A coating thickness detection device

Abstract

The present invention discloses a coating thickness detection device, which includes two symmetrically arranged side plates and a bottom plate fixed between the two side plates. A unwinding roller, a winding roller, a transition roller and a top shaft are rotatably connected between the two side plates. The unwinding roller and the winding roller are respectively arranged on both sides of the top of the bottom plate. The top shaft is arranged at the middle position of the top of the bottom plate located between the side plates, and the transition roller is arranged on both sides of the top shaft. When the thickness gauge loosens due to the vibration of the equipment operation, it rotates within the range of area Q and will not affect its measurement structure. However, the traditional measurement structure uses a thickness gauge to test a diaphragm with a horizontal end. When this section of the diaphragm has a slight inclination, the distance that the infrared ray passes through the diaphragm increases, resulting in the influence on the measurement result. And this structure uses a thickness gauge to measure the thickness of a diaphragm with an arc-shaped end, which can avoid the problem of inaccurate measurement structure caused by the change of the motion state of the diaphragm during the conveying process.

Description

Technical Field

[0001] The present invention relates to the technical field of coating thickness detection, and particularly relates to a coating thickness detection device. Background Art

[0002] A battery separator refers to a separator material between the positive and negative electrodes of a battery. It is a very crucial part of the battery and has a direct impact on the safety and cost of the battery. Its main functions are: isolating the positive and negative electrodes and preventing electrons in the battery from freely passing through, while allowing ions in the electrolyte to freely pass between the positive and negative electrodes. The ion conduction ability of the battery separator is directly related to the overall performance of the battery. Its function of isolating the positive and negative electrodes enables the battery to limit the increase in current in the case of overcharging or rising temperature, preventing the battery from short-circuiting and exploding, and has a microporous self-closing protection effect, playing a safety protection role for battery users and equipment.

[0003] Chinese invention patent CN106370114A discloses a diaphragm coating device with an on-line thickness measurement function, including a coating mechanism, a thickness detection mechanism, and a control panel. The coating mechanism includes a coating roller for coating the coating on the diaphragm and a motor for driving the coating roller to rotate. The thickness detection mechanism includes a bench, a detection guide roller, and an infrared detector. The detection guide roller includes a first detection guide roller and a second detection guide roller spaced on the bench. The infrared detector is arranged above the first detection guide roller and the second detection guide roller. The control panel is respectively in communication connection with the infrared detector and the motor, and controls the rotation of the motor according to the thickness information measured by the infrared detector. The present invention realizes the control of the coating thickness during the diaphragm coating process, achieves the purpose of on-line improving the surface flatness of the diaphragm, improves the qualified rate of products, reduces the rejection rate of products, reduces the production cost of enterprises, and improves the production efficiency of enterprises.

[0004] However, when the rotation speeds of the unwinding roller and the winding roller do not match, the diaphragm between the first detection roller and the second detection roller will be tightened or loosened. When the diaphragm is tightened, its thickness will change slightly, and when the diaphragm between the first detection roller and the second detection roller is relatively loose, it will bend downward. At this time, the rays emitted by the thickness detection mechanism are not perpendicular to the diaphragm, resulting in deviation of the measurement results.

[0005] Therefore, it is necessary to provide a coating thickness detection device to solve the above technical problems. Summary of the Invention

[0006] The object of the present invention is to provide a coating thickness detection device to solve the problem proposed in the above-mentioned background technology that when the rotation speeds of the unwinding roller and the winding roller do not match, the diaphragm between the first detection roller and the second detection roller will be tightened or loosened. When the diaphragm is tightened, its thickness will change slightly, and when the diaphragm between the first detection roller and the second detection roller is relatively loose, it will bend downward. At this time, the ray emitted by the thickness detection mechanism is not perpendicular to the diaphragm, resulting in deviation of the measurement result.

