An oil-gas separator for a helium compressor

Abstract

This application relates to the technical field of helium compressor supporting equipment, and in particular to an oil-gas separator for a helium compressor, including a primary separator, a secondary separator, and a separator connecting pipe. The primary separator has a built-in primary filter element that divides its inner cavity into a primary inlet chamber and a primary outlet chamber. The primary separator has an oil-gas mixture inlet pipe connected to the primary inlet chamber and a primary outlet port connected to the primary outlet chamber. The secondary separator has a built-in secondary filter element and has a secondary inlet port connected to the inner cavity of the secondary filter element and an exhaust port for discharging gas filtered by the secondary filter element. One end of the separator connecting pipe is connected to the primary outlet port, and the other end of the separator connecting pipe is connected to the secondary inlet port. This application has the effect of extending the operating time of the helium compressor.

Description

Technical Field

[0001] This application relates to the technical field of helium compressor supporting equipment, and in particular to an oil-gas separator for a helium compressor. Background Technology

[0002] A helium compressor is a drive unit for cryogenic pump systems or other refrigeration units, used to supply high-purity helium to cryogenic pumps or other refrigeration units. It is commonly used in aerospace, military research, electronic manufacturing, and LCD panel manufacturing.

[0003] The maintenance cycle of a helium compressor depends on the oil content in the working medium (helium) after passing through the oil-gas separator. Therefore, to extend the operating cycle of a helium compressor, it is necessary to reduce the oil content in the helium after oil-gas separation. Currently, the helium content after processing by existing oil-gas separators is relatively high, resulting in the helium compressor requiring maintenance after 10,000-15,000 hours of operation. Further improvements are needed. Utility Model Content

[0004] In order to extend the operating time of a helium compressor, this application provides an oil-gas separator for a helium compressor.

[0005] The oil-gas separator for a helium compressor provided in this application adopts the following technical solution:

[0006] An oil-gas separator for a helium compressor includes a primary separator, a secondary separator, and a separator connecting pipe. The primary separator has a primary filter element that divides its inner cavity into a primary inlet chamber and a primary outlet chamber. The primary separator has an oil-gas mixture inlet pipe connected to the primary inlet chamber and a primary outlet port connected to the primary outlet chamber. The secondary separator has a secondary filter element and has a secondary inlet port connected to the inner cavity of the secondary filter element and an exhaust port for discharging gas filtered by the secondary filter element. One end of the separator connecting pipe is connected to the primary outlet port, and the other end of the separator connecting pipe is connected to the secondary inlet port.

[0007] By adopting the above technical solution, the oil-gas mixture first enters the primary separator through the oil-gas mixture inlet pipe. After separation by the primary filter element, the primary filter element effectively intercepts most of the oil droplets. The gas then enters the inner cavity of the secondary filter element of the secondary separator through the separator connecting pipe. After secondary separation by the secondary filter element, the remaining tiny oil particles are further purified. Subsequently, the gas enters the gas-using equipment through the exhaust port. This can significantly reduce the oil content in helium, effectively extend the fault-free operation time of the helium compressor, and reduce the maintenance frequency.

[0008] Preferably, the primary filter element includes two filter baffles distributed along the axial direction of the primary separator and fixedly connected to the inner wall of the primary separator, and wool felt filled between the two filter baffles. The filter baffles are porous plates.

[0009] By adopting the above technical solution, the filter baffles perform initial blocking and diversion, so that larger oil droplets in the oil-gas mixture are effectively separated. Subsequently, the oil-gas mixture enters the wool felt filled between the two filter baffles, and the wool felt further filters the oil-gas mixture, adsorbing the tiny oil droplets in it.

[0010] Preferably, the secondary separator has a built-in partition that divides the inner cavity into a secondary separation chamber and a tertiary separation chamber. The secondary filter element includes a secondary filter element fixedly connected to the partition and built into the secondary separation chamber, and a tertiary filter element fixedly connected to the partition and built into the tertiary separation chamber. The partition has a first flow channel communicating with the inner cavity of the secondary filter element, and the first flow channel is connected to the secondary air inlet. The partition has a second flow channel communicating between the inner cavity of the secondary separation chamber and the inner cavity of the tertiary filter element, and the exhaust port is connected to the tertiary separation chamber.

