JPWO2020111057A1 - Exhaust valve - Google Patents

Abstract

The exhaust valve (100) includes a casing (1), a valve seat (4), a float receiver (6), and a float (5). The float (5) is located at the initial position, which is the position on the float receiver (6), when the fluid does not flow into the casing (1), the valve port (41) is opened, and the inflow port (5) is opened. When the gas flows into the casing (1) from 31), the outflow of gas from the outlet (32) is allowed with the valve port (41) open, while the casing (1) is allowed to flow out from the inlet (31). When the liquid flows into the inside, it floats by the buoyancy of the liquid and closes the valve port (41) to prevent the liquid from flowing out from the outlet (32). The float receiver (6) is configured so that the initial position can be adjusted by changing the distance to the valve seat (4).

Description

The technology disclosed herein relates to an exhaust valve.

Conventionally, an exhaust valve has been known that allows a gas to pass when a gas flows in and blocks the passage of the liquid when a liquid flows in. For example, Patent Document 1 discloses an exhaust valve in which a valve seat and a float are housed in a casing. When gas flows into the exhaust valve, the float is separated from the valve seat and gas flow is allowed. On the other hand, when the liquid flows into the exhaust valve, the float floats according to the liquid level and closes the valve opening to prevent the liquid from flowing out.

Jikkai Sho 63-12692

In the exhaust valve as described above, the float can move relatively freely in the casing so as to open and close the valve opening depending on whether the fluid flowing into the casing is a gas or a liquid. That is, the float opens and closes the valve opening according to the flow of the fluid flowing into the casing. Therefore, there is a risk that the float accidentally closes the valve opening earlier than the timing when the valve opening should be closed. In that case, the expected exhaust cannot be achieved. On the contrary, the float may close the valve opening accidentally later than the timing when the valve opening should be closed. In that case, the liquid will flow out from the exhaust valve.

The technique disclosed herein has been made in view of this point, and its purpose is to strike a balance between the proper discharge of gas and the prevention of liquid discharge.

The exhaust valve disclosed herein includes a casing in which an inflow port and an outflow port are formed, a valve seat provided between the inflow port and the outflow port in the casing, and a valve seat having a valve port, and the inside of the casing. In the float receiver arranged on the inflow side of the valve seat and below the valve seat, and the float receiver arranged movably between the valve seat and the float receiver in the casing. A float that opens and closes the valve port is provided, and the float is located at an initial position that is a position on the float receiver when no fluid has flowed into the casing, and the valve port is opened. When a gas flows into the casing from the inflow port, the outflow of gas from the outlet is allowed with the valve port open, while when a liquid flows into the casing from the inflow port, the liquid The float receiver is configured to be able to adjust the initial position by changing the distance to the valve seat. ..

According to the exhaust valve, it is possible to balance the proper discharge of gas and the prevention of discharge of liquid.

FIG. 1 is a cross-sectional view of an exhaust valve in a state where the valve is open and the float is located at an initial position. FIG. 2 is a cross-sectional view of the exhaust valve in the closed state. FIG. 3 is a cross-sectional view of the exhaust valve in line III-III of FIG. FIG. 4 is a cross-sectional view of the exhaust valve in a state where the initial position of the float is changed from the position of FIG. FIG. 5 is a piping diagram of the water supply system. FIG. 6 is a cross-sectional view of the exhaust valve according to the second embodiment. FIG. 7 is a cross-sectional view of the exhaust valve according to the third embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the drawings.

<< Embodiment 1 >>
FIG. 1 is a cross-sectional view of the exhaust valve 100 in the opened state according to the first embodiment. FIG. 2 is a cross-sectional view of the exhaust valve 100 in the closed state. In FIGS. 1 and 2, the float 5 is drawn not as a cross-sectional view but as a front view (hereinafter, the same applies to the cross-sectional view of the exhaust valve).

The exhaust valve 100 causes the gas to flow out when a gas such as air flows in, while prevents the fluid from flowing out when a fluid such as water flows in. For example, the exhaust valve 100 is used when a large amount of initial air at the beginning of water supply is discharged from a pipe or the like.

The exhaust valve 100 includes a casing 1, a valve seat 4, a float 5, and a float receiver 6.

The casing 1 is formed with an inflow port 31 through which the fluid flows in, an outflow port 32 through which the fluid flows out, and a valve chamber 27. The casing 1 is formed with a flow path 33 through which the fluid flowing in from the inflow port 31 flows toward the outflow port 32. The inflow port 31 is arranged below the inflow port 32.

Specifically, the casing 1 has a tubular peripheral wall 11a that partitions a part of the valve chamber 27. The casing 1 may further have a ceiling 17 that partitions a part of the valve chamber 27 and closes one end of the peripheral wall 11a in the axial direction. More specifically, the casing 1 has a first casing 11 and a second casing 12. The first casing 11 has a tubular peripheral wall 11a extending in the direction of the axis X. The first casing 11 is formed with a first opening 14 and a second opening 15 at both ends in the direction of the axis X, respectively. The first opening 14 is the inflow port 31. A male screw is formed at the end of the outer peripheral surface of the first casing 11 on the side of the second opening 15.

