intake valve main body rises, and finally the intake valve main body closes the intake / exhaust port. When the inside of the main body is full, the exhaust valve piece closes the exhaust valve hole by the force of the spring and the water pressure. At this time, the intake valve main body closes the intake / exhaust ports only by water pressure.

When the inside of the main body is full and the air in the water pipe enters the inside of the main body (below the intake valve main body), the water level inside the main body gradually drops, and the float drops accordingly. When the float is lowered, the weight of the float is added to the exhaust valve piece, and when the weight of the float becomes greater than the sum of the force due to the pressure difference between the inside of the main body and the atmospheric pressure and the force of the spring, the exhaust valve piece. Is separated from the exhaust valve hole, and the air inside the main body is discharged from the intake / exhaust port through the exhaust valve hole. When the air is discharged and becomes less, water flows into the main body, and the float rises as the water level rises. When the float rises, the weight of the float applied to the exhaust valve piece is reduced, and the exhaust valve piece closes the exhaust valve hole by the force of water pressure and the spring. By repeating the up and down of the float and the opening and closing of the exhaust valve hole in this way, the air in the water pipe is appropriately discharged. When the pressure inside the water pipe becomes lower than the atmospheric pressure when the water is cut off or when the water is drained, the pressure inside the main body drops, the intake valve main body goes down, and air is sucked from the intake / exhaust port.

Japanese Patent No. 4366564

Kogokin Seisakusho Co., Ltd. Technical data Rapid intake / exhaust valve LA3A-20A, 25A

Since the intake / exhaust valve of Non-Patent Document 1 by the present applicant has been developed for a long time, there is no problem in practical performance, but it is compared with the products of other companies developed after this intake / exhaust valve. Then, it is hard to say that the intake / exhaust performance is particularly excellent. Therefore, in order to maintain the competitiveness of the product, it is desired to further improve the intake / exhaust performance. However, in order to improve the intake / exhaust performance without changing the structure, the amount of air intake / exhaust must be increased by increasing the diameter of the product, and the outer shape of the intake / exhaust valve becomes large. become. However, the intake and exhaust valves of other companies have been miniaturized in recent years, and considering the measures for space saving in the living environment, it is urgent for the applicant to miniaturize the intake and exhaust valves.

Therefore, it is an object of the present invention to provide an intake / exhaust valve that achieves both improvement in intake / exhaust performance and miniaturization.

An object of the present invention is to provide an inclined portion in a portion of the valve box continuous with the intake / exhaust port, to form the shoulder portion of the floating valve body facing the inclined portion so as to have a shape corresponding to the inclined portion, and to allow the floating portion. This can be solved by providing a member that guides the floating valve body without tilting so that the shoulder portion of the valve body comes into contact with the entire inclined portion when the valve body rises.

The present invention provides an intake / exhaust valve connected to the uppermost part of a vertical pipe and for discharging air in a water pipe and sucking air into the water pipe. The intake / exhaust valve according to the present invention includes a valve box. The valve box has an intake / exhaust port at the top and a connection with a vertical pipe at the bottom. The inside of the valve box is provided with a float that moves up and down according to the water level inside the valve box, and a floating valve body that opens and closes the intake and exhaust ports of the valve box by moving up and down as the float moves up and down. .. The floating valve body is provided with a through hole for discharging the accumulated air. The float and the floating valve body are connected by an exhaust valve body and a support member. The exhaust valve body is connected to the float and opens and closes the through hole of the floating valve body as the float moves up and down. The support member supports the exhaust valve body on the floating valve body.

The valve box has a body portion having an inner diameter larger than the diameter of the intake / exhaust port and a shoulder portion continuous from the intake / exhaust port to the body portion. The shoulder portion has an inclined portion formed so that the inner diameter is continuously increased at least in a part from the intake / exhaust port to the body portion. The floating valve body has a valve shoulder portion having a shape corresponding to the inclined portion, and a guide for guiding the floating valve body so that it does not tilt because the valve shoulder portion is brought into contact with the inclined portion when the floating valve body is raised. Has a part.

In one embodiment, the guide portion is provided on the upper part of the floating valve body. The guide portion preferably has a plurality of plate-like bodies, each of which has an outer portion that moves along the inner edge of the intake / exhaust port of the valve box as the floating valve body moves up and down. It is more preferable that the guide portion is a plurality of polygonal plate-like bodies having an upright portion as an outer portion. In another embodiment, the guide portion is provided on the upper part of the floating valve body, and preferably has a plurality of rod-shaped bodies that move along the inner edge of the intake / exhaust port as the floating valve body moves up and down. ..

