Detection device and detection method of air filter

Abstract

The invention relates to a detection device and a detection method of an air filter, which are applied to the field of quality detection, during detection, a lead screw is matched with a detection piece, the integrity of a filter element is pre-detected through wind speed uniformity, and then a smoke dust test is started; detecting whether nodes which are suddenly increased appear or not by using a movable detection piece so as to judge whether the filter element has non-penetrating cracks or not; after detection, automatic cleaning is achieved through a dust collector and a rotatable sealing plate, an electric extension rod is adopted for adjusting an eccentric sealing plate for dynamic sealing compensation according to filters of different sizes, the device further comprises a stirring piece for accelerating smoke flocculation and sedimentation, and a detection control system achieves automatic operation; the problems of damage interference, residual smoke influence, poor size adaptability and the like in traditional detection are effectively solved, and the detection precision and efficiency are remarkably improved.

Description

Technical Field

[0001] The invention relates to a detection device for an air filter, and in particular to a detection device and a detection method for an air filter applied in the field of quality detection. Background Art

[0002] Air filters remove particulate matter and gaseous pollutants from the air through physical interception, adsorption or electrostatic effects. They are important components for ensuring equipment performance, maintaining production safety and improving environmental quality. After production is completed and before they are put into use on the market, they need to be quality inspected.

[0003] The specification of Chinese invention patent CN118817567B discloses a filtration performance testing platform based on an air filter element, which is suitable for placing air filter element bodies of different models, facilitates automatic real-time detection of wind speed and PM2.5 index under the filter element, and efficiently detects whether the filtration performance of the air filter element body is qualified.

[0004] The specification of Chinese invention patent CN114689481A discloses a multi-angle controllable quality inspection hoisting device for air filter production, which prevents smoke leakage and improves the accuracy of detection. It has a simple structure and is easy to operate. It solves the problems of inaccurate detection structure and high intensity of manual detection, and is economical and practical.

[0005] During testing, the existing filter testing equipment applies a top-down airflow with smoke and dust above the filter, and judges the filtering performance of the filter by detecting the wind force and smoke and dust conditions below the filter. Usually, the wind force and filtering performance are positively correlated, and the amount of smoke and dust is negatively correlated with the filtering performance. However, in actual operation, if the filter element in the filter is damaged, there will be strong wind force and a large amount of smoke and dust below the filter during testing, which will interfere with the detection accuracy of the filter. In addition, at the end of the previous round of testing and the filter was damaged in the previous round of testing, the filter detection area needs to be cleaned of smoke and dust to avoid interference in subsequent testing. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to improve the detection accuracy and detection comprehensiveness of the filter detection device and detect the damage and potential damage on the surface of the filter element during detection.

[0007] In order to solve the above problems, the present invention provides an air filter detection device for detecting the performance of a filter carrying a suction component, comprising a detection chamber, a smoke generator is installed on the top wall of the detection chamber, four hydraulic telescopic rods are installed on the bottom wall of the detection chamber, and the power ends of the four hydraulic telescopic rods are connected to an experimental frame, the inside of the experimental frame stores water mixed with a flocculant, the inner wall of the experimental frame is rotatably connected to a lead screw, a moving block is threadedly sleeved on the surface of the lead screw, a detection member composed of a wind speed sensor and a PM2.5 sensor is installed on the top of the moving block, a hose with a tail end extending to the outer wall of the detection chamber is installed through the inner wall of one side of the experimental frame, a vacuum cleaner is installed on the inner wall of one side of the detection chamber, and the input end of the vacuum cleaner is connected to a tail end extending to the inside of the experimental frame; Electric slide rails are installed on both inner walls of the detection chamber, and the inner part of the electric slide rails is slidably connected with a clamping moving block for clamping the filter; A closing component is installed on the front side of the experimental frame, and the closing component includes a No. 3 motor. The output end of the No. 3 motor is connected to a sealing plate, and the cross-sectional area of ​​the sealing plate is larger than the opening area of ​​the experimental frame. The bottom of the sealing plate is in contact with the top surface of the experimental frame.