[0007] Based on the above idea, the present invention provides the following technical solutions: It includes two symmetrically arranged side plates and a bottom plate fixed between the two side plates. An unwinding roller, a winding roller, a transition roller and a top shaft are rotatably connected between the two side plates. The unwinding roller and the winding roller are respectively arranged on both sides of the top of the bottom plate. The top shaft is arranged in the middle of the top of the bottom plate between the side plates. The transition roller is arranged on both sides of the top shaft. A thickness gauge is arranged on the top of the top shaft. A support rod is fixedly connected to the outside of the thickness gauge. One end of the support rod away from the thickness gauge is fixedly connected to a bracket.

[0008] Both the front and rear ends of the top shaft are fixedly connected with connecting shafts. One end of the connecting shaft away from the top shaft is rotatably connected with a fixed shaft. The fixed shaft passes through the bracket and is in interference fit with the bracket. When the diaphragm bypasses the outside of the top shaft, the diaphragm is in partial contact with the top shaft in area Q. The infrared ray emitted by the thickness gauge on the side where the diaphragm contacts the top shaft passes through the axis of the top shaft.

[0009] As a further scheme of the present invention: A fixed ring is fixedly connected to the outside of the fixed shaft. A top rod is fixedly connected to the outside of the fixed ring. A sleeve is fixedly connected to the outside of the side plate. The inside of the sleeve is filled with oil. A sealing plate is slidably connected to the inside of the sleeve. The sealing plate is in sealing fit with the sleeve. The bottom end of the top rod is fixedly connected to the sealing plate.

[0010] As a further scheme of the present invention: An oil storage pipe is arranged on one side of the side plate. A pressing plate is slidably connected to the inside of the oil storage pipe. The pressing plate is in sealing connection with the oil storage pipe. The inside of the oil storage pipe on the side of the pressing plate is filled with oil. The oil storage pipe is communicated with the sleeve. When the rotation speed of the winding roller is greater than that of the unwinding roller, the oil in the sleeve flows back to the inside of the oil storage pipe. When the rotation speed of the unwinding roller is greater than that of the winding roller, the oil in the oil storage pipe is squeezed into the sleeve.

[0011] As a further scheme of the present invention: A connecting pipe is communicated with the bottom of the sleeve. The connecting pipes on both sides are connected to each other through a tee. One end of the tee away from the connecting pipe is communicated with a liquid guide pipe. The end of the liquid guide pipe away from the tee is communicated with the oil storage pipe.

[0012] As a further solution of the present invention: both ends of the unwinding roller are fixedly connected with unwinding shafts, both ends of the winding roller are fixedly connected with winding shafts, one ends of the unwinding shaft and the winding shaft are respectively fixedly connected with a first bevel gear and a second bevel gear, a first horizontal shaft and a second horizontal shaft are arranged outside the side plate, one end of the first horizontal shaft close to the first bevel gear is fixedly connected with a third bevel gear meshing with it, one end of the second horizontal shaft close to the second bevel gear is fixedly connected with a fourth bevel gear meshing with it, and the third bevel gear and the fourth bevel gear are respectively arranged on the same side of the first bevel gear and the second bevel gear.

[0013] As a further solution of the present invention: one end of the second horizontal shaft far from the fourth bevel gear is fixedly connected with a turntable, a toothed ring is fixedly connected to the inner peripheral wall of the turntable cavity, one end of the first horizontal shaft far from the third bevel gear is fixedly connected with a fixing plate, a rotating shaft is arranged on one side of the fixing plate close to the turntable, the rotating shaft is rotationally connected with the fixing plate, and a spur gear meshing with the toothed ring is fixedly connected to one end of the rotating shaft far from the fixing plate.

