Anti-aging cable accessory

Abstract

The application relates to the technical field of cable main body accessories, in particular to an anti-aging cable accessory, which comprises a cable main body, three cold-shrink insulation tubes fixedly connected at the top end of the cable main body at equal angles and wiring terminals fixedly connected at the top end of the three cold-shrink insulation tubes. Through the setting of a liquid supply assembly and a spraying flow guide assembly, the cable accessory can automatically start and quantitatively transport protective agents when the cable accessory is in a high-temperature working condition. After the protective agents are transported to the initial end of the flow guide groove of the spiral umbrella skirt, the protective agents can flow along the flow guide groove in a directional spiral manner. With the guiding effect of the spiral structure, the surface of the umbrella skirt and the cold-shrink insulation tube can be covered, the dead angle of protection is reduced, the key parts can be effectively protected, in addition, the covered protective agents can effectively isolate the direct erosion of high temperature on the materials of the umbrella skirt and the cold-shrink insulation tube, can fill the fine cracks generated on the surface of the umbrella skirt and the cold-shrink insulation tube, can prevent the cracks from further expanding, can significantly delay the aging speed of the materials, and can prolong the overall service life of the cable accessory.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable main body accessories, in particular to an anti-aging cable accessory. BACKGROUND

[0002] In the power transmission and distribution system, cable accessories, as the core components of connecting cables and ensuring the safe and stable operation of cable systems, have rich categories and different functions, mainly including cable joints, cable protection pipes, insulation sleeves, and cold-shrink cable terminals, etc. Among them, the cold-shrink cable terminal is a component of various cable accessories, which is formed by injecting and vulcanizing an elastomer material in the factory, and then expanding and lining with a plastic spiral support. The common cable terminal is a three-wire terminal, that is, one end of the terminal head is divided into three groups of cold-shrink insulation pipes, each of which has uneven umbrella skirts, and the three groups of cold-shrink insulation pipes are separated from each other.

[0003] The cold-shrink cable terminal has a pre-expansion structure design, which does not need to rely on heating equipment during installation. It only needs to remove the support to shrink and tightly fit the cable insulation layer by the material itself. It is widely used in cable terminal processing of medium and low voltage distribution systems, especially in scenes where heating operation is not convenient due to limited construction conditions. Compared with the heat-shrink cable terminal, it has certain initial advantages in installation convenience.

[0004] However, the existing cold-shrink cable terminal does not have a mechanism for actively preventing cracking and slowing down aging, which makes it prone to performance degradation in typical scenes such as outdoor high-temperature exposure and industrial high-load power distribution. High temperature directly acts on the surface of the umbrella skirt and the cold-shrink insulation pipe of the terminal, accelerating the aging process of the materials: on the one hand, it significantly reduces the surface elasticity and continuously enhances the brittleness, greatly reducing the material's resistance to cracking; on the other hand, it gradually generates fine cracks inside the material. These initial cracks will expand with the cyclic changes in environmental temperature and long-term stress in subsequent use, eventually breaking through the original insulation seal structure of the terminal. After the seal fails, impurities such as dust and moisture from the outside world can easily enter the terminal, further accelerating material aging and performance degradation, and ultimately greatly shortening the service life of the cold-shrink cable terminal. SUMMARY

[0005] The present application aims to provide an anti-aging cable accessory to solve the problem of the existing cold-shrink cable terminal not having a mechanism for actively preventing cracking and slowing down aging, which makes it prone to performance degradation in typical installation environments such as outdoor high-temperature or industrial high-load power distribution. High temperature directly acts on the surface of the umbrella skirt and the cold-shrink insulation pipe of the terminal, accelerating the aging process of the materials, and greatly shortening the service life of the cold-shrink cable terminal.

