A high tensile cross-linked polyethylene multi-core cable and cable support

Abstract

This invention relates to the field of cable technology and discloses a high-tensile-strength cross-linked polyethylene multi-core cable and cable support. When subjected to external pulling force, the cable body overcomes the maximum static friction within the cavity to achieve slow and controllable sliding. The deformation of the helical section and the friction force jointly buffer the tensile force, preventing stress from directly acting on the internal cores, thus preventing core breakage and insulation damage, and extending cable life. When rewinding the cable, only the extension rod on the lead rod needs to be removed to release the fixation; the entire tensile shell does not need to be disassembled. After rewinding, the extension rod can be reinstalled to restore use, simplifying assembly and maintenance processes and reducing labor and time costs. This structural design effectively prevents the cable from rapidly breaking or even rupturing when subjected to sudden external pulling force.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a high tensile cross-linked polyethylene multicore cable and cable support. Background Technology

[0002] In the field of cable technology, especially in the design of high-tensile multi-core cables, effectively coping with mechanical stresses such as tension and bending under complex wiring environments while ensuring the stability of signal transmission or power delivery remains a persistent problem. Cross-linked polyethylene (XLPE) is widely used as cable insulation material due to its excellent electrical properties, heat resistance, and mechanical strength. (See patent publication number CN119092199B - Chinese Invention Patent: A High-Efficiency Heat Dissipation Type XLPE Insulated Cable). However, in the aforementioned patent, when the cable encounters sudden external force, the stress often concentrates in a localized area, lacking an effective stress dispersion structure or function, which may lead to rapid cable damage or even breakage. There is an urgent need for a new high-tensile cable structure capable of achieving dynamic stress dispersion and buffering under complex mechanical stress conditions. Summary of the Invention

[0003] The main objective of this invention is to provide a high-tensile-strength cross-linked polyethylene multicore cable to solve the problem that in existing technologies, when cables are subjected to sudden external force, stress tends to concentrate in a localized area, lacking an effective stress dispersion mechanism, which leads to rapid cable damage or even breakage.

[0004] To achieve the above objectives, the present invention provides a high tensile cross-linked polyethylene multicore cable, comprising multiple cores, a filler layer, a flexible layer, and an outer insulation layer. Each core is wrapped with an inner insulation layer, and multiple inner insulation layers are circumferentially embedded in the filler layer. The filler layer, flexible layer, and outer insulation layer are sequentially arranged from the inside to the outside, and multiple tensile shells are evenly distributed along the length of the outer insulation layer.

[0005] Each tensile shell includes a disk, a horizontal tube, and a pull rod;

[0006] An inclined hole is made in the disc, and the inlet end of the inclined hole is located at the axis of one side wall of the disc;

[0007] One end of the guide rod and one end of the horizontal tube are coaxially connected to the other side of the disk and are sleeved inside the horizontal tube. The space between the inner cavity of the horizontal tube and the guide rod forms an annular receiving cavity. The outlet end of the inclined hole is located at an eccentric position on one side wall of the disk and is connected to the annular receiving cavity.

[0008] The other end of the guide rod is coaxially and detachably connected to the extension rod;

[0009] Multiple first springs are fixed circumferentially on each extension rod, and each first spring is arranged radially along the horizontal tube, with a pressing block fixed at its free end;

[0010] The outer insulating layer passes through the inclined hole and the annular receiving cavity in sequence and exits the tensile shell. It is spirally coiled inside the annular receiving cavity. The pressing block abuts against the outer insulating layer through the first spring, so that the outer insulating layer abuts against the inner wall of the horizontal tube.

[0011] Preferably, each tensile shell also includes a guide tube, one end of which is coaxially connected to the side wall of the disk away from the horizontal tube and communicates with the oblique hole.

[0012] Preferably, each tensile shell includes two detachable, symmetrically interlocking shells and multiple bolts;

[0013] Each shell includes a half-disc body, a first half-tube body, a half-rod body, and a second half-tube body;

[0014] The two half-disc bodies, the two first half-tube bodies, the two half-rod bodies, and the two second half-tube bodies are interlocked one by one to form a disc, a horizontal tube, a guide rod, and a guide tube in sequence;

[0015] The two symmetrically interlocking housings allow the outer insulation layer to be secured within the angled holes;

[0016] Ear plates are fixed at both ends of the half-disc body, the first half-tube body, and the second half-tube body.

[0017] Multiple bolts are threaded through two lugs on a disc, horizontal tube, or guide tube and screwed into nuts.

[0018] Preferably, a first external thread is formed on the circumference of one end of the extension rod;

[0019] A threaded hole is opened coaxially at the end of the guide rod away from the disk, and the threaded hole is screwed into the first external thread;

[0020] Each pressing block has a beveled end facing the disk, and the bevel can abut against the outer insulation layer.

[0021] Preferably, the high tensile cross-linked polyethylene multi-core cable comprises multiple cable segments;

[0022] Two adjacent cable segments are electrically connected by a heat dissipation assembly, which is located inside an annular cavity.

