Hydraulic drive reciprocating type mixed-phase pressure cylinder

Abstract

The utility model discloses a hydraulic drive reciprocating type mixed-phase pressure cylinder which comprises a first-stage cylinder, a driving cylinder and a second-stage cylinder which are connected in sequence. A first pressure limiting one-way valve is arranged at the end, away from the driving cylinder, of the first-stage cylinder, a second pressure limiting one-way valve is arranged at the end, away from the driving cylinder, of the second-stage cylinder, and a connecting pipeline is arranged between one end of the first pressure limiting one-way valve and one end of the second pressure limiting one-way valve. The connecting pipeline can input a medium output by the first-stage cylinder through the first pressure limiting one-way valve into the second-stage cylinder through the second pressure limiting one-way valve. A first push rod is arranged between the primary cylinder and the driving cylinder, a second push rod is arranged between the secondary cylinder and the driving cylinder, and the first push rod is linked with the second push rod. Output of liquid-phase media, gas-phase media and mixed-phase media can be completed through one device, practicability is high, and application and popularization are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic boosters, and in particular to a hydraulically driven reciprocating mixed-phase booster cylinder. Background Technology

[0002] 1. When the liquid phase booster cylinder compresses the liquid phase medium, it can normally reach the design parameters of the booster cylinder. However, when the gas phase medium enters the inlet of the booster cylinder, the output medium flow rate and pressure value of the booster cylinder will drop significantly, and it will not be able to reach the design parameters of the booster cylinder.

[0003] 2. When the gas phase booster cylinder compresses the gas phase medium, it can normally reach the design parameters of the booster cylinder. However, when the booster cylinder is in normal operation, if the liquid phase medium enters the inlet of the booster cylinder, the load on the booster cylinder will increase because the liquid phase medium is not compressible. Therefore, the booster cylinder will overload and shut down (or overload burn out the drive motor).

[0004] Third, when a gas-liquid mixed medium enters a traditional booster cylinder, it also cannot function properly.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a liquid-driven reciprocating mixed-phase booster cylinder capable of pressurizing different media.

[0007] To achieve the above objectives, this utility model provides a liquid-driven reciprocating mixed-phase booster cylinder, comprising: a primary cylinder, a drive cylinder, and a secondary cylinder connected in sequence; a first pressure-limiting one-way valve is provided at the end of the primary cylinder away from the drive cylinder, and a second pressure-limiting one-way valve is provided at the end of the secondary cylinder away from the drive cylinder; a connecting pipe is provided between one end of the first pressure-limiting one-way valve and one end of the second pressure-limiting one-way valve, and the connecting pipe can input the medium output from the primary cylinder through the first pressure-limiting one-way valve into the secondary cylinder through the second pressure-limiting one-way valve; a first push rod is provided between the primary cylinder and the drive cylinder, and a second push rod is provided between the secondary cylinder and the drive cylinder, and the first push rod and the second push rod are linked.

[0008] In one or more embodiments, the first push rod includes a first-stage cylinder piston disposed in the first-stage cylinder, a drive cylinder piston disposed in the drive cylinder, and a first-stage cylinder piston push rod connecting one end of the first-stage cylinder piston and the drive cylinder piston.

[0009] In one or more embodiments, the second push rod comprises a second cylinder piston arranged in the second cylinder, the drive cylinder piston arranged in the drive cylinder, and a second cylinder piston push rod connecting the second cylinder piston and the other end of the drive cylinder piston.

[0010] In one or more embodiments, the first cylinder comprises a cylindrical first cylinder body, and two first end covers respectively located at the ends of the first cylinder body; the second cylinder comprises a cylindrical second cylinder body, and two second end covers respectively located at the ends of the second cylinder body; the drive cylinder comprises a cylindrical third cylinder body, and two third end covers respectively located at the ends of the third cylinder body.

[0011] In one or more embodiments, the radius of the first cylinder is greater than the radius of the second cylinder, and the height of the first cylinder is equal to the height of the second cylinder.

[0012] In one or more embodiments, the first pressure-limiting one-way valve is located on the first end cover away from the drive cylinder, and the second pressure-limiting one-way valve is located on the second end cover away from the drive cylinder.

[0013] In one or more embodiments, the other end of the first pressure-limiting one-way valve is connected with a first pipe and an inlet flange in sequence.

[0014] In one or more embodiments, the other end of the second pressure-limiting one-way valve is connected with a second pipe and an outlet flange in sequence.

[0015] In one or more embodiments, a sealing member is arranged between the first end cover and the first cylinder, and between the second end cover and the second cylinder, respectively.

