Cold-resistant 35kv power cable and manufacturing system thereof

Abstract

This invention discloses a cold-resistant 35kV power cable and its manufacturing system, relating to the field of cable technology. A self-adjusting cold-resistant component is installed on the outer side of the inner core. A deformable rubber tube is installed between the three inner cores. A thermally conductive film is uniformly embedded in the center of the fitting groove. A thermally conductive sheet is welded inside the support end near the outer side of the inner core. A heat-insulating sheet is welded inside the triangular bracket near the inner core. One end of a compression spring is connected to the inside of the triangular bracket near the inner core. An ice-removing protection component is installed on the outer side of the protective insulation layer. When the outside temperature is low, the heat inside the cable is transferred to the cold-resistant layer and the protective insulation layer through the inner insulation layer and the fixed thermally conductive strip. As the temperature outside the inner insulation layer decreases, the deformable rubber tube shrinks, reducing its thermal conductivity. This reduces the impact of low temperatures on the inner insulation layer and the inner core, preventing adverse effects of low temperatures on the inner insulation layer and the inner core, and better protecting the cable's internal structure.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a cold-resistant 35kV power cable and its manufacturing system. Background Technology

[0002] Wires and cables are wire products used to transmit electrical energy, information, and realize electromagnetic energy conversion. Cold-resistant cables are special cables designed for low-temperature environments. They can maintain their flexibility, electrical performance, and mechanical strength under severe cold conditions, avoiding the hardening, embrittlement, and cracking of ordinary cables due to low temperatures, thereby ensuring the safety and stability of power or signal transmission.

[0003] However, the cold-resistant power cables currently on the market have thick insulation layers to ensure cold resistance, resulting in poor heat dissipation. When the outside temperature rises from winter to summer, the poor heat dissipation can lead to excessive internal heat accumulation, which can even cause the internal insulation layer to soften and crack, or even cause a fire. Summary of the Invention

[0004] This invention provides a cold-resistant 35kV power cable and its manufacturing system, which can effectively solve the problem mentioned in the background art that, in order to ensure cold resistance, the insulation layer of the cold-resistant power cable is thick and the heat dissipation effect is poor. However, when the outside temperature rises from winter to summer, the poor heat dissipation will cause excessive internal heat accumulation, which may even cause the internal insulation layer to soften and crack or even cause a fire.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cold-resistant 35kV power cable and its manufacturing system, comprising an inner core, wherein a self-adjusting cold-resistant component is disposed on the outer side of the inner core, and the self-adjusting cold-resistant component comprises an inner insulation layer; The outer side of the inner core is wrapped with an inner insulating layer, and a deformable rubber tube is arranged between the three inner cores. A fitting groove is provided on the outer side of the deformable rubber tube corresponding to the inner core, and a thermally conductive film is uniformly embedded in the center of the fitting groove. Three triangular supports are evenly distributed on the outer side of the three inner cores. Each of the triangular supports has a support end near the inner core. A heat-conducting plate is welded inside the support end near the outer side of the inner core. A heat-insulating plate is welded on the inner side of the triangular support near the inner core. One end of a compression spring is connected to the inner side of the triangular support near the inner core. A gasket is welded to the other end of the compression spring. A fixed heat-conducting strip is provided on the outer side of the support end. A first movable strip is provided on one side between adjacent fixed heat-conducting strips, and a second movable strip is provided on the other side between adjacent fixed heat-conducting strips. An interlocking strip is glued to the opposite ends of the first and second movable strips. An inflatable bladder is uniformly glued between the first and second movable strips.

[0006] According to the above technical solution, a heat-conducting wire is embedded on the outer side of the inner insulating layer, and the heat-conducting wire is spiral-shaped.

[0007] According to the above technical solution, a medium reinforcing rope is provided in the middle of the deformable rubber tube, and a support frame is uniformly sleeved inside the deformable rubber tube. A support plate is welded to the end of the support frame, and a rubber sealing film is adhered to one side of the support frame. The edge of the rubber sealing film is attached to the inner wall of the deformable rubber tube.

