Ultrahigh molecular weight polyethylene fluorinated membrane filtering device

Abstract

The invention belongs to the technical field of polyethylene fluorinated membrane filtration, and particularly relates to an ultra-high molecular weight polyethylene fluorinated membrane filtration device, which comprises a filter box, support frames, a diameter detection type gas transmission mechanism and an extension measurement type impurity filtration mechanism, the support frames are symmetrically arranged on two sides of the filter box, one end of the filter box is open, and the other end of the filter box is open; the diameter detection type gas transmission mechanism is arranged at one end, far away from the opening, of the filter box, the extension measurement type impurity filtering mechanism is arranged in the filter box, and the diameter detection type gas transmission mechanism comprises a gas inlet mechanism, a particle measurement mechanism and an auxiliary pumping mechanism. The ultra-high molecular weight polyethylene fluorinated membrane filtering device provided by the invention can reduce the gas filtering resistance of a multi-layer membrane, accelerate the gas filtering speed, test the filtering performance of the membrane, and ensure that the membrane purifies the gas under high performance.

Description

Technical Field

[0001] The invention belongs to the technical field of polyethylene fluoride membrane filtration, and specifically refers to an ultra-high molecular weight polyethylene fluoride membrane filtration device. Background Art

[0002] Polyethylene fluoride membranes, especially polytetrafluoroethylene (PTFE) membranes, are widely used in the field of filtration. During the filtration process, when dust-laden gas or liquid passes through the polytetrafluoroethylene membrane, the particles will be retained on the surface of the membrane, while the clean gas or liquid continues to flow through the membrane pores.

[0003] The existing polyethylene fluoride membrane filtration device has the following problems: When the existing polyethylene fluoride membrane filter device uses a multi-layer membrane to filter gas, it has a large resistance to the gas, resulting in a slow flow rate of the gas in the membrane layer, and is unable to quickly filter air or other gases. In addition, the traditional polyethylene fluoride membrane filter device does not have the ability to test the filtering performance of the membrane. The chemical substances contained in the air will continue to accumulate inside the membrane, thereby chemically degrading the membrane, thereby reducing the filtering efficiency of the membrane. Therefore, it cannot meet the existing use requirements of the polyethylene fluoride membrane filter device. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an ultra-high molecular weight polyethylene fluoride membrane filtration device which can reduce the gas filtration resistance of the multi-layer membrane, speed up the gas filtration speed, and test the filtration performance of the membrane to ensure that the membrane can purify the gas under high performance.

[0005] The technical scheme adopted in this scheme is as follows: This scheme proposes an ultra-high molecular weight polyethylene fluoride membrane filtration device, including a filter box, a support frame, a diameter-detecting gas supply mechanism and a measuring and stretching type impurity filtering mechanism, the support frame is symmetrically arranged on both sides of the filter box, the filter box is open at one end, the diameter-detecting gas supply mechanism is arranged at the end of the filter box away from the opening, the measuring and stretching type impurity filtering mechanism is arranged inside the filter box, the diameter-detecting gas supply mechanism includes an air intake mechanism, a particle measuring mechanism and an auxiliary extraction mechanism, the air intake mechanism is arranged on one side of the filter box, the particle measuring mechanism is arranged at one end of the filter box close to the air intake mechanism, the auxiliary extraction mechanism is arranged between the air intake mechanism and the particle measuring mechanism, the measuring and stretching type impurity filtering mechanism includes a purification mechanism, a flow-increasing mechanism and an exhaust mechanism, the purification mechanism is arranged on the inner wall of the filter box, the flow-increasing mechanism is arranged on the upper wall and the bottom wall of the filter box, and the exhaust mechanism is arranged on the side of the filter box away from the air intake mechanism.

[0006] As a further preferred embodiment of the present invention, the air intake mechanism includes an air supply duct and an air intake duct, the air supply duct is connected and arranged on one side of the filter box, and the air intake duct is connected and arranged on the side of the air supply duct away from the filter box; the particle measuring mechanism includes an auxiliary frame, a particle measuring box and a laser dust particle sensor, the auxiliary frame is symmetrically arranged on one end of the filter box close to the air supply duct, the particle measuring box is arranged on the side of the auxiliary frame away from the filter box, the laser dust particle sensor is arranged on the side of the particle measuring box close to the support frame, and the detection end of the laser dust particle sensor is penetrated into the interior of the particle measuring box; the auxiliary extraction mechanism includes an air pump and an auxiliary extraction pipe, the air pump is symmetrically arranged at both ends of the air intake duct, the air extraction end of the air pump is penetrated into the air intake duct, and the auxiliary extraction pipe is connected between the side of the particle measuring box away from the laser dust particle sensor and the exhaust end of the air pump.

