CN104377599A - Cradle for live overhaul of helicopter - Google Patents
Cradle for live overhaul of helicopter Download PDFInfo
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- CN104377599A CN104377599A CN201410743842.6A CN201410743842A CN104377599A CN 104377599 A CN104377599 A CN 104377599A CN 201410743842 A CN201410743842 A CN 201410743842A CN 104377599 A CN104377599 A CN 104377599A
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- 238000012423 maintenance Methods 0.000 claims description 61
- 238000000034 method Methods 0.000 claims description 20
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- 238000004891 communication Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 238000000819 phase cycle Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000012549 training Methods 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 abstract description 8
- 238000003466 welding Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
- 239000000725 suspension Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invention relates to a cradle for live overhaul of a helicopter. The cradle is arranged under the helicopter through a rope and comprises a moving platform and an antislip baseplate arranged under the moving platform; hanging fittings used for being connected with the rope, tool boxes used for holding tools and a wire bracket used for holding wires are arranged on the moving platform. A pilot controls the helicopter to hover at the position for live overhaul, and a live overhaul operator directly stands in the cradle and applies related live overhaul tools and instruments for performing live overhaul such as ground wire damper replacement, live-wire preformed armor rod repair and spacer replacement. The cradle is formed by welding of round pipes, the requirement on live overhaul of the cradle can be well met under the condition that strength is satisfied, operation safety of the live overhaul operator is guaranteed effectively, and working efficiency of live overhaul is improved.
Description
Technical field:
The present invention relates to a kind of hanging basket for live-line maintenance operation, more specifically relate to a kind of hanging basket for helicopter live-line maintenance operation.
Background technology:
First helicopter live line working appears at the U.S., and the helicopter live line working technology of U.S.'s development is all build job platform in helicopter both sides or ventral, and operating personnel is sitting on platform, in the face of circuit homework.This operational method is called as platform operations method.Platform operations method carries limited mass, and Middle Phase circuit homework scarce capacity, and helicopter is in equipotential position, to the psychology of pilot's technology, live line working workman and technical requirement all very high.
In order to overcome traditional hotline maintenance activity duration length, complicated operation, Ren Yuanduo, by difficulties such as landform, traffic factor restrictions, needing badly and carrying out novel live line working technology.Helicopter power-operation is the new and high technology of world-class level, the means of the line upkeep maintenance of a kind of advanced person are considered to abroad, this technology of investigation and application, the objective demand of bulk power grid operational management and the needs of the company of lifting operating maintenance managerial skills, to the raising of circuit operation maintenance quality and economic benefit, there is positive effect, therefore research adopts helicopter to carry out electric operating, reply power network development trend, solve the effective ways of above-mentioned contradiction, and be that wherein technology is more advanced based on the helicopter live-line maintenance operation of hanging basket method.
Based on hanging basket method helicopter live-line maintenance operation, to refer to that by hanging basket control helicopter in hover in live-line maintenance operation by pilot, live-line maintenance operation personnel are standing directly in hanging basket by rope suspensions in helicopter bottom, be suitable for relevant live working tools, carry out live-line maintenance operation.Carry out upkeep operation based on hanging basket method helicopter live-line maintenance operation mainly in quadrifid interchange 500kv mono-time conventional line, job content comprises: change ground wire shockproof hammer, the repairing of live wire preformed armor rods and change conductor spacer etc.For the demand, a kind of hanging basket for helicopter live-line maintenance operation is proposed.
Summary of the invention:
The object of this invention is to provide a kind of hanging basket for helicopter live-line maintenance operation, described hanging basket can meet hanging basket live-line maintenance operation performance well, effectively ensure that the job safety of live-line maintenance operation personnel, improves live-line maintenance operation operating efficiency.
For achieving the above object, the present invention by the following technical solutions: a kind of hanging basket for helicopter live-line maintenance operation, described hanging basket is arranged on below helicopter by rope; Described hanging basket comprises movable platform and is arranged on the Skidproof bottom board below described movable platform; Described movable platform is provided with the hanging piece for connecting rope, the tool box for place tool and the wire support for placing wire.
