Liquid piston compressor and control method

Abstract

The liquid piston compressor comprises a compression assembly, the compression assembly comprises a first compression tank, a second compression tank, a third compression tank and a plunger pump, a liquid inlet of the plunger pump communicates with a compressed liquid pool, a first electromagnetic valve is arranged between the plunger pump and the first compression tank, and a second electromagnetic valve is arranged between the plunger pump and the second compression tank; a first one-way valve is arranged between the first compression tank and the low-pressure air source, a second one-way valve is arranged between the second compression tank and the low-pressure air source, a third one-way valve is arranged between the third compression tank and the low-pressure air source, and a fourth one-way valve is arranged between the first compression tank and the high-pressure tank. A fifth one-way valve is arranged between the second compression tank and the high-pressure tank, a sixth one-way valve is arranged between the third compression tank and the high-pressure tank, and the high-pressure tank is communicated with a heat exchange mechanism. Liquid is always located below, gas is located above, the compression tank is easily filled with the liquid, and the efficiency is higher than that of a traditional compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid compressors, and particularly to a liquid piston compressor and a control method therefor. Background Art

[0002] During the compression process of mechanical compressors, there are often significant energy losses. Due to the friction between the piston and the cylinder block, gas leakage, and heat dissipation during the compression process, the energy efficiency ratio of the compressor is not high, increasing energy consumption. Moreover, it generates relatively high noise and obvious vibration during operation, which not only poses a potential threat to the health of operators but may also interfere with or damage precision instruments around the equipment. In addition, long-term vibration and noise may accelerate the wear and aging of the equipment, shortening its service life.

[0003] Therefore, a liquid piston compressor and a control method are proposed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a liquid piston compressor and a control method therefor to solve the problems existing in the above prior art.

[0005] To achieve the above purpose, the present invention provides the following solution: The present invention provides a liquid piston compressor, including:

[0006] A compression assembly, the compression assembly includes a first compression tank, a second compression tank, a third compression tank, and a plunger pump. The liquid inlet of the plunger pump is communicated with a compressed liquid pool. The first compression tank, the second compression tank, and the third compression tank are all communicated with the liquid outlet of the plunger pump. A first solenoid valve is arranged between the plunger pump and the first compression tank, a second solenoid valve is arranged between the plunger pump and the second compression tank, a third solenoid valve is arranged between the plunger pump and the third compression tank, a fourth solenoid valve is arranged between the first compression tank and the compressed liquid pool, a fifth solenoid valve is arranged between the second compression tank and the compressed liquid pool, a sixth solenoid valve is arranged between the third compression tank and the compressed liquid pool. The first compression tank, the second compression tank, and the third compression tank are all communicated with a low-pressure gas source and a high-pressure tank. A first one-way valve is arranged between the first compression tank and the low-pressure gas source, a second one-way valve is arranged between the second compression tank and the low-pressure gas source, a third one-way valve is arranged between the third compression tank and the low-pressure gas source, a fourth one-way valve is arranged between the first compression tank and the high-pressure tank, a fifth one-way valve is arranged between the second compression tank and the high-pressure tank, a sixth one-way valve is arranged between the third compression tank and the high-pressure tank. The high-pressure tank is communicated with a heat exchange mechanism.

[0007] Preferably, the heat exchange mechanism includes a heat exchanger, a high-pressure liquid tank, a compression heat storage pump, a heat tank 1 and a heat tank 2, an air pipe 1 is connected between the high-pressure tank and the high-pressure liquid tank, the heat tank 1 and the heat tank 2 are both filled with heat storage medium, a liquid pipe 1 is connected between the heat tank 1 and the heat tank 2, the compression heat storage pump is installed on the liquid pipe 1, and the air pipe 1 and the liquid pipe 1 both pass through the heat exchanger.

[0008] Preferably, the liquid outlet of the plunger pump is connected to a main pipe 1, a liquid pipe 2 is connected between the compression tank 1 and the main pipe 1, the solenoid valve 1 is installed on the liquid pipe 2, a liquid pipe 3 is connected between the compression tank 1 and the compressed liquid pool, and the solenoid valve 4 is installed on the liquid pipe 3.

