Self-cleaning air filter of air separation device

Abstract

The utility model discloses a self-cleaning air filter of an air separation device, which relates to the technical field of air separation and comprises a re-filtering tank, a cleaning and filtering unit and a gas re-filtering unit, the self-cleaning filter unit comprises a thin-wall filter cartridge, a linkage shaft, a fixed connecting rod, a bearing, a wind impeller, a mounting frame, a cylindrical rubber brush and a bottom brush strip. According to the utility model, the reliable self-cleaning filter unit is arranged, and the cleaning component is driven to work by utilizing the thrust generated by gas rising, so that the self-cleaning effect on the thin-wall filter cartridge is realized, and larger solid particle impurities in the introduced air can be filtered through the thin-wall filter cartridge and are prevented from entering the next filtering procedure; substances such as moisture, carbon dioxide and acetylene in the primarily filtered gas are further filtered in the re-filtering tank, so that the purity of the subsequently separated gas is ensured; and the molecular sieve particles in the re-filtering tank can be conveniently replaced, so that a good filtering effect is always kept.

Description

Technical Field

[0001] The utility model relates to the technical field of air separation, in particular to a self-cleaning air filter for an air separation device. Background Technique

[0002] An air separation plant is a device that uses air as a raw material and turns air into a liquid through a method of compression cycle and deep refrigeration, and then gradually separates and produces inert gases such as oxygen, nitrogen, and argon through rectification; when the air separation device is in use, it is necessary to filter the incoming air first to ensure the cleanliness of the incoming gas.

[0003] In the existing air separation device, the filter component is mainly cleaned by driving a brush with a power motor, and it is necessary for the staff to start the motor regularly to achieve the cleaning function, which increases the management cost; in addition, when filtering the components in the air, the molecular sieve particles used for gas component filtration are prone to failure after long-term use, and it is more troublesome to replace them. It is necessary to disassemble the device to replace them. For this reason, we propose a self-cleaning air filter for an air separation device. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a self-cleaning air filter for an air separation device, which has a reliable self-cleaning filtration unit. The thrust generated by the rising gas drives the cleaning component to work, so as to achieve the self-cleaning effect on the thin-wall filter cylinder. The thin-wall filter cylinder can filter out larger solid particle impurities in the incoming air and prevent solid particle impurities from entering the next filtration process; and it has a reliable gas re-filtration unit. The gas after primary filtration is further filtered in the re-filter tank to remove moisture, carbon dioxide, acetylene and other substances in the air, ensuring the purity of the subsequent separated gas; and the molecular sieve particles in the re-filter tank can be conveniently replaced to maintain a good filtration effect all the time, which can effectively solve the problems in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A self-cleaning air filter for an air separation device, including a re-filter tank, a self-cleaning filtration unit and a gas re-filtration unit;

[0006] Re-filter tank: Vertically arranged above the primary filter box. The primary filter box is a cylindrical structure and is connected to the re-filter tank through a connecting pipe.

[0007] Self-cleaning filtration unit: It includes a thin-walled filter cartridge, a linkage shaft, a fixed connecting rod, a bearing, a wind impeller, an installation frame, a cylindrical rubber brush, and a bottom brush strip. Inside the primary filter box, a thin-walled filter cartridge is installed. The upper end of the thin-walled filter cartridge is fixedly connected to the top of the primary filter box. Filter holes are provided on the side wall and bottom of the thin-walled filter cartridge, and the thin-walled filter cartridge does not contact the inner wall of the primary filter box. At a position near the primary filter box inside the connecting pipe, three fixed connecting rods are fixedly connected in a circumferential array. All three fixed connecting rods are horizontally oriented towards the central axis of the connecting pipe, and at the inner ends of the three rod bodies, a bearing is fixedly connected. The linkage shaft passes through the inner ring of the bearing and is fixedly connected to the inner ring of the bearing. A wind impeller is fixedly installed at the upper end of the linkage shaft. The lower end of the linkage shaft extends into the interior of the thin-walled filter cartridge and is fixedly connected to the middle of the upper end of the installation frame in the thin-walled filter cartridge. The installation frame is a square-structured frame. The left and right sides of the frame are vertical round rods connected by rotation. A cylindrical rubber brush is sleeved on the outer side of the round rod. A bottom brush strip is fixedly installed on the lower side of the lower crossbar of the installation frame. Short rubber rods are integrally fixedly connected to the outer sides of the cylindrical rubber brush and the bottom brush strip;

[0008] Gas secondary filtration unit: It is installed inside and below the secondary filter tank.