A kind of hanging basket for helicopter live-line maintenance operation provided by the invention, described movable platform is the cuboid built by pipe; The diagonal of each side of described movable platform is provided with two cross-coupled pipes.
A kind of hanging basket for helicopter live-line maintenance operation provided by the invention, described hanging piece is hanger; Described hanger is arranged on four drift angles above described movable platform.
Another preferred a kind of hanging basket for helicopter live-line maintenance operation provided by the invention, described tool box is arranged on the pipe above described movable platform; Described wire support is the triangular prism support consisted of a side of pipe and described movable platform.
A preferred a kind of hanging basket for helicopter live-line maintenance operation more provided by the invention, the bottom of described movable platform four sides is provided with the baffle plate perpendicular to described Skidproof bottom board.
Another preferably a kind of hanging basket for helicopter live-line maintenance operation provided by the invention, the live line working process of described hanging basket is:
(1) pre-takeoff check;
(2) take off
(3) band point operating personnel checks electrified body;
(4) hanging basket enters equipotential;
(5) live-line maintenance operation is started;
(6) hanging basket and operating personnel leave equipotential;
(7) helicopter leads live line working personnel and hanging basket to land;
(8) scene is arranged.
Another preferably a kind of hanging basket for helicopter live-line maintenance operation provided by the invention, described helicopter needs to check it before take-off:
Helicopter demanded fuel checks, check auxiliary device, fast equipment device and dangerous discernment; Signature work ticket, dangerous spot control list and list is let in flight fly away.
Whether the outward appearance that Work tool and safety device are carried out in inspection ground is intact; The insulation resistance of insulating tool detects.
After checking the dual title of circuit, shaft tower number, phase sequence, staff carries out security tool shock test and inspection before work; Whether inspection shaft tower surrounding environment, helicopter insulation hoist cable and hanging basket tie point be intact;
Helicopter takes off by before training base office building, should steadily take off, and prevents hanging basket Dutch roll aloft; Observation helicopter power when spiraling.
Another preferably a kind of hanging basket for helicopter live-line maintenance operation provided by the invention, need carry out navigation obstruction identification and operation tower recognition and verification when live line working personnel are near electrified body; Helicopter slowly declines near conductor from the height higher than 30 meters, wire; The position of pilot residing for hanging basket and the distance with around electrified body thereof, and adjust flight attitude in time.
Another preferably a kind of hanging basket for helicopter live-line maintenance operation provided by the invention, when described hanging basket enter equipotential and distance job position 10 ~ 15 meters time, the operating personnel in hanging basket instructs pilot to decline helicopter by tripartite's communication apparatus and flight gesture; In decline process, pilot exchanges the speed and angle that helicopter declines with the live line working personnel moment, after live line working personnel arrive target location, after guaranteeing that hanging basket is reliably connected with wire, remove the connection of hanging basket and hoist cable, and notify that helicopter flies away from by pilot.
Another preferably a kind of hanging basket for helicopter live-line maintenance operation provided by the invention, when described live line working personnel start live-line maintenance operation, described live line working personnel start upkeep operation item by item according to work flow card request and step;
In maintenance process, ground crew, live line working personnel and pilot keep in communication unimpeded constantly; Live line working personnel circulate a notice of job progress and personal security's situation to ground crew at any time.
Another preferably a kind of hanging basket for helicopter live-line maintenance operation provided by the invention, after band point operating personnel completes maintenance, hanging basket and operating personnel leave equipotential, and described live line working personnel are informed by Three-Way Calling equipment and go straight up to persons on board and ground control personnel; Helicopter is flown to and decline of hovering, and rope is slowly put into job position, and rope and hanging basket are connected and fixed by live line working personnel, notify that pilot takes off; Pilot can leave after obtaining taking off and confirming, after hanging basket departs from wire, return to place.
