CN108565771B - Device for replacing double-linkage double-hanging-point suspension string insulator of +/-800 kV extra-high voltage line - Google Patents
Device for replacing double-linkage double-hanging-point suspension string insulator of +/-800 kV extra-high voltage line Download PDFInfo
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- CN108565771B CN108565771B CN201810161281.7A CN201810161281A CN108565771B CN 108565771 B CN108565771 B CN 108565771B CN 201810161281 A CN201810161281 A CN 201810161281A CN 108565771 B CN108565771 B CN 108565771B
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- 239000012212 insulator Substances 0.000 title claims abstract description 47
- 239000000725 suspension Substances 0.000 title claims abstract description 14
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
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- 238000005336 cracking Methods 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-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
Abstract
The invention provides a +/-800 kV extra-high voltage line duplex double-hanging-point suspension string insulator replacing device, which comprises a bypass stress system for transferring stress of an insulator string to be replaced and an auxiliary hardware string tool for ensuring the working position of the hardware string; the bypass stress system comprises a large cutter clamp fixed at the position of the live wire yoke plate, a construction hanging hole plate fixed with the cross arm and a tensioning device arranged between the large cutter clamp and the construction hanging hole plate; the tensioning device comprises a first tensioning device and a second tensioning device which are identical in structure and symmetrically arranged; the first tensioning device comprises a hydraulic wire grip and a large-load mechanical wire grip fixedly connected with the lower end of a cylinder body of the hydraulic wire grip through an insulating pull rod; a groove is formed in the middle of the construction hole hanging plate, so that the insulator string to be replaced is avoided; the invention can replace the damaged insulator string in the shortest time, and is convenient, rapid and safe.
Description
Technical Field
The invention relates to the field of electric power overhaul, in particular to a +/-800 kV extra-high voltage line duplex double-hanging-point suspension string insulator replacing device, which is particularly suitable for +/-800 kV extra-high voltage eight-split conductor direct-current lines.
Background
The +/-800 kV ultrahigh-voltage direct-current transmission line is one of 12 key power transmission channels determined by the national atmospheric pollution prevention action plan, is an important gripper for deeply promoting the construction of the shanghai temple energy chemical industry base, and has important practical significance for promoting the development of the whole-flag economic society.
The high-capacity power system of the +/-800 kV ultra-high voltage transmission line plays a decisive role in the safety of the power grid when the power system is connected into the power grid, and once a power accident occurs, the power grid generates great fluctuation, oscillation and even cracking. Therefore, how to improve the power supply reliability and strengthen the operation and maintenance technology, and the live working technology is adopted to realize the uninterrupted maintenance and the uninterrupted continuous power supply is the problem which needs to be solved. The +/-800 kV composite insulator string is about 9.6-11 meters, an extra-high voltage electric field is formed from the insulator string to the surrounding space of the electrified lead, and workers can change the linear insulator string in the electric field in an electrified mode. And the task is safely finished with minimum personnel allocation, shortest emptying operation time and minimum labor intensity. Therefore, the hot-line work method needs to be scientific, simple, precise, reasonable in tool structure, light in weight, flexible and convenient to operate.
Disclosure of Invention
In order to solve the technical problems, the invention provides a +/-800 kV extra-high voltage line duplex double-hanging-point suspension string insulator replacing device which can replace a damaged insulator string in the fastest time and is convenient, rapid and safe.
In order to solve the technical problems, the invention adopts the following technical scheme:
a +/-800 kV extra-high voltage line duplex double-hanging-point suspension string insulator replacing device comprises a suspension chain insulator used for transferring an insulator to be replaced
A bypass stress system for stress of the substrings and an auxiliary hardware string tool for ensuring the working position of the hardware string; the bypass stress system comprises a large cutter clamp fixed at the position of the live wire yoke plate, a construction hanging hole plate fixed with the cross arm and a tensioning device arranged between the large cutter clamp and the construction hanging hole plate; the tensioning device comprises a first tensioning device and a second tensioning device which are identical in structure and symmetrically arranged; the first tensioning device comprises a hydraulic wire grip and a large-load mechanical wire grip fixedly connected with the lower end of a cylinder body of the hydraulic wire grip through an insulating pull rod; in order to avoid the extrusion between the insulator string to be replaced and the construction hanging hole plate, a groove is formed in the middle of the construction hanging hole plate, so that the insulator string to be replaced is avoided.
Further, the first tensioning device and the second tensioning device are suspended at the same position on the lower side of the heavy-load mechanical tightener
The angle measuring device is provided with an angle measuring rod in a hanging mode, and two end points of the angle measuring rod can rotate relatively to a large-load mechanical tightener of the first tensioning device and the second tensioning device at a certain angle; and a reference rod perpendicular to the high-load mechanical wire grip is fixedly arranged at the suspension point of the angle measuring rod of the second tensioning device.
