High-pressure fluid conveying device

Abstract

A high-pressure fluid conveying device relates to high-pressure fluid conveying equipment and comprises a first pressurizing unit, a hydraulic cylinder unit and a second pressurizing unit, one end of the hydraulic cylinder unit is connected with the first pressurizing unit, and the other end of the hydraulic cylinder unit is connected with the second pressurizing unit; the hydraulic piston is slidably and hermetically connected with the hydraulic cylinder barrel; the first working piston is in sliding sealing connection with the first pressurizing unit; the second working piston is in sliding sealing connection with the second pressurizing unit; the outlet of the first supercharging unit is communicated with the inlet of the second supercharging unit, and the first supercharging unit and the second supercharging unit are integrated in one pump body, so that the acquisition cost of equipment is reduced.

Description

Technical Field

[0001] The utility model relates to high-pressure fluid conveying equipment, in particular to a high-pressure fluid conveying device. Background Art

[0002] Chinese utility model patent publication number CN218669701U discloses an ultra-low-pressure dual-head liquid-driven piston hydrogen compressor, which relates to the technical field of boosting equipment. The compressor comprises a base, on which are mounted a primary booster pump, a secondary booster pump, a hydraulic system, a balancing gas tank, and a hydraulic oil balancing tank. The primary and secondary booster pumps are connected with a balancing gas tank and a hydraulic oil balancing tank. The primary and secondary booster pumps consist of a cylinder I, a hydraulic cylinder, and a cylinder II. A hydraulic oil recovery port I is defined on block I, and a hydraulic oil recovery port II is defined on block II. A hydraulic oil recovery tank is connected between these ports. This utility model utilizes the primary and secondary booster pumps for secondary compression. This hydrogen compressor requires two pump bodies, increasing the equipment's purchase cost. Summary of the Invention

[0003] In view of the above technical problems existing in the prior art, the utility model provides a high-pressure fluid delivery device, which integrates a first pressurizing unit and a second pressurizing unit into a pump body, thereby reducing the purchase cost of the equipment.

[0004] To achieve the above technical objectives, the present invention provides a high-pressure fluid delivery device, comprising a first boosting unit, a hydraulic cylinder unit, and a second boosting unit, wherein one end of the hydraulic cylinder unit is connected to the first boosting unit and the other end is connected to the second boosting unit;

[0005] The hydraulic cylinder unit includes a hydraulic cylinder barrel and a piston assembly; a hydraulic piston is provided in the middle of the piston assembly, a first working piston is provided at one end, and a second working piston is provided at the other end; the hydraulic piston, the first working piston and the second working piston are coaxially arranged;

[0006] The hydraulic piston is slidably and sealingly connected to the hydraulic cylinder;

[0007] The first working piston is slidably and sealedly connected to the first boosting unit; the second working piston is slidably and sealedly connected to the second boosting unit;

[0008] The outflow port of the first supercharging unit is communicated with the inflow port of the second supercharging unit.

[0009] In some embodiments, the diameter of the first working piston is greater than the diameter of the second working piston.

[0010] In some embodiments, the first pressurizing unit includes a first working cylinder, and the first working piston is slidably and sealingly connected to the first working cylinder;

[0011] The second pressurizing unit includes a second working cylinder, and the second working piston is slidably and sealingly connected to the second working cylinder.

[0012] In some embodiments, further comprising a first end cap, a second end cap, a third end cap, and a fourth end cap;

[0013] The first end cover, the first working cylinder, the second end cover, the hydraulic cylinder barrel, the third end cover, the second working cylinder and the fourth end cover are connected end to end in sequence.

[0014] In some embodiments, an intake manifold is further included, which is connected to the first cavity on one side of the first working piston through a first one-way valve; the intake manifold is connected to the second cavity on the other side of the first working piston through a second one-way valve; the first one-way valve and the second one-way valve are respectively used to limit the one-way flow of the fluid from the intake manifold to the first cavity and the second cavity.

[0015] In some embodiments, an intermediate manifold is further included, wherein the air inlet of the intermediate manifold is connected to the first cavity through a third one-way valve; the air inlet of the intermediate manifold is connected to the second cavity through a fourth one-way valve; the third one-way valve and the fourth one-way valve are respectively used to limit the one-way flow of the fluid in the first cavity and the second cavity toward the intermediate manifold.