[0023] The heat dissipation assembly includes a support ring and multiple annular clamps arranged circumferentially inside the support ring. The number of annular clamps is the same as the number of wire cores in a single cable segment, and the two correspond one-to-one.

[0024] Individual conductors on the two cable segments are electrically connected via ring clamps;

[0025] Electrical tape is wrapped around the joint of two adjacent cable segments. The wrapping of electrical tape forms a heat dissipation elliptical cavity, and the support ring is located inside the heat dissipation elliptical cavity.

[0026] Preferably, the heat dissipation assembly also includes a main frame;

[0027] Each ring clamp includes a straight tube and a metal receiving tube;

[0028] Multiple straight pipes are circumferentially fixed on the main frame;

[0029] Each straight pipe has an annular inclined surface on the inner circumference of one end, and a second external thread on the outer circumference;

[0030] The pipe section includes a left pipe section, a tapered section, a right pipe section, and a straight ring.

[0031] The tapered end is coaxially connected to one end of the left pipe section, and the flared end is coaxially connected to the outer ring of the straight ring. The inner ring of the straight ring is fixedly connected to the outer wall of the right pipe section.

[0032] The left pipe section and the tapered section can be inserted into the straight pipe, and the outer wall of the tapered section is in contact with the annular inclined surface;

[0033] Multiple straight grooves are opened around the circumference of the pipe section. The multiple straight grooves pass through the right pipe section, the straight ring and the tapered section in sequence. Multiple straight blind grooves are opened around one end of the left pipe section. The multiple straight blind grooves correspond one-to-one with the multiple straight grooves and the two are connected.

[0034] The inner wall of one end of the support ring is coaxially fixed with an inner ring, and the inner wall circumference is threaded.

[0035] The internal thread is screwed into multiple second external threads, so that the inner ring abuts against the straight ring, and the cores of the two cable segments are respectively clamped and inserted into the two ends of the right pipe segment;

[0036] One end of the support ring is coaxially connected to the extension tube, and the outer diameter of the support ring is larger than the diameter of the outer insulation layer.

[0037] Preferably, each right pipe segment includes multiple circumferentially arranged arc plates, the arc plates including a left arc plate, a right arc plate and a support frame;

[0038] Multiple teeth are provided at one end of the left arc plate and one end of the right arc plate along their arc direction, and the two sets of teeth are staggered and inserted into contact. The left arc plate is fixedly connected to the inner wall of the straight ring. One end of the support frame is fixedly connected to the inner wall of the left arc plate, and the other end is fixed with a plastic tube. The end of the plastic tube away from the support frame is fixedly connected to the inner wall of the right arc plate.

[0039] The support frame includes an inner rod, a transverse plate, and a limiting cylinder;

[0040] The two ends of the inner rod are fixedly connected to one end of the transverse plate and the inner wall of the left arc plate, respectively. The other end of the transverse plate is fixedly fitted with a limiting cylinder. A second spring is fixedly installed on the inner bottom wall of the limiting cylinder. One end of the second spring passes through the opening of the limiting cylinder and the inner cavity of the plastic tube along the axial direction of the limiting cylinder and is fixedly connected to the right arc plate.

[0041] The two ends of the plastic tube are coaxially connected to the inner wall of the right arc plate and the open end of the limiting cylinder, respectively.

[0042] Preferably, each ring clamp also includes two highly conductive metal cable ties;

[0043] Multiple guide strips are fixed at intervals along the length of the outer wall of the high-conductivity metal cable tie. The high-conductivity metal cable tie is tightly wrapped around the wire core, and the two high-conductivity metal cable ties correspond one-to-one with the wire cores of the two cable segments.

[0044] The inner wall of each curved plate has a guide groove along the axial direction of the support pipe, and the guide groove corresponds one-to-one with the guide strip.

[0045] The self-locking buckle of the high conductivity metal cable tie is located in the straight groove;

[0046] The inner wall of the right pipe section is in close contact with the straps of two highly conductive metal cable ties.

[0047] The guide bar has a triangular bar structure, and the guide groove has a triangular groove.

[0048] The wire core is made of multiple strands of aluminum wire, and the connector and metal cable tie are made of copper.

[0049] The beneficial effects of the above scheme are:

[0050] During cable laying, the cable body is sequentially passed through the oblique holes and annular receiving cavities of each tension shell. A pressing block at the end of a circumferentially arranged first spring extends into the annular receiving cavity. Under the preload of the first spring, the pressing block coils a portion of the cable body into the annular receiving cavity as a spiral section. A large external force overcomes the maximum static friction within the tension shell. At this point, the cable begins to slowly and controllably slide relative to the tension shell, meaning the spirally coiled cable body section is gradually pulled out or conveyed out of the annular receiving cavity. When rewinding the cable is required, the extension rod is detached from the guide rod. The cable body can then be coiled inside the tension shell, and the extension rod is reinstalled. After the cable passes through the oblique holes and annular receiving cavities of the tension shell, the first spring drives the pressing block to fix the spiral section of the cable within the cavity using preload, preventing relative loosening between the cable and the tension shell during laying and bending, thus ensuring structural stability. When subjected to external pulling force, the cable body must overcome the maximum static friction within the cavity to achieve slow and controllable sliding. The deformation of the helical section and the friction force together buffer the tensile force, preventing stress from acting directly on the internal core, thus preventing core breakage and insulation damage, and extending cable life. When rewinding the cable, only the extension rod on the lead rod needs to be removed to release the fixation; there is no need to disassemble the entire tensile shell. After rewinding, the extension rod can be reinstalled to restore use, simplifying assembly and maintenance processes and reducing labor and time costs. This structural design effectively prevents the cable from rapidly breaking or even snapping when subjected to sudden external pulling force.

[0051] The present invention also provides a cable support, including a high tensile cross-linked polyethylene multi-core cable, and a plurality of bending rods, each of which corresponds to a plurality of tensile shells. The two ends of the bending rods are bent to form two staggered hooks, which are hung on a wire rope. A bending plate is fixed in the middle of the bending rods, and a horizontal pipe is laid on the bending plate. Attached Figure Description

[0052] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0053] Figure 1 This is a partial structural schematic diagram of the present invention;

[0054] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0055] Figure 3 yes Figure 2 A structural diagram with one of the shells removed;

[0056] Figure 4 This is a schematic diagram of the structure of the housing of the present invention;

[0057] Figure 5 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0058] Figure 6 This is a schematic diagram of a partial three-dimensional structure of the second embodiment of the present invention after removing the electrical adhesive tape;

[0059] Figure 7 yes Figure 6 A three-dimensional structural diagram with the support ring removed;

[0060] Figure 8 yes Figure 7 A schematic diagram of the three-dimensional structure with one straight tube removed;

[0061] Figure 9 This is a partial cross-sectional view of the structure of the second embodiment of the present invention with the electrical adhesive tape removed;

[0062] Figure 10 This is a schematic diagram of the partial structural cross-section of the second embodiment of the present invention.

[0063] Explanation of reference numerals in the attached figures

[0064] 1. Cable segment; 11. Core; 12. Filler layer; 13. Flexible layer; 14. Outer insulation layer; 15. Inner insulation layer; 17. Tensile shell; 170. Disc; 1700. Shell; 1701. Inclined hole; 17010. Half-disc body; 1702. Ear plate; 171. Horizontal tube; 1711. First half-tube body; 172. Guide rod; 1721. Half-rod body; 1722. Threaded hole; 174. Annular receiving cavity; 175. Extension rod; 1751. First external thread; 176. First spring; 177. Pressing block; 1771. Inclined surface; 178. Guide tube; 1781. Second half-tube body;

[0065] 2. Heat dissipation assembly; 21. Support ring; 211. Inner ring; 212. Internal thread; 213. Extension tube; 22. Annular clamp; 220. Straight tube; 2201. Annular inclined surface; 2202. Second external thread; 221. Receiver tube; 2210. Straight groove; 2211. Left tube section; 22111. Straight blind groove; 2212. Tapered section; 2213. Right tube section; 22131. Arc 22132. Shaped plate; 22133. Left arc plate; 22134. Right arc plate; 22135. Support frame; 22136. Tooth; 22137. Plastic tube; 22138. Inner rod; 22139. Horizontal plate; 22130. Limiting cylinder; 22140. Second spring; 22141. Guide groove; 2214. Straight ring; 23. Main frame; 24. High conductivity metal cable tie; 25. Guide strip;

[0066] 3. Electrical adhesive tape; 31. Heat dissipation oval cavity;

[0067] 4. Bending rod; 41. Hook; 42. Bend plate;

[0068] 5. Steel wire rope. Detailed Implementation

[0069] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0070] First embodiment:

