A bundled aerial insulated cable

Abstract

The present application relates to the technical field of cable, and proposes a bundled overhead insulated cable, which comprises a plurality of wires, the wire comprises a conductor and a cross-linked polyethylene insulation sheath, the cross-linked polyethylene insulation sheath is wrapped outside the conductor, and the cable further comprises a splicing seat and a mounting ring, the splicing seat and the wire are one-to-one corresponding, the splicing seat is provided with a splicing structure to realize the splicing of two splicing seats, the splicing structure comprises a connecting head, a limiting block and a clasp, the connecting head is fixedly arranged at one end of the splicing seat, the other end of the splicing seat is provided with a connecting port for the connecting head to enter, the two adjacent splicing seats can rotate relative to each other, the splicing seat is provided with a locking piece to fix the two splicing seats, and the mounting ring is fixedly arranged on the splicing seat, the wire is located in the interior of the mounting ring, and the mounting ring is the splicing structure. Through the above technical scheme, the problem that the number of bundled cable in the prior art is difficult to flexibly control, the replacement cost is high, and the efficiency is low is solved.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and more specifically, to a bundled overhead insulated cable. Background Technology

[0002] Bundled overhead insulated cables are widely used in overhead transmission lines in urban and rural power grid transformation, low-voltage power distribution systems and rural power grids. These cables are usually composed of multiple insulated cores assembled in a certain structural manner, and have the advantages of convenient laying, small space occupation, low line loss and high power supply reliability.

[0003] In practical applications, depending on different power loads, power supply distances, and line planning, construction personnel need to select bundled cables with different core counts (such as two-core, four-core, etc.) to meet specific engineering requirements. Currently, common bundled overhead insulated cables mainly adopt an integrated molding or bundling structure. That is, during the cable manufacturing process, multiple insulated cores are wrapped or connected in a fixed arrangement at one time through extrusion; or multiple independent insulated cables are arranged neatly according to the required number, and then fasteners such as cable ties, binding wires, or fixing clips are used to manually bundle and fix them at certain intervals along the length of the cable, thereby temporarily or semi-permanently forming a bundled state.

[0004] However, the aforementioned existing technologies suffer from poor flexibility and difficulty in adapting to changes in on-site requirements in practical applications. For bundled cables with integrated molding structures, the number of cores is fixed at the factory (e.g., two cores, four cores, etc.), making it difficult to flexibly increase or decrease the number of cores according to the actual needs of the construction site. When the load changes or the line capacity needs to be adjusted, the entire cable must be replaced, which not only wastes materials but also increases construction costs and difficulty. For temporary bundling methods using cable ties or binding wires, although theoretically any number of cables can be selected for combination, the fixing process relies entirely on manual operation, which is inefficient and makes it difficult to ensure the consistency of bundling spacing and tightness. More importantly, when it is necessary to repair, replace, or rearrange one of the cables, all cable ties must be cut or fasteners loosened, which is cumbersome, easily damages the insulation layer of other cables, and makes it difficult to restore the original bundled state when re-bundling. Summary of the Invention

[0005] This invention proposes a bundled overhead insulated cable to solve the problems of difficulty in flexibly controlling the number of cables in existing integrally formed and bundled bundled cables, as well as high replacement costs and low efficiency.