Furthermore, the insulating pull rod is of a high-strength filling foam multilayer pipe structure.
Further, supplementary gold utensil cluster instrument cross-section is the n type, including set up in the support connecting rod in the middle with the symmetry set up in support connecting rod both ends and with support connecting rod integrated into one piece's connector structure.
Furthermore, the large knife clip is of a hook-shaped structure and comprises two separated inserting plates A, an inserting plate B and a straight side plate C, and the second step is that
The large-load mechanical tightener of a tensioning device is connected to the straight side plate C through a connector; the large-load mechanical tightener of the second tensioning device is connected to the inserting plate A through a connector; in order to work conveniently, the large knife clamp is provided with a notch at the position of the grading ring, and the grading ring is avoided.
The invention has the following technical effects:
(1) the +/-800 kV extra-high voltage eight-split conductor direct-current circuit is different from the conventional six-split conductor, the conductor is JL1/G2A-1250/100, and the requirements on mechanical strength, insulating property and electric resistance are different; the mechanical strength, the insulating property and the point resistance of the device can meet the circuit requirements;
(2) the traditional maintenance and replacement tool is only provided with a bypass stress system, after the bypass stress system is installed, because the bypass stress system deviates from the stress point of the original insulator string to be replaced, as shown in figure 4, the insulator strings 1 and 2 bear tension before replacement, the stress points are A and B and are symmetrical about a lead, after the bypass stress system 1 replaces the insulator string to be replaced, namely the insulator string 2, the stress points are transferred from the point B to the point C, at the moment, the stress points are A and C, because the stress points A and C are not symmetrical, included angles can be generated on lines at two sides due to non-uniform stress, in order to avoid the situation, as shown in figure 5, the bypass stress system is arranged into two symmetrical groups of tensioning devices, namely a first tensioning device and a second tensioning device, and because an angle measuring rod and a reference rod are arranged, the first tensioning device and the second tensioning device can be ensured to be completely equal in stress, at the moment, the stress of the insulator string to be replaced can be transferred to a bypass stress system without changing, so that the leads on the two sides are kept in the original shape, and no included angle is generated;
(3) because the bypass stress system is provided with two symmetrical tensioning devices, the stress of the original insulator string to be replaced is divided into two groups of tensioning devices, the stress is reduced, and the service life is prolonged;
(4) compared with the traditional insulator replacing mode, the method has the advantages that an auxiliary hardware string tool is added, a bypass stress system is tightened, the insulator string is loosened, the insulator string is directly picked and falls to the ground, the hardware string is generally overlong and overweight in an extra-high voltage double-hanging-point circuit, however, when the insulator string is picked off, the hardware string on the cross arm side is opened and is in a free hanging state, when a new insulator string is replaced, the hardware string is quite difficult to return to a working position, the auxiliary hardware string tool is arranged, and the whole replacing method is particularly convenient, namely the hardware string is always in the working position;
(5) when the bypass stressed system is in an initial installation state, a large margin is quickly tightened by the manual mechanical tightener, and when the bypass is stressed, the hydraulic tightener is used for tightening, so that the stroke of the hydraulic tightener can be shortened, the volume and the weight are reduced, the working time is shortened, the device is reasonable in structure, the method is convenient and efficient, and the working efficiency is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a bypass force system according to the present invention;
FIG. 2 is a schematic diagram of an auxiliary hardware string tool structure according to the present invention;
FIG. 3 is a schematic view of the present invention in use;
FIG. 4 is a schematic diagram of a conventional insulator string replacement;
FIG. 5 is a schematic representation of the insulator string replacement of the present invention;
FIG. 6 is a schematic view of the angle measuring rod and reference rod mounting structure.
In the drawings: 1-a hydraulic wire tightener; 2-insulating pull rod; 3-large load mechanical tightener; 4-an auxiliary hardware string tool; 4-1 supporting the connecting rod; 4-2 connector structure; 5-large knife clip; 6, constructing a hole hanging plate; 7-an angle measuring rod; 8-reference bar; 9-a groove; a-inserting plate A; b, inserting a board B; c-straight plate C; 10-insulator string 1; 11-insulator string 2; 12-traditional bypass force systems; 13-first tensioning means; 14-a second tensioning device; 15-conducting wire.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings.
