CN114566910B - Overhead transmission line insulation drainage wire based on overhead insulated cable and preparation method - Google Patents
Overhead transmission line insulation drainage wire based on overhead insulated cable and preparation method Download PDFInfo
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- CN114566910B CN114566910B CN202210247434.6A CN202210247434A CN114566910B CN 114566910 B CN114566910 B CN 114566910B CN 202210247434 A CN202210247434 A CN 202210247434A CN 114566910 B CN114566910 B CN 114566910B
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- insulated cable
- transmission line
- drainage wire
- overhead insulated
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- 238000009413 insulation Methods 0.000 title claims abstract description 58
- 230000005540 biological transmission Effects 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000565 sealant Substances 0.000 claims abstract description 23
- 239000004020 conductor Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 238000002788 crimping Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 239000012212 insulator Substances 0.000 description 7
- 210000003608 fece Anatomy 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011426 transformation method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000028804 PERCHING syndrome Diseases 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Cable Accessories (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention discloses an overhead transmission line insulation drainage wire based on an overhead insulated cable and a preparation method thereof, wherein the overhead transmission line insulation drainage wire comprises an overhead insulated cable, a cold-shrink terminal head, a strain clamp, a heat-shrink tube and sealant; and after the mounting position of the cold-shrink terminal is determined, the cold-shrink terminal is sleeved on the outer side of the overhead insulated cable, the end part is sealed by using sealant, insulating layers at two ends of the overhead insulated cable are stripped by using wire stripping pliers, the exposed wire part is crimped with a strain clamp, the strain clamp is sealed by using sealant at the contact part of the strain clamp and the insulating layer, and then the strain clamp is coated by using a heat-shrinkable tube. According to the invention, the existing 10kV or 35kV overhead insulated cable is utilized to carry out insulation transformation on the 110kV and 220kV drainage wire, the original overhead line structure is not changed, the original drainage wire is only required to be detached, the insulated drainage wire is installed, the implementation is convenient, and the insulation performance on the ground wire and the iron tower is good.
Description
Technical Field
The invention relates to transmission line equipment, in particular to an overhead transmission line insulation drainage wire based on an overhead insulation cable and a preparation method thereof.
Background
In recent years, with ecological environment changes, bird activity areas are enlarged, and bird activity frequency is increased, so that bird damage accidents occur. Even if various bird prevention measures are adopted, bird accidents can not be stopped. The bird disaster tripping accident of the power transmission line directly affects the power quality and reliability of the power consumer.
Existing control measures for bird faults at present include: a bird penetration preventing device, a bird baffle preventing device, a bird droppings preventing insulator and the like for preventing long-string bird droppings from falling off; the latter means that bird droppings are attached to the surface of the insulator, and the surface flashover caused in a humid environment is a special form of insulator pollution flashover fault, and besides a device for blocking bird droppings from falling, an antifouling insulator or a composite insulator can be used for preventing flashover. Although the existing bird prevention measures reduce flashover faults between wires and cross arms caused by bird droppings and surface flashover faults of insulators, flashover between ground wires and jumpers caused by movement of bird perching points to the outer side of a tower can also occur, and the reason is that part of tension resistance or corner tower levels are not parallel to the wire trend, a wire picking cross arm cannot be parallel to the wire trend, a wire picking cross arm on one side is higher, the distance between the wire picking cross arm and the ground wires is closer, air gaps are reduced, and the bird droppings are easy to cause single-phase grounding of a circuit, so that the circuit trips. The main reason for the fault is that jumper angle steel and the drainage wire are not covered by an insulating sheath, so that a bird damage blind spot is prevented, and bird dropper flashover is further caused. In order to reduce bird dropper flashover, insulation modification is needed for the drainage wire.
