CN109546569A - The operational method of insulated flexible ladder coaster is installed by unmanned plane - Google Patents
The operational method of insulated flexible ladder coaster is installed by unmanned plane Download PDFInfo
- Publication number
- CN109546569A CN109546569A CN201811389172.7A CN201811389172A CN109546569A CN 109546569 A CN109546569 A CN 109546569A CN 201811389172 A CN201811389172 A CN 201811389172A CN 109546569 A CN109546569 A CN 109546569A
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- unmanned plane
- pawl
- hitcher
- coaster
- insulated flexible
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000009434 installation Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 238000010276 construction Methods 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 230000003447 ipsilateral effect Effects 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 5
- 230000006978 adaptation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
Abstract
The present invention relates to a kind of methods installed using unmanned plane to line facility, especially a kind of operational method that insulated flexible ladder coaster is installed by unmanned plane, its step includes: 1) to provide a kind of insulated flexible ladder coaster and a kind of pawl hitcher with inversion centrum frame, pawl hitcher can hook insulated flexible ladder coaster, and be realized by ratchet to the relatively fixed of coaster；2) unmanned plane connects pawl hitcher, and pawl hitcher hook connects coaster, and control unmanned plane reaches side of wire with the two, introduces below the top sheave in coaster conducting wire by supratrochlear guiding stock, completes overlap joint；3) pawl hitcher is detached from coaster by control unmanned plane, completes the installation exercise of coaster.The present invention has the advantages that being based on existing unmanned air vehicle technique, so that unmanned plane installation insulated flexible ladder coaster is effectively realized, a large amount of manpower and material resources are saved, and greatly shorten the activity duration, operating efficiency is improved, the security hidden trouble of operating personnel's high altitude operation is avoided.
Description
Technical field
The present invention relates to a kind of method installed using unmanned plane to line facility, especially one kind passes through unmanned plane
The operational method of insulated flexible ladder coaster is installed.
Background technique
In the prior art, insulated flexible ladder is common equipment in work transmission line, is led in use, operating personnel carries
Line side coaster will have choosing for insulating cord by insulating bar by the cross-arm of operating personnel's climbing to steel tower corresponding lead
Onto conducting wire, then by the installation of ground staff's progress insulated flexible ladder.Whole operation process needs a large amount of manpower and material resources cooperation, and
Time-consuming, operating efficiency is low, while there is also the personal safety potential problems of operating personnel.
Summary of the invention
One kind is provided it is an object of the invention to shortcoming according to prior art can largely save human and material resources,
It is time-consuming it is short, operating efficiency is high, can reduce operating personnel's personal safety hidden danger insulated flexible ladder coaster is installed by unmanned plane
Operational method.
Purpose of the present invention is realized by following approach:
The operational method that insulated flexible ladder coaster is installed by unmanned plane, is characterized by, comprises the following steps that
1) a kind of insulated flexible ladder coaster is provided comprising have open frame, top sheave and lower sheave component, open frame includes falling
U-bracket and connecting bracket, top sheave are mounted in inverted U bracket, and connecting bracket is connect with lower sheave component；Wherein inverted U
Bracket side plate and connecting bracket Construction integration, another side plate are a kind of hollow loop bar, the free end of the hollow loop bar lower part
To construct in the brace that turns up, a guiding stock is fixedly connected in the end of brace construction, at the brace construction of hollow loop bar
With ipsilateral formation one opening where connecting bracket；It further include having a deadlock lever, which is located in hollow loop bar, up and down
Both ends are provided with limiting device, are fixedly installed with a becket by connecting rod in the top end part of deadlock lever, more connecting rods with
Becket constitutes inverted cone framework；Deadlock lever is downward under the effect of gravity under normality, and bottom end is close to the end of connecting bracket
Portion so that open frame be in closed state, when deadlock lever is pulled up upwards by lower end limiting device effect still remain in it is hollow
In loop bar, open frame is in put state at this time；
2) a kind of pawl hitcher is provided comprising have hook and mobile jib, the top end part of mobile jib is provided with interconnecting piece, and hook is at least
Three and it is evenly distributed on the collar of mobile jib, in radial centered on mobile jib, each hook upper surface is evenly distributed with hook
