Single-action two-stage hydraulic drive compressor system

Abstract

The utility model relates to the technical field of liquid-driven compressors, in particular to a single-action two-stage liquid-driven compressor system. Comprising a hydraulic driving cylinder, a first-stage compression air cylinder and a second-stage compression air cylinder are arranged on the two sides of the hydraulic driving cylinder respectively, a first exhaust cooler is arranged on a gas conveying pipeline, a second exhaust cooler is arranged on a high-pressure gas pipeline, and water cooling channels are formed in the cylinder walls of the first-stage compression air cylinder and the second-stage compression air cylinder respectively. A water inlet of the second-stage compression air cylinder is connected with a cooling water inlet pipeline, a water outlet of the second-stage compression air cylinder is connected with a water inlet of the first-stage compression air cylinder through a cooling water conveying pipeline, and a water outlet of the first-stage compression air cylinder is connected with a cooling water outlet pipeline. Cooling operation can be conducted inside and outside the first-stage compression air cylinder and the second-stage compression air cylinder, so that sealing pieces on the first-stage air cavity piston and the second-stage air cavity piston are protected, the service life is prolonged, the frequency of shutdown maintenance and replacement is reduced, and normal operation of the compressor is guaranteed.

Description

Technical fields:

[0001] This utility model relates to the field of liquid-driven compressor technology, and in particular to a single-acting two-stage liquid-driven compressor system. Background technology:

[0002] Currently, compressors pressurize gas by driving a piston inside the compressor to reciprocate through a drive mechanism. This drive mechanism can be a crankshaft connecting rod or hydraulic drive. In hydraulically driven compressors, most are single-stage compressors, which are prone to insufficient gas pressure. While some multi-stage compressors can achieve the required gas pressure, the gas temperature also rises during pressurization; the higher the gas pressure, the higher the corresponding temperature. This can lead to excessively high compressor cylinder temperatures. The piston relies primarily on seals on its outer surface to seal the gas during reciprocating motion. Excessive temperature severely affects the lifespan of these seals, and seal failure can cause leaks, pressurization failure, and other problems, requiring frequent shutdowns for maintenance and replacement, thus disrupting the compressor's normal operation. Currently, there is no good solution to these problems.

[0003] In summary, the problem of excessively high temperature of compressed gas in multi-stage compressors has become a technical challenge that urgently needs to be addressed in the industry. Utility Model Content:

[0004] To overcome the shortcomings of the prior art, this utility model provides a single-acting two-stage liquid-driven compressor system, which solves the problem of piston seal failure caused by increased gas pressure and excessively high gas temperature in previous multi-stage compressors.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A single-acting two-stage hydraulically driven compressor system includes a hydraulically driven cylinder. A primary compression cylinder and a secondary compression cylinder are respectively located on both sides of the hydraulically driven cylinder. The inlet of the primary compression cylinder is connected to a low-pressure gas pipeline, and the outlet of the primary compression cylinder is connected to the inlet of the secondary compression cylinder via a gas delivery pipeline. The outlet of the secondary compression cylinder is connected to a high-pressure gas pipeline. A first exhaust cooler is located on the gas delivery pipeline, and a second exhaust cooler is located on the high-pressure gas pipeline. The inlets of the first and second exhaust coolers are respectively connected to a cooling water inlet pipeline, and the outlets of the first and second exhaust coolers are respectively connected to a cooling water outlet pipeline. Water-cooling channels are respectively provided within the cylinder walls of the primary and secondary compression cylinders. The inlet of the secondary compression cylinder is connected to the cooling water inlet pipeline, and the outlet of the secondary compression cylinder is connected to the inlet of the primary compression cylinder via a cooling water delivery pipeline. The outlet of the primary compression cylinder is connected to the cooling water outlet pipeline.

[0007] The hydraulic oil for the hydraulic drive cylinder is supplied by a variable displacement piston pump.

[0008] Pressure sensors and temperature sensors are respectively installed on the low-pressure gas pipeline, the gas delivery pipeline, and the high-pressure gas pipeline.

[0009] The low-pressure gas pipeline is equipped with a manual ball valve, a pneumatic ball valve, and a filter.

[0010] The high-pressure gas pipeline is equipped with a manual ball valve, a pneumatic ball valve, and a check valve.

[0011] Safety valves are installed on the gas delivery pipeline and the high-pressure gas pipeline, and the safety valves are connected to the venting pipeline.

