High-efficiency heat dissipation type power cable

Abstract

The utility model relates to power cable technical field provides an efficient heat dissipation type power cable, including cable core and insulating layer and cladding layer, the inside of insulating layer is equipped with heat conduction core, is axial core body structure, and the even distribution is circumscribed, be equipped with the heat dissipation layer between insulating layer and cladding layer, is spiral winding installation, the main part of heat dissipation layer is heat conduction part, the inside of heat conduction part is equipped with honeycomb hole. The outside of heat conduction core is equipped with the convex ring of convex, and axial equidistance distribution. The both sides of heat conduction part are fixed with fixed ring, and the inside and outside both sides of heat conduction part are fixed with the bonding part and the adapter film through fixed ring. Through built -in heat conduction core of insulating layer axial transmission of the heat accumulation disperses, and then utilize heat conduction part radial conduction, and through the cooperation transmission of convex part and spiral groove to the inside of cladding layer, so as to promote heat discharge to the outside, realize the effect that efficient heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, and more specifically, to a high-efficiency heat dissipation power cable. Background Technology

[0002] Power cables are special conductors used for transmitting and distributing electrical energy. They typically consist of a conductor (copper or aluminum), an insulation layer, a shielding layer, and a protective outer sheath. They are mainly used in underground, underwater, or indoor applications where overhead lines are unsuitable. They offer advantages such as reliable power supply, high safety, adaptability to complex environments, and no need to occupy ground space, making them a critical infrastructure for urban power grids, industrial and mining enterprises, and inter-regional power transmission. Currently, power cables generate heat during operation due to conductor resistance and load current. Since cables mostly rely on the thermal conductivity of materials for heat dissipation, insufficient heat dissipation leads to internal heat accumulation, which can easily cause problems such as increased cable temperature, insulation aging, and decreased current carrying capacity. To address the aforementioned problems, this application proposes a high-efficiency heat dissipation power cable. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency heat-dissipating power cable to solve the problem of insufficient heat dissipation in existing cables.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: A high-efficiency heat-dissipating power cable includes a cable core, an insulation layer, and a sheathing layer; The insulating layer has a heat-conducting core inside, which is an axial core structure and is uniformly distributed circumferentially. A heat dissipation layer is provided between the insulation layer and the covering layer, and is installed by spiral winding. The main body of the heat dissipation layer is a heat-conducting part, and the interior of the heat-conducting part is provided with honeycomb holes.

[0005] Preferably, the outer side of the heat-conducting core is provided with raised rings, which are distributed at equal intervals along the axis.

[0006] Preferably, the heat-conducting part is fixed with fixing rings on both sides, and the inner and outer sides of the heat-conducting part are fixed with adhesive parts and adapter films through the fixing rings.

[0007] Preferably, the outer side of the adapter film is provided with a protrusion, and the inner side of the covering layer is provided with a spiral groove into which the protrusion is embedded.

[0008] Preferably, the interior of the honeycomb pores is filled with a thermally conductive medium of insulating silicone grease.

[0009] Preferably, the adhesive portion and the adapter film are used to seal the inside and outside of the honeycomb pores.

[0010] Preferably, the insulating layer has a receiving cavity and a side groove inside to accommodate the heat-conducting core and the convex ring.

