CN110943396A - Operation process for live access equipotential of power transmission line in river network area - Google Patents
Operation process for live access equipotential of power transmission line in river network area Download PDFInfo
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- 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
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Abstract
The invention discloses an operation process for entering and exiting equipotential of a power transmission line in a river network area in an electrified way, which comprises the steps of verifying the condition of a working site, checking tools and materials, verifying double names, arranging hanging points on a tower, making a transmission rope system, a transmission pulley block system, enabling an equipotential electrician to enter equipotential, eliminating the defect of the line, exiting the equipotential electrician to be equipotential, enabling the equipotential electrician to sit in a Chinese character 'shi' ladder and arranging the upper tools and the lower tools of the tower to descend the tower. The invention has the beneficial effects that: in the step A, reasonable and accurate data are conveniently provided for erection of a river network, normal operation of projects is guaranteed, in the step C, tools are convenient to take, the number of operators is increased, working efficiency is improved, in the step D, the pulley system is guaranteed to provide a sufficient labor-saving effect, operation burden of electricians is reduced, erection of wires is facilitated, in the steps A and E, the minimum combination gap is guaranteed to be 5.02 meters, the combination gap is enabled to meet live working conditions, and the operation space of users is guaranteed.
Description
Technical Field
The invention relates to an operation process, in particular to an operation process for electrified entrance and exit equipotential of a power transmission line in a river network area, and belongs to the technical field of erection of power transmission lines in the river network area.
Background
With the high-speed development of power grids in China, the scale of power construction is larger and larger, power transmission line equipment is huge, the terrains of power transmission channel corridors are more and more complex, the natural environments are more and more severe, the proportion of special lines needing to be specially patrolled to all lines is more and more, the difficulty of operation and inspection of the power transmission lines is large, and the quality requirement is high.
Although the existing operation process is widely applied, the problems still exist in the actual use process, one is that at present, channels and ditches in a river network mud and marsh area are numerous, lakes and fish ponds are numerous, compared with the common transmission line engineering, the river network area is difficult to traffic and high in electric power operation difficulty, and has higher requirements for live working of a transmission line, the other is that the live working of the transmission line is limited by geographical division of the river network area and bridges according to the characteristics of geology and topography of the river network area, roads are generally difficult to reach a tower position, the geology of the river network area is poor, the underground water level is high, the periphery of a tower foundation is relatively narrow, the third is that the live working of an overhead line relates to high-altitude working, needs to be matched with personnel on the ground and on the high altitude, and needs to be placed in a relatively flat place, tools used in the live working need to be protected from moisture and insulation, and insulation must be carried out on the near water or on the, the device can not contact with water, so that the live working of the power transmission line on the near water or water is limited or has potential safety hazard.
Disclosure of Invention
The invention aims to solve the problems and provide an operation process for the live-line access equipotential of the power transmission line in the river network area.
The invention realizes the purpose through the following technical scheme: an operation process for electrified access equipotential of a power transmission line in a river network area comprises the following steps:
step A: checking the working site condition, checking tools and materials, surveying and detecting the tools on site, putting the tools on a damp-proof tarpaulin, neatly putting the tools, comprehensively checking the appearance without leakage, cleaning the surfaces of a hard insulating tool and a new insulator by using a dry and clean towel, measuring the current temperature and humidity and wind speed by a ground electrician, supervising the appearance checking and testing of the tools and materials by the ground electrician by a working responsible person, and checking the connection condition of the electrician and an equipotential worker wearing shielding clothes on a tower by the working responsible person;
and B: checking the double names, performing a safety tool test, checking the double names of lines and the tower numbers, performing a safety tool impact test and inspection before tower climbing by a tower climbing person, and recording by a working responsible person;