[0007] When in use, the air to be purified enters the air supply pipe through the air intake pipe, the air supply pipe transports the air to the filter box for filtering, the vacuum pump draws part of the gas entering the air intake pipe into the auxiliary suction pipe through the suction end, and the auxiliary suction pipe transports the gas to the particle measuring box for detection.

[0008] Preferably, the purification mechanism comprises a filter frame, a chute, a solid film plate and a polyethylene fluoride membrane, multiple groups of the filter frames are arranged on the inner wall of the filter box, the chute is arranged on the inner walls on both sides of the filter frame, the chute is opened on three sides, the solid film plate is arranged inside the chute, and the polyethylene fluoride membrane is arranged between the solid film plates; the flow-increasing mechanism comprises a stretching box, a stretching magnetic block, a stretching frame, a stretching spring, a driving electromagnet and a scale ruler, the stretching box passes through the filter box and is arranged on the upper wall and the bottom wall of the filter frame, the stretching magnetic block is slidably arranged between the inner wall of the stretching box and the chute, the stretching frame is arranged on the side of the stretching box away from the filter box, multiple groups of the stretching springs are arranged between the side of the stretching frame close to the stretching box and the stretching magnetic block, multiple groups of the driving electromagnets are arranged through the inner wall of the stretching frame, the stretching magnetic block and the driving electromagnet are arranged opposite to each other, and the scale ruler is arranged on the side wall of the stretching box; the exhaust mechanism comprises an exhaust box and an exhaust valve, the exhaust box is connected and arranged on the side of the filter box away from the air supply pipeline, and multiple groups of the exhaust valves are connected and arranged on the side of the exhaust box away from the filter box.

[0009] When in use, in the initial state, the stretchable filter mechanism is in the extension setting, and the polyethylene fluoride membrane maintains its original thickness to filter the air entering the filter box. The polyethylene fluoride membrane has a large resistance to the gas, resulting in a slower flow rate of the gas in the membrane layer. According to the particle size of the particulate impurities in the gas detected by the laser dust sensor, the resistance of multiple groups of polyethylene fluoride membranes to the passing gas is adjusted.

[0010] Specifically, a controller is provided on the side wall of the particle measuring box.

[0011] Wherein, the controller is electrically connected to the laser dust particle sensor, the air pump and the driving electromagnet respectively.

[0012] Preferably, the model of the laser dust particle sensor is PM2008MSE.

[0013] The beneficial effects achieved by adopting the above structure are as follows: Compared with the prior art, the present invention adopts a method of combining a stretching structure with a diameter measuring structure. By setting up a diameter-detecting gas transmission mechanism and a stretching impurity filtering mechanism, the air intake mechanism, the particle measuring mechanism, the auxiliary extraction mechanism, the purification mechanism, the flow-increasing mechanism and the exhaust mechanism can be used in coordination with each other. According to the different particle sizes of the particles in the air, the polyethylene fluoride membrane can be stretched by utilizing the deformation of the stretching spring, and the pore size inside the polyethylene fluoride membrane can be accurately adjusted to improve the gas passage rate and reduce the resistance of the gas containing large particles through the polyethylene fluoride membrane. When the impurity particle size in the gas sampled and detected by the laser dust particle sensor is relatively large, the driving electromagnet is energized to generate magnetism, the driving electromagnet and the stretching magnetic block are arranged with opposite poles, the driving electromagnet is fixed on the inner wall of the stretching frame and the stretching magnetic block is adsorbed by magnetic force, the current passed into the driving electromagnet increases, the magnetic field strength between the driving electromagnet and the stretching magnetic block increases, the stretching magnetic block uses the deformation of the stretching spring to stretch the polyethylene fluoride membrane, the pore size of the polyethylene fluoride membrane increases, and thus the resistance of the gas passing through the polyethylene fluoride membrane is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of this scheme; Figure 2 This is the main stereogram of the scheme; Figure 3 This is a bottom-up stereogram of the scheme; Figure 4 This is a schematic diagram of the internal structure of this scheme; Figure 5 This is a schematic diagram of the combined structure of the filter box and the support frame of this solution; Figure 6 This is the main view of this scheme; Figure 7 This is the left view of this scheme; Figure 8 This is the right view of this scheme; Fig. 9 This is a top view of the scheme; Fig.10 for Fig. 9 AA section view of the part; Fig.11 for Figure 6 A cross-sectional view of the BB portion; Fig.12 for Figure 4A magnified structural view of part I; Fig.13 for Fig.10 A magnified structural view of Part II; Fig.14 for Figure 5 A magnified structural view of Part III.

