Air supply filtering device for liquid nitrogen production

Abstract

The utility model belongs to the technical field of liquid nitrogen production, and particularly relates to an air supply filtering device for liquid nitrogen production, which comprises a device body, an air inlet pipe arranged on one side of the device body, an air outlet pipe arranged at the top of the device body, a first filtering tank and a second filtering tank arranged on one side of the device body, and a filtering box arranged in the second filtering tank. A sealing cover is arranged at the top of the filtering box, a connecting mechanism is arranged on the sealing cover, a first cavity and a second cavity are formed between the inner wall and the outer wall of the device body, and a containing groove is formed in the top of the filtering box. According to the air supply filtering device for liquid nitrogen production, the first filtering groove, the second filtering groove, the filtering box, the sealing cover, the connecting mechanism, the circulating hole, the sealing piece and the handle are arranged, so that the replacement convenience of a filtering material of the air supply filtering device for liquid nitrogen production can be further improved; and the cleaning convenience of the filtering mechanism of the air supply filtering device for liquid nitrogen production can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid nitrogen production, in particular to an air supply filtering device for liquid nitrogen production. Background Art

[0002] Liquid nitrogen refers to the liquid obtained by inert, colorless, odorless, non-corrosive, and non-flammable nitrogen gas under extremely low temperature. In the process of liquid nitrogen production, the supply air of liquid nitrogen needs to be filtered to improve the purity of the liquid nitrogen after production. Therefore, an air supply filter device is needed to filter the supply air for liquid nitrogen production.

[0003] The prior art has the following problems:

[0004] 1. The filter mechanism of the prior art air supply filter device for liquid nitrogen production is usually fixedly installed in the device body. When the filter material in the filter mechanism needs to be replaced later, it is often inconvenient to replace the filter material because the filter mechanism is difficult to disassemble and assemble. The convenience of replacing the filter material of the air supply filter device for liquid nitrogen production can be further improved;

[0005] 2. The filter mechanism of the prior art air supply filter device for liquid nitrogen production is usually fixedly installed in the device body. When the filter mechanism needs to be cleaned later, it is difficult to disassemble and assemble the filter mechanism, which is often inconvenient to clean. The cleaning convenience of the filter mechanism of the air supply filter device for liquid nitrogen production can be further improved. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides an air supply filter device for liquid nitrogen production, which solves the problems that the filter mechanism of the existing air supply filter device for liquid nitrogen production is usually fixedly installed in the device body, and when the filter material in the filter mechanism needs to be replaced later, it is often inconvenient to replace the filter material because the filter mechanism is difficult to disassemble and assemble, and the convenience of replacing the filter material of the air supply filter device for liquid nitrogen production can be further improved, and the filter mechanism of the air supply filter device for liquid nitrogen production is usually fixedly installed in the device body, and when the filter mechanism needs to be cleaned later, it is often inconvenient to clean because the filter mechanism is difficult to disassemble and assemble, and the convenience of cleaning the filter mechanism of the air supply filter device for liquid nitrogen production can be further improved.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air supply and filtering device for liquid nitrogen production, comprising a device body, an air inlet pipe is arranged on one side of the device body, an air outlet pipe is arranged on the top of the device body, a first filter slot and a second filter slot are provided on one side of the device body, a filter box is arranged in the second filter slot, a sealing cover is arranged on the top of the filter box, a connecting mechanism is arranged on the sealing cover, a first cavity and a second cavity are provided between the inner wall and the outer wall of the device body, a placement slot is provided on the top of the filter box, a flow hole is provided between the first filter slot and the second filter slot, a first exhaust fan is provided on one side of the device body, a first connecting hose is provided at one end of the first exhaust fan, a second exhaust fan is provided above the device body, a second connecting hose is provided at one end of the second exhaust fan, a sealing member is provided on one side of the device body, a handle is provided on one side of the filter box, an opening is provided on the sealing member, a silicone member is provided in the opening, and a rubber ring is provided on the sealing member;

[0008] The connecting mechanism is specifically composed of a connecting rod, a connecting groove, a first magnet block and a second magnet block. A connecting rod is arranged at the bottom of the sealing cover, a connecting groove is opened at the top of the filter box, a first magnet block is arranged at the bottom of the connecting rod, and a second magnet block is arranged at the bottom of the connecting groove.

