Slitting machine cutter shaft thermal extension online monitoring and thermal compensation device

Abstract

The slitting machine cutter shaft thermal extension online monitoring and thermal compensation device comprises a bottom plate, a supporting frame is fixedly installed at the top of the bottom plate, and a supporting frame is fixedly installed at the top of the supporting frame; and the first cutter shaft is arranged at the top of the supporting frame, and a second cutter shaft is arranged at the top of the first cutter shaft. According to the slitting machine cutter shaft thermal extension on-line monitoring and thermal compensation device, when the temperature detection assembly is used, the temperature of the first cutter shaft and the temperature of the second cutter shaft are detected in real time, when the temperature difference of the two cutter shafts is about to break through a critical value, a system can automatically conduct judgment, and the temperature difference of the two cutter shafts is about to break through the critical value; the upper cutter shaft or the lower cutter shaft is automatically subjected to thermal compensation operation, air is blown into the first air collecting frame and the second air collecting frame through the air blower, the upper cutter shaft and the lower cutter shaft are cooled, and therefore the shaft temperature of the upper cutter shaft and the shaft temperature of the lower cutter shaft are kept stable, blade gaps are prevented from being changed, the steel coil shearing quality is improved, and the service life of the blades is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of steel plate coil processing, and in particular to an online monitoring and thermal compensation device for thermal extension of a knife shaft of a slitting machine. Background Art

[0002] The slitting machine is an important machine in metal sheet processing equipment. The main function of the slitting machine is to cut wide metal coils, such as steel strips, aluminum strips, etc., longitudinally according to the set width to make them into narrow strips of coils or plates. It usually consists of an uncoiling part, a feeding part, a shearing part, a coiling part, etc.

[0003] When the slitting machine is working, since the disc shear shaft of the slitting machine unit is made of steel, when the temperature rises, the steel will extend, and the temperature rise expansion will cause the knife gap to change, thus affecting the shearing quality. The inconsistent blade gap caused by the thermal expansion of the knife shaft will affect the stress distribution of the blade during the shearing process, and then lead to quality problems such as burrs and sickle bends. In addition, too large or too small blade gap will have a negative impact on the shearing quality. Too large a gap will cause large burrs and poor straightness on the sheared workpiece; too small a gap will cause the upper and lower blade edges to bite, which will affect the sharpness of the blade edge at the least, and cause the blade edge to crack at the worst.

[0004] Therefore, it is necessary to provide an online monitoring and thermal compensation device for thermal extension of the blade shaft of a longitudinal shearing machine to solve the above technical problems. Summary of the invention

[0005] The invention provides an online monitoring and thermal compensation device for thermal extension of a slitting machine blade shaft, which solves the problem that the temperature increase of a shearing machine disc scissors shaft easily causes a change in the blade gap, thereby affecting the cutting quality and reducing the service life of the blade.

[0006] In order to solve the above technical problems, the present invention provides an online monitoring and thermal compensation device for thermal extension of a slitting machine blade shaft, comprising:

[0007] A bottom plate, a support frame is fixedly installed on the top of the bottom plate, and a support frame is fixedly installed on the top of the support frame;

[0008] A first knife shaft, wherein the first knife shaft is arranged at the top of the support frame, a second knife shaft is arranged at the top of the first knife shaft, one end of the first knife shaft is rotatably connected to the other side of the inner side of the support frame, and a first drive motor is fixedly installed at the other end of the first knife shaft, and the first drive motor is fixedly installed at one side of the support frame;

[0009] A control cabinet, the control cabinet is fixedly installed on the top of the base plate;

[0010] Two temperature detection components, both of which are arranged on the top of the control cabinet, and both of which include a rotating seat, a magnetic plate, a mounting plate, a display screen and an infrared temperature detector, wherein the magnetic plate is magnetically attracted to the top of the control cabinet, the rotating seat is fixedly mounted on the top of the magnetic plate, the mounting plate is rotatably connected to the inner side of the rotating seat, the display screen is fixedly mounted on the front side of the mounting plate, and the two infrared temperature detectors are respectively arranged on the front sides of the first blade shaft and the second blade shaft;

[0011] A hair dryer, the hair dryer is fixedly installed on the top of the base plate, and two air pipes are fixedly installed on the output end of the hair dryer, a first air collecting frame is fixedly installed on the output end of one of the air pipes, and the first air collecting frame is fixedly installed inside the top of the support frame, and a second air collecting frame is fixedly installed on the output end of the other air pipe, and the second air collecting frame is fixedly installed inside the top of the support frame, and air outlet windows are fixedly installed on the bottom of the first air collecting frame and the top of the second air collecting frame.

