Anti-aging cable accessory

Abstract

The invention 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 shrinkage insulation pipes fixedly connected to the top end of the cable main body at equal angles and wiring terminals fixedly connected to the top ends of the three cold shrinkage insulation pipes. When the cable accessory is in a high-temperature working condition, the cable accessory can be automatically started and quantitatively convey the protective agent, the protective agent can directionally and spirally flow along the diversion trenches after being conveyed to the initial ends of the diversion trenches of the spiral umbrella skirts, the surfaces of the umbrella skirts and the cold-shrink insulation tube can be covered by means of the guiding effect of the spiral structure, protection dead corners are reduced, and the service life of the cable accessory is prolonged. In addition, the protective agent after covering can effectively isolate direct erosion of high temperature to the umbrella skirt and the cold-shrink insulation tube material, meanwhile, fine cracks generated on the surfaces of the umbrella skirt and the cold-shrink insulation tube material are filled, the cracks are prevented from further expanding, the aging speed of the material is obviously delayed, and the overall service life of the cable accessory is prolonged.

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] To achieve the above objectives, the present invention provides the following technical solution: an anti-aging cable accessory, comprising a cable body, three cold-shrink insulating tubes fixedly connected at equal angles to the top of the cable body, and terminals fixedly connected to the top of the three cold-shrink insulating tubes. A limiting box is provided between the three cold-shrink insulating tubes, the bottom surface of the limiting box is in contact with the top surface of the cable body, and an installation cavity is provided inside the limiting box. A triggering liquid supply component for supplying a high-temperature triggering protective agent is provided inside the installation cavity. A spraying and guiding component for guiding the protective agent is provided outside each of the three cold-shrink insulating tubes and communicates with the triggering liquid supply component. A disassembly and assembly component for quickly disassembling and assembling the limiting box is provided outside the limiting box. The triggering liquid supply component includes a storage box, a suction cylinder, and a squeezing cylinder. The storage box is fixedly installed on one bottom wall of the installation cavity, the suction cylinder is fixedly installed on the side wall of the installation cavity away from the storage box, and the squeezing cylinder is fixedly installed on the side wall of the installation cavity near the suction cylinder.

[0007] Furthermore, each of the three cold-shrink insulating tubes is fitted with a fixed umbrella skirt, which is spiral in shape.

[0008] Furthermore, a heat-conducting copper block is sealed and fixedly installed at the bottom end of the extrusion cylinder. One end of the heat-conducting copper block is placed outside one side of the limiting box. A first piston block is slidably and sealed inside the bottom end of the extrusion cylinder. The cavity between the heat-conducting copper block and the first piston block is filled with a liquid that expands and contracts with temperature. A connecting rod is vertically fixed at the top center of the first piston block.

[0009] Furthermore, a second piston block is fixedly installed at the top of the connecting rod, and a compression spring is sleeved on the outside of the connecting rod. The two ends of the compression spring are respectively fixedly installed on one side of the top of the first piston block and one side of the bottom of the suction cylinder. The second piston block is slidably sealed inside the bottom of the suction cylinder. A guide tube and an inlet tube are fixedly installed through the top of the suction cylinder. A second one-way valve is fixedly installed through one side of the inlet tube. The input end of the inlet tube is fixedly installed through the bottom of the storage box. A first one-way valve is fixedly installed through one side of the guide tube. The output end of the guide tube is fixedly installed through the outside of the top of the limiting box. A sealing cap is threadedly installed at the top of the storage box.

