A kind of wind knife online adjusting device for diaphragm production line corrosion environment

Abstract

The application discloses a kind of wind knife online adjusting device for diaphragm production line corrosion environment, belong to the technical field of film production and processing, device includes wind knife, mobile device and external motor driven rotating device, transmission mechanism is equipped with axial sliding adaptation structure.This device double-regulation action does not interfere with each other and can be operated synchronously, online parameter adjustment does not need to stop, ensures that production line is continuously operated;Drive motor is isolated from corrosive medium, solves the problem of easily damaged control in tank;High precision of automatic synchronous angle adjustment, wide film drying is uniform, improve yield rate;Reduce equipment start-stop loss and energy consumption, avoid personnel into groove high-risk operation, give consideration to production efficiency and job safety.

Description

Technical Field

[0001] This invention relates to the field of thin film production and processing technology, and in particular to an online air knife adjustment device for use in the corrosive environment of a diaphragm production line. Background Technology

[0002] In the extraction process of lithium battery separator production, the equipment is in a highly corrosive, closed, and toxic extractant environment for a long time. This environment places extremely high demands on the corrosion resistance of the equipment materials, electrical layout, structural sealing, and movement stability, making it a core high-risk operating condition in separator production.

[0003] After the extraction process, the residual extractant on the membrane needs to be dried. Air knives are commonly used in the industry for this purpose. The distance between the air knife and the membrane, and the air outlet angle at the lip, directly determine the uniformity of membrane drying and the quality of the finished product. Currently, the drying effect is controlled by adjusting the airflow rate of the air knife, but simply changing the airflow rate is insufficient to meet process requirements. Therefore, the air knife angle needs to be adjusted during production. The required distance between the air knife lip and the membrane is too small to meet the membrane penetration requirements, so the air knife needs to be movable.

[0004] The technology suffers from significant limitations in adapting to different scenarios: First, the corrosive, enclosed environment makes it impossible to install precision electrical components such as motors and control systems. The angle adjustment of traditional air knives can only be done manually by entering the tank after stopping the machine, draining the liquid, and ventilating to depressurize. This makes online adjustment impossible, and frequent shutdowns severely disrupt continuous production, resulting in significant capacity losses. Second, in corrosive environments, conventional metal transmission and sliding parts are prone to rust, jamming, and wear, leading to inaccurate adjustment, high equipment failure rates, and short service lives. There are no dedicated anti-corrosion structures suitable for these conditions. Third, manual adjustment cannot guarantee the synchronization of the angles at both ends of the air knife, resulting in poor consistency in the drying of wide-width films, low product yield, and difficulty in meeting the production needs of large-scale, high-quality diaphragms.

[0005] Therefore, developing an online adjustment device for wide-width air knives in corrosive environments for thin film production lines to solve the above problems has become an urgent issue. Summary of the Invention

[0006] This invention provides an online air knife adjustment device for use in corrosive environments of diaphragm production lines, in order to overcome the above-mentioned problems.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: An online adjustment device for an air knife in a corrosive environment of a diaphragm production line includes an air knife, a moving device, and a rotating device; The air knife is used to dry the film to be dried in a corrosive environment; The moving device is located on one side of the air knife and is used to drive the air knife to move in a straight line in a corrosive environment in order to adjust the distance between the air knife and the film. The rotating device has a drive motor located outside the corrosive environment. The drive motor can drive the air knife to rotate around its own axis through a transmission mechanism to adjust the angle of the air knife lip. The transmission mechanism has an axial sliding adaptation structure, which enables the linear movement and angular rotation of the air knife to be independent and non-interfering with each other, so as to realize the synchronous operation of the two actions. The interior of the sealed extraction tank is the corrosive environment described above.

[0008] Furthermore, the moving device includes a cylinder, a first bearing seat, an air knife shaft, a moving plate, a linear guide rail, a support plate, and a mounting plate; the air knife includes a drying air knife, which is mounted on the air knife shaft of the moving device; the mounting plate is located on the inner wall of the extraction tank, the support plate is located on the mounting plate, the cylinder is located on the mounting plate, the linear guide rail is mounted on the support plate, the first bearing seat is mounted on the linear guide rail via the moving plate and a slider, the air knife shaft is mounted on the first bearing seat, the first bearing seat is connected to the cylinder, and the cylinder can drive the first bearing seat to move along the linear guide rail, simultaneously driving the air knife shaft and the air knife to move along the linear guide rail, so as to adjust the distance between the air knife and the film.