As shown in figures 1-3, the invention relates to an extra-high voltage insulator duplex double-hanging-point suspension string replacement auxiliary device, which comprises a suspension string replacement auxiliary device
A bypass stress system for transferring stress of the insulator string to be replaced and an auxiliary hardware string tool for ensuring the working position of the hardware string; the bypass stress system comprises a large knife clip 5 fixed at the position of the live wire yoke plate, a construction hanging hole plate 6 fixed with the cross arm and a tensioning device arranged between the large knife clip 5 and the construction hanging hole plate 6; in order to include a first tensioning device 13 and a second tensioning device 14 which are identical in structure and are arranged symmetrically; the first tensioning device 13 comprises a hydraulic wire grip 1 and a large-load mechanical wire grip 3 fixedly connected with the lower end of a cylinder body of the hydraulic wire grip 1 through an insulating pull rod 2; in order to avoid the extrusion of the insulator string to be replaced and the construction hole hanging plate 6, a groove 9 is formed in the middle of the construction hole hanging plate 6, so that the insulator string to be replaced is avoided.
As shown in fig. 6, the high-load mechanical tightener of the first and second tightening devices 13 and 14
An angle measuring rod 7 is hung at the same position on the lower side of the bracket 3; and a reference rod 8 perpendicular to the high-load mechanical wire grip 3 is fixedly arranged at the suspension point of the angle measuring rod 7 of the second tensioning device 14.
The insulating pull rod 2 is of a high-strength filling foam multilayer pipe structure, is made of a patent product ZL 95245540.4' high-strength filling foam multilayer pipe, and has the functions of electrically isolating a live wire from an iron tower and lifting the live wire.
The section of the auxiliary hardware string tool 4 is n-shaped and comprises a support connecting rod 4-1 arranged in the middle and connector structures 4-2 which are symmetrically arranged at two ends of the support connecting rod 4-1 and are integrally formed with the support connecting rod 4-1.
The large knife clip 5 is of a hook-shaped structure and comprises two separated inserting plates A, B and a straight side plate C, and the first tensioning device is used for tensioning
The large-load mechanical tightener 3 of the device 13 is connected to the straight side plate C through a connector; the heavy-load mechanical tightener 3 of the second tensioning device 14 is connected to the inserting plate A through a connector; in order to work conveniently, the large knife clamp is provided with a notch at the position of the grading ring, and the grading ring is avoided.
The using method of the invention comprises the following steps:
a) the bypass stress system rises from the outer side of the insulator string to be replaced, is hung to a cross arm of an iron tower by a transmission insulating rope, connects a construction hanging hole plate to a cross arm connection point, and then anchors the large knife clip on a connecting plate with an electric lead; in order to work conveniently, a gap is formed in the large knife clamp at the position of the grading ring, so that the grading ring is clamped in the gap; a groove 9 is formed in the middle of the construction hole hanging plate 6, so that the insulator string to be replaced is avoided;
b) anchoring the auxiliary hardware string tool on the cross arm side extension plate;
c) the large-load mechanical tightener 3 of the first tensioning device 13 and the second tensioning device 14 is manually operated to quickly tighten a large residual force, then the hydraulic tightener 1 of the first tensioning device 13 and the second tensioning device 14 is used for fine adjustment until the angle measuring rod 7 is superposed with the reference rod 8, so that the first tensioning device 13 and the second tensioning device 14 are ensured to be stressed the same, the stress of an insulator string to be replaced can be completely replaced, and the leads 15 on two sides are ensured to be kept in the original state without generating an included angle;
d) after the bypass stress system is adjusted, the original tensile force borne by the insulator string to be replaced is transferred to the bypass stress system, and the insulator string to be replaced is loosened, so that the insulator string to be replaced can be detached and then the whole insulator string to be replaced is arranged on the ground;
e) and after the insulator string is replaced, adjusting the large-load mechanical tightener to loosen the bypass stress system and remove the bypass stress system and the auxiliary hardware string tool.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A +/-800 kV extra-high voltage line duplex double-hanging-point suspension string insulator replacing device is characterized by comprising a bypass stress system for transferring stress of an insulator string to be replaced and an auxiliary hardware string tool (4) for ensuring the working position of the hardware string; the bypass stress system comprises a large knife clip (5) fixed at the position of the live wire yoke plate, a construction hanging hole plate (6) fixed with the cross arm and a tensioning device arranged between the large knife clip (5) and the construction hanging hole plate (6); the tensioning device comprises a first tensioning device (13) and a second tensioning device (14) which are identical in structure and are symmetrically arranged; the first tensioning device (13) comprises a hydraulic wire grip (1) and a large-load mechanical wire grip (3) fixedly connected with the lower end of a cylinder body of the hydraulic wire grip (1) through an insulating pull rod (2); a groove (9) is formed in the middle of the construction hole hanging plate (6);
an angle measuring rod (7) is arranged at the same position on the lower side of the large-load mechanical wire grip (3) of the first tensioning device (13) and the second tensioning device (14) in a hanging manner; a reference rod (8) perpendicular to the high-load mechanical wire grip (3) is fixedly arranged at the suspension point of the angle measuring rod (7) of the second tensioning device (14);
the insulating pull rod (2) is of a high-strength filling foam multilayer pipe structure;
the auxiliary hardware tool string tool (4) is n-shaped in cross section and comprises a support connecting rod (4-1) arranged in the middle and connector structures (4-2) which are symmetrically arranged at two ends of the support connecting rod (4-1) and are integrally formed with the support connecting rod (4-1);
the big knife clip (5) is provided with a notch.