[0008] In the above-mentioned air filter detection device, during detection, the integrity of the filter element is first pre-checked through wind speed uniformity, and then the smoke test is started. During the smoke test, the filter element can also be tested for non-penetrating cracks. After the detection, the vacuum cleaner and the rotatable sealing plate are used to automatically clean the filter element, which significantly improves the detection accuracy and efficiency.

[0009] As a further improvement of the present application, two rotating rods are installed on the surfaces of the two clamping blocks that are close to each other, and the surfaces of the two rotating rods are sleeved with mutually meshing gear parts, and the surfaces of the two rotating rods on the surface of each clamping block are also installed with arc-shaped clamping plates, and a No. 1 motor is installed inside each clamping block, and the output end of each No. 1 motor is connected to the end of one of the two rotating rods on the surface of the clamping block.

[0010] As a further improvement of the present application, the sealing plate is placed parallel to the electric slide rail in an initial state, and there is a gap between the side wall of the sealing plate and the surface of the arc-shaped clamping plate in the initial state.

[0011] As a further improvement of the present application, a No. 2 motor is installed on an outer wall of one side of the experimental frame, and an output end of the No. 2 motor is connected to the end of the lead screw.

[0012] As a further improvement of the present application, a filter is installed inside the hose, a number of agitators are installed on the bottom wall of the experimental frame, a small electric push rod is installed on the inner wall of the agitator, the power end of the small electric push rod slides through the top of the agitator and is connected to a circular plate with a diameter larger than the outer diameter of the agitator.

[0013] As a further improvement of the present application, it also includes a detection and control system, which also includes an analysis module, a data collection module, a cleaning module and a clamping module. The analysis module is used to analyze the experimental data collected by the data collection module. The data collection module is connected to the detection part signal to collect the detection data of the detection part. The cleaning module is connected to the No. 3 motor and the vacuum cleaner signal to extract and clean the smoke and dust in the experimental frame after the experiment. The clamping module is used to clamp the constraint filter.

[0014] As another improvement of the present application, the output end of the No. 3 motor is connected to a replacement part, which includes a No. 1 shaft rod, the top end of the No. 1 shaft rod is fixedly connected to a horizontal electric extension rod, the power end surface of the electric extension rod is connected to a vertically arranged No. 2 shaft rod, the top end of the No. 2 shaft rod is fixedly connected to the bottom of the sealing plate, and the connection point between the No. 1 shaft rod and the electric extension rod is located on the surface of the fixed end of the electric extension rod close to the movable end.

[0015] As another improvement supplement of the present application, the detection and control system also includes a parameter input module and a calculation module. The parameter input module is used to input the size parameters of the filter, and the calculation module is used to calculate the adjustment value of the electric extension rod when there is a difference between the width of the filter and the width of the test frame, so that the sealing plate after rotating 90 degrees can seal the gap between the test frame and the filter.

[0016] As another improvement of the present application, a detection method comprises the following steps: S1. When testing, use the clamping block to clamp the filter, and then move the clamped filter to the top of the test frame with the help of the electric slide rail; S2. Use the hydraulic telescopic rod to lift the test frame so that the top of the test frame fits tightly with the bottom surface of the filter; S3, when the cross-sectional width of the test frame is smaller than the filter cross-sectional width of the filter, start the suction assembly and the second motor first. At this time, the dust amount in the test frame is within the set threshold range. Use the detection part to move and detect the wind force under the entire filter to see if it is uniform. Check whether the filter element in the filter is damaged. If it is damaged, the detection ends. Otherwise, proceed to S4. S31. If the cross-sectional width of the test frame is greater than the filter cross-sectional width of the filter, the electric extension rod is used to adjust the center position of the sealing plate before rotation, so that the sealing plate after subsequent rotation can fill the gap between the filter and the test frame; S4, start the suction component and the smoke generator, control the smoke generator to output a smoke particle size larger than the filter size of the filter, and check the test data of the test piece; S5. After the test is completed, the filter in the clamped state is moved out of the test chamber, and then the sealing plate is rotated until the sealing plate covers the opening of the test frame, and the vacuum cleaner is started to suck out the residual smoke and dust in the test frame, waiting for the next round of test operation.