[0014] As a further solution of the present invention: a limiting cylinder is arranged on one side of the fixing plate close to the turntable, the limiting cylinder is in transmission connection with the rotating shaft, the limiting cylinder is coaxially arranged with the first horizontal shaft, a collar is sleeved outside the limiting cylinder, the limiting cylinder is rotationally connected with the collar, the collar and the fixing plate are fixedly connected by a fastening rod, a driving shaft is coaxially arranged inside the first horizontal shaft, one end of the driving shaft extends into the limiting cylinder, a sliding groove is opened on the outer side of a section of the driving shaft close to the limiting cylinder, and a sliding block matched with the sliding groove is fixedly connected to the inner wall of the limiting cylinder. The driving shaft is in threaded connection with the first horizontal shaft, and one end of the driving shaft far from the limiting cylinder extends into the oil storage pipe and is rotationally connected with a pressing plate.

[0015] As a further solution of the present invention: belt wheels are fixedly connected to the outer sides of the limiting cylinder and the rotating shaft, and a belt is sleeved outside the belt wheels, so that the rotating shaft is in transmission connection with the limiting cylinder through the belt.

[0016] As a further solution of the present invention: the inside of the first horizontal shaft is set as a through hole, internal threads are arranged on the inner wall of the through hole, and external threads meshing with the internal threads are arranged on the outer side of the driving shaft.

[0017] Compared with the prior art, when the thickness gauge rotates within the area Q, the infrared rays emitted by the thickness gauge always face the area Q

[0018] It is perpendicular to the diaphragm inside, so the thickness of the infrared ray passing through the diaphragm will not be affected, thereby improving the accuracy of the test and the error tolerance of the test result. During actual use, when the thickness gauge becomes loose due to the vibration of the equipment operation, it rotates within the range of area Q and will not affect its measurement structure. However, the traditional measurement structure uses a thickness gauge to test a diaphragm with a horizontal end. When this section of the diaphragm has a slight inclination, the distance that the infrared ray passes through the diaphragm increases, resulting in the measurement result being affected. This structure uses a thickness gauge to measure the thickness of a diaphragm with an arc-shaped end, which can avoid the problem of inaccurate measurement structure caused by the change of the motion state of the diaphragm during transportation, and has a wider scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the drawings and embodiments.

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the connection pipe and the diversion pipe structure of the present invention;

[0022] Figure 3 is a schematic diagram of the bracket connection structure of the present invention;

[0023] Figure 4 is a schematic diagram of the connection structure between the turntable and the spur gear of the present invention;

[0024] Figure 5 is a top view of the present invention;

[0025] Figure 6 is a front view of the present invention;

[0026] Figure 7 is the present invention Figure 1 enlarged view of the structure of part A;

[0027] Figure 8 is the present invention Figure 6 enlarged view of the structure of part C;

[0028] Figure 9 is the present invention Figure 3 enlarged view of the structure of part B;

[0029] Figure 10 is a schematic diagram of the chute and slider structure of the present invention;

[0030] Figure 11 is a schematic diagram of the fixed shaft and connecting shaft structure of the present invention;

[0031] Figure 12 is a usage scenario diagram of the thickness gauge of the present invention.

[0032] In the figure: 1, side plate; 2, fixed shaft; 3, fixed ring; 4, thickness gauge; 5, support rod; 6, bracket; 7, diaphragm; 8, unwinding roller; 9, liquid guide pipe; 10, oil storage pipe; 11, rewinding shaft; 12, first bevel gear; 13, first horizontal shaft; 14, second horizontal shaft; 15, second bevel gear; 16, winding shaft; 17, winding roller; 18, transition roller; 19, top shaft; 20, sleeve; 21, connecting pipe; 22, turntable; 23, tee; 24, drive shaft; 25, pressing plate; 26, ejector rod; 27, fixing plate; 28, gear ring; 29, spur gear; 30, rotating shaft; 31, fastening rod; 32, belt; 33, limiting cylinder; 34, slider; 35, sliding groove; 36, sealing plate; 37, connecting shaft. Detailed implementation manner

