JP5684651B2 - 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. Form a rib, and fix a float receiver with a bottomed, almost cylindrical shape with a through hole communicating inside and outside at the bottom. Arrange the float in the float receiver in a free state. A communication path is provided that is spaced apart from the upper valve casing and communicates the inside and outside of the float receiver between the upper end of the float receiver and the upper valve casing. 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 to the outlet through the communication path and through the float receiver. When 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 communication passage and through the through hole. Sit down and close. Also, when the pressure in the piping system decreases and the vacuum state is reached, 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 communication passage. The vacuum state is broken by introducing it into the pipe from the inlet through the space between the ribs.

Japanese Utility Model Publication No. 51-54263

The conventional exhaust valve has a problem that, when water suddenly flows into the valve chamber from the inlet, the float floats late and leaks from the outlet. This is because, when water suddenly flows in, a part of the air that has passed through the communication path collides with the upper wall of the valve chamber and rebounds to bias the float downward.

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 projecting inward is formed on the inner wall of the valve chamber, and a float receiver with a bottomed, almost cylindrical shape with a through hole communicating with the inside and outside is fixed inside the rib. The float is arranged in a free state, and the upper end of the float receiver is arranged away from the upper valve casing, and a communication path is provided between the upper end of the float receiver and the upper valve casing to communicate the inside and outside of the float receiver. In the provided one, a conical inclined wall having a gradually decreasing diameter toward the upper inner outlet is attached to the upper end of the float receiver, and the communication path is formed between the upper surface of the conical inclined wall and the valve casing above it. Also characterized by It is.

In the present invention, a conical inclined wall having a gradually decreasing diameter toward the upper inner outlet is attached to the upper end of the float cover, and the communication path is formed between the upper surface of the conical inclined wall and the valve casing above it. Therefore, even if water suddenly flows into the valve chamber from the inlet, the float is urged downward by colliding with the upper surface of the conical inclined wall by colliding with the upper wall of the valve chamber. Can reduce the amount of water Therefore, the force which urges | biases a float below can be weakened and the outstanding effect that a water leak does not arise arises.

It is sectional drawing of the exhaust valve concerning embodiment of this invention.

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 inflow port 4 is formed in the lower part of the main body 1, and an outflow port 5 is formed in 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 bottom of the float receiver 10 has a through hole 11 having a small opening area that communicates the inside and outside. A spherical float 12 is placed in a free state in the float receiver 10.

A conical inclined wall 13 that gradually becomes smaller in diameter toward the upper inner outlet 5 is disposed at the upper end of the float receiver 10, and the float receiver 10 and the conical inclined wall 13 are attached to the rib 9 with a snap ring 14. A communication path 15 is formed between the upper surface of the conical inclined wall 13 and the lid 2 thereabove. The conical inclined wall 13 has an opening for the upper part of the float 12 to enter and exit from the valve seat at the center.

The operation of the exhaust valve is as follows. First, when water is fed into the pipe, the float 12 is in a valve open state in which the float 12 is separated from the valve seat 6 and lowered. Thereby, the air in the pipe flowing into the valve chamber 3 from the inlet 4 is exhausted from the space between the ribs 9 through the communication passage 15 and from the through hole 11 through the float receiver 10 to the outlet 5. Then, when the exhaust is finished and the water in the pipe flows into the valve chamber 3 from the inlet 4, the water flowing into the float receiver 10 from the space between the ribs 9 through the communication path 15 and through the through hole 11. The float 12 rises and sits on the valve seat 6 and closes. This prevents leakage of water. At this time, even if the water in the pipe suddenly flows into the valve chamber 3 from the inlet 4, the water that collides with the upper wall of the valve chamber 3 and bounces off the upper surface of the conical inclined wall 13. By reducing the amount of water that urges the float 12 downward, the force that urges the float 12 downward can be weakened, and water leakage does not occur.

When the pressure in the piping system is reduced to a vacuum state, the float 12 is separated from the valve seat 6 and lowered to open. Thus, the external air flowing into the valve chamber 3 from the outlet 5 is introduced into the pipe from the inlet 4 through the space between the communication passage 15 and the rib 9 and from the float receiver 10 through the through hole 11. To break the vacuum state.

  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 Valve port 9 Rib 10 Float receptacle 11 Through-hole 12 Float 13 Conical inclined wall 14 Snap ring 15 Communication path

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 fixed to the inside of the bottom, and the float is placed in the float receiver in a free state. The upper end of the float receiver is connected to the upper valve casing. In the case where a communication path is provided between the upper end of the float receiver and the valve casing above the float receiver and arranged to communicate with the inside and outside of the float receiver, the diameter gradually decreases toward the upper inner outlet at the upper end of the float receiver. An exhaust valve characterized in that a conical inclined wall is attached, and the communication passage is formed between the upper surface of the conical inclined wall and the valve casing thereabove.

Images