CN114566910A - Overhead transmission line insulating drainage wire based on overhead insulated cable and preparation method thereof - Google Patents
Overhead transmission line insulating drainage wire based on overhead insulated cable and preparation method thereof Download PDFInfo
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- CN114566910A CN114566910A CN202210247434.6A CN202210247434A CN114566910A CN 114566910 A CN114566910 A CN 114566910A CN 202210247434 A CN202210247434 A CN 202210247434A CN 114566910 A CN114566910 A CN 114566910A
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- 238000009413 insulation Methods 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
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- 241000209128 Bambusa Species 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
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- Suspension Of Electric Lines Or Cables (AREA)
- Cable Accessories (AREA)
Abstract
The invention discloses an overhead transmission line insulating drainage wire based on an overhead insulated cable and a preparation method thereof, wherein the overhead transmission line insulating drainage wire comprises an overhead insulated cable, a cold-shrinkage terminal, a strain clamp, a heat-shrinkable tube and sealant; the cold-shrink terminal is sleeved outside the overhead insulated cable after the installation position is determined, 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 conductor part is connected with a strain clamp in a pressing mode, the strain clamp is sealed by using the sealant at the contact part of the strain clamp and the insulating layer, and then a heat-shrinkable tube is used for covering. The invention utilizes the existing 10kV or 35kV overhead insulated cable to carry out insulation transformation on the drainage wire of 110kV or 220kV, does not change the structure of the original overhead line, only needs to dismount the original drainage wire and mount the insulated drainage wire, is convenient to implement and has good insulating property for the ground wire and the iron tower.
Description
Technical Field
The invention relates to power transmission line equipment, in particular to an insulated drainage wire of an overhead power transmission line based on an overhead insulated cable and a preparation method of the insulated drainage wire.
Background
In recent years, with the change of ecological environment, the activity area of birds is expanded, the activity frequency of birds is increased, and bird accidents are caused. Even if various bird prevention measures are adopted, the occurrence of bird damage accidents still cannot be avoided. The occurrence of bird damage trip accidents of the power transmission line directly influences the power quality and the reliability of power consumers.
The existing control measures aiming at bird trouble at present comprise: bird droppings in long strings are blocked by bird pricks, bird baffles, bird droppings insulators and the like; the latter is the flashover of the surface caused by bird droppings attaching to the surface of the insulator and in a humid environment, is essentially a special form of pollution flashover fault of the insulator, and can prevent flashover by adopting an antifouling insulator or a composite insulator besides a device for preventing the bird droppings from falling. Although the existing bird prevention measures reduce flashover between a wire and a cross arm and insulator surface flashover faults caused by bird droppings, the flashover between a ground wire and a jumper wire caused by the movement of a bird perching point to the outer side of a tower can also occur because the horizontal plane of a part of strain or a corner tower is not parallel to the trend of the wire, a wire picking cross arm cannot be parallel to the trend of the wire, the wire picking cross arm on one side is higher and closer to the ground wire, the air gap is reduced, the bird droppings are discharged to easily cause single-phase grounding of the line, and the line is tripped. The main reason for the fault is that the jumper angle steel and the section of the drainage wire are not coated by an insulating sheath, so that the jumper angle steel and the section of the drainage wire become bird damage prevention blind spots and bird droppings are caused to flashover. In order to reduce bird droppings flashover, the drainage wire needs to be subjected to insulation transformation.
The overhead insulated cable product is a novel series product for the overhead transmission line to transmit electric energy, is preferable for the construction and reconstruction of a 10kV transmission engineering line of a power grid, and is a series product which is most suitable for line maintenance and safety. The overhead insulated cable is prepared by extruding an inner shielding layer, a weather-resistant cross-linked polyethylene or black high polyvinyl chloride insulating layer and a shielding layer outside a compressed copper conductor and an aluminum conductor, has simple structure, safety and reliability, simultaneously has excellent mechanical and physical properties and electrical properties, is tracking-resistant, creeping-discharge-resistant and excellent in atmospheric resistance, and compared with a bare conductor, has small laying clearance, saves a line corridor, reduces line voltage and reduces line accidents. The existing insulated cable has mature manufacturing process and lower cost.
The drainage wire is a jumper wire and is an arc-shaped wire, and two ends of the drainage wire are connected with the wires on two sides of the strain tower; when the current reaches the tension-resistant rod through the conducting wire, the tension-resistant insulator and the iron tower are skipped through the jumper wire, and the power transmission is continued from the other side.
