Multi-stage liquid cooling piston type compressor

Abstract

The utility model belongs to the technical field of compressors, and discloses a multi-stage liquid cooling piston type compressor which comprises a first-stage compression air cylinder, a second-stage compression air cylinder, a third-stage compression air cylinder, a fourth-stage compression air cylinder, a first cylinder body, a second cylinder body and a gas-liquid separation assembly. The third-stage compression cylinder and the fourth-stage compression cylinder are arranged in the second cylinder body in parallel, the gas-liquid separation assembly is arranged on one side of the second cylinder body, a first-stage exhaust pipe of the first-stage compression cylinder is connected with the second-stage compression cylinder, a second-stage exhaust pipe of the second-stage compression cylinder is connected with the third-stage compression cylinder, and a third-stage exhaust pipe of the third-stage compression cylinder is connected with the fourth-stage compression cylinder; a fourth-stage exhaust pipe of the fourth-stage compression cylinder is connected with the gas-liquid separation assembly. The air compressor has the advantages of being capable of obtaining large air displacement, small in vibration, low in noise, small in size and the like, stability of equipment can be improved, compression heat is reduced, safety is high, the cooling effect is good, and more space is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and particularly relates to a multi-stage liquid-cooled piston compressor. Background Art

[0002] As a general-purpose machine, the piston compressor is widely used in many industries such as petroleum, chemical industry, electric power, construction engineering, mining, iron and steel, metallurgy, automobile, chemical fiber, pharmaceutical, and food. It drives the crankshaft to rotate through the rotation of the motor, and the crankshaft drives the piston to reciprocate in the cylinder block through the connecting rod, causing the volume in the cylinder block to change periodically.

[0003] However, during the compression of the gas, the volume rapidly shrinks, resulting in a sharp rise in the temperature of the compressed air. In large-displacement compressors, the cooling effect is poor when using the air-cooling method. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a multi-stage liquid-cooled piston compressor to solve the above technical problems.

[0005] To achieve the above purpose, the specific technical solution of a multi-stage liquid-cooled piston compressor of the utility model is as follows:

[0006] A multi-stage liquid-cooled piston compressor includes a first-stage compression cylinder, a second-stage compression cylinder, a third-stage compression cylinder, a fourth-stage compression cylinder, a first cylinder block, a second cylinder block, and a gas-liquid separation assembly. The first-stage compression cylinder and the second-stage compression cylinder are arranged in parallel in the first cylinder block. The third-stage compression cylinder and the fourth-stage compression cylinder are arranged in parallel in the second cylinder block. The gas-liquid separation assembly is arranged on one side of the second cylinder block. The first-stage exhaust pipe of the first-stage compression cylinder is connected to the second-stage compression cylinder. The second-stage exhaust pipe of the second-stage compression cylinder is connected to the third-stage compression cylinder. The third-stage exhaust pipe of the third-stage compression cylinder is connected to the fourth-stage compression cylinder. The fourth-stage exhaust pipe of the fourth-stage compression cylinder is connected to the gas-liquid separation assembly. The first-stage exhaust pipe and the second-stage exhaust pipe are both arranged in the first cylinder block. The third-stage exhaust pipe is arranged in the second cylinder block. The first cylinder block and the second cylinder block are filled with coolant for cooling the gas in the gas pipe and the cylinder liner.

[0007] Furthermore, it further includes a driving component, and the first cylinder block and the cooling water for the third and fourth stages are respectively fixedly arranged on both sides of the driving component.

[0008] Furthermore, the driving component includes a crankcase, a crankshaft, a pulley, a connecting rod one, a connecting rod two, a connecting rod three, and a connecting rod four. The crankshaft is arranged in the crankcase. The pulley is arranged on one side of the crankcase and is fixedly connected to the crankshaft. The connecting rod one, the connecting rod two, the connecting rod three, and the connecting rod four are connected to the crankshaft and are respectively fixedly connected to the piston rods of the first-stage compression cylinder, the second-stage compression cylinder, the third-stage compression cylinder, and the fourth-stage compression cylinder.

[0009] Furthermore, one side of the crankcase has an oil input end, an oil pump, a cooling water pump and an oil-gas separator. The oil input end is used to add oil, the oil pump is used to filter the oil, and the cooling water pump is used to cooperate with the cooling pump to realize the cooling circulation of the coolant.

