JP2013064445A - Exhaust valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust valve which prevents a water leak and elastic member damage even is water suddenly flows from an inflow port into a valve chamber.SOLUTION: The exhaust valve is configured as follows: the valve chamber 3 is formed with the inflow port 4 opened at its lower portion and an outflow port 5 opened at its upper portion; a valve seat 6 is formed between the valve chamber 3 and the outflow port 5; a float support 10 is formed in a bottomed substantially-cylindrical shape within the valve chamber 3 with a flow passage between an inner wall of a valve chamber 3 and itself and has a through-hole 11 and a second through-hole 8 both of which reside on a bottom wall to bring its inside into fluid communication with its outside; a spherical float 12 is arranged in the float support 10 in a free state; a sidewall 10a is fixed in the valve chamber 3 by separately forming the sidewall 10a and a bottom wall 10b in the float support 10 and the bottom wall 10b is urged to the inflow port 4 side for arrangement by a coil spring 13; an opening/closing member 17 is provided which closes the second through-hole 8 when the bottom wall 10b of the float support 10 displaces to the inflow port 4 side; and the bottom wall 10b of the float support 10 displaces to the outflow port 5 side resisting the coil spring 13 by a force of water suddenly flowing from the inflow port 4 into the valve chamber 3 and simultaneously opens the second through-hole 8.

Description

The present invention opens the valve when water is fed into the pipe, exhausts the air in the pipe, closes when the exhaust is finished, and opens when the pressure in the piping system drops to a vacuum state. The present invention relates to an exhaust valve that breaks a vacuum state by introducing external air.

A conventional exhaust valve is disclosed in Patent Document 1, for example. This is a casing that forms a valve chamber with an inlet opening at the bottom and an outlet opening at the top, forming a valve seat between the valve chamber and the outlet, and flowing between the valve chamber and the valve chamber wall. A float receiver that has a bottomed, almost cylindrical shape with a passage and a through hole that communicates the inside and outside of the bottom, and the float is placed in a free state in the float receiver. The inside and outside communicate with the bottom wall of the float receiver. The float receiver is urged toward the inlet by an elastic member, and an opening / closing member is provided to close the second through hole when the float receiver is displaced toward the inlet. The float receiver is displaced to the outlet side against the elastic member by the momentum of the water that suddenly flows into the valve chamber and opens the second through hole. In this exhaust valve, when water is first fed into the pipe, the float receiver is urged toward the inlet by the urging force of the elastic member, the second through hole is closed by the opening / closing member, and the float is lowered from the valve seat. The valve is open on the bottom wall of the float receiver. Thus, the air in the pipe flowing into the valve chamber is exhausted from the flow path between the valve chamber wall and the float receiver through the float receiver upper end and from the through hole to the outlet through the float receiver. When the exhaust is finished and the water in the pipe gently flows into the valve chamber from the inlet, the float receiver is biased toward the inlet by the biasing force of the elastic member and is locked by the opening / closing member. Is kept closed. The float floats by water flowing into the float receiver from the flow path between the valve chamber wall and the float receiver through the upper end of the float receiver and through the through hole, and sits on the valve seat to close the valve. This prevents leakage of water. In addition, when water in the pipe suddenly flows into the valve chamber from the inlet, the float receiver is displaced to the outlet side against the elastic member by the force of the water, and the float is displaced to the outlet side. The second through hole is opened, and the float is quickly floated by water flowing into the float receiver from the flow path between the valve chamber wall and the float receiver through the upper end of the float receiver and through the through hole and the second through hole. Because it sits on and closes, water leakage does not occur. When the pressure in the piping system is reduced to a vacuum state, the float is separated from the valve seat and descends, and the valve is opened on the bottom wall of the float receiver. As a result, the external air flowing into the valve chamber is introduced into the piping from the inlet through the flow path between the upper end of the float receiver and the flow chamber between the valve inner wall and the float receiver and through the through hole from the inlet to the pipe. Destroy.