The overhead insulated cable product is a novel series product for transmitting electric energy of an overhead transmission line, is preferable for constructing and reforming a 10kV transmission engineering line of a power grid, and is the most suitable series product for line maintenance and safety. The overhead insulated cable is prepared by extruding an inner shielding layer and a weather-proof cross-linked polyethylene or black high-strength polyvinyl chloride insulating layer and a shielding layer outside a compressed copper conductor and an aluminum conductor, has a simple structure, is safe and reliable, has excellent mechanical physical property and electrical property, is excellent in tracking resistance, creeping discharge resistance and atmosphere resistance, has small laying clearance, saves line corridor and line voltage and reduces line accidents compared with a bare conductor. The current insulated cable has mature manufacturing process and lower cost.
The drainage wire is a jumper wire and is a section of arc-shaped wire, and two ends of the drainage wire are connected to wires on two sides of the tension pole tower; and when the current reaches the tension rod through the lead, the tension insulator and the iron tower are skipped through the jumper wire, and power transmission is continued from the other party.
At present, an overhead insulated cable is adopted for insulating transformation of the 10kV overhead transmission line, so that the ground faults caused by trees, bamboo and other foreign matters are reduced, and the reliability of the overhead transmission line is improved. For the overhead transmission line with the voltage class of 110kV and above, the requirement on the long and insulating strength is high, the whole line insulation transformation is not suitable, but the partial insulation transformation can be performed aiming at the weak links of the line, such as the drainage line, so that the insulation performance is improved, and the occurrence of bird damage faults is reduced.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide an overhead transmission line insulation drainage wire based on an overhead insulated cable and a preparation method thereof, and to provide an insulation drainage wire suitable for 110kV and 220kV transmission lines and a transformation method based on 10kV and 35kV overhead insulated cables for transformation so as to improve the insulation level of the drainage wire and a pole tower and effectively avoid single-phase grounding faults caused by bird dropper flashover.
The invention adopts the following technical scheme.
An overhead transmission line insulation drainage wire based on an overhead insulated cable comprises the overhead insulated cable, a cold-shrink terminal head, a strain clamp, a heat-shrink tube and sealant;
mounting cold shrink terminal heads at positions of the overhead insulated cable, which are close to two ends by a certain mounting distance, and sealing two ends of the cold shrink terminal heads mounted on the overhead insulated cable by using sealant;
the insulating layers are stripped from the two ends of the overhead insulated cable, the exposed conductors of the overhead insulated cable are connected with the strain clamp in a crimping way, the contact part of the strain clamp and the insulating layer of the overhead insulated cable is sealed by using sealant, and then the contact part is coated by using a heat shrinkage tube.
Further, according to overhead transmission lines of different voltage classes, the nominal cross-sectional area of the conductor and the thickness of the insulating layer of the proper overhead insulated cable are selected.
Further, the nominal cross-sectional area of the conductor of the overhead insulated cable is 10% -15% greater than the nominal cross-sectional area of the drain wire of the overhead transmission line.
Further, the thickness of the insulating layer of the overhead insulating cable adopted by the insulating drainage wire of the 110kV overhead transmission line is not less than 3.5mm, and the thickness of the insulating layer of the overhead insulating cable adopted by the insulating drainage wire of the 220kV overhead transmission line is not less than 8.0mm.
Further, the length of the overhead insulated cable is selected based on the tower type and cross arm width.
A method for preparing an overhead transmission line insulation drainage wire based on an overhead insulated cable, the method comprising the steps of:
(1) For power transmission lines with different voltage levels, selecting a conductor nominal section area and an insulating layer thickness of a proper overhead insulating cable, and selecting a proper length of the overhead insulating cable according to the width of a tower-type cross arm of a tower; then cleaning the surface of the overhead insulated cable;
(2) Mounting cold shrink terminals at positions close to two ends of the overhead insulated cable by a certain mounting distance, so that the cold shrink terminals are completely attached to the surface of an insulating layer of the overhead insulated cable;
(3) Sealing the two ends of the cold-shrink terminal head, which are arranged on the overhead insulated cable, by using sealant;
(4) Stripping insulating layers at two ends of the overhead insulated cable for a distance, and sleeving the thermal shrinkage sleeve on the overhead insulated cable;
(5) And crimping the conductor of the exposed overhead insulated cable and the strain clamp, sealing the contact part of the overhead insulated cable and the strain clamp by using sealant, and coating by using a heat shrinkage tube.
