A filter screen detection device and a detection method

Abstract

The application relates to a filter screen detection device and a detection method, which comprise a rack, a smoke generating mechanism, a detection mechanism and a conveying mechanism, the smoke generating mechanism is installed at the bottom of the rack, the conveying mechanism is installed on the surface of the rack and penetrates through the detection mechanism, the detection mechanism comprises a detection box, a fixing part, a laser part and a CCD video detection part, the fixing part is located at the middle part of the detection box and is used for placing and sealingly fixing the filter screen, so that the filter screen is conveniently detected, the laser part is located above the fixing part and is used for generating a light curtain, when smoke passes through the filter screen and passes through the light curtain, the smoke has relatively obvious contrast, is used for detecting and judging whether the filter screen has a leakage point, the CCD video detection part is located above the detection box and is used for observing whether the light curtain generated by the laser part changes in the detection process, and then whether the filter screen has a leakage point is accurately detected. The application has the characteristics of high detection precision, short detection period, convenient production and use and the like.

Description

Technical Field

[0001] This invention relates to the field of filter testing equipment technology, and in particular to a testing device and method for filter screens. Background Technology

[0002] High-efficiency particulate air (HEPA) filters are the core of air purification technology, and the accuracy of HEPA filter leak detection directly affects whether a cleanroom can achieve the required cleanliness level. Existing methods for leak detection after HEPA filter installation mainly include counting scanning, photometer scanning, variable air volume (VAV) leak detection, and smoke leak detection.

[0003] The counting scanning method and the photometer scanning method generally involve arranging gridded measurement points on the filter outlet plane and detecting them one by one. Since each grid point needs to be detected, the overall detection time is relatively long, and there are gaps between the grid measurement points, resulting in detection blind spots.

[0004] The smoke leak detection method involves irradiating the filter outlet plane with mixed frequency light and visually observing the aerosol gas. For example, the invention patent with publication number CN113390565A discloses a filter leak detection device and its testing method. It mainly involves manual visual observation of whether smoke is leaking under the illumination of the lighting component. Due to the long working hours and high work intensity, workers are prone to fatigue and errors, which limits the detection accuracy. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, one of the objectives of this invention is to provide a filter screen detection device with high detection accuracy, fast speed and high degree of automation.

[0006] The above-mentioned objective of this invention is achieved through the following technical solutions:

[0007] A filter screen detection device includes a frame, a smoke generating mechanism, a detection mechanism, and a conveying mechanism. The smoke generating mechanism is installed at the bottom of the frame, and its output end is connected to the detection mechanism for conveying smoke to the detection mechanism for detection.

[0008] The conveying mechanism is installed on the surface of the frame and extends through the detection mechanism to move the filter screen for convenient detection.

[0009] The detection mechanism is installed in the middle of the frame and is used to detect whether the filter screen is leaking.

[0010] The detection mechanism includes a detection box, a fixing unit, a laser unit, and a CCD video detection unit.

[0011] The fixing part is located in the middle of the testing box and is used to place the filter screen for sealing and fixing, so as to facilitate the testing of the filter screen;

[0012] The laser unit is located above the fixed part and is used to generate a light curtain. When smoke passes through the filter and then through the light curtain, it will produce smoke with a relatively obvious contrast, which is used to detect and determine whether there is a leak in the filter.

[0013] The CCD video detection unit is located above the detection box and is used to observe whether there are any changes in the light curtain generated by the laser unit during the detection process, thereby accurately detecting whether there are any leaks in the filter.

[0014] By adopting the above technical solution, during testing, the conveying mechanisms at both ends of the testing box convey and fix the filter screen, which then enters the testing box and is fixed by the fixing part, making it convenient for testing. The laser part and the CCD video detection part work together to detect whether there is leakage in the filter screen. The smoke generating mechanism at the bottom is used to generate smoke for detection. This device not only has high detection accuracy and no blind spots, but also has a short interval cycle and a high degree of automation, making it convenient for production use.

