Prefabricated cold shrinkage outdoor terminal

Abstract

The utility model relates to the technical field of electric power, in particular to a prefabricated cold contraction outdoor terminal which comprises a cold contraction assembly and a three-core cable fork angle adjusting mechanism arranged on the cold contraction assembly. The three prefabricated neck tubes are arranged at the outer ends of the end cold shrinkage tubes; and the three cold shrinkage outer tubes are arranged on three copper core wires of the cable. The end cold contraction pipe is actively wrapped outside the cable insulation end through the multiple hook and loop fasteners, after the three-phase copper core wire penetrates through the three prefabricated neck pipes, the three-phase copper core wire which is stretched outwards can be effectively adjusted in the pipe installation period, the three-core cable fork angle adjusting mechanism is used for providing outward expansion force for the three prefabricated neck pipes, and therefore the cable insulation end can be effectively adjusted in the pipe installation period. At the moment, the three-phase copper core wire can be kept at a constant angle after tubing, so that the copper core wire with stress is prevented from damaging the insulated rubber tape and the cold shrink tube.

Description

Technical Field

[0001] This utility model relates to the field of power technology, specifically a prefabricated cold-shrink outdoor terminal. Background Technology

[0002] Prefabricated cold-shrink outdoor terminals are electrical connectors that connect wires and terminals together. They mainly use special materials and structural designs to enable long-term stable communication and power transmission in outdoor environments.

[0003] Because cold shrink terminals are made of elastomer materials and vulcanized in the factory, they are prone to wear due to increased external forces. As the three copper core wires inside the cable are exposed and expand outward, the copper core wires are pulled outward and wrapped with insulating tape, which causes stress on the insulating tape or cold shrink terminal. In severe cases, this can lead to wear and breakage of the cold shrink terminal.

[0004] In view of this, a prefabricated cold-shrink outdoor terminal was designed to solve the above problems. Utility Model Content

[0005] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted by this utility model is as follows:

[0007] A prefabricated cold-shrink outdoor terminal includes a cold-shrink assembly and a three-core cable fork angle adjustment mechanism disposed on the cold-shrink assembly. The cold-shrink assembly includes an end cold-shrink tube, three prefabricated neck tubes disposed at the outer end of the end cold-shrink tube, and three cold-shrink outer tubes disposed on the three copper core wires of the cable. The three-core cable fork angle adjustment mechanism includes a base disposed between the three prefabricated neck tubes and three sets of angle pressing assemblies disposed within the base.

[0008] In a preferred embodiment, the present invention can be further configured as follows: the three-core cable fork angle adjustment mechanism further includes three baffles disposed on the base, pads disposed at the inner end of the base, and a limiting rod installed in the pads;

[0009] A nut is provided on the threaded section of the limiting rod, and a pressure-increasing block is provided on the outside of the limiting rod;

[0010] The limiting rod is provided with a spring on its outside, with one end of the spring pressing against the pad and the other end of the spring pressing against the inner end of the pressure block.

[0011] In a preferred embodiment, the present invention can be further configured such that the pressure angle assembly includes a baffle, an extrusion column disposed on the baffle, a bolt disposed at the inner end of the extrusion column, and a compression spring disposed outside the extrusion column.

[0012] One end of the compression spring is pressed against the end of the compression column, and the other end of the compression spring is pressed against the baffle.

[0013] In a preferred embodiment, the present invention can be further configured such that the cold shrink assembly also includes four pre-compressed Velcro straps;

[0014] The inner walls of both ends of the end shrink tube are provided with four symmetrically distributed tape-changing grooves.

[0015] The four pre-compressed hook and loop tapes are fitted through the four tape changing slots.

[0016] In a preferred embodiment, the present invention can be further configured such that: a first reinforcing neck sleeve is provided at the outer end of the prefabricated neck tube;

[0017] The inner end of the cold shrink tubing is provided with a second reinforcing neck sleeve;

[0018] Both the first and second reinforced neck braces have a T-shaped structure and are made of thickened plastic.

[0019] In a preferred embodiment, the present invention can be further configured such that the cold shrink assembly also includes three adapters;

[0020] Both ends of the adapter are provided with inwardly recessed annular slots.

