Preparation equipment and preparation method of high-temperature-resistant inorganic insulation signal cable

Abstract

The invention relates to preparation equipment and technology of a high-temperature-resistant inorganic insulating signal cable, and relates to the technical field of chemical production, the preparation equipment comprises extrusion molding equipment, a detection assembly, an adjusting mechanism and a processing device, the extrusion molding equipment comprises an extrusion molding machine, an extrusion molding pipe is installed on the extrusion molding machine, an insulating cable core penetrates through the extrusion molding pipe, and the processing device is connected with the detection assembly. The plastic extruding machine wraps the insulating cable core with the coating layer material to form a cable; the detection assembly is used for detecting the thickness of a cable coating layer; the adjusting mechanism is used for adjusting the position of the insulated cable core in the extruded pipe, so that the insulated cable core is located at the circle center position of the extruded pipe; and the processing device is used for performing corresponding processing on the cable of which the thickness of the coating layer does not meet the standard. According to the invention, the coating layer can be uniformly distributed on the insulated cable core, and the high temperature resistance and the insulation performance of the cable can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of cable manufacturing equipment, and in particular to a preparation device and a preparation method for a high-temperature resistant inorganic insulated signal cable. Background Art

[0002] If the cable is operated for a long time at a load exceeding its rated load, the operating temperature of the cable insulation material will exceed the maximum allowable temperature of normal heating, causing the cable insulation material to age and dry out, which in turn causes a fire. Therefore, my country's demand for high-temperature resistant inorganic insulated signal cables is growing. High-temperature resistant insulated cables have excellent fire prevention and fire resistance. In the cable structure design, a layer of fire-resistant and expansion coating is added. Under flame conditions, the volume of the coating expands, making the cable insulation structure more stable, and it can continue to maintain power supply in the event of a fire close to the melting point of copper.

[0003] During the extrusion process of the coating, the cable is placed into an extrusion tube for extrusion of the coating, and finally a cable having the same thickness as the inner wall of the extruded tube is formed. When there is a deviation in the alignment between the cable and the center hole of the extruder, the cable is not at the center of the extrusion tube when it enters the extrusion tube, which can easily lead to uneven wrapping of the cable coating. There is a large difference in the distance between the outer skin of the coating and the cable core, which makes the coating on one side of the cable too thick and the coating on the other side too thin. The uneven coating thickness will affect the electrical and mechanical properties of the cable. In extreme cases, if the coating thickness on one side is too thin, breakdown or short circuit may occur. Summary of the invention

[0004] The purpose of this application is to provide a preparation device and a preparation method for a high-temperature resistant inorganic insulated signal cable, which can make the coating layer evenly distributed on the cable, make the distance from the center of the cable to the outer skin of the coating layer equal, and improve the high-temperature resistance of the cable.

[0005] In the first aspect, the present application provides a preparation device for a high temperature resistant inorganic insulated signal cable, which adopts the following technical solution: A preparation device for a high temperature resistant inorganic insulated signal cable, comprising: An extrusion device, the extrusion device comprises an extruder, the extruder is equipped with an extrusion tube, the insulated cable core passes through the extrusion tube, and the extruder wraps the coating material on the insulated cable core to form a cable line; A detection component, wherein the detection component is used to detect the thickness of the cable coating; An adjusting mechanism, wherein the adjusting mechanism is used to adjust the position of the insulated cable core in the extruded tube so that the insulated cable core is located at the center of the extruded tube; A processing device is used to perform corresponding processing on cables whose coating thickness does not meet the standards.

[0006] Optionally, the detection component includes an ultrasonic detector, which can measure the thickness of the coating layer at multiple relative points on the outer wall of the cable, and send instructions to the adjustment mechanism through the control system to adjust the insulated cable core to the center of the extruded tube.

[0007] Optionally, the ultrasonic detector can also detect bubbles or hollows in the cable sheath.

[0008] Optionally, the adjustment mechanism includes an electric telescopic rod, a fixed frame is provided at the output end of the electric telescopic rod, a guide rail is provided between the fixed frames, a fixed block is slidably provided on the guide rail, and a sliding hole is opened in the fixed block for the insulated cable core to pass through.

