Apparatus and process for detecting thickness uniformity of nanofiber membranes

Abstract

The application relates to the technical field of nanofiber membrane detection, and specifically discloses a thickness uniformity detection device and process for a nanofiber membrane, which comprises a detection table. According to different thicknesses of the nanofiber membrane body, the variable-diameter wheel structure can be adjusted, so that the smoothing pressure roller can uniformly press the nanofiber membrane body. When the adjustment ring frame is adjusted, the adjustment ring frame will move, drive the adjustment connecting arm, change the angle of the adjustment connecting arm and the adjustment screw rod, drive the arc plate to expand outward or contract inward through the change of the adjustment connecting arm, and then change the diameter of the whole variable-diameter wheel structure. Therefore, other smoothing pressure rollers do not need to be replaced, and the smoothing work on nanofiber membranes with different thicknesses can be carried out, and the detection efficiency of the nanofiber membrane body is improved.

Description

Technical Field

[0001] This application relates to the field of nanofiber membrane detection technology, and in particular to a device and process for detecting the thickness uniformity of nanofiber membranes. Background Technology

[0002] Nanofiber membranes are mainly prepared from polymer materials using advanced technologies such as electrospinning. They possess excellent properties such as large specific surface area, high porosity, and customizability. These properties enable nanofiber membranes to play an important role in multiple fields. For example, they can be used for air or water filtration to improve filtration efficiency and precision; in the energy field, they can serve as separators or electrode materials for lithium-ion batteries to improve battery performance and safety; and in the biomedical field, they can be used as tissue engineering scaffolds to provide an ideal microenvironment for cell growth.

[0003] To ensure product quality and stability, a white light interferometric thickness sensor is used to detect the thickness uniformity of the nanofiber membrane. The white light interferometric thickness gauge utilizes the principle of laser reflection, measuring the thickness of the product by observing the microscopic geometry of the machined surface of parts in mechanical manufacturing using the optical sectioning method. It is a non-contact, dynamic measuring instrument. Through detection, problems in the production process can be identified in a timely manner, such as uneven spinning or malfunctioning collection devices, allowing for corresponding improvements and optimizations. To maintain the flatness of the nanofiber membrane, a pressure roller is used to smooth the membrane before detection, preventing wrinkles on the surface and thus improving detection accuracy.

[0004] However, the existing technology still has the following problems: the height of the pressure roller is generally fixed. In order to ensure that uniform and appropriate pressure is applied during the smoothing process, multiple pressure rollers of different diameters need to be prepared for replacement when the nanofiber membranes of different thicknesses are used. However, this method is relatively cumbersome and reduces the efficiency of nanofiber membranes. Summary of the Invention

[0005] This application provides a device and process for detecting the thickness uniformity of nanofiber membranes, solving the problem that in the prior art, the height of the pressure roller is generally fixed. In order to ensure that uniform and appropriate pressure is applied during the smoothing process, multiple pressure rollers of different diameters need to be prepared for replacement when dealing with nanofiber membranes of different thicknesses. However, this method is relatively cumbersome and reduces the efficiency of nanofiber membrane processing. This application realizes that it is possible to smooth nanofiber membranes of different thicknesses without replacing other smoothing pressure rollers, thereby improving the detection efficiency of nanofiber membranes.

[0006] This application provides a device for detecting the thickness uniformity of nanofiber membranes, including:

[0007] Testing station;

[0008] A horizontal support frame is provided with symmetrically rotating side arms on both sides. A smoothing roller is provided on the side of the side arms that are close to each other. A roller sleeve is fixedly provided on the outside of the smoothing roller. A variable diameter wheel structure is provided on the side of the side arms that are far apart from each other. The variable diameter wheel structure is used to change the smoothing height of the smoothing roller.

[0009] The variable diameter wheel structure includes an adjusting screw, an adjusting ring frame threaded to the outer side of the adjusting screw, and multiple adjusting arms rotatably arranged on the outer side of the adjusting ring frame. The adjusting arms are inclined, and an arc plate is rotatably arranged at the other end of each adjusting arm. A connecting plate is rotatably arranged at one end of the adjusting screw, and a connecting short rod is fixedly arranged at the other end of the connecting plate. A striking block is fixedly arranged at the other end of the connecting short rod. The striking block is fixedly arranged at both ends of the smoothing pressure roller, and the connecting short rod passes through and is rotatably arranged on one side of the side connecting arm.

[0010] Furthermore, a hydraulic rod is provided above the testing platform, and a hydraulic cylinder is connected to the hydraulic rod. The hydraulic rod is fixedly installed at the top of the cross frame. A transverse movement mechanism and a longitudinal movement mechanism are provided at the bottom of the cross frame. A white light interferometric thickness sensor is provided at the bottom of the longitudinal movement mechanism. The white light interferometric thickness sensor is electrically connected to an external data analyzer.