The second casing 12 is formed in a bottomed cylindrical shape extending in the direction of the axis X. The second casing 12 has an opening 16 that opens in the direction of the axis X. The opening 16 is the outlet 32. The bottom of the second casing 12 forms the ceiling 17. A communication hole 18 is formed through the ceiling 17. The communication hole 18 is continuous with (that is, is in communication with) the opening 16.

The second casing 12 is arranged at the end of the first casing 11 on the second opening 15 side so that the ceiling 17 closes the second opening 15. The second casing 12 is attached to the first casing 11 by attaching the union nut 19 to the end of the first casing 11 on the side of the second opening 15. Inside the first casing 11 and the second casing 12, a flow path 33 is formed by an inflow port 31, a valve chamber 27, and an outflow port 32.

The valve seat 4 is provided in the valve chamber 27 (that is, between the inflow port 31 and the outflow port 32 in the casing 1). The valve seat 4 is attached to the ceiling 17. The valve seat 4 is screwed to the communication hole 18 of the second casing 12 from the first casing 11 side. The valve seat 4 is formed through the valve opening 41. The valve port 41 communicates the valve chamber 27 with the outlet 32.

The float receiver 6 is arranged in the casing 1 on the inflow port 31 side of the valve seat 4 and below the valve seat 4. The float receiver 6 is configured so that the distance to the valve seat 4 can be changed. For example, the float receiver 6 has a float cover 61 and an adjusting rod 65.

The float cover 61 reduces the fluid that comes into contact with the float 5 among the fluids that flow in from the inflow port 31. The float cover 61 is formed in the shape of a bottomed cylinder or a bowl that opens upward. For example, the float cover 61 has a cylindrical peripheral wall 62 and a bottom 63 provided at one end of the peripheral wall 62. A plurality of communication holes 64 are formed through the bottom 63. The float cover 61 is arranged in the valve chamber 27. The float cover 61 houses the float 5 inside.

FIG. 3 is a cross-sectional view of the exhaust valve 100 in line III-III of FIG. Specifically, four guides 21 extending in parallel with the axis X are formed on the inner peripheral surface of the first casing 11 of the casing 1. The four guides 21 are arranged at equal intervals in the circumferential direction centered on the axis X. The float cover 61 is supported by four guides 21 so as to be movable in the direction of the axis X. That is, the peripheral wall 62 slides with respect to the four guides 21. A gap 33a, which is a part of the fluid flow path 33, is formed between the peripheral wall 62 and the peripheral wall 11a of the float cover 61.

The tip (upper end in FIG. 1) of the adjusting rod 65 is connected to the bottom 63 of the float cover 61. A male screw is formed on the outer circumference of the adjusting rod 65. The first casing 11 of the casing 1 is provided with a support portion 22 for supporting the adjusting rod 65. The support portion 22 is arranged on the axis X at the lower part of the first casing 11. The support portion 22 is connected to the first casing 11 via a plurality of arms (not shown) extending from the inner peripheral surface of the first casing 11. A female screw extending coaxially with the axis X is formed through the support portion 22. The adjustment rod 65 is supported by the support portion 22 by screwing the male screw of the adjustment rod 65 into the female screw of the support portion 22. In this state, the adjusting rod 65 extends coaxially with the axis X, and the float cover 61 is located above the support portion 22. When the adjusting rod 65 is rotated about the axis X, the adjusting rod 65 moves in the direction of the axis X, and the float cover 61 also moves in the direction of the axis X accordingly. In this way, the float receiver 6 changes the distance to the valve seat 4 (specifically, the distance from the bottom 63 to the valve seat 4).

The float 5 is movablely arranged between the valve seat 4 and the float receiver 6 in the casing 1 (specifically, the valve chamber 27). The float 5 is configured to float on a liquid such as water. Specifically, the float 5 is formed in a hollow shape. The float 5 is formed into a substantially sphere. The diameter (outer diameter) of the float 5 is smaller than the inner diameter of the peripheral wall 62. The float 5 allows the outflow of gas from the valve port 41 with the valve port 41 open when the gas flows in from the inflow port 31, while the float 5 floats due to the buoyancy of the liquid when the liquid flows in from the inflow port 31. The valve port 41 is closed to prevent the liquid from flowing out from the valve port 41.

In the initial state, which is a state before the fluid flows into the casing 1, the float 5 is placed in the float cover 61, more specifically on the bottom 63, in the casing 1, as shown in FIG. It is placed. Hereinafter, the position of the float 5 in the initial state is referred to as an "initial position". As described above, when the float receiver 6 changes the distance to the valve seat 4, the initial position of the float 5 is also changed accordingly. That is, the adjusting rod 65 of the float receiver 6 adjusts the initial position of the float 5.

Subsequently, the operation of the exhaust valve 100 will be described. In the following, a case where the gas flowing into the exhaust valve 100 is air and the liquid flowing into the exhaust valve 100 is water will be described as an example.

First, in the state before the fluid flows into the exhaust valve 100, as shown in FIG. 1, the float 5 is located at the initial position placed on the bottom 63 of the float cover 61. At this time, the float 5 is separated from the valve seat 4, and the valve opening 41 is open.

