JP5202965B2 - 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 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 that 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. In addition, the above-described conventional exhaust valve does not sufficiently lower the float when breaking the vacuum state, and the vacuum breaking ability is small because the half-open state or the on-off valve is repeatedly repeated. There was a problem that it took. This is because most of the outside air flowing into the valve chamber from the outlet exits straight into the float receiver and hits the bottom of the float receiver and bounces off, so that the float is lifted. Further, since the outside air that has entered the float receiver cannot pass through the through hole, the pressure below the float in the float receiver rises and the float rises.
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 and has a large vacuum breaking capability and can be quickly broken. .

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. The float receiver is suspended in the valve chamber by an elastic member in a free state, and when the air flows into the valve chamber from the inflow port or when water flows gently, the float receiver becomes a stepped portion of the rib. The float receiver is displaced to the outlet side against the elastic member by the momentum of water that suddenly flows into the valve chamber from the inlet, and is far away from the position of the rib step. Of external air flowing into the valve chamber from the outlet Ide float receiving is characterized in that the locked state at the position of the stepped portion of the ribs is displaced to the inlet side against the elastic member.

  In the present invention, the float receiver suspended in the valve chamber by the elastic member is displaced toward the outlet by the momentum of the water that suddenly flows into the valve chamber from the inlet, so that water rapidly flows into the valve chamber from the inlet. However, since the float is seated on the valve seat and closes from a slight rise in the water level in the float receiver, there is an excellent effect of preventing water leakage. In addition, the present invention provides the float and valve seat even when the float is lifted by the fact that the float receiver suspended in the valve chamber by the elastic member is displaced toward the inlet by the force of the external air flowing into the valve chamber from the outlet. A sufficient flow path can be ensured between the two, and the vacuum breaking ability is large and the vacuum breaking can be performed quickly.

  According to the present invention, the float receiver is suspended in the valve chamber by an elastic member, and the float receiver is displaced to the outlet side against the elastic member by the momentum of water that suddenly flows into the valve chamber from the inlet port. The float receiver is displaced toward the inlet side against the elastic member by the momentum of the external air flowing into the air. Therefore, as the float receiver moves to the outflow side, the float also moves to the outlet side, so the float is seated on the valve seat from a slight rise in the water level in the float receiver due to the water flowing into the float receiver through the through hole. Close the valve. Therefore, even if water suddenly flows into the valve chamber from the inlet, water leakage does not occur. In addition, even if the float is lifted by external air that bounces off the bottom of the float receiver or by a pressure increase below the float in the float receiver, a sufficient flow path can be secured between the float and the valve seat. Therefore, the vacuum breaking ability is large and can be quickly broken.

  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 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. A spherical float 12 is placed in a free state in the float receiver 10. Float receiving 10 are slightly away state from the position of the step portion 14 of the rib 9, as shown when and water slowly flows when air from the inlet 4 into the valve chamber 3 flows, flow When water suddenly flows into the valve chamber 3 from the inlet 4, it is displaced from the state shown in the figure to the outlet 5 side against the coil spring 13 by the momentum of the water and is far away from the position of the step portion 14 of the rib 9. When the vacuum breaks, the momentum of the external air flowing into the valve chamber 3 from the outlet 5 against the coil spring 13 is displaced from the state shown in the figure to the inlet 4 side and is engaged at the position of the step portion 14 of the rib 9. It will be stopped.

  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 in a state slightly separated from the step portion 14 of the rib 9. The float 12 is separated from the valve seat 6 and is lowered to rest on the bottom wall of the float 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 the water in the pipe gently flows into the valve chamber 3 from the inlet 4, the float receiver 10 maintains a state slightly separated from the step portion 14 of the rib 9. 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. At this time, the float receiver 10 is displaced toward the inlet 4 against the coil spring 13 by the momentum of the external air flowing into the valve chamber 3 from the outlet 5 and is locked by the step portion 14 of the rib 9. Therefore, even if the float 12 floats up due to external air that bounces off the bottom of the float receiver 10 or due to an increase in pressure below the float 12 in the float receiver 10, a sufficient flow path is secured between the float 12 and the valve seat 6. it can.

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. When air flows into the valve chamber from the inflow port or when water flows in slowly, the float receiver is slightly away from the stepped portion of the rib and the water that suddenly flows into the valve chamber from the inflow port The float receiver is displaced to the outlet side against the elastic member by the momentum and becomes far away from the stepped portion of the rib, and the float receiver becomes the elastic member by the momentum of the external air flowing into the valve chamber from the outlet port. of the ribs is displaced to the inlet side and anti An exhaust valve, characterized in that the locked state at the position of the parts.

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