[0010] Furthermore, a diversion box is fixedly installed through the output end of the guide pipe, the spray guide assembly includes a drain pipe, the input end of the drain pipe is fixedly installed through the inside of one side of the diversion box, a guide groove is spirally opened inside the top of the umbrella skirt, and the output end of the drain pipe is located on one side of the initial end of the 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 compression ring and three cavity connecting blocks, the compression ring is externally sleeved on one side of the limiting box, the compression ring is vertically slidable 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 compression 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 compression ring and the outside of the 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 compression 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 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: 1. By triggering the setting of the liquid supply assembly and the spray guide assembly, the cable accessory can automatically start and quantitatively deliver the protective agent when it is in high temperature working condition. After the protective agent is delivered to the initial end of the guide groove of the spiral umbrella skirt, it can flow along the guide groove in a directional spiral flow. With the guidance of the spiral structure, it can cover the surface of the umbrella skirt and the cold shrink insulation pipe, reduce the dead angle of protection, and ensure that the key parts can be effectively protected. In addition, the covered protective agent can effectively isolate the direct erosion of high temperature on the materials of the umbrella skirt and the cold shrink insulation pipe, and can effectively fill the fine cracks on the surface of the two, prevent the cracks from further expanding, significantly slow down the aging speed of the materials, and solve the problem of dry cracking caused by high temperature from the root, thereby greatly prolonging the overall service life of the cable accessory; 2. The setting of the disassembly assembly provides strong flexibility and practicality for the maintenance of the cable accessory and the reuse of the assembly, reduces the maintenance cost and improves the operation efficiency. When the cable main body or the cold shrink insulation pipe and other cable core components are damaged, and the limiting box, the trigger liquid supply assembly and the spray guide assembly remain intact, these functional assemblies can be quickly disassembled from the damaged cable through the disassembly assembly without destructive disassembly. Then they can be directly assembled to the new cable main body, realizing the reuse of the core protection assembly, avoiding the scrapping of the functional assemblies due to the damage of the cable, greatly reducing the waste of parts, reducing the cost of equipment replacement, and at the same time, if the limiting box, the trigger liquid supply assembly or the spray guide assembly itself fails, the overall cold shrink cable terminal does not need to be disassembled, and the failed assembly can be disassembled alone through the disassembly assembly. After replacing the new functional assembly, it can be reassembled, which avoids the damage to the terminal key structures such as cold shrink insulation pipe and umbrella skirt caused by overall disassembly, realizes convenient disassembly, simplifies the maintenance process, shortens the maintenance time, and ensures the stable operation of the power system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure diagram of the present application; Figure 2 It is the partial cross-sectional perspective structure diagram of the limiting box and the liquid storage box of the present application; Figure 3 It is the partial cross-sectional perspective structure diagram of the present application; Figure 2 It is the enlarged structure diagram of position A in the middle; Figure 4 It is the partial cross-sectional perspective structure diagram of the suction cylinder and the extrusion cylinder of the present application; Figure 5 It is the perspective structure diagram of the cold shrink insulation pipe and the umbrella skirt of the present application; Figure 6 It is the perspective structure diagram of the cavity connecting block and the arc-shaped clamping block of the present application; Figure 5 It is the enlarged structure diagram of position B; Figure 7 It is the perspective structure diagram of the cavity connecting block and the arc-shaped clamping block of the present application; Figure 8 It is the perspective structure diagram of the cavity connecting block and the arc-shaped clamping block of the present application;Figure 7 Amplification structure schematic diagram at C; Figure 9 It is the partial section view solid structure schematic diagram of cavity connecting block and limiting block of the application; Figure 10 It is the overhead structure schematic diagram of limiting strip and compression ring.

[0018] In the drawings, the components represented by each reference numeral are listed as follows: 1, cable main body; 2, cold shrink insulation tube; 3, 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 groove; 31, arc abutting block; 32, mounting block; 33, limiting block; 34, double-sided tooth block; 35, gear; 36, limiting shaft; 37, tension spring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0020] Embodiment one: please refer to Figure 1 - Figure 6 An anti-aging cable accessory, comprising a cable main body 1, three cold shrink insulation tubes 2 fixedly connected at equal angles at the top end of the cable main body 1, and three terminal 3 fixedly connected at the top end of the three cold shrink insulation tubes 2, a limiting box 5 is arranged 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 main body 1, an installation cavity 6 is formed in the inside of the limiting box 5, a trigger liquid supply assembly for high-temperature trigger protection agent supply is arranged in the inside of the installation cavity 6, and a spray flow guide assembly for guiding the protection agent is arranged outside the three cold shrink insulation tubes 2 and in communication with the trigger liquid supply assembly; the trigger liquid supply assembly comprises a liquid storage box 7, a suction cylinder 8 and an extrusion cylinder 9, the liquid storage box 7 is fixedly installed on one side of the bottom wall of the installation cavity 6, the suction cylinder 8 is fixedly installed on one side of the side wall of the installation cavity 6 away from the liquid storage box 7, and the extrusion cylinder 9 is fixedly installed on one side of the side wall of the installation cavity 6 close to the suction cylinder 8.

[0021] The outer part of the cold shrinkage insulation tube 2 is sleeved with the umbrella skirt 4, and the umbrella skirt 4 is arranged in a spiral shape.

[0022] The bottom end of the extrusion cylinder 9 is sealingly and fixedly provided with a heat-conducting copper block 10, one end of the heat-conducting copper block 10 penetrates through the outside of one side of the limiting box 5, the bottom end of the extrusion cylinder 9 is slidingly and sealingly provided with a first piston block 11, and the cavity between the heat-conducting copper block 10 and the first piston block 11 is filled with a thermal expansion and cold shrinkage liquid, and the top end of the first piston block 11 is vertically fixedly provided with a connecting rod 12.