[0010] Furthermore, a dashboard is installed above the crankcase, and the dashboard has an oil pressure gauge, a first-level pressure gauge, a second-level pressure gauge, a third-level pressure gauge, a fourth-level pressure gauge, a third-level temperature gauge, and a terminal temperature gauge. The oil pressure gauge is used to display the oil pressure, the first-level pressure gauge is used to display the air pressure of the first-level compression cylinder, the second-level pressure gauge is used to display the air pressure of the second-level compression cylinder, the third-level pressure gauge is used to display the air pressure of the third-level compression cylinder, and the fourth-level pressure gauge is used to display the air pressure of the fourth-level compression cylinder.

[0011] Furthermore, it also includes an air filter silencer device, which is arranged on the same side of the first cylinder body and is connected to the first-stage compression cylinder through an intake pipe.

[0012] Furthermore, the air filter silencer device includes a silencer shell and an air filter element. One side of the silencer shell is detachably connected to the air filter element, and the other side is connected to the intake pipe of the first-stage compression cylinder through a pipeline. A hollow tube covered with small holes is coaxially provided inside the silencer shell. Both ends of the hollow tube are welded and fixed to the silencer shell, and the space between the hollow tube and the silencer shell is filled with silencer material.

[0013] Furthermore, the first cylinder body comprises a first and second cooling cylinder body, a first and second cooling front cover and a first and second cooling rear cover, the first and second cooling cylinder body is arranged on one side of the crankcase, the first and second cooling front cover and the first and second cooling rear cover are arranged on both sides of the first and second cooling cylinder body, and the first and second compression cylinders are arranged in parallel in the first and second cooling cylinder bodies; the flow passages of the first and second exhaust pipes (12) and the second exhaust pipes (21) are arranged in the first and second cooling front covers (52), the first and second cooling cylinder body (51) and the first and second cooling rear covers (53), respectively; when the first and second cooling front covers (52), the first and second cooling cylinder body (51) and the first and second cooling rear covers (53) are assembled, the first and second exhaust pipes (12) and the second exhaust pipes (21) are respectively connected as a whole.

[0014] Furthermore, the second cylinder body comprises a three-stage and four-stage cooling cylinder body, a three-stage and four-stage cooling front cover and a three-stage and four-stage cooling rear cover, the three-stage and four-stage cooling cylinder body being arranged on one side of the crankcase, the three-stage and four-stage cooling front cover and the three-stage and four-stage cooling rear cover being arranged on both sides of the three-stage and four-stage cooling cylinder body, and the three-stage compression cylinder and the four-stage compression cylinder being arranged in parallel in the three-stage and four-stage cooling cylinder body; the flow passages of the three-stage exhaust pipe (31) are arranged in the three-stage and four-stage cooling front cover (62), the three-stage and four-stage cooling cylinder body (61) and the three-stage and four-stage cooling rear cover (63), respectively; when the three-stage and four-stage cooling front cover (62), the three-stage and four-stage cooling cylinder body (61) and the three-stage and four-stage cooling rear cover (63) are assembled, the three-stage exhaust pipe (31) is connected as a whole.

[0015] Furthermore, a third-stage cooling guide cover is provided inside the third- and fourth-stage cooling rear cover, a sealing ring is provided between the third-stage cooling guide cover, the third- and fourth-stage cooling rear cover and the third- and fourth-stage cooling cylinder body, and the third-stage cooling guide cover is used to connect the third-stage exhaust pipe.

[0016] Furthermore, a four-stage exhaust pipe air inlet is provided at the end of the four-stage exhaust pipe, the four-stage exhaust pipe surrounds the support shaft and extends to the gas-liquid separation assembly, and the four-stage exhaust pipe adopts a spiral surround structure.

