Composite low-voltage branch cable

Abstract

The invention relates to the technical field of branch cables, and provides a composite low-voltage branch cable, which comprises a branch area, a conductor supporting mechanism, a connecting line, an insulating sheath and a butt-joint clamping mechanism, and is characterized in that the branch area is arranged on the composite cable, a plurality of wires are exposed in the branch area, and the conductor supporting mechanism is fixedly arranged in the branch area; the conductor supporting mechanism is used for supporting and fixing the wires, the connecting wires and the wires are in one-to-one correspondence, the connecting wires and the wires are detachably connected through the conductor supporting mechanism, the insulating sheath is arranged on the branch area in a sleeving mode, the insulating sheath is connected with an insulating layer on the composite cable, and the butt-joint clamping mechanism is arranged on the insulating sheath. The butt-joint clamping mechanism is detachably connected with the branch line, the butt-joint clamping mechanism is used for detachably connecting the branch line with the connecting line, and through the technical scheme, the problem that branch cables used when the composite low-voltage cable is branched in the prior art are many in style or large in size is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of branch cables, and in particular to a composite low-voltage branch cable. Background Art

[0002] Branch cable is a cable used to connect the distribution network of electrical equipment. It is widely used in construction, industry and other places that require power distribution. Its main feature is that the branch line is pre-manufactured on the trunk cable, which greatly shortens the construction period, reduces material cost and construction cost, and ensures the reliability of power distribution. The branch cable is composed of several parts: trunk cable, branch line and branch connector. The trunk cable has a large cross-sectional area to meet the power demand. The branch connector is set on the trunk cable to connect the trunk cable and the branch line to ensure the stability of power transmission. The power is transmitted to the electrical equipment through the branch cable. By manufacturing the cable branches in advance, the pre-branch cable is manufactured. The pre-branch cable can be used directly when the cable branch is needed, which improves the sealing and stability of the cable branch.

[0003] The composite low-voltage branch cable is a cable that combines power transmission and fiber-optic communication functions. It is widely used in smart grids, power fiber-to-the-home and other fields. It is designed to improve the efficiency and reliability of power distribution, while supporting high-speed data transmission to meet the dual needs of modern society for power and communication. The power transmission cable in the composite low-voltage cable is usually composed of copper or aluminum conductors. When power transmission branches are required, the specifications and quantity of the conductors may vary according to different power requirements. Each conductor is wrapped with an insulating layer, and the conductors can be selected for branching according to needs. However, due to the diversity of conductors, only one conductor can be branched on the traditional branch cable, which requires preparing multiple branch cables, or the branch cable will be provided with a branch line for each conductor, which will cause waste, and the branch on the branch cable is large in size and not conducive to installation. Therefore, in order to use the composite low-voltage cable for power transmission branches more conveniently, we propose a composite low-voltage branch cable. Summary of the invention

[0004] The present invention provides a composite low-voltage branch cable, which solves the problem in the prior art that the branch cables used in the composite low-voltage cable branching are too many in style or too large in volume.

[0005] The technical solution of the present invention is as follows: A composite low-voltage branch cable comprises a composite cable, wherein a plurality of conductors of different sizes are arranged in the composite cable, and the composite cable further comprises a branch area, a conductor support mechanism, a connecting wire, an insulating sheath and a butt clamping mechanism, wherein the branch area is opened on the composite cable, a plurality of the conductors are exposed in the branch area, the conductor support mechanism is fixedly arranged in the branch area, the conductor support mechanism is detachably connected to the plurality of the conductors, the conductor support mechanism is used to support and fix the conductors, a plurality of connecting wires are arranged, the connecting wires correspond to the conductors one-to-one, the connecting wires are detachably connected to the conductors through the conductor support mechanism, the insulating sheath is sleeved on the branch area, the insulating sheath is connected to the insulating layer on the composite cable, a plurality of butt clamping mechanisms are arranged, the plurality of butt clamping mechanisms correspond to the conductors one-to-one, the butt clamping mechanism is arranged on the insulating sheath, a branch wire is detachably connected to the butt clamping mechanism, and the butt clamping mechanism is used to detachably connect the branch wire to the connecting wire.