[0011] By adopting the above technical solution, the oil-gas mixture, after being processed by the primary separator, enters the inner cavity of the secondary filter element through the secondary inlet and the first flow channel. The secondary filter element performs a second filtration of the gas from the primary separator, effectively reducing the oil content in the helium. Subsequently, the gas filtered by the secondary filter element enters the inner cavity of the tertiary filter element through the second flow channel for a third filtration, further improving the purity of the helium. Finally, the high-purity helium after three filtration processes is discharged through the exhaust port, significantly reducing the oil content in the helium and thus effectively extending the operating time of the helium compressor.

[0012] Preferably, the partition is fixedly connected to a secondary pull rod built into the secondary separation chamber, the secondary pull rod is slidably sleeved with a secondary cover plate abutting against the end of the secondary filter element away from the partition, and the secondary pull rod is threadedly locked with a secondary anti-loosening nut abutting against the end of the secondary cover plate away from the partition.

[0013] By adopting the above technical solution, the secondary tie rod allows the secondary cover plate to slide along it, facilitating the installation and removal of the secondary filter element and improving maintenance convenience. Simultaneously, the secondary anti-loosening nut effectively prevents the secondary cover plate from falling off during use, ensuring the stable fixation of the secondary filter element.

[0014] Preferably, the partition is fixedly connected to a three-stage pull rod built into the three-stage separation chamber. The three-stage pull rod is slidably sleeved with a three-stage cover plate that abuts against the end of the three-stage filter element away from the partition. The three-stage pull rod is threadedly locked with a three-stage anti-loosening nut that abuts against the end of the three-stage cover plate away from the partition.

[0015] By adopting the above technical solution, the three-stage tie rod allows the three-stage cover plate to slide and be fitted onto it, thereby achieving effective contact with the end of the three-stage filter element away from the partition block and ensuring stable installation of the three-stage filter element. At the same time, the threaded locking engagement between the three-stage anti-loosening nut and the three-stage tie rod further fixes the position of the three-stage cover plate, preventing it from loosening or falling off during use, and improving the reliability of the three-stage filter element assembly.

[0016] Preferably, the primary separator is connected to a primary oil drain pipe that communicates with the primary gas outlet chamber.

[0017] By adopting the above technical solution, a primary oil drain pipe is connected to the primary gas outlet chamber, which can promptly discharge the separated oil.

[0018] Preferably, the secondary separator is connected to a secondary oil drain pipe that communicates with the secondary separation chamber.

[0019] By adopting the above technical solution, the oil components are effectively separated and accumulated in the secondary separation chamber. By setting a secondary oil drain pipe connected to the secondary separation chamber, the separated oil components can be discharged in a timely manner.

[0020] Preferably, the secondary separator is connected to a third-stage oil drain pipe that communicates with the third-stage separation chamber.

[0021] By adopting the above technical solution, the three-stage oil drain pipe can effectively drain the oil accumulated in the three-stage separation chamber, preventing oil accumulation from affecting the separation effect and the stability of equipment operation.

[0022] Preferably, the secondary separator is provided with a return gas pipe connected to the tertiary separation chamber, the return gas pipe is provided with a pressure reducing valve, and the return gas pipe is connected to the compressor's intake pipe.

[0023] By adopting the above technical solution, under normal conditions, the pressure reducing valve is in the closed state, and the filtered gas enters the gas-using equipment through the exhaust port. When the pressure in the three-stage separation chamber exceeds the set value, the pressure reducing valve opens, and part of the gas flows back to the compressor's intake pipe through the return pipe for reuse. This can effectively regulate the pressure in the three-stage separation chamber and ensure the stability and safety of the separation process.