[0009] Preferably, a liquid pipe four is connected between the main pipe one and the compression tank two, and the solenoid valve two is installed on the liquid pipe four. A liquid pipe five is connected between the compression tank two and the compressed liquid pool, and the solenoid valve five is installed on the liquid pipe five.

[0010] Preferably, a liquid pipe six is ​​connected between the main pipe one and the compression tank three, and the solenoid valve three is installed on the liquid pipe six. A liquid pipe seven is connected between the compression tank three and the compressed liquid pool, and the solenoid valve six is ​​installed on the liquid pipe seven.

[0011] Preferably, an air pipe 2 is connected between the compression tank 1 and the low-pressure air source, and the one-way valve 1 is installed on the air pipe 2; an air pipe 3 is connected between the compression tank 2 and the low-pressure air source, and the one-way valve 2 is installed on the air pipe 3; an air pipe 4 is connected between the compression tank 3 and the low-pressure air source, and the one-way valve 3 is installed on the air pipe 4.

[0012] Preferably, the high-pressure tank is connected to a main pipe 2, an air pipe 5 is connected between the compression tank 1 and the main pipe 2, and the one-way valve 4 is installed on the air pipe 5, an air pipe 6 is connected between the compression tank 2 and the main pipe 2, and the one-way valve 5 is installed on the air pipe 6, an air pipe 7 is connected between the compression tank 3 and the main pipe 2, and the one-way valve 6 is installed on the air pipe 7.

[0013] Preferably, the compression tanks 1, 2 and 3 have the same structure, a baffle and a floating plate are arranged in the compression tank 1, the outer diameter of the baffle is smaller than the inner diameter of the compression tank 1, a rubber ring is fixedly connected to the top end of the compression tank 1, the rubber ring is tilted, and the rubber ring abuts against the baffle, a motor is fixedly connected to the compression tank 1, the motor and the baffle are transmission-connected via a screw nut pair, a plurality of guide pillars are fixedly connected in the compression tank 1, a plurality of through holes are provided on the baffle and the floating plate, and the guide pillars are penetrated through the through holes.

[0014] Preferably, the ball screw nut pair includes a ball screw and a nut. The ball screw is rotatably connected to the first compression tank, the output shaft of the motor is fixedly connected to the ball screw, the nut is fixedly connected to the baffle plate, a retaining ring is fixedly connected inside the first compression tank, the outer diameter of the floating plate is larger than the inner diameter of the retaining ring, and the ball screw passes through the through hole on the floating plate.

[0015] A liquid compressor control method includes the following steps:

[0016] Step 1: Before starting, open solenoid valve 1, close solenoid valves 2, 3, and 4, start the plunger pump, and the plunger pump pumps the liquid in the compressed liquid tank into the first compression tank. The gas in the first compression tank is compressed, and the compressed gas enters the high-pressure tank through check valve 4 for storage;

[0017] Step 2: Open solenoid valves 2 and 4, close solenoid valves 1, 3, and 5. The liquid in the first compression tank flows into the compressed liquid tank under the action of gravity. At the same time, the gas from the low-pressure air source enters the first compression tank through check valve 1, and the plunger pump pumps the liquid into the second compression tank. The gas in the second compression tank is compressed, and the compressed gas enters the high-pressure tank through check valve 5 for storage;

[0018] Step 3: Open solenoid valves 3 and 5, close solenoid valves 1, 2, and 6. The liquid in the second compression tank flows into the compressed liquid tank. At the same time, the gas from the low-pressure air source enters the second compression tank through check valve 2, and the plunger pump pumps the liquid into the third compression tank. The gas in the third compression tank is compressed, and the compressed gas enters the high-pressure tank through check valve 6 for storage;

[0019] Step 4: Open solenoid valves 1 and 6, close solenoid valves 2, 3, and 4. The liquid in the third compression tank flows into the compressed liquid tank. At the same time, the gas from the low-pressure air source enters the third compression tank through check valve 3, and the plunger pump pumps the liquid into the first compression tank. The gas in the first compression tank is compressed, and the compressed gas enters the high-pressure tank through check valve 4 for storage;

[0020] Step 5: Repeat Step 2, Step 3, and Step 4.