[0016] In one or more embodiments, a sealing member is arranged between the first cylinder piston and the first cylinder, and between the second cylinder piston and the second cylinder, respectively.

[0017] The utility model provides a kind of liquid drive reciprocating mixed phase pressure intensifier cylinder, setting drive cylinder, the two sides of drive cylinder coaxially are provided with primary cylinder and secondary cylinder, the radius of primary cylinder is greater than the radius of secondary cylinder, so that the volume of primary cylinder is greater than the volume of secondary cylinder.Primary cylinder, drive cylinder and secondary cylinder are equipped with first push rod and second push rod, connecting pipeline is equipped between primary cylinder and secondary cylinder, first pipeline and inlet flange of medium input are connected to primary cylinder, second pipeline and outlet flange of medium output are connected to secondary cylinder.Make push rod movement, drive compression in primary cylinder, secondary cylinder is in suction state, medium is input into secondary cylinder by connecting pipeline.When secondary cylinder is in compression state, primary cylinder is in suction state, medium in secondary cylinder is output by second pipeline, and primary cylinder is inhaled medium from first pipeline.At the same time, first pressure-limiting one-way valve is equipped on primary cylinder, and second pressure-limiting one-way valve is equipped on secondary cylinder, when compressing gas-phase medium, the initial pressure in secondary cylinder increases when medium is compressed from primary cylinder into secondary cylinder, and high-pressure output medium can be obtained at the output end of secondary cylinder when being compressed again.When compressing liquid-phase medium, the pressure in primary cylinder increases, and first pressure-limiting one-way valve is automatically relieved for primary cylinder when exceeding defined pressure, to ensure that drive cylinder operates within designed load.When medium is gas-liquid mixed phase, pressure can be regulated according to needs, to ensure that drive cylinder operates within designed load, to ensure that the whole system can operate smoothly.One device can be used to complete the output of liquid-phase medium, gas-phase medium and mixed-phase medium, with strong practicability and convenient for popularization and use. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure schematic diagram of the liquid drive reciprocating mixed phase pressure intensifier cylinder provided in the utility model embodiment.

[0019] MAIN REFERENCE NUMERALS EXPLANATION:

[0020] 1-primary cylinder, 11-first pressure-limiting one-way valve, 12-first cylinder body, 13-first end cover, 14-first pipeline, 15-inlet flange, 2-drive cylinder, 21-third cylinder body, 22-third end cover, 3-secondary cylinder, 31-second pressure-limiting one-way valve, 32-second cylinder body, 33-second end cover, 34-second pipeline, 35-outlet flange, 4-connecting pipeline, 5-first push rod, 51-primary cylinder piston, 52-drive cylinder piston, 53-primary cylinder piston push rod, 6-second push rod, 61-secondary cylinder piston, 62-secondary cylinder piston push rod, 7-sealing element. DETAILED DESCRIPTION

[0021] The specific embodiments of the utility model are described in detail below in combination with the drawings, but it should be understood that the protection scope of the utility model is not limited by the specific embodiments.

[0022] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0023] A liquid-driven reciprocating mixed-phase booster cylinder, such as Figure 1 As shown, it includes: a primary cylinder 1, a drive cylinder 2, and a secondary cylinder 3 connected in sequence; the primary cylinder 1 is provided with a first pressure-limiting one-way valve 11 at the end away from the drive cylinder 2, and the secondary cylinder 3 is provided with a second pressure-limiting one-way valve 31 at the end away from the drive cylinder 2; a connecting pipe 4 is provided between one end of the first pressure-limiting one-way valve 11 and one end of the second pressure-limiting one-way valve 31, and the connecting pipe 4 can input the medium output from the primary cylinder 1 through the first pressure-limiting one-way valve 11 into the secondary cylinder 3 through the second pressure-limiting one-way valve 31; a first push rod 5 is provided between the primary cylinder 1 and the drive cylinder 2, and a second push rod 6 is provided between the secondary cylinder 3 and the drive cylinder 2, and the first push rod 5 and the second push rod 6 are linked.

[0024] Specifically, the primary cylinder 1, the drive cylinder 2, and the secondary cylinder 3 are cylindrical and coaxially connected. One side of the drive cylinder 2 is connected to the primary cylinder 1, and the other side is connected to the secondary cylinder 3. Before use, the pressure of the first pressure-limiting one-way valve 11 needs to be set to prevent the pressure of the primary cylinder 1 from exceeding the limit. The first pressure-limiting one-way valve 11 can automatically release pressure to the primary cylinder 1 after exceeding the set pressure. The linkage between the first push rod 5 and the second push rod 6 means that when the first push rod 5 moves to one side, the second push rod 6 moves in the same direction. As a preferred embodiment, the first pressure-limiting one-way valve 11 and the second pressure-limiting one-way valve 31 are HD-CPO series pressure-limiting one-way valves.