[0012] Preferably, both sides of the support frame are provided with sliding grooves, the inner side of the sliding groove is fixedly mounted with a sliding rod, the outer side of the sliding rod is slidably connected to a moving seat, a second driving motor is fixedly mounted on one side of the moving seat, the output end of the second driving motor is fixedly mounted on one end of the second knife shaft, and one end of the second knife shaft is rotatably connected to one side of the moving seat on the other side.

[0013] Preferably, telescopic cylinders are fixedly mounted on both ends of the top of the support frame, and the output ends of the telescopic cylinders are fixedly mounted on the top of the moving seat.

[0014] Preferably, two fixing components are provided on the front side of the support frame, and both of the two fixing components include a fixing plate, a mounting screw, a universal adjustment rod, a mounting seat, a fixing ring and a locking screw, the mounting screw is arranged inside the fixing plate, the universal adjustment rod is fixedly installed on the front side of the fixing plate, the mounting seat is fixedly installed on one end of the universal adjustment rod, the fixing ring is fixedly installed inside the mounting seat, and the locking screw is threadedly connected to the inside of one end of one side of the fixing ring.

[0015] Preferably, one end of the mounting screw is threadedly connected to the front side of the support frame, the infrared temperature detector is arranged on the inner side of the fixing ring, and one end of the locking screw is arranged on one side of the infrared temperature detector.

[0016] Preferably, an air inlet cover is fixedly mounted on the input end of the hair dryer, a filter is fixedly mounted on the inner side of the air inlet cover, and a rotating shaft is rotatably connected to the inside of the filter.

[0017] Preferably, a rotating plate is fixedly mounted on one end of the rotating shaft, cleaning brushes are fixedly mounted on both ends of the back side of the rotating plate, and the cleaning brushes are attached to the front side of the filter.

[0018] Preferably, a discharge port is provided on the front side of the second air collecting hood, and a sealing plate is provided on the front side of the discharge port.

[0019] Preferably, positioning screws are provided inside the top and bottom of both ends of the front side of the sealing plate, and one end of the positioning screw is threadedly connected to the front side of the second air collecting frame.

[0020] Preferably, a material guide plate is fixedly mounted on the inner side surface of the second air collecting frame, and a handle is fixedly mounted on the front surface of the sealing plate.

[0021] Compared with the related art, the device for online monitoring and thermal compensation of thermal extension of the cutter shaft of a slitting machine provided by the present invention has the following beneficial effects:

[0022] The present invention provides an online monitoring and thermal compensation device for thermal extension of the blade shaft of a longitudinal shearing machine. When the temperature difference between the two blade shafts is about to exceed a critical value, the system will automatically determine and automatically perform thermal compensation operation on the upper or lower blade shaft. A hair dryer is used to blow air into the interior of a first air collecting frame and a second air collecting frame respectively to cool the upper and lower blade shafts, thereby maintaining the stability of the shaft temperature of the upper and lower blade shafts, thereby avoiding changes in the blade gap, improving the quality of steel coil shearing, and increasing the service life of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a first embodiment of an online monitoring and thermal compensation device for thermal extension of a slitting machine blade shaft provided by the present invention;

[0024] Figure 2 for Figure 1 Another perspective structural schematic diagram shown;

[0025] Figure 3 for Figure 1 The schematic diagram of the temperature detection component structure shown;

[0026] Figure 4 for Figure 1 The schematic diagram of the fixed component structure shown;

[0027] Figure 5 A schematic structural diagram of a second embodiment of an online monitoring and thermal compensation device for thermal extension of a slitting machine blade shaft provided by the present invention;

[0028] Figure 6 for Figure 5 The schematic diagram of the side structure of the air intake hood shown;

[0029] Figure 7 for Figure 6 The schematic diagram of the back structure of the rotating plate shown;

[0030] Figure 8 This is a schematic structural diagram of a third embodiment of an online monitoring and thermal compensation device for thermal extension of a slitting machine blade shaft provided by the present invention.