[0015] In a preferred embodiment, the present invention can be further configured such that: the sealing assembly includes a rotating shaft, a return spring, an L-shaped rotating plate, and a support plate; the rotating shaft is installed inside the detection box; the L-shaped rotating plate is installed on the surface of the rotating shaft; the support plate is disposed at the bottom of the L-shaped rotating plate; one end of the return spring is fixedly connected to the inner wall of the detection box, and the other end is connected to the side wall of the L-shaped rotating plate.

[0016] By adopting the above technical solution, after the filter screen is placed inside the test chamber, the L-shaped rotating plate rotates along the rotating shaft until it abuts against the support plate to achieve a seal. After the test is completed, as the filter screen is removed, the reset spring drives the L-shaped rotating plate to reset, which facilitates the next test. The rotating L-shaped rotating plate can rotate synchronously with the filter screen, further ensuring the sealing of the equipment.

[0017] In a preferred embodiment, the present invention can be further configured such that: the CCD video detection unit includes a horizontal adjustment component, a height adjustment component, and a camera; the horizontal adjustment component is fixedly mounted on the surface of the frame; the output end of the horizontal adjustment component is connected to the height adjustment component; and the output end of the height adjustment component is connected to the camera.

[0018] By adopting the above technical solution, the horizontal adjustment component and the height adjustment component can adjust the position of the camera, which facilitates the observation of the filter and ensures the accuracy of the detection results.

[0019] In a preferred embodiment, the present invention can be further configured such that: the smoke generating mechanism includes a smoke generator, a conveying pipe and a drain pipe, the smoke generator is fixedly installed at the bottom of the frame, the output end of the smoke generator is connected to the bottom of the detection box through the conveying pipe, and the bottom of the detection box is connected to the drain pipe.

[0020] By adopting the above technical solution, the smoke generator can generate smoke, which is then transported to the inside of the testing chamber through a conveying pipe for testing. The drain pipe at the bottom of the testing chamber can centrally treat the oil stains inside the testing chamber.

[0021] In a preferred embodiment, the present invention can be further configured as follows: the conveying mechanism includes a loading section, a conveying section, a unloading section, and a moving section. The loading section and the unloading section are located at opposite ends of the detection box, the conveying section is located inside the detection box, and the conveying section is located above the fixed section. The inner wall of the detection box is provided with an installation groove, and the conveying section is located inside the installation groove. Sealing baffles are provided on both sides of the detection box. The moving section can move between the loading section, the conveying section, and the unloading section to drive the filter screen to move.

[0022] By adopting the above technical solution, the filter screen is fixed on the surface of the moving part and moves in and out of the testing box under the drive of the feeding part, conveying part and unloading part, which facilitates testing.

[0023] In a preferred embodiment, the present invention can be further configured such that the feeding section, the unloading section, and the conveying section each include a driving wheel, a driven wheel, and a conveyor belt, one end of the conveyor belt is connected to the driving wheel, the other end is connected to the driven wheel, and the moving part is located above the conveyor belt.

[0024] By adopting the above technical solution, the conveyor belt rotates along the driven wheel under the drive of the drive wheel, which in turn drives the moving part and the bottom filter screen to move, so as to enter and exit the test box and complete the test.

[0025] In a preferred embodiment, the present invention can be further configured such that: the moving part includes a connecting plate, a driving cylinder and an electromagnetic chuck, the connecting plate abuts against the conveyor belt and moves along the conveying direction of the conveyor belt, a driving cylinder is provided at each of the four corners of the connecting plate, and an electromagnetic chuck is provided at the bottom of the driving cylinder.

[0026] By adopting the above technical solution, the electromagnetic chuck can move up and down under the drive of the cylinder, which facilitates the picking and placing of the filter screen and the testing.

