An air cleaner filter element detection device and method

Abstract

The application belongs to the technical field of filter element detection, and particularly relates to an air filter element detection device and a method thereof; the device comprises a frame, a filter element, a motorized extender installed at the center of the bottom of the frame, a plurality of elastic columns installed on the side wall of the output end of the motorized extender, arc-shaped clamping blocks connected to the elastic columns, and a movable airtight half-box arranged on the two sides of the filter element; when the filter element is placed in the frame, the output end of the motorized extender is located in the center hole of the filter element, and the moving path of the arc-shaped clamping blocks covers the hole wall of the center hole of the filter element; one of the opposite outer sides of the frame is connected with a guide slide column, and the other of the opposite outer sides of the frame is connected with a driving motor; a displacement screw is installed on the inner side of the frame; the output end of the driving motor is rotationally connected with the displacement screw; the end points of the two displacement screws are oppositely arranged; the movable airtight half-box is arranged on the two sides of the filter element; the stability during the detection of the filter element is improved, the detection accuracy of the filter element is ensured, the detection effect of the device is further improved, and the limitation of the device during use is reduced.

Description

Technical Field

[0001] This invention belongs to the field of filter element testing technology, specifically a filter element testing device and method for air filters. Background Technology

[0002] An air filter is a device that filters particulate impurities from the air. Its working principle is based on a filter medium (such as a filter element). When air passes through the filter, the filter paper blocks and adsorbs dust, sand, and other impurities, thus purifying the air. During production, to ensure quality and enhance product competitiveness, the filtration capacity of the built-in filter element is typically tested. Existing filter element testing devices usually simulate real-world scenarios using airflow, controlling airflow parameters such as velocity and pressure, and combining this with a pollutant generation and monitoring system to quantitatively test the filter element's core performance characteristics, such as filtration efficiency, resistance, and dust holding capacity. However, excessive airflow pressure can reduce the filter element's stability, easily affecting testing accuracy and thus reducing the device's testing effectiveness. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the present invention provides a filter element testing device and method for air filters, which effectively solves the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a filter element testing device for air filters, comprising a frame; a filter element; an electric telescopic device installed at the center of the bottom of the frame; a plurality of elastic columns installed on the side wall of the output end of the electric telescopic device; an arc-shaped clamping block connected to the elastic column; when the filter element is placed in the frame, the output end of the electric telescopic device is located in the central hole of the filter element, and the moving path of the arc-shaped clamping block covers the hole wall of the central hole of the filter element; a guide slide is connected to one of the relatively outer sides of the frame, and a drive motor is connected to the other relatively outer side; a displacement screw is installed on the inner side of the frame; the output end of the drive motor is rotatably connected to the displacement screw; the endpoints of the two displacement screws are arranged opposite to each other; movable... The system comprises two movable, sealed semi-boxes; these semi-boxes are located within the opposite ends of two displacement screws, with their openings facing the filter element; each displacement screw is equipped with a fixed-position precision measuring device for fixing the filter element before testing; the fixed-position precision measuring device includes a displacement base block threadedly connected to the displacement screw; each sealed semi-box is equipped with a multi-control dust removal unit for self-cleaning the testing area after testing; the multi-control dust removal unit includes a first base fixedly connected to the top of the sealed semi-box; a trigger energy reduction component is provided on the guide slide column for reducing the impact force on the testing area during testing; the trigger energy reduction component includes a guide slider; the guide slide column is connected through the guide slider near the frame side; the guide slider and the guide slide column are in sliding engagement.

[0005] A displacement cylinder is fixedly connected to a displacement base block; the displacement cylinder and the frame are connected through the frame and are slidably fitted together; L-shaped columns are installed on both sides of the displacement base block;

[0006] Pressure cylinders are installed on the side of the sealed half-box away from the filter element; two pressure cylinders are connected by a displacement plate, which slides together; a pressure limiting plate is connected to the end of the pressure cylinder away from the sealed half-box; two L-shaped cylinders are connected together to the side of the displacement plate away from the filter element; signal patches are provided on the opposite surfaces of the displacement plate and the sealed half-box; the two signal patches are electrically connected.

