JP2009019730A - Exhaust valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent water from leaking even when water sharply flows from an inlet into a valve chest. <P>SOLUTION: The valve chest 3 is formed of a casing comprising a body 1 and a lid 2 and having the inlet 4 opened on a lower part and an outlet 5 opened on an upper part. A valve seat 6 is formed between the valve chest 3 and the outlet 5. The body 1 integrally has a plurality of ribs 9 projecting inward on the inner wall of the valve chest 3, and a bottomed float receiver 10, which is formed in almost cylindrical shape and has a through hole 11 with a small opening area at the bottom thereof for communication between the inside and the outside, is arranged inside the rib 9. A spherical float 12 is arranged in a free state in the float receiver 10. The bottom of the float receiver 10 has a communication hole 13 with a large opening area for communication between the inside and the outside, and a water flow receiving member 14 for opening and closing the communication hole 13. The water flow receiving member 14 opens the communication hole 13 by the force of water sharply flowing from the inlet 4 into the valve chest 3. <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 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 that has a rib and has a bottomed, almost cylindrical shape with a small opening area that communicates the inside and outside of the rib. The float is placed in the float receiver in a free state. is there. 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 substantially cylindrical shape with a bottom on the inside of the rib and a small opening area through hole that communicates the inside and outside of the bottom is arranged. The float is arranged in the float receiver in a free state, a communication hole having a large opening area is provided at the bottom of the float receiver, and a water receiving member for opening and closing the communication hole is provided. The water flow receiving member opens the communication hole by the momentum of the inflowing water.

  In the present invention, when water suddenly flows into the valve chamber from the inflow port, the water flow receiving member opens a communication hole having a large opening area, so that the water level in the float receiver is quickly raised and the float rises quickly. As a result, an excellent effect of preventing water leakage is produced.

  The present invention provides a communication hole having a large opening area that communicates the inside and the outside at the bottom of the float receiver, a water receiving member that opens and closes the communication hole, and a water receiving member by the momentum of water that suddenly flows into the valve chamber from the inlet Is to open the communication hole. Therefore, when water suddenly flows into the valve chamber from the inflow port, the water flow receiving member opens a communication hole with a large opening area, so that the water level in the float receiver can be quickly raised and the float can rise quickly. it can. 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 fixed to the inside of the ribs 9 with a snap ring. 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 has a communication hole 13 communicating with the inside and outside at the bottom. The communication hole 13 is formed in an opening area larger than that of the through hole 11 in order to allow water that suddenly flows into the valve chamber 3 from the inlet 4 to flow into the float receiver 10.

  A water flow receiving member 14 that opens and closes the communication hole 13 is fixed to the inside of the float receiver 10 with screws. The water flow receiving member 14 is made of a flat elastic metal material, and when the air flows into the valve chamber 3 from the inlet 4 or when the water flows gently, the communication hole 13 is closed and the water flows in rapidly. Opens the communication hole 13 by rotating clockwise with the fixed portion as a fulcrum by the momentum of water.

  The operation of the exhaust valve of the above embodiment is as follows. First, when water is fed into the pipe, the water flow receiving member 14 closes the communication hole 13. The float 12 is separated from the valve seat 6 and descends and is in a valve-opened state on the rib of the inclined 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 inlet 4, the water flow receiving member 14 maintains the communication hole 13 closed. 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. Further, when water in the pipe suddenly flows into the valve chamber 3 from the inlet 4, the water flow receiving member 14 opens the communication hole 13 with the force of water. The float 12 quickly floats by 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 the communication hole 13, and quickly sits on the valve seat 6 and closes the valve. 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 inclined wall rib 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.

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 Communication hole 14 Water-flow receiving member

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 small opening area that communicates the inside and outside of the bottom is placed inside, and the float is placed in the float receiver in a free state. Exhaust gas characterized in that a communication hole having a large opening area for communication is provided, a water flow receiving member for opening and closing the communication hole is provided, and the water flow receiving member opens the communication hole by the momentum of water that suddenly flows into the valve chamber from the inlet. valve.

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