[0011] Furthermore, light-shielding folding covers are symmetrically fixed on both sides of the testing platform, and magnets are symmetrically fixed on the side of the light-shielding folding covers that are close to each other. The magnets that are close to each other are arranged with opposite poles. A nanofiber membrane body is provided at the top of the testing platform, and feet are fixedly provided at the four corners of the bottom of the testing platform.

[0012] Furthermore, a stabilizing telescopic rod is fixedly installed on the inner side of the arc plate, and a fixed rod connecting plate is fixedly installed on the other end of the stabilizing telescopic rod. A fixed pad is fixedly installed on one side of the fixed rod connecting plate. The fixed pad is rotatably installed on the outer side of one end of the adjusting screw. A sliding fixed connecting rod is symmetrically fixed on the end face of the fixed pad. The sliding fixed connecting rod is slidably installed on the outer side of the adjusting ring frame. The sliding fixed connecting rod is fixedly connected to the connecting plate. A turntable is fixedly installed on the other end of the adjusting screw.

[0013] Furthermore, cover assemblies are provided on both sides of the testing platform. Each cover assembly includes a linkage gear. A connecting plate is fixedly provided at one end of the linkage gear. The connecting plate is fixedly provided on one side of the light-shielding folding cover. A double-sided toothed plate is meshed on the outer side of the linkage gear. The double-sided toothed plate is fixedly connected to the cross frame through a connecting plate and a fixing rod.

[0014] Furthermore, a fixed bracket is rotatably provided on the outer side of one end of the linkage gear, and side brackets are rotatably provided on both sides of the bottom end of the light-shielding folding cover. The side brackets are fixedly provided on one side of the fixed brackets, and the fixed brackets are detachably provided at the bottom end of the testing table.

[0015] Furthermore, a dust removal structure is provided on the outer side of the smoothing roller. The dust removal structure includes a dust suction bin. A piston plate is slidably arranged on the inner side of the dust suction bin. A plurality of stabilizing slide rods are fixedly arranged at the top end of the piston plate. A top connecting plate is fixedly arranged at the other end of the stabilizing slide rods. Lifting contact rods are symmetrically fixedly arranged at the bottom end of the top connecting plate. A plurality of return springs are fixedly arranged at the top end of the dust suction bin. The return springs are arranged on the outer side of the stabilizing slide rods and fixedly arranged at the bottom end of the piston plate.

[0016] Furthermore, the ash suction bin is provided with an ash inlet chamber inside, the piston plate is located inside the ash inlet chamber, the bottom end and one side of the ash suction bin are provided with an inlet and an outlet notch, and a ash storage bin is detachably provided on one side of the ash suction bin, the ash storage bin being fitted into the outer sleeve of the pressure roller.

[0017] Furthermore, the ash removal structure also includes a fixed horizontal bar, with vertical support plates fixedly installed at both ends of the fixed horizontal bar. The vertical support plates are fixedly installed at the top of the side-connected rotating arm, and a wool brush is fixedly installed on the outer side of the fixed horizontal bar, with the wool brush attached to the outer sleeve of the pressure roller.

[0018] The process for detecting the thickness uniformity of nanofiber membranes includes the following steps: The nanofiber membrane body is laid flat on the top of the detection table. Depending on the thickness of the nanofiber membrane body, the variable diameter wheel structure can be adjusted so that the smoothing pressure roller can apply uniform pressure to the nanofiber membrane body. During adjustment, the adjusting screw is rotated to move the adjusting ring frame and drive the adjusting connecting arm, so that the angle between the adjusting connecting arm and the adjusting screw changes. The change of the adjusting connecting arm drives the arc plate to expand outward or contract inward, thereby changing the overall diameter of the variable diameter wheel structure.

[0019] It should be noted that the variable diameter wheel structure will first contact the detection table when it descends. The difference between the diameter of the variable diameter wheel structure and the diameter of the smoothing roller is the thickness of the nanofiber membrane body. Therefore, it is not necessary to replace other smoothing rollers, and smoothing work can be performed on nanofiber membrane bodies of different thicknesses, thus improving the detection efficiency of nanofiber membrane bodies.

[0020] When the cross-mounted frame descends, the double-sided toothed plate will simultaneously mesh with the linkage gear and drive it to rotate, so that the light-shielding folding cover can cover the nanofiber membrane body on the top of the detection stage, preventing external light from entering and affecting the detection results.

