CN207909571U - A kind of medium-pressure power cable with protection copper strips - Google Patents
A kind of medium-pressure power cable with protection copper strips Download PDFInfo
- Publication number
- CN207909571U CN207909571U CN201720518012.2U CN201720518012U CN207909571U CN 207909571 U CN207909571 U CN 207909571U CN 201720518012 U CN201720518012 U CN 201720518012U CN 207909571 U CN207909571 U CN 207909571U
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- Prior art keywords
- copper strips
- conductor
- cable
- shielding
- protection copper
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Abstract
The utility model provides a kind of medium-pressure power cable with protection copper strips, belong to power transmission technology field, including conductor, conductor shielding, insulating layer, insulation shielding, metallic shield, gasket for packing, twining package tape, separation sleeve, armor, oversheath, it is followed successively by conductor, conductor shielding, insulating layer, insulation shielding, metallic shield, gasket for packing, twining package tape, separation sleeve, armor, oversheath from inside to outside；The protection copper strips longitudinally runs through whole cable, and the protection copper strips is arranged between the oversheath and the insulating layer or the gasket for packing.The utility model passes through the longitudinally disposed one protection copper strips for running through whole cable in armouring tape, when finding that outer jacket breakage needs positioning, due to being provided with a protection copper strips in cable, and copper strips stable conductivity, cable fault instrument can carry out the positioning of fault point using copper strips as circuit, substantially increase the accuracy of armored cable damaged part positioning.
Description
Technical field
The utility model belongs to power transmission technology field, and in particular to a kind of medium voltage electricity electricity with protection copper strips
Cable.
Background technology
With the continuous input of power grid construction, power grid scale constantly increases, especially urban distribution network circuit, due to by circuit
The limitation of corridor and urban, cable be all made of into the mode laid carry out.Currently, power cable is laid usually with entering
For the modes such as poling is buried or cable duct is set up, is influenced by topography, feelings under water for a long time are will appear compared with Multi sectional cable
Condition occurs.
Since cabling process environment is complicated, cable installation in pipe is taken first passes through laying-out pipeline with guide line, drags
Power cable head using devices such as guards, mechanical traction is carried out after end is fastened by band traction rope to dragger, the other end,
Due to various reasons, in practice of construction operating process, cable jacket is inevitably caused scratch occur even damaged
The case where occur, in time to the breaking point of discovery carry out conscientiously repair after, then will not to the normal operation in cable later stage generate shadow
Ring, but still can there are the possibility that oversheath open defect point is not found in time, as the breaking point was run in the later stage
Cheng Zhong, the situation being immersed in water, water can enter in cable sheath ontology, and the acceleration of insulated electro tree is inherently caused to produce
It is raw, cause great security risk to cable longtime running.
Currently, during cable operation use, equipment department of power grid enterprises is generally spaced 3 years or so and can be carried out to cable
Routine inspection, to ensure the safe operation of cable, in routine inspection, such as there are cable jackets to have breakage that need to determine
It when position is searched, since the armouring tape resistance inside cable is larger, and produces and connects difference problem, cause basic in real process
Rapid-result soon fault point accurately can not be found, severe compromise is caused to cable operation.
Utility model content
In order to when cable jacket has breakage to need positioning searching, can more accurately position damaged part
Position, technical solution used by the utility model are：A kind of having the medium-pressure power cable of protection copper strips, including conductor, leads
Body shielding, insulating layer, insulation shielding, metallic shield, gasket for packing, twining package tape, separation sleeve, armouring tape, oversheath, from inside to outside
It is followed successively by conductor, conductor shielding, insulating layer, insulation shielding, metallic shield, gasket for packing, twining package tape, separation sleeve, armouring tape, outer
Sheath；The conductor, conductor shielding, insulating layer, insulation shielding and metallic shield form conducting wire；The protection copper strips longitudinally passes through
Whole cable is worn, the protection copper strips is arranged between the separation sleeve and the armouring tape.
The utility model has the advantages that：
The utility model is outer when finding by the longitudinally disposed one protection copper strips for running through whole cable in armouring tape
When sheath breakage needs positioning, due to being provided with a protection copper strips, and copper strips stable conductivity in cable, cable fault instrument can
The positioning for carrying out fault point as circuit using copper strips, substantially increases the accuracy of armored cable damaged part positioning.
Description of the drawings
Fig. 1 is a kind of schematic diagram of better embodiment of the utility model.
Main element symbol description
| Conductor 01 | Conductor shielding 02 | Insulating layer 03 |
| Insulation shielding 04 | Metallic shield 05 | Gasket for packing 06 |
| Twining package tape 07 | Separation sleeve 08 | Protect copper strips 09 |
| Armouring tape 10 | Oversheath 11 |
Following specific implementation mode will further illustrate the utility model in conjunction with above-mentioned attached drawing.
Specific implementation mode
The following examples can help those skilled in the art to be more fully understood the utility model, but cannot be with
Any mode limits the utility model.
Referring to Fig. 1, in a kind of better embodiment of the utility model, the medium voltage electricity with protection copper strips
Cable include conductor 01, conductor shielding 02, insulating layer 03, insulation shielding 04, metallic shield 05, gasket for packing 06, twining package tape 07, every
From set 08, protection copper strips 09, armouring tape 10, oversheath 11, the conductor 01 is arranged within the conductor shielding 02, described
Conductor shielding is arranged within the insulating layer 03, and the insulating layer is arranged within the insulation shielding 04, the insulation screen
04 setting is covered within the metallic shield 05, the conductor 01, conductor shielding 02, insulating layer 03, insulation shielding 04 and gold
Belong to shielding 05 and is combined into a conducting wire；
The conducting wire is arranged within the twining package tape 07, and the gap between the conducting wire and the twining package tape 07 makes
It is filled with gasket for packing 06, the twining package tape 07 is set around 06 outside of the conducting wire or the gasket for packing, the twining package tape 07
Set within the separation sleeve 08, the separation sleeve 08 be arranged within the armouring tape 10, and the separation sleeve 08 with
Longitudinal protection copper strips 09 for running through whole cable is provided between the armouring tape 10, the armouring tape 10 is arranged described
In oversheath 11.Briefly, the medium-pressure power cable with protection copper strips is followed successively by conductor 01, conductor screen from inside to outside
Cover 02, insulating layer 03, insulation shielding 04, metallic shield 05, gasket for packing 06, twining package tape 07, separation sleeve 08, protection copper strips 09, armour
Steel loading band 10, oversheath 11.
