Pressure release valve of claw type compressor

Abstract

The utility model discloses a claw type compressor pressure release valve and belongs to the technical field of pressure release valve manufacturing. Comprising a valve body, a sealing nut, a silencer, a mounting seat and a valve element assembly, the sealing nut is arranged at an upper port of the valve body, the mounting seat is arranged at a lower port of the valve body, and the valve element assembly is arranged in the valve body and comprises an adjusting rod, a center rod, a spring seat, a spring and a valve element. The middle of the bottom of the valve element extends downwards to form a fixing column, a plurality of fixing supports are evenly distributed on the periphery of the fixing column, a cavity is formed in the space between every two adjacent fixing supports, the valve element is expanded in the radial direction to form a valve element end face, and the valve element end face is placed on the mounting base end face at the top of the mounting base. The fixed support is contained in the inner hole of the mounting base, high-pressure gas enters the cavity from the inner hole to push away the end face of the valve element, and the gas enters the valve body and is finally exhausted from the silencer. The pressure relief valve has the advantages that the working stability of the pressure relief valve can be improved, and the output pressure of the claw compressor is constant.

Description

Technical Field

[0001] The utility model belongs to the technical field of relief valve manufacturing, and particularly relates to a claw compressor relief valve. Background Art

[0002] A claw compressor compresses a medium by a pair of claw-shaped rotors rotating synchronously and reversely in a pump chamber, realizes the periodic change of the pump chamber volume, and completes the processes of gas suction, compression and discharge, thus completing the working cycle. There is no contact between the pair of claw-shaped rotors, and there is a small gap between the rotors and the pump chamber. No lubricating oil and working fluid need to be added to the compression chamber. Compared with traditional compressors, claw compressors have low energy consumption, low noise, are maintenance-free and have a long service life.

[0003] The exhaust pressure is an important technical parameter that needs to be concerned about in the actual use of the compressor. If the exhaust pressure is too high, the safety and reliability of the compressor will be reduced, and the service life of the compressor will be affected. The relief valve is a safety device of the claw compressor. When the compressor is working, when the exhaust pressure exceeds the allowable upper limit value, the relief valve acts to avoid abnormal exhaust pressure, playing a role in overpressure and overheat protection for the claw compressor. However, in the actual use process, there are still defects in the relief valve of the claw compressor, such as large gas flow resistance, high noise, unstable output pressure of the compressor, and poor working stability.

[0004] In view of the above-mentioned existing technology, it is necessary to improve the structure of the existing relief valve of the claw compressor. Therefore, the applicant has made a beneficial design, and the technical solution to be introduced below is generated under this background. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a claw compressor relief valve, which can improve the working stability of the relief valve and keep the output pressure of the claw compressor constant.

[0006] The object of the present utility model is achieved in the following way. A claw type compressor pressure relief valve includes a valve body, a sealing nut, a silencer, a mounting seat and a valve core assembly. The valve body is vertically through. The sealing nut is sealingly arranged at the upper port of the valve body. The silencer is arranged on one side of the valve body and communicated with the inner cavity of the valve body. The mounting seat is sealingly arranged at the lower port of the valve body. An inner hole penetrating from top to bottom is formed in the middle of the mounting seat. The valve core assembly is arranged in the valve body and includes an adjusting rod, a central rod, a spring seat, a spring and a valve core. The adjusting rod is threadedly connected to the upper port of the valve body. The upper part of the central rod is arranged in the adjusting rod, and the lower end is threadedly connected to the valve core. The spring seat and the spring are sequentially sleeved on the lower part of the central rod from top to bottom. The upper end of the spring abuts against the spring seat, and the lower end abuts against the valve core. The valve core extends downward in the middle of the bottom to form a fixing column, and a plurality of fixing supports are evenly distributed around the fixing column. The space between two adjacent fixing supports forms a cavity. The valve core radially expands to form a valve core end face, and the valve core end face is placed on the mounting seat end face at the top of the mounting seat. The fixing supports are received in the inner hole of the mounting seat. High-pressure gas enters the cavity from the inner hole, pushes open the valve core end face, the gas enters the valve body, and finally is discharged from the silencer.

[0007] In a specific embodiment of the present utility model, the number of the fixing supports is three, and the included angle between two adjacent fixing supports is 120 degrees.

[0008] In another specific embodiment of the present utility model, the upper end of the valve body is narrowed to form an upper port, and the upper port is a threaded port. The adjusting rod is formed with an upper threaded section on the outside, and the upper threaded section is threadedly connected to the threaded port and fastened by an upper nut.

[0009] In still another specific embodiment of the present utility model, the valve core is convexly provided with a connecting seat upward in the middle of the top. A valve core threaded hole is formed in the middle of the connecting seat. The lower end of the central rod is formed with a lower threaded section, and the lower threaded section is threadedly connected to the valve core threaded hole and locked by a lower nut. The lower end of the spring is sleeved on the connecting seat.