[0007] A pressure spring is sleeved on a pressure cylinder; one end of the pressure spring is fixedly connected to a pressure limiting plate, and the other end is fixedly connected to a displacement horizontal plate; a displacement rack is also installed on the displacement horizontal plate.

[0008] Preferably, the top and bottom of the sealed half-box are provided with pressure semi-circular grooves extending into their interiors; when the two sealed half-boxes merge and contact each other, a closed cavity is formed inside the two sealed half-boxes. At this time, the pressure semi-circular grooves on the two sealed half-boxes merge into a complete circle, and the top and bottom of the sides of the sealed half-boxes contact the top and bottom of the outer wall of the filter element; so that the filter material layer on the filter element is located in the closed cavity; a blocking block is also installed at the output end of the electric telescopic device, and the blocking block is positioned lower than the arc-shaped clamp; the size of the blocking block is larger than the pressure semi-circular groove; when the two sealed half-boxes merge, the blocking block is used to block the pressure semi-circular groove that has merged into a complete circle; a fan is installed on the side of the sealed half-box away from the filter element, and its output end faces the filter material layer; a smoke generator is also connected to the fan; a detector is installed at the top of the frame; the detector is located above the pressure semi-circular groove that has merged into a complete circle.

[0009] Preferably, it includes a drive shaft that is connected through to the first base, and the two are rotatably engaged; the outer wall of the drive shaft is parallel to the top of the sealed half-box; one end of the drive shaft is connected to a first pulley, and the other end is connected to a drive turntable;

[0010] The drive column is connected to the edge of the drive turntable away from the drive shaft;

[0011] The second base is installed on top of the first base; the second base has a through drive slide column on the side near the top of the sealed half-box; the drive slide column and the second base are slidably engaged.

[0012] Preferably, a drive cross block is installed on the drive slide column; the drive cross block is located on the side of the drive turntable away from the drive shaft; the drive cross block is provided with a through drive groove on the side near the drive turntable; the drive column is located in the drive groove, and the two slide in cooperation; an extension square column is installed on the drive cross block; the extension square column passes through the top of the sealed half box and a scraper is installed at one end extending into its interior; the scraper is in contact with the inner wall of the sealed half box.

[0013] Preferably, a displacement shaft is installed on the side wall of the sealed half-box; a displacement gear is connected to the displacement shaft; the displacement gear is meshed with a displacement rack; a second pulley is connected to the end of the displacement shaft away from the sealed half-box; a transmission belt is connected to the second pulley; a first pulley is connected to the transmission belt; the transmission belt and the first pulley are in sliding engagement with the second pulley.

[0014] Preferably, it includes a third base mounted on the guide slider; an actuating plate is mounted on the third base;

[0015] A guide spring is sleeved on a guide slide post; one end of the guide spring is connected to a guide limiting plate; the guide limiting plate is connected to the end of the guide slide post away from the frame; the other end of the guide spring is connected to a guide slider.

[0016] An energy-absorbing square tube is installed on the side of the touch plate near the sealed half-box; an energy-absorbing square column is slidably connected inside the energy-absorbing square tube; a closed half-frame is installed on the energy-absorbing square column; a sealing gasket is installed on the inner wall of the closed half-frame;

[0017] An energy-absorbing spring is located inside the energy-absorbing square tube; one end of the energy-absorbing spring is fixedly connected to the energy-absorbing square column, and the other end is fixedly connected to the inner wall of the energy-absorbing square tube.

[0018] Preferably, the closed half-frame and the sealed half-box have the same shape; the inner wall of the closed half-frame fits the outer wall of the sealed half-box; when the two sealed half-boxes are combined, the joint between them is located on the moving path of the sealing gasket; the guide slide is provided with several through locking slots; the displacement cross plate and the side of the sealed half-box are provided with retention holes; a retention rod is installed on the touch plate; when the two sealed half-boxes are combined and in contact, the retention holes are located on the moving path of the retention rod.

[0019] Preferably, a locking cylinder is installed on the third base; a locking cross plate is connected through the locking cylinder, and the two are slidably engaged; a locking spring is sleeved on the locking cylinder; one end of the locking spring is fixedly connected to the third base, and the other end is fixedly connected to the locking cross plate; a locking block is installed on the locking cross plate; the locking block passes through the guide slider and is connected to one of the locking slots.

