Inorganic mineral wrapped insulated flexible fire-proof cable provided with crimping stainless steel sheath and fabrication method of flexible fire-proof cable

A technology of wrapping insulation and inorganic minerals, which is applied in the direction of insulated cables, cable/conductor manufacturing, and insulated conductors. It can solve the problems of easy oxidation of copper materials, inability to produce large lengths, and airtightness assessment, so as to reduce hidden dangers of joints, Effects of reducing accessory costs and ensuring electrical insulation performance

Active Publication Date: 2013-03-20
安徽华能电缆股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, magnesium oxide insulated fireproof cables are affected by manufacturing length, insulation performance and many other aspects, and their application range is small, and they cannot be produced in large lengths and cannot be bent.
At present, the firepr

Method used

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  • Inorganic mineral wrapped insulated flexible fire-proof cable provided with crimping stainless steel sheath and fabrication method of flexible fire-proof cable
  • Inorganic mineral wrapped insulated flexible fire-proof cable provided with crimping stainless steel sheath and fabrication method of flexible fire-proof cable
  • Inorganic mineral wrapped insulated flexible fire-proof cable provided with crimping stainless steel sheath and fabrication method of flexible fire-proof cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Combining figure 1, the fireproof cable of this embodiment, the cable core is composed of a conductor 1 and an insulating layer 2 wrapped around the conductor, the conductor is formed by twisting and pressing 1-61 copper wires, and an inorganic fire-resistant synthetic mica tape is used outside the conductor The insulating layer 2 is formed by stacking and wrapping, and the number of wrapping layers is 5-9 layers. After the insulating layer is wrapped, it is dried and passed the spark withstand voltage test. After the test is passed, the stainless steel strip is longitudinally wrapped and embossed to form an outer sheath 6 , the thickness of the stainless steel strip is 0.30-2.00mm, the embossing depth is 0.5-4.0mm, the embossing distance is 3-8mm, the embossing is equidistant embossing, and the weld 4 is formed after embossing. The stainless steel strip after embossing and The distance between the cable cores is generally about 0.5 mm. The finished product...

Embodiment 2

[0044] Example 2: Combining figure 2 In the fireproof cable of this embodiment, the conductor is two-core semicircular stranding, the conductor is wrapped with 5-9 layers of insulating layer 2, and the insulating layer is wrapped with 4-7 layers of second insulating layer 5. Each semicircular conductor is formed by twisting and pressing 1-61 copper wires. The insulating layer 2 is composed of inorganic fire-resistant synthetic mica tapes, and the two-core conductors are twisted to the right. The stainless steel strip is longitudinally covered with embossing treatment, and the weld seam 4 is formed after embossing, and undergoes a pressurized inflation test. The subsequent process after wrapping the second insulating layer is the same as that of Embodiment 1.

Embodiment 3

[0045] Example 3: Binding image 3 , the fireproof cable of this embodiment, the conductor is a three-core cylindrical conductor, each conductor is wrapped with 5 to 9 layers of insulating layers, and a single conductor is formed by twisting and pressing 1 to 61 copper wires, and after insulation After drying and passing the spark withstand voltage test, three cylindrical insulated wire cores are cabled and combined, the twisting direction of the cable is right, the gap between the cable cores is filled with inorganic fire-resistant filling rope 3, and then wrapped with 4 to 7 layers of second insulating layer , after the second insulating layer is wrapped, the stainless steel strip is longitudinally wrapped and embossed, and the weld 4 is formed after the embossing, and it is subjected to a pressurized inflation test. The subsequent process after the second insulation layer wrapping is the same as that of Embodiment 1.

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Abstract

The invention discloses an inorganic mineral wrapped insulated flexible fire-proof cable provided with a crimping stainless steel sheath. A cable core consists of a conductor and an insulating layer wrapping the outside of the conductor; the conductor is formed through stranding and compacting a plurality of copper wires; the conductor is overlapped and wrapped by multiple layers of an inorganic fire-resistant synthetic mica tape, and the inorganic fire-resistant synthetic mica tape is dried to form the insulating layer; the outside of the cable core is wrapped in an outer sheath longitudinally, the outer sheath is formed through welding and crimping a stainless steel tape; and a weld as long as the cable core and a stainless steel tube is formed on the surface of the stainless steel tube of the outer sheath. The cable is used in crowded theaters, malls, stations and the like and has a very important significance in personnel safety in case of fire, the life and property losses can be reduced to the greatest extent, no smog or toxic gas is generated during combustion, and no pollution is caused to an environment.

Description

Technical field: [0001] The invention relates to a flexible fireproof cable with an inorganic mineral wrapping insulation corrugated stainless steel sheath and a preparation method thereof. Background technique: [0002] In response to global environmental policies, no matter what products are marketed in countries around the world, more and more attention will be paid to "green materials", that is, attention should be paid to the impact on the environment. In addition, statistics show that about half of the fires are caused by electrical accidents, 80% of the fires in shopping malls and singing and dancing entertainment places are caused by electrical fires, and the aging and overloading of wires and cables account for a large proportion. Ordinary PVC wire and cable (insulation and sheath) burn quickly and quickly, fueling the fire, losing power supply capability within 1-2 minutes, and the black smoke released by its combustion decomposition can reach the level of invisibl...

Claims

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Application Information

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IPC IPC(8): H01B7/04H01B7/02H01B7/17H01B7/29H01B7/28H01B7/282H01B13/00
CPCY02A30/14
Inventor 李高强盛业华王洁然
Owner 安徽华能电缆股份有限公司
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