In one embodiment, the intake / exhaust valve preferably includes a water stop member arranged between the valve shoulder portion and the inclined portion, and this water stop member is provided in the inclined portion of the valve box in the circumferential direction. It is more preferable to be arranged in the groove.

In one embodiment, the intake and exhaust valves preferably further have a regulatory section that regulates the lowest position of the float. The regulatory unit can be a plurality of plate-like bodies provided on the inner wall of the valve box below the float, and one or more arranged so as to pass between the facing inner walls of the valve box below the float. It can also be a rod.

In one embodiment, the exhaust valve body may be a plate-like body having a through-hole contact portion that closes the through-hole at one end and a connecting portion with a float at the other end. In this case, the floating valve body is for regulating that the other end portion rises as the float rises and the other end portion rises further from the state in which the through hole close contact portion closes the through hole. It is preferable to have a stopper.

In one embodiment, the intake / exhaust valve is provided with one end having a first opening attached to the intake / exhaust port of the valve box, the other end having a second opening, and one end and the other end. It is preferable to further provide a cover having a bent portion arranged between the portions. It is preferable that the first opening and the second opening are arranged so that their central axes are orthogonal to each other. It is preferable that a part of the bent portion located on the central axis of the second opening has a flat portion formed at a predetermined angle with respect to the central axis of the second opening.

According to the present invention, the intake / exhaust performance can be improved without enlarging the outer shape as compared with the conventional intake / exhaust valve. An exhaust valve can be provided.

It is a vertical cross-sectional view of the intake and exhaust valve by one Embodiment of this invention. The movable members (floating valve body, exhaust valve body, support member and float) inside the intake / exhaust valve of FIG. 1 are shown, (a) is a partially cutout assembly perspective view, and (b) is an exploded perspective view. The regulation part of the present invention is shown, (a1) and (a2) are the plan view and the front sectional view of the regulation part of the plate-like body according to one embodiment, and (b1) and (b2) are rod-like according to another embodiment. It is a top view and a front sectional view of the regulation part of a body. It is a perspective view of the floating valve body by another embodiment of this invention. It is a vertical sectional view for demonstrating the operation of the intake / exhaust valve of FIG. 1, (a) is a state at the time of initial exhaust and intake, (b) is a state at the time of filling, (c) is a state at the time of exhaust under pressure. Indicates the state of.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a vertical sectional view of an intake / exhaust valve 1 according to an embodiment of the present invention. Further, FIG. 2 shows a floating valve body 30, a float 40, an exhaust valve body 50 and a support member 60 housed inside the intake / exhaust valve 1, and FIG. 2A is a partially cutaway assembly perspective view of these. b) is an exploded perspective view. Note that FIG. 1 is represented as a vertical cross-sectional view through which the rib 35 of the floating valve body 30, the rib 43 of the float 40, and the regulating portion 12d of the valve box 10 are aligned in the vertical direction. On the other hand, in the present embodiment, as shown in FIG. 2, the rib 35 and the guide portion 36 of the floating valve body 30 are arranged at positions displaced from each other in the circumferential direction of the floating valve body 30. Therefore, FIG. 1 is not represented as a cross-sectional view passing through the guide portion 36, and the guide portion 36 in FIG. 1 is drawn with a dotted line to show its existence.

(Valve box)
The intake / exhaust valve 1 includes a substantially cylindrical valve box 10 having an internal space 15. The valve box 10 has an intake / exhaust port 11a at the top thereof and a communication port 12a at the bottom thereof with a vertical pipe (not shown) of a water pipe. In this embodiment, the valve box 10 is composed of two parts, a valve box upper part 11 and a valve box lower part 12, and the upper end 12e of the valve box lower part 12 is fitted or screwed into the lower end 11h of the valve box upper part 11. Water is stopped between them by a water blocking member 13c, which typically uses an O-ring made of synthetic rubber.

The valve box upper portion 11 has a shoulder portion 11d extending from the wall 11a1 forming the intake / exhaust port 11a, and a body portion 11c continuing from the shoulder portion 11d. The inner diameter of the body portion 11c is larger than the diameter of the inner edge 11a2 of the intake / exhaust port 11a. The shoulder portion 11d has an inclined portion 11e whose inner diameter is continuously increased in at least a part from a portion adjacent to the wall 11a1 to a portion adjacent to the body portion 11c. At least a part of the valve shoulder portion 33 of the floating valve body 30 comes into contact with the entire inclined portion 11e.

A groove 11f is provided on the internal space 15 side in a part of the shoulder portion 11d, and it is preferable that the water blocking member 13a, which typically uses an O-ring made of synthetic rubber, is arranged in the groove 11f. The depth of the groove 11f and the size of the water blocking member 13a are preferably configured so that a part of the water blocking member 13a projects from the surface of the inclined portion 11e toward the internal space 15. With this configuration, when the valve shoulder portion 33 of the floating valve body 30, which will be described later, comes into contact with the inclined portion 11e, a part of the valve shoulder portion 33 comes into close contact with the entire water blocking member 13a. Can be deformed to reliably prevent water in the internal space 15 from leaking from the intake / exhaust port 11a.