[0009] The primary filter box filters out larger solid particle impurities in the incoming air. The air after primary filtration is passed upward along the connecting pipe into the secondary filter tank, and in the secondary filter tank, moisture, carbon dioxide, acetylene, and other substances in the air are further filtered out to ensure the purity of the subsequent separated gas. The air entering the primary filter box enters the interior of the thin-walled filter cartridge through the filter holes on the thin-walled filter cartridge. The annular side wall of the thin-walled filter cartridge, in cooperation with the bottom structure, can allow more gas to pass through per unit time. The gas passing through the thin-walled filter cartridge is continuously transported upward. When passing through the connecting pipe, due to the driving effect of the gas, the wind impeller will be driven to rotate. The wind impeller synchronously drives the linkage shaft and the lower installation frame to rotate. When the installation frame rotates, through the rolling friction between the cylindrical rubber brush and the inner wall of the thin-walled filter cartridge, the annular side wall of the thin-walled filter cartridge is cleaned, and the bottom brush strip scrapes and cleans the bottom of the thin-walled filter cartridge. The short rubber rods on the two brush strips can pass through the filter holes on the surface of the thin-walled filter cartridge, thereby conducting the filter holes. This process uses the thrust generated by the rising gas to drive the cleaning components to work, thereby achieving the self-cleaning effect of the thin-walled filter cartridge. The fixed connecting rod is used for the installation of the bearing, and the bearing is used for the installation and support of the linkage shaft and enables the linkage shaft to rotate. The gas secondary filtration unit is used to filter moisture and gas impurities in the air to ensure the purity of the subsequent separated gas.

[0010] Further, the gas double filtration unit includes molecular sieve particles, a mounting seat, a solenoid valve, a discharge pipe, and a fixing ring. The molecular sieve particles are filled inside the double filtration tank. The lower side of the double filtration tank is fixedly connected to the mounting seat, and the connecting pipe passes through the inside of the mounting seat. A solenoid valve is installed at the upper port of the connecting pipe. A circular area of gas through holes is opened on the valve plate of the solenoid valve, and the diameter of the gas through holes is smaller than the diameter of the molecular sieve particles. The middle of the upper end of the double filtration tank is fixedly connected to a fixing ring with a frustum shape. The discharge pipe is vertically installed inside the fixing ring, and its lower end is communicated with the inside of the double filtration tank. There are gaps between the filled molecular sieve particles. When the air rises, it passes through the gaps between the molecular sieve particles, and substances such as moisture, carbon dioxide, and acetylene contained in it are filtered out, ensuring the purity of the subsequent separated gases such as oxygen and nitrogen. The purified gas after double filtration is discharged upward along the discharge pipe. The fixing ring is used for the installation and fixation of the discharge pipe and plays a sealing effect at the pipe connection. The molecular sieve particles can be blocked by the valve plate of the solenoid valve, but the gas is allowed to pass upward. The mounting seat is used for the installation of the molecular sieve particle discharge component.

[0011] Further, the gas double filtration unit also includes a plugging slideway, a guide plate, an inclined channel, a hydraulic cylinder, and a connecting block. An inclined plugging slideway is opened inside the mounting seat. The plugging slideway is higher on the left and lower on the right and intersects with the connecting pipe. A guide plate is slidably connected inside the plugging slideway. The inside of the guide plate is hollow and a square notch is opened on the upper left side. Hydraulic cylinders are embedded and installed on both the front and rear sides of the plugging slideway inside the mounting seat. The hydraulic cylinders are parallel to the guide plate, and the telescopic rods of the hydraulic cylinders are fixedly connected to the guide plate through the connecting blocks at the ends. When the molecular sieve particles are used for a period of time, their adsorption and filtration effects will gradually weaken to below the use standard and need to be replaced. When replacing the molecular sieve particles, the hydraulic cylinder drives the guide plate to slide obliquely upward through the connecting block, so that the square notch at its upper end is aligned with the connecting pipe. Then the solenoid valve is opened, so that the molecular sieve particles in the double filtration tank leak downward, and the molecular sieve particles are discharged obliquely downward and outward through the internal channel of the guide plate.