[0006] The technical solution of the present invention is as follows: A bundled overhead insulated cable includes multiple conductors, each conductor comprising a conductor and a cross-linked polyethylene (XLPE) insulating sheath, the XLPE insulating sheath wrapping around the conductor, and further comprising: A splicing base, wherein each splicing base corresponds one-to-one with a wire, and a splicing structure is provided on the splicing base to enable splicing of two splicing bases, the splicing structure comprising: The connector is fixedly mounted at one end of the splicing base, and the other end of the splicing base has a connection port for the connector to enter. The end of the connector is a protruding ring shape. A limiting block is slidably disposed on the splicing base. The limiting block can limit the end of the connector and restrict it to the inside of the connection port. When the limiting block limits the connector, the outer side of the limiting block and the outer side of the splicing base are adapted to each other. A retaining ring is movably disposed outside the splicing base, and the retaining ring contacts the outer side of the limiting block to lock the position of the limiting block; Two adjacent splicing seats are rotatable relative to each other. Each splicing seat is provided with a locking element to secure the two splicing seats. The locking element includes: A fixing ring, wherein the fixing ring is fixedly fitted onto both ends of the splicing base; The fixing clamp has a fixing groove for limiting the two fixing rings of two adjacent splicing seats to move closer to each other, and the fixing clamp is threaded with a locking bolt for locking the fixing rings. A mounting ring, fixedly mounted on the splicing base, with the wire located inside the mounting ring, the mounting ring being a splicing structure, the mounting ring comprising: A fixed half-ring is fixedly connected to the splicing base; The detachable half-ring is detachably connected to the fixed half-ring via a quick-release component, the quick-release component comprising: A fixing block is fixedly disposed at the end of the disassembly and assembly half-ring; A connecting block, which is fixedly disposed at the end of the fixed half-ring; An insert rod passes through the fixing block, and a push plate is fixedly connected to the end of the insert rod. A return spring is connected between the push plate and the fixing block. A locking block is fixedly disposed at the end of the insertion rod. The fixing block has an opening for the locking block to pass through and a slot that matches the locking block. When the locking block is located inside the slot, the fixing block and the connecting block can be connected.

[0007] To enable the movement of the retaining ring, an adjusting screw is rotatably mounted on the splicing base, and the adjusting screw is threadedly connected to the retaining ring.

[0008] To facilitate the disassembly of the limiting block, a bent disassembly opening is provided on the limiting block.

[0009] The working principle and beneficial effects of this invention are as follows: 1. In this invention, the connector can be limited by the limiting block, and the two splicing seats can be spliced ​​together. The limiting block is locked by the retaining ring to ensure the limiting of the connector. The two splicing seats can rotate relative to each other, thereby adjusting the angle of the mounting ring, that is, adjusting the position of multiple wires. The number of cables can be flexibly changed by splicing the splicing seats, thereby meeting different engineering needs.

[0010] 2. In this invention, the insertion rod drives the card block to rotate, so that the position of the card block and the card slot or through-hole correspond, thereby enabling the locking and unlocking of the mounting ring, realizing the quick assembly and disassembly of the mounting ring, and enabling the wire to be removed from the inside of the mounting ring. This allows for the replacement of a single damaged wire, reducing maintenance costs and shortening replacement time. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the planar structure of the present invention; Figure 3 This is a schematic diagram of the splicing base, splicing structure, and mounting ring of the present invention; Figure 4 This is a partial cross-sectional structural diagram of the splicing base, splicing structure, and mounting ring of the present invention; Figure 5 This is a partial cross-sectional structural schematic diagram of the splicing base and splicing structure of the present invention; Figure 6 This is a schematic diagram of the splicing base, connector, and fixing ring of the present invention; Figure 7 This is a first-view structural schematic diagram of the mounting ring and quick-release component of the present invention. Figure 8 This is a second-view structural schematic diagram of the mounting ring and quick-release component of the present invention; Figure 9 For the present invention Figure 1 A magnified schematic diagram of the local structure at point A; Figure 10 For the present invention Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0013] In the picture: 1. Splicing base; 101. Conductor; 102. Cross-linked polyethylene insulating sheath; 201. Connector; 202. Limiting block; 203. Snap ring; 204. Adjusting screw; 301. Retaining ring; 302. Retaining clamp; 303. Locking bolt; 401. Fix the half-ring; 402. Disassemble and assemble the half-ring; 501. Fixing block; 502. Connecting block; 503. Insert rod; 504. Locking block; 505. Return spring; 506. Push plate. Detailed Implementation

[0014] 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.

[0015] like Figures 1 to 10 As shown, this embodiment proposes a bundled overhead insulated cable, which includes multiple conductors. Each conductor includes a conductor 101 and a cross-linked polyethylene insulation sheath 102. The cross-linked polyethylene insulation sheath 102 wraps around the outside of the conductor 101. It also includes a splicing base 1 and a mounting ring.

