CN102005259A

CN102005259A - Submarine optical fiber composite high-voltage cable with detection function

Info

Publication number: CN102005259A
Application number: CN2010105778514A
Authority: CN
Inventors: 匡松文
Original assignee: Hengyang Hengfei Cable Co Ltd
Current assignee: Hengyang Hengfei Cable Co Ltd
Priority date: 2010-12-07
Filing date: 2010-12-07
Publication date: 2011-04-06

Abstract

The invention discloses a submarine optical fiber composite high-voltage cable with a detection function. The cable comprises cable cores, an inner armor layer and an outer armor layer, wherein the inner armor layer is twisted on the cable cores; the outer armor layer is twisted on the inner armor layer; an outer sheath is formed on the outer armor layer by extrusion molding; an optical fiber sensor unit is arranged in a gap of the cable cores of the cable for measuring the temperature of the cable; and a bedding layer is arranged between the inner armor layer and the outer armor layer and an optical fiber sensor unit is distributed between the inner armor layer and the outer armor layer for detecting damage of the cable. A natural characteristic that transmission loss is increased when the optical fiber is used for bearing bending or transverse pressure is used, the damage of the cable can be detected, and accurate positioning can be realized through an instrument. The optical fiber sensor in the cable cores is used for measuring the temperature variation of the cable core of power cables.

Description

Seabed fiber composite high pressure cable with measuring ability

Technical field

The present invention relates to the cable technology field, particularly a kind of seabed fiber composite high pressure cable that has Fibre Optical Sensor and have measuring ability.

Background technology

The possible hook block of submarine cable owing to ship anchor or Fishing tool, and suffer damage with the friction of sea bed rock at the incoming tide.Therefore detect the existence of this class damage, and to determine spot failure for the maintenance of submarine cable be very important.When optical fiber was subjected to transverse pressure, the loss of optical fiber increased, and therefore can detect the mechanical damage of submarine cable by the observation loss.On the other hand, as everyone knows, make transducer with optical fiber and can also measure the cable internal temperature, can find whether cable transships or short circuit, line disconnection is reduced the loss so that in time report to the police, optical fiber has communication function simultaneously, therefore, important cable products during the seabed fiber composite cable is built as current island intelligent grid, it has merged the function of communication and electric power, the many nets that can effectively realize telecommunications network, electric transmission network, television network, the Internet etc. merge, and reduce the cost of networking, have cost performance preferably.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of and can detects damage of ship anchor and wire armoring abrasion deformation or cable fault and cause having Fibre Optical Sensor and having the seabed fiber composite high pressure cable of measuring ability of temperature rise variation.This seabed fiber composite high pressure cable utilizes distributed fiberoptic sensor measuring the variations in temperature of cable, but the crooked deformation detection streamer that utilizes optical fiber equally and can accurately be located because wearing and tearing, the ship grasp hangs or other outside cause causes outer damage.

Technical problem to be solved by this invention can be achieved through the following technical solutions:

A kind of seabed fiber composite high pressure cable with measuring ability, comprise cable conductor and be stranded in the inner armor layer on the described cable conductor and be stranded in armoured layer on the described inner armor layer, extrusion molding has oversheath on described armoured layer, it is characterized in that, in the cable conductor space, be provided with in order to measure the Fibre Optical Sensor unit of cable temperature.

The present invention is provided with course and is distributed with the Fibre Optical Sensor unit that damages in order to detection streamer between described inside and outside armour.

Described cable conductor also comprises three cores, two gasket for packing unit, three cores, two gasket for packing unit with in order to sheath in the extrusion molding of stranded back, the Fibre Optical Sensor unit of measuring cable temperature.

Described core by conductor, be coated on conductor shield on the conductor outer surface, be coated on XLPE insulating barrier on the conductor shield outer surface, be coated on insulation screen on the XLPE insulating barrier outer surface, be coated on the belting layer that blocks water on the insulation screen outer surface, the lead sheath layer that is coated on the belting layer outer surface that blocks water constitutes.

Described Fibre Optical Sensor unit in order to the measurement cable temperature comprises two gradual change shape index fiber fibre cores, PE lining core, PE sheath, lead sheath, the anti-element of opening, a wherein anti-element is positioned at the center of PE lining core, two gradual change shape index fiber fibre cores are that the center is symmetrically distributed in the PE lining core with the anti-element of opening, the PE sheath is coated on the outer surface of PE lining core, and lead sheath is coated on the PE sheath.

The described Fibre Optical Sensor unit that damages in order to detection streamer is filled with greasy for preventing water by monomode fiber, stainless steel tube, sheath in described stainless steel tube, described monomode fiber is arranged in the stainless steel tube, and sheath is coated on the stainless steel tube.

Because loss increases this natural characteristic when having adopted technique scheme, the present invention to utilize optical fiber to bear bending or transverse pressure, can detect the damage of cable, and accurately locate by instrument.Variations in temperature with the fiber sensor measuring electric-cable core in the cable conductor.

The present invention compared with prior art has following advantage:

1. light harvesting fibre and power transmission and distribution cable are avoided the secondary wiring, can effectively reduce the expense of construction, network construction.

2. loss increases this natural characteristic when utilizing optical fiber to bear bending or transverse pressure, can on-line monitoring goes out the degree of impairment of cable, and quick and precisely locatees by instrument, and the efficient height is repaired thin the time to cable, reduces the loss.

3. make transducer with optical fiber and can also measure cable temperature, can on-line monitoring cable working condition, when running into emergency cable overload or short circuit, can in time report to the police and reduce the loss with line disconnection.

