Lightning protection comprehensive cable

Abstract

The invention belongs to the technical field of cables, and relates to a comprehensive anti-lightning cable, which includes a cable core, an inner sheath, an armor layer, an outer sheath, and a grounding layer; Outside the first protective layer, the inner sheath covers the second protective layer, the grounding layer is located outside the second protective layer, the armored layer is outside the grounded layer, and the outer sheath is extruded and coated outside the armored layer; Both the first and second protective layers are mica tapes; it is characterized in that the cable core is composed of multiple electrical units, central isolation elements, and multiple surrounding isolation elements. The electrical units are composed of conductors and insulating layers; the electrical units are distributed in the central isolation The adjacent electrical units around the element are not tangent; the surrounding isolation element is tangent to both the adjacent electrical units and the first protective layer, and the electrical unit is tangent to the first protective layer or has a gap. The invention has the following main beneficial effects: simple manufacture, fast production speed, lower grounding layer resistivity, lower maintenance cost, and normal power transmission under overload and lightning strike conditions.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a comprehensive lightning protection cable. Background technique [0002] In the past 20 years, my country's information industry has grown at an average annual rate of 25%, ahead of other industries, and has become the first pillar industry in the industry. It is estimated that in the next 10 years, the information industry will double again. Among the products in the communication industry, special lightning protection optical cables for communication with higher safety performance will have a good market prospect. With the construction of the 3G network communication network, the lightning protection measures of the communication base station computer room will also be considered to avoid the power interruption of the communication base station and the computer room being caught on fire due to lightning, which will cause a large area of ​​communication interruption...

AI Technical Summary

Problems solved by technology

A lot of research and development has been done in China on lightning protection cables, such as: name: self-supporting lightning protection power cable, patent number: 200920150584.5; name: lightning protection power cable, patent number: 200920150583.0; name: anti-lightning power cable Lightning cable, patent number: 200920150582.6; name: lightning protection power cable with reinforced layer, patent number: 200910140719.4; invention name: multi-group lightning protection cable, patent number: 200910140717.5; invention name: self Bearing type lightning protection optical cable, the patent number is: 200910140715.6 and other patents; however, they still have the following disadvantages: (1) the ground layer adopts the method of oblique wrapping, and the production speed is slow; (2) the armor layer only plays the role of armor (3) After being struck by lightning, part of the grounding layer in the cable is blown, so that the inner sheath melts in the cable core interval and the insulated cores are integrated, making it difficult to separate the insulated cores; it can only be disposed of as waste ; The above-mentioned deficiencies have increased the maintenance cost after the cable lightning strike

[0004] According to this, the domestic applicant applied for a utility model patent named: Lightning Protection Integrated Cable, and the patent number is: 201320382810.9. Although it has achieved a relatively ideal effect of lightning protection, the applicant believes that it still has the following main Defect: The electric unit is located in the inner sheath. When the electric unit is seriously overloaded or the conductor is struck by lightning, the conductor will heat up severely, resulting in softening of the insulation layer, or even dripping, and the conductors in adjacent electric units collide , causing secondary disasters; therefore, the applicant made further improvements to the invention

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