[0016] Traditional overhead insulated cables mostly use ordinary cross-linked polyethylene for their outer sheaths. Although it has good insulation performance and heat resistance, it has the following shortcomings in long-term outdoor use: poor resistance to environmental stress cracking, limited resistance to ultraviolet aging, low flame retardant rating, and it is prone to wear when in long-term contact and friction with the detachable limiting ring. Therefore, this embodiment improves the cross-linked polyethylene outer sheath material as follows. The improved outer sheath material formula (by mass parts) is as follows: Base material: 100 parts of cross-linked polyethylene (XLPE); Modifier: 15-25 parts of ethylene-vinyl acetate copolymer; Anti-aging agent: 0.5-1.0 parts of composite antioxidant; Light stabilizer: 0.3-0.8 parts of hindered amine light stabilizer; Flame retardant: 30-50 parts of magnesium hydroxide (surface modified with silane); Abrasion-resistant modifier: 5-10 parts of ultra-high molecular weight polyethylene; Colorant: 2-5 parts of carbon black masterbatch (for UV resistance); Among them, the hindered amine light stabilizer and carbon black work synergistically to significantly improve UV aging resistance. With its enhanced chemical resistance, it is suitable for long-term outdoor overhead installation. The addition of ultra-high molecular weight polyethylene improves the surface lubricity of the sheath and reduces the coefficient of friction, making it less prone to wear during repeated disassembly and assembly with the limiting ring. Silane-modified magnesium hydroxide ensures environmental protection and halogen-free operation while improving the flame retardant rating of the material, meeting the safety requirements of overhead lines. The introduction of ethylene-vinyl acetate copolymer improves the flexibility and crack resistance of the material, adapting to outdoor environments with large temperature variations, thus meeting the long-term use needs of overhead insulated cables under various complex working conditions.

[0017] like Figures 1 to 6 As shown, each splicing base 1 corresponds one-to-one with a wire. The splicing base 1 is equipped with a splicing structure to allow two splicing bases 1 to be joined. The splicing structure includes a connector 201, a limiting block 202, and a retaining ring 203. The connector 201 is fixedly mounted at one end of the splicing base 1, and the other end of the splicing base 1 has a connection port for the connector 201 to enter. The end of the connector 201 is a protruding annular shape. The limiting block 202 is slidably mounted on the splicing base 1. The splicing base 1 has a groove that communicates with the connection port. The limiting block 202 is slidably installed inside the groove, and can limit the end of the connector 201. Confined inside the connection port, when the limiting block 202 limits the connector 201, the outer side of the limiting block 202 and the outer side of the splicing seat 1 are adapted. To facilitate the disassembly of the limiting block 202, a bent disassembly port is provided on the limiting block 202. The retaining ring 203 is movably disposed outside the splicing seat 1. An adjusting screw 204 is rotatably disposed on the splicing seat 1. The adjusting screw 204 and the retaining ring 203 are threadedly connected. The contact between the retaining ring 203 and the outer side of the limiting block 202 can lock the position of the limiting block 202. A knob is fixedly connected to the end of the adjusting screw 204. A groove is provided on the splicing seat 1 to provide rotation space for the knob.

[0018] Select an appropriate number of wires according to usage requirements, and select the corresponding number of splicing seats 1. Initially, the limiting block 202 is located inside the slide groove and away from the connection port, and the retaining ring 203 is located away from the limiting block 202. Insert the connector 201 into the connection port of another splicing seat 1, and push the limiting block 202 inward to make it fit tightly against the connector 201. The limiting block 202 limits the protruding end of the connector 201, restricting the connector 201 inside the connection port and allowing it to rotate. This allows adjustment of the angle between the two splicing seats 1, that is, adjustment of the position of the wires corresponding to the splicing seat 1. When the limiting block 202 and the connector 201 are tightly fitted, its exterior and the splicing seat 1... When the external adapter is connected, rotating the adjusting screw 204 causes the retaining ring 203 to move towards the limiting block 202. The retaining ring 203 and the limiting block 202 make external contact, thereby fixing the limiting block 202 inside the slide groove. This allows the limiting block 202 to stably limit the connector 201, ensuring a stable connection between the two splicing seats 1 with an adjustable angle. When the two splicing seats 1 need to be disassembled, rotating the adjusting screw 204 in the opposite direction causes the retaining ring 203 to disengage from the limiting block 202. By inserting a finger or tool into the bent disassembly port, the limiting block 202 can be slid outward from inside the slide groove, releasing the limiting of the connector 201. This allows the connector 201 to be pulled out from inside the connection port, thus enabling the disassembly of the two splicing seats 1.

