A compressor check valve

Abstract

This utility model provides a compressor check valve, including a valve body disposed within the compressor, a valve seat fixedly connected within the valve body, and a plurality of first channels extending through the valve seat; a first valve plate and a second valve plate are movably connected to one side of the first channels; the first valve plate has a plurality of first covering portions, which cooperate with the valve seat to close the first channels when the valve is closed, and the first valve plate also has a plurality of second channels; the second valve plate is disposed on the side of the first valve plate away from the valve seat, and the second valve plate has a plurality of second covering portions, which cooperate with the first valve plate to close the second channels when the valve is closed, and the first valve plate also has a plurality of second channels; the second valve plate also has a plurality of third channels.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to a compressor check valve. Background Technology

[0002] Compressors are key pieces of equipment widely used in various industrial and civil fields such as refrigeration, air conditioning, and pneumatic systems. Their core function is to compress gaseous media. In compressor systems, check valves play a crucial role. They are used to prevent gaseous or liquid media on the high-pressure side from flowing back to the low-pressure side or suction chamber of the compressor when it stops running, thereby protecting the compressor from backflow, preventing media loss, and ensuring that the system can restart stably and efficiently.

[0003] Currently, there are many types of compressor check valves available, such as spring-loaded disc check valves, lift check valves, and swing check valves. While these check valves can achieve unidirectional flow control to a certain extent, they often have inherent defects in practical applications, affecting their performance and reliability. Traditional check valves typically rely on a single sealing surface for sealing. During long-term operation or when impurities are present in the medium, this can lead to incomplete sealing and internal leakage. This leakage not only reduces the compressor's efficiency and the overall system performance but can also cause frequent compressor starts, increasing energy consumption. The requirements for sealing performance are even more stringent under conditions requiring high pressure differentials or high cleanliness. Utility Model Content

[0004] This utility model provides a compressor check valve, the purpose of which is to solve the technical problem of insufficient sealing performance of check valves in the prior art.

[0005] This utility model provides a compressor check valve, including a valve body disposed within the compressor, a valve seat fixedly connected to the valve body, and a plurality of first channels extending through the valve seat; a check valve plate assembly is movably connected to one side of each of the first channels, the check valve plate assembly being used to close each of the first channels when the fluid reverses direction, the check valve plate assembly including a first valve plate and a second valve plate: The first valve plate is provided with a plurality of first covering portions, which are used to cooperate with the valve seat to close the first channel when the valve is closed. The first valve plate is also provided with a plurality of second channels. The second valve plate is disposed on the side of the first valve plate away from the valve seat. The second valve plate is provided with a plurality of second covering portions, which are used to cooperate with the first valve plate to close the second channel when the valve is closed. The first valve plate is also provided with a plurality of second channels; the second valve plate is also provided with a plurality of third channels.

[0006] Furthermore, the first channel and the second channel are staggered, and the third channel is staggered with the second channel; the first channel, the second channel, and the third channel form a multi-level ring array structure, with each second channel spaced apart from each first coverage portion.

[0007] Furthermore, a support column is fixedly connected to the side of the valve seat facing the first valve piece, the first valve piece and the second valve piece are slidably disposed on the support column, and a limit block is fixedly connected to the end of the support column away from the valve seat.

[0008] Furthermore, the second valve plate is circumferentially fixedly connected with multiple limiting pins, the first valve plate is provided with multiple first limiting pin holes that cooperate with the limiting pins, and the valve seat is provided with second limiting pin holes for limiting the swaying of the first valve plate and the second valve plate. The limiting pins slide through the first limiting pin holes and slidely connect with the second limiting pin holes.

[0009] Furthermore, the support column is provided with several sliding grooves, and the first valve plate and the second valve plate are provided with through holes at their centers. A slider is provided in the through hole, and the support column passes through the slider and is slidably connected to the slider.

[0010] Furthermore, a plurality of first elastic elements are fixedly connected to the side of the second valve plate facing the first valve plate, and the first elastic elements are used to abut against the second valve plate.

[0011] Furthermore, each of the first covering portions is fixedly connected with a second elastic element, each of the second elastic elements is disposed facing the first channel, the vertical cross section of the second elastic element is an isosceles trapezoid, and the narrower side of the second elastic element faces the first channel.

[0012] This utility model has at least the following beneficial effects: This invention provides a compressor check valve. When the liquid flows in the forward direction, it passes through the first channel, pushes each first cover portion, then through each second channel, and finally pushes the second cover portion through the third channel. When the liquid flows in the reverse direction, it pushes the second cover portion and moves the second valve plate into the third channel, then pushes the first cover portion to cover the first channel, achieving a check valve effect. The multi-layer valve plate and cover portion design forms a multi-stage seal, improving the sealing reliability during reverse flow and reducing the leakage risk that may exist on a single sealing surface. The gap between the two valve plates and the step-by-step opening or closing process provide a certain buffering effect against fluid impact, reducing water hammer effect. During forward flow, the valve plates open step by step; during reverse flow, the valve plates close step by step, making the flow more stable and reducing pressure fluctuations. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a compressor check valve according to the present invention; Figure 2 This is a cross-sectional view of the valve core of a compressor check valve according to the present invention. Figure 3 This is an exploded view of the valve core of a compressor check valve according to the present invention. Figure 4 This is an exploded view of the support column and through hole of a compressor check valve according to the present invention. In the diagram: 1. Valve body; 2. Valve seat; 3. Check valve plate assembly; 4. First valve plate; 5. Second valve plate; 6. First channel; 7. Support column; 8. Through hole; 9. Second channel; 10. Third channel; 11. First cover; 12. Second cover; 13. Limiting block; 15. Limiting pin; 16. First limiting pin hole; 17. Second limiting pin hole; 18. First elastic block; 19. Second elastic element; 21. Slide groove; 22. Slider. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4This utility model provides a compressor check valve, including a valve body 1 and a valve core disposed within the compressor. The valve core is disposed within the valve body, and the valve body 1 has a cylindrical cavity for liquid flow. The valve core is cylindrical and includes a valve seat 2 and a check valve plate assembly 3. The valve seat 2 is fixedly connected to the valve body 1, and the outer ring of the valve seat 2 abuts against the inner ring of the valve body 1. The outer ring of the valve seat 2 and the inner ring of the valve body 1 are interference-fitted. The valve seat 2 has a plurality of first channels 6 axially, and a support column 7 is fixedly connected to the center of the valve seat 2. The support column 7 is fixedly connected to a limiting block 13 at one end away from the valve seat 2. The support column 7 faces the check valve plate assembly 3. The check valve plate assembly 3 has a through hole 8 at its center, which matches the support column 7. The check valve plate assembly 3 is slidably mounted on the support column 7. The limiting platform is fixedly connected to one end of the support column 7 away from the valve seat 2 to restrict the movement path of the check valve plate assembly 3. When the liquid flows back, the liquid pushes the check valve plate assembly 3 toward the valve seat 2. When the check valve plate assembly 3 abuts against the valve seat 2, it is sealed to each first channel 6 on the valve seat 2. When the liquid moves forward, it passes through the first channel 6 of the valve seat 2, pushing the check valve plate assembly 3 away from the valve seat 2 and then through the check valve plate assembly 3.

[0016] In an embodiment of this utility model, the check valve assembly 3 includes a first valve plate 4 and a second valve plate 5, with a gap between the first valve plate 4 and the second valve plate 5; the first valve plate 4 is disposed close to the valve seat 2, and the second valve plate 5 is disposed away from the valve seat 2; the first valve plate 4 and the second valve plate 5 are slidably disposed on the support column 7; the first valve plate 4 has a plurality of second channels 9, and the second valve plate 5 has a plurality of third channels 10; each first channel 6 on the valve seat 2 has a plurality of first covering portions 11 at each projection position on the first valve plate 4; each second channel 9 of the first valve plate 4 has a plurality of second covering portions 12 at each projection position on the second valve plate 5; each first covering portion 11 is used to seal and connect the corresponding first channel 6. The axes of the first valve plate 4, the second valve plate 5, and the valve seat 2 are on the same straight line. When the liquid flows in the forward direction, it passes through the first channel 6, pushes each first cover 11, then through each second channel 9, and finally pushes the second cover 12 through the third channel 10. When the liquid flows in the reverse direction, it pushes the second cover 12 and moves the second valve plate 5 into the third channel 10, then pushes the first cover 11 to cover the first channel 6, achieving a check valve effect. The multi-layer valve plate and cover design forms a multi-stage seal, improving the sealing reliability during reverse flow and reducing the leakage risk that may exist on a single sealing surface. The gap between the two valve plates and the step-by-step opening or closing process buffer the fluid impact and reduce the water hammer effect. During forward flow, the valve plates open step by step, and during reverse flow, the valve plates close step by step, making the flow more stable and reducing pressure fluctuations.

[0017] As an optional embodiment, each of the first channels 6 is arranged in a multi-level annular array to form multiple concentric circles, and the vertical cross-section of each of the first channels 6 is part of an annulus; each of the second channels 9 is arranged in a multi-level annular array to form multiple concentric circles, and the vertical cross-section of each of the second channels 9 is part of an annulus; each of the third channels 10 is arranged in a multi-level annular array to form multiple concentric circles, and the vertical cross-section of each of the third channels 10 is part of an annulus. The annular channels allow the liquid to flow relatively smoothly and parallel to the inner wall of the valve body 1 and other water flows when flowing out of the first channel 6, second channel 9, or third channel 10, reducing the generation of turbulence.

[0018] As an optional embodiment, each of the first cover portions 11 is arranged in a multi-level annular array to form multiple concentric circles, and the vertical cross-section of each of the first cover portions 11 is a part of an annulus; each of the second cover portions 12 is arranged in a multi-level annular array to form multiple concentric circles, and the vertical cross-section of each of the second cover portions 12 is a part of an annulus. The first cover portions 11 and the second cover portions 12 are matched with the shapes of the first channel 6 and the second channel 9 to avoid sealing failure.

[0019] As an example of implementation, the width of the first covering portion 11 is greater than the width of the first channel 6, thereby improving the covering capacity and avoiding the sealing effect during the sealing check.

[0020] In an embodiment of this utility model, each of the first channels 6, each of the second channels 9, and each of the third channels 10 are staggered. The valve plate between each radially adjacent second channel 9 is the first covering part 11, and the valve plate between each radially adjacent third channel 10 is the second covering part 12.

[0021] In an embodiment of this utility model, the support shaft is provided with external threads, and bearings 14 are provided in the through holes 8 of the first valve plate 4 and the second valve plate 5. The inner ring of the bearing 14 is provided with internal threads, and the inner ring of each bearing 14 is slidably disposed on the support column 7 through the threads. The outer ring of the bearing 14 is fixedly connected to the inner ring of the through hole 8. This ensures that the first valve plate 4 and the second valve plate 5 slide relatively smoothly, and when the liquid flows in reverse and turbulence occurs, the first valve plate 4 and the second valve plate 5, which are threadedly connected to the support column 7, can reduce the occurrence of tilting movement, avoid jamming of the first valve plate 4 and the second valve plate 5, and prevent the first valve plate 4 from abutting against the valve seat 2 on one side and having a gap with the valve seat 2 on the other side, which would cause the check valve to fail.

[0022] As an optional embodiment, a plurality of limiting pins 15 are provided on the circumference of the second valve plate 5. Each limiting pin 15 of the second valve plate 5 has a first limiting pin hole 16 at the projection position of the first valve plate 4, and each limiting pin 15 of the second valve plate 5 has a second limiting pin hole 17 at the projection position of the valve seat 2. The limiting pins 15 extend toward the valve seat 2 and slide within the first limiting pin hole 16 and the second limiting pin hole 17, thereby further restricting the rotation of the second valve plate 5 and the first valve plate 4.

[0023] As an implementable example, the second valve plate 5 has a plurality of first elastic blocks 18 on the side facing the first valve plate 4. The first elastic blocks 18 are used to abut against the second valve plate 5. The second valve plate 5 has a plurality of elastic block guide grooves for receiving the first elastic blocks 18. When the second valve plate 5 is engaged with the first valve plate 4, the first elastic blocks 18 provide cushioning when the second valve plate 5 moves relative to the first valve plate 4, and will not cause the second cover 12 to fail and be unable to close the second channel 9. The elastic block guide grooves are clearance-fitted with the first elastic blocks 18 to prevent the first valve plate 4 and the second valve plate 5 from being unable to separate. Each first cover 11 has a second elastic block 19 facing the first channel 6. The vertical cross-section of the second elastic block 19 is an isosceles trapezoid, and the second elastic block 19 is used to block the first channel 6.

[0024] In one possible implementation for practical use, the sum of the length of the second limiting hole, the thickness of the first valve plate 4, and the length of the first elastic block 18 is slightly greater than the length of the limiting pin 15. The length of the limiting pin 15 is greater than the sum of the thickness of the first valve plate 4 and the length of the first elastic block 18. The length of the support column 7 is less than the sum of the thickness of the first valve plate 4, the thickness of the second valve plate 5, the length of the limiting pin 15, and the length of the first elastic block 18. The length of the limiting pin 15 ensures that the limiting pin 15 will not disengage from the second limiting hole.

[0025] As an optional embodiment, the first support column 7 is polygonal, and each of the through holes 8 matches the first support column 7. Specifically, the first support column 7 is a long cube, and a groove 21 is opened on each of the four longer sides of the first support column 7. Four sliders 22 are designed in the through holes 8, and each slider 22 is slidably disposed in each of the grooves 21.

Claims

1. A compressor check valve, comprising a valve body (1) disposed within the compressor, characterized in that, A valve seat (2) is fixedly connected inside the valve body (1), and a plurality of first channels (6) are opened through the valve seat (2); a check valve plate group (3) is movably connected to one side of the first channel (6), and the check valve plate group (3) is used to close each first channel (6) when the fluid reverses. The check valve plate group (3) includes a first valve plate (4) and a second valve plate (5): The first valve plate (4) is provided with a plurality of first covering parts (11), which are used to cooperate with the valve seat (2) to close the first channel (6) when the valve is closed. The first valve plate (4) is also provided with a plurality of second channels (9). The second valve plate (5) is disposed on the side of the first valve plate (4) away from the valve seat (2). The second valve plate (5) is provided with a plurality of second covering parts (12). The second covering parts (12) are used to cooperate with the first valve plate (4) to close the second channel (9) when the valve is closed. The second valve plate (5) is also provided with a plurality of third channels (10).

2. The compressor check valve according to claim 1, characterized in that, The first channel (6) is offset from the second channel (9), and the third channel (10) is offset from the second channel (9); the first channel (6), the second channel (9), and the third channel (10) are multi-level ring array structures, and each second channel (9) is spaced apart from each first covering part (11).

3. The compressor check valve according to claim 1, characterized in that, A support column (7) is fixedly connected to the side of the valve seat (2) facing the first valve plate (4). The first valve plate (4) and the second valve plate (5) are slidably disposed on the support column (7). A limit block (13) is fixedly connected to the end of the support column (7) away from the valve seat (2).

4. The compressor check valve according to claim 3, characterized in that, The second valve plate (5) is circumferentially fixedly connected with multiple limiting pins (15). The first valve plate (4) is provided with multiple first limiting pin holes (16) that cooperate with the limiting pins (15). The valve seat (2) is provided with a second limiting pin hole (17) for limiting the swaying of the first valve plate (4) and the second valve plate (5). The limiting pin (15) slides through the first limiting pin hole (16) and slides to connect with the second limiting pin hole (17).

5. The compressor check valve according to claim 3, characterized in that, The support column (7) has several sliding grooves (21), and the first valve plate (4) and the second valve plate (5) have through holes (8) in their centers. A slider (22) is provided in the through hole (8), and the support column (7) passes through the slider (22) and is slidably connected to the slider (22).

6. The compressor check valve according to claim 1, characterized in that, The second valve plate (5) has a plurality of first elastic elements fixedly connected to the side facing the first valve plate (4), and the first elastic elements are used to abut against the second valve plate (5).

7. The compressor check valve according to claim 1, characterized in that, Each of the first covering portions (11) is fixedly connected with a second elastic member. Each second elastic member is positioned facing the first channel (6). The vertical cross section of the second elastic member (19) is an isosceles trapezoid, and the narrower side of the second elastic member (19) faces the first channel (6).

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