JP5728200B2 - 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 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 the valve chamber, a float receiver having a substantially cylindrical shape with a bottom provided with a flow path between the valve chamber wall and a through hole is provided, and the float receiver is arranged in a free state in the float receiver. The side wall and bottom wall of the float receiver are formed separately to fix the side wall in the valve chamber, and the bottom wall is urged upward by an elastic member. The bottom end opening of the side wall is closed when the bottom wall is displaced downward against the elastic member by the momentum of the external air flowing into the valve chamber from the outlet port. It is a feature.

According to the present invention, the through hole is formed in the side wall of the float receiver, 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 the elastic member. When the bottom wall is displaced upward, the bottom end opening of the side wall is closed, and when the bottom wall is displaced downward against the elastic member by the force of external air flowing into the valve chamber from the outlet, By opening the lower end opening, external air that has entered the float receiver can quickly flow from the lower end opening of the opened side wall to the inflow port, 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 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 is displaced upward by the elastic force of the coil spring 13 when air or water flows into the valve chamber 3 from the inlet 4 and closes the lower end opening of the side wall 10a. The momentum of the external air flowing into the chamber 3 is displaced downward against the coil spring 13 to open the lower end opening of the side wall 10a.

The side wall 10a of the float receiver 10 has a through hole 11 that communicates 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 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 close the lower end opening of the side wall 10a, and the float 12 is separated from the valve seat 6 and descends and is placed on the bottom wall 10b. The valve is open. 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. When the exhaust is finished and the water in the pipe flows into the valve chamber 3 from the inlet 4, the bottom wall 10 b is displaced upward by the elastic force of the coil spring 13 to close the lower end opening of the side wall 10 a. The water flows 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 into the float receiver 10 from the through hole 11, and the float 12 floats and sits on the valve seat 6. Then 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 interior 3 to open the lower end opening of the side wall 10a. As a result, the outside air flowing into the valve chamber 3 passes from the float receiver 10 through the lower end opening of the side wall 10a and the through hole 11 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, external air that has entered the float receiver 10 can quickly flow from the lower end opening of the opened side wall 10a to the inflow port 4 and can prevent the pressure under the float 12 in the float receiver 10 from rising. It has a high breaking ability and can be quickly broken in vacuum.

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 11 Through-hole 12 Float 13 Coil spring 15 Snap ring

Claims (1)

Forming a valve chamber outlet to the inlet are open top to bottom and open at the casing to form a valve seat between said outlet and said valve chamber, between the valve chamber wall in the valve chamber arranged float receiving having a bottomed generally cylindrical shape through hole of which is provided a flow path, coordinated float in receiving the float in a free state, the through hole is formed in the side wall of the float receiving said float It said side walls said to form a side wall and a bottom wall to separate the receiving arranged to urge the bottom wall upwardly with the elastic member is fixed to the valve chamber, when said bottom wall is displaced upward of the side wall when the bottom wall which the float drops while closing the lower end opening of the side wall rests is displaced downward against the elastic member in the force of the external air flowing into the valve chamber from the outlet an exhaust valve, characterized by opening the lower opening.

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