[0021] The present invention discloses the following technical effects: Since the present invention uses liquid as the medium, the liquid is not easily compressed. Because the specific gravity of the liquid is greater than that of the gas, in the first compression tank, the second compression tank, or the third compression tank, the liquid is always at the bottom and the gas is at the top. The liquid is easier to fill in the compression tank, and the sealing requirements between the mechanical piston and the cylinder wall are higher. The efficiency of the present invention is higher than that of the traditional mechanical compressor. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Structural schematic diagram of the liquid piston compressor of the present invention;

[0024] Figure 2 Structural schematic diagram of Embodiment 2 of the present invention;

[0025] Figure 3 Cross-sectional structural schematic diagram of Compression Tank 1 in Embodiment 2 of the present invention;

[0026] Among them, 1. Compression Tank 1; 2. Compression Tank 2; 3. Compression Tank 3; 4. Plunger pump; 5. Compressed liquid pool; 6. Solenoid valve 1; 7. Solenoid valve 2; 8. Solenoid valve 3; 9. Solenoid valve 4; 10. Solenoid valve 5; 11. Solenoid valve 6; 12. Low-pressure gas source; 13. High-pressure tank; 14. Check valve 1; 15. Check valve 2; 16. Check valve 3; 17. Check valve 4; 18. Check valve 5; 19. Check valve 6; 20. Heat exchanger; 21. High-pressure liquid tank; 22. Compression storage heat pump; 23. Heat tank 1; 24. Heat tank 2; 25. Air pipe 1; 26. Liquid pipe 1; 27. Liquid pipe 2; 28. Liquid pipe 3; 29. Liquid pipe 4; 30. Liquid pipe 6; 31. Liquid pipe 7; 32. Air pipe 2; 33. Air pipe 3; 34. Air pipe 4; 35. Air pipe 5; 36. Air pipe 6; 37. Air pipe 7; 38. Baffle; 39. Floating plate; 40. Rubber ring; 41. Motor; 42. Guide post; 43. Lead screw; 44. Nut; 45. Retaining ring; 46. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0029] Embodiment 1

[0030] Refer to Figure 1 , the present invention provides a liquid piston compressor, including:

[0031] Compression assembly, the compression assembly includes a first compression tank 1, a second compression tank 2, a third compression tank 3 and a plunger pump 4. The liquid inlet of the plunger pump 4 is connected to a compressed liquid pool 5. The liquid outlet of the plunger pump 4 is respectively connected to the first compression tank 1, the second compression tank 2 and the third compression tank 3. An electromagnetic valve one 6 is arranged between the plunger pump 4 and the first compression tank 1. An electromagnetic valve two 7 is arranged between the plunger pump 4 and the second compression tank 2. An electromagnetic valve three 8 is arranged between the plunger pump 4 and the third compression tank 3. An electromagnetic valve four 9 is arranged between the first compression tank 1 and the compressed liquid pool 5. An electromagnetic valve five 10 is arranged between the second compression tank 2 and the compressed liquid pool 5. An electromagnetic valve six 11 is arranged between the third compression tank 3 and the compressed liquid pool 5. The first compression tank 1, the second compression tank 2 and the third compression tank 3 are all connected to a low-pressure air source 12 and a high-pressure tank 13. A check valve one 14 is arranged between the first compression tank 1 and the low-pressure air source 12. A check valve two 15 is arranged between the second compression tank 2 and the low-pressure air source 12. A check valve three 16 is arranged between the third compression tank 3 and the low-pressure air source 12. A check valve four 17 is arranged between the first compression tank 1 and the high-pressure tank 13. A check valve five 18 is arranged between the second compression tank 2 and the high-pressure tank 13. A check valve six 19 is arranged between the third compression tank 3 and the high-pressure tank 13. The high-pressure tank 13 is connected to a heat exchange mechanism.

[0032] In this device, the compressed liquid pool 5 is filled with liquid. The plunger pump 4 is used to pump the liquid in the compressed liquid pool 5 into the first compression tank 1, the second compression tank 2 or the third compression tank 3. The high-pressure tank 13 is used to store high-pressure gas.

[0033] Further optimized solution, the heat exchange mechanism includes a heat exchanger 20, a high-pressure liquid tank 21, a compressed heat storage pump 22, a first heat tank 23 and a second heat tank 24. A first air pipe 25 is connected between the high-pressure tank 13 and the high-pressure liquid tank 21. Both the first heat tank 23 and the second heat tank 24 are filled with heat storage medium. A first liquid pipe 26 is connected between the first heat tank 23 and the second heat tank 24. The compressed heat storage pump 22 is installed on the first liquid pipe 26. Both the first air pipe 25 and the first liquid pipe 26 pass through the heat exchanger 20.