[0021] The outer ends of the first and second reinforcing neck sleeves are fitted into the annular slots at both ends of the adapter.

[0022] In a preferred embodiment, the present invention can be further configured such that: the triangular end plate of the pad is adapted to be snapped into the groove at the inner end of the base, and fixing bolts are provided in the three end plates of the pad.

[0023] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0024] 1. This utility model uses multiple Velcro straps to actively wrap the cold shrink tubing around the outside of the cable insulation end. As the three copper core wires pass through three prefabricated neck tubes, the outwardly stretched three copper core wires can be effectively adjusted during tube installation. The three-core cable fork angle adjustment mechanism provides outward expansion force to the three prefabricated neck tubes. At this time, the three copper core wires can maintain a constant angle after tube installation, so as to avoid the copper core wires under stress from damaging the insulating tape and cold shrink tubing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram illustrating the use of this utility model;

[0026] Figure 2 This is a schematic diagram of the cold shrink assembly of this utility model;

[0027] Figure 3 This utility model Figure 2 A partial cross-sectional schematic diagram;

[0028] Figure 4 This is a cross-sectional schematic diagram of the end-shrink tubing of this utility model;

[0029] Figure 5 This is a schematic diagram of the three-core cable fork angle adjustment mechanism of this utility model;

[0030] Figure 6 This is an exploded view of the corner pressing component of this utility model.

[0031] Figure label:

[0032] 100. Cold shrink assembly; 110. Cold shrink tubing end; 120. Tape changing groove; 130. Pre-compressed Velcro tape; 140. Pre-fabricated neck tube; 150. First reinforcing neck sleeve; 160. Adapter; 170. Second reinforcing neck sleeve; 180. Cold shrink outer tube;

[0033] 200. Three-core cable fork angle adjustment mechanism; 210. Base; 220. Baffle; 230. Foot pad; 240. Limiting rod; 250. Spring; 260. Pressure block; 270. Nut; 280. Angle pressing assembly; 281. Baffle plate; 282. Extrusion column; 283. Bolt; 284. Compression spring. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0035] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0036] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a prefabricated cold-shrink outdoor terminal.

[0037] Example 1:

[0038] Combination Figures 1-6 As shown, the present invention provides a prefabricated cold-shrink outdoor terminal, including a cold-shrink assembly 100 and a three-core cable fork angle adjustment mechanism 200 disposed on the cold-shrink assembly 100. The cold-shrink assembly 100 is used to provide sealing protection for the three copper core wires inside the cable, and the three-core cable fork angle adjustment mechanism 200 is used to provide anti-inward shrinkage support for the three copper core wires after installation in the conduit.

[0039] The cold shrink assembly 100 includes an end cold shrink tube 110 and four pre-compressed Velcro tapes 130, three pre-formed neck tubes 140 disposed at the outer end of the end cold shrink tube 110, and three cold shrink outer tubes 180 disposed on the three copper core wires of the cable.

[0040] The inner walls of both ends of the end cold shrink tubing 110 are provided with four symmetrically distributed tape-changing grooves 120;

[0041] Four pre-pressed Velcro straps 130 fit through to four strap replacement slots 120;

[0042] The three-core cable fork angle adjustment mechanism 200 includes a base 210 disposed between three prefabricated neck tubes 140 and three sets of angle pressing components 280 disposed within the base 210.

[0043] The corner pressing assembly 280 includes a baffle 281, a pressing post 282 disposed on the baffle 281, a bolt 283 disposed at the inner end of the pressing post 282, and a compression spring 284 disposed outside the pressing post 282;

[0044] One end of the compression spring 284 is pressed against the end of the compression column 282, and the other end of the compression spring 284 is pressed against the baffle 281.

[0045] After the three copper core wires inside the cable are stripped out, the cut material outside the copper core wires is polished with tools such as a file. Then, the three copper core wires are separated from the insulation end with insulating tape. Next, the three prefabricated neck tubes 140 and the end cold shrink tubes 110 are installed on the outside of the insulation end and the three copper core wires. Then, the four pre-compressed Velcro tapes 130 can be pulled tight until the end cold shrink tubes 110 are completely wrapped around the outside of the insulation end. At this time, the three prefabricated neck tubes 140 will also effectively wrap the three copper core wires.

