Heat-resistant environment-friendly low-voltage cable

Abstract

The utility model discloses a kind of heat-resistant environment-friendly low-voltage cable, relate to cable technical field.A kind of heat-resistant environment-friendly low-voltage cable, including wear-resistant outer layer, heat-resistant middle layer, insulating inner layer, cable core, the inside of wear-resistant outer layer is fixedly connected with the outer surface of heat-resistant middle layer, the inside of heat-resistant middle layer is fixedly connected with the outer surface of insulating inner layer, the inside of insulating inner layer is fixedly connected with the outer surface of cable core, the inner wall of heat-resistant middle layer is equipped with three annular flow guide grooves, three annular flow guide grooves surround the outside of insulating inner layer, after the heat exported by heat dissipation flow guide hole enters heat dissipation long groove, with the space structure of heat dissipation long groove, heat is evenly radiated to the inside of four heat dissipation long grooves, to effectively disperse the heat exported between wear-resistant outer layer, to significantly improve the overall heat dissipation efficiency of cable, further enhance the heat resistance of cable, ensure that cable can still operate stably under long time work or high temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a heat-resistant and environmentally friendly low-voltage cable. Background Technology

[0002] In the field of low-voltage power transmission, cables are the key carriers for power distribution and transmission. Their operational stability, heat resistance and heat dissipation efficiency directly affect the safe and reliable operation of the power system. With the rapid development of industrial automation, building electrification and new energy fields, the application scenarios of low-voltage cables are becoming increasingly complex. They not only need to adapt to harsh environments such as high temperature, dust and frequent friction, but also need to meet the requirements of environmental protection and efficient heat dissipation.

[0003] Traditional low-voltage cables often suffer from insufficient heat dissipation efficiency in their structural design. Most cables employ a multi-layered wrapping structure, where the heat generated during operation must be gradually transferred outward through the inner insulation layer and the middle protective structure. However, due to the limited thermal conductivity of each layer of material and the lack of dedicated heat guidance and dispersion channels between layers, heat tends to accumulate inside the cable. Especially under prolonged high-load operation, the internal heat cannot be quickly dissipated, leading to an overall increase in cable temperature, which may result in safety accidents due to overheating. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a heat-resistant and environmentally friendly low-voltage cable that can solve the problem of the lack of a dedicated heat conduction and dispersion channel between layers, the easy accumulation of heat inside the cable, and the inability to quickly dissipate internal heat, especially under long-term high-load operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heat-resistant and environmentally friendly low-voltage cable, comprising a wear-resistant outer layer, a heat-resistant middle layer, an insulating inner layer, and a cable core. The inner side of the wear-resistant outer layer is fixedly connected to the outer surface of the heat-resistant middle layer, the inner side of the heat-resistant middle layer is fixedly connected to the outer surface of the insulating inner layer, and the inner side of the insulating inner layer is fixedly connected to the outer surface of the cable core. The inner wall of the heat-resistant middle layer is provided with three annular flow guide grooves, which surround the outer surface of the insulating inner layer.

[0006] Preferably, the outer surface of the heat-resistant middle layer is provided with a plurality of heat dissipation guide holes, and the interior of the plurality of heat dissipation guide holes is respectively connected to the interior of the corresponding annular guide groove.

[0007] Preferably, the inner wall of the wear-resistant outer layer is provided with four heat dissipation grooves, which are located on the upper, lower, left, and right surfaces of the inner wall of the wear-resistant outer layer, respectively.

[0008] Preferably, the interiors of the four heat dissipation slots are respectively opposite to the interiors of the multiple heat dissipation guide holes.

[0009] Preferably, the heat-resistant middle layer has a mesh anti-slip texture inside, which surrounds the outer surface of the insulating inner layer.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. This heat-resistant and environmentally friendly low-voltage cable allows heat to be drawn out through the heat dissipation holes and then enter the heat dissipation grooves. With the help of the spatial structure of the heat dissipation grooves, the heat is evenly distributed into the interior of the four heat dissipation grooves, thereby effectively dispersing the heat drawn out between the wear-resistant outer layers. This significantly improves the overall heat dissipation efficiency of the cable, further enhances the heat resistance of the cable, and ensures that the cable can still operate stably under long-term operation or high-temperature environment. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the three-dimensional structure of a heat-resistant and environmentally friendly low-voltage cable according to this utility model; Figure 2 This is a schematic diagram of the heat dissipation and airflow guiding hole structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the heat dissipation groove of this utility model; Figure 4 This is a schematic diagram of the internal structure of the heat-resistant middle layer of this utility model; Figure 5 This is a plan view of the heat dissipation slot of this utility model.