[0021] As the smoothing roller rolls, the friction between the wool brush in the dust removal structure and the roller outer sleeve generates static electricity, which in turn adsorbs dust and fine impurities on the top of the nanofiber membrane. As the smoothing roller rotates, the piston plate can generate piston movement, sucking dust and fine impurities from the outside of the roller outer sleeve into the dust storage bin for temporary storage. This facilitates later processing, prevents interference with the roller outer sleeve's continuous adsorption work, and thus improves the detection quality of the nanofiber membrane.

[0022] The technical solution provided in this application has at least the following technical effects or advantages:

[0023] 1. This application utilizes a variable diameter wheel structure. By adjusting the variable diameter wheel structure according to the thickness of the nanofiber membrane body, the smoothing roller can apply uniform pressure to the nanofiber membrane body. During adjustment, the adjusting ring frame moves, driving the adjusting arm and causing the angle between the adjusting arm and the adjusting screw to change. This change in the adjusting arm drives the arc plate to expand outward or contract inward, thereby changing the overall diameter of the variable diameter wheel structure. Therefore, it is not necessary to replace other smoothing rollers to perform smoothing work on nanofiber membrane bodies of different thicknesses, thus improving the detection efficiency of nanofiber membrane bodies.

[0024] 2. By setting up the cover assembly, when the cross-mounted frame descends, the double-sided toothed plate will simultaneously mesh with the linkage gear and drive it to rotate, so that the light-shielding folding cover can cover the nanofiber membrane body on the top of the detection stage, preventing external light from entering and affecting the detection results.

[0025] 3. By setting up a dust removal structure, the outer sleeve of the smoothing roller will rub against the wool brush during the rolling of the smoothing roller, thereby making the outer sleeve of the roller static electricity. While smoothing the nanofiber membrane body, it will adsorb the dust and impurities on its top, thereby improving the detection quality of the nanofiber membrane body. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application;

[0027] Figure 2 This is a partial structural illustration of an embodiment of this application. Figure 1 ;

[0028] Figure 3 This is a three-dimensional structural diagram of the interior of the light-shielding folding cover in the embodiment of this application;

[0029] Figure 4 for Figure 2 Enlarged structural diagram at point A;

[0030] Figure 5 This is a partial structural illustration of an embodiment of this application. Figure 2 ;

[0031] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0032] Figure 7 This is a schematic diagram of the disassembled and combined structure of the side-connected rotating arm and variable diameter wheel structure and the smoothing pressure roller in the embodiment of this application.

[0033] Figure 8 This is a schematic diagram showing the disassembled structure of the light-shielding folding cover and the cover assembly in the embodiments of this application;

[0034] Figure 9 This is a schematic diagram of the combined structure of the transverse support frame, double-sided toothed plate, and connecting plate and fixed rod in the embodiment of this application.

[0035] Figure 10 This is a schematic diagram showing the disassembled structure of the side-connected rotating arm and the ash removal structure in the embodiment of this application.

[0036] In the picture:

[0037] 1. Testing table; 101. Standing feet;

[0038] 2. Light-blocking folding cover; 201. Magnet;

[0039] 3. Hydraulic rod;

[0040] 4. Horizontal support frame; 401. Lateral movement mechanism; 402. Longitudinal movement mechanism; 403. Side-mounted swing arm;

[0041] 5. Variable diameter wheel structure; 501. Adjusting screw; 5011. Turntable; 5012. Connecting plate; 5013. Connecting rod; 502. Adjusting ring frame; 503. Adjusting arm; 504. Arc plate; 505. Stabilizing telescopic rod; 506. Fixed rod connecting plate; 507. Fixed pad; 508. Sliding connecting rod;

[0042] 6. Cover assembly; 601. Linkage gear; 602. Adapter plate; 603. Fixed bracket; 604. Side bracket; 605. Double-sided toothed plate; 606. Connecting plate and fixing rod;

[0043] 7. Ash removal structure; 701. Ash suction bin; 7011. Ash inlet chamber; 702. Return spring; 703. Stabilizing slide bar; 704. Piston plate; 705. Top connecting plate; 706. Fixed crossbar; 707. Wool brush; 708. Vertical support plate; 709. Lifting contact rod; 710. Impact block; 711. Ash storage bin;

[0044] 8. Smooth the pressure roller; 801. Pressure roller outer sleeve;

[0045] 9. White light interferometric thickness sensor;

[0046] 10. Nanofiber membrane body. Detailed Implementation

[0047] This application discloses a thickness uniformity detection device for nanofiber membranes. Through the variable diameter wheel structure 5, the smoothing roller 8 can apply uniform pressure to the nanofiber membrane body 10 based on its thickness. During adjustment, the adjusting ring frame 502 moves, driving the adjusting arm 503, causing a change in the angle between the adjusting arm 503 and the adjusting screw 501. This change in the adjusting arm 503 drives the arc plate 504 to expand outwards or contract inwards, thereby altering the overall diameter of the variable diameter wheel structure 5. Therefore, it is possible to smooth nanofiber membrane bodies 10 of different thicknesses without replacing other smoothing rollers 8, improving the detection efficiency of the nanofiber membrane body 10.