[0015] Among them, 1. filter box, 2. support frame, 3. diameter-detecting gas transmission mechanism, 4. air intake mechanism, 5. air delivery pipeline, 6. air intake pipeline, 7. particle measuring mechanism, 8. auxiliary frame, 9. particle measuring box, 10. laser dust particle sensor, 11. auxiliary extraction mechanism, 12. air pump, 13. auxiliary extraction pipe, 14. stretching type filtering mechanism, 15. purification mechanism, 16. filter frame, 17. slide chute, 18. solid film plate, 19. polyethylene fluoride membrane, 20. flow-increasing mechanism, 21. stretching box, 22. stretching magnet, 23. stretching frame, 24. stretching spring, 25. driving electromagnet, 26. scale, 27. exhaust mechanism, 28. exhaust box, 29. exhaust valve, 30. controller.

[0016] The accompanying drawings are used to provide further understanding of the present scheme and constitute a part of the specification. Together with the embodiments of the present scheme, they are used to explain the present scheme and do not constitute a limitation on the present scheme. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the present scheme will be clearly and completely described below in conjunction with the drawings in the embodiments of the present scheme. Obviously, the described embodiments are only part of the embodiments of the present scheme, not all of the embodiments; based on the embodiments in the present scheme, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present scheme.

[0018] In the description of this scheme, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this scheme.

[0019] like Figure 1-Figure 14As shown, the present invention proposes an ultra-high molecular weight polyethylene fluoride membrane filtration device, comprising a filter box 1, a support frame 2, a diameter-detecting gas transmission mechanism 3 and a measuring and stretching type impurity filtering mechanism 14, wherein the support frame 2 is symmetrically arranged on both sides of the filter box 1, the filter box 1 is open at one end, the diameter-detecting gas transmission mechanism 3 is arranged at the end of the filter box 1 away from the opening, the measuring and stretching type impurity filtering mechanism 14 is arranged inside the filter box 1, the diameter-detecting gas transmission mechanism 3 includes an air intake mechanism 4, a particle measuring mechanism 7 and an auxiliary extraction mechanism 1 1, the air intake mechanism 4 is arranged on one side of the filter box 1, the particle measuring mechanism 7 is arranged at one end of the filter box 1 close to the air intake mechanism 4, the auxiliary extraction mechanism 11 is arranged between the air intake mechanism 4 and the particle measuring mechanism 7, the measuring and stretching type impurity filtering mechanism 14 includes a purification mechanism 15, a flow-increasing mechanism 20 and an exhaust mechanism 27, the purification mechanism 15 is arranged on the inner wall of the filter box 1, the flow-increasing mechanism 20 is arranged on the upper wall and the bottom wall of the filter box 1, and the exhaust mechanism 27 is arranged on the side of the filter box 1 away from the air intake mechanism 4.

[0020] The air intake mechanism 4 includes an air supply pipe 5 and an air intake pipe 6, the air supply pipe 5 is connected and arranged on one side of the filter box 1, and the air intake pipe 6 is connected and arranged on the side of the air supply pipe 5 away from the filter box 1; the particle measuring mechanism 7 includes an auxiliary frame 8, a particle measuring box 9 and a laser dust particle sensor 10, the auxiliary frame 8 is symmetrically arranged on one end of the filter box 1 close to the air supply pipe 5, the particle measuring box 9 is arranged on the side of the auxiliary frame 8 away from the filter box 1, the laser dust particle sensor 10 is arranged on the side of the particle measuring box 9 close to the support frame 2, and the detection end of the laser dust particle sensor 10 is penetrated into the particle measuring box 9; the auxiliary extraction mechanism 11 includes an air pump 12 and an auxiliary extraction pipe 13, the air pump 12 is symmetrically arranged at both ends of the air intake pipe 6, the air extraction end of the air pump 12 is penetrated into the air intake pipe 6, and the auxiliary extraction pipe 13 is connected between the side of the particle measuring box 9 away from the laser dust particle sensor 10 and the exhaust end of the air pump 12.