In this state, when air flows into the casing 1 from the inflow port 31, the air flows into the valve port 41 through the flow path 33 of the casing 1. At this time, the air flows to the valve port 41 through the gap 33a between the peripheral wall 11a of the first casing 11 of the casing 1 and the peripheral wall 62 of the float cover 61. A part of the air passes through the communication hole 64 of the float cover 61 and flows into the inside of the float cover 61. Since there is a gap between the peripheral wall 62 of the float cover 61 and the float 5, air flows through the gap to the valve port 41. Air passes through the valve port 41 and flows out of the casing 1 through the outlet 32. Since the float 5 is exposed to the circulating air, it can be shaken by the circulation of the air. However, since most of the air flows through the gap 33a between the peripheral wall 11a and the float cover 61, the swinging motion of the float 5 is reduced.

On the other hand, when water flows into the casing 1 from the inflow port 31, the water passes through the gap 33a between the peripheral wall 11a of the first casing 11 of the casing 1 and the peripheral wall 62 of the float cover 61 and the valve port 41 like air. It flows toward. A part of the water passes through the communication hole 64, passes between the peripheral wall 62 of the float cover 61 and the float 5, and flows toward the valve port 41. At this time, the float 5 floats due to the buoyancy of water. The float 5 rises according to the water level in the casing 1. Eventually, the float 5 sits on the valve seat 4 and closes the valve opening 41, as shown in FIG. The float 5 closes the valve port 41 before the water reaches the valve port 41. As a result, the outflow of water from the exhaust valve 100 is prevented. Since the float 5 is exposed to the circulating water, it can be shaken by the circulation of the water. However, since most of the water flows through the gap 33a between the peripheral wall 11a and the float cover 61, the swinging motion of the float 5 is reduced.

The exhaust valve 100 configured in this way is installed in a water pipe, a pump, or the like (not shown). The exhaust valve 100 discharges the initial air at the beginning of water supply, while the exhaust valve 100 closes when the water supply progresses and water enters the exhaust valve 100 to stop the discharge of air and prevent the discharge of water.

The float 5 rises while floating on the water surface in the casing 1 and sits on the valve seat 4. Therefore, even if the float 5 rises to the position of the valve seat 4, it may be displaced from the valve port 41 and may not immediately fit into the valve port 41. If the initial position of the float 5 is far from the valve seat 4, the range in which the float 5 sways and the possibility of swaying increase, and the possibility that the float 5 does not immediately fit into the valve opening 41 increases. If the valve is closed too late, water may flow out from the exhaust valve 100. On the other hand, if the initial position of the float 5 is close to the valve seat 4, the float 5 may bounce with the force of air or water and close the valve opening 41 when air or water flows around the float 5. There is also. Further, the exhaust valve 100 may vibrate. For example, when the base on which the exhaust valve 100 or the like is installed vibrates, the exhaust valve 100 also vibrates. Further, since the exhaust valve 100 is used together with the pump or the like, vibration of the pump or the drive source of the pump may be transmitted to the exhaust valve 100. In such a case, the float 5 may jump up due to the overall vibration of the exhaust valve 100, and the valve port 41 may be closed. If the valve closes too early, the air cannot be discharged properly.

The initial position of the float 5 is adjusted by the float receiver 6. FIG. 4 is a cross-sectional view of the exhaust valve 100 in a state where the initial position of the float 5 is changed from the position of FIG. By rotating the adjusting rod 65 about the axis X, the distance of the float receiver 6 to the valve seat 4 is changed as shown in FIG. Along with that, the initial position of the float 5 is changed. When the initial position of the float 5 is separated from the valve seat 4, even if the float 5 is flipped up by air or water passing around the float 5, or the float 5 is bounced by the vibration of the exhaust valve 100, the float 5 is moved. The possibility of sitting on the valve seat 4 is reduced. On the other hand, when the initial position of the float 5 approaches the valve seat 4, the swing range and the possibility of swinging of the float 5 become smaller when the float 5 rises according to the water level, and the stability of the float 5 seating on the valve seat 4 becomes smaller. Will increase. From such a viewpoint, the initial position of the float 5 is adjusted according to the usage condition of the exhaust valve 100 (the flow rate of air or water from the inflow port 31, etc.). As a result, the initial position of the float 5 is adjusted to a balanced position in which the valve port 41 is closed by the float 5 not too early and not too late. As a result, a balance (eg, compatibility) can be achieved between the proper discharge of air and the prevention of water discharge.

Subsequently, an application example of the exhaust valve 100 configured in this way will be described. FIG. 5 is a piping diagram of the water supply system 9. The exhaust valve 100 is incorporated in the water supply system 9. Specifically, the water supply system 9 includes a water supply pump 91, a vacuum pump 92, and an exhaust valve 100. The water supply system 9 supplies water from the water storage tank or the like by the water supply pump 91. The vacuum pump 92 and the exhaust valve 100 form a priming mechanism for the water supply pump 91.

Specifically, the intake pipe 93 and the discharge pipe 94 are connected to the water supply pump 91. The water supply pump 91 sucks water through the suction pipe 93 and discharges water through the discharge pipe 94.