[0009] Optionally, an aperture control component is provided in the fixed block, and the aperture control component can adjust the aperture size of the sliding hole and is used to limit the insulated cable cores with different apertures.

[0010] Optionally, the processing device includes a shearing component, which is used to shear the cable wire whose coating thickness exceeds a preset value.

[0011] Optionally, the processing device includes a repair component, which includes a scraper cylinder, one end of which is provided with a circle of scrapers. When the thickness of the coating of the cable exceeds the standard value of the coating and is lower than a preset value, the cable passes through the scraper cylinder, and the scraper is used to scrape off the excessively thick part of the coating.

[0012] Optionally, the scraper drum is rotatably arranged, and a collecting groove for collecting waste coating layer is arranged on the outer peripheral wall of the scraper drum close to the scraper blade.

[0013] Optionally, the repair component further comprises a second extruder, and the second extruder is used for secondary extrusion of the coating layer with bubbles in it and the coating layer that has passed through the filling component.

[0014] In a second aspect, the present application provides a method for preparing a high temperature resistant inorganic insulated signal cable, comprising the following steps: S1. The aperture control component adjusts the aperture of the slide hole according to the diameter of the insulated cable core to be processed, inserts the insulated cable core into the slide hole, makes the surface of the insulated cable core to be processed contact with the inner wall of the slide hole, limits the insulated cable core, and then adjusts the height of the electric telescopic rod so that the height of the slide hole is flush with the height of the extruded tube, and then drives the fixed block to slide on the guide rail so that the slide hole is aligned with the opening of the extruded tube; S2, insert one end of the insulated cable core into the extruded tube, and the extruder wraps the coating material on the outer layer of the insulated cable core to form a cable line. The cable line is first tested for the thickness of the coating layer by an ultrasonic detector, so as to determine whether the insulated cable core is aligned with the extruded tube core and whether there are bubbles in the coating layer; S3. When the thickness of the coating layer of the cable detected by the ultrasonic detector exceeds the standard value of the coating layer but is within the preset value, the cable is passed through the repair component to scrape off the excessively thick coating layer, and then enters the second extruder for hot melt extrusion to repair the excessively thin coating layer; At the same time, the position of the insulated cable core is adjusted by using an adjustment mechanism so that the insulated cable core is located at the center of the extruded tube, so that the coating layer can be evenly wrapped on the insulated cable core; S4, passing the cable wire with bubbles in the coating layer and treated by the repair component into the second extruder, the high temperature in the second extruder can heat the coating layer again, accelerate the gas precipitation from the coating layer, eliminate the bubbles, and at the same time, the second extruder extrudes the cable wire again, fills the depression caused by the bubbles on the coating layer, and fills the thinner parts of the coating layer, and regenerates the cable wire that meets the standards; S5. When the ultrasonic detector detects that the coating thickness exceeds the preset value, the cable line passes through the shearing assembly, which shears the cable line that exceeds the preset coating thickness value. At the same time, according to the measured coating thickness value, the position of the insulating cable core is adjusted through the adjustment mechanism, so that the insulating cable core is aligned with the center of the extruded tube, so that the produced cable line meets the standard.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the insulated cable core is not aligned with the center of the extruded tube during extrusion, such as when the insulated cable core approaches one side of the inner wall of the extruded tube, the coating wrapped around the outside of the insulated cable core will be unevenly wrapped, making the coating on one side of the insulated cable core too thick and the coating on the other side of the insulated cable core too thin, thereby affecting the electrical and mechanical properties of the cable.

