Diaphragm compressor

Abstract

The utility model discloses a diaphragm compressor which comprises a cylinder body provided with a thrust cavity; the driving assembly comprises a piston assembly movably arranged in the thrust cavity and a driving part used for driving the piston assembly to reciprocate; the cylinder body is communicated with a compression cavity of the at least one membrane head assembly through an oil pipeline; the first cooling assembly is arranged on the outer wall of the cylinder body, and the second cooling assembly is arranged on the outer side wall of the oil pipeline. According to the diaphragm compressor, the cylinder body and the diaphragm head assembly of the diaphragm compressor are designed in a split mode, so that the oil pipeline can be exposed out of the cylinder body, and therefore the diaphragm compressor can cool oil in the cylinder body through the first cooling assembly and cool a medium in the oil pipeline through the second cooling assembly; the control effect on the overall temperature of the oil liquid is improved, so that the temperature of the oil liquid is better controlled, aging of the hydraulic oil is slowed down, and the performance of the diaphragm compressor is improved.

Description

Technical Field

[0001] The present application relates to the technical field of diaphragm compression, and in particular to a diaphragm compressor. Background Art

[0002] Diaphragm compressor is a positive displacement compressor. Due to its good sealing performance, wide pressure range and large compression ratio, it is widely used in petrochemical fields such as hydrogenation stations to compress and transport various high-purity gases, precious rare gases, toxic and harmful gases, and corrosive gases.

[0003] The main body of the diaphragm compressor consists of the air-side diaphragm, the oil-side diaphragm and the diaphragm. The air-side diaphragm and the oil-side diaphragm sandwich the diaphragm and are detachably connected by a set of bolts.

[0004] Traditional diaphragm compressors compress gas using a crank-connecting rod mechanism that drives the piston, which in turn pushes hydraulic oil, forcing the diaphragm to deform. The hydraulic oil and gas are separated only by a set of metal diaphragms. During operation, the hydraulic oil is constantly compressed and expanded, and this process involves energy loss, which is converted into heat and causes the hydraulic oil to heat up. The hot hydraulic oil heats the compressed gas through the metal diaphragm, resulting in higher exhaust temperatures in the diaphragm compressor. Furthermore, excessively high hydraulic oil temperatures reduce its viscosity, increase leakage, and accelerate oil aging.

[0005] Therefore, excessively high hydraulic oil temperature will affect the normal use of the compressor. Therefore, how to suppress excessively high hydraulic oil temperature during the operation of the compressor is an urgent problem to be solved. Utility Model Content

[0006] The present application provides a diaphragm compressor to solve the technical problems of heat dissipation of diaphragm compressors and generally small flow rate of a single unit.

[0007] A diaphragm compressor comprises: a cylinder body having a thrust chamber; a drive assembly comprising a piston assembly movable in the thrust chamber and a drive member for driving the piston assembly to reciprocate; at least one diaphragm head assembly comprising a main body having a compression chamber and a diaphragm arranged in the main body, the cylinder body being connected to the compression chamber of at least one diaphragm head assembly via an oil pipeline; the drive member drives the piston assembly to reciprocate in the cylinder body to push the hydraulic oil in the cylinder body into the compression chamber through the oil pipeline, forcing the diaphragm in the diaphragm head assembly to perform reciprocating flexural deformation; the compressor also comprises a first cooling assembly and a second cooling assembly, the first cooling assembly being arranged on the outer wall of the cylinder body for heat dissipation of the cylinder body, and the second cooling assembly being arranged on the outer wall of the oil pipeline for heat dissipation of the oil pipeline.

[0008] In an embodiment of the present application, a split design is formed between the cylinder body and the diaphragm head assembly of the diaphragm compressor, which allows the oil pipeline to be exposed to the outside of the cylinder body. Therefore, the diaphragm compressor in the present application scheme can use the first cooling assembly to cool the oil in the cylinder body and use the second cooling assembly to cool the medium in the oil pipeline, which improves the control effect of the overall temperature of the oil, thereby better controlling the oil temperature, slowing down the aging of the hydraulic oil, and improving the performance of the diaphragm compressor; furthermore, due to the split design, a drive assembly can be connected to multiple diaphragm head assemblies through the oil pipeline at the same time, which enables a drive assembly to drive multiple diaphragms to perform compression work at the same time, thereby increasing the flow rate of a single diaphragm compressor and improving the overall performance of the diaphragm compressor.