The exhaust valve 100 is installed in an exhaust pipe 95 for exhausting air from the water absorption side of the water supply pump 91 and guiding priming water to the water supply pump 91. The exhaust pipe 95 connects the first exhaust pipe 95a that connects the inflow port 31 of the exhaust valve 100 and the suction pipe 93, and the outlet 32 of the exhaust valve 100 and the suction port (not shown) of the vacuum pump 92. 2 Exhaust pipe 95b and the like are included.

The vacuum pump 92 is operated at the start of water supply by the water supply pump 91. The vacuum pump 92 sucks air from the suction pipe 93 and the piping on the upstream side of the suction pipe 93. By suction by the vacuum pump 92, water (so-called priming water) is sucked from the upstream side of the suction pipe 93 toward the water supply pump 91. The priming action of the vacuum pump 92 and the operation of the water supply pump 91 combine to start water supply from the water supply pump 91 at an early stage. At this time, the exhaust valve 100 allows the passage of air while the vacuum pump 92 is sucking air from the suction pipe 93. Eventually, when water is drawn into the suction pipe 93, water enters the exhaust valve 100 via the first exhaust pipe 95a. The exhaust valve 100 is closed by the ingress of water to prevent the passage of water. This prevents water from entering the vacuum pump 92.

At this time, the initial position of the float 5 of the exhaust valve 100 is appropriately adjusted according to the capacities of the water supply pump 91 and the vacuum pump 92. That is, the initial position of the float 5 is adjusted so that the valve is not closed too quickly by the float 5 and the float 5 is closed stably. In particular, in the water supply system 9, the outlet 32 of the exhaust valve 100 is connected to the vacuum pump 92. Therefore, if the initial position of the float 5 is too close to the valve seat 4, the float 5 may float by suction from the outlet 32 instead of the buoyancy of water in the casing 1 and close the valve port 41. Further, the exhaust valve 100 may transmit the vibration of the water supply pump 91, the vacuum pump 92, or their drive source. In such a case, the float 5 may jump up due to vibration and close the valve opening 41. That is, the premature valve closing by the float 5 can occur not only by the air or water flowing into the casing 1 but also by the suction from the outlet 32 and the vibration of the exhaust valve 100. On the other hand, the initial position of the float 5 can be adjusted by the float receiver 6 to a position where the float 5 does not close the valve port 41 even by suction or vibration.

As described above, the exhaust valve 100 is provided between the casing 1 in which the inflow port 31 and the outflow port 32 are formed, and the inflow port 31 and the outflow port 32 in the casing 1, and has a valve port 41. 4 and the float receiver 6 arranged in the casing 1 on the inflow port 31 side of the valve seat 4 and below the valve seat 4, and between the valve seat 4 and the float receiver 6 in the casing 1. The float 5 is provided with a float 5 for opening and closing the valve port 41, and the float 5 is located at an initial position which is a position on the float receiver 6 when no fluid is flowing into the casing 1. When the valve port 41 is open and gas flows into the casing 1 from the inflow port 31, the outflow of gas from the outflow port 32 is allowed with the valve port 41 open, while the gas flows out from the inflow port 31 into the casing 1. When the liquid flows into the casing, it floats by the buoyancy of the liquid and closes the valve port 41 to prevent the liquid from flowing out from the outlet 32, and the float receiver 6 changes the distance to the valve seat 4 to change the initial position. It is configured to be adjustable.

According to this configuration, when no fluid is flowing into the casing 1, the float 5 is located at the initial position on the float receiver 6 and the valve port 41 is open. When gas flows into the casing 1 from this state, the float 5 keeps the valve port 41 open and allows the gas to flow out from the outflow port 32. That is, the gas passes through the exhaust valve 100. On the other hand, when the liquid flows into the casing 1, the float 5 floats due to the buoyancy of the liquid and closes the valve port 41 to prevent the liquid from flowing out from the outflow port 32. That is, the liquid does not pass through the exhaust valve 100. In the exhaust valve 100 that operates in this way, the float receiver 6 changes the distance to the valve seat 4 to adjust the initial position of the float 5. As a result, the float 5 is flipped up by the fluid flowing around the float 5, and the valve opening 41 is unintentionally closed, or the float 5 shakes greatly while ascending from the initial position to the valve seat 4, and the valve opening It is possible to prevent the 41 from being unable to be closed stably. As a result, a balance can be achieved between the proper discharge of air and the prevention of water discharge.

Further, the float receiver 6 is arranged in the casing 1 and has a float cover 61 for reducing the fluid that comes into contact with the float 5 among the fluids flowing in from the inflow port 31, and the float cover 61 extends to the valve seat 4. It is configured so that the distance of can be changed.

Specifically, the adjustment rod 65 is connected to the float cover 61. By operating the adjusting rod 65, the float cover 61 moves, and the distance between the float cover 61 and the valve seat 4 is changed.

According to this configuration, even if the float cover 61 moves, the float 5 at the initial position is maintained in a state of being positioned on the float cover 61. That is, even if the distance between the float receiver 6 and the valve seat 4, that is, the distance between the float cover 61 and the valve seat 4 is changed, the fluid that comes into contact with the float 5 among the fluids flowing in from the inflow port 31 is the float cover 61. Is maintained in a reduced state.

Further, the outlet 32 is connected to the vacuum pump 92.

