CN204270713U - A multifunctional optical fiber composite medium voltage cable - Google Patents

Abstract

The utility model provides a kind of multifunctional optical fiber composite medium-pressure cable, comprise cable sheath and be extruded in the cable core in cable sheath, filler is provided with between cable sheath and cable core, cable core comprises the conductive unit of three bunchys arranged in parallel be positioned in the middle part of it and is positioned at the optical fiber communication unit of conductive unit side, optical fiber communication unit comprises a root multimode fiber and a monomode fiber, conductive unit comprises the conductor wire core and the wrapped conductor shield on conductor wire core successively that are linked fasciculations by many copper wires, insulating barrier, insulation screen and copper strip shielding layer, cable sheath comprises belting layer and the wrapped inner covering on belting layer successively from inside to outside of coated filler, be mixed with armour and the oversheath of steel wire.The beneficial effects of the utility model are the electrical networks being applicable to 6kv to 35kv transmission line, integrate electric power transfer, Signal transmissions and sensing capability and insulative water-proof is functional.

Description

A multifunctional optical fiber composite medium voltage cable

technical field

The utility model belongs to the field of photoelectric composite wires and cables, in particular to a multifunctional optical fiber composite medium-voltage cable.

Background technique

The power system is an inseparable whole composed of the production, conversion, transmission, distribution and consumption of electric energy, which is closely related to the development of the national economy and people's daily life. With the acceleration of the urbanization process, the proportion of cables in the power system is increasing, and the probability of failure due to the continuous increase of power load and the influence of other external factors is also increasing. In order to effectively prevent and reduce the occurrence of accidents, measures such as increasing the equipment capacity margin, monitoring the operating status of the equipment, and improving the level of power management and technology are usually adopted. Among them, through advanced monitoring technology, online monitoring of the operating status of the equipment can detect safety hazards in time. Hidden dangers and accident avoidance ensure the safe and economical operation of the power system. Distributed optical fiber sensing technology has natural advantages in monitoring the work of optical fibers and cables. Multimode optical fibers can sense the temperature of cables and serve as the transmission medium for optical information. , through the cable safety monitoring based on distributed optical fiber sensing technology, the temperature parameters of the cable and multimode optical fiber are used to provide early warning for the safe operation of the cable. At this time, a multifunctional optical fiber composite cable integrating power transmission, signal transmission and sensing capabilities is urgently needed in the construction process of the power grid of 6kv to 35kv transmission lines.

Invention content

The problem to be solved by the utility model is to provide a multi-functional fiber optic composite medium voltage cable suitable for power grids of 6kv to 35kv transmission lines, which integrates power transmission, signal transmission and sensing capabilities, and has good insulation and waterproof performance.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a multifunctional optical fiber composite medium voltage cable, including a cable sheath and a cable core extruded in the cable sheath, and the cable sheath There is a filler between the cable core and the cable core, which includes three conductive units arranged in parallel in the middle and an optical fiber communication unit located on one side of the conductive unit. The optical fiber communication The unit includes a multi-mode optical fiber and a single-mode optical fiber, and the conductive unit includes a conductive core twisted into a bundle by a plurality of copper wires, a conductor shielding layer and an insulating layer wrapped on the conductive core in turn. Layer, insulation shielding layer and copper tape shielding layer, the cable sheath includes a tape layer covering the filler, an inner lining layer wrapped on the tape layer from the inside to the outside in turn, mixed with steel wire Armor and outer sheath.

Furthermore, both the multi-mode optical fiber and the single-mode optical fiber use glass fiber as a transmission medium for transmitting optical signals.

Further, the multimode optical fiber is a multimode layered or central bundle tube structure, and the multimode optical fiber here is preferably a layered structure.

Further, the single-mode optical fiber is a single-mode layer-stranded or central bundle tube structure, and the single-mode optical fiber here is preferably a layer-stranded structure.

Further, the filler is a filler rope mixed with water-blocking yarn and glass fiber filaments.

The utility model has the advantages and positive effects: adopting the above technical scheme, the cable core including the conductive unit and the optical fiber communication unit has the composite function of power transmission and optical fiber communication, and the photoelectricity is integrated, avoiding repeated wiring of photoelectricity, and realizing simultaneous photoelectricity construction, the construction period is short, and the construction cost is saved; the optical fiber communication unit including a multi-mode optical fiber and a single-mode optical fiber adopts a layer-stranded structure and uses glass fiber as the transmission medium for transmitting optical signals. The diameter is small, the number of optical fiber cores that can be provided is large, and it can provide optical communication signals for multiple users; the multimode optical fiber based on distributed optical fiber sensing technology can sense the temperature of the cable and serve as the transmission medium of optical information, which is conducive to real-time early warning and positioning Failure to ensure the normal operation of the power grid; the optical fiber communication unit is set on one side of the conductive unit, which helps the respective operating functions and the laying process will not affect each other.

