Parallel bundled overhead crosslinked polyethylene insulated cable

Abstract

This utility model discloses a parallel-bundled overhead cross-linked polyethylene insulated cable, comprising several parallel-distributed conductors, each conductor being covered by an integrally formed insulating sheath. Several drainage connection grooves are formed on the central surface of the insulating sheath. Some of these drainage connection grooves are detachably connected to protective connection structures. Each set of protective connection structures includes two opposing clamps, which are detachably connected. Each clamp has a mounting base on its other side surface, which is detachably connected to an overhead mounting structure. By forming drainage connection grooves on the insulating sheath, water can be quickly drained and the windward area reduced, improving insulation safety and wind resistance. Furthermore, the protective connection structures that cooperate with the grooves provide cable protection and a foundation for installation. Combined with the overhead mounting structure connecting to the mounting base, this enhances the cable's insulation safety, structural stability, and ease of installation and maintenance in outdoor overhead environments.

Description

Technical Field

[0001] This utility model relates to the field of cables, and more specifically, to a parallel bundled overhead cross-linked polyethylene insulated cable. Background Technology

[0002] Existing integrated parallel bundled overhead cables mostly use integral extruded sheaths for bundling. Although the overall integrity is good, there are obvious limitations. On the one hand, the large surface area of ​​the sheath makes it easy for water to accumulate. Long-term immersion affects the insulation safety, and the large windward area makes it susceptible to severe wind swaying, which aggravates cable wear. On the other hand, the overhead installation structure often requires damaging the sheath or relying on metal fasteners, which is not only inconvenient to install and affects the insulation, but also easily shortens the life of the insulation layer due to friction at the contact points with other objects. At the same time, there is a lack of integrated structural design that combines drainage, ventilation and installation positioning functions, making it difficult to achieve both stability and insulation durability of the cable in the outdoor overhead environment.

[0003] How to invent a parallel bundled overhead cross-linked polyethylene insulated cable to improve these problems has become an urgent problem for those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a parallel bundled overhead cross-linked polyethylene insulated cable, which aims to improve the existing integrated parallel bundled overhead cable, which uses an integral extruded sheath to achieve bundling, resulting in the lack of an integrated structural design that combines drainage, ventilation, and installation positioning functions, making it difficult to balance the stability and insulation durability of the cable in outdoor overhead environments.

[0005] This utility model is implemented as follows: A parallel bundled overhead cross-linked polyethylene insulated cable includes several parallelly distributed conductor cores. The conductor cores are covered with an integrally formed insulating material. Several drainage connection grooves are evenly distributed along the length direction through the middle surface of the insulating material. Some of the drainage connection grooves are detachably connected to protective connection structures. Each set of protective connection structures includes two opposing clamps. The two clamps are respectively located on the upper and lower sides of the insulating material and are opposite to each other. The opposing side surface of the two clamps is provided with a positioning and limiting structure that cooperates with the drainage connection grooves. The two clamps are detachably connected. Each clamp has a mounting seat on the other side surface. The mounting seat located at the top is detachably connected to an overhead mounting structure.

[0006] In a preferred embodiment of this utility model, the positioning and limiting structure includes a limiting protrusion integrally disposed on one side surface of each clamping plate. The shape and size of the limiting protrusion are consistent with the drainage connection groove, and the thickness of the limiting protrusion is half the depth of the drainage connection groove.

[0007] In a preferred embodiment of this utility model, one side surface of each clamp plate has a structure corresponding to the shape of the upper and lower surfaces of the insulating material.

[0008] In a preferred embodiment of this utility model, each of the clamps has several cable tie slots through the middle surface.

[0009] In a preferred embodiment of this utility model, the edges of each cable tie slot opening are rounded.

[0010] In a preferred embodiment of this utility model, each of the overhead mounting structures includes two opposing arc-shaped clamps. Both ends of the two arc-shaped clamps are provided with mounting holes for inserting fasteners. One of the arc-shaped clamps has a connecting rod integrally provided at one end, and a base integrally provided at the other end of the connecting rod. The base is inserted into a slot correspondingly provided on the surface of the mounting base. Through holes and threaded holes are respectively provided at the four corners of the surface of the base and at the four corners of the inner wall of the bottom of the slot.