[0071] like Figure 1As shown, this embodiment provides a high tensile strength cross-linked polyethylene multi-core cable, including multiple cores 11, a filling layer 12, a flexible layer 13, and an outer insulation layer 14. Each core 11 is wrapped with an inner insulation layer 15, and the multiple inner insulation layers 15 are circumferentially embedded within the filling layer 12. The filling layer 12, flexible layer 13, and outer insulation layer 14 are sequentially arranged from the inside out. The outer insulation layer 14 is made of cross-linked polyethylene, the flexible layer 13 is made of polypropylene mesh tear tape, and the filling layer 12 is made of polyurethane foam. The cores 11 are formed by stranding multiple aluminum wires. The multiple cores 11, filling layer 12, flexible layer 13, and outer insulation layer 14 all utilize existing technology, and therefore will not be elaborated upon further. Refer to patent publication number: CN222507177U - Chinese Utility Model Patent: A Heavy-Duty Waterproof Rubber Flexible Cable. Figures 1-4 As shown, the outer insulation layer 14 has multiple tensile shells 17 evenly distributed along its length. Each tensile shell 17 includes a disk 170, a horizontal tube 171, and a guide rod 172. The disk 170 has an oblique hole 1701, the inlet end of which is located at the axis of one side wall of the disk 170. One end of the guide rod 172 and one end of the horizontal tube 171 are coaxially connected to the other side of the disk 170, and the guide rod 172 is sleeved inside the horizontal tube 171, as shown. Figure 3 As shown, the space between the inner cavity of the horizontal tube 171 and the guide rod 172 forms an annular receiving cavity 174. The outlet end of the inclined hole 1701 is located at an eccentric position on one side wall of the disk 170, and the outlet end of the inclined hole 1701 communicates with the annular receiving cavity 174. Figure 4 As shown, the other end of the guide rod 172 is coaxially and detachably connected to the extension rod 175. One end of the extension rod 175 has a first external thread 1751 circumferentially threaded. The end of the guide rod 172 furthest from the disc 170 has a threaded hole 1722 coaxially threaded, which is screwed into the first external thread 1751. This screwing connection between the threaded hole 1722 and the first external thread 1751 facilitates disassembly and assembly by the operator. Figure 3 , Figure 4 As shown, multiple first springs 176 are circumferentially fixed on each extension rod 175. Each first spring 176 is arranged radially along the horizontal tube 171, and a pressing block 177 is fixed to the free end of each first spring 176. The outer insulating layer 14 passes through the oblique hole 1701 and the annular receiving cavity 174 in sequence and exits the tensile shell 17. The outer insulating layer 14 is spirally coiled inside the annular receiving cavity 174. The pressing block 177 abuts against the outer insulating layer 14 through the first springs 176, so that the outer insulating layer 14 abuts against the inner wall of the horizontal tube 171. Figure 3As shown, each pressing block 177 has a beveled surface 1771 at one end facing the disk 170, which can abut against the outer insulating layer 14. The beveled surface 1771 is designed to facilitate the pulling out of the outer insulating layer 14. Furthermore, multiple pressing blocks 177 are circumferentially arranged around the extension rod 175. When the first spring 176 is in a free state, there is a gap between adjacent pressing blocks 177, which is smaller than the diameter of the outer insulating layer 14. This prevents the outer insulating layer 14 from getting stuck within the gap between the two pressing blocks 177.

[0072] During cable laying, the cable body (i.e., from the inside out, consisting of core 11, filler layer 12, flexible layer 13, and outer insulation layer 14) is sequentially passed through the oblique holes 1701 and annular receiving cavities 174 of each tensile shell 17. A pressing block 177 at the end of a circumferentially arranged first spring 176 extends into the annular receiving cavity 174. Under the preload of the first spring 176, the pressing block 177 coils a portion of the cable body into a spiral section within the annular receiving cavity 174. When a large external force overcomes the maximum static friction within the tensile shell 17, the cable body begins to slowly and controllably slide relative to the tensile shell 17; that is, the spirally coiled cable body section is gradually pulled out or conveyed out of the annular receiving cavity 174. After the cable passes through the inclined hole 1701 and the annular receiving cavity 174 of the tension shell 17, the first spring 176 drives the pressing block 177 to fix the cable spiral section in the cavity by pre-tightening force, preventing the cable from loosening relative to the tension shell 17 during laying and bending, and ensuring structural stability. When pulled by external force, the cable body needs to overcome the maximum static friction force in the cavity to achieve slow and controllable sliding. The deformation of the spiral section and the friction force together buffer the tensile force, preventing stress from acting directly on the internal core 11, preventing the core 11 from breaking and the insulation layer from being damaged, and improving the cable life. When it is necessary to rewind the cable, the extension rod 175 is removed from the guide rod 172. At this time, the cable body can be coiled inside the tension shell 17, and the extension rod 175 can be reinstalled. This simplifies the assembly and maintenance process and reduces manpower and time costs. Through this structural design, the rapid damage or even breakage of the cable when it encounters sudden external force pulling is effectively avoided.

[0073] like Figures 1-4 As shown, each tensile shell 17 also includes a guide tube 178, one end of which is coaxially connected to the side wall of the disc 170 away from the horizontal tube 171, and the guide tube 178 communicates with the oblique hole 1701. The addition of the guide tube 178 provides a smooth, coaxial guiding channel for the cable to enter the oblique hole 1701. Each tensile shell 17 includes two detachable, symmetrically interlocking shells 1700 (i.e., the tensile shell 17 is divided into two parts) and multiple bolts (not shown). Figure 4As shown, each housing 1700 includes a half-disc 17010, a first half-tube 1711, a half-rod 1721, and a second half-tube 1781. The two half-discs 17010, the two first half-tubes 1711, the two half-rods 1721, and the two second half-tubes 1781 are interlocked one-to-one, forming a disc 170, a horizontal tube 171, a guide rod 172, and a guide tube 178 in sequence. Two symmetrically interlocked housings 1700 are arranged such that the outer insulating layer 14 is secured within the oblique hole 1701. Ear plates 1702 are fixed to both ends of the half-discs 17010, the first half-tube 1711, and the second half-tube 1781, and multiple bolts pass through the two ear plates 1702 on the disc 170, the horizontal tube 171, or the guide tube 178 to connect to nuts. The two symmetrical, interlocking housings (1700) allow for direct installation at any designated point on the cable, eliminating the need to insert them through the cable end. This solves the technical challenge of adding tensile strength components to long-distance or already laid cables, significantly improving project adaptability.

