Heating device of cathode roller

Abstract

The heating device of the cathode roller comprises the cathode roller, a first supporting rod, a second supporting rod, a cross rod, a plurality of quartz tubes and a plurality of electric heating elements, the first supporting rod is fixed on the ground, the second supporting rod is fixed on the ground, the cathode roller is arranged between the first supporting rod and the second supporting rod, and the quartz tubes are arranged on the cross rod. One end of the cross rod is movably connected with the first supporting rod, the other end of the cross rod is movably connected with the second supporting rod, the cross rod is arranged above the cathode roller, the quartz tubes penetrate through the cross rod and move along the circumference of the cross rod, and each electric heating element is arranged in the corresponding quartz tube. And each electric heating element is used for heating the corresponding quartz tube. The quartz tube is arranged on the cross rod, and the electric heating element is arranged in the quartz tube, so that the quartz tube is heated, and when the cathode roller needs to be heated, different heating temperatures can be provided by adjusting different positions of the quartz tube on the cross rod.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic copper foil, in particular to a heating device for a cathode roller. Background Art

[0002] Electrolytic copper foil is a foil material with a thickness of micrometer level, which is made of copper as raw material and prepared by electrolytic reaction. It is widely used in electronic products such as copper clad laminates, printed circuit boards and lithium-ion batteries. With the vigorous development of the copper foil industry, the production level of various enterprises has been greatly improved. In addition to the basic physical properties of copper foil, the ability to make large rolls has also become an important measure of the production level of an enterprise. In the production of copper foil, it is often encountered that the edge is torn, which is fatal to the production of copper foil with large width and long rolls. Most domestic copper foil manufacturers build their bases in the south with higher temperatures, while manufacturers who build their bases in the north have to consider the adverse effects of lower temperatures in winter on copper foil production. For example, in the process of copper foil production, the temperature of the electrolyte is generally maintained at 80-90℃. Even in winter, it is not difficult to maintain this temperature by relying on the heat release of the copper dissolving reaction itself. However, due to the exposure of some cathode rollers to the air, the surface temperature is far below 80℃, which will have an adverse effect on the production of copper foil, and the biggest hazard is the occurrence of edge tearing. The reason is that, firstly, the lower roller surface temperature will lead to a decrease in the solubility of the copper sulfate electrolyte, and even crystallization. Secondly, the lower roller surface temperature will affect the activity and solubility of some additives in the electrolyte, and then affect the entire foil production process. Finally, the lower roller surface temperature will affect the wettability and roughness of the cathode roller surface, causing defects of varying degrees on the copper foil surface. In the past, various companies have solved this problem by increasing the electrolyte temperature, increasing the number of cathode roller grinding and polishing times, and increasing the production environment temperature. Although these methods can achieve certain results, they also face the problems of high energy consumption and a greater impact on the production system. Utility Model Content

[0003] In order to solve the above technical problems, the present utility model is proposed. The embodiment of the present utility model provides a cathode roller heating device, which solves the edge tearing problem in copper foil production in the prior art.

[0004] According to one aspect of the utility model, a heating device for a cathode roller is provided, comprising:

[0005] Cathode roller;

[0006] A first support rod, wherein the first support rod is fixed on the ground;

[0007] a second support rod, wherein the second support rod is fixed on the ground, and the cathode roller is arranged between the first support rod and the second support rod;

[0008] a cross bar, one end of which is movably connected to the first support bar, the other end of which is movably connected to the second support bar, and the cross bar is arranged above the cathode roller;

[0009] a plurality of quartz tubes, the plurality of quartz tubes passing through the crossbar and the plurality of quartz tubes moving along the circumference of the crossbar;

[0010] A plurality of electric heating elements are provided, each of which is arranged inside a corresponding quartz tube, and each of which is used to heat the corresponding quartz tube.

[0011] In one embodiment, the heating device of the cathode roller further comprises a temperature measuring device, which is fixed on the cross bar and is used to measure the temperature of the surface and both sides of the cathode roller.

[0012] In one embodiment, the first support rod sleeve is provided with a first sliding device, the first sliding device is fixedly connected to the first end of the cross rod, and the first sliding device is used to drive the first end of the cross rod to slide along the extension direction of the first support rod.

[0013] In one embodiment, the second support rod sleeve is provided with a second sliding device, the second sliding device is fixedly connected to the second end of the cross rod, and the second sliding device is used to drive the second end of the cross rod to slide along the extension direction of the second support rod.