[0011] In a preferred embodiment of this utility model, a plurality of reinforcing ribs are integrally provided at the connection between the connecting rod and the base.

[0012] The beneficial effects of this utility model are as follows: The parallel bundled overhead cross-linked polyethylene insulated cable obtained by the above design can achieve rapid drainage of accumulated water and reduce the windward area by opening drainage connection grooves in the integrally formed cross-linked polyethylene insulation material, thereby improving insulation safety and wind sway stability. Furthermore, the protective connection structure that cooperates with the grooves can protect the cable and build the installation foundation without damaging the insulation by using two clamps. In addition, the overhead installation structure can stably connect to the installation base through a detachable connection method. The overall structure is not only lightweight and has good insulation, but also facilitates installation, disassembly and maintenance. It solves the problems of water accumulation, wind sway, installation friction and insufficient reliability of connectors in existing integrated bundled cables, and improves the insulation safety, structural stability and installation and maintenance convenience of the cable in the outdoor overhead environment. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic perspective view of the overall structure provided by the embodiment of this utility model; Figure 2A schematic perspective view of the overall structure of the conductor core and insulating material provided for an embodiment of this utility model; Figure 3 A schematic perspective view of the overall structure of the clamping plate provided for an embodiment of this utility model; Figure 4 A three-dimensional schematic diagram of the overall separation structure of the overhead installation structure provided for the embodiment of this utility model.

[0015] In the diagram: 1-guide core; 2-insulating packaging material; 3-protective connection structure; 4-overhead installation structure; 201-drainage connection groove; 301-clamp plate; 302-cable tie through groove; 303-mounting base; 304-slot; 305-threaded hole; 401-arc clamp; 402-assembly hole; 403-connecting rod; 404-base; 405-reinforcing rib. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] Please see Figures 1 to 4 This utility model provides a technical solution: a parallel bundled overhead cross-linked polyethylene insulated cable, comprising several parallelly distributed conductor cores 1, the conductor cores 1 being covered by an integrally formed insulating sheath 2, the middle surface of the insulating sheath 2 having several drainage connection grooves 201 evenly distributed along the length direction, some of the drainage connection grooves 201 being detachably connected to protective connection structures 3, each set of protective connection structures 3 including two oppositely arranged clamps 301, the two clamps 301 being respectively located on the upper and lower sides of the insulating sheath 2 being oppositely arranged, the opposite side surface of the two clamps 301 being provided with positioning and limiting structures that cooperate with the drainage connection grooves 201, the two clamps 301 being detachably connected, each clamp 301 having a mounting seat 303 on the other side surface, wherein the mounting seat 303 located above is detachably connected to an overhead mounting structure 4.

[0018] It should be noted that the parallel conductive cores 1 are preferably multi-stranded copper or aluminum conductors to ensure conductivity and flexibility, adapting to the wind-induced swaying conditions during overhead operation. The conductive cores 1 are covered by an integrally molded insulating material 2 made of cross-linked polyethylene. Through chemical cross-linking, the molecules form a network structure, providing temperature resistance above 90℃, UV resistance, and aging resistance. This ensures stable insulation in outdoor overhead environments, preventing leakage / short circuits. The insulating material 2 bundles multiple conductive cores 1 together in parallel, achieving integrated parallel bundle structure. Several drainage connecting grooves 201 are evenly distributed along the length of the central surface of the insulating material 2. During rainy weather, accumulated water can be quickly drained through these grooves, preventing the insulation layer from soaking. Simultaneously, the grooves cut off the continuous windward side, reducing wind resistance and improving wind-induced swaying stability. The drainage connection channel 201 is partially connected to a detachable protective connection structure 3. Each set of protective connection structures 3 includes two opposing clamps 301, located on the upper and lower sides of the insulating material 2, respectively. The clamps 301 are made of insulating plastic, such as PVC or nylon, which is lightweight and insulating, and is injection molded. The two clamps 301 are provided with a positioning and limiting structure that cooperates with the drainage connection channel 201 on one side to achieve precise positioning. The two clamps 301 are detachably connected for easy installation and maintenance. The other side of each clamp 301 is integrally provided with a mounting base 303. The upper mounting base 303 is detachably connected to the overhead installation structure 4. The cable is fixed to the base such as the pole or tower through the overhead installation structure 4 to complete the "overhead" laying, which meets the long-distance transmission needs of medium and low voltage distribution networks such as rural or urban edge power supply.