[0074] Second embodiment:

[0075] like Figure 5 As shown, the high tensile cross-linked polyethylene multicore cable includes multiple cable segments 1. Adjacent cable segments 1 are electrically connected by a heat dissipation assembly 2, which is located within an annular receiving cavity 174. Figure 6 As shown, the heat dissipation assembly 2 includes a support ring 21 and multiple annular clamps 22 arranged circumferentially within the support ring 21. The number of annular clamps 22 corresponds to the number of conductors 11 in a single cable segment 1, and the two correspond one-to-one. This invention uses three sets of annular clamps 22, and the individual conductors 11 on two cable segments 1 are electrically connected through the annular clamps 22. Electrical adhesive tape 3 is wrapped around the connection point of two adjacent cable segments 1, forming a heat dissipation elliptical cavity 31. The support ring 21 is located within the heat dissipation elliptical cavity 31, and the outer diameter of the support ring 21 is greater than the sag of the outer insulation layer.

[0076] Cable joints or connections are weak points where resistance increases and heat concentrates. This solution directly and tightly connects the metal ring clamp 22 to each conductor 11, quickly dissipating and dispersing the heat generated at the connection point throughout the support ring 21. The heat is then dissipated through the surface of the support ring 21 into the air within the heat dissipation elliptical cavity 31 formed by the electrical tape wrapping, thereby reducing the temperature rise at the connection point. This allows the cable to operate safely at higher currents, improving overall power capacity and long-term thermal stability.

[0077] like Figure 7As shown, the heat dissipation assembly 2 also includes a main frame 23. Each annular clamp 22 includes a straight pipe 220 and a metal receiving pipe 221. The metal receiving pipe 221 can be made of copper or aluminum, and multiple straight pipes 220 are circumferentially fixed to the main frame 23. The straight pipes 220 are made of insulating material. An annular inclined surface 2201 is formed on the inner circumference of one end of each straight pipe 220, and a second external thread 2202 is formed on the outer circumference of each straight pipe 220. Figure 8 As shown, the receiving pipe 221 includes a left pipe section 2211, a tapered section 2212, a right pipe section 2213, and a straight ring 2214. The constricted end of the tapered section 2212 is coaxially connected to one end of the left pipe section 2211, and the flared section of the tapered section 2212 is coaxially connected to the outer ring of the straight ring 2214. The inner ring of the straight ring 2214 is coaxially and fixedly connected to the outer wall of the right pipe section 2213. The left pipe section 2211 and the tapered section 2212 can be inserted into the straight pipe 220, and the outer wall of the tapered section 2212 is in close contact with the annular inclined surface 2201. Multiple straight grooves 2210 are formed around the circumference of the receiving pipe 221. These grooves sequentially pass through the right pipe section 2213, the straight ring 2214, and the tapered section 2212. Multiple blind straight grooves 22111 are formed around one end of the circumference of the left pipe section 2211. These blind straight grooves 22111 correspond one-to-one with the straight grooves 2210 and are connected. Both the straight grooves 2210 and the blind straight grooves are arranged along the axial direction of the receiving pipe 221. Figure 9 As shown, an inner ring 211 is coaxially fixed to the inner wall of one end of the support ring 21, and an internal thread 212 is formed on the circumference of the inner wall of the support ring 21. The internal thread 212 is screwed into multiple second external threads 2202, so that the inner ring 211 abuts against the straight ring 2214, and the wire cores 11 of the two cable segments 1 are respectively clamped and inserted into the two ends of the right pipe segment 2213. One end of the support ring 21 is coaxially connected to the extension pipe 213, and the outer diameter of the support ring 21 is larger than the diameter of the outer insulation layer 14.

