Single-action double-head hydraulic drive compressor system

Abstract

The utility model relates to the technical field of hydraulically-driven compressors, in particular to a single-action double-head hydraulically-driven compressor system. Comprising a hydraulic driving cylinder, a first compression air cylinder and a second compression air cylinder are arranged on the two sides of the hydraulic driving cylinder respectively, air inlets of the first compression air cylinder and the second compression air cylinder are connected with a low-pressure gas pipeline respectively, and air outlets of the first compression air cylinder and the second compression air cylinder are connected with a high-pressure gas pipeline respectively. And an exhaust cooler is arranged on the high-pressure gas pipeline. When a hydraulic piston of the hydraulic driving cylinder moves left and right, the first compression air cylinder and the second compression air cylinder can be driven to work to pressurize air, so that the compression efficiency is improved, low-temperature air enters the first compression air cylinder and the second compression air cylinder, and water cooling operation can be conducted outside. Therefore, sealing pieces on the first air cavity piston and the second 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 field:

[0001] The utility model relates to the technical field of liquid-driven compressors, in particular to a single-acting double-head liquid-driven compressor system. Background technology:

[0002] At present, when a compressor pressurizes gas, it drives the piston inside the compressor to reciprocate through a driving mechanism to achieve gas pressurization. The driving mechanism includes a crankshaft connecting rod or hydraulic drive. In the case of hydraulic drive, most compressors on the market are single-stage compression. The liquid-driven piston does not do work during the return stroke, and the compression efficiency is low. For some multi-stage compression compressors, although the gas pressure can meet the standard, the temperature of the gas will also rise while pressurizing. The higher the gas pressure, the higher the temperature. This will cause the temperature of the compression cylinder to be too high. When the piston reciprocates in the compression cylinder, the gas is mainly sealed by the seal on the outer surface of the piston. When the temperature is too high, it will seriously affect the service life of the seal. Failure of the seal will cause leakage, pressurization failure, etc., requiring frequent shutdowns for maintenance and replacement, affecting the normal operation of the compressor. Currently, there is no good solution to the above problems.

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

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a single-acting double-head liquid-driven compressor system, which solves the problem of low compression efficiency of previous single-stage compressors and 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 the present invention to solve the above technical problems is:

[0006] A single-acting double-head liquid-driven compressor system includes a hydraulic drive cylinder, wherein a first compression cylinder and a second compression cylinder are respectively provided on both sides of the hydraulic drive cylinder, the air inlets of the first compression cylinder and the second compression cylinder are respectively connected to a low-pressure gas pipeline, and the air outlets of the first compression cylinder and the second compression cylinder are respectively connected to a high-pressure gas pipeline, an exhaust cooler is provided on the high-pressure gas pipeline, the water inlet of the exhaust cooler is connected to a cooling water inlet pipeline, and the water outlet of the exhaust cooler is connected to a cooling water outlet pipeline, water cooling channels are respectively provided in the cylinder walls of the first compression cylinder and the second compression cylinder, the water inlet of the second compression cylinder is connected to the cooling water inlet pipeline, the water outlet of the second compression cylinder is connected to the water inlet of the first compression cylinder through a cooling water delivery pipeline, and the water outlet of the first compression cylinder is connected to the cooling water outlet pipeline.

[0007] The hydraulic oil of the hydraulic drive cylinder is provided by a variable displacement plunger pump.

[0008] The low-pressure gas pipeline and the high-pressure gas pipeline are respectively provided with a pressure sensor and a temperature sensor.

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

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

[0011] The high-pressure gas pipeline is provided with a safety valve, which is connected to the vent pipeline.

[0012] A hydraulic piston is provided in the hydraulic drive cylinder, a first air cavity piston is provided in the first compression cylinder, and a second air cavity piston is provided in the second compression cylinder. Both sides of the hydraulic piston are connected to the first air cavity piston and the second air cavity piston respectively through piston rods.

