JPH0547331Y2 - - 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.
This invention relates to an improvement in an initial rapid exhaust valve that rapidly exhausts the air in the piping at the beginning of water supply and maintains the valve closed once the exhaust is finished.

There is a so-called automatic exhaust valve that closes when water comes to the exhaust valve and exhausts air whenever it accumulates, and a so-called automatic exhaust valve that quickly exhausts the initial air, closes when water arrives after exhausting, and then There is a so-called initial rapid exhaust valve that remains closed.

The function required of the initial rapid exhaust valve is to exhaust the air in the initial piping in a short period of time, and to be able to quickly and reliably close the valve when cold or hot water arrives, without leaving any air remaining in the piping. .

Conventional technology The conventional technology for automatic exhaust valves is
There is one shown in Publication No. 8807. This has a casing that forms a valve chamber inside, an inlet on the central axis at the bottom of the valve chamber, a valve seat with a valve opening leading to the outlet on the upper side, and a spherical float inside the valve chamber. It is arranged in a free state so that the valve port can be opened and closed directly on its outer surface.

The reason why the valve port is formed on the upper side of the valve chamber is to enable opening and closing of the large valve port.

Applicants have improved on this technology to develop an initial rapid exhaust valve. That is, in the above,
The valve diameter has been increased so that it can be applied to an initial rapid exhaust valve.

In this case, there is a problem that the valve closes before the air is completely exhausted. This is because the float is blown up by the force of air flowing into the valve chamber from the inlet.

A solution to the above problem is disclosed in Japanese Utility Model Publication No. 15717/1983. This is done by making the inlet eccentric from the central axis of the valve chamber toward the valve port side, and creating a vertical hole on the inlet side of the valve chamber through which fluid flows upward and a horizontal hole through which fluid flows laterally. A sloped surface is formed inside the room so that it becomes lower as it goes away from the valve opening.
By retracting the float from the path from the vertical hole to the valve chamber along an inclined surface, the float is prevented from being blown up by the force of the air flowing in from the vertical hole.

Problems to be Solved by the Present Invention However, in this device, since the opening area of the vertical hole is the same as the opening area of the inlet, and since no float is positioned above the vertical hole, the air After exhaustion is complete, most of the water goes straight from the vertical hole to the valve port. Since this straight water does not act as a force to push up the float, there is a problem in that the floating of the float is delayed and water leaks.

Therefore, the technical problem of this invention is to prevent the float from being blown up by the force of air flowing into the valve chamber from the inlet, and to prevent the float from being blown up by the force of the air flowing into the valve chamber from the inlet. is to obtain an exhaust valve.

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 upper side. In a valve seat with an open valve opening leading to the valve chamber, a spherical float is placed freely inside the valve chamber, and the valve opening is opened and closed directly on the outer surface of the float. A control member that controls the flow of fluid from the inlet is arranged at the bottom of the valve chamber, and a vertical hole that allows fluid to flow upward and a horizontal hole that allows fluid to flow laterally. A hole is opened, and the opening area of the vertical hole and the horizontal hole is formed to be smaller than the opening area of the inlet, respectively, and the total opening area of the vertical hole and the horizontal hole is set to a desired size so as to function as an initial rapid exhaust valve. The upper surface of the control member is formed into an inclined surface that becomes lower as it goes away from the valve port, and the side of the outer periphery of the float on the valve port side is positioned above the vertical hole to prevent it from being pushed up by the air flow. It is something that has been forced upon me.

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

The vertical hole formed in the control member acts as a force for the inflow fluid to push up the float, and the horizontal hole acts to introduce the fluid into the valve chamber without directly hitting the float. The total opening area of the vertical holes and horizontal holes has a desired size so as to function as an initial rapid exhaust valve.

Since the opening areas of the vertical hole and the horizontal hole are each smaller than the opening area of the inlet, the inflow fluid flows into the valve chamber through the vertical hole and the horizontal hole in a dispersed manner. The air flowing in through the vertical hole acts as a force pushing up the float, but the amount of air flowing in through the vertical hole is small, and air has a lower specific weight than water, so the float will be pushed up and the valve will close. There is no.

