A vent valve for medium and high pressure gas compressors

Abstract

This utility model relates to a vent valve for a medium- and high-pressure gas compressor, comprising a valve body, a valve core within the valve body, and a valve cover on the valve core. The area of ​​the control end face of the valve core is larger than the area of ​​the sealing end face of the valve core, with a ratio of 10:1. A Y-ring with an upward opening and a Y-ring with a downward opening are provided between the valve core and the valve body. The valve core is in a normally open or normally closed state under the force of an elastic element. This utility model eliminates the need for a pressure reducing valve at the inlet, allowing direct connection to medium- and high-pressure media. The area of ​​the control end face of the valve core is significantly larger than the area of ​​the sealing end face, eliminating the need for a pressure reducing valve or a medium- and high-pressure medium at the control port. The opening and closing control of the medium- and high-pressure vent valve can be achieved using a lower gas source output from the compressor.

Description

Technical Field

[0001] This invention is applicable to medium- and high-pressure oil-injected or water-injected screw compressors, and in particular, a vent valve for medium- and high-pressure gas compressors. Background Technology

[0002] Currently, most vent valves used in medium- and high-pressure gas compressors are still atmospheric pressure (8-16 bar) vent valves. Pressure reducing valves are connected to the vent valve inlet and control chamber for protection. However, the addition of a pressure reducing valve at the vent valve inlet results in significant pressure loss as the medium passes through it and then back to the vent valve. Furthermore, the increased number of components and higher cost lead to numerous potential leaks, making it difficult to quickly locate the problem in case of a malfunction. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a vent valve for medium and high pressure gas compressors.

[0004] The purpose of this utility model is achieved through the following technical solution: a vent valve for a medium- and high-pressure gas compressor, comprising a valve body, a valve core disposed within the valve body, a valve cover disposed on the valve core, the area of ​​the control end face of the valve core being larger than the area of ​​the sealing end face of the valve core, the ratio of the area of ​​the control end face to the area of ​​the sealing end face of the valve core being 10:1, a Y-ring with an upward opening and a Y-ring with a downward opening being disposed between the valve core and the valve body, the valve core being in a normally open state or a normally closed state under the force of an elastic element, and an inlet and an outlet being disposed on the valve body.

[0005] A further improvement of this utility model is that an elastic element is provided between the valve core and the valve cover, at which time the valve is in a normally closed state.

[0006] A further improvement of this utility model is that an elastic element is fitted on the valve core, at which time the valve is in the normally open state.

[0007] A further improvement of this utility model is that: a control port is provided on the valve cover, a breather is provided on the valve body, and a silencer is provided on the breather.

[0008] A further improvement of this utility model is that: the valve body is provided with a control port, the valve cover is provided with a breather port, and the breather port is provided with a silencer.

[0009] A further improvement of this utility model is that multiple support rings are provided between the valve body and the valve core.

[0010] A further improvement of this utility model is that a sealing ring is provided between the valve body and the valve cover.

[0011] A further improvement of this utility model is that a sealing gasket is provided between the bottom of the valve body and the valve core.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] 1. This utility model does not require a pressure reducing valve at the inlet and can be directly connected to medium and high pressure media;

[0014] 2. The area of ​​the control end face of the valve core is much larger than the area of ​​the sealing end face of the valve core. The control port does not need to be connected to a pressure reducing valve, nor does it need to be connected to medium and high pressure medium. The opening and closing control of the medium and high pressure vent valve can be achieved by using a lower air source output from the compressor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a structure where the elastic element is on the valve core and the breather is on the valve body.

[0016] Figure 2 This is a schematic diagram of a structure with an elastic element between the valve core and the valve cover, and the breather port on the valve body.

[0017] Figure 3 This is a schematic diagram of a structure with an elastic element between the valve core and the valve cover, and the breather port on the valve cover.

[0018] The numbers in the diagram are: 1-valve body, 2-valve core, 2-1-control end face, 2-2-sealing end face, 3-valve cover, 4-Y-ring with opening upward, 5-Y-ring with opening downward, 6-elastic element, 7-control port, 8-breathing port, 9-silencer, 10-support ring, 11-sealing ring, 12-sealing gasket, 13-inlet, 14-outlet. Detailed Implementation

[0019] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0020] like Figure 1 This invention illustrates a specific embodiment of a vent valve for a medium- and high-pressure gas compressor: It includes a valve body 1 with an inlet 13 and an outlet 14. A valve core 2 is located inside the valve body 1, and a valve cover 3 is mounted on the valve core 2. The area of ​​the control end face 2-1 of the valve core 2 is larger than the area of ​​the sealing end face 2-2 of the valve core, with a ratio of 10:1 between the area of ​​the control end face 2-1 and the area of ​​the sealing end face 2-2 of the valve core. An upward-opening Y-ring 4 and a downward-opening Y-ring 5 are provided between the valve core 2 and the valve body 1. An elastic element 6 is fitted onto the valve core 2, at which point the valve is normally open. A control port 7 is provided on the valve body 3, and a breather 8 is provided on the valve cover 1. A silencer 9 is mounted on the breather 8.