[0009] Furthermore, an adjustment support plate is fixed on the wall of the extraction tank; The transmission mechanism includes a rotating worm wheel, a rotating worm, an adjusting worm wheel, and an adjusting worm; the adjusting worm wheel and the adjusting worm are mounted on an adjusting support plate, and the drive motor is located outside the extraction tank; the adjusting worm is connected to the drive motor, and the adjusting worm meshes with the adjusting worm wheel; The axial sliding adapter structure consists of a rotating worm, an adjusting worm wheel, and a matching sliding spline pair between the two; The rotating worm gear is located on the end of the air knife shaft that extends out of the first bearing seat. One end of the rotating worm meshes with the rotating worm gear, and the other end of the rotating worm passes through the adjusting support plate. This end is provided with an external spline and is assembled with the internal spline of the adjusting worm gear through a sliding spline engagement. This allows the drive motor to rotate and drive the rotating worm and rotating worm gear to rotate through the adjusting worm and adjusting worm gear. It also allows the rotating worm to move linearly inside the adjusting worm gear when the moving device drives the air knife to make linear motion.

[0010] Furthermore, the inner lining of the slider is a non-metallic wear-resistant sliding film, and the material of the non-metallic wear-resistant sliding film is polyetheretherketone (PEEK). The rotating worm gear and the adjusting worm gear are both made of corrosion-resistant non-metallic material, which is polyetheretherketone (PEEK).

[0011] Furthermore, the moving device also includes a cylinder seat, a cylinder mounting plate, a bottom plate, a top plate, a third bearing, and a limiting device; The base plate and top plate are respectively fixed to the upper and lower ends of the first bearing seat; a cylinder mounting plate is fixed on the base plate; the cylinder is mounted on the mounting plate through the cylinder seat, and the piston end of the cylinder is fixedly connected to the cylinder mounting plate; the limiting device is disposed on the base plate and between the base plate and the top plate; The air knife shaft is mounted on the first bearing seat via the third bearing; The bottom of the adjusting support plate is provided with a limiting plate.

[0012] Furthermore, the rotating device also includes a second bearing housing, a second bearing, and a motor flange; The second bearing seat is fixed on the adjusting support plate, the adjusting worm is mounted on the second bearing seat through the second bearing, and the drive motor is mounted outside the extraction tank through the motor flange.

[0013] Furthermore, the air knife also includes a flexible hose, a crossbeam, an air knife side mounting plate, and an air knife pipeline; The two ends of the drying air knife are fixedly connected to the crossbeam, and the air knife side mounting plates are fixed on both sides of the drying air knife. One end of the hose is connected to the air knife pipeline, and the other end of the hose passes through the air knife side mounting plate and is connected to the drying air knife. The air knife pipeline is equipped with multiple air outlets, and each air outlet is equipped with an air valve.

[0014] Furthermore, the drying air knife has a width-side air inlet, and multiple perforated plates for support and air distribution are arranged at intervals along the width direction inside the drying air knife, forming a multi-level gradient air distribution structure from the air inlet to the air knife lip.

[0015] Furthermore, it also includes a control system, which is electrically connected to the drive motor, cylinder, and each air outlet valve. The control system is used to preset drying process parameters, automatically control the extension and retraction stroke of the cylinder online, control the rotation angle, speed, and start / stop of the drive motor, and independently adjust the opening degree of each air valve.