Further, in the step (2), the installation distance between the initial installation position of the cold shrink terminal and the two ends of the overhead insulated cable is more than 35mm.
Further, in the step (2), cold-shrink terminals with proper lengths are selected according to different voltage grades, the length of the cold-shrink terminal of the 110kV insulation drainage wire umbrella is not less than 800mm, the length of the cold-shrink terminal of the 220kV insulation drainage wire is not less than 1200mm, and the cold-shrink terminal with proper sizes is selected according to the sectional areas of different overhead insulated cables.
Further, in the step (4), the stripping distance of the insulation layers at the two ends of the overhead insulated cable is 15mm.
In the step (5), the contact part between the insulating layer and the strain clamp of the overhead insulated cable is sealed by using sealant, and then the contact part is completely covered by sleeving the heat shrinkage tube at two ends of the insulating layer and the strain clamp and shrinking the heat shrinkage tube by heating.
The invention has the beneficial effects that compared with the prior art: according to the invention, the existing 10kV and 35kV overhead insulated cables are utilized to carry out insulation transformation on the 110kV and 220kV drainage lines, the original overhead line structure is not changed, the original drainage lines are only required to be detached, the insulated drainage lines are installed, the implementation is convenient, and the insulation performance on the ground wire and the iron tower is good. The insulating drainage wire transformation method is simple, extremely low in transformation cost, convenient to popularize and implement and good in economic benefit. The insulating drainage wire is simple in structure, convenient to install and detach and free of damage to the insulating drainage wire in the process of installation and detachment.
The cold-shrink terminal at the end part of the invention can homogenize electric field distortion generated when the insulating material is contacted with metal, and can increase the creepage distance of the surface of the insulating layer to prevent flashover along the insulating surface when the surface of the insulating layer is polluted.
Drawings
Fig. 1 is a schematic diagram of an overhead transmission line insulation drainage wire structure based on an overhead insulated cable;
FIG. 2 is a reference diagram of an overhead transmission line insulation drainage wire usage state based on an overhead insulated cable;
fig. 3 is a flow chart of a method for preparing an overhead transmission line insulation drainage wire based on an overhead insulated cable.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present invention and are not intended to limit the scope of protection of the present application.
As shown in fig. 1, the overhead transmission line insulation drainage wire based on the overhead insulated cable comprises an overhead insulated cable 1,2 sets of cold-shrink terminals 2,2 sets of strain clamps 3, a plurality of heat shrink tubes 4 and a plurality of sealant 5. And cold shrink terminal heads 2 are arranged at the end parts of the aerial insulated cable 1 close to the two ends, and sealing treatment is carried out through a sealant 5. The two ends of the overhead insulated cable 1 are stripped of insulating layers, the exposed conductors of the overhead insulated cable 1 are connected with the strain clamp 3 in a crimping mode, the contact part of the strain clamp 3 and the insulating layer of the overhead insulated cable 1 is sealed by using sealant 5, and then the contact part is coated by using a heat shrinkage tube 4.
As shown in fig. 2, the reference diagram of the use state of the insulated drainage wire of the overhead transmission line based on the overhead insulated cable is shown, and the wires at two ends of the insulated drainage wire connecting rod tower are connected through the strain clamp 3.
