Refrigerating gas filtering device of helium compressor

Abstract

The utility model discloses a helium compressor refrigeration gas filtering device, which relates to the technical field of gas filtering devices, and comprises a shell and a filter element positioned in the shell, the filter element is sequentially provided with a first filtering channel, a second filtering channel and a third filtering channel from inside to outside, and the first filtering channel, the second filtering channel and the third filtering channel are coaxially arranged. The bottom end of the first filtering channel protrudes out of the plane where the bottom faces of the second filtering channel and the third filtering channel are located, a first through hole is formed in the side wall of the bottom end of the first filtering channel, and a second through hole is formed between the top end of the first filtering channel and the top end of the second filtering channel. A third through hole is formed between the bottom end of the second channel and the bottom end of the third channel, a sealing cover is arranged at the top end of the filter element, and a fourth through hole located in the top of the third filter channel is formed in the sealing cover. According to the helium compressor refrigeration gas filtering device adopting the structure, the gas filtering effect is improved by increasing the filtering stroke of the filter element.

Description

Technical Field

[0001] The utility model relates to the technical field of gas filtering devices, in particular to a helium compressor refrigeration gas filtering device. Background Art

[0002] Helium is a rare gas, a colorless, odorless, inert gas, chemically inactive, and difficult to react with other substances under normal conditions. Helium plays an indispensable role in many aspects, such as magnetic resonance imaging, where helium is often used. However, there are still some unavoidable problems in helium filtration.

[0003] The Chinese patent with application number CN202121782445.1 provides a refrigeration helium filter device, including a filter body, an air intake device, an inspection cover, a fixing device, a filter box and a filter bag, one side of the filter body is connected to the air intake device by welding, the top of the filter body is movably connected to the inspection cover, the outer surface of the filter body is provided with a fixing device, the filter body is provided with a filter box, the filter bag is installed in the filter box, the filter body includes an inspection port, an air outlet and a fixing ring, the top of the filter body is provided with an inspection port, and the top of the filter body is provided with an air outlet. Although this refrigeration helium filter device solves the problem that there is usually inconvenience in replacing the filter element when replacing the existing helium filter device, it is simple to operate, greatly shortens the replacement time, avoids the difficulty in replacing the filter element and shortening the use time of the device, and when the inspection cover is closed, it can be in close contact with the leak-proof ring to avoid helium leakage. However, it has the following problems when used: due to the limitation of the overall structure of the filter device, the gas filtering stroke is short, resulting in poor filtering effect. Utility Model Content

[0004] The utility model aims to provide a helium compressor refrigeration gas filtering device, which improves the filtering effect on the gas by increasing the filtering stroke of the filter element.

[0005] To achieve the above-mentioned purpose, the utility model provides a helium compressor refrigeration gas filtering device, comprising a shell and a filter element located in the shell, the filter element is provided with a first filter channel, a second filter channel and a third filter channel which are coaxially arranged from the inside to the outside, the bottom end of the first filter channel protrudes from the plane where the bottom surfaces of the second filter channel and the third filter channel are located, a first through hole is provided on the bottom end side wall of the first filter channel, a second through hole is provided between the top end of the first filter channel and the top end of the second filter channel, a third through hole is provided between the bottom end of the second channel and the bottom end of the third channel, a sealing cover is provided at the top end of the filter element which is sealedly connected to the top end openings of the first filter channel, the second filter channel and the third filter channel, and the sealing cover is provided with a fourth through hole located at the top of the third filter channel.

[0006] Preferably, the first filter channel, the second filter channel and the third filter channel are all provided with high-density thin copper mesh sheets, activated carbon and filter cotton that are repeatedly stacked.

[0007] Preferably, a pull ring is provided on the sealing cover.

[0008] Preferably, an air outlet pipe is provided at the top of the side wall of the shell, and an air inlet pipe is provided at the bottom of the side wall of the shell.

[0009] Preferably, an air inlet cavity is formed between the bottom end of the shell and the filter element, the air inlet cavity is connected to the air inlet pipe, and an air outlet cavity is formed between the top end of the shell and the filter element, the air outlet cavity is connected to the air outlet pipe.

[0010] Preferably, the bottom end of the shell is provided with a lower protrusion, the protrusion is provided with a mounting hole, the top end of the shell is provided with an upper protrusion, the upper protrusion is connected to an inspection cover by bolts, and the bottom surface of the inspection cover is provided with a sealing ring arranged opposite to the top end of the side wall of the shell.

[0011] Therefore, the utility model adopts the helium compressor refrigeration gas filtering device of the above structure, which can improve the filtering effect of the gas by increasing the filtering stroke of the filter element.

[0012] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an embodiment of a helium compressor refrigeration gas filtering device of the utility model;

[0014] Figure 2 It is a cross-sectional view of an embodiment of a helium compressor refrigeration gas filtering device of the utility model.