[0016] The beneficial effects of this invention are: 1. This device uses a decoupled structure between the moving and rotating devices to achieve independent operation of both linear spacing adjustment and angle rotation adjustment of the air knife without structural interference. It can complete process parameter adjustment without stopping the production line, and is especially suitable for installation in corrosive environments with limited space. 2. By setting the drive motor outside the corrosive environment, the precision electrical components are completely separated from the highly corrosive and toxic sealed environment of the extraction tank, which fundamentally solves the industry pain point that it is impossible to install electrical control and regulation equipment in corrosive environments, eliminates corrosion damage to electrical components, and is suitable for the high-risk extraction conditions of diaphragm production lines. 3. Process adjustments can be completed without frequent start-ups and shutdowns of the production line, significantly reducing energy consumption and equipment wear caused by repeated start-ups and shutdowns. At the same time, it eliminates the safety hazards of personnel manually operating in toxic, harmful, or corrosive environments, achieving the goal of safe and environmentally friendly production. 4. By controlling the motor drive through a program, the angles at both ends of the air knife can be adjusted synchronously with high precision. This overcomes the defect that manual adjustment makes it difficult to ensure consistency at both ends, ensuring the drying uniformity of wide films in the width direction, thereby improving the overall performance and yield of the product. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram (axial direction) of an online air knife adjustment device for a corrosive environment in a diaphragm production line disclosed in an embodiment of the present invention. Figure 2 This is a schematic diagram (front view) of an online air knife adjustment device for a corrosive environment in a diaphragm production line, as disclosed in an embodiment of the present invention. Figure 3 for Figure 2 Cross-sectional view along the BB direction; Figure 4 for Figure 2 A cross-sectional view along the CC direction; Figure 5 for Figure 3 Cross-sectional view along the EE direction; Figure 6 for Figure 2 A cross-sectional view along the AA direction; Figure 7 for Figure 2 A cross-sectional view along the DD direction.

[0019] In the diagram: 1. Air knife; 11. Drying air knife; 12. Hose; 13. Crossbeam; 14. Air knife side mounting plate; 15. Air knife pipeline; 2. Moving device; 21. Cylinder seat; 22. Cylinder; 23. Cylinder mounting plate; 24. Base plate; 25. First bearing seat; 26. Top plate; 27. Air knife shaft; 28. Moving plate; 29. ​​Linear guide rail; 210. Support plate; 211. Mounting plate; 212. Limiting device; 213. Limiting block; 214. Third bearing; 215. Slider; 3. Rotating device; 31. Rotating worm gear; 32. Rotating worm; 33. First bearing; 34. Limiting plate; 35. Adjusting worm gear; 36. Adjusting worm; 37. Second bearing seat; 38. Second bearing; 39. Coupling; 310. Sealing gasket; 311. Motor flange; 312. Drive motor; 313. Adjusting support plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1-7 The image shows an online air knife adjustment device for a corrosive environment in a diaphragm production line provided in this embodiment, including an air knife 1, a moving device 2, and a rotating device 3; The air knife 1 is used to dry the film to be dried in a corrosive environment; The moving device 2 is located on one side of the air knife 1 and is used to drive the air knife 1 to move in a straight line in a corrosive environment in order to adjust the distance between the air knife and the film. The rotating device 3 has its drive motor 312 located outside the corrosive environment to avoid corrosion. The drive motor 312 can drive the air knife 1 to rotate around its own axis through the transmission mechanism to adjust the angle of the air knife lip. The transmission mechanism has an axial sliding adaptation structure, which enables the linear movement and angular rotation of the air knife to be independent and non-interfering with each other, and realizes the synchronous execution of the two movements. The interior of the sealed extraction tank is the corrosive environment described above.

[0022] The transmission mechanism features an axial sliding adaptation structure, allowing for adaptive sliding and avoidance during linear spacing adjustment of the air knives. This eliminates mechanical interference in the transmission components, enabling the device to simultaneously adjust both the air knife spacing and outlet angle in the closed, corrosive environment of the extraction tank without shutdown, ensuring continuous production line operation. The device employs a decoupled structure between the moving and rotating components, achieving independent synchronous adjustment of both the linear spacing and outlet angle of the air knives without mechanical interference. Process parameters can be adjusted online without shutdown, adapting to the closed, restricted corrosive conditions of the extraction tank. The drive motor is externally mounted in the tank, completely isolating precision electrical components from the corrosive medium and preventing corrosion and failure of electrical control elements. Automated program control achieves high-precision synchronous adjustment of the air knife angle, replacing manual adjustment by inserting the device into the tank. This reduces energy consumption and losses during equipment start-up and shutdown, eliminates safety hazards associated with high-risk operations, and ensures uniform drying of wide-width films, effectively improving product yield.