[0025] As an optional implementation, the first push rod 5 includes a first-stage cylinder piston 51 disposed in the first-stage cylinder 1, a drive cylinder piston 52 disposed in the drive cylinder 2, and a first-stage cylinder piston push rod 53 connecting one end of the first-stage cylinder piston 51 and the drive cylinder piston 52.

[0026] Specifically, the diameter of the primary cylinder piston 51 matches the inner diameter of the first cylinder body 12, the diameter of the secondary cylinder piston 61 matches the inner diameter of the second cylinder body 32, and the inner diameter of the driving cylinder piston 52 matches the third cylinder body 21. As a preferred embodiment, the first push rod 5 and the second push rod 6 constitute an integral linkage push rod, which includes the primary cylinder piston 51 in the primary cylinder 1, the driving cylinder piston 52 in the driving cylinder 2, and the secondary cylinder piston 61 in the secondary cylinder 3. One end of the primary cylinder piston 51 and the driving cylinder piston 52 is connected with the primary cylinder piston push rod 53, and the other end of the secondary cylinder piston 61 and the driving cylinder piston 52 is connected with the secondary cylinder piston push rod 62.

[0027] As an optional embodiment, the second push rod 6 includes the secondary cylinder piston 61 arranged in the secondary cylinder, the driving cylinder piston 52 arranged in the driving cylinder 2, and the secondary cylinder piston push rod 62 connected to the other end of the secondary cylinder piston 61 and the driving cylinder piston 52.

[0028] Specifically, the side of the driving cylinder 2 close to the primary cylinder 1 is set as the A cavity, and the side close to the secondary cylinder 3 is set as the B cavity. When the hydraulic drive system supplies oil to the B cavity of the driving cylinder 2, the driving cylinder piston 52 moves towards the A cavity, and drives the primary cylinder piston 51 to move in the same direction through the primary cylinder piston push rod 53. At this time, the volume of the primary cylinder 1 decreases, and the medium in the primary cylinder 1 is discharged through the first pressure limiting one-way valve 11, enters the secondary cylinder 3 through the connecting pipeline 4, and the secondary cylinder piston 61 moves in the same direction. At this time, the volume of the secondary cylinder 3 increases, and the medium discharged from the primary cylinder 1 is sucked. When the hydraulic drive system supplies oil to the A cavity of the driving cylinder 2, the driving cylinder piston 52 moves towards the B cavity, and at this time, the secondary cylinder 3 is in the medium compression state, and the medium in the secondary cylinder 3 is discharged through the second pressure limiting one-way valve 31. At this time, the primary cylinder piston 51 moves in the same direction, and the volume of the primary cylinder 1 increases to suck the medium from the inlet flange 15 and the first pipeline 14. Such a cycle alternately supplies oil to the driving cylinder 2, and the pressure cylinder alternately reciprocates to realize the working process of continuously sucking, compressing and discharging the medium, and to realize the purpose of medium pressure boosting.

[0029] As an optional embodiment, the primary cylinder 1 includes a cylindrical first cylinder body 12, and two first end covers 13 respectively located at the end of the two sides of the first cylinder body 12; the secondary cylinder 3 includes a cylindrical second cylinder body 32, and two second end covers 33 respectively located at the end of the two sides of the second cylinder body 32; and the driving cylinder 2 includes a cylindrical third cylinder body 21, and two third end covers 22 respectively located at the end of the two sides of the third cylinder body 21.

[0030] Specifically, one of the first end covers 13 is provided with a first pressure-limiting one-way valve 11, another of the first end covers 13 is connected with one of the third end covers 22, another of the third end covers 22 is connected with one of the second end covers 33, and another of the second end covers 33 is provided with a second pressure-limiting one-way valve 31.

[0031] As an optional implementation, the radius of the primary cylinder 1 is greater than the radius of the secondary cylinder 3, and the height of the primary cylinder 1 is equal to the height of the secondary cylinder 3.