[0024] In summary, this utility model has the following beneficial effects:

[0025] 1. The oil-gas mixture first enters the primary separator through the oil-gas mixture inlet pipe. After separation by the primary filter element, the primary filter element effectively intercepts most of the oil droplets. The gas then enters the secondary filter element cavity of the secondary separator through the separator connecting pipe. After secondary separation by the secondary filter element, the remaining tiny oil particles are further purified. Subsequently, the gas enters the gas-using equipment through the exhaust port. This process can significantly reduce the oil content in helium, effectively extend the trouble-free operation time of the helium compressor, and reduce the maintenance frequency.

[0026] 2. After being processed by the primary separator, the oil-gas mixture enters the secondary filter chamber through the secondary inlet and the first flow channel. The secondary filter performs a second filtration of the gas from the primary separator, effectively reducing the oil content in the helium. Subsequently, the gas filtered by the secondary filter enters the tertiary filter chamber through the second flow channel for a third filtration, further improving the helium purity. Finally, the high-purity helium, after three filtration processes, is discharged through the exhaust port, significantly reducing the oil content and thus effectively extending the operating time of the helium compressor.

[0027] 3. The filtered gas enters the gas-using equipment through the exhaust port. When the pressure in the three-stage separation chamber exceeds the set value, the pressure reducing valve opens, and part of the gas flows back to the compressor's intake pipe through the return gas pipe for reuse. This effectively regulates the pressure in the three-stage separation chamber, ensuring the stability and safety of the separation process. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an oil-gas separator for a helium compressor.

[0029] Figure 2 This is a schematic diagram of the internal structure of the primary separator;

[0030] Figure 3 This is a schematic diagram of the secondary separator;

[0031] Figure 4 This is a schematic diagram of the partition structure.

[0032] In the diagram, 1. Primary separator; 11. Primary air inlet chamber; 12. Primary air outlet chamber; 13. Oil-gas mixture inlet pipe; 14. Primary oil outlet pipe; 2. Secondary separator; 21. Partition block; 211. Secondary air inlet; 212. First flow channel; 213. Second flow channel; 214. Tertiary oil outlet pipe; 22. Upper cylinder; 221. Tertiary separation chamber; 222. Exhaust pipe; 223. Balance pressure valve; 224. Safety valve; 225. Pressure gauge; 23. Top cover. ; 231. Return air pipe; 24. Lower cylinder; 241. Secondary separation chamber; 242. Secondary oil drain pipe; 243. Oil observation window; 25. Lower cover; 3. Separator connecting pipe; 4. Primary filter element; 41. Filter baffle; 42. Wool felt; 5. Secondary filter element; 51. Secondary filter element; 52. Tertiary filter element; 53. Secondary tie rod; 54. Secondary cover plate; 55. Secondary anti-loosening nut; 56. Tertiary tie rod; 57. Tertiary cover plate; 58. Tertiary anti-loosening nut. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0034] This application discloses an oil-gas separator for a helium compressor, referring to... Figure 1 It includes a primary separator 1, a secondary separator 2, and a separator connecting pipe 3 connecting the primary separator 1 and the secondary separator 2. In this embodiment, both the primary separator 1 and the secondary separator 2 are cylindrical tanks and are arranged vertically.

[0035] Reference Figure 1 , Figure 2 The primary separator 1 contains a primary filter element 4 that divides the inner cavity into a primary inlet chamber 11 and a primary outlet chamber 12. The primary inlet chamber 11 is located above the primary outlet chamber 12. The primary filter element 4 includes two filter baffles 41 that are axially distributed along the primary separator 1 and fixedly connected to the inner wall of the primary separator 1, and a felt 42 filled between the two filter baffles 41. The filter baffles 41 are porous plates. The top wall of the primary separator 1 has an oil-gas mixture inlet pipe 13 that communicates with the primary inlet chamber 11, and the lower part of the side wall of the primary separator 1 has a primary outlet that communicates with the primary outlet chamber 12 and a primary oil drain pipe 14 that communicates with the primary outlet chamber 12. One end of the separator connecting pipe 3 passes through the primary outlet. To prevent dripping oil droplets from entering the secondary separator 2 with the airflow, the end of the separator connecting pipe 3 located in the primary outlet chamber 12 is bent downwards.