[0017] To summarize, during the inspection, the screw and the detection part are used to pre-check the integrity of the filter element through the wind speed uniformity, and then the smoke test is started. In the smoke test, the moving detection part is used to detect whether there is a sudden increase in nodes to determine whether there are non-penetrating cracks in the filter element; after the inspection, the vacuum cleaner and the rotatable sealing plate are used to automatically clean the filter element. For filters of different sizes, the electric extension rod is used to adjust the eccentric sealing plate for dynamic sealing compensation. The device also includes an agitator to accelerate the coagulation and sedimentation of smoke, and a detection control system to realize automatic operation, which effectively solves the problems of damage interference, residual smoke influence and poor size adaptability in traditional inspections, and significantly improves the inspection accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the first implementation method of the present application; Figure 2 This is a diagram of the internal structure of the experimental frame of the first implementation mode of this application; Figure 3 For this application Figure 2 A is an enlarged schematic diagram; Figure 4 For this application Figure 2 The enlarged schematic diagram of point B in FIG. Figure 5 A top view of the detection chamber of the first embodiment of the present application; Figure 6 This is a schematic diagram of the assembly of the clamping movable block according to the first embodiment of the present application; Figure 7 This is a state diagram of smoke passing through the filter element in the first embodiment of the present application; Figure 8 This is a state diagram of the sealing plate closing the opening of the test frame according to the first embodiment of the present application; Fig. 9 This is a schematic diagram of the composition of the stirring member of the first embodiment of the present application; Fig.10 This is an installation diagram of the electric extension rod, sealing plate and No. 3 motor of the second embodiment of the present application; Fig.11 This is a diagram showing the state of the sealing plate of the second embodiment of the present application supplementing the sealing when the electric extension rod is in different elongation states. Description of the numbers in the figure: 1. Detection room; 2. Smoke generator; 3. Electric slide rail; 4. Clamping block; 41. Arc clamping plate; 42. Gear part; 43. Motor No. 1; 5. Vacuum cleaner; 6. Hydraulic telescopic rod; 7. Experimental frame; 8. Lead screw; 81. Wind speed sensor; 82. PM2.5 sensor; 9. Motor No. 2; 10. Motor No. 3; 101. Electric extension rod; 11. Sealing plate; 12. Agitator; 121. Small electric push rod; 122. Round plate. DETAILED DESCRIPTION

[0019] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0020] The first implementation method: Figure 1-Figure 4 A detection device for an air filter is shown, which is used to detect the performance of a filter carrying a suction component, including a detection chamber 1, a smoke generator 2 is installed on the top wall of the detection chamber 1, four hydraulic telescopic rods 6 are installed on the bottom wall of the detection chamber 1, and the power ends of the four hydraulic telescopic rods 6 are connected to an experimental frame 7, the inside of the experimental frame 7 stores water mixed with a flocculant, the inner wall of the experimental frame 7 is rotatably connected to a lead screw 8, the surface of the lead screw 8 is threadedly sleeved with a moving block, and a detection member composed of a wind speed sensor 81 and a PM2.5 sensor 82 is installed on the top of the moving block, a hose with a tail end extending to the outer wall of the detection chamber 1 is installed through the inner wall of one side of the detection chamber 7, a vacuum cleaner 5 is installed on the inner wall of one side of the detection chamber 1, and the input end of the vacuum cleaner 5 is connected to a tail end extending to the inside of the experimental frame 7; Electric slide rails 3 are installed on both inner walls of the detection chamber 1, and a clamping movable block 4 for clamping the filter is slidably connected inside the electric slide rails 3; A closing component is installed on the front side of the experimental frame 7, and the closing component includes a No. 3 motor 10. The output end of the No. 3 motor 10 is connected to a sealing plate 11, and the cross-sectional area of ​​the sealing plate 11 is larger than the opening area of ​​the experimental frame 7. The bottom of the sealing plate 11 is in contact with the top surface of the experimental frame 7.

