Heat-resistant insulated cable for industrial power transmission and transformation and preparation method thereof

Abstract

The present invention relates to the field of cable manufacturing technology, and discloses a heat-resistant insulated cable for industrial power transmission and transformation and a method for preparing the same. The cable comprises a cable protective layer wrapped around the outer walls of multiple cable cores, and a cooling guide sleeve sleeved around the outer periphery of the cable protective layer. A guide assembly is provided within the cooling duct for guiding the cable protective layer through the cooling duct. A cooling assembly is also provided between the cooling duct and the insulation duct. The cooling assembly includes a gas cooling cavity sealed between the cooling duct and the insulation duct, and a plurality of evenly distributed annular metal flat tubes that are in contact with the outer walls of the cooling duct. Compared with the prior art, the present application solves a series of problems currently encountered, such as unsatisfactory cooling of the cable itself and inconvenient installation of the cable core.

Description

Technical Field

[0001] The present invention relates to the technical field of cable manufacturing, in particular to a heat-resistant insulated cable for industrial power transmission and transformation and a preparation method thereof. Background Art

[0002] Cables are made of one or more mutually insulated conductors and an outer insulating protective layer. They transmit electricity or information from one location to another. They are usually made up of several or several groups of conductors twisted together into a rope-like cable. Each group of conductors is insulated from each other and often twisted around a central core. The entire cable is covered with a highly insulating covering. Cables are characterized by internal power supply and external insulation. Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single or multiple strands of conductors and an insulating layer, and are used to connect circuits, electrical appliances, etc.

[0003] In the prior art, a Chinese patent document with publication number CN110504059B proposes a heat-resistant and aging-resistant cable insulation layer and a cable thereof, which radiates heat radiation to the outside of the rubber outer sheath through a heat reflecting layer to prevent heat from being transmitted to the inside of the rubber inner sheath. Although this heat dissipation method can partially radiate the heat inside the cable to the protective layer of the cable, it does not take effective heat dissipation measures for the protective layer, resulting in the cable still emitting a large amount of heat in a high-power transmission environment, thereby causing the protective layer wrapped on the outer wall of the cable to become hot, posing a safety hazard to the cable. In addition, when inserting the cables for threading and arranging, due to the lack of a guiding mechanism, the cable core is easily bent and blocked in its outer pipe, thereby affecting the normal wiring of the cable. Therefore, the present application discloses a heat-resistant insulated cable for industrial power transmission and transformation and a preparation method thereof to meet the needs of safe and convenient cable use. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a heat-resistant insulated cable for industrial power transmission and transformation and a preparation method thereof, which has the advantages of fully cooling the cable core, and solves a series of problems in the existing technology such as unsatisfactory cooling effect of the cable itself and inconvenient installation.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a heat-resistant insulated cable for industrial power transmission and transformation, comprising a cable protective layer wrapped around the outer walls of multiple cable cores, and a cooling guide kit sleeved around the outer periphery of the cable protective layer, the cooling guide kit comprising a cooling pipe and an insulation pipe sleeved in sequence outside the cable protective layer, the cooling pipe being made of metal, and provided within the cooling pipe with a guide assembly for guiding the cable protective layer to pass through the cooling pipe, the guide assembly comprising a plurality of guide rollers in contact with the outer walls of the cable protective layer, and a spring for urging the guide rollers to maintain tight contact with the cable protective layer;

[0008] A cooling assembly is also provided between the cooling pipe and the insulation pipe. The cooling assembly includes a gas cooling cavity sealed between the cooling pipe and the insulation pipe, and a plurality of evenly distributed annular metal flat tubes that are in contact with the outer wall of the cooling pipe. Liquid coolant is provided in each of the plurality of annular metal flat tubes.

[0009] Preferably, the cable protective layer is coaxially arranged with the cooling pipe and the insulation pipe, and both ends of the cable protective layer pass through the cooling pipe and extend to one side of the cooling pipe respectively, and both ends of the cooling pipe pass through the insulation pipe and extend to one side of the insulation pipe respectively, and both ends of the insulation pipe are in a closed state.

