A four-cylinder symmetrical hydrogen compression cylinder

Abstract

This invention relates to the field of compressor technology, and in particular to a four-cylinder symmetrical hydrogen compression cylinder, comprising a dual-shaft reciprocating cylinder. A first compression section and a second compression section are drivenly connected to the left end of the dual-shaft reciprocating cylinder, with the first compression section located at the end furthest from the dual-shaft reciprocating cylinder. A third compression section and a fourth compression section are drivenly connected to the right end of the dual-shaft reciprocating cylinder, with the fourth compression section located at the end furthest from the dual-shaft reciprocating cylinder. The second compression section has a first compression storage chamber and a second compression storage chamber on its left and right sides, respectively. The third compression section has a third compression storage chamber and a fourth compression storage chamber on its left and right sides, respectively. This invention can improve compression efficiency.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a four-cylinder symmetrical hydrogen compression cylinder. Background Technology

[0002] Currently, most hydrogen compression cylinders are single-cylinder, two-stage compression systems with a fixed compression ratio, suitable for pressurizing gas at high inlet pressures. Due to the fixed cylinder compression ratio, fixed cylinder dimensions, and limitations in hydraulic system output flow, when the inlet pressure is low, the compressor displacement is small, and the single-cylinder pressure output is low, failing to meet the requirement of high-pressure, high-volume output for low-pressure hydrogen. Based on this, a multi-cylinder operating system has been developed, which changes the cylinder volume and compression ratio through different connection methods to increase the output pressure or flow rate. However, in the current market, hydrogen compression pressure is relatively low, while users require higher pressure and larger displacement; therefore, a four-cylinder symmetrical hydrogen compression cylinder is urgently needed to address this issue. Summary of the Invention

[0003] The purpose of this invention is to provide a four-cylinder symmetrical hydrogen compression cylinder block to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] A four-cylinder symmetrical hydrogen compression cylinder body includes a dual-shaft reciprocating oil cylinder. The left end of the dual-shaft reciprocating oil cylinder is drivenly connected to a first compression section and a second compression section. The first compression section is located at the end away from the dual-shaft reciprocating oil cylinder. The right end of the dual-shaft reciprocating oil cylinder is drivenly connected to a third compression section and a fourth compression section. The fourth compression section is located at the end away from the dual-shaft reciprocating oil cylinder.

[0006] The second compression section has a first compression storage cavity and a second compression storage cavity on its left and right sides, respectively; the third compression section has a third compression storage cavity and a fourth compression storage cavity on its left and right sides, respectively.

[0007] When the gas is compressed to the left, the hydrogen gas to be compressed in the first compression section enters the second compression storage chamber, the hydrogen gas to be compressed in the first compression storage chamber enters the second compression storage chamber, and the hydrogen gas to be compressed in the fourth compression section enters the second compression storage chamber. The hydrogen gas is compressed in the second compression storage chamber.

[0008] When the gas is compressed to the right, the hydrogen gas to be compressed in the first compression section enters the third compression storage chamber, the hydrogen gas to be compressed in the fourth compression storage chamber enters the third compression storage chamber, and the hydrogen gas is compressed in the third compression storage chamber.

[0009] Preferably, the first compression section includes a first cylinder, in which a first piston is slidably connected. The first piston is axially connected to the output shaft of the dual-axis reciprocating hydraulic cylinder. The first piston divides the first cylinder into a first chamber and a second chamber. The first chamber is located at one end away from the dual-axis reciprocating hydraulic cylinder. The outlet of the first chamber is connected to the second compression storage chamber, and the inlet of the first chamber is connected to the hydrogen input bus pipe.

[0010] Preferably, a first cover is fixed to one end of the first cylinder away from the dual-axis reciprocating cylinder. The first cover has a first air passage and a second air passage. One end of the first air passage and the second air passage are connected to the first cavity. The first air passage is connected to the hydrogen input bus pipe, and the second air passage is connected to the second compression storage cavity.

[0011] Preferably, the second compression section includes a second cylinder, and a second piston is slidably connected inside the second cylinder. The second piston is axially connected to the output shaft of the dual-axis reciprocating hydraulic cylinder.

[0012] The first compression temporary storage chamber is located on the side of the second piston away from the dual-axis reciprocating cylinder;

[0013] The first compression temporary storage cavity is connected to the second compression temporary storage cavity, and the second cavity is connected to the third compression temporary storage cavity.

[0014] Preferably, a second cover is fixedly connected to the end of the second cylinder away from the dual-shaft reciprocating cylinder, the second cover is fixedly connected to the end of the first cylinder, and a third air passage and a fourth air passage are provided on the second cover. One end of the third air passage is connected to the second cavity, the other end of the third air passage is connected to the hydrogen input bus pipe, and the end of the third air passage away from the second cavity is connected to the third compression storage cavity.

[0015] One end of the fourth air passage is connected to the first compression storage chamber, and the other end of the fourth air passage is connected to the second compression storage chamber. The fourth air passage is connected to the hydrogen input bus pipe, and the output shaft of the dual-axis reciprocating cylinder passes through the second cover in a sealed manner.