Another preferably a kind of hanging basket for helicopter live-line maintenance operation provided by the invention, when needs carry out operation on the ground, repeats step (2)-(7) until operation completes.
With immediate prior art ratio, the invention provides technical scheme and there is following excellent effect
1, hanging basket of the present invention is large based on hanging basket method helicopter live-line maintenance operation hanging basket mounting space, weight is many, two operation maintainers and the Work tool being applicable to several work can be carried, the defect that limited mass is carried in platform method operation can be solved, improve the operating efficiency of live-line maintenance operation, extend live-line maintenance operation scope;
2, hanging basket of the present invention adopts circular tube structure part, on the basis ensureing mechanical property, can reduce wind to the full extent and carry, improve the fail safe of helicopter live line working;
3, the hanger in the present invention has two suspension connecting hole, ensures that hanging basket and helicopter are by two cover suspension, provide dual fail-safe to helicopter hanging basket, ensure the fail safe of helicopter live line working;
4, hanging basket of the present invention is provided with two tool boxes, and be convenient to receive small-sized Work tool, bottom design has antiskid plate, and surrounding is designed with baffle plate, prevents falling of Work tool, improves operating personnel's psychological security simultaneously;
5, be designed with wire support platform outside the hanging basket in the present invention, while operating personnel provides upkeep operation platform, can place the gold utensils such as wire preformed armor rods, convenient working personnel upkeep operation, reduces its labour intensity.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the hanging basket for helicopter live-line maintenance operation of the present invention;
Fig. 2 is barrel structure schematic diagram of the present invention;
Wherein, 1-hanger, 2-tool box, 3-wire support, 4-baffle plate, 5-movable platform, 6-Skidproof bottom board.
Embodiment
Below in conjunction with embodiment, the invention will be described in further detail.
Embodiment 1:
As shown in Figure 1-2, a kind of hanging basket for helicopter live-line maintenance operation of invention of this example, described hanging basket is arranged on below helicopter by rope; The Skidproof bottom board 6 that described hanging basket comprises movable platform 5 and is arranged on below described movable platform 5; Described movable platform 5 is provided with the hanging piece for connecting rope, the tool box 2 for place tool and the wire support 3 for placing wire.
Described movable platform 5 is the cuboid built by pipe; The diagonal of each side of described movable platform 5 is provided with two cross-coupled pipes.
Described hanging piece is hanger 1; Described hanger 1 is arranged on four angles above described movable platform 5.
Described tool box 2 adopts sheet metal component bending to form, and is suspended on the pipe above hanging basket movable platform 5 by elastic hook; Described wire support 3 is the triangular prism consisted of a side of pipe and described movable platform 5.
The bottom of described movable platform 5 four sides is provided with the baffle plate 4 perpendicular to described Skidproof bottom board 6.
Control helicopter in hover in live-line maintenance operation by pilot, live-line maintenance operation personnel are standing directly in hanging basket, are suitable for relevant live working tools, carry out live-line maintenance operation.As changed ground wire shockproof hammer, the repairing of live wire preformed armor rods and changing conductor spacer etc.The live line working process of described hanging basket is:
(1) pre-takeoff check
1. demanded fuel inspection, inspection auxiliary device and fast equipment device, dangerous discernment; Work ticket, dangerous spot control list and single signature is let in flight fly away.
2. whether intact on ground if carrying out the visual examination of Work tool and safety device; Insulating tool insulation resistance detects.
3., after checking the dual title of circuit, shaft tower number, phase sequence, staff carries out security tool shock test and inspection before work, and shaft tower surrounding environment, helicopter insulation hoist cable and hanging basket tie point check intact.
(2) take off
Helicopter takes off by before training base office building, should steadily take off, and prevents hanging basket Dutch roll aloft; Observation helicopter power when spiraling.