[0032] Specifically, in order to meet the working conditions of multi-phase medium with one supercharged cylinder, the supercharged cylinder is designed as a two-stage supercharger, the cylinder capacity of the primary cylinder 1 is large, and the cylinder capacity of the secondary cylinder 3 is small. The radius of the primary cylinder 1 is greater than the radius of the secondary cylinder 3, and when the gaseous medium is compressed, the gaseous medium in the primary cylinder 1 can be fully compressed and enter the secondary cylinder 3; when the liquid medium is compressed, because the volume of the primary cylinder 1 is large (the length is the same, the diameter of the primary cylinder 1 is large, and the diameter of the secondary cylinder 3 is small), and the liquid medium is incompressible, the secondary cylinder 3 cannot fully accommodate, which will cause the primary cylinder 1 to output overpressure, thereby increasing the pressure in the primary cylinder 1, exceeding the set pressure of the first pressure-limiting one-way valve 11, and the first pressure-limiting one-way valve 11 will automatically release the pressure of the primary cylinder 1, ensuring that the driving cylinder 2 operates within the designed load, thereby ensuring that the entire system can operate smoothly.

[0033] As an optional implementation, the first pressure-limiting one-way valve 11 is located on the first end cover 13 away from the driving cylinder 2, and the second pressure-limiting one-way valve 31 is located on the second end cover 33 away from the driving cylinder 2.

[0034] Specifically, the first pressure-limiting one-way valve 11 is connected with a first pipeline 14 on one side and connected with one side of the connecting pipeline 4 on the other side, and the second pressure-limiting one-way valve 31 is connected with a second pipeline 34 on one side and connected with the other side of the connecting pipeline 4 on the other side.

[0035] As an optional implementation, the other end of the first pressure-limiting one-way valve 11 is sequentially connected with the first pipeline 14 and the inlet flange 15.

[0036] As an optional implementation, the other end of the second pressure-limiting one-way valve 31 is sequentially connected with the second pipeline 34 and the outlet flange 35.

[0037] Specifically, when the piston moves to the B side, the volume of the primary cylinder 1 increases, and the medium is input into the primary cylinder 1 through the inlet flange 15 along the first pipeline 14 and through one side of the first pressure-limiting one-way valve 11, at this time the secondary cylinder 3 is compressed, and the medium in the secondary cylinder 3 is output to the outlet flange 35 along the second pipeline 34 through the other side of the second pressure-limiting one-way valve 31. Then the piston moves to the A side, the primary cylinder 1 is compressed, and the volume of the secondary cylinder 3 increases, the medium in the primary cylinder 1 is discharged through the other side of the first pressure-limiting one-way valve 11 along the connecting channel and input into the secondary cylinder 3 through one side of the second pressure-limiting one-way valve 31.

[0038] As an optional implementation, a sealing member 7 is arranged between the first end cover 13 and the primary cylinder 1, and between the second end cover 33 and the secondary cylinder 3, respectively.

[0039] As an optional implementation, a sealing member 7 is arranged between the primary cylinder piston 51 and the primary cylinder 1, and between the secondary cylinder piston 61 and the secondary cylinder 3, respectively.

[0040] Specifically, a sealing member 7 is arranged between each end cover and cylinder to increase the sealing performance of the end cover.

[0041] By adopting the above technical scheme, the driving cylinder 2 is arranged, coaxial first-stage cylinder 1 and second-stage cylinder 3 are arranged on two sides of the driving cylinder 2, the radius of the first-stage cylinder 1 is greater than the radius of the second-stage cylinder 3, so that the volume of the first-stage cylinder 1 is greater than the volume of the second-stage cylinder 3. The first-stage cylinder 1, the driving cylinder 2 and the second-stage cylinder 3 are internally provided with the first push rod 5 and the second push rod 6 connected in a linkage mode, the connecting pipeline 4 is arranged between the first-stage cylinder 1 and the second-stage cylinder 3, the first-stage cylinder 1 is connected with the first pipeline 14 and the inlet flange 15 for input of the medium, and the second-stage cylinder 3 is connected with the second pipeline 34 and the outlet flange 35 for output of the medium. When the push rod moves and drives the first-stage cylinder 1 to compress, the second-stage cylinder 3 is in a suction state, and the medium is input into the second-stage cylinder 3 through the connecting pipeline 4. When the second-stage cylinder 3 is in a compression state, the first-stage cylinder 1 is in a suction state, the medium in the second-stage cylinder 3 is output through the second pipeline 34, and the first-stage cylinder 1 sucks the medium from the first pipeline 14. Meanwhile, the first-stage cylinder 1 is provided with the first pressure-limiting one-way valve 11, and the second-stage cylinder 3 is provided with the second pressure-limiting one-way valve 31. When the medium is compressed in a gaseous phase, the initial pressure in the second-stage cylinder 3 increases when the medium is compressed from the first-stage cylinder 1 into the second-stage cylinder 3, and the medium with high-pressure output can be obtained at the output end of the second-stage cylinder 3 when the medium is compressed in the second-stage cylinder 3. When the medium is compressed in a liquid phase, the pressure in the first-stage cylinder 1 increases, the first pressure-limiting one-way valve 11 automatically releases the pressure of the first-stage cylinder 1 when the pressure exceeds the limited pressure, and the driving cylinder 2 can run in the designed load. When the medium is in a mixed phase, the pressure can also be adjusted and controlled according to the needs, the driving cylinder 2 can run in the designed load, and the whole system can run stably. One device can be used to complete the output of the liquid-phase medium, the gaseous-phase medium and the mixed-phase medium, and the device has high practicability and is convenient to use and popularize.