[0013] The utility model adopts the above solution and has the following advantages:

[0014] By arranging a first compression cylinder and a second compression cylinder on both sides of the hydraulic drive cylinder, the air inlets of the first compression cylinder and the second compression cylinder are connected to the low-pressure gas pipeline respectively, and the hydraulic piston of the hydraulic drive cylinder can respectively drive the first compression cylinder and the second compression cylinder to work to pressurize the gas when moving left and right, thereby improving the compression efficiency, and the gas entering the first compression cylinder and the second compression cylinder is both low-temperature and low-pressure gas, which can avoid the problem of excessive temperature of the compression cylinder body caused by excessive gas temperature; by arranging an exhaust cooler on the high-pressure gas pipeline, the exhaust cooler can cool the pressurized gas of the first compression cylinder and the second compression cylinder to meet Sufficient gas operating temperature; in addition, the cooling water of the cooling water inlet pipeline can first enter the water-cooling channel in the cylinder wall of the second compression cylinder to cool the second compression cylinder, and then enter the water-cooling channel in the cylinder wall of the first compression cylinder through the cooling water delivery pipeline to cool the first compression cylinder, thereby realizing cooling of the outside of the first compression cylinder and the second compression cylinder; the first compression cylinder and the second compression cylinder are both filled with low-temperature gas, and the outside can be water-cooled, thereby protecting the seals on the first air cavity piston and the second air cavity piston, extending the service life, reducing the number of shutdowns for maintenance and replacement, and ensuring the normal operation of the compressor. Description of the drawings:

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

[0016] In the figure, 1. hydraulic drive cylinder, 2. first compression cylinder, 3. second compression cylinder, 4. low-pressure gas pipeline, 5. high-pressure gas pipeline, 6. exhaust cooler, 7. cooling water inlet pipeline, 8. cooling water outlet pipeline, 9. cooling water delivery pipeline, 10. pressure sensor, 11. temperature sensor, 12. manual ball valve, 13. pneumatic ball valve, 14. filter, 15. check valve, 16. safety valve, 17. vent pipeline, 18. hydraulic piston, 19. first air cavity piston, 20. second air cavity piston, 21. piston rod. Specific implementation method:

[0017] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, a single-acting double-head liquid-driven compressor system includes a hydraulic drive cylinder 1, and a first compression cylinder 2 and a second compression cylinder 3 are respectively provided on both sides of the hydraulic drive cylinder 1. The air inlets of the first compression cylinder 2 and the second compression cylinder 3 are respectively connected to the low-pressure gas pipeline 4, and the air outlets of the first compression cylinder 2 and the second compression cylinder 3 are respectively connected to the high-pressure gas pipeline 5. An exhaust cooler 6 is provided on the high-pressure gas pipeline 5, and the water inlet of the exhaust cooler 6 is connected to the cooling water inlet pipeline 7, and the water outlet of the exhaust cooler 6 is connected to the cooling water outlet pipeline 8. Water cooling channels are respectively provided in the cylinder walls of the first compression cylinder 2 and the second compression cylinder 3, and the water inlet of the second compression cylinder 3 is connected to the cooling water inlet pipeline 7. The water outlet of the second compression cylinder 3 is connected to the water inlet of the first compression cylinder 2 through the cooling water delivery pipeline 9, and the water outlet of the first compression cylinder 2 is connected to the cooling water outlet pipeline 8.

[0019] The hydraulic oil of the hydraulic drive cylinder 1 is provided by a variable displacement plunger pump to drive the hydraulic piston 18 to reciprocate left and right.

[0020] The low-pressure gas pipeline 4 and the high-pressure gas pipeline 5 are respectively provided with a pressure sensor 10 and a temperature sensor 11 to facilitate real-time detection of gas pressure and temperature.

[0021] The low-pressure gas pipeline 4 is provided with a manual ball valve 12, a pneumatic ball valve 13 and a filter 14. The filter 14 can filter the low-pressure gas.

[0022] The high-pressure gas pipeline 5 is provided with a manual ball valve 12, a pneumatic ball valve 13 and a check valve 15. The check valve 15 can prevent the high-pressure gas from returning.

[0023] The high-pressure gas pipeline 5 is provided with a safety valve 16 , which is connected to a venting pipeline 17 . The safety valve 16 can prevent the system pressure from overloading.