[0014] In one embodiment, the heating device of the cathode roller also includes a displacement controller, which is respectively connected to the first sliding device, the second sliding device and the temperature measuring device, and a displacement sensor is respectively arranged on the first sliding device and the second sliding device. The displacement controller is used to control the first sliding device to drive the cross bar to slide along the extension direction of the first support rod and to control the second sliding device to drive the cross bar to slide along the extension direction of the second support rod.

[0015] In one embodiment, the first sliding device includes a first hook and a first sliding block, the first sliding block is fixedly connected to the first hook, the first sliding block is sleeved on the first support rod, and the first hook is used to support the first end of the cross rod.

[0016] In one embodiment, the second sliding device includes a second sliding block and a second hook, the second sliding block is fixedly connected to the second hook, the second sliding block is sleeved on the second support rod, and the second hook is used to support the second end of the cross rod.

[0017] In one embodiment, the heating device of the cathode roller also includes a first fixing device, the first sliding block is provided with a first through hole, the first support rod is provided with a plurality of second through holes in the axial direction, one end of the first fixing device passes through the first through hole and is fixed inside a second through hole among the plurality of second through holes.

[0018] In one embodiment, the heating device of the cathode roller also includes a second fixing device, the second sliding block is provided with a third through hole, the second support rod is provided with a plurality of fourth through holes in the axial direction, one end of the second fixing device passes through the third through hole and is fixed inside a fourth through hole among the plurality of fourth through holes.

[0019] In one embodiment, three fixing rods are fixedly connected to the bottom of the first support rod, and the angle between two fixing rods is 120 degrees.

[0020] The heating device of the cathode roller provided by the utility model comprises: a cathode roller, a first support rod, a second support rod, a cross bar, a plurality of quartz tubes and a plurality of electric heating elements, wherein the first support rod is fixed on the ground, the second support rod is fixed on the ground, and a cathode roller is arranged between the first support rod and the second support rod, one end of the cross bar is movably connected with the first support rod, and the other end of the cross bar is movably connected with the second support rod, the cross bar is arranged above the cathode roller, a plurality of quartz tubes pass through the cross bar and the plurality of quartz tubes move along the circumference of the cross bar, each electric heating element is arranged inside a corresponding quartz tube, and each electric heating element is used to heat a corresponding quartz tube. By arranging the quartz tube on the cross bar and arranging the electric heating element inside the quartz tube, the quartz tube is heated, and when the cathode roller needs to be heated, different heating temperatures can be provided by adjusting different positions of the quartz tube on the cross bar, thereby improving the wettability of the cathode roller surface and preventing the copper foil from having the problem of edge tearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other purposes, features and advantages of the present invention will become more apparent by describing the embodiments of the present invention in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0022] Figure 1 It is a schematic structural diagram of copper foil generation provided by an exemplary embodiment of the utility model.

[0023] Figure 2 It is a structural schematic diagram of a cathode roller heating device provided by an exemplary embodiment of the utility model.

[0024] Figure 3 It is a structural schematic diagram of a heating device for a cathode roller provided by another exemplary embodiment of the utility model.

[0025] Figure 4 It is a side view of a heating device for a cathode roller provided by an exemplary embodiment of the present utility model.

[0026] Description of reference numerals:

[0027] 11. cathode roller; 12. first support rod; 13. second support rod; 14. cross bar; 15. quartz tube; 16. temperature measuring device; 171. first hook; 172. first sliding block; 18. first fixing device; 121. second through hole; 122. fixing rod. DETAILED DESCRIPTION

[0028] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described here.

[0029] Figure 1 Schematic diagram of the structure of copper foil generation provided by an exemplary embodiment of the utility model. Figure 1 As shown, the electrolyte enters the anode tank 2 from the liquid inlet, and then deposits on the surface of the cathode roller 11 after the electrolytic reaction. After being stripped by the stripping roller 8, it can be rolled up by the winding roller 9 to complete the foil production process. After the cathode roller comes out of the electrolyte, it will be affected by the low temperature environment, which will cause the edge of the copper foil to tear, so the cathode roller surface needs to be heated to maintain its surface temperature.