Once the air has been expelled and water flows in, the float rises along with the liquid level. At this time, most of the water flowing in from the vertical hole hits the side of the outer periphery of the float on the valve port side, and does not go straight to the valve port. Also,
Water has a higher specific weight than air, so it has a greater force pushing the float up. Therefore, the float can float quickly and reliably to close the valve port and keep the valve closed, and water leakage does not occur.

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

As described above, according to the present invention, the initial air can be exhausted in a short time, and when water comes, the valve can be closed quickly and reliably.

Since an inclined surface is formed on the upper surface of the control member,
When the valve is opened, the float is positioned in contact with the inclined surface and the side surface of the casing, and is less likely to be moved by the airflow.

Since the control member only needs to be placed at the lower part of the valve chamber, the shape is compact and the valve itself does not become large.

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 3, and a valve chamber 4 is formed inside. An inlet 5 is formed in the lower part of the valve chamber 4, and an outlet 6 is formed in the upper part. Entrance 5
The outlet 6 is formed with a female thread for connecting to a pipe.

The valve seat 7 is screwed to the lid 2. Valve seat 7 is valve chamber 4
It is located on the upper side of the. A valve port 8 is opened in the valve seat 7 to communicate the valve chamber and the outlet 6. The inlet 5 and outlet 6 are eccentric from the center axis of the valve chamber 4 toward the valve port 8 side.

A hollow spherical float 9 is placed in the valve chamber 4 in a free state. The float 9 directly opens and closes the valve port 8 with its outer surface. Two float seats 10 are formed on the lid 2.

The control member 11 is press-fitted into the end of the inlet 5 on the side of the valve chamber 4 and fixed. The control member 11 has a cylindrical shape and its upper end is closed by an upper wall. A vertical hole 12 is drilled through the upper wall. The vertical hole 12 is located on the same plane as the valve port 8,
It is opened eccentrically on the valve port 8 side of the upper wall. A transverse hole 13 is drilled in the side wall of the control member. There are four horizontal holes 13,
They are formed radially at positions inclined at 45 degrees from the vertical hole 12. The central axis of the horizontal hole 13 is approximately the same as the height of the upper surface of the bottom wall of the valve chamber 4. Valve port 8 is located on the top surface of the upper wall.
An inclined surface 14 is formed so as to become lower as it goes away from the surface. The float 9 is stable at the position shown by the two-dot chain line when the valve is opened.

In the above embodiment, four horizontal holes are formed, but the number of horizontal holes is not limited to this, and desired effects can be obtained as long as the horizontal holes are formed at least on the side opposite to the valve port from the central axis of the control member. Further, although the vertical hole is opened eccentrically toward the valve port side, substantially the same effect as in the above embodiment can be obtained even if the vertical hole is opened on the central axis.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an initial rapid exhaust valve according to an embodiment of the present invention. 4... Valve chamber, 5... Inlet, 6... Outlet, 7...
Valve seat, 8...Valve port, 9...Float, 11...Control member, 12...Vertical hole, 13...Horizontal hole, 14...
Slope.

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 valve seat is formed at the upper side with a valve port leading to an outlet, and a spherical float is arranged in a free state within the valve chamber. In a device that opens and closes the valve port directly on its outer surface, the inlet is formed eccentrically from the center axis of the valve chamber toward the valve port, and a control member is provided at the bottom of the valve chamber to control the flow of fluid from the inlet. A vertical hole through which the fluid flows upward and a horizontal hole through which the fluid flows horizontally are formed in the control member, and the opening areas of the vertical hole and the horizontal hole are each formed smaller than the opening area of the inlet, and The total opening area of the and horizontal holes is formed to a desired size so as to function as an initial rapid exhaust valve,
The upper surface of the control member is formed into an inclined surface that becomes lower as it goes away from the valve port, and the side of the outer periphery of the float on the valve port side is positioned above the vertical hole to prevent it from being pushed up by the air flow. Rapid exhaust valve.