and C: arranging hanging points on a tower, tying a transmission rope system, enabling an electrician to carry 3 backup protection ropes of 6 meters, climbing an insulating rope sleeve to the end part of a cross arm, tying a 6-meter extension rope, tying two extension ropes of 6 meters to the proper position of the end part of the cross arm, transmitting the other ends of the 2 extension ropes to the equipotential electrician from a horizontal plane below the cross arm, fixing the insulating rope sleeve at the proper position in the middle of the cross arm, climbing the tower to the tail part of the cross arm along with a second electrician on the tower by the insulating rope sleeve, tying the 6-meter extension rope on an equipotential electrician safety belt buckle by the second electrician on the tower, and fixing the insulating rope sleeve at the proper position of the tail part of the cross arm by the equipotential electrician;
step D: the system comprises a transmission pulley block system, a ground electrician, a pulley block system and a herringbone ladder, wherein the ground electrician arranges a circulating rope system on a tower foot, the transmission rope is placed in a tower foot pulley after the electrician on the tower beats a transmission rope hanging point, a transmission rope hook is tied, the pulley block system and the herringbone ladder are transmitted to the electrician on the tower, a first electrician on the tower transmits the pulley block system to a second electrician on the tower from a cross arm lower plane, the second electrician on the tower is rapidly transmitted to an equipotential electrician, the equipotential electrician hooks the pulley block hook on an insulating rope sleeve after receiving the pulley block, and the herringbone ladder and a 6-meter extension rope are hooked on the pulley block;
step E: the equipotential electrician enters the equipotential, two ground electricians are matched with the equipotential electrician to enter the equipotential, the equipotential electrician sits on a Chinese character 'shi' ladder, a report work responsible person applies for entering the equipotential, the equipotential is quickly entered after the consent of the work responsible person, a lead is grabbed at a position 0.5 m away from the lead, the inner side of the lead is quickly drilled between sub-leads, and the Chinese character 'shi' ladder is hooked on the lead;
step F: eliminating the defect of the line, namely, routing the equipotential to the defect position on the lead to eliminate the defect;
step G: the equipotential electrician goes out the equipotential, the equipotential electrician sits in the scholar ladder, report work person in charge, under the cooperation of two electricians on the ground, the equipotential electrician waits that the loose hand withdraws from the equipotential after the assembly pulley atress goes out, the equipotential arrives on the cross arm after, untie the assembly pulley, the scholar ladder, 6 meters extension rope, give the assembly pulley second electrician on the tower by plane transfer under the cross arm, second electrician on the tower gives first electrician on the tower rapidly, first electrician on the tower transfers the assembly pulley to cross arm outside hanging point department by plane transfer under the cross arm, the hook is on the transmission rope couple. Meanwhile, a second electrician on the tower puts the stringing screw rod into a small hard canvas barrel and hangs the stringing screw rod on a transfer rope hook, the base is put into a common canvas barrel, and a ground electrician transfers the hard canvas barrel, the common canvas barrel, the ladder shaped like a Chinese character 'shi' and the transfer rope system to the ground;
step H: the device is arranged on the tower, the first electrician on the tower carries the transmission rope to go down the tower, the second electrician on the tower carries 2 extension ropes with the length of 6 meters and 1 extension rope with the length of 4 meters, the insulating rope sleeve is arranged on the tail of the first electrician to go down the tower, and the equipotential electrician carries the insulating rope sleeve to be arranged on the tail of the second electrician to go down the tower.
Preferably, in order to provide reasonable and accurate data for erecting a river network and ensure normal operation of the project, in the step a, according to field survey data, the construction of the floating bridge is based on data L of a distance from a river bank to a tower measured by an unmanned aerial vehicle, the width D of the floating bridge (3 meters without special circumstances) and the number of buoys used, the area S of the floating bridge is L × D, handrails should be arranged on two sides of the floating bridge, the height of the floating bridge is 1.2 meters, the area of the live working operation platform is calculated according to the area needed by the tower root opening and the working, the area S1+ S2, the area S1 is L1 × L1, the area S2 is L1 × L2, the tower root opening is L1, the actual working use length of the L2 is determined, and the number of the buoys is determined according to the area of the live working operation platform.
Preferably, in order to facilitate taking of the tools and increase the number of operators, the work efficiency is improved, in the step C, 3 electrician horizontal stations are arranged on the tower, and the portable tool bag is carried by the electrician.