[0030] Figure 2 Schematic diagram of the structure of a cathode roller heating device provided by an exemplary embodiment of the utility model. Figure 2 As shown, the heating device of the cathode roller includes:

[0031] A cathode roller 11, a first support rod 12, a second support rod 13, a cross bar 14, a plurality of quartz tubes 15 and a plurality of electric heating elements, wherein the first support rod 12 is fixed on the ground, the second support rod 13 is fixed on the ground, and the cathode roller 11 is arranged between the first support rod 12 and the second support rod 13, one end of the cross bar 14 is movably connected to the first support rod 12, and the other end of the cross bar 14 is movably connected to the second support rod 13, the cross bar 14 is arranged above the cathode roller 11, a plurality of quartz tubes 15 pass through the cross bar 14 and the plurality of quartz tubes 15 move along the circumference of the cross bar 14, each electric heating element is arranged inside a corresponding quartz tube 15, and each electric heating element is used to heat a corresponding quartz tube 15.

[0032] In the embodiment of the utility model, since the lower roller surface temperature during electrolysis of copper foil will affect the wettability and roughness of the surface of the cathode roller 11, causing defects of varying degrees on the surface of the copper foil, a heating device is added around the cathode roller 11 to increase the surface temperature of the cathode roller 11, thereby preventing the copper foil from tearing. Here, tearing refers to the phenomenon that the edge is uneven or damaged.

[0033] Specifically, a first support rod 12 and a second support rod 13 are provided to support the entire heating device, and one end of the first support rod 12 and the second support rod 13 are fixed on the ground, thereby improving the stability of the fixing of the entire heating device. Then the other end of the first support rod 12 is movably connected to one end of the cross bar 14, and the other end of the second support rod 13 is movably connected to the other end of the cross bar 14, and the cross bar 14 can move along the axis of the first support rod 12 or the second support rod 13. In order to heat the surface of the cathode roller 11, a plurality of quartz tubes 15 are provided on the cross bar 14, and the plurality of quartz tubes 15 can pass through the cross bar 14 and can move along the circumference of the cross bar 14, that is, move parallel to the ground. By adjusting the positions of the plurality of quartz tubes 15, different temperatures can be provided to the surface of the cathode roller 11.

[0034] Since the quartz tube 15 itself does not have a heating property, an electric heating element is arranged inside the quartz tube 15, and the quartz tube 15 is heated by the electric heating element. Among them, the quartz tube 15 is a tubular product made of quartz material. Quartz is a high-purity silicon dioxide (SiO2) with excellent thermal stability, chemical stability and optical transparency. The quartz tube 15 can withstand high temperature environments and can withstand temperatures up to about 1200°C without significant deformation or cracking.

[0035] Optionally, the electric heating element may include an electric heating coil or a heating wire, through which heat is transferred to the quartz tube 15 to heat it to a desired temperature. The heating wire is a linear element made of a resistance wire that can generate heat by passing electricity. The heating wire can be wound around the quartz tube or arranged inside the quartz tube 15, and the quartz tube 15 is heated to a desired temperature by the heat of the heating wire.

[0036] Optionally, the motor thermal element may further include a heating plate, which is a planar electric heating element that can be used to heat the outer surface of the quartz tube. The heating plate is made of a material with good thermal conductivity, such as aluminum or stainless steel, and its surface is covered with a resistance heating wire or an electric heating film. By energizing, the heating plate generates heat and transfers it to the quartz tube 15.

[0037] Optionally, the motor thermal element may further include a heating belt, which is a strip-shaped electric heating element that can be wrapped around the quartz tube 15. The heating belt is made of a conductive material, and its surface is covered with a heating wire or an electric heating film. By energizing, the heating belt generates heat and conducts it to the quartz tube 15.

[0038] The heating device of the cathode roller provided by the utility model comprises: a cathode roller, a first support rod, a second support rod, a cross bar, a plurality of quartz tubes and a plurality of electric heating elements, wherein the first support rod is fixed on the ground, the second support rod is fixed on the ground, and a cathode roller is arranged between the first support rod and the second support rod, one end of the cross bar is movably connected with the first support rod, and the other end of the cross bar is movably connected with the second support rod, the cross bar is arranged above the cathode roller, a plurality of quartz tubes pass through the cross bar and the plurality of quartz tubes move along the circumference of the cross bar, each electric heating element is arranged inside a corresponding quartz tube, and each electric heating element is used to heat a corresponding quartz tube. By arranging the quartz tube on the cross bar and arranging the electric heating element inside the quartz tube, the quartz tube is heated, and when the cathode roller needs to be heated, different heating temperatures can be provided by adjusting different positions of the quartz tube on the cross bar, thereby improving the wettability of the cathode roller surface and preventing the copper foil from having the problem of edge tearing.

