JP2510804Y2 - Float valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention utilizes a difference in specific gravity between a gas and a liquid to drive a valve means by a float that moves up and down together with a liquid surface to open a valve opening formed above the float. A float valve that opens and closes. This float valve can be applied to a ball tap for automatically supplying water to a predetermined position in a water storage tank, an exhaust valve for automatically discharging air mixed therein from a water piping system, and the like.

2. Description of the Related Art A conventional float valve has a casing that forms an inlet, a valve chamber, and an outlet, forms a valve opening in the upper part of the valve chamber, accommodates the float in the valve chamber, and has a float at one end and a valve opening at the other end. A lever having a valve body for opening and closing is attached to a valve chamber with a fulcrum near the valve body.

Problems to be Solved by the Present Invention The above is to increase the buoyancy of the float by the lever to act on the valve element, but the expansion ratio is about several times, and the valve cannot be closed completely and water leaks. There was a problem that caused.

Therefore, the technical problem of the present invention is to increase the expansion ratio and increase the valve closing force in the case where the buoyancy of the float is expanded by the lever to drive the valve element.

MEANS FOR SOLVING THE PROBLEM The technical means of the present invention taken to solve the above technical problems is to form an inlet, a valve chamber and an outlet with a casing,
In a case where a valve opening is formed in the upper part of the valve chamber, and a float and a valve body for opening and closing the valve opening are accommodated in the valve chamber, a lever formed in a V shape between the float and the valve body is bent. The portion is attached to the valve chamber so as to be rotatable about a fulcrum, and the valve is closed when the portion of the lever that abuts the valve body from the fulcrum becomes substantially parallel to the axis of the valve opening.

Action The action of the above technical means is as follows.

Since the lever is formed in a V shape, the axial displacement of the valve opening of the lever on the side contacting the valve body is small compared to the axial displacement of the valve opening on the side contacting the float. In addition, the valve closes when the lever that is in contact with the valve body is almost parallel to the axis of the valve opening, so the buoyancy of the float is greatly expanded and acts on the valve body more than the conventional one. , The valve closing force increases.

Further, the expansion ratio can be increased by increasing the length of the side of the lever that contacts the float and shortening the side that contacts the valve body.

Embodiment An embodiment showing a specific example of the above technical means will be described.

Example 1 (refer to FIG. 1 and FIG. 2) This is an initial rapid exhaust in which the air in the pipe at the beginning of water supply is rapidly exhausted, the valve is closed when the water comes out after the exhaust is completed, and the valve is kept closed thereafter. It is applied to valves. Incidentally, FIG. 1 shows the valve closed state and FIG. 2 shows the valve opened state.

The bottom cover 2 is joined to the main body 1 to form a valve casing, and the 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. Female threads for connecting pipes are formed at the inlet 4 and the outlet 5.

The guide cylinder 6 extends downward from the upper end of the valve chamber 3 to accommodate the valve body 7. A hole is formed in the inner wall between the outlet 5 and the guide cylinder 6 to form a valve port 8. An end of the inner wall on the side of the guide cylinder 6 is formed in a tapered shape to form a valve seat 9 on which the valve body 7 is seated. Guide tube 6
A plurality of through holes 10 are formed in the peripheral wall of the.

A cylindrical float 11 is housed below the valve body 7. Ribs 12 for guiding the float 11 in the vertical direction on the inner peripheral wall of the valve chamber 3.
Forming a plurality.

The V-shaped levers 13 and 14 between the valve body 7 and the float 11
It is attached to the main body 1 rotatably with the pins 15 and 16 as fulcrums. One ends of the levers 13 and 14 are in contact with the lower surface of the rounded valve body 7, and the other ends are in contact with the upper surface of the float 11. A plurality of small holes 17 are formed between the inlet 4 and the valve chamber 3 to prevent a shocking inflow.