[0027] In a preferred embodiment, the present invention can be further configured such that: the interior of the detection box is provided with a partition below the fixed part, the partition includes a driving member, a sliding rod, a slider and a sealing cloth, the driving member is installed at one end inside the detection box, the output end of the driving member is connected to the sliding rod, the slider is slidably installed on the surface of the sliding rod, one side of the sealing cloth is fixedly connected to the inner wall of the detection box, and the other side is connected to the slider.

[0028] By adopting the above technical solution, the slider moves along the length of the slide rod under the drive of the driving component, thereby moving the sealing cloth on the surface, separating the internal space of the detection box, facilitating quick switching and improving detection efficiency.

[0029] One of the objectives of this invention is to provide a method for detecting filter screens.

[0030] The above-mentioned objective of this invention is achieved through the following technical solutions:

[0031] A method for detecting filter screens includes the following steps:

[0032] S1. Under the adsorption of the electromagnetic chuck, the filter screen to be tested is fixed below the moving part and moved along the feeding part to be transported into the interior of the testing box.

[0033] S2. Driven by the conveyor, after the filter screen is completely inside the test box, the filter screen is placed on the surface of the fixed part by the height adjustment component. Then, the electromagnetic chuck is released, the height adjustment component is reset, and it is moved by the conveyor until it is completely removed from the test box. Then, the sealing baffles on both sides of the test box are closed and the partition is opened.

[0034] S3, the horizontal adjustment component and the height adjustment component drive the camera to adjust its position until the entire filter is completely inside the camera. Then, the smoke generation mechanism is activated to detect and time the process.

[0035] S4. Smoke enters the interior of the detection box through the delivery pipe and accumulates at the bottom of the filter. At this time, the light curtain does not change. When the camera detects a change in the light curtain, it indicates that the filter is leaking.

[0036] S5. After the test is completed, open the sealing baffle and close the partition at the same time. Then, driven by the feeding part, the filter screen is conveyed to the next station. Then, repeat steps S1-S4 until all filter screens are tested.

[0037] In summary, the present invention has at least one of the following beneficial technical effects:

[0038] In this invention, the cooperation between the CCD video detection unit, the laser unit, and the fixing unit enables high-precision detection of the filter without manual intervention, greatly improving the detection efficiency and accuracy of the filter and facilitating its production use. In addition, the partition provided below the fixing unit allows for the sealing of smoke during filter replacement in the detection process, thereby reducing switching time. This eliminates the need to shut down the smoke generating mechanism and also results in high switching efficiency. Attached Figure Description

[0039] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0040] Figure 1 This is a schematic diagram of the overall structure of this embodiment.

[0041] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the detection box in this embodiment.

[0042] Figure 3 This is a schematic diagram of the CCD video detection unit in this embodiment.

[0043] Figure 4 This is a schematic diagram of the connection structure between the feeding section and the conveying section in this embodiment.

[0044] The labels in the attached diagram are:

[0045] 1. Frame; 2. Smoke Generating Mechanism; 21. Smoke Generator; 22. Conveying Pipe; 23. Drainage Pipe; 3. Detection Mechanism; 31. Detection Box; 311. Guide Groove; 312. Sealing Baffle; 32. Fixing Part; 321. Rotating Shaft; 322. Return Spring; 323. L-shaped Rotating Plate; 324. Support Plate; 33. Laser Unit; 34. CCD Video Detection Unit; 341. Horizontal Adjustment Assembly; 342. Height Adjustment Assembly; 343. Camera 35. Head; 35. Divider; 351. Drive unit; 352. Slide bar; 353. Slider; 354. Sealing cloth; 4. Conveying mechanism; 41. Feeding unit; 411. Drive wheel; 412. Driven wheel; 413. Conveyor belt; 42. Conveying section; 43. Unloading section; 44. Moving section; 441. Connecting plate; 442. Drive cylinder; 443. Electromagnetic chuck; 5. Recycling mechanism; 51. First recycling pipe; 52. Second recycling pipe; 53. Recycling chamber. Detailed Implementation

[0046] The present invention will be further described in detail below with reference to the accompanying drawings.