2. The +/-800 kV extra-high voltage line duplex double-hanging-point suspension string insulator replacing device is characterized in that the large cutter clamp (5) is of a hook-shaped structure and comprises two separated plug boards A and B and a straight side plate C, and the large-load mechanical tightener (3) of the first tightening device (13) is connected to the straight side plate C through a connector; and the heavy-load mechanical tightener (3) of the second tensioning device (14) is connected to the inserting plate A through a connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161281.7A CN108565771B (en) | 2018-02-27 | 2018-02-27 | Device for replacing double-linkage double-hanging-point suspension string insulator of +/-800 kV extra-high voltage line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161281.7A CN108565771B (en) | 2018-02-27 | 2018-02-27 | Device for replacing double-linkage double-hanging-point suspension string insulator of +/-800 kV extra-high voltage line |
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| Publication Number | Publication Date |
|---|---|
| CN108565771A CN108565771A (en) | 2018-09-21 |
| CN108565771B true CN108565771B (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810161281.7A Active CN108565771B (en) | 2018-02-27 | 2018-02-27 | Device for replacing double-linkage double-hanging-point suspension string insulator of +/-800 kV extra-high voltage line |
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| CN (1) | CN108565771B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000059936A (en) * | 1998-08-10 | 2000-02-25 | Chubu Electric Power Co Inc | Insulator replacing device for two-string strain- insulator apparatus |
| CN102636186A (en) * | 2012-04-10 | 2012-08-15 | 中国人民解放军海军航空工程学院 | Positioning and calibration device of angular position of three-axis turntable |
| JP2012161174A (en) * | 2011-02-01 | 2012-08-23 | Chugoku Electric Power Co Inc:The | Power line suspension device insulator chain lifting device |
| CN202474686U (en) * | 2012-02-24 | 2012-10-03 | 陕西秦川电力器材实业有限公司 | Electrified replacing device for horizontal tension-proof insulator of 1,000 kV |
| CN202513494U (en) * | 2012-02-24 | 2012-10-31 | 陕西秦川电力器材实业有限公司 | Electriferous replacing device of v-shaped single-string insulator used in 1000 kV ultra-high voltage transmission line |
| CN105932599A (en) * | 2016-06-17 | 2016-09-07 | 国网湖南省电力公司带电作业中心 | Tool set capable of replacing insulator chain of ultra-high-voltage transmission line under electrified state and use method for tool set |
| CN207884196U (en) * | 2018-02-27 | 2018-09-18 | 国家电网公司 | One kind ± 800kV extra high voltage line double-linkage double-hanging-point pendulous string isolators more changing device |
-
2018
- 2018-02-27 CN CN201810161281.7A patent/CN108565771B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000059936A (en) * | 1998-08-10 | 2000-02-25 | Chubu Electric Power Co Inc | Insulator replacing device for two-string strain- insulator apparatus |
| JP2012161174A (en) * | 2011-02-01 | 2012-08-23 | Chugoku Electric Power Co Inc:The | Power line suspension device insulator chain lifting device |
| CN202474686U (en) * | 2012-02-24 | 2012-10-03 | 陕西秦川电力器材实业有限公司 | Electrified replacing device for horizontal tension-proof insulator of 1,000 kV |
| CN202513494U (en) * | 2012-02-24 | 2012-10-31 | 陕西秦川电力器材实业有限公司 | Electriferous replacing device of v-shaped single-string insulator used in 1000 kV ultra-high voltage transmission line |
| CN102636186A (en) * | 2012-04-10 | 2012-08-15 | 中国人民解放军海军航空工程学院 | Positioning and calibration device of angular position of three-axis turntable |
| CN105932599A (en) * | 2016-06-17 | 2016-09-07 | 国网湖南省电力公司带电作业中心 | Tool set capable of replacing insulator chain of ultra-high-voltage transmission line under electrified state and use method for tool set |
| CN207884196U (en) * | 2018-02-27 | 2018-09-18 | 国家电网公司 | One kind ± 800kV extra high voltage line double-linkage double-hanging-point pendulous string isolators more changing device |
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| CN108565771A (en) | 2018-09-21 |
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