[0021] The purification mechanism 15 includes a filter frame 16, a chute 17, a solid film plate 18 and a polyethylene fluoride membrane 19. Multiple groups of the filter frames 16 are arranged on the inner wall of the filter box 1, the chute 17 is arranged on the inner walls of both sides of the filter frame 16, the chute 17 is opened on three sides, the solid film plate 18 is arranged inside the chute 17, and the polyethylene fluoride membrane 19 is arranged between the solid film plates 18; the flow-increasing mechanism 20 includes a stretching box 21, a stretching magnetic block 22, a stretching frame 23, a stretching spring 24, a driving electromagnet 25 and a scale 26. The stretching box 21 passes through the filter box 1 and is arranged on the upper wall and bottom wall of the filter frame 16. The stretching magnetic block 22 is slidably arranged on the stretching frame 23. Between the inner wall of the stretching box 21 and the slide groove 17, the stretching frame 23 is arranged on the side of the stretching box 21 away from the filter box 1, and multiple groups of stretching springs 24 are arranged between the side of the stretching frame 23 close to the stretching box 21 and the stretching magnetic block 22. Multiple groups of driving electromagnets 25 are arranged through the inner wall of the stretching frame 23, the stretching magnetic block 22 and the driving electromagnet 25 are arranged opposite to each other, and the scale ruler 26 is arranged on the side wall of the stretching box 21; the exhaust mechanism 27 includes an exhaust box 28 and an exhaust valve 29, the exhaust box 28 is connected and arranged on the side of the filter box 1 away from the air supply pipe 5, and multiple groups of exhaust valves 29 are connected and arranged on the side of the exhaust box 28 away from the filter box 1.

[0022] A controller 30 is disposed on the side wall of the particle measuring box 9 .

[0023] The controller 30 is electrically connected to the laser dust sensor 10 , the air pump 12 , and the driving electromagnet 25 , respectively.

[0024] The model of the laser dust particle sensor 10 is PM2008MSE.

[0025] When used specifically, in Example 1, the air to be purified enters the air supply pipe 5 through the air intake pipe 6, and the air supply pipe 5 transports the air to the filter box 1 for filtering. The air pump 12 draws part of the gas entering the air intake pipe 6 into the auxiliary extraction pipe 13 through the extraction end, and the auxiliary extraction pipe 13 transports the gas to the particle measuring box 9 for detection. The laser dust particle sensor 10 tests the particle size of the particles in the gas through the detection end, and uses laser to irradiate the suspended particles in the air to generate light scattering. The detection end of the laser dust particle sensor 10 collects the scattered light intensity within a certain angle range, and linearly converts it into voltage, and then sends it to the data processing system. The data processing system processes the data according to a pre-programmed program to obtain the equivalent particle size of the particles and the number of particles of different particle sizes per unit volume; In the initial state, the stretchable impurity filtering mechanism 14 is in an extended setting, and the polyethylene fluoride membrane 19 maintains the original thickness to filter the air entering the filter box 1. The polyethylene fluoride membrane 19 has a large resistance to the gas, resulting in a slow flow speed of the gas in the membrane layer. According to the particle size of the particulate impurities in the gas detected by the laser dust sensor 10, the aperture of the multiple groups of polyethylene fluoride membranes 19 for passing the gas is adjusted; Working condition 1: When the impurity particle size in the gas sampled and detected by the laser dust particle sensor 10 is relatively large, the controller 30 controls the driving electromagnet 25 to start, the driving electromagnet 25 is energized to generate magnetism, the driving electromagnet 25 and the stretching magnet block 22 are arranged with opposite poles, the driving electromagnet 25 is fixed on the inner wall of the stretching frame 23 to absorb the stretching magnet block 22 by magnetic force, the controller 30 controls the current passed into the driving electromagnet 25 to increase, the magnetic field strength between the driving electromagnet 25 and the stretching magnet block 22 is enhanced, the stretching magnet block 22 uses the stretching spring 24 to deform to stretch the polyethylene fluoride film 19, the pore size of the polyethylene fluoride film 19 is increased, which can not only remove large particle impurities in the gas, but also reduce the resistance of the gas passing through the polyethylene fluoride film 19; Working condition 2: When the impurity particle size in the gas sampled and detected by the laser dust particle sensor 10 includes both large particles and small particles, the controller 30 controls the driving electromagnet 25 to start, the driving electromagnet 25 is energized to generate magnetism, the driving electromagnet 25 and the stretching magnetic block 22 are arranged with different poles, and the controller 30 controls the current passed into the driving electromagnet 25 to be different in size, and the current in the driving electromagnet 25 gradually weakens from the air supply pipe 5 to one end of the exhaust valve 29, so that the pore size generated when the polyethylene fluoride membrane 19 is stretched gradually shrinks, which can not only remove large and small impurities in the gas, but also reduce the resistance of the gas passing through the polyethylene fluoride membrane 19; The length of stretching the polyethylene fluoride membrane 19 is determined by observing the scale ruler 26 to avoid over-stretching the polyethylene fluoride membrane 19. The gas filtered by the polyethylene fluoride membrane 19 enters the exhaust box 28, and the exhaust box 28 discharges the purified gas through the exhaust valve 29, completing the filtering operation of the dust-containing gas.