[0024] A hydraulic piston 18 is provided in the hydraulic drive cylinder 1, a first air chamber piston 19 is provided in the first compression cylinder 2, and a second air chamber piston 20 is provided in the second compression cylinder 3. The two sides of the hydraulic piston 18 are connected to the first air chamber piston 19 and the second air chamber piston 20 respectively through piston rods 21.

[0025] Working principle:

[0026] During operation, hydraulic oil is supplied to hydraulic drive cylinder 1 via a variable displacement piston pump, driving hydraulic piston 18 in a reciprocating motion. When hydraulic oil chamber B is filled with high-pressure hydraulic oil, hydraulic piston 18 in hydraulic drive cylinder 1 moves from right to left, driving piston rod 21 to move leftward as well. The first air chamber piston 19 in first compression cylinder 2 compresses gas to the left and discharges high-pressure gas, while low-pressure gas simultaneously enters second compression cylinder 3. When hydraulic piston 18 in hydraulic drive cylinder 1 moves to a certain leftward position, a sensor receives a signal, which in turn signals the external hydraulic system to reverse direction. High-pressure hydraulic oil begins to fill hydraulic oil chamber A, and hydraulic piston 18 begins to move from left to right. The second air chamber piston 20 in second compression cylinder 3 compresses gas to the right and discharges high-pressure gas, while low-pressure gas simultaneously enters first compression cylinder 2. This reciprocating motion continues, discharging compressed gas, which then passes through exhaust cooler 6 and enters the customer's designated container.

[0027] The above specific implementation methods cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or transformation made to the implementation methods of the present utility model falls within the protection scope of the present utility model.

[0028] Anything not described in detail in the present invention is well known to those skilled in the art.

Claims

1. A single-acting double-head liquid-driven compressor system, characterized by: It includes a hydraulic drive cylinder, and a first compression cylinder and a second compression cylinder are respectively provided on both sides of the hydraulic drive cylinder, the air inlets of the first compression cylinder and the second compression cylinder are respectively connected to the low-pressure gas pipeline, and the air outlets of the first compression cylinder and the second compression cylinder are respectively connected to the high-pressure gas pipeline, an exhaust cooler is provided on the high-pressure gas pipeline, the water inlet of the exhaust cooler is connected to the cooling water inlet pipeline, and the water outlet of the exhaust cooler is connected to the cooling water outlet pipeline, water cooling channels are respectively provided in the cylinder walls of the first compression cylinder and the second compression cylinder, the water inlet of the second compression cylinder is connected to the cooling water inlet pipeline, the water outlet of the second compression cylinder is connected to the water inlet of the first compression cylinder through the cooling water delivery pipeline, and the water outlet of the first compression cylinder is connected to the cooling water outlet pipeline.

2. A single-acting double-head liquid-driven compressor system according to claim 1, characterized in that: The hydraulic oil of the hydraulic drive cylinder is provided by a variable displacement plunger pump.

3. The single-acting double-head liquid-driven compressor system according to claim 1, characterized in that: The low-pressure gas pipeline and the high-pressure gas pipeline are respectively provided with a pressure sensor and a temperature sensor.

4. The single-acting double-head liquid-driven compressor system according to claim 1, characterized in that: The low-pressure gas pipeline is provided with a manual ball valve, a pneumatic ball valve and a filter.

5. The single-acting double-head liquid-driven compressor system according to claim 1, characterized in that: The high-pressure gas pipeline is provided with a manual ball valve, a pneumatic ball valve and a check valve.

6. The single-acting double-head liquid-driven compressor system according to claim 1, characterized in that: The high-pressure gas pipeline is provided with a safety valve, which is connected to the vent pipeline.

7. The single-acting double-head liquid-driven compressor system according to claim 1, characterized in that: A hydraulic piston is provided in the hydraulic drive cylinder, a first air cavity piston is provided in the first compression cylinder, and a second air cavity piston is provided in the second compression cylinder. Both sides of the hydraulic piston are connected to the first air cavity piston and the second air cavity piston respectively through piston rods.

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