(3) personnel are near electrified body inspection
Operating personnel carries out navigation obstruction identification, operation tower number identifies, confirms, helicopter slowly declines near conductor from the height higher than 30 meters, wire; Pilot should check position residing for hanging basket and the distance with around electrified body thereof, and adjusts flight attitude in time.
(4) hanging basket enters equipotential
When hanging basket distance job position 10 ~ 15 meters, in hanging basket, operating personnel instructs pilot to decline helicopter by tripartite's communication apparatus and flight gesture, instruct pilot guidance helicopter decrease speed-slow/fast and helicopter near angle-high/low, left/right simultaneously; In decline process, pilot exchanges the speed and angle that helicopter declines with the line operator moment, arrive behind target location, after guaranteeing that hanging basket is reliably connected with wire until line operator, remove the connection of hanging basket and hoist cable, and notify that helicopter flies away from by pilot.
(5) live-line maintenance operation is started
Operating personnel starts upkeep operation item by item according to work flow card related request and step, after installing new conductor spacer, is removed by old conductor spacer near old conductor spacer.Complete the operation of restringing conductor spacer.
In maintenance process, ground crew, line operator and pilot three will keep in communication unimpeded in the moment.On-line operation personnel will circulate a notice of job progress and personal security's situation to ground crew at any time.
(6) hanging basket and operating personnel leave equipotential
After operating personnel completes maintenance, informed by Three-Way Calling equipment and go straight up to persons on board and ground control personnel.Aircraft is flown to, decline of hovering, and hoist cable is slowly put into job position, and hoist cable and hanging basket are connected and fixed by operating personnel, notify that pilot takes off.Pilot can leave, and slowly raise after obtaining taking off and confirming, after hanging basket departs from wire, return to place.
During flight, operating personnel should carry out self fixed protection measure.
(7) land
Until hanging basket close on land time, ground crew should guide hanging basket to enter ground bracket along with the decline of helicopter in time, simultaneously note prevent hoist cable blown afloat after and lifting airscrew be wound around.
Conductor spacer old in hanging basket takes out by ground crew, puts into preformed armor rods.Repeat step (2)-(7), complete preformed armor rods and repair wire operation.
Until hanging basket close on land time, ground crew should guide hanging basket to enter ground bracket along with the decline of helicopter in time.
Repair sleeve is put into hanging basket by ground crew.Repeat step (2)-(7), complete repair sleeve and repair wire operation.
(8) scene is arranged
Work tool service condition is looked in inspection.Work tool cleaning is tidied up complete pack (case) by operating personnel, accomplishes that work is complete, material is clean, site clearing.Hoist cable puts into chest after regaining in time, prevents hoist cable from making moist.Hanging basket puts into ground bracket, fixing safe, utilizes transport vehicle to transport back.
Helicopter hanging basket method live line working guiding book sees appendix 6.
Helicopter hanging basket method live line working traveler sees appendix 7.
Flight operation respectively ensures that professional field operation flow process sees appendix 8.
3. meteorological condition
Operation should be carried out under good weather.As thunder and lightning (hear thunder, see lightning), misty rain etc., forbidden to carry out live line working; Be greater than 5 grades (10m/s) as wind-force or humidity is greater than 80% time, should not live line working be carried out.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; although those of ordinary skill in the field are to be understood that with reference to above-described embodiment: still can modify to the specific embodiment of the present invention or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims of the present invention awaited the reply.
Claims (12)
1., for a hanging basket for helicopter live-line maintenance operation, described hanging basket is arranged on below helicopter by rope; It is characterized in that: described hanging basket comprises movable platform and is arranged on the Skidproof bottom board below described movable platform; Described movable platform is provided with the hanging piece for connecting rope, the tool box for place tool and the wire support for placing wire.
2. a kind of hanging basket for helicopter live-line maintenance operation as claimed in claim 1, is characterized in that: described movable platform is the cuboid built by pipe; The diagonal of each side of described movable platform is provided with two cross-coupled pipes.