[0020] The present invention also provides a method for testing air filter elements, comprising the following steps:

[0021] S1. Operate the fixed-position precision measuring device to make the two sealed half-boxes come into contact with each other to form a closed cavity. At this time, the filter material on the filter element is located in the closed cavity.

[0022] S2. The test flue gas is collected in the closed cavity and filtered by the filter material. The filtered flue gas will flow out through the central hole.

[0023] S3. The filter element can be tested by detecting the concentration of flue gas flowing out of the central hole.

[0024] As can be seen from the above, the filter element testing device for air filters provided by the present invention improves the stability of filter element testing, ensures the testing accuracy of filter elements, further improves the testing effect of the device, and reduces the limitations of the device in use. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0026] In the attached diagram:

[0027] Figure 1 This is a front view of the framework structure of the present invention;

[0028] Figure 2 This is a cross-sectional view of the sealed semi-box of the present invention;

[0029] Figure 3 This is a schematic diagram of the displacement transverse plate structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the trigger plate structure of the present invention;

[0031] Figure 5 This is a front sectional view of the filter element of the present invention;

[0032] Figure 6 This is a cross-sectional view of the energy-absorbing square tube of the present invention;

[0033] Figure 7 This is a front sectional view of the sealing circular block of the present invention;

[0034] Figure 8 This is a schematic diagram of the displacement rack structure of the present invention;

[0035] Figure 9 This is a schematic diagram of the locking slot structure of the present invention;

[0036] Figure 10 This is a cross-sectional view of the arc-shaped clamping block of the present invention;

[0037] Figure 11 This is a closed half-frame side view of the present invention;

[0038] Figure 12 This is a cross-sectional view of the fan of the present invention;

[0039] Figure 13 This is an exploded view of the retaining rod of the present invention;

[0040] In the diagram: 1. Frame; 2. Filter element; 3. Electric telescopic device; 4. Elastic column; 5. Arc-shaped clamp; 6. Guide slide column; 7. Drive motor; 8. Displacement screw; 9. Sealed half-box; 10. Displacement base block; 11. First base; 12. Guide slider; 13. Displacement cylinder; 14. Pressure cylinder; 15. Displacement cross plate; 16. Signal patch; 17. Pressure spring; 18. Displacement rack; 19. Sealing block; 20. Fan; 21. Smoke generator; 22. Detector; 23. Drive shaft; 24. First pulley; 25. Drive turntable; 26. Drive 27. Moving column; 28. Second base; 29. ​​Drive slide column; 30. Drive cross block; 31. Drive slide groove; 32. Extended square column; 33. Scraper; 34. Displacement shaft; 35. Displacement gear; 36. Second pulley; 37. Transmission belt; 38. Touch plate; 39. Guide spring; 40. Energy-absorbing square cylinder; 41. Energy-absorbing square column; 42. Closed half frame; 43. Sealing gasket; 44. Energy-absorbing spring; 45. Locking slot; 46. Locking cylinder; 47. Locking cross plate; 48. Locking spring; 49. Locking insert; 50. Fixing insertion hole; 61. Fixing rod. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0042] Implementation examples, by Figures 1 to 13The present invention includes a frame 1; a filter element 2; an electric telescopic device 3 installed at the center of the bottom of the frame 1; several elastic columns 4 installed on the side wall of the output end of the electric telescopic device 3; arc-shaped clamping blocks 5 connected to the elastic columns 4; when the filter element 2 is placed in the frame 1, the output end of the electric telescopic device 3 is located in the central hole of the filter element 2, and the moving path of the arc-shaped clamping blocks 5 covers the hole wall of the central hole of the filter element 2; guide slides 6 are connected to one of the relatively outer sides of the frame 1, and drive motors 7 are connected to the other relatively outer side; displacement screws 8 are installed on the inner side of the frame 1; the output end of the drive motor 7 is rotatably connected to the displacement screws 8; the endpoints of the two displacement screws 8 are arranged opposite to each other; the filter element 2 is provided with... There is a movable sealed half-box 9; the two sealed half-boxes 9 are located inside the opposite ends of the two displacement screws 8, and their openings face the filter element 2; a fixed position precision measuring device is provided on the displacement screw 8 for fixing the filter element 2 for testing; the fixed position precision measuring device includes a displacement base block 10, which is threadedly connected to the displacement screw 8; a displacement cylinder 13, which is fixedly connected to the displacement base block 10; the displacement cylinder 13 and the frame 1 are connected through and slidably fitted; L-shaped columns are installed on both sides of the displacement base block 10; a pressure cylinder 14 is installed on the side of the sealed half-box 9 away from the filter element 2; a displacement cross plate 15 is connected through the two pressure cylinders 14 and slidably fitted; the pressure cylinder 14 is away from the sealed half-box 9. One end is connected to a pressure limiting plate; two L-shaped columns are connected together to the side of the displacement plate 15 away from the filter element 2; signal patches 16 are provided on the opposite sides of the displacement plate 15 and the sealed half-box 9; the two signal patches 16 are electrically connected; a pressure spring 17 is sleeved on the pressure cylinder 14; one end of the pressure spring 17 is fixedly connected to the pressure limiting plate, and the other end is fixedly connected to the displacement plate 15; a displacement rack 18 is also installed on the displacement plate 15; the top and bottom of the sealed half-box 9 are provided with pressure semi-circular grooves that penetrate into their interiors; when the two sealed half-boxes 9 are combined and in contact, a closed cavity is formed inside the two sealed half-boxes 9, at which time the pressure semi-circular grooves on the two sealed half-boxes 9 merge into a complete circle, and The top and bottom of the side of the sealed half-box 9 are in contact with the top and bottom of the outer wall of the filter element 2, so that the filter material layer on the filter element 2 is located in the closed cavity; a blocking block 19 is also installed at the output end of the electric telescopic device 3, and the blocking block 19 is located below the arc-shaped clamp 5; the size of the blocking block 19 is larger than the pressure semi-circular groove; when the two sealed half-boxes 9 are merged, the blocking block 19 is used to block the pressure semi-circular groove that has merged into a whole circle; a fan 20 is installed on the side of the sealed half-box 9 away from the filter element 2, and its output end faces the filter material layer; a smoke generator 21 is also connected to the fan 20; a detector 22 is installed at the top inside the frame 1; the detector 22 is located above the pressure semi-circular groove that has merged into a whole circle;