According to this configuration, a negative pressure acts on the outlet 32 by the suction of the vacuum pump 92, and the fluid in the casing 1 is sucked through the outlet 32. Therefore, when the initial position of the float 5 is close to the valve seat 4, even if the liquid enough to close the float 5 does not flow into the casing 1, that is, the gas still flows out from the outflow port 32. Even at the proper timing, the float 5 may be sucked and the valve port 41 may be closed. By adjusting the distance between the float receiver 6 and the valve seat 4, it is possible to prevent the float 5 from accidentally closing the valve opening 41 due to suction toward the outlet 32.

Further, the exhaust valve 100 is installed in an exhaust pipe 95 for exhausting air from the water absorption side of the water supply pump 91 and guiding priming water to the water supply pump 91.

According to this configuration, the exhaust valve 100 is used as a part of the priming mechanism of the water supply pump 91. Since the exhaust valve 100 suppresses unexpected closing of the valve, a relatively large amount of air can be exhausted from the water absorption side of the water supply pump 91. That is, the exhaust valve 100 can contribute to high priming performance. In addition, since the exhaust valve 100 is stably closed when a predetermined amount of water flows into the casing 1, the outflow of water to the downstream side of the exhaust valve 100 (for example, the inflow of water into the vacuum pump 92). ) Can be prevented.

<< Embodiment 2 >>
Subsequently, the exhaust valve 200 according to the second embodiment will be described with reference to FIG. FIG. 6 is a cross-sectional view of the exhaust valve 200.

The structure of the float receiver 206 of the exhaust valve 200 is different from that of the float receiver 6 of the exhaust valve 100. Hereinafter, among the exhaust valves 200, the same configurations as those of the exhaust valve 100 will be described with the same reference numerals, and the description thereof will be omitted, and the configurations different from those of the exhaust valve 100 will be mainly described.

The exhaust valve 200 includes a casing 1, a valve seat 4, a float 5, and a float receiver 206. The float receiver 206 has substantially the same configuration as the adjusting rod 65. The exhaust valve 200 may further include a float cover 261. The float cover 261 has substantially the same configuration as the float cover 61. The float cover 61 moved integrally with the adjusting rod 65, whereas the float cover 261 did not move integrally with the float receiver 206 and was fixed to the casing 1.

Specifically, the float cover 261 has a cylindrical peripheral wall 262 and a bottom 263 provided at one end of the peripheral wall 262, and is formed in a bottomed tubular shape that opens upward. A plurality of communication holes 264 are formed through the bottom 263. The float cover 261 is fixedly supported by four guides 21.

The float receiver 206 is formed in a rod shape. A male screw is formed on the outer circumference of the float receiver 206. The float receiver 206 is supported by the support portion 22 by screwing the male screw of the float receiver 206 into the female screw of the support portion 22. In this state, the float receiver 206 extends coaxially with the axis X. At this time, the tip end portion (upper end portion in FIG. 6) of the float receiver 206 penetrates the bottom 263 of the float cover 261. A contact portion 265 that comes into contact with the float 5 at the initial position is provided at the tip of the float receiver 206. The contact portion 265 is formed in a spherical crown shape recessed downward. The float 5 in the initial position is placed on the contact portion 265.

When the float receiver 206 is rotated about the axis X, the float receiver 206 moves in the direction of the axis X, and the distance from the contact portion 265 to the valve seat 4 is changed accordingly (FIG. 6). See the two-dot chain line). At this time, the float cover 261 does not move. In this way, the float receiver 206 moves independently of the float cover 261 to change the distance to the valve seat 4.

The operation of the exhaust valve 200 is the same as the operation of the exhaust valve 100. When air flows into the casing 1 from the inflow port 31, the air flows to the valve port 41 through the gap 33a between the peripheral wall 11a of the first casing 11 and the peripheral wall 262 of the float cover 261. A part of the air passes through the communication hole 264 of the float cover 261, flows into the inside of the float cover 261, passes between the peripheral wall 262 of the float cover 261 and the float 5, and flows to the valve port 41. Air passes through the valve port 41 and flows out of the casing 1 through the outlet 32.

On the other hand, when water flows into the casing 1 from the inflow port 31, the water passes through the gap 33a between the peripheral wall 11a of the first casing 11 and the peripheral wall 262 of the float cover 261 to the valve port 41 in the same manner as the air. It flows toward. A part of the water passes through the communication hole 264, passes between the peripheral wall 262 of the float cover 261 and the float 5, and flows toward the valve port 41. At this time, the float 5 floats due to the buoyancy of water. The float 5 rises according to the water level in the casing 1, and eventually sits on the valve seat 4 and closes the valve opening 41. The float 5 closes the valve port 41 before the water reaches the valve port 41. As a result, the outflow of water from the exhaust valve 200 is prevented.

At this time, the initial position of the float 5 is adjusted by the float receiver 206. Specifically, the float 5 does not unexpectedly close the valve opening 41 due to the flow of air or water or the vibration of the exhaust valve 200, and the float 5 is initially set at a position where it is stably seated on the valve seat 4 when water flows in. The position is adjusted.