[0009] As a preferred technical solution of the utility model, the device body comprises, from top to bottom, a second cavity, a second filter tank, a first filter tank, and a first cavity. One end of the air inlet pipe is fixed and connected to one side of the inner wall of the first cavity, and one end of the air outlet pipe is fixed and connected to the top of the inner wall of the second cavity.

[0010] As a preferred technical solution of the utility model, the first exhaust fan is fixedly installed on one side of the device body through a bracket and the air outlet end of the first exhaust fan corresponds to the air inlet pipe, both ends of the first exhaust fan are fixed and connected with a first connecting hose, the first connecting hose at the air outlet end of the first exhaust fan is fixed and connected to the air inlet pipe, and the first connecting hose at the air intake end of the first exhaust fan is fixed and connected to the liquid nitrogen supply air storage device.

[0011] As a preferred technical solution of the utility model, the second exhaust fan is fixedly installed above the device body through a bracket and the suction end of the second exhaust fan corresponds to the outlet pipe, both ends of the second exhaust fan are fixed and connected with a second connecting hose, the second connecting hose at the suction end of the second exhaust fan is fixed and connected to the outlet pipe, and the second connecting hose at the outlet end of the second exhaust fan is fixed and connected to the liquid nitrogen production device.

[0012] As a preferred technical solution of the utility model, the sealing cover is in a "convex" shape as a whole, the top of the placement groove is matched with the protruding end of the sealing cover, the protruding end of the sealing cover is clamped on the top of the placement groove, the connecting rod is fixedly installed on the bottom of the non-protruding end of the sealing cover, the connecting groove is matched with the connecting rod, and the connecting rod is clamped in the connecting groove.

[0013] As a preferred technical solution of the utility model, the first magnet block is embedded in the bottom of the connecting rod, the second magnet block is embedded in the bottom of the connecting groove, the first magnet block and the second magnet block are magnetically attracted to each other, two sets of connecting mechanisms are arranged on the sealing cover, and the handle is fixedly installed on one side of the filter box.

[0014] As a preferred technical solution of the utility model, a plurality of groups of flow holes are provided between the second cavity and the second filter tank, between the second filter tank and the first filter tank, between the first filter tank and the first cavity, on the sealing cover, and at the bottom of the filter box. Filter boxes are clamped in the second filter tank and the first filter tank, and the specifications and structures of the two groups of filter boxes are the same. A plurality of groups of activated carbon blocks are placed in the filter box on the first filter tank, and a plurality of groups of molecular sieve blocks are placed in the filter box on the second filter tank. The flow holes on the sealing cover and the filter box are slightly smaller than the size of the activated carbon and molecular sieve blocks.

[0015] As a preferred technical solution of the utility model, the opening is adapted to the handle, the silicone member is fixedly mounted on the inner wall of the opening and is specifically soft silicone, the seal is in a "convex" shape as a whole and there are two groups of seals, the protruding ends of the two groups of seals are both sleeved and fixed with rubber rings, the protruding ends of the two groups of seals are respectively clamped in the first filter tank and the second filter tank and the non-protruding ends of the two groups of seals are fixed by screws.

[0016] Compared with the prior art, the utility model provides an air supply and filtering device for liquid nitrogen production, which has the following beneficial effects:

[0017] 1. The air supply filter device for liquid nitrogen production is provided with a first filter tank, a second filter tank, a filter box, a sealing cover, a connecting mechanism, a flow hole, a sealing member, and a handle. When the filter material in the filter mechanism needs to be replaced, the screws used to fix the corresponding sealing member are removed, the sealing member is moved outward to separate the sealing member from the device body, the filter box is taken out from the corresponding first filter tank or the second filter tank, and the sealing cover is moved upward to separate the connecting rod from the connecting tank. The sealing cover can be disassembled, and the activated carbon block or molecular sieve block in the filter box can be replaced at this time. When the filter box needs to be installed later, the above operation is performed in reverse, and the replacement of the filter material is more convenient. This structure can further improve the convenience of replacing the filter material of the air supply filter device for liquid nitrogen production;