The upper end 12e of the valve box lower portion 12 is fitted or screwed inside the lower end 11h of the valve box upper portion 11. The top portion 12e1 of the upper end 12e projects from the inner surface of the valve box lower portion 12 toward the internal space 15, and the top portion 12e1 is further downward on which the rib 35 of the floating valve body 30 is placed when the floating valve body 30 is lowered. It functions as a floating valve body stopper that regulates the movement of the valve body.

The valve box lower portion 12 has a body portion 12c and a connecting portion 12b extending from the lower end of the body portion 12c. The inner diameter of the connecting portion 12b is smaller than the inner diameter of the body portion 12c. The connecting portion 12b is connected to a vertical pipe, and the inside of the connecting portion 12b is a communication port 12a with the vertical pipe.

It is preferable that the regulating portion 12d is provided on the lower inner wall of the body portion 12c. The regulating unit 12d regulates the minimum position of the float so that the lower surface of the float 40 does not come into contact with the float 40 and move further downward when the float 40 is lowered, and the water between the internal space 15 and the communication port 12a is regulated. And function to form a flow path for air.

As shown in FIGS. 3 (a1) and 3 (a2), the restricting portion 12d is preferably two plate-shaped bodies protruding from the inner wall of the body portion 12c toward the internal space 15 side. In this embodiment, the number of plate-shaped bodies is two, but the number is not limited to this, and for example, three plate-shaped bodies provided at intervals of 120 ° in the circumferential direction of the body portion 12c or the like. , Four plate-like bodies provided at intervals of 90 ° from each other can also be formed. Further, the restricting portion 12d is not limited to the plate-like body, and in another embodiment, for example, as shown in FIGS. 3 (b1) and 3 (b2), the space between the facing inner walls of the body portion 12c is formed. It can also be a rod-shaped body arranged so as to pass. The number of rod-shaped bodies is not limited, and may be one or three or more, and the rod-shaped bodies may have a bent shape. Since the rod-shaped body has a smaller fluid resistance than the plate-shaped body, it contributes to the improvement of the intake performance.

Further, the position where the regulation portion 12d is provided is not limited to the body portion 12c. For example, a plurality of legs may be provided at the lower part of the float 40, and these may be used as a regulating unit. In this case, when the float 40 is lowered, the lower end of the leg comes into contact with the lower surface of the inner wall of the valve box lower portion 12, so that the lowering of the float 40 is stopped.

(cover)
A cover 20 that closes the intake / exhaust port 11a is attached to the top of the valve box 10. The cover 20 has one end 22 having a first opening 21 and the other end 24 having a second opening 23, and the one end 22 and the other end 24 are connected by a bent portion 25. The cover 20 is attached to the valve box 10 by fitting or screwing the wall 11a1 forming the intake / exhaust port 11a inside the one end portion 22 of the cover 20. A groove 11g is provided on the outer surface of the wall 11a1, and a water blocking member 13b, typically using an O-ring made of synthetic rubber, is arranged in the groove 11g, and is between the wall 11a1 and one end portion 22. Is stopped by the water blocking member 13b.

In the form in which the wall 11a1 is fitted inside the one end portion 22, it is preferable that the ring 14 that can be expanded and contracted in the radial direction is fitted into the groove 11j provided in the wall 11a1. The ring 14 is formed so as to shrink when the wall 11a1 is fitted into the one end portion 22 and expand when the fitting is completed. With this configuration, the cover 20 and the valve box 10 can be easily assembled, and the cover 20 can be prevented from falling off from the valve box 10. Further, since the cover 20 can rotate freely, the second opening 23 can be oriented in any direction.

The bent portion 25 is formed in a part of a portion that connects one end portion 22 having a substantially cylindrical shape and the other end portion 24 having a substantially cylindrical shape. The first opening 21 formed in the one end portion 22 and the second opening 23 formed in the other end portion 24 have two central axes orthogonal to the opening surfaces of the openings 21 and 23, respectively, at an angle with each other. It is preferable that they are arranged in a positional relationship where they intersect with each other, and it is more preferable that they are arranged in a positional relationship that is orthogonal to each other.