[0034] The heat storage medium is liquid. The high-pressure gas sent into the high-pressure tank 13 has a relatively high temperature. Through the heat exchange of the heat exchanger 20, the heat is transferred to the heat storage medium in the first heat tank 23 and the second heat tank 24. The compressed heat storage pump 22 pumps the heat storage medium between the first heat tank 23 and the second heat tank 24. The cooled high-pressure gas is stored in the high-pressure liquid tank 21.

[0035] Further optimized solution, a first main pipe is connected to the liquid outlet of the plunger pump 4. A second liquid pipe 27 is connected between the first compression tank 1 and the first main pipe. The electromagnetic valve one 6 is installed on the second liquid pipe 27. A third liquid pipe 28 is connected between the first compression tank 1 and the compressed liquid pool 5. The electromagnetic valve four 9 is installed on the third liquid pipe 28.

[0036] For a further optimized solution, a liquid pipe four 29 is connected between the main pipe one and the compression tank two 2, and the solenoid valve two 7 is installed on the liquid pipe four 29. A liquid pipe five 46 is connected between the compression tank two 2 and the compressed liquid pool 5, and the solenoid valve five 10 is installed on the liquid pipe five 46.

[0037] For a further optimized solution, a liquid pipe six 30 is connected between the main pipe one and the compression tank three 3, and the solenoid valve three 8 is installed on the liquid pipe six 30. A liquid pipe seven 31 is connected between the compression tank three 3 and the compressed liquid pool 5, and the solenoid valve six 11 is installed on the liquid pipe seven 31.

[0038] For a further optimized solution, an air pipe two 32 is connected between the compression tank one 1 and the low-pressure air source 12, and the one-way valve one 14 is installed on the air pipe two 32. An air pipe three 33 is connected between the compression tank two 2 and the low-pressure air source 12, and the one-way valve two 15 is installed on the air pipe three 33. An air pipe four 34 is connected between the compression tank three 3 and the low-pressure air source 12, and the one-way valve three 16 is installed on the air pipe four 34.

[0039] The low-pressure gas of the low-pressure air source 12 enters the compression tank one 1 through the air pipe two 32 and the one-way valve one 14, enters the compression tank two 2 through the air pipe three 33 and the one-way valve two 15, and enters the compression tank three 3 through the air pipe four 34 and the one-way valve three 16.

[0040] For a further optimized solution, a main pipe two is connected to the high-pressure tank 13. An air pipe five 35 is connected between the compression tank one 1 and the main pipe two, and the one-way valve four 17 is installed on the air pipe five 35. An air pipe six 36 is connected between the compression tank two 2 and the main pipe two, and the one-way valve five 18 is installed on the air pipe six 36. An air pipe seven 37 is connected between the compression tank three 3 and the main pipe two, and the one-way valve six 19 is installed on the air pipe seven 37.

[0041] The compressed gas in the compression tank one 1 enters the high-pressure tank 13 through the air pipe five 35 and the one-way valve four 17, the compressed gas in the compression tank two 2 enters the high-pressure tank 13 through the air pipe six 36 and the one-way valve five 18, and the compressed gas in the compression tank three 3 enters the high-pressure tank 13 through the air pipe seven 37 and the one-way valve six 19.

[0042] A control method for a liquid piston compressor includes the following steps:

[0043] Step one: Before starting, turn on the solenoid valve one 6, turn off the solenoid valve two 7, the solenoid valve three 8, and the solenoid valve four 9, and start the plunger pump 4. The plunger pump 4 pumps the liquid in the compressed liquid pool 5 into the compression tank one 1, and the gas in the compression tank one 1 is compressed. The compressed gas enters the high-pressure tank 13 through the one-way valve four 17 for storage;

[0044] Step 2: Open solenoid valve 2-7 and solenoid valve 4-9, close solenoid valve 1-6, solenoid valve 3-8 and solenoid valve 5-10. The liquid in compression tank 1 can flow into the compressed liquid pool 5 by its own weight. At the same time, the gas from the low-pressure gas source 12 enters compression tank 1 through check valve 1-14. The plunger pump 4 pumps the liquid into compression tank 2. The gas in compression tank 2 is compressed, and the compressed gas enters the high-pressure tank 13 through check valve 5-18 for storage;

