A cable splitter
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-19
- Publication Date
- 2026-08-14
AI Technical Summary
其不足之处在于：此法剥皮长度需精准控制，导体连接点粗糙易松动（仅靠绞合或点压），接触电阻高，易因发热严重导致过热起火，构成巨大的安全隐患，绝缘密封也依赖于胶带缠绕，易老化渗水漏电
[0005]本实用新型使用时，确定主干电缆需放置于分线盒主干槽中的位置，按照第二槽体的长度剥除主干电缆的外皮；将处理好的主干电缆平行放置于下矩形盒的主干槽内，确保主干电缆的已剥皮导体段完全、准确地落入第二槽体内，并被下方的半圆铜管稳稳托住，主干电缆未剥皮的绝缘层部分嵌入对应的第一槽体和第三槽体内；确定分支电缆末端需放置于对应分支槽中的位置，按照第五槽体的长度剥除分支电缆的外皮后，将分支电缆的未剥皮绝缘层部分完全嵌入对应的第四槽体中，确保左侧支干电缆的已剥皮导体段端部位于半圆铜管与主干导体下侧之间，右侧支干电缆的已剥皮导体段端部与主干导体上侧接触；将上矩形盒小心地盖在下矩形盒上，使用工具依次、均匀、初步拧紧所有紧固件，目的在于使上下矩形盒合拢，固定住电缆的绝缘层部分，并初步压紧上下矩形盒内部的半圆铜管，使其夹持住主干导体和支干导体（端部）；使用合适的工具线从上矩形盒朝外的一侧操作压接螺钉，将螺钉依次旋入上矩形盒对应第二槽体位置的螺纹孔中；螺钉将穿过上矩形盒，穿过半圆铜管上的螺纹通孔，最终将支干导体紧压在主干导体上；再重复上述动作，拧紧另一侧的压接螺母，最后拧紧紧固件完成安装工作。
Smart Images
Figure CN224637726U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cable splitting technology, and specifically relates to a cable splitter. Background Technology
[0002] In many fields such as low-voltage power distribution networks, communication networks, and internal equipment wiring, reliably and efficiently branching a main cable into multiple branch cables is an extremely common and critical operation. Early or low-cost solutions often involved directly cutting a "T" shaped opening in the insulation of the main cable, then bare-wrapping, welding, or crimping the branch conductors onto the main conductor using rudimentary clamps, and finally wrapping them with insulating tape. The drawbacks of this method are: the stripping length requires precise control; the conductor connections are rough and prone to loosening (relying solely on stranding or point pressing); the contact resistance is high, easily leading to overheating and fire, posing a significant safety hazard; and the insulation sealing also relies on tape wrapping, which is prone to aging, water leakage, and electrical leakage. Utility Model Content
[0003] The purpose of this invention is to provide a cable splitter that strictly separates the insulation layer fixing area from the conductor connection area, protecting the insulation layer from damage during connection operations (crimping, metal components), while providing optimized space and contact surface for conductor connection.
[0004] The purpose of this utility model is achieved as follows: A cable splitter, characterized in that it includes two rectangular boxes arranged vertically opposite each other. A main trunk groove is formed along the length of the inner side of each rectangular box. The main trunk groove includes a first groove, a second groove, and a third groove connected in sequence. A semi-circular copper tube is provided on the second groove. Several branch grooves are formed along the width of the inner side of each rectangular box. These branch grooves are symmetrically distributed in pairs on both sides of the main trunk groove. Each branch groove includes a fourth groove and a fifth groove connected in sequence. Each fifth groove is connected to the second groove. A semi-circular hole is formed in the semi-circular copper tube corresponding to the second groove. Several screws are threadedly connected to the outer side of the rectangular box corresponding to the second groove. Threaded through holes are formed in the semi-circular copper tube corresponding to the screws. The screws pass through the rectangular box and contact the main conductor and branch conductors. The two rectangular boxes are connected as one unit by several fasteners.