As shown in fig. 3, the preparation method of an insulated drainage wire of an overhead power transmission line based on an overhead insulated cable, after determining the installation position, sleeving the cold shrink terminal on the outer side of the overhead insulated cable, sealing the end part by using sealant, stripping insulating layers at two ends of the overhead insulated cable by using wire stripper, crimping the exposed wire part to a strain clamp, sealing the contact part of the strain clamp and the insulating layer by using sealant, and then coating by using a heat shrink tube, specifically comprises the following steps:
(1) For power transmission lines with different voltage levels, selecting a proper conductor nominal section area and insulation layer thickness of the overhead insulated cable, and selecting a proper length of the overhead insulated cable 1 according to the width of a tower-type cross arm of the tower; then cleaning the surface of the overhead insulated cable 1 to ensure that the surface of the overhead insulated cable 1 is clean and smooth;
and selecting a proper nominal sectional area of the inner conductor of the overhead insulated cable 1 according to the nominal sectional areas of the drainage lines of the power transmission lines with different voltages, wherein the nominal sectional area of the conductor of the overhead insulated cable 1 is 10-15% larger than the nominal sectional area of the drainage line of the power transmission line.
The thickness of the insulating layer of the overhead insulating wire adopted by the insulating drainage wire of the 110kV overhead transmission line is more than or equal to 3.5mm, and the thickness of the insulating layer of the overhead insulating wire adopted by the insulating drainage wire of the 220kV overhead transmission line is more than or equal to 8.0mm.
The length of the overhead insulated cable 1 should be selected according to the tower type and the cross arm width, and the length of the overhead insulated cable 1 should be increased by a certain margin.
(2) The cold shrinkage terminal 2 is installed at the end part close to the two ends of the overhead insulated cable 1, and the cold shrinkage terminal is installed according to the use instruction of the cold shrinkage terminal when the cold shrinkage terminal is installed, so that the cold shrinkage terminal 2 is guaranteed to be completely attached to the surface of an insulating layer of the overhead insulated cable 1, and the condition that an air gap is bulged is avoided.
The initial installation position of the cold shrink terminal 2 should be greater than about 35mm from the two ends of the overhead insulated cable 1, leaving a distance for installing the strain clamp 3 at the two ends.
The cold-shrink terminal head 2 with proper length should be selected according to different voltage grades, the length of the cold-shrink terminal head 2 of the 110kV insulation drainage wire umbrella is not less than 800mm, the length of the cold-shrink terminal head 2 of the 220kV insulation drainage wire is not less than 1200mm, and the cold-shrink terminal head 2 with proper size is selected according to the sectional area of different overhead insulated cables 1.
(3) Sealing the two ends of the cold shrink terminal 2 arranged on the overhead insulated cable 1 by using sealant 5;
(4) Stripping the insulating layers at the two ends of the aerial insulated cable 1 by using a wire stripper to 15mm, and sleeving a heat shrinkage tube 4 with the length of about 4mm on the aerial insulated cable; when the insulating layer is stripped, the conductor is ensured to be complete, and damage is avoided;
(5) The exposed conductor of the overhead insulated cable 1 is subjected to hydraulic forming by using a strain clamp 3, and the hydraulic process should ensure that the conductor of the overhead insulated cable is tightly pressed with the strain clamp; sealing the contact part of the overhead insulated cable and the strain clamp by using sealant, and coating by using a heat shrinkage tube; specifically, firstly, the contact part between the insulating layer of the overhead insulated cable 1 and the strain clamp 3 is sealed by using the sealant 5, and then the heat shrinkage tube 4 is sleeved at two ends of the insulating layer and the strain clamp 3, and the heat shrinkage tube is shrunk by heating, so that the contact part is completely coated.
Compared with the prior art, the invention has the beneficial effects that the current 10kV and 35kV overhead insulated cable is utilized to carry out insulation transformation on the 110kV and 220kV drainage wire, the structure of the original overhead line is not changed, the original drainage wire is only required to be dismounted, the insulated drainage wire is installed, the implementation is convenient, and the insulation performance on the ground wire and the iron tower is good. The insulating drainage wire transformation method is simple, extremely low in transformation cost, convenient to popularize and implement and good in economic benefit. The insulating drainage wire is simple in structure, convenient to install and detach and free of damage to the insulating drainage wire in the process of installation and detachment.