In the present embodiment, the medium-pressure power cable with protection copper strips includes three conductors 01, three conductor shieldings
02, three insulating layers 03, three insulation shieldings 04, three metallic shields 05, each conductor 01, conductor shielding 02, insulating layer 03, insulation screen
Cover 04 and metallic shield 05 be combined into a conducting wire, three wires concentric stranding, in the medium voltage electricity electricity with protection copper strips
On the cross section of cable, three wires are arranged in isosceles triangle.
Inventor has manufactured experimently 100 meters of the medium-pressure power cable with protection copper strips, if lettering " 0 " rice point is " A points ", print
Word " 100 " rice point is " B points ", 11 people of oversheath has been cut a notch in lettering " 30 " rice point, which is set as fault point
Cable is immersed pond by " C points ", and sheath damage testing experiment is carried out after 15 minutes.Crosslinking pressure-resistant tester is selected to be exchanged
Cable copper strip is connected by pressure test with red folder anode, and black folder cathode connects with water phase, carries out voltage test, and voltage can not rise,
Show that sheath is damaged.Sheath fault point lookup is then carried out, it is fixed to carry out sheath breakage using PC36C digital display DC resistance measuring instruments
Position, electric bridge one end are connected using level clamp with cable " A points " copper strips, and the other end is placed on water after being connected using level clamp
In, actual measured amount resistance is (A-C) 0.1745 Ω；After the fixture of electric bridge " A points " is released, by the same manner and cable " B points " copper
Band is connected, and actual measurement resistance is (B-C) 0.409 Ω；It is in identical environment temperature pair since measurement data only makees calculating reference value
(A-C) the copper strips resistance value of point and (B-C) measure, therefore environment temperature when measurement can be not considered.According to existing inspection
Measured data carries out fault point calculating as the following formula：
A points are away from C point distance=(A-C)/[(A-C)+(B-C)] * 100=0.1745/ (0.1745+0.409) * 100=
29.9m
B points are away from C point distance=(B-C)/[(A-C)+(B-C)] * 100=0.409/ (0.1745+0.409) * 100=
70.1m
It according to measured result, is calculated by formula and obtains, position of failure point " C points " distance " A points " is 29.9 meters, with practical event
30 meters of positions of barrier point are very close, and error is only 0.3% deviation.
The utility model works as hair by the longitudinally disposed one protection copper strips 09 for running through whole cable in armouring tape 10
When existing outer jacket breakage needs positioning, due to being provided with a protection copper strips 09 in cable, and 09 stable conductivity of copper strips is protected,
Cable fault instrument can carry out the positioning of fault point using protection copper strips 09 as circuit, substantially increase armored cable damaged part
The accuracy of positioning.
Above description is the detailed description for the preferable possible embodiments of the utility model, but embodiment is not limited to
The patent claim of the utility model, the same changes or modifications completed under the technical spirit suggested by all the utility model
Change, should all belong to the covered the scope of the claims of the utility model.
Claims (2)
1. a kind of medium-pressure power cable with protection copper strips, including conductor, conductor shielding, insulating layer, insulation shielding, metal screen
Cover, gasket for packing, twining package tape, separation sleeve, armouring tape, oversheath, be followed successively by from inside to outside conductor, conductor shielding, insulating layer, absolutely
Edge shielding, metallic shield, gasket for packing, twining package tape, separation sleeve, armouring tape, oversheath, the conductor, conductor shielding, insulation
Layer, insulation shielding and metallic shield form conducting wire, it is characterised in that it further includes：
Protect copper strips, the protection copper strips longitudinally runs through whole cable, the protection copper strips be arranged the separation sleeve with it is described
Between armouring tape.
2. the medium-pressure power cable with protection copper strips as described in claim 1, it is characterised in that：It is described that there is protection copper strips
Medium-pressure power cable include three conductors, three conductor shieldings, three insulating layers, three insulation shieldings, three metallic shields, each conductor,
Conductor shielding, insulating layer, insulation shielding and metallic shield are combined into a conducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720518012.2U CN207909571U (en) | 2017-05-11 | 2017-05-11 | A kind of medium-pressure power cable with protection copper strips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720518012.2U CN207909571U (en) | 2017-05-11 | 2017-05-11 | A kind of medium-pressure power cable with protection copper strips |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207909571U true CN207909571U (en) | 2018-09-25 |
Family
ID=63569924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720518012.2U Active CN207909571U (en) | 2017-05-11 | 2017-05-11 | A kind of medium-pressure power cable with protection copper strips |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207909571U (en) |
-
2017
- 2017-05-11 CN CN201720518012.2U patent/CN207909571U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A medium voltage power cable with protective copper tape Effective date of registration: 20220811 Granted publication date: 20180925 Pledgee: China Construction Bank Corporation Limited Wuxiang Sub-branch in Nanning Area, Guangxi Pilot Free Trade Zone Pledgor: GUANGXI ZONGLAN CABLE GROUP CO.,LTD. Registration number: Y2022450000132 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |