Medium voltage aluminium alloy overhead insulated cable

Abstract

The application relates to the technical field of insulated cables, and discloses a medium-voltage aluminum alloy overhead insulated cable which comprises a stranded conductor, a hanging wire, an anti-icing and snow protection assembly and a binding and positioning assembly, the stranded conductor is externally covered with a shielding layer, a cross-linked polyethylene insulation layer and a wrapping layer in sequence, the hanging wire is arranged in parallel with the stranded conductor, the hanging wire and the wrapping layer are both externally covered with a sheath layer, the sheath layer outside the hanging wire and the sheath layer outside the wrapping layer are integrated, the anti-icing and snow protection assembly comprises a heat-conducting band and a temperature-rising mechanism, the heat-conducting band is arranged outside the sheath layer and wraps the outer circumferential surface of the upper half of the sheath layer, the temperature-rising mechanism is arranged inside the heat-conducting band, and a plurality of binding and positioning assemblies are arranged on the anti-icing and snow protection assembly; through the technical scheme, the problem that the medium-voltage overhead insulated cable in the prior art is generally subjected to ice removal through natural temperature rise or manual deicing when the surface is covered with ice, the ice removal efficiency is low, and certain risks exist is solved.

Description

Technical Field

[0001] This invention relates to the field of insulated cable technology, specifically to a medium-voltage aluminum alloy overhead insulated cable. Background Technology

[0002] Medium-voltage aluminum alloy overhead insulated cables are widely used power transmission equipment in urban and rural power distribution networks. Their rated voltage levels are typically 6kV to 35kV. These overhead insulated cables generally consist of a conductor, a shielding layer, and an insulation layer from the inside out. Some products also have a reinforcing layer and an outer sheath. When used in long-span lines across rivers, valleys, or other locations where high requirements are placed on the sag and mechanical strength of the overhead insulated cable, or when there are special requirements for the cable's resistance to ice and wind, it is necessary to select a profiled aluminum alloy conductor made of multiple strands of profiled aluminum alloy monofilaments twisted and compressed to meet the usage requirements.

[0003] In low-temperature environments during winter, the outer surface of overhead cables is prone to icing and snow accumulation. Icing increases the vertical load on the cable, increasing the conductor weight and potentially causing line breakage. It can also lead to increased cable sag. Currently, de-icing is mainly done by current melting, which heats the conductor by increasing the load current or using short-circuit current, causing the ice to melt and fall to the ground. This method uses load current heating as a preventative measure in the early stages of ice formation, but it reduces line voltage, increases power loss, and is difficult to use continuously for a long time. Furthermore, this de-icing method has significant limitations for overhead insulated cables widely used in medium-voltage distribution networks. The length of the de-icing line is also limited by factors such as power supply capacity. In addition, the structural design of medium-voltage overhead insulated cables mainly focuses on electrical performance and mechanical strength. When the cable surface is covered with ice, the ice layer is usually removed by natural heating or manual de-icing, which has relatively low de-icing efficiency and poses certain safety risks for manual de-icing. Summary of the Invention

[0004] This invention proposes a medium-voltage aluminum alloy overhead insulated cable to solve the problem that existing medium-voltage overhead insulated cables, when covered with ice, are generally de-iced by natural heating or manual de-icing, which has low de-icing efficiency and certain risks.

[0005] The technical solution of the present invention is as follows:

[0006] A medium-voltage aluminum alloy overhead insulated cable includes a stranded conductor, the stranded conductor being sequentially covered with a shielding layer, a cross-linked polyethylene insulation layer, and a wrapping tape layer, and further includes:

[0007] The suspension wire is arranged parallel to the stranded conductor. Both the suspension wire and the wrapping layer are covered with a sheath layer. The sheath layer outside the suspension wire and the sheath layer outside the wrapping layer are a whole.

[0008] An anti-icing and snow protection component, comprising a heat conduction tape and a heating mechanism, wherein the heat conduction tape is disposed outside the sheath layer and the heating mechanism is disposed inside the heat conduction tape, for resisting the adhesion of ice and snow and accelerating the melting of ice and snow falling onto the anti-icing and snow protection component;

[0009] The anti-icing and snow protection component is provided with several binding and positioning components for fixing the relative position of the anti-icing and snow protection component and the sheath layer.