[0006] The conductor support mechanism includes a clamping conductive component and a conductor fixing component. The clamping conductive component is provided in plurality, and the plurality of the clamping conductive components are staggered in the branch area. The clamping conductive component is detachably connected to the conductor, and the clamping conductive component is used to clamp and connect the conductor and the connecting line, wherein the insulating layer of the portion of the conductor in contact with the clamping conductive component is removed, and the conductor fixing component is provided in the branch area, and the conductor fixing component is detachably connected to the plurality of the conductors, and the conductor fixing component is used to fix the plurality of the conductors.

[0007] The clamping conduction component includes a C-type clamp 1, an insulating plate and a C-type clamp 2. The C-type clamp 1 is arranged between a plurality of the wires, the C-type clamp is set on one of the wires, the insulating plate is fixedly arranged on the C-type clamp 1, the C-type clamp 2 is set on the connecting wire, and the C-type clamp 2 is detachably connected to the C-type clamp 1.

[0008] The conductor fixing assembly includes a positioning plate, an anti-twist rod and a clamping member. There are multiple positioning plates, and the positioning plates are detachably connected to the multiple conductors. The multiple positioning plates are spaced apart from the clamping conductive assembly. The anti-twist rod passes through the multiple positioning plates. There are multiple clamping members, and the clamping members are detachably arranged on the anti-twist rod. The clamping members are arranged on both sides of the positioning plate.

[0009] The docking clamping mechanism includes a branch frame, a docking frame, a conduction component and a crimping component. The branch frame is fixedly arranged on the insulating sheath. The branch frame corresponds to the clamping conduction component one by one. The branch frame is sleeved on the clamping conduction component. The docking frame is fixedly arranged on the docking frame. The branch line is detachably connected to the docking frame. The conduction component is fixedly arranged in the docking frame. The conduction component is connected to the connecting line. The conduction component conducts electricity between the branch line and the conductor. Two crimping components are provided. The two crimping components are arranged oppositely. The crimping component is fixedly arranged in the docking frame. The crimping component is detachably connected to the branch line. The crimping component is used to control the branch line to be tightly docked with the conductor.

[0010] The conducting component comprises a socket and a plug, wherein the socket is fixedly arranged in the docking frame, the socket is connected to the connecting line, the plug is fixedly arranged on the branch line, and the plug is detachably connected to the socket. The crimping component comprises a docking hole, a slide rail frame, a clamping frame, a sliding column and an adjusting component. The docking hole is arranged at a position aligned with the socket on the docking frame. Two slide rail frames are arranged, and two slide rail frames are fixedly arranged in the docking frame. An F-shaped F slide rail is arranged on the slide rail frame, and the clamping frame is slidably arranged between the two slide rail frames. A pushing pin is arranged on the end of the clamping frame close to the socket, and a clamping ring is arranged on the end of the clamping frame away from the pushing pin. Two sliding columns are fixedly arranged on both sides of the clamping frame, and the sliding column is slidably arranged in the F slide rail. The adjusting component is arranged on the docking frame, and the docking frame is used to adjust the sliding position of the clamping frame on the F slide rail.

[0011] The adjusting component includes a screw, a push piece and a push groove, the screw is rotatably arranged on the docking frame, the screw is arranged between the two slide rail frames, the screw is threadedly connected to the push piece, the push groove is opened on the clamping frame, the push piece is slidably arranged in the push groove, and a sealing ring is arranged on the branch line near the docking hole.

[0012] The working principle and beneficial effects of the present invention are: 1. In the present invention, by providing a positioning piece and an anti-twist rod, when the connecting wire and the conductor are clamped by the C-type clamp 1 and the C-type clamp 2, multiple clamping conductive components are connected by the positioning piece and the anti-twist rod, thereby preventing the conductors in the branch area from contacting each other, and preventing the positions where the insulation layers of multiple conductors are stripped from contacting each other, and the distance and relative angle between them are kept fixed by the support of the anti-twist rod; 2. In the present invention, a clamping frame and a sealing ring are provided, and the clamping frame clamps the branch line by rotating the screw rod, and at the same time drives the plug to extend into the socket, and at the same time the sealing ring squeezes into the docking hole, so that the branch line can be sealed and connected with the docking hole to prevent dust and water from entering; 3. In the present invention, by setting up a conductor support mechanism, multiple wires can be fixed and supported, so that multiple wires maintain a certain distance from the clamping point of the connecting wire and are staggered with each other, so that the volume of the branch is small and there will be no short circuit. By setting up a docking clamping mechanism, the wires can be detachably connected to the branch line and maintain sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the branch area in the present invention; Figure 3 It is a partial structural schematic diagram of the conductor support mechanism in the present invention; Figure 4 It is a schematic diagram of the local structure of the matching of the positioning piece and the torsion rod in the present invention; Figure 5 It is a partial cross-sectional structural schematic diagram of the cooperation between the docking frame and the branch line in the present invention; Figure 6 It is a schematic diagram of a partial cross-section structure of the cooperation between the docking frame and the branch line in the present invention from another viewing angle; Figure 7 It is a schematic cross-sectional structural diagram of the adjusting component in the present invention.

