CN-224232384-U - Underground pipe gallery high-power multicore pre-branched cable double-branch structure

Abstract

The utility model provides a high-power multicore of underground pipe gallery is branch cable double branch structure in advance, characterized by includes main cable, two branch cables, the water blocking tape, C shape crimping knot and injection molding casing, structural design is simple, on ordinary power cable basis, richen cable series product variety, it further promotes the waterproof performance of branch body in advance to design multilayer water blocking tape water blocking technology in connection port department, make the cable have environmental protection dampproofing and waterproofing performance good, increase circuit safe reliability, reduce the construction of main line switch board, greatly reduce circuit loss and installation cost, can be applied to newly-built or upgrade and change the urban underground pipe gallery project in a large number, satisfy urban power supply demand, economic value and using value are very considerable, improve the security and the reliability of urban wisdom electric wire netting overall operation.

Inventors

• KUANG SONGWEN
• ZHANG LIJUN
• XIAO YU
• LU CHAOYAN

Assignees

• 恒飞电缆股份有限公司

Dates

Publication Date

20260512

Application Date

20250604

Claims (3)

1. 1. The utility model provides a high-power multicore of underground pipe gallery is branch cable double branch structure in advance, its characterized in that includes trunk cable, two branch line cables, water blocking tape, C shape crimping knot and injection molding casing; the main cable is an insulated copper wire with the cross section area of 240mm 2 -400mm 2 and comprises a front end and a rear end; The two branch cables are insulated copper wires with the cross section area of 50mm 2 -95mm 2 , and comprise a connecting end and a wire outlet end; The outgoing ends of the two branch cables are oppositely arranged at two sides of the rear end of the main cable, the bare copper conductor end of the corresponding phase of the connection end of the branch cable is mechanically crimped with the bare copper conductor of the stripping insulating layer of the corresponding phase between the front end and the rear end of the main cable through the dislocation of the C-shaped crimping buckle; the water blocking strips are respectively arranged on the outer walls of the front end and the rear end of the main cable and the outer walls of the outgoing ends of the branch cables; the main cable and the branch cable connected with the main cable form a cable pre-branching body; The injection molding shell is made of an insulating high polymer material, the injection molding shell is coated on the cable pre-branching body, and the front end and the rear end of the main cable provided with the water blocking belt and the wire outlet end of the branch cable are completely coated in the injection molding shell.
2. 2. The underground pipe gallery high-power multicore pre-branching cable double-branching structure of claim 1, wherein the thickness of the injection molding shell on any surface of the cable pre-branching body is more than or equal to 4.5mm.
3. 3. The underground pipe gallery high-power multi-core pre-branching cable double-branching structure according to claim 1 or 2, wherein the single-layer thickness of the water-blocking tape is 0.25mm, and 6-8 layers are overlapped and wrapped.

Description

Underground pipe gallery high-power multicore pre-branched cable double-branch structure Technical Field The utility model relates to the technical field of pre-branching cables, in particular to a high-power multi-core pre-branching cable double-branching structure of an underground pipe gallery. Background At present, the power cable in the underground pipe gallery project is generally large in capacity or large in power load distribution as a main network of a city, power energy is provided for production, living and travel of urban residents, and the cable is required to be converted up and down for many times according to distribution tasks in branch lines, so that more distribution switch cabinets and conversion boxes are required to be built nearby the lines, and the line construction cost and line loss are greatly increased. In order to reduce the construction cost of a power distribution cabinet and a conversion box, a common branching means is to directly connect a main cable with a branch cable through a puncture wire clamp on a main line, but due to poor sealing and waterproof performance of the puncture wire clamp, and due to the fact that moisture and water accumulation phenomenon often occur in an underground pipe gallery due to seasonal characteristics, water is easily fed into or wets at a joint, a cable is subjected to a short-circuit accident, the safe operation of the line is threatened, and when the line vibrates, the puncture wire clamp is in rigid contact with the main cable, and the voltage is unstable due to loosening easily when vibration occurs. Disclosure of Invention The utility model provides a high-power multi-core pre-branching cable double-branching structure for an underground pipe gallery, which aims at the problems in the background art, is used for reducing the construction cost of an outdoor power distribution cabinet or a transfer box in an underground pipe gallery cable line, reduces line loss, has good moisture resistance, stabilizes line voltage and improves the overall safety and reliability of the underground pipe gallery power grid branch line. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The utility model provides a high-power multicore of underground pipe gallery is branch cable double branch structure in advance, its characterized in that includes trunk cable, two branch line cables, water blocking tape, C shape crimping knot and injection molding casing; the main cable is an insulated copper wire with the cross section area of 240mm 2-400mm2 and comprises a front end and a rear end; The two branch cables are insulated copper wires with the cross section area of 50mm 2-95mm2, and comprise a connecting end and a wire outlet end; The outgoing ends of the two branch cables are oppositely arranged at two sides of the rear end of the main cable, the bare copper conductor end of the corresponding phase of the connection end of the branch cable is mechanically crimped with the bare copper conductor of the stripping insulating layer of the corresponding phase between the front end and the rear end of the main cable through the dislocation of the C-shaped crimping buckle; the water blocking strips are respectively arranged on the outer walls of the front end and the rear end of the main cable and the outer walls of the outgoing ends of the branch cables; the main cable and the branch cable connected with the main cable form a cable pre-branching body; The injection molding shell is made of an insulating high polymer material, the injection molding shell is coated on the cable pre-branching body, and the front end and the rear end of the main cable provided with the water blocking belt and the wire outlet end of the branch cable are completely coated in the injection molding shell. The further scheme of the utility model is that the thickness of the injection molding shell on any surface of the cable pre-branching body is more than or equal to 4.5mm in order to ensure the insulation and moisture-proof effects. The utility model further adopts the scheme that the single-layer thickness of the water-blocking tape is 0.25mm, and 6-8 layers of the winding are overlapped to ensure the dampproof effect. The novel intelligent power grid has the beneficial effects that the novel intelligent power grid is simple in structural design, the multi-layer water blocking strip water blocking process is designed at the connecting port, the waterproof performance of the pre-branching body is further improved, the cable is environment-friendly, dampproof and excellent in water blocking performance, the thickness distribution of the injection molding shell can be avoided when the wire outlet end is in an opposite structure, the safety and reliability of a cable line are improved, the construction of a main line power distribution cabinet is reduced, the line loss and the installation cost are greatly reduced, the novel intelligent