[0042] The foregoing description of specific exemplary embodiments of the present application is intended to be illustrative only and is not intended to limit the present application to the precise forms described. Many modifications and variations are possible in light of the above teachings without departing from the spirit or essential characteristics of the present application. The exemplary embodiments were chosen and described in order to explain the principles of the present application and its practical application and to allow others skilled in the art to understand the present application for various exemplary embodiments with various modifications as are suited to the particular use contemplated. The scope of the present application is intended to be defined by the claims and their equivalents.

Claims

1. A liquid-driven reciprocating mixed-phase booster cylinder, characterized in that, include: The first-stage cylinder, the drive cylinder, and the second-stage cylinder are connected in sequence. The first-stage cylinder is provided with a first pressure-limiting one-way valve at the end away from the drive cylinder, and the second-stage cylinder is provided with a second pressure-limiting one-way valve at the end away from the drive cylinder. A connecting pipe is provided between one end of the first pressure-limiting one-way valve and one end of the second pressure-limiting one-way valve. The connecting pipe can input the medium output from the first-stage cylinder through the first pressure-limiting one-way valve into the second-stage cylinder through the second pressure-limiting one-way valve. A first push rod is provided between the first-stage cylinder and the drive cylinder, and a second push rod is provided between the second-stage cylinder and the drive cylinder; the first push rod and the second push rod are linked together. The other end of the first pressure-limiting one-way valve is connected to the first pipeline and the inlet flange in sequence; the other end of the second pressure-limiting one-way valve is connected to the second pipeline and the outlet flange in sequence.

2. The hydraulically driven reciprocating mixed-phase booster cylinder as described in claim 1, characterized in that, The first push rod includes a first-stage cylinder piston disposed in the first-stage cylinder, a drive cylinder piston disposed in the drive cylinder, and a first-stage cylinder piston push rod connecting one end of the first-stage cylinder piston and the drive cylinder piston.

3. The liquid-driven reciprocating mixed-phase booster cylinder as described in claim 2, characterized in that, The second push rod includes a second-stage cylinder piston disposed in the second-stage cylinder, a drive cylinder piston disposed in the drive cylinder, and a second-stage cylinder piston push rod connecting the other end of the second-stage cylinder piston and the drive cylinder piston.

4. The hydraulically driven reciprocating mixed-phase booster cylinder as described in claim 1, characterized in that, The first-stage cylinder includes a cylindrical first cylinder body and two first end caps, which are located at the ends of the first cylinder body on both sides. The second-stage cylinder includes a cylindrical second cylinder body and two second end caps, which are located at the ends of the second cylinder body on both sides. The drive cylinder includes a cylindrical third cylinder body and two third end caps, which are located at the ends of the third cylinder body on both sides.

5. A liquid-driven reciprocating mixed-phase booster cylinder as described in claim 4, characterized in that, The radius of the first-stage cylinder is greater than the radius of the second-stage cylinder, and the height of the first-stage cylinder is equal to the height of the second-stage cylinder.

6. A liquid-driven reciprocating mixed-phase booster cylinder as described in claim 4, characterized in that, The first pressure-limiting one-way valve is located on the first end cap on the side away from the drive cylinder, and the second pressure-limiting one-way valve is located on the second end cap on the side away from the drive cylinder.

7. A hydraulically driven reciprocating mixed-phase booster cylinder as described in claim 4, characterized in that, A sealing element is provided between the first end cap and the first-stage cylinder, and between the second end cap and the second-stage cylinder.

8. A liquid-driven reciprocating mixed-phase booster cylinder as described in claim 3, characterized in that, A seal is provided between the piston of the first-stage cylinder and between the piston of the second-stage cylinder and between the piston of the second-stage cylinder.

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