[0031] Numbers in the figure: 1, bottom plate, 11, support frame, 12, support frame, 13, slide groove, 14, slide rod, 2, control cabinet, 3, first drive motor, 31, first knife shaft, 32, moving seat, 33, second drive motor, 34, second knife shaft, 35, telescopic cylinder, 4, hair dryer, 41, air pipe, 42, first air collecting frame, 43, air outlet window, 44, second air collecting frame, 5, temperature detection component, 51, rotating seat, 52 , magnetic plate, 53, mounting plate, 54, display screen, 55, infrared temperature detector, 6, fixing assembly, 61, fixing plate, 62, mounting screw, 63, universal adjustment rod, 64, mounting seat, 65, fixing ring, 66, locking screw, 7, air inlet cover, 71, filter screen, 72, rotating shaft, 73, rotating plate, 74, cleaning brush, 8, guide plate, 81, discharge port, 82, sealing plate, 83, positioning screw, 84, handle. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0033] First embodiment

[0034] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in, Figure 1 A schematic structural diagram of a first embodiment of an online monitoring and thermal compensation device for thermal extension of a slitting machine blade shaft provided by the present invention; Figure 2 for Figure 1 Another perspective structural schematic diagram shown; Figure 3 for Figure 1 The schematic diagram of the temperature detection component structure shown;

[0035] Figure 4 for Figure 1 A schematic diagram of the fixed component structure is shown. A device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft comprises: a bottom plate 1, a support frame 11 is fixedly installed on the top of the bottom plate 1, and a support frame 12 is fixedly installed on the top of the support frame 11;

[0036] A first knife shaft 31, the first knife shaft 31 is arranged at the top of the support frame 11, a second knife shaft 34 is arranged at the top of the first knife shaft 31, one end of the first knife shaft 31 is rotatably connected to the other side of the inner side of the support frame 12, and a first drive motor 3 is fixedly installed at the other end of the first knife shaft 31, and the first drive motor 3 is fixedly installed at one side of the support frame 12;

[0037] A control cabinet 2, wherein the control cabinet 2 is fixedly installed on the top of the base plate 1;

[0038] Two temperature detection components 5, both of which are arranged on the top of the control cabinet 2, and both of which include a rotating seat 51, a magnetic plate 52, a mounting plate 53, a display screen 54 and an infrared temperature detector 55, wherein the magnetic plate 52 is magnetically attracted to the top of the control cabinet 2, the rotating seat 51 is fixedly mounted on the top of the magnetic plate 52, the mounting plate 53 is rotatably connected to the inner side of the rotating seat 51, the display screen 54 is fixedly mounted on the front side of the mounting plate 53, and the two infrared temperature detectors 55 are respectively arranged on the front sides of the first knife shaft 31 and the second knife shaft 34;

[0039] A hair dryer 4 is fixedly installed on the top of the base plate 1, and two air pipes 41 are fixedly installed on the output end of the hair dryer 4, a first air collecting frame 42 is fixedly installed on the output end of one of the air pipes 41, and the first air collecting frame 42 is fixedly installed on the inside of the top of the support frame 12, and a second air collecting frame 44 is fixedly installed on the output end of the other air pipe 41, and the second air collecting frame 44 is fixedly installed on the inside of the top of the support frame 11, and air outlet windows 43 are fixedly installed on the bottom of the first air collecting frame 42 and the top of the second air collecting frame 44.

[0040] Slide grooves 13 are provided on both sides of the support frame 12, and a slide rod 14 is fixedly installed on the inner side of the slide groove 13, and a movable seat 32 is slidably connected to the outer side of the slide rod 14. A second drive motor 33 is fixedly installed on one side of the movable seat 32, and the output end of the second drive motor 33 is fixedly installed on one end of the second knife shaft 31, and one end of the second knife shaft 31 is rotatably connected to one side of the movable seat 32 on the other side.

[0041] Telescopic cylinders 35 are fixedly mounted on both ends of the top of the support frame 12 , and the output end of the telescopic cylinder 35 is fixedly mounted on the top of the moving seat 32 .

