A preparation device and preparation method of high temperature resistant inorganic insulation signal cable

Abstract

The present application relates to a preparation device and process for a high-temperature resistant inorganic insulated signal cable, and relates to the field of chemical production technology, which includes an extrusion device, a detection component, an adjustment mechanism, and a processing device. The extrusion device includes an extruder, an extrusion tube is installed on the extruder, 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; the detection component is used to detect the thickness of the cable line coating; the adjustment mechanism is used to adjust the position of the insulated cable core in the extrusion tube so that the insulated cable core is located at the center of the extrusion tube; the processing device is used to perform corresponding processing on the cable line whose coating thickness does not meet the standard. The present application has the effect of improving the uniform distribution of the coating on the insulated cable core and improving the high-temperature resistance and insulation performance of the cable.

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] Operating cables at loads exceeding their rated capacity for extended periods can cause the cable insulation to exceed its maximum allowable temperature, leading to aging and drying of the insulation, potentially causing fires. Consequently, my country is experiencing increasing demand for high-temperature-resistant, inorganically insulated signal cables. High-temperature insulated cables offer excellent fire resistance and fire resistance. They incorporate a fire-resistant, expanding coating layer into their structural design. Under fire, this coating expands, making the cable insulation more stable and enabling continued power supply in fires near the melting point of copper.

[0003] During the extrusion process of the coating, the cable is placed into the extruded tube for extrusion of the coating, and finally a cable with the same thickness as the inner wall of the extruded tube is formed. When the alignment of the cable and the center hole of the extruder is deviated, the cable is not at the center of the extruded tube when entering the extruded 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 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 device for preparing a high-temperature resistant inorganic insulated signal cable, which adopts the following technical solution:

[0006] A preparation device for a high-temperature resistant inorganic insulated signal cable, comprising:

[0007] An extrusion device, the extrusion device comprising an extruder, the extruder being equipped with an extrusion tube, the insulated cable core passing through the extrusion tube, and the extruder wrapping a coating material around the insulated cable core to form a cable line;

[0008] A detection component, wherein the detection component is used to detect the thickness of the cable coating;

[0009] An adjusting mechanism, the adjusting mechanism being 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;

[0010] A processing device is used to perform corresponding processing on cables whose coating thickness does not meet the standards.

[0011] 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.

[0012] Optionally, the ultrasonic detector can also detect bubbles or hollows in the cable sheath.

[0013] 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 provided in the fixed block for the insulated cable core to pass through.

[0014] 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.

[0015] Optionally, the processing device includes a shearing component, which is used to shear the cable whose coating thickness exceeds a preset value.

[0016] Optionally, the processing device includes a repair component, which includes a scraper. A circle of scrapers is provided at one end of the scraper. 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, and the scraper is used to scrape off the excessively thick part of the coating.

[0017] Optionally, the scraper drum is rotatably arranged, and a collection groove for collecting coating waste is provided on the outer peripheral wall of the scraper drum close to the scraper blade.

[0018] Optionally, the repair component further comprises a second extruder, which is used for secondary extrusion of the covering layer with bubbles in it and the covering layer that has passed through the filling component.

[0019] In a second aspect, the present application provides a method for preparing a high-temperature resistant inorganic insulated signal cable, comprising the following steps:

[0020] S1. The aperture control assembly 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 so that the surface of the insulated cable core to be processed contacts the inner wall of the slide hole, limits the position of the insulated cable core, 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;

[0021] S2. Insert one end of the insulated cable core into an extruded tube. The extruder wraps the coating material around the outer layer of the insulated cable core to form a cable. The cable is first tested by an ultrasonic detector to determine the thickness of the coating layer. This can determine whether the insulated cable core is aligned with the extruded tube core and whether there are bubbles in the coating layer.