[0010] Preferably, the guide assembly further comprises a plurality of evenly distributed fixing frames fixedly sleeved on the outer wall of the cooling pipe, a plurality of sliding rods corresponding in position are slidably sleeved on the side walls of the plurality of fixing frames, one end of the plurality of sliding rods at the same relative position extends into the corresponding fixing frame, and the other end of the plurality of sliding rods at the same relative position extends between the cooling pipe and the insulation pipe and is fixedly connected to a telescopic base;

[0011] One end of each of the sliding rods is also fixedly connected to a U-shaped frame, and a positioning shaft is fixedly installed on each of the U-shaped frames. Each of the guide rollers is rotatably sleeved on the corresponding positioning shafts, and each of the guide rollers is waist-shaped and in contact with the outer wall of the cable protective layer.

[0012] Preferably, the plurality of springs are respectively sleeved on the corresponding sliding rods, and two ends of the plurality of springs are respectively fixedly connected to the corresponding fixing frame and the telescopic base.

[0013] Preferably, the guide assembly also includes a plurality of evenly distributed compression airbags, and a plurality of groups of evenly distributed limiting rings are fixedly installed on the inner wall of the insulation pipe. The plurality of compression airbags are respectively arranged in the plurality of limiting rings of the corresponding groups, and the plurality of telescopic bases are provided with arc grooves adapted to the corresponding compression airbags.

[0014] Preferably, the plurality of compression airbags are further fixedly connected to exchange tubes, the top ends of the plurality of exchange tubes pass through the insulation pipe and extend outside the insulation pipe, and the top ends of the plurality of exchange tubes are further fixedly connected to the same intake manifold, one end of which is connected to the output end of an external air pump;

[0015] The air intake manifold is also provided with a corresponding pressure relief pipe and a pressure relief valve.

[0016] Preferably, a filling block is installed on the bottom inner wall of the cooling pipe, the shortest distance between the filling block and the cable protective layer is smaller than the shortest distance between the inner wall of the cooling pipe and the cable protective layer, and a plurality of heat dissipation holes are provided on the filling block.

[0017] Preferably, the cooling assembly further comprises an air inlet end and a coolant connecting pipe, one end of which is respectively connected to an external fan and a coolant supply end, wherein the air inlet end is provided at one end of the heat-insulating pipe and is connected to the interior of the heat-insulating pipe;

[0018] Multiple fixed angles connected to the corresponding annular metal flat tubes are fixedly installed on the multiple annular metal flat tubes, and the multiple fixed angles are in contact with the inner wall of the insulation pipe, and the coolant connecting pipe is connected to the multiple fixed angles at the same relative position, and one end of the coolant connecting pipe extends to the outside of one end of the insulation pipe.

[0019] Preferably, both ends of the cooling pipe are sleeved with sealing covers with matching ends, and the two sealing covers are fixedly connected to the sides away from each other with pull rings for removing the sealing covers.

[0020] A method for preparing a heat-resistant insulated cable for industrial power transmission and transformation, which is used to manufacture the above-mentioned heat-resistant insulated cable for industrial power transmission and transformation, comprises the following manufacturing steps:

[0021] S1. Wire drawing and stranding: The metal raw materials are drawn to obtain a conductive wire core of the required metal cross-sectional area and size, and multiple conductive wire cores are twisted in a required direction to form a cable core;

[0022] S2, coating: extruding the cable protective layer onto the cable core obtained by S2;

[0023] S3. Assembly: Put the cooling guide kit on the outer periphery of the cable protective layer.

