Screw gas compressor

Abstract

The invention belongs to the field of screw compressors, and particularly relates to a screw gas compressor which comprises a base, a machine shell is arranged in the middle of the upper portion of the base, partition plates are fixedly arranged on the left side and the right side of the interior of the machine shell, and the partition plates divide the interior of the machine shell into a first cavity, a second cavity and a third cavity in sequence from left to right; and a female screw and a male screw which are symmetrically distributed front and back are rotationally arranged in the second cavity, the female screw and the male screw are matched with each other but do not make contact with each other, oil storage cylinders are fixedly arranged on the left side and the right side of the upper portion of the base correspondingly, and a cavity is formed in the machine shell. In the air compression process, the machine shell can be cooled, lubricating oil can be cooled, normal operation of air compression work is guaranteed, meanwhile, heat of the machine shell and heat of the lubricating oil can be used for preheating air entering the air inlet pipe, and the air compression efficiency is improved. And the compression efficiency of the compressor can be improved and the energy consumption of the compressor can be reduced during air compression.

Description

Technical Field

[0001] The invention belongs to the field of screw compressors, and in particular relates to a screw gas compressor. Background Art

[0002] The screw gas compressor is mainly composed of yin and yang rotors, casing and lubrication components. The working principle is that the yin and yang rotors rotate with each other, the volume of the working chamber on the intake side expands to inhale gas, and as the rotor rotates, the volume of the working chamber shrinks, the gas is compressed, and finally the high-pressure gas is discharged from the exhaust port. Screw gas compressors can generally be divided into dry screw gas compressors and wet screw gas compressors. In the operation of dry screw gas compressors, there is no direct contact between the rotors and between the rotors and the casing. There is no oil injection in the compression chamber, and only the gear set and the bearing set are lubricated.

[0003] Although dry screw gas compressors can directly output high-quality compressed gas during operation, compared to wet screw compressors, there is no oil cooling in the compression chamber, which leads to a higher temperature of the casing during operation. The casing is in a high temperature state for a long time and its size and shape may change due to thermal expansion, thereby affecting the clearance between the rotor and the casing. The change in the clearance may increase the gas leakage and reduce the compression efficiency of the compressor, which in turn affects the normal working performance of the dry screw gas compressor. Summary of the invention

[0004] In view of the above problems, an embodiment of the present application provides a screw gas compressor, which can preheat the compressed air by utilizing the absorbed heat during the process of dissipating heat from the casing and cooling the lubricant, so as to improve the compression efficiency of the compressor and reduce the energy consumption of the compressor.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solution: The present invention provides a screw gas compressor, including a base, a casing is arranged at the middle position of the upper part of the base, and partitions are fixedly arranged on the left and right sides of the interior of the casing, and the partitions divide the interior of the casing into a first chamber, a second chamber and a third chamber from left to right, and a female screw and a male screw symmetrically distributed front and back are rotatably arranged in the second chamber, and the female screw and the male screw cooperate with each other but do not contact, and oil storage cylinders are fixedly arranged on the left and right sides of the upper part of the base, and a cavity is opened inside the casing, and a heat dissipation mechanism is jointly arranged inside the cavity and between the two oil storage cylinders.

[0006] The heat dissipation mechanism includes a spiral tube fixedly arranged in the cavity, both ends of the spiral tube pass through the cavity, a first air duct is connected between the front sides of the two oil storage cylinders, a second air duct is connected between the front sides of the two oil storage cylinders, one end of the spiral tube is connected to the first air duct, and a third air duct is connected to the second air duct.

[0007] An air inlet assembly used in conjunction with a heat dissipation mechanism is disposed on the upper left side of the housing, an air outlet pipe is fixedly disposed on the bottom right side of the housing, and the top end of the air outlet pipe penetrates into the second chamber.