[0006] In order to achieve the above object, the present application provides the following technical scheme: An anti-aging cable accessory, comprising a cable main body, three cold shrink insulation tubes fixedly connected at the top end of the cable main body in an equiangular manner, and a terminal fixedly connected at the top end of the three cold shrink insulation tubes, a limiting box is arranged between the three cold shrink insulation tubes, the bottom surface of the limiting box is attached to the top surface of the cable main body, an installation cavity is formed in the inside of the limiting box, a trigger liquid supply assembly for high-temperature trigger protection agent supply is arranged in the inside of the installation cavity, a spraying flow guide assembly for guiding the protection agent is arranged on the outside of each of the three cold shrink insulation tubes and is in communication with the trigger liquid supply assembly, a dismounting assembly for quickly dismounting the limiting box is arranged on the outside of the limiting box; the trigger liquid supply assembly comprises a liquid storage box, a suction cylinder and a squeezing cylinder, the liquid storage box is fixedly installed on one side of the bottom wall of the installation cavity, the suction cylinder is fixedly installed on one side of the side wall of the installation cavity away from the liquid storage box, and the squeezing cylinder is fixedly installed on one side of the side wall of the installation cavity close to the suction cylinder.

[0007] Further, an umbrella skirt is fixedly sleeved on the outside of each of the three cold shrink insulation tubes, and the umbrella skirt is arranged in a spiral shape.

[0008] Further, a heat-conducting copper block is sealingly and fixedly installed at the bottom end of the squeezing cylinder, one end of the heat-conducting copper block penetrates through and is placed on one side of the outside of the limiting box, a first piston block is slidingly and sealingly arranged in the inside of the bottom end of the squeezing cylinder, a cavity between the heat-conducting copper block and the first piston block in the squeezing cylinder is filled with a thermal expansion and contraction liquid, and a connecting rod is vertically fixedly arranged at the top end of the first piston block.

[0009] Further, a second piston block is fixedly installed at the top end of the connecting rod, a compression spring is sleeved on the outside of the connecting rod, both ends of the compression spring are fixedly installed at one side of the top end of the first piston block and one side of the bottom end of the suction cylinder respectively, the second piston block is slidingly and sealingly arranged in the inside of the bottom end of the suction cylinder, a flow guide pipe and a liquid inlet pipe are fixedly installed at the top end of the suction cylinder, a second one-way valve is fixedly arranged in the inside of one side of the liquid inlet pipe, the input end of the liquid inlet pipe is fixedly installed in the inside of one side of the bottom end of the liquid storage box, a first one-way valve is fixedly arranged in the inside of one side of the flow guide pipe, the output end of the flow guide pipe is fixedly arranged on one side of the top end of the limiting box, and a sealing cover is threadedly and sealingly installed at the top end of the liquid storage box.

[0010] Further, a shunt box is fixedly installed at the output end of the flow guide pipe, the spraying flow guide assembly comprises a liquid discharge pipe, the input end of the liquid discharge pipe is fixedly installed in the inside of one side of the shunt box, a flow guide groove is spirally formed in the inside of the top end of the umbrella skirt, and the output end of the liquid discharge pipe is arranged on one side of the initial end of the flow guide groove.

[0011] Further, the top end and the bottom end of the drain pipe are externally sleeved with rubber connecting blocks, arc-shaped plastic clamping blocks are fixedly installed on the side of the rubber connecting blocks close to the cold shrink insulation pipes.

[0012] Further, the dismounting assembly comprises a pressing ring and three cavity connecting blocks, the pressing ring is externally sleeved on one side of the limiting box, the pressing ring can vertically slide along the limiting box, the three cavity connecting blocks are fixedly installed on the outside of the limiting box close to the three cold shrink insulation pipes, the bottom end of the pressing ring is arc-shaped, a plurality of limiting strips are vertically and fixedly installed on the outside of the limiting box at equal angles, and the inner wall of the pressing ring and the outside of the plurality of limiting strips are in through sliding connection.

[0013] Further, two arc-shaped clamping blocks are symmetrically arranged on the outside of the end of the cavity connecting block away from the limiting box, rubber pads are fixedly installed on the inner walls of the arc-shaped clamping blocks, a limiting sliding groove is formed in the top end of each cavity connecting block, arc-shaped abutting blocks are slidingly and clampingly installed in the limiting sliding groove, the top end of the arc-shaped abutting block is arc-shaped, and the top end of the arc-shaped abutting block is in abutting fit with the bottom end of the pressing ring.