[0023] In a specific embodiment, the moving device 2 includes a cylinder 22, a first bearing seat 25, an air knife shaft 27, a moving plate 28, a linear guide rail 29, a support plate 210, and a mounting plate 211; the air knife 1 includes a drying air knife 11, which is mounted on the air knife shaft 27 of the moving device 2; the mounting plate 211 is located on the inner wall of the extraction tank, the support plate 210 is mounted on the mounting plate 211, the cylinder 22 is mounted on the mounting plate 211, the linear guide rail 29 is mounted on the support plate 210, the first bearing seat 25 is mounted on the linear guide rail 29 via the moving plate 28 and the slider 215, the air knife shaft 27 is mounted on the first bearing seat 25, the first bearing seat 25 is connected to the cylinder 22, and the cylinder 22 can drive the first bearing seat 25 to move along the linear guide rail 29, simultaneously driving the air knife shaft 27 and the air knife 1 to move along the linear guide rail 29, so as to adjust the distance between the air knife and the film.

[0024] A stable linear adjustment mechanism is formed by cylinder 22, linear guide rail 29, first bearing seat 25, and air knife shaft 27. The linear guide rail 29 ensures that the air knife 1 moves in a straight and stable trajectory, the cylinder 22 provides stable power, and the air knife shaft 27 cooperates with the first bearing seat 25 to ensure that the air knife 1 is firmly mounted. It can accurately adjust the drying distance between the air knife 1 and the film online. The structure is simple and reliable, and it can withstand long-term repetitive operation in corrosive environments without jamming or offset problems.

[0025] In a specific embodiment, an adjustment support plate 313 is fixed on the wall of the extraction tank; The transmission mechanism includes a rotating worm wheel 31, a rotating worm 32, an adjusting worm wheel 35, and an adjusting worm 36; the adjusting worm wheel 35 and the adjusting worm 36 are mounted on an adjusting support plate 313, and the drive motor 312 is located outside the extraction tank; the adjusting worm 36 is connected to the drive motor 312, and the adjusting worm 36 meshes with the adjusting worm wheel 35. The axial sliding adapter structure consists of a rotating worm 32, an adjusting worm wheel 35, and a matching sliding spline pair between the two; The rotating worm gear 31 is located on the end of the air knife shaft 27 that extends out of the first bearing seat 25. One end of the rotating worm 32 meshes with the rotating worm gear 31, and the other end of the rotating worm 32 passes through the adjusting support plate 313. This end is provided with an external spline and is assembled with the internal spline of the adjusting worm gear 35 through a sliding spline engagement. This allows the drive motor 312 to rotate and drive the rotating worm 32 and the rotating worm gear 31 to rotate through the adjusting worm 36 and the adjusting worm gear 35. It also allows the rotating worm 32 to move linearly inside the adjusting worm gear 35 when the moving device 2 drives the air knife 1 to make linear movements.

[0026] The rotating worm gear 31 is mounted on the air knife shaft 27 via a flat key and a locking nut. The rotation of the drive motor 312 drives the adjusting worm 36, which in turn drives the adjusting worm gear 35 meshing with the adjusting worm 36 to rotate. The adjusting worm gear 35 drives the rotating worm 32 to rotate via an internal spline, causing the rotating worm gear 31 meshing with the rotating worm 32 to rotate. The rotating worm gear 31 drives the air knife shaft 27 to rotate and adjusts the air outlet angle of the air knife on the air knife shaft 27. When the air knife moves, the adjusting worm gear 35 is kept stationary. At this time, the rotating worm 32 moves inside the adjusting worm gear 35, thereby avoiding interference when the rotating device 3 moves linearly with the air knife.

[0027] A two-stage worm gear transmission mechanism, consisting of adjusting worm 35, adjusting worm 36, rotating worm 31, and rotating worm 32, achieves precise power transmission. It boasts high transmission accuracy and self-locking capability, allowing for long-term locking of the air knife 1 adjustment angle even in corrosive environments, preventing parameter deviations caused by equipment vibration and media erosion. A spline sliding fit structure enables simultaneous linear and rotary movements without interference. During linear movement of the air knife 1, rotating worm 32 can adaptively slide axially, completely resolving the dynamic-static interference problem of traditional structures and ensuring the stability of online dual-dimensional parameter adjustment.

[0028] In a specific embodiment, the inner lining of the slider 215 is a non-metallic wear-resistant sliding film, and the material of the non-metallic wear-resistant sliding film is polyetheretherketone (PEEK). The rotating worm wheel 31 and the adjusting worm wheel 35 are both made of corrosion-resistant non-metallic material, which is polyetheretherketone (PEEK).