[0011] The beneficial effects of this utility model are: 1. By axially laying the heat-conducting core, heat accumulated in local areas can be axially conducted during cable operation, thereby dispersing heat and preventing overheating caused by local accumulation, which helps to dissipate heat. 2. By spirally winding the heat dissipation layer, heat can be transferred radially outward during cable operation. The cooperation between the protrusions and the spiral grooves increases the heat conduction area, thereby promoting heat dissipation and achieving efficient heat dissipation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the radial cross-sectional structure of the cable according to this utility model; Figure 2 This is a schematic diagram of the combined structure of the heat-conducting core and the insulating layer of this utility model; Figure 3 This is a schematic diagram of the internal structure of the coating layer of this utility model; Figure 4 This is a schematic diagram of the heat dissipation layer structure of this utility model; Figure 5 This is a schematic diagram of the heat-conducting part structure of this utility model; The attached diagram lists the components represented by each number as follows: In the diagram: 11. Cable core; 12. Insulation layer; 121. Receiving cavity; 1211. Side groove; 13. Heat dissipation layer; 131. Heat-conducting part; 1311. Honeycomb hole; 1312. Fixing ring; 132. Adhesive part; 133. Adapter film; 134. Protrusion; 14. Covering layer; 141. Spiral groove; 15. Heat-conducting core; 151. Raised ring. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In the description of this utility model, it should be understood that the terms "opening", "top and bottom", "thickness", "top", "middle", "length", "inner" and "around" indicate the orientation or positional relationship only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] A high-efficiency heat dissipation power cable is designed to improve the heat dissipation performance of the cable. The heat is dispersed by axial transfer through the heat-conducting core 15 built into the insulation layer 12, and then radially conducted by the heat-conducting part 131. The heat is then transferred to the interior of the covering layer 14 through the cooperation of the protrusion 134 and the spiral groove 141, thereby promoting the heat to be discharged to the outside and achieving the effect of high-efficiency heat dissipation. In some embodiments, the specific structure of the high-efficiency heat dissipation power cable is as follows: Figure 1-5 As shown, from the inside out, it includes a cable core 11, an insulation layer 12, a heat dissipation layer 13, and a covering layer 14. Cable core 11, located in the central area of ​​the cable, includes a conductor, filling material, and shielding structure; The conductor is made of annealed soft copper wire, the filler material is made of water-blocking yarn or polypropylene, and the shielding structure is made of extruded semi-conductive cross-linked polyethylene or copper-plastic composite tape. The insulation layer 12, located on the outer layer of the cable core 11, is made of cross-linked polyethylene. The outermost layer 14, located on the cable, is made of weather-resistant polyvinyl chloride or halogen-free low-smoke flame-retardant polyolefin. The heat dissipation layer 13 is spirally wound and installed after the insulation layer 12 is formed to form a closed encapsulation structure; The heat dissipation layer 13 includes a heat-conducting part 131, an adhesive part 132, and an adapter film 133; The adhesive portion 132 and the adapter film 133 are respectively bonded to the inner and outer sides of the heat-conducting portion 131, and the outer side of the adapter film 133 has a protrusion portion 134. It should be noted that the heat-conducting part 131 and the protrusion 134 are both made of high thermal conductivity polyethylene or polypropylene, and the adhesive part 132 and the transfer film 133 are made of modified epoxy resin film or polyurethane hot melt adhesive film. Furthermore, the interior of the heat-conducting part 131 is a densely distributed honeycomb hole 1311, and the interior of the honeycomb hole 1311 is filled with a heat-conducting medium to promote the conduction of heat from the inside to the outside. It should be noted that the thermally conductive medium is insulating silicone grease, preferably high thermal conductivity silicone gel or high thermal conductivity silicone grease; Furthermore, the heat-conducting part 131 has solid retaining rings 1312 on both sides for bonding part 132 and adapter film 133; It should be noted that the adapter film 133 is used to prevent the protrusion 134 from entering the interior of the honeycomb pore 1311 during extrusion molding; In addition, during extrusion molding, the coating layer 14 covers the outside of the transfer film 133 and the protrusion 134, and the portion that adheres to the protrusion 134 forms a spiral groove 141. It should be noted that the protrusion 134 and the spiral groove 141 fit together, which can not only increase the heat conduction area and promote the heat transfer to the coating layer 14, but also shorten the distance between the heat and the outside world, thereby promoting the heat dissipation effect. It is understandable that the heat dissipation layer 13 can replace the traditional thicker sheathing layer 14 of the cable. By using its honeycomb structure and the reinforcement structure of the sheathing layer 14 with the protrusions 134, it can ensure the structural stability of the cable and avoid increasing the overall diameter of the cable. In addition, before the insulation layer 12 is extruded, multiple heat-conducting cores 15 are axially laid on the outside of the cable core 11, and the outside of the heat-conducting core 15 has a protruding ring 151. The heat-conducting core 15 and its outer convex ring 151 are made of high thermal conductivity carbon fiber bundles or nickel-plated carbon fibers. It should be noted that the axial installation of the heat-conducting core 15 can conduct heat axially in the heat accumulation area, thereby achieving the effect of dispersing heat and enabling the local heat accumulation to be transferred outward in multiple areas at the same time, thereby promoting the heat dissipation effect. It is understandable that during the extrusion molding of the insulating layer 12, a receiving cavity 121 and a side groove 1211 are formed inside it to accommodate the heat-conducting core 15 and the convex ring 151.

[0017] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0018] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency heat-dissipating power cable, characterized in that: Includes cable core (11), insulation layer (12), and sheathing layer (14); The insulating layer (12) has a heat-conducting core (15) inside, which is an axial core structure and is uniformly distributed in the circumferential direction; A heat dissipation layer (13) is provided between the insulating layer (12) and the covering layer (14), which is installed by spiral winding. The main body of the heat dissipation layer (13) is a heat-conducting part (131), and the interior of the heat-conducting part (131) is provided with honeycomb holes (1311).

2. The high-efficiency heat dissipation power cable according to claim 1, characterized in that: The outer side of the heat-conducting core (15) is provided with raised rings (151) that are evenly distributed axially.

3. The high-efficiency heat-dissipating power cable according to claim 1, characterized in that: The heat-conducting part (131) is fixed with fixing rings (1312) on both sides, and the inner and outer sides of the heat-conducting part (131) are fixed with adhesive parts (132) and adapter films (133) through fixing rings (1312).

4. The high-efficiency heat dissipation power cable according to claim 3, characterized in that: The outer side of the adapter membrane (133) is provided with a protrusion (134), and the inner side of the covering layer (14) is provided with a spiral groove (141) into which the protrusion (134) is embedded.

5. The high-efficiency heat dissipation power cable according to claim 1, characterized in that: The interior of the honeycomb pores (1311) is filled with an insulating thermally conductive medium, silicone grease.

6. The high-efficiency heat dissipation power cable according to claim 3, characterized in that: The adhesive portion (132) and the adapter film (133) are used to seal the inside and outside of the honeycomb pores (1311).

7. The high-efficiency heat-dissipating power cable according to claim 1, characterized in that: The insulating layer (12) has a cavity (121) and a side groove (1211) for accommodating the heat-conducting core (15) and the convex ring (151).

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