[0023] The top end of the connecting rod 12 is fixedly provided with a second piston block 13, the outer part of the connecting rod 12 is sleeved with a compression spring 14, both ends of the compression spring 14 are fixedly provided on the top end of the first piston block 11 and the bottom end of the suction cylinder 8 respectively, the second piston block 13 is slidingly and sealingly arranged in the bottom end of the suction cylinder 8, the top end of the suction cylinder 8 is fixedly provided with a flow guide pipe 15 and a liquid inlet pipe 22, the inside of one side of the liquid inlet pipe 22 is fixedly provided with a second one-way valve 23, the input end of the liquid inlet pipe 22 penetrates through and is fixedly provided in the inside of the bottom end of the liquid storage box 7, the inside of one side of the flow guide pipe 15 is fixedly provided with a first one-way valve 16, the output end of the flow guide pipe 15 penetrates through and is fixed on the outside of the top end of the limiting box 5, and the top end of the liquid storage box 7 is threadedly and sealingly provided with a sealing cover 24.

[0024] The output end of the flow guide pipe 15 penetrates through and is fixedly provided with a shunt box 17, the spraying flow guide assembly comprises a liquid discharge pipe 18, the input end of the liquid discharge pipe 18 penetrates through and is fixedly provided in the inside of one side of the shunt box 17, the inside of the top end of the umbrella skirt 4 is spirally provided with a flow guide groove 21, and the output end of the liquid discharge pipe 18 is arranged on one side of the initial end of the flow guide groove 21.

[0025] The outside of the top end and the bottom end of the liquid discharge pipe 18 is sleeved with a rubber connecting block 19, the side close to the cold shrinkage insulation tube 2 of the rubber connecting block 19 is fixedly provided with an arc-shaped plastic clamping block 20, and the plastic clamping block 20 is clamped and fixed on the outside of one side of the cold shrinkage insulation tube 2.

[0026] The cable accessory of the embodiment is convenient to install, mainly applied to power distribution lines exposed to high temperature outdoors, high-load motor cable connection ends in industrial workshops, and dense cable arrangement in closed cable trenches, and the like scenes prone to high temperature, in which the cable main body 1 bears large current for a long time, a large amount of Joule heat is easily generated, and the surface of the cold shrinkage insulation tube 2 and the umbrella skirt 4 is prone to dry cracking after superimposing environmental high temperature, and the accessory can automatically realize protection agent supply and covering through the cooperation of the liquid supply assembly and the spraying flow guide assembly, thereby relieving the above problems, and the specific working principle is as follows: 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 tube 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.) in the extrusion cylinder 9 between the heat-conducting copper block 10 and the first piston block 11 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, extrudes the compression spring 14 sleeved outside the connecting rod 12, 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 guide 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 guide pipe 15, the shunt box 17 uniformly distributes the protective agent to the three liquid outlet pipes 18 (the liquid outlet pipes 18 are fixed outside the cold shrink insulation tube 2 through the rubber connecting block 19 and the arc-shaped plastic clamping block 20, which ensures the position stability during transportation), and the output end of the liquid outlet pipe 18 corresponds to the initial end of the top guide groove 21 of the umbrella skirt 4. The protective agent flows along the spiral guide groove 21 in a directional manner, and covers the surface of the umbrella skirt 4 and the cold shrink insulation tube 2 by means of the guiding effect of the spiral structure, greatly reduces the dead angle of protection, 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 umbrella skirt 4 and the cold shrink insulation tube 2, simultaneously fills the fine cracks generated on the surface of the two, prevents the cracks from further expanding, significantly delays the material aging speed, solves the problem of dry cracking caused by high temperature from the root, and finally greatly prolongs the overall service life of the cable accessory.

[0027] It also needs to be explained that when the environmental 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 sleeved outside the connecting rod 12 releases the stored force, pulls the first piston block 11 to reset downward, the connecting rod 12 drives the second piston block 13 to move downward in the suction cylinder 8 synchronously, at this time, the protective agent (such as a silicone rubber maintenance agent, an 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 triggering spraying. In addition, the sealing cover 24 at the top end 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 triggering liquid supply assembly.

[0028] It should be noted 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 gaps. When assembling, special lubricating grease is applied to the contact between the connecting rod 12 and the sealing surface 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 gap between them and the corresponding cylinder wall is uniform, avoiding damage to the sealing effect due to uneven wear. By selecting the sealing material of the medium, precise machining and assembly lubrication and protection, the mutual leakage of the two liquids can be prevented, ensuring the air tightness and long-term stable operation of the trigger liquid supply assembly.

[0029] Example two: please refer to Figure 7 Figure 10 The present embodiment further illustrates example one, and the outside of the limiting box 5 is provided with a disassembly assembly for quickly disassembling the limiting box 5.