[0021] like Figure 2As shown, a vent valve for a medium- and high-pressure gas compressor includes a valve body 1 with an inlet 13 and an outlet 14. A valve core 2 is located inside the valve body 1, and a valve cover 3 is located on the valve core 2. The area of ​​the control end face 2-1 of the valve core 2 is larger than the area of ​​the sealing end face 2-2 of the valve core, and the ratio of the area of ​​the control end face 2-1 to the area of ​​the sealing end face 2-2 of the valve core is 10:1. A Y-ring 4 with an upward opening and a Y-ring 5 with a downward opening are provided between the valve core 2 and the valve body 1. An elastic element 6 is provided between the valve core 2 and the valve cover 3. At this time, the valve is in a normally closed state. A control port 7 is provided on the valve cover 3, and a breather 8 is provided on the valve body 1. A silencer 9 is provided on the breather 8.

[0022] like Figure 3 As shown, a vent valve for a medium- and high-pressure gas compressor includes a valve body 1 with an inlet 13 and an outlet 14. A valve core 2 is located inside the valve body 1, and a valve cover 3 is located on the valve core 2. The area of ​​the control end face 2-1 of the valve core 2 is larger than the area of ​​the sealing end face 2-2 of the valve core. The ratio of the area of ​​the control end face 2-1 to the area of ​​the sealing end face 2-2 of the valve core is 10:1. A Y-ring 4 with an upward opening and a Y-ring 5 with a downward opening are provided between the valve core 2 and the valve body 1. An elastic element 6 is provided between the valve core 2 and the valve cover 3. At this time, the valve is in a normally closed state. A control port 7 is provided on the valve body 3, and a breather 8 is provided on the valve cover 1. A silencer 9 is provided on the breather 8.

[0023] Multiple support rings 10 are provided between the valve body 1 and the valve core 2. A sealing ring 11 is provided between the valve body 1 and the valve cover 3. A sealing gasket 12 is provided between the bottom of the valve body 1 and the valve core 2.

[0024] The applicant further declares that while the above embodiments illustrate the implementation method and apparatus structure of this utility model, this utility model is not limited to the above-described embodiments, meaning that this utility model must rely on the above methods and structures to be implemented. Those skilled in the art should understand that any improvements to this utility model, equivalent substitutions for the selected implementation methods, additions of steps, and selection of specific methods all fall within the protection and disclosure scope of this utility model.

[0025] This utility model is not limited to the above-described embodiments. All methods that use similar structures and methods to achieve the purpose of this utility model are within the protection scope of this utility model.

Claims

1. A vent valve for a medium-high pressure gas compressor comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve core (2), and the valve core (2) is provided with a valve cover (3). The area of ​​the control end face (2-1) of the valve core (2) is greater than the area of ​​the sealing end face (2-2) of the valve core. The ratio of the area of ​​the control end face (2-1) to the area of ​​the sealing end face (2-2) of the valve core is 10:

1. A Y-ring (4) with an upward opening and a Y-ring (5) with a downward opening are provided between the valve core (2) and the valve body (1). The valve core (2) is in a normally open state or a normally closed state under the force of the elastic element (6). The valve body (1) is provided with an inlet (13) and an outlet (14).

2. The vent valve for a medium- and high-pressure gas compressor according to claim 1, characterized in that: An elastic element (6) is provided between the valve core (2) and the valve cover (3), at which time the valve is normally closed.

3. The vent valve for a medium- and high-pressure gas compressor according to claim 1, characterized in that: The valve core (2) is fitted with an elastic element (6), and the valve is normally open at this time.

4. The vent valve for a medium- and high-pressure gas compressor according to claim 1, characterized in that: The valve cover (3) is provided with a control port (7), the valve body (1) is provided with a breather (8), and the breather (8) is provided with a silencer (9).

5. The vent valve for a medium- and high-pressure gas compressor according to claim 1, characterized in that: The valve body (3) is provided with a control port (7), the valve cover (1) is provided with a breather (8), and the breather (8) is provided with a silencer (9).

6. The vent valve for a medium- and high-pressure gas compressor according to claim 1, characterized in that: Multiple support rings (10) are provided between the valve body (1) and the valve core (2).

7. The vent valve for a medium- and high-pressure gas compressor according to claim 1, characterized in that: A sealing ring (11) is provided between the valve body (1) and the valve cover (3).

8. The vent valve for a medium- and high-pressure gas compressor according to claim 1, characterized in that: A sealing gasket (12) is provided between the bottom of the valve body (1) and the valve core (2).

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