[0017] The utility model has the following advantages: the first-stage compression cylinder and the second-stage compression cylinder are arranged in parallel in the first cylinder body, and the third-stage compression cylinder and the fourth-stage compression cylinder are arranged in parallel in the second cylinder body, which can obtain a larger exhaust volume with less vibration, improve the stability of the equipment, reduce compression heat, and extend the service life of parts. The first cylinder body and the second cylinder body are arranged outside the crankcase, and the first-stage exhaust pipe, the second-stage exhaust pipe, the third-stage exhaust pipe and the gas-liquid separation assembly are respectively arranged in the first cylinder body and the second cylinder body. The temperature of the gas is greatly reduced after the four-stage water cooling. It has strong safety, good cooling effect and saves more space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the multi-stage liquid-cooled piston compressor of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 2 The structure of the multi-stage liquid-cooled piston compressor of the utility model is shown in FIG. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of a first-stage compression cylinder of the utility model;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the two-stage compression cylinder of the utility model;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the primary exhaust pipe and the secondary exhaust pipe of the utility model;

[0023] Figure 6 Schematic cross-sectional structure diagram of the three-stage compression cylinder of the present utility model;

[0024] Figure 7 Schematic cross-sectional structure diagram of the four-stage compression cylinder of the present utility model;

[0025] Figure 8 Schematic cross-sectional structure diagram of the three-stage exhaust pipe of the present utility model;

[0026] Figure 9 Schematic structure diagram of the cooling rear cover for the third and fourth stages of the present utility model;

[0027] Figure 10 is Figure 9 Schematic enlarged structure diagram at position I in

[0028] Figure 11 Schematic structure diagram of the cooling water pump of the present utility model;

[0029] Figure 12 Schematic installation structure diagram of the four-stage exhaust pipe and the gas-liquid separation assembly of the present utility model;

[0030] Figure 13 Schematic cross-sectional view of the four-stage exhaust pipe of the present utility model;

[0031] Explanation of marks in the figure: 1. First-stage compression cylinder; 11. Intake pipe; 12. First-stage exhaust pipe; 13. Cylinder liner; 2. Second-stage compression cylinder; 21. Second-stage exhaust pipe; 3. Third-stage compression cylinder; 31. Third-stage exhaust pipe; 4. Fourth-stage compression cylinder; 41. Fourth-stage exhaust pipe; 5. First cylinder block; 51. First and second-stage cooling cylinder block; 52. First and second-stage cooling front cover; 53. First and second-stage cooling rear cover; 6. Second cylinder block; 61. Third and fourth-stage cooling cylinder block; 62. Third and fourth-stage cooling front cover; 63. Third and fourth-stage cooling rear cover; 631. Third-stage cooling guide cover; 632. Sealing ring; 7. Air filter and silencer device; 71. Silencer housing; 72. Air filter element; 8. Driving component; 81. Crankcase; 811. Engine oil input end; 812. Engine oil pump; 813. Cooling water pump; 814. Oil-gas separator; 815. Water pump inlet pipe; 816. Water pump outlet pipe; 817. Liquid-cooled cooler; 82. Crankshaft; 83. Pulley; 84. Connecting rod one; 85. Connecting rod two; 86. Connecting rod three; 87. Connecting rod four; 9. Gas-liquid separation assembly; 91. Separation seat; 92. Gas-liquid separator; 93. Fourth-stage safety valve; 94. Exhaust valve; 10. Instrument panel; 101. Oil pressure gauge; 102. First-stage pressure gauge; 103. Second-stage pressure gauge; 104. Third-stage pressure gauge; 105. Fourth-stage pressure gauge; 106. Third-stage thermometer; 107. Terminal thermometer. Detailed implementation manner

[0032] In order to better understand the purpose, structure and function of the present utility model, the following further describes in detail a multi-stage liquid-cooled piston compressor of the present utility model with reference to the accompanying drawings.