[0045] Step 3: Open solenoid valve 3-8 and solenoid valve 5-10, close solenoid valve 1-6, solenoid valve 2-7 and solenoid valve 6-11. The liquid in compression tank 2 can flow into the compressed liquid pool 5 by its own weight. At the same time, the gas from the low-pressure gas source 12 enters compression tank 2 through check valve 2-15. The plunger pump 4 pumps the liquid into compression tank 3. The gas in compression tank 3 is compressed, and the compressed gas enters the high-pressure tank 13 through check valve 6-19 for storage;

[0046] Step 4: Open solenoid valve 1-6 and solenoid valve 6-11, close solenoid valve 2-7, solenoid valve 3-8, solenoid valve 4-9. The liquid in compression tank 3 can flow into the compressed liquid pool 5 by its own weight. At the same time, the gas from the low-pressure gas source 12 enters compression tank 3 through check valve 3-16. The plunger pump 4 pumps the liquid into compression tank 1. The gas in compression tank 1 is compressed, and the compressed gas enters the high-pressure tank 13 through check valve 4-17 for storage;

[0047] Step 5: Repeat Step 2, Step 3 and Step 4.

[0048] Embodiment 2

[0049] Refer to Figures 2 - 3 , and further optimize the solution. Compression tanks 1, 2 and 3 have the same structure. A baffle 38 and a floating plate 39 are arranged in compression tank 1. The outer diameter of baffle 38 is smaller than the inner diameter of compression tank 1. A rubber ring 40 is fixedly connected to the top end inside compression tank 1. The rubber ring 40 is inclined and abuts against baffle 38. A motor 41 is fixedly connected to compression tank 1. The motor 41 and the baffle 38 are connected by a lead screw-nut pair for transmission. A number of guide posts 42 are fixedly connected inside compression tank 1. A number of through holes are provided on both the baffle 38 and the floating plate 39, and the guide posts 42 are passed through the through holes.

[0050] The baffle 38 is in contact with the rubber ring 40. When the plunger pump 4 pumps liquid into the first compression tank 1, the gas in the first compression tank 1 is compressed. During the compression process, the gas basically does not pass through the check valve four 17. Even if a small amount of gas passes through the check valve four 17, it will not affect the gas pressure in the first compression tank 1. After the plunger pump 4 stops pumping liquid into the first compression tank 1, the motor 41 drives the lead screw nut pair to move, thereby driving the baffle 38 to move downward, separating the baffle 38 from the rubber ring 40 so that the high-pressure gas can enter the high-pressure tank 13 through the check valve four 17. The guide post 42 can prevent the baffle 38 from rotating, and the floating plate 39 can prevent the liquid from shaking violently when it enters the first compression tank 1. When the high-pressure gas in the first compression tank 1 gradually decreases, the solenoid valve four 9 can be opened to discharge the liquid in the first compression tank 1. Similarly, the second compression tank 2 and the third compression tank 3 are also operated in the same way.

[0051] For a further optimized solution, the lead screw nut pair includes a lead screw 43 and a nut 44. The lead screw 43 is rotatably connected to the first compression tank 1. The output shaft of the motor 41 is fixedly connected to the lead screw 43. The nut 44 is fixedly connected to the baffle 38. A retaining ring 45 is fixedly connected inside the first compression tank 1. The outer diameter of the floating plate 39 is larger than the inner diameter of the retaining ring 45. The lead screw 43 passes through the through hole on the floating plate 39.

[0052] There is no thread at the connection between the lead screw 43 and the first compression tank 1, and the lead screw 43 and the tank body of the first compression tank 1 are in sealed connection. Similarly, the second compression tank 2 and the third compression tank 3 are also the same. The retaining ring 45 prevents the floating plate 39 from fitting with the bottom surface of the first compression tank 1, avoiding the floating plate 39 getting stuck on the guide post 42 when the liquid enters the first compression tank 1. There is no connection between the lead screw 43 and the floating plate 39.

