JP5431034B2 - 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 in the lower part and an outlet opening in the upper part, forming a valve seat between the valve chamber and the outlet, and forming a rib protruding inward on the valve chamber wall. Then, a float receiver having a substantially cylindrical shape with a bottom on the inside of the rib and having a through hole communicating with the inside and the outside at the bottom is fixed, 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 pipe, the float is separated from the valve seat and descends, and the air in the pipe flowing into the valve chamber from the inlet is drawn from the space between the ribs. Exhaust through the upper end of the float receiver and through the inside of the float receiver to the outlet. Then, when the exhaust is finished and the water in the pipe flows into the valve chamber from the inlet, the float floats by the water flowing into the float receiver from the space between the ribs through the float receiver upper end and through the through hole. Sit on the seat and close the valve. 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 through the float receiver. The vacuum state is broken by introducing into the pipe from the inlet through the space between the upper end and the rib.

Japanese Utility Model Publication No. 53-1622

In the conventional exhaust valve, when the vacuum state is broken, the float does not drop sufficiently, and the valve is half open, or the on-off valve is repeated little by little, so the vacuum breaking ability is small and it takes time to break the vacuum. 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 rib that protrudes inward is formed on the valve chamber wall, and a float receiver that has a bottomed, almost cylindrical shape with a through hole that communicates the inside and outside is arranged inside the rib. In the case where the float receiver is arranged in a state, a second through hole is provided at the bottom of the float receiver so that the inside and outside communicate with each other. An opening / closing member for closing the two through holes is provided, and the float receiver is displaced toward the inlet side against the elastic member by the force of the external air flowing into the valve chamber from the outlet and opens the second through hole. It is what.

According to the present invention, the float receiver arranged suspended by the elastic member in the valve chamber is displaced toward the inlet side against the elastic member by the force of the external air flowing into the valve chamber from the outlet port, and the second through hole Therefore, the external air that has entered the float receiver is quickly introduced to the inlet side through the through hole and the second through hole, thereby preventing the pressure below the float in the float receiver from increasing. Therefore, there is an effect that the vacuum breaking ability is large and the vacuum breaking can be performed quickly.

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 through hole 11 having a small opening area communicating with the inside and the outside and a second through hole 8 having a larger opening area than the through hole 11 at the bottom thereof. A spherical float 12 is placed in a free state in the float receiver 10.

The main body 1 integrally has an attachment member 15 via a plurality of ribs 14 protruding inwardly on the inner wall of the inlet 4. An opening / closing member 16 is screwed to the mounting member 15, and is loosened with a lock nut 17. In the opening / closing member 16, the upper circular plate portion 18 located in the float receiver 10 opens and closes the second through hole 8 of the float receiver 10. The float receiver 10 is suspended in the valve chamber 3 by a coil spring 13 as an elastic member fixed to the upper end of the float receiver 10 and the lower end of the lid 2, and is engaged with the disk portion 18 of the opening / closing member 16. The float receiver 10 is locked by the disk portion 18 of the opening / closing member 16 when the air or water flows into the valve chamber 3 from the inlet 4 and the second through hole 8 is closed. 5 is displaced toward the inlet 4 side against the coil spring 13 by the momentum of the external air flowing into the valve chamber 3, and the second through hole 8 is opened and locked by the step portion 19 of the rib 9.

The operation of the exhaust valve of the above embodiment is as follows. First, when water is fed into the pipe, the float receiver 10 is urged toward the outflow port 5 by the urging force of the coil spring 13 and is locked by the disc portion 18 of the opening / closing member 16 so that the second through hole 8 is closed. The valve is in a valve-opened state in which it is separated from the seat 6 and lowered and placed on the disk portion 18 of the opening / closing member 16. Thereby, the air in the pipe flowing into the valve chamber 3 is exhausted from the space 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.

When the exhaust is finished and water in the pipe flows into the valve chamber 3 from the inlet 4, the float 12 enters the float receiver 10 from the space between the ribs 9 through the upper end of the float receiver 10 and through the through hole 11. It floats by the inflowing water, sits on the valve seat 6 and closes. This prevents leakage of water. When the pressure in the piping system is reduced to a vacuum state, the float receiver 10 is displaced to the inlet 4 side against the coil spring 13 by the force of the external air flowing into the valve chamber 3 from the outlet 5 to the second passage. The hole 8 is opened and locked by the step portion 19 of the rib 9, and the float 12 is separated from the valve seat 6 and descends to be in a valve-opened state on the disk portion 18 of the opening / closing member 16. As a result, the external air flowing into the valve chamber 3 passes through the space between the upper end of the float receiver 10 and the rib 9 and from the inside of the float receiver 10 through the through hole 11 and the second through hole 8 into the pipe. The vacuum state is broken by introducing. At this time, the external air that has entered the float receiver 10 is quickly introduced to the inlet 4 side through the through hole 11 and the second through hole 8, and the pressure below the float 12 in the float receiver 10 is prevented from rising. Therefore, the vacuum breaking ability is large and can be quickly broken.

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 2nd through-hole 9 Rib 10 Float receptacle 11 Through-hole 12 Float 13 Coil spring 16 Opening / closing member 18 Disk part

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, forming a rib projecting inwardly into the valve chamber wall and, arranged float received in which a through hole for communicating the inside and outside on the bottom in the generally cylindrical shape of the bottomed inside the rib, in that arranged float in receiving the float in a free state, the float receiving the a second hole for communicating the inside and outside at the bottom is provided, closing the second hole when the float receiving is displaced to the outlet port side with disposing the float receiving hung in the valve chamber by an elastic member to provide a closing member is fixed to the casing, the displacement from the outlet to the inlet side with respect to the closing member receiving the float momentum of the external air against the elastic member entering into the valve chamber the second hole and An exhaust valve, characterized in that the openings.

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