Further, it is preferable that the bent portion 25 has a flat portion 25a formed at an angle with respect to the central axis orthogonal to the opening surface of the first opening 21 in a part of the inner wall thereof. The flat surface portion 25a is preferably arranged so as to be located on a line of the central axis orthogonal to the opening surface of the second opening 23, and is preferably formed at a predetermined angle with respect to the central axis. This angle is more preferably 40 ° to 50 °, most preferably 45 °. By forming the flat surface portion 25a on a part of the inner wall of the bent portion 25 in this way, the air flowing in from the second opening 23 hits the flat surface portion 25a of the bent portion 25 and flows into the intake / exhaust port 11a at different angles. Therefore, the intake / exhaust performance can be improved.

(Floating valve body)
In the internal space 15 of the valve box 10, a floating valve body 30 capable of moving up and down in the internal space 15 is arranged. The floating valve body 30 has a valve upper portion 31 extending in a direction crossing the internal space 15, a cylindrical valve side portion 32 having a diameter larger than that of the valve upper portion 31, and an outer edge of the valve upper portion 31 and an upper end edge of the valve side portion 32. It has a continuous valve shoulder 33. The floating valve body 30 has an internal space 38, and the lower end is open, and the float 40 moves up and down in this internal space 38.

The valve shoulder portion 33 is formed so that at least a part thereof has a shape corresponding to the inclined portion 11e at a position facing the inclined portion 11e of the valve box 10 when the floating valve body 30 is at the uppermost portion. Therefore, it is possible to come into contact with the entire inclined portion 11e without a gap. Further, the valve shoulder portion 33 is formed so that at least another part thereof also comes into contact with the water blocking member 13a when the floating valve body 30 is at the uppermost portion. Therefore, when the floating valve body 30 rises with the rise of the float 40 due to the water flowing into the internal space 15 of the valve box 10, the valve shoulder portion 33 covers the entire inclined portion 11e and the entire water blocking member 13a. The intake / exhaust port 11a can be reliably closed by abutting.

In this embodiment, the valve shoulder portion 33 has an inclined portion abutting portion 33a that abuts on the inclined portion 11e of the valve box 10 and a water stopping member abutting portion 33b that abuts on the water stopping member 13a, and is inclined. A step is formed between the portion contact portion 33a and the water blocking member contact portion 33b. However, the shape of the valve shoulder portion 33 is not limited to this, and for example, the inclined portion contact portion 33a and the water stop member contact portion 33b may be formed on the same surface.

If the floating valve body 30 rises without tilting, the valve shoulder portion 33 surely contacts the entire inclined portion 11e, but if the floating valve body 30 rises while tilting for some reason, the valve shoulder portion 33 touches the entire inclined portion 11e. There is a possibility that a gap will be created without contact. Therefore, a plurality of guide portions 36 for guiding the floating valve body 30 are provided on the valve upper portion 31 so as to suppress the inclination when the floating valve body 30 rises and ensure that the valve shoulder portion 33 abuts on the entire inclined portion 11e. Provided. Each of the plurality of guide portions 36 has an outer portion 36a that moves along the inner edge 11a2 of the intake / exhaust port 11a as the floating valve body 30 moves up and down. The outer portion 36a is a portion of each of the plurality of guide portions 36 located on the outermost side in the radial direction of the floating valve body 30, and may be in any form such as a point shape, a side shape, a surface shape, and a protrusion shape. May be good.

Here, when the outer portion 36a moves along the inner edge 11a2, not only when all of the plurality of outer portions 36a abut on the inner edge 11a2 and move, but also the valve shoulder portion of the floating valve body 30. A part of the plurality of outer portions 36a moves away from the inner edge 11a2 within a range that allows the floating valve body 30 to incline to such an extent that the 33 does not prevent the floating portion 11e from reliably contacting the entire inclined portion 11e. Including cases. Further, when the outer portion 36a abuts on the inner edge 11a2 and moves, not only the two may come into contact with each other and move while sliding (that is, slide), but also the outer portion 36a may move in a slightly separated state. Including.

In this embodiment, the floating valve body 30 has six polygonal plate-shaped bodies 36 erected on the valve upper portion 31 as a guide portion. The plate-shaped body 36 has an upright side 36a rising vertically from the valve upper portion 31 as an outer portion. The plate-shaped body 36 is provided on the valve upper portion 31 so that each upright side 36a of the plate-shaped body 36 moves along the inner edge 11a2 of the intake / exhaust port 11a when the floating valve body 30 moves up and down. By providing the plate-shaped body 36 in this way, the floating valve body 30 rises while the upright side 36a substantially prevents the floating valve body 30 from tilting, so that the valve shoulder portion 33 covers the entire tilted portion 11e. Make sure to contact.