[0016] Preferably, a third cover is fixedly connected to one end of the second cylinder near the dual-axis reciprocating cylinder, and the end of the third cover away from the second cylinder is fixedly connected to the fixed end of the dual-axis reciprocating cylinder. A fifth air passage and a sixth air passage are provided on the third cover. One end of the fifth air passage and the sixth air passage are connected to the second compression storage chamber. The sixth air passage is connected to the fourth compression section, the sixth air passage is connected to the second air passage, and the sixth air passage is connected to the fourth air passage. The fifth air passage is used to discharge hydrogen gas. The output shaft of the dual-axis reciprocating cylinder passes through the third cover in a sealed manner.

[0017] Preferably, the third compression section includes a third cylinder, and a third piston is slidably connected inside the third cylinder, and the third piston is drively connected to the dual-shaft reciprocating hydraulic cylinder.

[0018] The third compression temporary storage chamber is located on the side of the third piston near the dual-shaft reciprocating oil cylinder;

[0019] A fourth cover is fixedly connected to one end of the third cylinder near the dual-shaft reciprocating cylinder. The end of the fourth cover away from the third cylinder is fixedly connected to the fixed end of the dual-shaft reciprocating cylinder. An eighth air passage and a seventh air passage are provided on the fourth cover. The ends of the eighth air passage and the seventh air passage are connected to the third compression storage chamber. The eighth air passage is used for hydrogen discharge. The seventh air passage is connected to the fourth compression storage chamber, the seventh air passage is connected to the third air passage, and the seventh air passage is connected to the fourth compression section.

[0020] The output shaft seal of the dual-axis reciprocating hydraulic cylinder passes through the fourth cover.

[0021] Preferably, a fifth cover is fixed to one end of the third cylinder away from the dual-shaft reciprocating cylinder. The fifth cover has a tenth air passage and a ninth air passage. One end of the tenth air passage is connected to the fourth compression storage chamber, and the other end of the tenth air passage is connected to the seventh air passage. The tenth air passage is connected to the hydrogen input bus pipe.

[0022] One end of the ninth gas passage is connected to the fourth compression section, the other end of the ninth gas passage is connected to the sixth gas passage, and the ninth gas passage is connected to the hydrogen input bus pipe.

[0023] The output shaft seal of the dual-axis reciprocating hydraulic cylinder passes through the fifth cover.

[0024] Preferably, the fourth compression section includes a fourth cylinder, a fourth piston is slidably connected inside the fourth cylinder, the fourth piston is axially connected to the output shaft of the dual-axis reciprocating oil cylinder, one end of the fourth cylinder is fixedly connected to the fifth cover, the fourth piston divides the fourth cylinder into a third chamber and a fourth chamber, the third chamber is located on the side of the fourth cylinder closer to the dual-axis reciprocating oil cylinder, the third chamber is connected to the ninth air passage, the fourth chamber is connected to the seventh air passage, and the fourth chamber is connected to the hydrogen input bus pipe.

[0025] Preferably, a sixth cover is fixedly connected to one end of the fourth cylinder away from the dual-shaft reciprocating cylinder. The sixth cover has a twelfth air passage and an eleventh air passage. The ends of the twelfth and eleventh air passages are connected to the fourth cavity. The twelfth air passage is connected to the hydrogen input bus pipe, and the eleventh air passage is connected to the seventh air passage.

[0026] The present invention has the following technical effects: In use, taking two-stage compression as an example, when the output shaft of the dual-shaft reciprocating cylinder moves to the left, the hydrogen gas in the first compression section enters the second compression section sequentially through the first exchange section and the third exchange section, and the hydrogen gas in the second compression section returns to the second compression section sequentially through the second exchange section and the third exchange section. The hydrogen gas in the fourth compression section enters the second compression section sequentially through the fifth exchange section and the third exchange section. At this time, the hydrogen gas in the second compression section is the hydrogen gas transmitted from the first compression section and the fourth compression section, so that the hydrogen gas is compressed in the second compression section; at the same time, the compressed hydrogen gas in the third compression section is discharged through the fourth exchange section.

[0027] When the output shaft of the dual-axis reciprocating cylinder moves to the right, the hydrogen gas in the first compression section enters the third compression section sequentially through the second and fourth exchange sections. The hydrogen gas in the third compression section returns to the third compression section sequentially through the fifth and fourth exchange sections. The hydrogen gas in the fourth compression section enters the third compression section sequentially through the sixth and fourth exchange sections. At this time, the hydrogen gas in the third compression section is the hydrogen gas transferred from the first and fourth compression sections, so that the hydrogen gas is compressed in the third compression section. At the same time, the hydrogen gas that has been compressed in the second compression section is discharged through the third exchange section.

[0028] This invention can also achieve different working states by changing the hydrogen intake method, realize multi-stage hydrogen compression, and perform gas cooling in each stage to ensure that the outlet gas temperature meets the specifications. The compression cylinder is symmetrically arranged and has the advantages of high integration, small space occupation, and high compression efficiency. It is adaptable to various compression conditions, has adaptive compression ratio, high compression efficiency, and adopts a unique separation structure to ensure that oil and gas are completely non-contact, achieving zero pollution. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a schematic diagram of a partial structure on the left side of the present invention;

[0032] Figure 3 This is a schematic diagram of a partial structure on the right side of the present invention;

[0033] Figure 4 For the present invention Figure 2 Enlarged view of a portion of point A in the middle;

[0034] Figure 5 This is a schematic diagram showing the gas flow direction when hydrogen is compressed to the left during the two-stage compression of this invention;