[0008] According to a favorable embodiment, connecting rods are fixedly provided at both left and right ends of the female screw and the male screw, the two connecting rods on the left side both penetrate into the first chamber and are rotatably connected to the left inner wall of the first chamber, the two connecting rods on the right side both penetrate into the third chamber and are rotatably connected to the right inner wall of the third chamber, bearings are fixedly provided on the outer sides of the connecting rods, and gears are fixedly provided on the two connecting rods on the left side, the two gears are meshed with each other, a motor is fixedly provided on the right side of the casing, and the output shaft of the motor is connected to the right end of one of the connecting rods on the right side.

[0009] According to a favorable embodiment, a filter plate is fixedly provided at the inner upper end of the oil storage cylinder, a serpentine groove is opened inside the filter plate, a first serpentine tube is fixedly provided in the serpentine groove, and both ends of the first serpentine tube are respectively connected to the first air duct and the second air duct.

[0010] According to a favorable embodiment, the air intake assembly includes an air intake pipe fixedly arranged on the left side of the upper portion of the casing, the bottom end of the air intake pipe passes through the second chamber, a temperature sensor is arranged inside the air intake pipe, and a ventilation pipe is arranged at the upper portion of the air intake pipe, and the ventilation pipe is connected to an end of the third air duct away from the second air duct.

[0011] According to a favorable embodiment, a cooling mechanism for use with an air intake assembly is provided between the two oil storage cylinders, the cooling mechanism comprising a second serpentine tube fixedly provided at the lower end of the interior of the oil storage cylinder, a fourth air duct is provided in communication between the two second serpentine tubes, a fifth air duct is provided in communication on the fourth air duct, and an end of the fifth air duct away from the fourth air duct is connected to the ventilation pipe.

[0012] According to an advantageous embodiment, one end of the second serpentine tube away from the fourth air duct passes through the oil storage cylinder, and one end of the second serpentine tube away from the fourth air duct and one end of the spiral tube away from the first air duct are both provided with filter sleeves.

[0013] According to a favorable embodiment, a plurality of downwardly inclined blocking blocks are fixedly provided on the front and rear inner walls of the ventilation pipe, and two adjacent blocking blocks are staggered in an up-and-down manner.

[0014] According to a favorable embodiment, an oil supply mechanism for use with an oil storage cylinder is provided at the bottom of the casing, and the oil supply mechanism includes an oil pump fixedly arranged at the bottom of the casing, a No. 1 tee is provided at the input end of the oil pump, and the left and right ends of the No. 1 tee respectively penetrate into the corresponding oil storage cylinder, and a No. 2 tee is provided at the output end of the oil pump, and the left and right ends of the No. 2 tee are respectively connected with oil inlet pipes, the oil inlet pipe on the left side penetrates into the first chamber, and the oil inlet pipe on the right side penetrates into the second chamber.

[0015] According to a favorable embodiment, oil return pipes are fixedly arranged on the left and right sides of the bottom of the casing, the oil return pipe on the left side penetrates into the first chamber, the oil return pipe on the right side penetrates into the second chamber, and the bottom ends of the two oil return pipes respectively penetrate into corresponding oil storage cylinders.

[0016] According to an advantageous embodiment, the third air guide pipe is connected to an exhaust pipe, and a one-way valve is provided on the exhaust pipe.

[0017] Compared with the prior art, a screw gas compressor provided by an embodiment of the present invention has the following beneficial effects:

[0018] 1. In the process of compressing air, the present invention utilizes the cooperation of the heat dissipation mechanism and the cooling mechanism, which can not only dissipate the heat of the casing and cool the lubricating oil, thereby ensuring the normal operation of the compressed air, but also utilize the heat of the casing and the heat of the lubricating oil to preheat the air entering the intake pipe, thereby improving the compression efficiency of the compressor and reducing the energy consumption of the compressor when compressing air.

[0019] 2. The present invention is provided with a heat dissipation mechanism and a cooling mechanism. When the outside air is compressed, when the outside air enters the intake pipe through the spiral tube, the casing can be quickly cooled. At the same time, when the air enters the intake pipe through the second serpentine tube, the lubricating oil in the oil storage cylinder can be cooled to ensure the use effect of the lubricating oil, thereby ensuring the normal operation of the compressed air.