3. a kind of hanging basket for helicopter live-line maintenance operation as claimed in claim 2 or claim 3, is characterized in that: described hanging piece is hanger; Described hanger is arranged on four drift angles above described movable platform.
4. a kind of hanging basket for helicopter live-line maintenance operation as claimed in claim 2 or claim 3, is characterized in that: described tool box is arranged on the pipe above described movable platform; Described wire support is the triangular prism support consisted of a side of pipe and described movable platform.
5. a kind of hanging basket for helicopter live-line maintenance operation as claimed in claim 1, is characterized in that: the bottom of described movable platform four sides is provided with the baffle plate perpendicular to described Skidproof bottom board.
6. a kind of hanging basket for helicopter live-line maintenance operation as claimed in claim 1, is characterized in that: the live line working process of described hanging basket is:
(1) pre-takeoff check;
(2) take off
(3) band point operating personnel checks electrified body;
(4) hanging basket enters equipotential;
(5) live-line maintenance operation is started;
(6) hanging basket and operating personnel leave equipotential;
(7) helicopter leads live line working personnel and hanging basket to land;
(8) scene is arranged.
7. a kind of hanging basket for helicopter live-line maintenance operation as claimed in claim 6, is characterized in that: described helicopter needs to check it before take-off:
Helicopter demanded fuel checks, check auxiliary device, fast equipment device and dangerous discernment; Signature work ticket, dangerous spot control list and list is let in flight fly away.
Whether the outward appearance that Work tool and safety device are carried out in inspection ground is intact; The insulation resistance of insulating tool detects.
After checking the dual title of circuit, shaft tower number, phase sequence, staff carries out security tool shock test and inspection before work; Whether inspection shaft tower surrounding environment, helicopter insulation hoist cable and hanging basket tie point be intact;
Helicopter takes off by before training base office building, should steadily take off, and prevents hanging basket Dutch roll aloft; Observation helicopter power when spiraling.
8. a kind of hanging basket for helicopter live-line maintenance operation as claimed in claim 7, is characterized in that: need carry out navigation obstruction identification and operation tower recognition and verification when live line working personnel are near electrified body; Helicopter slowly declines near conductor from the height higher than 30 meters, wire; The position of pilot residing for hanging basket and the distance with around electrified body thereof, and adjust flight attitude in time.
9. a kind of hanging basket for helicopter live-line maintenance operation as claimed in claim 8, it is characterized in that: when described hanging basket enter equipotential and distance job position 10 ~ 15 meters time, the operating personnel in hanging basket instructs pilot to decline helicopter by tripartite's communication apparatus and flight gesture; In decline process, pilot exchanges the speed and angle that helicopter declines with the live line working personnel moment, after live line working personnel arrive target location, after guaranteeing that hanging basket is reliably connected with wire, remove the connection of hanging basket and hoist cable, and notify that helicopter flies away from by pilot.
10. a kind of hanging basket for helicopter live-line maintenance operation as claimed in claim 9, it is characterized in that: when described live line working personnel start live-line maintenance operation, described live line working personnel start upkeep operation item by item according to work flow card request and step;
In maintenance process, ground crew, live line working personnel and pilot keep in communication unimpeded constantly; Live line working personnel circulate a notice of job progress and personal security's situation to ground crew at any time.
11. a kind of hanging baskets for helicopter live-line maintenance operation as claimed in claim 10, it is characterized in that: after band point operating personnel completes maintenance, hanging basket and operating personnel leave equipotential, and described live line working personnel are informed by Three-Way Calling equipment and go straight up to persons on board and ground control personnel; Helicopter is flown to and decline of hovering, and rope is slowly put into job position, and rope and hanging basket are connected and fixed by live line working personnel, notify that pilot takes off; Pilot can leave after obtaining taking off and confirming, after hanging basket departs from wire, return to place.