[0035] Figure 6 This is a schematic diagram showing the gas flow direction when hydrogen is compressed to the right during the second-stage compression of this invention;

[0036] Figure 7 This is a schematic diagram of the gas flow direction when hydrogen is compressed to the right during the three-stage compression in Embodiment 2 of the present invention;

[0037] Figure 8 This is a schematic diagram of the gas flow direction when hydrogen is compressed to the left during the three-stage compression in Embodiment 2 of the present invention;

[0038] Among them, 1. First airtight assembly; 2. Second airtight assembly; 3. Third airtight assembly; 4. Fourth airtight assembly; 5. First oil seal assembly; 6. Second oil seal assembly; 7. Third oil seal assembly; 8. Fourth oil seal assembly; 9. Fifth oil seal assembly; 10. Fifth airtight assembly; 11. Sixth airtight assembly; 12. Seventh airtight assembly; 13. Eighth airtight assembly; 14. Movable rod; 15. Fourth piston; 16. Third piston; 17. Fourth cover; 18. Fifth cover; 19. Sixth cover; 20. Dual-axis reciprocating cylinder; 21. Second oil-gas isolation sleeve; 22. Oil plug; 23. Displacement sensor; 24. Third cylinder; 25. Fourth cylinder; 26. Twelfth air passage; 27. 11. Air passage; 28. Tenth air passage; 29. ​​Ninth air passage; 30. Eighth air passage; 31. Seventh air passage; 32. First oil-gas isolation sleeve; 33. Third cover; 34. Second cylinder; 35. Second cover; 36. First cylinder; 37. First cover; 38. First air passage; 39. Second air passage; 40. Third air passage; 41. Fourth air passage; 42. Fifth air passage; 43. Sixth air passage; 44. Second piston; 45. First piston; 46. First cavity; 47. Second cavity; 48. First compression storage cavity; 49. Second compression storage cavity; 50. Third compression storage cavity; 51. Fourth compression storage cavity; 52. Third cavity; 53. Fourth cavity; 54. Water tank body. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1:

[0042] refer to Figures 1 to 6 This embodiment provides a four-cylinder symmetrical hydrogen compression cylinder body, including a dual-shaft reciprocating oil cylinder 20. The left end of the dual-shaft reciprocating oil cylinder 20 is connected to a first compression section and a second compression section. The first compression section is located at the end away from the dual-shaft reciprocating oil cylinder 20. The right end of the dual-shaft reciprocating oil cylinder 20 is connected to a third compression section and a fourth compression section. The fourth compression section is located at the end away from the dual-shaft reciprocating oil cylinder 20.

[0043] The second compression section has a first compression storage cavity 48 and a second compression storage cavity 49 on its left and right sides respectively, and the third compression section has a third compression storage cavity 50 and a fourth compression storage cavity 51 on its left and right sides respectively.

[0044] When the gas is compressed to the left, the hydrogen gas to be compressed in the first compression section enters the second compression storage chamber 49, the hydrogen gas to be compressed in the first compression storage chamber 48 enters the second compression storage chamber 49, and the hydrogen gas to be compressed in the fourth compression section enters the second compression storage chamber 49. The hydrogen gas is compressed in the second compression storage chamber 49.

[0045] When the gas is compressed to the right, the hydrogen gas to be compressed in the first compression section enters the third compression storage chamber 50, the hydrogen gas to be compressed in the fourth compression storage chamber 51 enters the third compression storage chamber 50, and the hydrogen gas to be compressed in the fourth compression section enters the third compression storage chamber 50. The hydrogen gas is compressed in the third compression storage chamber 50.

[0046] In use, taking two-stage compression as an example, when the output shaft of the dual-shaft reciprocating cylinder 20 moves to the left, the hydrogen to be compressed in the first chamber 46, the first compression storage chamber 48, and the third chamber 52 enters the second compression storage chamber 49 for compression, while the compressed hydrogen in the third compression storage chamber 50 is discharged. When the output shaft of the dual-shaft reciprocating cylinder 20 moves to the right, the hydrogen to be compressed in the second chamber 47, the fourth compression storage chamber 51, and the fourth chamber 53 enters the third compression storage chamber 50 for compression, while the compressed hydrogen in the second compression storage chamber 49 is discharged, thereby improving the hydrogen compression efficiency.

[0047] This embodiment can also achieve different working states by changing the hydrogen intake method, realize multi-stage hydrogen compression, and perform gas cooling in each stage to ensure that the outlet gas temperature meets the specifications. The compression cylinder is symmetrically arranged and has the advantages of high integration, small space occupation, and high compression efficiency. It is adaptable to various compression conditions, has adaptive compression ratio, high compression efficiency, and adopts a unique separation structure to ensure that oil and gas are completely non-contact, achieving zero pollution.

[0048] In this embodiment, the dual-axis reciprocating cylinder 20 includes an oil plug 22, which is slidably connected inside the dual-axis reciprocating cylinder 20. A third oil seal assembly 7 is located between the inner wall of the dual-axis reciprocating cylinder 20 and the outer wall of the oil plug 22 to ensure a sealing effect. In use, oil ports are opened at both ends of the movable range of the oil plug 22 on the dual-axis reciprocating cylinder 20. The oil plug 22 divides the dual-axis reciprocating cylinder 20 into two oil chambers. By pumping oil into one oil chamber, the oil plug 22 is driven to move. Then, by pumping oil into the other oil chamber, the oil plug 22 is driven to move in the opposite direction. This process is repeated to realize the reciprocating motion of the oil plug 22. A movable rod 14 is coaxially sleeved on the oil plug 22. The middle part of the movable rod 14 is fixedly connected to the oil plug 22. The movable rod 14 is connected to the first compression part, the second compression part, the third compression part, and the fourth compression part through a transmission connection.