[0033] As Figures 1-3 shown, a coating thickness detection device includes two symmetrically arranged side plates 1 and a bottom plate fixed between the two side plates 1. An unwinding roller 8, a winding roller 17, a transition roller 18 and a top shaft 19 are rotatably connected between the two side plates 1. The unwinding roller 8 and the winding roller 17 are respectively arranged on both sides of the top of the bottom plate, and the top shaft 19 is arranged in the middle of the top of the bottom plate at the position of the side plate 1. The transition roller 18 is arranged on both sides of the top shaft 19. A thickness gauge 4 is arranged on the top of the top shaft 19. Specifically, the thickness gauge 4 can adopt an infrared thickness gauge 4 to detect the uniformity of the thickness of the diaphragm 7 after coating.

[0034] In the actual use process, metals such as aluminum or copper are evaporated at high temperature to adhere to the surface of the diaphragm 7, and the thickness gauge 4 on the top of the top shaft 19 can monitor the thickness of the coated diaphragm 7 in real time, thereby improving the coating quality of the diaphragm 7.

[0035] As Figure 3 、 12 shown, a support rod 5 is fixedly connected to the outside of the thickness gauge 4. One end of the support rod 5 far from the thickness gauge 4 is fixedly connected to a bracket 6. Both the front and rear ends of the top shaft 19 are fixedly connected to a connecting shaft 37. One end of the connecting shaft 37 far from the top shaft 19 is rotatably connected to a fixed shaft 2, and the fixed shaft 2 penetrates through the bracket 6 and is in interference fit with the bracket 6. Specifically, the bracket 6 is arranged between the side plate 1 and the top shaft 19, and the thickness gauge 4 is arranged on the top of the top shaft 19, so that the infrared rays emitted by the thickness gauge 4 always pass through the axis of the top shaft 19.

[0036] During specific use, the thickness of the coating can be detected by the thickness gauge 4. The thickness gauge 4 is arranged on the top of the top shaft 19, and the fixed shaft 2 penetrates through the bracket 6, so that the thickness gauge 4 rotates around the axis of the fixed shaft 2. The infrared rays emitted by the thickness gauge 4 always pass through the axis of the top shaft 19 during the rotation process. As Figure 12As shown, when the diaphragm 7 bypasses from the outside of the top shaft 19, the diaphragm 7 is in partial contact with the top shaft 19 in the area Q. When the thickness gauge 4 rotates in the area Q, the infrared rays emitted by the thickness gauge 4 are always perpendicular to the diaphragm 7 in the area Q. Therefore, the thickness of the infrared rays passing through the diaphragm 7 will not be affected, thereby improving the test accuracy and the error tolerance of the test results. During actual use, when the thickness gauge 4 becomes loose due to the vibration of the equipment operation and rotates within the area Q, it will not affect its measurement structure. However, in the traditional measurement structure, the thickness gauge 4 is used to test the diaphragm 7 with one end horizontal. When this section of the diaphragm 7 has a slight inclination, the distance that the infrared rays pass through the diaphragm 7 increases, resulting in the measurement result being affected. This structure uses the thickness gauge 4 to measure the thickness of the diaphragm 7 with one end arc-shaped, which can avoid the problem of inaccurate measurement structure caused by the change of the motion state of the diaphragm 7 during transportation, and has a wider application range.

[0037] As Figures 2-11 shown, a through groove is provided on the side plate 1, and one ends of the connecting shaft 37 and the fixed shaft 2 connected to each other are both placed at this through groove. A fixing ring 3 is fixedly connected to the outside of the fixed shaft 2, a top rod 26 is fixedly connected to the outside of the fixing ring 3, and the top rod 26 is arranged vertically. At the same time, a sleeve 20 is fixedly connected to the outside of the side plate 1, the inside of the sleeve 20 is filled with a hydraulic fluid, a sealing plate 36 is slidably connected to the inside of the sleeve 20, the sealing plate 36 is hermetically connected to the sleeve 20, and the bottom end of the top rod 26 is fixedly connected to the sealing plate 36.