[0008] According to the above technical solution, a support filling block is provided on the outer side of the three inner cores between the triangular brackets. The triangular bracket is composed of a support end and an insulating plate. The gasket is attached to the outer side of the inner insulation layer. An insulating film is adhered to the outer side of the inner insulation layer near the supporting filler block.

[0009] According to the above technical solution, the end face of the assembly of the first movable strip, the second movable strip and the fixed heat-conducting strip is circular, and the inner wall of the first movable strip and the second movable strip is attached to the outer side of the airbag.

[0010] According to the above technical solution, the fixed heat-conducting strip, the first movable strip, and the second movable strip are wrapped with a cold-resistant layer, and the cold-resistant layer is wrapped with a protective insulating layer.

[0011] According to the above technical solution, a de-icing protection component is provided on the outside of the protective insulation layer, and the de-icing protection component includes a polyurethane protective layer; A polyurethane protective layer is sleeved on the outside of the protective insulation layer. C-shaped retaining rings are symmetrically sleeved on the outside of the polyurethane protective layer. Needle rods are uniformly welded on the inside of the C-shaped retaining rings. A heat-conducting copper sleeve is sleeved on the outside of the needle rods. An annular airbag is sleeved on the outside of the C-shaped retaining rings. A heat-absorbing film is adhered to the outside of the annular airbag. Wire ends are uniformly fixed on the outside of the heat-absorbing film. Two opposite wire ends are distributed and connected to both ends of the steel wire rope. The polyurethane protective layer is symmetrically fitted with movable retaining rings between the C-shaped retaining rings on the outside. A sliding inner ring is fixedly installed on the inner side of the movable retaining ring, and a sliding groove is opened on the inner side of the sliding inner ring corresponding to the steel wire rope.

[0012] According to the above technical solution, a sealing strip is symmetrically bonded to the inner side of the C-shaped retaining ring, and a sealing groove is provided in the polyurethane protective layer at the sealing strip.

[0013] According to the above technical solution, an extended edge is uniformly welded to the outer side of the movable retaining ring, and a heat-absorbing sheet is bonded to the outer side of the movable retaining ring between the extended edges.

[0014] According to the above technical solution, a cold-resistant 35kV power cable manufacturing system includes a cold-resistant 35kV power cable manufacturing system, equipment and method.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Equipped with self-adjusting cold-resistant components, the triangular bracket and support end support the inside of the cable's internal deformation rubber tube, the triangular bracket and support filling block support the outside of the deformation rubber tube, and multiple central support stress structures to prevent damage to the inner core and inner insulation layer due to heavy pressure during cable transportation and handling. In addition, the presence of the first movable strip, the second movable strip and the interlocking strip also allows the cable to be buffered when subjected to impact, providing better protection. When the outside temperature is low, the heat inside the cable is transferred to the cold-resistant layer and the protective insulation layer through the inner insulation layer and the fixed heat-conducting strip. It is then transferred through the support end and the heat-conducting plate. The support end and the heat-conducting plate are made of aluminum alloy, which has high thermal conductivity. This causes the temperature on the outside of the inner insulation layer to drop. The heat-conducting wire and the heat-conducting film improve the heat transfer efficiency. The temperature inside the deformation rubber tube also drops, causing the deformation rubber tube to shrink. Under the pushing action of the compression spring, it drives the inner core in the fitting groove to move towards the center of the cable. The inner insulation layer moves away from the heat-conducting plate. The support end and the heat-conducting plate no longer directly transfer heat to the inner insulation layer. It also reduces the heat transferred through the support filler block. More heat is conducted through the air, which has poor thermal conductivity. This reduces the impact of the low temperature on the inner insulation layer and the inner core, prevents the adverse effects of low temperature on the inner insulation layer and the inner core, and better protects the inside of the cable. Similarly, when the external temperature rises, the internal air temperature inside the deformable rubber tube also increases due to the heat dissipation during the operation of the inner core. The bulging deformable rubber tube pushes the inner insulation layer closer to the heat-conducting plate. By increasing the contact area, the heat is transferred to the cold-resistant layer and the protective insulation layer and then dissipated. This avoids the cable's internal temperature from becoming too high when the external temperature rises, thus improving the safety of the cable during use.