[0010] In yet another specific embodiment of the present utility model, the valve body is provided with an opening on one side, and the opening is cooperatively installed with one end of the silencer to form an air outlet channel for the intake air to enter the silencer from the valve body.

[0011] In still another specific embodiment of the present utility model, the sealing nut covers the threaded port, and the bottom end is sealingly connected to the upper shoulder of the valve body through a first sealing gasket.

[0012] In a further specific embodiment of the present utility model, a circular boss is formed around the middle of the mounting base. The lower port of the valve body is fitted and installed with the upper port of the mounting base, and the lower port of the valve body is hermetically connected to the boss through a second gasket.

[0013] Due to the adoption of the above structure, compared with the prior art, the present utility model has the beneficial effects that: multiple fixed supports divide the inner hole of the mounting base into multiple cavities, thereby reducing the gas flow resistance. The valve core and the spring can remain stable and do not vibrate under the impact of gas; there is no leakage when the valve core is closed; the output pressure of the claw type compressor can be kept constant, the working noise can be reduced, and the structure is simple and convenient for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a front view of the present utility model;

[0016] Figure 3 is a schematic diagram of the structure of the valve core of the present utility model.

[0017] In the figure: 1. valve body, 11. threaded port, 12. channel, 13. upper shoulder; 2. sealing nut; 3. muffler; 4. mounting base, 41. inner hole, 42. mounting base end face, 43. boss; 5. valve core assembly, 51. adjusting rod, 511. upper threaded section, 52. upper nut, 53. center rod, 531. lower threaded section, 54. spring seat, 55. spring, 56. lower nut, 57. valve core, 571. fixing column, 572. fixed support, 573. cavity, 574. valve core end face, 575. connecting seat, 5751. valve core threaded hole; 6. first gasket; 7. second gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will describe in detail the specific embodiments of the present utility model in conjunction with the drawings. However, the description of the embodiments is not a limitation on the technical solution. Any change in form rather than in essence based on the concept of the present utility model should be regarded as the protection scope of the present utility model.

[0019] In the following description, all concepts related to the directionality (or orientation) such as up, down, left, right, front and back are in the context of the position state of the figure being described, aiming to facilitate public understanding. Therefore, it cannot be understood as a special limitation on the technical solution provided by the present utility model.

[0020] Please refer to Figure 1 and Figure 2, the present utility model relates to a relief valve for a claw compressor, which includes a valve body 1, a sealing nut 2, a silencer 3, a mounting seat 4 and a valve core assembly 5. The valve body 1 is vertically through, and the upper end of the valve body 1 is narrowed to form an upper port, and this upper port is a threaded port 11. The sealing nut 2 is sleeved on the threaded port 11 at the upper port of the valve body 1, and the bottom end of the sealing nut 2 is hermetically connected to the upper end shoulder 13 of the valve body 1 through a first gasket 6. The silencer 3 is arranged on one side of the valve body 1, and the valve body 1 is provided with an opening on one side, and this opening is cooperatively installed with one end of the silencer 3 to form an air outlet channel 12 communicating the valve body 1 and the silencer 3. The mounting seat 4 is hermetically arranged at the lower port of the valve body 1, and an inner hole 41 penetrating from top to bottom is formed in the middle of the mounting seat 4. A ring of bosses 43 is formed around the middle of the mounting seat 4, the lower port of the valve body 1 is cooperatively installed with the upper port of the mounting seat 4, and the lower port of the valve body 1 is hermetically connected to the boss 43 through a second gasket 7.

[0021] The valve core assembly 5 is arranged in the valve body 1 and includes an adjusting rod 51, an upper nut 52, a center rod 53, a spring seat 54, a spring 55, a lower nut 56 and a valve core 57. An upper threaded section 511 is formed on the outer side of the adjusting rod 51, and the upper threaded section 511 is threadedly connected to the threaded port 11 of the valve body 1 and fastened by the upper nut 52. The upper part of the center rod 53 is arranged inside the adjusting rod 51. A connecting seat 575 protrudes upward in the middle of the top of the valve core 57, a valve core threaded hole 5751 is formed in the middle of the connecting seat 575, a lower threaded section 531 is formed at the lower end of the center rod 53, and the lower threaded section 531 is threadedly connected to the valve core threaded hole 5751 and locked by the lower nut 56. The spring seat 54 and the spring 55 are sequentially sleeved on the lower part of the center rod 53 from top to bottom. The upper end of the spring 55 abuts against the spring seat 54, and the lower end is sleeved on the connecting seat 575 and abuts against the valve core 57. After the adjusting rod 51 rotates, it moves up and down, and in particular, the pre-tightening force of the spring 75 can be adjusted to adapt to the intake air of different pressures.