[0012] Reference numerals: 1. Wear-resistant outer layer; 2. Heat-resistant middle layer; 3. Insulating inner layer; 4. Cable core; 5. Heat dissipation and drainage holes; 6. Annular drainage groove; 7. Mesh anti-slip texture; 8. Long heat dissipation groove. Detailed Implementation

[0013] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0014] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0016] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0017] Please see Figure 1-5 This utility model provides a technical solution: a heat-resistant and environmentally friendly low-voltage cable, including a wear-resistant outer layer 1, a heat-resistant middle layer 2, an insulating inner layer 3, and a cable core 4. The inner side of the wear-resistant outer layer 1 is fixedly connected to the outer surface of the heat-resistant middle layer 2, the inner side of the heat-resistant middle layer 2 is fixedly connected to the outer surface of the insulating inner layer 3, the inner side of the insulating inner layer 3 is fixedly connected to the outer surface of the cable core 4, and three annular guide grooves 6 are opened on the inner wall of the heat-resistant middle layer 2, which surround the outer side of the insulating inner layer 3.

[0018] Furthermore, the outer surface of the heat-resistant middle layer 2 is provided with multiple heat dissipation guide holes 5, and the interior of the multiple heat dissipation guide holes 5 is connected to the interior of the corresponding annular guide grooves 6.

[0019] Furthermore, the inner wall of the wear-resistant outer layer 1 is provided with four heat dissipation grooves 8, which are located on the upper, lower, left and right surfaces of the inner wall of the wear-resistant outer layer 1, respectively, and the interior of the four heat dissipation grooves 8 is respectively opposite to the interior of the multiple heat dissipation guide holes 5.

[0020] Furthermore, the interior of the heat-resistant middle layer 2 is provided with a grid anti-slip texture 7, which surrounds the outer surface of the insulating inner layer 3.

[0021] Furthermore, in terms of the basic functions of power transmission, the cable core 4, as the core component for current conduction, undertakes the task of transmitting low-voltage power. The insulating inner layer 3 tightly wraps around the outer surface of the cable core 4, and through its excellent insulation performance, it isolates the cable core 4 from the external structure, effectively preventing current leakage, ensuring the safety of power transmission, and avoiding safety accidents and energy waste caused by leakage.

[0022] Furthermore, the heat-resistant middle layer 2 plays a crucial role in addressing heat resistance and heat dissipation requirements. It possesses excellent heat resistance, directly resisting the heat generated by the external environment and the internal cable core 4 during operation, providing stable high-temperature resistance protection for the internal structure of the cable. Meanwhile, three annular flow channels 6 on the inner wall of the heat-resistant middle layer 2 surround the outer side of the insulating inner layer 3. When the cable core 4 generates heat during power transmission, the heat is transferred to the heat-resistant middle layer 2 through the insulating inner layer 3. The annular flow channels 6 can collect and guide the heat. The multiple heat dissipation holes 5 on the outer surface of the heat-resistant middle layer 2 are connected to the inside of the annular flow channels 6, allowing the heat collected in the annular flow channels 6 to be discharged outward through the heat dissipation holes 5.

[0023] Furthermore, the wear-resistant outer layer 1 not only protects the overall cable structure from external friction, collision and other damage by virtue of its wear-resistant properties, thus extending the cable's service life, but also has four heat dissipation grooves 8 (located on the upper, lower, left and right surfaces respectively) on its inner wall, which correspond to the heat dissipation guide holes 5, forming a complete heat dissipation channel. After the heat dissipation guide holes 5 are discharged into the heat dissipation grooves 8, the heat is evenly distributed to the interior of the four heat dissipation grooves 8 by means of the spatial structure of the heat dissipation grooves 8, thereby effectively dispersing the discharged heat between the wear-resistant outer layers (since the heat dissipation grooves 8 are on the outermost layer of the cable, the heat inside will slowly dissipate to the outside), thus significantly improving the overall heat dissipation efficiency of the cable, further enhancing the cable's heat resistance, and ensuring that the cable can still operate stably under long-term operation or high-temperature environment.

[0024] Furthermore, in terms of structural stability, the grid anti-slip texture 7 inside the heat-resistant middle layer 2 surrounds the outer surface of the insulating inner layer 3. By increasing the friction between the heat-resistant middle layer 2 and the insulating inner layer 3, it effectively prevents the insulating inner layer 3 from shifting or shaking inside the cable. This fixing effect ensures that the cable core 4 is always in a stable position.