At present, 10kV overhead transmission lines are subjected to insulation transformation by adopting overhead insulated cables, so that the ground faults caused by trees, bamboos and other foreign matters are reduced, and the reliability of the overhead transmission lines is improved. The requirement on the length and the insulating strength of the overhead transmission line with the voltage level of 110kV or above is high, the whole line insulation transformation is not suitable, but the local insulation transformation can be carried out on weak links of the line such as a drainage wire, so that the insulation performance is improved, and the bird damage fault is reduced.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide an insulated drainage wire of an overhead transmission line based on an overhead insulated cable and a preparation method thereof, wherein the insulated drainage wire is modified based on 10kV and 35kV overhead insulated cables, and the insulated drainage wire suitable for 110kV and 220kV transmission lines and the modification method thereof are provided, so that the insulation level of the drainage wire and a tower is improved, and the single-phase grounding fault caused by bird droppings flashover can be effectively avoided.
The invention adopts the following technical scheme.
An overhead transmission line insulating drainage wire based on an overhead insulated cable comprises the overhead insulated cable, a cold-shrinkage terminal, a strain clamp, a heat-shrinkable tube and sealant;
mounting cold-shrink terminal heads at positions of the overhead insulated cable close to the two ends by a certain mounting distance, and sealing the two ends of the cold-shrink terminal heads mounted on the overhead insulated cable by using sealant;
the insulating layers are stripped at two ends of the overhead insulated cable, the conductor of the exposed overhead insulated cable is connected with the strain clamp in a compression joint mode, the contact part of the strain clamp and the insulating layer of the overhead insulated cable is sealed by sealant firstly, and then the strain clamp and the insulating layer of the overhead insulated cable are coated by the heat-shrinkable tube.
Further, according to overhead transmission lines of different voltage grades, the nominal cross-sectional area of the conductor and the thickness of the insulating layer of the appropriate overhead insulated cable are selected.
Furthermore, the nominal sectional area of the conductor of the overhead insulated cable is 10-15% larger than that of the drainage wire of the overhead transmission line.
Further, the thickness of the insulating layer of the overhead insulated cable adopted by the 110kV overhead transmission line insulated drainage wire is not less than 3.5mm, and the thickness of the insulating layer of the overhead insulated cable adopted by the 220kV overhead transmission line insulated drainage wire is not less than 8.0 mm.
And further, selecting the length of the overhead insulated cable according to the tower type and the width of the cross arm.
A preparation method of an insulated drainage wire of an overhead transmission line based on an overhead insulated cable comprises the following steps:
(1) selecting a conductor nominal cross section and an insulation layer thickness of a proper overhead insulated cable for the power transmission lines with different voltage grades, and selecting a proper length of the overhead insulated cable according to the width of the tower-type cross arm of the tower; then cleaning the surface of the overhead insulated cable;
(2) mounting cold-shrink terminal heads at positions close to two ends of the overhead insulated cable by a certain mounting distance, so that the cold-shrink terminal heads are completely attached to the surface of the insulating layer of the overhead insulated cable;
(3) sealing 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 certain distance, and sleeving a heat-shrinkable tube on the overhead insulated cable;
(5) and (3) 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 then coating by using a heat-shrinkable tube.
Further, in the step (2), the installation distance from the initial installation position of the cold-shrink terminal to the two ends of the overhead insulated cable is more than 35 mm.
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 insulating drainage wire umbrella is not less than 800mm, the length of the cold-shrink terminal of the 220kV insulating drainage wire umbrella is not less than 1200mm, and the cold-shrink terminals with proper sizes are selected according to different sectional areas of the overhead insulated cables.
Further, in the step (4), the stripping distance of the insulating layers at the two ends of the overhead insulated cable is 15 mm.
Further, in the step (5), the contact part of the insulating layer of the overhead insulated cable and the strain clamp is sealed by using a sealant, then the heat-shrinkable tube is sleeved at two ends of the insulating layer and the strain clamp, and the contact part is completely coated by shrinking the heat-shrinkable tube through heating.
Compared with the prior art, the invention has the beneficial effects that: the invention utilizes the existing 10kV and 35kV overhead insulated cables to carry out insulation transformation on the drainage wires of 110kV and 220kV, does not change the structure of the original overhead line, only needs to dismount the original drainage wires and mount the insulated drainage wires, is convenient to implement and has good insulating property for ground wires and iron towers. The transformation method of the insulated drainage wire 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 installation and detachment process.
The cold-shrink terminal at the end part of the invention can homogenize the electric field distortion generated when the insulating material is contacted with metal on one hand, and can increase the creepage distance on the surface of the insulating layer on the other hand, thereby preventing flashover along the insulating surface when the surface of the insulating layer is polluted.
