Protection device for preventing high-pressure gas from countercurrent flow during shutdown of compressor

Abstract

The utility model discloses a protection device for preventing high-pressure gas from countercurrent during shutdown of a compressor, which comprises a compressor main body, an exhaust port and an exhaust cavity which are communicated with each other are arranged in the compressor main body, a one-way sealing seat is arranged in the exhaust cavity, and a connecting bolt is slidably arranged at one end of the one-way sealing seat. A sealing gasket for sealing the exhaust port is arranged at the end of the connecting bolt, the same attaching spring is arranged between the sealing gasket and the one-way sealing seat in a sleeved mode and used for anti-reverse protection of high-pressure gas of the compressor, and the sealing gasket comprises a connecting seat connected with the connecting bolt in a penetrating mode. A penetrating pad attached to the exhaust port is arranged on one side of the connecting base, and a base plate attached to the exhaust cavity is arranged on one side of the penetrating pad and used for sealing the exhaust port. The compressor protection device can exhaust high-pressure gas efficiently when the compressor works, and external gas is prevented from flowing back when the compressor is shut down.

Description

Technical Field

[0001] This utility model relates to a compressor protection device, and more particularly to a protection device for preventing high-pressure gas backflow when the compressor stops. Background Technology

[0002] A compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas; it is the heart of a refrigeration system. It draws in low-temperature, low-pressure refrigerant gas through the suction pipe, compresses it, and then discharges high-temperature, high-pressure refrigerant gas through the discharge pipe, providing power for the refrigeration cycle.

[0003] When a compressor is operating, it needs to periodically compress the gas to raise the pressure to the high pressure required for system operation. The exhaust process is a crucial step in maintaining stable system operation: on the one hand, timely discharge of compressed high-pressure gas reduces the internal pressure of the cylinder, preventing overload damage to mechanical components due to continuous pressure accumulation. Simultaneously, the high-pressure gas is delivered to subsequent processes for energy conversion and utilization, such as in a refrigeration system where high-pressure gaseous refrigerant completes the refrigeration cycle after condensation and throttling. On the other hand, a reasonable exhaust design optimizes the compressor's energy efficiency and reduces wasted energy. However, when the compressor stops, the residual high-pressure gas inside the system tends to flow backward, causing low-pressure gas from the outside to backflow into the compressor. This can deform valve plates, affect the sealing performance of seals, and cause abnormal vibrations in the equipment. Therefore, it is necessary to design a high-pressure gas backflow protection device that ensures efficient exhaust during compressor operation and prevents backflow of gas when the compressor stops. Utility Model Content

[0004] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a high-pressure gas backflow protection device to prevent high-pressure gas from flowing back when the compressor stops, so as to achieve the purpose of the high-pressure gas backflow protection device to efficiently exhaust high-pressure gas and prevent gas backflow.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A high-pressure gas backflow protection device for preventing compressor shutdown includes a compressor body. The compressor body has a through-connected exhaust port and exhaust chamber. The exhaust chamber has a one-way sealing seat. A connecting bolt is slidably provided at one end of the one-way sealing seat. A sealing gasket for sealing the exhaust port is provided at the end of the connecting bolt. The sealing gasket and the one-way sealing seat are fitted with the same contact spring for high-pressure gas backflow protection of the compressor.

[0007] Preferably, the sealing gasket includes a connecting seat that is connected through the connecting bolt, a through gasket that fits against the exhaust port is provided on one side of the connecting seat, and a gasket that fits against the exhaust chamber is provided on one side of the through gasket for sealing the exhaust port.

[0008] Preferably, the through-hole gasket has a platform-shaped structure, and the through-hole gasket is distributed through the exhaust port. A fitting cover is provided between the through-hole gasket and the gasket plate. The opening end of the fitting cover is located on the same side as the connecting seat. Several limiting strips are provided on the inner side of the fitting cover to limit the loosening of the gasket to the exhaust port.

[0009] Preferably, one end of the connecting bolt is provided with a threaded rod that passes through the sealing gasket, and a hoop is sleeved on the outside of the connecting bolt to limit the position of the gasket, thereby increasing the connection between the sealing gasket and the connecting bolt.