[0030] The disassembly assembly includes a compression ring 26 and three cavity connecting blocks 27. The compression ring 26 is sleeved on one side of the outside of the limiting box 5 and can slide vertically along the limiting box 5. The three cavity connecting blocks 27 are fixedly installed on one side of the outside of the limiting box 5 close to the three cold shrink insulation pipes 2. The bottom end of the outer side edge of the compression ring 26 is arc-shaped. A plurality of limiting strips 25 are fixedly installed on the outside of the limiting box 5 at equal angles. The inner wall of the compression ring 26 and the outer part of the plurality of limiting strips 25 are connected in a through sliding manner.

[0031] The outer part of the 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 slidingly and tightly installed with an arc-shaped abutting block 31. The top end of the arc-shaped abutting block 31 is arc-shaped. The top end of the arc-shaped abutting block 31 and the bottom end of one side of the compression ring 26 are tightly attached.

[0032] 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 to the bottom end of one side of the arc-shaped abutting block 31. The other end of the mounting block 32 is fixedly installed with a limiting block 33. The side of the limiting block 33 away from the mounting block 32 is fixedly installed with a double-sided tooth block 34. A tension spring 37 is fixedly connected between the side of the limiting block 33 and the inner wall of one side of the cavity connecting block 27.

[0033] The 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 engagedly connected to one side of the double-sided tooth block 34. The inner part of the gear 35 is fixedly installed with a limiting shaft 36. The two 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. ​

[0034] The disassembly and assembly assembly of the embodiment is mainly used in two core scenarios: one is when the cable body 1 or the cold shrink insulation tube 2 is damaged, and the limiting box 5, the trigger liquid supply assembly and the spraying guide assembly are still intact, these intact assemblies need to be disassembled and reused to the new cable; the second is when the limiting box 5 or its internal related functional assembly itself is damaged, without disassembling the entire cold shrink cable terminal, only the faulty components need to be disassembled, the overall operation does not require complex tools, realizes convenient disassembly and assembly, simplifies the maintenance process, shortens the repair time, guarantees the stable operation of the power system, and the specific working principle is as follows: 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, so that the pressure ring 26 will not deviate during the downward sliding process, and always moves 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, push 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 the direction away from the limiting box 5, and the mounting block 32 fixed at the bottom end of the arc-shaped abutting block 31 moves synchronously, drives the limiting block 33 and the double-sided tooth block 34 at the other end of the mounting block 32 to move transversely, at this time, the tensile spring 37 between the limiting block 33 and the inner wall of the cavity connecting block 27 is elongated 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, and then make the two arc-shaped clamping blocks 28 open 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, to ensure that the bottom surface of the limiting box 5 is in 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 extrude the cold shrink insulation tube 2, and there is no obstacle during the placement process, and there is no need to adjust the original position of the cold shrink insulation tube 2, after the alignment and placement are completed, the pressure ring 26 is loosened, at this time, the tensile spring 37 which is elongated immediately releases the stored energy, pulls the limiting block 33 to move in the direction close to the inner wall of the cavity connecting block 27, and the double-sided tooth block 34 fixed with the limiting block 33 moves synchronously, the mounting 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, and then drives the two arc-shaped clamping blocks 28 fixed with the gear 35 to move close 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, thereby completing the limiting box 5 and the related trigger liquid supply assembly and spraying guide assembly, and fixing them on the cable, the installation is completed.

[0035] It should be noted that when subsequent disassembly is required, the compression ring 26 is only needed to be slid downward again, so that the bottom end 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, so that the limiting box 5 and the associated components can be directly taken off from the cable, the reuse of the components or the individual replacement of the faulty components is realized, the whole process does not need to use screwdrivers, wrenches and other tools, the operation is convenient, and the cable terminal key structures such as the cold shrink insulation tube 2 and the umbrella skirt 4 are not damaged, and the whole is convenient to install and disassemble.

[0036] It should be noted that in this document, the terms“first” and“second” and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms“comprises,”“comprising,” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

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).

2. The anti-aging cable accessory according to claim 1, characterized in that: All three cold-shrink insulating tubes (2) are fitted with umbrella skirts (4), which are spiral-shaped.

3. The anti-aging cable accessory according to claim 2, characterized in that: 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).

4. The anti-aging cable accessory according to claim 3, characterized in that: 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).

5. The anti-aging cable accessory according to claim 4, 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).

6. The anti-aging cable accessory according to claim 5, 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).

7. 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.

8. The anti-aging cable accessory according to claim 7, 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).

9. The anti-aging cable accessory according to claim 8, 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).

10. The anti-aging cable accessory according to claim 9, 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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