[0009] As one of the optional embodiments of the present application, the first cooling component includes: a cooling chamber, which is formed by a recessed arrangement on the outer wall of the cylinder body; a closing sleeve, which is sleeved on the outer wall of the cylinder body to close the cooling chamber; wherein, the closing sleeve is provided with a liquid inlet and a liquid outlet, and both the liquid inlet and the liquid outlet are connected to the cooling chamber for the flow of cooling medium.

[0010] In an embodiment of the present application, a specific structure of a first cooling component is provided, in which a cooling cavity is directly formed by a depression in the outer wall of the cylinder body, so that the thickness of the cylinder body can be thinned while forming the cooling cavity, so that the cooling medium can better cool the oil in the cylinder body.

[0011] As one of the optional embodiments of the present application, the cylinder body is provided with stepped grooves at both ends of the closing sleeve, the two ends of the closing sleeve are embedded in the stepped grooves, and the outer wall of the closing sleeve is flush with the outer wall of the cylinder body.

[0012] In the embodiment of the present application, both ends of the closing sleeve are limited by the stepped groove along the axial direction of the cylinder body, which makes the closing sleeve more firmly fixed on the cylinder body, thereby ensuring the stability of the cooling cavity and ensuring stable cooling.

[0013] As one of the optional embodiments of the present application, the first cooling assembly also includes a sealing ring. A sealing groove is recessed on the bottom surface of the stepped groove close to the axis of the cylinder body. The sealing ring is arranged in the sealing groove. The sealing ring is used to seal between the closing sleeve and the cylinder body.

[0014] In the embodiment of the present application, the sealing ring strengthens the seal between the sealing sleeve and the stepped groove, which improves the reliability of the cooling chamber, avoids leakage of the cooling medium in the cooling chamber, and ensures the overall reliability of the diaphragm compressor.

[0015] As one of the optional embodiments of the present application, the first cooling assembly further includes a spoiler disposed in the cooling cavity.

[0016] As one of the optional embodiments of the present application, the spoiler is spirally arranged in the cooling cavity along the axis of the cylinder body, so that the cooling medium flows in a spiral shape in the cooling cavity.

[0017] As one of the optional embodiments of the present application, the liquid inlet and the liquid outlet are respectively arranged at two ends of the spoiler on the axis of the cylinder body.

[0018] In the embodiment of the present application, the setting of the spoiler allows the cooling medium to flow more fully in the cooling cavity, thereby increasing the contact time between the cooling medium and the outer wall of the cylinder body, thereby increasing the heat exchange efficiency of the cooling medium to the oil in the cylinder body.

[0019] As one of the optional embodiments of the present application, in the direction of gravity, the liquid inlet is arranged above the liquid outlet.

[0020] In the embodiment of the present application, the liquid inlet and the liquid outlet are arranged vertically along the direction of gravity, and the cooling medium can flow in the cooling cavity by gravity, which is conducive to the smooth flow of the cooling medium and does not require additional devices to drive the flow of the cooling medium.

[0021] As one of the optional embodiments of the present application, the second cooling assembly includes a cooling jacket mounted on the outer wall of the oil pipeline and sealing plates arranged at both ends of the cooling jacket. A liquid cooling cavity is formed between the cooling jacket, the sealing plate and the oil pipeline. The cooling jacket is provided with a water inlet and a water outlet connected to the liquid cooling cavity.

[0022] In the embodiment of the present application, a specific structure of a second cooling component is proposed, which is simple and convenient to process and has low cost.

[0023] As one of the optional embodiments of the present application, the piston assembly separates the thrust chamber into a first cavity and a second cavity that are independently sealed from each other. Multiple diaphragm head assemblies are provided, and the first cavity and the second cavity are respectively connected to at least one diaphragm head assembly.

[0024] In an embodiment of the present application, the first cavity and the second cavity can both be connected to at least one diaphragm head assembly, which further increases the number of diaphragm head assemblies that can be connected to a single cylinder, and when the diaphragm head assemblies connected to the first cavity and the second cavity work in opposite directions, the flow rate of a single diaphragm compressor is effectively increased.