[0005] In use, this invention determines the position where the main cable needs to be placed in the main trunk of the junction box. The outer sheath of the main cable is stripped according to the length of the second trunk. The prepared main cable is placed parallel to the main trunk of the lower rectangular box, ensuring that the stripped conductor section of the main cable falls completely and accurately into the second trunk and is firmly supported by the semi-circular copper tube below. The unstripped insulation layer of the main cable is embedded in the corresponding first and third trunks. The position where the branch cable ends need to be placed in the corresponding branch trunk is determined. After stripping the outer sheath of the branch cable according to the length of the fifth trunk, the unstripped insulation layer of the branch cable is completely embedded in the corresponding fourth trunk, ensuring that the stripped conductor end of the left branch cable is located between the semi-circular copper tube and the lower side of the main conductor. The stripped conductor end of the right-side branch cable contacts the upper side of the main conductor. Carefully place the upper rectangular box over the lower rectangular box, and use tools to tighten all fasteners sequentially, evenly, and initially. The purpose is to close the upper and lower rectangular boxes, fix the cable insulation layer, and initially press the semi-circular copper tubes inside the upper and lower rectangular boxes to clamp the main conductor and the branch conductor (end). Using a suitable tool wire, operate the crimping screws from the outward side of the upper rectangular box, and screw the screws sequentially into the threaded holes corresponding to the second slot positions of the upper rectangular box. The screws will pass through the upper rectangular box, through the threaded through holes on the semi-circular copper tubes, and finally press the branch conductor tightly onto the main conductor. Repeat the above actions to tighten the crimping nuts on the other side, and finally tighten the fasteners to complete the installation.
[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: the downward pressure transmitted by the screw forces the semi-circular copper tube to press down, ensuring that its inner arc surface presses against the main conductor, and its semi-circular hole presses against the end of the branch conductor. The screw tip eventually directly contacts the main conductor, further increasing the clamping force and providing a continuous conductive path with low resistance and high current carrying capacity. The high conductivity and good heat dissipation of the copper tube ensure stable and reliable electrical performance of the connection. The concave surface of the semi-circular copper tube helps to form surface contact between conductors, which is more uniform and effective than the point / line contact produced by pure clamps or crimp sleeves, with lower contact resistance and less heat generation. The cable insulation layer is fixed and pressure-bearing by special grooves (first, third, and fourth grooves). The screw pressure is ultimately applied to the conductor rather than the insulation layer through the copper tube, protecting the critical insulation parts from being crushed or cut. The entire connection point is completely enclosed by the upper and lower rectangular boxes, providing all-round electrical isolation and environmental protection.
[0007] As a further improvement of this utility model, a positioning cylinder is provided on the outer side of the rectangular box corresponding to the outer periphery of the screw, and the positioning cylinder is made of rigid insulating material.
[0008] As a further improvement of this utility model, the cross-sections of the first, third, fourth, and fifth grooves are all semi-circular.
[0009] As a further improvement of this utility model, the inner diameters of the first and third grooves are adapted to the outer diameter of the main cable, the inner diameter of the semi-circular copper tube is adapted to the outer diameter of the main conductor, the inner diameter of the fourth groove is adapted to the outer diameter of the branch cable, and the inner diameter of the fifth groove is adapted to the outer diameter of the branch conductor.
[0010] As a further improvement of this utility model, the second tank has a rectangular cross-section, and the semi-circular copper tube is installed in the second tank through several fixed seats.
[0011] As a further improvement of this utility model, several of the fasteners are four bolts arranged in a rectangular pattern. Mounting holes are provided at the four corners of the lower rectangular box, and countersunk holes are provided at the four corners of the upper rectangular box corresponding to the mounting holes. Internal threads are provided inside the mounting holes and countersunk holes.
[0012] As a further improvement of this utility model, when the two rectangular boxes are connected as one unit, an elastic dust plug is provided at the end of the fourth groove facing outward.
[0013] As a further improvement of this utility model, the connection angle between the fifth groove and the second groove is 90°. Attached Figure Description
[0014] Figure 1 This is a top view of Embodiment 1 of the present utility model.
[0015] Figure 2 This is a top view of Embodiment 1 of the present invention (excluding the upper rectangular box).