Preferably, in order to ensure that the pulley system can provide a sufficient labor-saving effect, reduce the operation burden of electricians, and facilitate the erection of the wires, in the step D, the insulating transmission rope system climbs the tower to the end of the cross arm, the second electrician on the tower takes out the first electrician transmission rope system, hooks on the insulating rope sleeve, and the pulley block hook hooks on the insulating rope sleeve.
Preferably, in order to ensure that the minimum combined gap is 5.02 meters, so that the combined gap meets the live-line operation conditions and the operation space of users is ensured, in the steps a and E, firstly, the combined gap is checked, the combined gap is the same as the combined gap of towers in a river network area communicated with experts in the national academy of electrical sciences, and the combined gap is checked according to a conventional checking mode under the condition that the humidity does not reach 80%, and the checking method is implemented on the towers 1 through AUTOCAD software: 1, drawing, namely simulating a hanging basket method or a Chinese character 'shi' ladder method for a tower window structure to meet the safety distance required by safety regulations.
The invention has the beneficial effects that: the operation process for live entry and exit of the transmission line in the river network area to equal potential is reasonable in design, in the step A, according to site survey data, the construction of a floating bridge is based on the distance data L from a river bank to a tower measured by an unmanned aerial vehicle, the width D (3 meters without special condition) of the floating bridge, the using number of floating bowls is calculated, the area S of the floating bridge is L multiplied by D, handrails are arranged on two sides of the floating bridge, the height is 1.2 meters, the area of a live working operation platform is calculated according to the area needed by the root of the tower and during operation, S is S1+ S2, S1 is L1 multiplied by L1, S2 is L1 multiplied by L2, the root of the L1 tower is opened, the actual using length of the L2 operation is determined according to the area of the live working operation platform, reasonable and accurate data are conveniently provided for the erection of the river network, the normal operation of the project is ensured, in the step C, 3 electrician horizontal stations are arranged on the tower, and portable tools are carried at equal, make things convenient for getting of instrument to take, thereby increase operating personnel's quantity and improve work efficiency, step D, insulating transmission rope system steps on the tower to the cross arm tip, second electrician takes out first electrician transmission rope system on the tower, hook on insulating fag end, and the assembly pulley couple hooks on insulating fag end, guarantee that this pulley system can provide sufficient laborsaving effect, reduce electrician's operation burden, and make things convenient for the erectting of wire, in step A and E, at first make up the clearance check, it is the same with "river net area" shaft tower combination clearance and land shaft tower combination clearance to communicate with the expert of the china department of electrical sciences, carry out according to conventional check mode under the condition that satisfies humidity and does not reach 80%, check method is through AUTOCAD software to shaft tower 1: drawing, simulating a hanging basket method or a Chinese character 'shi' ladder method for a tower window structure, meeting the safety distance required by safety regulations, ensuring that the minimum combined gap is 5.02 meters, ensuring that the combined gap meets the hot-line work condition and ensuring the operation space of users.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an operation process for electrically accessing an electric transmission line in a river network area to an equipotential includes the following steps:
step A: checking the working site condition, checking tools and materials, surveying and detecting the tools on site, putting the tools on a damp-proof tarpaulin, neatly putting the tools, comprehensively checking the appearance without leakage, cleaning the surfaces of a hard insulating tool and a new insulator by using a dry and clean towel, measuring the current temperature and humidity and wind speed by a ground electrician, supervising the appearance checking and testing of the tools and materials by the ground electrician by a working responsible person, and checking the connection condition of the electrician and an equipotential worker wearing shielding clothes on a tower by the working responsible person;