JP 2010-249231 A

In the conventional exhaust valve, since the entire float receiver is displaced against the elastic member by the momentum of water that suddenly flows into the valve chamber from the inlet, the elastic member is displaced by the weight of the float receiver. There was a problem that it was easily damaged.

Accordingly, the problem to be solved by the present invention is to provide an exhaust valve that does not cause water leakage and prevents damage to an elastic member even when water suddenly flows into the valve chamber from the inlet.

In order to solve the above-described problems, the exhaust valve of the present invention forms a valve chamber having an inlet opening at the bottom and an outlet opening at the upper portion of the casing, and a valve seat is formed between the valve chamber and the outlet. In addition, a float receiver having a substantially cylindrical shape with a bottom provided with a flow path between the valve chamber wall and the inside and outside of the valve chamber is arranged in the valve chamber, and the float is arranged in the float receiver in a free state. In the case where the second through-hole communicating with the inside and the outside is provided in the bottom wall of the float receiver, the side wall and the bottom wall of the float receiver are formed separately to fix the side wall in the valve chamber, and the bottom wall is made of an elastic member. An opening / closing member is provided that is biased toward the inlet and closes the second through-hole when the bottom wall of the float receiver is displaced toward the inlet, and the momentum of water that suddenly flows into the valve chamber from the inlet The bottom wall of the float receiver is displaced to the outlet side against the elastic member and opens the second through hole. It is characterized in.

According to the present invention, the side wall and the bottom wall of the float receiver are formed separately, the side wall is fixed in the valve chamber, and the bottom wall is urged to the inlet side by the elastic member. An opening / closing member is provided to close the second through hole when the valve is displaced to the inlet side, and the bottom wall of the float receiver resists the elastic member by the force of water that suddenly flows into the valve chamber from the inlet. And the second through-hole is opened, so that even if water suddenly flows into the valve chamber from the inlet, the float moves along with the displacement of the bottom wall of the float receiver toward the outlet. It can be displaced to the side and quickly floated by the water flowing into the float receiver through the through-hole and the second through-hole, can be seated on the valve seat and closed, and there is an effect that water leakage does not occur and damage to the elastic member can be prevented. .

It is sectional drawing of the exhaust valve concerning embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. A lid 2 is fastened to the main body 1 with a bolt to form a casing having a valve chamber 3 therein. An inlet 4 is formed in the lower part of the main body 1, and an outlet 5 is formed in the upper part of the lid 2. The attachment member 7 is fixed with screws with the valve seat 6 interposed between the lid 2 and the valve seat 6. The main body 1 integrally has a plurality of ribs 9 protruding inwardly on the inner wall of the valve chamber 3, and a bottomed substantially cylindrical float receiver 10 is disposed inside the ribs 9. The float receiver 10 has a side wall 10a and a bottom wall 10b formed separately. The side wall 10a is mounted on the step portion of the rib 9 and fixed in the valve chamber 3 with a snap ring 15, and the bottom wall 10b is connected to the snap ring 16. The coil spring 13 serving as an elastic member disposed therebetween is urged toward the inlet 4 and placed on the opening / closing member 17. The bottom wall 10 b of the float receiver 10 has a through hole 11 and a second through hole 8 that communicate the inside and outside of the float receiver 10 in the vertical direction. A flow path between the inner wall of the valve chamber 3 and the float receiver 10 is formed between the ribs 9. A spherical float 12 is placed in a free state in the float receiver 10.