[0016] The insulated cable core is placed on the adjustment mechanism, one end of the insulated cable core is inserted into the extruded tube, and the extruder wraps the coating layer on the outside of the insulated cable core to form a cable line. The cable line detects the thickness of the formed coating layer through the detection component. When the thickness values ​​of the coating layers on both sides of the cable line are detected to be different, the detection component transmits the measured thickness values ​​of the multiple sets of coating layers to the control system. The control system controls the adjustment mechanism to adjust the horizontal and vertical positions of the insulated cable core according to the thickness values ​​of the coating layers on different sides (such as the coating layer thickness on the left side exceeds the average value N, and the coating layer thickness on the right side is lower than the average value N), so that the insulated cable core moves to the center of the extruded tube (such as controlling the fixed block to move N to the left on the guide rail), thereby making the coating layer evenly wrapped around the insulated cable core, ensuring that the distance from the outer surface of the coating layer to the insulated cable core is equal, and improving the manufacturing quality of the cable line. The control system also issues instructions to the adjustment mechanism to adjust the insulated cable core to the center of the extruded tube.

[0017] On the other hand, when the thickness of the coating on the cable exceeds the coating error range, the processing device is used to process the coating with uneven thickness.

[0018] Secondly, the ultrasonic detector can also detect bubbles in the coating layer, and the processing device can repair the coating layer containing bubbles to ensure the manufacturing quality and service life of the cable.

[0019] 2. The control system can control the extension and retraction of the electric telescopic rod and the moving direction and distance of the fixed block on the guide rail, thereby realizing the adjustment of the insulated cable core in the vertical and horizontal directions, and the ultrasonic detector can detect the thickness value of the coating layer and compare it with the standard thickness value of the coating layer. The side that exceeds the standard thickness value will control the insulated cable core to move to the side of the excess value, thereby moving the insulated cable core to the center of the extruded tube.

[0020] 3. When the ultrasonic detector detects that the coating thickness exceeds the standard error range of the coating and is lower than the preset value, the cable is passed through the scraper. When the cable moves in the scraper, the scraper cuts off the side of the coating that is too thick, so that the distance between the coating on this side and the insulated cable core meets the standard range of the coating. At the same time, the cable is passed through the second extruder, which hot-melts the coating on the cable and performs secondary extrusion to improve the adhesion of the new coating to the original coating, and fills the side of the coating that is too thin, thereby forming a cable that meets the standard. The coating within the preset value can be processed for the second time because the thickness error of the coating is not large, thereby reducing the waste of raw materials; 4. When the ultrasonic detector detects bubbles in the coating, the cable is passed through the second extruder. The high temperature in the second extruder can heat the coating again, which can accelerate the gas precipitation from the coating and eliminate the bubbles. At the same time, the second extruder extrudes the cable again to fill the depression on the coating caused by the bubbles. The bubbles will cause the high temperature resistance and insulation performance of the cable to weaken. The second extruder can optimize the processing of the defective cable and improve the production quality of the cable. 5. When the ultrasonic detector detects that the coating thickness exceeds the preset value, the cable passes through the shearing assembly, which cuts the cable that exceeds the preset coating thickness. Since the coating thickness exceeds the preset value, it indicates that the coating thickness on one side is too thin, and the distance between the insulating cable core and the outer skin of the coating is too small, and even one side of the insulating cable core may be exposed outside the coating, and further processing cannot make the new coating and the original coating bond better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a preparation device for a high temperature resistant inorganic insulated signal cable according to an embodiment of the present application; Figure 2 is a partially enlarged schematic diagram of the aperture control assembly of the embodiment of the present application; Figure 3 It is a partially enlarged schematic diagram of the repair component of the embodiment of the present application.

[0022] Explanation of the reference numerals in the accompanying drawings: 1. Adjusting mechanism; 11. Electric telescopic rod; 12. Fixed frame; 13. Guide rail; 14. Fixed block; 15. Slide hole; 2. Extrusion equipment; 21. Extruder; 22. Extrusion tube; 3. Detection assembly; 31. Ultrasonic detector; 4. Aperture control assembly; 41. Limiting ring; 42. Sliding groove; 43. Rotating shaft; 44. Sliding wheel; 5. Driving assembly; 51. Sleeve; 52. Driving member; 53. Threaded shaft; 54. Positioning block; 6. Shearing assembly; 61. Fixed bracket; 62. Shearing ring; 7. Repair assembly; 71. Scraper; 72. Scraper; 73. Collecting tank; 74. Second extruder. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.