and B: checking the double names, performing a safety tool test, checking the double names of lines and the tower numbers, performing a safety tool impact test and inspection before tower climbing by a tower climbing person, and recording by a working responsible person;
and C: arranging hanging points on a tower, tying a transmission rope system, enabling an electrician to carry 3 backup protection ropes of 6 meters, climbing an insulating rope sleeve to the end part of a cross arm, tying a 6-meter extension rope, tying two extension ropes of 6 meters to the proper position of the end part of the cross arm, transmitting the other ends of the 2 extension ropes to the equipotential electrician from a horizontal plane below the cross arm, fixing the insulating rope sleeve at the proper position in the middle of the cross arm, climbing the tower to the tail part of the cross arm along with a second electrician on the tower by the insulating rope sleeve, tying the 6-meter extension rope on an equipotential electrician safety belt buckle by the second electrician on the tower, and fixing the insulating rope sleeve at the proper position of the tail part of the cross arm by the equipotential electrician;
step D: the system comprises a transmission pulley block system, a ground electrician, a pulley block system and a herringbone ladder, wherein the ground electrician arranges a circulating rope system on a tower foot, the transmission rope is placed in a tower foot pulley after the electrician on the tower beats a transmission rope hanging point, a transmission rope hook is tied, the pulley block system and the herringbone ladder are transmitted to the electrician on the tower, a first electrician on the tower transmits the pulley block system to a second electrician on the tower from a cross arm lower plane, the second electrician on the tower is rapidly transmitted to an equipotential electrician, the equipotential electrician hooks the pulley block hook on an insulating rope sleeve after receiving the pulley block, and the herringbone ladder and a 6-meter extension rope are hooked on the pulley block;
step E: the equipotential electrician enters the equipotential, two ground electricians are matched with the equipotential electrician to enter the equipotential, the equipotential electrician sits on a Chinese character 'shi' ladder, a report work responsible person applies for entering the equipotential, the equipotential is quickly entered after the consent of the work responsible person, a lead is grabbed at a position 0.5 m away from the lead, the inner side of the lead is quickly drilled between sub-leads, and the Chinese character 'shi' ladder is hooked on the lead;
step F: eliminating the defect of the line, namely, routing the equipotential to the defect position on the lead to eliminate the defect;
step G: the equipotential electrician goes out the equipotential, the equipotential electrician sits in the scholar ladder, report work person in charge, under the cooperation of two electricians on the ground, the equipotential electrician waits that the loose hand withdraws from the equipotential after the assembly pulley atress goes out, the equipotential arrives on the cross arm after, untie the assembly pulley, the scholar ladder, 6 meters extension rope, give the assembly pulley second electrician on the tower by plane transfer under the cross arm, second electrician on the tower gives first electrician on the tower rapidly, first electrician on the tower transfers the assembly pulley to cross arm outside hanging point department by plane transfer under the cross arm, the hook is on the transmission rope couple. Meanwhile, a second electrician on the tower puts the stringing screw rod into a small hard canvas barrel and hangs the stringing screw rod on a transfer rope hook, the base is put into a common canvas barrel, and a ground electrician transfers the hard canvas barrel, the common canvas barrel, the ladder shaped like a Chinese character 'shi' and the transfer rope system to the ground;
step H: the device is arranged on the tower, the first electrician on the tower carries the transmission rope to go down the tower, the second electrician on the tower carries 2 extension ropes with the length of 6 meters and 1 extension rope with the length of 4 meters, the insulating rope sleeve is arranged on the tail of the first electrician to go down the tower, and the equipotential electrician carries the insulating rope sleeve to be arranged on the tail of the second electrician to go down the tower.