[0016] In some embodiments, the gas outlet of the intermediate manifold is connected to the third cavity on one side of the second working piston through a fifth one-way valve;

[0017] The gas outlet of the intermediate manifold is connected to the fourth cavity on the other side of the second working piston through the sixth one-way valve;

[0018] The fifth one-way valve and the sixth one-way valve are used to limit the one-way flow of the fluid from the intermediate manifold to the third cavity and the fourth cavity, respectively.

[0019] In some embodiments, the system further comprises an exhaust manifold, wherein an inlet of the exhaust manifold is connected to the third cavity via a seventh one-way valve;

[0020] The inlet of the exhaust manifold is connected to the fourth cavity through an eighth one-way valve;

[0021] The seventh one-way valve and the eighth one-way valve are respectively used to limit the one-way flow of the fluid from the third cavity and the fourth cavity to the exhaust manifold.

[0022] In some embodiments, the intermediate manifold includes a first straight pipe section, and a first cooling shell is provided on the outside of the first straight pipe section. The first cooling shell extends along the length direction of the high-pressure fluid conveying device and is approximately the same as the length of the high-pressure fluid conveying device; a first annular space is formed between the first straight pipe section and the first cooling shell, and the flow direction of the cooling medium in the first annular space is opposite to the flow direction of the fluid in the first straight pipe section.

[0023] In some embodiments, the exhaust manifold includes a second straight pipe section, and a second cooling shell is provided on the outside of the second straight pipe section. The second cooling shell extends along the length direction of the high-pressure fluid conveying device and is approximately the same as the length of the high-pressure fluid conveying device; a second annular space is formed between the second straight pipe section and the second cooling shell, and the flow direction of the cooling medium in the second annular space is opposite to the flow direction of the fluid in the second straight pipe section.

[0024] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0025] A high-pressure fluid delivery device integrates a first boosting unit and a second boosting unit into a single pump body, reducing equipment acquisition costs. Furthermore, the diameter of the first working piston is larger than that of the second working piston, thereby increasing the boosting capacity of the second boosting unit and balancing the forces on the left and right ends of the piston assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the external structure of a high-pressure fluid delivery pump according to an embodiment of the present utility model.

[0027] Figure 2 This is a front view of a high-pressure fluid delivery pump according to an embodiment of the present invention.

[0028] Figure 3 This is a cross-sectional view of a high-pressure fluid delivery device according to an embodiment of the present invention.

[0029] Figure 4 This is a structural schematic diagram of a high-pressure fluid delivery device according to an embodiment of the present utility model.

[0030] Figure 5 This is a structural schematic diagram of the first straight pipe section in the intermediate manifold in a high-pressure fluid delivery device according to an embodiment of the present utility model.

[0031] Figure 6 for Figure 4 A partial enlarged view of point A in the middle.

[0032] Description of Reference Numerals

[0033] 1-Hydraulic cylinder unit, 101-Hydraulic cylinder barrel, 102-Piston assembly, 1021-Hydraulic piston, 1022-First working piston, 1023-Second working piston, 103-First outer sleeve, 104-Hydraulic cylinder cooling chamber, 2-First booster unit, 201-First working cylinder, 202-Second outer sleeve, 203-First cooling chamber, 3-Second booster unit, 301-Second working cylinder, 302-Third outer sleeve, 303-Second cooling chamber, 4-Intake manifold, 401-First filter, 402-First one-way valve, 403-Second one-way valve, 5-Intermediate manifold, 501-third one-way valve, 502-fourth one-way valve, 503-first cooling shell, 504-fifth one-way valve, 505-sixth one-way valve, 506-first straight pipe section, 6-exhaust manifold, 601-seventh one-way valve, 602-eighth one-way valve, 603-second filter, 604-second cooling shell, 605-third filter, 606-second straight pipe section, 7-first end cover, 8-second end cover, 9-third end cover, 10-fourth end cover, 11-reversing indication trigger, 1101-touch part, 1102-trigger part, 12-reset spring, 13-proximity switch. DETAILED DESCRIPTION

[0034] Other objects and advantages of the present invention will become apparent through explanation of the following preferred embodiments of the present application.

[0035] like Figures 1 to 6 As shown, a high-pressure fluid delivery device includes a first boosting unit 2, a hydraulic cylinder unit 1 and a second boosting unit 3. One end of the hydraulic cylinder unit 1 is connected to the first boosting unit 2, and the other end is connected to the second boosting unit 3.