[0048] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0049] Reference Figure 2 , Figure 3 and Figure 4 The thickness uniformity detection device for nanofiber membranes disclosed in this application includes an adjustable diameter wheel structure 5. The adjustable diameter wheel structure 5 is also used to change the smoothing height of the smoothing roller 8. The adjustable diameter wheel structure 5 includes an adjusting screw 501. An adjusting ring frame 502 is threadedly connected to the outer side of the adjusting screw 501. Multiple adjusting arms 503 are rotatably arranged on the outer side of the adjusting ring frame 502. The adjusting arms 503 are inclined. An arc plate 504 is rotatably arranged at the other end of the adjusting arms 503. A connecting plate 5012 is rotatably arranged at one end of the adjusting screw 501. A connecting short rod 5013 is fixedly arranged at the other end of the connecting plate 5012. A striking block 710 is fixedly arranged at the other end of the connecting short rod 5013. The striking block 710 is fixedly arranged at both ends of the smoothing roller 8. The connecting short rod 5013 passes through and is rotatably arranged on one side of the side connecting arm 403.

[0050] When testing nanofiber membrane bodies 10 of different thicknesses, rotating the turntable 5011 in the variable diameter wheel structure 5 drives the adjusting screw 501 to rotate. The rotation of the adjusting screw 501 causes the adjusting ring frame 502 to move, making the angle between the adjusting arm 503 and the adjusting screw 501 larger or smaller, thereby causing the arc plate 504 to expand or contract. When the angle between the adjusting arm 503 and the adjusting screw 501 increases, the arc plate 504 is in an expanded state; conversely, the arc plate 504 is in a contracted state. The minimum diameter of the variable diameter wheel structure 5 is the same as the outer diameter of the pressure roller outer sleeve 801. In this way, the variable diameter wheel structure 5 can first contact the testing table 1. The diameter difference between the variable diameter wheel structure 5 and the pressure roller outer sleeve 801 is the thickness of the nanofiber membrane body 10. This eliminates the need to replace other smoothing pressure rollers 8, improving the testing efficiency of the nanofiber membrane body 10.

[0051] Among them, a stabilizing telescopic rod 505 is fixedly installed on the inner side of the arc plate 504, and a fixed rod connecting plate 506 is fixedly installed on the other end of the stabilizing telescopic rod 505. A fixed pad 507 is fixedly installed on one side of the fixed rod connecting plate 506. The fixed pad 507 is rotatably installed on the outer side of one end of the adjusting screw 501. A sliding fixed connecting rod 508 is symmetrically fixed on the end face of the fixed pad 507. The sliding fixed connecting rod 508 is slidably installed on the outer side of the adjusting ring frame 502. The sliding fixed connecting rod 508 is fixedly connected to the connecting plate 5012. A turntable 5011 is fixedly installed on the other end of the adjusting screw 501.

[0052] Among them, the stabilizing telescopic rod 505 can become longer or shorter as the arc plate 504 expands and contracts, so that the arc plate 504 can move in a specific direction, and when the adjusting ring frame 502 moves, it will slide along the sliding connecting rod 508 and change the position of the stabilizing adjusting ring frame 502.

[0053] It should be noted that, see reference Figure 2 and Figure 7 It also includes a horizontal support frame 4 for supporting the ash removal structure 7. The horizontal support frame 4 has symmetrically rotating side arms 403 on both sides. A smoothing roller 8 is provided on the side of the side arms 403 that are close to each other. A roller jacket 801 is fixedly provided on the outside of the smoothing roller 8.

[0054] When the horizontal support frame 4 descends, the angle between the side connecting arms 403 will increase, so that the pressure roller outer sleeve 801 can contact the nanofiber membrane body 10, and the smoothing pressure roller 8 can roll to achieve a smoothing effect on the nanofiber membrane body 10.

[0055] See Figure 1 , Figure 2 , Figure 3 and Figure 4It also includes a hydraulic rod 3 for adjusting the height of the cross-mounted frame 4. The hydraulic rod 3 is externally connected to a hydraulic cylinder and is fixedly mounted on the top of the cross-mounted frame 4. The bottom of the cross-mounted frame 4 is provided with a transverse movement mechanism 401 and a longitudinal movement mechanism 402. The bottom of the longitudinal movement mechanism 402 is provided with a white light interferometric thickness sensor 9, which is electrically connected to an external data analyzer.

[0056] The data detected by the white light interferometric thickness sensor 9 is transmitted to the data analyzer, so that the staff can see the test results intuitively. The hydraulic rod 3 can be extended or shortened by the external hydraulic cylinder, so that the test work can be carried out.