[0039] Figure 3 FIG. 1 is a schematic diagram of a heating device for a cathode roller provided by another exemplary embodiment of the present invention. Figure 3 As shown, the heating device of the cathode roller may further include a temperature measuring device 16 , which is fixed on the cross bar 14 and is used to measure the temperature of the surface and both sides of the cathode roller 11 .

[0040] In the embodiment of the utility model, in order to determine the temperature of the surface and both sides of the cathode roller 11, a temperature measuring device 16 is fixedly connected to the cross bar 14, and the temperature of the surface and both sides of the cathode roller 11 is measured by the temperature measuring device 16. Among them, the temperature measuring device 16 can be an infrared temperature measuring device, which is a device for non-contact measurement of the surface temperature of an object. It uses the principle of infrared radiation to detect the thermal radiation of an object and then converts it into a temperature value. The infrared temperature measuring device is usually composed of the following components: infrared sensor: The infrared sensor is the core component of the device, which can receive infrared radiation emitted by an object. Optical system: The optical system includes a lens and a filter for collecting and filtering infrared radiation. The lens focuses the infrared radiation and directs it to the sensor, while the filter is used to shield the unnecessary spectral range to improve the accuracy of the measurement. Signal processor: The signal processor converts the infrared signal received by the sensor into a temperature value. It calculates the temperature of the surface of the object through an algorithm based on the output signal of the sensor and the pre-set calibration parameters. Display and interface: The temperature measuring device is equipped with a built-in display screen for directly displaying the measurement results. At the same time, it can also provide an interface connection to transfer data to a computer or other device for analysis and recording.

[0041] In one embodiment, the first support rod sleeve is provided with a first sliding device, the first sliding device is fixedly connected to the first end of the cross rod, and the first sliding device is used to drive the first end of the cross rod to slide along the extension direction of the first support rod.

[0042] In an embodiment of the utility model, in order to make the cross bar slide more smoothly, a first sliding device can be mounted on the first support bar. The first sliding device is fixedly connected to the first end of the cross bar, so that the first sliding device can drive the first end of the cross bar to slide along the extension direction of the first support bar.

[0043] In one embodiment, the second support rod sleeve is provided with a second sliding device, the second sliding device is fixedly connected to the second end of the cross rod, and the second sliding device is used to drive the second end of the cross rod to slide along the extension direction of the second support rod.

[0044] In an embodiment of the utility model, in order to allow both the first end and the second end of the cross bar to slide, the second support rod is also provided with a second sliding device, which is fixedly connected to the second end of the cross bar. The second sliding device can drive the second end of the cross bar to slide along the extension direction of the second support rod.

[0045] The first sliding device and the second sliding device are connected to the temperature measuring device respectively, and the temperature measuring device opens or closes the first sliding device and the second sliding device according to the detected surface temperature of the cathode roller.

[0046] In one embodiment, the heating device of the cathode roller may further include a displacement controller, which is respectively connected to the first sliding device, the second sliding device and the temperature measuring device, and a displacement sensor is respectively arranged on the first sliding device and the second sliding device. The displacement controller is used to control the first sliding device to drive the cross bar to slide along the extension direction of the first support rod and to control the second sliding device to drive the cross bar to slide along the extension direction of the second support rod.

[0047] In an embodiment of the utility model, in order to automatically control the movement of the first sliding device and the second sliding device, a displacement sensor is arranged on the first sliding device and the second sliding device. When the temperature measuring device measures that the surface temperature of the cathode roller is greater than or equal to the electrolyte temperature, the displacement sensor controls the first sliding device and the second sliding device to move away from the ground, thereby adjusting the distance between the quartz tube and the cathode roller, and then adjusting the temperature of the cathode roller surface to be consistent with the electrolyte temperature.

[0048] In addition, the surface temperature of the cathode roller can also be adjusted by the size of the quartz tube, and the temperature difference between the middle and both sides of the cathode tube can be adjusted by moving the quartz tube horizontally.

[0049] Optionally, the temperature measuring device 16 amplifies the detected temperature signal and transmits it to the photoelectric detection system, where the photoelectric detection system amplifies the temperature and outputs a photoelectric signal to be input into the displacement sensor.

[0050] Figure 4 1 is a side view of a heating device for a cathode roller provided by an exemplary embodiment of the present invention. Figure 4 As shown, the first sliding device includes a first hook 171 and a first sliding block 172 . The first sliding block 172 is fixedly connected to the first hook 171 . The first sliding block 172 is sleeved on the first support rod 12 . The first hook 171 is used to support the first end of the cross bar 14 .

