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Prefabricated branch cable manufacturing method

A manufacturing method and technology of prefabricated branches, applied in cable/conductor manufacturing, insulated cables, cables, etc., can solve problems such as violation of technical specifications and cannot be used casually, and achieve the effects of improving sealing effect, firm wire clamping, and simple processing structure

Inactive Publication Date: 2010-08-25
上海胜武电缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of chain power distribution is clearly stipulated in the low-voltage electrical design specifications, and it is conditional and cannot be used casually. The branch box method mentioned above violates the technical specifications

Method used

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  • Prefabricated branch cable manufacturing method
  • Prefabricated branch cable manufacturing method
  • Prefabricated branch cable manufacturing method

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Embodiment Construction

[0034] The embodiment is shown in FIGS. 4-5 . In this prefabricated branch cable, both the trunk line 1 and the branch line 2 are composed of a conductor 4 , an insulating layer 5 and a metal sheath 6 . The conductor 4 can be formed by twisting one or more metal wire cores. The insulating layer 5 is formed by winding a mineral insulating tape, and the mineral insulating tape can be a single inorganic material insulating tape or a mixed inorganic material insulating tape made of glass fiber, mica tape, asbestos silk, or metal oxide. The surface of the metal sheath 6 can be smooth or corrugated.

[0035] The wires of the main line 1 and the branch line 2 are connected in a Y shape, and the mineral insulating tape is wrapped around the nodes, and they are crimped together by the connector 3. The outermost layer is closed by a metal cover 7 and a metal cover 8, and the metal cover Both the shell 7 and the metal cover 8 have corresponding connection holes 15 and are fixedly connec...

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Abstract

The invention provides a prefab branch cable and a production method thereof. Both a backbone cable and a branch cable consist of a conductor, an insulating layer and a metal sheath, wherein, the insulating layer is wound by a mineral insulated tape, wires of both the backbone cable and the branch cable are connected in a Y shape, the mineral insulated tape is wound outside nodes and compression jointed together by a connecting piece, the outermost layer is sealed by a metal encloser and a metal cap which are fitted, both the metal enclosure and the metal cap are provided with corresponding connecting holes and are fixedly connected by a fastening piece. The high-temperature resistance, the humidity resistance and the fire resistance or the sealing effect of the prefab branch cable are further improved. The invention has the characteristics of simple end processing structure, safety and reliability, convenient assembly and disassembly, firm cable clamp, good leak tightness, high-temperature resistance, corrosion resistance, fire resistance and explosion prevention; moreover, the invention does not reduce the insulating resistance due to moisture. In the power transmission, the invention can bear greater current capacitance; in case of fire, any smoke or toxic or harmful gases is not generated and the combustion is not caused. Therefore, the invention can be applicable to various industries and civil buildings.

Description

(1) Technical field [0001] The invention relates to a cable and a manufacturing method thereof, in particular to a prefabricated branch cable and a manufacturing method thereof. (2) Background technology [0002] The magnesia mineral insulated fireproof cables on the existing market have a history of more than 100 years in foreign countries and more than 30 years in China. Since this kind of cable uses magnesia powder as the insulating layer, the insulating powder is easy to absorb moisture. When the insulation resistance is reduced due to moisture, the metal cover cannot be peeled off at the connection, and the terminal must be treated with complicated and strict procedures, otherwise it cannot be used safely. Therefore, magnesium oxide mineral insulated fireproof cables have not been able to make pre-branch cables, also known as prefabricated branch cables. In low-voltage power distribution systems, only radial power distribution with large copper consumption and very larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/00H01B13/00
Inventor 毛汉文张荣生
Owner 上海胜武电缆有限公司
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