[0019] Two adjacent splicing seats 1 can rotate relative to each other. The splicing seats 1 are equipped with locking components to fix the two splicing seats 1. The locking components include a fixing ring 301 and a fixing clamp 302. The fixing ring 301 is fixedly fitted on both ends of the splicing seat 1. The fixing clamp 302 has a fixing groove for limiting the two fixing rings 301 of the two adjacent splicing seats 1 to move closer to each other. The fixing clamp 302 is threaded with a locking bolt 303 for locking the fixing ring 301. After the two splicing seats 1 are spliced, the connector 201 can rotate inside the connection port to adjust the angle between the two splicing seats 1. After the adjustment is completed, the fixing clamp 302 is put on the outside of the two fixing rings 301, and the locking bolt 303 is tightened to press the two fixing rings 301 on the surface of the fixing rings 301 to limit the two fixing rings 301. The end face of the fixing ring 301 is provided with anti-slip texture to enhance the friction, thereby locking the position between the two splicing seats 1, that is, locking the position between the two wires.

[0020] like Figures 3 to 9As shown, the mounting ring is fixedly mounted on the splicing base 1, with the wire located inside the mounting ring. The mounting ring is a splicing structure, comprising a fixed half-ring 401 and a detachable half-ring 402. The fixed half-ring 401 is fixedly connected to the splicing base 1, and the detachable half-ring 402 is detachably connected to the fixed half-ring 401 via quick-release components. The quick-release components include a fixing block 501, a connecting block 502, a plug rod 503, and a locking block 504. The fixing block 501 is fixedly mounted at the end of the detachable half-ring 402, and the connecting block 502... The insertion rod 503 is fixedly installed at the end of the fixed half ring 401, and passes through the fixed block 501. The end of the insertion rod 503 is fixedly connected to the push plate 506. A return spring 505 is connected between the push plate 506 and the fixed block 501. The locking block 504 is fixedly installed at the end of the insertion rod 503. The fixed block 501 has an opening for the locking block 504 to pass through and a slot that matches the locking block 504. When the locking block 504 is located inside the slot, the fixed block 501 and the connecting block 502 can be connected.

[0021] The disassembly half-ring 402 and the fixed half-ring 401 are spliced ​​together to form a complete ring, guiding and limiting the wires, so that the wires are installed on the splicing base 1, thereby forming a bundle of multiple wires. Under the action of the return spring 505, the insertion rod 503 drives the locking block 504 to press tightly inside the slot, so that the connecting block 502 and the fixing block 501 fit together to ensure a stable connection between the disassembly half-ring 402 and the fixed half-ring 401, preventing the wires from coming out of the mounting ring. When the wire is damaged and needs to be replaced, the push plate 506 can be pushed to push the locking block 504 out of the slot, and then rotated at a certain angle so that the locking block 504 is aligned with the through-hole. The locking block 504 and the insertion rod 503 can be moved out of the connecting block 502 through the through-hole, releasing the connection between the connecting block 502 and the fixing block 501, and the disassembly half-ring 402 can be removed from the fixed half-ring 401. The wire is removed from the inside of the mounting ring and can be replaced. After replacement, the disassembly half-ring 402 and the fixed half-ring 401 are pressed together. The insertion rod 503 and the locking block 504 pass through the through-hole. The insertion rod 503 is pushed so that the locking block 504 protrudes from the connecting block 502. The insertion rod 503 and the locking block 504 are rotated so that the locking block 504 corresponds to the position of the slot. The push plate 506 is released, and the locking block 504 is locked into the slot under the action of the return spring 505. The disassembly half-ring 402 and the fixed half-ring 401 are connected. When the return spring 505 is not subjected to external force, the angle of the locking block 504 corresponds to the slot. When the connecting block 502 is unlocked, the insertion rod 503 rotates. The elasticity of the return spring 505 can adapt to this small-amplitude rotation. After the rotation disassembly or installation is completed, the return spring 505 and the locking block 504 return to the normal angle.

