JP2001295989A - Spring energized disc freeze proofing valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spring energized disc freeze proofing valve for preventing the application of unreasonable force on a spring and allowing a disc valve element to fully open an annular valve seat. SOLUTION: An inlet 4, an outlet 5 and an annular valve seat 6 are formed coaxially by a valve casing consisting of an inlet member 1 and an outlet member 2. The disc valve element 7 is arranged at the side of the inlet 4 of the annular valve seat 6. A spring support 9 with a plurality of open communication holes 8 is formed on the outlet member 2. The spring support 9 is inclined gradually more to the annular valve seat 6 as tending to a lower side and it is spaced gradually narrower from the annular valve seat 6 as tending to the lower side. A coil spring 10 which is compressed gradually more as tending to the lower side is arranged between the disc valve element 7 and the spring support 9 for energizing the disc valve element 7 to the opening direction. Four ribs 12, 13 each are provided on the inner periphery wall of the inlet member 1. The inner ends of the ribs 12, 13 are all located on a concentric circle and at an equal distance from the axial center of an access. The diameter of the inner face of the rib 12 is formed smaller than the diameter of the disc valve element 7 and the diameter of the inner face of the rib 13 is formed somewhat larger than the diameter of the disc valve element 7. The inner face of the rib 13 forms a slide contact guide face of the disc valve element 7 and a gap to the rib 13 serves for passing a fluid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifreezing valve, and more particularly, to a valve that automatically opens when a steam-using device is shut down, for example, a steam-using device and associated piping, traps, valves and the like. More particularly, the present invention relates to a spring-biased disk type anti-freezing valve in which a disk-shaped valve body is urged in a valve opening direction by a spring.

[0002]

2. Description of the Related Art An example of a spring-loaded disk type antifreeze valve is disclosed in Japanese Utility Model Publication No. 61-14800. In this method, an inlet and an outlet are formed in a valve casing, an annular valve seat is provided between the inlet and the outlet, a disc-shaped valve body is arranged on the inlet side of the annular valve seat, and a spring receiver is provided on an outlet side of the disc-shaped valve body. And a spring is disposed between the disc-shaped valve body and the spring receiver to bias the disc-shaped valve body in the valve opening direction.

In this anti-freezing valve, the fluid pressure on the inlet side communicating with the application system exerts a force in the valve closing direction on the disc-shaped valve body, and the elastic force of the spring exerts a force in the valve opening direction on the disc-shaped valve body. . When the fluid pressure on the inlet side exceeds a predetermined value, the disc-shaped valve body is seated on the annular valve seat by the fluid pressure on the inlet side, and when the fluid pressure falls below the predetermined value, it is separated from the annular valve seat by the elastic force of the spring.

[0004]

In the above-mentioned prior art spring-loaded disk type antifreezing valve, since the disk-shaped valve element must be supported by a spring so as not to be displaced downward by its own weight, an excessive force is applied to the spring. And the spring is easily broken. Further, when the disc-shaped valve body is displaced downward and its outer peripheral lower end abuts against the lower end of the inner peripheral wall of the valve casing, sliding resistance increases, so that only the upper side of the disc-shaped valve body is separated from the annular valve seat. There has been a problem that the operator falls into a semi-open state in which the user cannot sit down on the lower side and cannot discharge the fluid on the lower side.

The present invention focuses on the above-mentioned problems of the prior art, and can prevent an excessive force from being applied to a spring.
It is a technical object of the present invention to provide a spring-loaded disk type anti-freezing valve in which a disk-shaped valve element can fully open an annular valve seat.

[0006]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is to form an inlet and an outlet in a valve casing and provide an annular valve seat between the inlet and the outlet. , A disc-shaped valve body is disposed on the inlet side of the annular valve seat, a spring receiver is provided on the outlet side of the disc-shaped valve body, and the disc-shaped valve body is urged between the disc-shaped valve bodies in the valve opening direction. The outer periphery of the disc-shaped valve body is slidably guided by the inner peripheral wall of the valve casing, and an empty space for fluid passage is formed between the outer periphery of the disc-shaped valve body and the inner peripheral wall of the valve casing. The spring-loaded disk-type antifreeze valve is characterized in that the spring receiver is provided so as to be inclined toward the annular valve seat toward the lower side, and the spring is compressed between the disk-shaped valve body and the spring receiver toward the lower side. is there.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In a spring-loaded disk type antifreezing valve according to the present invention, as in the prior art, the fluid pressure on the inlet side communicating with the application system exerts a force in the valve closing direction on the disk-shaped valve body,
The elastic force of the spring exerts a force on the disc-shaped valve body in the valve opening direction. When the fluid pressure on the inlet side exceeds a predetermined value, the disc-shaped valve body is seated on the annular valve seat by the fluid pressure on the inlet side, and when the fluid pressure falls below the predetermined value, it is separated from the annular valve seat by the elastic force of the spring.

In the spring-loaded disk type antifreezing valve of the present invention, the outer periphery of the disk-shaped valve body is slidably guided by the inner peripheral wall of the valve casing, and the outer periphery of the disk-shaped valve body and the inner peripheral wall of the valve casing are formed. Forming an empty space for fluid passage between them,
The lower portion of the spring receiver is provided so as to be inclined toward the annular valve seat, and the lower portion of the spring is arranged between the disk-shaped valve body and the spring receiver so as to be compressed. Therefore, the outer periphery of the disc-shaped valve body is slidably guided by the inner peripheral wall of the valve casing, and it is possible to prevent an excessive force from being applied to the spring. Further, the disc-shaped valve element is urged strongly in the valve opening direction by the lower part of the spring, so that the annular valve seat can be fully opened.