[0078] like Figure 1As shown, the two cable segments 1 to be connected are processed by stripping a certain length of the outer insulation layer 14, the flexible layer 13, and the filling layer 12, exposing the multiple conductor cores 11 inside. The corresponding conductor cores 11 of the two cable segments are then inserted into the two ends of the connector 221 (i.e., the opening of the right pipe segment 2213) from the left and right sides respectively. At this time, the connector 221 is in a relaxed state, and the conductor cores 11 can be easily inserted into place. The operator rotates the support ring 21 by hand or with a tool. Because the internal thread 212 of the inner wall of the support ring 21 engages with the second external thread 2202 of the outer wall of the multiple straight pipes 220, rotating the support ring 21 will push it axially. The advancement of the support ring 21 pushes its inner ring 211 at its end against the straight ring 2214 at the end of the connector 221. This axial pressure forces the tapered segment 2212 of the connector 221 to embed deeper into the annular inclined surface 2201 inside the straight pipe 220. The tapered segment 2212 is compressed by the inclined surface, generating a radial contraction force. This force, through the straight groove 2210 and the straight blind groove 22111, causes the receiving tube 221 to undergo elastic deformation, uniformly reducing its inner diameter, thereby firmly holding the two conductor cores 11 inside. Through the strong clamping force, the receiving tube 221 and the conductor cores 11 form a large-area, low-resistance, reliable electrical contact. The heat generated by the conductor cores 11 is efficiently conducted through the contact surface to the metal receiving tube 221, and then through the straight tube 220 and the main frame 23, finally diffusing to the entire support ring 21 for heat dissipation. Electrical adhesive tape 3 is wrapped around the connection of the cable segment 1, covering the support ring 21 and the extension tube 213, forming a relatively sealed heat dissipation elliptical cavity 31. This cavity concentrates heat and dissipates it efficiently through the surface of the support ring 21. With this structural design, a simple rotation of the support ring 21 can utilize the mechanical linkage between the threaded drive and the tapered structure. In addition, the conical and inclined surface structures convert the axial force of rotation into a continuous and uniform radial contraction force, forming a mechanical self-locking mechanism that provides constant high-pressure contact for the core 11.

[0079] like Figure 9As shown, each right pipe segment 2213 includes multiple circumferentially arranged arc-shaped plates 22131. Each arc-shaped plate 22131 includes a left arc plate 22132, a right arc plate 22133, and a support frame 22134. Multiple teeth 22135 are provided along the arc direction at one end of the left arc plate 22132 and one end of the right arc plate 22133, and the two sets of teeth 22135 are staggered and inserted into contact. The left arc plate 22132 is fixedly connected to the inner wall of the straight ring 2214. One end of the support frame 22134 is fixedly connected to the inner wall of the left arc plate 22132, and the other end of the support frame 22134 is fixed with a plastic tube 22136. The end of the plastic tube 22136 away from the support frame 22134 is fixedly connected to the inner wall of the right arc plate 22133. The receiving frame 22134 includes an inner rod 22137, a transverse plate 22138, and a limiting sleeve 22139. The two ends of the inner rod 22137 are fixedly connected to one end of the transverse plate 22138 and the inner wall of the left arc plate 22132, respectively. The other end of the transverse plate 22138 is fixedly fitted with the limiting sleeve 22139. Figure 10 As shown, a second spring 22140 is fixed to the inner bottom wall of the limiting cylinder 22139. One end of the second spring 22140 passes sequentially through the opening of the limiting cylinder 22139 and the inner cavity of the plastic tube 22136 along the axial direction of the limiting cylinder 22139, and is fixedly connected to the right arc plate 22133. The two ends of the plastic tube 22136 are coaxially connected to the inner wall of the right arc plate 22133 and the opening end of the limiting cylinder 22139, respectively. The transverse plate is made of non-conductive ceramic material.

[0080] At room temperature, the plastic tube 22136 maintains its solid structural integrity, resisting the expansion force of the internally compressed second spring 22140. At this time, the radial clamping force generated by the conical structure is smoothly transferred from the left arc plate 22132 through the intact plastic tube 22136 to the right arc plate 22133. The entire right tube section 2213 acts as a rigid whole, firmly clamping the wire core 11 and ensuring the stability of the electrical and mechanical connections. When the cable connection point experiences abnormally high temperatures or open flames due to overload, short circuit, or other reasons, heat is conducted to the plastic tube 22136, causing it to quickly soften, melt, and lose structural strength. Once the plastic tube 22136 fails, the second spring 22140, which was previously constrained by it, immediately loses its restraint and rapidly expands, releasing its elastic potential energy. The expansion force of the second spring 22140 pushes the right arc plate 22133 to move, causing it to disengage from the interlocking tooth structure 22135 of the left arc plate 22132. The integrity of the right pipe segment 2213 was compromised, and the clamping force on the internal wire core 11 disappeared instantly. The circuit was quickly cut off, which effectively prevented continuous arcing or high temperature from igniting surrounding materials, achieving safe isolation.

[0081] Each annular clamp 22 also includes two highly conductive metal cable ties 24. Multiple guide strips 25 are fixed at intervals along the length of the outer wall of the highly conductive metal cable ties 24. The highly conductive metal cable ties 24 are tightly clamped onto the wire core 11, with each of the two highly conductive metal cable ties 24 corresponding one-to-one with the wire core 11 of the two cable segments 1. A guide groove 22141 is formed on the inner wall of each arc-shaped plate 22131 along the axial direction of the receiving pipe 221, and the guide groove 22141 corresponds one-to-one with the guide strip 25. The self-locking buckle of the highly conductive metal cable ties 24 is located within the straight groove 2210. The inner wall of the right pipe segment 2213 is in close contact with the straps of the two highly conductive metal cable ties 24. The guide strips 25 have a triangular strip structure, and the guide grooves 22141 have a triangular groove.