[0018] 2. The air supply filter device for liquid nitrogen production, through the first filter tank, the second filter tank, the filter box, the sealing cover, the connecting mechanism, the flow hole, the sealing member, and the handle, when the filter mechanism needs to be cleaned, the filter mechanism can be conveniently disassembled and assembled, so the cleaning of the filter mechanism can be facilitated, which can further improve the cleaning convenience of the filter mechanism of the air supply filter device for liquid nitrogen production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall partial cross-sectional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the specific structure of the connection mechanism of the utility model;

[0021] Figure 3 This is a schematic diagram of the overall direct-view structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the direct structure of the filter box of the utility model;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the sealing cover of the utility model;

[0024] Figure 6 This is a schematic diagram of the side view structure of the sealing member of the utility model.

[0025] In the figure: 1. device body; 2. air inlet pipe; 3. air outlet pipe; 4. first filter tank; 5. second filter tank; 6. filter box; 7. sealing cover; 8. connecting mechanism; 801. connecting rod; 802. connecting slot; 803. first magnet block; 804. second magnet block; 9. first cavity; 10. second cavity; 11. placement slot; 12. circulation hole; 13. first exhaust fan; 14. first connecting hose; 15. second exhaust fan; 16. second connecting hose; 17. sealing member; 18. handle; 19. opening; 20. silicone member; 21. rubber ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-6In the present embodiment: an air supply and filtering device for liquid nitrogen production comprises a device body 1, an air inlet pipe 2 is arranged on one side of the device body 1, the air inlet pipe 2 can facilitate the input of air in the liquid nitrogen supply air storage device, an air outlet pipe 3 is arranged on the top of the device body 1, the air outlet pipe 3 can facilitate the output of the filtered liquid nitrogen supply air, a first filter tank 4 and a second filter tank 5 are arranged on one side of the device body 1, a filter box 6 is arranged in the second filter tank 5, a sealing cover 7 is arranged on the top of the filter box 6, a connecting mechanism 8 is arranged on the sealing cover 7, a first cavity 9 and a second cavity 10 are arranged between the inner wall and the outer wall of the device body 1, a placement groove 11 is arranged on the top of the filter box 6, and a first filter tank 4 and a second filter tank 5 are arranged on the top of the filter box 6. A flow hole 12 is provided between the filter tank 4 and the second filter tank 5, a first exhaust fan 13 is provided on one side of the device body 1, the first exhaust fan 13 can transport the liquid nitrogen supply air, a first connecting hose 14 is provided at one end of the first exhaust fan 13, a second exhaust fan 15 is provided above the device body 1, a second connecting hose 16 is provided at one end of the second exhaust fan 15, a sealing member 17 is provided on one side of the device body 1, a handle 18 is provided on one side of the filter box 6, an opening 19 is provided on the sealing member 17, a silicone member 20 is provided in the opening 19, a rubber ring 21 is provided on the sealing member 17, and the rubber ring 21 can improve the sealing performance of the connection between the sealing member 17 and the device body 1;

[0028] The connecting mechanism 8 is specifically composed of a connecting rod 801, a connecting groove 802, a first magnet block 803 and a second magnet block 804. A connecting rod 801 is arranged at the bottom of the sealing cover 7, and a connecting groove 802 is opened at the top of the filter box 6. The connecting rod 801 combined with the connecting groove 802 can facilitate the initial fixation between the sealing cover 7 and the filter box 6. A first magnet block 803 is arranged at the bottom of the connecting rod 801, and a second magnet block 804 is arranged at the bottom of the connecting groove 802. The first magnet block 803 combined with the second magnet block 804 can prevent the connecting rod 801 from arbitrarily detaching from the connecting groove 802.