[0012] Further, the gas double filtration unit also includes a reserve material tank, a feeding channel, and an electric baffle. A reserve material tank is installed and fixed at the upper position of each of the four sides of the double filtration tank. The reserve material tank is communicated with the inside of the double filtration tank through the feeding channel at the lower side. An electric baffle is installed at the position where the feeding channel is connected to the double filtration tank. The electric baffle slides vertically and can be stored upward inside the inner wall of the double filtration tank. The reserve material tank is used for storing spare molecular sieve particles. After the failed molecular sieve particles inside the double filtration tank are emptied, the solenoid valve is restored to be closed and the electric baffle at the feeding channel is opened, so that new molecular sieve particles enter the inside of the double filtration tank. Then the electric baffle is closed, and the gas filtration can continue. A total of four reserve material tanks are provided on the outside of the double filtration tank, and the molecular sieve particles can be replenished multiple times, avoiding the disassembly of the device.

[0013] Further, it further includes a tightening seat and an air inlet pipe opening. The tightening seat is screwed and installed at the lower end of the primary filter box, and a vertical air inlet pipe opening is fixedly connected to the center position at the lower end of the tightening seat. The air inlet pipe opening is used for sleeving an air delivery pipe to connect to an input air source. By unscrewing the tightening seat, the sundries inside the primary filter box can be cleaned.

[0014] Further, the gas double-filtering unit further includes a sealing rubber block. The sealing rubber block is fixedly installed on the upper left side of the flow guiding plate, and the edge of the sealing rubber block is closely attached to the inner wall of the insertion slideway. The sealing rubber block can seal the intersection of the insertion slideway and the connecting pipe after the flow guiding plate opens the connecting pipe, preventing gas from escaping outward from the insertion slideway.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: This self-cleaning air filter of the air separation device has the following advantages:

[0016] 1. It has a reliable self-cleaning filtering unit, which uses the thrust generated by the rising gas to drive the cleaning component to work, thereby achieving the self-cleaning effect on the thin-walled filter cartridge. Through the thin-walled filter cartridge, larger solid particle impurities in the incoming air can be filtered, preventing solid particle sundries from entering the next filtering process;

[0017] 2. It has a reliable gas double-filtering unit. The gas after primary filtering further filters out substances such as moisture, carbon dioxide, and acetylene in the air in the double-filtering tank, ensuring the purity of the subsequent separated gas; and the molecular sieve particles in the double-filtering tank can be conveniently replaced to maintain a good filtering effect all the time;

[0018] 3. The present utility model has a reliable self-cleaning filtering unit, which uses the thrust generated by the rising gas to drive the cleaning component to work, thereby achieving the self-cleaning effect on the thin-walled filter cartridge. Through the thin-walled filter cartridge, larger solid particle impurities in the incoming air can be filtered, preventing solid particle sundries from entering the next filtering process; and it has a reliable gas double-filtering unit. The gas after primary filtering further filters out substances such as moisture, carbon dioxide, and acetylene in the air in the double-filtering tank, ensuring the purity of the subsequent separated gas; and the molecular sieve particles in the double-filtering tank can be conveniently replaced to maintain a good filtering effect all the time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the present utility model;

[0020] Figure 2 It is a full cross-sectional view of the present utility model;

[0021] Figure 3 It is of the present utility model Figure 1 The enlarged view of the structure at A in;

[0022] Figure 4 For the present utility model Figure 2 is an enlarged view of the structure at position B in this utility model;

[0023] Figure 5 For the present utility model Figure 2 is an enlarged view of the structure at position C in this utility model.