[0043] The filter element 2 to be tested is placed inside the frame 1, and the center hole of the filter element 2 is positioned on the output end of the electric telescopic device 3. By operating the elastic column 4, the arc-shaped clamping block 5 on it is made to fit against the inner wall of the center hole of the filter element 2, thus self-centering and clamping the filter element 2, preventing it from shaking or dislodging during testing and affecting the test results. At the same time, by controlling the electric telescopic device 3, the height of the filter element 2 can be controlled, making it adaptable to different testing scenarios and reducing the testing limitations of the device. At this time, by starting the two drive motors 7, they drive the displacement screw 8 to rotate, so that the threaded sealed half box 9 moves closer to the filter element. 2. Movement: The two sealed half-boxes 9 move relative to each other until they contact each other. The top and bottom sides of the sealed half-boxes 9 contact the top and bottom of the outer wall of the filter element 2, further fixing and clamping the filter element 2 to prevent it from shaking during use and affecting its detection accuracy, thus improving the detection stability of the filter element 2. Simultaneously, after the two sealed half-boxes 9 are joined, a closed cavity is formed inside. The filter material layer on the filter element 2 is located within this closed cavity, and the pressure semi-circular groove at the bottom of the sealed half-boxes 9 is sealed by the blocking block 19. By starting the fan 20, its output end applies wind and airflow to the filter material on the filter element 2. Test flue gas is generated by the smoke generator 21 and sent to the filter material by the fan 20. Since the two sealed semi-boxes 9 only have one top outlet, namely the pressure semi-circular groove, the flue gas flow acting on the filter material of the filter element 2 can only flow out through the top pressure semi-circular groove and act on the detector 22, thus detecting the filter element's filtration capacity. At the same time, the flue gas and airflow can only be concentrated in the closed cavity to prevent escape and affect the detection accuracy. The gas pressure only acts on the filter material to detect the filtration capacity of the filter element 2, thus completing the filter element test. The filter element 2 is used for quantitative testing of its core performance characteristics such as filtration efficiency, resistance, and dust holding capacity. Simultaneously, the filter element 2 to be tested is initially self-centering and clamped, and further secured by the merging of two sealed semi-boxes 9. This ensures that the filter material is located within a closed cavity for testing, preventing the filter element 2 from dislodging or shaking even under high airflow pressure. This avoids excessive airflow pressure affecting the filter element 2 and reducing its stability, thus improving the stability of the filter element 2 during testing, ensuring the testing accuracy of the filter element 2, further enhancing the testing effect of the device, and reducing the limitations of the device in use.