As described above, the exhaust valve 200 is provided between the casing 1 in which the inflow port 31 and the outflow port 32 are formed, and the inflow port 31 and the outflow port 32 in the casing 1, and has a valve port 41. 4 and the float receiver 206 located on the inflow port 31 side of the valve seat 4 and below the valve seat 4 in the casing 1 and between the valve seat 4 and the float receiver 206 in the casing 1. The float 5 is provided with a float 5 for opening and closing the valve port 41, and the float 5 is located at an initial position which is a position on the float receiver 206 when no fluid is flowing into the casing 1. When the valve port 41 is open and gas flows into the casing 1 from the inflow port 31, the outflow of gas from the outflow port 32 is allowed with the valve port 41 open, while the gas flows out from the inflow port 31 into the casing 1. When the liquid flows into the casing, it floats by the buoyancy of the liquid and closes the valve port 41 to prevent the liquid from flowing out from the outlet 32, and the float receiver 206 changes the distance to the valve seat 4 to change the initial position. It is configured to be adjustable.

According to this configuration, when no fluid is flowing into the casing 1, the float 5 is located at the initial position on the float receiver 206, and the valve port 41 is open. When gas flows into the casing 1 from this state, the float 5 keeps the valve port 41 open and allows the gas to flow out from the outflow port 32. That is, the gas passes through the exhaust valve 200. On the other hand, when the liquid flows into the casing 1, the float 5 floats due to the buoyancy of the liquid and closes the valve port 41 to prevent the liquid from flowing out from the outflow port 32. That is, the liquid does not pass through the exhaust valve 200. In the exhaust valve 200 that operates in this way, the float receiver 206 changes the distance to the valve seat 4 to adjust the initial position of the float 5. As a result, the float 5 is flipped up by the fluid flowing around the float 5, and the valve opening 41 is unintentionally closed, or the float 5 shakes greatly while ascending from the initial position to the valve seat 4, and the valve opening It is possible to prevent the 41 from being unable to be closed stably. As a result, a balance can be achieved between the proper discharge of air and the prevention of water discharge.

Further, the exhaust valve 200 is arranged in the casing 1 and further includes a float cover 261 for reducing the fluid that comes into contact with the float 5 among the fluids flowing in from the inflow port 31, and the float receiver 206 is provided from the float cover 261. It moves independently and the distance to the valve seat 4 can be changed.

According to this configuration, the float cover 261 does not need to move together with the float receiver 206 when changing the distance of the float receiver 206 to the valve seat 4. That is, the configuration of the float cover 261 can be simplified in that the float cover 261 does not need to be configured to be movable.

<< Embodiment 3 >>
Subsequently, the exhaust valve 300 according to the third embodiment will be described with reference to FIG. 7. FIG. 7 is a cross-sectional view of the exhaust valve 300.

The exhaust valve 300 is different from the exhaust valve 100 in that it further includes a check valve. Hereinafter, among the exhaust valves 300, the same configurations as those of the exhaust valve 100 will be described with the same reference numerals, and the description thereof will be omitted, and the configurations different from those of the exhaust valve 100 will be mainly described.

The exhaust valve 300 includes a casing 301, a valve seat 4, a float 5, a float receiver 6, and a check valve 307.

The casing 301 is formed with an inflow port 31, an outflow port 332, and a valve chamber 27. The casing 301 is formed with a flow path 333 through which the fluid flowing in from the inflow port 31 flows toward the outflow port 332. Casing 301 has a first casing 11, a second casing 312, and a third casing 313. The first casing 11 has the same configuration as the first casing 11 of the exhaust valve 100.

The second casing 312 has substantially the same configuration as the second casing 12 of the exhaust valve 100. The second casing 212 is formed in a bottomed cylindrical shape extending in the direction of the axis X. The second casing 212 has an opening 16 that opens in the direction of the axis X. The bottom of the second casing 212 forms the ceiling 17. The second casing 312 is provided with a first bearing 375 in the opening 16. The first bearing 375 is formed in an annular shape centered on the axis X. The first bearing 375 is connected to a base ring 377 formed concentrically with the first bearing 375 by an arm (not shown) extending in the radial direction about the axis X. The first bearing 375, the arm, and the base ring 377 are formed in a flat plate shape as a whole. At the end of the opening 16 of the second casing 312, a step on which the base ring 377 is placed and a groove extending in the circumferential direction around the axis X are formed at a position closer to the opening end than the step. There is. A C-shaped retaining ring 378 is fitted in the groove in a state where the base ring 377 is placed on the step. As a result, the first bearing 375 is arranged in the opening 16.

The third casing 313 has a first opening 323 that opens downward along the direction of the axis X, and a second opening that is located above the first opening 323 and opens in the radial direction centered on the axis X. An opening 324 and a communication hole 325 that communicates the first opening 323 and the second opening 324 are formed. A female screw is formed at the opening end of the first opening 323. With the second casing 312 mounted on the end of the first casing 11 on the second opening 15 side, the third casing 313 is screwed to the end of the first casing 11 on the second opening 15 side. As a result, the second casing 312 and the third casing 313 are attached to the first casing 11.

A valve chamber 27 for the float 5 is formed in the casing 301, which is partitioned by the peripheral wall 11a and the ceiling 17. Further, in the casing 301, a valve chamber 379 for the check valve 307 is formed by the opening 16 of the second casing 312 and the first opening 323 of the third casing 313. A flow path 333 is formed inside the first casing 11, the second casing 312, and the third casing 313. A part of the flow path 333 is formed by a gap 33a between the peripheral wall 11a and the float cover 61. The second opening 324 is the outlet 332. The outflow port 332 is arranged above the inflow port 31.