[0042] When in use, the moving end of the telescopic cylinder 35 drives the moving seat 32 to move up and down, and can drive the second knife shaft 34 to move up and down, so as to adjust the gap between the second knife shaft 34 and the first knife shaft 31, and when the second knife shaft 34 moves up and down, it will drive the moving seat 32 to slide on the outer side of the slide rod 14, thereby limiting the moving seat 32 and increasing the stability of the moving seat 32 when moving up and down.

[0043] Two fixing components 6 are provided on the front side of the support frame 12, and the two fixing components 6 each include a fixing plate 61, a mounting screw 62, a universal adjustment rod 63, a mounting seat 64, a fixing ring 65 and a locking screw 66. The mounting screw 62 is provided inside the fixing plate 61, the universal adjustment rod 63 is fixedly installed on the front side of the fixing plate 61, the mounting seat 64 is fixedly installed on one end of the universal adjustment rod 63, the fixing ring 65 is fixedly installed inside the mounting seat 64, and the locking screw 66 is threadedly connected to the inside of one end of one side of the fixing ring 65.

[0044] One end of the mounting screw 62 is threadedly connected to the front side of the support frame 12 , the infrared temperature detector 55 is arranged on the inner side of the fixing ring 65 , and one end of the locking screw 66 is arranged on one side of the infrared temperature detector 55 .

[0045] When in use, the user installs the fixing plate 61 on the front side of the support frame 12 by installing the screws 62, and then the user inserts the infrared temperature detector 55 into the inner side of the fixing ring 65, and then the user rotates the locking screw 66 to make one end of the locking screw 66 press against the infrared temperature detector 55, thereby limiting the infrared temperature detector 55, and then the user bends the universal adjustment rod 63 to align the detection end of the infrared temperature detector 55 with the front side of the knife shaft, thereby detecting the temperature of the first knife shaft 31 and the second knife shaft 34, and the fixing component 6 also facilitates the user to disassemble and adjust the angle of the infrared temperature detector 55, thereby facilitating the user's use.

[0046] The working principle of the online monitoring and thermal compensation device for thermal extension of the cutter shaft of the slitting machine provided by the present invention is as follows:

[0047] When in use, the first drive motor 3 and the second drive motor 33 respectively drive the first knife shaft 31 and the second knife shaft 34 to rotate to shear the steel coil, and at the same time, the two infrared temperature detectors 5 detect the temperature of the two knife shafts, so that the temperature is displayed on the display screen 54, and the data is uploaded to the computer to generate a temperature fluctuation graph. When the longitudinal shearing machine runs at high speed, the knife shaft exhibits thermal extension. During the real-time monitoring of the shaft temperature, when it is found that the temperature difference between the upper and lower shafts is about to exceed the critical value, the computer system inside the control cabinet 2 will automatically determine and automatically perform thermal compensation on the upper or lower knife shaft. At this time, the hair dryer 4 is started to blow the external air into the first air collecting frame 42 and the second air collecting frame 44 through the two air pipes 41, and then spray it out through the air outlet frame 43, thereby accelerating the air flow rate of the first knife shaft 31 and the second knife shaft 34, thereby cooling the first knife shaft 31 and the second knife shaft 34, so that the shaft temperature of the upper and lower knife shafts remains stable to ensure high-precision and high-quality shearing levels.

[0048] Compared with the related art, the device for online monitoring and thermal compensation of thermal extension of the cutter shaft of a slitting machine provided by the present invention has the following beneficial effects:

[0049] When the temperature detection component 5 is in use, the temperatures of the first blade shaft 31 and the second blade shaft 34 are respectively detected in real time. When the temperature difference between the two blade shafts is about to exceed the critical value, the system will automatically determine and automatically perform thermal compensation operation on the upper or lower blade shaft. The hair dryer 4 is used to blow air into the inside of the first air collecting frame 42 and the second air collecting frame 44 respectively to cool the upper and lower blade shafts, thereby maintaining the stability of the upper and lower blade shaft temperatures, thereby avoiding changes in the blade gap, improving the quality of steel coil shearing, and increasing the service life of the blade.