[0024] (3) Beneficial effects

[0025] Compared with the prior art, the present invention provides a heat-resistant insulated cable for industrial power transmission and transformation and a preparation method thereof, which has the following beneficial effects:

[0026] 1. This heat-resistant insulated cable for industrial power transmission and transformation and its preparation method operates through an external air pump, causing it to inflate air into multiple compression airbags through the air intake manifold and the exchange tube, thereby causing the compression airbags to expand and squeeze the telescopic bases at corresponding positions, so that the other ends of the multiple telescopic bases drive the corresponding U-shaped frames close to the outer wall of the cable protective layer, thereby causing the multiple guide rollers to compress and roll the cable protective layer, stably pulling the cable protective layer in the cooling duct, thereby improving the stability of the cable during assembly and improving the overall cable preparation efficiency.

[0027] 2. The heat-resistant insulated cable for industrial power transmission and transformation and its preparation method inputs cold air into the cavity between the cooling pipe and the insulation pipe through the air inlet end, so that the cooling pipe maintains a low temperature, and then the heated gas contacts the inner wall of the cooling pipe and liquefies into water droplets and drips on the outer wall of the cable protective layer to cool it. The liquefied and dripping liquid water collects on the filling block, that is, the inner bottom end of the cooling pipe, and then part of the outer wall of the cable protective layer is immersed in water to maintain the cooling effect on the cable protective layer. Compared with the existing technology, the overall cooling effect of the cable is optimized. In addition, the cooling liquid can be input into the interior of multiple annular metal flat tubes through the cooling liquid connecting pipe and multiple fixed angles, so that the annular metal flat tubes can exchange heat with the cable protective layer, further improving the overall cooling effect of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of a heat-resistant insulated cable for industrial power transmission and transformation according to the present invention;

[0029] Figure 2 This is a schematic diagram of the internal three-dimensional structure of a heat-resistant insulated cable for industrial power transmission and transformation according to the present invention;

[0030] Figure 3 This is a schematic diagram of a cutaway side view of the structure of an insulation pipe of a heat-resistant insulated cable for industrial power transmission and transformation according to the present invention;

[0031] Figure 4 This is a schematic diagram of the cutaway three-dimensional structure of the end portion of the insulation pipe of a heat-resistant insulated cable for industrial power transmission and transformation according to the present invention;

[0032] Figure 5 This is a schematic diagram of the three-dimensional structure of a portion of the guide assembly of a heat-resistant insulated cable for industrial power transmission and transformation according to the present invention;

[0033] Figure 6 This is a schematic diagram of the three-dimensional structure of a compression airbag for a heat-resistant insulated cable for industrial power transmission and transformation according to the present invention;

[0034] Figure 7 The present invention is a schematic diagram of a three-dimensional structure of a heat-insulated pipe of a heat-resistant insulated cable for industrial power transmission and transformation.

[0035] In the figure: 1. Cable protective layer; 2. Cooling pipe; 3. Insulation pipe; 4. Fixed frame; 5. Sliding rod; 6. Telescopic base; 7. U-shaped frame; 8. Guide roller; 9. Spring; 10. Limiting ring; 11. Compression airbag; 12. Arc groove; 13. Exchange pipe; 14. Air intake manifold; 15. Heat dissipation hole; 16. Air intake end; 17. Annular metal flat tube; 18. Fixed angle; 19. Coolant connecting pipe; 20. Sealing cover; 21. Pull ring. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] As introduced in the background technology, there are deficiencies in the existing technology. In order to solve the above technical problems, this application proposes a heat-resistant insulated cable for industrial power transmission and transformation and a preparation method thereof.