[0016] Figure 3 for Figure 1 Sectional view at point AA.
[0017] Figure 4 This is a top view of Embodiment 2 of the present invention (excluding the upper rectangular box).
[0018] Figure 5 This is a front view of Embodiment 2 of the present invention.
[0019] Figure 6 This is a right view of Embodiment 2 of the present invention.
[0020] Among them, 1 is a rectangular box, 2 is a main trunk, 201 is the first trunk body, 202 is the second trunk body, 203 is the third trunk body, 3 is a semi-circular copper tube, 301 is a semi-circular hole, 302 is a threaded through hole, 4 is a branch trunk, 401 is the fourth trunk body, 402 is the fifth trunk body, 5 is a screw, 6 is a bolt, 7 is a mounting hole, 8 is a positioning cylinder, 9 is a fixing seat, 10 is a dust plug, 11 is a main trunk cable, 12 is a branch cable, 13 is a main trunk conductor, and 14 is a branch conductor. Detailed Implementation Example 1
[0021] like Figure 1-3 As shown, a cable splitter includes two rectangular boxes 1 arranged vertically opposite each other. A main trunk 2 is formed along the length of the inward-facing side of each rectangular box 1. The main trunk 2 includes a first groove 201, a second groove 202, and a third groove 203 connected in sequence. A semi-circular copper pipe 3 is installed on the second groove 202. Six branch grooves 4 are formed along the width of the inward-facing side of each rectangular box 1. The six branch grooves 4 are symmetrically distributed in pairs on both sides of the main trunk 2. Each branch groove 4 includes a fourth groove 401 and a fifth groove 402 connected in sequence. All six fifth grooves 402 are connected to the second groove 202 and are connected to each other. The included angle is 90°. The semi-circular copper tube 3 has a semi-circular hole 301 corresponding to the second groove 202. Three screws 5 are threadedly connected to the outer side of the rectangular box 1 corresponding to the second groove 202. The semi-circular copper tube 3 has a threaded through hole 302 corresponding to the screws 5. The screws 5 pass through the rectangular box 1 and the semi-circular copper tube 3 and contact the main conductor 13 and the branch conductor 14. The two rectangular boxes 1 are connected as one unit by four bolts 6 distributed in a rectangular shape. The lower rectangular box has mounting holes 7 at the four corners. The upper rectangular box has countersunk holes corresponding to the mounting holes 7 at the four corners. The mounting holes 7 and the countersunk holes have internal threads.
[0022] To ensure a uniform pressure distribution on the main conductor 13 and branch conductor 14 applied by the screw 5, a positioning cylinder 8 is provided on the outer side of the rectangular box 1 corresponding to the outer periphery of the screw 5. The positioning cylinder 8 is made of rigid insulating material, forming an insulating barrier between the head of the screw 5 and the external environment of the rectangular box. The height of the inner bottom surface of the positioning cylinder 8 needs to be precisely calculated. When the screw 5 is tightened until its head is completely sunk into and against the bottom of the cylinder, it means that the maximum allowable stroke has been reached, thus avoiding overpressure.
[0023] The first trench 201, the third trench 203, the fourth trench 401, and the fifth trench 402 all have semi-circular cross-sections. By dispersing stress through the large curvature arc surface, stress concentration points are eliminated, thus solving the problems of cable installation damage and long-term fretting wear.
[0024] The inner diameters of the first and third grooves 201 and 203 are both adapted to the outer diameter of the main cable 11. The inner diameter of the fourth groove 401 is adapted to the outer diameter of the branch cable 12. After the upper and lower rectangular boxes are closed, the insulation layer contacts the groove wall 360° without dead angles, achieving zero-gap wrapping. The inner diameter of the semi-circular copper tube 3 is adapted to the outer diameter of the main conductor 13, and the rigid support of the main conductor 13 can suppress flutter. The inner diameter of the fifth groove 402 is adapted to the outer diameter of the branch conductor 14, and the full constraint fixation of the conductor can eliminate fretting wear.