[0050] Second embodiment

[0051] Please refer to Figure 5 , Figure 6 and Figure 7 Based on the device for online monitoring and thermal compensation of thermal extension of the blade shaft of a slitting machine provided in the first embodiment of the present application, the second embodiment of the present application proposes another device for online monitoring and thermal compensation of thermal extension of the blade shaft of a slitting machine. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0052] Specifically, the difference of the online monitoring and thermal compensation device for thermal extension of the blade shaft of a slitting machine provided in the second embodiment of the present application is that, in the online monitoring and thermal compensation device for thermal extension of the blade shaft of a slitting machine, an air inlet hood 7 is fixedly installed on the input end of the blower 4, a filter screen 71 is fixedly installed on the inner side surface of the air inlet hood 7, and a rotating shaft 72 is rotatably connected to the inside of the filter screen 71.

[0053] A rotating plate 73 is fixedly mounted on one end of the rotating shaft 72 , and cleaning brushes 74 are fixedly mounted on both ends of the back side of the rotating plate 73 . The cleaning brushes 74 are attached to the front side of the filter screen 71 .

[0054] The working principle of the online monitoring and thermal compensation device for thermal extension of the cutter shaft of a slitting machine provided by the present invention is as follows:

[0055] When in use, the gas entering the hair dryer 4 is filtered by the filter 71, so that impurities are accumulated on the filter 71 to prevent the impurities from entering the interior of the hair dryer 4, and then the impurities are blown onto the blade shaft. When the impurities need to be cleaned later, the user can rotate the rotating plate 73, so that the rotating plate 73 drives the cleaning brush 74 to clean the impurities on the filter 71.

[0056] Compared with the related art, the device for online monitoring and thermal compensation of thermal extension of the cutter shaft of a slitting machine provided by the present invention has the following beneficial effects:

[0057] Through the cooperation of the air intake hood 7, filter 71, rotating shaft 72, rotating plate 73 and cleaning brush 74 and other structures, the filter 71 can block impurities during use to prevent the impurities from being blown onto the blade shaft and affecting the normal use of the blade shaft. The cleaning brush 74 is driven to rotate by the rotating plate 73, thereby facilitating the user to clean the impurities on the filter 71.

[0058] Third embodiment

[0059] Please refer to Figure 8 Based on the first embodiment of the present application, a device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft is provided. The third embodiment of the present application proposes another device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft. The third embodiment is only a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the independent implementation of the first embodiment.

[0060] Specifically, the difference of the online monitoring and thermal compensation device for thermal extension of the blade shaft of a slitting machine provided in the third embodiment of the present application is that, in the online monitoring and thermal compensation device for thermal extension of the blade shaft of a slitting machine, a discharge port 81 is opened on the front side of the second air collecting hood 42, and a sealing plate 82 is arranged on the front side of the discharge port 81.

[0061] Positioning screws 83 are disposed inside the top and bottom of both ends of the front side of the sealing plate 82 , and one end of the positioning screw 83 is threadedly connected to the front side of the second air collecting frame 44 .

[0062] A material guide plate 8 is fixedly mounted on the inner side surface of the second air collecting frame 44 , and a handle 84 is fixedly mounted on the front surface of the sealing plate 82 .

[0063] The working principle of the online monitoring and thermal compensation device for thermal extension of the cutter shaft of a slitting machine provided by the present invention is as follows:

[0064] When thermal compensation is not performed, when impurities fall through the air outlet window 43 to the inner side of the second air collecting frame 44, the user can rotate the positioning screw 83 so that one end of the positioning screw 83 is threaded out from the front side of the second air collecting frame 44, and then the user holds the handle 84 to move the sealing plate 82, and then the impurities on the inner side of the second air collecting frame 44 are discharged through the guide plate 8.

[0065] Compared with the related art, the device for online monitoring and thermal compensation of thermal extension of the cutter shaft of a slitting machine provided by the present invention has the following beneficial effects:

[0066] By cooperating with each other, structures such as the guide plate 8, the discharge port 81, the sealing plate 82, the positioning screw 83 and the handle 84, when in use, impurities are discharged from the inner side of the second air collecting frame 44 through the guide plate 8 and the discharge port 81, thereby facilitating cleaning by the user.