[0047] Reference Figures 1-4This invention discloses a filter screen detection device, comprising a frame 1, a smoke generating mechanism 2, a detection mechanism 3, a conveying mechanism 4, and a recycling mechanism 5.

[0048] The smoke generating mechanism 2 is installed at the bottom of the frame 1. The output end of the smoke generating mechanism 2 is connected to the detection mechanism 3 and is used to supply smoke to the detection mechanism 3 for detection.

[0049] The detection mechanism 3 is installed in the middle of the frame 1 and is used to detect whether the filter screen is leaking.

[0050] The conveying mechanism 4 is installed on the surface of the frame 1 and passes through the detection mechanism 3. It is used to move the filter screen to facilitate detection.

[0051] The recycling mechanism 5 is installed on one side of the detection mechanism 3, which facilitates the recycling of smoke inside the detection box 31. This not only makes the process easier but also allows for timely handling of leaked smoke during filter switching, ensuring the accuracy of the test results.

[0052] During testing, the conveying mechanisms 4 at both ends of the testing chamber 31 transport and fix the filter screen, which then enters the testing chamber 31. The testing mechanism 3 detects whether there is leakage in the filter screen. The smoke generating mechanism 2 at the bottom generates smoke for detection, and the recovery mechanism 5 on the side promptly recovers the smoke inside the testing chamber 31 after the test is completed, ensuring the accuracy of the test results. This device not only has high detection accuracy and no blind spots, but also has a short interval cycle and a high degree of automation, making it convenient for production use.

[0053] Reference Figure 1 The smoke generating mechanism 2 includes a smoke generator 21, a conveying pipe 22, and a drain pipe 23. The smoke generator 21 is fixedly installed at the bottom of the frame 1. The output end of the smoke generator 21 is connected to the bottom of the detection box 31 through the conveying pipe 22. The bottom of the detection box 31 is connected to the drain pipe 23. The smoke generator 21 can generate smoke, which is conveyed to the inside of the detection box 31 through the conveying pipe 22 for detection. The drain pipe 23 at the bottom of the detection box 31 can centrally process the oil stains inside the detection box 31.

[0054] Reference Figure 1 and Figure 4The conveying mechanism 4 includes a loading section 41, a conveying section 42, a discharging section 43, and a moving section 44. The loading section 41 and the discharging section 43 are located at opposite ends of the testing box 31. The conveying section 42 is located inside the testing box 31 and above the fixed section 32. The inner wall of the testing box 31 has an installation groove, and the conveying section 42 is located inside the installation groove. Sealing baffles 312 are provided on both sides of the testing box 31. The moving section 44 can move between the loading section 41, the conveying section 42, and the discharging section 43 to drive the filter screen to move. The loading section 41, the discharging section 43, and the conveying section 42 each include a driving wheel 411, a driven wheel 412, and a conveyor belt 413. One end of the conveyor belt 413 is connected to the driving wheel 411, and the other end is connected to the driven wheel 412. The moving section 44 is located above the conveyor belt 413. The moving part 44 includes a connecting plate 441, a drive cylinder 442, and an electromagnetic chuck 443. The connecting plate 441 abuts against the conveyor belt 413 and moves along the transmission direction of the conveyor belt 413. A drive cylinder 442 is installed at each of the four corners of the connecting plate 441, and an electromagnetic chuck 443 is installed at the bottom of each drive cylinder 442. The filter screen is fixed to the surface of the moving part 44 and moves in and out of the testing box 31 under the drive of the loading part 41, the conveying part 42, and the unloading part 43 for easy testing. Driven by the drive wheel 411, the conveyor belt 413 rotates along the driven wheel 412, thereby moving the moving part 44 and the filter screen at the bottom to move in and out of the testing box 31 and complete the testing. Driven by the drive cylinder 442, the electromagnetic chuck 443 can move up and down, facilitating the picking and placing of the filter screen and the testing process.

