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Longitudinal weld steel armored cable and forming method thereof

A longitudinal welding seam and steel armor technology, which is applied in the direction of insulated cables, cable/conductor manufacturing, cables, etc., can solve the problems of damaged cable core wire glass cloth tape layer, easy to be worn, and low production efficiency, so as to reduce costs and Labor costs, prevention of welding fluid inflow, good welding quality

Pending Publication Date: 2022-07-12
LIAONING HUAFU PETROLEUM HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the glass cloth tape layer is made of alkali-free glass fiber tape, it is easy to be worn during the process of inserting the seamless steel pipe, thereby damaging the glass cloth tape layer covered by the outer layer of the cable core wire, causing the heating cable to be damaged during use. It is easy to be broken down due to high temperature or high voltage, and there are problems of low production efficiency and unstable product quality
[0004] Moreover, the existing long-distance heat tracing cables are made by welding multiple sections of seamless steel pipes, the process is complicated, and automatic production cannot be realized

Method used

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  • Longitudinal weld steel armored cable and forming method thereof
  • Longitudinal weld steel armored cable and forming method thereof
  • Longitudinal weld steel armored cable and forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like figure 1 and image 3 As shown in the figure, the steel armored cable in this embodiment includes a conductive core wire 1, a tetrafluoro film layer 3, a glass fiber cloth tape layer 4 and a steel armor layer that are sequentially and layer by layer wrapped on the outer surface of the core wire 1 from the inside to the outside. Sheath 5. Among them: the core wire 1, the tetrafluoro film layer 3, the glass fiber cloth tape layer 4 and the steel armor sheath 5 are in close contact with each other, and there is a wire on the wall of the steel armor sheath 5 for connecting and fixing the steel armor. Sheath 5 and extending along the longitudinal welding seam 7 of the steel armored cable, and there is a second strip steel 6 extending parallel to the longitudinal welding seam 7 on the inner side of the longitudinal welding seam 7 and between the glass fiber cloth tape layer 4 and longitudinal welding seam 7. The seam 7 is located in the middle of the second steel strip...

Embodiment 2

[0055] The steel armored cable in this embodiment is basically the same as that in the first embodiment, the difference is that a layer of mica layer 2 is first wound on the outer surface of the core wire 1, such as figure 2 As shown, the material of the mica layer 2 is phlogopite mica paper, that is, the phlogopite mica paper is evenly wound on the outer surface of the core wire 1 at a high speed in a stretched state by using a wrapping machine, so that the phlogopite mica paper is tightly attached to the core wire 1 The thickness of the mica layer 2 is 0.3-2 mm after the phlogopite paper is wound. The phlogopite paper has a high temperature resistance of 600-850°C and a high voltage resistance of 3000v. It will not be hit under high voltage and high temperature working conditions. Therefore, the steel armored cable in this embodiment can be used in a higher temperature and higher voltage environment. In a high temperature and high voltage environment, the tetrafluoro film la...

Embodiment 3

[0057] The steel armored cable in this embodiment is basically the same as that in the second embodiment, the difference is that the cable core 8 is formed after the mica layer 2 and the tetrafluoro film layer 3 are wound on the outer surface of the core wire 1, and the second strip of steel 6 and the first steel strip 9 wrap the cable core wire 8 while injecting the alkali-free glass fiber in a molten state, and welding is performed after the wrapping is completed.

[0058] In this embodiment, alkali-free glass fibers in a molten state are used, and the first steel strip 9 can also be used for wrapping.

[0059] To sum up, the production process of the steel armored cable in the present invention not only improves the production efficiency and product quality, but also reduces the production cost. And it can be produced in unlimited length, effectively improving the scope of use.

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Abstract

The invention discloses a longitudinal weld steel armored cable and a forming method thereof. The method comprises the following steps: firstly, sequentially winding and coating a polytetrafluoroethylene film layer and a glass wool cloth tape layer on the outer surface of a conductive core wire to form a cable core wire; then, when the cable core wire is straightened and extends forwards, the long-strip-shaped first strip steel is synchronously and longitudinally straightened and extends into the position below the cable core wire, the first strip steel is transversely and upwards bent into a barrel shape from the two sides below the cable core wire, and the cable core wire is wrapped in the first strip steel while the first strip steel is bent; the first strip steel forms a steel armor sheath wrapping the cable core wire, and a longitudinal seam is formed at the top of the steel armor sheath; and finally, welding and sealing longitudinal joints, and sequentially carrying out grinding, polishing, drawing and flaw detection treatment. The production efficiency and the product quality are improved, the production cost is reduced, meanwhile, due to the fact that smoke generated by the automatic production technology is small, pollution to the environment is reduced, production of the infinite length can be achieved, and the application range is effectively widened.

Description

technical field [0001] The invention relates to a steel armored cable and a forming method, in particular to a longitudinal welded steel armored cable and a forming method thereof. Background technique [0002] In order to heat the oil layer in oil exploitation, and to ensure a certain oil temperature during oil transportation, some heating technologies are used, such as steam injection, heat transfer oil, etc. For this reason, the creator of this application A heating cable with skin effect disclosed in Chinese patent CN201420459481.8, the heating cable can heat the oil being transported and ensure the oil temperature during actual use, and has achieved certain results. However, after many years of practical use of the heating cable, it is found that there are the following problems: [0003] Since the production process of the heating cable is made of cold-drawn seamless steel pipe by manual ring welding, the conductive core wire needs to be wrapped with a tetrafluoro fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/26H01B7/17H01B7/20H01B7/02
CPCH01B13/2613H01B7/17H01B7/20H01B7/02Y02A30/14
Inventor 谷峰李国勇曹德宇王辉刘洋李杨亮
Owner LIAONING HUAFU PETROLEUM HIGH TECH