An aerial cable with heat dissipation performance

Abstract

The utility model relates to overhead cable technical field, the utility model provides an overhead cable with heat dissipation, including cable line, the outer end of cable line is equipped with heat dissipation subassembly, the heat dissipation subassembly includes the heat dissipation cover of sticking to the outer end of cable line, the inside of heat dissipation cover is stuck and is equipped with support cover, the heat dissipation subassembly still includes the heat dissipation cavity of setting up in the inside of heat dissipation cover, both ends of heat dissipation cover are fixedly connected with the outer plate that connects, the heat dissipation subassembly still includes the convection hole of setting up in the outer end of outer plate, the convection hole with heat dissipation cavity position corresponds and is linked together, the inside fixedly connected with the barrier net of convection hole. Through the above technical scheme, the cable line in the high temperature environment under the cable line of wrapping due to the heat of the resistance of material itself not easy to dissipate in the transmission process of being exposed to the outside environment, leads to the cable line to appear spontaneous combustion and short circuit and other technical problems easily.

Description

Technical Field

[0001] This utility model relates to the field of overhead cable technology, and more specifically, to an overhead cable with heat dissipation performance. Background Technology

[0002] Overhead cables are power transmission cables installed on utility poles. They have insulation layers and protective sheaths, falling between overhead conductors and underground cables, and combining the advantages of high power supply reliability, good safety, and reasonable economy. Overhead cables are installed at a certain height above the ground, and the conductors are wrapped with materials such as cross-linked polyethylene, making them safer than bare conductors. Overhead cables are typically single-core, made of materials including hard aluminum wire, hard copper wire, or aluminum alloy, with some using steel core reinforcement. Due to their reliability and economy, overhead cables are widely used in the power transmission field. Their insulation layers reduce the risk of short circuits, adapt to complex environments, and the installation and maintenance costs of overhead cables are lower than those of underground cables, requiring no large-scale civil engineering projects.

[0003] Overhead cables are directly exposed to the external environment and are more susceptible to temperature changes compared to underground cables. During power transmission, the heat generated by the cable's resistance causes its temperature to rise, and the high temperature further increases this temperature. When the cable temperature is too high, the insulation layer ages faster, leading to a decline in insulation performance. This significantly increases the risk of short circuits or leakage in overhead cables, threatening the stable operation of the power system. Furthermore, overheating of overhead cables can cause current to break down the insulation layer, leading to phase-to-phase short circuits and tripping. In severe cases, this can cause fires, resulting in casualties and equipment damage. Additionally, overhead cables, laid at high altitudes, are difficult to maintain in a timely manner.

[0004] To reduce the probability of overheating in overhead cables, existing technologies have improved the insulation materials and internal structure of overhead cables. For the insulation layer, rubber materials with strong heat insulation properties are often used. However, the heat generated during power transmission within the cable remains trapped inside the insulation layer, and the insulating properties of the insulation layer prevent heat dissipation, resulting in low heat dissipation efficiency. Improvements to the insulation structure often involve creating cavities within the insulation layer to allow heat generated by the cable to flow within these cavities, thus achieving a heat dissipation effect. However, when the ambient temperature is high, the efficiency of heat exchange between the hot airflow within the cavity and the outside air is low, further limiting the heat dissipation effect of the overhead cable. Under high ambient temperatures, overhead cables still have a high probability of overheating and spontaneous combustion. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides an overhead cable with heat dissipation performance, which solves the technical problem that the heat generated by the cable sheath due to the resistance of the material itself is not easily dissipated during the power transmission process, which leads to spontaneous combustion and short circuits in cables exposed to the external environment.

[0006] According to one aspect, at least one embodiment of the present invention provides an overhead cable with heat dissipation performance, including a cable, a heat dissipation component sleeved on the outer end of the cable, the heat dissipation component including a heat dissipation sleeve attached to the outer end of the cable, and a support sleeve attached inside the heat dissipation sleeve;

[0007] The heat dissipation assembly also includes a heat dissipation cavity formed inside the heat dissipation sleeve, and both ends of the heat dissipation sleeve are fixedly connected to an external plate.

[0008] The heat dissipation assembly also includes a convection hole opened at the outer end of the external plate. The convection hole corresponds to and is connected to the heat dissipation cavity. A barrier mesh is fixedly connected inside the convection hole.

[0009] For example, the inner cross-section of the support sleeve is toothed, and the heat dissipation assembly also includes a heat-conducting cavity opened inside the support sleeve, and both the heat-conducting cavity and the heat dissipation cavity have fan-shaped cross-sections.