[0010] To accelerate the melting rate of ice and snow on the heat conduction zone in low-temperature environments, the heating mechanism includes:

[0011] The conductive heat line wraps around the outer periphery of the upper half of the sheath layer, and the end of the conductive heat line is set with an arc-shaped structure and tilts away from the sheath layer to guide the direction of water flow.

[0012] A heating element is provided inside the conductive heat line to accelerate the melting of ice and snow accumulated on the conductive heat line.

[0013] Furthermore, several protruding ridges are arranged at intervals along the length of the conductive tape to accelerate the breaking and shedding of ice and snow on the conductive tape.

[0014] To provide a heat source, the heating element includes a heating wire, which is embedded in the heat-conducting tape in a serpentine shape and is continuously arranged along the length of the heat-conducting tape.

[0015] The heating wire is composed of a heating wire and a protective layer and a wear-resistant insulating layer that are sequentially wrapped from the inside to the outside. Both ends of the heating wire are located outside the heat-conducting tape, and sealing sleeves are fitted onto both ends of the heating wire. The sealing sleeves are sealed onto the heat-conducting tape.

[0016] The two ends of the heating wire are electrically connected to the live wire and the neutral wire of the power supply, respectively.

[0017] To secure the relative position of the heat-conducting tape and the sheath layer, the binding and positioning assembly includes:

[0018] The elastic clips are arranged at intervals on the conductive tape. The elastic clips are adapted to the shape of the conductive tape. Each elastic clip has a connecting piece fixed at both ends, and two connecting pieces on the elastic clip are arranged overlappingly.

[0019] Fasteners are used to connect two overlapping connecting pieces together.

[0020] Each of the elastic clips has several anti-slip grooves spaced apart at the position where it contacts the conductive tape, in order to suppress the relative sliding between the elastic clip and the conductive tape.

[0021] Furthermore, the stranded conductor is composed of a central monofilament and a profiled conductor layer disposed outside the central monofilament, wherein the cross-section of the central monofilament is circular;

[0022] The profiled conductor layer is formed by multiple profiled monofilaments arranged and twisted around the central monofilament, and the cross-section of the profiled monofilaments is irregular.

[0023] Furthermore, each of the profiled monofilaments has a protrusion on one side and a groove on the other side that matches the protrusion. When adjacent profiled monofilaments are twisted together, the protrusion of the latter monofilament is embedded in the groove of the former monofilament to form a radial lock.

[0024] The working principle and beneficial effects of this invention are as follows:

[0025] 1. In this invention, by setting up the heat-conducting tape, the heat-conducting tape wraps around the outer periphery of the upper half of the sheath layer. The accumulation of ice and snow on the overhead cable mainly occurs in the upper half (that is, the windward side and the upper surface). Therefore, the heating area is concentrated in the upper half, so that the heat acts on the icing area. This semi-wrapped structure avoids the energy waste caused by heating the entire cable. Since the lower half of the cable is not wrapped, it will not significantly affect the normal heat dissipation performance of the cable in the non-ice and snow season. At the same time, the end of the heat-conducting tape is set as an arc structure and tilted away from the sheath layer. When the ice and snow melt due to heat, the meltwater flows away along the flow direction of the arc end and will not remain on the cable surface, thereby preventing the meltwater from freezing again at the bottom of the cable.

[0026] 2. In this invention, several protruding ridges are arranged at intervals along the length of the conductive tape. Stress concentration will occur at the protruding ridges of the ice layer, thereby disrupting the continuity of the ice layer and making it easier for the ice layer to break into small pieces. Small pieces of ice are more likely to fall off under the action of gravity or wind than whole ice layers, thereby further improving the ice melting efficiency.

[0027] 3. In this invention, the heating wire is embedded in the heat-conducting tape in a serpentine shape, bending back and forth in the width direction of the heat-conducting tape to cover the entire width range of the heat-conducting tape. This makes the heat distribution more uniform in both the width and length directions of the heat-conducting tape, and the temperature field on the surface of the heat-conducting tape is relatively uniform, preventing local overheating or local underheating. The heating wire consists of a heating wire and a protective layer and a wear-resistant insulating layer that are sequentially wrapped from the inside out. The protective layer provides mechanical protection and electrical insulation, while the wear-resistant insulating layer enhances the wear resistance and insulation performance of the heating wire, thereby ensuring the electrical safety and mechanical durability of the heating wire during long-term use. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the overall planar structure of the present invention;

[0031] Figure 3 This is a cross-sectional view of the anti-icing and snow protection component in this invention.