[0033] Combined with the attached Figures 1 to 13 As shown, a multi-stage liquid-cooled piston compressor disclosed by the present utility model includes a first-stage compression cylinder 1, a second-stage compression cylinder 2, a third-stage compression cylinder 3, a fourth-stage compression cylinder 4, a first cylinder block 5, a second cylinder block 6, an air filter and silencing device 7, a driving component 8 and a gas-liquid separation assembly 9. A plurality of safety valves 110 are arranged on the first cylinder block 5 and the second cylinder block 6. The first cylinder block 5 and the cooling water for the third and fourth stages 6 are respectively fixedly arranged on both sides of the driving component 8. The first-stage compression cylinder 1 and the second-stage compression cylinder 2 are arranged in parallel in the first cylinder block 5. The third-stage compression cylinder 3 and the fourth-stage compression cylinder 4 are arranged in parallel in the second cylinder block 6. The air filter and silencing device 7 is arranged on the same side of the first cylinder block 5. The gas-liquid separation assembly 9 is arranged on one side of the second cylinder block 6. The intake pipe is connected to the air filter and silencing device 7. The air filter and silencing device 7 is connected to the intake pipe 11 of the first-stage compression cylinder 1. The first-stage exhaust pipe 12 of the first-stage compression cylinder 1 is connected to the second-stage compression cylinder 2. The second-stage exhaust pipe 21 of the second-stage compression cylinder 2 is connected to the third-stage compression cylinder 3. The third-stage exhaust pipe 31 of the third-stage compression cylinder 3 is connected to the fourth-stage compression cylinder 4. The fourth-stage exhaust pipe 41 of the fourth-stage compression cylinder 4 is connected to the gas-liquid separation assembly 9.

[0034] In combination with the above, the driving component 8 includes a crankcase 81, a crankshaft 82, a pulley 83, a first connecting rod 84, a second connecting rod 85, a third connecting rod 86, and a fourth connecting rod 87. The crankshaft 82 is arranged in the crankcase 81. The pulley 83 is arranged on one side of the crankcase 81 and is fixedly connected to the crankshaft 82. The first connecting rod 84, the second connecting rod 85, the third connecting rod 86, and the fourth connecting rod 87 are connected to the crankshaft 82 and are respectively fixedly connected to the piston rods of the first-stage compression cylinder 1, the second-stage compression cylinder 2, the third-stage compression cylinder 3, and the fourth-stage compression cylinder 4. The pulley 83 is driven externally. The crankshaft 82 rotates driven by the pulley 83, driving the first connecting rod 84, the second connecting rod 85, the third connecting rod 86, and the fourth connecting rod 87 to perform telescopic movements, thereby driving the first-stage compression cylinder 1, the second-stage compression cylinder 2, the third-stage compression cylinder 3, and the fourth-stage compression cylinder 4 to work.

[0035] Among them, combined with the attached Figures 3 to 5 As shown, the first cylinder block 5 includes a first and second-stage cooling cylinder block 51, a first and second-stage cooling front cover 52, and a first and second-stage cooling rear cover 53. The first and second-stage cooling cylinder block 51 is arranged on one side of the crankcase 81. The first and second-stage cooling front cover 52 and the first and second-stage cooling rear cover 53 are arranged on both sides of the first and second-stage cooling cylinder block 51. The first-stage compression cylinder 1 and the second-stage compression cylinder 2 are arranged in parallel in the first and second-stage cooling cylinder block 51;

[0036] The flow channels of the first-stage exhaust pipe 12 and the second-stage exhaust pipe 21 are respectively arranged in the first- and second-stage cooling front covers 52, the first- and second-stage cooling cylinder blocks 51, and the first- and second-stage cooling rear covers 53. In a specific structure, usually, multiple straight-through flow channels of the first-stage exhaust pipe 12 and the second-stage exhaust pipe 21 are arranged in the first- and second-stage cooling cylinder block 51. The first- and second-stage cooling front covers 52 and the first- and second-stage cooling rear covers 53 are respectively provided with communication channels for connecting multiple straight-through flow channels for connecting adjacent two first-stage exhaust pipes 12 arranged in the first- and second-stage cooling cylinder block 51. Among them, the arrangement mode of the second-stage exhaust pipe 21 is the same as that of the first-stage exhaust pipe 12. According to different structures, the straight-through flow channel can also be a bent pipe flow channel. When the first- and second-stage cooling front covers 52, the first- and second-stage cooling cylinder blocks 51, and the first- and second-stage cooling rear covers 53 are assembled, the first-stage exhaust pipe 12 and the second-stage exhaust pipe 21 are respectively integrally penetrated. The first-stage exhaust pipe 12 and the second-stage exhaust pipe 21 form a through exhaust flow channel according to the internal arrangement of the first cylinder block 5 to achieve exhaust.