[0038] In a typical embodiment of the present application, Figure 1-7As shown, a heat-resistant insulated cable for industrial power transmission and transformation includes a cable protective layer 1 wrapped around the outer walls of multiple cable cores, and a cooling guide kit sleeved on the periphery of the cable protective layer 1, the cooling guide kit including a cooling pipe 2 and a thermal insulation pipe 3 sleeved on the outside of the cable protective layer 1 in sequence, the cooling pipe 2 is made of metal, and a guide component for guiding the cable protective layer 1 to penetrate into the cooling pipe 2 is provided in the cooling pipe 2, the guide component includes a plurality of guide rollers 8 in contact with the outer wall of the cable protective layer 1, and a spring 9 for urging the guide rollers 8 to maintain tight contact with the cable protective layer 1, a cooling component is further provided between the cooling pipe 2 and the thermal insulation pipe 3, the cooling component includes a gas cooling cavity sealed between the cooling pipe 2 and the thermal insulation pipe 3, and a plurality of evenly distributed annular metal flat tubes 17, each of which is in contact with the outer wall of the cooling pipe 2, and a plurality of annular metal flat tubes. 17 is provided with liquid coolant. When the cable is prepared, one end of the prepared cable protective layer 1 is sequentially passed through the two ends of the cooling pipe 2 and extended to the outside of the cooling pipe 2. During the penetration process, according to the cable model, the guide component is controlled to operate so that the multiple guide rollers 8 can maintain close contact with the outer wall of the cable protective layer 1. Then, with the continuous advancement of the cable protective layer 1, under the continuous rotation and guiding action of the multiple guide rollers 8, one end of the cable protective layer 1 is completely passed through the cooling pipe 2, thereby realizing stable traction of the cable in the cooling pipe 2. Compared with the existing technology, it can effectively avoid the cable head displacement and dislocation phenomenon during the cable traction process, thereby improving the installation efficiency of the cable. In addition, through the dual effects of the gas cooling cavity and the coolant in the annular metal flat tube 17, the cable protective layer 1 is cooled synchronously by water cooling and air cooling, thereby improving the overall cooling effect of the cable.

[0039] As a preferred embodiment of the present invention, the cable protective layer 1 is coaxially arranged with the cooling pipe 2 and the insulation pipe 3, and both ends of the cable protective layer 1 pass through the cooling pipe 2 and extend to one side of the cooling pipe 2 respectively, and both ends of the cooling pipe 2 pass through the insulation pipe 3 and extend to one side of the insulation pipe 3 respectively, and both ends of the insulation pipe 3 are in a closed state. The cooling assembly also includes an air inlet end 16 and a cooling liquid connecting pipe 19, one end of which is connected to the external fan and the coolant supply end respectively. The air inlet end 16 is opened on one end of the insulation pipe 3 and is connected to the inside of the insulation pipe 3. The plurality of annular metal flat tubes 17 are fixedly mounted with a plurality of fixed angles 18 connected to the corresponding annular metal flat tubes 17. The plurality of fixed angles 18 are in contact with the inner wall of the insulation pipe 3, and the coolant connecting pipe 19 is connected to the plurality of fixed angles 18 at the same relative position. One end of the coolant connecting pipe 19 extends to the outside of one end of the insulation pipe 3. When assembling the cable, it is only necessary to pass one end of the cable protective layer 1 through the two ends of the cooling pipe 2 in sequence to realize the overall assembly of the cable protective layer 1, the cooling pipe 2 and the insulation pipe 3 to form the final cable. The cable protective layer 1 When the cable core is working, it generates heat, causing the gas around the cable protective layer 1 to heat up. Through the air inlet end 16, cold air is input into the cavity between the cooling pipe 2 and the insulation pipe 3, so that the cooling pipe 2 is kept at a low temperature. Then, the heated gas contacts the inner wall of the cooling pipe 2 and liquefies into water droplets, which drip onto the outer wall of the cable protective layer 1 to cool it. A filling block is installed on the inner wall of the bottom side of the cooling pipe 2. The shortest distance between the filling block and the cable protective layer 1 is less than the shortest distance between the inner wall of the cooling pipe 2 and the cable protective layer 1, and a plurality of heat dissipation holes 15 are opened on the filling block. The liquefied dripping liquid water gathers on the filling block along the inner wall of the cooling pipe 2 or the outer wall of the cable protective layer 1, that is, the inner bottom end of the cooling pipe 2, and then immerses part of the outer wall of the cable protective layer 1 in water, maintaining the cooling effect on the cable protective layer 1. Compared with the existing technology, the overall cooling effect of the cable is optimized. In addition, the coolant can be input into the interior of the multiple annular metal flat tubes 17 through the cooling liquid connecting pipe 19 and multiple fixed angles 18, so that the annular metal flat tubes 17 can exchange heat with the cable protective layer 1, further improving the overall cooling effect of the cable.