[0036] The hydraulic cylinder unit 1 includes a hydraulic cylinder barrel 101 and a piston assembly 102; a hydraulic piston 1021 is provided in the middle of the piston assembly 102, a first working piston 1022 is provided at one end, and a second working piston 1023 is provided at the other end; the hydraulic piston 1021, the first working piston 1022 and the second working piston 1023 are coaxially arranged.

[0037] There is a first distance between the first working piston 1022 and the hydraulic piston 1021 ; there is a second distance between the second working piston 1023 and the hydraulic piston 1021 ; the first distance and the second distance are equal.

[0038] The hydraulic piston 1021 is slidably and sealingly connected to the hydraulic cylinder barrel 101. A piston seal is fixed to the hydraulic piston 1021, and the hydraulic piston 1021 is slidably and sealingly connected to the inner surface of the hydraulic cylinder barrel 101 through the piston seal.

[0039] A first outer sleeve 103 is sleeved on the outside of the hydraulic cylinder 101 . A hydraulic cylinder cooling chamber 104 is formed between the hydraulic cylinder 101 and the first outer sleeve 103 . A circulating cooling medium can cool the hydraulic oil in the hydraulic cylinder 101 .

[0040] The first working piston 1022 is slidably and sealedly connected to the first boosting unit 2 ; the second working piston 1023 is slidably and sealedly connected to the second boosting unit 3 .

[0041] The outlet of the first booster unit 2 is connected to the inlet of the second booster unit 3. After being pressurized by the first booster unit 2, the fluid enters the second booster unit for secondary pressurization. This utility model integrates the first and second booster units 2 and 3 on either side of the hydraulic cylinder unit 1 and arranges them coaxially, reducing the size of the equipment and improving space utilization.

[0042] In some embodiments, the diameter of the first working piston 1022 is greater than the diameter of the second working piston 1023 , thereby improving the boosting capacity of the second boosting unit 3 and facilitating balancing the forces on the left and right ends of the piston assembly 102 .

[0043] In some embodiments, the first booster unit 2 includes a first working cylinder 201, with a first working piston 1022 slidably and sealingly connected to the first working cylinder 201. A second outer sleeve 202 is sleeved outside the first working cylinder 201, and a first cooling chamber 203 is defined between the first working cylinder 201 and the first outer sleeve 202. A cooling medium is circulated into the first cooling chamber 203 to cool the first working cylinder 201.

[0044] The second booster unit 3 includes a second working cylinder 301, with a second working piston 1023 slidably and sealingly connected to the second working cylinder 301. A third outer sleeve 302 is positioned outside the second working cylinder 301, with a second cooling chamber 303 defined between the second working cylinder 301 and the third outer sleeve 302. A cooling medium circulated into the second cooling chamber 303 cools the fluid within the second working cylinder 301.

[0045] In some embodiments, it also includes a first end cover 7, a second end cover 8, a third end cover 9 and a fourth end cover 10; the first end cover 7, the first working cylinder 201, the second end cover 8, the hydraulic cylinder barrel 101, the third end cover 9, the second working cylinder 301 and the fourth end cover 10 are connected end to end in sequence.

[0046] In some embodiments, an intake manifold 4 is further included. The intake manifold 4 is connected to the first cavity on one side of the first working piston 1022 via a first one-way valve 402. The intake manifold 4 is connected to the second cavity on the other side of the first working piston 1022 via a second one-way valve 403. The first one-way valve 402 and the second one-way valve 403 are used to limit the flow of fluid from the intake manifold 4 to the first cavity and the second cavity, respectively. Furthermore, a first filter 401 is installed on the intake manifold 4 to filter impurities from the fluid.

[0047] In some embodiments, the high-pressure fluid delivery device further includes an intermediate manifold 5 , the air inlet of which is connected to the first chamber via a third one-way valve 501 ; the air inlet of which is connected to the second chamber via a fourth one-way valve 502 . The third one-way valve 501 and the fourth one-way valve 502 are respectively configured to restrict the fluid in the first and second chambers to flow in one direction toward the intermediate manifold 5 . The intermediate manifold 5 is configured to deliver the high-pressure fluid discharged from the first boosting unit 2 to the second boosting unit 3 .