[0024] On the one hand, the present application provides a preparation device for a high temperature resistant inorganic insulated signal cable, referring to Figure 1, including an extrusion adjustment mechanism 1, a molding device 2, a detection component 3 and a processing device. The extrusion device 2 includes an extruder 21. The head of the extruder 21 is equipped with an extrusion tube 22. When the insulated cable core passes through the extrusion tube 22, the extruder 21 wraps the coating material on the insulated cable core to form a cable line. The adjustment mechanism 1 is arranged on one side of the extruder 21. The adjustment mechanism 1 is used to adjust the position of the insulated cable core in the extrusion tube 22 so that the insulated cable core is located at the center of the extrusion tube 22, so that the coating can be evenly wrapped on the insulated cable core. The detection component 3 includes an ultrasonic detector 31, which is used to detect the coating thickness of multiple groups of points on the circumferential wall of the cable produced from the extrusion tube 22. The control system controls the adjustment mechanism 1 to make corresponding adjustments to the position of the insulated cable core according to the detection results of the ultrasonic detector 31. The processing device is used to perform corresponding processing on the cable line whose coating thickness exceeds the standard value.

[0025] Reference Figure 1 The adjusting mechanism 1 includes an electric telescopic rod 11, a fixed frame 12 is provided at the output end of the electric telescopic rod 11, a guide rail 13 is connected between the fixed frames 12, a fixed block 14 is slidably provided on the guide rail 13, and a sliding hole 15 is opened on the fixed block 14 for the insulated cable core to pass through.

[0026] The insulated cable core is inserted into the slide hole 15, and the electric telescopic rod 11 can be extended or shortened to adjust the vertical height of the insulated cable core so that the height of the insulated cable core is flush with the center height of the extruded tube 22, and then the fixed block 14 is slid on the guide rail 13, so that the horizontal position of the insulated cable core can be adjusted so that the insulated cable core can be accurately aligned with the center of the extruded tube 22.

[0027] The end of the insulated cable core passes through the extrusion tube 22, and the extruder 21 wraps the coating layer on the insulated cable core to form a cable line. The cable line then passes through the ultrasonic detector 31. The ultrasonic detector 31 can detect the thickness of the coating layer at multiple groups of points, and then determine whether the thickness of the coating layer is uniform. If the coating thickness on one side exceeds the standard value of the coating thickness, the coating thickness on the opposite side will be lower than the standard value of the coating thickness. The control system receives the detection data of the ultrasonic detector 31, and the adjustment mechanism 1 moves the fixed block 14 toward the side with thicker coating thickness, and the movement value is the same as the value exceeding the coating thickness.

[0028] Reference Figure 2The fixed block 14 is provided with an aperture control component 4, which can adjust the aperture size of the sliding hole 15 and is used to limit the insulated cable cores of different diameters. The aperture control component 4 includes a limit ring 41 rotatably arranged in the inner cavity of the fixed block 14, the inner ring diameter of the limit ring 41 is the same as the diameter of the sliding hole 15, and a plurality of evenly distributed sliding grooves 42 are provided on the outer peripheral wall of the limit ring 41. A plurality of rotating shafts 43 inserted into the corresponding sliding grooves 42 are rotatably arranged on the inner cavity wall of the fixed block 14, one end of the rotating shaft 43 inserted into the sliding groove 42 extends into the sliding hole 15 and is rotatably connected to a sliding wheel 44, and a driving component 5 for driving the plurality of rotating shafts 43 to rotate synchronously is also provided in the inner cavity of the fixed block 14.

[0029] When the driving component 5 drives the rotating shaft 43 to rotate, it can simultaneously drive several sliding wheels 44 to approach or move away from the center of the sliding hole 15. When the sliding wheels 44 move toward the center of the sliding hole 15, several sliding wheels 44 fit with the outer wall of the insulated cable core in the sliding hole 15, limit the insulated cable core, reduce the movement of the insulated cable core in the through hole, and cause the insulated cable core to deviate in the extruded tube 22, thereby improving the uniformity of the coating layer wrapped around the insulated cable core.

[0030] At the same time, when the insulated cable core moves, it will drive the sliding wheel 44 to rotate, reducing the friction between the sliding wheel 44 and the insulated cable core, thereby facilitating the movement of the insulated cable core.

