CN109903908A - Fiber composite power cable - Google Patents
Fiber composite power cable Download PDFInfo
- Publication number
- CN109903908A CN109903908A CN201711306233.4A CN201711306233A CN109903908A CN 109903908 A CN109903908 A CN 109903908A CN 201711306233 A CN201711306233 A CN 201711306233A CN 109903908 A CN109903908 A CN 109903908A
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- cable
- optical fiber
- metal shell
- sheath
- power cable
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Abstract
The present invention relates to the power cables such as high-voltage cross-linked polyethylene sheathed (CV cable), specially a kind of fiber composite power cables.Between cable core and sheath, optical fiber is placed in the cable core optical fiber along cable length direction is snakelike.Optical fiber of the present invention is placed in from cable conductor closer proximity, can prevent the fiber composite power cable of optical transmission loss with high-acruracy survey cable core temperature；In the present invention, optical fiber will not lift up song when power cable is bent or distorts.
Description
Technical field
The present invention relates to power cables such as high-voltage cross-linked polyethylene sheatheds (CV cable), specially a kind of optical fiber is multiple
Close power cable.
Background technique
Because there are resistance to generate heat when power cable is powered, the crosslinked polyethylene as insulator cannot be under high temperature.
Insulator design temperature is to 90 degree, if it exceeds this temperature, because polyethylene softens conductor in cable core (by conductor and absolutely
Edge body constitute) in move.Thus, it is necessary to monitor whether to be more than design value by measurement cable core temperature.At this point, because leading
The temperature of body is difficult to measure, so needing in the place measurement as close as possible to conductor.Therefore, it is contemplated that in cable core and sheath
Between place optical fiber, measure the temperature of cable core.It is continuously placed because optical fiber can be prolonged to cable length direction, it can be to cable
All positions carry out temperature measurement.It, can be closer to conductor in addition, by the way that optical fiber to be placed between core and sheath
Place carries out high-precision temperature measuring.
When the temperature of conductor and insulator increases, because cable core is along the multi-direction elongation of length, if optical fiber straight line put
It sets, the optical fiber being fixed in cable core is likely to occur optical transmission loss by tension due to that cannot extend therewith.
Accordingly, there exist for example: Chinese invention patent application (Publication No. CN1624812A) is disclosed to be had for measuring
The underground power cable of the optical fiber of Temperature Distribution uses support member in the two sides of optical fiber, on spiral wound to cable core
Technology.In the power cable, the optical fiber for measuring Temperature Distribution is accommodated in the stainless steel tube with high intensity,
And fibre-optic catheter is placed between the core of cable and sheath.When being arranged fibre-optic catheter in power cable, in cable
In be additionally provided with the intensity backing material more relatively low than fibre-optic catheter simultaneously, to prevent optical fiber by damage and in preventing
Insulating layer is destroyed by fibre-optic catheter.
But if spiral wound optical fiber in this way, such as generation when power cable is wound into tray or pulls out from tray
Cable bend, such as cable distortion is generated when laying power cable, optical cable bends or distorts therewith, the hand of spiral distorts
When optical fiber tied tight elongation or antispin direction distort when fiber slack, bending or distortion restore when generate lift up song, it is possible to
Generate optical transmission loss.
In addition, sheath plays shielding, waterproof, ground connection, if sheath uses plastics, cannot give full play to waterproof and
Ground connection effect, so more using metal.If identical power cable is wound into tray or is pulled out from tray using metal
When, it is necessary to there is a degree of flexibility.When protective metal shell uses lead, although lead is flexible because softness has under smooth pipe,
But aluminium is gradually used because of lead nocuousness.When protective metal shell uses aluminium, jacket surface is made into corrugated shape, is scratched to have
Property.
Using such protective metal shell for being formed with corrugated shape, in the process for forming corrugated shape, in protective metal shell
Outside forms recess (being seen as protruding portion from inside), and gap is arranged between protective metal shell and cable core.But because
Cable core is very heavy, and cable core is moved to the lower section in protective metal shell in forming corrugated shape process.At this time if light
On fine spiral wound to cable core, all exist around cable core, for below protective metal shell, fibre clip is in electricity
Protruding portion on the inside of cable core and corrugated shape squeezes impaired, it is possible to optical transmission loss occur.