[0055] Reference Figure 2 and Figure 3 The testing mechanism 3 includes a testing box 31, a fixing part 32, a laser part 33, a CCD video testing part 34, and a separating part 35.

[0056] The fixing part 32 is located in the middle of the test box 31 and is used to place the filter screen for sealing and fixing, so as to facilitate the test of the filter screen;

[0057] The laser unit 33 is located above the fixed unit 32 and is used to generate a light curtain. When smoke passes through the filter and passes through the light curtain, it will produce smoke with a relatively obvious contrast, which is used to detect and determine whether there is a leak in the filter.

[0058] The CCD video detection unit 34 is located above the detection box 31 and is used to observe whether there are any changes in the light curtain generated by the laser unit 33 during the detection process, so as to accurately detect whether there are any leaks in the filter.

[0059] The separator 35 is located below the fixing part 32 and is used to separate the detection box 31. This facilitates the prevention of smoke leakage when the filter is replaced, which not only improves the utilization rate of smoke, but also eliminates the need to wait for the smoke to be released after complete recovery, resulting in higher work efficiency.

[0060] The fixing part 32 includes a rotating shaft 321, a return spring 322, an L-shaped rotating plate 323, and a support plate 324. The rotating shaft 321 is installed inside the detection box 31, the L-shaped rotating plate 323 is installed on the surface of the rotating shaft 321, and the support plate 324 is provided at the bottom of the L-shaped rotating plate 323. One end of the return spring 322 is fixedly connected to the inner wall of the detection box 31, and the other end is connected to the side wall of the L-shaped rotating plate 323. The fixing part 32 is used to provide temporary fixation and sealing during the filter screen testing process, thereby improving the filter screen testing efficiency. On the one hand, it ensures the stability of the filter screen, and on the other hand, it prevents smoke from leaking from all sides of the filter screen, thereby ensuring the accuracy of the test results. After the filter screen is placed inside the fixing part 32, the L-shaped rotating plate 323 rotates along the rotating shaft 321 until it abuts against the support plate 324 to achieve a seal. When the test is completed, as the filter screen is removed, the reset spring 322 drives the L-shaped rotating plate 323 to reset, which is convenient for the next test. The rotating L-shaped rotating plate 323 can rotate synchronously with the filter screen, further ensuring the sealing of the equipment.

[0061] The CCD video inspection unit 34 includes a horizontal adjustment component 341, a height adjustment component 342, and a camera 343. The horizontal adjustment component 341 is fixedly mounted on the surface of the frame 1. The output end of the horizontal adjustment component 341 is connected to the height adjustment component 342, and the output end of the height adjustment component 342 is connected to the camera 343. The horizontal adjustment component 341 and the height adjustment component 342 can adjust the position of the camera 343, which facilitates the observation of the filter and ensures the accuracy of the inspection results.

[0062] The partition 35 includes a drive unit 351, a slide bar 352, a slider 353, and a sealing cloth 354. The drive unit 351 is installed at one end inside the detection box 31. The output end of the drive unit 351 is connected to the slide bar 352. The slider 353 is slidably installed on the surface of the slide bar 352. One side of the sealing cloth 354 is fixedly connected to the inner wall of the detection box 31, and the other side is connected to the slider 353. Driven by the drive unit 351, the slider 353 moves along the length of the slide bar 352, thereby moving the sealing cloth 354 on the surface, separating the internal space of the detection box 31, facilitating quick switching and improving detection efficiency.