[0025] One of the above technical solutions has the following advantages or beneficial effects: in the embodiment of the present application, a split design is formed between the cylinder body and the diaphragm head assembly of the diaphragm compressor, which allows the oil pipeline to be exposed to the outside of the cylinder body. Therefore, the diaphragm compressor in the present application solution can use the first cooling assembly to cool the oil in the cylinder body and use the second cooling assembly to cool the medium in the oil pipeline, which improves the control effect of the overall oil temperature, thereby better controlling the oil temperature, slowing down the aging of the hydraulic oil, and improving the performance of the diaphragm compressor; furthermore, due to the split design, a drive assembly can be connected to multiple diaphragm head assemblies through the oil pipeline at the same time, which enables a drive assembly to drive multiple diaphragms to perform compression at the same time, thereby increasing the flow rate of a single diaphragm compressor and improving the overall performance of the diaphragm compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0027] Figure 1 This is a cross-sectional structural diagram of the entire diaphragm compressor provided by an embodiment of the present application, with the driving component removed;

[0028] Figure 2 This embodiment of the present application provides Figure 1 A partial view of part A;

[0029] Figure 3 This is a schematic diagram provided in an embodiment of the present application for illustrating a diaphragm compressor connected to multiple membrane head assemblies;

[0030] Figure 4 This is a schematic diagram provided in an embodiment of the present application for demonstrating the double-action of a diaphragm compressor.

[0031] Reference numerals: 1, cylinder body; 10, thrust chamber; 101, first chamber; 102, second chamber; 100, stepped groove; 1000, sealing groove;

[0032] 2. Driving assembly; 21. Piston assembly; 22. Driving member;

[0033] 3. Diaphragm head assembly; 31. Main body; 310. Compression chamber; 32. Diaphragm;

[0034] 4. Oil pipeline;

[0035] 5. First cooling assembly; 51. Cooling chamber; 52. Closing sleeve; 521. Liquid inlet; 522. Liquid outlet; 53. Sealing ring; 54. Spoiler;

[0036] 6. Second cooling assembly; 61. Cooling jacket; 611. Water inlet; 612. Water outlet; 62. Closing plate; 63. Liquid cooling chamber. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0038] In the description of this application, it should be noted that, unless otherwise specified or limited, the term "and / or" herein is merely a description of an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " herein, unless otherwise specified, generally indicates that the associated objects are in an "or" relationship.

[0039] The following is combined with Figure 1-4 Provide a detailed introduction to this application.

[0040] Reference Figure 1-Figure 3 , is a diaphragm 32 compressor disclosed in the present application, including a cylinder body 1, having a thrust chamber 10; a drive assembly 2, including a piston assembly 21 movably arranged in the thrust chamber 10 and a drive member 22 for driving the piston assembly 21 to reciprocate; at least one diaphragm head assembly 3, including a main body 31 with a compression chamber 310 and a diaphragm 32 arranged in the main body 31, the cylinder body 1 is connected to the compression chamber 310 of at least one diaphragm head assembly 3 through an oil pipeline 4; the drive member 22 drives the piston assembly 21 to reciprocate in the cylinder body 1 to push the hydraulic oil in the cylinder body 1 into the compression chamber 310 through the oil pipeline 4, forcing the diaphragm 32 in the diaphragm head assembly 3 to perform reciprocating flexural deformation; it also includes a first cooling assembly 5 and a second cooling assembly 6, the first cooling assembly 5 is arranged on the outer wall of the cylinder body 1 for heat dissipation of the cylinder body 1, and the second cooling assembly 6 is arranged on the outer wall of the oil pipeline 4 for heat dissipation of the oil pipeline 4.

[0041] Specifically, the cylinder body 1 is configured to be cylindrical and have an axis, the thrust chamber 10 is configured along the axis of the cylinder body 1, the piston assembly 21 in the embodiment of the present application includes a crank-connecting rod structure and a piston, and the driving member 22 in the embodiment of the present application is a crankcase, in which a motor and a transmission structure are configured, thereby driving the piston assembly 21 to reciprocate along the axis of the cylinder body 1.

[0042] The material of the oil pipeline 4 is preferably a metal pipe. The metal oil pipeline 4 is better at transferring the heat of the hydraulic oil inside it and has better temperature control effect. In other optional examples, the oil pipeline 4 can also be a hydraulic hose, but the hydraulic hose will be affected by the thermal expansion and contraction of the hydraulic oil inside it and will be deformed. In terms of deformation resistance, it is not as good as the metal oil pipeline 4.