[0037] Combined with the above, through the above optimization design, the first-stage exhaust pipe 12 and the second-stage exhaust pipe 21 are respectively formed after being assembled with the first- and second-stage cooling front covers 52, the first- and second-stage cooling cylinder blocks 51, and the first- and second-stage cooling rear covers 53. The structures of the first- and second-stage cooling front covers 52 and the first- and second-stage cooling rear covers 53 are particularly optimized. Utilizing the cooling effect of the coolant in the first cylinder block, gas-liquid separation can be formed in the first-stage exhaust pipe 12 and the second-stage exhaust pipe 21. Especially at the first- and second-stage cooling front covers 52 and the first- and second-stage cooling rear covers 53, a gas-liquid separation effect can be formed.

[0038] Among them, the second cylinder block 6 includes the third- and fourth-stage cooling cylinder block 61, the third- and fourth-stage cooling front cover 62, and the third- and fourth-stage cooling rear cover 63. The third- and fourth-stage cooling cylinder block 61 is arranged on one side of the crankcase 81. The third- and fourth-stage cooling front cover 62 and the third- and fourth-stage cooling rear cover 63 are arranged on both sides of the third- and fourth-stage cooling cylinder block 61. The third-stage compression cylinder 3 and the fourth-stage compression cylinder 4 are arranged in parallel in the third- and fourth-stage cooling cylinder block 61. The flow channels of the third-stage exhaust pipe 31 are respectively arranged in the third- and fourth-stage cooling front cover 62, the third- and fourth-stage cooling cylinder block 61, and the third- and fourth-stage cooling rear cover 63. In a specific structure, usually, multiple straight-through flow channels of the third-stage exhaust pipe 31 are arranged in the fourth-stage cooling cylinder block 61. According to different structures, it can also be a bent pipe flow channel. The third- and fourth-stage cooling front cover 62 and the third- and fourth-stage cooling rear cover 63 are usually arranged with multiple communication channels for connecting the straight-through flow channels of the third- and fourth-stage cooling cylinder block 61 corresponding to two third-stage exhaust pipes 31. When the third- and fourth-stage cooling front cover 62, the third- and fourth-stage cooling cylinder block 61, and the third- and fourth-stage cooling rear cover 63 are assembled, the third-stage exhaust pipe 31 is integrally penetrated. The third-stage exhaust pipe 31 forms a through exhaust flow channel according to the internal arrangement of the first cylinder block 6 to achieve exhaust. There is a third-stage cooling guide cover 631 in the third- and fourth-stage cooling rear cover 63. There is a sealing ring 632 between the third-stage cooling guide cover 631 and the third- and fourth-stage cooling rear cover 63 and the third- and fourth-stage cooling cylinder block 61. The third-stage cooling guide cover 631 is used to connect the third-stage exhaust pipe 31.

[0039] Combined with the above, through the above optimization design, the three-stage exhaust pipe 31 is formed by assembling the three-fourth stage cooling front cover 62, the three-fourth stage cooling cylinder block 61 and the three-fourth stage cooling rear cover 63. The structures of the three-fourth stage cooling front cover 62 and the three-fourth stage cooling rear cover 63 are particularly optimized. By utilizing the cooling effect of the coolant in the second cylinder block, gas-liquid separation can be formed in the three-stage exhaust pipe 31, especially at the three-fourth stage cooling front cover 62 and the three-fourth stage cooling rear cover 63, where a gas-liquid separation effect can be formed.

[0040] In combination with the above, combined with Figure 12 and Figure 13 As shown, the end of the fourth-stage exhaust pipe 41 has a fourth-stage exhaust pipe air inlet 411. The fourth-stage exhaust pipe 41 extends around the support shaft 412 to the gas-liquid separation assembly 9. The fourth-stage exhaust pipe 41 adopts a spiral surrounding structure to increase the length of the exhaust flow channel, which can extend the cooling time, improve the cooling effect, and reduce the cooling space. The gas-liquid separation assembly 9 respectively includes a separation seat 91, a gas-liquid separator 92 located below the separation seat 91, an exhaust valve 94 located on the separation seat 91, and a fourth-stage safety valve 93. The gas-liquid separator 92 is used to separate the gas discharged from the fourth-stage exhaust pipe 41. Usually, the discharged gas contains oil and compressed gas to achieve the separation of oil and compressed gas. At the same time, a fourth-stage safety valve 93 is provided for filling gas. In the specific installation structure, usually the fourth-stage exhaust pipe 41 extends into the inner cavity of the separation seat to allow gas to enter. The inner cavity of the separation seat 91 is communicated with the gas-liquid separator 92 to achieve gas-liquid separation. Combined with the exhaust valve 94, gas discharge is achieved. Combined with the fourth-stage safety valve 93, gas penetration is achieved. The fourth-stage safety valve 93 adopts a one-way valve. The bottom of the gas-liquid separator 92 is connected to a sewage discharge pipe. Usually, a sewage discharge system 120 is provided at the bottom of the whole machine. The sewage discharge system 120 is a common structure in the existing air compressor assembly to achieve sewage collection. The gas-liquid separator 92 discharges the separated oil and water into the sewage discharge system 120 through sewage discharge pipe fittings.