[0057] Based on the above-described scheme, and referring to Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 9 The testing platform 1 has cover assemblies 6 on both sides. Each cover assembly 6 includes a linkage gear 601. A connecting plate 602 is fixedly mounted on one end of the linkage gear 601 and is fixedly mounted on one side of the light-shielding folding cover 2. A double-sided toothed plate 605 meshes with the outer side of the linkage gear 601. The double-sided toothed plate 605 is fixedly connected to the cross frame 4 via a connecting plate and a fixed rod 606. A fixed bracket 603 is rotatably mounted on the outer side of one end of the linkage gear 601. The bottom end of the light-shielding folding cover 2... Side mounting brackets 604 are rotatably mounted on both sides. The side mounting brackets 604 are fixedly mounted on one side of the fixed mounting bracket 603. The fixed mounting bracket 603 is detachably mounted on the bottom of the testing platform 1. Light-shielding folding covers 2 are symmetrically fixed on both sides of the testing platform 1. Magnets 201 are symmetrically fixed on the side of the light-shielding folding covers 2 that are close to each other. The magnets 201 that are close to each other are arranged with opposite poles. A nanofiber membrane body 10 is mounted on the top of the testing platform 1. Standing feet 101 are fixedly mounted at the four corners of the bottom of the testing platform 1.

[0058] As the cross-mounted frame 4 descends, the double-sided toothed plate 605 in the cover assembly 6 contacts the linkage gear 601. As the double-sided toothed plate 605 descends, it drives the linkage gear 601 to rotate. The two linkage gears 601 on the same side rotate in opposite directions, which causes the connecting plate 602 to rotate. The two light-shielding folding covers 2 are then driven to merge, thereby protecting the detection environment inside the light-shielding folding covers 2. This prevents external dust and impurities from continuing to contact the nanofiber membrane body 10 and also prevents external light from affecting the detection of the white light interferometric thickness sensor 9.

[0059] Based on the above-described scheme, and referring to Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 10The smoothing roller 8 is provided with a dust removal structure 7 on its outer side. The dust removal structure 7 includes a dust suction bin 701. A piston plate 704 is slidably provided on the inner side of the dust suction bin 701. Multiple stabilizing slide rods 703 are fixedly provided at the top of the piston plate 704. A top connecting plate 705 is fixedly provided at the other end of the stabilizing slide rod 703. A lifting contact rod 709 is symmetrically fixedly provided at the bottom end of the top connecting plate 705. Multiple return springs 702 are fixedly provided at the top of the dust suction bin 701. The return springs 702 are provided on the outer side of the stabilizing slide rods 703 and are fixedly provided at the bottom end of the piston plate 704.

[0060] When the smoothing roller 8 rotates, it will drive the striking block 710 to rotate together. It will contact the lifting rod 709 once every one rotation, so that the lifting rod 709 can drive the top connecting plate 705, the stabilizing slide rod 703 and the piston plate 704 to rise. At this time, the return spring 702 is in the extended state. When the striking block 710 leaves the lifting rod 709, the piston plate 704 quickly returns to its original position due to the elastic force of the return spring 702. The piston plate 704 completes one piston movement, thereby sucking the ash and fine impurities attached to the surface of the roller outer sleeve 801 into the ash inlet chamber 7011.

[0061] The ash suction bin 701 has an ash inlet chamber 7011 inside, and the piston plate 704 is located inside the ash inlet chamber 7011. The bottom and one side of the ash suction bin 701 are provided with an inlet and an outlet. A ash storage bin 711 is detachably provided on one side of the ash suction bin 701. The ash storage bin 711 is fitted into the outer sleeve 801 of the pressure roller.

[0062] The ash inlet chamber 7011 inside is used for piston movement of the piston plate 704, and the opening of the inlet notch allows dust and impurities outside the pressure roller outer sleeve 801 to be drawn into the ash inlet chamber 7011, and then enter the ash storage bin 711 through the inlet and outlet notch for collection and storage, which is convenient for centralized processing later.

[0063] Furthermore, the ash removal structure 7 also includes a fixed horizontal bar 706, with vertical support plates 708 fixedly installed at both ends of the fixed horizontal bar 706. The vertical support plates 708 are fixedly installed at the top of the side-connected rotating arm 403. A wool brush 707 is fixedly installed on the outside of the fixed horizontal bar 706, and the wool brush 707 is attached to the outer sleeve 801 of the pressure roller.

[0064] When the pressure roller jacket 801 rotates, it rubs against the wool brush 707, causing the surface of the pressure roller jacket 801 to become statically charged. This static electricity is used to adsorb dust and fine impurities on the top of the nanofiber membrane body 10, thereby improving the detection quality of the nanofiber membrane body 10.