[0009]

An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The valve casing is formed by screwing the inlet side member 1 and the outlet side member 2 together, and forms a substantially cylindrical valve chamber 3 inside. An inlet 4 is formed in the inlet member 1 and an outlet 5 is formed in the outlet member 2. The inlet 4 and the outlet 5 are formed on the same axis.

An annular valve seat 6 is formed at the opening end of the outlet side member 2 on the valve chamber 3 side. The annular valve seat 6 is formed on the same axis as the inlet 4 and the outlet 5. The disk-shaped valve element 7 is arranged on the inlet 4 side of the annular valve seat 6. A spring receiver 9 having a plurality of communication holes 8 formed in the outlet side member 2 is formed. The lower portion of the spring receiver 9 is inclined toward the annular valve seat 6 toward the lower side, and the space between the spring seat 9 and the annular valve seat 6 becomes narrower downward. A coil-shaped spring 10 for urging the disk-shaped valve element 7 in the valve opening direction is arranged between the disk-shaped valve element 7 and the spring receiver 9 in such a manner that the coil-shaped spring 10 is compressed to the lower part.

[0011] Four ribs 12 and 13 are provided on the inner peripheral wall of the inlet side member 1 respectively. The inner ends of the ribs 12 and 13 are all located on concentric circles and are formed equidistant from the axis of the entrance. The diameter of the inner surface of the rib 12 is formed smaller than the diameter of the disc-shaped valve body 7, and the diameter of the inner surface of the rib 13 is formed slightly larger than the diameter of the disc-shaped valve body 7. The inner surface of the rib 13 forms a sliding contact guide surface of the disk-shaped valve body 7, the space between the ribs 13 functions to allow the fluid to pass, and the step between the ribs 12 and 13 forms the disk-shaped valve. It serves to hold the body 7 in the fully open position.

In the spring-loaded disk type antifreezing valve of the above embodiment, the fluid pressure on the inlet 4 side communicating with the application system exerts a force in the valve closing direction on the disk-shaped valve body 7 and the elastic force of the spring 10 A force in the valve opening direction is applied to the valve body 7. When the fluid pressure on the inlet 4 side becomes equal to or less than a predetermined value, the disc-shaped valve body 7 is displaced in the valve opening direction by the elastic force of the spring 10 and separates from the annular valve seat 6. Thereby, the fluid at the inlet 4 flows to the outlet 5. At this time, since the outer periphery of the disc-shaped valve element 7 is slidably guided by the inner surface of the rib 13, it is possible to prevent an excessive force from being applied to the spring 10. Further, since the disc-shaped valve element 7 is urged strongly in the valve opening direction by the spring 10 as its lower portion, the disc-shaped valve element 7 can fully open the annular valve seat 6. When the fluid pressure on the inlet 4 side exceeds a predetermined value, the disc-shaped valve element 7 is displaced in the valve closing direction while compressing the spring 10 by the fluid pressure on the inlet 4 side, and seats on the annular valve seat 6. Thereby, the inlet 4 and the outlet 5 are shut off.

In the above embodiment, the rib is provided on the inner peripheral wall of the valve casing and the outer periphery of the disc-shaped valve body is slid on the inner surface of the rib. By providing a projection on the outer periphery of the valve body and sliding the outer end of the projection on the inner peripheral wall of the valve casing, the outer periphery of the disc-shaped valve body is slidably guided by the inner peripheral wall of the valve casing and the outer periphery of the disc-shaped valve body is also provided. An empty space for fluid passage may be formed between the valve and the inner peripheral wall of the valve casing.

[0014]

As described above, the spring-biased disk type antifreeze valve according to the present invention has a disk-shaped valve body which is slidably guided by the valve casing and is arranged so that the spring is compressed to the lower part, so that the spring cannot be easily pressed. Since no excessive force is applied, breakage of the spring can be eliminated, and the annular valve seat can be fully opened, so that there is an excellent effect that fluid does not accumulate on the lower side.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of a spring-loaded disk type antifreeze valve according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inlet side member 2 Outlet side member 3 Valve room 4 Inlet 5 Outlet 6 Annular valve seat 7 Disc-shaped valve element 8 Communication hole 9 Spring receiver 10 Spring 12 Rib 13 Rib

Claims (1)

[Claims] An inlet and an outlet are formed in a valve casing, an annular valve seat is provided between the inlet and the outlet, a disc-shaped valve body is disposed on the inlet side of the annular valve seat, and an outlet side of the disc-shaped valve body is provided on the outlet side. A spring support is provided, and a spring for urging the disc-shaped valve body in the valve opening direction is disposed between the disc-shaped valve body and the spring receiver. The outer periphery of the disc-shaped valve body is slidably guided by the inner peripheral wall of the valve casing. In addition, an empty space for fluid passage is formed between the outer periphery of the disc-shaped valve body and the inner peripheral wall of the valve casing. A spring-loaded disk-type antifreezing valve, wherein a spring is arranged so as to be compressed to a lower portion between the springs.