[0029] In this embodiment, the device body 1 includes the second cavity 10, the second filter tank 5, the first filter tank 4, and the first cavity 9 from top to bottom. One end of the air inlet pipe 2 is fixed and connected to one side of the inner wall of the first cavity 9, and one end of the air outlet pipe 3 is fixed and connected to the top of the inner wall of the second cavity 10. The first cavity 9 and the second cavity 10 can facilitate the gathering of air; the first exhaust fan 13 is fixedly installed on one side of the device body 1 through a bracket, and the air outlet end of the first exhaust fan 13 corresponds to the air inlet pipe 2. Both ends of the first exhaust fan 13 are fixed and connected with a first connecting hose 14. The first connecting hose 14 at the air outlet end of the first exhaust fan 13 is fixed and connected to the air inlet pipe 2, and the first connecting hose 14 at the air intake end of the first exhaust fan 13 is connected to the liquid nitrogen supply The air storage device is fixed and connected, and the first connecting hose 14 can facilitate the connection between the first exhaust fan 13 and the air inlet pipe 2 and the liquid nitrogen supply to the air storage device; the second exhaust fan 15 is fixedly installed on the top of the device body 1 through a bracket, and the air intake end of the second exhaust fan 15 corresponds to the air outlet pipe 3. Both ends of the second exhaust fan 15 are fixed and connected with a second connecting hose 16. The second connecting hose 16 at the air intake end of the second exhaust fan 15 is fixed and connected to the air outlet pipe 3. The second connecting hose 16 at the air outlet end of the second exhaust fan 15 is fixed and connected to the liquid nitrogen production device. The second connecting hose 16 can facilitate the connection between the second exhaust fan 15 and the air outlet pipe 3 and the liquid nitrogen production device; the sealing cover 7 is in a "convex" shape as a whole, and the top of the placement groove 11 is The top of the sealing cover 7 is adapted to the protruding end of the sealing cover 7, and the protruding end of the sealing cover 7 is clamped on the top of the placement groove 11. The connecting rod 801 is fixedly installed at the bottom of the non-protruding end of the sealing cover 7. The connecting groove 802 is adapted to the connecting rod 801, and the connecting rod 801 is clamped in the connecting groove 802. The sealing cover 7 can seal the placement groove 11 to prevent the activated carbon block or molecular sieve block in the placement groove 11 from escaping from the placement groove 11; the first magnet block 803 is embedded in the bottom of the connecting rod 801, and the second magnet block 804 is embedded in the bottom of the connecting groove 802. The first magnet block 803 and the second magnet block 804 are magnetically attracted to each other. A total of two sets of connecting mechanisms 8 are arranged on the sealing cover 7. The handle 18 is fixedly installed on one side of the filter box 6, and the handle 18 can be conveniently The filter box 6 is convenient to hold; a plurality of flow holes 12 are provided between the second cavity 10 and the second filter tank 5, between the second filter tank 5 and the first filter tank 4, between the first filter tank 4 and the first cavity 9, on the sealing cover 7, and at the bottom of the filter box 6. The filter boxes 6 are clamped in the second filter tank 5 and the first filter tank 4, and the specifications and structures of the two groups of filter boxes 6 are the same. A plurality of activated carbon blocks are placed in the filter box 6 on the first filter tank 4, and a plurality of molecular sieve blocks are placed in the filter box 6 on the second filter tank 5. The flow holes 12 on the sealing cover 7 and the filter box 6 are slightly smaller than the size of the activated carbon and the molecular sieve blocks. The flow holes 12 can facilitate the air circulation between the first cavity 9, the first filter tank 4, the second filter tank 5, and the second cavity 10;The opening 19 is adapted to the handle 18, and the silicone member 20 is fixedly installed on the inner wall of the opening 19 and is specifically soft silicone. The seal 17 is in a "convex" shape as a whole and there are two groups of seals 17. The protruding ends of the two groups of seals 17 are sleeved and fixed with rubber rings 21. The protruding ends of the two groups of seals 17 are respectively clamped in the first filter tank 4 and the second filter tank 5, and the non-protruding ends of the two groups of seals 17 are fixed by screws. The silicone member 20 can improve the sealing performance of the connection between the handle 18 and the opening 19. ;