[0065] Based on the above-described solution, this application embodiment also provides a thickness uniformity detection process for nanofiber membranes, including the following steps: the nanofiber membrane body 10 is laid flat on the top of the detection table 1. Depending on the thickness of the nanofiber membrane body 10, the variable diameter wheel structure 5 can be adjusted so that the smoothing roller 8 can apply uniform pressure to the nanofiber membrane body 10. During adjustment, the adjusting screw 501 is rotated so that the adjusting ring frame 502 moves and drives the adjusting connecting arm 503, so that the angle between the adjusting connecting arm 503 and the adjusting screw 501 changes. The change of the adjusting connecting arm 503 drives the arc plate 504 to expand outward or contract inward, thereby changing the overall diameter of the variable diameter wheel structure 5.

[0066] It should be noted that when the variable diameter wheel structure 5 descends, it will first contact the detection table 1. The difference between the diameter of the variable diameter wheel structure 5 and the diameter of the smoothing roller 8 is the thickness of the nanofiber membrane body 10. Therefore, it is not necessary to replace other smoothing rollers 8, and smoothing work can be performed on nanofiber membrane bodies 10 of different thicknesses, thereby improving the detection efficiency of nanofiber membrane bodies 10.

[0067] When the cross-mounted frame 4 descends, the double-sided toothed plate 605 will simultaneously mesh with the linkage gear 601 and drive it to rotate, so that the light-shielding folding cover 2 can cover the nanofiber membrane body 10 on the top of the detection stage 1 to prevent external light from entering and affecting the detection results.

[0068] As the smoothing roller 8 rolls, the friction between the wool brush 707 in the dust removal structure 7 and the roller outer sleeve 801 generates static electricity, which in turn adsorbs the dust and fine impurities on the top of the nanofiber membrane body 10. With the rotation of the smoothing roller 8, the piston plate 704 can generate piston movement, sucking the dust and fine impurities on the outside of the roller outer sleeve 801 into the dust storage bin 711 for temporary storage, which is convenient for later processing and prevents it from affecting the continuous adsorption work of the roller outer sleeve 801, thereby improving the detection quality of the nanofiber membrane body 10.

[0069] Working principle: When the thickness uniformity of the nanofiber membrane body 10 is detected, the hydraulic rod 3 is driven by the external hydraulic cylinder, which drives the cross frame 4 to descend. After descending, the variable diameter wheel structure 5 first contacts the top of the detection table 1, and at the same time the pressure roller outer sleeve 801 contacts the nanofiber membrane body 10. As the cross frame 4 descends, the variable diameter wheel structure 5 and the smoothing pressure roller 8 will roll. The rolling of the smoothing pressure roller 8 can smooth the nanofiber membrane body 10 and prevent wrinkles on the surface of the nanofiber membrane body 10.

[0070] As the cross-mounted frame 4 descends, the double-sided toothed plate 605 in the cover assembly 6 will contact the linkage gear 601, and as the double-sided toothed plate 605 descends, it will drive the linkage gear 601 to rotate. The two linkage gears 601 on the same side rotate in opposite directions, which will cause the connecting plate 602 to rotate. The two light-shielding folding covers 2 will be driven to merge, thereby protecting the detection environment inside the light-shielding folding covers 2. This will prevent external dust and impurities from continuing to contact the nanofiber membrane body 10, and also prevent external light from affecting the detection of the white light interference thickness sensor 9.

[0071] Furthermore, due to the variable diameter wheel structure 5, the height between the white light interferometric thickness sensor 9 and different thicknesses is the same, and under the same conditions, more accurate detection results can be obtained;

[0072] When the double-sided toothed plate 605 is raised, the linkage gear 601 will rotate in the opposite direction, causing the connecting plate 602 to move in the opposite direction. At this time, the light-shielding folding cover 2 will open, take out the tested nanofiber membrane body 10, and put in the nanofiber membrane body 10 to be tested. It is simple and convenient to use.

[0073] As the pressure roller outer sleeve 801 rotates, it will rub against the wool brush 707, causing the surface of the pressure roller outer sleeve 801 to become static. During the rotation, it can adsorb dust and fine impurities on the top of the nanofiber membrane body 10, thereby improving the detection accuracy of the thickness uniformity of the nanofiber membrane body 10.