[0049] At both ends of the dual-axis reciprocating cylinder 20, a first oil-gas isolation sleeve 32 and a second oil-gas isolation sleeve 21 are respectively fixed to isolate oil and gas. One end of the first oil-gas isolation sleeve 32 is fixed to one end of the fixed part of the dual-axis reciprocating cylinder 20, and one end of the second oil-gas isolation sleeve 21 is fixed to the end of the fixed part of the dual-axis reciprocating cylinder 20 away from the first oil-gas isolation sleeve 32.

[0050] Both ends of the movable rod 14 pass through the middle of the first oil-gas isolation sleeve 32 and the second oil-gas isolation sleeve 21 and are slidably disposed. A first oil seal assembly 5 and a second oil seal assembly 6 are provided at the contact part between the first oil-gas isolation sleeve 32 and the movable rod 14 to prevent oil leakage when the movable rod 14 moves.

[0051] A fourth oil seal assembly 8 and a fifth oil seal assembly 9 are provided at the contact portion between the second oil-gas isolation sleeve 21 and the movable rod 14 to prevent oil leakage when the movable rod 14 moves.

[0052] The first oil seal assembly 5, the second oil seal assembly 6, the third oil seal assembly 7, the fourth oil seal assembly 8, and the fifth oil seal assembly 9 are all preferably sealing rings.

[0053] In a further optimized design, the first compression section includes a first cylinder 36, in which a first piston 45 is slidably connected. The first piston 45 is shaft-connected to the output shaft of the dual-axis reciprocating cylinder 20. The first piston 45 divides the first cylinder 36 into a first chamber 46 and a second chamber 47. The first chamber 46 is located at the end away from the dual-axis reciprocating cylinder 20. The outlet of the first chamber 46 is connected to the second compression storage chamber 49, and the inlet of the first chamber 46 is connected to the hydrogen input bus pipe.

[0054] In a further optimized design, a first cover 37 is fixedly connected to the end of the first cylinder 36 away from the dual-axis reciprocating cylinder 20. A first air passage 38 and a second air passage 39 are provided on the first cover 37. One end of the first air passage 38 and the second air passage 39 are connected to the first cavity 46. The first air passage 38 is connected to the hydrogen input bus pipe, and the second air passage 39 is connected to the second compression temporary storage cavity 49.

[0055] The scheme is further optimized. The second compression section includes a second cylinder 34, and a second piston 44 is slidably connected inside the second cylinder 34. The second piston 44 is shaft-connected to the output shaft of the dual-axis reciprocating oil cylinder 20.

[0056] The first compression temporary storage chamber 48 is located on the side of the second piston 44 away from the dual-shaft reciprocating oil cylinder 20;

[0057] The first compression storage chamber 48 is connected to the second compression storage chamber 49, and the second chamber 47 is connected to the third compression storage chamber 50.

[0058] In a further optimized design, a second cover 35 is fixedly connected to the end of the second cylinder 34 away from the dual-shaft reciprocating cylinder 20. The second cover 35 is fixedly connected to the end of the first cylinder 36. A third air passage 40 and a fourth air passage 41 are provided on the second cover 35. One end of the third air passage 40 is connected to the second cavity 47, and the other end of the third air passage 40 is connected to the hydrogen input bus pipe. The end of the third air passage 40 away from the second cavity 47 is connected to the third compression storage cavity 50.

[0059] One end of the fourth air passage 41 is connected to the first compression storage chamber 48, and the other end of the fourth air passage 41 is connected to the second compression storage chamber 49. The fourth air passage 41 is connected to the hydrogen input bus pipe, and the output shaft of the dual-axis reciprocating cylinder 20 passes through the second cover 35.

[0060] In a further optimized design, a third cover 33 is fixedly connected to one end of the second cylinder 34 near the dual-axis reciprocating cylinder 20. The end of the third cover 33 away from the second cylinder 34 is fixedly connected to the fixed end of the dual-axis reciprocating cylinder 20. A fifth air passage 42 and a sixth air passage 43 are provided on the third cover 33. One end of the fifth air passage 42 and the sixth air passage 43 is connected to the second compression storage chamber 49. The sixth air passage 43 is connected to the fourth compression section. The sixth air passage 43 is connected to the second air passage 39. The sixth air passage 43 is connected to the fourth air passage 41. The fifth air passage 42 is used to discharge hydrogen. The output shaft of the dual-axis reciprocating cylinder 20 passes through the third cover 33.

[0061] The scheme is further optimized. The third compression section includes a third cylinder 24, and a third piston 16 is slidably connected inside the third cylinder 24. The third piston 16 is connected to the dual-shaft reciprocating oil cylinder 20 for transmission.