[0038] Furthermore, a connecting pipe 21 is communicated and arranged at the bottom of the sleeve 20, the two connecting pipes 21 on both sides are connected to each other through a tee 23, and a liquid guide pipe 9 is communicated and arranged at one end of the tee 23 away from the connecting pipe 21.

[0039] Both ends of the unwinding roller 8 are fixedly connected with unwinding shafts 11. The unwinding shafts 11 pass through the side plate 1 and are rotatably connected with the side plate 1. Both ends of the winding roller 17 are fixedly connected with winding shafts 16. The winding shafts 16 pass through the side plate 1 and are rotatably connected with the side plate 1. Specifically, one end of the winding shaft 16 is connected with a servo motor. The winding roller 17 can be driven to rotate by the servo motor, so as to wind the diaphragm 7 after spraying. The other ends of the unwinding shaft 11 and the winding shaft 16 are respectively fixedly connected with a first bevel gear 12 and a second bevel gear 15. Specifically, a first horizontal shaft 13 and a second horizontal shaft 14 are arranged outside the side plate 1. A boss is fixedly connected to the side plate 1, so that the first horizontal shaft 13 and the second horizontal shaft 14 both penetrate through the boss and are rotatably connected therewith to support the first horizontal shaft 13 and the second horizontal shaft 14. One end of the first horizontal shaft 13 close to the first bevel gear 12 is fixedly connected with a third bevel gear meshing with it. One end of the second horizontal shaft 14 close to the second bevel gear 15 is fixedly connected with a fourth bevel gear meshing with it. The third bevel gear and the fourth bevel gear are respectively arranged on the same side of the first bevel gear 12 and the second bevel gear 15, so that when the unwinding shaft 11 and the winding shaft 16 rotate, they can drive the first horizontal shaft 13 and the second horizontal shaft 14 to rotate in the same direction.

[0040] A turntable 22 is fixedly connected to the end of the second horizontal shaft 14 far from the fourth bevel gear. A toothed ring 28 is fixedly connected to the inner peripheral wall of the cavity of the turntable 22. A fixing plate 27 is fixedly connected to the end of the first horizontal shaft 13 far from the third bevel gear. A rotating shaft 30 is arranged on the side of the fixing plate 27 close to the turntable 22. The rotating shaft 30 is rotatably connected with the fixing plate 27. The end of the rotating shaft 30 far from the fixing plate 27 is fixedly connected with a spur gear 29 meshing with the toothed ring 28. At the same time, a limiting cylinder 33 is also arranged on the side of the fixing plate 27 close to the turntable 22. The limiting cylinder 33 is coaxially arranged with the first horizontal shaft 13. Specifically, a collar is sleeved outside the limiting cylinder 33. The limiting cylinder 33 is rotatably connected with the collar. The collar and the fixing plate 27 are fixedly connected by a fastening rod 31.

[0041] Pulley wheels are fixedly connected to the outer sides of both the limiting cylinder 33 and the rotating shaft 30. A belt 32 is sleeved outside the pulley wheels, so that the rotation of the rotating shaft 30 can drive the limiting cylinder 33 to rotate. A driving shaft 24 is coaxially arranged inside the first horizontal shaft 13. One end of the driving shaft 24 extends into the limiting cylinder 33. Specifically, a sliding groove 35 is formed on the outer side of a section of the driving shaft 24 close to the limiting cylinder 33. A sliding block 34 matching with the sliding groove 35 is fixedly connected to the inner wall of the limiting cylinder 33, so that the rotation of the limiting cylinder 33 can drive the driving shaft 24 to rotate. The driving shaft 24 is in threaded connection with the first horizontal shaft 13. When the driving shaft 24 rotates, it can make a linear motion through its meshing with the first horizontal shaft 13.