[0032] Figure 4 This is a cross-sectional view of the anti-icing and snow protection component from another angle in this invention.

[0033] Figure 5 This is a schematic diagram of the binding and positioning component in this invention;

[0034] Figure 6 This is a schematic diagram of the structure of the stranded conductor, shielding layer, cross-linked polyethylene insulation layer, wrapping layer, suspension wire, and sheath layer in this invention.

[0035] In the diagram: 1. Stranded conductor; 2. Shielding layer; 3. Cross-linked polyethylene insulation layer; 4. Wrapping tape layer; 5. Suspension wire; 6. Sheath layer;

[0036] 101. Conductive heating tape; 102. Raised ridge; 103. Heating wire; 104. Sealing sleeve;

[0037] 201. Elastic clamp; 202. Connecting piece; 203. Fastener; 204. Anti-slip groove;

[0038] 301. Central monofilament; 302. Profile monofilament; 303. Protrusion; 304. Groove. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1 to 2 As shown, this embodiment proposes a medium-voltage aluminum alloy overhead insulated cable, including a stranded conductor 1. The stranded conductor 1 is sequentially covered with a shielding layer 2, a cross-linked polyethylene insulation layer 3, and a wrapping layer 4. The shielding layer 2 is used to uniform the electric field and prevent partial discharge. The cross-linked polyethylene insulation layer 3 provides electrical insulation. The wrapping layer 4 binds and fixes the internal structure. It also includes a suspension wire 5, an anti-icing and snow protection component, and a binding and positioning component. The suspension wire 5 is arranged parallel to the stranded conductor 1. Both the suspension wire 5 and the wrapping layer 4 are covered with a sheath layer 6. The sheath layer 6 outside the suspension wire 5 and the sheath layer 6 outside the wrapping layer 4 are a single unit. The anti-icing and snow protection component includes a heat-conducting tape 101 and a heating mechanism, such as... Figure 3 , Figure 4 As shown, the heat conduction cable 101 is disposed outside the sheath layer 6. Several protruding ridges 102 are arranged at intervals along the length of the heat conduction cable 101 to accelerate the breaking and shedding of ice and snow on the heat conduction cable 101. The heating mechanism is disposed inside the heat conduction cable 101 to resist the adhesion of ice and snow and accelerate the melting of ice and snow falling onto the anti-ice and snow protection component. The heating mechanism includes a heating component. The heat conduction cable 101 wraps around the outer periphery of the upper half of the sheath layer 6. The end of the heat conduction cable 101 is set as an arc structure and tilts away from the sheath layer 6 to guide the direction of water flow. The heating component is disposed inside the heat conduction cable 101 to accelerate the melting of ice and snow accumulated on the heat conduction cable 101.

[0041] Among them, such as Figure 2 As shown, the heat-conducting tape 101 wraps around the upper half of the outer periphery of the sheath layer 6. That is to say, the heat-conducting tape 101 only covers the upper half of the cable, and the lower half is not covered. Since the accumulation of ice and snow on the overhead cable mainly occurs in the upper half (windward side and upper surface), the heating area is concentrated in the upper half, and the heat is directly applied to the icing area, avoiding the energy waste caused by heating the entire cable. At the same time, since the lower half of the cable is not covered, it will not significantly affect the heat dissipation of the cable under normal circumstances.

[0042] When ice or snow accumulates on the cable surface in winter, the heating element is activated to generate heat. This heat is conducted through the heat conduction tape 101 to its surface. As a result, the surface temperature of the heat conduction tape 101 rises, and the ice and snow in contact with it begin to absorb the heat and melt. The melted water flows away along the arc-shaped structure at the end of the heat conduction tape 101, preventing it from stagnating on the cable surface. This guides the melted ice water down the end of the heat conduction tape 101, preventing secondary freezing at the bottom of the cable.

[0043] At the same time, the protrusions 102 on the surface of the heat-conducting tape 101 play an auxiliary role in breaking ice. Stress concentration occurs in the ice layer at the protrusions 102, thereby disrupting the continuity of the ice layer and making it easier for the ice layer to break into small pieces. Small pieces of ice are more likely to fall off under the action of gravity or wind than whole ice layers.