4, light unit and power cable do not disturb mutually, and compatible under the long-term work temperature, service life is longer, has excellent generalization values.

Description of drawings

Fig. 1 has the radially sectional schematic diagram of the seabed fiber composite high pressure cable of measuring ability for the present invention.

Fig. 2 is the radially sectional schematic diagram of the present invention in order to the Fibre Optical Sensor unit of measurement cable temperature.

Fig. 3 is the radially sectional schematic diagram of the present invention in order to the Fibre Optical Sensor unit of detection streamer damage.

Embodiment

For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth embodiments of the present invention.

Referring to Fig. 1, a kind of seabed fiber composite high pressure cable with measuring ability, comprise cable conductor and be stranded in the interior zinc-coated wire armour 100 on the cable conductor and be stranded in external galvanized layer wire armoring layer 200 on the zinc-coated wire armour 100, extrusion molding has oversheath 300 on the zinc-coated wire armour 200 outside.Between interior zinc-coated wire armour 200 and external galvanized layer wire armoring layer 200, be provided with course 300, in the space of course 300, be distributed with the Fibre Optical Sensor unit 400 of the six roots of sensation in order to the detection streamer damage.

Cable conductor comprises three cores 110, two gasket for packing unit 120, one in order to measure the Fibre Optical Sensor unit 130 of cable temperature, three cores 110, two gasket for packing unit 120 and one twist together sheath 140 in the extrusion molding on the intertwist body in order to the Fibre Optical Sensor unit 130 of measuring cable temperature.

Core 110 by conductor 111, be coated on conductor shield 112 on conductor 111 outer surfaces, be coated on XLPE insulating barrier 113 on conductor shield 112 outer surfaces, be coated on insulation screen 114 on XLPE insulating barrier 113 outer surfaces, be coated on the belting layer 115 that blocks water on insulation screen 114 outer surfaces, the lead sheath layer 116 that is coated on belting layer 115 outer surfaces that block water constitutes.

Referring to Fig. 2, comprise two gradual change shape index fiber fibre cores 131, PE lining core 132, PE sheath 133, lead sheath 134, the anti-element 135 of opening in order to the Fibre Optical Sensor unit 130 of measuring cable temperature, a wherein anti-element 135 is positioned at the center of PE lining core 132, two gradual change shape index fiber fibre cores 131 are that the center is symmetrically distributed in the PE lining core 132 with the anti-element 135 of opening, PE sheath 133 is coated on the outer surface of PE lining core 132, and lead sheath 134 is coated on the PE sheath.Adopt such to prevent the immersion of water in order to the Fibre Optical Sensor unit 130 of measuring cable temperature.

Referring to Fig. 3, in order to the Fibre Optical Sensor unit 400 of detection streamer damage by a monomode fiber 410, stainless steel tube 420, sheath 430, be filled with greasy for preventing water 440 in stainless steel tube 420, monomode fiber 410 is arranged in the stainless steel tube 420, and sheath 430 is coated on the stainless steel tube 420.Fibre Optical Sensor unit 400 in order to the detection streamer damage adopts such composite construction that the immersion effect of mechanical damage of preventing and moisture is arranged.

More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims

1. seabed fiber composite high pressure cable with measuring ability, comprise cable conductor and be stranded in the inner armor layer on the described cable conductor and be stranded in armoured layer on the described inner armor layer, extrusion molding has oversheath on described armoured layer, it is characterized in that, in the cable conductor space, be provided with in order to measure the Fibre Optical Sensor unit of cable temperature.

2. the seabed fiber composite high pressure cable with measuring ability as claimed in claim 1 is characterized in that, is provided with course and is distributed with the Fibre Optical Sensor unit that damages in order to detection streamer between described inside and outside armour.

3. the seabed fiber composite high pressure cable with measuring ability as claimed in claim 1, it is characterized in that, described cable conductor also comprises three cores, two gasket for packing unit, three cores, two gasket for packing unit with in order to sheath in the extrusion molding of stranded back, the Fibre Optical Sensor unit of measuring cable temperature.

4. the seabed fiber composite high pressure cable with measuring ability as claimed in claim 1, it is characterized in that, described core by conductor, be coated on conductor shield on the conductor outer surface, be coated on XLPE insulating barrier on the conductor shield outer surface, be coated on insulation screen on the XLPE insulating barrier outer surface, be coated on the belting layer that blocks water on the insulation screen outer surface, the lead sheath layer that is coated on the belting layer outer surface that blocks water constitutes.

5. as the described seabed fiber composite high pressure cable of each claim of claim 1 to 4 with measuring ability, it is characterized in that, described Fibre Optical Sensor unit in order to the measurement cable temperature comprises two gradual change shape index fiber fibre cores, PE lining core, PE sheath, lead sheath, the anti-element of opening, a wherein anti-element is positioned at the center of PE lining core, two gradual change shape index fiber fibre cores are that the center is symmetrically distributed in the PE lining core with the anti-element of opening, the PE sheath is coated on the outer surface of PE lining core, and lead sheath is coated on the PE sheath.

6. as the described seabed fiber composite high pressure cable of each claim of claim 2 to 4 with measuring ability, it is characterized in that, the described Fibre Optical Sensor unit that damages in order to detection streamer is by monomode fiber, stainless steel tube, sheath, in described stainless steel tube, be filled with greasy for preventing water, described monomode fiber is arranged in the stainless steel tube, and sheath is coated on the stainless steel tube.