[0025] Furthermore, the wear-resistant outer layer 1 maintains excellent wear resistance while possessing slight breathability to assist the heat dissipation groove 8 in dissipating internal heat. The wear-resistant outer layer 1 is made of an environmentally friendly modified polyolefin elastomer (POE) and carbon fiber composite braided material. Polyolefin elastomer (POE) itself has good toughness and impact resistance. After being reinforced and modified by adding short-cut carbon fibers, its surface hardness and wear resistance are significantly improved, which can effectively resist mechanical damage such as external friction and scratches, meeting the core requirement of the wear-resistant outer layer for structural protection. In terms of breathability, the material is formed by a braiding process, which creates a micro-pore structure between the fibers. The size of these pores is controllable (usually at the micrometer level), which can ensure that air molecules can pass through to achieve heat exchange, while preventing a large amount of moisture, dust and other impurities from seeping in. Thus, while achieving slight breathability, the cable's protective performance is maintained. When heat accumulates in the heat dissipation groove 8, the heat can be slowly diffused to the external environment through these micro-pores. Combined with the heat dissipation groove, heat dissipation guide hole and annular guide groove to form a heat dissipation system, the heat dissipation efficiency of the cable is further improved.

[0026] Furthermore, the heat-resistant middle layer 2, as the core guarantee layer for the heat resistance performance of the cable, is preferably made of a composite modified material of cross-linked polyethylene (XLPE) and mica powder, which can work stably for a long time in an environment of 105 to 125 degrees Celsius. After adding mica powder, the heat resistance and mechanical strength of the material are further enhanced by the high temperature resistance, insulation and chemical stability of mica powder. At the same time, the sheet-like structure of mica powder can also improve the barrier performance of the material and reduce the heat transfer to the interior. This composite modified material not only has outstanding heat resistance, but also does not release harmful gases during the processing, which meets the environmental protection requirements and can well meet the needs of the heat-resistant middle layer 2 in terms of heat resistance, structural support and connection with other layers.

[0027] Furthermore, the inner insulating layer 3 directly wraps around the cable core 4. Its core function is to achieve good insulation and prevent current leakage. The inner insulating layer 3 is made of environmentally friendly ethylene propylene diene monomer (EPDM) rubber. EPDM rubber has excellent electrical insulation properties, high volume resistivity, and low dielectric loss, which can effectively ensure the insulation reliability of the cable core 4 when transmitting power. It has good aging resistance and chemical stability, and can resist the effects of internal cable core heating and external environment for a long time. Moreover, its heat resistance temperature can reach about 120℃, which can adapt to the heat environment generated when the cable core is working. In addition, environmentally friendly ethylene propylene diene monomer does not contain halogens and will not release toxic and harmful gases when burning, which meets environmental protection requirements. At the same time, it has good flexibility and can tightly wrap around the cable core 4, forming a stable connection with the outer surface of the cable core and the inner wall of the heat-resistant middle layer 2, ensuring the structural integrity of the inner insulating layer 3 and the durability of its insulation function.

[0028] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A heat-resistant and environmentally friendly low-voltage cable, comprising a wear-resistant outer layer (1), a heat-resistant middle layer (2), an insulating inner layer (3), and a cable core (4), characterized in that: The inner side of the wear-resistant outer layer (1) is fixedly connected to the outer surface of the heat-resistant middle layer (2), the inner side of the heat-resistant middle layer (2) is fixedly connected to the outer surface of the insulating inner layer (3), the inner side of the insulating inner layer (3) is fixedly connected to the outer surface of the cable core (4), and three annular guide grooves (6) are opened on the inner wall of the heat-resistant middle layer (2), and the three annular guide grooves (6) surround the outside of the insulating inner layer (3).

2. The heat-resistant and environmentally friendly low-voltage cable according to claim 1, characterized in that: The outer surface of the heat-resistant middle layer (2) is provided with multiple heat dissipation guide holes (5), and the interior of the multiple heat dissipation guide holes (5) is connected to the interior of the corresponding annular guide groove (6).

3. The heat-resistant and environmentally friendly low-voltage cable according to claim 1, characterized in that: The inner wall of the wear-resistant outer layer (1) is provided with four heat dissipation grooves (8), which are located on the upper, lower, left and right surfaces of the inner wall of the wear-resistant outer layer (1).

4. The heat-resistant and environmentally friendly low-voltage cable according to claim 3, characterized in that: The interiors of the four heat dissipation slots (8) are respectively opposite to the interiors of the multiple heat dissipation guide holes (5).

5. The heat-resistant and environmentally friendly low-voltage cable according to claim 1, characterized in that: The heat-resistant middle layer (2) has a mesh anti-slip texture (7) inside, which surrounds the outer surface of the insulating inner layer (3).

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