Description of drawings

Fig. 1 is a structural representation of the utility model.

In the picture:

1. Cable sheath; 2. Filler; 3. Conductive unit;

4. Multi-mode fiber; 5. Single-mode fiber; 11. Tape layer;

12. Inner lining layer; 13. Armor layer; 14. Outer sheath;

31. Conductive wire core; 32. Conductor shielding layer; 33. Insulation layer;

34. Insulation shielding layer; 35. Copper tape shielding layer.

Detailed ways

Specific embodiments of the present utility model are described in detail below in conjunction with accompanying drawings.

As shown in Figure 1, the utility model provides a multifunctional optical fiber composite medium voltage cable, which includes a cable sheath 1 and a cable core extruded in the cable sheath 1, the cable sheath 1 and the cable sheath 1 A filler 2 is provided between the cable cores, and the cable core includes three conductive units 3 arranged in parallel in the middle and an optical fiber communication unit located on one side of the conductive unit 3. The optical fiber The communication unit includes a multi-mode optical fiber 4 and a single-mode optical fiber 5, and the conductive unit 3 includes a conductive core 31 twisted into a bundle by a plurality of copper wires and is wound on the conductive core 31 in turn. Conductor shielding layer 32, insulating layer 33, insulating shielding layer 34 and copper tape shielding layer 35, the cable sheath 1 includes the tape layer 11 covering the filler 2 and wrapping it in turn from inside to outside on the The inner lining layer 12 on the cladding layer 11, the armor layer 13 mixed with steel wire and the outer sheath 14.

Both the multi-mode optical fiber 4 and the single-mode optical fiber 5 use glass fiber as a transmission medium for transmitting optical signals.

The multimode optical fiber 4 is a multimode layer-stranded or central bundle tube structure, and the multimode optical fiber 4 is preferably a layer-stranded structure.

The single-mode optical fiber 5 is a single-mode layered or central bundle tube structure, and the single-mode optical fiber 5 here is preferably a layered structure.

The filler 2 is a filler rope mixed with water-blocking yarn and glass fiber filaments.

The working process of this example: take a plurality of copper wires twisted into bundles of conductive wire core 31, wrap the conductor shielding layer 32, insulating layer 33 and insulating shielding layer responsible for insulating and isolating power transmission in turn outside the conductive wire core 31 34, wrap the copper tape shielding layer 35 that isolates the conductive unit 3 from the optical fiber communication unit outside the insulating shielding layer 34, and arrange the multimode optical fiber 4 and the single-mode optical fiber 5 included in the optical fiber communication unit on one side of the conductive unit 3, The conductive unit 3 and the optical fiber communication unit are coated with the filler 2 in the tape layer 11 of the cable sheath 1, and the inner lining layer 12 is wrapped around the tape layer 11 in order to strengthen the armor layer of the utility model with mechanical strength 13. Wrapping the armor layer 13 with an outer sheath 14 for isolation and protection from the outside world.

An embodiment of the present utility model has been described in detail above, but the content described is only a preferred embodiment of the present utility model, and cannot be considered as limiting the implementation scope of the present utility model. All equal changes and improvements made according to the application scope of the utility model should still belong to the scope covered by the patent of the utility model.

Claims (5)

1. A multifunctional optical fiber composite medium voltage cable, comprising a cable sheath and a cable core extruded in the cable sheath, a filler is provided between the cable sheath and the cable core , characterized in that: the cable core includes three conductive units arranged in parallel and bundled in the middle and an optical fiber communication unit located on one side of the conductive unit, and the optical fiber communication unit includes a multimode optical fiber and a A single-mode optical fiber, the conductive unit includes a conductive core twisted into a bundle by a plurality of copper wires, and a conductor shielding layer, an insulating layer, an insulating shielding layer and a copper tape shielding layer wound on the conductive core in turn. The cable sheath includes a tape layer covering the filler, an inner liner layer wrapped on the tape layer from inside to outside, an armor layer mixed with steel wire, and an outer sheath. 2. The multifunctional optical fiber composite medium voltage cable according to claim 1, characterized in that: both the multimode optical fiber and the single mode optical fiber use glass fiber as the transmission medium for transmitting optical signals. 3. The multifunctional optical fiber composite medium-voltage cable according to any one of claims 1 or 2, characterized in that the multimode optical fiber is a multimode layer-stranded or central bundle tube structure. 4. The multifunctional optical fiber composite medium-voltage cable according to any one of claims 1 or 2, characterized in that: the single-mode optical fiber is a single-mode layer-stranded or central bundle tube structure. 5. The multi-functional optical fiber composite medium voltage cable according to claim 1, characterized in that: the filler is a filler rope mixed with water-blocking yarn and glass fiber filaments.