CN2540015Y

CN2540015Y - Prefabricated multi-core coaxial branch cable

Info

Publication number: CN2540015Y
Application number: CN 02208966
Authority: CN
Inventors: 胡志乐; 郑武; 阚武
Original assignee: JIUCHUAN ELECTRIC APPLICANCE CO Ltd
Current assignee: JIUCHUAN ELECTRIC APPLICANCE CO Ltd
Priority date: 2002-04-15
Filing date: 2002-04-15
Publication date: 2003-03-12
Anticipated expiration: 2012-04-15

Abstract

A prefabricated multi-core coaxial branch cable comprises a main multi-core coaxial cable 2, multi-core coaxial branch cable 4, branch joint connecting piece 23, all phase branch connecting bodies 7, 8, 9, 10 and 11 after injection encapsulation molding, overall injection molded outer insulation jacket 6, and other components. The entire production process is completed in a professional production line with particular equipment and mold.

Description

Precast multicored coaxial branch cable

The utility model relates to the power cable field.

Power cable branch in the known technology, the processing of joint, generally all be in the cable laying job site, on concrete branch or joint location, cut and peel off one section cable outer layer sheath, primary insulation, then with U type connector by instruments such as hydraulic tongs with two strip off sheaths, the insulation after two cable conductors be crimped on together, insulate with epoxy resin or other insulating material more at last and seal processing.Its defective is:

1, dielectric strength is difficult to guarantee, reliability, consistency are poor;

2, the job site occupied ground is big; The specification requirement height; Cycle time is long; Expense is big.

The purpose of this utility model is: solve power cable and handle cable branch, the existing defective of joint and deficiency at the construction field (site), improve electric property, the operational reliability of each branch joint of cable; Overcome and solve a series of difficulties and defective in the cable laying work progress.

Though the utility model patent (patent No.: CN2411542Y) and patent of invention bulletin (patent publication No.: CN1308343A) of prefabricated multi-core branch cable is also arranged, but what proposed in fact all is single core multiple-limb, promptly be the same position on single-core cable, produce many branches simultaneously.Its defective is:

Therefore 1, fail on A, B, C, N, PE multicore coaxial cable, to carry out multicore same-phase branch, will reach the purpose of phase three-wire three, three-phase and four-line, Three-phase five-wire power supply, must three, four, five separately independently cable make up just and can finish.

2, limited to when cable shaft, cable passage or construction occasion, just can't be realized in the time of must using multicore coaxial cable to meet the demands.

Realize that method of the present utility model is: by determining concrete branch, joint location on the cable construction design drawing, power cable specification, model, cross section with the defined on the drawing, on the professional production streamline, with special production mould therefor and equipment, with the branch of power cable, joint by the regulation crimping injection moulding of phase place separately, seal moulding.

Advantage of the present utility model is:

1, pays all branches and the joint that the on-the-spot whole piece power cable that uses of unit in charge of construction will need, prefabricated finishing in specialized factory;

2, site operation equipment is reduced; Specification requirement reduces; Expense declines to a great extent; Time shortens in a large number.

Good effect of the present utility model is:

1, the power cable that puts into operation all is being greatly enhanced aspect electrical characteristic, dielectric strength, watertightness, air-tightness, reliability, the consistency;

2, make power cable under normal circumstances the operation troubles rate descend significantly, make power cable reach non-maintaining highly reliable running status.

Now, the utility model is done detailed explanation with the embodiment of accompanying drawing.

Fig. 1 is a precast multicored coaxial branch cable general shape schematic diagram;

Fig. 2 is a precast multicored coaxial branch cable internal structure schematic diagram;

Fig. 3 is that inner each the phase individual branches internal structure A-A of precast multicored coaxial branch cable is to enlarged diagram;

Fig. 4 is that precast multicored coaxial branch cable B1-B1 is to generalized section;

Fig. 5 is that precast multicored coaxial branch cable B2-B2 is to generalized section;

Fig. 6 is that precast multicored coaxial branch cable B3-B3 is to the amplification profile schematic diagram.