[0048] In some embodiments, the air outlet of the intermediate manifold 5 is connected to the third cavity on one side of the second working piston 1023 through the fifth one-way valve 504; the air outlet of the intermediate manifold 5 is connected to the fourth cavity on the other side of the second working piston 1023 through the sixth one-way valve 505; the fifth one-way valve 504 and the sixth one-way valve 505 are respectively used to limit the unidirectional flow of fluid from the intermediate manifold 5 to the third cavity and the fourth cavity.

[0049] In some embodiments, an exhaust manifold 6 is further included, the inlet of which is connected to the third chamber via a seventh one-way valve 601; the inlet of which is connected to the fourth chamber via an eighth one-way valve 602. The seventh one-way valve 601 and the eighth one-way valve 602 are respectively used to restrict the flow of fluid from the third chamber and the fourth chamber to the exhaust manifold 6 in one direction.

[0050] The exhaust manifold 6 is connected in series with a right second filter 603 , and the output end of the exhaust manifold 6 is installed with a third filter 605 .

[0051] In some embodiments, as Figure 5 As shown, the intermediate manifold 5 includes a first straight pipe section 506, with a first cooling housing 503 disposed outside the first straight pipe section 506. The first cooling housing 503 extends along the length of the high-pressure fluid conveying device and is approximately the same length as the device, effectively utilizing the space along the length of the device. A first annular space is formed between the first straight pipe section 506 and the first cooling housing 503. The flow direction of the cooling medium in the first annular space is opposite to the flow direction of the fluid in the first straight pipe section 506, thereby improving heat exchange efficiency.

[0052] In some embodiments, similar to the first straight pipe section 506 , the exhaust manifold 6 includes a second straight pipe section 606 . A second cooling housing 604 is provided on the outside of the second straight pipe section 606 . The second cooling housing 604 extends along the length of the high-pressure fluid delivery device and has substantially the same length as the high-pressure fluid delivery device. A second annular space is formed between the second straight pipe section 606 and the second cooling housing 604 . The flow direction of the cooling medium in the second annular space is opposite to the flow direction of the fluid in the second straight pipe section 606 .

[0053] like Figure 6 As shown, in some embodiments, the high-pressure fluid delivery device further includes a reversing indication trigger unit, which includes a reversing indication trigger 11, a return spring 12, and a proximity switch 13. The reversing indication trigger unit is mounted on the fourth end cap 10, wherein the reversing indication trigger 11 is horizontally slidably connected to the fourth end cap 10 and extends through the fourth end cap 10. The reversing indication trigger 11 includes a contact portion 1101 and a trigger portion 1102 symmetrically disposed at both ends of the reversing indication trigger 11 and coaxially disposed. The return spring 12 is located between the contact portion 1101 and the fourth end cap 10. The proximity switch 13 is used to detect the trigger portion 1102.

[0054] The proximity switch 13 is connected to the control unit via a signal, and the control unit is connected to the hydraulic system, and the control unit controls the reciprocating motion of the piston assembly 102 via the hydraulic system. The control unit may be, for example, a PLC.

[0055] When the second working piston 1023 moves to the right end position, it pushes the reversing indication trigger 11 to move to the right, and the trigger part 1102 moves to the right. After the proximity switch 13 detects the trigger part 1102, it sends a signal to the PLC. The PLC controls the hydraulic system to switch the movement direction of the piston assembly 102, thereby realizing the reversal of the piston assembly 102.

[0056] Likewise, a reversing indication trigger unit is provided on the first end cover 7 for detecting whether the piston assembly 102 has moved to the left end limit position.

[0057] The device of the present application is described in detail with reference to the preferred technical solutions of the present application. However, it should be noted that those skilled in the art may make any transformation, modification, and change based on the above disclosure without departing from the spirit of the present application. The present application includes the above specific embodiments and any equivalent forms thereof.

Claims

1. A high-pressure fluid delivery device, characterized in that: It comprises a first boosting unit (2), a hydraulic cylinder unit (1) and a second boosting unit (3), wherein one end of the hydraulic cylinder unit (1) is connected to the first boosting unit (2) and the other end is connected to the second boosting unit (3); The hydraulic cylinder unit (1) comprises a hydraulic cylinder barrel (101) and a piston assembly (102); a hydraulic piston (1021) is provided in the middle of the piston assembly (102), a first working piston (1022) is provided at one end, and a second working piston (1023) is provided at the other end; the hydraulic piston (1021), the first working piston (1022), and the second working piston (1023) are coaxially arranged; The hydraulic piston (1021) is slidably and sealingly connected to the hydraulic cylinder (101); The first working piston (1022) is slidably and sealingly connected to the first boosting unit (2); the second working piston (1023) is slidably and sealingly connected to the second boosting unit (3); The outflow port of the first boosting unit (2) is in communication with the inflow port of the second boosting unit (3).