[0040] As a preferred implementation in this embodiment, the guide assembly also includes a plurality of evenly distributed fixed frames 4 that are fixedly sleeved on the outer wall of the cooling pipe 2. The side walls of the plurality of fixed frames 4 are slidably sleeved with a plurality of corresponding sliding rods 5. One end of the plurality of sliding rods 5 at the same relative position extends into the corresponding fixed frame 4. The other end of the plurality of sliding rods 5 at the same relative position extends between the cooling pipe 2 and the insulation pipe 3 and is fixedly connected to a telescopic base 6. One end of the plurality of sliding rods 5 is also fixedly connected to a U-shaped frame 7. The plurality of U-frames 7 have The plurality of guide rollers 8 are respectively rotatably sleeved on the corresponding positioning shafts, and the plurality of guide rollers 8 are all waist-shaped and in contact with the outer wall of the cable protective layer 1, and the plurality of springs 9 are respectively sleeved on the corresponding slide rods 5, and the two ends of the plurality of springs 9 are respectively fixedly connected to the corresponding fixed frame 4 and the telescopic base 6. The guide assembly also includes a plurality of evenly distributed compression air bags 11, and a plurality of groups of evenly distributed limit rings 10 are fixedly installed on the inner wall of the insulation pipe 3. The plurality of compression air bags 11 are respectively sleeved on the plurality of limit rings 11 of the corresponding group. 0, and multiple telescopic bases 6 are provided with arc grooves 12 adapted to the corresponding compression airbags 11, and multiple compression airbags 11 are also fixedly connected with exchange tubes 13, and the tops of multiple exchange tubes 13 all pass through the insulation pipe 3 and extend to the outside of the insulation pipe 3, and the tops of multiple exchange tubes 13 are also fixedly connected with the same intake manifold 14, one end of the intake manifold 14 is connected to the output end of the external air pump, and the intake manifold 14 is also provided with a corresponding pressure relief pipe and pressure relief valve. When assembling the cable, insert one end of the cable protective layer 1 into the cooling pipe 2, the external air pump is controlled to operate so that it inflates the multiple compression air bags 11 through the air intake manifold 14 and the exchange tube 13, thereby expanding the compression air bags 11 and squeezing the telescopic bases 6 at the corresponding positions, so that the other ends of the multiple telescopic bases 6 drive the corresponding U-shaped frames 7 to approach the outer wall of the cable protective layer 1, thereby causing the multiple guide rollers 8 to compress and roll the cable protective layer 1, and stably pull the cable protective layer 1 in the cooling pipe 2, thereby improving the stability of the cable during assembly and further improving the overall cable preparation efficiency.

[0041] As a preferred implementation in this embodiment, both ends of the cooling pipe 2 are provided with a sealing cover 20 that is adapted to one end portion, and the two sealing covers 20 are fixedly connected with a pull ring 21 for removing the sealing cover 20 on the side away from each other. By providing the pull ring 21, it is convenient to pull out the sealing cover 20 to remove it and maintain the interior of the cooling pipe 2 and the insulation pipe 3.

[0042] A method for preparing a heat-resistant insulated cable for industrial power transmission and transformation, which is used to manufacture the above-mentioned heat-resistant insulated cable for industrial power transmission and transformation, comprises the following manufacturing steps:

[0043] S1. Wire drawing and stranding: The metal raw materials are drawn to obtain a conductive wire core of the required metal cross-sectional area and size, and multiple conductive wire cores are twisted in a required direction to form a cable core;

[0044] S2, coating: extruding the cable protective layer 1 onto the cable core obtained in S2;

[0045] S3. Assembly: Put the cooling guide kit on the outer periphery of the cable protective layer 1.