[0043] In an embodiment of the present application, the diaphragm head assembly 3 and the cylinder body 1 are connected by an oil pipeline 4, rather than the traditional one-piece fixed connection structure of the diaphragm head assembly 3 and the cylinder body 1. This makes the cylinder body 1 and the diaphragm head assembly 3 of the diaphragm 32 compressor form a split design, which makes the oil pipeline 4 exposed to the outside of the cylinder body 1. Therefore, the diaphragm 32 compressor in the present application can use the first cooling assembly 5 to cool the oil in the cylinder body 1 and use the second cooling assembly 6 to cool the medium in the oil pipeline 4, which improves the control effect of the overall temperature of the oil, thereby better controlling the oil temperature, slowing down the aging of the hydraulic oil, and improving the performance of the diaphragm 32 compressor; furthermore, due to the split design, a drive assembly 2 can simultaneously connect to multiple diaphragm head assemblies 3 through the oil pipeline 4, which enables a drive assembly 2 to simultaneously drive multiple diaphragms 32 to perform compression work, thereby increasing the flow of a single diaphragm 32 compressor and improving the overall performance of the diaphragm 32 compressor.

[0044] As one of the optional embodiments of the present application, the first cooling component 5 includes: a cooling chamber 51, which is formed by a recessed arrangement on the outer wall of the cylinder body 1; a closing sleeve 52, which is sleeved on the outer wall of the cylinder body 1 to close the cooling chamber 51; wherein, the closing sleeve 52 is provided with a liquid inlet 521 and a liquid outlet 522, and both the liquid inlet 521 and the liquid outlet 522 are connected to the cooling chamber 51 for the flow of cooling medium.

[0045] Specifically, the cylinder body 1 is provided with stepped grooves 100 at both ends of the closing sleeve 52. The depth of the stepped grooves 100 is shallower than the depth of the cooling chamber 51. The two ends of the closing sleeve 52 are embedded in the stepped grooves 100. When the two ends of the closing sleeve 52 are embedded in the stepped grooves 100, the closing sleeve 52 can seal the cooling chamber 51. The outer wall of the closing sleeve 52 is flush with the outer wall of the cylinder body 1. This setting makes the closing sleeve 52 more beautiful and the structure more reliable and stable.

[0046] In an embodiment of the present application, a specific structure of a first cooling assembly 5 is provided. A cooling chamber 51 is formed directly as a recess in the outer wall of the cylinder block 1. This allows the thickness of the cylinder block 1 to be reduced while forming the cooling chamber 51, thereby enabling the cooling medium to better cool the oil within the cylinder block 1. Furthermore, along the axis of the cylinder block 1, both ends of the sealing sleeve 52 are limited by stepped grooves 100, which further securely fix the sealing sleeve 52 to the cylinder block 1, thereby ensuring the stability of the cooling chamber 51 and stable cooling.

[0047] As one of the optional embodiments of the present application, the first cooling assembly 5 also includes a sealing ring 53. A sealing groove 1000 is recessed in the bottom surface of the stepped groove 100 close to the axis of the cylinder body 1. The sealing ring 53 is arranged in the sealing groove 1000. The sealing ring 53 is used to seal between the closing sleeve 52 and the cylinder body 1.

[0048] Specifically, the sealing sleeve 52 is made of metal and can be welded to the outer wall of the cylinder body 1. Two sealing rings 53 are installed in the installation groove 1000. The two sealing rings 53 are respectively located at the two ends of the sealing sleeve 52 to form a seal between the two ends of the sealing sleeve 52 and the cylinder body 1.

[0049] It should be noted that the sealing sleeve 52 can also be fixedly connected to the cylinder body by screws or bolts.

[0050] In the embodiment of the present application, the sealing ring 53 enhances the seal between the sealing sleeve 52 and the stepped groove 100, which improves the reliability of the cooling cavity 51, avoids leakage of the cooling medium in the cooling cavity 51, and ensures the overall reliability of the diaphragm 32 compressor.