[0041] In combination with the above, the air filter and silencer device 7 includes a silencer housing 71 and an air filter element 72. One side of the silencer housing 71 is detachably connected to the air filter element 72, and the other side is connected to the intake pipe 11 of the first-stage compression cylinder 1 through a pipeline. A hollow pipe with small holes is coaxially arranged inside the silencer housing 71. The two ends of the hollow pipe are welded and fixed to the silencer housing. Sound-absorbing materials are filled between the hollow pipe and the silencer housing 71. After the filtered air enters the middle of the hollow pipe, air vortices are formed in the silencer housing through the small holes on the wall of the hollow pipe. Subsequently, the sound-absorbing materials weaken the airflow pulsation, thereby reducing the noise generated when sucking external gas.

[0042] In combination with the above, one side of the crankcase 81 is provided with an engine oil input end 811, an engine oil pump 812, a cooling water pump 813, and an oil-gas separator 814. Engine oil is added from the engine oil input end 811, filtered by the engine oil pump 812, and then input into the crankcase 81 to provide engine oil for the crankshaft 82. The cooling water pump 813 is connected to the first cylinder block 5 and the second cylinder block 6 to circulate the coolant inside the first cylinder block 5 and the second cylinder block 6, so that the coolant can be cooled and then recycled after the temperature returns. When the gas in the piston movement cavity runs into the cylinder block, the gas pressure inside the cylinder block becomes too high. When the gas pressure in the cylinder block is too high, the oil-gas separator 814 can adjust the gas into the piston movement cavity, and it can filter the gas, separate oil and gas, balance the pressure, and increase the pressure stabilizing effect.

[0043] In combination with the above, the primary exhaust pipe 12 and the secondary exhaust pipe 21 are both arranged inside the first cylinder block 5, and the tertiary exhaust pipe 31 and the quaternary exhaust pipe 41 are arranged inside the second cylinder block 6. The first cylinder block 5 and the second cylinder block 6 are filled with coolant to cool the gas in the air pipe and the cylinder liner 13; Figure 11 As shown, the coolant is circulated through the cooling water pump 813. The cooling water pump 813 is usually connected to a water pump inlet pipe 815 and a water pump outlet pipe 816. The water pump inlet pipe 815 and the water pump outlet pipe 816 are respectively connected to a liquid-cooled cooler 817. A cooler is usually arranged inside the liquid-cooled cooler to cool the internal circulating coolant.

[0044] In combination with the above, an instrument panel 10 is also installed above the crankcase 81. The instrument panel 10 is provided with an oil pressure gauge 101, a primary pressure gauge 102, a secondary pressure gauge 103, a tertiary pressure gauge 104, a quaternary pressure gauge 105, a tertiary temperature gauge 106, and a terminal temperature gauge 107. The oil pressure gauge 101 is used to display the oil pressure. The primary pressure gauge 102 is used to display the air pressure of the primary compression cylinder 1, the secondary pressure gauge 103 is used to display the air pressure of the secondary compression cylinder 2, the tertiary pressure gauge 104 is used to display the air pressure of the tertiary compression cylinder 3, the quaternary pressure gauge 105 is used to display the air pressure of the quaternary compression cylinder 4, the tertiary temperature gauge 106 is used to display the exhaust temperature of the tertiary compression cylinder 3, and the terminal temperature gauge 107 is used to display the exhaust temperature of the quaternary compression cylinder 4.