[0042] Further, an oil storage pipe 10 is provided at one end of the drive shaft 24 away from the limit cylinder 33. The oil storage pipe 10 is fixed to the side plate 1 through a fixing rod, and the drive shaft 24 passes through the oil storage pipe 10 and extends into its interior. One end of the drive shaft 24 extending into the interior of the oil storage pipe 10 is rotatably connected to a pressing plate 25. The pressing plate 25 is sealingly connected to the oil storage pipe 10, and a liquid is filled on one side of the pressing plate 25 in the inner cavity of the oil storage pipe 10. One end of the liquid guide pipe 9 away from the three-way joint 23 is communicated with one end of the oil storage pipe 10 away from the drive shaft 24.

[0043] During specific use, the servo motor can drive the winding roller 17 to rotate, so as to wind the sprayed diaphragm 7. When the rotation speeds of the unwinding roller 8 and the winding roller 17 do not match, the diaphragm 7 will be tightened or loosened. At this time, under the elastic force, the thickness of the diaphragm 7 will change slightly, resulting in errors in the measurement process of the thickness gauge 4. The traditional structure uses components such as springs to adjust the positions of the corresponding roller shafts to adapt to the loosened or tightened diaphragm 7. However, during this process, the spring is always in a compressed or stretched state, resulting in a passive adjustment process for the diaphragm 7. The diaphragm 7 is subjected to a large force during this process, which is likely to cause deformation of the diaphragm 7. On the one hand, it may lead to errors in the measurement of the thickness gauge 4, and on the other hand, it also reduces the production quality of the diaphragm 7.

[0044] During the use of this device, in the initial state, since the diameter of the winding roller 17 is smaller and the diameter of the diaphragm 7 wound around the outside of the unwinding roller 8 is larger, the rotational speed of the winding roller 17 is greater than that of the unwinding roller 8. Therefore, the rotational speed of the winding shaft 16 is greater than that of the unwinding shaft 11. The winding shaft 16 can drive the second horizontal shaft 14 to rotate through the meshing of the second bevel gear 15 and the fourth bevel gear, and then drive the turntable 22 to rotate. Similarly, the unwinding shaft 11 can drive the first horizontal shaft 13 to rotate through the meshing of the first bevel gear 12 and the third bevel gear, and then drive the fixed plate 27 and the spur gear 29 on one side of it to rotate. Since the first one is very bad is coaxially arranged with the turntable 22, when the rotational speeds of the turntable 22 and the spur gear 29 during circular motion are different, the toothed ring 28 meshes with the spur gear 29, thereby driving the rotating shaft 30 to rotate. The rotating shaft 30 can drive the limiting cylinder 33 to rotate through the belt 32. The limiting cylinder 33 can drive the driving shaft 24 to rotate through the cooperation of the sliding groove 35 and the slider 34. The driving shaft 24 is threadedly connected to the first horizontal shaft 13. Therefore, when the driving shaft 24 rotates, it can move linearly along the axis of the first horizontal shaft 13, and then drive the pressing plate 25 to move linearly inside the oil storage pipe 10. Here, in the initial state, the rotational speed of the winding roller 17 is greater than that of the unwinding roller 8. Therefore, the rotational speed of the turntable 22 is greater than the rotational speed of the circular motion of the spur gear 29, causing the toothed ring 28 to mesh with the spur gear 29, driving the limiting cylinder 33 to rotate through the belt 32, and then driving the driving shaft 24 to rotate. During the rotation of the driving shaft 24, it can drive the pressing plate 25 to move towards the turntable 22, thereby reducing the pressure inside the oil storage pipe 10. The oil in the connecting pipe 21, the diversion pipe and the sleeve 20 flows back into the oil storage pipe 10, and then the height of the sealing plate 36 is reduced, prompting the height of the fixed shaft 2 and the top shaft 19 to be reduced, which is beneficial to reducing the supporting force of the top shaft 19 on the diaphragm 7 in the initial state, thereby protecting the diaphragm 7 and preventing it from deforming greatly. After the winding roller 17 winds the diaphragm 7 for a period of time, its outer diameter is larger than the outer diameter of the diaphragm 7 wound around the outside of the unwinding roller 8. At this time, the rotational speed of the unwinding roller 8 gradually increases and exceeds the rotational speed of the winding roller 17. Then, the rotational speed of the first horizontal shaft 13 is greater than that of the second horizontal shaft 14, causing the spur gear 29 on one side of the fixed plate 27 to rotate relative to the toothed ring 28, so that the spur gear 29 rotates in the opposite direction, which can drive the rotating shaft 30 to reverse, and then drive the driving shaft 24 to reverse through the belt 32. At this time, the driving shaft 24 can drive the pressing plate 25 to move away from the turntable 22 inside the oil storage pipe 10, and the oil inside it can be squeezed into the sleeve 20 through the connecting pipe 21 and the liquid guide pipe 9, thereby prompting the sealing plate 36 inside the sleeve 20 to move upward, which can drive the top shaft 19 to move upward. At this time, the upward movement of the top shaft 19 can increase the acting force between it and the diaphragm 7, which is beneficial to preventing the diaphragm 7 from loosening due to the fast rotational speed of the unwinding roller 8;