[0022] S3. When the thickness of the cable coating detected by the ultrasonic detector exceeds the standard value but is within the preset value, the cable is passed through the repair component to scrape off the excessively thick portion of the coating, and then enters the second extruder for hot melt extrusion to repair the excessively thin portion of the coating;

[0023] At the same time, the position of the insulated cable core is adjusted 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 around the insulated cable core;

[0024] S4. The cable with bubbles in the coating and that has been treated with the repair component is passed through a second extruder. The high temperature in the second extruder can reheat the coating, accelerate the release of gas from the coating, and eliminate the bubbles. At the same time, the second extruder re-extrudes the cable to fill the depressions on the coating caused by the bubbles and the thinner areas of the coating, thereby regenerating a cable that meets the standards.

[0025] S5. 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. At the same time, according to the measured coating thickness value, the position of the insulated cable core is adjusted through the adjustment mechanism, so that the insulated cable core is aligned with the center of the extruded tube, so that the produced cable meets the standard.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 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.

[0028] An insulated cable core is placed on an adjustment mechanism. One end of the core is inserted into an extruded tube. The extruder wraps a sheath around the core to form a cable. The cable passes through a detection component to detect the thickness of the sheath. If the sheath thickness on either side of the cable is different, the detection component transmits the measured sheath thickness values ​​to a control system. Based on the sheath thickness values ​​on each side (e.g., if the left sheath thickness exceeds an average value N, while the right sheath thickness falls below an average value N), the control system controls the adjustment mechanism to adjust the horizontal and vertical positions of the core, moving it to the center of the extruded tube (e.g., by controlling a fixed block to move N to the left on a guide rail). This ensures that the sheath is evenly wrapped around the core, ensuring an equal distance between the outer surface of the sheath and the core, thereby improving cable quality. The control system then issues a command to the adjustment mechanism to adjust the core to the center of the extruded tube.

[0029] 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.

[0030] 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.

[0031] 2. The control system can control the extension and contraction amount 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. The ultrasonic detector can detect the thickness value of the coating layer and compare it with the standard thickness value of the coating layer. If the value on which side exceeds the standard thickness value, the insulated cable core will be controlled to move to the side of the excess value, thereby moving the insulated cable core to the center of the extruded tube.

[0032] 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 a 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 a second extruder, which heat-melts the coating on the cable and performs secondary extrusion to improve the adhesion of the new coating to the original coating and fill 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 secondary processing because the thickness error of the coating is not large, thereby reducing raw material waste;

[0033] 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 reheat the coating, which can accelerate the precipitation of gas from the coating and eliminate the bubbles. At the same time, the second extruder re-extrudes the cable to fill the depressions on the coating caused by the bubbles. Bubbles will cause the high-temperature resistance and insulation performance of the cable to be weakened. The second extruder can optimize the processing of defective cables, thereby improving the production quality of the cables.

[0034] 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, 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 better bonded to the original coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of a device for preparing a high-temperature resistant inorganic insulated signal cable according to an embodiment of the present application;

[0036] Figure 2 is a partially enlarged schematic diagram of the aperture control assembly of an embodiment of the present application;

[0037] Figure 3 It is a partially enlarged schematic diagram of the repair component of the embodiment of the present application.

[0038] Explanation of the accompanying drawings: 1. Adjustment 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

[0039] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.

[0040] 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 layer 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.

[0041] Reference Figure 1 The adjustment 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 provided on the fixed block 14 for the insulated cable core to pass through.

[0042] The insulated cable core is passed through 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. The fixed block 14 is then slid on the guide rail 13 to adjust the horizontal position of the insulated cable core so that the insulated cable core can be accurately aligned with the center height of the extruded tube 22.

[0043] The end of the insulated cable core passes through the extruded 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 layer thickness on one side exceeds the standard value of the coating layer thickness, the coating layer thickness on the opposite side will be lower than the standard value of the coating layer 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 layer thickness, and the movement value is the same as the value exceeding the coating layer thickness.

[0044] Reference Figure 2An aperture control assembly 4 is provided within the fixed block 14. The aperture control assembly 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. The aperture control assembly 4 includes a limit ring 41 rotatably provided within 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. The outer peripheral wall of the limit ring 41 is provided with a plurality of evenly distributed sliding grooves 42. A plurality of rotating shafts 43 are rotatably provided on the inner cavity wall of the fixed block 14 and inserted into the corresponding sliding grooves 42. 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. A driving assembly 5 is also provided within the inner cavity of the fixed block 14 to drive the plurality of rotating shafts 43 to rotate synchronously.