[0026] Embodiment 2: This embodiment is based on the above embodiment. The chemical substances in the air need not exceed the standard. However, when the air containing chemical substances passes through the polyethylene fluoride membrane 19 for a long time, the chemical substances will continuously accumulate inside or on the surface of the polyethylene fluoride membrane 19. The chemical substances will cause chemical degradation of the membrane material, thereby reducing the filtration efficiency of the polyethylene fluoride membrane 19, so that the polyethylene fluoride membrane 19 cannot effectively intercept the target particles or gas molecules. In addition, chemical degradation will cause the tensile strength of the polyethylene fluoride membrane 19 to decrease. The controller 30 controls the current passed into the driving electromagnet 25 to be consistent. The driving electromagnet 25 absorbs the stretching magnet 22 through magnetic force. The stretching magnet 22 uses the deformation of the stretching spring 24 to stretch the polyethylene fluoride membrane 19. The polyethylene fluoride membrane 19 is observed to be at a reasonable stretching length through the scale ruler 26. When the polyethylene fluoride membrane 19 is subjected to a large degree of chemical degradation, it will break during stretching. The broken polyethylene fluoride membrane 19 is replaced to ensure the gas filtration efficiency of the polyethylene fluoride membrane 19. The above operation can be repeated the next time it is used.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] The above is a description of the present solution and its implementation methods, which is not restrictive. The drawings show only one implementation method of the present solution, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creative design without departing from the creative purpose of the present solution, they should all fall within the protection scope of the present solution.

Claims

1. An ultra-high molecular weight polyethylene fluoride membrane filtration device, comprising a filtration box (1) and a support frame (2), characterized in that: The invention also comprises a diameter-detecting gas transmission mechanism (3) and a measuring and stretching type impurity filtering mechanism (14), wherein the support frame (2) is symmetrically arranged on both sides of the filter box (1), the filter box (1) is arranged with an opening at one end, the diameter-detecting gas transmission mechanism (3) is arranged at the end of the filter box (1) away from the opening, the measuring and stretching type impurity filtering mechanism (14) is arranged inside the filter box (1), the diameter-detecting gas transmission mechanism (3) comprises an air intake mechanism (4), a particle measuring mechanism (7) and an auxiliary extraction mechanism (11), the air intake mechanism (4) is arranged on one side of the filter box (1), and the measuring and stretching type impurity filtering mechanism (14) is arranged inside the filter box (1), and the diameter-detecting gas transmission mechanism (3) comprises an air intake mechanism (4), a particle measuring mechanism (7) and an auxiliary extraction mechanism (11), the air intake mechanism (4) is arranged on one side of the filter box (1), and the measuring and stretching type impurity filtering mechanism (14) is arranged inside the filter box (1). The particle measuring mechanism (7) is arranged at one end of the filter box (1) close to the air intake mechanism (4), the auxiliary extraction mechanism (11) is arranged between the air intake mechanism (4) and the particle measuring mechanism (7), and the measuring extension type impurity filtering mechanism (14) comprises a purification mechanism (15), a flow-increasing mechanism (20) and an exhaust mechanism (27), the purification mechanism (15) is arranged on the inner wall of the filter box (1), the flow-increasing mechanism (20) is arranged on the upper wall and the bottom wall of the filter box (1), and the exhaust mechanism (27) is arranged on a side of the filter box (1) away from the air intake mechanism (4).