In the step A, according to site survey data, the construction of a floating bridge calculates the number of buoys used according to distance data L from a river bank to a tower measured by an unmanned aerial vehicle, the width D of the floating bridge (3 meters without special condition), the area S of the floating bridge is L multiplied by D, handrails are arranged on two sides of the floating bridge, the height is 1.2 meters, the area of a live working operation platform is calculated according to the area needed by the root of the tower and the operation, S is S1+ S2, S1 is L1 multiplied by L1, S2 is L1 multiplied by L2, L1 is root of the tower, the actual using length of L2 is calculated, the number of the buoys is determined according to the area of the live working operation platform, reasonable and accurate data are conveniently provided for the erection of a river network, the normal operation of a project is ensured, in the step C, 3 electrician horizontal stations are arranged on the tower, and the portable tool bags are carried by the electrician, the tools are conveniently taken, and the number of operators is increased, so that the working efficiency is improved, in the step D, the insulating transmission rope system climbs the tower to the end part of the cross arm, a second electrician on the tower takes out the first electrician transmission rope system, hooks the insulating rope sling and a pulley block hook on the insulating rope sling, so that the pulley system can provide enough labor-saving effect, the operation burden of the electrician is reduced, and the erection of a lead is facilitated, in the steps A and E, firstly, the combination gap is checked, the combination gap of the tower, which is communicated with a Chinese academy of Electrical sciences expert and is in the river network area, is the same as the combination gap of the tower on the land, and the checking is carried out according to a conventional checking mode under the condition that the humidity does not reach 80%, and the checking method is carried out on the tower 1 through AUTOCAD software: drawing, simulating a hanging basket method or a Chinese character 'shi' ladder method for a tower window structure, meeting the safety distance required by safety regulations, ensuring that the minimum combined gap is 5.02 meters, ensuring that the combined gap meets the hot-line work condition and ensuring the operation space of users.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. An operation process for electrified access equipotential of a power transmission line in a river network area is characterized by comprising the following steps: the method comprises the following steps:
step A: checking the working site condition, checking tools and materials, surveying and detecting the tools on site, putting the tools on a damp-proof tarpaulin, neatly putting the tools, comprehensively checking the appearance without leakage, cleaning the surfaces of a hard insulating tool and a new insulator by using a dry and clean towel, measuring the current temperature and humidity and wind speed by a ground electrician, supervising the appearance checking and testing of the tools and materials by the ground electrician by a working responsible person, and checking the connection condition of the electrician and an equipotential worker wearing shielding clothes on a tower by the working responsible person;
and B: checking the double names, performing a safety tool test, checking the double names of lines and the tower numbers, performing a safety tool impact test and inspection before tower climbing by a tower climbing person, and recording by a working responsible person;
and C: arranging hanging points on a tower, tying a transmission rope system, enabling an electrician to carry 3 backup protection ropes of 6 meters, climbing an insulating rope sleeve to the end part of a cross arm, tying a 6-meter extension rope, tying two extension ropes of 6 meters to the proper position of the end part of the cross arm, transmitting the other ends of the 2 extension ropes to the equipotential electrician from a horizontal plane below the cross arm, fixing the insulating rope sleeve at the proper position in the middle of the cross arm, climbing the tower to the tail part of the cross arm along with a second electrician on the tower by the insulating rope sleeve, tying the 6-meter extension rope on an equipotential electrician safety belt buckle by the second electrician on the tower, and fixing the insulating rope sleeve at the proper position of the tail part of the cross arm by the equipotential electrician;
step D: the system comprises a transmission pulley block system, a ground electrician, a pulley block system and a herringbone ladder, wherein the ground electrician arranges a circulating rope system on a tower foot, the transmission rope is placed in a tower foot pulley after the electrician on the tower beats a transmission rope hanging point, a transmission rope hook is tied, the pulley block system and the herringbone ladder are transmitted to the electrician on the tower, a first electrician on the tower transmits the pulley block system to a second electrician on the tower from a cross arm lower plane, the second electrician on the tower is rapidly transmitted to an equipotential electrician, the equipotential electrician hooks the pulley block hook on an insulating rope sleeve after receiving the pulley block, and the herringbone ladder and a 6-meter extension rope are hooked on the pulley block;
step E: the equipotential electrician enters the equipotential, two ground electricians are matched with the equipotential electrician to enter the equipotential, the equipotential electrician sits on a Chinese character 'shi' ladder, a report work responsible person applies for entering the equipotential, the equipotential is quickly entered after the consent of the work responsible person, a lead is grabbed at a position 0.5 m away from the lead, the inner side of the lead is quickly drilled between sub-leads, and the Chinese character 'shi' ladder is hooked on the lead;
step F: eliminating the defect of the line, namely, routing the equipotential to the defect position on the lead to eliminate the defect;
step G: the equipotential electrician goes out the equipotential, the equipotential electrician sits in the scholar ladder, report work person in charge, under the cooperation of two electricians on the ground, the equipotential electrician waits that the loose hand withdraws from the equipotential after the assembly pulley atress goes out, the equipotential arrives on the cross arm after, untie the assembly pulley, the scholar ladder, 6 meters extension rope, give the assembly pulley second electrician on the tower by plane transfer under the cross arm, second electrician on the tower gives first electrician on the tower rapidly, first electrician on the tower transfers the assembly pulley to cross arm outside hanging point department by plane transfer under the cross arm, the hook is on the transmission rope couple. Meanwhile, a second electrician on the tower puts the stringing screw rod into a small hard canvas barrel and hangs the stringing screw rod on a transfer rope hook, the base is put into a common canvas barrel, and a ground electrician transfers the hard canvas barrel, the common canvas barrel, the ladder shaped like a Chinese character 'shi' and the transfer rope system to the ground;
step H: the device is arranged on the tower, the first electrician on the tower carries the transmission rope to go down the tower, the second electrician on the tower carries 2 extension ropes with the length of 6 meters and 1 extension rope with the length of 4 meters, the insulating rope sleeve is arranged on the tail of the first electrician to go down the tower, and the equipotential electrician carries the insulating rope sleeve to be arranged on the tail of the second electrician to go down the tower.