[0051] As one of the optional embodiments of the present application, the first cooling assembly 5 further includes a spoiler 54 disposed within the cooling chamber 51. The spoiler 54 is spirally disposed within the cooling chamber 51 along the axis of the cylinder body 1, so that the cooling medium circulates in a spiral pattern within the cooling chamber 51. A liquid inlet 521 and a liquid outlet 522 are disposed at opposite ends of the spoiler 54 along the axis of the cylinder body 1.

[0052] Specifically, the spoiler 54 is a continuous, spirally arranged plate-like structure, and is fixed to the outer wall of the cylinder body 1 in the area of ​​the cooling chamber 51. It should be noted that in the embodiment of the present application, the side of the spoiler 54 facing away from the cylinder body 1 abuts the inner wall of the sealing sleeve 52. However, in some alternative embodiments, a gap may be left between the side of the spoiler 54 facing away from the cylinder body 1 and the inner wall of the sealing sleeve 52. Alternatively, in other embodiments, the spoilers 54 may be arranged in a spaced or random arrangement along the axis of the cylinder body 1, which is not specifically limited in this application.

[0053] The cooling medium enters through the liquid inlet 521 and flows out through the liquid outlet 522, removing heat from the cylinder body 1 and achieving the purpose of cooling and controlling the temperature. The cooling medium is preferably water, but in one example, it can also be a cooling liquid such as Freon. The liquid inlet 521 can be connected to an external delivery device, such as a pump. Alternatively, it can be disconnected from an external drive delivery device.

[0054] In the embodiment of the present application, the setting of the spoiler 54 allows the cooling medium to flow more fully in the cooling chamber 51, thereby increasing the contact time between the cooling medium and the outer wall of the cylinder 1, and thereby increasing the heat exchange efficiency of the cooling medium to the oil in the cylinder 1.

[0055] As one of the optional embodiments of the present application, the liquid inlet 521 is arranged above the liquid outlet 522 in the direction of gravity. In this embodiment of the present application, the liquid inlet 521 and the liquid outlet 522 are arranged vertically along the direction of gravity. The cooling medium can flow within the cooling cavity 51 by gravity, which is conducive to the smooth flow of the cooling medium and does not require additional devices to drive the flow of the cooling medium.

[0056] As one of the optional embodiments of the present application, the second cooling assembly 6 includes a cooling jacket 61 that is sleeved on the outer wall of the oil pipeline 4 and sealing plates 62 disposed at both ends of the cooling jacket 61. The cooling jacket 61, sealing plates 62, and the oil pipeline 4 enclose a liquid cooling cavity 63. The cooling jacket 61 is provided with a water inlet 611 and a water outlet 612 that communicate with the liquid cooling cavity 63. This second cooling assembly 6 is simple and convenient to manufacture, and has low cost.

[0057] The cooling water removes heat from the hydraulic oil within oil line 4. Due to the large surface area of ​​contact between oil line 4 and the hydraulic oil, cooling oil line 4 can be more effective and more flexible. For example, a preliminary operational test of oil line 4 can be performed to determine which areas are more prone to heat generation or have the highest heat output. Secondary cooling assembly 6 can then be installed in the corresponding locations to provide more targeted heat dissipation from oil line 4.

[0058] Reference Figure 4 As one of the optional embodiments of the present application, the piston assembly 21 separates the thrust chamber 10 into a first cavity 101 and a second cavity 102 that are independently sealed from each other. A plurality of diaphragm head assemblies 3 are provided, and the first cavity 101 and the second cavity 102 are respectively connected to at least one diaphragm head assembly 3. In the embodiment of the present application, the first cavity 101 and the second cavity 102 can each be connected to at least one diaphragm head assembly 3, which further increases the number of diaphragm head assemblies 3 that can be connected to a single cylinder 1, and when the diaphragm head assembly 3 connected to the first cavity 101 and the second cavity 102 works in the opposite direction, for example, Figure 4 In the diagram, when the crank-connecting rod mechanism drives the piston to move toward the right, the diaphragm head assembly 3 on the right is in a compression state, and when the crank-connecting rod mechanism drives the piston to move toward the left, the diaphragm head assembly 3 on the left is in a compression state, that is, no matter which direction the crank-connecting rod mechanism drives the piston to move, there is always a diaphragm head assembly 3 in a compression working state, which makes the diaphragm 32 compressor have a double-acting effect, effectively improving the flow rate of a single diaphragm 32 compressor.