[0062] The third compression temporary storage chamber 50 is located on the side of the third piston 16 near the dual-shaft reciprocating oil cylinder 20;

[0063] The third cylinder 24 is fixedly connected to a fourth cover 17 at one end near the dual-shaft reciprocating cylinder 20. The fourth cover 17 is fixedly connected to a fixed end of the dual-shaft reciprocating cylinder 20 at the other end away from the third cylinder 24. An eighth air passage 30 and a seventh air passage 31 are provided on the fourth cover 17. The ends of the eighth air passage 30 and the seventh air passage 31 are connected to the third compression storage chamber 50. The eighth air passage 30 is used for hydrogen discharge. The seventh air passage 31 is connected to the fourth compression storage chamber 51, the seventh air passage 31 is connected to the third air passage 40, and the seventh air passage 31 is connected to the fourth compression section.

[0064] The output shaft seal of the dual-axis reciprocating hydraulic cylinder 20 passes through the fourth cover 17.

[0065] In a further optimized scheme, the third cylinder 24 is fixedly connected to a fifth cover 18 at one end away from the dual-shaft reciprocating cylinder 20. The fifth cover 18 has a tenth air passage 28 and a ninth air passage 29. One end of the tenth air passage 28 is connected to the fourth compression storage chamber 51, and the other end of the tenth air passage 28 is connected to the seventh air passage 31. The tenth air passage 28 is connected to the hydrogen input bus pipe.

[0066] One end of the ninth gas passage 29 is connected to the fourth compression section, the other end of the ninth gas passage 29 is connected to the sixth gas passage 43, and the ninth gas passage 29 is connected to the hydrogen input bus pipe.

[0067] The output shaft seal of the dual-axis reciprocating hydraulic cylinder 20 passes through the fifth cover 18.

[0068] In a further optimized design, the fourth compression section includes a fourth cylinder 25, a fourth piston 15 which is slidably connected inside the fourth cylinder 25, and the fourth piston 15 is shaft-connected to the output shaft of the dual-axis reciprocating oil cylinder 20. One end of the fourth cylinder 25 is fixedly connected to the fifth cover 18. The fourth piston 15 divides the fourth cylinder 25 into a third chamber 52 and a fourth chamber 53. The third chamber 52 is located on the side of the fourth cylinder 25 near the dual-axis reciprocating oil cylinder 20. The third chamber 52 is connected to the ninth air passage 29, and the fourth chamber 53 is connected to the seventh air passage 31 and the hydrogen input bus pipe.

[0069] In a further optimized design, the fourth cylinder 25 is fixedly connected to a sixth cover 19 at one end away from the dual-shaft reciprocating cylinder 20. The sixth cover 19 has a twelfth air passage 26 and an eleventh air passage 27. The ends of the twelfth air passage 26 and the eleventh air passage 27 are connected to the fourth cavity 53. The twelfth air passage 26 is connected to the hydrogen input bus pipe, and the eleventh air passage 27 is connected to the seventh air passage 31.

[0070] The first cylinder 36 is divided into a first cavity 46 and a second cavity 47 by the first piston 45. A first airtight assembly 1 is fitted onto the first piston 45 to prevent communication between the first cavity 46 and the second cavity 47 when the first piston 45 moves. Similarly, a third airtight assembly 3, a sixth airtight assembly 11, and an eighth airtight assembly 13 are fitted onto the second piston 44, the third piston 16, and the fourth piston 15, respectively, and their functions are the same as those of the first airtight assembly 1.

[0071] The two ends of the movable rod 14 pass through the second cover 35, the third cover 33, the fourth cover 17, and the fifth cover 18, respectively. The movable rod 14 is slidably disposed in the middle of the second cover 35, the third cover 33, the fourth cover 17, and the fifth cover 18. The second airtight component 2, the fourth airtight component 4, the fifth airtight component 10, and the seventh airtight component 12 are respectively disposed in the contact parts between the second cover 35, the third cover 33, the fourth cover 17, and the fifth cover 18 and the side wall of the movable rod 14 to prevent air leakage when the movable rod 14 moves.

[0072] The first airtight component 1, the second airtight component 2, the third airtight component 3, the fourth airtight component 4, the fifth airtight component 10, the sixth airtight component 11, the seventh airtight component 12 and the eighth airtight component 13 are all preferably sealing rings.

[0073] In this embodiment, the sealing element is configured as a standard setting, which will not be described in detail here.

[0074] A displacement sensor 23 can also be installed at either end of the movable rod 14. The displacement sensor 23 is used to detect the displacement state of the movable rod 14.

[0075] In this embodiment, one end of the displacement sensor 23 is axially fixed to the first cover 37, the movable end of the displacement sensor 23 is located inside the first cylinder 36, and the movable end of the displacement sensor 23 is fixedly connected to the end of the movable rod 14.

[0076] The working process of this embodiment is as follows:

[0077] Taking two-stage compression as an example, a four-cylinder symmetrical hydrogen compression cylinder body in this embodiment includes a first cylinder 36 and a fourth cylinder 25 symmetrically arranged, and a second cylinder 34 and a third cylinder 24 symmetrically arranged. A first piston 45, a second piston 44, a third piston 16, and a fourth piston 15 are slidably arranged in the first cylinder 36, the second cylinder 34, the third cylinder 24, and the fourth cylinder 25, respectively. The first piston 45, the second piston 44, the third piston 16, and the fourth piston 15 are fixed to a movable rod 14. An oil plug 22 is fixedly connected to the middle of the movable rod 14. The dual-axis reciprocating oil cylinder 20 is divided into two chambers by the oil plug 22. By circulating oil in and out on both sides of the oil plug 22, the movable rod 14 is pushed to reciprocate, thereby driving the first piston 45, the second piston 44, the third piston 16, and the fourth piston 15 to slide left and right in the first cylinder 36, the second cylinder 34, the third cylinder 24, and the fourth cylinder 25, respectively, thereby realizing the intake and exhaust of hydrogen.