[0045] And by utilizing this structure, when the rotational speed of the winding roller 17 fluctuates during operation, the rotational speeds of the second horizontal shaft 14 and the turntable 22 will also fluctuate accordingly, thereby causing the rotational speed difference between the turntable 22 and the spur gear 29 to fluctuate, thereby prompting the movement of the drive shaft 24. The oil pressure inside the oil storage pipe 10 can be adjusted through the drive shaft 24, which is beneficial to adjusting the oil pressure inside the sleeve 20. The height of the top shaft 19 can be adjusted in real time to adapt to the fluctuation of the rotational speed of the winding shaft 16 and avoid fluctuations of the diaphragm 7 during the winding process.

[0046] To sum up, the structure can be used to adjust the height of the top shaft 19 in real time during the rotation of the winding shaft 16 and the unwinding shaft 11, and the height of the top shaft 19 is adjusted in real time according to the tightness of the diaphragm 7 when it is wound, which is an active adjustment. It can avoid the top shaft 19 from exerting a large force on the diaphragm 7, thereby protecting the diaphragm 7. In the process of adjustment using this structure, the diaphragm 7 is subjected to uniform force, so no large deformation will occur during the adjustment process. The thickness gauge 4 on the top of the top shaft 19 can improve the measurement accuracy, and will not cause inaccurate measurement due to excessive deformation of the diaphragm 7, and it is more practical.