[0044] It is worth mentioning that after the two sealed half-boxes 9 are docked, the displacement base block 10 continues to move, causing the displacement plate 15 on it to move at the pressure cylinder 14, so that the pressure spring 17 is in a buffer state until the signal patches 16 on the opposite surfaces of the displacement plate 15 and the sealed half-boxes 9 are in contact. This indicates that the two sealed half-boxes 9 have completed the docking and merging operation. This avoids gaps caused by the two sealed half-boxes 9 not being fully docked, which would lead to the loss of airflow used for testing and increase the energy consumption of the device during testing. This also avoids affecting the testing of the filter element 2, thus ensuring the testing results and accuracy of the device for the filter element. At the same time, if the signal patches 16 are no longer in contact, it indicates that the two sealed half-boxes 9 have become displaced, which can be promptly notified to the staff to avoid affecting the testing results and improve the testing effect of the device. Meanwhile, the buffering force brought by the pressure spring 17 can reduce the impact force on the sealed half-boxes 9 during use, and prevent the impact force caused by shaking due to non-human factors during the docking and contact process from damaging the sealed half-boxes 9, thereby improving the stability of the sealed half-boxes 9 during use.

[0045] In this embodiment, a multi-stage dust removal unit is provided on the sealed half-box 9 for self-cleaning the detection area after the detection is completed. The multi-stage dust removal unit includes a first base 11, which is fixedly connected to the top of the sealed half-box 9; a drive shaft 23, which is connected through the first base 11 and the two are rotatably engaged; the outer wall of the drive shaft 23 is parallel to the top of the sealed half-box 9; one end of the drive shaft 23 is connected to a first pulley 24, and the other end is connected to a drive turntable 25; a drive column 26 is connected to the edge of the drive turntable 25 away from the drive shaft 23; a second base 27 is installed on the top of the first base 11; a through drive slide column 28 is provided on the side of the second base 27 near the top of the sealed half-box 9; the drive slide column 28 and the second base 27 are slidably engaged; a drive cross block 29 is installed on the drive slide column 28; the drive cross block 29 is located at the top of the drive shaft 25. The rotating disk 25 is located away from the drive shaft 23; the drive block 29 is provided with a through drive groove 30 on the side near the drive disk 25; the drive column 26 is located in the drive groove 30, and the two are slidably engaged; an extended square column 31 is installed on the drive block 29; the extended square column 31 passes through the top of the sealed half-box 9 and extends to one end inside it, where a scraper 32 is installed; the scraper 32 is in contact with the inner wall of the sealed half-box 9; a displacement shaft 33 is installed on the side wall of the sealed half-box 9; a displacement gear 34 is connected to the displacement shaft 33; the displacement gear 34 is meshed with the displacement rack 18; a second pulley 35 is connected to the end of the displacement shaft 33 away from the sealed half-box 9; a transmission belt 36 is connected to the second pulley 35; a first pulley 24 is connected to the transmission belt 36; the transmission belt 36 and the first pulley 24 are slidably engaged with the second pulley 35.

[0046] When the two sealed half-boxes 9 come into contact, the displacement plate 15 gradually approaches the sealed half-box 9, causing the displacement rack 18 on the displacement plate 15 to move, thus engaging the displacement gear 34 to rotate. Under the transmission of a series of components, the drive turntable 25 rotates, causing the drive column 26 on it to move back and forth within the drive slide groove 30. This causes the drive block 29 on it to move back and forth at the second base 27 via the drive slide column 28. Under the action of the extended square column 31, the drive block 29 drives the scraper 32 to reciprocate within the sealed half-box 9. Since the scraper 32 is in contact with the inside of the sealed half-box 9... The wall contact allows for the scraping and cleaning of impurities adhering to the sealed half-box 9. This cleaning process is performed before and after the device tests the filter element 2, preventing excessive impurities from affecting the flow rate of the fan 20. It also prevents excessive impurities from causing changes in testing conditions during subsequent tests, ensuring that the filter element 2 is tested in a low-pollution, clean, and low-impurity state within the closed cavity. This avoids significant differences in testing environments when testing different filter elements 2, which could compromise the accuracy of the test results. As a result, the device's testing effect and accuracy are greatly improved.