Drawings
FIG. 1 is a schematic structural diagram of an insulated drainage wire of an overhead transmission line based on an overhead insulated cable;
FIG. 2 is a reference diagram of the use state of an insulated drainage wire of an overhead transmission line based on an overhead insulated cable;
fig. 3 is a flow chart of a preparation method of an insulated drainage wire of an overhead transmission line 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 illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
As shown in fig. 1, the insulated drainage wire of the overhead transmission line 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-shrinkable tubes 4 and a plurality of sealants 5. And cold-shrink terminals 2 are arranged at the end parts of the aerial insulated cable 1 close to the two ends, and are sealed by sealant 5. The insulating layers are stripped at two ends of the overhead insulated cable 1, the conductor of the exposed overhead insulated cable 1 is connected with the strain clamp 3 in a compression joint mode, the strain clamp 3 is sealed by the sealant 5 at the position, in contact with the insulating layer of the overhead insulated cable 1, and then the strain clamp is coated by the heat shrink tube 4.
As shown in fig. 2, which is a reference diagram of the use state of the insulated drainage wire of the overhead transmission line based on the overhead insulated cable, the insulated drainage wire is connected with the wires at two ends of the tower through the strain clamp 3.
As shown in fig. 3, the method for manufacturing the insulated drainage wire of the overhead transmission line based on the overhead insulated cable specifically includes the steps of determining the installation position of the cold-shrink terminal, sleeving the cold-shrink terminal on the outer side of the overhead insulated cable, sealing the end by using sealant, stripping the insulating layers at two ends of the overhead insulated cable by using wire strippers, connecting the exposed wire portion to a strain clamp, sealing the strain clamp by using the sealant at the contact position of the strain clamp and the insulating layer, and then coating the strain clamp by using a heat-shrinkable tube:
(1) selecting a conductor nominal cross section and an insulation layer thickness of a proper overhead insulated cable for the power transmission lines with different voltage grades, and selecting a proper length of the overhead insulated cable 1 according to the width of the 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 flat;
and selecting a proper nominal sectional area of the conductor in the overhead insulated cable 1 according to the nominal sectional areas of the drainage wires of the power transmission lines with different voltages, wherein the nominal sectional area of the conductor in the overhead insulated cable 1 is 10-15% larger than the nominal sectional area of the drainage wire of the power transmission line.
The thickness of the insulating layer of the overhead insulated 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 insulated wire adopted by the insulating drainage wire of the 220kV overhead transmission line is more than or equal to 8.0 mm.
The length of the overhead insulated cable 1 is selected according to the tower type and the width of the cross arm, and the length of the overhead insulated cable 1 is increased by a certain margin.
(2) The cold-shrink terminal 2 is installed at the end parts close to the two ends of the overhead insulated cable 1, and the cold-shrink terminal is installed according to the use specification of the cold-shrink terminal when being installed, so that the surfaces of the insulation layers of the cold-shrink terminal 2 and the overhead insulated cable 1 are completely attached, and the situation that an air gap is expanded is avoided.
The distance between the initial installation position of the cold-shrinkage terminal 2 and the two ends of the overhead insulated cable 1 is about 35mm, and the distance is reserved for installing the strain clamp 3 at the two ends.
The cold-shrink terminal 2 with proper length is selected according to different voltage classes, the length of the cold-shrink terminal 2 of the 110kV insulating drainage wire umbrella is not less than 800mm, the length of the cold-shrink terminal 2 of the 220kV insulating drainage wire umbrella is not less than 1200mm, and the cold-shrink terminal 2 with proper size is selected according to the sectional areas of different overhead insulated cables 1.
(3) Sealing the two ends of the cold-shrink terminal 2, which are arranged on the overhead insulated cable 1, by using a sealant 5;
(4) stripping insulating layers at two ends of the overhead insulated cable 1 by using a wire stripper for about 15mm, and sleeving a heat shrinkable tube 4 with the length of about 4mm on the overhead insulated cable; when the insulating layer is stripped, attention should be paid to ensure the integrity of the conductor so as to avoid damage;
(5) performing hydraulic forming on the conductor of the exposed overhead insulated cable 1 by using a strain clamp 3, wherein the conductor of the overhead insulated cable and the strain clamp are tightly pressed in a hydraulic process; sealing the contact part of the overhead insulated cable and the strain clamp by using sealant, and then coating by using a heat-shrinkable tube; specifically, 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, then the heat-shrinkable tube 4 is sleeved at two ends of the insulating layer and the strain clamp 3, and the heat-shrinkable tube is shrunk by heating to completely coat the contact part.
Compared with the prior art, the invention has the advantages that the invention carries out insulation transformation on the drainage wire of 110kV and 220kV by utilizing the existing 10kV and 35kV overhead insulated cables, does not change the structure of the original overhead line, only needs to dismount the original drainage wire, installs the insulation drainage wire, is convenient to implement and has good insulation performance for the ground wire and the iron tower. The transformation method of the insulated drainage wire is simple, extremely low in transformation cost, convenient to popularize and implement and good in economic benefit. The insulated drainage wire is simple in structure, convenient to install and detach and free of damage to the insulated drainage wire in the installation and detachment process.