[0045] The working process of the present utility model:

[0046] First, the gas passes through the air filter and silencer device 7 and enters the first-stage compression cylinder 1. After being compressed by the first-stage compression cylinder 1, it is discharged through the first-stage exhaust pipe 12 and enters the second-stage compression cylinder 2. After the second-stage compression cylinder 2 compresses the gas, it is discharged through the second-stage exhaust pipe 21 and enters the third-stage compression cylinder 3. After the third-stage compression cylinder 3 compresses the gas, it is discharged through the third-stage exhaust pipe 31 and enters the fourth-stage compression cylinder 4. After the fourth-stage compression cylinder 4 compresses the gas, it is discharged through the fourth-stage exhaust pipe 41 and enters the gas-liquid separation assembly 9. After the gas-liquid separation assembly 9 separates the gas and the liquid, it is discharged through the fourth-stage safety valve after separation and filled into the required equipment. The first-stage exhaust pipe 12, the second-stage exhaust pipe 21, the third-stage exhaust pipe 31 and the gas-liquid separation assembly 9 are respectively arranged in the first cylinder block 5 and the second cylinder block 6. After passing through four-stage water cooling, the temperature of the gas is greatly reduced.

[0047] It can be understood that the present utility model is described by means of some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A multi-stage liquid-cooled piston compressor, comprising a first-stage compression cylinder (1), a second-stage compression cylinder (2), a third-stage compression cylinder (3), a fourth-stage compression cylinder (4), a first cylinder body (5), a second cylinder body (6) and a gas-liquid separation assembly (9), characterized in that: The first-stage compression cylinder (1) and the second-stage compression cylinder (2) are arranged in parallel in a first cylinder body (5), the third-stage compression cylinder (3) and the fourth-stage compression cylinder (4) are arranged in parallel in a second cylinder body (6), the gas-liquid separation assembly (9) is arranged on one side of the second cylinder body (6), the first-stage exhaust pipe (12) of the first-stage compression cylinder (1) is connected to the second-stage compression cylinder (2), the second-stage exhaust pipe (21) of the second-stage compression cylinder (2) is connected to the third-stage compression cylinder (3), the third-stage exhaust pipe (31) of the third-stage compression cylinder (3) is connected to the fourth-stage compression cylinder (4), the fourth-stage exhaust pipe (41) of the fourth-stage compression cylinder (4) is connected to the gas-liquid separation assembly (9), the first-stage exhaust pipe (12) and the second-stage exhaust pipe (21) are both arranged in the first cylinder body (5), the third-stage exhaust pipe (31) is arranged in the second cylinder body (6), and the first cylinder body (5) and the second cylinder body (6) have cooling liquid in them.

2. The multi-stage liquid-cooled piston compressor according to claim 1, characterized in that: The invention comprises a driving component (8), wherein the first cylinder body (5) and the third and fourth stages of cooling water are respectively fixedly arranged on both sides of the driving component (8); the driving component (8) comprises a crankcase (81), a crankshaft (82), a pulley (83), a connecting rod one (84), a connecting rod two (85), a connecting rod three (86), and a connecting rod four (87); the crankshaft (82) is arranged in the crankcase (81); the pulley (83) is arranged on one side of the crankcase (81) and is fixedly connected to the crankshaft (82); the connecting rod one (84), the connecting rod two (85), the connecting rod three (86), and the connecting rod four (87) are connected to the crankshaft (82) and are respectively fixedly connected to the piston rods of the first stage compression cylinder (1), the second stage compression cylinder (2), the third stage compression cylinder (3), and the fourth stage compression cylinder (4).

3. The multi-stage liquid-cooled piston compressor according to claim 2, characterized in that: One side of the crankcase (81) is provided with an oil input end (811), an oil pump (812), a cooling water pump (813) and an oil-gas separator (814); the oil input end (811) is used for adding oil, the oil pump (812) is used for filtering oil, and the cooling water pump (813) is used for cooperating with a cooling pump to realize cooling circulation of the coolant.