[0024] In the figure: 1 multiple - filter tank, 2 primary - filter box, 3 connecting pipeline, 4 self - cleaning filtration unit, 41 thin - walled filter cylinder, 42 linkage shaft, 43 fixed connecting rod, 44 bearing, 45 wind impeller, 46 mounting frame, 47 cylindrical rubber brush, 48 bottom brush strip, 5 gas multiple - filter unit, 51 molecular sieve particles, 52 mounting seat, 53 plug - in slideway, 54 guide plate, 55 inclined channel, 56 solenoid valve, 57 sealing rubber block, 58 reserve material box, 59 feed channel, 510 electric baffle, 511 hydraulic cylinder, 512 connecting block, 513 discharge pipe, 514 fixing ring, 6 tightening seat, 7 air inlet port. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0026] Please refer to Figures 1 - 5 , this embodiment provides a technical solution: a self - cleaning air filter for an air separation device, including a multiple - filter tank 1, a cleaning filtration unit 4, and a gas multiple - filter unit 5;

[0027] Multiple - filter tank 1: Vertically arranged above the primary - filter box 2. The primary - filter box 2 is a cylindrical structure and is connected to the multiple - filter tank 1 through a connecting pipeline 3;

[0028] Self-cleaning filtration unit 4: It includes a thin-walled filter cartridge 41, a linkage shaft 42, fixed connecting rods 43, bearings 44, a wind impeller 45, a mounting frame 46, a cylindrical rubber brush 47, and a bottom brush strip 48. The thin-walled filter cartridge 41 is installed inside the primary filter box 2. The upper end of the thin-walled filter cartridge 41 is fixedly connected to the top of the primary filter box 2. Filter holes are provided on the side wall and bottom of the thin-walled filter cartridge 41, and the thin-walled filter cartridge 41 does not contact the inner wall of the primary filter box 2. At a position inside the connecting pipe 3 and close to the primary filter box 2, three fixed connecting rods 43 are fixedly connected in a circumferential array. The three fixed connecting rods 43 are all horizontally oriented towards the central axis of the connecting pipe 3, and bearings 44 are fixedly connected to the inner ends of the three rod bodies facing inwards. The linkage shaft 42 passes through the inner ring of the bearing 44 and is fixedly connected to the inner ring of the bearing 44. The upper end of the linkage shaft 42 is fixedly installed with a wind impeller 45. The lower end of the linkage shaft 42 extends into the interior of the thin-walled filter cartridge 41 and is fixedly connected to the middle of the upper end of the mounting frame 46 in the thin-walled filter cartridge 41. The mounting frame 46 is a square-structured frame. The left and right sides of the frame are vertical round rods connected by rotation. A cylindrical rubber brush 47 is sleeved on the outer side of the round rod. A bottom brush strip 48 is fixedly installed on the lower side of the lower cross bar of the mounting frame 46. Short rubber rods are integrally fixedly connected to the outer sides of the cylindrical rubber brush 47 and the bottom brush strip 48;

[0029] Gas secondary filtration unit 5: It is installed inside and below the secondary filter tank 1.