[0078] The first cover 37 is provided with a first air passage 38 and a second air passage 39. The first air passage 38 is used for hydrogen to enter the first cylinder 36, and the second air passage 39 is used for hydrogen to exit the first cylinder 36.

[0079] The sixth cover 19 is provided with a twelfth air passage 26 and an eleventh air passage 27. The twelfth air passage 26 is used for hydrogen to enter the fourth cylinder 25, and the eleventh air passage 27 is used for hydrogen to exit the fourth cylinder 25.

[0080] The fifth cover 18 is provided with a tenth air passage 28 and a ninth air passage 29. The tenth air passage 28 is used for the entry and exit of hydrogen in the third cylinder 24, and the ninth air passage 29 is used for the entry and exit of hydrogen in the fourth cylinder 25.

[0081] The second cover 35 is provided with a third air passage 40 and a fourth air passage 41. The third air passage 40 is used for the entry and exit of hydrogen in the first cylinder 36, and the fourth air passage 41 is used for the entry and exit of hydrogen in the second cylinder 34.

[0082] The fourth cover 17 is provided with an eighth air passage 30 and a seventh air passage 31. The seventh air passage 31 is used for hydrogen to enter the third cylinder 24, and the eighth air passage 30 is used for hydrogen to exit the third cylinder 24.

[0083] The third cover 33 is provided with a fifth air passage 42 and a sixth air passage 43. The fifth air passage 42 is used for hydrogen to be discharged from the second cylinder 34, and the sixth air passage 43 is used for hydrogen to be introduced into the second cylinder 34.

[0084] Since the hydrogen flow in gas channels 1 (38), 2 (39), 5 (42), 6 (43), 8 (30), 7 (31), 12 (26), and 11 (27) is unidirectional, and their functions are all singular, one-way valves are installed at each of these channels to ensure their respective functions. When connecting pipelines, a one-way valve is added to the outlet pipeline whenever the gas flow is unidirectional.

[0085] The water cylinder body 54 is set in the reserved interlayer between the cylinder bodies of each stage of the air cylinder, and the water cylinder body 54 is provided with water inlet and outlet.

[0086] Reference Figures 2 to 3 A hydrogen input main pipe is provided, which is connected to the first gas passage 38, the third gas passage 40, the tenth gas passage 28, and the twelfth gas passage 26 via parallel branch pipes for hydrogen input. One-way valves are installed on the branch pipes connected to the third gas passage 40 and the tenth gas passage 28, so that hydrogen can only enter the corresponding cylinders through the hydrogen input main pipe via the third gas passage 40 and the tenth gas passage 28, and hydrogen can enter the corresponding cylinders through the first gas passage 38, the third gas passage 40, the tenth gas passage 28, and the twelfth gas passage 26.

[0087] A hydrogen output main pipe is provided, which is connected to the second gas passage 39, the fourth gas passage 41, the sixth gas passage 43, the seventh gas passage 31, the ninth gas passage 29, and the eleventh gas passage 27 via parallel branch pipes for the movement of hydrogen. One-way valves are installed on the branch pipes connected to the fourth gas passage 41 and the ninth gas passage 29 to ensure that hydrogen can only enter the hydrogen output main pipe through the fourth gas passage 41 and the ninth gas passage 29.

[0088] The third gas passage 40 is also connected to the hydrogen output bus pipe via a branch pipe. A one-way valve is installed on the branch pipe connecting the third gas passage 40 and the hydrogen output bus pipe, so that hydrogen can only flow from the third gas passage 40 to the hydrogen output bus pipe.

[0089] The fourth gas passage 41 is also connected to the hydrogen input bus pipe via a branch pipe. A one-way valve is provided on the branch pipe connecting the fourth gas passage 41 and the hydrogen input bus pipe, so that hydrogen can only flow from the hydrogen input bus pipe to the fourth gas passage 41.

[0090] The tenth gas passage 28 is also connected to the hydrogen output bus pipe via a branch pipe. The branch pipe connecting the third gas passage 40 to the hydrogen output bus pipe is equipped with a one-way valve, so that hydrogen can only flow from the tenth gas passage 28 to the hydrogen output bus pipe.

[0091] The ninth gas passage 29 is also connected to the hydrogen input bus pipe via a branch pipe. A one-way valve is installed on the branch pipe connecting the ninth gas passage 29 and the hydrogen input bus pipe, so that hydrogen can only flow from the hydrogen input bus pipe to the ninth gas passage 29.

[0092] When the oil plug 22 moves to the left, the hydrogen gas in the left chamber of the first cylinder 36 is discharged through the second air passage 39, the hydrogen gas in the left chamber of the second cylinder 34 is discharged through the fourth air passage 41, the hydrogen gas in the left chamber of the third cylinder 24 is discharged through the eighth air passage 30, and the hydrogen gas in the left chamber of the fourth cylinder 25 is discharged through the ninth air passage 29. At this time, only the hydrogen gas in the first cylinder 36, the second cylinder 34, and the fourth cylinder 25 flows into the hydrogen output bus pipe. This part of the hydrogen gas will move to the left with the second piston 44 in the second cylinder 34 and enter the right chamber of the second cylinder 34 through the sixth air passage 43.