At the beginning of water supply, as shown in FIG.
The valve body 7 is separated from the valve seat 9 and the valve opening 8 is opened. The initial air is discharged from the valve port 8 to the outlet 5 through the through hole 10 between the outer periphery of the float 11 and the inner peripheral wall of the valve chamber 3. When the exhaust of the initial air is completed and the liquid level in the valve chamber 3 rises, the float 11 floats with it. At this time, the float 11 moves the lever 13 clockwise to the lever 14
Rotate counterclockwise to ascend and lift lever 1
3, 14 lift up the valve element 7 and seat it on the valve seat 9 as shown in FIG. The position where the valve body 7 is seated on the valve seat 9 and closed is when the sides of the levers 13 and 14 contacting the valve body 7 are substantially parallel to the axis of the valve port 8.

Example 2 (See FIGS. 3 and 4) This is applied to a ball tap. Incidentally, FIG. 3 shows the valve closed state and FIG. 4 shows the valve opened state.

A bottom cover 32 is joined to the main body 31 to form a valve casing, and a valve chamber 33 is formed inside. An inlet 34 is formed in the upper part of the valve chamber 33 and an outlet 35 is formed in the lower part. Female threads for connecting pipes are formed at the inlet 34 and the outlet 35.

A guide cylinder (36) extends downward from the upper end of the valve chamber (33) to accommodate a valve body (37). Make a hole in the back wall between the entrance 34 and the guide tube 36 38
To form. An end of the inner wall on the side of the guide cylinder 36 is formed in a taper shape to form a valve seat 39 on which the valve body 37 is seated. A plurality of through holes 40 are formed in the peripheral wall of the guide cylinder 36.

A spherical float 41 is housed below the valve body 37. A disk-shaped receiving member 42 is placed on the upper surface of the float 41. A plurality of protrusions (43) prevent the receiving member (42) from falling off.

V-shaped levers 44 and 45 between the valve body 37 and the float 41 are rotatably attached to the main body 31 with pins 46 and 47 as fulcrums.
One ends of the levers 44 and 45 are in contact with the lower surface of the rounded valve body 37, and the other ends are in contact with the upper surface of the receiving member 42. Entrance 34
A plurality of small holes 48 are formed between the valve chamber 33 and the valve chamber 33.

When the liquid level is low, float 41
Is lowered, the valve element 37 is separated from the valve seat 39, and the valve opening 38 is opened. Water is supplied from the inlet 34 through the valve port 38 and the through hole 40. When the liquid level in the valve chamber 33 rises due to the water supply, the float 41 floats with it. At this time, the float 41 floats while rotating the lever 44 in the clockwise direction and the lever 45 in the counterclockwise direction, and the levers 44 and 45 move to the valve body 3
Lift up 7 and seat on valve seat 39 as shown in FIG. The position where the valve body 37 is seated on the valve seat 39 and closed is when the sides of the levers 44 and 45 contacting the valve body 37 are substantially parallel to the axis of the valve port 38.

Effect of the Invention The present invention has the following unique effects.

As described above, according to the present invention, since the buoyancy of the float is expanded and transmitted to the valve body by the lever formed in the V shape, the expansion ratio can be made very large and water leakage does not occur. Moreover, since the enlargement ratio is large, a small lever can be used, and the casing can be made small.

[Brief description of drawings]

FIG. 1 is a sectional view of a closed state of an initial rapid exhaust valve of an embodiment of the float valve of the present invention, FIG. 2 is a sectional view of the open state of FIG. 1, and FIG. 3 is a float valve of the present invention. FIG. 4 is a sectional view of the ball tap of the embodiment in a valve closed state, and FIG. 4 is a sectional view of the valve tapped state in FIG. 1,31: Main body, 2,32: Lid 3,33: Valve chamber, 4,34: Inlet 5,35: Outlet, 7,37: Valve body 8,38: Valve mouth, 11,41: Float 13, 14,44,45: Lever

Claims (1)

(57) [Scope of utility model registration request] 1. A casing forms an inlet, a valve chamber and an outlet,
In a case where a valve opening is formed in the upper part of the valve chamber, and a float and a valve body for opening and closing the valve opening are accommodated in the valve chamber, a lever formed in a V shape between the float and the valve body is bent. A float valve that is rotatably attached to the valve chamber, and is closed when the portion of the lever that contacts the valve body from the fulcrum is substantially parallel to the axis of the valve opening.