[0030] The primary filter box 2 filters out larger solid particle impurities in the incoming air. The air after primary filtration enters the secondary filter tank 1 upward along the connecting pipe 3, and in the secondary filter tank 1, moisture, carbon dioxide, acetylene and other substances in the air are further filtered out to ensure the purity of the subsequent separated gas. The air entering the primary filter box 2 enters the interior of the thin-walled filter cartridge 41 through the filter holes on the thin-walled filter cartridge 41. The annular side wall of the thin-walled filter cartridge 41, in cooperation with the bottom structure, can allow more gas to pass through per unit time. The gas passing through the thin-walled filter cartridge 41 is continuously transported upward. When passing through the connecting pipe 3, due to the driving effect of the gas, it will drive the wind impeller 45 to rotate. The wind impeller 45 synchronously drives the linkage shaft 42 and the lower mounting frame 46 to rotate. When the mounting frame 46 rotates, through the rolling friction between the cylindrical rubber brush 47 and the inner wall of the thin-walled filter cartridge 41, the annular side wall of the thin-walled filter cartridge 41 is cleaned, and the bottom brush strip 48 scrapes and cleans the bottom of the thin-walled filter cartridge 41. The short rubber rods on the two kinds of brush strips can pass through the filter holes on the surface of the thin-walled filter cartridge 41, thereby conducting the filter holes. This process uses the thrust generated by the rising gas to drive the cleaning components to work, so as to achieve the self-cleaning effect of the thin-walled filter cartridge 41. The fixed connecting rods 43 are used for the installation of the bearings 44. The bearings 44 are used for the installation and support of the linkage shaft 42 and enable the linkage shaft 42 to rotate. The gas secondary filtration unit 5 is used to filter moisture and gas impurities in the air to ensure the purity of the subsequent separated gas.

[0031] The gas double filtration unit 5 includes molecular sieve particles 51, a mounting seat 52, a solenoid valve 56, a discharge pipe 513 and a fixing ring 514. The molecular sieve particles 51 are filled inside the double filtration tank 1. The lower side of the double filtration tank 1 is fixedly connected with the mounting seat 52. The connecting pipe 3 passes through the inside of the mounting seat 52. A solenoid valve 56 is installed at the upper port of the connecting pipe 3. A circular area of gas through holes is opened on the valve plate of the solenoid valve 56. The diameter of the gas through holes is smaller than the diameter of the molecular sieve particles 51. The middle part of the upper end of the double filtration tank 1 is fixedly connected with a fixing ring 514 of a frustum shape. The discharge pipe 513 is vertically installed inside the fixing ring 514, and its lower end is communicated with the inside of the double filtration tank 1. There are gaps between the filled molecular sieve particles 51. When the air rises, it passes through the gaps between the molecular sieve particles 51, and substances such as moisture, carbon dioxide, and acetylene contained in it are filtered out, ensuring the purity of the subsequent separated gases such as oxygen and nitrogen. The purified gas after double filtration is discharged upward along the discharge pipe 513. The fixing ring 514 is used for the installation and fixation of the discharge pipe 513 and plays a sealing effect at the pipe connection. The molecular sieve particles 51 can be blocked by the valve plate of the solenoid valve, but the gas is allowed to pass upward. The mounting seat 52 is used for the installation of the molecular sieve particle discharging component.

[0032] The gas double filtration unit 5 further includes a plugging slideway 53, a flow guiding plate 54, an inclined channel 55, a hydraulic cylinder 511 and a connecting block 512. An inclined plugging slideway 53 is opened inside the mounting seat 52. The plugging slideway 53 is higher on the left and lower on the right and intersects with the connecting pipe 3. A flow guiding plate 54 is slidably connected inside the plugging slideway 53. The inside of the flow guiding plate 54 is hollow and a square notch is opened on the upper left side. A hydraulic cylinder 511 is embedded and installed on both the front and rear sides of the plugging slideway 53 inside the mounting seat 52. The hydraulic cylinder 511 is parallel to the flow guiding plate 54. The telescopic rod of the hydraulic cylinder 511 is fixedly connected with the flow guiding plate 54 through the connecting block 512 at the end. When the molecular sieve particles 51 are used for a period of time, their adsorption and filtration effect will gradually weaken below the use standard and need to be replaced. When replacing the molecular sieve particles 51, the hydraulic cylinder 511 drives the flow guiding plate 54 to slide obliquely upward through the connecting block 512, so that the square notch at its upper end is aligned with the connecting pipe 3. Then the solenoid valve 56 is opened, so that the molecular sieve particles 51 in the double filtration tank 1 leak downward, and the molecular sieve particles 51 are discharged obliquely downward and outward through the internal channel of the flow guiding plate 54.