[0067] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An online monitoring and thermal compensation device for thermal extension of a slitting machine blade shaft, characterized in that: include: A bottom plate, a support frame is fixedly installed on the top of the bottom plate, and a support frame is fixedly installed on the top of the support frame; A first knife shaft, wherein the first knife shaft is arranged at the top of the support frame, a second knife shaft is arranged at the top of the first knife shaft, one end of the first knife shaft is rotatably connected to the other side of the inner side of the support frame, and a first drive motor is fixedly installed at the other end of the first knife shaft, and the first drive motor is fixedly installed at one side of the support frame; A control cabinet, the control cabinet is fixedly installed on the top of the base plate; Two temperature detection components, both of which are arranged on the top of the control cabinet, and both of which include a rotating seat, a magnetic plate, a mounting plate, a display screen and an infrared temperature detector, wherein the magnetic plate is magnetically attracted to the top of the control cabinet, the rotating seat is fixedly mounted on the top of the magnetic plate, the mounting plate is rotatably connected to the inner side of the rotating seat, the display screen is fixedly mounted on the front side of the mounting plate, and the two infrared temperature detectors are respectively arranged on the front sides of the first blade shaft and the second blade shaft; A hair dryer, the hair dryer is fixedly installed on the top of the base plate, and two air pipes are fixedly installed on the output end of the hair dryer, a first air collecting frame is fixedly installed on the output end of one of the air pipes, and the first air collecting frame is fixedly installed inside the top of the support frame, and a second air collecting frame is fixedly installed on the output end of the other air pipe, and the second air collecting frame is fixedly installed inside the top of the support frame, and air outlet windows are fixedly installed on the bottom of the first air collecting frame and the top of the second air collecting frame.

2. The device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft according to claim 1 is characterized in that: Slide grooves are provided on both sides of the support frame, a slide rod is fixedly installed on the inner side of the slide groove, and a moving seat is slidably connected to the outer side of the slide rod. A second driving motor is fixedly installed on one side of the moving seat, and the output end of the second driving motor is fixedly installed on one end of the second knife shaft, and one end of the second knife shaft is rotatably connected to one side of the moving seat on the other side.

3. The device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft according to claim 2 is characterized in that: Telescopic cylinders are fixedly mounted on both ends of the top of the support frame, and output ends of the telescopic cylinders are fixedly mounted on the top of the moving seat.

4. The device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft according to claim 3 is characterized in that: Two fixing components are arranged on the front side of the support frame, and both of the two fixing components include a fixing plate, a mounting screw, a universal adjustment rod, a mounting seat, a fixing ring and a locking screw. The mounting screw is arranged inside the fixing plate, the universal adjustment rod is fixedly installed on the front side of the fixing plate, the mounting seat is fixedly installed on one end of the universal adjustment rod, the fixing ring is fixedly installed inside the mounting seat, and the locking screw is threadedly connected to the inside of one end of one side of the fixing ring.

5. The device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft according to claim 4 is characterized in that: One end of the mounting screw is threadedly connected to the front side of the support frame, the infrared temperature detector is arranged on the inner side of the fixing ring, and one end of the locking screw is arranged on one side of the infrared temperature detector.

6. The device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft according to claim 1, characterized in that: An air inlet cover is fixedly mounted on the input end of the hair dryer, a filter is fixedly mounted on the inner side of the air inlet cover, and a rotating shaft is rotatably connected inside the filter.

7. The device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft according to claim 6, characterized in that: A rotating plate is fixedly mounted on one end of the rotating shaft, and cleaning brushes are fixedly mounted on both ends of the back side of the rotating plate, and the cleaning brushes are attached to the front side of the filter screen.

8. The device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft according to claim 1, characterized in that: A discharge port is provided on the front of the second air collecting hood, and a sealing plate is provided on the front of the discharge port.

9. The device for online monitoring and thermal compensation of thermal extension of a slitting machine blade shaft according to claim 8, characterized in that: Positioning screws are provided inside the top and bottom of both ends of the front side of the sealing plate, and one end of the positioning screw is threadedly connected to the front side of the second air collecting frame.

10. The device for online monitoring and thermal compensation of thermal extension of the blade shaft of a slitting machine according to claim 9, characterized in that: A material guide plate is fixedly mounted on the inner side surface of the second air collecting frame, and a handle is fixedly mounted on the front surface of the sealing plate.

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