[0030] The working principle and use process of the utility model: the operator first checks whether the relevant components are installed in the correct position. The first exhaust fan 13 and the second exhaust fan 15 only need to achieve the effect of exhausting and conveying airflow, and there is no restriction on their specific models. At this time, the device body 1 can be used normally, and the supply air in the liquid nitrogen supply air storage device will enter the first cavity 9 through the air inlet pipe 2, and the supply air will eventually be discharged through the air outlet pipe 3. During this period, the activated carbon blocks and molecular sieve blocks in the two groups of filter boxes 6 can filter the supply air. The second exhaust fan 15 can increase the second connecting hose 16 to transport the filtered liquid nitrogen supply air to the liquid nitrogen production device to facilitate the production and use of liquid nitrogen. When the filter material (activated carbon block or molecular sieve block) in the filter mechanism (filter box 6) needs to be replaced, the screws used to fix the corresponding sealing member 17 are removed by a screwdriver, and the sealing member 17 is moved outward to separate the sealing member 17 from the device body 1, and the filter box 6 is removed from The first filter tank 4 or the second filter tank 5 is taken out, and the sealing cover 7 is moved upward to make the connecting rod 801 disengage from the connecting groove 802, so that the disassembly of the sealing cover 7 can be completed. At this time, the activated carbon block or the molecular sieve block in the filter box 6 can be replaced. When the filter box 6 needs to be installed later, the above operation is performed in reverse, and due to the magnetic attraction between the first magnet block 803 and the corresponding second magnet block 804, the connecting rod 801 will not be separated from the connecting groove 802 at will, and the fixing between the sealing cover 7 and the filter box 6 can be completed. When the filter mechanism (filter box 6) needs to be cleaned later, the disassembly and assembly operation of the filter box 6 is the same as above, and the disassembly and assembly of the filter mechanism and the replacement of the filter material in the filter mechanism are relatively convenient, which can facilitate the replacement of the filter material and the cleaning of the filter mechanism. This structure can further improve the convenience of replacing the filter material of the air supply filter device for liquid nitrogen production, and can further improve the convenience of cleaning the filter mechanism of the air supply filter device for liquid nitrogen production.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An air supply and filtering device for liquid nitrogen production, comprising a device body (1), an air inlet pipe (2) is arranged on one side of the device body (1), and an air outlet pipe (3) is arranged on the top of the device body (1), characterized in that: A first filter groove (4) and a second filter groove (5) are provided on one side of the device body (1); a filter box (6) is provided in the second filter groove (5); a sealing cover (7) is provided on the top of the filter box (6); a connecting mechanism (8) is provided on the sealing cover (7); a first cavity (9) and a second cavity (10) are provided between the inner wall and the outer wall of the device body (1); a placement groove (11) is provided on the top of the filter box (6); a flow hole (12) is provided between the first filter groove (4) and the second filter groove (5); and a first filter groove (4) and a second filter groove (5) are provided on one side of the device body (1). A first exhaust fan (13) is provided, a first connecting hose (14) is provided at one end of the first exhaust fan (13), a second exhaust fan (15) is provided above the device body (1), a second connecting hose (16) is provided at one end of the second exhaust fan (15), a sealing member (17) is provided on one side of the device body (1), a handle (18) is provided on one side of the filter box (6), an opening (19) is provided on the sealing member (17), a silicone member (20) is provided in the opening (19), and a rubber ring (21) is provided on the sealing member (17); The connecting mechanism (8) is specifically composed of a connecting rod (801), a connecting groove (802), a first magnet block (803) and a second magnet block (804); the bottom of the sealing cover (7) is provided with a connecting rod (801); the top of the filter box (6) is provided with a connecting groove (802); the bottom of the connecting rod (801) is provided with a first magnet block (803); and the bottom of the connecting groove (802) is provided with a second magnet block (804).

