JP5517661B2 - 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 at the bottom 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 valve chamber wall in the valve chamber, and having a float in the float receiver in a free state, A second through hole is provided at the bottom of the float receiver, and a barrier member that prevents the fluid from going straight from the inflow port to the second through hole is provided on the inflow port side of the second through hole.

According to the present invention, the through hole and the second through hole are provided at the bottom of the float receiver, and the barrier member that prevents the fluid from going straight from the inflow port to the second through hole is provided on the inflow side of the second through hole. Thus, the external air that has entered the float receiver can quickly flow down to the inlet through the through hole and the second hole, and the pressure below the float in the float receiver can be prevented 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 fixed to the inside of the ribs 9 with a snap ring. The bottom of the float receiver 10 has a through-hole 11 and a second through-hole 15 that communicate between the inside and the outside. 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 a barrier member 13 via a plurality of ribs 14 on the inner wall of the inlet 4. The barrier member 13 is located substantially at the center of the inlet 4 and prevents the fluid from going straight from the inlet 4 to the second through hole 15.

The operation of the above embodiment will be described. First, when water is fed into the pipe, the float 12 is separated from the valve seat 6 and is lowered to rest on the bottom wall of the float receiver 10. The air flowing into the valve chamber 3 from the inlet 4 passes 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 from the through hole 11 to the outlet 5 through the float receiver 10. Exhaust. At this time, since the barrier member 13 prevents the air from going straight from the inlet 4 to the second through hole 15, almost no air flows into the float receiver 10 from the second through hole 15. Then, when the exhaust is finished and the water in the pipe flows into the valve chamber 3 from the inlet 4, the water passes through the upper end of the float receiver 10 through the flow path between the float receiver 10 and the inner wall of the valve chamber 3 and passes through. The air flows into the float receiver 10 from the hole 11, the float 12 floats up, sits on the valve seat 6 and closes. This prevents leakage of water. At this time, since the barrier member 13 prevents the water from going straight from the inlet 4 to the second through hole 15, water hardly flows into the float receiver 10 from the second through hole 15. 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. As a result, the external air flowing into the valve chamber 3 passes through the through hole 11 and the second through hole 15 from the float receiver 10 and passes through the flow path between the float receiver 10 and the inner wall of the valve chamber 3 to the inside of the pipe. The vacuum state is broken by introducing it into. At this time, since the external air that has entered the float receiver 10 can quickly flow down to the inlet 4 through the through hole 11 and the second through hole 15, it is possible to prevent the pressure below the float 12 in the float receiver 10 from increasing. 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.

1 Main Body 2 Lid 3 Valve Chamber 4 Inlet 5 Outlet 6 Valve Seat 9 Rib 10 Float Receiver 11 Through-hole 12 Float 13 Barrier Member 14 Rib 15 Second Through-hole

Claims (1)

Outlet in the upper opening is the inlet at the bottom in the casing to form a valve chamber having an opening, and a valve seat between the valve chamber and the outlet, between the valve chamber wall in the valve chamber It said flow straight fluid from inlet arranged float receiving having a through hole is not impeded, and distribution float in a free state in the receptacle the float on the bottom with a substantially cylindrical shape with a bottom provided with a flow path, a second through hole provided at the bottom of the float receiving, characterized in that the barrier member preventing the straight of fluid into the second through hole from the inlet provided in the inlet side of the second hole Exhaust valve.

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