[0025] The second tank 202 has a rectangular cross-section. The semi-circular copper tube 3 is installed in the second tank 202 through four fixing seats 9, which allows the axial thermal expansion of the semi-circular copper tube 3 while constraining the radial displacement of the semi-circular copper tube 3. Example 2
[0026] The difference between this embodiment and embodiment one is that: if only three branch cables 12 are connected to the main cable 11, the three branch cables 12 are preferably placed on the same side (left side). When the two rectangular boxes 1 are connected as one unit, an elastic insulating dust plug 10 is provided on the right side of the rectangular box corresponding to the fourth groove 401 facing outward, so as to improve the overall sealing performance.
[0027] When connecting branch cable 12, the rigid insulating cylinder provides a precise radial limiting space for the head of screw 5 and the upper part of the screw, forcibly restricting screw 5 to move only in the axial direction, preventing any radial wobble or tilting, and guiding screw 5 to be screwed in absolutely perpendicular to the rectangular box surface and parallel to the main conductor 13, ensuring that the pressure is effectively and evenly transmitted axially to the bottom guiding structure (semi-circular copper tube 3) and the conductor. The advantages of this utility model are: by tightening screw 5, the crimping force can be precisely controlled (with threaded limit to prevent overpressure), and the operator can intuitively feel the degree of tightening; when it is necessary to disconnect branch cable 12 or for inspection and maintenance, only screw 5 and bolt 6 need to be loosened, which is non-destructive and can be restored; the semi-circular copper tube 3 serves as the main passage, and the crimping of screw 5 ensures tight contact and maintainable pressure, resulting in low contact surface resistance. The enclosed rectangular box environment also reduces the possibility of oxidation and corrosion.
[0028] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.
Claims
1. A cable splitter, characterized by The device comprises two rectangular boxes arranged vertically opposite each other. A main channel is formed along the length of the inward-facing side of each rectangular box. The main channel includes a first channel, a second channel, and a third channel connected in sequence. A semi-circular copper tube is mounted on the second channel. Several branch channels are formed along the width of the inward-facing side of each rectangular box, symmetrically distributed in pairs on both sides of the main channel. Each branch channel includes a fourth channel and a fifth channel connected in sequence. Each fifth channel is connected to the second channel. A semi-circular hole is formed in the semi-circular copper tube corresponding to the second channel. Several screws are threadedly connected to the outward-facing side of the rectangular box corresponding to the second channel. Threaded through holes are formed in the semi-circular copper tube corresponding to the screws. The screws pass through the rectangular box and contact the main conductor and branch conductors. The two rectangular boxes are connected as one unit by several fasteners.
2. A cable distributor according to claim 1, characterised in that A positioning cylinder is provided on the outer side of the rectangular box corresponding to the outer periphery of the screw. The positioning cylinder is made of rigid insulating material.
3. A cable distributor according to claim 1, wherein, The first, third, fourth, and fifth grooves all have semi-circular cross-sections.
4. A cable distributor according to claim 1, wherein, The inner diameters of the first and third trenches are adapted to the outer diameter of the main cable, the inner diameter of the semi-circular copper tube is adapted to the outer diameter of the main conductor, the inner diameter of the fourth trench is adapted to the outer diameter of the branch cable, and the inner diameter of the fifth trench is adapted to the outer diameter of the branch conductor.
5. A cable splitter according to claim 1, characterized in that, The second tank has a rectangular cross-section, and the semi-circular copper tube is installed in the second tank through several fixed seats.
6. A cable distributor according to claim 1, wherein, The fasteners consist of four bolts arranged in a rectangular pattern. Mounting holes are provided at the four corners of the lower rectangular box, and countersunk holes are provided at the four corners of the upper rectangular box corresponding to the mounting holes. Internal threads are provided inside the mounting holes and countersunk holes.
7. A cable distributor according to claim 1, wherein, When the two rectangular boxes are connected as one unit, an elastic dust plug is provided at the outward end of the fourth groove.
8. A cable distributor according to claim 1, wherein, The connection angle between the fifth tank and the second tank is 90°.