A second bearing 376 is formed in the third casing 313. The second bearing 376 is provided in the communication hole 325. The second bearing 376 is connected to a plurality of arms (not shown) extending from the inner peripheral surface of the communication hole 325. The second bearing 376 has an opening extending in the direction of the axis X.

The check valve 307 has a valve body 371 and a valve seat 372.

The valve body 371 is formed in a disk shape. The valve body 371 has an outer diameter larger than the inner diameter of the opening end of the opening 16. The valve body 371 has a first shaft 373 and a second shaft 374. The first shaft 373 and the second shaft 374 extend from both sides of the valve body 371 in the axial direction of the valve body 371. That is, the first shaft 373 and the second shaft 374 are arranged in a straight line. The first shaft 273 and the second shaft 274 are arranged at the center of the valve body 271.

The valve seat 372 is formed at the open end of the opening 16 of the second casing 312.

The valve body 371 is housed in the valve chamber 379. The first shaft 373 is inserted into the first bearing 375. The second shaft 374 is inserted into the second bearing 376. The first shaft 373 and the second shaft 374 are slidable in the direction of the axis X with respect to the first bearing 375 and the second bearing 376, respectively. When no fluid has flowed into the casing 301, the valve body 371 is seated on the valve seat 372 due to its own weight (see the solid line in FIG. 7). The valve body 371 closes the opening 16 by sitting on the valve seat 372.

Subsequently, the operation of the exhaust valve 300 configured in this way will be described. The operation of the float 5 in the exhaust valve 300 is the same as the operation of the float 5 in the exhaust valve 100.

First, in the state before the fluid flows into the exhaust valve 300, the float 5 is located at the initial position mounted on the bottom 63 of the float cover 61, and the valve port 41 is opened. Further, the valve body 371 is seated on the valve seat 372 and closes the opening 16.

In this state, when air flows into the casing 301 from the inflow port 31, the air flows into the valve port 41 through the flow path 333 of the casing 301. The air that has passed through the valve port 41 pushes up the valve body 371 to open the valve. Air passes from the opening 16 through the first opening 323 and the communication hole 325 of the third casing 313 in order, and flows out from the casing 301 through the outlet 332.

On the other hand, when water flows into the casing 301 from the inflow port 31, the water flows toward the valve port 41 in the same manner as the air. At this time, the float 5 floats due to the buoyancy of water. Eventually, the float 5 sits on the valve seat 4 and closes the valve opening 41. The float 5 closes the valve port 41 before the water reaches the valve port 41. This prevents the outflow of water from the exhaust valve 300.

At this time, the initial position of the float 5 is adjusted by the float receiver 6. Specifically, the float 5 does not suddenly close the valve opening 41 due to the flow of air or water or the vibration of the exhaust valve 300, and the float 5 is initially set at a position where it is stably seated on the valve seat 4 when water flows in. The position is adjusted.

The exhaust valve 300 configured in this way is installed in a water pipe, a pump, or the like (not shown). The exhaust valve 300 discharges the initial gas at the beginning of water supply, while the exhaust valve 300 closes when the water supply progresses and water enters the exhaust valve 300 to stop the gas discharge and also prevent the water discharge.

Here, since the exhaust valve 300 has a check valve 307, even if a fluid flows into the casing 301 from the outflow port 332, the check valve 307 closes to prevent the backflow of the fluid. For example, when the exhaust valve 300 is incorporated in the water supply system 9 as shown in FIG. 5, the operation of the vacuum pump 92 is stopped after the priming water is drawn into the water supply pump 91. As a result, the suction force does not act on the outlet 332 of the exhaust valve 300. On the other hand, since the water supply pump 91 sucks water through the suction pipe 93, the suction force of the water supply pump 91 may act on the inflow port 31 of the exhaust valve 300. In such a case, even if air flows into the casing 301 from the outflow port 332, the check valve 307 closes the opening 16 to prevent the air from flowing back through the exhaust valve 300. As a result, air is prevented from flowing into the suction pipe 93 through the exhaust pipe 95, and water supply by the water supply pump 91 is appropriately continued.

As described above, the exhaust valve 300 is provided between the casing 301 in which the inflow port 31 and the outflow port 332 are formed, and the inflow port 31 and the outflow port 332 in the casing 301, and has a valve port 41. 4 and the float receiver 6 located on the inflow port 31 side of the valve seat 4 and below the valve seat 4 in the casing 301, and between the valve seat 4 and the float receiver 6 in the casing 301. The float 5 is provided with a float 5 for opening and closing the valve port 41, and the float 5 is located at an initial position which is a position on the float receiver 6 when no fluid is flowing into the casing 301. When the valve port 41 is open and gas flows into the casing 301 from the inflow port 31, the outflow of gas from the outflow port 332 is allowed with the valve port 41 open, while the gas flows out from the inflow port 31 into the casing 301. When the liquid flows into the casing, it floats by the buoyancy of the liquid and closes the valve port 41 to prevent the liquid from flowing out from the outlet 332, and the float receiver 6 changes the distance to the valve seat 4 to change the initial position. It is configured to be adjustable.

