A high-toughness cross-linked polyethylene aluminum alloy cable

Abstract

This invention relates to the field of power cable technology and proposes a high-toughness cross-linked polyethylene aluminum alloy cable, comprising a protective sheath, filler sand, wrapping steel wire, and a traction mechanism. The protective sheath wraps around the outside of the insulation layer, the filler sand is filled between the protective sheath and the insulation layer, and the wrapping steel wire is spirally wound around the outside of the insulation layer, positioned between the protective sheath and the insulation layer. The filler sand is positioned in the gaps of the spirally wound steel wire. When the wrapping steel wire bends, the filler sand is compressed and can creep within the protective sheath. The traction mechanism is detachably mounted on the protective sheath. When the cable bends, the traction wire can pull the cable within the inner loop of the bend. The traction mechanism is used to pull the bent portion of the cable after bending. This technical solution addresses the problem in the prior art where aluminum alloy cables are subject to small-angle bending and repeated bending under compression.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, and more specifically, to a high-toughness cross-linked polyethylene aluminum alloy cable. Background Technology

[0002] Aluminum alloy cables use aluminum alloy as the conductor material, and their outer insulation layer is generally made of cross-linked polyethylene. Due to the superior performance of cross-linked polyethylene, it is widely used as an insulation layer to directly wrap the conductor, providing insulation while also playing a role in mechanical protection, moisture prevention, and corrosion prevention. The insulation layer of cross-linked polyethylene has good flexibility. The overall toughness of aluminum alloy cables still depends on the aluminum alloy conductor. The toughness of the cable is mainly reflected in the cable material's ability to deform and absorb energy when subjected to a certain load, thus resisting breakage.

[0003] Compared to pure aluminum, aluminum alloy conductors in aluminum alloy cables have stronger and more stable toughness and creep resistance. However, when aluminum alloy cables are repeatedly bent at the same location or bent at a small angle, the aluminum alloy conductors are prone to fatigue fracture. Therefore, there is a need for an aluminum alloy cable that can physically limit its minimum bending radius and effectively maintain this shape after unavoidable bending, thereby reducing the risk of repeated bending stress at the same location. Summary of the Invention

[0004] This invention proposes a high-toughness cross-linked polyethylene aluminum alloy cable to solve the problem that aluminum alloy cables in the prior art are prone to small-angle bending and repeated bending under compression.

[0005] The technical solution of the present invention is as follows: A high-toughness cross-linked polyethylene aluminum alloy cable includes conductors and an insulation layer, the insulation layer wrapping around multiple conductors. It also includes a protective sheath, filler sand, wrapping steel wires, and a traction mechanism. The protective sheath wraps around the insulation layer, the filler sand is filled between the protective sheath and the insulation layer, and the wrapping steel wires are spirally wound around the insulation layer. The filler sand is disposed in the gaps between the spiral wrapping steel wires. When the wrapping steel wires bend, the filler sand is compressed and can creep within the protective sheath. The traction mechanism is detachably mounted on the protective sheath and has multiple traction wires arranged circumferentially around the protective sheath. When the cable bends, the traction wires can pull the cable within the inner loop of the bend. The traction mechanism is used to pull the bent portion of the cable after bending. The gap between the wrapping steel wires at the inner loop position when the cable bends is defined as the inner loop gap, and the gap between the wrapping steel wires at the outer loop position is defined as the outer loop gap.

[0006] When the cable bends, the wrapping wires also bend along with the cable. During bending, the gap between the wrapping wires on the inner loop decreases, while the gap between the wrapping wires on the outer loop increases. By incorporating filler sand and wrapping wires, the cable cannot bend at small angles due to the squeezing action between the inner loops of the wrapping wires and the squeezing action of the filler sand. Simultaneously, the protective sleeve's tightening effect on the filler sand and wrapping wires also supports the cable, preventing excessively small rotation angles.

[0007] The spiral-shaped wrapped steel wire can also be replaced with steel rings that are fixedly connected to the protective sleeve at equal intervals. When the cable is bent, the spacing between the inner and outer steel rings changes in the same way as the wrapped steel wire. The steel rings are stronger than the wrapped steel wire in resisting shear force. However, the wrapped steel wire can increase the tensile strength of the cable in the axial direction. It can be used according to the actual use environment.

