Intake and exhaust valve for natural gas compressor

Abstract

The utility model discloses an intake and exhaust valve for a natural gas compressor, and particularly relates to the field of valves, which comprises a valve body, a valve core arranged in the middle of the valve body, an end cover arranged at one end of the valve core, a first connecting groove arranged at one end of an inner cavity of the valve body, a gas cavity arranged at the other end of the inner cavity of the valve body, and exhaust holes arranged on the periphery of the inner cavity of the gas cavity. A limiting groove is formed in the side, close to the end cover, of the valve element. Firstly, one end of the valve body is blocked by rotating the end cover, the sealing effect of the valve element on the air inlet hole is achieved in sequence by pushing the spring through the adjusting block, the hexagonal screw is inserted into the through hole and extends into the third hexagonal groove, the adjusting block can be directly rotated, and the sealing effect of the valve element on the air inlet hole is achieved. And therefore, the adjusting block moves in the threaded groove, the extrusion strength on the spring is adjusted, the minimum air inlet pressure value is adjusted, adjustment can be conducted when the minimum air inlet pressure value is weakened, continuous use is achieved, the service life is prolonged, and the sealing effect is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more particularly to an inlet and exhaust valve for a natural gas compressor. Background Art

[0002] A compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. Natural gas compressors are a type of compressor primarily used in gas filling stations to pressurize incoming gas from tank trucks and transport it through pipelines to gas dispensers and gas cylinders within the station. The inlet and exhaust valves are key components of piston-type natural gas compressors, and their design significantly impacts compressor efficiency, vibration, noise, and reliability.

[0003] The existing compressor intake and exhaust valves have an internal valve core that is pushed by a spring to achieve sealing of the valve core to the air intake hole. The maximum distance between the two ends of the spring is limited by the volume of the valve body. When the spring is used multiple times and its elasticity decreases, it will affect the sealing strength of the valve core to the air intake hole, resulting in a decrease in the sealing effect and a decrease in the minimum pressure value of the intake air. The compressor can only be used after disassembly and replacement of the spring. It is inconvenient to adjust the pushing force of the spring on the valve core, thereby adjusting the minimum pressure value of the intake air, which is inconvenient to use. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an intake and exhaust valve for a natural gas compressor to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an intake and exhaust valve for a natural gas compressor, comprising a valve body, a valve core provided in the middle of the valve body, an end cap provided at one end of the valve core, a first connecting groove provided at one end of an inner cavity of the valve body, an air cavity provided at the other end, exhaust holes provided around the inner cavity of the air cavity, a limiting groove provided on a side of the valve core close to the end cap, and a spring provided in the middle of the limiting groove;

[0006] A threaded groove is formed at one end of the end cap, an adjusting block is provided in the middle of the threaded groove, a third hexagonal groove is formed at one end of the adjusting block, a through hole is formed on one side of the inner cavity of the threaded groove, and a first sealing gasket is provided at the end of the valve core away from the limiting groove;

[0007] A positioning groove is provided at one end of the valve core close to the first sealing gasket, and a positioning collar is fixedly connected to the inner cavity of the first sealing gasket. A second connecting groove is provided at one end of the valve body, and a second sealing gasket is provided in the inner cavity of the second connecting groove.

[0008] Preferably, the cross-sectional shape of the end cover is set to be "T"-shaped, the first connecting groove is adapted to the end cover, the end cover is arranged in the middle of the first connecting groove, and the end cover is threadedly connected to the first connecting groove.

[0009] Preferably, a first hexagonal groove is provided on one side of the end cover, the first hexagonal groove is connected to the through hole, and a third hexagonal groove is provided on one end of the adjustment block, the third hexagonal groove corresponds to the through hole.

[0010] Preferably, the regulating block is threadedly connected to the thread groove, one end of the spring extends into the interior of the regulating block, and a second hexagonal groove is formed at one end of the valve core close to the regulating block.

[0011] Preferably, a sealing groove is provided on the outer surface of the valve core, a second sealing ring is provided in the middle of the sealing groove, and the wall of the valve core is in contact with the inner cavity wall of the valve body.

[0012] Preferably, the end of the valve core close to the first sealing gasket is set to be conical, the first sealing gasket is adapted to one end of the valve core, the positioning groove is adapted to the positioning clamp ring, and the positioning clamp ring is set in the middle of the positioning groove.