[0093] When the oil plug 22 moves to the right, the hydrogen gas in the right chamber of the first cylinder 36 is discharged through the third air passage 40, the hydrogen gas in the right chamber of the second cylinder 34 is discharged through the fifth air passage 42, the hydrogen gas in the right chamber of the third cylinder 24 is discharged through the tenth air passage 28, and the hydrogen gas in the right chamber of the fourth cylinder 25 is discharged through the eleventh air passage 27. At this time, only the hydrogen gas in the first cylinder 36, the third cylinder 24, and the fourth cylinder 25 flows into the hydrogen output bus pipe. This part of the hydrogen gas will move to the right with the third piston 16 in the third cylinder 24 and enter the left chamber of the third cylinder 24 through the seventh air passage 31. This process is repeated, and the hydrogen gas is pushed by the piston twice to achieve two-stage compression of hydrogen gas.

[0094] Example 2:

[0095] refer to Figures 7 to 8 This embodiment illustrates the connection method for achieving three-stage hydrogen compression according to the present invention.

[0096] The difference between this embodiment and Embodiment 1 is that the third air passage 40 is connected to the first compression storage chamber 48, and the fourth air passage 41 is connected to the second chamber 47.

[0097] Taking three-stage compression as an example, when the oil plug 22 moves to the right, the third air passage 40 and the eighth air passage 30 draw hydrogen into the first compression storage chamber 48 and the third compression storage chamber 50 respectively. At the same time, the hydrogen in the second compression storage chamber 49 flows through the sixth air passage 43 and the hydrogen in the fourth compression storage chamber 51 flows through the tenth air passage 28 and enters the first chamber 46 through the second air passage 39.

[0098] When the oil plug 22 moves to the left, hydrogen enters the second compression storage chamber 49 and the fourth compression storage chamber 51 through the fifth gas passage 42 and the tenth gas passage 28 respectively. At the same time, the hydrogen in the first compression storage chamber 48 flows through the third gas passage 40 and the hydrogen in the third compression storage chamber 50 through the seventh gas passage 31 and enters the fourth chamber 53 through the eleventh gas passage 27.

[0099] When the oil plug 22 moves to the right again, the hydrogen in the fourth chamber 53 enters the third chamber 52 through the twelfth air passage 26 and the ninth air passage 29, while the hydrogen in the second chamber 47 is discharged through the fourth air passage 41 from the hydrogen output bus pipe.

[0100] The discharged hydrogen gas is pushed by the piston three times, achieving three-stage compression.

[0101] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0102] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A four-cylinder symmetrical hydrogen compression cylinder block, characterized in that: Includes a dual-axis reciprocating cylinder (20), the left end of which is connected to a first compression section and a second compression section, the first compression section being located at an end away from the dual-axis reciprocating cylinder (20), the right end of which is connected to a third compression section and a fourth compression section, the fourth compression section being located at an end away from the dual-axis reciprocating cylinder (20); The second compression section is provided with a first compression storage cavity (48) and a second compression storage cavity (49) on the left and right sides respectively, and the third compression section is provided with a third compression storage cavity (50) and a fourth compression storage cavity (51) on the left and right sides respectively. The first compression section includes a first cylinder (36), in which a first piston (45) is slidably connected. The first piston (45) is shaft-connected to the output shaft of the dual-axis reciprocating cylinder (20). The first piston (45) divides the first cylinder (36) into a first chamber (46) and a second chamber (47). The first chamber (46) is located at one end away from the dual-axis reciprocating cylinder (20). The second air passage (39) of the first chamber (46) is connected to the sixth air passage (43) of the second compression storage chamber (49). The first chamber (46) also has the first air passage (39). The second compression section includes a second cylinder (34), in which a second piston (44) is slidably connected, and the second piston (44) is axially connected to the output shaft of the dual-axis reciprocating cylinder (20); the first compression storage chamber (48) is located on the side of the second piston (44) away from the dual-axis reciprocating cylinder (20); the fourth air passage (41) of the first compression storage chamber (48) is connected to the sixth air passage (43) of the second compression storage chamber (49), and the third air passage (40) of the second cavity (47) is connected to the seventh air passage (31) of the third compression storage chamber (50); The third compression section includes a third cylinder (24), in which a third piston (16) is slidably connected, and the third piston (16) is drivenly connected to the dual-shaft reciprocating oil cylinder (20); the third compression storage chamber (50) is located on the side of the third piston (16) near the dual-shaft reciprocating oil cylinder (20), and the seventh air passage (31) of the third compression storage chamber (50) and the tenth air passage (28) of the fourth compression storage chamber (51) are connected; The fourth compression section includes a fourth cylinder (25), and a fourth piston (15) is slidably connected inside the fourth cylinder (25). The fourth piston (15) is shaft-connected to the output shaft of the dual-axis reciprocating oil cylinder (20). The fourth piston (15) divides the fourth cylinder (25) into a third chamber (52) and a fourth chamber (53). The third chamber (52) is located on the side of the fourth cylinder (25) near the dual-axis reciprocating oil cylinder (20). The ninth air passage (29) of the third chamber (52) is connected to the sixth air passage (43) of the second compression storage chamber (49). The eleventh air passage (27) of the fourth chamber (53) is connected to the seventh air passage (31) of the third compression storage chamber (50). The fourth chamber (53) is connected to the hydrogen input bus pipe. The first gas passage (38), the third gas passage (40), the fourth gas passage (41), the ninth gas passage (29), the tenth gas passage (28), and the twelfth gas passage are all connected to the hydrogen input bus pipe; When the gas is compressed to the left, the hydrogen gas to be compressed in the first compression section enters the second compression storage chamber (49), the hydrogen gas to be compressed in the first compression storage chamber (48) enters the second compression storage chamber (49), the hydrogen gas to be compressed in the fourth compression section enters the second compression storage chamber (49), and the hydrogen gas is compressed in the second compression storage chamber (49). When the gas is compressed to the right, the hydrogen gas to be compressed in the first compression section enters the third compression storage chamber (50), the hydrogen gas to be compressed in the fourth compression storage chamber (51) enters the third compression storage chamber (50), and the hydrogen gas to be compressed in the fourth compression section enters the third compression storage chamber (50), and the hydrogen gas is compressed in the third compression storage chamber (50).