[0010] Preferably, the one-way sealing seat includes a fixed tube fixed in the exhaust chamber, and the connecting bolt passes through the fixed tube. The fixed tube has an opening, and a return spring connected to the connecting bolt is provided in the fixed tube for the elastic return of the connecting bolt.

[0011] Preferably, a positioning block is provided in the middle of the connecting bolt, a through groove is provided inside the fixing tube for the positioning block to slide, and the same sealing ring is provided between the fixing tube and the connecting bolt.

[0012] Preferably, the fixing tube has a slot for the connecting bolt to pass through, and the fixing tube has a pressure equalization chamber inside, with a through hole connecting the pressure equalization chamber and the slot, for stable sealing when the device is stopped.

[0013] Compared with existing technologies, the high-pressure gas backflow protection device provided by this utility model can discharge high-pressure gas inside the compressor and prevent backflow gas from flowing into the compressor. Specifically, through a one-way sealing seat in the exhaust chamber and a sliding sealing seat, the exhaust port can be sealed one-way, so that the sealing gasket applies a certain pressure to seal the exhaust port. When high-pressure gas is generated in the compressor, it can break through the sealing gasket and pass through the exhaust port to discharge. When the compressor stops, the sealing gasket can seal the exhaust port to prevent low-pressure gas in the exhaust chamber from entering, thus protecting the internal structure of the compressor and increasing the safety of compressor use.

[0014] Furthermore, the design of the sealing gasket, including the platform-shaped through-gasket, gasket plate, and fitting cover, allows for simultaneous fitting of the exhaust port and exhaust chamber. This improves the sealing fit and stability between the sealing gasket and the compressor, increases the friction between the sealing gasket and the exhaust chamber, and prevents the connecting bolt from rotating in the opposite direction and the sealing gasket from loosening. Next, the use of the limiting strip in the middle of the connecting bolt allows for linear sliding of the connecting bolt, preventing the connecting bolt from shifting off from the fixed pipe. This facilitates the sealing gasket to quickly seal with the exhaust port, improves the accuracy of the backflow prevention of the protective device at the exhaust port, prevents gas backflow in the exhaust chamber, improves the protective stability of the protective device, and ultimately enhances the protective strength of the protective device at the exhaust port.

[0015] It should be understood that the general descriptions and details herein are exemplary and illustrative only and are not intended to limit this disclosure.

[0016] This application provides an overview of various implementations or exemplary embodiments of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0017] Figure 1 This is a two-dimensional cross-sectional view of the high-pressure gas backflow protection device for preventing compressor shutdown of this utility model on the compressor body;

[0018] Figure 2 This is a three-dimensional sectional view of the high-pressure gas backflow protection device for preventing compressor shutdown of this utility model on the compressor body;

[0019] Figure 3 This is a partial structural diagram of the high-pressure gas backflow protection device for preventing compressor shutdown in the main body of the present invention.

[0020] Figure 4 This is a schematic diagram of the sealing gasket and fixing pipe in the high-pressure gas backflow protection device for preventing compressor shutdown according to this utility model;

[0021] Figure 5 This is a partial structural cross-sectional view of the sealing gasket in the high-pressure gas backflow protection device for preventing compressor shutdown according to this utility model;

[0022] Figure 6 This is a partial structural cross-sectional view of the fixed pipe in the high-pressure gas backflow protection device for preventing compressor shutdown according to this utility model;

[0023] Figure 7 This is a partial structural cross-sectional view of the fixed pipe in the high-pressure gas backflow protection device for preventing compressor shutdown according to this utility model.

[0024] Key reference numerals:

[0025] 1. Compressor body; 2. Exhaust port; 3. Exhaust chamber; 4. Sealing gasket; 5. One-way sealing seat; 6. Connecting seat; 7. Through gasket; 8. Gasket plate; 9. Connecting bolt; 10. Fixing pipe; 11. Return spring; 12. Contact spring; 13. Through port; 14. Contact cover; 15. Limiting strip; 16. Positioning block; 17. Sealing ring; 18. Through groove; 19. Pressure equalizing chamber; 20. Through hole; 21. Threaded rod; 22. Hoop ring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the embodiments of this disclosure will be described in more detail below with reference to the accompanying drawings. Note: The described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0027] As attached Figure 1 To be continued Figure 7 As shown in the embodiment of this utility model, a high-pressure gas backflow protection device is provided to prevent high-pressure gas from flowing back into the compressor when it stops. Currently, the compressor discharges high-pressure gas to the outside during use. The gas flows from the exhaust port 2 into the exhaust chamber 3 and then transfers. To prevent low-pressure gas from flowing back into the compressor when it stops and damaging its internal structure, a protective structure can be added to the exhaust port 2 to block the backflow of gas. Specifically, the compressor body 1 has an exhaust port 2 and an exhaust chamber 3 that are connected through it. Then, a one-way sealing seat 5 is set inside the exhaust chamber 3. A connecting bolt 9 slides on one end of the one-way sealing seat 5, and a sealing gasket 4 is set at the end of the connecting bolt 9 to seal the exhaust port 2. The sealing gasket 4 and the one-way sealing seat 5 are fitted with the same contact spring 12. The contact spring 12 can abut against the sealing gasket 4 and fit into the exhaust port 2, so that the sealing gasket 4 seals the exhaust port 2 and the exhaust chamber 3, blocking the low-pressure gas in the exhaust chamber 3 when it stops, preventing backflow of discharged gas, facilitating the reuse of the compressor, and improving the compressor's performance.

[0028] It is worth noting that in some embodiments, the sealing gasket 4 can be connected to the connecting bolt 9 through the connecting seat 6 to achieve limiting and fixing. The connecting seat 6 is used to limit the connection between the connecting bolt 9 and the connecting seat 6. Then, a through gasket 7 that fits against the exhaust port 2 is set on one side of the connecting seat 6, and a gasket 8 that fits against the exhaust chamber 3 is set on one side of the through gasket 7 to seal the exhaust port 2, thereby increasing the sealing completeness of the sealing gasket 4 to the compressor exhaust end.

[0029] Furthermore, such as Figure 4As shown, the through-hole gasket 7 is designed with a platform-shaped structure, which can fit tightly against the inner wall of the exhaust port 2. A fitting cover 14 is added between the through-hole gasket 7 and the gasket plate 8, with its opening end on the same side as the connecting seat 6, and a limiting strip 15 on its inner side. When the sealing gasket 4 is compressed, the through-hole gasket 7 first inserts into the exhaust port 2, the fitting cover 14 deforms and fits against the surface of the exhaust cavity 3, and the limiting strip 15 contacts the exhaust cavity 3, thus achieving a seal and limiting the deflection angle of the sealing gasket 4, preventing the connecting bolt 9 from loosening, improving structural stability, preventing the connecting bolt 9 from loosening with the sealing gasket 4, increasing the stability of the sealing gasket 4's protection, and achieving the anti-loosening limiting of the sealing gasket 4 against the exhaust port 2.

[0030] Secondly, such as Figure 5 As shown, in some embodiments, one end of the connecting bolt 9 may be configured as a threaded rod 21, the diameter of which is smaller than that of the middle part of the connecting bolt 9. The threaded rod 21 passes through the sealing gasket 4 and is screwed into the connecting seat 6 for fixation, limiting one end of the sealing gasket 4. The step limitation is achieved by the diameter difference, preventing the sealing gasket 4 from moving axially. Then, a hoop 22 is fitted on the outside of the connecting bolt 9. The hoop 22 can limit the other end of the sealing gasket 4, increasing the connection between the sealing gasket 4 and the connecting bolt 9, preventing the structure of the sealing gasket 4 and the connecting bolt 9 from loosening, improving the sealing stability of the protective device for the exhaust port 2, and providing effective protection for the gas control during normal operation and shutdown of the compressor.

[0031] Among them, such as Figure 3 As shown, in order to improve the protection rate of the connecting bolt 9 to the exhaust port 2, the one-way sealing seat 5 can use the fixed tube 10 fixed in the exhaust chamber 3 as the receiving end of the connecting bolt 9. The end of the connecting bolt 9 passes through the fixed tube 10. When the connecting bolt 9 slides, a port 13 for the gas in the fixed tube 10 to be discharged will be opened on the fixed tube 10. Then, a return spring 11 connected to the connecting bolt 9 is set in the fixed tube 10. Through the connection of the return spring 11 with the connecting bolt 9 and the fixed tube 10, the connecting bolt 9 and the fixed tube 10 can be elastically connected, which facilitates the elastic return of the connecting bolt 9.