Summary of the invention
One of the objects of the present invention is to provide a kind of optical fiber to be placed in from cable conductor closer proximity, can be high-precision
Degree measurement cable core temperature, prevents the fiber composite power cable of optical transmission loss.
Elongation will not be generated another object of the present invention is to provide optical fiber when a kind of bending of power cable or distortion or is lifted up
Bent fiber composite power cable.
Another object of the present invention is to provide one kind optical fiber is prevented to be damaged in forming corrugated shape process, shape is used
The fiber composite power cable of corrugated shaped metal sheath.
The technical scheme is that
A kind of fiber composite power cable, optical fiber is between cable core and sheath, and optical fiber is along cable length direction
It is snakelike to be placed in the cable core.
The fiber composite power cable, sheath are protective metal shell, and entire protective metal shell is alongst around
It is formed with corrugated shape.
The fiber composite power cable is formed in corrugated shape process, the optical fiber and the gold in protective metal shell
Belong to and gap is set between the corrugated shape Medial extrusion of sheath.
The fiber composite power cable, sheath are protective metal shell, and entire protective metal shell is alongst around
It is formed with spiral-shaped.
The fiber composite power cable is formed in spiral-shaped process in protective metal shell, the optical fiber and the gold
Belong to and gap is set between the spiral-shaped Medial extrusion of sheath.
The beneficial effects of the present invention are:
1, between cable core and sheath, optical fiber is located at from conductor closer proximity optical fiber of the present invention, can be high-precision
Degree measurement cable core temperature.In addition, optical fiber is along the snakelike placement of power cable length direction, power cable bending or distortion
When optical fiber will not lift up song, it is possible to prevent optical transmission loss.
2, when sheath of the present invention uses protective metal shell, entire protective metal shell is alongst formed with ripple around
Shape is spiral-shaped, makes it have flexibility, even if power cable bends, along the optical fiber of the snakelike placement of cable core, no
It can be squeezed impaired.So optical transmission loss can be prevented.
3, optical fiber of the present invention is in forming corrugated shape or spiral-shaped process, corrugated shape or spiral-shaped of getting along well
The protruding portion of inside is interfered, and the snakelike placement between cable core and sheath, fibre clip is in cable core and corrugated shape or spiral shell
The protruding portion on the inside of shape is revolved, will not be squeezed impaired.So optical transmission loss can be prevented.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
As shown in Figure 1, fiber composite power cable of the present invention, optical fiber is between cable core 12 and sheath, optical fiber edge
Cable length direction is snakelike is placed in the cable core 12.Sheath has plastic sheath and protective metal shell, especially right below
Formation using aluminium or steel has spiral-shaped protective metal shell to be illustrated.Metallic cable core 12 include cable conductor 1,
It is covered on the conductor semiconductive band 2 of the periphery of cable conductor 1, conductor is covered on and is partly led with the extrusion of 2 periphery of semiconductive band
Shield layer 3, is covered on XLPE (friendship at XLPE (crosslinked polyethylene) insulating layer 4 for being covered on 3 periphery of extrusion semiconductive shielding layer
Connection polyethylene) periphery of insulating layer 4 extrusions insulation screen 5 and be covered on and squeeze out the peripheral longitudinal water-blocking of insulation screen 5
6 (being formed by semiconductive material water-proof material is wrapped) of layer.Sheath includes protective metal shell 7 and is covered on the nonmetallic of the periphery of protective metal shell 7
Sheath 8, entire protective metal shell 7 are alongst formed with around spiral-shaped, there is non metallic sheath outside protective metal shell 7
8, when placing optical fiber 9 in the spiral-shaped process of the production protective metal shell 7, the not spiral shell with the protective metal shell 7 of optical fiber 9
The contact of shape Medial extrusion is revolved, i.e., is arranged between optical fiber 9 and the spiral-shaped Medial extrusion of the protective metal shell 7 empty
Gap.It, can be with placed longitudinally fiber optic protection layer of optical cable 10 on snakelike optical fiber 9 in the present embodiment.In the present embodiment, protective metal shell 7 can
Think that lead, aluminium or steel sheath, non metallic sheath 8 are plastic sheath.
7 shape of protective metal shell in the present embodiment can be spiral-shaped.,
The manufacturing process of fiber composite power cable of the present invention is as follows:
1) it is jewelling process that process, which is added, in optical fiber 9.
2) optical fiber 9 is snakelike is placed in right above cable core 12.Snakelike pitch is B, and snake width is S, is seen.