The number of guide portions 36 is not limited to 6 as long as the floating valve body 30 can be raised without tilting, and may be 5 or less or 7 or more. Further, the guide portion 36 is not limited to the plate-shaped body, and may be, for example, six rod-shaped bodies erected on the valve upper portion 31 of the floating valve body 30, as shown in FIG. The rod-shaped body is not limited to the rod-shaped body that stands upright as shown in FIG. 4, but bends in the middle, and any one point of the bent portion serves as the outer portion 36a along the inner edge 11a2 of the intake / exhaust port 11a. It may be a moving rod. Further, the outer portion 36a is not limited to the upright side, and moves along the inner edge 11a2 of the intake / exhaust port 11a as the floating valve body 30 moves up and down to prevent the floating valve body 30 from tilting. It may have any shape that can be used. The outer portion 36a may be a surface having a shape corresponding to the inner edge 11a2 of the intake / exhaust port 11a. Further, although not shown, for example, one rod-shaped body is formed on the central axis of the valve upper portion 31, and this one rod-shaped body is moved up and down along a guide portion formed on the valve box upper portion 11 or the cover 20. It may be configured to be movable.

It is preferable that the rib 31a is provided on the upper surface of the valve upper portion 31. The rib 31a can improve the strength of the valve upper portion 31 against the impact applied when the floating valve body 30 closes the intake / exhaust port 11a. The shape and arrangement position of the rib 31a are not particularly limited as long as the strength of the valve upper portion 31 can be improved. The rib 31a is preferably connected to the guide portion 36 as in the intake / exhaust valve 1 according to the present embodiment, but may be provided separately from the guide portion 36.

Six ribs 35 are provided on the valve side portion 32 of the floating valve body 30. Each of the ribs 35 has an end 35a and a step 35b. By moving the end portion 35a along the inner wall of the valve box 10, the movement of the floating valve body 30 in the left-right direction can be suppressed. Further, the step portion 35b restricts the downward movement of the floating valve body 30 by resting on the upper end portion 12e1 of the upper end 12e of the valve box lower portion 12 when the floating valve body 30 is lowered. Between the adjacent ribs 35, there is a space between the outer surface of the valve side portion 32 and the inner surface of the valve box 10, and this space is a flow path of air discharged or sucked through the intake / exhaust port 11a. It becomes. The number of ribs 35 is not limited to six, and may be five or less or seven or more as long as the movement of the floating valve body 30 in the left-right direction can be effectively suppressed. ..

The floating valve body 30 has a through hole 34 communicating the intake / exhaust port 11a and the internal space 38 at any position of the valve upper portion 31. The through hole 34 functions as an exhaust port for discharging the air accumulated in the internal space 38 to the intake / exhaust port 11a. The lower opening of the through hole 34 is opened and closed by the exhaust valve body 50 described later.

It is preferable that the stopper 37 is provided on the lower surface (internal space 38 side) of the valve upper portion 31 of the floating valve body 30. The stopper 37 is provided to regulate the movement of the exhaust valve body 50, and the details thereof will be described later together with the exhaust valve body 50. Further, the floating valve body 30 preferably has a support member mounting portion 39 for mounting the support member 60 that supports the exhaust valve body 50 near the through hole 34. Further, for the same purpose as the rib 31a, it is preferable that the rib 31b is also provided on the lower surface of the valve upper portion 31 of the floating valve body 30.

(float)
In the internal space 38 of the floating valve body 30, a float 40 that can move up and down in the internal space 38 is arranged. The float 40 has a float side portion 41 having a diameter smaller than the inner diameter of the floating valve body 30, and a float bottom portion 42 continuous with the lower end of the float side portion 41. The float side portion 41 is provided with four ribs 43 projecting outward from the surface thereof. These ribs 43 move along the inner wall of the floating valve body 30 (more preferably, along a guide rail (not shown) provided on the inner wall) when the float 40 moves up and down, and left and right of the float 40. It functions to suppress directional movement. Between the four ribs 43, there is a space between the outer surface of the float side 41 and the inner wall of the floating valve body 30, and this space rises from the water pipe to the inner space 15 of the valve box 10. It functions as a flow path for air and water.

The number of ribs 43 is not limited to four, and may be three or less or five or more as long as the movement of the float 40 in the left-right direction can be effectively suppressed. Further, the rib 43 is not limited to the length from the upper end to the lower end of the float side portion 41, and may be, for example, the length from the upper end to the middle of the float side portion 41.

The float 40 preferably has a space 44 inside. By providing the internal space 44, the weight of water can also be utilized when the float 40 descends. The internal space 44 preferably has a reinforcing rib 45 having a cross-shaped cross section that is passed between the inner surfaces of the float side portions 41 for the purpose of preventing the float 40 from being deformed.