[0022] See Figure 3, the valve core 57 extends downward in the middle of the bottom to form a fixing column 571, and a plurality of fixing supports 572 are evenly distributed around the fixing column 571. In this embodiment, the number of the fixing supports 572 is three, and the included angle between two adjacent fixing supports 572 is 120 degrees. The space between two adjacent fixing supports 572 forms a cavity 573, which serves as an air inlet passage. The valve core 57 radially expands to form a valve core end face 574, and the valve core end face 574 is placed on the mounting seat end face 42 at the top of the mounting seat 4. The fixing supports 572 are received in the inner hole 41 of the mounting seat 4. When the pressure relief valve works, high-pressure gas enters the three cavities 573 from the inner hole 41, and the gas is dispersed, thereby reducing the gas flow resistance. Under the impact of the gas, the valve core 57 and the spring 55 can remain stable without jitter, ensuring the stability of the pressure relief valve during operation; the gas pushes open the valve core end face 574 and enters the valve body 1, and then is discharged from the silencer 3 through the air outlet passage 12. The force for the gas to push open the valve core end face 574 is adjusted by the adjusting rod 51, thereby enabling the output pressure of the claw compressor to be constant.

Claims

1. A claw-type compressor pressure relief valve, comprising a valve body (1), a sealing nut (2), a muffler (3), a mounting seat (4) and a valve core assembly (5), wherein the valve body (1) is connected from top to bottom, the sealing nut (2) is sealingly arranged at the upper end of the valve body (1), the muffler (3) is arranged on one side of the valve body (1) and communicates with the inner cavity of the valve body (1), the mounting seat (4) is sealingly arranged at the lower end of the valve body (1), an inner hole (41) is formed in the middle of the mounting seat (4) and is connected from top to bottom, and the valve core assembly (5) is arranged at the valve The valve body (1) includes an adjusting rod (51), a center rod (53), a spring seat (54), a spring (55) and a valve core (57). The adjusting rod (51) is threadedly connected to the upper end of the valve body (1). The upper part of the center rod (53) is inserted into the adjusting rod (51), and the lower end is threadedly connected to the valve core (57). The spring seat (54) and the spring (55) are sequentially sleeved on the lower part of the center rod (53) from top to bottom. The upper end of the spring (55) abuts against the spring seat (54), and the lower end abuts against the valve core (57). The valve body (1) is characterized in that: The valve core (57) extends downward from the middle of the bottom to form a fixed column (571), and a plurality of fixed supports (572) are evenly distributed around the fixed column (571). The space between two adjacent fixed supports (572) forms a cavity (573). The valve core (57) is radially expanded to form a valve core end face (574). The valve core end face (574) is placed on the mounting seat end face (42) at the top of the mounting seat (4). The fixed support (572) is accommodated in the inner hole (41) of the mounting seat (4). High-pressure gas enters the cavity (573) from the inner hole (41), pushes open the valve core end face (574), and the gas enters the valve body (1) and is finally discharged from the muffler (3).

2. A claw type compressor pressure relief valve according to claim 1, characterized in that: There are three fixed supports (572), and the angle between two adjacent fixed supports (572) is 120 degrees.

3. A claw type compressor pressure relief valve according to claim 1, characterized in that: The valve body (1) is narrowed at the upper end to form an upper port, which is a threaded port (11). The adjusting rod (51) is formed with an upper threaded section (511) on the outer side. The upper threaded section (511) is threadedly connected to the threaded port (11) and is fastened by an upper nut (52).

4. A claw type compressor pressure relief valve according to claim 1, characterized in that: The valve core (57) is provided with a connecting seat (575) protruding upward in the middle of the top, and a valve core threaded hole (5751) is formed in the middle of the connecting seat (575). A lower threaded section (531) is formed at the lower end of the center rod (53), and the lower threaded section (531) is threadedly connected to the valve core threaded hole (5751) and locked by a lower nut (56). The lower end of the spring (55) is sleeved on the connecting seat (575).

5. The claw type compressor pressure relief valve according to claim 1, characterized in that: The valve body (1) is provided with an opening on one side, and the opening is installed in cooperation with one end of the muffler (3) to form an outlet passage (12) for the intake air to enter the muffler (3) from the valve body (1).

6. A claw type compressor pressure relief valve according to claim 3, characterized in that: The sealing nut (2) is covered on the threaded opening (11), and the bottom end is sealedly connected to the upper shoulder (13) of the valve body (1) via a first sealing gasket (6).

7. The claw type compressor pressure relief valve according to claim 1, characterized in that: The mounting seat (4) is formed with a circle of bosses (43) around the middle part, the lower port of the valve body (1) is mounted in cooperation with the upper port of the mounting seat (4), and the lower port of the valve body (1) is sealed and connected with the bosses (43) via a second sealing gasket (7).

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