[0008] When the gap between the wrapping steel wires decreases, the filling sand in the gap is squeezed; when the gap between the wrapping steel wires increases, the filling sand flows into the increased gap.

[0009] The traction mechanism includes fastening rings and wire clamps. Multiple fastening rings are detachably sleeved on the protective sleeve at equal intervals. Multiple wire clamps are fixedly connected to the fastening rings and are arranged circumferentially on the fastening rings. The two ends of the traction wire are respectively connected to the wire clamps on two of the fastening rings.

[0010] A winding component is fixedly connected to the wire clamp. One end of the traction wire passes through the wire clamp and is connected to the winding component, while the other end is fixedly connected to the wire clamp on another fastening ring.

[0011] The adjacent fastening rings are staggered, and the wire clamps on the adjacent fastening rings are staggered. A fastening ring is provided between the two fastening rings that connect the two ends of the traction wire. When the cable is straight, the traction wire is parallel to the cable. When the cable is bent, the traction wire in the bent position is shortened by the winding component.

[0012] The working principle and beneficial effects of this invention are as follows: 1. The present invention includes a wrapping steel wire, which enhances the overall tensile strength of the cable and, together with the protective sheath, serves as the outer armor layer of the cable to enhance its shear resistance. By adding filler sand between the wrapping steel wires, the filler sand supports the wrapping steel wires in the inner ring when the cable bends, preventing the cable from bending at a small angle. At the same time, the filler sand enters the gap between the wrapping steel wires in the outer ring, providing support when the cable recovers its bending angle, preventing the cable from returning to a straight shape, and reducing the possibility of the cable being squeezed and bent again in the original position. 2. In this invention, by setting traction wires, multiple traction wires are arranged around the outside of the protective sleeve. When the cable bends, the traction wires in the inner circle are stretched and shortened by the winding component, stretching the cable and making it difficult for it to return to straightness. At the same time, the steel wires in the outer circle are squeezed by the outer circle of the protective sleeve and will slide to a position close to the inner circle for traction, so that the bending angle of the cable is relatively fixed. 3. In this invention, by filling the protective sleeve with wrapping steel wire and filling sand, the cable is supported when bent to prevent the bending radius from being too small, and the outer ring is supported to reduce the angle at which the cable rebounds under its own elasticity. By setting up a traction mechanism, multiple traction wires stretch the cable when it is bent, preventing the cable from rebounding. The angle maintained after being squeezed is relatively fixed, reducing the possibility of being squeezed in the same position later. This reduces the number of times the cable is repeatedly bent in the same position, thereby improving the cable's resistance to deformation and its resistance to breakage. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure from another perspective in this invention; Figure 3 This is a partial structural diagram of the fastening ring locking plate in this invention; Figure 4 This is a partial structural diagram of the fastening ring traction wire in this invention; Figure 5 This is a partial internal cross-sectional view of the structure of the wrapped steel wire and the filling sand in this invention. Figure 6 This is a partial internal cross-sectional view of the structure of the combination of the wrapped steel wire and the filling sand in this invention from another perspective; Figure 7 This is a partial internal cross-sectional view of the structure in which the inner ring gap and the outer ring gap fit together in this invention.

[0015] In the diagram: 1. Conductor; 2. Insulation layer; 3. Protective sleeve; 4. Filler sand; 5. Wrapping steel wire; 6. Traction wire; 7. Fastening ring; 8. Wire clamp; 9. Winding component; 10. Inner ring gap; 11. Outer ring gap; 12. Locking plate; 13. Inner ring wire; 14. Outer ring wire. Detailed Implementation

[0016] 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.