2. The ultra-high molecular weight polyethylene fluoride membrane filtration device according to claim 1, characterized in that: The air intake mechanism (4) comprises an air supply pipe (5) and an air intake pipe (6), wherein the air supply pipe (5) is arranged in communication with one side of the filter box (1), and the air intake pipe (6) is arranged in communication with a side of the air supply pipe (5) away from the filter box (1).

3. The ultra-high molecular weight polyethylene fluoride membrane filtration device according to claim 2, characterized in that: The particle measuring mechanism (7) comprises an auxiliary frame (8), a particle measuring box (9) and a laser dust particle sensor (10); the auxiliary frame (8) is symmetrically arranged at one end of the filter box (1) close to the air supply pipe (5); the particle measuring box (9) is arranged at a side of the auxiliary frame (8) away from the filter box (1); the laser dust particle sensor (10) is arranged at a side of the particle measuring box (9) close to the support frame (2); and a detection end of the laser dust particle sensor (10) is arranged through the interior of the particle measuring box (9).

4. The ultra-high molecular weight polyethylene fluoride membrane filtration device according to claim 3, characterized in that: The auxiliary extraction mechanism (11) comprises an air extraction pump (12) and an auxiliary extraction pipe (13); the air extraction pump (12) is symmetrically arranged at both ends of the air intake pipe (6); the air extraction end of the air extraction pump (12) is arranged to penetrate the interior of the air intake pipe (6); and the auxiliary extraction pipe (13) is arranged to communicate between a side of the particle measuring box (9) away from the laser dust particle sensor (10) and an exhaust end of the air extraction pump (12).

5. The ultra-high molecular weight polyethylene fluoride membrane filtration device according to claim 4, characterized in that: The purification mechanism (15) comprises a filter frame (16), a slide groove (17), a solid film plate (18) and a polyethylene fluoride membrane (19); a plurality of groups of the filter frames (16) are arranged on the inner wall of the filter box (1); the slide groove (17) is arranged on the inner walls of both sides of the filter frame (16); the slide groove (17) is opened on three sides; the solid film plate (18) is arranged inside the slide groove (17); and the polyethylene fluoride membrane (19) is arranged between the solid film plates (18).

6. The ultra-high molecular weight polyethylene fluoride membrane filtration device according to claim 5, characterized in that: The flow-increasing mechanism (20) comprises a stretching box (21), a stretching magnetic block (22), a stretching frame (23), a stretching spring (24), a driving electromagnet (25) and a scale ruler (26); the stretching box (21) penetrates the filter box (1) and is arranged on the upper wall and the bottom wall of the filter frame (16); the stretching magnetic block (22) is slidably arranged between the inner wall of the stretching box (21) and the slide groove (17); the stretching frame (23) is arranged on a side of the stretching box (21) away from the filter box (1); a plurality of groups of the stretching springs (24) are arranged between a side of the stretching frame (23) close to the stretching box (21) and the stretching magnetic block (22); a plurality of groups of the driving electromagnet (25) are penetrated and arranged on the inner wall of the stretching frame (23); the stretching magnetic block (22) and the driving electromagnet (25) are arranged opposite to each other; and the scale ruler (26) is arranged on the side wall of the stretching box (21).

7. The ultra-high molecular weight polyethylene fluoride membrane filtration device according to claim 6, characterized in that: The exhaust mechanism (27) comprises an exhaust box (28) and an exhaust valve (29); the exhaust box (28) is arranged in communication with a side of the filter box (1) away from the air supply pipe (5); and a plurality of groups of the exhaust valves (29) are arranged in communication with a side of the exhaust box (28) away from the filter box (1).

8. The ultra-high molecular weight polyethylene fluoride membrane filtration device according to claim 7, characterized in that: A controller (30) is provided on the side wall of the particle measuring box (9).

9. The ultra-high molecular weight polyethylene fluoride membrane filtration device according to claim 8, characterized in that: The controller (30) is electrically connected to the laser dust particle sensor (10), the air pump (12) and the driving electromagnet (25) respectively.

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