The cold-shrink terminal at the end part of the invention can homogenize electric field distortion generated when the insulating material is contacted with metal, and can increase the creepage distance of the surface of the insulating layer to prevent flashover along the insulating surface when the surface of the insulating layer is polluted.
While the applicant has described and illustrated the embodiments of the present invention in detail with reference to the drawings, it should be understood by those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not to limit the scope of the present invention, but any improvements or modifications based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. The overhead transmission line insulation drainage wire based on the overhead insulated cable is characterized by comprising the overhead insulated cable (1), a cold-shrink terminal head (2), a strain clamp (3), a heat shrinkage tube (4) and sealant (5);
cold shrinkage terminal heads (2) are arranged at positions, close to two ends, of the overhead insulated cable (1) by a certain installation distance, and sealing treatment is carried out on two ends, mounted on the overhead insulated cable (1), of the cold shrinkage terminal heads (2) by using sealant (5);
the insulation layers are stripped from the two ends of the overhead insulated cable (1), a conductor of the exposed overhead insulated cable (1) is connected with the strain clamp (3) in a crimping way, the contact part of the strain clamp (3) and the insulation layer of the overhead insulated cable (1) is sealed by using sealant (5) firstly, and then is coated by using a heat shrinkage tube (4);
the overhead transmission line insulation drainage wire is transformed based on 10kV and 35kV overhead insulation cables;
the overhead transmission line insulation drainage wire is suitable for 110kV and 220kV transmission lines.
2. Overhead power transmission line insulation drainage wire based on overhead insulated cable according to claim 1, characterized in that the conductor nominal cross-section area and the insulation layer thickness of the appropriate overhead insulated cable are selected according to overhead power transmission lines of different voltage classes.
3. Overhead power transmission line insulation drainage wire based on overhead insulated cable according to claim 2, characterized in that the nominal cross-sectional area of the conductor of the overhead insulated cable (1) is 10-15% larger than the nominal cross-sectional area of the overhead power transmission line drainage wire.
4. The overhead transmission line insulation drainage wire based on the overhead transmission line insulation drainage wire according to claim 2, wherein the thickness of an insulation layer of an overhead insulation cable used for the overhead transmission line insulation drainage wire of 110kV is not less than 3.5mm, and the thickness of an insulation layer of an overhead insulation cable used for the overhead transmission line insulation drainage wire of 220kV is not less than 8.0mm.
5. Overhead power transmission line insulation drainage wire based on overhead insulated cables according to claim 1, characterized in that the length of the overhead insulated cable (1) is selected according to the tower type and cross arm width.
6. A method for preparing an overhead transmission line insulation drainage wire based on an overhead insulated cable, the overhead transmission line insulation drainage wire being the overhead transmission line insulation drainage wire based on an overhead insulated cable according to any one of claims 1 to 5, the method comprising the steps of:
(1) For power transmission lines with different voltage levels, selecting a conductor nominal section area and an insulating layer thickness of a proper overhead insulating cable, and selecting a proper length of the overhead insulating cable (1) according to the width of a tower-type cross arm of a tower; then cleaning the surface of the overhead insulated cable (1);
(2) Cold shrinkage terminal heads (2) are arranged at positions which are close to two ends of the overhead insulated cable (1) at a certain installation distance, so that the cold shrinkage terminal heads (2) are completely attached to the surface of an insulating layer of the overhead insulated cable (1);
(3) Sealing the two ends of the cold shrink terminal (2) arranged on the overhead insulated cable (1) by using sealant (5);
(4) Stripping insulating layers at two ends of an overhead insulated cable (1) for a certain distance, and sleeving a heat shrinkage pipe (4) on the overhead insulated cable;
(5) The conductor of the exposed overhead insulated cable (1) is crimped with the strain clamp (3), the contact part of the overhead insulated cable and the strain clamp is sealed by using sealant, and then the contact part is coated by using a heat shrinkage tube.
