A high pressure gas pump

Abstract

The application provides a high-pressure gas pump, and belongs to the technical field of gas compression devices. The high-pressure gas pump comprises a cylinder body, a first-stage piston is slidably arranged in the cylinder body, the axial middle part of the first-stage piston is hinged to a driving part through a piston pin, the first-stage piston divides the space in the cylinder body into a first-stage cylinder and a second-stage cylinder, and the end of the first-stage cylinder away from the second-stage cylinder is provided with a third-stage cylinder. During operation, the first-stage cylinder acts, synchronously drives the second-stage cylinder and the third-stage cylinder at the two ends of the first-stage cylinder to act synchronously, and the first-stage cylinder is balanced under the combined action of the second-stage cylinder and the third-stage cylinder at the two ends. The first-stage cylinder and the second-stage cylinder are unidirectionally communicated, the second-stage cylinder and the third-stage cylinder are unidirectionally communicated, and after external gas enters the cylinder body from the first-stage cylinder, the external gas is sequentially compressed and pressurized by the second-stage cylinder and the third-stage cylinder and then discharged. The first-stage piston in the high-pressure gas pump is balanced under force, is not prone to wear and tear, and facilitates independent heat dissipation of all the cylinders, and the use performance is improved.

Description

Technical Field

[0001] This application belongs to the technical field of gas compression devices, specifically relating to a high-pressure gas pump. Background Technology

[0002] High-pressure air pumps are widely used in daily production and life as air compression equipment. They are usually divided into single-stage and multi-stage. The higher the number of stages, the greater the pressure boosting efficiency.

[0003] The existing three-stage high-pressure pump uses a composite cylinder block with the three stages nested together. That is, the third-stage cylinder (or high-pressure cylinder) is located on the innermost side, so that the volume of the three cylinders decreases sequentially to achieve the purpose of progressively increasing pressure. In this type of high-pressure pump, because the cylinders are nested together, the pistons in the three-stage cylinders are also coaxial composite structures. That is, the piston in the first-stage cylinder is located on the outermost side, and then the second-stage piston and the third-stage piston are installed sequentially from the outside in.

[0004] The existing high-pressure air pumps have the following technical problems with this structural arrangement:

[0005] (1) Because the three-stage cylinders are installed in a compound manner, the pistons in the second and third stage cylinders are located on one side of the first stage piston. When the first stage piston is driven to move, the force is concentrated at one end of the first stage piston, which causes the piston to be unbalanced during the movement and is prone to radial tilting and shaking. Therefore, the piston and the sealing components on the piston are easily worn.

[0006] (2) In addition, since the third-stage high-pressure cylinder is located on the innermost side, the heat dissipation components are usually located on the outside of the first-stage cylinder, resulting in the third-stage cylinder, which needs the most heat dissipation, having the worst heat dissipation effect.

[0007] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0008] The purpose of this application is to provide a high-pressure air pump that balances the force on the first-stage piston, reduces wear, facilitates individual heat dissipation for all cylinders, and improves performance.

[0009] To achieve the above objectives, the high-pressure air pump of this application provides the following technical solution:

[0010] A high-pressure air pump includes a cylinder body, in which a primary piston is slidably disposed, and the central part of the primary piston is hinged to a drive unit via a piston pin.

[0011] The first-stage piston divides the internal space of the cylinder into a first-stage cylinder and a second-stage cylinder. A third-stage cylinder is located at the end of the first-stage cylinder furthest from the second-stage cylinder. During operation, the first-stage cylinder actuates, synchronously driving the second-stage and third-stage cylinders at both ends of the first-stage cylinder to actuate synchronously. The first-stage cylinder is balanced by the combined action of the second-stage and third-stage cylinders at both ends. The first-stage cylinder and the second-stage cylinder are connected in one direction only, and the second-stage cylinder and the third-stage cylinder are connected in one direction only. After the external gas enters the cylinder body through the first-stage cylinder, it is compressed and pressurized in sequence through the second-stage and third-stage cylinders before being discharged.

[0012] As a further optimized technical solution, an intake channel is provided through both ends of the first-stage piston, and a second one-way valve is provided in the intake channel. The first-stage cylinder is connected to the second-stage cylinder in one direction through the second one-way valve.

[0013] As a further optimized technical solution, the cylinder body is also equipped with:

[0014] An isolating seat is disposed on the side of the first-stage piston facing the first-stage cylinder and is fixedly connected to the cylinder body;

[0015] The third-stage cylinder is mounted on the isolation seat.

[0016] As a further optimized technical solution, it also includes:

[0017] A sleeve, which is fixedly installed on one side of the isolation seat;

[0018] A high-pressure piston tube, one end of which is fixed to a first-stage piston, and the other end is provided with a piston structure that extends into a sleeve and reciprocates relative to the sleeve along the axial direction.

[0019] The internal space of the sleeve and the space defined by the top of the high-pressure piston tube are connected to the second-stage cylinder through the high-pressure piston tube.

[0020] As a further optimized technical solution, a cylinder seat is provided at the end of the cylinder block away from the second-stage cylinder, and the sleeve is provided between the isolation seat and the cylinder seat.

[0021] As a further optimized technical solution, the isolation seat is provided with an air inlet that connects to the outside, and the air inlet is unidirectionally connected to the first-stage cylinder.

[0022] As a further optimized technical solution, exhaust channels are provided through both ends of the first-stage piston. The exhaust channels connect the inner cavity of the high-pressure piston tube with the second-stage cylinder. A third one-way valve is provided in the exhaust channels, and the second-stage cylinder is unidirectionally connected to the third-stage cylinder through the third one-way valve.

[0023] As a further optimized technical solution, a cooling mechanism is also included, which delivers a cooling medium to the outside of the third-stage cylinder. The cooling mechanism includes a cooling chamber that contains the cooling medium, and at least a portion of the third-stage cylinder is located in the cooling chamber.

[0024] As a further optimized technical solution, the space defined by the top wall of the isolation seat, the bottom wall of the cylinder seat, the outer wall of the sleeve, and the inner wall of the cylinder constitutes the cooling chamber.

[0025] As a further optimized technical solution, the isolation seat is provided with a first channel connecting to the cooling chamber, and the cylinder seat is provided with a second channel connecting to the cooling chamber. The first channel and the second channel are used to connect to an external cold source so that the cooling medium circulates between the cooling chamber and the external cold source.

[0026] Beneficial effects: In this application, by arranging cylinders at both ends of the first-stage cylinder, the first-stage cylinder is located in the middle of all cylinders, and all cylinders in the cylinder body are arranged sequentially along the axial extension direction. In this way, when the piston of the first-stage cylinder moves axially, the cylinders at both ends of the first-stage cylinder move synchronously. At this time, compared with the prior art, the piston of the first-stage cylinder in this application is subjected to force at both ends, so the force is more balanced, reducing the radial tilting sway amplitude and extending the service life of the piston. In addition, the axial arrangement of all cylinders in the cylinder body is conducive to the individual heat dissipation of each cylinder. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:

[0028] Figure 1 This is a schematic diagram of the internal structure of a high-pressure air pump according to an embodiment of this application in one direction;

[0029] Figure 2 This is a schematic diagram of the internal structure of a high-pressure air pump according to one embodiment of this application, taken from another direction.

[0030] Figure 3 for Figure 2 A schematic diagram of the structure of part A.