[0033] The gas double filtration unit 5 further includes a reserve bin 58, a feed channel 59, and an electric baffle 510. A reserve bin 58 is fixedly installed at the upper position of each of the four sides of the double filtration tank 1. The reserve bin 58 is connected to the inside of the double filtration tank 1 through the feed channel 59 at the lower side. An electric baffle 510 is installed at the position where the feed channel 59 is connected to the double filtration tank 1. The electric baffle 510 slides vertically and can be stored upward in the inner wall of the double filtration tank 1. The reserve bin 58 is used for storing the spare molecular sieve particles 51. After the failed molecular sieve particles 51 inside the double filtration tank 1 are emptied, the closing of the recovery solenoid valve 56 is restored and the electric baffle 510 at the feed channel 59 is opened, so that the new molecular sieve particles 51 enter the inside of the double filtration tank 1. Then the electric baffle 510 is closed, and the gas filtration can continue. A total of four reserve bins 58 are provided on the outside of the double filtration tank 1, and the molecular sieve particles 51 can be replenished multiple times, avoiding the disassembly of the device.

[0034] It further includes a tightening seat 6 and an air inlet port 7. The tightening seat 6 is screwed and installed at the lower end of the primary filtration box 2. A vertical air inlet port 7 is fixedly connected to the center position at the lower end of the tightening seat 6. The air inlet port 7 is used for sleeving an air delivery pipe to connect to the input air source. By unscrewing the tightening seat 6, the debris inside the primary filtration box 2 can be cleaned.

[0035] The gas double filtration unit 5 further includes a sealant block 57. The sealant block 57 is fixedly installed on the upper left side of the baffle plate 54. The edge of the sealant block 57 is in close fit with the inner wall of the insertion slideway 53. The sealant block 57 can seal the intersection of the insertion slideway 53 and the connecting pipe 3 after the baffle plate 54 opens the connecting pipe 3, preventing the gas from escaping from the insertion slideway 53.