[0082] Both the receiving tube 221 and the metal cable tie are made of copper. The highly conductive metal cable tie 24 tightly binds the stranded wire core 11 into a regular cylinder, forming a smooth and robust contact surface. When the right tube section 2213 contracts radially, its inner wall makes a large-area, high-strength surface contact with the metal outer surface of the cable tie, rather than contacting the easily deformable wire core 11. This significantly increases the effective conductive area and reduces contact resistance and temperature rise. It also provides a uniform and strong gripping force, preventing the wire core 11 from being pulled out or loosened.

[0083] Third embodiment:

[0084] like Figure 2 As shown, this embodiment provides a cable support, including a high-tensile cross-linked polyethylene multi-core cable and bending rods 4. Multiple bending rods 4 correspond one-to-one with multiple tensile shells 17. The two ends of the bending rods 4 are bent to form two staggered hooks 41, which are hung on a steel wire rope 5. A bent plate 42 is fixed in the middle of the bending rod 4, and a horizontal pipe 171 is placed on the bent plate 42. The design of the hooks 41 allows the cable to be easily hung or removed from the steel wire rope 5. If a support point or section of cable requires maintenance, the connection at that point can be relatively easily disconnected without disturbing the entire cable line. This improves the flexibility of construction and maintenance, and reduces the cost and difficulty of later operation and maintenance. In scenarios such as tunnels, mines, large factories, bridges, or crossing obstacles, cables need to be laid overhead to avoid complex underground environments, facilitate maintenance, or adapt to structural constraints. In such overhead laying schemes, suspending the cable on a load-bearing steel wire rope 5 is an effective method. The steel wire rope 5, as the main load-bearing component, is pre-tensioned and fixed to the anchor points at both ends or the intermediate support column, capable of bearing the weight of the cable itself and environmental loads. The suspended cable mainly bears its electrical function, theoretically avoiding direct exposure to huge tensile stress. In addition, an annular groove (not shown) is formed on the outer circumference of the horizontal tube 171, and the bending plate 42 is engaged in the annular groove. This makes the structure more stable.

[0085] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A high tensile strength crosslinked polyethylene multi-core cable comprising a plurality of cores, a filler layer, a soft layer, and an outer insulating layer, an inner insulating layer being wrapped around the outside of each of the cores, a plurality of the inner insulating layers being circumferentially embedded in the filler layer, the filler layer, the soft layer, and the outer insulating layer being successively fitted from the inside to the outside, characterized in that, The outer insulation layer is uniformly distributed with a plurality of tensile shells along the length direction thereof; ​ Each of the tensile shells comprises a disc, a horizontal tube and a guide rod; The disc is provided with an inclined hole, and the inlet end of the inclined hole is located at the axis of one side wall of the disc; One end of the guide rod and one end of the horizontal tube are coaxially connected to the other side of the disc, and are sleeved in the horizontal tube, and the space between the inner cavity of the horizontal tube and the guide rod forms an annular accommodating cavity, the outlet end of the inclined hole is located at the eccentric position of one side wall of the disc, and is in communication with the annular accommodating cavity; The other end of the guide rod is coaxially connected to an extension rod; A plurality of first springs are circumferentially arranged on the extension rod, and the free end of each first spring is fixedly provided with a pressing block; The outer insulation layer passes through the inclined hole and the annular accommodating cavity in sequence and out of the tensile shell, and is spirally wound in the annular accommodating cavity, the pressing block is abutted against the outer insulation layer through the first spring, so that the outer insulation layer is abutted against the inner wall of the horizontal tube; The cable comprises a plurality of cable segments; Two adjacent cable segments are electrically connected through a heat dissipation assembly, and the heat dissipation assembly is located in the annular accommodating cavity; The heat dissipation assembly comprises a support ring and a plurality of annular clamps circumferentially arranged in the support ring, the number of the annular clamps is consistent with that of the plurality of cores of a single cable segment, and they are one-to-one corresponding; A single core on two cable segments is electrically connected through the annular clamp; The connection part of two adjacent cable segments is wrapped with an electrician adhesive tape, the electrician adhesive tape is wrapped to form a heat dissipation oval cavity, and the support ring is located in the heat dissipation oval cavity; The heat dissipation assembly further comprises a main frame; Each annular clamp comprises a straight tube and a metal receiving tube; A plurality of straight tubes are circumferentially fixed on the main frame; The inner wall of one end of each straight tube is circumferentially provided with an annular inclined surface, and the outer wall is circumferentially provided with a second external thread; The receiving tube comprises a left tube segment, a tapered segment, a right tube segment and a straight ring; The closed end of the tapered segment is coaxially connected to one end of the left tube segment, and the flared end is coaxially connected to the outer circle of the straight ring, and the inner circle of the straight ring is fixedly connected to the outer wall of the right tube segment; The left tube segment and the tapered segment can be inserted into the straight tube, and the outer wall of the tapered segment is in contact with the annular inclined surface; The receiving tube is circumferentially provided with a plurality of straight through grooves, and the plurality of straight through grooves pass through the right tube segment, the straight ring and the tapered segment in sequence, one end of the left tube segment is circumferentially provided with a plurality of straight blind grooves, and the plurality of straight blind grooves are one-to-one corresponding to the plurality of straight through grooves and are in communication; The inner wall of one end of the support ring is coaxially fixed with an inner ring, and the inner wall is circumferentially provided with an inner thread; The inner thread is screwed with the plurality of second external threads, so that the inner ring is abutted against the straight ring, and the cores of two cable segments are respectively clamped and inserted into two ends of the right tube segment; One end of the support ring is coaxially connected to an extension pipe, and the outer diameter of the support ring is greater than the diameter of the outer insulation layer.