[0014] Further, the inside of the cavity connecting block is horizontally provided with a mounting block, one end of the mounting block is fixedly connected with the bottom end of the arc-shaped abutting block, the other end of the mounting block is fixedly installed with a limiting block, the side of the limiting block away from the mounting block is fixedly installed with a double-sided tooth block, and a tension spring is fixedly connected between the side of the limiting block and the inner wall of the side of the cavity connecting block.

[0015] Further, the side of each arc-shaped clamping block close to the double-sided tooth block is fixedly installed with a gear, the side of the gear is meshingly connected with the side of the double-sided tooth block, a limiting shaft is fixedly installed in the inside of the gear, and the two ends of the limiting shaft are rotatably installed in the top end and the bottom end of the cavity connecting block.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] 1. By triggering the liquid supply component and the spraying guide component, this cable accessory can automatically start and quantitatively deliver protective agent when it is under high temperature conditions. After the protective agent is delivered to the initial end of the guide groove of the spiral shed, it can flow in a directional spiral along the guide groove. With the guiding effect of the spiral structure, it can cover the surface of the shed and the cold shrink insulation tube, reduce the protection dead angle, and ensure that the critical parts can be effectively protected. In addition, the protective agent after coverage can effectively isolate the direct corrosion of the shed and cold shrink insulation tube materials by high temperature, and fill the micro cracks that have been generated on the surface of the two, prevent the cracks from expanding further, significantly slow down the aging rate of the materials, solve the dry cracking problem caused by high temperature from the root, and ultimately greatly extend the overall service life of the cable accessory.

[0018] 2. The modular design provides exceptional flexibility and practicality for cable accessory maintenance and component reuse, reducing maintenance costs and improving operational efficiency. When core cable components such as the cable body or cold-shrink insulation tubing are damaged, but the limit box, trigger liquid supply component, and spray guide component remain intact, these functional components can be quickly removed from the damaged cable using the modular design without destructive disassembly. They can then be directly assembled onto a new cable body, enabling the reuse of core protection components. This avoids the scrapping of functional components due to cable damage, significantly reducing waste of parts and lowering equipment replacement costs. Furthermore, if the limit box, trigger liquid supply component, or spray guide component itself malfunctions, there is no need to disassemble the entire cold-shrink cable terminal. The faulty component can be removed individually using the modular design, replaced with a new functional component, and then reassembled. This avoids potential damage to critical terminal structures such as the cold-shrink insulation tubing and sheds caused by overall disassembly, achieving convenient disassembly, simplifying maintenance procedures, shortening repair time, and ensuring the stable operation of the power system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a partial cross-sectional perspective view of the three-dimensional structure of the limiting box and the liquid storage box of the present invention;

[0021] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 This is a partial cross-sectional three-dimensional structural schematic diagram of the suction cylinder and the extrusion cylinder of the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the cold-shrink insulating tube and umbrella skirt of the present invention;

[0024] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0025] Figure 7 It is the three-dimensional structural schematic view of cavity connecting block and arc clamping block of the present application;

[0026] Figure 8 It is Figure 7 It is the enlarged structural schematic view at C in the middle;

[0027] Figure 9 It is the partial sectional three-dimensional structural schematic view of cavity connecting block and limiting block of the present application;

[0028] Figure 10 It is the overhead structural schematic view of limiting strip and compression ring of the present application.

[0029] In the drawings, the component list represented by each sign is as follows:

[0030] 1, cable main body; 2, cold shrink insulation tube; 3, wiring terminal; 4, umbrella skirt; 5, limiting box; 6, installation cavity; 7, liquid storage box; 8, suction cylinder; 9, extrusion cylinder; 10, heat-conducting copper block; 11, first piston block; 12, connecting rod; 13, second piston block; 14, compression spring; 15, flow guide pipe; 16, first one-way valve; 17, shunt box; 18, liquid discharge pipe; 19, rubber connecting block; 20, plastic clamping block; 21, flow guide groove; 22, liquid inlet pipe; 23, second one-way valve; 24, sealing cover; 25, limiting strip; 26, compression ring; 27, cavity connecting block; 28, arc clamping block; 29, rubber pad; 30, limiting sliding slot; 31, arc abutting block; 32, installation block; 33, limiting block; 34, double-sided tooth block; 35, gear; 36, limiting shaft; 37, tension spring. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0032] Embodiment one: please refer to Figure 1 - Figure 6The utility model provides an anti-aging cable accessory, including cable body 1, three cold shrink insulation tubes 2 of equiangular fixed connection in the top of cable body 1 and three terminal blocks 3 of fixed connection in the top of three cold shrink insulation tubes 2, the bottom surface of limiting box 5 is pasted with the top surface of cable body 1, the inside of limiting box 5 is equipped with installation cavity 6, and the inside of installation cavity 6 is provided with trigger liquid supply assembly for high-temperature trigger protection agent supply, the outside of three cold shrink insulation tubes 2 is provided with the spray flow guide assembly for flow protection agent with trigger liquid supply assembly intercommunication, and trigger liquid supply assembly includes liquid storage box 7, suction cylinder 8 and extrusion cylinder 9, liquid storage box 7 is fixedly installed on the bottom wall of installation cavity 6 on one side, suction cylinder 8 is fixedly installed on the side wall of installation cavity 6 away from liquid storage box 7 on one side, and extrusion cylinder 9 is fixedly installed on the side wall of installation cavity 6 close to suction cylinder 8 on one side.

[0033] The outside of cold shrink insulation tube 2 is sleeved with fixed umbrella skirt 4, and the umbrella skirt 4 is spiral.

[0034] The bottom end of extrusion cylinder 9 is sealingly fixedly installed with heat-conducting copper block 10, one end of heat-conducting copper block 10 penetrates and is placed on the outside of one side of limiting box 5, the bottom end of extrusion cylinder 9 is slidingly and sealingly provided with first piston block 11, and the cavity between extrusion cylinder 9, heat-conducting copper block 10 and first piston block 11 is filled with thermal expansion and contraction liquid, and the top end of first piston block 11 is vertically fixed with connecting rod 12.

[0035] The top end of connecting rod 12 is fixedly installed with second piston block 13, the outside of connecting rod 12 is sleeved with compression spring 14, the two ends of compression spring 14 are fixedly installed on the top end side of first piston block 11 and the bottom end side of suction cylinder 8 respectively, second piston block 13 is slidingly and sealingly arranged in the bottom end of suction cylinder 8, the top end of suction cylinder 8 is fixedly installed with flow guide pipe 15 and liquid inlet pipe 22 penetratingly, the inside of one side of liquid inlet pipe 22 is fixedly provided with second one-way valve 23, the input end of liquid inlet pipe 22 is fixedly installed in the bottom end inside of liquid storage box 7, the inside of one side of flow guide pipe 15 is fixedly provided with first one-way valve 16, the output end of flow guide pipe 15 is fixed on the top end outside of limiting box 5, and the top end of liquid storage box 7 is threadedly and sealingly installed with sealing cover 24.

[0036] The output end of flow guide pipe 15 is fixedly installed with shunt box 17 penetratingly, and the spray flow guide assembly includes liquid discharge pipe 18, the input end of liquid discharge pipe 18 is fixedly installed in the inside of one side of shunt box 17 penetratingly, the inside of the top end of umbrella skirt 4 is spirally provided with flow guide groove 21, and the output end of liquid discharge pipe 18 is arranged on the initial end side of flow guide groove 21.

[0037] The top end and the bottom end of the drainage pipe 18 are externally sleeved with rubber connecting blocks 19, and the rubber connecting blocks 19 are externally fixed with arc-shaped plastic clamping blocks 20 close to one side of the cold shrink insulation pipe 2.

[0038] The cable accessory of the embodiment is convenient to install, and is mainly applied to power distribution lines exposed to high temperature outdoors, high-load motor cable connection ends in industrial workshops, and dense multi-cable arrangement in closed cable trenches, etc. In such scenes, the cable main body 1 bears large current for a long time, and a large amount of Joule heat is easily generated. After superimposing the high temperature of the environment, the cold shrink insulation pipe 2 and the surface of the shed skirt 4 are prone to dry cracking. The accessory can automatically realize the supply and coverage of the protective agent through the synergistic effect of the liquid supply assembly and the spraying and guiding assembly, thereby relieving the above problems. The specific working principle is as follows:

[0039] When the cable accessory is in a high-temperature environment or generates high temperature due to high-load operation, the heat-conducting copper block 10 outside the limiting box 5 can quickly absorb the heat transmitted by the cable main body 1 and the cold shrink insulation pipe 2 and the environmental heat, and conduct the heat to the inside of the extrusion cylinder 9. The thermal expansion and contraction liquid (such as kerosene, ethanol mixed liquid, etc.) between the heat-conducting copper block 10 and the first piston block 11 in the extrusion cylinder 9 expands in volume after being heated, generates an upward thrust, pushes the first piston block 11 to slide upward along the inner wall of the extrusion cylinder 9, and the connecting rod 12 fixed at the top end of the first piston block 11 moves upward synchronously, drives the second piston block 13 at the top end to slide upward in the suction cylinder 8, and at the same time, the compression spring 14 sleeved outside the connecting rod 12 is extruded, so that the compression spring 14 is in a contracted and stored state. As the second piston block 13 moves upward in the suction cylinder 8, the second piston block 13 will extrude the protective agent pre-stored in the suction cylinder 8. Due to the pressure effect, the first one-way valve 16 in the top end of the guiding pipe 15 of the suction cylinder 8 is opened, and the second one-way valve 23 in the liquid inlet pipe 22 is closed due to the reverse pressure (to avoid the backflow of the protective agent to the liquid storage box 7). The extruded protective agent is transported to the shunt box 17 through the guiding pipe 15, the shunt box 17 uniformly distributes the protective agent to the three drainage pipes 18 (the drainage pipes 18 are clamped and fixed outside the cold shrink insulation pipe 2 through the rubber connecting blocks 19 and the arc-shaped plastic clamping blocks 20, to ensure the stability of the position during transportation), and the output end of the drainage pipe 18 corresponds to the initial end of the top end guiding groove 21 of the shed skirt 4. The protective agent flows along the spiral guiding groove 21 in a directional manner, and covers the surface of the shed skirt 4 and the cold shrink insulation pipe 2 by means of the guiding effect of the spiral structure, greatly reduces the protective dead angle, and ensures that the key parts can be effectively protected. The covered protective agent can effectively isolate the direct erosion of high temperature on the materials of the shed skirt 4 and the cold shrink insulation pipe 2, simultaneously fills the fine cracks generated on the surfaces of the two, prevents the cracks from further expanding, significantly delays the aging speed of the materials, solves the dry cracking problem caused by high temperature from the root, and finally greatly prolongs the overall service life of the cable accessory.

[0040] It also needs to be explained that when the ambient temperature decreases or the cable load decreases, the heat transferred by the heat-conducting copper block 10 decreases, the volume of the thermal expansion and contraction liquid in the extrusion cylinder 9 shrinks, the compression spring 14 wrapped outside the connecting rod 12 releases the stored force, pulls the first piston block 11 to reset downward, and the connecting rod 12 drives the second piston block 13 to move downward synchronously in the suction cylinder 8. At this time, the protective agent (such as silicone rubber maintenance agent, insulation anti-cracking agent, etc.) pre-stored in the liquid storage box 7 is guided by the liquid inlet pipe 22 and the second one-way valve 23 and is sucked into the suction cylinder 8, completing the liquid storage process of the protective agent and preparing for the next high-temperature trigger spraying. In addition, the sealing cover 24 at the top of the liquid storage box 7 can be opened by screwing. When the protective agent in the box is consumed to a certain amount, the sealing cover 24 can be opened to supplement the protective agent, ensuring the long-term stable operation of the trigger liquid supply assembly.

[0041] It also needs to be explained that in actual manufacture, the cable accessory needs to be made of corrosion-resistant elastic sealing material compatible with the thermal expansion and contraction liquid and the protective agent to ensure that the sealing member is tightly attached to the inner wall of the extrusion cylinder 9 and the suction cylinder 8 without gap; special lubricating sealant is applied at the contact between the connecting rod 12 and the sealing surface during assembly to reduce wear during reciprocating motion. At the same time, the machining precision of the first piston block 11 and the second piston block 13 is controlled to ensure that the cooperation gap between them and the corresponding cylinder wall is uniform, avoiding damage to the sealing effect due to eccentric wear. Through the selection of sealing materials compatible with the medium, precise machining and assembly lubrication and protection, the mutual leakage of the two liquids can be prevented, and the air tightness and long-term stable operation of the trigger liquid supply assembly can be ensured.