[0017] like Figures 1-7 As shown, this embodiment proposes a high-toughness cross-linked polyethylene aluminum alloy cable, including conductors 1 and insulation layer 2. The insulation layer 2 wraps around multiple conductors 1. It also includes a protective sleeve 3, filler sand 4, wrapping steel wire 5, and a traction mechanism. The protective sleeve 3 wraps around the insulation layer 2, the filler sand 4 fills the space between the protective sleeve 3 and the insulation layer 2, and the wrapping steel wire 5 is spirally wound around the insulation layer 2. The filler sand 4 is disposed in the gaps of the spirally wound steel wire 5. When the wrapping steel wire 5 bends, the filler sand 4 is compressed and can creep within the protective sleeve 3. The traction mechanism is detachably mounted on the protective sleeve 3 and has multiple traction wires 6 arranged circumferentially around the protective sleeve 3. When the cable bends... The traction wire 6 can pull the cable in the inner loop of the cable bend. The traction mechanism is used to pull the bent part after the cable is bent. In this application, the wrapping steel wire 5 in the protective sleeve 3 provides protection for the cable itself. When the cable is bent, the gap between the wrapping steel wires 5 in the inner loop position is set as the inner loop gap 10, and the gap between the wrapping steel wires 5 in the outer loop position is set as the outer loop gap 11. The wrapping steel wire 5 squeezes the filling sand 4 in the inner loop gap 10, so that the cable cannot be bent at a small angle. The outer loop gap 11 increases as the cable bends, and the filling sand 4 enters the outer loop gap 11 to support the cable when it returns to a straight state, preventing it from returning to its original state. At the same time, the traction mechanism can make the cable bend at the bend position.

[0018] like Figures 1-7As shown, when the cable bends, the wrapping steel wires 5 also bend along with the cable. When bending, the gap between the wrapping steel wires 5 in the inner loop decreases, while the gap between the wrapping steel wires 5 in the outer loop increases. By setting the filling sand 4 and the wrapping steel wires 5, when the cable bends, due to the squeezing action between the inner loop positions of the wrapping steel wires 5 and the squeezing action of the filling sand 4, the cable cannot be bent at a small angle. At the same time, the tightening action of the protective sleeve 3 on the filling sand 4 and the wrapping steel wires 5 can also support the cable and prevent its rotation angle from being too small. When the gap between the wrapping steel wires 5 decreases, it will squeeze the filling sand 4 in the gap, and when the gap between the wrapping steel wires 5 increases, the filling sand 4 will flow into the increased gap.

[0019] The spiral-shaped wrapping steel wire 5 can also be replaced by steel rings that are fixedly connected to the protective sleeve 3 at equal intervals. When the cable is bent, the spacing of the inner and outer steel rings changes in the same way as the wrapping steel wire 5. The steel rings are stronger than the wrapping steel wire 5 in resisting shear force. However, the wrapping steel wire 5 can increase the tensile strength of the cable in the axial direction. It can be used according to the actual use environment.

[0020] like Figures 1-4 As shown, the traction mechanism includes fastening rings 7 and wire clamps 8. Multiple fastening rings 7 are detachably sleeved on the protective sleeve 3 at equal intervals. Multiple wire clamps 8 are fixedly connected to the fastening rings 7. The multiple wire clamps 8 are arranged circumferentially on the fastening rings 7. The two ends of the traction wire 6 are respectively connected to the wire clamps 8 on two fastening rings 7. In this embodiment, two wire clamps 8 are set on each fastening ring 7, facing each other. A locking piece 12 can be set on the fastening ring 7 to fix the end of the traction wire 6 at the end of the traction mechanism. After the traction wire 6 passes through the wire clamp 8 on the winding component 9, it is fixedly connected to the wire clamp 8 on another fastening ring 7.

[0021] like Figures 1-4 As shown, a winding component 9 is fixedly connected to the cable clamp 8. One end of the traction wire 6 passes through the cable clamp 8 and is connected to the winding component 9. The other end is fixedly connected to the cable clamp 8 on another fastening ring 7. Adjacent fastening rings 7 are staggered, and the cable clamps 8 on adjacent fastening rings 7 are staggered. A fastening ring 7 is provided between the two fastening rings 7 that connect the two ends of the traction wire 6. When the cable is straight, the traction wire 6 remains parallel to the cable. When the cable is bent, the traction wire 6 in the bent position is shortened by the winding component 9. The winding component 9 is provided with a winding wheel for winding the traction wire 6 and an elastic device for applying torque to the winding wheel, so that the winding wheel can only rotate in one direction.