The float 40 further preferably has a float shaft 46 for connecting the float 40 to the exhaust valve body 50 and a storage hole 47 for accommodating the float shaft 46. The float shaft 46 has a head portion 46a and a shaft portion 46b, and the head portion 46a is inserted into a connecting hole 53 of the exhaust valve body 50. In another embodiment, instead of providing the float shaft 46 and the accommodating hole 47, for example, a head 46a for directly connecting to the exhaust valve body 50 may be formed on the upper portion of the reinforcing rib 45 of the float 40. ..

(Exhaust valve body and support member)
The floating valve body 30 and the float 40 are connected to each other by the exhaust valve body 50 and the support member 60. The exhaust valve body 50 is supported by the floating valve body 30 by the support member 60, and functions to open and close the lower opening of the through hole 34 of the floating valve body 30 in response to the vertical movement of the float 40. The exhaust valve body 50 is a plate-shaped body, has a through hole contact portion 52 on one end portion 51a side, and is formed so that the head portion 46a of the float shaft 46 engages with the other end portion 51b side. It has a connecting hole 53. The through-hole contact portion 52 is preferably a packing made of synthetic rubber that closes the through-hole 34, but is not limited to this, as long as it can close the through-hole 34 in close contact. Good.

The exhaust valve body 50 is not limited to a plate-shaped body, for example, a pedestal on which a through-hole close contact portion 52 can be arranged is formed at one end, and a rod-shaped body is projected from the pedestal to form a rod-shaped body. The other end may be connected to the float 40. The point that the exhaust valve body 50 is connected to the float 40 is not limited to the form in which the exhaust valve body 50 is directly connected to the float 40 as in the present embodiment, and the exhaust is exhausted through some other connecting member. The valve body 50 may be connected to the float 40.

The support member 60 is preferably, but not limited to, an elastic member, and more preferably a double torsion spring. The support member 60 includes two first arm portions (first portions) 61, two coil portions (second portions) 62 continuous with one end of each of the first arm portions 61, and a coil portion. It has a second arm portion 63 extending from each of the 62, and a connecting portion 64 for connecting the ends of the second arm portion 63 to each other.

The other end of each of the first arm portions 61 of the support member 60 is attached to the support member attachment portion 39 of the floating valve body 30. The exhaust valve body 50 has protrusions 54 on each of both side portions, and the protrusions 54 are inserted into the space inside the coil portion 62. The second arm portion 63 extending from the coil portion 62 is preferably arranged on rails 55 provided on both side portions of the exhaust valve body 50. The connecting portion 64 connecting the ends of the second arm portion 63 connects the lower side of the exhaust valve body 50 (that is, the side opposite to the side of the through hole 34) from one side portion of the exhaust valve body 50 to the other. Passed across to the side of.

The exhaust valve body 50 operates so as to block the communication state of the through hole 34 by closing the lower end of the through hole 34 at the time of filling with water. Further, the exhaust valve body 50 operates so as to discharge the accumulated air through the through hole 34 by opening and closing the through hole 34 according to the pressure of the air accumulated in the internal space 38 at the time of exhausting under pressure. To do. The opening and closing of the through hole 34 is performed by using the contact portion between the lower end of the hole wall of the through hole 34 and the through hole contact portion 52 on the one end portion 51a side as a fulcrum so that the other end portion 51b moves up and down. Is performed by rotating. Therefore, the support member 60 can separately control the pressing force by which the exhaust valve body 50 is pressed upward against the through hole 34 and the opening / closing force by which the exhaust valve body 50 rotates to open and close the through hole 34. It is preferably configured so that it can be done. For example, in a double torsion spring, the elastic force due to the deflection generated in the first arm portion (first portion) 61 is in charge of the pressing force, and the torque generated in the coil portion (second portion) 62 is in charge of the opening / closing force. , These forces can be designed separately. In this way, by using the support member that is in charge of the pressing force and the opening / closing force separately, the optimum design of the exhaust performance is possible.

As described above, it is preferable that the stopper 37 is provided on the lower surface of the floating valve body 30. The stopper 37 is for regulating the other end portion 51b of the exhaust valve body 50 so as not to rise more than necessary. That is, in the exhaust valve body 50 used in the present embodiment, a through hole close contact portion 52 for closing the through hole 34 is arranged on one end portion 51a side, and the connecting hole 53 connected to the float 40 is the other end portion. It is a plate-like body arranged on the 51b side and having a predetermined length between one end portion 51a and the other end portion 51b. Therefore, when the other end 51b rises as the float 40 rises and the other end 51b rises further from the state where the through hole contact portion 52 closes the through hole 34, the other end 51b side. The lower end of the hole wall of the through hole 34 serves as a fulcrum, and one end 51a side of the exhaust valve body 50 descends, and a gap is formed between the lower end of the through hole 34 and the through hole contact portion 52 on the one end 51a side. As a result, water in the internal space 38 may leak from this gap. By providing a stopper 37 on the lower surface of the floating valve body 30, the rise of the other end portion 51b is restricted, and a gap is created between the lower end of the through hole 34 and the through hole contact portion 52 on the one end portion 51a side. Since it can be prevented from occurring, it is possible to prevent this water leakage.