[0042] Example two: please refer to Figure 7 Figure 10 This embodiment further illustrates example one. The outside of the limiting box 5 is provided with a disassembly assembly for quickly disassembling the limiting box 5.

[0043] The disassembly assembly includes a compression ring 26 and three cavity connecting blocks 27. The compression ring 26 is wrapped outside one side of the limiting box 5 and can slide vertically along the limiting box 5. The three cavity connecting blocks 27 are fixedly installed outside one side of the limiting box 5 close to the three cold shrink insulation pipes 2. The bottom outer edge of the compression ring 26 is arc-shaped, and the limiting box 5 has a plurality of limiting strips 25 fixedly installed vertically and equidistantly on the outside. The inner wall of the compression ring 26 and the outside of the plurality of limiting strips 25 are connected in a through sliding manner.

[0044] ​The outer part of one end of the cavity connecting block 27 away from the limiting box 5 is symmetrically provided with two arc-shaped clamping blocks 28, the inner wall of the arc-shaped clamping block 28 is fixedly installed with a rubber pad 29, the top end of each cavity connecting block 27 is provided with a limiting sliding groove 30, the inner part of the limiting sliding groove 30 is slidably connected with an arc-shaped abutting block 31, the top end of the arc-shaped abutting block 31 is arc-shaped, and the top end of the arc-shaped abutting block 31 is in abutting fit with one side of the bottom end of the pressing ring 26.

[0045] The inner part of the cavity connecting block 27 is transversely provided with a mounting block 32, one end of the mounting block 32 is fixedly connected with one side of the bottom end of the arc-shaped abutting block 31, the other end of the mounting block 32 is fixedly installed with a limiting block 33, one side of the limiting block 33 away from the mounting block 32 is fixedly connected with a double-sided tooth block 34, and a tension spring 37 is fixedly connected between one side of the limiting block 33 and the inner wall of one side of the cavity connecting block 27.

[0046] One side of each arc-shaped clamping block 28 close to the double-sided tooth block 34 is fixedly installed with a gear 35, one side of the gear 35 is meshingly connected with one side of the double-sided tooth block 34, and the inner part of the gear 35 is fixedly installed with a limiting shaft 36, both ends of the limiting shaft 36 are rotatably installed in the inner part of the top end and the bottom end of the cavity connecting block 27.

[0047] The disassembly and assembly assembly of the embodiment is mainly used in two core scenes: one is when the cable main body 1 or the cold shrink insulation pipe 2 is damaged, and the limiting box 5, the trigger liquid supply assembly and the spraying flow guide assembly are still intact, these intact assemblies need to be disassembled and reused to a new cable; the other is when the limiting box 5 or the function assembly associated with it is damaged, the entire cold shrink cable terminal does not need to be disassembled, only these faulty assemblies need to be disassembled, the overall operation does not need complicated tools, realizes convenient disassembly and assembly, simplifies the maintenance process, shortens the maintenance time, guarantees the stable operation of the power system, and the specific working principle is as follows:

[0048] The initial pressure ring 26 is located at the top end of the limiting box 5. Before installation, the pressure ring 26 needs to be slid downward and sleeved outside the limiting box 5. Because a plurality of limiting strips 25 are fixed around the outside of the limiting box 5, and the limiting strips 25 are in through sliding fit with the inner wall of the pressure ring 26, the pressure ring 26 will not deviate during the downward sliding process, and will always move in the vertical direction. The arc-shaped edge at the bottom end of the pressure ring 26 will contact the arc-shaped abutting block 31 at the top end of the cavity connecting block 27, and generate a downward pushing force, pushing the arc-shaped abutting block 31 to slide in the limiting sliding groove 30 at the top end of the cavity connecting block 27 in a direction away from the limiting box 5. The installation block 32 fixed at the bottom end of the arc-shaped abutting block 31 moves synchronously, driving the limiting block 33 and the double-sided tooth block 34 at the other end of the installation block 32 to move transversely. At this time, the tension spring 37 between the limiting block 33 and the inner wall of the cavity connecting block 27 is stretched and stored. Because the double-sided tooth block 34 is engaged with the gear 35 on one side of the arc-shaped clamping block 28, and the gear 35 is stably supported by the limiting shaft 36, the double-sided tooth block 34 will drive the gear 35 to rotate around the limiting shaft 36 when it moves, thereby causing the two arc-shaped clamping blocks 28 to open in a direction away from the cold shrink insulation tube 2. At this time, the limiting box 5 can be placed between the three cold shrink insulation tubes 2, ensuring that the bottom surface of the limiting box 5 is in close contact with the top surface of the cable body 1. Because the arc-shaped clamping block 28 is in an open state, it will not press the cold shrink insulation tube 2, and the placement process is not hindered, without the need to adjust the original position of the cold shrink insulation tube 2. After the placement is completed, the pressure ring 26 is loosened. At this time, the stretched tension spring 37 immediately releases the stored energy, pulling the limiting block 33 to move in a direction close to the inner wall of the cavity connecting block 27. The double-sided tooth block 34 fixed with the limiting block 33 moves synchronously, and the installation block 32 drives the arc-shaped abutting block 31 to slide back to the initial position along the limiting sliding groove 30. When the double-sided tooth block 34 resets, it drives the engaged gear 35 to rotate in the opposite direction around the limiting shaft 36, thereby driving the two arc-shaped clamping blocks 28 fixed with the gear 35 to move closer to the cold shrink insulation tube 2. Until the rubber pad 29 on the inner wall of the arc-shaped clamping block 28 is tightly attached to the outer wall of the cold shrink insulation tube 2, the limiting box 5 and the associated trigger liquid supply assembly and spray guide assembly are completed, and are fixed on the cable.

[0049] It should be further noted that when subsequent disassembly is required, the pressure ring 26 only needs to be slid downward again, so that the bottom end of the pressure ring 26 pushes the arc-shaped abutting block 31 to move again, the tension spring 37 is stretched, and the arc-shaped clamping block 28 is reopened. The limiting box 5 and the associated assembly can be directly removed from the cable, realizing the reuse of the assembly or the separate replacement of the faulty parts. The whole process does not need to use tools such as screwdrivers and wrenches, is convenient to operate, and does not damage the cable terminal key structures such as the cold shrink insulation tube 2 and the umbrella skirt 4, and is convenient to install and disassemble.

[0050] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0051] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, and it is intended that the scope of the application be limited solely by the scope of the appended claims and the equivalents thereof.

Claims

1. An anti-aging cable accessory, comprising a cable body (1), three cold-shrink insulating tubes (2) fixedly connected at equal angles to the top of the cable body (1), and terminals (3) fixedly connected to the top of the three cold-shrink insulating tubes (2), characterized in that: A limiting box (5) is provided between the three cold shrink insulation tubes (2). The bottom surface of the limiting box (5) is attached to the top surface of the cable body (1). An installation cavity (6) is opened inside the limiting box (5). A trigger liquid supply component for supplying high temperature trigger protective agent is provided inside the installation cavity (6). A spraying and guiding component for guiding protective agent is provided on the outside of the three cold shrink insulation tubes (2) and is connected to the trigger liquid supply component. A disassembly and assembly component for quick disassembly and assembly of the limiting box (5) is provided on the outside of the limiting box (5). The trigger liquid supply assembly includes a liquid storage box (7), a suction cylinder (8), and a squeezing cylinder (9). The liquid storage box (7) is fixedly installed on one side bottom wall of the mounting cavity (6). The suction cylinder (8) is fixedly installed on the side wall of the mounting cavity (6) away from the liquid storage box (7). The squeezing cylinder (9) is fixedly installed on the side wall of the mounting cavity (6) close to the suction cylinder (8). All three cold-shrink insulating tubes (2) are fitted with umbrella skirts (4), which are spiral-shaped. A heat-conducting copper block (10) is sealed and fixedly installed at the bottom end of the extrusion cylinder (9). One end of the heat-conducting copper block (10) is placed outside one side of the limiting box (5). A first piston block (11) is slidably and sealed inside the bottom end of the extrusion cylinder (9). The cavity between the heat-conducting copper block (10) and the first piston block (11) of the extrusion cylinder (9) is filled with a liquid that expands and contracts with temperature. A connecting rod (12) is vertically fixed at the top center of the first piston block (11). The top end of the connecting rod (12) is fixedly installed with a second piston block (13). The outside of the connecting rod (12) is fitted with a compression spring (14). The two ends of the compression spring (14) are respectively fixedly installed on one side of the top end of the first piston block (11) and one side of the bottom end of the suction cylinder (8). The second piston block (13) is slidably sealed inside the bottom end of the suction cylinder (8). The top end of the suction cylinder (8) is fixedly installed with a guide tube (15) and an inlet tube (22). The inside of one side of the inlet tube (22) is fixedly installed with a second one-way valve (23). The input end of the inlet tube (22) is fixedly installed inside the bottom end of the liquid storage box (7). The inside of one side of the guide tube (15) is fixedly installed with a first one-way valve (16). The output end of the guide tube (15) is fixedly installed outside the top end of the limit box (5). The top end of the liquid storage box (7) is threadedly sealed with a sealing cap (24).