[0020] 3. The present invention is provided with a partition plate, a temperature sensor and an exhaust pipe. When the outside air enters the ventilation pipe through the third air duct and the fifth air duct, the heat of the casing and the heat of the lubricating oil can be used to preheat the air, so that the air entering the intake pipe has a certain temperature, and then the partition plate is used to make the air evenly mixed in the ventilation pipe, so that the temperature is more stable when entering the second chamber, thereby reducing the energy consumption of the compressor when compressing the air.

[0021] 4. The present invention is provided with a first serpentine tube. When the air in the spiral tube enters the first serpentine tube, the heat of the casing can be used to keep the filter plate warm, which can effectively prevent the lubricating oil on the filter plate from solidifying when the air is compressed in a low-temperature environment, thereby ensuring the filtering effect of the filter plate on the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of the first viewing angle of the present invention.

[0023] Figure 2 This is a structural diagram of the second viewing angle of the present invention.

[0024] Figure 3 It is a partial cross-sectional structural diagram of the present invention.

[0025] Figure 4 It is a cross-sectional structural diagram of the air intake assembly in the present invention.

[0026] Figure 5 It is a cross-sectional structural diagram of the connection between the heat dissipation mechanism and the oil storage cylinder in the present invention.

[0027] Figure 6 It is a cross-sectional structural diagram of the connection between the first serpentine tube and the filter plate in the present invention.

[0028] Figure 7 It is a cross-sectional structural diagram of the connection between the cooling mechanism and the oil storage cylinder in the present invention.

[0029] Figure 8 It is a structural diagram of the connection between the oil supply mechanism and the oil storage cylinder in the present invention.

[0030] Fig. 9 It is a cross-sectional structural diagram of the oil storage cylinder in the present invention.

[0031] Reference numerals in the figure: 1, base; 2, housing; 3, partition; 4, first chamber; 5, second chamber; 6, third chamber; 7, female screw; 8, male screw; 9, oil storage cylinder; 10, cavity; 11, heat dissipation mechanism; 111, spiral tube; 112, first air duct; 113, second air duct; 114, third air duct; 12, air intake assembly; 121, air intake pipe; 122, ventilation pipe; 13, air outlet pipe; 14, connecting rod; 15, shaft Bearing; 16. Gear; 17. Motor; 18. Filter plate; 19. First serpentine pipe; 20. Temperature sensor; 21. Cooling mechanism; 211. Second serpentine pipe; 212. Fourth air duct; 213. Fifth air duct; 22. Filter sleeve; 23. Block; 24. Oil supply mechanism; 241. Oil pump; 242. No. 1 three-way pipe; 243. No. 2 three-way pipe; 244. Oil inlet pipe; 25. Oil return pipe; 26. Exhaust pipe; 27. One-way valve. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-9 This application is further described in detail.

[0033] Please refer to Figure 1 , Figure 2 and Figure 3 A screw gas compressor comprises a base 1, a housing 2 is arranged at the middle position of the upper part of the base 1, partitions 3 are fixedly arranged on the left and right sides of the housing 2, and the partitions 3 divide the interior of the housing 2 from left to right into a first chamber 4, a second chamber 5 and a third chamber 6, and a female screw 7 and a male screw 8 are rotatably arranged in the second chamber 5 and are symmetrically distributed front and back, and the female screw 7 and the male screw 8 cooperate with each other but do not contact, and the left and right ends of the female screw 7 and the male screw 8 are fixedly arranged with connecting rods 14, and the two left ends are located at the left side. Each connecting rod 14 passes through the first chamber 4 and is rotatably connected to the left inner wall of the first chamber 4. The two connecting rods 14 on the right side pass through the third chamber 6 and are rotatably connected to the right inner wall of the third chamber 6. A bearing 15 is fixedly provided on the outer side of the connecting rod 14, and gears 16 are fixedly provided on the two connecting rods 14 on the left side. The two gears 16 are meshed with each other. A motor 17 is fixedly provided on the right side of the casing 2, and the output shaft of the motor 17 is connected to the right end of one of the connecting rods 14 on the right side.

