JPH0830542B2 - Float valve with vibration rectifying plate - Google Patents

Description

TECHNICAL FIELD The present invention relates to a float valve which is preferably used as a control device for maintaining a constant water level, such as a pressure regulating tank, a farm pond and a water diversion tank. In particular, the present invention relates to a technique for surely preventing the vibration of the main valve body and the generation of abnormal noise due to the vibration even when the fluid flows into the valve box at a high speed of a certain level or higher.

[Prior Art] Conventionally, for example, a float valve which has been used as a control device for maintaining a constant water level, such as a pressure control tank, a farm pond, and a diversion tub, is generally configured as shown in FIG. There is.

That is, in the float valve, the fluid outlet 2A is formed at the lower end in the vertical axis C1 direction of the valve box 2 whose top is closed by the top cover 1, and the fluid inlet 2B is formed at the one end (the left end in the drawing) in the horizontal axis C2 direction. In addition, the vertical axis C1 is attached to the cylinder 3 of the upper and lower open ends which is mounted in the valve box 2 concentrically with the vertical axis C1 of the valve box 2.
The main valve body 4 is fitted so as to be reciprocally movable in any direction.

A sub-valve seat 4A is formed on the vertical axis C1 at the lower end of the main valve body 4, and the sub-valve body 5 opens and closes the sub-valve seat 4A by contacting and separating from the sub-valve seat 4A.
Is fixed to the lower end of the valve rod 6. And the valve rod 6
Is attached to the inside of the main valve body 4 and the vertical axis C1 is attached to the valve stem support 7.
It is supported so as to be reciprocally movable in any direction, and its upper end is connected to the float 9 via the operating arm 8.

Therefore, when the water level is at the level of WL1 or higher, the sub-valve body 5 is in close contact with the sub-valve seat 4A, and the main valve body 4 is formed at the upper end of the fluid outlet 2A. seat)
The valve is in close contact with 10.

The water level drops to the level of WL2, and the float 9 descends to the position indicated by the alternate long and short dash line Y1, whereby the valve rod 6 rises to the position where the upper end surface of the stopper 11 contacts the lower end surface of the cylinder 3. The valve body 5 is opened, the water level drops to the level of WL3, and the float 9 rises to the main valve body 4 via the stopper 11 and the valve stem support 7 in the process of descending to the position shown by the chain double-dashed line Y2. Then, the valve is opened, and the fluid flowing from the fluid inlet 2B is guided to the fluid outlet 2A.

On the other hand, when the water level rises from the level of WL3 to the level of WL2, the sub valve body 5 is closed, and when the water level rises to the level of WL1, the main valve body 4 is closed and the valve is fully closed. .

[Problems to be Solved by the Invention] In the conventional float valve, when the main valve body 4 is opened and opened, the fluid flowing from the fluid inlet 2B into the valve box 2 along the horizontal axis C2 is immediately after the inflow. After colliding with the main valve body 4, the direction is changed to the vertical axis C1 and flows out from the fluid outlet 2A.

As described above, in the configuration in which the fluid flowing into the valve box 2 from the fluid inlet 2B collides with the main valve body 4 immediately after the inflow, the impact at the time of collision and the turbulence of the fluid caused by the direction change are delicately different from each other. When the flow rates of the fluids flowing into the valve box 2 reach each other at a certain level due to the influence of each other, a phenomenon occurs in which vibration occurs in the main valve body 4 and abnormal noise is generated due to the vibration.

Therefore, it is impossible to increase the flow velocity to a certain level or higher to allow a large flow rate of fluid to flow in from the fluid inlet 2B having a small diameter, and there is a problem of poor usability.

The present invention has been made in view of such circumstances, and even if a fluid is allowed to flow into a valve box at a high speed of a certain level or higher,
Float with anti-vibration rectifier plate that reliably prevents vibration of the main valve body and abnormal noise accompanying this vibration, allows a large flow rate of fluid to flow in from a fluid inlet with a small diameter, and improves usability The purpose is to provide a valve.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a fluid outlet at the lower end in the vertical axis direction of a valve box, and a fluid inlet at one end in the horizontal axis direction, In a float valve in which a cylindrical main valve body that opens and closes by contacting with and separating from a valve box seat formed in the fluid outlet by reciprocating movement in the vertical axis direction is stored in a valve box, a fluid inlet of the main valve body Opposite to the outer surface directed to the side, avoiding collision between at least most of the flow of the fluid from the fluid inlet to the fluid outlet and the outer surface of the main valve body,
A straightening plate for guiding the fluid to the fluid outlet is provided.