2. The high tensile strength crosslinked polyethylene multi-core cable according to claim 1, characterized by Each tensile shell further comprises a guide tube, one end of the guide tube is coaxially connected to the disc away from the side wall of the horizontal tube, and is in communication with the inclined hole.

3. The high tensile strength crosslinked polyethylene multi-conductor cable of claim 2, wherein, Each of the anti-pull shell comprises two detachable symmetrically buckled shells and a plurality of bolts; Each of the shell comprises a half disc body, a first half pipe body, a half rod body and a second half pipe body; Two half disc bodies, two first half pipe bodies, two half rod bodies and two second half pipe bodies are buckled one by one, so that the disc, the horizontal pipe, the guide rod and the guide pipe are formed in turn; The two symmetrically buckled shells are arranged so that the outer insulation layer is clamped in the inclined hole; Wherein, the two ends of the half disc body, the first half pipe body and the second half pipe body are fixedly provided with an ear plate, and a plurality of bolts pass through the two ear plates on the disc or the horizontal pipe or the guide pipe to screw the nut.

4. The high tensile strength crosslinked polyethylene multi-conductor cable of claim 1, wherein, The outer wall of one end of the extension rod is provided with a first external thread; A threaded hole is coaxially provided on the end of the guide rod away from the disc, and the threaded hole is screwed with the first external thread; Each of the pressing blocks is provided with an inclined surface at one end towards the disc, which can abut against the outer insulation layer.

5. The high tensile strength crosslinked polyethylene multi-conductor cable of claim 1, wherein, Each of the right pipe segments comprises a plurality of arc-shaped plates arranged at intervals around the circumference, the arc-shaped plates comprising left and right arc-shaped plates and a receiving frame; A plurality of teeth are provided on one end of the left arc-shaped plate and one end of the right arc-shaped plate along the arc, and the two sets of teeth are arranged in contact with each other in a staggered manner, the left arc-shaped plate is fixedly connected with the inner wall of the straight ring, one end of the receiving frame is fixedly connected with the inner wall of the left arc-shaped plate, and the other end is fixedly connected with a plastic pipe, and one end of the plastic pipe away from the receiving frame is fixedly connected with the inner wall of the right arc-shaped plate; The receiving frame comprises an inner rod, a transverse plate and a limiting cylinder; The two ends of the inner rod are respectively fixedly connected with one end of the transverse plate and the inner wall of the left arc-shaped plate, the other end of the transverse plate is fixedly sleeved with the limiting cylinder, the inner bottom wall of the limiting cylinder is fixedly provided with a second spring, one end of the second spring is sequentially passed through the opening of the limiting cylinder, the inner cavity of the plastic pipe and the right arc-shaped plate along the axial direction of the limiting cylinder and is fixedly connected with the right arc-shaped plate; Wherein, the two ends of the plastic pipe are respectively coaxially connected with the inner wall of the right arc-shaped plate and the open end of the limiting cylinder.

6. The high tensile strength crosslinked polyethylene multi-conductor cable of claim 5, wherein, Each of the annular clamps further comprises two high-conductivity metal straps; The outer wall of the high-conductivity metal strap is fixedly provided with a plurality of guide strips at intervals along the length direction, the high-conductivity metal strap is tightly clamped on the wire core, and the two high-conductivity metal straps are one-to-one corresponding to the wire cores of the two cable segments; The inner wall of each of the arc-shaped plates is provided with a guide groove along the axial direction of the receiving pipe, and the guide groove is one-to-one corresponding to the guide strips; The self-locking buckle head of the high-conductivity metal strap is located in the straight-through groove; Wherein, the inner wall of the right pipe segment is in contact with the strap body of the two high-conductivity metal straps; The guide strip is in a triangular strip structure, and the guide groove is in a triangular groove; The wire core is twisted by a plurality of metal aluminum wires, and the receiving pipe and the metal strap are made of metal copper material.

7. A cable support, characterized by The high-tensile crosslinked polyethylene multi-core cable of any one of claims 1-6, further comprising a plurality of bending rods, each of the plurality of bending rods corresponding to one of the plurality of tensile shells, both ends of each of the plurality of bending rods being bent to form two misaligned hooks, the two misaligned hooks being hung on a steel wire rope, a bending plate being fixedly arranged at a middle portion of each of the plurality of bending rods, and the cross tube being arranged on the bending plate.

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