[0031] Reference Figure 2 The driving assembly 5 includes a plurality of sleeves 51 rotatably arranged between the two side walls of each sliding groove 42, the sleeves 51 are sleeved on the corresponding rotating shaft 43, a driving member 52 is rotatably arranged on the inner cavity wall of the fixed block 14, the output end of the driving member 52 is connected to the threaded shaft 53, and a positioning block 54 threadedly connected to the threaded shaft 53 is fixedly connected to the outer wall of the limit ring 41.

[0032] When the driving member 52 drives the threaded shaft 53 to rotate, the positioning block 54 moves on the threaded shaft 53, and the driving member 52 deflects accordingly according to the rotation direction of the positioning block 54. When the positioning block 54 moves on the threaded shaft 53, it drives the limit ring 41 to rotate together. When the limit ring 41 rotates, it drives the sleeve 51 to move and rotate. The sleeve 51 drives the rotating shaft 43 to rotate, so that the sliding wheel 44 approaches or moves away from the center of the sliding hole 15, which is convenient for limiting the insulated cable cores of different diameters.

[0033] The aperture control component 4 can allow insulated cable cores of different sizes to pass through the slide hole 15 and limit them, thereby increasing the adaptability of the device. At the same time, a number of pulleys are evenly distributed on the peripheral wall of the insulated cable core and limit the insulated cable core, thereby reducing the movement of the insulated cable core in the slide hole 15 and improving the alignment accuracy between the insulated cable core and the center of the extruded tube 22, thereby allowing the coating layer to be evenly wrapped around the insulated cable core.

[0034] Reference Figure 1 The processing device includes a shearing assembly 6, which includes a fixed bracket 61, and a shearing ring 62 is arranged on the fixed bracket 61. The cable passes through the shearing ring 62. When the ultrasonic detector 31 detects that the thickness of the cable coating exceeds the preset value, the shearing ring 62 shears the cable, and the adjustment mechanism 1 adjusts the corresponding position of the insulated cable core according to the detection result of the ultrasonic detector 31. The preset value range exceeds the standard value of the coating. When the thickness of the coating exceeds the preset value, it indicates that the distance between the coating on one side and the outer skin of the insulated cable core is too small, and even one side of the insulated cable core may be exposed outside the coating, and further processing cannot make the new coating better bonded with the original coating.

[0035] Refer to Figures 1 and Figure 3 The processing device also includes a repair component 7, which includes a rotatable scraper 71, a scraper 72 is arranged at one end of the scraper 71 facing the extruder 21, and a collection groove 73 is arranged on the outer peripheral wall of the scraper 71. When the coating thickness of the cable exceeds the standard value of the coating and is lower than the preset value, the cable is guided into the scraper 71, and the scraper 72 can cut off the excessively thick part of the coating, and the scraped waste falls into the collection groove 73, which is convenient for centralized treatment of the waste. The rotation of the scraper 71 is convenient for the scraper 72 to cut the coating on the one hand, and it is convenient to evenly distribute the waste in the collection groove 73 on the other hand, so as to reduce the waste overflow caused by excessive waste at a single position in the collection groove 73.

[0036] Reference Figure 1 The repair component 7 also includes a second extruder 74. The cable wire treated by the scraper 72 is passed into the second extruder 74. The second extruder 74 first melts the original coating material on the cable wire and extrude a new coating material. The new coating material is bonded to the original coating material, and the thinner side of the coating is filled, thereby forming a cable wire that meets the standard. Through the repair component 7, the cable wire whose coating thickness is between the standard value and the preset value can be processed twice, reducing the waste of raw materials.

[0037] The ultrasonic detector 31 can also detect the presence of bubbles or hollows in the coating layer. Bubbles can weaken the high temperature resistance and insulation performance of the cable, reducing the product quality. The cable with bubbles or hollows is directly passed into the second extruder 74. The high temperature in the second extruder 74 can heat the coating layer again, which can accelerate the precipitation of gas from the coating layer, eliminate bubbles, and melt the original coating layer. The second extruder 74 extrudes the cable again to fill the depression and hollows caused by bubbles on the original coating layer, thereby ensuring the high temperature resistance and insulation performance of the cable and improving the production quality of the cable.

