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A fire-resistant optical fiber composite medium-voltage cable and its manufacturing process

An optical fiber compounding and manufacturing process technology, applied in cable/conductor manufacturing, power cables including optical transmission components, coaxial cables, etc., can solve the problems of short normal power supply time, unfavorable escape and rescue, etc. The effect of improving the failure response speed

Active Publication Date: 2018-03-16
上海朗达电缆(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an improved fire-resistant optical fiber composite medium-voltage cable and its manufacturing process, which can overcome some shortcomings in the prior art that the cable maintains normal power supply in the case of flames for a short time, which is not conducive to escape and rescue

Method used

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  • A fire-resistant optical fiber composite medium-voltage cable and its manufacturing process
  • A fire-resistant optical fiber composite medium-voltage cable and its manufacturing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Cable core

[0036] 1.1 Conductor stranding. The round compact copper conductor is adopted, and the conductor structure is dense. Under the same cross-sectional area of ​​the conductor, the outer diameter of the conductor after compaction is reduced by about 10%, thereby reducing the outer diameter of the product and facilitating installation and laying.

[0037] 1.2 Three-layer co-extrusion. Conductor shielding layer, insulation layer, and insulation shielding layer adopt a three-layer co-extrusion production method, and the conductor shielding material, cross-linked polyethylene insulation material, and insulation shielding material are coated on the compact conductor at one time, and the extrusion production process is adopted , so that the three layers of materials are closely combined, while avoiding secondary pollution of insulating materials, ensuring the process quality of the product.

[0038] 1.3 Metal shielding. Overlap and wrap a layer of 0.1-0.12mm co...

Embodiment 2

[0051] The manufacturing process includes the following steps: a. Making cable cores, compressing the circular copper conductors so that the outer diameter of the compacted conductors is reduced by 11%, and then extruding the insulating and shielding composite layer outside the compacted conductors , to make the cable core for later use; b. To make the optical cable unit, first make the optical fiber loose tube, which is provided with 4 core optical fibers, and surrounds 6 optical fiber loose tubes into a circle, and the center of the circle is provided with a strengthening member. Then the optical fiber loose tube is clad with a protective sleeve to make an optical cable unit, between the protective sleeve and the loose tube, between the loose tube and the reinforcement is filled with water-blocking yarn; c, product combination, the optical cable unit After being extruded together with the cable core, it is cabled, and the heat insulation layer, fire-resistant layer, oxygen ba...

Embodiment 3

[0056] A fire-resistant optical fiber composite medium-voltage cable, characterized in that: the composite medium-voltage cable is composed of an outer cladding and an inner core, and the inner core is formed by twisting a cable core and an optical cable unit; the optical cable unit is composed of a reinforced parts and loose tubes arranged around the reinforcing parts are twisted into cables; the cable core is composed of a conductor and an insulating and shielding composite layer extruded on the outside of the conductor; the outer cladding is composed of a heat insulation layer, a refractory layer, Oxygen barrier layer, impact-resistant layer and outer sheath layer are wrapped in sequence.

[0057] The optical cable unit is provided with a loose tube group consisting of 5 loose tubes. The center of the loose tube group is provided with a reinforcement made of resin fiber reinforced plastic FRP. The outer extruded protective sleeve of the loose tube group is , each loose tube...

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Abstract

The invention relates to a fire-resistant optical fiber composite medium-voltage cable, which is characterized by consisting of an outer cladding layer and an inner core, wherein the inner core is formed by twisting a cable wire core and an optical cable unit; the optical cable unit is twisted into a cable by a reinforcing element and a loose tube arranged on the periphery of the reinforcing element; the cable wire core is formed by a conductor and an insulation shielding composite layer; the insulation shielding composite layer is formed on the outer side of the conductor in an extruded wrapping way; and the outer cladding layer is formed by sequentially cladding a heat insulation layer, a fire-resistant layer, an oxygen barrier layer, an anti-impact layer and an outer sheath layer. The fire-resistant optical fiber composite medium-voltage cable simultaneously has information communication and electric power transmission functions; an optical unit is directly compounded on the edge side of a cabling core of an electric power cable by using a nonmetallic structure; the outer diameter of a product is identical to the outer diameter of an ordinary low-voltage electric power cable; under the condition of not increasing the laying cost of the cable, functions such as the upper end connection of the electric power optical fiber to the home and electric power line monitoring and early warning functions can be synchronously realized; the fault response speed is accelerated; and the line maintenance cost is reduced.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a fire-resistant optical fiber composite medium-voltage cable and its manufacturing process. Background technique [0002] With the rise of the Internet of Things, the market has put forward a new demand for special optical fiber composite cables integrating telecommunications, power transmission, television, Internet, Internet of Things and other multi-network integration functions, making them an important component in the construction of smart grids. [0003] At present, with the rapid development of my country's social economy, there are more and more important engineering facilities such as subways, tunnels, power plants, and nuclear power plants, as well as large supermarkets, exhibition centers, and other crowded places. The system puts forward requirements for the safety performance of 6-35kV cables under fire conditions. It is required that the cables can still maintain no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/295H01B7/29H01B7/18H01B7/17H01B9/02H01B9/04H01B11/22H01B7/285H01B13/22H01B13/32H01B13/24
CPCH01B7/17H01B7/18H01B7/285H01B7/29H01B7/292H01B7/295H01B9/003H01B9/005H01B9/02H01B9/04H01B11/22H01B13/22H01B13/24H01B13/32
Inventor 王浩淼王成忠刘源
Owner 上海朗达电缆(集团)有限公司
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