2. The air supply and filtering device for liquid nitrogen production according to claim 1, characterized in that: The device body (1) comprises, from top to bottom, a second cavity (10), a second filter tank (5), a first filter tank (4), and a first cavity (9); one end of the air inlet pipe (2) is fixed to and communicated with one side of the inner wall of the first cavity (9); and one end of the air outlet pipe (3) is fixed to and communicated with the top of the inner wall of the second cavity (10).

3. The air supply and filtering device for liquid nitrogen production according to claim 1, characterized in that: The first exhaust fan (13) is fixedly mounted on one side of the device body (1) through a bracket, and the air outlet end of the first exhaust fan (13) corresponds to the air inlet pipe (2). Both ends of the first exhaust fan (13) are fixed and connected with a first connecting hose (14). The first connecting hose (14) at the air outlet end of the first exhaust fan (13) is fixed and connected to the air inlet pipe (2), and the first connecting hose (14) at the air intake end of the first exhaust fan (13) is fixed and connected to the liquid nitrogen supply air storage device.

4. The air supply and filtering device for liquid nitrogen production according to claim 1, characterized in that: The second exhaust fan (15) is fixedly installed above the device body (1) through a bracket, and the air intake end of the second exhaust fan (15) corresponds to the air outlet pipe (3). Both ends of the second exhaust fan (15) are fixed and connected with a second connecting hose (16). The second connecting hose (16) at the air intake end of the second exhaust fan (15) is fixed and connected to the air outlet pipe (3), and the second connecting hose (16) at the air outlet end of the second exhaust fan (15) is fixed and connected to the liquid nitrogen production device.

5. The air supply and filtering device for liquid nitrogen production according to claim 1, characterized in that: The sealing cover (7) is in a "convex" shape as a whole; the top of the placement groove (11) is matched with the protruding end of the sealing cover (7); the protruding end of the sealing cover (7) is clamped on the top of the placement groove (11); the connecting rod (801) is fixedly installed on the bottom of the non-protruding end of the sealing cover (7); the connecting groove (802) is matched with the connecting rod (801); and the connecting rod (801) is clamped in the connecting groove (802).

6. The air supply and filtering device for liquid nitrogen production according to claim 1, characterized in that: The first magnet block (803) is embedded in the bottom of the connecting rod (801), and the second magnet block (804) is embedded in the bottom of the connecting groove (802). The first magnet block (803) and the second magnet block (804) are magnetically attracted to each other. Two sets of connecting mechanisms (8) are provided on the sealing cover (7), and the handle (18) is fixedly mounted on one side of the filter box (6).

7. The air supply and filtering device for liquid nitrogen production according to claim 1, characterized in that: A plurality of groups of flow holes (12) are provided between the second cavity (10) and the second filter tank (5), between the second filter tank (5) and the first filter tank (4), between the first filter tank (4) and the first cavity (9), on the sealing cover (7), and at the bottom of the filter box (6); the second filter tank (5) and the first filter tank (4) are both clamped with filter boxes (6), and the two groups of filter boxes (6) have the same specifications and structures; a plurality of groups of activated carbon blocks are placed in the filter box (6) on the first filter tank (4), and a plurality of groups of molecular sieve blocks are placed in the filter box (6) on the second filter tank (5); and the flow holes (12) on the sealing cover (7) and the filter box (6) are slightly smaller than the size of the activated carbon and molecular sieve blocks.

8. The air supply and filtering device for liquid nitrogen production according to claim 1, characterized in that: The opening (19) is matched with the handle (18); the silicone member (20) is fixedly mounted on the inner wall of the opening (19) and is specifically soft silicone; the sealing member (17) is in a "convex" shape as a whole and there are two groups of sealing members (17); the protruding ends of the two groups of sealing members (17) are sleeved with and fixed with rubber rings (21); the protruding ends of the two groups of sealing members (17) are respectively clamped in the first filter tank (4) and the second filter tank (5) and the non-protruding ends of the two groups of sealing members (17) are fixed by screws.

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