[0010] For example, both the heat-conducting cavity and the heat-dissipating cavity are provided in five groups, and the five groups of heat-conducting cavities and heat-dissipating cavities are arranged in a ring at equal intervals.

[0011] For example, the heat dissipation assembly also includes a claw fixedly connected to the outer end of the external plate, and the outer end of the claw is threadedly connected to a fixing sleeve.

[0012] For example, the heat dissipation sleeve is composed of a heat insulation layer and a reflective layer, with the heat insulation layer attached to the outer end of the support sleeve and the reflective layer disposed at the outer end of the heat insulation layer.

[0013] For example, the heat insulation layer is made of silicone rubber, the reflective layer is made of fluorosilicone rubber, and both the heat insulation layer and the reflective layer have a thickness of 1 mm.

[0014] For example, the heat sink sleeve has five sets of reinforcing holes arranged in a ring, and a reinforcing core is fitted inside the reinforcing holes.

[0015] For example, the heat sink sleeve has lightweight holes inside, and there are five groups of lightweight holes, with two lightweight holes in each group, which are symmetrical about the reinforcing holes.

[0016] The beneficial effects of the embodiments of this utility model are as follows:

[0017] In this invention, a support sleeve clamps and supports the cable, preventing the outer insulation layer of the cable from contacting the heat dissipation sleeve. This allows the heat generated by the cable during power transmission to quickly enter the heat-conducting cavity inside the support sleeve. The overhead cable is laid in the cavity, and the flowing airflow accelerates the flow rate of the hot air inside the heat dissipation cavity, thereby quickly dissipating the heat radiated by the cable. This effectively cools and dissipates the heat, preventing the cable from overheating, which could lead to current breakdown of the insulation layer, causing short circuits and spontaneous combustion. This would also affect the heat dissipation cavity's ability to dissipate heat generated during power transmission. Multiple sets of convection holes at the outer end of the outer plate increase the airflow, improving the cable's heat dissipation effect. The heat insulation layer isolates external temperatures, reducing the amount of air temperature transferred to the heat dissipation cavity. This prevents the heat dissipation sleeve from being exposed to sunlight and excessively high temperatures inside the heat dissipation cavity. The reflective layer reflects ultraviolet rays, preventing direct sunlight from hitting the outer insulation layer of the cable and causing excessively high external temperatures. The heat dissipation sleeve is fixed using an outer plate, allowing for multi-section assembly of the cable for easy installation and disassembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an overhead cable with heat dissipation performance in one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection structure between the heat dissipation sleeve and the support sleeve of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the outer plate of this utility model;

[0022] Figure 4 This is a cross-sectional view of the heat dissipation sleeve of this utility model.

[0023] In the diagram: 1. Cable; 2. Heat dissipation assembly; 201. Heat dissipation sleeve; 202. Support sleeve; 203. Heat conduction cavity; 204. Heat dissipation cavity; 205. External plate; 206. Convection hole; 207. Barrier mesh; 208. Claw; 209. Fixing sleeve; 3. Heat insulation layer; 4. Reflective layer; 5. Reinforcing hole; 6. Reinforcing core; 7. Lightweight hole. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0025] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0026] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, 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.

[0029] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] like Figures 1-4As shown, it illustrates an overhead cable with heat dissipation performance in one embodiment of the present invention, including a cable 1, a heat dissipation component 2 sleeved on the outer end of the cable 1, the heat dissipation component 2 including a heat dissipation sleeve 201 attached to the outer end of the cable 1, and a support sleeve 202 attached inside the heat dissipation sleeve 201.

[0031] The heat dissipation assembly 2 also includes a heat dissipation cavity 204 opened inside the heat dissipation sleeve 201, and an external plate 205 is fixedly connected to both ends of the heat dissipation sleeve 201.

[0032] The heat dissipation assembly 2 also includes a convection hole 206 opened at the outer end of the external plate 205. The convection hole 206 corresponds to and is connected to the heat dissipation cavity 204. A barrier mesh 207 is fixedly connected inside the convection hole 206.