Claims

1. A coating thickness detection device, comprising two symmetrically arranged side plates and a bottom plate fixed between the two side plates. A unwind roller, a wind-up roller, a transition roller and a top shaft are rotatably connected between the two side plates. The unwind roller and the wind-up roller are respectively arranged on both sides of the top of the bottom plate. The top shaft is arranged at the middle position of the top of the bottom plate and located between the side plates. The transition roller is arranged on both sides of the top shaft. A thickness gauge is arranged at the top of the top shaft, and it is characterized in that: A support rod is fixedly connected to the outer side of the thickness gauge, and a support is fixedly connected to the end of the support rod away from the thickness gauge; Connecting shafts are fixedly connected to both the front and rear ends of the top shaft. The end of the connecting shaft away from the top shaft is rotatably connected to a fixed shaft. The fixed shaft passes through the support and is in interference fit with the support. When the diaphragm bypasses the outer side of the top shaft, the diaphragm is in partial contact with the top shaft. The infrared rays emitted by the thickness gauge on the side where the diaphragm contacts the top shaft pass through the axis of the top shaft; A fixed ring is fixedly connected to the outer side of the fixed shaft, and a top rod is fixedly connected to the outer side of the fixed ring. A sleeve is fixedly connected to the outer side of the side plate. The sleeve is filled with hydraulic oil. A sealing plate is slidably connected inside the sleeve. The sealing plate is sealingly connected to the sleeve. The bottom end of the top rod is fixedly connected to the sealing plate; An oil storage pipe is arranged on one side of the side plate. A pressing plate is slidably connected inside the oil storage pipe. The pressing plate is sealingly fitted with the oil storage pipe. The inner cavity of the oil storage pipe is filled with hydraulic oil on the side of the pressing plate. The oil storage pipe is communicated with the sleeve. When the rotation speed of the winding roller is greater than that of the unwinding roller, the hydraulic oil inside the sleeve flows back to the inside of the oil storage pipe. When the rotation speed of the unwinding roller is greater than that of the winding roller, the hydraulic oil inside the oil storage pipe is squeezed into the sleeve; A connecting pipe is communicated with the bottom of the sleeve. The connecting pipes on both sides are connected to each other through a tee joint. The end of the tee joint away from the connecting pipe is communicated with a liquid guide pipe. The end of the liquid guide pipe away from the tee joint is communicated with the oil storage pipe.

2. The coating thickness detection device according to claim 1, wherein: Unwinding shafts are fixedly connected to both ends of the unwinding roller, and winding shafts are fixedly connected to both ends of the winding roller. A first bevel gear and a second bevel gear are respectively fixedly connected to one ends of the unwinding shaft and the winding shaft. A first horizontal shaft and a second horizontal shaft are arranged on the outer side of the side plate. A third bevel gear meshing with it is fixedly connected to the end of the first horizontal shaft close to the first bevel gear. A fourth bevel gear meshing with it is fixedly connected to the end of the second horizontal shaft close to the second bevel gear. The third bevel gear and the fourth bevel gear are respectively arranged on the same side of the first bevel gear and the second bevel gear.

3. The coating thickness detection device according to claim 2, wherein: A turntable is fixedly connected to the end of the second horizontal shaft away from the fourth bevel gear. A toothed ring is fixedly connected to the circumferential wall of the inner cavity of the turntable. A fixing plate is fixedly connected to the end of the first horizontal shaft away from the third bevel gear. A rotating shaft is arranged on the side of the fixing plate close to the turntable. The rotating shaft is rotatably connected to the fixing plate. A spur gear meshing with the toothed ring is fixedly connected to the end of the rotating shaft away from the fixing plate.

4. The coating thickness detection device according to claim 3, characterized in that: A limiting cylinder is arranged on the side of the fixing plate close to the turntable. The limiting cylinder is in transmission connection with the rotating shaft. The limiting cylinder is coaxially arranged with the first horizontal shaft. A collar is sleeved on the outer side of the limiting cylinder. The limiting cylinder is rotatably connected to the collar. The collar and the fixing plate are fixed by a fastening rod. A driving shaft is coaxially arranged inside the first horizontal shaft. One end of the driving shaft extends into the limiting cylinder. A chute is arranged on the outer side of a section of the driving shaft close to the limiting cylinder. A slider matching with the chute is fixedly connected to the inner wall of the limiting cylinder. The driving shaft is threadedly connected to the first horizontal shaft. The end of the driving shaft away from the limiting cylinder extends into the oil storage pipe and is rotatably connected to the pressing plate.

5. The coating thickness detection device according to claim 4, characterized in that: Both the outer sides of the limiting cylinder and the rotating shaft are fixedly connected with belt pulleys, and a belt is sleeved outside the belt pulleys, so that the rotating shaft and the limiting cylinder are in transmission connection through the belt.

6. The coating thickness detection device according to claim 4, wherein: The inside of the first horizontal shaft is arranged as a through hole, internal threads are arranged on the inner wall of the through hole, and external threads meshing with the internal threads are arranged outside the driving shaft.

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