[0022] When the cable bends, the fastening rings 7 at the bending position are close together. At this time, the inner coil wire 13 can be tightened by the winding component 9, while the outer coil wire 14 is squeezed by the protective sleeve 3 at the outer position, causing it to slide onto the protective sleeve 3 and get closer to the inner coil position. It is also tightened by the winding component 9. The fastening rings 7 connecting the two ends of the traction wire 6 are also provided between the fastening rings 7, which can make the force more even while maintaining the tension of the traction wire 6. Compared with the direct connection of multiple traction wires 6 to two adjacent fastening rings 7, the alternating extension of multiple traction wires 6 can make the force on the protective sleeve 3 more even. Moreover, when the cable bends, the inner coil wire 13 can be as close to the cable as possible to avoid affecting the movement of other equipment.

[0023] In this embodiment, when the cable is compressed, it bends. At this time, the wrapping wire 5 bends, and the inner wrapping wire 5 compresses the filling sand 4. The gap between different loops of the outer wrapping wire 5 increases, and the filling sand 4 flows into the increased gap, preventing the cable from springing back to a straight state. At the same time, the traction wire 6 moves to the bent inner loop, and the outer loop wire 14 slides on the protective sleeve 3 towards the inner loop. The inner loop wire 13 is stretched and shortened by the winding component 9, forming a stretch on the bending position of the cable, so that the bending arc of the cable is relatively fixed, reducing the bending amplitude when the same position is compressed again.

[0024] 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 high-toughness cross-linked polyethylene aluminum alloy cable, comprising conductors (1) and an insulation layer (2), said insulation layer (2) wrapping around a plurality of said conductors (1), characterized in that, Also includes: The protective sleeve (3) is wrapped around the outside of the insulating layer (2); Filler sand (4) is used to fill the space between the protective sleeve (3) and the insulating layer (2); A wrapping steel wire (5) is spirally wound around the outside of the insulation layer (2), and the wrapping steel wire (5) is disposed between the protective sleeve (3) and the insulation layer (2); The filling sand (4) is placed in the gap of the spiral wrapping steel wire (5). When the wrapping steel wire (5) bends, the filling sand (4) is squeezed and can move in the protective sleeve (3). The traction mechanism is detachably mounted on the protective sleeve (3). The traction mechanism is provided with multiple traction wires (6), which are arranged in a circle around the protective sleeve (3). When the cable is bent, the traction wires (6) can pull the cable in the inner circle of the cable bend. The traction mechanism is used to pull the bent part after the cable is bent.

2. The high-toughness cross-linked polyethylene aluminum alloy cable according to claim 1, characterized in that, When the cable bends, the wrapping wires (5) also bend along with the cable. When bending, the gap between the wrapping wires (5) in the inner bend decreases, while the gap between the wrapping wires (5) in the outer bend increases.

3. The high-toughness cross-linked polyethylene aluminum alloy cable according to claim 2, characterized in that, When the gap between the wrapping steel wires (5) decreases, it will squeeze the filling sand (4) in the gap. When the gap between the wrapping steel wires (5) increases, the filling sand (4) will flow into the increased gap.

4. The high-toughness cross-linked polyethylene aluminum alloy cable according to claim 1, characterized in that, The traction mechanism includes: Multiple fastening rings (7) are detachably fitted onto the protective sleeve (3) at equal intervals; Multiple wire clamps (8) are fixedly connected to the fastening ring (7), and the multiple wire clamps (8) are arranged in a circular pattern on the fastening ring (7); The two ends of the traction wire (6) are respectively connected to the through clamps (8) on the two fastening rings (7).

5. The high-toughness cross-linked polyethylene aluminum alloy cable according to claim 4, characterized in that, The adjacent fastening rings (7) are staggered, and the wire clamps (8) on the adjacent fastening rings (7) are staggered.

6. The high-toughness cross-linked polyethylene aluminum alloy cable according to claim 5, characterized in that, A winding component (9) is fixedly connected to the wire clamp (8). One end of the traction wire (6) passes through the wire clamp (8) and is connected to the winding component (9), while the other end is fixedly connected to the wire clamp (8) on another fastening ring (7).

7. A high-toughness cross-linked polyethylene aluminum alloy cable according to claim 6, characterized in that, The fastening ring (7) is provided between the two fastening rings (7) that connect the two ends of the traction wire (6).

8. A high-toughness cross-linked polyethylene aluminum alloy cable according to claim 7, characterized in that, When the cable is straight, the traction wire (6) remains parallel to the cable. When the cable is bent, the traction wire (6) in the bent position is shortened by the winding component (9).

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