2. The high-pressure fluid delivery device according to claim 1, wherein: The diameter of the first working piston (1022) is greater than the diameter of the second working piston (1023).

3. The high-pressure fluid delivery device according to claim 2, wherein: The first boosting unit (2) comprises a first working cylinder (201), and the first working piston (1022) is slidably and sealingly connected to the first working cylinder (201); The second boosting unit (3) comprises a second working cylinder (301), and the second working piston (1023) is slidably and sealingly connected to the second working cylinder (301).

4. The high-pressure fluid delivery device according to claim 3, wherein: It also includes a first end cap (7), a second end cap (8), a third end cap (9) and a fourth end cap (10); The first end cover (7), the first working cylinder (201), the second end cover (8), the hydraulic cylinder barrel (101), the third end cover (9), the second working cylinder (301) and the fourth end cover (10) are connected end to end in sequence.

5. The high-pressure fluid delivery device according to any one of claims 1 to 4, characterized in that: The invention also includes an air intake manifold (4), wherein the air intake manifold (4) is connected to a first cavity on one side of the first working piston (1022) through a first one-way valve (402); the air intake manifold (4) is connected to a second cavity on the other side of the first working piston (1022) through a second one-way valve (403); the first one-way valve (402) and the second one-way valve (403) are respectively used to limit the one-way flow of the fluid from the air intake manifold (4) to the first cavity and the second cavity.

6. The high-pressure fluid delivery device according to claim 5, wherein: The invention also includes an intermediate manifold (5), wherein the air inlet of the intermediate manifold (5) is connected to the first cavity via a third one-way valve (501); the air inlet of the intermediate manifold (5) is connected to the second cavity via a fourth one-way valve (502); the third one-way valve (501) and the fourth one-way valve (502) are respectively used to limit the one-way flow of the fluid in the first cavity and the second cavity toward the intermediate manifold (5).

7. The high-pressure fluid delivery device according to claim 6, wherein: The gas outlet of the intermediate manifold (5) is connected to the third cavity on one side of the second working piston (1023) through a fifth one-way valve (504); The gas outlet of the intermediate manifold (5) is connected to the fourth cavity on the other side of the second working piston (1023) through the sixth one-way valve (505); The fifth one-way valve (504) and the sixth one-way valve (505) are used to limit the one-way flow of the fluid from the intermediate manifold (5) to the third cavity and the fourth cavity, respectively.

8. The high-pressure fluid delivery device according to claim 7, wherein: It also includes an exhaust manifold (6), the inlet of the exhaust manifold (6) being connected to the third cavity via a seventh one-way valve (601); The inlet of the exhaust manifold (6) is connected to the fourth cavity via an eighth one-way valve (602); The seventh one-way valve (601) and the eighth one-way valve (602) are respectively used to limit the one-way flow of the fluid from the third cavity and the fourth cavity to the exhaust manifold (6).

9. The high-pressure fluid delivery device according to claim 8, wherein: The intermediate pipe manifold (5) includes a first straight pipe section (506), a first cooling shell (503) is provided on the outer side of the first straight pipe section (506), and the first cooling shell (503) extends along the length direction of the high-pressure fluid conveying device and is substantially the same length as the high-pressure fluid conveying device; a first annular space is formed between the first straight pipe section (506) and the first cooling shell (503), and the flow direction of the cooling medium in the first annular space is opposite to the flow direction of the fluid in the first straight pipe section (506).

10. The high-pressure fluid delivery device according to claim 8, wherein: The exhaust manifold (6) includes a second straight pipe section (606), and a second cooling shell (604) is provided on the outer side of the second straight pipe section (606). The second cooling shell (604) extends along the length direction of the high-pressure fluid conveying device and is substantially the same as the length of the high-pressure fluid conveying device; a second annular space is formed between the second straight pipe section (606) and the second cooling shell (604), and the flow direction of the cooling medium in the second annular space is opposite to the flow direction of the fluid in the second straight pipe section (606).

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