2. The anti-aging cable accessory according to claim 1, characterized in that: The output end of the guide pipe (15) is fixedly installed through the diversion box (17). The spray guide assembly includes a drain pipe (18). The input end of the drain pipe (18) is fixedly installed through the inside of one side of the diversion box (17). The top of the umbrella skirt (4) is spirally provided with a guide groove (21). The output end of the drain pipe (18) is located on one side of the initial end of the guide groove (21).

3. The anti-aging cable accessory according to claim 2, characterized in that: Rubber connecting blocks (19) are fixedly fitted on the outside of the top and bottom sides of the drain pipe (18). Arc-shaped plastic clips (20) are fixedly installed on the side of the rubber connecting block (19) near the cold shrink insulating tube (2). The plastic clips (20) are locked and fixed on the outside of the side of the cold shrink insulating tube (2).

4. The anti-aging cable accessory according to claim 1, characterized in that: The assembly and disassembly assembly includes a pressure ring (26) and three cavity connecting blocks (27). The pressure ring (26) is sleeved on the outside of one side of the limiting box (5). The pressure ring (26) can slide vertically along the limiting box (5). The three cavity connecting blocks (27) are respectively fixedly installed on the outside of the limiting box (5) near the three cold shrink insulating tubes (2). The bottom outer edge of the pressure ring (26) is arc-shaped. Several limiting strips (25) are vertically fixedly installed around the outside of the limiting box (5) at equal angles. The inner wall of the pressure ring (26) and the outside of the several limiting strips (25) are connected by a through sliding connection.

5. The anti-aging cable accessory according to claim 4, characterized in that: Two arc-shaped clamping blocks (28) are symmetrically arranged on the outer side of the end of each cavity connecting block (27) away from the limiting box (5). Rubber pads (29) are fixedly installed on the inner wall of each arc-shaped clamping block (28). A limiting groove (30) is opened through the top of each cavity connecting block (27). An arc-shaped abutting block (31) is slidably engaged inside the limiting groove (30). The top of the arc-shaped abutting block (31) is arc-shaped. The top of the arc-shaped abutting block (31) abuts against and fits against one side of the bottom of the pressure ring (26).

6. The anti-aging cable accessory according to claim 5, characterized in that: Each cavity connecting block (27) has a horizontally arranged mounting block (32) inside. One end of the mounting block (32) is fixedly connected to the bottom side of the arc-shaped contact block (31). The other end of the mounting block (32) is fixedly installed with a limiting block (33). A double-sided toothed block (34) is fixedly installed on the side of the limiting block (33) away from the mounting block (32). A tension spring (37) is fixedly connected between one side of the limiting block (33) and one side of the inner wall of the cavity connecting block (27).

7. The anti-aging cable accessory according to claim 6, characterized in that: Each of the arc-shaped clamping blocks (28) has a gear (35) fixedly installed on one side near the double-sided toothed block (34). One side of the gear (35) meshes with one side of the double-sided toothed block (34). A limiting shaft (36) is fixedly installed through the inside of each gear (35). Both ends of the limiting shaft (36) are rotatably installed through the top and bottom of the cavity connecting block (27).

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