[0053] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0054] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A liquid piston compressor, characterized in that: include: A compression assembly, the compression assembly comprising a compression tank 1 (1), a compression tank 2 (2), a compression tank 3 (3) and a plunger pump (4), the liquid inlet of the plunger pump (4) being connected to a compression liquid pool (5), the compression tank 1 (1), the compression tank 2 (2) and the compression tank 3 (3) being connected to a liquid outlet of the plunger pump (4), a solenoid valve 1 (6) being arranged between the plunger pump (4) and the compression tank 1 (1), a solenoid valve 2 (7) being arranged between the plunger pump (4) and the compression tank 2 (2), a solenoid valve 3 (8) being arranged between the plunger pump (4) and the compression tank 3 (3), a solenoid valve 4 (9) being arranged between the compression tank 1 (1) and the compression liquid pool (5), a solenoid valve 5 (10) being arranged between the compression tank 2 (2) and the compression liquid pool (5), and a solenoid valve 6 (11) being arranged between the compression tank 3 (3) and the compression tank 1 (1). A solenoid valve six (11) is arranged between the liquid pool (5); the compression tank one (1), the compression tank two (2) and the compression tank three (3) are all connected to a low-pressure gas source (12) and a high-pressure tank (13); a one-way valve one (14) is arranged between the compression tank one (1) and the low-pressure gas source (12); a one-way valve two (15) is arranged between the compression tank two (2) and the low-pressure gas source (12); a one-way valve three (16) is arranged between the compression tank three (3) and the low-pressure gas source (12); a one-way valve four (17) is arranged between the compression tank one (1) and the high-pressure tank (13); a one-way valve five (18) is arranged between the compression tank two (2) and the high-pressure tank (13); a one-way valve six (19) is arranged between the compression tank three (3) and the high-pressure tank (13); and the high-pressure tank (13) is connected to a heat exchange mechanism.

2. A liquid piston compressor according to claim 1, characterized in that: The heat exchange mechanism comprises a heat exchanger (20), a high-pressure liquid tank (21), a compression heat storage pump (22), a heat tank 1 (23) and a heat tank 2 (24); an air pipe 1 (25) is connected between the high-pressure tank (13) and the high-pressure liquid tank (21); the heat tank 1 (23) and the heat tank 2 (24) are both filled with heat storage medium; a liquid pipe 1 (26) is connected between the heat tank 1 (23) and the heat tank 2 (24); the compression heat storage pump (22) is installed on the liquid pipe 1 (26); and the air pipe 1 (25) and the liquid pipe 1 (26) both pass through the heat exchanger (20).

3. A liquid piston compressor according to claim 1, characterized in that: The liquid outlet of the plunger pump (4) is connected to a main pipe 1, a liquid pipe 2 (27) is connected between the compression tank 1 (1) and the main pipe 1, the solenoid valve 1 (6) is installed on the liquid pipe 2 (27), a liquid pipe 3 (28) is connected between the compression tank 1 (1) and the compressed liquid pool (5), and the solenoid valve 4 (9) is installed on the liquid pipe 3 (28).

4. A liquid piston compressor according to claim 3, characterized in that: A liquid pipe 4 (29) is connected between the main pipe 1 and the compression tank 2 (2), and the solenoid valve 2 (7) is installed on the liquid pipe 4 (29). A liquid pipe 5 (46) is connected between the compression tank 2 (2) and the compressed liquid pool (5), and the solenoid valve 5 (10) is installed on the liquid pipe 5 (46).

5. A liquid piston compressor according to claim 3, characterized in that: A liquid pipe six (30) is connected between the main pipe one and the compression tank three (3), and the solenoid valve three (8) is installed on the liquid pipe six (30). A liquid pipe seven (31) is connected between the compression tank three (3) and the compressed liquid pool (5), and the solenoid valve six (11) is installed on the liquid pipe seven (31).

6. A liquid piston compressor according to claim 1, characterized in that: A second air pipe (32) is connected between the compression tank one (1) and the low-pressure air source (12), and the first one-way valve (14) is installed on the second air pipe (32). A third air pipe (33) is connected between the compression tank two (2) and the low-pressure air source (12), and the second one-way valve (15) is installed on the third air pipe (33). A fourth air pipe (34) is connected between the compression tank three (3) and the low-pressure air source (12), and the third one-way valve (16) is installed on the fourth air pipe (34).