[0031] In the diagram: 1. Cylinder block; 2. First-stage cylinder; 3. Third-stage cylinder; 4. Second-stage cylinder; 5. First-stage piston; 501. Piston pin; 6. Isolator seat; 7. Cylinder seat; 8. Sleeve; 9. High-pressure piston tube; 10. Inlet port; 11. High-pressure valve core; 1101. Airflow passage; 1102. Perforation; 1103. Coil spring; 12. First check valve; 13. Inlet passage; 14. Second check valve; 15. Exhaust passage; 16. Third check valve; 17. Third-stage piston; 18. Sealing ring; 19. Cylinder liner; 20. Cooling chamber; 21. First channel; 22. Second channel; 23. Exhaust port; 24. Fourth check valve; 25. Support box; 26. Rotation drive source; 27. Crankshaft; 28. Connecting rod; 29. ​​Connecting seat; 30. Piston ring. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art are within the scope of protection of this application.

[0033] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require this application to be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected" and "linked" used in this application should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0034] The present application will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present application can be combined with each other.

[0035] This application provides a high-pressure air pump. By arranging all the cylinders axially and placing the first-stage cylinder 2 in the middle of all the cylinders, the piston of the first-stage cylinder 2 is subjected to balanced forces at both ends during piston movement, reducing wear on the piston. In addition, the heat dissipation of each cylinder does not affect each other, thus enhancing the heat dissipation effect.

[0036] Example 1

[0037] like Figure 1 , Figure 2As shown, the high-pressure air pump includes a cylindrical cylinder 1 with a cylinder seat 7 fixedly mounted on the top of the cylinder 1 to seal the top of the cylinder 1. A primary piston 5 is installed inside the cylinder 1, and the primary piston 5 is in a sealing sliding fit with the inner sidewall of the cylinder 1. A drive unit for driving the primary piston 5 to reciprocate along the axial direction of the cylinder 1 is installed at the bottom of the cylinder 1. In this embodiment, the drive unit has a support box 25, the top of which is fixedly mounted on the bottom of the cylinder 1 via a connecting seat 29. A motor is fixedly mounted on one side of the support box 25 as a rotation drive source 26. The output shaft of the motor extends into the support box 25, and a crankshaft 27 is fixedly mounted on the output shaft of the motor. A connecting rod 28 is hinged to the lever arm of the crankshaft 27, and the other end of the connecting rod 28 is hinged to the middle of the primary piston 5 axially via a piston pin 501. Thus, when the motor rotates, the motor ultimately drives the primary piston 5 to reciprocate axially within the cylinder 1 via the crankshaft 27 and the connecting rod 28. It should be noted that the first-stage piston 5 has a cylindrical body with multiple annular grooves coaxially formed on its outer side. Each annular groove is fixedly connected to a piston ring 30, allowing the first-stage piston 5 to slide and seal against the inner wall of the cylinder 1 through the piston rings 30. In other words, the first-stage piston 5 is a combined piston structure with piston function.

[0038] An isolating seat 6 is fixedly installed inside the cylinder body 1, above the first-stage piston 5 and below the cylinder seat 7. The isolating seat 6 axially divides the space above the first-stage piston 5 into two parts. A sleeve 8 is fixedly installed between the isolating seat 6 and the cylinder seat 7, and the sleeve 8 is arranged axially along the cylinder body 1. A high-pressure piston tube 9 is arranged axially and reciprocates relative to the sleeve 8. The end of the high-pressure piston tube 9 away from the sleeve 8 is fixedly connected to the first-stage piston 5. It should be noted that the high-pressure piston tube 9 in this application is a tubular structure with a gas passage for gas to pass through. A third-stage piston 17 is provided on the end of the high-pressure piston tube 9 that extends into the sleeve 8 as a piston structure for sliding engagement with the inner wall of the sleeve 8.

[0039] The space defined by the top of the first-stage piston 5, the bottom of the isolation seat 6, and the inner wall of the cylinder body 1 constitutes the first-stage cylinder 2. The space defined by the bottom of the first-stage piston 5, the bottom of the cylinder body 1, and the inner wall of the cylinder body 1 constitutes the second-stage cylinder 4. The space defined by the internal space of the sleeve 8 and the top of the high-pressure piston tube 9 constitutes the third-stage cylinder 3. The first-stage cylinder 2 and the second-stage cylinder 4 are connected in one direction, and the second-stage cylinder 4 and the third-stage cylinder 3 are connected in one direction. After the external gas enters the cylinder body 1 from the first-stage cylinder 2, it is compressed and pressurized in sequence through the second-stage cylinder 4 and the third-stage cylinder 3 before being discharged.