[0047] In this embodiment, the guide slide 6 is provided with a touch energy reduction component to reduce the impact force on the detection area during detection. The touch energy reduction component includes a guide slider 12; the guide slide 6 is connected through the guide slider 12 to the side near the frame 1; the guide slider 12 and the guide slide 6 are slidably engaged; a third base is installed on the guide slider 12; a touch plate 37 is installed on the third base; a guide spring 38 is sleeved on the guide slide 6; one end of the guide spring 38 is connected to a guide limiter. A guide plate; a guide limiting plate is connected to the end of the guide slide column 6 away from the frame 1; the other end of the guide spring 38 is connected to the guide slider 12; an energy-absorbing square tube 39 is installed on the side of the touch plate 37 near the sealed half box 9; an energy-absorbing square column 40 is slidably connected inside the energy-absorbing square tube 39; a closed half frame 41 is installed on the energy-absorbing square column 40; a sealing gasket 42 is installed on the inner wall of the closed half frame 41; an energy-absorbing spring 43 is located inside the energy-absorbing square tube 39; one end of the energy-absorbing spring 43 is fixedly connected to the energy-absorbing square column 40, and the other end... One end is fixedly connected to the inner wall of the energy-absorbing square tube 39; the closed half-frame 41 has the same shape as the sealed half-box 9; the inner wall of the closed half-frame 41 fits into the outer wall of the sealed half-box 9; when the two sealed half-boxes 9 are combined, the joint between them is located in the moving path of the sealing gasket 42; the guide slide 6 is provided with several through locking slots 44; the displacement horizontal plate 15 and the side of the sealed half-box 9 are provided with fixing holes 49; the touch plate 37 is equipped with a fixing rod 50; when the two sealed half-boxes 9 are combined and in contact... The fixing hole 49 is located in the moving path of the fixing rod 50; a locking cylinder 45 is installed on the third base; a locking cross plate 46 is connected through the locking cylinder 45 and the two are slidably engaged; a locking spring 47 is sleeved on the locking cylinder 45; one end of the locking spring 47 is fixedly connected to the third base and the other end is fixedly connected to the locking cross plate 46; a locking block 48 is installed on the locking cross plate 46; the locking block 48 passes through the guide slider 12 and is connected to one of the locking slots 44.

[0048] When the device is testing filter element 2, the two sealed half-boxes 9 have been docked, so that the filter material on filter element 2 is located in the closed cavity. At this time, by pulling the locking plate 46 outward, it is limited to move at the locking cylinder 45, so that the locking spring 47 is in a buffer state. Then, the locking block 48 on the locking plate 46 disengages from the guide slider 12 and is no longer in contact with the locking slot 44, releasing the limiting setting on the guide slider 12. By pushing the guide slider 12 relative to each other, the contact plates 37 on it are all close to the guide slider 12. The movement of the sealed half-box 9 causes the two actuating plates 37 to move relative to each other. Under the action of the energy-absorbing square tube 39, the energy-absorbing spring 43, and the energy-absorbing square column 40, the sealed half-frame 41 moves closer to the joint of the two sealed half-boxes 9 and makes contact. This further fixes the two sealed half-boxes 9 after they are joined, preventing the sealed half-frame 41 from displacing during the testing process and affecting the testing of the filter element 2, thus reducing the limitations of the device in use. At the same time, it also makes the sealing gasket 42 on the sealed half-frame 41 contact the two sealed half-boxes 9. The contact at the joint seam increases the sealing performance of the two sealed half-boxes 9 when they are joined, preventing the test gas from escaping due to gaps in the closed cavity and affecting the test results. This ensures and improves the detection accuracy of the device. Furthermore, the buffering force provided by the energy-absorbing spring 43 reduces the impact force on the sealed half-boxes 9 caused by non-human factors during the test, improving the stability of the sealed half-boxes 9 during use. This prevents the two sealed half-boxes 9 from dislodging or shaking during the test of the filter element 2 after joining, thus extending the service life of the filter element 2 and improving the detection accuracy, thereby enhancing the detection effect of the device. At the same time, when the touch plate 37 moves, it also moves the fixing rod 50 on it, causing it to enter the fixing hole 49, which further limits the displacement plate 15 and the sealed half-boxes 9. This prevents the sealed half-boxes 9 from dislodging during the test of the filter element 2, affecting the test process and results, further improving the safety of the device during use and reducing its limitations.