The main body 1 integrally has an attachment member 19 via a plurality of ribs 18 projecting inwardly on the inner wall of the inlet 4. The opening / closing member 17 is screwed to the mounting member 19, and is loosened with a lock nut 20. In the opening / closing member 17, the upper disc portion 17 a opens and closes the second through-hole 8 in the bottom wall 10 b of the float receiver 10. The bottom wall 10 b of the float receiver 10 is urged toward the inlet 4 by the biasing force of the coil spring 13 when air flows into the valve chamber 3 from the inlet 4 or when water slowly flows into the valve chamber 3. Although the second through hole 8 is closed by being locked by the plate portion 17a, when water flows in rapidly, it is displaced toward the outlet 5 side against the coil spring 13 by the force of the water, and the float 12 is moved to the valve seat 6 And the second through hole 8 is opened.

The operation of the exhaust valve of the above embodiment is as follows. First, when water is fed into the pipe, the bottom wall 10 b of the float receiver 10 is urged toward the inlet 4 by the urging force of the coil spring 13 and rests on the opening / closing member 17 so that the second through hole 8 is closed by the opening / closing member 17. The float 12 is in a valve-opened state in which the float 12 is separated from the valve seat 6 and descends and is placed on the bottom wall 10 b of the float receiver 10. Thereby, the air in the pipe flowing into the valve chamber 3 is exhausted from the flow path between the ribs 9 through the upper end of the float receiver 10 and through the through hole 11 into the outlet 5 to the outlet 5.

Then, when the exhaust is finished and the water in the pipe gently flows into the valve chamber 3 from the inlet 4, the bottom wall 10 b of the float receiver 10 is urged toward the inlet 4 by the urging force of the coil spring 13 to open and close. The second through hole 8 is placed on the member 17 and is kept closed by the opening / closing member 17. The float 12 floats by water flowing into the float receiver 10 from the flow path between the ribs 9 through the upper end of the float receiver 10 and through the through hole 11, and is seated on the valve seat 6 and closed. This prevents leakage of water. When water in the pipe suddenly flows into the valve chamber 3 from the inlet 4, the bottom wall 10 b of the float receiver 10 is displaced toward the outlet 5 against the coil spring 13 by the force of water. The float 12 is displaced to the outlet 5 side, and the second through hole 8 is opened. The float 12 passes from the flow path between the ribs 9 through the upper end of the float receiver 10 and through the through hole 11 and the second through hole 8. Since the water that has flowed into the air quickly rises and sits on the valve seat 6 and closes, water leakage does not occur. When the pressure in the piping system is reduced to a vacuum state, the float 12 is separated from the valve seat 6 and descends, and the valve 12 is placed on the bottom wall of the float receiver 10. Thereby, the external air flowing into the valve chamber 3 is introduced into the pipe from the inlet 4 through the flow path between the upper end of the float receiver 10 and the rib 9 and through the through hole 11 from the float receiver 10 into the pipe. Destroy the state.

The present invention opens the valve when water is fed into the pipe, exhausts the air in the pipe, closes when the exhaust is finished, and opens when the pressure in the piping system drops to a vacuum state. Thus, it can be used as an exhaust valve for breaking the vacuum state by introducing external air.

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Valve chamber 4 Inlet 5 Outlet 6 Valve seat 8 Second through-hole 9 Rib 10 Float receptacle 10a Side wall 10b Bottom wall 11 Through-hole 12 Float 13 Coil spring 17 Opening and closing member

Claims (1)

A valve chamber with an inlet opening at the bottom and an outlet opening at the top is formed in the casing, a valve seat is formed between the valve chamber and the outlet, and a flow path is provided between the valve chamber and the valve chamber wall. A float receiver having a bottomed, generally cylindrical shape with a through hole communicating with the inside and outside of the bottom, a float arranged in the float receiver in a free state, and a second through hole communicating with the bottom wall of the float receiver inside and outside The float receiving side wall and the bottom wall are formed separately, the side wall is fixed in the valve chamber, and the bottom wall is urged to the inlet side by an elastic member. An opening / closing member is provided to close the second through hole when the valve is displaced to the inlet side, and the bottom wall of the float receiver resists the elastic member by the force of water that suddenly flows into the valve chamber from the inlet. An exhaust valve characterized in that the second through hole is opened while being displaced.

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