[0036] Reference Figure 3 , Figure 4 The secondary separator 2 includes a partition block 21, an upper cylinder 22 fixedly sleeved on the upper part of the partition block 21, an upper cover 23 fixedly connected to the upper end of the upper cylinder 22, a lower cylinder 24 fixedly sleeved on the lower part of the partition block 21, and a lower cover 25 fixedly connected to the lower end of the lower cylinder 24. The inner cavity of the lower cylinder 24 is a secondary separation chamber 241, and the inner cavity of the upper cylinder 22 is a tertiary separation chamber 221. The partition block 21 is provided with a secondary filter element 5, which includes a secondary filter element 51 fixedly connected to the partition block 21 and built into the secondary separation chamber 241, and a tertiary filter element 52 fixedly connected to the partition block 21 and built into the tertiary separation chamber 221. Both the secondary filter element 51 and the tertiary filter element 52 are glass fiber filter elements.

[0037] Reference Figure 1 , Figure 3 , Figure 4 The lower end face of the partition 21 is coaxially fixedly connected to a secondary pull rod 53 built into the secondary separation chamber 241. The secondary pull rod 53 is slidably sleeved with a secondary cover plate 54 that abuts against the lower end face of the secondary filter element 51. The secondary pull rod 53 is threadedly locked with a secondary anti-loosening nut 55 that abuts against the lower end face of the secondary cover plate 54. The upper end face of the partition 21 is coaxially fixedly connected to a tertiary pull rod 56 built into the tertiary separation chamber 221. The tertiary pull rod 56 is slidably sleeved with a tertiary cover plate 57 that abuts against the upper end face of the tertiary filter element 52. The tertiary pull rod 56 is threadedly locked with a tertiary anti-loosening nut 58 that abuts against the upper end face of the tertiary cover plate 57.

[0038] A secondary air inlet 211 is radially formed on the outer wall of the partition 21, and the other end of the separator connecting pipe 3 is connected to the secondary air inlet 211. A first flow channel 212 extending to the lower end face of the partition 21 is formed on the inner wall of the secondary air inlet 211, and the first flow channel 212 is connected to the inner cavity of the secondary filter element 51. The partition 21 has a second flow channel 213 connecting the inner cavity of the secondary separation chamber 241 and the tertiary filter element 52. An exhaust port connected to the tertiary separation chamber 221 is formed on the upper side wall of the upper cylinder 22, and the exhaust port is connected to an exhaust pipe 222, which is externally connected to the gas-using equipment. A return air pipe 231 connected to the tertiary separation chamber 221 is fixedly passed through the upper cover 23. The return air pipe 231 is equipped with a pressure reducing valve and is externally connected to the compressor's air intake pipe. The lower cylinder 24 is fixedly connected to the bottom of the secondary separation chamber 241 via a secondary oil drain pipe 242, and the partition block 21 is fixedly connected to the bottom of the tertiary separation chamber 221 via a tertiary oil drain pipe 214. The lower side wall of the lower cylinder 24 is provided with an oil observation window 243 for observing the internal oil level, and the side wall of the upper cylinder 22 is provided with a balancing pressure valve 223, a safety valve 224, and a pressure gauge 225.