[0063] The recycling mechanism 5 includes a first recycling pipe 51, a second recycling pipe 52, and a recycling box. The recycling box is installed on one side of the frame 1. One end of the first recycling pipe 51 is connected to the recycling box, and the other end is connected to the detection box 31. One end of the second recycling pipe 52 is connected to the recycling box, and the other end is connected to the detection box 31. The first recycling pipe 51 is located above the fixing part 32, and the second recycling pipe 52 is located between the fixing part 32 and the partition part 35. The first recycling pipe 51 is used to recycle the smoke leaking from the fixing part 32 after a filter screen test is completed, and to recycle all the smoke after all filter screen tests are completed. The second recycling pipe 52 is used to recycle the smoke between the fixing part 32 and the partition part 35 after the partition part 35 is closed after a filter screen test is completed, so as to facilitate the removal and placement of the filter screen and the next test.

[0064] A method for detecting filter screens includes the following steps:

[0065] S1. Under the adsorption of the electromagnetic chuck 443, the filter screen to be tested is fixed below the moving part 44 and moves along the feeding part 41 to be transported into the interior of the testing box 31.

[0066] S2. Driven by the conveying unit 42, after the filter screen is completely inside the detection box 31, it is placed on the surface of the fixing part 32 by the height adjustment component 342. Then, the electromagnetic chuck 443 is released, the height adjustment component 342 is reset, and it moves under the drive of the conveying unit 42 until it is completely removed from the detection box 31. Then, the sealing baffles 312 on both sides of the detection box 31 are closed and the partition part 35 is opened.

[0067] S3, the horizontal adjustment component 341 and the height adjustment component 342 drive the camera 343 to adjust its position until the entire filter is completely inside the camera 343, then the smoke generating mechanism 2 is activated to detect and time the process;

[0068] S4. Smoke enters the interior of the detection box 31 through the delivery pipe 22 and accumulates at the bottom of the filter. At this time, the light curtain does not change. When the camera 343 detects a change in the light curtain, it indicates that the filter is leaking.

[0069] S5. After the test is completed, open the sealing baffle 312 and close the partition 35 at the same time. Then, driven by the feeding part 43, the filter screen is conveyed to the next station. Then, repeat steps S1-S4 until all filter screens are tested.

[0070] This device features high detection accuracy, no blind spots, a high degree of automation, no need for manual operation, short waiting time, and convenient use in production.

[0071] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting filter screens, comprising a frame (1), a smoke generating mechanism (2), a detection mechanism (3), and a conveying mechanism (4), characterized in that: The smoke generating mechanism (2) is installed at the bottom of the frame (1), and the output end of the smoke generating mechanism (2) is connected to the detection mechanism (3) for conveying smoke to the detection mechanism (3) for detection. The conveying mechanism (4) is installed on the surface of the frame (1) and passes through the detection mechanism (3) to drive the filter screen to move, so as to facilitate detection; The detection mechanism (3) is installed in the middle of the frame (1) and is used to detect whether the filter screen is leaking. The detection mechanism (3) includes a detection box (31), a fixing part (32), a laser part (33), and a CCD video detection part (34). The fixing part (32) is located in the middle of the detection box (31) and is used to place the filter screen for sealing and fixing, so as to facilitate the detection of the filter screen; The laser unit (33) is located above the fixing unit (32) and is used to generate a light curtain. When smoke passes through the filter screen and passes through the light curtain, it will generate smoke with a relatively obvious contrast, which is used to detect and determine whether there is a leak in the filter screen. The CCD video detection unit (34) is located above the detection box (31) and is used to observe whether the light curtain generated by the laser unit (33) changes during the detection process, so as to accurately detect whether the filter has a leakage point; The interior of the testing box (31) is provided with a partition (35) below the fixing part (32). The partition (35) includes a driving member (351), a sliding rod (352), a slider (353), and a sealing cloth (354). The driving member (351) is installed at one end inside the testing box (31). The output end of the driving member (351) is connected to the sliding rod (352). The slider (353) is slidably installed on the surface of the sliding rod (352). One side of the sealing cloth (354) is fixedly connected to the inner wall of the testing box (31), and the other side is connected to the slider (353).