[0021] A second motor 9 is installed on one side outer wall of the experimental frame 7 , and an output end of the second motor 9 is connected to the end of the lead screw 8 .

[0022] Specifically, this embodiment is applicable to the case where the cross-sectional width of the filtering part of the filter is greater than or equal to the cross-sectional width of the opening of the test frame 7. When testing the filter, the filter is clamped and moved to the top of the test frame 7, and the hydraulic telescopic rod 6 is started to drive the test frame 7 to rise, so that the filter fits tightly with the opening of the test frame 7.

[0023] Then start the No. 2 motor 9, which drives the detection part on the surface of the screw 8 to move left and right. At the same time, the suction component of the filter starts to perform the suction operation (at this time, the smoke generator 2 in the experimental frame 7 is not started, and because of the previous round of cleaning operation, the experimental frame 7 is in a state with low dust content). During the movement, the wind speed sensor 81 in the detection part can detect the passing capacity of multiple different points on the surface of the filter. If the wind speed data of multiple points of the wind speed sensor 81 are the same, it indicates that the filtering capacity of the filter is uniform and there is no damage (because if there is a damage, it will cause a difference in the ventilation volume of the damaged part and the ventilation volume of other intact parts). If there is a difference, it indicates that the filter element is damaged. At this time, the detection operation is directly terminated and the filter can be taken out.

[0024] After the filter element is initially established, start the smoke generator 2 (such as Figure 7 As shown), the particle size of the smoke output by the smoke generator 2 is controlled to be larger than the interception size of the filter element (this is the prior art, and the specific controllable range and accuracy depend on the type and design of the generator, which will not be elaborated on), so that theoretically there is no smoke in the air below the filter. As the smoke passes through time, the wind speed detected by the wind speed sensor 81 gradually decreases. Through different wind speed data corresponding to multiple time nodes at the same position, an interception data graph of the filter element can be drawn.

[0025] If there are non-penetrating cracks on the surface of the filter element (that is, there are cracks on the surface), the operation of detecting whether there are cracks in the filter element in the initial state cannot detect the existence of the cracks (because when performing damage detection in the initial state, the surface cracks have not yet caused penetrating cracks, so the wind force passing through remains uniform), but with the continuous suction of the subsequent suction wind force, the depth of the cracks will increase, so that in this process, the wind speed will suddenly increase and the amount of smoke detected by the PM2.5 sensor 82 will suddenly increase. At this time, the detection operation is directly terminated, and the smoke under the filter will enter the water body below, and under the action of the flocculant, it will be mixed and precipitated, and the gas will be discharged into the detection chamber 1 through the hose to achieve stable air pressure in the experimental frame 7.

[0026] After the test is completed, the suction component continues to maintain suction for a period of time to suck the residual smoke from the smoke generator 2 and above the filter to the surface of the filter, then the suction component is closed, and the test frame 7 is driven down by the hydraulic telescopic rod 6, and then the filter is taken out of the interior of the test chamber 1.

[0027] If smoke and dust are present under the filter during the experiment due to non-penetrating cracks, in order to avoid smoke and dust interference between two rounds of testing, it is necessary to clean the dust inside the experimental frame 7, start the No. 3 motor 10, drive the sealing plate 11 to rotate 90 degrees and then close the opening of the experimental frame 7 (such as Figure 8As shown), the vacuum cleaner 5 is then started to vacuum and clean the smoke floating in the test frame 7 and the smoke adhering to the inner wall of the test frame 7, the lead screw 8 and the surface of the detection part (the flocculated and precipitated part is retained in the water body and will not affect the detection data of the PM2.5 sensor 82 in subsequent detection).

[0028] Figure 6 As shown, two rotating rods are installed on the surfaces of the two clamping movable blocks 4 that are close to each other, and the surfaces of the two rotating rods are sleeved with mutually meshing gear parts 42, and the surfaces of the two rotating rods on the surface of each clamping movable block 4 are also installed with arc-shaped clamping plates 41, and a No. 1 motor 43 is installed inside each clamping movable block 4, and the output end of each No. 1 motor 43 is connected to the end of one of the two rotating rods on the surface of the clamping movable block 4.