[0033] In some examples, when assembling cable 1 and heat sink 201, one end of cable 1 passes through one side of heat sink 201. At this time, support sleeve 202 clamps cable 1 from the outer end. During power transmission, the cable 1 generates heat due to resistance. The heat radiates outward from the insulation layer at the outer end of cable 1. The heat first enters the heat-conducting cavity 203 inside support sleeve 202 from the insulation layer at the outer end of cable 1. At this time, the air temperature inside heat-conducting cavity 203 increases, while the temperature inside cable 1 decreases accordingly. At high altitudes, since there are no obstacles, airflow is unimpeded, so the air velocity at high altitudes is greater than that at ground level, and the air temperature at high altitudes is lower than that at ground level. When the cable is installed in the high school, the airflow from the external environment enters the heat dissipation cavity 204 inside the heat dissipation sleeve 201 through the convection hole 206 at the outer end of the outer plate 205. Due to the small diameter of the heat dissipation hole 204, the airflow speed is increased. The accelerated airflow quickly dissipates the heat radiated from the heat conduction cavity 203 into the heat dissipation cavity, thereby rapidly reducing the temperature of the airflow inside the heat conduction cavity 203. The rapidly flowing airflow causes the heat generated by the power transmission of the cable 1 to be quickly discharged from the heat dissipation cavity 204, thus achieving the heat dissipation effect on the cable 1. Compared with the sealed heat insulation sleeve, the cooling effect of the cable 1 is stronger, preventing the temperature of the cable 1 from becoming too high, which could cause the current to break through the insulation layer of the cable 1, resulting in a short circuit and spontaneous combustion of the cable 1.

[0034] For example, such as Figure 3 As shown, the inner cross-section of the support sleeve 202 is toothed, and the heat dissipation assembly 2 also includes a heat conduction cavity 203 opened inside the support sleeve 202. Both the heat conduction cavity 203 and the heat dissipation cavity 204 have fan-shaped cross-sections.

[0035] In some examples, the toothed inner support sleeve 202 clamps and limits the cable 1, preventing the cable 1 inside the support sleeve 202 from contacting it. This reduces the cross-sectional area of ​​the cavity between the cable 1 and the support sleeve 202, thus affecting the outward radiation of heat from the cable 1. The fan-shaped heat-conducting cavity 203 and heat-dissipating cavity 204 allow the heat radiated outward from the cable 1 to enter quickly and accelerate the flow rate of the gas inside the heat-dissipating cavity 204, thereby improving the heat dissipation effect of the cable 1.

[0036] For example, such as Figure 3 As shown, both the heat conduction cavity 203 and the heat dissipation cavity 204 are provided with five sets, and the five sets of heat conduction cavities 203 and heat dissipation cavities 204 are arranged in a ring at equal intervals.

[0037] In some examples, multiple sets of heat-conducting cavities 203 enable the heat generated during the power transmission of cable 1 to radiate outward rapidly, improving the heat radiation effect of cable 1. At the same time, multiple sets of heat dissipation cavities 204 can simultaneously inject multiple streams of air, further accelerating the dissipation rate of the heat radiated from the heat-conducting cavity 203 to the inner cavity of the heat dissipation cavity 204, thereby further improving the heat dissipation performance of cable 1.

[0038] For example, such as Figure 3 As shown, the heat dissipation assembly 2 also includes a claw 208 fixedly connected to the outer end of the external plate 205, and a fixing sleeve 209 is threadedly connected to the outer end of the claw 208.

[0039] In some examples, as the heat sink 201 is fitted onto the outer end of the cable 1, the outer plates 205 at both ends of the heat sink 201 are engaged with the cable 1, and the fixing sleeve 209 passes through both ends of the cable 1. By rotating the outer fixing sleeve 209 of the claw 208, the claw 208 clamps and fixes the cable 1 from the outer end, thereby fixing the heat sink 201 at the outer end of the cable 1. The installation and removal of the heat sink 201 and the cable 1 are simple.

[0040] For example, such as Figure 4 As shown, the heat dissipation sleeve 201 is composed of a heat insulation layer 3 and a reflective layer 4. The heat insulation layer 3 is attached to the outer end of the support sleeve 202, and the reflective layer 4 is located at the outer end of the heat insulation layer 3.

[0041] In some examples, the cable 1 laid at high altitudes is closer to the sun, resulting in a higher temperature at the outer end of the insulation layer of the cable 1 at high altitudes compared to the cable 1 on the ground or underground. The heat insulation layer 3 attached to the outer end of the support sleeve 202 has a heat insulation effect, reducing the amount of heat transferred to the inside of the cable 1 from the high-temperature gas at high altitudes and the heat generated by direct sunlight. The reflective layer 4 can refract some of the ultraviolet rays in the sun, thereby preventing the heat dissipation sleeve 201 from being directly exposed to sunlight. This would cause the airflow temperature in the heat conduction cavity 203 inside the support sleeve 202 and the heat dissipation cavity 204 inside the heat dissipation sleeve 201 to rise, thus affecting the heat dissipation effect of the cable 1.