[0044] like Figure 3 , Figure 4 As shown, the heating component includes a heating wire 103, which is embedded in the heat-conducting tape 101 in a serpentine pattern. That is, the heating wire 103 bends back and forth along the width of the heat-conducting tape 101. This serpentine arrangement allows the heating wire 103 to cover the entire width of the heat-conducting tape 101. The heating wire 103 is continuously arranged along the length of the heat-conducting tape 101. The heating wire 103 consists of a heating wire and a protective layer and a wear-resistant insulating layer, which are sequentially wrapped from the inside out. The protective layer provides mechanical protection and electrical insulation, while the wear-resistant insulating layer enhances the wear resistance and insulation performance of the heating wire 103, thus ensuring the electrical safety and mechanical durability of the heating wire 103 during long-term use. Both ends of the heating wire 103 are located outside the heat-conducting tape 101, and each end is fitted with a sealing sleeve 104, which seals the heat-conducting tape 101. The two ends of the heating wire 103 are electrically connected to the live wire and neutral wire of the power supply, respectively.

[0045] The heating wire 103 extends from the inside of the heating cable 101 to the outside of the heating cable 101. The two ends of the heating wire 103 are used to connect the live wire and the neutral wire of the power supply, respectively. The sealing sleeve 104 fitted at the outlet of the heating wire 103 can prevent moisture from entering the interior of the heating cable 101 along the heating wire 103, blocking the entry path of moisture and avoiding electrical short circuits or reduced insulation performance caused by moisture seeping into the interior of the heating cable 101.

[0046] When ice and snow need to be melted in winter, the two ends of the heating wire 103 are connected to the live wire and neutral wire of the power supply, respectively. After the power is turned on, current flows through the heating wire. The heating wire has a certain resistance value, and Joule heating is generated when the current flows through it. The amount of heat generated depends on the square of the current, the resistance value, and the energizing time. The heat is transferred outward from the heating wire, passing through the protective layer and the wear-resistant insulating layer in sequence, and reaching the base material of the heat conduction tape 101. Because the heating wire 103 is evenly distributed in a serpentine shape inside the heat conduction tape 101, the heat is relatively evenly distributed in the width direction of the heat conduction tape 101. The temperature field on the surface of the heat conduction tape 101 is relatively uniform, and there will be no local overheating or local underheating. Finally, the heat conduction tape 101 conducts heat to its outer surface, heating and melting the ice and snow it contacts.

[0047] In practical applications, a temperature sensor can be installed on the surface of the heat conduction cable 101 or the sheath layer 6. The sensor monitors the temperature in real time and transmits the signal to the controller. When the external climate changes, such as rain or snow, and the monitored temperature is lower than the preset start threshold, the controller determines that there is a risk of icing. At this time, the power supply of the heating wire 103 can be turned on to start heating. When the temperature rises to the stop threshold, the controller cuts off the power supply to stop heating. This cycle keeps the surface temperature of the heat conduction cable 101 above the freezing point, thereby avoiding icing or snow accumulation.

[0048] The anti-icing and snow protection component is equipped with several binding and positioning components for fixing the relative position of the anti-icing and snow protection component and the sheath layer 6. The binding and positioning components include elastic clips 201 and fasteners 203, and the fasteners 203 are preferably fastening screws, such as... Figure 1 , Figure 5 As shown, several elastic clips 201 are arranged at intervals on the heat conduction cable 101. The elastic clips 201 are adapted to the shape of the heat conduction cable 101. Each elastic clip 201 has a connecting piece 202 fixedly installed at both ends. The two connecting pieces 202 on the elastic clip 201 are arranged overlappingly. Each pair of overlapping connecting pieces 202 are connected together by fasteners 203. Several anti-slip grooves 204 are provided at intervals on the inner side of each elastic clip 201 where it contacts the heat conduction cable 101, in order to suppress the relative sliding between the elastic clip 201 and the heat conduction cable 101.

[0049] During installation, first wrap the upper half of the outer periphery of the sheath layer 6 with the heat conduction tape 101. Then, put the elastic clip 201 on the outside of the heat conduction tape 101 and adjust the position of the elastic clip 201 so that the inner side of the elastic clip 201 is in contact with the outer surface of the heat conduction tape 101. Then, overlap the connecting pieces 202 at both ends of the elastic clip 201 to clamp the heat conduction tape 101. At this time, the two connecting pieces 202 are in an overlapping state. Then, install the fastener 203 and tighten the fastener 203 to press the heat conduction tape 101 onto the surface of the sheath layer 6. When disassembling later, loosen the fastener 203 to easily remove the elastic clip 201.