[0074] Simultaneously, the rotation of the smoothing roller 8 will cause the striking block 710 to rotate together. Each rotation will contact the lifting rod 709 once, so that the lifting rod 709 can drive the top connecting plate 705, the stabilizing slide rod 703 and the piston plate 704 to rise. At this time, the return spring 702 is in the extended state. When the striking block 710 leaves the lifting rod 709, the piston plate 704 quickly returns to its original position due to the elastic force of the return spring 702. The piston plate 704 completes one piston movement, thereby sucking the dust and fine impurities attached to the surface of the roller outer sleeve 801 into the ash inlet chamber 7011, and into the ash storage bin 711 through the inlet and outlet notches. It should be noted that the ash storage bin 711 is set in a "┐" shape to prevent the dust and impurities entering the ash storage bin 711 from flowing out. This allows the roller outer sleeve 801 to continuously adsorb the dust and fine impurities on the top of the nanofiber membrane body 10, thereby improving the detection quality of the nanofiber membrane body 10.

[0075] When testing nanofiber membrane bodies 10 of different thicknesses, rotating the turntable 5011 in the variable diameter wheel structure 5 drives the adjusting screw 501 to rotate. The rotation of the adjusting screw 501 causes the adjusting ring frame 502 to move, making the angle between the adjusting arm 503 and the adjusting screw 501 larger or smaller, thereby causing the arc plate 504 to expand or contract. When the angle between the adjusting arm 503 and the adjusting screw 501 increases, the arc plate 504 is in an expanded state; conversely, the arc plate 504 is in a contracted state. In the contracted state, and with the minimum diameter of the variable diameter wheel structure 5 being the same as the outer diameter of the pressure roller outer sleeve 801, the variable diameter wheel structure 5 can first contact the detection table 1. The diameter difference between the variable diameter wheel structure 5 and the pressure roller outer sleeve 801 is the thickness of the nanofiber membrane body 10. This eliminates the need to replace other smoothing pressure rollers 8, improving the detection efficiency of the nanofiber membrane body 10. Furthermore, it ensures that the pressure provided by the smoothing pressure roller 8 to the nanofiber membrane body 10 is uniform and gentle, without excessively compressing the nanofiber membrane body 10, further improving the detection accuracy.

[0076] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0077] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. A device for detecting the thickness uniformity of nanofiber membranes, characterized in that: include: The testing station (1) is equipped with a white light interferometric thickness sensor (9). A horizontal support frame (4) is provided with symmetrically rotating side arms (403) on both sides. A smoothing roller (8) is provided on the side of the side arms (403) that are close to each other, and a variable diameter wheel structure (5) is provided on the side of the side arms (403) that are far apart from each other. The variable diameter wheel structure (5) is used to change the smoothing height of the smoothing roller (8). The variable diameter wheel structure (5) includes an adjusting screw (501), an adjusting ring frame (502) is threaded to the outside of the adjusting screw (501), and multiple adjusting arms (503) are rotatably arranged on the outside of the adjusting ring frame (502), and the adjusting arms (503) are inclined. An arc plate (504) is rotatably provided at the other end of the adjusting arm (503); a connecting plate (5012) is rotatably provided at one end of the adjusting screw (501); a turntable (5011) is fixedly provided at the other end of the adjusting screw (501); and a connecting short rod (5013) is fixedly provided at the other end of the connecting plate (5012). The other end of the connecting rod (5013) is fixedly provided with a striking block (710), the striking block (710) is fixedly provided at both ends of the smoothing roller (8), and the connecting rod (5013) passes through and is rotatably provided on one side of the side-connecting rotating arm (403).

2. The thickness uniformity detection device for nanofiber membranes as described in claim 1, characterized in that, A hydraulic rod (3) is provided above the testing platform (1), and the hydraulic rod (3) is fixedly installed at the top of the cross frame (4); The bottom end of the transverse support frame (4) is provided with a transverse movement mechanism (401) and a longitudinal movement mechanism (402). The white light interferometric thickness sensor (9) is located at the bottom of the longitudinal movement mechanism (402), and the white light interferometric thickness sensor (9) is electrically connected to an external data analyzer.

3. The thickness uniformity detection device for nanofiber membranes as described in claim 2, characterized in that, The testing platform (1) is symmetrically fixed with light-shielding folding covers (2) on both sides. Magnets (201) are symmetrically fixed on the side of the light-shielding folding covers (2) that are close to each other. The magnets (201) that are close to each other are arranged with opposite poles. The four corners of the bottom of the testing platform (1) are fixed with feet (101).

4. The thickness uniformity detection device for nanofiber membranes as described in claim 1, characterized in that, A stabilizing telescopic rod (505) is fixedly installed on the inner side of the arc plate (504), and a fixed rod connecting plate (506) is fixedly installed at the other end of the stabilizing telescopic rod (505). A fixing pad (507) is fixedly provided on one side of the fixed rod connecting plate (506), and the fixing pad (507) is rotatably disposed on the outside of one end of the adjusting screw (501). The fixed pad (507) is symmetrically fixed with a sliding connecting rod (508). When the adjusting ring frame (502) moves, it will slide along the sliding connecting rod (508) to stabilize the position change of the adjusting ring frame (502). The sliding connecting rod (508) is fixedly connected to the connecting plate (5012).