[0029] Specifically, during clamping, the first motor 43 is used to drive the two arc-shaped clamping plates 41 to move toward each other, thereby clamping the filter placed on the surface of the clamping movable block 4 .

[0030] Figure 5 It is shown that the sealing plate 11 is placed parallel to the electric slide rail 3 in the initial state, and there is a gap between the side wall of the sealing plate 11 and the surface of the arc-shaped clamping plate 41 in the initial state.

[0031] Specifically, the existence of the spacing ensures that the sealing plate 11 will not block or interfere with the moving clamping movable block 4 and the rotating rod in the initial state.

[0032] Fig. 9 As shown, a filter is installed inside the hose, a plurality of agitators 12 are installed on the bottom wall of the experimental frame 7, a small electric push rod 121 is installed on the inner wall of the agitator 12, and the power end of the small electric push rod 121 slides through the top of the agitator 12 and is connected to a circular plate 122 whose diameter is larger than the outer diameter of the agitator 12.

[0033] Specifically, the filter design in the hose can prevent dust outside the detection chamber 1 from entering the experimental frame 7 when the vacuum cleaner 5 performs a suction and dust removal operation, while ensuring the stability of the air pressure in the experimental frame 7.

[0034] During dust removal, some smoke and dust may float on the water surface. In order to enhance the dust removal effect, a small electric push rod 121 is used to drive the circular plate 122 to move up and down, which can stir the water body, so that the smoke and dust floating on the water surface can be mixed into the water body and flocculated and precipitated through flocculants.

[0035] It also includes a detection and control system, which also includes an analysis module, a data collection module, a cleaning module and a clamping module. The analysis module is used to analyze the experimental data collected by the data collection module. The data collection module is connected to the detection part signal to collect the detection data of the detection part. The cleaning module is connected to the No. 3 motor 10 and the vacuum cleaner 5 signal to suck and clean the smoke and dust in the experimental frame 7 after the experiment is completed. The clamping module is used to clamp the constraint filter.

[0036] The second implementation method: Fig.10 It is shown that the output end of the No. 3 motor 10 is connected to a replacement part, which includes a No. 1 shaft rod, the top end of which is fixedly connected to a horizontal electric extension rod 101, the power end surface of the electric extension rod 101 is connected to a vertically arranged No. 2 shaft rod, the top end of the No. 2 shaft rod is fixedly connected to the bottom of the sealing plate 11, and the connection point between the No. 1 shaft rod and the electric extension rod 101 is located on the surface of the fixed end of the electric extension rod 101 close to the movable end.

[0037] As another improved supplement of the present application, the detection and control system also includes a parameter input module and a calculation module. The parameter input module is used to input the size parameters of the filter, and the calculation module is used to calculate the adjustment value of the electric extension rod 101 when there is a difference between the width of the filter and the width of the experimental frame 7, so that the sealing plate 11 after rotating 90 degrees can seal the gap between the experimental frame 7 and the filter.

[0038] Different from the first embodiment, this embodiment mainly improves the situation in the first embodiment where the cross-sectional width value of the filtering part of the filter is greater than or equal to the cross-sectional width value of the opening of the experimental frame 7. That is, when there is a gap between the filter and the opening of the experimental frame 7, supplementary sealing treatment is performed to avoid interference with the detection data of the PM2.5 sensor 82 during the experiment.

[0039] Specifically, after the filter is slid to the rear end of the experimental frame 7 using the electric slide rail 3, the cross-sectional width of the filter element is obtained according to the parameter input module. After comparing it with the cross-sectional width of the opening of the experimental frame 7, the dimension that the electric extension rod 101 needs to be extended is obtained through the calculation module, so that the rotating sealing plate 11 can just process the gap between the two to supplement it.

[0040] The first shaft rod, the electric extension rod 101 and the second shaft rod are arranged eccentrically, and the length of the electric extension rod 101 can be adjusted by telescoping to achieve different supplementary effects (such as Fig.11 as shown).