[0042] For example, such as Figure 4 As shown, the heat insulation layer 3 is made of silicone rubber, and the reflective layer 4 is made of fluorosilicone rubber. The thickness of both the heat insulation layer 3 and the reflective layer 4 is 1 mm.

[0043] In some examples, silicone rubber material has good heat insulation effect and low cost. The reflective layer 4 made of fluorosilicone rubber material has good ultraviolet refraction effect. At the same time, the heat insulation layer 3 and the reflective layer 4 with a thickness of 1mm reduce the cost of heat dissipation sleeve 201.

[0044] like Figure 2 and Figure 4 As shown, it illustrates an overhead cable with heat dissipation performance in another embodiment of the present invention. The heat dissipation sleeve 201 has reinforcing holes 5 inside, and there are five sets of reinforcing holes 5 arranged in a ring. A reinforcing core 6 is sleeved inside the reinforcing holes 5.

[0045] In some examples, the reinforcing core 6 inside the reinforcing hole 5 enhances the strength and toughness of the heat dissipation sleeve 201. At the same time, the heat dissipation sleeve 201 and the support sleeve 202 have a certain degree of elasticity, making them easy to bend and fold, and suitable for the laying of overhead cables in different scenarios.

[0046] For example, such as Figure 4 As shown, the heat dissipation sleeve 201 has lightweight holes 7 inside. There are five groups of lightweight holes 7, and each group of lightweight holes 7 has two holes, which are symmetrical about the reinforcing hole 5.

[0047] In some examples, the lightweight holes 7 inside the heat sink 201 reduce the weight of the heat sink 201 and prevent the weight of the heat sink 201 from being too large, which would increase the pressure on the laying device due to the weight of the heat sink 201.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An overhead cable with heat dissipation performance, comprising a cable (1), characterized in that: The outer end of the cable (1) is fitted with a heat dissipation assembly (2), the heat dissipation assembly (2) includes a heat dissipation sleeve (201) attached to the outer end of the cable (1), and a support sleeve (202) is attached inside the heat dissipation sleeve (201). The heat dissipation assembly (2) also includes a heat dissipation cavity (204) opened inside the heat dissipation sleeve (201), and both ends of the heat dissipation sleeve (201) are fixedly connected to an external plate (205). The heat dissipation assembly (2) also includes a convection hole (206) opened at the outer end of the outer plate (205). The convection hole (206) corresponds to and is connected to the heat dissipation cavity (204). A barrier mesh (207) is fixedly connected inside the convection hole (206).

2. The overhead cable with heat dissipation performance according to claim 1, characterized in that, The inner cross section of the support sleeve (202) is toothed, and the heat dissipation assembly (2) also includes a heat conduction cavity (203) opened inside the support sleeve (202). The cross sections of the heat conduction cavity (203) and the heat dissipation cavity (204) are both fan-shaped.

3. An overhead cable with heat dissipation performance according to claim 2, characterized in that, The heat-conducting cavity (203) and the heat-dissipating cavity (204) are each provided with five sets, and the five sets of heat-conducting cavity (203) and heat-dissipating cavity (204) are arranged in a ring at equal intervals.

4. An overhead cable with heat dissipation performance according to claim 1, characterized in that, The heat dissipation assembly (2) also includes a claw (208) fixedly connected to the outer end of the outer plate (205), and the outer end of the claw (208) is threadedly connected to a fixing sleeve (209).

5. An overhead cable with heat dissipation performance according to claim 1, characterized in that, The heat dissipation sleeve (201) is composed of a heat insulation layer (3) and a reflective layer (4). The heat insulation layer (3) is attached to the outer end of the support sleeve (202), and the reflective layer (4) is located at the outer end of the heat insulation layer (3).

6. An overhead cable with heat dissipation performance according to claim 5, characterized in that, The heat insulation layer (3) is made of silicone rubber, and the reflective layer (4) is made of fluorosilicone rubber. The thickness of both the heat insulation layer (3) and the reflective layer (4) is 1 mm.

7. An overhead cable with heat dissipation performance according to claim 1, characterized in that, The heat dissipation sleeve (201) has a reinforcing hole (5) inside. There are five sets of reinforcing holes (5) arranged in a ring. A reinforcing core (6) is sleeved inside the reinforcing hole (5).

8. An overhead cable with heat dissipation performance according to claim 7, characterized in that, The heat dissipation sleeve (201) has a lightweight hole (7) inside. There are five groups of lightweight holes (7), and each group of lightweight holes (7) has two holes and is symmetrical about the reinforcing hole (5).

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