[0051] In the embodiment of the utility model, in order to flexibly connect the first end of the cross bar 14 with the first support bar 12 and also drive the first end of the cross bar 14 to slide along the extension direction of the first support bar 12, a first hook 171 and a first sliding block 172 are provided, and the first hook 171 can support the first end of the cross bar 14, that is, the first hook 171 can fix the first end of the cross bar 14. The first sliding block 172 is sleeved on the first support bar 12, so that the first sliding block 172 drives the first hook 171 to slide, and the sliding of the first hook 171 drives the first end of the cross bar 14 to slide.

[0052] In one embodiment, the second sliding device includes a second sliding block and a second hook, the second sliding block is fixedly connected to the second hook, the second sliding block is sleeved on the second support rod 13, and the second hook is used to support the second end of the cross bar 14.

[0053] In the embodiment of the utility model, in order to flexibly connect the second end of the cross bar 14 with the second support bar 13 and drive the second end of the cross bar 114 to slide along the extension direction of the second support bar 13, a second hook and a second sliding block are provided, and the second hook can support the second end of the cross bar 14, that is, the second hook can fix the second end of the cross bar 14. The second sliding block is sleeved on the second support bar, so that the second sliding block drives the second hook to slide, and the sliding of the second hook drives the second end of the cross bar to slide.

[0054] like Figure 4 As shown, the heating device of the cathode roller can also include a first fixing device 18, the first sliding block 172 is provided with a first through hole, the first support rod 12 is provided with a plurality of second through holes 121 in the axial direction, one end of the first fixing device 18 passes through the first through hole and is fixed inside a second through hole 121 among the plurality of second through holes 121.

[0055] In the embodiment of the utility model, since the first sliding device can be fixed on the first support rod 12 when it slides into place to limit the sliding of the first end of the cross bar, a first fixing device 18 is provided, and one end of the first fixing device 18 passes through the first through hole of the first sliding block 172, and then passes through the interior of one of the multiple second through holes 121 on the first support rod 12, thereby fixing the first sliding block 172 on the first support rod 12.

[0056] Optionally, the first fixing device 18 may be a cylinder.

[0057] The plurality of second through holes 121 are evenly distributed along the extension direction of the first support rod 12 .

[0058] In one embodiment, the heating device of the cathode roller may further include a second fixing device, the second sliding block is provided with a third through hole, the second support rod is provided with a plurality of fourth through holes in the axial direction, one end of the second fixing device passes through the third through hole and is fixed inside a fourth through hole among the plurality of fourth through holes.

[0059] In the embodiment of the utility model, since the second sliding device can be fixed on the second support rod when it slides into place to limit the sliding of the second end of the cross rod, a second fixing device is provided, and one end of the second fixing device passes through the third through hole of the second sliding block, and then passes through the inside of one of the multiple fourth through holes on the second support rod, thereby fixing the second sliding block on the second support rod.

[0060] Optionally, the second fixing device may be a cylinder.

[0061] Wherein, the plurality of fourth through holes are evenly distributed along the extension direction of the second support rod.

[0062] like Figure 1 As shown, three fixing rods 122 are fixedly connected to the bottom of the first support rod 12, and the angle between two fixing rods 122 is 120 degrees.

[0063] In the embodiment of the utility model, in order to improve the stability of the fixing of the first support rod 12, three fixing rods 122 are fixedly connected to the bottom of the first support rod 12, and the angle between every two fixing rods is 120 degrees, so that the first support rod 12 can be stably supported.

[0064] In one embodiment, three vertical rods are fixedly connected to the bottom of the second support rod, and the angle between two vertical rods is 120 degrees.

[0065] In the embodiment of the utility model, in order to improve the stability of the second support rod, three vertical rods are fixedly connected to the bottom of the second support rod, and the angle between every two vertical rods is 120 degrees, so that the second support rod can be stably supported.

