Patent Application
20180363791
The present invention relates to a pressure releasing assembly, and more particularly to a pressure releasing assembly for a pressure valve that immediately exhausts excessively high pressure.
Pressure valves are used to reduce the input pneumatic pressure to a desired output pneumatic pressure and are used widely in various devices. A piston is mounted movably between the inlet and the outlet to selectively stop the gas flow from a pressure gas source to a downstream device. However, when the conventional pressure valve is suffering from excessively high air pressure, the inner component of the conventional pressure valve is pushed by the excessively high air pressure causing damage.
To overcome the shortcomings, the present invention provides a pressure releasing assembly for a pressure valve to mitigate or obviate the aforementioned problems.
The main objective of the present invention is to provide a pressure releasing assembly for a pressure valve to rapidly reduce the excessively high air pressure. The pressure releasing assembly has a hollow shell with a gap formed through an end and a main notch formed therein and communicating with the gap. A slide is mounted slidably in the shell and an airproof element mounted between the inner wall of the shell and the slide to keep the air from leaking through the space between the slide and the inner wall of the shell. When the slide is moved rapidly due to excessively high air pressure, the airproof element is moved along with the slide and then is received in the main notch. Then a space is caused between the wall of the main notch and the airproof element to allow the gas to leak out from the gap. Therefore, the air pressure is reduced rapidly to keep the component from being damaged.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
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The airproof element 40 is mounted between the inner wall of the shell and the slide 30, is attached to the slide 30 and is selectively received in the main notch 12. In one embodiment, the airproof element 40 is an O-ring and is mounted in the annular recess 31 of the slide 30.
The resilient element 50 is mounted in the shell 10 and is clamped between the slide 30 and the outlet end 102 of the shell 10. In one embodiment, the slide 30 has an axial recess 32 to receive the resilient element 50. In one embodiment, the shell 10 has an inner bump 14 and one end of the resilient element 50 is mounted around the inner bump 14 to hold the resilient element 50 linearly. In one embodiment, the resilient element is a spring.
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When the air pressure in the pressure valve decreases to the predetermined pressure, the resilient element 50 pushes the slide 30 back to the normal position.
With the gap 11, the main notch 12, the slide 30 and the airproof element 40 to form a pressure releasing assembly, the excessively high air pressure is easily relieved by leaking gas through the main notch 12. Therefore, the pressure valve as described does not harm by the excessively high air pressure.
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