[0019] Please see Figure 3 The positioning and limiting structure includes a limiting protrusion integrally set on one side surface of each clamping plate 301. The shape and size of the limiting protrusion are consistent with the drainage connection groove 201, and the thickness of the limiting protrusion is half the depth of the drainage connection groove 201.

[0020] The positioning and limiting structure is a limiting protrusion integrally set on one side surface of each clamping plate 301. It is made of the same material as the clamping plate 301 and is integrally molded by injection molding. The shape and size of the limiting protrusion are completely consistent with the drainage connection groove 201, and can be accurately embedded in the groove. Moreover, the thickness of the limiting protrusion is half the depth of the drainage connection groove 201, which ensures the positioning effect on the clamping plate 301 after embedding and prevents relative sliding.

[0021] Furthermore, one side surface of each clamp 301 has a structure corresponding to the shape of the upper and lower surfaces of the insulating sheath 2.

[0022] The surface of each clamping plate 301 that contacts the insulating material 2 is molded into a suitable shape according to the outer contour formed by the parallel bundled cores 1 of the insulating material 2, such as the arc or concave-convex surface of the insulating material after multiple cores are arranged in parallel. This ensures that the clamping plate 301 and the insulating material 2 fit together completely when in contact, increasing the contact area to improve the clamping friction and stability, while evenly distributing the clamping force to prevent the insulating material 2 from being locally deformed or damaged by pressure.

[0023] Furthermore, each clamp 301 has several cable tie slots 302 through the middle surface.

[0024] Several cable tie slots 302 are evenly provided along the length of the middle surface of each clamp 301. The number depends on the length of the clamp. During installation, nylon self-locking cable ties are inserted into the cable tie slots 302. By tightening the cable ties, the two opposing clamps 301 are tightly wrapped on the insulating material 2, thus achieving a detachable connection.

[0025] Furthermore, the edges of the openings of each cable tie slot 302 are rounded.

[0026] The opening edge of each cable tie slot 302 is rounded by the injection mold rounding design to avoid damage caused by sharp edge friction when the cable tie is inserted or pulled out, thus extending the cable tie's lifespan. At the same time, it reduces stress concentration at the edge of the slot of the clamping plate 301, preventing the clamping plate from cracking due to the cable tie tension and improving structural durability.

[0027] Please see Figure 4 Each overhead mounting structure 4 includes two opposing arc-shaped clamps 401. Both ends of the two arc-shaped clamps 401 are provided with mounting holes 402 for inserting fasteners. One end of one arc-shaped clamp 401 is integrally provided with a connecting rod 403, and the other end of the connecting rod 403 is integrally provided with a base 404. The base 404 is inserted into the corresponding slot 304 on the surface of the mounting base 303. The four corners of the surface of the base 404 and the four corners of the bottom inner wall of the slot 304 are respectively provided with through holes and threaded holes 305.

[0028] The overhead installation structure 4 includes two opposing arc-shaped clamps 401, made of galvanized steel or aluminum alloy, which are high in strength and corrosion-resistant, and adaptable to the shape of the tower crossarm. The two arc-shaped clamps 401 have corresponding mounting holes 402 at both ends, into which bolts and nuts can be inserted to tighten and fix them to the tower crossarm. One end of one arc-shaped clamp 401 is integrally provided with a connecting rod 403, and the other end of the connecting rod 403 is integrally provided with a base 404. The base 404 is inserted into the slot 304 of the mounting base 303. The four corners of the surface of the base 404 and the four corners of the bottom inner wall of the slot 304 are respectively provided with through holes and threaded holes 305. Bolts are screwed into the threaded holes 305 through the through holes to achieve detachable fixation between the base 404 and the mounting base 303, so that the overhead installation structure 4 can stably carry the cable and connect to the installation base.