[0049] It is worth mentioning that after the two closed half-frames 41 are connected to the docking points of the two sealed half-boxes 9, by releasing the locking plate 46, the locking spring 47 can be reset to move the locking plug 48 back to its original position, so that it passes through the guide slider 12 and connects with one of the locking slots 44. This limits the position of the guide slider 12, preventing the closed half-frames 41 from dislodging during use or from moving due to non-human factors, thus affecting the fixing or buffering effect of the sealed half-boxes 9 and improving the effectiveness of the device.

[0050] The present invention also provides a method for testing air filter elements, comprising the following steps:

[0051] S1. Operate the fixed-position precision measuring device to make the two sealed half-boxes 9 connect to form a closed cavity. At this time, the filter material on the filter element 2 is located in the closed cavity.

[0052] S2. The test flue gas is collected in the closed cavity and filtered by the filter material. The filtered flue gas will flow out through the central hole.

[0053] S3. The detection operation of filter element 2 can be completed by detecting the concentration of flue gas flowing out of the central hole.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A filter element testing device for air filters, comprising a frame; a filter element; characterized in that: An electric telescopic device is installed at the center of the bottom of the frame; several elastic columns are installed on the side wall of the output end of the electric telescopic device; arc-shaped clamps are connected to the elastic columns; when the filter element is placed in the frame, the output end of the electric telescopic device is located in the central hole of the filter element, and the moving path of the arc-shaped clamps covers the hole wall of the central hole of the filter element; one of the outer sides of the frame is connected to a guide slide column, and the other outer side is connected to a drive motor; a displacement screw is installed on the inner side of the frame; the output end of the drive motor is rotatably connected to the displacement screw; the endpoints of the two displacement screws are set opposite to each other; movable sealed half-boxes are provided on both sides of the filter element; the two sealed half-boxes are located on the two displacement screws. Within the opposite endpoints, and with all openings facing the filter element; a fixed-position precision measuring device is provided on the displacement screw for fixing the filter element before testing; the fixed-position precision measuring device includes a displacement base block threadedly connected to the displacement screw; a multi-control dust removal unit is provided on the sealed half-box for self-cleaning the testing area after testing; the multi-control dust removal unit includes a first base fixedly connected to the top of the sealed half-box; a touch energy reduction component is provided on the guide slide column for reducing the impact force on the testing area during testing; the touch energy reduction component includes a guide slider; the guide slide column is connected through the guide slider near the frame side; the guide slider and the guide slide column slide in cooperation; A third base is mounted on the guide slider; an actuating plate is mounted on the third base. A guide spring is sleeved on a guide slide post; one end of the guide spring is connected to a guide limiting plate; the guide limiting plate is connected to the end of the guide slide post away from the frame; the other end of the guide spring is connected to a guide slider. An energy-absorbing square tube is installed on the side of the touch plate near the sealed half-box; an energy-absorbing square column is slidably connected inside the energy-absorbing square tube; a closed half-frame is installed on the energy-absorbing square column; a sealing gasket is installed on the inner wall of the closed half-frame; An energy-absorbing spring is located inside the energy-absorbing square tube; one end of the energy-absorbing spring is fixedly connected to the energy-absorbing square column, and the other end is fixedly connected to the inner wall of the energy-absorbing square tube. The closed half-frame and the sealed half-box have the same shape; the inner wall of the closed half-frame fits the outer wall of the sealed half-box; when the two sealed half-boxes are combined, the joint between them is located on the moving path of the sealing gasket; the guide slide is provided with several through locking slots; the displacement cross plate and the side of the sealed half-box are provided with retention holes; a retention rod is installed on the touch plate; when the two sealed half-boxes are combined and in contact, the retention holes are located on the moving path of the retention rod. A locking cylinder is installed on the third base; a locking cross plate is connected through the locking cylinder, and the two are slidably engaged; a locking spring is sleeved on the locking cylinder; one end of the locking spring is fixedly connected to the third base, and the other end is fixedly connected to the locking cross plate; a locking block is installed on the locking cross plate; the locking block passes through the guide slider and is connected to one of the locking slots.