7. The liquid piston compressor according to claim 1, characterized in that: The high-pressure tank (13) is connected to a main pipe 2, an air pipe 5 (35) is connected between the compression tank 1 (1) and the main pipe 2, and the one-way valve 4 (17) is installed on the air pipe 5 (35). The compression tank 2 (2) is connected to an air pipe 6 (36), and the one-way valve 5 (18) is installed on the air pipe 6 (36). The compression tank 3 (3) is connected to the main pipe 2, and the one-way valve 6 (19) is installed on the air pipe 7 (37).

8. The liquid piston compressor according to claim 1, characterized in that: The compression tank one (1), the compression tank two (2) and the compression tank three (3) have the same structure. A baffle (38) and a floating plate (39) are arranged in the compression tank one (1). The outer diameter of the baffle (38) is smaller than the inner diameter of the compression tank one (1). A rubber ring (40) is fixedly connected to the top of the compression tank one (1). The rubber ring (40) is tilted and abuts against the baffle (38). A motor (41) is fixedly connected to the compression tank one (1). The motor (41) and the baffle (38) are connected by a screw nut pair. A plurality of guide pillars (42) are fixedly connected to the compression tank one (1). A plurality of through holes are opened on the baffle (38) and the floating plate (39). The guide pillars (42) are inserted into the through holes.

9. A liquid piston compressor according to claim 8, characterized in that: The screw-nut pair comprises a screw (43) and a nut (44); the screw (43) is rotatably connected to the compression tank (1); the output shaft of the motor (41) is fixedly connected to the screw (43); the nut (44) is fixedly connected to the baffle (38); a baffle ring (45) is fixedly connected inside the compression tank (1); the outer diameter of the floating plate (39) is larger than the inner diameter of the baffle ring (45); and the screw (43) passes through a through hole on the floating plate (39).

10. A liquid piston compressor control method, based on the liquid piston compressor according to claim 1, characterized in that: The steps include: Step 1: before starting, open the solenoid valve 1 (6), close the solenoid valve 2 (7), the solenoid valve 3 (8) and the solenoid valve 4 (9), start the plunger pump (4), the plunger pump (4) pumps the liquid in the compressed liquid pool (5) into the compression tank 1 (1), the gas in the compression tank 1 (1) is compressed, and the compressed gas enters the high-pressure tank (13) through the one-way valve 4 (17) for storage; Step 2: Open the electromagnetic valve 2 (7) and the electromagnetic valve 4 (9), and close the electromagnetic valve 1 (6), the electromagnetic valve 3 (8) and the electromagnetic valve 5 (10). The liquid in the compression tank 1 (1) flows into the compression liquid pool (5). At the same time, the gas from the low-pressure gas source (12) enters the compression tank 1 (1) through the one-way valve 1 (14). The plunger pump (4) pumps the liquid into the compression tank 2 (2). The gas in the compression tank 2 (2) is compressed. The compressed gas enters the high-pressure tank (13) through the one-way valve 5 (18) for storage. Step 3: Open the electromagnetic valve 3 (8) and the electromagnetic valve 5 (10), close the electromagnetic valve 1 (6), the electromagnetic valve 2 (7) and the electromagnetic valve 6 (11), the liquid in the compression tank 2 (2) flows into the compression liquid pool (5), and at the same time, the gas from the low-pressure gas source (12) enters the compression tank 2 (2) through the one-way valve 2 (15), the plunger pump (4) pumps the liquid into the compression tank 3 (3), the gas in the compression tank 3 (3) is compressed, and the compressed gas enters the high-pressure tank (13) through the one-way valve 6 (19) for storage; Step 4: Open the electromagnetic valve 1 (6) and the electromagnetic valve 6 (11), close the electromagnetic valve 2 (7), the electromagnetic valve 3 (8), and the electromagnetic valve 4 (9), and the liquid in the compression tank 3 (3) flows into the compression liquid pool (5). At the same time, the gas from the low-pressure gas source (12) enters the compression tank 3 (3) through the one-way valve 3 (16). The plunger pump (4) pumps the liquid into the compression tank 1 (1), and the gas in the compression tank 1 (1) is compressed. The compressed gas enters the high-pressure tank (13) through the one-way valve 4 (17) for storage. Step 5: Repeat steps 2, 3 and 4.

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