[0050] The stranded conductor 1 consists of a central monofilament 301 and a profiled conductor layer disposed outside the central monofilament 301, such as... Figure 6 As shown, the cross-section of the central monofilament 301 is circular. The circular central monofilament 301 provides a stable and easy-to-position foundation for the stranding of the outer profile monofilaments 302. The profile conductor layer is formed by multiple profile monofilaments 302 arranged and stranded around the central monofilament 301. The cross-section of the profile monofilaments 302 is irregular, which can be trapezoidal, Z-shaped, S-shaped or tile-shaped. Each profile monofilament 302 has a protrusion 303 on one side and a groove 304 that matches the protrusion 303 on the other side. When adjacent profile monofilaments 302 are stranded, the protrusion 303 of the latter monofilament is embedded in the groove 304 of the former monofilament to form a radial lock.

[0051] During the stranding process, multiple profiled single wires 302 are stranded around the central single wire 301. When adjacent profiled single wires 302 are stranded, the protrusion 303 of the later single wire is embedded into the groove 304 of the previous single wire. This interlocking forms a radial locking, that is, adjacent single wires form an interlocking structure in the radial direction. After stranding is completed, the conductor also needs to undergo a compaction process. Compaction makes the single wires fit together more tightly.

[0052] A mechanical interlocking structure is formed by the interlocking of the protrusions 303 and grooves 304 of the adjacent single wires 302. When the conductor is under tension, there will be no relative slippage between the single wires, and the conductor has good integrity. When the cable is bent or subjected to external pressure, the interlocking structure can keep the relative position of each single wire unchanged and the shape of the conductor is well maintained.

[0053] When installing the heat conduction cable 101, first wrap the heat conduction cable 101 around the outer periphery of the upper half of the sheath layer 6, then put the elastic clip 201 on the outside of the heat conduction cable 101, adjust the position of the elastic clip 201 so that the inner side of the elastic clip 201 is in contact with the outer surface of the heat conduction cable 101, then overlap the connecting pieces 202 at both ends of the elastic clip 201, and clamp the heat conduction cable 101 by setting the elastic clip 201. At this time, the two connecting pieces 202 are in an overlapping state. Then install the fastener 203 and tighten the fastener 203 to press the heat conduction cable 101 onto the surface of the sheath layer 6.

[0054] During operation, a temperature sensor can be installed on the surface of the heating cable 101 or the sheath layer 6. The sensor monitors the temperature in real time and transmits the signal to the controller. When the external climate changes, such as rain or snow, and the monitored temperature is lower than the preset start-up threshold, the controller determines that there is a risk of icing or that ice or snow has already formed on the cable surface. At this time, the power supply to the heating wire 103 can be turned on to start heating. After the power is turned on, current flows through the heating wire. The heating wire has a certain resistance value, and Joule heating is generated when the current flows through it. The amount of heat generated depends on the square of the current, the resistance value, and the energizing time. The heat is transferred outward from the heating wire, passing through the protective layer and the wear-resistant insulation layer in sequence. The base material of the heat-conducting heating cable 101 has a relatively uniform heat distribution in the width direction of the cable 101 due to the serpentine distribution of the heating wire 103 inside the cable 101. The temperature field on the surface of the cable 101 is relatively uniform, and there will be no local overheating or local underheating. Finally, the heat-conducting cable 101 conducts heat to its outer surface to heat and melt the ice and snow it contacts. When the temperature rises to the stop threshold, the controller cuts off the power to stop heating. This cycle keeps the surface temperature of the heat-conducting cable 101 above the freezing point. It can not only melt the ice or snow that has been formed, but also prevent ice or snow from forming to a certain extent.

[0055] As the surface temperature of the heat-conducting tape 101 rises, the ice and snow in contact with it begin to absorb heat and melt. The melted water flows away along the arc-shaped structure at the end of the heat-conducting tape 101, preventing it from stagnating on the cable surface. This guides the melted ice water down the end of the heat-conducting tape 101, preventing secondary freezing at the bottom of the cable. At the same time, the protrusions 102 on the surface of the heat-conducting tape 101 assist in breaking the ice. Stress concentration occurs at the protrusions 102, which disrupts the continuity of the ice layer, making it easier for the ice layer to break into smaller pieces. These smaller pieces of ice are more likely to fall off under the influence of gravity or wind than a whole ice layer.