[0036] The working principle of the self-cleaning air filter of the air separation device provided by the present utility model is as follows: This filter has a reliable self-cleaning filter unit 4. The thrust generated by the rising gas drives the cleaning components to work, thereby achieving the self-cleaning effect on the thin-walled filter cartridge 41. The larger solid particle impurities in the incoming air can be filtered by the thin-walled filter cartridge 41 to prevent solid particle impurities from entering the next filtration process: The primary filter box 2 filters the larger solid particle impurities in the incoming air. The air after primary filtration passes upward along the connecting pipe 3 into the secondary filtration tank 1, and further filters out substances such as moisture, carbon dioxide, and acetylene in the air in the secondary filtration tank 1 to ensure the purity of the subsequent separated gas. The air entering the primary filter box 2 enters the interior of the thin-walled filter cartridge 41 through the filter holes on the thin-walled filter cartridge 41. The annular side wall of the thin-walled filter cartridge 41 cooperates with the bottom structure to allow more gas to pass through per unit time. The gas after passing through the thin-walled filter cartridge 41 is continuously conveyed upward. When passing through the connecting pipe 3, due to the pushing effect of the gas, the wind impeller 45 will be driven to rotate. The wind impeller 45 synchronously drives the linkage shaft 42 and the lower mounting frame 46 to rotate. When the mounting frame 46 rotates, through the rolling friction between the cylindrical rubber brush 47 and the inner wall of the thin-walled filter cartridge 41, the annular side wall of the thin-walled filter cartridge 41 is cleaned, and the bottom brush strip 48 scrapes and cleans the bottom of the thin-walled filter cartridge 41. The short rubber rods on both types of brush strips can pass through the filter holes on the surface of the thin-walled filter cartridge 41, thereby conducting the filter holes. This process uses the thrust generated by the rising gas to drive the cleaning components to work, thereby achieving the self-cleaning effect on the thin-walled filter cartridge 41. The fixed connecting rod 43 is used for the installation of the bearing 44, and the bearing 44 is used for the installation and support of the linkage shaft 42 and enables the linkage shaft 42 to rotate. This filter also has a reliable gas secondary filtration unit 5. The gas after primary filtration further filters out substances such as moisture, carbon dioxide, and acetylene in the air in the secondary filtration tank 1 to ensure the purity of the subsequent separated gas; and the molecular sieve particles 51 in the secondary filtration tank 1 can be conveniently replaced to maintain a good filtration effect at all times: The interior of the secondary filtration tank 1 is filled with molecular sieve particles 51, and there are gaps between the filled molecular sieve particles 51. When the air rises, it passes through the gaps between the molecular sieve particles 51 and the substances such as moisture, carbon dioxide, and acetylene contained in it are filtered out to ensure the purity of the subsequent separated gases such as oxygen and nitrogen. The clean gas after secondary filtration is discharged upward along the discharge pipe 513. The fixing ring 514 is used for the installation and fixation of the discharge pipe 513 and plays a sealing effect at the pipe connection. The valve plate of the solenoid valve can block the molecular sieve particles 51, but allows the gas to pass upward. The mounting seat 52 is used for the installation of the molecular sieve particle discharge component; When the molecular sieve particles 51 are used for a period of time, their adsorption and filtration effects will gradually weaken below the use standard and need to be replaced.When replacing the molecular sieve particles 51, the hydraulic cylinder 511 drives the flow guide plate 54 to slide obliquely upward through the connecting block 512, aligning the square notch at its upper end with the connecting pipe 3. Subsequently, the solenoid valve 56 is opened, allowing the molecular sieve particles 51 in the double-filter tank 1 to leak downward, and discharging the molecular sieve particles 51 obliquely downward and outward through the internal channel of the flow guide plate 54. The reserve bin 58 is used for storing spare molecular sieve particles 51. When the failed molecular sieve particles 51 inside the double-filter tank 1 are emptied, the solenoid valve 56 is restored to its closed state and the electric baffle 510 at the feed channel 59 is opened, enabling new molecular sieve particles 51 to enter the double-filter tank 1. Subsequently, the electric baffle 510 is closed, and gas filtration can continue. A total of four reserve bins 58 are provided on the outside of the double-filter tank 1, which can replenish the molecular sieve particles 51 multiple times, avoiding the disassembly of the device. In addition, the air inlet port 7 is used to socket an air delivery pipe to connect to the input air source. By unscrewing the tightening seat 6, the debris inside the primary filter box 2 can be cleaned. The sealing rubber block 57 can seal the intersection of the insertion slideway 53 and the connecting pipe 3 after the flow guide plate 54 opens the connecting pipe 3, preventing gas from escaping outward through the insertion slideway 53.

[0037] It should be noted that the input ends of the solenoid valve 56, the electric baffle 510, and the hydraulic cylinder 511 disclosed in the above embodiments are all electrically connected to the output end of the external power supply through an external control switch group, and the external control switch group controls the operation of the solenoid valve 56, the electric baffle 510, and the hydraulic cylinder 511 using methods commonly used in the prior art.

[0038] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A self-cleaning air filter for an air separation device, characterized in that: It comprises a re-filtration tank (1), a clean filtration unit (4) and a gas re-filtration unit (5); The secondary filter tank (1) is vertically arranged above the primary filter box (2); the primary filter box (2) is a cylindrical structure and is connected to the secondary filter tank (1) via a connecting pipe (3); The self-cleaning filter unit (4) comprises a thin-walled filter cartridge (41), a linkage shaft (42), a fixed connecting rod (43), a bearing (44), a fan impeller (45), a mounting frame (46), a cylindrical rubber brush (47) and a bottom brush strip (48). The thin-walled filter cartridge (41) is installed inside the primary filter box (2). The upper end of the thin-walled filter cartridge (41) is fixedly connected to the top of the primary filter box (2). The side wall and the bottom of the thin-walled filter cartridge (41) are provided with filter holes, and the thin-walled filter cartridge (41) is not connected to the inner wall of the primary filter box (2). Three fixed connecting rods (43) are fixedly connected in a circular array inside the connecting pipe (3) and close to the primary filter box (2). The three fixed connecting rods (43) are all horizontally oriented towards the central axis of the connecting pipe (3), and the three fixed connecting rods (43) are arranged in a circular array. The inner end of the rod body is fixedly connected to a bearing (44), the linkage shaft (42) passes through the inner ring of the bearing (44) and is fixedly connected to the inner ring of the bearing (44), the upper end of the linkage shaft (42) is fixedly installed with a fan impeller (45), the lower end of the linkage shaft (42) extends into the interior of the thin-walled filter cartridge (41), and is fixedly connected to the middle part of the upper end of the mounting frame (46) in the thin-walled filter cartridge (41), the mounting frame (46) is a square structure frame, the left and right sides of the frame are rotatably connected vertical round rods, the outer side of the round rod is sleeved with a cylindrical rubber brush (47), the lower side of the lower end cross bar of the mounting frame (46) is fixedly installed with a bottom brush strip (48), and the outer sides of the cylindrical rubber brush (47) and the bottom brush strip (48) are both fixedly connected with a short rubber stick in an integrated manner; Gas re-filtration unit (5): installed inside and underside of the re-filtration tank (1).