[0016] 2. When there is snow or ice on the outside of the cable and the sun is shining, the heat-absorbing film will absorb the heat from the sunlight, causing the gas inside the annular airbag to expand due to the increased temperature. The outer diameter of the annular airbag increases, and the angle between the wire rope and the outside of the cable changes. The wire rope pushes the movable retainer to make a slight movement, loosening the snow and the outer ice layer. At the same time, the wire rope will cut the snow and the outer ice layer, further accelerating the breaking of the snow and ice layer. The heat-absorbing film and heat-absorbing sheet will absorb heat, heating the wire rope, melting the snow and ice, and accelerating the disintegration of the snow and ice layer. Thus, it automatically de-ices on sunny days, avoiding the situation where the cable breaks due to excessive weight caused by the accumulation of snow and ice in cold areas, and thus improving the cable safety. In summary, when the self-regulating cold-resistant component causes the deformable rubber tube to shrink due to low external temperatures, the C-shaped retainer is in direct contact with the outside environment. The C-shaped retainer has a low temperature and is connected to the inside of the cable via a needle-like rod and a heat-conducting copper sleeve. This accelerates the transfer of heat from the cable's interior to the outside, thus accelerating the shrinkage of the deformable rubber tube. Similarly, when the inner core is energized and heats up, causing the cable's internal temperature to rise, this method also accelerates heat dissipation to the outside, lowering the internal temperature and preventing overheating. Simultaneously, it accelerates the disintegration of ice and snow on the outside of the cable. The two components work together to provide better protection against cable overheating. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] In the attached diagram: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the cross-section of the present invention; Figure 3 This is a schematic diagram of the structure of the self-adjusting cold-resistant component of the present invention; Figure 4 This is a schematic diagram of the installation structure of the heat-conducting wire of the present invention; Figure 5 This is a schematic diagram of the installation structure of the compression spring of the present invention; Figure 6 This is a schematic diagram of the structure of the de-icing protection component of the present invention; Figure 7 This is a schematic diagram of the installation structure of the sealing strip of the present invention; Figure 8 This is the present invention. Figure 7 A schematic diagram of the structure of region A; Labels in the diagram: 1. Inner core; 2. Self-adjusting cold-resistant components; 201. Inner insulation layer; 202. Heat-conducting wire; 203. Deformable rubber tube; 204. Fitting groove; 205. Heat-conducting film; 206. Medium reinforcing rope; 207. Support frame; 208. Support plate; 209. Rubber sealing film; 210. Triangular bracket; 211. Support end; 212. Heat-conducting sheet; 213. Heat insulation sheet; 214. Compression spring; 215. Gasket; 216. Support filling block; 217. Fixed heat-conducting strip; 218. First movable strip; 219. Second movable strip; 220. Interlocking strip; 221. Inflatable bladder; 222. Cold-resistant layer; 223. Protective insulation layer; 224. Isolation film; 3. De-icing protection components; 301. Polyurethane protective layer; 302. C-type retaining ring; 303. Needle rod; 304. Thermally conductive copper sleeve; 305. Annular airbag; 306. Heat-absorbing film; 307. Wire end; 308. Steel wire rope; 309. Movable retaining ring; 310. Sliding inner ring; 311. Sliding groove; 312. Sealing strip; 313. Sealing groove; 314. Extended edge; 315. Heat-absorbing sheet. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example: Figure 1-8 As shown, the present invention provides a cold-resistant 35kV power cable and its manufacturing system technical solution, including an inner core 1, and a self-adjusting cold-resistant component 2 disposed on the outer side of the inner core 1. The self-adjusting cold-resistant component 2 includes an inner insulation layer 201, a heat-conducting wire 202, a deformable rubber tube 203, a fitting groove 204, a heat-conducting film 205, a medium reinforcing rope 206, a support frame 207, a support plate 208, a rubber sealing film 209, a triangular bracket 210, a support end 211, a heat-conducting sheet 212, a heat-insulating sheet 213, a compression spring 214, a gasket 215, a support filling block 216, a fixed heat-conducting strip 217, a first movable strip 218, a second movable strip 219, a fitting strip 220, an air bladder 221, a cold-resistant layer 222, a protective insulation layer 223, and an isolation film 224. The inner core 1 is wrapped with an inner insulation layer 201. A heat-conducting wire 202 is embedded on the outside of the inner insulation layer 201. The heat-conducting wire 202 is spiral-shaped to improve the heat conduction effect of the inner insulation layer 201. A deformable rubber tube 203 is arranged between the three inner cores 1. A fitting groove 204 is provided on the outside of the deformable rubber tube 203 corresponding to the inner core 1. A heat-conducting film 205 is uniformly embedded in the middle of the fitting groove 204. A medium reinforcing rope 206 is provided in the middle of the deformable rubber tube 203. The medium reinforcing rope 206 is evenly sleeved inside the deformable rubber tube 203 with a support frame 207. A support plate 208 is welded to the end of the support frame 207. A rubber sealing film 209 is adhered to one side of the support frame 207. The edge of the rubber sealing film 209 is attached to the inner wall of the deformable rubber tube 203, so that the deformable rubber tube 203 is divided into sections of closed space. Three triangular supports 210 are evenly distributed on the outer side of the three inner cores 1. Each end of the triangular support 210 near the inner core 1 is provided with a support end 211. A heat-conducting plate 212 is welded inside the support end 211 near the outer side of the inner core 1. A heat-insulating plate 213 is welded on the inner side of the triangular support 210 near the inner core 1. One end of a compression spring 214 is connected to the inner side of the triangular support 210 near the inner core 1. A gasket 215 is welded to the other end of the compression spring 214. Supporting filler blocks 216 are provided on the outer side of the three inner cores 1 between the triangular brackets 210. The triangular brackets 210 are composed of supporting ends 211 and insulating plates. Gaskets 215 are attached to the outer side of the inner insulation layer 201. An isolation film 224 is bonded to the outer side of the inner insulation layer 201 near the supporting filler blocks 216 to improve the internal support effect of the cable and facilitate the separation of the inner insulation layer 201 and the supporting filler blocks 216. A fixed heat-conducting strip 217 is provided on the outer side of the support end 211. A first movable strip 218 is provided on one side between adjacent fixed heat-conducting strips 217, and a second movable strip 219 is provided on the other side between adjacent fixed heat-conducting strips 217. An interlocking strip 220 is glued to the opposite ends of the first movable strip 218 and the second movable strip 219. An inflatable bladder 221 is evenly glued between the first movable strip 218 and the second movable strip 219.