According to this configuration, when no fluid is flowing into the casing 301, the float 5 is located at the initial position on the float receiver 6 and the valve port 41 is open. When gas flows into the casing 301 from this state, the float 5 keeps the valve port 41 open and allows the gas to flow out from the outflow port 332. That is, the gas passes through the exhaust valve 300. On the other hand, when the liquid flows into the casing 301, the float 5 floats due to the buoyancy of the liquid and closes the valve port 41 to prevent the liquid from flowing out from the outflow port 332. That is, the liquid does not pass through the exhaust valve 300. In the exhaust valve 300 operating in this way, the float receiver 6 changes the distance to the valve seat 4 to adjust the initial position of the float 5. As a result, the float 5 is flipped up by the fluid flowing around the float 5, and the valve opening 41 is unintentionally closed, or the float 5 shakes greatly while ascending from the initial position to the valve seat 4, and the valve opening It is possible to prevent the 41 from being unable to be closed stably. As a result, a balance can be achieved between the proper discharge of air and the prevention of water discharge.

Further, the exhaust valve 300 is arranged between the valve seat 4 and the outflow port 332 in the casing 301, and further includes a check valve 307 that prevents the fluid flowing in from the outflow port 332 from flowing toward the inflow port 31. Be prepared.

According to this configuration, the fluid is prevented from flowing back through the exhaust valve 300. As described above, when the exhaust valve 300 is used to guide the priming water to the water supply pump 91, the operation of the vacuum pump 92 is stopped after the introduction of the priming water to the water supply pump 91 is completed. That is, the suction from the inflow port 31 of the exhaust valve 300 toward the outflow port 332 is stopped. In that case, the suction of the water supply pump 91 may cause a flow from the outflow port 332 to the inflow port 31, that is, a flow flowing back through the exhaust valve 300. On the other hand, since the exhaust valve 300 is provided with the check valve 307, the backflow of the fluid is prevented. As a result, proper water supply of the water supply pump 91 is maintained.

<< Other Embodiments >>
As described above, the above-described embodiment has been described as an example of the technology disclosed in the present application. However, the technique in the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. are made as appropriate. It is also possible to combine the components described in the above embodiment to form a new embodiment. In addition, among the components described in the attached drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to exemplify the above-mentioned technology. Can also be included. Therefore, the fact that those non-essential components are described in the accompanying drawings or detailed description should not immediately determine that those non-essential components are essential.

For example, the configurations of the casings 1 and 301 are merely examples, and any configuration may be adopted.

The float receiver 6 does not have to have the float cover 61. That is, the float receiver may adopt any configuration as long as it can support the float 5 at the initial position. The float cover 261 may also be omitted in the exhaust valve 200.

The exhaust valves 100 to 300 are not limited to those used for priming the water supply pump 91. Exhaust valves 100-300 can be applied to parts that are required to allow the passage of gas and block the passage of liquid.

As described above, the techniques disclosed herein are useful for exhaust valves.

100,200,300 Exhaust valve 1,301 Casing 31 Inlet 32,332 Outlet 4 Valve seat 41 Valve port 5 Float 6,206 Float receiver 61,261 Float cover 65 Adjusting rod 307 Check valve 91 Water supply pump 92 Vacuum pump 95 Exhaust pipe

Claims (6)

With the casing in which the inflow port and the outflow port are formed,
A valve seat provided between the inlet and the outlet in the casing and having a valve port,
In the casing, a float receiver arranged on the inflow side of the valve seat and below the valve seat.
It is provided with a float that is movablely arranged between the valve seat and the float receiver in the casing and opens and closes the valve opening.
The float
When no fluid has flowed into the casing, the valve port is opened at the initial position, which is the position on the float receiver.
When gas flows into the casing from the inflow port, the outflow of gas from the outflow port is allowed with the valve port open, while the outflow of gas is allowed.
When the liquid flows into the casing from the inflow port, it floats by the buoyancy of the liquid and closes the valve port to prevent the liquid from flowing out from the outflow port.
The float receiver is an exhaust valve configured so that the initial position can be adjusted by changing the distance to the valve seat. In the exhaust valve according to claim 1,
The float receiver is arranged in the casing and has a float cover for reducing the fluid that comes into contact with the float among the fluids flowing in from the inflow port.
The float cover is an exhaust valve configured so that the distance to the valve seat can be changed. In the exhaust valve according to claim 1,
Further provided with a float cover arranged in the casing to reduce the fluid flowing in from the inlet that comes into contact with the float.
The float receiver is an exhaust valve that moves independently of the float cover and is configured so that the distance to the valve seat can be changed. In the exhaust valve according to any one of claims 1 to 3.
An exhaust valve further provided with a check valve arranged between the valve seat and the outlet in the casing to prevent a fluid flowing in from the outlet from flowing toward the inlet. In the exhaust valve according to any one of claims 1 to 4.
The outlet is an exhaust valve connected to a vacuum pump. The exhaust valve according to claim 5.
An exhaust valve installed in an exhaust pipe for exhausting air from the water absorption side of a water supply pump and guiding priming water to the water supply pump.

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