[0039] The implementation principle of an oil-gas separator for a helium compressor according to an embodiment of this application is as follows: The oil-gas mixture first enters the primary outlet chamber 12 through the oil-gas mixture inlet pipe 13. After the primary filter element 4 filters for the first time, most of the oil-gas mixture and small particles are separated. The gas enters the inner cavity of the secondary filter element 51 through the separator connecting pipe 3, the secondary inlet 211 and the first flow channel 212. The secondary filter element 51 filters the gas for the second time. Subsequently, the gas filtered by the secondary filter element 51 enters the inner cavity of the tertiary filter element 52 through the second flow channel 213 for the third filtration, effectively reducing the oil content in the helium. The high-purity helium after three filtration processes is discharged into the gas-using equipment through the exhaust port. When the pressure in the tertiary separation chamber 221 exceeds the set value, the pressure reducing valve opens, and part of the gas flows back to the compressor's inlet pipe through the return pipe 231 for reuse, which can effectively regulate the pressure in the tertiary separation chamber 221.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An oil and gas separator for a helium compressor, characterized by: The system includes a primary separator (1), a secondary separator (2), and a separator connecting pipe (3). The primary separator (1) has a primary filter element (4) that divides the inner cavity into a primary air inlet chamber (11) and a primary air outlet chamber (12). The primary separator (1) has an oil-gas mixture inlet pipe (13) connected to the primary air inlet chamber (11) and a primary air outlet connected to the primary air outlet chamber (12). The secondary separator (2) has a secondary filter element (5) built in. The secondary separator (2) has a secondary air inlet (211) connected to the inner cavity of the secondary filter element (5) and an exhaust port for the gas filtered by the secondary filter element (5) to be discharged. One end of the separator connecting pipe (3) is connected to the primary air outlet, and the other end of the separator connecting pipe (3) is connected to the secondary air inlet (211). 11); The secondary separator (2) has a partition (21) that divides the inner cavity into a secondary separation chamber (241) and a tertiary separation chamber (221). The secondary filter element (5) includes a secondary filter element (51) that is fixedly connected to the partition (21) and built into the secondary separation chamber (241) and a tertiary filter element (52) that is fixedly connected to the partition (21) and built into the tertiary separation chamber (221). The partition (21) has a first flow channel (212) that communicates with the inner cavity of the secondary filter element (51). The first flow channel (212) communicates with the secondary air inlet (211). The partition (21) has a second flow channel (213) that communicates between the inner cavity of the secondary separation chamber (241) and the inner cavity of the tertiary filter element (52). The exhaust port communicates with the tertiary separation chamber (221).

2. A gas-oil separator for helium compressors according to claim 1, characterized in that: The primary filter element (4) includes two filter baffles (41) that are axially distributed along the primary separator (1) and fixedly connected to the inner wall of the primary separator (1) and wool felt (42) filled between the two filter baffles (41). The filter baffles (41) are porous plates.

3. The oil-gas separator for a helium compressor according to claim 1, characterized in that: The partition (21) is fixedly connected to a secondary pull rod (53) built into the secondary separation chamber (241). The secondary pull rod (53) is slidably sleeved with a secondary cover plate (54) that abuts against the end of the secondary filter element (51) away from the partition (21). The secondary pull rod (53) is threadedly locked with a secondary anti-loosening nut (55) that abuts against the end of the secondary cover plate (54) away from the partition (21).

4. The oil-gas separator for a helium compressor according to claim 1, characterized in that: The partition (21) is fixedly connected to a three-stage pull rod (56) built into the three-stage separation chamber (221). The three-stage pull rod (56) is slidably fitted with a three-stage cover plate (57) that abuts against the end of the three-stage filter element (52) away from the partition (21). The three-stage pull rod (56) is threadedly fitted with a three-stage anti-loosening nut (58) that abuts against the end of the three-stage cover plate (57) away from the partition (21).

5. An oil-gas separator for a helium compressor according to claim 1, characterized in that: The primary separator (1) is connected to a primary oil drain pipe (14) that communicates with the primary gas outlet chamber (12).

6. The oil-gas separator for a helium compressor according to claim 1, characterized in that: The secondary separator (2) is connected to a secondary oil drain pipe (242) that communicates with the secondary separation chamber (241).

7. The oil-gas separator for a helium compressor according to claim 1, characterized in that: The secondary separator (2) is connected to a tertiary oil drain pipe (214) that communicates with the tertiary separation chamber (221).

8. An oil-gas separator for a helium compressor according to claim 1, characterized in that: The secondary separator (2) is provided with a return pipe (231) connected to the tertiary separation chamber (221), and the return pipe (231) is provided with a pressure reducing valve.

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