JP5517853B2 - Exhaust valve - Google Patents

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 having a substantially cylindrical shape with a bottom provided with a passage and having a through-hole communicating with the inside and outside of the bottom wall is arranged, and the float is arranged in a free state in the float receiver. This exhaust valve is in an open state in which when the water is first fed into the piping, the float is separated from the valve seat and descends, and the air in the piping flowing into the valve chamber from the inflow port is supplied to the float receiver and the valve chamber wall. The air is exhausted from the flow path between the two through the upper end of the float receiver and through the inside of the float receiver through the through hole. When the exhaust is finished and water in the pipe flows into the valve chamber from the inlet, it flows from the flow path between the float receiver and the valve chamber wall through the upper end of the float receiver and from the through hole into the float receiver. The float rises due to water, sits on the valve seat and closes. In addition, when the pressure in the piping system drops to a vacuum state, the float moves away from the valve seat and descends, and external air flowing into the valve chamber from the outlet is passed through the through hole and float. The vacuum state is broken by introducing into the pipe through the flow path between the float receiver and the valve chamber wall from the upper end of the receiver.

Japanese Utility Model Publication No. 53-1622

In the conventional exhaust valve, the float does not drop sufficiently when breaking the vacuum state, and the vacuum breaking ability is small and the vacuum breaking takes time because the float is not fully opened or the opening / closing valve is repeated little by little. There was a problem. This is because most of the external air that flows into the valve chamber from the outlet goes straight into the float receiver, and the outside air that has entered the float receiver cannot pass through the through hole. This is because the float pressure rises and the float rises.

Therefore, the problem to be solved by the present invention is to provide an exhaust valve that has a large vacuum breaking capability and can be quickly broken.

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 of the valve chamber and having a through hole communicating with the inside and outside of the bottom wall is arranged, and the float is freely placed in the float receiver. In the arrangement, 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 upward by an elastic member, and the inside and outside of the bottom wall of the float receiver are A second communicating hole is formed, and when the bottom wall is displaced upward, the float lower part in the float receiver communicates with the inflow port through the through hole and the momentum of the external air flowing into the valve chamber from the outflow port When the bottom wall is displaced downward against the elastic member, It is characterized in that the bets downward communicates with the inlet via a through hole and a second hole.

According to the present invention, the side wall and the bottom wall of the float receiver are formed separately, and the side wall is fixed in the valve chamber, and the bottom wall is urged upward by the elastic member, and is disposed inside and outside the side wall of the float receiver. The second through hole is formed to communicate with the inlet, and when the bottom wall is displaced upward, the lower part of the float in the float receiver communicates with the inlet through the through hole and the momentum of the external air flowing into the valve chamber from the outlet When the bottom wall is displaced downward against the elastic member, the lower part of the float in the float receiver communicates with the inlet through the through hole and the second through hole, so that the external air that has entered the float receiver is It is possible to quickly flow down from the through hole and the second through hole to the inlet, and it is possible to prevent the pressure below the float in the float receiver from rising. Therefore, the vacuum breaking ability is large and an excellent effect that the vacuum breaking can be performed quickly is achieved.

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 locked to a step portion of the rib 9 by a snap ring 15 and fixed in the valve chamber, and the bottom wall 10b is a coil spring as an elastic member. 13 and urge upward. The bottom wall 10b of the float receiver 10 has a through hole 11a that communicates the inside and outside of the float receiver 10 in the vertical direction, and the lower part of the side wall 10a of the float receiver 10 is a second through hole 11b that communicates the inside and outside of the float receiver 10 in the lateral direction. For example, four. 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.

When air or water flows into the valve chamber 3 from the inlet 4 into the valve chamber 3, the bottom wall 10 b is displaced upward by the elastic force of the coil spring 13 so that the bottom of the float 12 in the float receiver 10 and the inlet 4 pass through the through holes 11 a. When the vacuum breaks, the external air flowing into the valve chamber 3 from the outlet port 5 is displaced downward against the coil spring 13 and the float 8 below the inlet 10 and the inlet port 4 are connected to each other. It communicates through the through hole 11a and the second through hole 11b.

The operation of the exhaust valve will be described. First, when water is fed into the pipe, the bottom wall 10b is displaced upward by the elastic force of the coil spring 13 to communicate with the lower part of the float 12 in the float receiver 10 and the inlet 4 through the through hole 11a. 6 is a valve-opened state in which it is separated from 6 and descends and rests on the bottom wall 10b. The air flowing into the valve chamber 3 from the inlet 4 passes through the upper end of the float receiver 10 from the flow path between the float receiver 10 and the inner wall of the valve chamber 3, and passes through the float receiver 10 from the through hole 11 a to the outlet 5. Exhaust. Then, when the exhaust is finished and the water in the pipe flows into the valve chamber 3 from the inflow port 4, the bottom wall 10 b is displaced upward by the elastic force of the coil spring 13 and flows below the float 12 in the float receiver 10. The state of communicating with the inlet 4 through the through hole 11a is maintained, and water flows from the flow path between the float receiver 10 and the inner wall of the valve chamber 3 through the upper end of the float receiver 10 and into the float receiver 10 from the through hole 11a. The float 12 floats and sits on the valve seat 6 to close the valve. This prevents leakage of water. 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 to be in a valve-opening state on the bottom wall 10b, and the bottom wall 10b is opened from the outlet 5 to the valve chamber. 3 is displaced downward against the coil spring 13 by the momentum of the external air flowing into the float 3, and communicates with the lower part of the float 8 in the float receiver 10 and the inlet 4 through the through hole 11a and the second through hole 11b. As a result, the outside air flowing into the valve chamber 3 passes from the float receiver 10 through the through hole 11a and the second through hole 11b, and through the flow path between the float receiver 10 and the valve chamber 3 inner wall. The vacuum state is broken by introducing it into. At this time, the external air that has entered the float receiver 10 can quickly flow down from the through hole 11a and the second through hole 11b to the inlet 4, and the pressure under the float 12 in the float receiver 10 can be prevented from rising. Vacuum breaking ability is large and can be quickly broken.

The present invention exhausts the air in the pipe at the beginning of water supply, closes the valve when the exhaust is completed, and uses the exhaust valve to break the vacuum state by introducing external air when the inside of the pipe is in a vacuum state. Can do.

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Valve chamber 4 Inlet 5 Outlet 6 Valve seat 9 Rib 10 Float receptacle 10a Side wall 10b Bottom wall 11a Through hole 11b Second through hole 12 Float 13 Coil spring 15 Snap ring

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 that has a bottomed, almost cylindrical shape with a through-hole communicating with the inside and outside of the bottom wall, and the float is placed in a free state in the float receiver. The side wall is formed and fixed in the valve chamber, and the bottom wall is urged upward by an elastic member to form a second through hole in the lower part of the side wall of the float receiver. When the bottom of the float in the float receiver communicates with the inlet through the through hole and the bottom wall is displaced downward against the elastic member due to the force of external air flowing into the valve chamber from the outlet. The lower part of the float in the receptacle communicates with the inlet through the through hole and the second hole. Exhaust valve, characterized in that.

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