[0015] In the figure: 1. composite cable; 2. conductor; 3. branching area; 4. connecting line; 5. insulating sheath; 6. branch line; 7. C-type clamp 1; 8. insulating plate; 9. C-type clamp 2; 10. positioning piece; 11. anti-twist rod; 12. clamping piece; 13. branch frame; 14. docking frame; 15. socket; 16. plug; 17. docking hole; 18. F slide rail; 19. clamping frame; 20. sliding column; 21. screw; 22. push piece; 23. push groove; 24. sealing ring; 25. push pin; 26. clamping ring. DETAILED DESCRIPTION

[0016] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] like Figure 1 to Figure 7 As shown, this embodiment proposes a composite low-voltage branch cable, including a composite cable 1, in which a plurality of conductors 2 of different sizes are arranged, and also includes a branch area 3, a conductor support mechanism, a connecting wire 4, an insulating sheath 5 and a docking clamping mechanism, the branch area 3 is opened on the composite cable 1, and a plurality of conductors 2 are exposed in the branch area 3, the conductor support mechanism is fixedly arranged in the branch area 3, the conductor support mechanism is detachably connected to the plurality of conductors 2, the conductor support mechanism is used to support and fix the conductor 2, a plurality of connecting wires 4 are arranged, the connecting wires 4 correspond to the conductors 2 one by one, the connecting wires 4 are detachably connected to the conductors 2 through the conductor support mechanism, the insulating sheath 5 is sleeved on the branch area 3, the insulating sheath 5 is connected to the insulating layer on the composite cable 1, a plurality of docking clamping mechanisms are arranged, the plurality of docking clamping mechanisms correspond to the conductors 2 one by one, the docking clamping mechanism is arranged on the insulating sheath 5, the branch wire 6 is detachably connected to the docking clamping mechanism, and the docking clamping mechanism is used to detachably connect the branch wire 6 to the connecting wire 4, in this embodiment, there are specifically three conductors 2, and the diameters of the three conductors 2 are different.

[0018] like Figure 1~Figure 4 As shown, the conductor support mechanism includes a clamping conductive component and a conductor fixing component, a plurality of clamping conductive components are provided, and the plurality of clamping conductive components are staggered in the branch area 3, the clamping conductive component is detachably connected to the conductor 2, and the clamping conductive component is used to clamp and connect the conductor 2 and the connecting line 4, wherein the portion of the conductor 2 in contact with the clamping conductive component has an insulating layer removed, the conductor fixing component is provided in the branch area 3, the conductor fixing component is detachably connected to the plurality of conductors 2, and the conductor fixing component is used to fix the plurality of conductors 2, the clamping conductive component includes a C-type clamp 1 7, an insulating plate 8 and a C-type clamp 2 9, the C-type clamp 1 7 is provided between the plurality of conductors 2, and the C-type A clamp 7 is sleeved on one of the conductors 2, an insulating plate 8 is fixedly arranged on the C-type clamp 7, a C-type clamp 2 9 is sleeved on the connecting wire 4, the C-type clamp 2 9 is detachably connected to the C-type clamp 7, and the connecting wire 4 is clamped tightly together by the C-type clamp 7 and the C-type clamp 2 9. Since the conductor 2 needs to be conductive, the surface insulation layer is peeled off, and the portion of the conductor 2 with the insulation layer peeled off is separated from other conductors 2 by the insulating plate 8 to prevent the portions of the insulation layers peeled off on multiple conductors 2 from contacting each other. The staggered arrangement of multiple clamping conductive components makes the branch positions on the cable stay away from each other, avoiding the proximity of multiple branch lines 6, making the branch positions larger in volume and affecting the installation position.