[0046] The working principle of the present invention is as follows: when assembling the cable, after one end of the cable protective layer 1 is inserted into the cooling pipe 2, the external air pump is controlled to operate so that it inflates multiple compression air bags 11 through the air intake manifold 14 and the exchange pipe 13, thereby causing the compression air bags 11 to expand and squeeze the telescopic base 6 at the corresponding position, so that the other ends of the multiple telescopic bases 6 drive the corresponding U-shaped frames 7 close to the outer wall of the cable protective layer 1, thereby causing the multiple guide rollers 8 to realize the compression and rolling of the cable protective layer 1, and stably pull the cable protective layer 1 in the cooling pipe 2, thereby improving the stability of the cable during assembly and improving the overall preparation efficiency of the cable.

[0047] When assembling the cable, it is only necessary to pass one end of the cable protective layer 1 through the two ends of the cooling pipe 2 in sequence to realize the overall assembly of the cable protective layer 1, the cooling pipe 2 and the insulation pipe 3 to form the final cable. The cable protective layer 1 generates heat when the cable core is working, so that the gas around the cable protective layer 1 is heated. Through the air inlet end 16, cold air is input into the cavity between the cooling pipe 2 and the insulation pipe 3, so that the cooling pipe 2 is kept at a low temperature, and the heated gas contacts the inner wall of the cooling pipe 2, liquefies into water droplets and drips on the outer wall of the cable protective layer 1 to cool it. The dripping liquid water is collected on the filling block along the inner wall of the cooling pipe 2 or the outer wall of the cable protective layer 1, that is, the inner bottom end of the cooling pipe 2, and then part of the outer wall of the cable protective layer 1 is immersed in water, thereby maintaining the cooling effect on the cable protective layer 1. Compared with the existing technology, the overall cooling effect of the cable is optimized. In addition, the coolant can be input into the interior of the multiple annular metal flat tubes 17 through the cooling liquid connecting pipe 19 and the multiple fixed angles 18, so that the annular metal flat tubes 17 can exchange heat with the cable protective layer 1, further improving the overall cooling effect of the cable.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A heat-resistant insulated cable for industrial power transmission and transformation, characterized by: The invention comprises a cable protective layer (1) wrapped around the outer walls of a plurality of cable cores, and a cooling guide kit sleeved on the outer periphery of the cable protective layer (1), the cooling guide kit comprising a cooling pipe (2) and a heat-insulating pipe (3) sleeved on the outer periphery of the cable protective layer (1) in sequence, the cooling pipe (2) being made of metal, and a guide assembly for guiding the cable protective layer (1) to pass through the cooling pipe (2) is provided in the cooling pipe (2), the guide assembly comprising a plurality of guide rollers (8) in contact with the outer wall of the cable protective layer (1), and a spring (9) for urging the guide rollers (8) to maintain tight contact with the cable protective layer (1); A cooling assembly is further provided between the cooling pipe (2) and the insulation pipe (3), the cooling assembly comprising a gas cooling cavity formed by sealing between the cooling pipe (2) and the insulation pipe (3), and a plurality of evenly distributed annular metal flat tubes (17) that are in contact with the outer wall of the cooling pipe (2), a plurality of the annular metal flat tubes (17) are provided with liquid coolant, the cable protective layer (1) and the cooling pipe (2) and the insulation pipe (3) are all coaxially arranged, and both ends of the cable protective layer (1) pass through the cooling pipe (2) and extend to one side of the cooling pipe (2), respectively. The cooling pipe ( 2) both ends pass through the insulation pipe (3) and extend to the outside of one side of the insulation pipe (3), and both ends of the insulation pipe (3) are in a closed state, the guide assembly further comprises a plurality of fixed frames (4) evenly distributed and fixedly sleeved on the outer wall of the cooling pipe (2), a plurality of sliding rods (5) are slidably sleeved on the side walls of the plurality of fixed frames (4), one end of the plurality of sliding rods (5) at the same relative position extends into the corresponding fixed frame (4), and the other end of the plurality of sliding rods (5) at the same relative position extends between the cooling pipe (2) and the insulation pipe (3) and is fixedly connected to a telescopic base (6); One end of each of the plurality of slide rods (5) is also fixedly connected to a U-shaped frame (7), and a positioning shaft is fixedly installed on each of the plurality of U-shaped frames (7). The plurality of guide rollers (8) are rotatably sleeved on the corresponding positioning shafts, and the plurality of guide rollers (8) are all waist-shaped and in contact with the outer wall of the cable protective layer (1). The plurality of springs (9) are respectively sleeved on the corresponding slide rods (5), and the two ends of the plurality of springs (9) are respectively fixedly connected to the corresponding fixed frame (4) and the telescopic base (6). The guide assembly also includes a plurality of uniformly distributed compression airbags (11). A plurality of groups of uniformly distributed limiting rings (10) are fixedly installed on the inner wall of the insulation pipe (3). The plurality of compression airbags (11) are respectively sleeved in the plurality of limiting rings (10) of the corresponding group, and the plurality of telescopic bases (6) are provided with arc grooves (12) adapted to the corresponding compression airbags (11).