[0013] Preferably, the end wall of the inner cavity of the valve body away from the end cover is set to be conical and adapted to the conical end of the valve core, and the outer surface of the end of the valve body close to the second connecting groove is provided with a first sealing ring.

[0014] The technical effects and advantages of this utility model are:

[0015] The utility model first blocks one end of the valve body by rotating the end cover, and pushes the spring by the adjusting block, so that the spring pushes the valve core, thereby realizing the sealing effect of the valve core on the air inlet hole through the first sealing gasket, and the hexagonal screw is inserted through the through hole and extends to the inside of the third hexagonal groove, and the adjusting block can be directly rotated to move the adjusting block inside the threaded groove, thereby adjusting the squeezing strength of the spring, thereby realizing the adjustment of the minimum pressure value of the air intake, and the adjustment can be made when the minimum pressure value of the air intake is weakened, thereby realizing continued use, improving service life, and not affecting the sealing effect;

[0016] The utility model also facilitates the installation and positioning of the first sealing gasket through the cooperation of the provided positioning clamp ring and the positioning clamp groove, and facilitates the disassembly and replacement of the first sealing gasket. At the same time, the cooperation of the second connecting groove and the second sealing gasket facilitates the connection of the external pipeline, and the second sealing ring improves the sealing strength between the valve core and the valve body. The first hexagonal groove facilitates the installation and fixation of the end cover, and facilitates installation and disassembly for maintenance work.

[0017] In summary, through the mutual influence of the above-mentioned multiple effects, it is convenient to adjust the extrusion strength of the spring when the spring elasticity decreases, thereby adjusting the minimum pressure value of the intake air, thereby not affecting the sealing effect and improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0020] Figure 3 This is a schematic diagram of the split cross-sectional structure of the valve core and valve body of the utility model.

[0021] Figure 4 This is a schematic diagram of the split cross-sectional structure of the end cover, valve core and first sealing gasket of the utility model.

[0022] Figure 5 This is a schematic diagram of the disassembled structure of the end cover and the adjustment block of the utility model.

[0023] Figure 6 This is a schematic diagram of the disassembled structure of the valve core and the first sealing gasket of the utility model.

[0024] The accompanying drawings are marked as follows: 1. valve body; 2. first connecting groove; 3. end cover; 4. valve core; 5. first sealing gasket; 6. limiting groove; 7. spring; 8. adjusting block; 9. through hole; 10. threaded groove; 11. air cavity; 12. exhaust hole; 13. first sealing ring; 14. sealing groove; 15. second sealing ring; 16. positioning groove; 17. positioning ring; 18. first hexagonal groove; 19. second hexagonal groove; 20. third hexagonal groove; 21. second connecting groove; 22. second sealing gasket. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] As attached Figure 1-6 The shown intake and exhaust valve for a natural gas compressor includes a valve body 1, a valve core 4 is provided in the middle of the valve body 1, and one end of the valve body 1 can be blocked and opened by moving the valve core 4. An end cover 3 is provided at one end of the valve core 4, which can block the other end of the valve body 1. At the same time, the internal parts of the valve body 1 can be easily repaired and replaced by disassembling the end cover 3. A first connecting groove 2 is provided at one end of the inner cavity of the valve body 1 to facilitate the installation and fixation of the end cover 3, and an air cavity 11 is provided at the other end to facilitate the storage of intake air. Exhaust holes 12 are provided around the inner cavity of the air cavity 11 to facilitate the exhaust. A limiting groove 6 is provided on the side of the valve core 4 close to the end cover 3, and a spring 7 is provided in the middle of the limiting groove 6 to limit the placement of the spring 7;

[0027] A threaded groove 10 is provided at one end of the end cap 3, an adjusting block 8 is provided in the middle of the threaded groove 10, a third hexagonal groove 20 is provided at one end of the adjusting block 8, a through hole 9 is provided on one side of the inner cavity of the threaded groove 10, and a first sealing gasket 5 is provided at the end of the valve core 4 away from the limit groove 6. By adjusting the position of the adjusting block 8 inside the threaded groove 10, the pushing force of the spring 7 on the valve core 4 can be adjusted, which is convenient for adjusting the intake pressure. A hexagonal tool can be inserted through the provided through hole 9 to rotate and adjust the adjusting block 8. By squeezing the first sealing gasket 5 by the valve core 4, the sealing strength of the air inlet hole can be improved;