[0019] like Figure 3~Figure 4As shown, the conductor fixing assembly includes a positioning piece 10, an anti-twist rod 11 and a clamping piece 12. A plurality of positioning pieces 10 are provided, and the positioning pieces 10 are detachably connected to a plurality of conductors 2. A plurality of positioning pieces 10 are spaced apart from the clamping conductive assembly. The anti-twist rod 11 passes through a plurality of positioning pieces 10. A plurality of clamping pieces 12 are provided, and the clamping piece 12 is detachably arranged on the anti-twist rod 11. Clamping pieces 12 are arranged on both sides of the positioning piece 10. Since the fillers between the insulating sheath of the cable and the conductors 2 are removed in the branch area 3, in order to prevent the three conductors 2 from twisting, the positioning piece 10 fixes the three conductors 2 to avoid mutual contact between the conductors 2. The anti-twist rod 11 is arranged in a T-shape, and the anti-twist rod 11 passes through four positioning pieces 10. The positioning piece 10 is clamped and fixed on the torsion rod by the clamping piece 12. Bolts are arranged on the clamping piece 12, and the torsion rod is squeezed and fixed by rotating the bolts.

[0020] like Figure 5~Figure 7 As shown, the docking clamping mechanism includes a branch frame 13, a docking frame 14, a conduction component and a crimping component. The branch frame 13 is fixedly arranged on the insulating sheath 5. The branch frame 13 corresponds to the clamping conduction component one by one. The branch frame 13 is sleeved on the clamping conduction component. The docking frame 14 is fixedly arranged on the docking frame 14. The branch line 6 is detachably connected to the docking frame 14. The conduction component is fixedly arranged in the docking frame 14. The conduction component is connected to the connecting line 4. The conduction component conducts electricity between the branch line 6 and the conductor 2. Two crimping components are provided. The two crimping components are arranged opposite to each other. The crimping components are fixed. It is fixedly arranged in the docking frame 14, and the crimping assembly is detachably connected to the branch line 6. The crimping assembly is used to control the branch line 6 to be tightly docked with the conductor 2. Three branch frames 13 are arranged, and the three branch frames 13 are staggered on the insulating sheath 5. The branch frame 13 is surrounded by the insulating sheath 5 to avoid the large volume of the branch caused by too many conductors 2. The branch frame 13 is used to protect the clamping conduction assembly. When connecting the branch line 6, the branch line 6 is extended into the docking frame 14, and the branch line 6 is connected to the conduction assembly through the crimping assembly, so that the branch line 6 is docked with the connecting line 4.

[0021] like Figure 5~Figure 7As shown, the conduction component includes a socket 15 and a plug 16, the socket 15 is fixedly arranged in the docking frame 14, the socket 15 is connected to the connecting line 4, the plug 16 is fixedly arranged on the branch line 6, and the plug 16 is detachably connected to the socket 15, the crimping component includes a docking hole 17, a slide rail frame, a clamping frame 19, a sliding column 20 and an adjusting component, the docking hole 17 is arranged on the docking frame 14 at a position aligned with the socket 15, there are two slide rail frames, the two slide rail frames are fixedly arranged in the docking frame 14, an F-shaped F slide rail 18 is arranged on the slide rail frame, the clamping frame 19 is slidably arranged between the two slide rail frames, a push pin 25 is arranged on the end of the clamping frame 19 close to the socket 15, a clamping ring 26 is arranged on the end of the clamping frame 19 away from the push pin 25, two sliding columns 20 are fixedly arranged on both sides of the clamping frame 19, the sliding column 20 is slidably arranged in the F slide rail 18, the adjusting component is arranged on the docking frame 14, the docking frame 14 It is used to adjust the sliding position of the clamping frame 19 on the F slide rail 18. There are grooves on both sides of the plug 16, and the grooves correspond to the pushing pins 25. After the plug 16 is docked with the socket 15 through the docking hole 17, the plug 16 is fixed and driven by the clamping frame 19. When the clamping frame 19 slides on the F slide rail 18 through the sliding column 20, the clamping frame 19 first moves obliquely until the sliding column 20 slides to the straight section on the F slide rail 18. At this time, the pushing pin 25 extends into the groove, and the clamping ring 26 contacts the branch line 6. At this time, the sliding of the clamping frame 19 pushes the socket 15 into the plug 16 through the groove, and drives the sealing ring 24 to move toward the docking hole 17, so that the sealing ring 24 is squeezed into the docking hole 17 to achieve sealing. For unused branches, a plug similar to the branch line 6 and the socket 15 can be extended into the docking frame 14, and docked through the clamping frame 19, and then sealed.