[0022] The working principle or usage process of this bundled overhead insulated cable is as follows: Select an appropriate number of wires according to the usage requirements, and select the corresponding number of splicing bases 1 according to the number of wires. Insert the connector 201 into the connection port of another splicing base 1. The limiting block 202 limits the connector 201. The adjusting screw 204 drives the retaining ring 203 to move and limit the limiting block 202, ensuring that the connection between the two splicing bases 1 is stable and the angle is adjustable. Place the wire between the fixed half-ring 401 and the disassembly half-ring 402. Rotate the insert rod 503 and the locking block 504 through the push plate 506 to make it pass through the through and protrude from the connecting block 502. Rotate the push plate 506 back to the original angle so that the locking block 504 and the slot angle correspond. Release the push plate 506 to let the locking block 504 enter the slot to connect the disassembly half-ring 402 and the fixed half-ring 401, and confine the wire inside the mounting ring to install it on the splicing base 1. Adjust the angle between multiple splicing seats 1 to adjust the position and shape of the wires. After the adjustment is completed, put the fixing clip 302 on the outside of the two fixing rings 301, tighten the locking bolt 303 to press it on the surface of the fixing rings 301 to lock the two fixing rings 301. When it is necessary to reduce the number of wires, rotate the adjusting screw 204 in the opposite direction to disengage the retaining ring 203 from the limiting block 202, slide the limiting block 202 from the inside of the slide groove to the outside, release the limitation on the connector 201, so that the connector 201 can be pulled out from the inside of the connector, thereby disassembling the two splicing bases 1 and removing the wires installed on the splicing base 1. When the wire needs to be replaced, the disassembly half-ring 402 can be disassembled and the new wire installed between the disassembly half-ring 402 and the fixed half-ring 401.

[0023] 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 bundled overhead insulated cable, comprising multiple conductors, each conductor including a conductor (101) and a cross-linked polyethylene (XLPE) insulating sheath (102), the XLPE insulating sheath (102) wrapping around the conductor (101), characterized in that, Also includes: Splicing base (1), the splicing base (1) and the wire correspond one to one, and the splicing base (1) is provided with a splicing structure to realize the splicing of two splicing bases (1); The two adjacent splicing seats (1) can rotate relative to each other, and the splicing seats (1) are provided with locking members to fix the two splicing seats (1). The mounting ring is fixedly mounted on the splicing base (1), and the wire is located inside the mounting ring. The mounting ring is a splicing structure.

2. A bundled overhead insulated cable according to claim 1, characterized in that, The splicing structure includes: Connector (201), the connector (201) is fixedly disposed at one end of the splicing base (1), and the other end of the splicing base (1) is provided with a connection port for the connector (201) to enter. The end of the connector (201) is a protruding ring shape. A limiting block (202) is slidably disposed on the splicing base (1). The limiting block (202) can limit the end of the connector (201) and restrict it inside the connection port. When the limiting block (202) limits the connector (201), the outer side of the limiting block (202) is adapted to the outer side of the splicing base (1). A retaining ring (203) is movably disposed outside the splicing base (1). The retaining ring (203) and the outer side of the limiting block (202) are in contact to lock the position of the limiting block (202).

3. A bundled overhead insulated cable according to claim 1, characterized in that, The locking element includes: A fixing ring (301) is fixedly fitted onto both ends of the splicing base (1); The fixing clamp (302) has a fixing groove for limiting the two fixing rings (301) of the two adjacent splicing seats (1) to move closer to each other. The fixing clamp (302) is threaded with a locking bolt (303) for locking the fixing ring (301).

4. A bundled overhead insulated cable according to claim 1, characterized in that, The mounting ring includes: A fixed half-ring (401) is fixedly connected to the splicing base (1); The disassembly and assembly half ring (402) is detachably connected to the fixed half ring (401) via a quick-release component.

5. A bundled overhead insulated cable according to claim 4, characterized in that, The quick-release component includes: A fixing block (501) is fixedly disposed at the end of the disassembly and assembly half ring (402); A connecting block (502) is fixedly disposed at the end of the fixed half-ring (401); Insert rod (503), the insert rod (503) passes through the fixing block (501), the end of the insert rod (503) is fixedly connected to a push plate (506), and a return spring (505) is connected between the push plate (506) and the fixing block (501). The card block (504) is fixedly disposed at the end of the insertion rod (503). The fixing block (501) has an opening for the card block (504) to pass through and a slot that matches the card block (504). When the card block (504) is located inside the slot, the fixing block (501) and the connecting block (502) can be connected.

6. A bundled overhead insulated cable according to claim 2, characterized in that, An adjusting screw (204) is rotatably mounted on the splicing base (1), and the adjusting screw (204) and the retaining ring (203) are threadedly connected.

7. A bundled overhead insulated cable according to claim 2, characterized in that, The limiting block (202) has a bent disassembly port.

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