4. The multi-stage liquid-cooled piston compressor according to claim 3, characterized in that: A dashboard (10) is also installed above the crankcase (81). The dashboard (10) has an oil pressure gauge (101), a first-stage pressure gauge (102), a second-stage pressure gauge (103), a third-stage pressure gauge (104), a fourth-stage pressure gauge (105), a third-stage temperature gauge (106), and a terminal temperature gauge (107). The oil pressure gauge (101) is used to display the oil pressure, the first-stage pressure gauge (102) is used to display the air pressure of the first-stage compression cylinder (1), the second-stage pressure gauge (103) is used to display the air pressure of the second-stage compression cylinder (2), the third-stage pressure gauge (104) is used to display the air pressure of the third-stage compression cylinder (3), and the fourth-stage pressure gauge (105) is used to display the air pressure of the fourth-stage compression cylinder (4).

5. The multi-stage liquid-cooled piston compressor according to claim 1, characterized in that: It also includes an air filter silencer (7), which is arranged on the same side of the first cylinder body (5), and is connected to the first-stage compression cylinder (1) through an air intake pipe (11).

6. The multi-stage liquid-cooled piston compressor according to claim 5, characterized in that: The air filter silencer (7) comprises a silencer housing (71) and an air filter element (72); one side of the silencer housing (71) is detachably connected to the air filter element (72); the other side of the silencer housing (71) is connected to the air intake pipe (11) of the first-stage compression cylinder (1) via a pipeline; a hollow tube covered with small holes is coaxially arranged inside the silencer housing (71); both ends of the hollow tube are welded and fixed to the silencer housing (71); and a silencer material is filled between the hollow tube and the silencer housing (71).

7. The multi-stage liquid-cooled piston compressor according to any one of claims 1 to 6, characterized in that: The first cylinder body (5) comprises a first and second cooling cylinder body (51), a first and second cooling front cover (52) and a first and second cooling rear cover (53); the first and second cooling cylinder body (51) is arranged on one side of a crankcase (81); the first and second cooling front cover (52) and the first and second cooling rear cover (53) are arranged on both sides of the first and second cooling cylinder body (51); the first compression cylinder (1) and the second compression cylinder (2) are arranged in parallel in the first and second cooling cylinder body (51); the flow passages of the first exhaust pipe (12) and the second exhaust pipe (21) are arranged in the first and second cooling front cover (52), the first and second cooling cylinder body (51) and the first and second cooling rear cover (53), respectively; when the first and second cooling front cover (52), the first and second cooling cylinder body (51) and the first and second cooling rear cover (53) are assembled, the first exhaust pipe (12) and the second exhaust pipe (21) are respectively connected as a whole.

8. The multi-stage liquid-cooled piston compressor according to claim 7, characterized in that: The second cylinder block (6) comprises a three-stage cooling cylinder block (61), a three-stage cooling front cover (62) and a three-stage cooling rear cover (63); the three-stage cooling cylinder block (61) is arranged on one side of the crankcase (81); the three-stage cooling front cover (62) and the three-stage cooling rear cover (63) are arranged on both sides of the three-stage cooling cylinder block (61); the three-stage compression cylinder (3) and the four-stage compression cylinder (4) are arranged in parallel in the three-stage cooling cylinder block (61); the flow passages of the three-stage exhaust pipe (31) are arranged in the three-stage cooling front cover (62), the three-stage cooling cylinder block (61) and the three-stage cooling rear cover (63); when the three-stage cooling front cover (62), the three-stage cooling cylinder block (61) and the three-stage cooling rear cover (63) are assembled, the three-stage exhaust pipe (31) is connected as a whole.

9. The multi-stage liquid-cooled piston compressor according to claim 8, characterized in that: The third- and fourth-stage cooling rear cover (63) has a third-stage cooling guide cover (631) inside, a sealing ring (632) is provided between the third- and fourth-stage cooling guide cover (631), the third- and fourth-stage cooling rear cover (63) and the third- and fourth-stage cooling cylinder body (61), and the third-stage cooling guide cover (631) is used to connect to the third-stage exhaust pipe (31).

10. The multi-stage liquid-cooled piston compressor according to claim 9, characterized in that: The end of the four-stage exhaust pipe (41) is provided with a four-stage exhaust pipe air inlet (411), the four-stage exhaust pipe (41) surrounds the support shaft (412) and extends to the gas-liquid separation assembly (9), and the four-stage exhaust pipe (41) adopts a spiral surround structure.

Images