[0038] On the other hand, the present application also provides a method for preparing a high temperature resistant inorganic insulated signal cable, comprising the following steps: S1, the aperture control component 4 adjusts the aperture of the slide hole 15 according to the diameter of the insulated cable core to be processed, inserts the insulated cable core into the slide hole 15, makes the surface of the insulated cable core to be processed contact with the inner wall of the slide hole 15, limits the insulated cable core, and then adjusts the height of the electric telescopic rod 11 so that the height of the slide hole 15 is flush with the height of the extruded tube 22, and then drives the fixed block 14 to slide on the guide rail 13 so that the slide hole 15 is aligned with the opening of the extruded tube 22; S2, insert one end of the insulating cable core into the extrusion tube 22, and the extruder 21 wraps the coating material on the outer layer of the insulating cable core to form a cable line. The cable line is first tested for the thickness of the coating layer by an ultrasonic detector 31, so as to determine whether the insulating cable core is aligned with the center of the extrusion tube 22 and whether there are bubbles in the coating layer; S3, when the ultrasonic detector 31 detects that the coating thickness of the cable exceeds the standard value of the coating but is within the preset value, the cable is passed through the repair component 7 to scrape off the excessively thick coating portion, and then enters the second extruder 74 for hot melt extrusion to repair the excessively thin coating portion; At the same time, the position of the insulating cable core is adjusted using the adjustment mechanism 1 so that the insulating cable core is located at the center of the extruded tube 22 so that the coating layer can be evenly wrapped on the insulating cable core; S4, passing the cable wire with bubbles in the coating layer and treated by the repair component 7 into the second extruder 74, the high temperature in the second extruder 74 can heat the coating layer again, accelerate the gas precipitation from the coating layer, eliminate the bubbles, and at the same time, the second extruder 74 extrudes the cable wire again, fills the depression caused by the bubbles on the coating layer, and fills the thinner parts of the coating layer, and regenerates the cable wire that meets the standards; S5. When the ultrasonic detector 31 detects that the coating thickness exceeds the preset value, the cable line passes through the shearing component 6, and the shearing component 6 shears the cable line that exceeds the preset coating thickness value. At the same time, according to the measured coating thickness value, the position of the insulating cable core is adjusted through the adjustment mechanism 1, so that the insulating cable core is aligned with the center of the extruded tube 22, so that the produced cable line meets the standard.

[0039] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A preparation device for high temperature resistant inorganic insulated signal cable, characterized in that: include: An extrusion device (2), the extrusion device (2) comprising an extruder (21), the extruder (21) being provided with an extrusion tube (22), the insulated cable core passing through the extrusion tube (22), the extruder (21) wrapping a coating material around the insulated cable core to form a cable wire; A detection component (3), the detection component (3) being used to detect the thickness of a cable coating; An adjustment mechanism (1), the adjustment mechanism being used to adjust the position of the insulated cable core in the extruded tube (22) so that the insulated cable core is located at the center of the extruded tube (22); A processing device is used to perform corresponding processing on cables whose coating thickness does not meet the standards.

2. The preparation equipment of a high temperature resistant inorganic insulated signal cable according to claim 1, characterized in that: The detection component (3) comprises an ultrasonic detector (31), which can measure the thickness of the coating layer at multiple groups of relative points on the outer peripheral wall of the cable, and send instructions to the adjustment mechanism (1) through the control system to adjust the insulated cable core to the center of the extruded tube (22).

3. According to the equipment for preparing a high temperature resistant inorganic insulated signal cable as described in claim 2, the ultrasonic detector (31) can also detect bubbles or hollows in the cable coating.

4. The preparation equipment of a high temperature resistant inorganic insulated signal cable according to claim 2, characterized in that: The adjustment mechanism (1) comprises an electric telescopic rod (11), a fixed frame (12) being provided at the output end of the electric telescopic rod (11), a guide rail (13) being provided between the fixed frames (12), a fixed block (14) being slidably provided on the guide rail (13), and a sliding hole (15) for the insulating cable core to pass through being provided in the fixed block (14).