[0012] The hydraulic drive cylinder is equipped with a hydraulic piston, the primary compression cylinder is equipped with a primary air chamber piston, and the secondary compression cylinder is equipped with a secondary air chamber piston. The two sides of the hydraulic piston are connected to the primary air chamber piston and the secondary air chamber piston respectively through piston rods.

[0013] The present invention adopts the above solution and has the following advantages:

[0014] By installing a first exhaust cooler on the gas delivery pipeline, the gas pressurized by the first-stage compressor is cooled to reduce the temperature of the gas entering the second-stage compressor. Similarly, a second exhaust cooler on the high-pressure gas pipeline cools the gas pressurized by the second-stage compressor to meet operating temperatures. The combined use of the first and second exhaust coolers enables temperature control of the internal gas. Furthermore, because the gas pressure and temperature in the second-stage compressor are higher, cooling water from the cooling water inlet pipeline first enters the water-cooling channel within the second-stage compressor wall to cool it. Then, the cooling water flows through the cooling water delivery pipeline into the water-cooling channel within the first-stage compressor wall to cool it as well. This achieves external cooling of both the first and second-stage compressors. Cooling can be performed both internally and externally on both the first and second-stage compressors, protecting the seals on the pistons of the first and second stages, extending their service life, reducing downtime for maintenance and replacement, and ensuring the normal operation of the compressor. Attached image description:

[0015] Figure 1 This is a schematic diagram of the structural principle of this utility model.

[0016] In the diagram, 1. Hydraulic drive cylinder, 2. Primary compression cylinder, 3. Secondary compression cylinder, 4. Low-pressure gas pipeline, 5. Gas delivery pipeline, 6. High-pressure gas pipeline, 7. First exhaust cooler, 8. Second exhaust cooler, 9. Cooling water inlet pipeline, 10. Cooling water outlet pipeline, 11. Cooling water delivery pipeline, 12. Pressure sensor, 13. Temperature sensor, 14. Manual ball valve, 15. Pneumatic ball valve, 16. Filter, 17. Check valve, 18. Safety valve, 19. Vent pipeline, 20. Hydraulic piston, 21. Primary air chamber piston, 22. Secondary air chamber piston, 23. Piston rod. Detailed implementation method:

[0017] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, a single-acting two-stage hydraulically driven compressor system includes a hydraulically driven cylinder 1. A primary compression cylinder 2 and a secondary compression cylinder 3 are respectively located on both sides of the hydraulically driven cylinder 1. The inlet of the primary compression cylinder 2 is connected to a low-pressure gas pipeline 4, and the outlet of the primary compression cylinder 2 is connected to the inlet of the secondary compression cylinder 3 via a gas delivery pipeline 5. The outlet of the secondary compression cylinder 3 is connected to a high-pressure gas pipeline 6. A first exhaust cooler 7 is installed on the gas delivery pipeline 5, and a second exhaust cooler 8 is installed on the high-pressure gas pipeline 6. The first exhaust cooler... The inlets of the first exhaust cooler 7 and the second exhaust cooler 8 are connected to the cooling water inlet pipe 9, respectively. The outlets of the first exhaust cooler 7 and the second exhaust cooler 8 are connected to the cooling water outlet pipe 10, respectively. Water cooling channels are provided in the cylinder walls of the first-stage compression cylinder 2 and the second-stage compression cylinder 3, respectively. The inlet of the second-stage compression cylinder 3 is connected to the cooling water inlet pipe 9, and the outlet of the second-stage compression cylinder 3 is connected to the inlet of the first-stage compression cylinder 2 through the cooling water delivery pipe 11. The outlet of the first-stage compression cylinder 2 is connected to the cooling water outlet pipe 10.

[0019] The hydraulic oil of the hydraulic drive cylinder 1 is supplied by a variable displacement piston pump to drive the hydraulic piston 20 to reciprocate left and right.

[0020] Pressure sensor 12 and temperature sensor 13 are respectively installed on the low-pressure gas pipeline 4, gas delivery pipeline 5 and high-pressure gas pipeline 6 to facilitate real-time detection of gas pressure and temperature.

[0021] The low-pressure gas pipeline 4 is equipped with a manual ball valve 14, a pneumatic ball valve 15, and a filter 16. The filter 16 can filter the low-pressure gas.