[0045] When the driving component 5 drives the rotating shaft 43 to rotate, it can simultaneously drive several sliding wheels 44 to move closer to or 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, limiting the insulated cable core, reducing the movement of the insulated cable core in the through hole, causing the insulated cable core to be offset in the extruded tube 22, and improving the uniformity of the coating wrapped around the insulated cable core.

[0046] 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.

[0047] Reference Figure 2 The driving assembly 5 includes several 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. A positioning block 54 threadedly connected to the threaded shaft 53 is fixedly connected to the outer wall of the limit ring 41.

[0048] 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 limiting ring 41 to rotate together. When the limiting 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.

[0049] The aperture control component 4 can allow insulated cable cores of different sizes to pass through the sliding 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 sliding hole 15 and improving the alignment accuracy of the insulated cable core and the center of the extruded tube 22, thereby allowing the coating layer to be evenly wrapped on the insulated cable core.

[0050] Reference Figure 1 The processing device includes a shearing assembly 6, which includes a fixed bracket 61. The fixed bracket 61 is provided with a shearing ring 62. 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 causes the adjustment mechanism 1 to adjust 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 one side of the insulated cable core may even be exposed outside the coating. Reprocessing cannot make the new coating better bond with the original coating.

[0051] 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 provided at one end of the scraper 71 facing the extruder 21, and a collection groove 73 is provided on the outer peripheral wall of the scraper 71. When the thickness of the coating layer of the cable exceeds the standard value of the coating layer 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 layer, 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, on the one hand, facilitates the scraper 72 to cut the coating layer, and on the other hand, facilitates the uniform distribution of the waste in the collection groove 73, thereby reducing the situation where waste overflows due to excessive waste at a single location in the collection groove 73.

[0052] Reference Figure 1 Repair assembly 7 also includes a second extruder 74. The cable, after being treated by scraper 72, is passed through second extruder 74. Second extruder 74 melts the original coating material on the cable and extrudes new coating material. The new coating material bonds with the original coating material, filling the thinner coating area to form a cable that meets the standard. Repair assembly 7 allows secondary processing of cables with coating thicknesses between the standard and preset values, reducing material waste.

[0053] The ultrasonic detector 31 can also detect the presence of bubbles or hollows in the coating. Bubbles can weaken the high-temperature resistance and insulation performance of the cable, reducing 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 reheat the coating, accelerating the separation of gas from the coating, eliminating the bubbles, and simultaneously melting the original coating. The second extruder 74 extrudes the cable again, filling the depressions and hollows caused by the bubbles in the original coating, thereby ensuring the high-temperature resistance and insulation performance of the cable and improving the production quality of the cable.

[0054] 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:

[0055] S1. The aperture control assembly 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. Then, the fixed block 14 is driven to slide on the guide rail 13 so that the slide hole 15 is aligned with the opening of the extruded tube 22.

[0056] S2. Insert one end of the insulated cable core into the extruded tube 22. The extruder 21 wraps the coating material around the outer layer of the insulated cable core to form a cable. The cable is first tested by an ultrasonic detector 31 to determine the thickness of the coating layer. This can then determine whether the insulated cable core is aligned with the center of the extruded tube 22 and whether there are bubbles in the coating layer.

[0057] S3: When the ultrasonic detector 31 detects that the coating thickness of the cable exceeds the standard value but is within the preset value, the cable is passed through the repair assembly 7 to scrape off the excessively thick coating, and then enters the second extruder 74 for hot melt extrusion to repair the excessively thin coating.

[0058] At the same time, the position of the insulated cable core is adjusted using the adjustment mechanism 1 so that the insulated cable core is located at the center of the extruded tube 22 so that the coating layer can be evenly wrapped around the insulated cable core;

[0059] S4. The cable with bubbles in the coating and that has been treated by the repair assembly 7 is passed into the second extruder 74. The high temperature in the second extruder 74 reheats the coating, accelerating the release of gas from the coating and eliminating the bubbles. Simultaneously, the second extruder 74 re-extrudes the cable to fill the depressions in the coating caused by the bubbles and the thinner areas of the coating, thereby regenerating a cable that meets the standards.

