CN216161513U

CN216161513U - Mineral insulation branch cable

Info

Publication number: CN216161513U
Application number: CN202122140388.3U
Authority: CN
Inventors: 夏世全
Original assignee: CHONGQING KEBAO CABLE CO LTD
Current assignee: CHONGQING KEBAO CABLE CO LTD
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-04-01
Anticipated expiration: 2031-09-06

Abstract

The utility model discloses a mineral insulated branch cable, which relates to a cable scheme comprising a main cable and a branch cable; the main cable and the branch cables comprise copper cores, mineral insulating layers, a binding metal sheath layer and a plastic outer sheath from inside to outside; the end part of the branched copper core is connected with the copper core of the main body, and a wrapping insulating layer, a metal protective layer and a plastic protective layer are sequentially arranged at the joint from inside to outside. The cable has the advantages of safe and reliable power supply, good insulating property, low power distribution cost, low maintenance requirement after installation and installation, solves the connection problem of the main body and the molecules of the mineral insulated cable, and solves the problems of high cost and unstable performance of the puncture cable clamp and the molecule box.

Description

Mineral insulation branch cable

Technical Field

The utility model relates to a mineral insulated branch cable, and mainly relates to the field of cables.

Background

Along with the development of society and economy, high-rise and super high-rise buildings and tunnels are largely built, mineral insulated cables are increasingly adopted to ensure the fireproof performance of the cables, and the excellent flame-retardant and fireproof performance of the cables can ensure that the cables can continuously run in a fire disaster and ensure that fire-fighting equipment and emergency lighting can continuously supply power in a disaster.

Due to the complexity of a building power distribution system, various joints must be produced on electric wires, a traditional cable is usually connected with a main wire and a molecular cable in a puncturing wire clamp mode, but the puncturing wire clamp is used for testing the technical level of workers, faults are easy to occur, manpower and material resources are wasted, the connection of mineral cables cannot be realized only by adopting a split-phase cable box through the puncturing wire clamp, and the cost of a branch box is high, so that the mineral insulation branch cable is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the mineral insulation branch cable which has the advantages of safe and reliable power supply, good insulation performance, low power distribution cost, low installation environment and maintenance requirement after installation and the like, solves the connection problem of the trunk and the molecules of the mineral insulation cable, and avoids the problems of high cost and unstable performance of a puncture wire clamp and a molecule box.

In order to achieve the purpose, the technical scheme of the utility model is as follows: the cable comprises a trunk cable and a branch cable;

the main cable and the branch cables comprise copper cores, mineral insulating layers, a binding metal sheath layer and a plastic outer sheath from inside to outside;

the end part of the branched copper core is connected with the copper core of the main body, and a wrapping insulating layer, a metal protective layer and a plastic protective layer are sequentially arranged at the joint from inside to outside.

Through utilizing around package insulating layer, metal protection layer and plastic protection layer trunk and branch, the form of crossing of the package of the original wire rod of simulation that can fine volume simulates the protection of the original wire rod through several simple modes, and is more firm with the connection of trunk and molecule, can effectually avoid appearing the condition of breaking in the junction, safe and reliable more.

Preferably, the mineral insulating layer is wrapped around the outside of the copper core.

Preferably, the plastic outer sheath is extruded on the metal sheath layer.

Preferably, the ends of the branched copper cores are connected in parallel to the copper core of the trunk.

Preferably, the end of the branched copper core is fixed to the copper core of the trunk by C-shaped copper clamp crimping.

Preferably, both ends of the plastic protective layer are covered to the outside of the plastic outer sheath.

Preferably, the copper core is a stranded compacted conductor.

Preferably, the mineral insulating layer is a synthetic mica tape wrapping.

Preferably, the metal sheath layer is welded by copper strips.

Preferably, the lapping insulating layer is made of synthetic mica tape and polyethylene tape which is heated and melted.

The technical principle and the beneficial effects of the utility model are as follows:

according to the mineral insulation branch cable, as the cable joint is prefabricated in a factory, the joint does not need to be manufactured again in the installation and use process, and the installation and construction cost is saved by one-time construction; the problems of unstable construction quality of the puncture wire clamp and the like are avoided; meanwhile, the joint keeps the flame-retardant and fire-resistant characteristics of the mineral insulated cable, and the joint is insulated by adopting a mineral insulated synthetic mica tape, so that the joint has excellent fire-resistant performance. Adopting a metal protective layer to protect the joint from leakage current; the outmost layer adopts the joint of moulding plastics to further protect the joint of cable, promotes the cable joint ability of anti mechanical properties, keeps the safe and reliable of joint, compares ordinary cable joint and has practiced thrift the maintenance cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly introduced below, it is obvious that the drawings in the following description are only two of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Wherein, oversheath 1, line metal sheath layer 2, mineral insulating layer 3, copper core 4, C type copper nip 5, wrap insulating layer 6, metal protection layer 7, plastic protection layer 8 around.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely preferred embodiments of the present invention, rather than all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1, an embodiment of the present invention includes a trunk cable and a branch cable.

