JPH0454380Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention can be attached to water piping for cold water, hot water, etc.
The present invention relates to an exhaust valve for exhausting air in piping, and in particular to one that can rapidly exhaust air in piping at the beginning of water supply, and then discharge the air each time it accumulates.

The exhaust valve includes a so-called initial rapid exhaust valve, which rapidly exhausts the air in the piping at the beginning of water supply, closes when the exhaust is finished and water comes, and then remains closed, and another that closes when water arrives. There is a so-called automatic exhaust valve that discharges air whenever it accumulates. The present invention relates to an improvement in a valve having both an initial rapid exhaust valve and an automatic exhaust function.

2. Description of the Related Art An exhaust valve having the functions of both an initial rapid exhaust valve and an automatic exhaust valve is disclosed in, for example, Japanese Utility Model Publication No. 37860/1983. This has a casing that forms a valve chamber inside, an inlet at the bottom of the valve chamber, a small valve port and a large valve port leading to the outlet at the top, and a spherical float and large valve port that open and close the small valve port. An inverted cup-shaped external float with a flat top that opens and closes is placed freely in the valve chamber, and a slight gap is formed between them so that the spherical float can be guided by the inner peripheral surface of the external float. An opening is provided on the top surface of the external float so that the small valve port can be opened and closed.

Problems to be Solved by the Present Invention However, with this device, there is a problem that the valve closes before the initial air is completely exhausted. In other words, the spherical float and external float placed in a free state inside the valve chamber are likely to sway, and since a large amount of air passes through the valve chamber at high speed, the spherical float and external float are lifted by the wind pressure of this high-speed air. This is because the small valve port and the large valve port are closed, respectively.

Therefore, the technical problem of the present invention is to prevent the float from closing the valve port due to the wind pressure of the air.

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problems is to form a valve chamber inside the casing, have an inlet at the bottom of the valve chamber, and an outlet at the top. A small valve port and a large valve port are formed, a cup-shaped float receiver is arranged at the bottom of the valve chamber, a large passage is formed between the outer periphery of the float receiver and the inner wall of the valve chamber, and a small passage is arranged at the bottom of the float receiver. A hole is drilled, a spherical float that opens and closes the small valve port is placed freely in the float receiver, a lever with a valve body that opens and closes the large valve port is attached to one end, and the other end of the lever is hinged to the valve chamber. It extends above the float so that the floating spherical float comes into contact with it, and an opening is formed at the other end of the lever so that the spherical float can open and close the small valve port.

Effect The operation of the above technical means is as follows.

At the beginning of water supply, most of the initial air passes between the outer periphery of the float receiver and the wall of the valve chamber and is discharged from the valve port to the outlet, so the amount of discharged air passing through the hole is small and the float is blown up. I never get caught. One end of the lever is hinged to the valve chamber and is operated by the floating of a float, so it is not subject to air pressure. Therefore, after the initial air is completely exhausted, the float floats up along with the water level in the valve chamber, lifts the lever, and closes the large valve port and the small valve port with the valve body. After that, the valve body attached to the lever remains closed, and the float rises and falls as the water level in the valve chamber increases to open and close the small valve port, automatically discharging only air without letting water escape.

Effect of invention The present invention produces the following specific effects.

In the conventional type, the large valve port is opened and closed using an inverted cup-shaped external float with a flat top, so there is a risk that the external float may tilt, and if it gets caught on the wall of the valve chamber, it is inconvenient that the large valve port cannot be closed reliably. There is. In the present invention, since the large valve opening is opened and closed using a valve body attached to a lever, the large valve opening can be reliably closed without getting caught on the wall of the valve chamber.

Embodiment An embodiment illustrating a specific example of the above technical means will be described (see FIG. 1).

A valve casing is formed by fastening a lid 2 to a main body 1 with bolts (not shown), and a valve chamber 3 is formed inside. An inlet 4 is formed in the lower part of the valve chamber 3, and an outlet 5 is formed in the upper part. The inlet 4 and the outlet 5 are formed with internal threads for connecting piping.

A first valve seat 6 and a second valve seat 7 are screwed to the lid 2. A small valve port 8 is formed in the first valve seat 6, and a small valve port 8 is formed in the second valve seat 7.
A large valve opening 9 is formed in the. The small valve port 8 and the large valve port 9 communicate with the outlet 5 through an outlet passage 10.

Several ribs 11 are formed on the inner wall of the valve chamber 4, and the ribs 1
Attach the float receiver 12 to 1 using the snap spring 13. The float receiver 13 is generally cylindrical and has a bottom at its lower end, with several small holes 14 formed in a conical portion formed in the bottom. A sufficiently wide passage is formed between the outside of the float receiver 12 and the inner wall of the valve chamber 4.

Hollow spherical float 15 inside float receiver 12
Place it in a free state. The float 15 directly opens and closes the small valve port 8 on its outer surface. Lever 16 on lid 2
, one end of which is hinged with pin 17,
Allows rotation using the fulcrum. Lever 16
A valve body 18 for opening and closing the large valve port 9 is attached with a snap spring 19. The side of the lever 16 to which the valve body 18 is attached has an elongated rectangular shape, and the other end is a float 15.
It is formed into a ring shape so that it can go in and out to open and close the small valve port 8. Several ribs are provided in the opening 20 of the ring-shaped portion to prevent the float 15 from blocking the opening 20.

At the beginning of water supply, the float 15 sinks to the bottom of the float receiver 12 to open the small valve port 8, and the lever 16 rotates counterclockwise from the illustrated state so that the valve body 18 opens the large valve port. 9 is open. Most of the initial air passes between the outer periphery of the float receiver 12 and the inner wall of the valve chamber 3, and a part of it passes through the float receiver 12.
It passes through the through hole 14 and is discharged to the outlet from the small valve port 8 and the large valve port 9. Since the amount of exhaust air passing through the through hole 14 is small, the float 15 is not blown up. When the initial air exhaust is completed and the water level in the valve chamber 4 rises, the float 15 rises, lifts the lever 16, closes the large valve port 9 with the valve body 18, and closes the small valve port 8. . Thereafter, the valve body 18 attached to the lever 16 remains closed, and the float 15 ascends and descends with the water level in the valve chamber 3 to open and close the small valve port 8, automatically discharging only air without letting water escape. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an exhaust valve according to an embodiment of the present invention. 3... Valve chamber, 4... Inlet, 5... Outlet, 8...
Small valve port, 9...Large valve port, 12...Float receiver,
14...Through hole, 15...Float, 16...Lever, 18...Valve body, 20...Opening.

Claims (1)

[Scope of utility model registration request] A valve chamber is formed inside the casing, an inlet is formed at the bottom of the valve chamber, a small valve port and a large valve port leading to the outlet are formed at the top, and a cup-shaped float receiver is placed at the bottom of the valve chamber. A large passage is formed between the outer periphery of the valve chamber and the inner wall of the valve chamber, a small passage is made at the bottom of the float receiver, a spherical float is placed freely inside the float receiver to open and close the small valve port, and the large valve is placed at one end. A lever with a valve body for opening and closing the mouth is hinged to the valve chamber, and the other end of the lever is extended above the float so that it comes into contact with the floating spherical float. An exhaust valve with an opening that can be opened and closed.