[0029] The sliding diaphragm of slider 215, rotating worm gear 31, and adjusting worm gear 35 are all made of PEEK anti-corrosion and wear-resistant material, replacing traditional easily corroded metal parts. By utilizing the characteristics of PEEK such as resistance to extractant corrosion, self-lubrication, and wear resistance, the corrosion, jamming, and wear failure of core moving parts in corrosive environments are greatly reduced, extending the service life of the equipment and reducing the frequency and cost of equipment maintenance in corrosive environments.

[0030] In a specific embodiment, the mobile device 2 further includes a cylinder seat 21, a cylinder mounting plate 23, a bottom plate 24, a top plate 26, a third bearing 214, and a limiting device 212; The base plate 24 and the top plate 26 are respectively fixed to the upper and lower ends of the first bearing seat 25; a cylinder mounting plate 23 is fixed on the base plate 24; the cylinder 22 is mounted on the mounting plate 211 through the cylinder seat 21, and the piston end of the cylinder 22 is fixedly connected to the cylinder mounting plate 23; the limiting device 212 is disposed on the base plate 24 and between the base plate 24 and the top plate 26; The air knife shaft 27 is mounted on the first bearing seat 25 via the third bearing 214; The bottom of the adjusting support plate 313 is provided with a limiting plate 34.

[0031] The limiting plate 34 is used to vertically mechanically limit the top plate 26, limiting the maximum linear travel of the air knife 1 and preventing overtravel collisions. The limiting device 212 has a limiting block 213, and the limiting plate 34 is equipped with a position sensor. The position sensor is electrically connected to the control system and can collect the linear displacement data of the air knife 1 in real time, realizing accurate displacement feedback, overtravel warning, and automatic shutdown protection. The limiting plate 34 and the limiting block 213 constitute a double mechanical limiting structure, which together limit the linear travel of the air knife 1, preventing the air knife 1 from colliding with the film, tank, and transmission components due to overtravel, and avoiding equipment damage and product scrapping in corrosive environments. The position sensor enables real-time displacement monitoring and closed-loop protection, which can quickly respond to overtravel faults and automatically shut down, realizing unattended automated operation in corrosive environments, greatly improving the safety and adjustment accuracy of equipment operation. The third bearing 214 provides stable rotational support for the air knife shaft 27, ensuring that the air knife shaft 27 rotates and moves smoothly without jamming, and is suitable for long-term, high-frequency online adjustment operations.

[0032] In a specific embodiment, the rotating device 3 further includes a second bearing seat 37, a second bearing 38, and a motor flange 311; The second bearing seat 37 is fixed on the adjusting support plate 313. The adjusting worm 36 is mounted on the second bearing seat 37 through the second bearing 38. The drive motor 312 is mounted outside the extraction tank through the motor flange 311. The top plate 26 and the bottom plate 24 are both provided with the first bearing 33. The rotating worm 32 is rotatably mounted on the top plate 26 and the bottom plate 24 through the first bearing 33.

[0033] In this embodiment, one end of the adjusting worm gear 36 is connected to the drive motor 312 via a coupling 39, and the motor flange 311 is sealed to the extraction tank wall via the sealing gasket 310.

[0034] The sealing gasket 310 is made of corrosion-resistant soft foamed fluororubber, which can effectively isolate the corrosive media and toxic gases inside the tank from leakage, while protecting the external motor and transmission connection structure from corrosion. The foamed fluororubber sealing gasket and motor flange achieve complete sealing of the tank assembly position, effectively preventing the leakage of corrosive media and toxic extraction gases from the tank, reducing safety hazards, and preventing external impurities from entering the transmission structure, providing comprehensive protection for the precision components inside the tank. The second bearing seat 37 and the second bearing 38 provide stable support for the adjusting worm gear 36, ensuring smooth power transmission of the external drive motor 312, reducing transmission errors, improving angle adjustment accuracy, and adapting to long-term stable operation in corrosive environments.