3) optical fiber 9 is clung in cable core 12 perpendicular to cable using adhesive plaster 11.Adhesive plaster long 50mm, wide 10mm or less.
4) optical fiber is protected with 2 layers of 2.0mm thickness semi-conductive buffer water-blocking band (fiber optic protection layer of optical cable 10), bandwidth 160mm.Semiconductive
Respectively bonding is primary at the snakelike wave crest of optical fiber every 500-600mm for buffer water-blocking band two sides adhesive tape, semi-conductive buffer water-blocking band
It is bonded when connector using adhesive tape upper layer and lower layer.
5) optical fiber is not added within the scope of mouth 0.3m before and after product.
6) take-up reel barrel dliameter used in jewelling process is not less than cable reel barrel dliameter D.
Experimental result:
Wherein, optical fiber serial number 1 and 2 is respectively two optical fiber in same cable.Optical fiber snake laying snake width of the present invention and
The determination of pitch is as follows, it is assumed that snake width is S, and half pitch is B, pitch P, and the cable reel barrel dliameter for winding cable is D, light
Elongation on fibre after disk is ε 1, and the elongation in cable core after disk is ε 2, angle a, arc length L, and the radius of arc is r,
Outside diameter of cable d at optical fiber.R=[(1 2B) 2+S 2] 2S, a=ASIN (B 2r), L=a × r ε 1=(L-B)/B；ε 2=[2 π
(D/2+d1/2+d2/2)]/[2 π (D/2+d1/2)] -1=d2/ (D+d1)；Wherein, the radius of cable reel 16: D/2, the present invention
The radius of cable 17: d1/2, the radius of cable core 12 of the present invention: d2/2；
Meet design requirement as 1 > ε 2 of ε.
Above-mentioned calculating formula is minimum when can calculate the snakelike placement of optical fiber according to the elongation generated when being wound into cable reel
Surplus.
It is as follows using the effect as above designed: even if power cable is wound into tray or generates cable when pulling out from tray
Bending, because optical cable bends or distorts therewith, prevents optical transmission loss.
In addition, water blocking tape can be placed as fiber optic protection layer of optical cable 10 on snakelike optical fiber of the invention；Optical fiber of the present invention can be with
For multimode fibre or single mode optical fiber, if thering is measuring temperature to be easy and cheap effect using multimode fibre.
9 outer layer of optical fiber of the present invention can be coated with guard block 13, and guard block 13 is located at stainless steel flexible hose 14 and PE
It can be the tubbiness knitting member woven with filament between (polyethylene) coating 15, if optical fiber does not have to a certain degree
Movability and rigidity, because of snakelike shape distortion, it may occur that technical problem not mobile with cable.As guard block
Material, if the tubbiness knitting member woven using filament, has best effect.
2 difference from Example 1 of embodiment is: 7 shape of protective metal shell in the present embodiment can also be corrugated
Shape.
Claims (5)
1. a kind of fiber composite power cable, optical fiber is between cable core and sheath, it is characterised in that: optical fiber is along cable
Length direction is snakelike to be placed in the cable core.
2. fiber composite power cable according to claim 1, it is characterised in that: sheath is protective metal shell, entire metal
Sheath is alongst formed with corrugated shape around.
3. fiber composite power cable according to claim 2, it is characterised in that: form corrugated shape work in protective metal shell
In sequence, gap is set between the corrugated shape Medial extrusion of the optical fiber and the protective metal shell.
4. fiber composite power cable according to claim 1, it is characterised in that: sheath is protective metal shell, entire metal
Sheath is alongst formed with around spiral-shaped.
5. fiber composite power cable according to claim 4, it is characterised in that: form spiral-shaped work in protective metal shell
In sequence, gap is set between the optical fiber and the spiral-shaped Medial extrusion of the protective metal shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711306233.4A CN109903908A (en) | 2017-12-11 | 2017-12-11 | Fiber composite power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711306233.4A CN109903908A (en) | 2017-12-11 | 2017-12-11 | Fiber composite power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109903908A true CN109903908A (en) | 2019-06-18 |
Family
ID=66941934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711306233.4A Withdrawn CN109903908A (en) | 2017-12-11 | 2017-12-11 | Fiber composite power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109903908A (en) |
-
2017
- 2017-12-11 CN CN201711306233.4A patent/CN109903908A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190618 |