[0060] S5. When the ultrasonic detector 31 detects that the coating thickness exceeds the preset value, the cable passes through the shearing assembly 6, which cuts the cable that exceeds the preset coating thickness. At the same time, according to the measured coating thickness value, the position of the insulated cable core is adjusted through the adjustment mechanism 1, so that the insulated cable core is aligned with the center of the extruded tube 22, so that the produced cable meets the standard.

[0061] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this 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), an extrusion tube (22) being mounted on the extruder (21), 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 line; a detection component (3), the detection component (3) being used to detect the thickness of the cable line coating layer; an adjustment mechanism (1), the adjustment mechanism being 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); a processing device, the processing device being used to perform corresponding processing on the cable line whose coating layer thickness does not meet the standard; The processing device comprises a shearing assembly (6), and the shearing assembly (6) is used to shear a cable whose coating thickness exceeds a set value; The processing device comprises a repair component (7), the repair component (7) comprises a scraper (71), one end of the scraper (71) is provided with a circle of scrapers (72), when the coating thickness of the cable exceeds the coating standard value and is lower than a preset value, the cable passes through the scraper (71), and the scraper (72) is used to scrape off the excessively thick portion of the coating; The repair component (7) further comprises a second extruder (74), the second extruder (74) being used for performing secondary extrusion on the cable wire having bubbles in the coating layer and having passed through the repair component (7).

2. The preparation equipment for a high temperature resistant inorganic insulated signal cable according to claim 1, characterized in that: The detection assembly (3) includes an ultrasonic detector (31), which can measure the thickness of the coating layer at multiple 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 preparation equipment of a high-temperature resistant inorganic insulated signal cable according to claim 2, the ultrasonic detector (31) can also detect bubbles or hollows in the cable coating.

4. The equipment for preparing 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) is provided at the output end of the electric telescopic rod (11), a guide rail (13) is provided between the fixed frames (12), a fixed block (14) is slidably provided on the guide rail (13), and a sliding hole (15) is provided in the fixed block (14) for the insulating cable core to pass through.

5. The equipment for preparing a high temperature resistant inorganic insulated signal cable according to claim 4, characterized in that: An aperture control component (4) is provided 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 equipment for preparing a high temperature resistant inorganic insulated signal cable according to claim 1, characterized in that: The scraper (71) is rotatably arranged, and a collecting groove (73) for collecting coating layer waste is provided on an outer peripheral wall of one side of the scraper (71).

7. 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 according to any one of claims 1 to 6, 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), 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. One end of the insulated cable core is inserted into the extruded tube (22), and the extruder (21) 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 (31), and then it can be judged whether the insulated cable core is aligned with the center of the extruded tube (22) and whether there are bubbles in the coating layer; S3. When the ultrasonic detector (31) detects that the thickness of the coating of the cable exceeds the standard value of the coating but is between the preset value, the cable is passed through the repair component (7) to scrape off the excessively thick portion of the coating, and then enters the second extruder (74) for hot melt extrusion to repair the excessively thin portion of the coating; at the same time, the adjustment mechanism (1) is used to adjust the position of the insulating cable core so that the insulating cable core is located at the center of the extrusion tube (22) so that the coating can be evenly wrapped around the insulating cable core; S4. The cable with bubbles in the coating and the cable that has been treated by the repair component (7) is passed through the second extruder (74). The high temperature in the second extruder (74) can heat the coating again, accelerate the precipitation of gas from the coating, and eliminate the bubbles. At the same time, the second extruder (74) extrudes the cable again to fill the depressions on the coating caused by the bubbles, and regenerate a cable that meets the standard; S5. When the ultrasonic detector (31) detects that the coating thickness exceeds the preset value, the cable passes through the shearing assembly (6), and the shearing assembly (6) shears the cable that exceeds the preset coating thickness. At the same time, according to the measured coating thickness value, the position of the insulating cable core is adjusted through the adjusting mechanism (1) so that the insulating cable core is aligned with the center of the extruded tube (22), so that the produced cable meets the standard.

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