JP2010249232A - Exhaust valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust valve having large vacuum break capacity, and quickly performing a vacuum break. <P>SOLUTION: In the exhaust valve, a casing including a body 1 and a cover 2 forms a valve chest 3 which includes an inflow port 4 opened in a lower part and an outflow port 5 opened in an upper part. A valve seat 6 is formed between the valve chest 3 and the outflow port 5. The body 1 includes a plurality of ribs 9 integrated with an inner wall of the valve chest 3 and protruded inside, and a bottomed and approximately cylindrical float support 10 having a through-hole 11 and a second through-hole 8 for communicating an inside with an outside thereof is arranged inside the ribs 9. A spherical float 12 is arranged in the float support 10 in a free condition. The float support 10 is energized to the outflow port 5 side to be arranged by a coil spring 13 as an elastic member, and an opening and closing member 16 is provided for closing the second through-hole 8 when the float support 10 is displaced to the outflow port 5 side. The float support 10 is displaced to the inflow port 4 side against the coil spring 13, and the second through-hole 8 is opened with energy of outside air suddenly flowing through the outflow port 5 into the valve chest 3. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

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. When the float receiver is provided with a second through hole at the bottom of the float receiver, and the float receiver is urged toward the outlet by an elastic member, and the float receiver is displaced toward the outlet. An opening / closing member for closing the second through hole 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 characterized by.

According to the present invention, 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. The outside air that has entered is quickly introduced to the inlet side through the through hole and the second through hole, and the pressure below the float in the float receiver is prevented from rising. Therefore, there is an effect that the vacuum breaking ability is large and can be quickly broken.

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 disc 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 urged toward the outflow port 5 by a coil spring 13 as an elastic member disposed between the lower portion of the float receiver 10 and the bottom wall of the valve chamber 3, and is locked by the disk portion 18 of the opening / closing member 16. Arrange. 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 disc 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)

In the casing, a valve chamber is formed with an inlet opening at the bottom and an outlet opening at the top, a valve seat is formed between the valve chamber and the outlet, and a rib protruding inward is formed on the valve chamber wall. A float receiver with a bottomed, almost cylindrical shape with a through hole that communicates the inside and outside of the bottom is arranged, and the float is arranged in a free state in the float receiver, and the inside and outside communicate with the bottom of the float receiver. A second through hole is provided, and the float receiver is urged and arranged on the outlet side by an elastic member, and an opening / closing member is provided to close the second through hole when the float receiver is displaced to the outlet side. An exhaust valve characterized in that the float receiver is displaced toward the inlet side against the elastic member by the momentum of the external air flowing into the valve chamber and opens the second through hole.

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