[0029] Furthermore, several reinforcing ribs 405 are integrally provided at the connection between the connecting rod 403 and the base 404.

[0030] Several triangular rib-shaped reinforcing ribs 405 are integrally provided at the connection between the connecting rod 403 and the base 404. They are evenly distributed around the connection to effectively disperse the load transmitted from the connecting rod to the base, prevent deformation and breakage at the connection due to stress concentration, improve the mechanical strength and fatigue resistance of the overhead installation structure 4, and ensure the connection stability under long-term wind swing and self-weight load.

[0031] Working principle: Several conductor cores 1 are bundled in parallel by an integrally formed cross-linked polyethylene insulation sheath 2 to achieve insulation protection. The drainage connection groove 201 on the insulation sheath 2 is used to drain accumulated water to prevent the insulation layer from being soaked, and also reduces the windward area to improve wind swing stability. When overhead installation or protection is required, the two clamps 301 of the protection connection structure 3 are precisely positioned by the limiting protrusions that cooperate with the drainage connection groove 201. Then, the cable tie is inserted into the cable tie through the cable tie through the slot 302 to achieve detachable clamping and fixing, providing protection for the cable and forming an installation foundation. Subsequently, the two arc-shaped clamps 401 of the overhead installation structure 4 are clamped to the installation base such as the tower by fasteners. The base 404 at the end of the connecting rod 403 is detachably connected to the mounting seat 303 on the clamp 301 by bolts. At the same time, the reinforcing rib 405 between the connecting rod 403 and the base 404 enhances the structural strength. Finally, the cable is stably suspended in the outdoor environment to meet the long-distance power transmission needs of medium and low voltage distribution networks.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A parallel bundled overhead cross-linked polyethylene insulated cable, characterized in that, The device includes several parallel conductive cores, each of which is covered by an integrally formed insulating material. Several drainage connection slots, evenly distributed along the length, are formed through the middle surface of the insulating material. Some of the drainage connection slots are detachably connected to protective connection structures. Each set of protective connection structures includes two opposing clamps, located on the upper and lower sides of the insulating material. Each clamp has a positioning and limiting structure on one opposite side surface that mates with the drainage connection slots. The two clamps are detachably connected. Each clamp has a mounting base on its other side surface, with an overhead mounting structure detachably connected to the upper mounting base.

2. The parallel bundled overhead cross-linked polyethylene insulated cable as described in claim 1, characterized in that: The positioning and limiting structure includes a limiting protrusion integrally formed on one side surface of each clamping plate. The shape and size of the limiting protrusion are consistent with the drainage connection groove, and the thickness of the limiting protrusion is half the depth of the drainage connection groove.

3. The parallel bundled overhead cross-linked polyethylene insulated cable as described in claim 1, characterized in that: One side surface of each of the clamps has a structure corresponding to the shape of the upper and lower surfaces of the insulating material.

4. The parallel bundled overhead cross-linked polyethylene insulated cable as described in claim 1, characterized in that: Each of the clamps has several cable tie slots through its central surface.

5. The parallel bundled overhead cross-linked polyethylene insulated cable as described in claim 4, characterized in that: The edges of each of the cable tie slot openings are rounded.

6. The parallel bundled overhead cross-linked polyethylene insulated cable as described in claim 1, characterized in that: Each of the above-ground mounting structures includes two opposing arc-shaped clamps. Both ends of the two arc-shaped clamps are provided with mounting holes for inserting fasteners. One of the arc-shaped clamps is integrally provided with a connecting rod at one end, and a base is integrally provided at the other end of the connecting rod. The base is inserted into a slot corresponding to the surface of the mounting base. Through holes and threaded holes are respectively provided at the four corners of the surface of the base and at the four corners of the inner wall of the bottom of the slot.

7. The parallel bundled overhead cross-linked polyethylene insulated cable as described in claim 6, characterized in that: Several reinforcing ribs are integrally provided at the connection between the connecting rod and the base.

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