[0046] Next, the three copper core wires are further wrapped with three adapters 160 and three cold shrink tubes 180. Then, the three-core cable fork angle adjustment mechanism 200 is inserted into the gap of the three prefabricated neck tubes 140 until the three baffles 281 effectively clamp the three prefabricated neck tubes 140. According to the angle requirement of the three copper core wires, the wrench can be used to adjust the nut 270 clockwise until the pressure block 260 is pressed and simultaneously squeezes the three compression columns 282 to extend outward. At this time, the three baffles 281 can provide effective angle adjustment support for the three copper core wires.

[0047] Example 2:

[0048] Combination Figures 2-4 As shown, based on Embodiment 1, the cold shrink assembly 100 also includes three adapters 160, and the outer end of the prefabricated neck tube 140 is provided with a first reinforcing neck sleeve 150.

[0049] The inner end of the cold shrink outer tube 180 is provided with a second reinforcing neck sleeve 170;

[0050] Both the first reinforcing neck brace 150 and the second reinforcing neck brace 170 have a T-shaped structure, and both the first reinforcing neck brace 150 and the second reinforcing neck brace 170 are made of thickened plastic.

[0051] Both ends of the adapter 160 are provided with inwardly recessed annular slots.

[0052] The outer ends of the first reinforcing neck sleeve 150 and the second reinforcing neck sleeve 170 are fitted into the annular slots at both ends of the adapter 160.

[0053] Preferably, according to actual needs, sealing gaskets can be added to the inner walls of the annular slots at both ends of the adapter 160. After the first reinforcing neck sleeve 150 and the second reinforcing neck sleeve 170 are respectively inserted into the two ends of the adapter 160, the gaps at both ends of the adapter 160 can be wrapped with insulating tape. At this time, the cold shrink outer tube 180 and the prefabricated neck tube 140 after cutting can avoid the burrs at the cut from scratching the insulating tape.

[0054] Example 3:

[0055] Combination Figure 5 and Figure 6 As shown, based on Embodiment 1, the three-core cable fork angle adjustment mechanism 200 also includes three baffles 220 disposed on the base 210, a pad 230 disposed at the inner end of the base 210, and a limiting rod 240 installed in the pad 230.

[0056] A nut 270 is provided on the threaded section of the limiting rod 240, and a pressure block 260 is provided on the outside of the limiting rod 240;

[0057] A spring 250 is provided on the outside of the limiting rod 240, and one end of the spring 250 is pressed on the pad 230, while the other end of the spring 250 is pressed on the inner end of the pressure block 260.

[0058] The triangular end plate of the foot 230 is fitted into the groove at the inner end of the base 210, and fixing bolts are provided in the three end plates of the foot 230.

[0059] Preferably, both the base 210 and the baffle 281 are made of stainless steel, and both the base 210 and the baffle 281 are coated with an insulating varnish layer.

[0060] The base 210 has a frustum-shaped recess at its outer end, and the inner end of the pressure block 260 is adapted to the frustum-shaped recess to provide extrusion force to the inclined ends of the three extrusion columns 282.

[0061] The working principle and usage process of this utility model: After the three copper core wires inside the cable are stripped and exposed, the exposed three copper core wires and the cut part of the insulation layer can be wrapped in advance using insulating tape and insulating adhesive tape.

[0062] After the three copper core wires are pre-wrapped, the end cold shrink tube 110 can be inserted along the exposed ends of the three copper core wires. After the end cold shrink tube 110 is completely wrapped around the outside of the insulated end, the exposed ends of the four pre-compressed hook and loop tapes 130 can be stretched outward. At this time, after the four evenly distributed pre-compressed hook and loop tapes 130 are fully tightened, they can be fixed and wrapped around the outside of the cable with insulating tape. Then, the three adapters 160 are inserted into the outside of the three copper core wires.