[0015] Reference numerals

[0016] 1. Shell; 2. Filter element; 3. First filter channel; 4. Second filter channel; 5. Third filter channel; 6. First through hole; 7. Second through hole; 8. Third through hole; 9. Sealing cover; 10. Fourth through hole; 11. Pull ring; 12. Air outlet pipe; 13. Air inlet pipe; 14. Air inlet cavity; 15. Air outlet cavity; 16. Lower protrusion; 17. Upper protrusion; 18. Inspection cover. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0018] Example

[0019] like Figure 1-2 As shown, a helium compressor refrigeration gas filter device comprises a housing 1 and a filter element 2 located in the housing 1, and a rubber sealing pad adapted to the inner wall of the housing 1 can be arranged on the outer wall of the filter element 2. The filter element 2 is provided with a first filter channel 3, a second filter channel 4 and a third filter channel 5 coaxially arranged from the inside to the outside, and the bottom end of the first filter channel 3 protrudes from the plane where the bottom surfaces of the second filter channel 4 and the third filter channel 5 are located. The first filter channel 3, the second filter channel 4 and the third filter channel 5 are all provided with a thin copper mesh, activated carbon and filter cotton repeatedly stacked, and the thin copper mesh is a high-density thin copper mesh. A first through hole 6 is provided on the side wall of the bottom end of the first filter channel 3, a second through hole 7 is provided between the top end of the first filter channel 3 and the top end of the second filter channel 4, and a third through hole 8 is provided between the bottom end of the second channel and the bottom end of the third channel. A sealing cover 9 is provided at the top end of the filter element 2, which is sealed and connected to the top openings of the first filter channel 3, the second filter channel 4 and the third filter channel 5, and a fourth through hole 10 located at the top of the third filter channel 5 is provided on the sealing cover 9. A pull ring 11 is provided on the sealing cover 9 , and the pull ring 11 facilitates the sealing cover 9 to be inserted into the filter element 2 or to be removed from the filter element 2 .

[0020] An air outlet pipe 12 is provided at the top of the side wall of the shell 1, and an air inlet pipe 13 is provided at the bottom of the side wall of the shell 1. An air inlet chamber 14 is formed between the bottom end of the shell 1 and the filter element 2, and the air inlet chamber 14 is connected to the air inlet pipe 13. An air outlet chamber 15 is formed between the top end of the shell 1 and the filter element 2, and the air outlet chamber 15 is connected to the air outlet pipe 12. A lower flange 16 is provided at the bottom end of the shell 1, and a mounting hole is provided on the flange, which facilitates the installation and fixation of the filter device as a whole. An upper flange 17 is provided at the top end of the shell 1, and the upper flange 17 is connected to the inspection cover 18 by bolts, and the bottom surface of the inspection cover 18 is provided with a sealing ring arranged opposite to the top end of the side wall of the shell 1.

[0021] When in use, the stroke of the helium compressor refrigeration gas is inlet pipe 13-inlet cavity 14-first through hole 6-first filter channel 3-second through hole 7-second filter channel 4-third through hole 8-third filter channel 5-fourth through hole 10-air outlet cavity 15-air outlet pipe 12, wherein the coordinated use of the first filter channel 3, the second filter channel 4 and the third filter channel 5 increases the effective filtering stroke of the gas and greatly improves the filtering effect. The pull ring 11 facilitates the disassembly of the sealing cover 9, and then facilitates the replacement of the filter material in the filter element 2, thereby improving the efficiency of the filter element 2 overhaul.

[0022] Therefore, the utility model adopts the helium compressor refrigeration gas filtering device of the above structure to improve the filtering effect of the gas by increasing the filtering stroke of the filter element.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A helium compressor refrigeration gas filtering device, characterized in that: The invention comprises a shell and a filter element inside the shell, wherein the filter element is provided with a first filter channel, a second filter channel and a third filter channel which are coaxially arranged from the inside to the outside, the bottom end of the first filter channel protrudes from the plane where the bottom surfaces of the second filter channel and the third filter channel are located, a first through hole is provided on the side wall of the bottom end of the first filter channel, a second through hole is provided between the top end of the first filter channel and the top end of the second filter channel, a third through hole is provided between the bottom end of the second channel and the bottom end of the third channel, a sealing cover which is sealingly connected to the top openings of the first filter channel, the second filter channel and the third filter channel is provided on the top end of the filter element, and a fourth through hole located at the top of the third filter channel is provided on the sealing cover.

2. The helium compressor refrigeration gas filtering device according to claim 1, characterized in that: The first filter channel, the second filter channel and the third filter channel are all provided with high-density thin copper mesh sheets, activated carbon and filter cotton which are repeatedly stacked.

3. The helium compressor refrigeration gas filtering device according to claim 2, characterized in that: The sealing cover is provided with a pull ring.

4. The helium compressor refrigeration gas filtering device according to claim 3, characterized in that: An air outlet pipe is arranged at the top of the side wall of the shell, and an air inlet pipe is arranged at the bottom of the side wall of the shell.

5. The helium compressor refrigeration gas filtering device according to claim 4, characterized in that: An air inlet cavity is formed between the bottom end of the shell and the filter element, and the air inlet cavity is connected to the air inlet pipe. An air outlet cavity is formed between the top end of the shell and the filter element, and the air outlet cavity is connected to the air outlet pipe.

6. The helium compressor refrigeration gas filtering device according to claim 5, characterized in that: The bottom end of the shell is provided with a lower protrusion, the protrusion is provided with a mounting hole, the top end of the shell is provided with an upper protrusion, the upper protrusion is connected to an inspection cover by bolts, and the bottom surface of the inspection cover is provided with a sealing ring arranged opposite to the top end of the side wall of the shell.

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