[0028] A positioning groove 16 is provided at one end of the valve core 4 close to the first sealing gasket 5, and a positioning clamp ring 17 is fixedly connected to the inner cavity of the first sealing gasket 5. A second connecting groove 21 is provided at one end of the valve body 1, and a second sealing gasket 22 is provided in the inner cavity of the second connecting groove 21. Through the cooperation of the positioning groove 16 and the positioning clamp ring 17, the stability of the installation of the first sealing gasket 5 is improved, the first sealing gasket 5 is prevented from sliding, and the sealing strength is improved. The second connecting groove 21 and the second sealing gasket 22 are used to facilitate the connection of the air inlet at one end of the valve body 1 to the equipment, which is convenient for use.

[0029] As attached Figure 2-5 As shown, the cross-sectional shape of the end cover 3 is set to be "T"-shaped, the first connecting groove 2 is adapted to the end cover 3, the end cover 3 is arranged in the middle of the first connecting groove 2, and the end cover 3 is threadedly connected to the first connecting groove 2, which is convenient for installing and fixing the end cover 3, thereby sealing one end of the valve body 1. At the same time, since the threaded connection is self-sealing, there is good air tightness between the end cover 3 and the inner wall of the first connecting groove 2 and between the adjusting block 8 and the threaded groove 10.

[0030] As attached Figure 1-4 As shown, a first hexagonal groove 18 is provided on one side of the end cover 3, and the first hexagonal groove 18 is connected to the through hole 9. A third hexagonal groove 20 is provided on one end of the adjusting block 8, and the third hexagonal groove 20 corresponds to the through hole 9. The through hole 9 facilitates the insertion of external tools into the interior of the threaded groove 10 and extends to the interior of the third hexagonal groove 20 to rotate the adjusting block 8, which is convenient for adjustment. The second hexagonal groove 19 is provided to facilitate the removal of the valve core 4 from the interior of the valve body 1, and the first hexagonal groove 18 facilitates the rotation, installation and disassembly of the end cover 3.

[0031] As attached Figure 2-5 As shown, the adjusting block 8 is threadedly connected to the thread groove 10, one end of the spring 7 extends to the inside of the adjusting block 8, and a second hexagonal groove 19 is provided at the end of the valve core 4 close to the adjusting block 8. By adjusting the depth of the adjusting block 8 inside the thread groove 10, the distance between the two ends of the spring 7 can be adjusted, thereby adjusting the thrust of the spring 7 on the valve core 4, which is convenient for adjustment and use.

[0032] As attached Figure 2 、 3 As shown in Figures 4 and 6, a sealing groove 14 is provided on the outer surface of the valve core 4, and a second sealing ring 15 is provided in the middle of the sealing groove 14. The wall of the valve core 4 fits with the inner wall of the valve body 1, and the second sealing ring 15 is limited by the sealing groove 14. The sealing strength between the valve body 1 and the valve core 4 is improved by the second sealing ring 15.

[0033] As attached Figure 2 、 3 As shown in Figures 4 and 6, the end of the valve core 4 close to the first sealing gasket 5 is set to a cone, the first sealing gasket 5 is adapted to one end of the valve core 4, the positioning groove 16 is adapted to the positioning clamp ring 17, and the positioning clamp ring 17 is arranged in the middle of the positioning groove 16. Through the cooperation of the positioning groove 16 and the positioning clamp ring 17, the fitting strength between the first sealing gasket 5 and the valve core 4 is improved, and the first sealing gasket 5 can be replaced as needed.

[0034] As attached Figure 2 、 3 As shown in Figures 4 and 6, the inner cavity of the valve body 1 has an end wall away from the end cover 3 that is set to be conical and adapted to the cone at one end of the valve core 4. A first sealing ring 13 is provided on the outer surface of one end of the valve body 1 close to the second connecting groove 21 to improve the sealing strength of the valve core 4 to the air inlet at one end of the valve body 1, and the first sealing ring 13 is used to improve the installation connection sealing strength of the valve body 1.