2. The air filter element testing device according to claim 1, characterized in that: It includes a displacement cylinder, which is fixedly connected to the displacement base block; the displacement cylinder and the frame are connected through the frame and are slidably fitted together; L-shaped columns are installed on both sides of the displacement base block; Pressure cylinders are installed on the side of the sealed half-box away from the filter element; two pressure cylinders are connected by a displacement plate, which slides together; a pressure limiting plate is connected to the end of the pressure cylinder away from the sealed half-box; two L-shaped cylinders are connected together to the side of the displacement plate away from the filter element; signal patches are provided on the opposite surfaces of the displacement plate and the sealed half-box; the two signal patches are electrically connected. A pressure spring is sleeved on a pressure cylinder; one end of the pressure spring is fixedly connected to a pressure limiting plate, and the other end is fixedly connected to a displacement horizontal plate; a displacement rack is also installed on the displacement horizontal plate.

3. The air filter element testing device according to claim 2, characterized in that: The top and bottom of each sealed half-box are provided with pressure semi-circular grooves extending into their interiors. When the two sealed half-boxes merge and come into contact, a closed cavity is formed inside the two sealed half-boxes. At this time, the pressure semi-circular grooves on the two sealed half-boxes merge into a complete circle, and the top and bottom of the sides of the sealed half-boxes contact the top and bottom of the outer wall of the filter element, so that the filter material layer on the filter element is located inside the closed cavity. A blocking block is also installed at the output end of the electric telescopic device. The blocking block is positioned lower than the arc-shaped clamp. The size of the blocking block is larger than the pressure semi-circular groove. When the two sealed half-boxes merge, the blocking block is used to block the pressure semi-circular groove that has merged into a complete circle. A fan is installed on the side of the sealed half-box away from the filter element, and its output end faces the filter material layer. A smoke generator is also connected to the fan. A detector is installed at the top of the frame. The detector is located above the pressure semi-circular groove that has merged into a complete circle.

4. The filter element testing device for air filters according to claim 3, characterized in that: It includes a drive shaft that is connected through to the first base, and the two are rotatably engaged; the outer wall of the drive shaft is parallel to the top of the sealed half-box; one end of the drive shaft is connected to a first pulley, and the other end is connected to a drive turntable; The drive column is connected to the edge of the drive turntable away from the drive shaft; The second base is installed on top of the first base; the second base has a through drive slide column on the side near the top of the sealed half-box; the drive slide column and the second base are slidably engaged.

5. The filter element testing device for air filters according to claim 4, characterized in that: A drive cross block is installed on the drive slide column; the drive cross block is located on the side of the drive turntable away from the drive shaft; the drive cross block is provided with a through drive groove on the side near the drive turntable; the drive column is located in the drive groove, and the two slide in cooperation; an extension square column is installed on the drive cross block; the extension square column passes through the top of the sealed half box and extends to one end inside it, where a scraper is installed; the scraper is in contact with the inner wall of the sealed half box.

6. The filter element testing device for air filters according to claim 5, characterized in that: A displacement shaft is installed on the side wall of the sealed half-box; a displacement gear is connected to the displacement shaft; the displacement gear meshes with a displacement rack; a second pulley is connected to the end of the displacement shaft away from the sealed half-box; a transmission belt is connected to the second pulley; a first pulley is connected to the transmission belt; the transmission belt and the first pulley slide in cooperation with the second pulley.

7. A method for testing air filter elements, using the air filter element testing device as described in claim 1, characterized in that, Including the following steps: S1. Operate the fixed-position precision measuring device to make the two sealed half-boxes come into contact with each other to form a closed cavity. At this time, the filter material on the filter element is located in the closed cavity. S2. The test flue gas is collected in the closed cavity and filtered by the filter material. The filtered flue gas will flow out through the central hole. S3. The filter element can be tested by detecting the concentration of flue gas flowing out of the central hole.

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