[0035] In a specific embodiment, the air knife 1 further includes a flexible hose 12, a crossbeam 13, an air knife side mounting plate 14, and an air knife pipeline 15; The two ends of the drying air knife 11 are fixedly connected to the crossbeam 13. Air knife side mounting plates 14 are fixed on both sides of the drying air knife 11. One end of the hose 12 is connected to the air knife pipeline 15, and the other end of the hose 12 passes through the air knife side mounting plate 14 and is connected to the drying air knife 11. The air knife pipe 15 is equipped with multiple air outlets, each with an air valve. The airflow and pressure of each outlet can be individually adjusted to compensate for differences in air resistance along the width of the diaphragm, ensuring uniform airflow and consistent drying across the entire diaphragm. This solves the quality problem of uneven drying of wide-width diaphragms and improves product yield. A corrosion-resistant flexible hose 12 is used to connect the air knife 1, adapting to the dynamic displacement of the air knife 1's movement and rotation, preventing rigid pipes from breaking or leaking under corrosive conditions.

[0036] In a specific embodiment, the drying air knife 11 has a width-side air inlet, and multiple perforated plates for support and air distribution are arranged at intervals along the width direction inside the drying air knife 11, forming a multi-level gradient air distribution structure from the air inlet to the air knife lip.

[0037] The wide-width side air intake ensures stable air pressure and low loss. The multi-stage air distribution plate can gradually divert, rectify, and stabilize the high-pressure airflow entering the air knife, eliminating airflow turbulence and local pressure unevenness. At the same time, the multi-layer perforated plate can serve as an internal support structure for the drying air knife 11, preventing deformation of the wide-width drying air knife 11 due to long-term high-pressure air output. Ultimately, it achieves uniform air output across the entire width of the drying air knife 11 lip, making it suitable for high-precision drying processes of wide-width diaphragm films.

[0038] In a specific embodiment, a control system is also included. The control system is electrically connected to the drive motor 312, the cylinder 22, the position sensor, and the air valves at each air outlet. The control system is used to preset drying process parameters, automatically control the extension and retraction stroke of the cylinder 22 online, and precisely adjust the drying distance between the air knife and the film. The control system is used to precisely control the rotation angle, speed, and start / stop of the drive motor 312, independently adjust the opening of each air valve to adapt to the drying requirements of films of different specifications, and receive displacement signals from the position sensor in real time to achieve closed-loop precise control and overtravel fault protection. No manual intervention is required throughout the process, enabling automated continuous production in corrosive environments.

[0039] The control system enables fully automated closed-loop control of the entire equipment, eliminating the need for manual entry into highly corrosive tanks. It automatically adjusts spacing, angle, and airflow precisely, and provides fault protection throughout the entire process, significantly improving production automation and reducing human safety risks and production costs. The control system and position sensors mentioned are existing components; their more detailed principles will not be elaborated here.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An online air knife adjustment device for a corrosive environment in a diaphragm production line, characterized in that, Includes air knife (1), moving device (2), and rotating device (3); The air knife (1) is used to dry the film to be dried in a corrosive environment; The moving device (2) is located on one side of the air knife (1) and is used to drive the air knife (1) to move in a straight line in a corrosive environment in order to adjust the distance between the air knife and the film. The rotating device (3) has a drive motor (312) located outside the corrosive environment. The drive motor (312) can drive the air knife (1) to rotate around its own axis through the transmission mechanism to adjust the angle of the air knife lip. The transmission mechanism has an axial sliding adaptation structure, which enables the linear movement and angular rotation of the air knife to be independent of each other and not interfere with each other, so as to realize the synchronous operation of the two actions of linear movement and angular rotation. The interior of the sealed extraction tank is the corrosive environment described above; The moving device (2) includes a cylinder (22), a first bearing seat (25), an air knife shaft (27), a moving plate (28), a linear guide rail (29), a support plate (210), and a mounting plate (211); the air knife (1) includes a drying air knife (11), which is mounted on the air knife shaft (27) of the moving device (2); the mounting plate (211) is mounted on the inner wall of the extraction tank, the support plate (210) is mounted on the mounting plate (211), the cylinder (22) is mounted on the mounting plate (211), and the linear guide rail (29) is mounted on the moving device (28). The guide rail (29) is mounted on the support plate (210). The first bearing seat (25) is mounted on the linear guide rail (29) via the moving plate (28) and the slider (215). The air knife shaft (27) is mounted on the first bearing seat (25). The first bearing seat (25) is connected to the cylinder (22). The cylinder (22) can drive the first bearing seat (25) to move along the linear guide rail (29) and simultaneously drive the air knife shaft (27) and the air knife (1) to move along the linear guide rail (29) to adjust the distance between the air knife (1) and the film. An adjusting support plate (313) is fixed on the wall of the extraction tank. The transmission mechanism includes a rotating worm wheel (31), a rotating worm (32), an adjusting worm wheel (35), and an adjusting worm (36); the adjusting worm wheel (35) and the adjusting worm (36) are mounted on an adjusting support plate (313), and the drive motor (312) is located outside the extraction tank; the adjusting worm (36) is connected to the drive motor (312), and the adjusting worm (36) meshes with the adjusting worm wheel (35); The axial sliding adapter structure consists of a rotating worm (32), an adjusting worm wheel (35), and a sliding spline pair that matches the two. The rotating worm gear (31) is located on the end of the air knife shaft (27) extending out of the first bearing seat (25). One end of the rotating worm (32) meshes with the rotating worm gear (31), and the other end of the rotating worm (32) passes through the adjusting support plate (313). The other end is provided with an external spline and is assembled with the internal spline of the adjusting worm gear (35) by sliding spline engagement. This allows the drive motor (312) to rotate and drive the rotating worm gear (32) and the rotating worm gear (31) to rotate through the adjusting worm gear (36) and the adjusting worm gear (35). It also allows the rotating worm gear (32) to move linearly inside the adjusting worm gear (35) when the moving device (2) drives the air knife (1) to make linear motion.