[0022] like Figure 6~Figure 7 As shown, the adjusting component includes a screw 21, a push piece 22 and a push groove 23. The screw 21 is rotatably set on the docking frame 14, the screw 21 is set between the two slide rail frames, the screw 21 is threadedly connected with the push piece 22, the push groove 23 is opened on the clamping frame 19, the push piece 22 is slidably set in the push groove 23, and a sealing ring 24 is set on the branch line 6 near the docking hole 17. Both ends of the push piece 22 extend out of the push groove 23, one end of the screw 21 passes through the docking frame 14, and the screw 21 can be twisted by a screwdriver. When the screw 21 rotates, the push piece 22 will push the clamping frame 19 to move after the screw 21 deflects a certain angle in the push groove 23, and because the push piece 22 is in the push groove 23, the clamping frame 19 will not deflect, and the clamping frame 19 will always maintain a parallel state and move in the F slide rail 18.

[0023] In this embodiment, in the branch area 3 on the composite cable 1, the insulation layers of different conductors 2 are stripped at different positions, the connecting wire 4 and the conductor 2 are clamped by C-type clamp 1 and C-type clamp 2, and the anti-twist rod 11 passes through the positioning plate 10 to prevent the conductor 2 from twisting. For the branch cable that needs to be used, one end of the plug 16 on the branch line 6 is inserted into the docking hole 17. When the plug 16 is docked with the socket 15, the screw 21 is turned with a screwdriver, and the screw 21 drives the pushing piece 22 to move. The pushing piece 22 pushes the clamping frame 19 to move through the pushing groove 23, and the pushing pin 25 is extended into the groove. The clamping ring 26 contacts the branch line 6, and the clamping frame 19 drives the branch line 6 to move.

[0024] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite low-voltage branch cable, comprising a composite cable (1), wherein the composite cable (1) is provided with a plurality of conductors (2) of different sizes, characterized in that: Also includes: A branching area (3), the branching area (3) being opened on the composite cable (1), and a plurality of the conductors (2) being exposed in the branching area (3); A conductor support mechanism, the conductor support mechanism is fixedly arranged in the branch area (3), the conductor support mechanism is detachably connected to the plurality of conductors, and the conductor support mechanism is used to support and fix the conductors (2); Connecting wires (4), a plurality of connecting wires (4) are provided, the connecting wires (4) correspond to the conducting wires (2) one by one, and the connecting wires (4) and the conducting wires (2) are detachably connected via the conductor support mechanism; An insulating sheath (5), the insulating sheath (5) being sleeved on the branch area (3), the insulating sheath (5) being connected to the insulating layer on the composite cable (1); A butt clamping mechanism, wherein a plurality of the butt clamping mechanisms are provided, and the plurality of the butt clamping mechanisms correspond one to one with the wires (2); the butt clamping mechanism is provided on the insulating sheath (5); a branch line (6) is detachably connected to the butt clamping mechanism; and the butt clamping mechanism is used to detachably connect the branch line (6) to the connecting line (4).

2. A composite low-voltage branch cable according to claim 1, characterized in that: The conductor supporting mechanism comprises: A clamping conductive component, wherein a plurality of the clamping conductive components are provided, the plurality of the clamping conductive components are arranged alternately in the branch area (3), the clamping conductive component is detachably connected to the conductor (2), and the clamping conductive component is used to clamp and connect the conductor (2) and the connecting line (4); Wherein, the insulating layer is removed from the portion of the wire (2) that contacts the clamping conductive component; A conductor fixing assembly, the conductor fixing assembly being arranged in the branch area (3), the conductor fixing assembly being detachably connected to the plurality of conductors (2), and the conductor fixing assembly being used to fix the plurality of conductors (2).