[0041] The third implementation method: A detection method, the steps are as follows: S1. When testing, after the filter is clamped by the clamping movable block 4, the clamped filter is moved to the top of the test frame 7 with the cooperation of the electric slide rail 3; S2. Lift the test frame 7 using the hydraulic telescopic rod 6 so that the top of the test frame 7 is closely fitted to the bottom surface of the filter; S3, when the cross-sectional width value of the test frame 7 is smaller than the filter cross-sectional width of the filter, the suction assembly and the second motor 9 are started first. At this time, the dust amount in the test frame 7 is within the set threshold range. The detection member is used to move and detect the wind force under the entire filter to see whether it is uniform and whether the filter element in the filter is damaged. If damaged, the detection ends, otherwise continue to S4; S31, if the cross-sectional width of the test frame 7 is greater than the filter cross-sectional width of the filter, the electric extension rod 101 is used to adjust the center position of the sealing plate 11 before rotation, so that the sealing plate 11 after subsequent rotation can fill the gap between the filter and the test frame 7; S4, start the suction component and the smoke generator 2, control the smoke generator 2 to output a smoke particle size larger than the filtering size of the filter, and check the detection data of the detection piece; S5. After the test is completed, the filter in the clamped state is moved out of the test chamber 1, and then the sealing plate 11 is rotated until the sealing plate 11 covers the opening of the test frame 7, and then the vacuum cleaner 5 is started to suck out the residual smoke and dust in the test frame 7, waiting for the next round of test operation.

[0042] In summary, during detection, the screw 8 and the detection component are used to pre-check the integrity of the filter element through the wind speed uniformity, and then the smoke test is started. In the smoke test, the moving detection component is used to detect whether there is a sudden increase in nodes to determine whether there are non-penetrating cracks in the filter element; after the detection, the vacuum cleaner 5 and the rotatable sealing plate 11 are used to automatically clean, and for filters of different sizes, the electric extension rod 101 is used to adjust the eccentric sealing plate 11 for dynamic sealing compensation. The device also includes an agitator 12 to accelerate the coagulation and precipitation of smoke, and a detection control system to realize automatic operation, which effectively solves the problems of damage interference, residual smoke influence and poor size adaptability in traditional detection, and significantly improves the detection accuracy and efficiency.

[0043] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An air filter detection device for detecting the performance of a filter carrying a suction assembly, comprising a detection chamber (1), characterized in that: The top wall of the detection chamber (1) is installed with a smoke generator (2), the bottom wall of the detection chamber (1) is installed with four hydraulic telescopic rods (6), and the power ends of the four hydraulic telescopic rods (6) are connected to an experimental frame (7), the interior of the experimental frame (7) stores water mixed with a flocculant, the inner wall of the experimental frame (7) is rotatably connected with a lead screw (8), the surface of the lead screw (8) is threadedly sleeved with a moving block, the top of the moving block is installed with a detection member consisting of a wind speed sensor (81) and a PM2.5 sensor (82), a hose with a tail end extending to the outer wall of the detection chamber (1) is installed through the inner wall of one side of the detection chamber (1), a vacuum cleaner (5) is installed on the inner wall of one side of the detection chamber (1), and the input end of the vacuum cleaner (5) is connected to a tail end extending to the interior of the experimental frame (7); Electric slide rails (3) are installed on both inner walls of the detection chamber (1), and a clamping movable block (4) for clamping a filter is slidably connected inside the electric slide rail (3); A sealing component is installed on the front side of the experimental frame (7), and the sealing component includes a No. 3 motor (10). The output end of the No. 3 motor (10) is connected to a sealing plate (11), and the cross-sectional area of ​​the sealing plate (11) is larger than the opening area of ​​the experimental frame (7). The bottom of the sealing plate (11) is in contact with the top surface of the experimental frame (7).

2. The air filter detection device according to claim 1, characterized in that: Two rotating rods are installed on surfaces of the two clamping movable blocks (4) close to each other, and the surfaces of the two rotating rods are sleeved with mutually meshing gear members (42), and the surfaces of the two rotating rods on the surface of each clamping movable block (4) are also installed with arc-shaped clamping plates (41), and a No. 1 motor (43) is installed inside each clamping movable block (4), and the output end of each No. 1 motor (43) is connected to the end of one of the two rotating rods on the surface of the clamping movable block (4).