[0032] To increase the sliding stability of the connecting bolt 9 on the fixed pipe 10, such as Figure 6 and 7 As shown, a positioning block 16 can be set in the middle of the connecting bolt 9, and a through groove 18 for the positioning block 16 to slide is opened inside the fixing tube 10. The through groove 18 is designed as a "cylindrical groove + vertical cuboid groove" near the end to prevent the positioning block 16 from falling out. At the same time, a sealing ring 17 is set between the fixing tube 10 and the connecting bolt 9 to seal the connecting bolt 9 and the fixing tube 10, enhance the sealing performance, and increase the stability of the protection device exhaust port 2.

[0033] In some embodiments, a slot for the connecting bolt 9 to pass through can be opened in the fixed tube 10, and a pressure equalization chamber 19 can be opened inside the fixed tube 10 to facilitate the connection bolt 9 to pass through and divide the pressure. The pressure equalization chamber 19 is connected to the slot by a through hole 20, which ensures the stable expansion and contraction of the connecting bolt 9, prevents the high pressure of the gas in the slot from blocking it, enhances the rapid sealing protection of the exhaust port 2 by the protection device, and improves the smooth sealing when the protection device is stopped.

[0034] Of course, the above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A high-pressure gas backflow protection device for preventing compressor shutdown, comprising a compressor body (1), wherein the compressor body (1) has a through-connected exhaust port (2) and exhaust chamber (3), characterized in that: The exhaust chamber (3) is provided with a one-way sealing seat (5), and a connecting bolt (9) is slidably provided at one end of the one-way sealing seat (5). A sealing gasket (4) for sealing the exhaust port (2) is provided at the end of the connecting bolt (9). The sealing gasket (4) and the one-way sealing seat (5) are fitted with the same fitting spring (12) for the compressor high-pressure gas anti-reverse protection.

2. The high-pressure gas backflow protection device as described in claim 1, characterized in that, The sealing gasket (4) includes a connecting seat (6) that is connected through the connecting bolt (9). A through gasket (7) that fits into the exhaust port (2) is provided on one side of the connecting seat (6). A gasket (8) that fits into the exhaust chamber (3) is provided on one side of the through gasket (7) for sealing the exhaust port (2).

3. The high-pressure gas backflow protection device as described in claim 2, characterized in that, The through-hole pad (7) has a platform-shaped structure. The through-hole pad (7) and the exhaust port (2) are distributed through each other. A fitting cover (14) is provided between the through-hole pad (7) and the pad plate (8). The opening end of the fitting cover (14) is provided on the same side as the connecting seat (6). Several limiting strips (15) are provided on the inner side of the fitting cover (14) for preventing the sealing gasket (4) from loosening the exhaust port (2).

4. The high-pressure gas backflow protection device as described in claim 2, characterized in that, One end of the connecting bolt (9) is provided with a threaded rod (21) that passes through the sealing gasket (4), and the outside of the connecting bolt (9) is fitted with a hoop (22) that limits the position of the gasket (8), thereby increasing the connection between the sealing gasket (4) and the connecting bolt (9).

5. The high-pressure gas backflow protection device as described in claim 1, characterized in that, The one-way sealing seat (5) includes a fixed tube (10) fixed in the exhaust chamber (3), and the connecting bolt (9) passes through the fixed tube (10). The fixed tube (10) has an opening (13), and a return spring (11) connected to the connecting bolt (9) is provided in the fixed tube (10) for the elastic return of the connecting bolt (9).

6. The high-pressure gas backflow protection device as described in claim 5, characterized in that, A positioning block (16) is provided in the middle of the connecting bolt (9), and a through groove (18) is provided inside the fixing tube (10) for the positioning block (16) to slide. The same sealing ring (17) is provided between the fixing tube (10) and the connecting bolt (9).

7. The high-pressure gas backflow protection device as described in claim 6, characterized in that, The fixed tube (10) has a slot through which the connecting bolt (9) passes. The fixed tube (10) has a pressure equalization chamber (19) inside, and a through hole (20) is provided between the pressure equalization chamber (19) and the slot for connection, which is used to ensure stable sealing when the device is stopped.

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