3. A composite low-voltage branch cable according to claim 2, characterized in that: The clamping transmission assembly comprises: A C-shaped clamp (7), wherein the C-shaped clamp (7) is arranged between a plurality of the wires (2), and the C-shaped clamp (7) is sleeved on one of the wires (2); An insulating plate (8), the insulating plate (8) being fixedly arranged on the C-shaped clamp 1 (7); C-type clamp 2 (9), the C-type clamp 2 (9) is sleeved on the connecting line (4), and the C-type clamp 2 (9) is detachably connected to the C-type clamp 1 (7).

4. A composite low-voltage branch cable according to claim 3, characterized in that: The conductor fixing assembly comprises: A positioning piece (10), wherein a plurality of the positioning pieces (10) are provided, the positioning piece (10) is detachably connected to the plurality of the conducting wires (2), and the plurality of the positioning pieces (10) are spaced apart from the clamping conductive component; An anti-twist rod (11), the anti-twist rod (11) passing through the plurality of positioning pieces (10); A clamping piece (12), wherein a plurality of the clamping pieces (12) are provided, and the clamping piece (12) is detachably provided on the anti-twist rod (11), and the clamping pieces (12) are provided on both sides of the positioning piece (10).

5. A composite low-voltage branch cable according to claim 4, characterized in that: The docking clamping mechanism comprises: A branch frame (13), the branch frame (13) being fixedly arranged on the insulating sheath (5), the branch frame (13) corresponding one-to-one to the clamping conductive component, and the branch frame (13) being sleeved on the clamping conductive component; A docking frame (14), the docking frame (14) being fixedly arranged on the docking frame (14), and the branch line (6) being detachably connected to the docking frame (14); A conduction component, the conduction component being fixedly arranged in the docking frame (14), the conduction component being connected to the connecting line (4), and the conduction component conducting electricity between the branch line (6) and the conductor (2); A crimping assembly, wherein two crimping assemblies are provided, the two crimping assemblies are arranged opposite to each other, the crimping assemblies are fixedly arranged in the docking frame (14), the crimping assembly and the branch line (6) are detachably connected, and the crimping assembly is used to control the branch line (6) to be tightly docked with the conductor (2).

6. A composite low-voltage branch cable according to claim 5, characterized in that: The conductive component comprises: a socket (15), the socket (15) being fixedly arranged in the docking frame (14), the socket (15) being connected to the connecting line (4); A plug (16), wherein the plug (16) is fixedly arranged on the branch line (6), and the plug (16) is detachably connected to the socket (15).

7. A composite low-voltage branch cable according to claim 6, characterized in that: The crimping assembly comprises: A docking hole (17), the docking hole (17) being provided at a position on the docking frame (14) aligned with the socket (15); Slide rail frames, two of which are provided, the two slide rail frames being fixedly arranged in the docking frame (14), and the slide rail frames being provided with F-shaped F slide rails (18); A clamping frame (19), the clamping frame (19) being slidably disposed between the two slide rail frames, a push pin (25) being disposed at one end of the clamping frame (19) close to the socket (15), and a clamping ring (26) being disposed at one end of the clamping frame (19) away from the push pin (25); Sliding columns (20), two of which are fixedly disposed on each side of the pressing frame (19), and the sliding columns (20) are slidably disposed in the F slide rail (18); An adjusting component, wherein the adjusting component is arranged on the docking frame (14), and the docking frame (14) is used to adjust the sliding position of the pressing frame (19) on the F slide rail (18).

8. A composite low-voltage branch cable according to claim 7, characterized in that: The adjusting component comprises: a screw rod (21), the screw rod (21) being rotatably disposed on the docking frame (14), the screw rod (21) being disposed between the two slide rail frames; A push piece (22), the screw rod (21) being threadedly connected to the push piece (22); A pushing groove (23), wherein the pushing groove (23) is provided on the pressing frame (19), and the pushing sheet (22) is slidably disposed in the pushing groove (23).

9. A composite low-voltage branch cable according to claim 8, characterized in that: A sealing ring (24) is provided on the branch line (6) at a position close to the docking hole (17).

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