[0063] Until the first reinforcing neck sleeve 150 set at the outer end of the prefabricated neck tube 140 is snapped into a port of the adapter 160, the cold shrink outer tube 180 is then inserted along the three copper core wires until the three second reinforcing neck sleeves 170 set at the inner end of the three cold shrink outer tubes 180 are snapped into the three adapters 160. At this time, the cold shrink outer tube 180, the prefabricated neck tube 140 and the end cold shrink tube 110 can effectively seal and wrap the cable insulation end and the exposed three copper core wires.

[0064] Then, the three-core cable fork angle adjustment mechanism 200 is assembled along the gaps of the three prefabricated neck tubes 140. At this time, the three baffles 281 set in the three slots of the base 210 will adapt to the pressure of the three prefabricated neck tubes 140. As the nut 270 is rotated clockwise by the wrench, the nut 270 will squeeze the pressure block 260 to shrink inward along the limit rod 240. At this time, the three evenly distributed compression columns 282 will be compressed and extend outward. At this time, the three baffles 281 will be subjected to constant thrust and apply constant extension force to the three prefabricated neck tubes 140, thereby avoiding the insulation tape or insulation rubber tape from being damaged due to stress in the three copper core wires.

[0065] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pre-fabricated cold shrink outdoor terminal comprising a cold shrink assembly (100), characterized in that, The three-core cable fork angle adjusting mechanism (200) is arranged on the cold shrink assembly (100); The cold shrink assembly (100) comprises a head cold shrink tube (110), three prefabricated neck tubes (140) arranged at the outer ends of the head cold shrink tube (110), and three cold shrink outer tubes (180) arranged on the three-core cable. The three-core cable fork angle adjusting mechanism (200) comprises a base (210) arranged between the three prefabricated neck tubes (140) and three sets of angle pressing assemblies (280) arranged in the base (210).

2. A preformed cold shrink outdoor terminal according to claim 1, wherein, The three-core cable fork angle adjusting mechanism (200) further comprises three baffles (220) arranged on the base (210), a foot pad (230) arranged at the inner end of the base (210), and a limiting rod (240) installed in the foot pad (230). A nut (270) is arranged on the threaded section of the limiting rod (240), and a booster block (260) is arranged outside the limiting rod (240). A spring (250) is arranged outside the limiting rod (240), one end of the spring (250) is pressed against the foot pad (230), and the other end of the spring (250) is pressed against the inner end of the booster block (260).

3. A preformed cold shrink outdoor terminal according to claim 1, wherein, The angle pressing assembly (280) comprises a baffle (281), an extrusion column (282) arranged on the baffle (281), a bolt (283) arranged at the inner end of the extrusion column (282), and a compression spring (284) arranged outside the extrusion column (282). One end of the compression spring (284) is pressed against the end of the extrusion column (282), and the other end of the compression spring (284) is pressed against the baffle (281).

4. A preformed cold shrink outdoor terminal according to claim 1, wherein, The cold shrink assembly (100) further comprises four pre-pressed magic tape bands (130); The inner walls of both ends of the head cold shrink tube (110) are provided with four symmetrically distributed band replacement grooves (120); The four pre-pressed magic tape bands (130) are adapted to penetrate into the four band replacement grooves (120).

5. A preformed cold shrink outdoor terminal according to claim 1, wherein, The outer end of the prefabricated neck tube (140) is provided with a first reinforced neck sleeve (150); The inner end of the cold shrink outer tube (180) is provided with a second reinforced neck sleeve (170); The first reinforced neck sleeve (150) and the second reinforced neck sleeve (170) are both in T-shaped structure, and the first reinforced neck sleeve (150) and the second reinforced neck sleeve (170) are made of thickened plastic.

6. A preformed cold shrink outdoor terminal according to claim 5, wherein, The cold shrink assembly (100) further comprises three adapters (160); Both ends of the adapter (160) are provided with inwardly recessed annular insertion grooves; The outer ends of the first reinforced neck sleeve (150) and the second reinforced neck sleeve (170) are adapted to be clamped into the annular insertion grooves at both ends of the adapter (160).

7. A preformed cold shrink outdoor terminal according to claim 2, wherein, The triangular end plates of the foot pad (230) are adapted to be clamped into the notches at the inner end of the base (210), and the foot pad (230) is provided with fixing bolts in the three end plates.

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