[0022] The high-pressure gas pipeline 6 is equipped with a manual ball valve 14, a pneumatic ball valve 15, and a check valve 17. The check valve 17 can prevent high-pressure gas from returning.

[0023] Safety valves 18 are respectively installed on the gas delivery pipeline 5 and the high-pressure gas pipeline 6. The safety valves 18 are connected to the venting pipeline 19 and can prevent system pressure overload.

[0024] The hydraulic drive cylinder 1 is equipped with a hydraulic piston 20, the primary compression cylinder 2 is equipped with a primary air chamber piston 21, and the secondary compression cylinder 3 is equipped with a secondary air chamber piston 22. The two sides of the hydraulic piston 20 are connected to the primary air chamber piston 21 and the secondary air chamber piston 22 respectively through piston rods 23.

[0025] Working principle:

[0026] During operation, hydraulic oil is supplied to hydraulic drive cylinder 1 via a variable displacement piston pump to drive hydraulic piston 20 to reciprocate left and right. When hydraulic oil chamber B is filled with high-pressure hydraulic oil, the middle hydraulic piston 20 moves from right to left, causing piston rod 23 to also move to the left. The first-stage compression cylinder 2's first-stage chamber piston 21 compresses and discharges gas to the left. The gas passes through the first exhaust cooler 7 and enters the second-stage compression cylinder 3. When the middle hydraulic piston 20 moves to a certain position to the left, the sensor receives a signal. At this time, the external hydraulic system receives a reversal signal, and high-pressure hydraulic oil begins to fill hydraulic oil chamber A. Hydraulic piston 20 begins to move from left to right, and the second-stage chamber piston 22 in the second-stage compression cylinder 3 begins to compress the cooled gas until hydraulic piston 20 reaches the right stop position. The high-pressure gas discharged from the second-stage compression cylinder 3 passes through the second exhaust cooler 8 and smoothly enters the container specified by the customer.

[0027] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0028] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A single-acting two-stage hydraulically driven compressor system, characterized in that: The system includes a hydraulically driven cylinder, with a primary compression cylinder and a secondary compression cylinder on each side. The inlet of the primary compression cylinder is connected to a low-pressure gas pipeline, and the outlet of the primary compression cylinder is connected to the inlet of the secondary compression cylinder via a gas delivery pipeline. The outlet of the secondary compression cylinder is connected to a high-pressure gas pipeline. A first exhaust cooler is installed on the gas delivery pipeline, and a second exhaust cooler is installed on the high-pressure gas pipeline. The inlets of the first and second exhaust coolers are connected to a cooling water inlet pipeline, and the outlets of the first and second exhaust coolers are connected to a cooling water outlet pipeline. Water-cooling channels are provided inside the cylinder walls of both the primary and secondary compression cylinders. The inlet of the secondary compression cylinder is connected to a cooling water inlet pipeline, and the outlet of the secondary compression cylinder is connected to the inlet of the primary compression cylinder via a cooling water delivery pipeline. The outlet of the primary compression cylinder is connected to a cooling water outlet pipeline.

2. The single-acting two-stage hydraulically driven compressor system according to claim 1, characterized in that: The hydraulic oil for the hydraulic drive cylinder is supplied by a variable displacement piston pump.

3. The single-acting two-stage hydraulically driven compressor system according to claim 1, characterized in that: Pressure sensors and temperature sensors are respectively installed on the low-pressure gas pipeline, the gas delivery pipeline, and the high-pressure gas pipeline.

4. The single-acting two-stage hydraulically driven compressor system according to claim 1, characterized in that: The low-pressure gas pipeline is equipped with a manual ball valve, a pneumatic ball valve, and a filter.

5. A single-acting two-stage hydraulically driven compressor system according to claim 1, characterized in that: The high-pressure gas pipeline is equipped with a manual ball valve, a pneumatic ball valve, and a check valve.

6. A single-acting two-stage hydraulically driven compressor system according to claim 1, characterized in that: Safety valves are installed on the gas delivery pipeline and the high-pressure gas pipeline, and the safety valves are connected to the venting pipeline.

7. A single-acting two-stage hydraulically driven compressor system according to claim 1, characterized in that: The hydraulic drive cylinder is equipped with a hydraulic piston, the primary compression cylinder is equipped with a primary air chamber piston, and the secondary compression cylinder is equipped with a secondary air chamber piston. The two sides of the hydraulic piston are connected to the primary air chamber piston and the secondary air chamber piston respectively through piston rods.

Images