[Operation of intake / exhaust valve]
Hereinafter, the operation of the intake / exhaust valve 1 according to the present invention having the structure as described above will be described. 5A and 5B are vertical cross-sectional views for explaining the operation of the intake / exhaust valve 1. FIG. 5A is a state at the time of initial exhaust and intake, FIG. 5B is a state at the time of filling, and FIG. 5C is a state under pressure. Indicates the state at the time of exhaust. The reference numbers of the respective parts are shown only in FIG. 5A so as not to complicate the drawings.

First, the float 40 is in a position of contacting the regulation portion 12d until the inside of the water pipe becomes full and water begins to flow into the internal space 15 of the valve box 10 (FIG. 5A). At this time, in the exhaust valve body 50 connected to the float 40, the other end portion 51b is lowered by the weight of the float 40. Further, in the floating valve body 30 connected to the exhaust valve body 50 by the support member 60, the step portion 35b of the rib 35 is the floating valve of the valve box 10 due to the weight of the floating valve body 30, the exhaust valve body 50 and the float 40. It is lowered to the position where it comes into contact with the body stopper 12e1. Therefore, in the process until the inside of the water pipe becomes full, the air in the water pipe passes through the communication port 12a, the regulation portion 12d, the rib 35, and the through hole 34, and passes through the intake / exhaust port 11a and the first. It is discharged from the second opening 23 via the opening 21. Since the inner surface of the shoulder portion 11d of the valve box 10 has an inclined structure (11e) and the corresponding valve shoulder portion 33 of the floating valve body 30 also has an inclined structure (33a, 33b), the intake / exhaust valve 1 has an inclined structure. Exhaust performance is improved compared to conventional intake and exhaust valves.

When water begins to flow from the water pipe into the internal space 15 of the valve box 10, the float 40 begins to rise. As the float 40 rises, the floating valve body 30 also rises, and finally, the valve shoulder portion 33 of the floating valve body 30 comes into contact with the inclined portion 11e of the valve box 10 and the water stop member 13a, and the intake / exhaust port 11a Is closed (FIG. 5 (b)). At this time, since the guide portion 36 provided in the floating valve body 30 rises along the inner edge 11a2 of the intake / exhaust port 11a, the floating valve body 30 can rise straight without tilting. The water that has flowed into the internal space 15 of the valve box 10 further passes between the ribs 43 of the float 40 and flows into the internal space 38 of the floating valve body 30. When water collects in the internal space 15 and the internal space 38 and the float 40 rises further, the exhaust valve body 50 has a through hole 34 due to the water pressure and the elastic force of the first arm portion 61 (see FIG. 2) of the support member 60. Close.

When the air in the water pipe enters the inside of the valve box 10 with the water accumulated in the internal spaces 15 and 38, the air starts to accumulate in the internal space 38 through the ribs 43 of the float 40. As air accumulates in the internal space 38, the water surface inside the valve box 10 gradually descends, and the float 40 descends accordingly. When the float 40 is lowered, the weight of the float 40 is added to the exhaust valve body 50, and the weight of the float 40 is the force due to the pressure difference between the inside of the valve box 10 and the atmospheric pressure and the force of the coil portion 62 of the support member 60. When it becomes larger than the sum of, the exhaust valve body 50 rotates, the through hole contact portion 52 separates from the through hole 34, and the air in the internal space 38 is discharged from the intake / exhaust port 11a through the through hole 34. (Fig. 5 (c)). When the air in the internal space 38 is discharged and becomes small, water flows into the inside of the valve box 10, and the float 40 rises again as the water surface rises. When the float 40 rises, the weight of the float 40 applied to the exhaust valve body 50 is reduced, and the force of the coil portion 62 rotates the other end portion 51b of the exhaust valve body 50 in the rising direction to bring the float into close contact with the through hole. The portion 52 closes the through hole 34 (FIG. 5 (b)). By repeating the opening and closing of the float 40 up and down and the through hole 34 (FIGS. 5 (b) and 5 (c)) in this way, the air in the water pipe is appropriately discharged. During this time, the floating valve body 30 keeps the intake / exhaust port 11a closed.