3. The air filter detection device according to claim 2, characterized in that: The sealing plate (11) is placed parallel to the electric slide rail (3) in an initial state, and a distance exists between the side wall of the sealing plate (11) and the surface of the arc-shaped clamping plate (41) in the initial state.

4. The air filter detection device according to claim 1, characterized in that: A second motor (9) is installed on one side outer wall of the experimental frame (7), and an output end of the second motor (9) is connected to the end of the lead screw (8).

5. The air filter detection device according to claim 1, characterized in that: A filter is installed inside the hose, a plurality of agitators (12) are installed on the bottom wall of the experimental frame (7), a small electric push rod (121) is installed on the inner wall of the agitator (12), and the power end of the small electric push rod (121) slides through the top end of the agitator (12) and is connected to a circular plate (122) having a diameter greater than the outer diameter of the agitator (12).

6. The air filter detection device according to claim 1, characterized in that: The system also includes a detection control system, which includes an analysis module, a data collection module, a cleaning module and a clamping module. The analysis module is used to analyze the experimental data collected by the data collection module. The data collection module is connected to the detection part signal to collect the detection data of the detection part. The cleaning module is connected to the third motor (10) and the dust collector (5) signal to suck and clean the smoke in the experimental frame (7) after the experiment. The clamping module is used to clamp the constraint filter.

7. The air filter detection device according to claim 6, characterized in that: The output end of the third motor (10) is connected to a replacement part, the replacement part comprising a first shaft rod, the top end of the first shaft rod is fixedly connected to a horizontal electric extension rod (101), the power end surface of the electric extension rod (101) is connected to a vertically arranged second shaft rod, the top end of the second shaft rod is fixedly connected to the bottom of the sealing plate (11), and the connection point between the first shaft rod and the electric extension rod (101) is located on the surface of the fixed end of the electric extension rod (101) close to the movable end.

8. The air filter detection device according to claim 7, characterized in that: The detection control system further comprises a parameter input module and a calculation module, wherein the parameter input module is used to input the size parameters of the filter, and the calculation module is used to calculate the adjustment value of the electric extension rod (101) when there is a difference between the width of the filter and the width of the test frame (7), so that the sealing plate (11) rotated 90 degrees can block the gap between the test frame (7) and the filter.

9. A detection method, applicable to a detection device for an air filter according to any one of claims 1 to 8, characterized in that: Here are the steps: S1. When testing, the filter is clamped by the clamping movable block (4), and then the clamped filter is moved to the top of the test frame (7) with the cooperation of the electric slide rail (3); S2, using the hydraulic telescopic rod (6) to lift the test frame (7) so that the top of the test frame (7) is closely fitted with the bottom surface of the filter; S3, when the cross-sectional width of the test frame (7) is less than the filter cross-sectional width of the filter, the suction assembly and the second motor (9) are started first. At this time, the dust amount in the test frame (7) is within the set threshold range. The detection member is used to move and detect the wind force under the entire filter to see whether it is uniform and whether the filter element in the filter is damaged. If damaged, the detection is terminated. Otherwise, the detection is continued to S4; S31, if the cross-sectional width of the test frame (7) is greater than the filtering cross-sectional width of the filter, the electric extension rod (101) is used to adjust the center position of the sealing plate (11) before rotation, so that the sealing plate (11) after subsequent rotation can fill the gap between the filter and the test frame (7); S4, starting the suction component and the smoke generator (2), controlling the smoke generator (2) to output smoke particles with a diameter larger than the filtration size of the filter, and checking the test data of the test piece; S5. After the test is completed, the filter in the clamped state is moved out of the test chamber (1), and then the sealing plate (11) is rotated until the sealing plate (11) covers the opening of the test frame (7), and then the vacuum cleaner (5) is started to suck out the residual smoke and dust in the test frame (7), and wait for the next round of test operation.

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