JP2007162886A - Exhaust valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust valve not causing water leakage even when water rapidly flows into a valve chamber from an inlet. <P>SOLUTION: The valve chamber 3 opened with the inlet 4 in a lower part, and opened with an outlet 5 in an upper part is formed in a casing comprised of a body 1 and a lid 2. A valve seat 6 is formed between the valve chamber 3 and the outlet 5. The body 1 integrally has a plurality of ribs 9 protruding inward on a valve chamber 3 inner wall, and a float receiver 10 with a bottomed substantially cylindrical shape, provided with a through hole 11 communicating an inner side with an outer side, is arranged in an inner side of the ribs 9. A spherical float 12 is arranged in a free state in the float receiver 10. The float receiver 10 is arranged, energized toward an inlet 4 side by a coil spring 13 used as an elastic member. The float receiver 10 is energized toward the inlet 4 side by energizing force of the coil spring 13, and it is not displaced toward an outlet 5 side when air flows in or water gradually flows into the valve chamber 3 from the inlet 4, but when water rapidly flows in, it is displaced toward the outlet 5 side against the coil spring 13 by force of the water. <P>COPYRIGHT: (C)2007,JPO&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 forms a valve chamber with an inlet opening at the bottom and an outlet opening at the top of the casing, forming a valve seat between the valve chamber and the outlet, and projecting inward to the valve chamber wall. A float receiver is formed in which a rib is formed, and a bottom having a substantially cylindrical shape with a bottom and a through hole communicating with the inside and the outside is fixed to the inside of the rib, 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.

The conventional exhaust valve has a problem that water leaks from the outlet when water suddenly flows into the valve chamber from the inlet. This is because the opening area of the through hole at the bottom of the float receiver is small, so the rise of the water level in the float receiver is delayed, so that the float rises late, and part of the water that passes through the float receiver upper end from the space between the ribs This is because water leaks.
Japanese Utility Model Publication No. 53-1622

  Therefore, the technical problem of the present invention is to provide an exhaust valve that does not cause water leakage even when water suddenly flows into the valve chamber from the inlet.

  The technical means of the present invention taken in order to solve the above technical problem is to form a valve chamber having an inflow opening in the lower part and an outflow opening in the upper part in the casing, and between the valve chamber and the outflow opening. A valve seat is formed, a rib that protrudes inward is formed on the inner wall of the valve chamber, 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 this case, the float receiver is urged toward the inlet by an elastic member, and the float receiver resists the elastic member by the force of water that suddenly flows into the valve chamber from the inlet. And is displaced to the outlet side.

  In the present invention, the float receiver is urged toward the inlet side by an elastic member, and the float receiver is displaced toward the outlet side against the elastic member by the force of water that suddenly flows into the valve chamber from the inlet. Therefore, even if water suddenly flows into the valve chamber from the inflow port, the float sits on the valve seat and closes from a slight rise in the water level in the float receiver, so that an excellent effect of preventing water leakage is achieved. Arise.

  In the present invention, the float receiver urged toward the inlet by the elastic member is displaced toward the outlet against the elastic member by the force of water that suddenly flows into the valve chamber from the inlet. As the float receiver is displaced toward the outflow side, the float is also displaced toward the outflow side. Therefore, the float is seated on the valve seat and is closed when the water level in the float receiver slightly rises due to the water flowing into the float receiver through the through hole. Therefore, even if water suddenly flows into the valve chamber from the inlet, water leakage does not occur.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). 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 at the bottom. The float receiver 10 is urged toward the inflow port 4 by a coil spring 13 as an elastic member disposed between the upper end of the float receiver 10 and the lower end of the lid 2, and is engaged with the step portion 14 of the rib 9.

  The float receiver 10 is urged toward the inlet 4 by the biasing force of the coil spring 13 when air flows into the valve chamber 3 from the inlet 4 or when water slowly flows into the valve chamber 3 and is locked by the step 14 of the rib 9. However, when water suddenly flows in, it is displaced toward the outlet 5 against the coil spring 13 by the momentum of the water. A spherical float 12 is placed in a free state in the float receiver 10.

  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 inlet 4 by the urging force of the coil spring 13 and is locked by the step portion 14 of the rib 9, and the float 12 moves away from the valve seat 6 and descends. The valve is open on the bottom wall of the receiver 10. 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 gently flows into the valve chamber 3 from the inlet 4, the float receiver 10 is urged toward the inlet 4 by the urging force of the coil spring 13, and the step portion of the rib 9. 14 is maintained in the locked state. When the water in the pipe suddenly flows into the valve chamber 3 from the inlet 4, the float receiver 10 is displaced toward the outlet 5 against the coil spring 13 by the force of the water, and the float 12 is valved. Move closer to seat 6. The float 12 floats by the water flowing into 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, and is seated on the valve seat 6 to be closed. 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, and the valve 12 is placed on the bottom wall of the float receiver 10. Thus, the external air flowing into the valve chamber 3 is introduced into the pipe through the space between the rib receiver 9 from the upper end of the float receiver 10 and from the inlet 4 into the pipe through the through hole 11 from the float receiver 10. Destroy.

Sectional drawing of the exhaust valve of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Valve chamber 4 Inlet 5 Outlet 6 Valve seat 9 Rib 10 Float receptacle 11 Through-hole 12 Float 13 Coil spring

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 communicating inside and outside is arranged at the bottom, and the float is arranged in a free state in the float receiver. An exhaust valve characterized in that the float receiver is displaced toward the outlet side against the elastic member by the momentum of water that suddenly flows into the valve chamber from the inlet port.

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