When the water is cut off or drained, the pressure inside the water pipe becomes lower than the atmospheric pressure. Then, the pressure inside the valve box 10 decreases and the floating valve body 30 lowers, so that the valve shoulder portion 33 separates from the inclined portion 11e and air is sucked from the intake / exhaust port 11a (FIG. 5A). .. The air sucked from the intake / exhaust port 11a passes between the ribs 35, the through hole 34, and the regulation portion 12d, and flows into the water pipe from the communication port 12a. Since the inner surface of the shoulder portion 11d of the valve box 10 has an inclined structure and the corresponding valve shoulder portion 33 of the floating valve body 30 also has an inclined structure, the intake / exhaust valve is similar to the exhaust performance at the time of initial exhaust. The intake performance of 1 is also improved as compared with the conventional intake / exhaust valve.

1 Intake / exhaust valve 10 Valve box 11 Valve box upper part 11a Intake / exhaust port 11a1 Wall forming intake / exhaust port 11a2 Inner edge of intake / exhaust port 11c Body 11d Shoulder 11e Inclined part 11f, 11g, 11j Groove 11h Lower end 12 Lower part of valve box 12a Communication port 12b Connection part 12c Body part 12d Restriction part 12e Upper end 12e1 Top part (floating valve body stopper)
13a, 13b, 13c Water stop member 14 Ring 15 Internal space 20 Cover 21 First opening 22 One end 23 Second opening 24 Other end 25 Bending part
30 Floating valve body 31 Valve upper part 31a, 31b Rib 32 Valve side part 33 Valve shoulder part 33a Inclined part contact part 33b Water stop member contact part 34 Through hole (exhaust port)
35 Rib 35a End 35b Step 36 Guide 36a Outer 37 Stopper 38 Internal Space 39 Support Member Mounting 40 Float 41 Float Side 42 Float Bottom 43 Rib 44 Internal Space 45 Reinforcing Rib 46 Float Shaft 46a Head 46b Shaft Part 47 Float shaft accommodating hole 50 Exhaust valve body 51a, 51b End part 52 Through hole Adhesion part 53 Connecting hole 54 Protrusion 55 Rail 56 Groove 60 Support member (double torsion spring)
61 1st arm part (1st part)
62 Coil part (second part)
63 2nd arm part 64 2nd arm connecting part

Claims (8)

An intake / exhaust valve that is connected to the top of the vertical pipe and discharges air from the water pipe and sucks air into the water pipe.
A valve box with an intake / exhaust port at the top and a connection with a vertical pipe at the bottom.
A float that moves up and down according to the water level inside the valve box,
A floating valve body that is provided with a through hole and opens and closes the intake / exhaust port by moving up and down as the float moves up and down.
An exhaust valve body that is connected to the float and opens and closes the through hole as the float moves up and down.
A support member for supporting the exhaust valve body to the floating valve body is provided.
The valve box has a body portion having an inner diameter larger than the diameter of the intake / exhaust port and a shoulder portion continuous from the intake / exhaust port to the body portion, and the shoulder portion is the body portion from the intake / exhaust port to the body portion. At least a part up to the portion has an inclined portion formed so that the inner diameter is continuously increased, and the inner diameter of the upper end of the inclined portion is the same as the diameter of the intake / exhaust port.
The floating valve body has a valve shoulder portion having a shape corresponding to the inclined portion, and a guide for guiding the floating valve body so that the valve shoulder portion abuts on the inclined portion when the floating valve body rises. An intake / exhaust valve having a part. The intake / exhaust valve according to claim 1, wherein the floating valve body has a valve upper portion having a diameter corresponding to the diameter of the intake / exhaust port at the upper end of the valve shoulder portion. The guide portion is provided in the valve top of the floating valve element to have the outer portion which moves along the inner edge of the suction-exhaust opening along with the vertical movement of the floating valve element, according to claim 2 Intake and exhaust valves described in. The intake / exhaust valve according to claim 3, wherein the outer portion is located at a position corresponding to the outermost side of the upper portion of the valve. The intake / exhaust valve according to claim 3 , wherein the guide portion is a plurality of polygonal plate-like bodies having an upright portion as the outer portion. The intake / exhaust valve according to any one of claims 1 to 5 , wherein a water blocking member is arranged between the valve shoulder portion and the inclined portion. The intake / exhaust valve according to claim 6 , wherein a groove in the circumferential direction is provided in the inclined portion, and the water blocking member is arranged in the groove. One end of the valve box having a first opening attached to the intake / exhaust port, the other end of the valve box having a second opening, and the other end of the valve box are arranged between the other end and the other end. Further provided with a cover having a bent portion
The first opening and the second opening are arranged so that their central axes are orthogonal to each other.
1 to 7 , wherein a part of the bent portion located on the central axis of the second opening has a flat portion formed at a predetermined angle with respect to the central axis of the second opening. The intake / exhaust valve according to any one of the above.

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