5. The thickness uniformity detection device for nanofiber membranes as described in claim 3, characterized in that, Cover assemblies (6) are provided on both sides of the testing station (1). The cover assembly (6) includes a linkage gear (601), one end of which is fixedly provided with a connecting plate (602). The connecting plate (602) is fixedly provided on one side of the light-shielding folding cover (2). A double-sided toothed plate (605) is meshed on the outer side of the linkage gear (601). The double-sided toothed plate (605) is fixedly connected to the cross frame (4) through a connecting plate and a fixed rod (606).

6. The thickness uniformity detection device for nanofiber membranes as described in claim 5, characterized in that, A fixed bracket (603) is rotatably provided on the outer side of one end of the linkage gear (601), and a side bracket (604) is rotatably provided on both sides of the bottom end of the light-shielding folding cover (2). The side bracket (604) is fixedly provided on one side of the fixed bracket (603), and the fixed bracket (603) is detachably provided on the bottom end of the testing table (1).

7. The thickness uniformity detection device for nanofiber membranes as described in claim 5, characterized in that, The smoothing roller (8) is provided with a dust removal structure (7) on its outer side, and a roller outer sleeve (801) is fixedly provided on its outer side. The ash removal structure (7) includes an ash suction bin (701), a piston plate (704) is slidably arranged on the inner side of the ash suction bin (701), a plurality of stabilizing slide rods (703) are fixedly arranged at the top end of the piston plate (704), a top connecting plate (705) is fixedly arranged at the other end of the stabilizing slide rod (703), and a lifting contact rod (709) is symmetrically fixedly arranged at the bottom end of the top connecting plate (705). The top of the dust collection bin (701) is fixedly provided with a plurality of return springs (702), the return springs (702) are provided on the outside of the stabilizing slide bar (703), and the return springs (702) are fixedly provided on the bottom end of the piston plate (704).

8. The thickness uniformity detection device for nanofiber membranes as described in claim 7, characterized in that, The ash suction bin (701) is provided with an ash inlet chamber (7011) inside. The piston plate (704) is located inside the ash inlet chamber (7011). The bottom and one side of the ash suction bin (701) are provided with an inlet and an outlet. A ash storage bin (711) is detachably provided on one side of the ash suction bin (701). The ash storage bin (711) is fitted to the outer sleeve (801) of the pressure roller.

9. The thickness uniformity detection device for nanofiber membranes as described in claim 8, characterized in that, The dust removal structure (7) also includes a fixed crossbar (706), with vertical support plates (708) fixedly installed at both ends of the fixed crossbar (706). The vertical support plates (708) are fixedly installed at the top of the side-connected rotating arm (403). A wool brush (707) is fixedly installed on the outside of the fixed crossbar (706), and the wool brush (707) is attached to the outer sleeve (801) of the pressure roller.

10. A process for detecting the thickness uniformity of nanofiber membranes, characterized in that, The thickness uniformity detection device for nanofiber membranes as described in claim 9 includes the following steps: The nanofiber membrane body (10) is laid flat on the top of the detection stage (1); Depending on the thickness of the nanofiber membrane body (10), the variable diameter wheel structure (5) can be adjusted so that the smoothing roller (8) can apply uniform pressure to the nanofiber membrane body (10). During adjustment, rotating the adjusting screw (501) causes the adjusting ring frame (502) to move and drive the adjusting connecting arm (503), causing the angle between the adjusting connecting arm (503) and the adjusting screw (501) to change. The change in the adjusting connecting arm (503) drives the arc plate (504) to expand outward or contract inward, thereby changing the overall diameter of the variable diameter wheel structure (5). When the variable diameter wheel structure (5) descends, it will first contact the detection table (1). The difference between the diameter of the variable diameter wheel structure (5) and the diameter of the smoothing roller (8) is the thickness of the nanofiber membrane body (10). When the horizontal support frame (4) descends, the double-sided toothed plate (605) will simultaneously mesh with the linkage gear (601) and drive it to rotate, so that the light-shielding folding cover (2) can cover the nanofiber membrane body (10) on the top of the detection stage (1) to prevent external light from entering and affecting the detection results. While the smoothing roller (8) is rolling, the wool brush (707) in the dust removal structure (7) and the roller outer sleeve (801) generate static electricity through friction, which in turn adsorbs the dust and fine impurities on the top of the nanofiber membrane body (10). As the smoothing roller (8) rotates, the piston plate (704) can generate piston movement, which sucks the dust and fine impurities outside the roller outer sleeve (801) into the ash storage bin (711) for temporary storage, so as to improve the detection quality of the nanofiber membrane body (10).

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