[0040] To ensure the sealing of the bottom of the second-stage cylinder 4, a cylinder liner 19 is fixedly connected to the bottom of the first-stage piston 5. The cylinder liner 19 is in sliding fit with the connecting seat 29. A sealing ring 18 is fixedly connected to the inner wall of the connecting seat 29 in sliding fit with the cylinder liner 19. The outer wall of the cylinder liner 19 is in sliding sealing fit with the connecting seat 29 at the bottom of the cylinder body 1 through the sealing ring 18.

[0041] In addition, a three-stage piston 17 is fixedly connected to the top of the high-pressure piston tube 9, that is, the high-pressure piston tube 9 slides and seals with the sleeve 8 through the three-stage piston 17.

[0042] Therefore, in this application, the third-stage cylinder 3 is located at the top of the first-stage cylinder 2, and the second-stage cylinder 4 is located at the bottom of the first-stage cylinder 2. The third-stage cylinder 3, the first-stage cylinder 2, and the second-stage cylinder 4 are arranged in the cylinder body 1 along the axial extension direction. The first-stage cylinder 2 is positioned between the second-stage cylinder 4 and the third-stage cylinder 3, that is, in the middle of all the cylinders. At the same time, the piston of the third-stage cylinder 3 (i.e., the third-stage piston 17) is located at the top of the first-stage cylinder 2, and the piston of the second-stage cylinder 4 (i.e., the sealing ring 18) is located at the bottom of the first-stage cylinder 2. When the first-stage piston 5 of the first-stage cylinder 2 reciprocates axially, the third-stage pistons 17 at both ends of the first-stage piston 5 move axially synchronously with the cylinder liner 19, making it easier for the first-stage piston 5 to be balanced by forces. Furthermore, the middle part of the first-stage piston 5 is hinged to the connecting rod 28 via the piston pin 501. During the axial reciprocating motion of the first-stage piston 5 within the cylinder body 1, the radial tilting and wobbling amplitude of the first-stage piston 5 can be reduced, thereby reducing wear and extending the piston's service life. In addition, the arrangement of all cylinders within the cylinder body 1 along the axial direction of the cylinder body 1 facilitates the installation of cooling components on the outside of the cylinder body 1 to individually cool each stage of the cylinder. The cooling between cylinders does not affect each other, thus promoting individual heat dissipation for each cylinder.

[0043] Furthermore, the isolation seat 6 is provided with an air inlet 10 that connects to the outside. A first one-way valve 12 is installed inside the air inlet 10, and the air inlet 10 is connected to the first-stage cylinder 2 in one direction through the first one-way valve 12. This allows for one-way air intake of the first-stage cylinder 2, ensuring the compression effect of the first-stage cylinder 2.

[0044] An intake passage 13 is provided through both ends of the first-stage piston 5. A second one-way valve 14 is provided in the intake passage 13. The first-stage cylinder 2 is connected to the second-stage cylinder 4 in one direction through the second one-way valve 14. When the first-stage cylinder 2 is compressed, the gas in the first-stage cylinder 2 flows into the second-stage cylinder 4 in one direction through the intake passage 13.

