JPS5929188Y2 - automatic air vent valve - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of an air vent valve which has a relatively large displacement.

Air vent valve with small displacement, for example, the maximum displacement is 5t/
There was no problem if the exhaust was about 20 t/min, but if the displacement exceeded that amount, water could be spewed out just before the end of the exhaust.

Because the displacement is large, the float cannot follow the water head that flows into the valve body with great force, and water is ejected.

For this reason, if installed above electrical components such as a boiler, the water that spewed out could cause the electrical components to malfunction or become contaminated.

The purpose of this invention is to solve these problems, and the gist of the invention is to install an exhaust valve above the valve body, provide a float chamber below which stores the float, and provide an opening in the piping below the exhaust valve. The float is connected to an exhaust valve by a lever, and in an automatic air vent valve that opens and closes the exhaust valve by vertical movement of the float, a buffer chamber storing a buffer body is communicated with the lower part of the float chamber. An opening opening into the pipe is provided below, and one side of the buffer body is semispherical or conical, and the other side is provided with a locking part by protruding a gas-liquid displacement plate from a spherical or circular center. A buffer body is formed by the locking part, the locking part is inserted into the float chamber, and the locking part is inserted into the float chamber and is irremovably engaged with the locking part.

The present invention will be explained in more detail below with reference to an embodiment shown in the drawings.

In FIG. 1, 1 is a valve cover, 2 is a valve body, and 3 is a float chamber which houses a float 4. A buffer chamber 5 is provided in communication with the lower part of the float chamber 3.

An opening 6 communicating with the inside of the pipe is installed below the buffer chamber 5, and a buffer body 7 is provided in the buffer chamber 5. This buffer body 7 includes a gas-liquid displacement plate 8 and an annular protrusion of the main body 2. A plate-shaped locking portion 10 having a length larger than the inner diameter of the hemisphere 10 and a hemispherical portion 11 having a length larger than the inner diameter of the hemisphere are provided, and a groove 13 is provided in the flat surface 12 of the hemisphere, thereby forming a buffer body I. .

A seat 14 is provided on the buffer chamber side surface of the annular protrusion 9, and an exhaust port 15 open to the atmosphere is provided on the valve seat 16.
The exhaust valve 19 is pressed against the valve seat 16 by the spring 18.

The exhaust valve 19 is linked to the float 4 by a lever 20.

Next, regarding operation, the lower opening 6 of the valve body 2 attached to the pipe is conducted into the pipe, so when water is supplied into the pipe, the air inside the pipe flows through the opening 6 and into the buffer chamber. 5, float chamber 3, and is discharged through the exhaust port 15.

At this time, the exhaust valve 19 is moved to the lever 2 due to the load of the float 4.
The exhaust port 15 is opened obliquely with the contact point of the valve seat 16 as a fulcrum via the valve seat 16.

When the air is discharged and water enters the buffer chamber through the opening 6, the buffer body I is lifted by the fluid resistance of the water and the hemispherical plane 12 is pressed against the seat 14 of the annular protrusion 8.

Since a groove 13 is carved in the plane 12, the water flowing in with force is reduced there and enters the float chamber 3.

Therefore, the water head inside the float chamber 3 rises quietly, so the float 4 can easily follow the water head and close the exhaust valve 19 at a constant water head.

When the water in the groove 13 runs out, the buffer I falls downward due to its own weight, but since the locking part 10 is locked to the upper surface of the annular protrusion 9, it does not fall any further downward.

A small amount of air generated in the old piping passes through the opening 6 due to buoyancy and is collected in the buffer chamber 5, and due to the effect of the gas-liquid displacement plate 8, it is replaced with water in the float chamber 3 and collected in the float chamber 3. .

Therefore, the water head inside the float chamber 3 falls, and the float 4
While descending, the float's own weight is applied to the exhaust valve 19 via the lever 20, tilting the exhaust valve 19, opening the exhaust port 15, and exhausting the air.

As the air is exhausted, the water head rises, causing the float 4 to float and the exhaust valve 19 to close.

This operation can be repeated.

FIG. 2 shows one embodiment of the buffer.

The buffer body 7 has a locking part 10 on the upper side, a gas-liquid displacement plate 8 below the locking part 10, and a conical body 11' below the locking part 10, so that the buffer body I
, and a small hole 13' is provided extending from the tapered surface 21 of the conical body 11' to the bottom surface 12' of the conical body.

Further, in order to insert the gas-liquid displacement plate 8 into the annular protrusion 9 and engage it irremovably with the locking portion 10, the gas-liquid displacement plate 8 is provided with a vertical groove 22 to form a spring.

The material of the buffer I can be any plastic or metal.

Other shapes of the buffer include a locking part at the top, a gas-liquid displacement plate below it, a hemisphere or a cone below it, and a valve body opening into the pipe below. , a plate-shaped or cylindrical gas-liquid displacement material is provided to form a buffer body,
Even if the diameter is small, it is possible to quickly perform gas-liquid exchange between the inside of the pipe and the buffer chamber, and between the buffer chamber and the float chamber.

In addition, grooves and small holes are provided in the buffer body to reduce the flow of water flowing into the float chamber, but instead of providing grooves and small holes in the buffer body, the seat provided on the buffer chamber side of the annular projection It is also possible to reduce the flow of water that flows in forcefully by installing grooves or small holes that open and conduct in the float chamber.

As described above, according to the present invention, since the buffer is provided above the opening to the piping, the liquid will not flow into the float chamber with force, so the float will not oscillate.
Furthermore, the float can easily follow the water head surface, and there is no drainage during the exhaust from the exhaust port.

In addition, when the gas generated from the liquid in the pipe is filled with water and passes through the opening and accumulates in the buffer chamber, the gas and liquid in the float chamber are quickly and smoothly replaced by the gas-liquid displacement plate, and so-called air locks do not occur. It is.

Therefore, since it has such an effect, it is possible to provide an automatic air vent valve with a relatively large displacement that can be used with confidence even if it is installed on the top of a boiler or other electrical parts, as it does not eject water. be.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an automatic air vent valve according to the present invention, and FIG. 2 is an embodiment of a shock absorber. 1 is a valve cover, 2 is a valve body, 3 is a float chamber, 4 is a float,
5 is a buffer chamber, 6 is an opening, 7 is a buffer body, 9 is an annular projection, 10 is a locking portion, 15 is an exhaust port, 17 is a valve seat body, and 19 is an exhaust valve.

Claims (1)

[Scope of utility model registration request] An exhaust valve is installed on the top of the valve body, a float chamber containing a float is provided below it, and an opening that opens into the piping is provided below the exhaust valve.The float is connected to the exhaust valve by a lever, and the float is In an automatic air vent valve that opens and closes an exhaust valve by movement, a buffer chamber storing a buffer body is communicated with the lower part of the float chamber, and an opening opening into the pipe is provided below the buffer chamber, and the buffer body has one hemispherical end. A gas-liquid displacement plate is formed into a circular or conical shape, and the other is protruded from a spherical or circular center, and a locking portion is provided to form a guard, and the locking portion is allowed to enter the float chamber and then released. Automatic air vent valve that is impossible to play.