Among the figure: 1 is the overall external form of precast multicored coaxial branch cable; 2 is the main body-multi-core coaxial leader cable of precast multicored coaxial branch cable; 3 is leader cable outer layer insulation sheath; 4 is branch's multicore coaxial cable; 5 is the outer layer insulation sheath of branch cable; 6 is the overall outer layer insulation sheath of multi-core coaxial branch union body; 7,8,9,10,11 is each A of connected body of multi-core coaxial branch, B, C, N, PE line; 17,18,19,20,21 multi-core coaxial branch cable inside each have A, B, C, N, the PE line of independent insulating barrier; 22 is the leader cable conductor core wire; 23 is the branch joint connector; 24 is the branch cable conductor core wire.

Now elaborate with accompanying drawing 2:

By specification, model, the cross section of the designed multicore coaxial cable of architectural design department, and on design drawing the position of defined, on leader cable 2, cut the outer layer insulation sheath 3 of stripping respective length.Independently cut the primary insulation separately 12,13,14,15,16 of shelling respective length on the relevant position of insulated conductor separately at multicore coaxial cable again.Cut the leader cable primary insulation at 12,13,14,15,16 o'clock, and it is also noted that the creepage distance that keeps between each phase conductor, promptly the mutual dislocation after the primary insulation injection process is apart from S.

Pressing branch cable specification, model, the cross section of defined on the design drawing again, cut the outer layer insulation sheath 5 of stripping suitable length at its position, termination, (is three during three cores: A, B, C three-phase with many then; Four-core is to be four: A, B, C, N phase; Five cores are to be five: A, B, C, N, PE phase) according to the phase place colour code identical with leader cable, make in order peel off primary insulation after, the relevant position length of exposing the leader cable conductor core wire, cut redundance, peel off the multi-core branch cable

primary insulation

17,18,19,20,21 of respective length again.

Again with the conductor core wire 24 of each branch cable,, snap into separately on the leader cable heart yearn 22 according to phase place colour code separately.Be 02207758.8U type branch joint connector 23 with the number of patent application for preparing shaping again, on particular manufacturing craft, special equipment, professional production line,, and it is reached and keep designing institute required pressure and intensity U type connector 23 and leader cable conductor core wire 22 and the 24 crimping moulding of branch cable conductor core wire.

After above-mentioned every work is finished, through after the assay was approved, can enter next bar special production line, with the primary insulation injection moulding of each phase branch connected body of precast multicored coaxial cable, seal shaping, be encapsulated in each mutually independently on the branch joint with special equipment and particular manufacturing craft with 7,8,9,10,11.Through after the assay was approved, can change next bar professional production line over to, with special equipment and particular manufacturing craft overall outer layer insulation sheath 6 injection mouldings of multi-core coaxial branch connected body are sealed, check, dispatched from the factory.So far, precast multicored coaxial branch cable on the professional production line, is finished with production equipment special and particular manufacturing craft production.

Implementing best mode of the present utility model is at the professional production line, produces with special equipment and particular manufacturing craft.

Claims

1, a kind of precast multicored coaxial branch cable, form by parts such as leader cable 2, branch cable 4, connectors 23, it is characterized in that: divide connected body the 7,8,9,10, the 11st, seal moulding in the independent separately injection moulding after connector 23 compression mouldings of leader cable 22, branch cable 24.

2, a kind of precast multicored coaxial branch cable according to claim 1 is characterized in that: branch's connected body 7,8,9,10,11 that each phase place is independently sealed after the moulding separately keeps enough dislocation apart from S each other.

3, a kind of precast multicored coaxial branch cable according to claim 1 is characterized in that: overall outer layer insulation sheath 6 is after independently branch's connected body 7,8,9,10,11 is sealed injection mo(u)lding separately, totally seals injection mo(u)lding again.