[0035] It is worth noting that when used as an inlet valve, the air inlet at one end of the valve body 1 is connected to the external pipeline, and the air outlet is connected to the compression chamber of the natural gas compressor. When used as an exhaust valve, the air inlet at one end of the valve body 1 is connected to the compression chamber of the natural gas compressor, and the air outlet is connected to the external pipeline.

[0036] The working principle of the utility model is as follows: when in use, it is only necessary to rotate the adjusting block 8 to move inside the threaded groove 10 to adjust the pushing force of the spring 7 on the valve core 4, thereby increasing the pushing force of the external gas on the valve core 4, so as to push the valve core 4 to allow the external gas to enter the interior of the air cavity 11;

[0037] The compression of the valve core 4 on the first sealing gasket 5 can improve the sealing strength of the valve core 4 to the air inlet when the internal and external pressures are the same. The cooperation of the positioning groove 16 and the positioning collar 17 can improve the connection strength between the first sealing gasket 5 and the valve core 4. When the first sealing gasket 5 is damaged, it can be easily disassembled and replaced, thereby improving the use effect.

[0038] One end of the valve body 1 is limited and blocked by the end cover 3, which is convenient for installation, maintenance and use.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An inlet and outlet valve for a natural gas compressor, comprising a valve body (1), characterized in that: A valve core (4) is provided in the middle of the valve body (1), an end cover (3) is provided at one end of the valve core (4), a first connecting groove (2) is provided at one end of the inner cavity of the valve body (1), and an air cavity (11) is provided at the other end, exhaust holes (12) are provided around the inner cavity of the air cavity (11), a limiting groove (6) is provided on one side of the valve core (4) close to the end cover (3), and a spring (7) is provided in the middle of the limiting groove (6); A threaded groove (10) is provided at one end of the end cover (3), an adjusting block (8) is provided in the middle of the threaded groove (10), a third hexagonal groove (20) is provided at one end of the adjusting block (8), a through hole (9) is provided on one side of the inner cavity of the threaded groove (10), and a first sealing gasket (5) is provided at the end of the valve core (4) away from the limiting groove (6); A positioning groove (16) is provided at one end of the valve core (4) close to the first sealing gasket (5), and a positioning collar (17) is fixedly connected to the inner cavity of the first sealing gasket (5). A second connecting groove (21) is provided at one end of the valve body (1), and a second sealing gasket (22) is provided in the inner cavity of the second connecting groove (21).

2. The inlet and exhaust valve for a natural gas compressor according to claim 1, characterized in that: The cross-sectional shape of the end cover (3) is set to be "T"-shaped, the first connecting groove (2) is adapted to the end cover (3), the end cover (3) is arranged in the middle of the first connecting groove (2), and the end cover (3) is threadedly connected to the first connecting groove (2).

3. The inlet and exhaust valve for a natural gas compressor according to claim 1, characterized in that: A first hexagonal slot (18) is provided on one side of the end cover (3), and the first hexagonal slot (18) is connected to the through hole (9). A third hexagonal slot (20) is provided on one end of the adjustment block (8), and the third hexagonal slot (20) corresponds to the through hole (9).

4. The intake and exhaust valve for a natural gas compressor according to claim 1, characterized in that: The regulating block (8) is threadedly connected to the thread groove (10), one end of the spring (7) extends into the interior of the regulating block (8), and a second hexagonal groove (19) is formed at one end of the valve core (4) close to the regulating block (8).

5. The inlet and exhaust valve for a natural gas compressor according to claim 1, characterized in that: A sealing groove (14) is provided on the outer surface of the valve core (4), a second sealing ring (15) is provided in the middle of the sealing groove (14), and the wall of the valve core (4) is in contact with the inner cavity wall of the valve body (1).

6. The intake and exhaust valve for a natural gas compressor according to claim 1, characterized in that: One end of the valve core (4) close to the first sealing gasket (5) is configured to be conical, the first sealing gasket (5) is adapted to one end of the valve core (4), the positioning groove (16) is adapted to the positioning collar (17), and the positioning collar (17) is configured to be located in the middle of the positioning groove (16).

7. The intake and exhaust valve for a natural gas compressor according to claim 1, characterized in that: An end wall of the inner cavity of the valve body (1) away from the end cover (3) is configured to be conical and adapted to the conical end of the valve core (4). A first sealing ring (13) is provided on the outer surface of one end of the valve body (1) close to the second connecting groove (21).

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