[0045] The first-stage piston 5 has exhaust channels 15 extending through both ends. These exhaust channels 15 connect the inner cavity of the high-pressure piston tube 9 to the second-stage cylinder 4. A third one-way valve 16 is installed within the exhaust channels 15, allowing the second-stage cylinder 4 to communicate unidirectionally with the third-stage cylinder 3 via the third one-way valve 16. Specifically, when the second-stage cylinder 4 is compressed, the gas inside it enters the gas passage of the high-pressure piston tube 9 unidirectionally through the exhaust channels 15. A high-pressure valve core 11 is installed on the third-stage piston 17 at the top of the high-pressure piston tube 9. The structure of the high-pressure valve core 11 is as follows: Figure 3 As shown, the high-pressure valve core 11 has an overall T-shaped structure and an axial airflow channel 1101 that connects to the airflow passage of the high-pressure piston tube 9. A through-hole 1102 is formed on the side wall of the airflow channel 1101. The high-pressure valve core 11 is slidably connected to the third-stage piston 17 via a helical spring 1103, and is used to open or seal the cavity of the high-pressure piston tube 9. When the high-pressure piston tube 9 moves downward, the gas entering the high-pressure piston tube 9 from the second-stage cylinder 4 enters the airflow channel 1101 and pushes the high-pressure valve core 11 upward through the through-hole 1102 into the third-stage cylinder 3. When the high-pressure piston tube 9 moves upward, under the action of the helical spring 1103 and the gas in the third-stage cylinder 3, the high-pressure valve core 11 is pushed to seal the top of the cavity of the high-pressure piston tube 9, thereby allowing the gas in the third-stage cylinder 3 to be smoothly discharged.

[0046] Furthermore, the exhaust port 23 of the high-pressure air pump is located on the cylinder seat 7, and the exhaust port 23 is connected to the top of the third-stage cylinder 3 to discharge the compressed high-pressure gas.

[0047] To ensure effective exhaust, a fourth one-way valve 24 is installed inside the exhaust port 23 for one-way discharge of high-pressure gas.

[0048] Furthermore, in order to improve the heat dissipation effect of the air pump, the high-pressure air pump also includes a cooling mechanism, which delivers a cooling medium to the outside of the third-stage cylinder 3.

[0049] In this embodiment, the cooling mechanism includes a cooling chamber 20 that contains a cooling medium, and at least a portion of the third-stage cylinder 3 is located within the cooling chamber 20. Specifically, the space defined by the top wall of the isolation seat 6, the bottom wall of the cylinder seat 7, the outer wall of the sleeve 8, and the inner wall of the cylinder body 1 constitutes the cooling chamber 20. The cooling chamber 20 is used to fill with a cooling medium to cool the third-stage cylinder 3. This ensures that the third-stage cylinder 3, which has the highest pressure and requires the most cooling, is adequately cooled, thereby ensuring the stability of the high-pressure air pump's operating state.

[0050] Furthermore, the isolation seat 6 is provided with a first channel 21 connecting to the cooling chamber 20, and the cylinder seat 7 is provided with a second channel 22 connecting to the cooling chamber 20. The first channel 21 and the second channel 22 are used to connect to an external cold source so that the cooling medium circulates between the cooling chamber 20 and the external cold source. In this embodiment, the first channel 21 is a water outlet, and the second channel 22 is a water inlet. The flowing cooling water enters the cooling chamber 20 from the water inlet and is discharged from the water outlet, thereby achieving rapid cooling of the third-stage cylinder 3.

[0051] In practical use, the drive unit pulls the first-stage piston 5 downward, increasing the volume of the first-stage cylinder 2. External gas enters the first-stage cylinder 2 through the intake port 10. Simultaneously, the second-stage cylinder 4 is compressed, and the third-stage cylinder 3 increases in volume. Gas in the second-stage cylinder 4 enters the third-stage cylinder 3 through the exhaust passage 15. When the drive unit pushes the first-stage piston 5 upward, the first-stage cylinder 2 is compressed, and gas in the first-stage cylinder 2 enters the second-stage cylinder 4 through the intake passage 13. Simultaneously, gas in the third-stage cylinder 3 is discharged through the exhaust port 23.

[0052] It is understood that the above description is merely exemplary and the embodiments of this application do not limit the scope of the application.

[0053] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application shall be within the scope of protection of the pending claims of this application.