2. The heat-resistant insulated cable for industrial power transmission and transformation according to claim 1, characterized in that: The plurality of compression air bags (11) are also fixedly connected to exchange tubes (13), the top ends of the plurality of exchange tubes (13) pass through the insulation pipe (3) and extend outside the insulation pipe (3), and the top ends of the plurality of exchange tubes (13) are also fixedly connected to the same intake manifold (14), one end of the intake manifold (14) is connected to the output end of an external air pump; The intake manifold (14) is also provided with a corresponding pressure relief pipe and a pressure relief valve.

3. The heat-resistant insulated cable for industrial power transmission and transformation according to claim 1, characterized in that: A filling block is installed on the bottom inner wall of the cooling pipe (2), the shortest distance between the filling block and the cable protective layer (1) is smaller than the shortest distance between the inner wall of the cooling pipe (2) and the cable protective layer (1), and a plurality of heat dissipation holes (15) are provided on the filling block.

4. The heat-resistant insulated cable for industrial power transmission and transformation according to claim 1, characterized in that: The cooling assembly further includes an air inlet end (16) and a coolant connecting pipe (19), one end of which is respectively connected to an external fan and a coolant supply end, wherein the air inlet end (16) is provided on one end of the heat-insulating pipe (3) and is connected to the interior of the heat-insulating pipe (3); A plurality of fixed angles (18) connected to the corresponding annular metal flat tubes (17) are fixedly mounted on each of the plurality of annular metal flat tubes (17); the plurality of fixed angles (18) are in contact with the inner wall of the insulation pipe (3); and the cooling liquid connecting pipe (19) is connected to the plurality of fixed angles (18) at the same relative position; one end of the cooling liquid connecting pipe (19) extends to the outside of one end of the insulation pipe (3).

5. The heat-resistant insulated cable for industrial power transmission and transformation according to claim 1, characterized in that: Both ends of the cooling pipe (2) are sleeved with sealing covers (20) with matching ends, and the two sealing covers (20) are fixedly connected to a pull ring (21) for removing the sealing covers (20) on the sides away from each other.

6. A method for preparing a heat-resistant insulated cable for industrial power transmission and transformation, for manufacturing a heat-resistant insulated cable for industrial power transmission and transformation according to any one of claims 1 to 5, characterized in that: The manufacturing steps include: S1. Wire drawing and stranding: The metal raw materials are drawn to obtain a conductive wire core of the required metal cross-sectional area and size, and multiple conductive wire cores are twisted in a required direction to form a cable core; S2, coating: extruding the cable protective layer (1) onto the cable core obtained by S2; S3. Assembly: Place the cooling guide kit on the outer periphery of the cable protective layer (1).

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