2. The operation process for the live-line equipotential access of the power transmission line in the river network area according to claim 1, characterized in that: in the step A, according to field survey data, the construction of the floating bridge measures distance data L from a river bank to a tower and the width D of the floating bridge according to an unmanned aerial vehicle, the using number of the floating pontoons is calculated, the area S of the floating bridge is L multiplied by D, handrails are arranged on two sides of the floating bridge, the height of the floating bridge is 1.2 meters, the area of the live working operation platform is calculated according to the area needed by the root of the tower and the operation, S is S1+ S2, S1 is L1 multiplied by L1, S2 is L1 multiplied by L2, the root of the tower is L1, the actual using length of the operation is L2, and the number of the floating pontoons is determined according to the area of the live working operation platform.
3. The operation process for the live-line equipotential access of the power transmission line in the river network area according to claim 1, characterized in that: and in the step C, 3 electrician horizontal stations are arranged on the tower, and the portable tool bag is carried by the electrician.
4. The operation process for the live-line equipotential access of the power transmission line in the river network area according to claim 1, characterized in that: and D, the insulating transmission rope system climbs the tower to the end part of the cross arm, a second electrician on the tower takes out the first electrician transmission rope system and hooks the insulating rope sleeve, and the pulley block hook hooks the insulating rope sleeve.
5. The operation process for the live-line equipotential access of the power transmission line in the river network area according to claim 1, characterized in that: in the steps A and E, firstly, the combination clearance is checked, the combination clearance of the tower and the tower in the 'river network area' communicated with the expert of China academy of Electrical sciences is the same as the combination clearance of the tower and the tower on the land, the checking is carried out according to a conventional checking mode under the condition that the humidity does not reach 80%, and the checking method is used for checking the tower 1 through AUTOCAD software: 1, drawing, namely simulating a hanging basket method or a Chinese character 'shi' ladder method for a tower window structure to meet the safety distance required by safety regulations.
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| CN111884132A (en) * | 2020-08-21 | 2020-11-03 | 广州德晟电力科技有限公司 | Automatic laying vehicle for all-terrain bypass cables |
| CN112945990A (en) * | 2021-01-29 | 2021-06-11 | 四川赛康智能科技股份有限公司 | Multi-split power transmission line electrified visual X-ray detection device |
| CN114362034A (en) * | 2021-11-26 | 2022-04-15 | 宁波送变电建设有限公司 | Method for replacing overhead ground wire by using gallery wiring |
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| CN112945990A (en) * | 2021-01-29 | 2021-06-11 | 四川赛康智能科技股份有限公司 | Multi-split power transmission line electrified visual X-ray detection device |
| CN112945990B (en) * | 2021-01-29 | 2024-04-09 | 四川赛康智能科技股份有限公司 | Electrified visual X-ray detection device for multi-split transmission line |
| CN114362034A (en) * | 2021-11-26 | 2022-04-15 | 宁波送变电建设有限公司 | Method for replacing overhead ground wire by using gallery wiring |
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