2. The four-cylinder symmetrical hydrogen compression cylinder block according to claim 1, characterized in that: The first cylinder (36) is fixedly connected to a first cover (37) at one end away from the dual-axis reciprocating cylinder (20). The first cover (37) has a first air passage (38) and a second air passage (39). One end of the first air passage (38) and one end of the second air passage (39) are connected to the first cavity (46). The second air passage (39) is connected to the second compression storage cavity (49).

3. The four-cylinder symmetrical hydrogen compression cylinder block according to claim 2, characterized in that: The second cylinder (34) is fixedly connected to a second cover (35) at one end away from the dual-shaft reciprocating cylinder (20). The second cover (35) is fixedly connected to the end of the first cylinder (36). The second cover (35) is provided with a third air passage (40) and a fourth air passage (41). One end of the third air passage (40) is connected to the second cavity (47), and the other end of the third air passage (40) is connected to the hydrogen input bus pipe. One end of the fourth air passage (41) is connected to the first compression storage chamber (48), and the other end of the fourth air passage (41) is connected to the second compression storage chamber (49). The output shaft of the dual-axis reciprocating cylinder (20) passes through the second cover (35) in a sealed manner.

4. The four-cylinder symmetrical hydrogen compression cylinder block according to claim 3, characterized in that: A third cover (33) is fixedly connected to one end of the second cylinder (34) near the end of the dual-axis reciprocating cylinder (20). The end of the third cover (33) away from the second cylinder (34) is fixedly connected to the fixed end of the dual-axis reciprocating cylinder (20). A fifth air passage (42) and a sixth air passage (43) are provided on the third cover (33). One end of the fifth air passage (42) and one end of the sixth air passage (43) are connected to the second compression storage chamber (49). The sixth air passage (43) is connected to the fourth compression section. The sixth air passage (43) is connected to the second air passage (39). The sixth air passage (43) is connected to the fourth air passage (41). The fifth air passage (42) is used to discharge hydrogen. The output shaft of the dual-axis reciprocating cylinder (20) passes through the third cover (33) in a sealed manner.

5. The four-cylinder symmetrical hydrogen compression cylinder block according to claim 4, characterized in that: The third cylinder (24) is fixedly connected to a fourth cover (17) at one end near the dual-axis reciprocating cylinder (20). The fourth cover (17) is fixedly connected to the fixed end of the dual-axis reciprocating cylinder (20) at the other end away from the third cylinder (24). The fourth cover (17) is provided with an eighth air passage (30) and a seventh air passage (31). One end of the eighth air passage (30) and one end of the seventh air passage (31) are connected to the third compression storage chamber (50). The eighth air passage (30) is used for hydrogen discharge. The seventh air passage (31) is connected to the fourth compression storage chamber (51), the seventh air passage (31) is connected to the third air passage (40), and the seventh air passage (31) is connected to the fourth compression section. The output shaft of the dual-axis reciprocating cylinder (20) passes through the fourth cover (17) in a sealed manner.

6. The four-cylinder symmetrical hydrogen compression cylinder block according to claim 5, characterized in that: The third cylinder (24) is fixedly connected to a fifth cover (18) at one end away from the dual-shaft reciprocating cylinder (20). The fifth cover (18) has a tenth air passage (28) and a ninth air passage (29). One end of the tenth air passage (28) is connected to the fourth compression storage chamber (51), and the other end of the tenth air passage (28) is connected to the seventh air passage (31). One end of the ninth air passage (29) is connected to the fourth compression section, and the other end of the ninth air passage (29) is connected to the sixth air passage (43); the output shaft of the dual-axis reciprocating cylinder (20) passes through the fifth cover (18) in a sealed manner.

7. The four-cylinder symmetrical hydrogen compression cylinder block according to claim 6, characterized in that: The fourth cylinder (25) is fixedly connected to a sixth cover (19) at one end away from the dual-shaft reciprocating cylinder (20). The sixth cover (19) has a twelfth air passage (26) and an eleventh air passage (27). One end of the twelfth air passage (26) and one end of the eleventh air passage (27) are connected to the fourth cavity (53). The eleventh air passage (27) is connected to the seventh air passage (31).

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