[0066] The working principle of the utility model is as follows: the quartz tube can be moved laterally on the crossbar, and the number and specifications (length, power, etc.) of the quartz tube can be adjusted. In addition, there is an infrared temperature measuring device in the middle of the crossbar, which is responsible for measuring the temperature in the middle and on both sides of the cathode roller, and converts the temperature signal through the internal sensor and transmits it to the displacement controller. After receiving the signal, the displacement controller can control the sliding device with hooks on the first support rod and the second support rod to move up and down. The sliding device is attached with a hook for supporting and fixing the crossbar. When the first sliding device and the second sliding device stop moving, the first fixing device fixes the first sliding device and the second fixing device fixes the second sliding device. The movement and start and stop of the first sliding device and the second sliding device depend on the surface temperature of the cathode roller measured by the infrared temperature measuring device. The infrared temperature measuring device measures the infrared energy radiated by the cathode roller itself to accurately measure the surface temperature in the middle and on both sides of the cathode roller, and then transmits the temperature signal to the photoelectric detection system through the sensor. The signal is then amplified and converted and output by the electronic signal conversion device. The output signal then enters the displacement controller to control the start, stop and movement of the first sliding device on the first support rod and the second sliding device on the second support rod. The infrared temperature measuring device is equipped with a sensor, which can identify and judge the measured surface temperature of the cathode roller. If the surface temperature of the cathode roller is lower than the electrolyte temperature, the signal will be converted and transmitted to the displacement controller to control the first support rod and the second support rod to approach the cathode roller. If the infrared temperature measuring device measures that the surface temperature of the cathode roller is greater than or equal to the electrolyte temperature, the displacement controller controls the first sliding device and the second sliding device to move away from the cathode roller.

[0067] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the utility model to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A cathode roller heating device, characterized in that: include: Cathode roller (11); A first support rod (12), wherein the first support rod (12) is fixed on the ground; a second support rod (13), the second support rod (13) being fixed on the ground, and the cathode roller (11) being arranged between the first support rod (12) and the second support rod (13); a cross bar (14), one end of the cross bar (14) being movably connected to the first support bar (12), the other end of the cross bar (14) being movably connected to the second support bar (13), and the cross bar (14) being arranged above the cathode roller (11); A plurality of quartz tubes (15), the plurality of quartz tubes (15) passing through the crossbar (14) and the plurality of quartz tubes (15) moving along the circumference of the crossbar (14); A plurality of electric heating elements, each of which is arranged inside a corresponding quartz tube (15), and each of which is used to heat the corresponding quartz tube (15).

2. The cathode roller heating device according to claim 1, characterized in that: It also includes a temperature measuring device (16), which is fixed on the cross bar (14) and is used to measure the temperature of the surface and both sides of the cathode roller (11).

3. The cathode roller heating device according to claim 2, characterized in that: The first support rod (12) is sleeved with a first sliding device, the first sliding device is fixedly connected to the first end of the cross rod (14), and the first sliding device is used to drive the first end of the cross rod (14) to slide along the extension direction of the first support rod (12).

4. The cathode roller heating device according to claim 3, characterized in that: The second support rod (13) is sleeved with a second sliding device, the second sliding device is fixedly connected to the second end of the cross rod (14), and the second sliding device is used to drive the second end of the cross rod (14) to slide along the extension direction of the second support rod (13).

5. The cathode roller heating device according to claim 4, characterized in that: The invention also includes a displacement controller, which is respectively connected to the first sliding device, the second sliding device and the temperature measuring device (16), and one displacement controller is respectively arranged on the first sliding device and the second sliding device, and the displacement controller is used to control the first sliding device to drive the cross bar (14) to slide along the extension direction of the first support bar (12) and to control the second sliding device to drive the cross bar (14) to slide along the extension direction of the second support bar (13).

6. The cathode roller heating device according to claim 4, characterized in that: The first sliding device comprises a first hook (171) and a first sliding block (172), wherein the first sliding block (172) is fixedly connected to the first hook (171), the first sliding block (172) is sleeved on the first supporting rod (12), and the first hook (171) is used to support the first end of the cross rod (14).

7. The cathode roller heating device according to claim 6, characterized in that: The second sliding device comprises a second sliding block and a second hook, the second sliding block is fixedly connected to the second hook, the second sliding block is sleeved on the second supporting rod (13), and the second hook is used to support the second end of the cross rod (14).

8. The cathode roller heating device according to claim 7, characterized in that: It also includes a first fixing device (18), the first sliding block (172) is provided with a first through hole, the first support rod (12) is provided with a plurality of second through holes (121) in the axial direction, and one end of the first fixing device (18) passes through the first through hole and is fixed inside a second through hole (121) among the plurality of second through holes (121).

9. The cathode roller heating device according to claim 8, characterized in that: It also includes a second fixing device, the second sliding block is provided with a third through hole, the second support rod (13) is provided with a plurality of fourth through holes in the axial direction, one end of the second fixing device passes through the third through hole and is fixed inside a fourth through hole among the plurality of fourth through holes.

10. The cathode roller heating device according to claim 1, characterized in that: Three fixing rods (122) are fixedly connected to the bottom of the first support rod (12), and the angle between two fixing rods (122) is 120 degrees.

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