[0021] The end face of the assembly of the first movable strip 218, the second movable strip 219 and the fixed heat-conducting strip 217 is circular. The inner walls of the first movable strip 218 and the second movable strip 219 are attached to the outer side of the air bladder 221 to facilitate support of the inside of the cable. The outer sides of the fixed heat-conducting strip 217, the first movable strip 218 and the second movable strip 219 are wrapped with a cold-resistant layer 222, and the outer side of the cold-resistant layer 222 is wrapped with a protective insulation layer 223.

[0022] A de-icing protection component 3 is provided on the outside of the protective insulation layer 223. The de-icing protection component 3 includes a polyurethane protective layer 301, a C-shaped retaining ring 302, a needle-punched rod 303, a heat-conducting copper sleeve 304, an annular airbag 305, a heat-absorbing film 306, a wire end 307, a steel wire rope 308, a movable retaining ring 309, a sliding inner ring 310, a sliding groove 311, a sealing strip 312, a sealing groove 313, an extension edge 314, and a heat-absorbing sheet 315. A polyurethane protective layer 301 is sleeved on the outside of the protective insulation layer 223. A C-shaped retaining ring 302 is symmetrically sleeved on the outside of the polyurethane protective layer 301. A needle-punched rod 303 is uniformly welded on the inside of the C-shaped retaining ring 302. A heat-conducting copper sleeve 304 is sleeved on the outside of the needle-punched rod 303. An annular airbag 305 is sleeved on the outside of the C-shaped retaining ring 302. A heat-absorbing film 306 is adhered to the outside of the annular airbag 305. Wire ends 307 are uniformly fixed on the outside of the heat-absorbing film 306. Two opposite wire ends 307 are distributed and connected to both ends of the steel wire rope 308. A movable retaining ring 309 is symmetrically sleeved on the outer side of the polyurethane protective layer 301 between the C-shaped retaining rings 302. A sliding inner ring 310 is fixedly installed on the inner side of the movable retaining ring 309. A sliding groove 311 is opened on the inner side of the sliding inner ring 310 corresponding to the steel wire rope 308. A sealing strip 312 is symmetrically bonded to the inner side of the C-shaped retaining ring 302. A sealing groove 313 is opened on the polyurethane protective layer 301 at the sealing strip 312 to prevent water from entering the gap between the C-shaped retaining ring 302 and the polyurethane protective layer 301. An extended edge 314 is uniformly welded to the outer side of the movable retaining ring 309. A heat-absorbing sheet 315 is bonded to the outer side of the movable retaining ring 309 between the extended edges 314. The heat-absorbing film 306 is a black titanium heat-absorbing film layer. The heat-absorbing sheet 315 is made of the same material as the heat-absorbing film 306.

