JP2009019733A - Exhaust valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust valve which has large vacuum break capacity and can quickly break vacuum without causing water leak even if water rapidly flows into a valve chamber from an inflow port. <P>SOLUTION: The valve chamber 3 having the inflow port 4 opened at a lower part and having an outflow port 5 opened at an upper part is formed by a casing comprising a main body 1 and a lid 2. A valve seat 6 is formed between the valve chamber 3 and the outflow port 5. The main body 1 includes a plurality of ribs 9 projecting inward as one unit on an inner wall of the valve chamber 3, and a float receiver 10 of a bottomed roughly cylindrical shape provided with a through-hole 11 keeping communication between an inside and outside at a bottom part is arranged inside of the ribs 9. A spherical float 12 is arranged in the float receiver 10 in a free state. The float receiver 10 is arranged in such a manner that the same can freely displace up and down. The float receiver 10 displaces to the outflow port 5 side by power of water rapidly flowing into the valve chamber 3 from the inflow port 4 and displaces to the inflow port 4 side by power of outside air flowing into the valve chamber 3 from the outflow port 5. <P>COPYRIGHT: (C)2009,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 upper part 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. 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 and it takes time to break the vacuum because the open / close valve is repeatedly opened in a half-open state. There was a problem. This is because most of the external air that flows into the valve chamber from the outlet flows straight into the float receiver and bounces back against the bottom of the float receiver, 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 arranged so as to be freely displaceable in the vertical direction, and the float receiver is displaced to the outlet side by the momentum of water that suddenly flows into the valve chamber from the inlet port. The float receiver is displaced to the inlet side by the momentum of the external air flowing into the inlet.

  In the present invention, the float receiver, which is arranged so as to be displaceable up and down, is displaced toward the outlet by the momentum of water that suddenly flows into the valve chamber from the inlet, so that water suddenly 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, an excellent effect of preventing water leakage is produced. In addition, the present invention allows the float receiver, which is arranged so as to be freely displaceable up and down, to be displaced toward the inlet side by the force of external air flowing into the valve chamber from the outlet port, so that the float and the valve seat A sufficient flow path can be secured between them, and an excellent effect is achieved in that the vacuum breaking ability is large and the vacuum breaking can be performed quickly.

  In the present invention, the float receiver is arranged so as to be freely displaceable up and down, and the force of water that suddenly flows into the valve chamber from the inlet is displaced to the outlet side by the momentum of water that flows into the valve chamber. The float receiver is displaced toward the inlet. 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 projecting inwardly on the inner wall of the valve chamber 3, and a bottomed substantially cylindrical float receiver 10 is disposed inside the ribs 9 so as to be displaceable up and down. The float receiver 10 has a through hole 11 having a small opening area communicating with the inside and the outside at the bottom. A spherical float 12 is placed in a free state in the float receiver 10. The float receiver 10 is displaced toward the inflow port 4 when air flows into the valve chamber 3 from the inflow port 4 or when water slowly flows in, and is locked by the step portion 14 of the rib 9. When water suddenly flows into the valve chamber 3 from the outlet, it is displaced toward the outlet 5 by the momentum of the water, and the upper end is locked by the snap ring 15, and flows into the valve chamber 3 from the outlet 5 at the time of vacuum break. It is displaced to the inlet 4 side by the momentum of the outside air and is locked by the step portion 14 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 displaced toward the inlet 4 and is locked by the step portion 14 of the rib 9. The float 12 is in a valve-opened state in which the float 12 is separated from the valve seat 6 and lowered to rest on the bottom wall of the float receiver 10. As a result, 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 inflow port 4, the float receiver 10 maintains the state of being locked by the step portion 14 of the rib 9. Further, 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 with the force of water and brings the float 12 closer to the valve 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 to be in a valve-opened state on the bottom wall of the float receiver 10. Thereby, the external air flowing into the valve chamber 3 is introduced into the pipe from the inlet 4 through the space between the upper end of the float receiver 10 and the rib 9 and through the through hole 11 from the float receiver 10 into the pipe. Destroy. At this time, the float receiver 10 is displaced toward the inflow port 4 by the momentum of the external air flowing into the valve chamber 3 from the outflow port 5 and is locked by the step portion 14 of the rib 9. Therefore, even if the float 12 is lifted up by the external air that bounces off the bottom of the float receiver 10 and the pressure rise 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

1 Body 2 Lid 3 Valve Chamber 4 Inlet 5 Outlet 6 Valve Seat 9 Rib 10 Float Receptor 11 Through Hole 12 Float

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 on the inside of the float, and the float receiver is arranged freely in the float receiver. The float receiver is displaced to the outlet side by the momentum of water that suddenly flows into the valve chamber from the inlet, and the float receiver is displaced to the inlet side by the momentum of external air flowing from the outlet to the valve chamber. And exhaust valve.

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