[0034] See also Figure 1 , Figure 2 and Figure 3 The left and right sides of the upper part of the base 1 are fixedly provided with oil storage cylinders 9, the interior of the housing 2 is provided with a cavity 10, and a heat dissipation mechanism 11 is provided between the interior of the cavity 10 and the two oil storage cylinders 9. The left side of the upper part of the housing 2 is provided with an air intake assembly 12 used in conjunction with the heat dissipation mechanism 11, and the right side of the bottom of the housing 2 is fixedly provided with an air outlet pipe 13, and the top end of the air outlet pipe 13 penetrates into the second chamber 5.

[0035] When the air is compressed, the motor 17 drives the corresponding connecting rod 14 to rotate, and the rotation of the connecting rod 14 drives the gear 16 to rotate, so that the two counter-rotating gears 16 can drive the female screw 7 and the male screw 8 to rotate in the opposite direction. The reverse rotation of the female screw 7 and the male screw 8 can suck the outside air from the air intake assembly 12 into the second chamber 5, and then the air entering the second chamber 5 can be compressed. The compressed air can be discharged through the outlet pipe 13. In the process of compressing the air, the heat dissipation mechanism 11 can be used to dissipate the heat of the casing 2 to ensure the normal operation of the compressed air.

[0036] See also Figure 1 , Figure 2 and Figure 8The bottom of the casing 2 is provided with an oil supply mechanism 24 for use with the oil storage cylinder 9. The oil supply mechanism 24 includes an oil pump 241 fixedly arranged at the bottom of the casing 2. A No. 1 three-way pipe 242 is provided at the input end of the oil pump 241. The left and right ends of the No. 1 three-way pipe 242 respectively penetrate into the corresponding oil storage cylinder 9. A No. 2 three-way pipe 243 is provided at the output end of the oil pump 241. The left and right ends of the No. 2 three-way pipe 243 are respectively connected with oil inlet pipes 244. The oil inlet pipe 244 on the left side penetrates into the first chamber 4, and the oil inlet pipe 244 on the right side penetrates into the second chamber 5.

[0037] See also Figure 5 and Figure 8 A filter plate 18 is fixedly provided at the inner upper end of the oil storage cylinder 9, and return oil pipes 25 are fixedly provided on the left and right sides of the bottom of the casing 2. The return oil pipe 25 on the left side penetrates into the first chamber 4, and the return oil pipe 25 on the right side penetrates into the second chamber 5. The bottom ends of the two return oil pipes 25 respectively penetrate into the corresponding oil storage cylinders 9.

[0038] In order to lubricate and cool the gears 16 and bearings 15 during the rotation process, the oil pump 241 can work regularly during the operation of the motor 17. The oil pump 241 can extract the lubricating oil in the oil storage cylinder 9 through the No. 1 three-way pipe 242, and then the lubricating oil enters the corresponding oil inlet pipe 244 through the No. 2 three-way pipe 243. Finally, the lubricating oil enters the first chamber 4 and the third chamber 6 respectively through the corresponding oil inlet pipe 244, so that the rotating gears 16 and bearings 15 can be lubricated and cooled to ensure the normal operation of the compressed air. Then the lubricating oil can enter the interior of the oil storage cylinder 9 through the return oil pipe 25. When the lubricating oil lubricates and cools the gears 16 and bearings 15, the gears 15 and bearings 16 will produce wear during long-term use, and these wears will produce metal debris. Therefore, when the lubricating oil returns to the oil storage cylinder 9, the filter plate 18 can be used to filter the lubricating oil so that the lubricating oil can be recycled.

[0039] See also Figure 5 The heat dissipation mechanism 11 includes a spiral tube 111 fixedly arranged in the cavity 10, both ends of the spiral tube 111 pass through the cavity 10, a first air guide pipe 112 is connected between the front sides of the two oil storage cylinders 9, a second air guide pipe 113 is connected between the front sides of the two oil storage cylinders 9, one end of the spiral tube 111 is connected to the first air guide pipe 112, and the second air guide pipe 113 is connected to the third air guide pipe 114.