[0056] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A medium-voltage aluminum alloy overhead insulated cable, comprising a stranded conductor (1), wherein the stranded conductor (1) is sequentially covered with a shielding layer (2), a cross-linked polyethylene insulation layer (3), and a wrapping tape layer (4), characterized in that, Also includes: The suspension wire (5) is arranged in parallel with the stranded conductor (1). Both the suspension wire (5) and the wrapping layer (4) are covered with a sheath layer (6). The sheath layer (6) outside the suspension wire (5) and the sheath layer (6) outside the wrapping layer (4) are a whole. The anti-ice and snow protection component includes a heat conduction tape (101) and a heating mechanism. The heat conduction tape (101) is disposed outside the sheath layer (6), and the heating mechanism is disposed inside the heat conduction tape (101) to resist the adhesion of ice and snow and accelerate the melting of ice and snow falling onto the anti-ice and snow protection component. Binding and positioning components are provided on the anti-icing and snow protection component, which are used to fix the relative position of the anti-icing and snow protection component and the sheath layer (6).

2. The medium-voltage aluminum alloy overhead insulated cable according to claim 1, characterized in that, The heating mechanism include: The conductive heat line (101) wraps around the outer periphery of the upper half of the sheath layer (6), and the end of the conductive heat line (101) is set as an arc structure and tilted away from the sheath layer (6) to guide the direction of water flow. A heating component is provided inside the conductive heat line (101) to accelerate the melting of ice and snow accumulated on the conductive heat line (101).

3. A medium-voltage aluminum alloy overhead insulated cable according to claim 2, characterized in that, The conductive heat line (101) has several protruding ridges (102) arranged at intervals along its length to accelerate the breaking and shedding of ice and snow on the conductive heat line (101).

4. A medium-voltage aluminum alloy overhead insulated cable according to claim 2, characterized in that, The heating component includes a heating wire (103), which is embedded in the heat-conducting tape (101) in a serpentine shape and is continuously arranged along the length of the heat-conducting tape (101). The heating wire (103) is composed of a heating wire and a protective layer and a wear-resistant insulating layer that are sequentially wrapped from the inside to the outside. Both ends of the heating wire (103) are located outside the heating tape (101). Both ends of the heating wire (103) are respectively fitted with sealing sleeves (104), and the sealing sleeves (104) are sealed on the heating tape (101). The two ends of the heating wire (103) are electrically connected to the live wire and the neutral wire of the power supply, respectively.

5. A medium-voltage aluminum alloy overhead insulated cable according to claim 1, characterized in that, The binding positioning component includes: An elastic clip (201) is provided, and several elastic clips (201) are arranged at intervals on the conductive tape (101). The elastic clips (201) are adapted to the shape of the conductive tape (101). Each elastic clip (201) has a connecting piece (202) fixedly provided at both ends. The two connecting pieces (202) on the elastic clip (201) are arranged overlappingly. Fasteners (203) are used to connect two overlapping connecting pieces (202) together.

6. A medium-voltage aluminum alloy overhead insulated cable according to claim 5, characterized in that, Each of the elastic clips (201) has a number of anti-slip grooves (204) spaced apart at the position where it contacts the conductive tape (101) to suppress the relative sliding between the elastic clip (201) and the conductive tape (101).

7. A medium-voltage aluminum alloy overhead insulated cable according to claim 6, characterized in that, The stranded conductor (1) consists of a central monofilament (301) and a profiled conductor layer disposed outside the central monofilament (301), wherein the cross-section of the central monofilament (301) is circular; The profile conductor layer is formed by multiple profile monofilaments (302) arranged and twisted around the central monofilament (301), and the cross-section of the profile monofilament (302) is irregular.

8. A medium-voltage aluminum alloy overhead insulated cable according to claim 7, characterized in that, Each of the profiled monofilaments (302) has a protrusion (303) on one side and a groove (304) that matches the protrusion (303) on the other side. When adjacent profiled monofilaments (302) are twisted together, the protrusion (303) of the latter monofilament is embedded in the groove (304) of the former monofilament to form a radial lock.

Images