5. The preparation equipment of a high temperature resistant inorganic insulated signal cable according to claim 3, characterized in that: An aperture control component (4) is arranged in the fixed block (14), and the aperture control component (4) can adjust the aperture size of the sliding hole (15) and is used to limit the position of insulated cable cores of different diameters.

6. The preparation equipment of a high temperature resistant inorganic insulated signal cable according to claim 2, characterized in that: The processing device comprises a shearing component (6), and the shearing component (6) is used to shear a cable whose coating thickness exceeds a set value.

7. The preparation equipment of a high temperature resistant inorganic insulated signal cable according to claim 2, characterized in that: The processing device comprises a repair component (7), the repair component (7) comprises a scraper cylinder (71), one end of the scraper cylinder (71) is provided with a circle of scrapers (72), when the coating thickness of the cable exceeds a standard value of the coating and is lower than a preset value, the cable passes through the scraper cylinder (71), and the scraper (72) is used to scrape off the excessively thick portion of the coating.

8. The preparation equipment of a high temperature resistant inorganic insulated signal cable according to claim 7, characterized in that: The scraper drum (71) is rotatably arranged, and a collecting groove (73) for collecting coating layer waste is arranged on an outer peripheral wall of one side of the scraper drum (71).

9. The preparation equipment of a high temperature resistant inorganic insulated signal cable according to claim 4, characterized in that: The repair component (7) further comprises a second extruder (74), wherein the second extruder (74) is used to perform secondary extrusion on the cable wire having bubbles in the coating layer and having passed through the repair component (7).

10. A method for preparing a high temperature resistant inorganic insulated signal cable, using the preparation device for a high temperature resistant inorganic insulated signal cable as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, the aperture control component (4) adjusts the aperture of the slide hole (15) according to the diameter of the insulated cable core to be processed, inserts the insulated cable core into the slide hole (15) so that the surface of the insulated cable core to be processed contacts the inner wall of the slide hole (15), limits the position of the insulated cable core, and then adjusts the height of the electric telescopic rod (11) so that the height of the slide hole (15) is flush with the height of the extruded tube (22), and then drives the fixed block (14) to slide on the guide rail (13) so that the slide hole (15) is aligned with the opening of the extruded tube (22); S2, inserting one end of the insulating cable core into the extrusion tube (22), and the extruder (21) wraps the coating material on the outer layer of the insulating cable core to form a cable line, and the cable line is first tested for the thickness of the coating layer by an ultrasonic detector (31), so as to determine whether the insulating cable core is aligned with the center of the extrusion tube (22) and whether there are bubbles in the coating layer; S3, when the ultrasonic detector (31) detects that the coating thickness of the cable exceeds the standard value of the coating but is within the preset value, the cable is passed through a repair component (7) to scrape off the excessively thick coating portion, and then enters a second extruder (74) for hot melt extrusion to repair the excessively thin coating portion; At the same time, the position of the insulating cable core is adjusted using the adjustment mechanism (1) so that the insulating cable core is located at the center of the extruded tube (22) so that the coating layer can be evenly wrapped around the insulating cable core; S4, passing the cable wire with bubbles in the coating layer and treated by the repair component (7) into the second extruder (74), the high temperature in the second extruder (74) can heat the coating layer again, accelerate the precipitation of gas from the coating layer, eliminate the bubbles, and at the same time, the second extruder (74) extrude the cable wire again to fill the depressions on the coating layer caused by the bubbles and fill the thinner parts of the coating layer, thereby regenerating a cable wire that meets the standards; S5. When the ultrasonic detector (31) detects that the coating thickness exceeds the preset value, the cable line passes through the shearing assembly (6), and the shearing assembly (6) shears the cable line that exceeds the preset coating thickness value. At the same time, according to the measured coating thickness value, the position of the insulating cable core is adjusted through the adjustment mechanism (1) so that the insulating cable core is aligned with the center of the extruded tube (22), so that the produced cable line meets the standard.

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