12. a kind of hanging baskets for helicopter live-line maintenance operation as described in claim 6-11 any one, is characterized in that: when needs carry out operation on the ground, repeat step (2)-(7) until operation completes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410743842.6A CN104377599B (en) | 2014-12-08 | 2014-12-08 | A kind of hanging basket for helicopter live-line maintenance operation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410743842.6A CN104377599B (en) | 2014-12-08 | 2014-12-08 | A kind of hanging basket for helicopter live-line maintenance operation |
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| Publication Number | Publication Date |
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| CN104377599A true CN104377599A (en) | 2015-02-25 |
| CN104377599B CN104377599B (en) | 2018-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410743842.6A Active CN104377599B (en) | 2014-12-08 | 2014-12-08 | A kind of hanging basket for helicopter live-line maintenance operation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329387A (en) * | 2016-09-30 | 2017-01-11 | 国网江苏省电力公司徐州供电公司 | Maintenance device of automatic power transmission line |
| CN108879482A (en) * | 2018-08-23 | 2018-11-23 | 国网江苏省电力有限公司南通供电分公司 | A kind of automobile-used maintenance platform of power grid repairing |
| CN109256721A (en) * | 2017-07-14 | 2019-01-22 | 国网通用航空有限公司 | A kind of helicopter live-line maintenance operation hanging basket |
| CN109437009A (en) * | 2018-12-06 | 2019-03-08 | 广东腾盛模架科技有限公司 | A kind of small-sized cage of bridge construction |
| CN113315025A (en) * | 2021-05-10 | 2021-08-27 | 国网河北省电力有限公司检修分公司 | Live-line maintenance operation method for helicopter |
| CN114156777A (en) * | 2021-12-09 | 2022-03-08 | 国网冀北电力有限公司检修分公司 | A operation platform for changing six ally oneself with strain insulator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2669474B1 (en) * | 1990-11-19 | 1993-06-18 | Electricite De France | MODULAR HELICOPTERED PLATFORM, INTENDED TO BE DEPOSITED ON AERIAL CABLES. |
| FR2675964B1 (en) * | 1991-04-29 | 1995-03-10 | Electricite De France | HELIPORTED NACELLE AND METHOD FOR REPLACING A SLEEVE ON AN AERIAL CABLE. |
| FR2675962B1 (en) * | 1991-04-29 | 1993-07-23 | Electricite De France | INTERVENTION PROCESS ON AIR CABLES USING A HELIPORTED NACELLE AND FORK. |
-
2014
- 2014-12-08 CN CN201410743842.6A patent/CN104377599B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329387A (en) * | 2016-09-30 | 2017-01-11 | 国网江苏省电力公司徐州供电公司 | Maintenance device of automatic power transmission line |
| CN106329387B (en) * | 2016-09-30 | 2017-12-05 | 国网江苏省电力公司徐州供电公司 | A kind of self-action Maintenance of Electric Transmission Line device |
| CN109256721A (en) * | 2017-07-14 | 2019-01-22 | 国网通用航空有限公司 | A kind of helicopter live-line maintenance operation hanging basket |
| CN108879482A (en) * | 2018-08-23 | 2018-11-23 | 国网江苏省电力有限公司南通供电分公司 | A kind of automobile-used maintenance platform of power grid repairing |
| CN108879482B (en) * | 2018-08-23 | 2024-06-04 | 国网江苏省电力有限公司南通供电分公司 | Maintenance platform for power grid rush-repair vehicle |
| CN109437009A (en) * | 2018-12-06 | 2019-03-08 | 广东腾盛模架科技有限公司 | A kind of small-sized cage of bridge construction |
| CN113315025A (en) * | 2021-05-10 | 2021-08-27 | 国网河北省电力有限公司检修分公司 | Live-line maintenance operation method for helicopter |
| CN114156777A (en) * | 2021-12-09 | 2022-03-08 | 国网冀北电力有限公司检修分公司 | A operation platform for changing six ally oneself with strain insulator |
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| Publication number | Publication date |
|---|---|
| CN104377599B (en) | 2018-08-28 |
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