The main cable and the branch cable comprise a copper core 4, a mineral insulating layer 3, a binding metal sheath layer 2 and a plastic outer sheath 1 from inside to outside.

The end part of the branched copper core 4 is connected with the copper core 4 of the main body, and a wrapping insulating layer 6, a metal protective layer 7 and a plastic protective layer 8 are sequentially arranged at the connection part from inside to outside.

Through utilizing around package insulating layer 6, metal protection layer 7 and plastic protection layer 8 to trunk and branch, the form of having wrapped of the original wire rod of simulation that can be fine amount is simulated through the protection of several simple modes with the original wire rod, and is more firm with the connection of trunk and molecule, can effectually avoid appearing the condition of open circuit in the junction, safe and reliable more.

The mineral insulating layer 3 is wrapped outside the copper core 4.

The plastic outer sheath 1 is extruded on the metal sheath layer, and the plastic outer sheath 1 is made of low-smoke halogen-free polyolefin material and has the thickness not less than 1.8 mm.

The ends of the branched copper cores 4 are connected in parallel to the copper core 4 of the trunk. The metal protective layer 7. And the trunk and the branch embossing metal sheath are connected by lapping and covering a copper strip.

The end part of the branched copper core 4 is connected and fixed with the copper core 4 of the main body through a C-shaped copper clamping and pressing 5.

Both ends of the plastic protective layer 8 cover the outside of the plastic outer sheath 1.

The copper core 4 is a stranded compacted conductor.

The mineral insulating layer 3 is a synthetic mica tape wrapping with the thickness not less than 1.3mm

The metal sheath layer is welded by a copper strip, and the thickness of the metal sheath layer is not less than 0.5mm

The lapping insulating layer 6 is formed by heating and melting a polyethylene tape by a synthetic mica tape. The thickness of the cable is not less than 1.5mm, and the lapping insulating layer 6 must completely cover the connector, lap joint trunk and branch cable insulating layer. The branch head plastic protection layer 8 is formed by injection molding of a low-smoke halogen-free polyolefin material with performance superior to that of the cable outer sheath 1.

According to the mineral insulation branch cable, as the cable joint is prefabricated in a factory, the joint does not need to be manufactured again in the installation and use process, and the installation and construction cost is saved by one-time construction; the problems of unstable construction quality of the puncture wire clamp and the like are avoided; meanwhile, the joint keeps the flame-retardant and fire-resistant characteristics of the mineral insulated cable, and the joint is insulated by adopting a mineral insulated synthetic mica tape, so that the joint has excellent fire-resistant performance. A metal protective layer 7 is adopted to protect the joint from leakage current; the outmost layer adopts the joint of moulding plastics to further protect the joint of cable, promotes the cable joint ability of anti mechanical properties, keeps the safe and reliable of joint, compares ordinary cable joint and has practiced thrift the maintenance cost.

The cable has the advantages of safe and reliable power supply, good insulating property, low power distribution cost, low maintenance requirement after installation and installation, solves the connection problem of the main body and the molecules of the mineral insulated cable, and solves the problems of high cost and unstable performance of the puncture cable clamp and the molecule box.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A mineral insulated branch cable is characterized by comprising a main cable and a branch cable;

the main cable and the branch cables comprise a copper core (4), a mineral insulating layer (3), a binding metal sheath layer (2) and a plastic outer sheath (1) from inside to outside;

the end part of the branched copper core (4) is connected with the copper core (4) of the main body, and a wrapping insulating layer (6), a metal protective layer (7) and a plastic protective layer (8) are sequentially arranged at the connection part from inside to outside.

2. A mineral-insulated branch cable according to claim 1, characterized in that: the mineral insulating layer (3) is wrapped outside the copper core (4).

3. A mineral-insulated branch cable according to claim 1, characterized in that: the plastic outer sheath (1) is extruded on the metal sheath layer.

4. A mineral-insulated branch cable according to claim 1, characterized in that: the end parts of the branched copper cores (4) are connected in parallel to the copper cores (4) of the trunk.

5. A mineral-insulated branch cable according to claim 1, characterized in that: the end part of the branched copper core (4) is connected and fixed with the copper core (4) of the trunk through a C-shaped copper clamping and pressing part (5).

6. A mineral-insulated branch cable according to claim 1, characterized in that: and two ends of the plastic protective layer (8) are covered to the outside of the plastic outer sheath (1).

7. A mineral-insulated branch cable according to claim 1, characterized in that: the copper core (4) is a stranded compacted conductor.

8. A mineral-insulated branch cable according to claim 1, characterized in that: the mineral insulating layer (3) is a synthetic mica tape lapping package.

9. A mineral-insulated branch cable according to claim 1, characterized in that: the metal sheath layer is welded by a copper strip.

10. A mineral-insulated branch cable according to claim 1, characterized in that: the lapping insulating layer (6) is formed by heating and melting a polyethylene tape by a synthetic mica tape.