7. The method for preparing an overhead transmission line insulation drainage wire based on an overhead insulated cable according to claim 6, wherein,
in the step (2), the initial installation distance between the initial installation position of the cold shrink terminal (2) and the two ends of the overhead insulated cable (1) is more than 35mm.
8. The method for preparing an overhead transmission line insulation drainage wire based on an overhead insulated cable according to claim 6, wherein,
in the step (2), the cold-shrink terminal head (2) with proper length is selected according to different voltage grades, the length of the cold-shrink terminal head (2) of the 110kV insulation drainage wire umbrella is not less than 800mm, the length of the cold-shrink terminal head (2) of the 220kV insulation drainage wire is not less than 1200mm, and the cold-shrink terminal head (2) with proper size is selected according to the sectional areas of different overhead insulated cables (1).
9. The method for preparing an overhead transmission line insulation drainage wire based on an overhead insulated cable according to claim 6, wherein,
in the step (4), the stripping distance of the insulating layers at the two ends of the overhead insulated cable (1) is 15mm.
10. The method for preparing an overhead transmission line insulation drainage wire based on an overhead insulated cable according to claim 6, wherein,
in the step (5), firstly, the contact part of the insulating layer of the overhead insulated cable (1) and the strain clamp (3) is sealed by using the sealant (5), and then the heat shrinkage tube (4) is sleeved at two ends of the insulating layer and the strain clamp (3), and the contact part is completely covered by shrinking the heat shrinkage tube through heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210247434.6A CN114566910B (en) | 2022-03-14 | 2022-03-14 | Overhead transmission line insulation drainage wire based on overhead insulated cable and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210247434.6A CN114566910B (en) | 2022-03-14 | 2022-03-14 | Overhead transmission line insulation drainage wire based on overhead insulated cable and preparation method |
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| Publication Number | Publication Date |
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| CN114566910A CN114566910A (en) | 2022-05-31 |
| CN114566910B true CN114566910B (en) | 2024-03-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2413996A1 (en) * | 2002-12-27 | 2004-06-27 | Peter Andrew Stabins | Overhead powerline suspension system |
| CN201369541Y (en) * | 2009-03-18 | 2009-12-23 | 深圳市深博新材料股份有限公司 | Outdoor connecting terminal of shrinking type high-tension cables |
| CN106410437A (en) * | 2016-09-29 | 2017-02-15 | 国网山东省电力公司烟台供电公司 | Connecting apparatus and mounting method for 110kV outdoor cable terminal |
| CN106451226A (en) * | 2016-12-23 | 2017-02-22 | 四川省达州钢铁集团有限责任公司 | Processing method of cracking cable |
| CN111630741A (en) * | 2017-12-04 | 2020-09-04 | Axpo电力公司 | Transmission line conductor bridging device and application in method for modifying or manufacturing overhead line tower |
-
2022
- 2022-03-14 CN CN202210247434.6A patent/CN114566910B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2413996A1 (en) * | 2002-12-27 | 2004-06-27 | Peter Andrew Stabins | Overhead powerline suspension system |
| CN201369541Y (en) * | 2009-03-18 | 2009-12-23 | 深圳市深博新材料股份有限公司 | Outdoor connecting terminal of shrinking type high-tension cables |
| CN106410437A (en) * | 2016-09-29 | 2017-02-15 | 国网山东省电力公司烟台供电公司 | Connecting apparatus and mounting method for 110kV outdoor cable terminal |
| CN106451226A (en) * | 2016-12-23 | 2017-02-22 | 四川省达州钢铁集团有限责任公司 | Processing method of cracking cable |
| CN111630741A (en) * | 2017-12-04 | 2020-09-04 | Axpo电力公司 | Transmission line conductor bridging device and application in method for modifying or manufacturing overhead line tower |
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| Publication number | Publication date |
|---|---|
| CN114566910A (en) | 2022-05-31 |
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