[0023] According to the above technical solution, a cold-resistant 35kV power cable manufacturing system includes a cold-resistant 35kV power cable manufacturing system, equipment and method.

[0024] The working principle and usage process of this invention: Triangular brackets 210 are sequentially and equidistantly sleeved on the outer side of the reinforcing rope 206. Next, a deformable rubber tube 203 is wrapped around the outer side of the triangular bracket 210. The inner core 1 is bonded in the fitting groove 204 on the outer side of the deformable rubber tube 203. A thermally conductive film 205 is bonded to the inner insulating layer 201. The thermally conductive film 205 is made of thermally conductive silicone. Next, triangular brackets 210 are equidistantly sleeved on the outer side of the above-mentioned assembly. The triangular bracket 210 is composed of a metal support end 211 and an insulating plate to prevent short circuit when the inner insulating layer 201 is damaged. The metal support end 211 provides excellent thermal conductivity while ensuring the support effect. An isolation film 224 is covered on the outer side of the inner insulating layer 201. The isolation film 224 is a polytetrafluoroethylene film. Subsequently, a support filler block 216 is filled in the gap between the triangular brackets 210 by an extruder. A heat-conducting strip 217 is attached and fixed at the support end 211 of the triangular bracket 210 of the above-mentioned assembly. The heat-conducting strip 217 is made of heat-conducting rubber. Then, in the gap between adjacent heat-conducting strips 217, the first movable strip 218 and the second movable strip 219 are filled with an air bladder 221. The first movable strip 218 and the second movable strip 219 are then embedded into the space between the heat-conducting strips 217 by a fitting strip 220. The first movable strip 218 and the second movable strip 219 are made of the same material as the heat-conducting strip 217. The air bladder 221 is filled with carbon dioxide. Finally, a cold-resistant layer 222 and a protective insulation layer 223 are wrapped in sequence by an extruder. The cold-resistant layer 222 is made of silicone rubber, and the protective insulation layer 223 is a cross-linked polyethylene insulation layer, which ensures the cold resistance effect while reducing costs. During cable laying, if the temperature of the laying section is lower than other areas or if snow or ice easily accumulates, a polyurethane protective layer 301 is fitted onto the outside of that section of cable. A sealing groove 313 is then created on the outside of the polyurethane protective layer 301, followed by the installation of a C-shaped retaining ring 302. When the sealing strip 312 is embedded into the sealing groove 313, the needle-piercing rod 303 will pierce the polyurethane protective layer 301, the cold-resistant layer 222, and the protective insulation layer 223. Due to the limited length of the needle-piercing rod 303, it will not penetrate the inner insulation layer 201 protected within the triangular bracket 210, thus securing the C-shaped retaining ring. Next, a ring-shaped airbag 305 is glued to the outside of the circumferential ... When there is snow or ice on the outside of the cable and the sun is shining, the heat-absorbing film 306 absorbs the heat from the sunlight, causing the gas inside the annular airbag 305 to expand due to the increased temperature. The outer diameter of the annular airbag 305 increases, and the angle between the wire rope 308 and the outside of the cable changes. The wire rope 308 pushes the movable retaining ring 309 to make a slight movement, loosening the snow and the outer ice layer. At the same time, the wire rope 308 cuts the snow and the outer ice layer, further accelerating the breaking of the snow and ice layer. The heat-absorbing film 306 and the heat-absorbing sheet 315 both absorb heat, heating the wire rope 308, melting the snow and ice, and accelerating the disintegration of the snow and ice layer. This allows for automatic de-icing on sunny days, avoiding the situation where the cable breaks due to excessive weight caused by snow and ice in cold regions, thus improving cable safety. The triangular bracket 210 and the support end 211 support the inside of the deformable rubber tube 203 inside the cable, and the triangular bracket 210 and the support filling block 216 support the outside of the deformable rubber tube 203. The multiple support structures in the center prevent damage to the inner core 1 and the inner insulation layer 201 due to heavy pressure during cable transportation and handling. In addition, the presence of the first movable strip 218, the second movable strip 219 and the interlocking strip 220 also allows the cable to be buffered when it is subjected to impact, providing better protection. When the outside temperature is low, the heat inside the cable is transferred to the cold-resistant layer 222 and the protective insulation layer 223 through the inner insulation layer 201 and the fixed heat-conducting strip 217, and then through the support end 211 and the heat-conducting plate 212. The support end 211 and the heat-conducting plate 212 are both made of aluminum alloy, which has high thermal conductivity, resulting in a lower temperature on the outside of the inner insulation layer 201. The heat-conducting wire 202 and the heat-conducting film 205 improve the heat transfer efficiency, and the temperature inside the deformation rubber tube 203 also decreases. The deformation rubber tube 203 will shrink, and under the pushing action of the compression spring 214, it will drive the inner core 1 in the fitting groove 204 toward the center of the cable. With the relocation of the inner insulation layer 201, the heat-conducting plate 212 is moved away from the inner insulation layer 201. The support end 211 and the heat-conducting plate 212 no longer directly transfer heat to the inner insulation layer 201, and the heat transferred through the support filling block 216 is also reduced. Similarly, the air bladder 221 will also become smaller, and the first movable strip 218 and the second movable strip 219 will shrink inward, reducing the contact area with the cold-resistant layer 222 and the triangular bracket 210. More heat is conducted through the air, and the thermal conductivity becomes worse. This reduces the impact of the low temperature on the inner insulation layer 201 and the inner core 1, prevents the adverse effects of low temperature on the inner insulation layer 201 and the inner core 1, and better protects the inside of the cable. Similarly, when the external temperature rises, the internal air temperature of the deformable rubber tube 203 will increase and expand due to the combined effect of heat dissipation during the operation of the inner core 1. The bulging deformable rubber tube 203 will push the inner insulation layer 201 closer to the heat-conducting plate 212. The first movable strip 218 and the second movable strip 219 will be squeezed closer to the cold-resistant layer 222 and the triangular bracket 210 by the bulging air bladder 221. By increasing the contact area, the heat will be transferred to the cold-resistant layer 222 and the protective insulation layer 223 and then dissipated, thereby avoiding the situation that the internal temperature of the cable is too high when the external temperature rises, and improving the safety of the cable during use.

[0025] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cold-resistant 35kV power cable, comprising an inner core (1), characterized in that: The inner core (1) is provided with a self-adjusting cold-resistant component (2) on the outside, and the self-adjusting cold-resistant component (2) includes an inner insulation layer (201). The inner core (1) is wrapped with an inner insulating layer (201) on the outside. A deformable rubber tube (203) is provided between the three inner cores (1). A fitting groove (204) is provided on the outside of the deformable rubber tube (203) corresponding to the inner core (1). A thermally conductive film (205) is uniformly embedded in the middle of the fitting groove (204). Three inner cores (1) are evenly distributed with triangular brackets (210) on their outer sides. Each of the triangular brackets (210) is provided with a support end (211) near the end of the inner core (1). A heat-conducting plate (212) is welded inside the support end (211) near the outer side of the inner core (1). A heat-insulating plate (213) is welded to the inner side of the triangular bracket (210) near the inner core (1). One end of a compression spring (214) is connected to the inner side of the triangular bracket (210) near the inner core (1). A gasket (215) is welded to the other end of the compression spring (214). A fixed heat-conducting strip (217) is provided on the outer side of the support end (211). A first movable strip (218) is provided on one side between adjacent fixed heat-conducting strips (217), and a second movable strip (219) is provided on the other side between adjacent fixed heat-conducting strips (217). An interlocking strip (220) is glued to the opposite ends of the first movable strip (218) and the second movable strip (219). An inflatable bladder (221) is uniformly glued between the first movable strip (218) and the second movable strip (219).

2. The cold-resistant 35kV power cable according to claim 1, characterized in that, The inner insulating layer (201) is inlaid with a heat-conducting wire (202) on the outside, and the heat-conducting wire (202) is spiral.

3. The cold-resistant 35kV power cable according to claim 1, characterized in that, A medium reinforcing rope (206) is provided in the middle of the deformable rubber tube (203). The medium reinforcing rope (206) is uniformly sleeved inside the deformable rubber tube (203) with a support frame (207). A support plate (208) is welded to the end of the support frame (207). A rubber sealing film (209) is adhered to one side of the support frame (207). The edge of the rubber sealing film (209) is attached to the inner wall of the deformable rubber tube (203).

4. The cold-resistant 35kV power cable according to claim 1, characterized in that, Supporting filler blocks (216) are provided on the outer side of the three inner cores (1) between the triangular brackets (210). The triangular brackets (210) are composed of a support end (211) and an insulating plate. The gasket (215) is attached to the outer side of the inner insulating layer (201). An isolation membrane (224) is adhered to the outer side of the inner insulation layer (201) near the support filler block (216).

5. A cold-resistant 35kV power cable according to claim 1, characterized in that, The end face of the assembly of the first movable strip (218), the second movable strip (219) and the fixed heat-conducting strip (217) is circular, and the inner wall of the first movable strip (218) and the second movable strip (219) is attached to the outer side of the inflatable bag (221).

6. A cold-resistant 35kV power cable according to claim 1, characterized in that, The fixed heat-conducting strip (217), the first movable strip (218), and the second movable strip (219) are wrapped with a cold-resistant layer (222), and the cold-resistant layer (222) is wrapped with a protective insulating layer (223).

7. A cold-resistant 35kV power cable according to claim 6, characterized in that, The protective insulation layer (223) is provided with an ice-removing protection component (3) on the outside, the ice-removing protection component (3) including a polyurethane protective layer (301). A polyurethane protective layer (301) is sleeved on the outside of the protective insulation layer (223). A C-shaped retaining ring (302) is symmetrically sleeved on the outside of the polyurethane protective layer (301). A needle rod (303) is uniformly welded on the inside of the C-shaped retaining ring (302). A heat-conducting copper sleeve (304) is sleeved on the outside of the needle rod (303). An annular airbag (305) is sleeved on the outside of the C-shaped retaining ring (302). A heat-absorbing film (306) is bonded to the outside of the annular airbag (305). A wire end (307) is uniformly fixed on the outside of the heat-absorbing film (306). Two opposite wire ends (307) are distributed and connected to both ends of the steel wire rope (308). The polyurethane protective layer (301) is symmetrically fitted with movable retaining rings (309) between C-shaped retaining rings (302) on the outside. A sliding inner ring (310) is fixedly installed on the inner side of the movable retaining ring (309). A sliding groove (311) is opened on the inner side of the sliding inner ring (310) corresponding to the steel wire rope (308).

8. A cold-resistant 35kV power cable according to claim 7, characterized in that, The C-shaped retaining ring (302) has a sealing strip (312) symmetrically bonded to its inner side, and the polyurethane protective layer (301) has a sealing groove (313) at the sealing strip (312).

9. A cold-resistant 35kV power cable according to claim 7, characterized in that, The movable retaining ring (309) has an extended edge (314) uniformly welded on its outer side, and a heat-absorbing sheet (315) is bonded to the outer side of the movable retaining ring (309) between the extended edges (314).

10. A cold-resistant 35kV power cable manufacturing system, characterized in that, The invention comprises the system, equipment and method for manufacturing a cold-resistant 35kV power cable as described in any one of claims 1-9.

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