2. The filter screen detection device according to claim 1, characterized in that: The fixing part (32) includes a rotating shaft (321), a return spring (322), an L-shaped rotating plate (323), and a support plate (324). The rotating shaft (321) is installed inside the detection box (31). The L-shaped rotating plate (323) is installed on the surface of the rotating shaft (321). The support plate (324) is provided at the bottom of the L-shaped rotating plate (323). One end of the return spring (322) is fixedly connected to the inner wall of the detection box (31), and the other end is connected to the side wall of the L-shaped rotating plate (323).

3. The filter screen detection device according to claim 2, characterized in that: The CCD video detection unit (34) includes a horizontal adjustment component (341), a height adjustment component (342), and a camera (343). The horizontal adjustment component (341) is fixedly installed on the surface of the frame (1). The output end of the horizontal adjustment component (341) is connected to the height adjustment component (342), and the output end of the height adjustment component (342) is connected to the camera (343).

4. The filter screen detection device according to claim 3, characterized in that: The smoke generating mechanism (2) includes a smoke generator (21), a conveying pipe (22) and a drain pipe (23). The smoke generator (21) is fixedly installed at the bottom of the frame (1). The output end of the smoke generator (21) is connected to the bottom of the detection box (31) through the conveying pipe (22). The bottom of the detection box (31) is connected to the drain pipe (23).

5. The filter screen detection device according to claim 4, characterized in that: The conveying mechanism (4) includes a loading section (41), a conveying section (42), a unloading section (43), and a moving section (44). The loading section (41) and the unloading section (43) are located at opposite ends of the detection box (31). The conveying section (42) is located inside the detection box (31) and above the fixed section (32). The inner wall of the detection box (31) is provided with an installation groove. The conveying section (42) is located inside the installation groove. Sealing baffles (312) are provided on both sides of the detection box (31). The moving section (44) can move between the loading section (41), the conveying section (42), and the unloading section (43) to drive the filter screen to move.

6. The filter screen detection device according to claim 5, characterized in that: The loading section (41), unloading section (43) and conveying section (42) each include a drive wheel (411), a driven wheel (412) and a conveyor belt (413). One end of the conveyor belt (413) is connected to the drive wheel (411) and the other end is connected to the driven wheel (412). The moving part (44) is located above the conveyor belt (413).

7. The filter screen detection device according to claim 6, characterized in that: The moving part (44) includes a connecting plate (441), a driving cylinder (442) and an electromagnetic chuck (443). The connecting plate (441) abuts against the conveyor belt (413) and moves along the transmission direction of the conveyor belt (413). A driving cylinder (442) is provided at each of the four corners of the connecting plate (441), and an electromagnetic chuck (443) is provided at the bottom of the driving cylinder (442).

8. A detection method for a filter screen detection device as described in claim 7, characterized in that, Includes the following steps: S1. Under the adsorption of the electromagnetic chuck (443), the filter screen to be tested is fixed below the moving part (44) and moved along the feeding part (41) to be transported into the interior of the testing box (31). S2. Driven by the conveying unit (42), after the filter screen is completely inside the test box (31), it is placed on the surface of the fixing part (32) by the drive cylinder (442). Then, the electromagnetic chuck (443) is released, the drive cylinder (442) is reset, and it moves under the drive of the conveying unit (42) until it is completely removed from the test box (31). Then, the sealing baffles (312) on both sides of the test box (31) are closed and the partition (35) is opened. S3, the horizontal adjustment component (341) and the height adjustment component (342) drive the camera (343) to adjust its position until the entire filter is completely inside the camera (343), then the smoke generating mechanism (2) is activated to detect and time the process; S4. The smoke enters the interior of the detection box (31) through the delivery pipe (22) and accumulates at the bottom of the filter. At this time, the light curtain does not change. When the camera (343) detects a change in the light curtain, it indicates that there is a leak in the filter. S5. After the test is completed, open the sealing baffle (312) and close the partition (35) at the same time. Then, driven by the feeding part (43), the filter screen is transported to the next station. Then, repeat steps S1-S4 until all filter screens are tested.

Images