[0059] The above description is only a partial implementation of the embodiments of the present application and does not constitute any form of limitation to the application. The protection scope of the embodiments of the present application is not limited thereto. Any simple modifications, equivalent changes and modifications that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the embodiments of the present application should be covered within the protection scope of the embodiments of the present application.

Claims

1. A diaphragm compressor, characterized in that: include: A cylinder (1) having a thrust chamber (10); A driving assembly (2) comprising a piston assembly (21) movably disposed in the thrust chamber (10) and a driving member (22) for driving the piston assembly (21) to reciprocate; At least one diaphragm head assembly (3) comprises a main body (31) having a compression chamber (310) and a diaphragm (32) arranged in the main body (31), and the cylinder (1) is connected to the compression chamber (310) of the at least one diaphragm head assembly (3) through an oil pipeline (4); The driving member (22) drives the piston assembly (21) to reciprocate in the cylinder body (1), so as to push the hydraulic oil in the cylinder body (1) into the compression chamber (310) through the oil pipeline (4), thereby forcing the diaphragm (32) in the diaphragm head assembly (3) to perform reciprocating flexural deformation; It also includes a first cooling assembly (5) and a second cooling assembly (6), wherein the first cooling assembly (5) is arranged on the outer wall of the cylinder body (1) for dissipating heat from the cylinder body (1), and the second cooling assembly (6) is arranged on the outer wall of the oil pipeline (4) for dissipating heat from the oil pipeline (4).

2. The diaphragm compressor according to claim 1, characterized in that The first cooling component (5) comprises: A cooling cavity (51), wherein the cooling cavity (51) is formed by being recessed from the outer wall of the cylinder body (1); A sealing sleeve (52) is sleeved on the outer wall of the cylinder body (1) to seal the cooling chamber (51); The sealing sleeve (52) is provided with a liquid inlet (521) and a liquid outlet (522), and both the liquid inlet (521) and the liquid outlet (522) are connected to the cooling cavity (51) for the flow of cooling medium.

3. The diaphragm compressor according to claim 2, characterized in that The cylinder body (1) is located at both ends of the sealing sleeve (52) and is provided with stepped grooves (100). The two ends of the sealing sleeve (52) are embedded in the stepped grooves (100), and the outer wall of the sealing sleeve (52) is flush with the outer wall of the cylinder body (1).

4. The diaphragm compressor according to claim 3, characterized in that The first cooling assembly (5) further includes a sealing ring (53), and a sealing groove (1000) is provided in the groove bottom surface of the stepped groove (100) close to the axis of the cylinder body (1). The sealing ring (53) is provided in the sealing groove (1000), and the sealing ring (53) is used for sealing between the closing sleeve (52) and the cylinder body (1).

5. The diaphragm compressor according to claim 2, characterized in that: The first cooling assembly (5) further includes a spoiler (54) disposed in the cooling cavity (51).

6. The diaphragm compressor according to claim 5, characterized in that The spoiler (54) is spirally arranged in the cooling cavity (51) along the axis of the cylinder (1), so that the cooling medium flows in the cooling cavity (51) in a spiral shape.

7. The diaphragm compressor according to claim 6, characterized in that On the axis of the cylinder body (1), the liquid inlet (521) and the liquid outlet (522) are respectively arranged at two ends of the spoiler (54).

8. The diaphragm compressor according to claim 2 or 7, characterized in that: In the direction of gravity, the liquid inlet (521) is arranged above the liquid outlet (522).

9. The diaphragm compressor according to claim 8, characterized in that The second cooling assembly (6) comprises a cooling jacket (61) sleeved on the outer wall of the oil pipeline (4) and sealing plates (62) arranged at both ends of the cooling jacket (61); a liquid cooling cavity (63) is formed between the cooling jacket (61), the sealing plates (62) and the oil pipeline (4); and a water inlet (611) and a water outlet (612) communicating with the liquid cooling cavity (63) are provided on the cooling jacket (61).

10. The diaphragm compressor according to claim 1, characterized in that The piston assembly (21) separates the thrust chamber (10) into a first chamber (101) and a second chamber (102) that are independently sealed from each other. A plurality of the diaphragm head assemblies (3) are provided, and the first chamber (101) and the second chamber (102) are respectively connected to at least one of the diaphragm head assemblies (3).

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