Method for manufacturing prefabricated branch cable

A manufacturing method and technology of prefabricated branches, applied in the direction of cable/conductor manufacturing, cable joints, circuits, etc., can solve the problem that insulation and sheath cannot be layered, insulation and sheath can only be injected at one time, which affects the safety of cable operation. Reliability and other issues, to achieve the effect of reducing the difficulty of production technology, enhancing safety and reliability, and eliminating potential safety hazards

Inactive Publication Date: 2010-03-17
江苏海达电缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies require the purchase of large-scale injection molding units and molds of various specifications and models to adapt to the manufacture of various branch cables; moreover, they have relatively high requirements for operating technology, and the stability is difficult to control; Larger space and more manpower, the production efficiency cannot be improved; in addition, the insulation and sheath cannot be processed in layers, that is, the insulation and sheath can only be injected at one time, and two different materials cannot be used, such as YJV type cable, the insulating sheath at the connection can only be made of cross-linked polyethylene material or polyethylene material or polyvinyl chloride material, and cannot achieve the same insulation as the original structure. The sheath is made of 90°C PVC sheath material, which seriously affects the long-term operation safety and reliability of the cable

Method used

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  • Method for manufacturing prefabricated branch cable

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: VV type cable, when the insulation and sheath materials of the cable main and branch cables are the same, the process is as follows:

[0022] 1) Wrapping process: After the main cable and the branch cable are connected, use the same wrapping material as the insulation and sheath material of the main and branch cables to wrap the connection until the thickness of the wrap is the insulation and sheath of the main cable. 1.2 times the total thickness of the cover; add a layer of high-temperature-resistant polytetrafluoroethylene tape around the cladding layer, then continue to wrap a layer of glass fiber tape, and finally add a layer of soft copper tape;

[0023] 2) Heating process: heat the wrapping part to 30-50°C above the melting point of the material used, and when the insulation and sheath materials inside the wrapping layer are melted, then cool naturally to room temperature to obtain the finished product.

Embodiment 2

[0024] Embodiment 2: VV type cable, its process is:

[0025] 1) Wrapping process: After the main cable and the branch cable are connected, use the same wrapping material as the insulation and sheath material of the main and branch cables to wrap the connection until the thickness of the wrap is the insulation and sheath of the main cable. 1.8 times the total thickness of the cover; add 3 layers of high-temperature-resistant polytetrafluoroethylene tape around the cladding layer, then continue to wrap 2 layers of glass fiber tape, and finally wrap 2 layers of soft copper tape;

[0026] 2) Heating process: heat the wrapping part to 30-50°C above the melting point of the material used, and when the insulation and sheath materials inside the wrapping layer are melted, then cool naturally to room temperature to obtain the finished product.

Embodiment 3

[0027] Example 3: YJV type cable, the insulation and sheath materials of the cable main and branch cables are different, wherein the insulation is cross-linked polyethylene insulation material, and the sheath is 90°C polyvinyl chloride sheath material.

[0028] The process is:

[0029] 1) Insulation layer wrapping process: After the main cable and the branch cable are connected, use cross-linked polyethylene wrapping tape to wrap the joint until the wrapping thickness is 1.2 times the insulation thickness of the main cable; wrap the wrapping layer Add 2 layers of high-temperature-resistant plastic tape outside, then continue to wind with 1 layer of glass fiber tape, and finally wind with 1 layer of soft copper tape;

[0030] 2) Heating process of the insulating layer: heat the wrapping place to 30-50°C above the melting point of the material used, and when the insulating material inside the wrapping layer is melted, it is then naturally cooled to room temperature to fuse the i...

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Abstract

The invention discloses a method for manufacturing a prefabricated branch cable, which is implemented by after connecting a main cable and the branch cable, adopting a band-shaped material lapping with identical insulation and jacket with the original cable, then wrapping with a high temperature resistant polyfluortetraethylene band, a glass fiber band and a soft copper band, adopting coal gas flame or other methods to heat the lapping, raising the temperature until that the in insulation and jacket material inside the lapping layer is fused, cooling and processing. The insulation and jacket can be any material, and the only requirement is that the structure and material are identical with those of the cable. The insulation and jacket can be of the same material or different materials, andcan be finished in one step or multiple steps according to concrete conditions. The invention needs not to adopt an expensive large injection molding set or dies in the prior art, thus reducing production cost and improving safety and reliability.

Description

technical field [0001] The invention relates to a method for manufacturing a cable, in particular to a method for manufacturing a prefabricated branch cable. Background technique [0002] As we all know, the branch cable is to connect the conductor of the main cable and the conductor of the branch cable together in the factory, and then use the corresponding injection molding equipment to inject the melted insulating sheath material into the matching mold, so as to complete the branch cable. Manufacturing, as described in Chinese patents 03278121.0, 98241548.6, 200420077772.7, 200820065152.X, etc. However, these technologies require the purchase of large-scale injection molding units and molds of various specifications and models to adapt to the manufacture of various branch cables; moreover, they have relatively high requirements for operating technology, and the stability is difficult to control; Larger space and more manpower, the production efficiency cannot be improved...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01R43/00H02G15/08
Inventor 宋青林吕松林梅正强张宣东张黎辉张美君
Owner 江苏海达电缆有限公司
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