2. The online air knife adjustment device for a corrosive environment in a diaphragm production line according to claim 1, characterized in that, The inner lining of the slider (215) is a non-metallic wear-resistant sliding film, and the material of the non-metallic wear-resistant sliding film is polyetheretherketone (PEEK). The rotating worm wheel (31) and adjusting worm wheel (35) are both made of corrosion-resistant non-metallic material, which is polyether ether ketone (PEEK).

3. The online air knife adjustment device for a corrosive environment in a diaphragm production line according to claim 1, characterized in that, The moving device (2) also includes a cylinder seat (21), a cylinder mounting plate (23), a bottom plate (24), a top plate (26), a third bearing (214), and a limiting device (212). The base plate (24) and top plate (26) are respectively fixed to the upper and lower ends of the first bearing seat (25); a cylinder mounting plate (23) is fixed on the base plate (24); the cylinder (22) is mounted on the mounting plate (211) through the cylinder seat (21), and the piston end of the cylinder (22) is fixedly connected to the cylinder mounting plate (23); the limiting device (212) is set on the base plate (24) and between the base plate (24) and the top plate (26); The air knife shaft (27) is mounted on the first bearing seat (25) via the third bearing (214); The bottom of the adjusting support plate (313) is provided with a limiting plate (34).

4. The online air knife adjustment device for a corrosive environment in a diaphragm production line according to claim 1, characterized in that, The rotating device (3) also includes a second bearing housing (37), a second bearing (38), and a motor flange (311). The second bearing seat (37) is fixed on the adjusting support plate (313), the adjusting worm (36) is mounted on the second bearing seat (37) through the second bearing (38), and the drive motor (312) is mounted outside the extraction tank through the motor flange (311).

5. The online air knife adjustment device for a corrosive environment in a diaphragm production line according to claim 1, characterized in that, The air knife (1) also includes a hose (12), a crossbeam (13), an air knife side mounting plate (14), and an air knife pipeline (15). The two ends of the drying air knife (11) are fixedly connected to the crossbeam (13). The drying air knife (11) is fixed with the air knife side mounting plate (14) on both sides. One end of the hose (12) is connected to the air knife pipeline (15), and the other end of the hose (12) passes through the air knife side mounting plate (14) and is connected to the drying air knife (11). The air knife pipe (15) is provided with multiple air outlets, and each air outlet is provided with an air valve.

6. The online air knife adjustment device for a corrosive environment in a diaphragm production line according to claim 1, characterized in that, The drying air knife (11) is a side-inlet air-drying ...

7. The online air knife adjustment device for a corrosive environment in a diaphragm production line according to claim 5, characterized in that, It also includes a control system, which is electrically connected to the drive motor (312), the cylinder (22), and the air valves at each air outlet. The control system is used to preset drying process parameters, automatically control the extension and retraction stroke of the cylinder (22) online, control the rotation angle, speed and start / stop of the drive motor (312), and independently adjust the opening of each air valve.

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