The cold-shrink terminal at the end part of the invention can homogenize the electric field distortion generated when the insulating material is contacted with metal on one hand, and can increase the creepage distance on the surface of the insulating layer on the other hand, thereby preventing flashover along the insulating surface when the surface of the insulating layer is polluted.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely 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 for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. An overhead transmission line insulating drainage wire based on an overhead insulated cable is characterized by comprising an overhead insulated cable (1), a cold-shrinkage terminal (2), a strain clamp (3), a heat-shrinkable tube (4) and sealant (5);
mounting cold-shrink terminal heads (2) at positions of the overhead insulated cable (1) close to the two ends by a certain mounting distance, and sealing the two ends of the cold-shrink terminal heads (2) mounted on the overhead insulated cable (1) by using sealant (5);
the insulating layers are stripped at two ends of the overhead insulated cable (1), the conductor of the exposed overhead insulated cable (1) is connected with the strain clamp (3) in a compression joint mode, the contact part of the strain clamp (3) and the insulating layer of the overhead insulated cable (1) is sealed by the sealant (5) firstly, and then the insulating layer is coated by the heat-shrinkable tube (4).
2. The overhead insulated cable-based insulated drainage wire for an overhead transmission line according to claim 1, wherein the nominal cross-sectional area of the conductor and the thickness of the insulating layer of a suitable overhead insulated cable are selected according to the overhead transmission lines of different voltage classes.
3. The overhead insulated cable-based insulated drainage wire for an overhead transmission line 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 drainage wire for an overhead transmission line.
4. The overhead transmission line insulating drainage wire based on the overhead insulated cable according to claim 2, wherein the thickness of the insulating layer of the overhead insulated cable adopted by the 110kV overhead transmission line insulating drainage wire is not less than 3.5mm, and the thickness of the insulating layer of the overhead insulated cable adopted by the 220kV overhead transmission line insulating drainage wire is not less than 8.0 mm.
5. The overhead insulated cable-based insulated drainage wire for an overhead transmission line according to claim 1, characterized in that the length of the overhead insulated cable (1) is selected according to the tower type and the cross arm width.
6. A preparation method of an insulated drainage wire of an overhead transmission line based on an overhead insulated cable is characterized by comprising the following steps:
(1) selecting a conductor nominal cross section and an insulation layer thickness of a proper overhead insulated cable for the power transmission lines with different voltage grades, and selecting a proper length of the overhead insulated cable (1) according to the width of the tower-type cross arm; then cleaning the surface of the overhead insulated cable (1);
(2) mounting cold-shrink terminal heads (2) at positions close to two ends of the overhead insulated cable (1) by a certain mounting distance, and completely attaching the cold-shrink terminal heads (2) to the surface of the 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 a sealant (5);
(4) insulating layers at two ends of the overhead insulated cable (1) are stripped for a certain distance, and a heat-shrinkable tube (4) is sleeved on the overhead insulated cable;
(5) the conductor of the exposed overhead insulated cable (1) is connected with the strain clamp (3) in a compression joint mode, the contact position of the overhead insulated cable and the strain clamp is sealed by sealant, and then the overhead insulated cable and the strain clamp are coated by a heat-shrinkable tube.
7. The method for preparing the insulated drainage wire of the overhead transmission line based on the overhead insulated cable according to claim 6,
in the step (2), the 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 35 mm.
8. The method for preparing the insulated drainage wire of the overhead transmission line based on the overhead insulated cable according to claim 6,
in the step (2), cold-shrink terminals (2) with proper lengths are selected according to different voltage grades, the length of the cold-shrink terminals (2) of the 110kV insulating drainage wire umbrella is not less than 800mm, the length of the cold-shrink terminals (2) of the 220kV insulating drainage wire umbrella is not less than 1200mm, and the cold-shrink terminals (2) with proper sizes are selected according to the sectional areas of different overhead insulating cables (1).
9. The method for preparing the insulated drainage wire of the overhead transmission line based on the overhead insulated cable according to claim 6,
in the step (4), the stripping distance of the insulating layers at the two ends of the overhead insulated cable (1) is 15 mm.
10. The method for preparing the insulated drainage wire of the overhead transmission line based on the overhead insulated cable according to claim 6,
in the step (5), 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), then the heat-shrinkable tube (4) is sleeved at two ends of the insulating layer and the strain clamp (3), and the contact part is completely coated by heating to shrink the heat-shrinkable tube.
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 true CN114566910A (en) | 2022-05-31 |
| CN114566910B 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 |
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| CN114566910B (en) | 2024-03-01 |
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