[0040] See also Figure 6 A serpentine groove is provided inside the filter plate 18 , in which a first serpentine tube 19 is fixedly disposed, and two ends of the first serpentine tube 19 are respectively connected to the first air guide tube 112 and the second air guide tube 113 .

[0041] See also Figure 2 and Figure 4 The air intake assembly 12 includes an air intake pipe 121 fixedly arranged on the upper left side of the casing 2, the bottom end of the air intake pipe 121 penetrates into the second chamber 5, and the upper part of the air intake pipe 121 is connected with a ventilation pipe 122, which is connected to one end of the third air duct 114 away from the second air duct 113.

[0042] See also Figure 2 , Figure 5 , Figure 7 and Fig. 9 A cooling mechanism 21 used in conjunction with the air intake assembly 12 is provided between the two oil storage cylinders 9. The cooling mechanism 21 includes a second serpentine tube 211 fixedly provided at the lower end of the interior of the oil storage cylinder 9. A fourth air guide tube 212 is provided in communication between the two second serpentine tubes 211. A fifth air guide tube 213 is provided in communication with the fourth air guide tube 212. The end of the fifth air guide tube 213 away from the fourth air guide tube 212 is in communication with the ventilation tube 122. The end of the second serpentine tube 211 away from the fourth air guide tube 212 passes through the oil storage cylinder 9, and a filter sleeve 22 is provided at the end of the second serpentine tube 211 away from the fourth air guide tube 212 and the end of the spiral tube 111 away from the first air guide tube 112.

[0043] In order to dissipate heat from the casing 2 and cool the lubricating oil during the process of compressing the air, during the reverse rotation of the female screw 7 and the male screw 8, the external air will first be filtered by the filter sleeve 22 to remove impurities and particulate matter in the air, and then the air will enter the spiral tube 111 and the second serpentine tube 211. The air entering the spiral tube 111 will enter the first air duct 112, and then the air will enter the first serpentine tube 19 and the second air duct 113 in sequence. Finally, the air will enter the vent 122 through the third air duct 114, and at the same time, the air will enter the second serpentine tube 211 and then enter the fourth air duct 212, and then enter the vent 122 through the fifth air duct 213. Finally, the air in the vent 122 enters the second chamber 5 through the air inlet pipe 121 for compression, and the compressed air is discharged through the air outlet pipe 13.

[0044] When the air enters the corresponding first air guide pipe 112 from the spiral tube 111, it can take away the heat on the first casing 2, so that the casing 2 can be quickly cooled. Since the oil pump 241 works intermittently during the air compression process, when the external environment is relatively cold, the lubricating oil remaining on the filter plate 18 is easy to solidify and block the filter holes. When the air entering the spiral tube 111 enters the first serpentine tube 19, the air takes away the heat of the casing 2 and makes it have a certain amount of heat. This heat can be used to keep the filter plate 18 warm, so that the normal use of the filter plate 18 can be guaranteed.

[0045] At the same time, when the air enters the fourth air duct 212 from the second serpentine tube 211, heat exchange can occur with the lubricating oil in the oil storage cylinder 9, which can effectively cool the lubricating oil in the oil storage cylinder 9 and reduce the temperature of the lubricating oil, thereby ensuring the normal use of the subsequent lubricating oil.

[0046] See also Figure 4 and Figure 5 A temperature sensor 20 is provided inside the air intake pipe 121, an exhaust pipe 26 is connected to the third air guide pipe 114, and a one-way valve 27 is provided on the exhaust pipe 26. A plurality of downwardly inclined blocking blocks 23 are fixedly provided on the front and rear inner walls of the vent pipe 122, and two adjacent blocking blocks 23 are staggered in an up-and-down manner.

[0047] In order to reduce the energy consumption in the process of compressing air, when the outside air enters the interior of the ventilation pipe 122 through the spiral tube 111 and the second serpentine tube 211, the heat of the casing 2 and the heat of the lubricating oil can be used to preheat the air, so that the temperature of the air entering the ventilation pipe 122 will be slightly higher than normal temperature. During the compression process, for the same compression ratio, the compression work required for the preheated gas during the compression process is relatively reduced, which can improve the working efficiency of the compressor and reduce the energy consumption of the compressor. After the outside air enters the ventilation pipe 122 through the third air duct 114 and the fifth air duct 213 respectively, the partition plate 3 can be used to increase the flow path of the air in the ventilation pipe 122, so that the air has more sufficient time to be evenly mixed in the ventilation pipe 122, so that the temperature is more stable when entering the second chamber 5, thereby ensuring the normal compression of the air.

[0048] At the same time, when the temperature sensor 20 detects that the temperature entering the air intake pipe 121 is high, since the air temperature in the third air duct 114 is higher than the air temperature in the fifth air duct 213, the one-way valve 27 on the exhaust pipe 26 can be opened at this time, so that a part of the air entering the third air duct 114 can be directly discharged, reducing the amount of air entering the ventilation pipe 122, thereby balancing the air temperature entering the ventilation pipe 122, and will not affect the operation of the compressed air.

[0049] During specific operation, when the air is compressed, the motor 17 can drive the female screw 7 and the male screw 8 to rotate in opposite directions. At this time, the outside air will enter the spiral tube 111 and the second serpentine tube 211, and then enter the ventilation pipe 122 together, and finally enter the second chamber 5 from the air inlet pipe 121 for compression. The compressed air can be discharged through the air outlet pipe 13.

[0050] In the process of compressing the air, when the outside air enters the spiral tube 111 and the second serpentine tube 211, the heat can be dissipated from the casing 2 and the lubricating oil can be cooled respectively, which not only ensures the normal operation of the compressed air, but also uses the heat of the casing 2 and the heat of the lubricating oil to preheat the air entering the intake pipe 121, thereby improving the compression efficiency and reducing energy consumption when compressing the air, and can also insulate the filter plate 18, so that the lubricating oil remaining on the filter plate 18 is not easy to solidify and block the filter holes, further ensuring the normal operation of the compressed air.

[0051] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A screw gas compressor, comprising a base (1), characterized in that: A housing (2) is arranged at the middle position of the upper part of the base (1), and partitions (3) are fixedly arranged on both the left and right sides of the housing (2), and the partitions (3) divide the interior of the housing (2) into a first chamber (4), a second chamber (5) and a third chamber (6) from left to right. A female screw (7) and a male screw (8) are rotatably arranged in the second chamber (5) and are symmetrically distributed in front and back, and the female screw (7) and the male screw (8) cooperate with each other but do not contact each other. Oil storage cylinders (9) are fixedly arranged on both the left and right sides of the upper part of the base (1), and a cavity (10) is opened inside the housing (2), and a heat dissipation mechanism (11) is arranged in the cavity (10) and between the two oil storage cylinders (9); The heat dissipation mechanism (11) comprises a spiral tube (111) fixedly arranged in the cavity (10), both ends of the spiral tube (111) pass through the cavity (10), a first air guide tube (112) is arranged in communication between the front sides of the two oil storage cylinders (9), a second air guide tube (113) is arranged in communication between the front sides of the two oil storage cylinders (9), one end of the spiral tube (111) is in communication with the first air guide tube (112), and a third air guide tube (114) is arranged in communication with the second air guide tube (113); An air intake assembly (12) for use with a heat dissipation mechanism (11) is arranged on the upper left side of the casing (2), and an air outlet pipe (13) is fixedly arranged on the bottom right side of the casing (2), and the top end of the air outlet pipe (13) penetrates into the second chamber (5).

2. A screw gas compressor according to claim 1, characterized in that: Connecting rods (14) are fixedly provided at both left and right ends of the female screw rod (7) and the male screw rod (8); the two connecting rods (14) on the left side penetrate the first chamber (4) and are rotatably connected to the left inner wall of the first chamber (4); the two connecting rods (14) on the right side penetrate the third chamber (6) and are rotatably connected to the right inner wall of the third chamber (6); bearings (15) are fixedly provided on the outer sides of the connecting rods (14); gears (16) are fixedly provided on the two connecting rods (14) on the left side; the two gears (16) are meshed with each other; a motor (17) is fixedly provided on the right side of the housing (2); the output shaft of the motor (17) is connected to the right end of one of the connecting rods (14) on the right side.

3. A screw gas compressor according to claim 1, characterized in that: A filter plate (18) is fixedly arranged at the upper end of the oil storage cylinder (9), a serpentine groove is provided inside the filter plate (18), a first serpentine tube (19) is fixedly arranged in the serpentine groove, and two ends of the first serpentine tube (19) are respectively connected to the first air guide tube (112) and the second air guide tube (113).

4. A screw gas compressor according to claim 1, characterized in that: The air intake assembly (12) comprises an air intake pipe (121) fixedly arranged on the left side of the upper part of the casing (2); the bottom end of the air intake pipe (121) penetrates into the second chamber (5); a temperature sensor (20) is arranged inside the air intake pipe (121); a ventilation pipe (122) is arranged at the upper part of the air intake pipe (121); and the ventilation pipe (122) is connected to an end of the third air guide pipe (114) away from the second air guide pipe (113).

5. A screw gas compressor according to claim 4, characterized in that: A cooling mechanism (21) for use with an air intake assembly (12) is arranged between the two oil storage cylinders (9), the cooling mechanism (21) comprising a second serpentine tube (211) fixedly arranged at the lower end of the interior of the oil storage cylinder (9), a fourth air guide tube (212) being arranged in communication between the two second serpentine tubes (211), a fifth air guide tube (213) being arranged in communication with the fourth air guide tube (212), and an end of the fifth air guide tube (213) away from the fourth air guide tube (212) being in communication with the ventilation tube (122).

6. A screw gas compressor according to claim 5, characterized in that: One end of the second serpentine tube (211) away from the fourth air guide tube (212) passes through the oil storage cylinder (9), and one end of the second serpentine tube (211) away from the fourth air guide tube (212) and one end of the spiral tube (111) away from the first air guide tube (112) are both provided with a filter sleeve (22).

7. A screw gas compressor according to claim 4, characterized in that: A plurality of downwardly inclined blocking blocks (23) are fixedly arranged on the front and rear inner walls of the ventilation pipe (122), and two adjacent blocking blocks (23) are arranged in an up-and-down staggered manner.

8. A screw gas compressor according to claim 1, characterized in that: The bottom of the casing (2) is provided with an oil supply mechanism (24) for use with the oil storage cylinder (9), and the oil supply mechanism (24) comprises an oil pump (241) fixedly arranged at the bottom of the casing (2), a No. 1 three-way pipe (242) is arranged at the input end of the oil pump (241), and the left and right ends of the No. 1 three-way pipe (242) respectively penetrate into the corresponding oil storage cylinder (9), and the output end of the oil pump (241) is provided with a No. 2 three-way pipe (243), and the left and right ends of the No. 2 three-way pipe (243) are respectively connected with oil inlet pipes (244), the oil inlet pipe (244) located on the left side penetrates into the first chamber (4), and the oil inlet pipe (244) located on the right side penetrates into the second chamber (5).

9. A screw gas compressor according to claim 1, characterized in that: Oil return pipes (25) are fixedly arranged on both left and right sides of the bottom of the casing (2); the oil return pipe (25) on the left side penetrates into the first chamber (4), and the oil return pipe (25) on the right side penetrates into the second chamber (5); the bottom ends of the two oil return pipes (25) respectively penetrate into corresponding oil storage cylinders (9).

10. The screw gas compressor according to claim 1, characterized in that: The third air guide pipe (114) is connected to an exhaust pipe (26), and a one-way valve (27) is provided on the exhaust pipe (26).

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