2. The self-cleaning air filter of the air separation device according to claim 1, characterized in that: The gas re-filtration unit (5) comprises molecular sieve particles (51), a mounting seat (52), an electromagnetic valve (56), a discharge pipe (513) and a fixing ring (514); the interior of the re-filtration tank (1) is filled with molecular sieve particles (51); the mounting seat (52) is fixedly connected to the lower side of the re-filtration tank (1); the connecting pipe (3) passes through the interior of the mounting seat (52); the electromagnetic valve (56) is installed at the upper end of the connecting pipe (3); a circular gas through hole is opened on the valve plate of the electromagnetic valve (56); the diameter of the gas through hole is smaller than the diameter of the molecular sieve particles (51); the fixing ring (514) with a frustum-shaped structure is fixedly connected to the middle part of the upper end of the re-filtration tank (1); the discharge pipe (513) is vertically installed inside the fixing ring (514), and its lower end is connected to the interior of the re-filtration tank (1).

3. The self-cleaning air filter of the air separation device according to claim 2, characterized in that: The gas re-filtration unit (5) further comprises a plug-in slideway (53), a guide plate (54), an oblique channel (55), a hydraulic cylinder (511) and a connecting block (512); an inclined plug-in slideway (53) is provided inside the mounting seat (52); the plug-in slideway (53) is higher on the left and lower on the right and intersects with the connecting pipe (3); the plug-in slideway (53) is slidably connected with the guide plate (54) inside; the guide plate (54) is hollow inside and has a square notch on the upper left side; a hydraulic cylinder (511) is embedded and installed inside the mounting seat (52) and on both the front and rear sides of the plug-in slideway (53); the hydraulic cylinder (511) and the guide plate (54) are parallel to each other; and the telescopic rod of the hydraulic cylinder (511) is fixedly connected to the guide plate (54) through the connecting block (512) at the end.

4. The self-cleaning air filter of the air separation device according to claim 1, characterized in that: The gas re-filtration unit (5) further comprises a reserve material box (58), a feed channel (59) and an electric baffle (510); a reserve material box (58) is fixedly installed at the upper position of each of the four side surfaces of the re-filtration tank (1); the reserve material box (58) is connected to the interior of the re-filtration tank (1) through the feed channel (59) at the lower side; an electric baffle (510) is installed at the position where the feed channel (59) connects to the re-filtration tank (1); the electric baffle (510) slides vertically and can be stored upward in the inner wall of the re-filtration tank (1).

5. The self-cleaning air filter of the air separation device according to claim 1, characterized in that: It also includes a screw-on seat (6) and an air intake pipe opening (7); the lower end of the primary filter box (2) is screwed with the screw-on seat (6), and the lower end of the screw-on seat (6) is fixedly connected with a vertical air intake pipe opening (7) at the center of the circle.

6. The self-cleaning air filter of the air separation device according to claim 3, characterized in that: The gas re-filtration unit (5) further comprises a sealing rubber block (57), and the sealing rubber block (57) is fixedly mounted on the left side of the upper end of the guide plate (54), and the edge of the sealing rubber block (57) is tightly fitted with the inner wall of the plug-in slideway (53).

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