[Operation] According to the present invention, the flow regulating plate avoids the collision between at least most of the flow of the fluid from the fluid inlet to the fluid outlet and the outer surface of the main valve body facing the fluid inlet side.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a half-vertical longitudinal sectional view showing an embodiment of a vibration preventing flow regulating plate-equipped float valve according to the present invention, and FIG. 2 is a transverse sectional view taken along the line II-II in FIG. Note that the features of the present invention relate to the fluid rectification structure, and other members and the configuration other than this are the same as those of the conventional example.
In the figure, parts corresponding to those in FIG. 4 are designated by the same reference numerals, and detailed description thereof will be omitted.

1 and 2, the fluid inlet 2B of the main valve body 4
Outer surface 4B directed toward the side, that is, the outer surface of the main valve body 4 exposed below the cylinder 3 and directed toward the fluid inlet 2B side
A rectifying plate 12 is provided so as to face 4B.

That is, the straightening vane 12 is made of a so-called punching metal, which is a metal plate member having a large number of small holes 12a, ...
It is mounted on the outer periphery of the valve box seat 10 via a bracket 13 so as to face the 4B and the lower portion of the cylinder 3 at a position relatively close thereto.

With such a configuration, the fluid (arrow A1) flowing from the fluid inlet 2B when the main valve body 4 is opened collides with the straightening vane 12,
Most of the flow is rectified into the flow indicated by arrow a1 and guided to a substantially annular passage 14 formed by the inner circumference of the valve box 2 and the outer circumference of the cylinder 3 and the main valve body 4, from which it is indicated by arrow A2. So that it is led out through the fluid outlet 2A.

On the other hand, in the fluid (arrow A1) flowing in from the fluid inlet 2B, a part of the fluid corresponding to the small holes 12, ..., Of the straightening plate 12 is reduced by the orifice effect of the small holes 12a ,. After that, it collides with the outer surface 4B of the main valve body 4 by a low pressure flow as shown by an arrow a2, and is then discharged through the fluid outlet 2A as shown by an arrow A2.

As described above, the flow rectifying plate 12 avoids the collision of the majority of the flow of the fluid from the fluid inlet 2B to the fluid outlet 2A and the outer surface 4B that faces the fluid inlet side of the main valve body 4, and Since only a part of the depressurized fluid passes through the small holes 12a, ..., And collides, even if the fluid flows into the valve box 2 at a high speed above a certain level, the main valve body It is possible to reliably prevent the generation of the vibration and the abnormal noise accompanying the vibration. Therefore, a large amount of fluid can be made to flow in from the fluid inlet 2B having a small diameter, which improves usability.

In the above embodiment, a large number of small holes 12a, ...
A straightening plate 12 made of a metal plate material bent in an arc shape in cross section.
However, the present invention is not limited to the above-mentioned embodiment, and a small hole as shown in FIG.
The straightening plate 12 is formed by a metal plate material on which 12a is not formed.
May be configured.

[Advantages of the Invention] Since the present invention is configured as described above, it has the effects described below.

That is, since the collision of at least most of the flow of the fluid from the fluid inlet to the fluid outlet and the outer surface of the main valve body facing the fluid inlet side is avoided by the flow straightening plate, the fluid is kept above a certain level. Even if the main valve body is made to flow into the valve box at a high speed, it is possible to reliably prevent the vibration of the main valve body and the abnormal noise accompanying the vibration. .

Therefore, it is possible to increase the flow velocity to a certain level or higher and allow a large amount of fluid to flow in from a fluid inlet having a small diameter, so that usability can be improved.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a half-vertical longitudinal sectional view, FIG. 2 is a cross-sectional plan view taken along the line II-II in FIG. 1, and FIG. FIG. 4 is a cross-sectional plan view showing a modified example, and FIG. 4 is a half-vertical longitudinal sectional view of a conventional example. 2 …… Valve case 2A …… Fluid outlet 2B …… Fluid inlet 4 …… Main valve body 4B …… Fluid inlet side oriented outer surface 10 …… Valve box seat 12 …… Rectifying plate

Claims (1)

[Claims] 1. A fluid outlet is formed at the lower end of the valve box in the vertical axis direction, and a fluid inlet is formed at the one end in the horizontal axis,
In a float valve in which a cylindrical main valve body that opens and closes by contacting with and separating from a valve box seat formed in the fluid outlet by reciprocating movement in the vertical axis direction is stored in a valve box, a fluid inlet of the main valve body A straightening vane facing the outer surface directed to the side, avoiding a collision between at least most of the flow of the fluid from the fluid inlet to the fluid outlet and the outer surface of the main valve body, and guiding the fluid to the fluid outlet. A float valve with a rectifying plate for vibration prevention, which is provided.