Claims

1. A high-pressure air pump, comprising a cylinder (1), wherein a primary piston (5) is slidably disposed within the cylinder (1), characterized in that, The middle part of the first-stage piston (5) is hinged to the drive unit via a piston pin (501); The first-stage piston (5) divides the space inside the cylinder body (1) into a first-stage cylinder (2) and a second-stage cylinder (4). A third-stage cylinder (3) is provided at the end of the first-stage cylinder (2) away from the second-stage cylinder (4). When working, the first-stage cylinder (2) moves, synchronously driving the second-stage cylinder (4) and the third-stage cylinder (3) at both ends of the first-stage cylinder (2) to move synchronously. The first-stage cylinder (2) is balanced by the combined action of the second-stage cylinder (4) and the third-stage cylinder (3) at both ends. The first-stage cylinder (2) is connected to the second-stage cylinder (4) in one direction, and the second-stage cylinder (4) is connected to the third-stage cylinder (3) in one direction. After the external gas enters the cylinder body (1) through the first-stage cylinder (2), it is compressed and pressurized by the second-stage cylinder (4) and the third-stage cylinder (3) in sequence before being discharged.

2. The high-pressure air pump according to claim 1, characterized in that, The first-stage piston (5) has an intake channel (13) through both ends. A second one-way valve (14) is installed in the intake channel (13). The first-stage cylinder (2) is connected to the second-stage cylinder (4) in one direction through the second one-way valve (14).

3. The high-pressure air pump according to claim 1, characterized in that, The cylinder (1) also contains: Isolation seat (6), the isolation seat (6) is disposed on the side of the first stage piston (5) facing the first stage cylinder (2) and is fixedly connected to the cylinder body (1); The third-stage cylinder (3) is mounted on the isolation seat (6).

4. The high-pressure air pump according to claim 3, characterized in that, Also includes: Sleeve (8), the sleeve (8) is fixedly installed on one side of the isolation seat (6); High-pressure piston tube (9), one end of which is fixed on the first-stage piston (5), and the other end is provided with a piston structure and extends into the sleeve (8) and reciprocates relative to the sleeve (8) along the axial direction; The internal space of the sleeve (8) and the space defined by the top of the high-pressure piston tube (9) are connected to the second-stage cylinder (4) through the high-pressure piston tube (9).

5. The high-pressure air pump according to claim 4, characterized in that, A cylinder seat (7) is provided at one end of the cylinder body (1) away from the second-stage cylinder (4), and the sleeve (8) is provided between the isolation seat (6) and the cylinder seat (7).

6. The high-pressure air pump according to claim 3, characterized in that, The isolation seat (6) is provided with an air inlet (10) that connects to the outside, and the air inlet (10) is connected to the first stage cylinder (2) in one direction.

7. The high-pressure air pump according to claim 4, characterized in that, The first-stage piston (5) has exhaust channels (15) through both ends. The exhaust channels (15) connect the inner cavity of the high-pressure piston tube (9) with the second-stage cylinder (4). A third one-way valve (16) is provided in the exhaust channels (15). The second-stage cylinder (4) is connected to the third-stage cylinder (3) in one direction through the third one-way valve (16).

8. The high-pressure air pump according to claim 5, characterized in that, It also includes a cooling mechanism that delivers cooling medium to the outside of the third-stage cylinder (3), the cooling mechanism including a cooling chamber (20) for containing the cooling medium, at least a portion of the third-stage cylinder (3) being located in the cooling chamber (20).

9. The high-pressure air pump according to claim 8, characterized in that, The space defined by the top wall of the isolation seat (6), the bottom wall of the cylinder seat (7), the outer wall of the sleeve (8), and the inner wall of the cylinder body (1) constitutes the cooling chamber (20).

10. The high-pressure air pump according to claim 9, characterized in that, The isolation seat (6) is provided with a first channel (21) that connects to the cooling chamber (20), and the cylinder seat (7) is provided with a second channel (22) that connects to the cooling chamber (20). The first channel (21) and the second channel (22) are used to connect to an external cold source so that the cooling medium circulates between the cooling chamber (20) and the external cold source.

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