For point towards the ratchet of mobile jib, the distance between two neighboring ratchet is greater than the ring body section diameter of becket, hook one end and master
Bar is fixedly connected, and the other end is then the free end being bent upwards；
3) a kind of unmanned plane is provided, is provided with connecting elements on the unmanned plane, the interconnecting piece of the connecting elements and pawl hitcher connects
It connects, the hook on pawl hitcher is passed through into inverted cone framework, i.e. space between connecting rod, and mention upwards, so that becket
It is hooked in the ratchet of hook；It continues up and lifts becket, the deadlock lever connecting at this time with becket is mentioned upwards therewith
It rising, the opening of open frame is in open state,
4) start unmanned plane, unmanned plane carries insulated flexible ladder coaster by pawl hitcher and flies to side of wire, and control unmanned plane will
Insulated flexible ladder coaster takes at conducting wire, first rides over guiding stock on conducting wire, and being then displaced sideways will insulate along guiding stock
Rope ladder coaster moves into conducting wire and enters in inverted U bracket up to conducting wire is constructed via guiding stock, brace, and rabbets with top sheave,
Insulated flexible ladder coaster is in place；
5) control unmanned plane slowly moves down, and band pawl hitcher and becket move downward, and deadlock lever is in the process
Opening that is mobile toward connecting bracket direction gradually downward and closing open frame is latched until the opening of open frame is blocked
Bar and becket stopping move downward, and pawl hitcher is then further downward, until becket is detached from pawl hitcher hook
Ratchet, control unmanned plane is mobile to the direction far from becket, keeps moving direction and penetrates the hook extension side of cone framework
To on the contrary, until hook completely disengages cone framework；
6) control unmanned plane leaves conducting wire with pawl hitcher；Insulated flexible ladder coaster completes the installation at conducting wire.
In this way, control unmanned plane completes the installation of the insulated flexible ladder coaster of high altitude wire side, a large amount of manpower can be saved
Material resources, in the insulated flexible ladder coaster deadlock lever of targeted design and on the basis of being inverted the pawl hitcher of centrum framework and adaptation,
The unmanned plane activity duration greatly shortens compared to manpower installation, effectively increases operating efficiency, while also solving high altitude operation people
The security hidden trouble of member.
After the operation for completing side of wire, the insulated flexible ladder coaster at conducting wire can also be removed by unmanned plane, specifically
Job step is as follows:
1) connecting elements of unmanned plane is connect with the interconnecting piece of pawl hitcher；
2) start unmanned plane, reached above the insulated flexible ladder coaster of side of wire with pawl hitcher, control unmanned plane makes hook
Free end is directed at the space on the cone framework of insulated flexible ladder coaster between two connecting rods, and then transverse shifting pawl hitcher, makes
It obtains hook completion and penetrates cone framework, lift pawl hitcher then up, enable between the ratchet on metal bail insertion hook, it is complete
At the connection of pawl hitcher and insulated flexible ladder coaster；
3) control unmanned plane continues up, and the deadlock lever with pawl hitcher pull-up connection becket, until deadlock lever
The opening of open frame is fully opened, insulated flexible ladder coaster is then further lifted, until conducting wire leaves top sheave and reaches
The opening of open frame,
4) control unmanned plane is mobile to side, so that conducting wire deviates from open frame, and leaves the guiding stock of insulated flexible ladder coaster,
Finally control unmanned plane leaves conducting wire with pawl hitcher and insulated flexible ladder coaster, completes unloading for insulated flexible ladder coaster and is taken as
Industry.
The hook with ratchet is 3-4, preferably 3, it is ensured that the space of hook 2 operates needs enough, keeps away simultaneously
Exempt from hook to interfere with supratrochlear centrum framework, influences operating reliability.The becket can be circular rings, can also be with
It is triangular loop, preferably circular ring shape, the energy multi-faceted adaptation pawl hitcher of multi-angle, circular rings arrange in pairs or groups connecting rod as 3-4 root, form circle
Cone framework, triangle are arranged in pairs or groups 3, connecting rod, and triangle centrum framework is formed.Ring body section is circle, convenient for connecting and taking off with ratchet
From.High-definition camera, captured data transmission to ground control cabinet, convenient for improving operation should be also configured on unmanned plane
Accuracy and efficiency.
In conclusion the present invention provides the insulated flexible ladder coaster installation method based on unmanned air vehicle technique, based on existing
Unmanned air vehicle technique, creative designs corresponding pawl hitcher and coaster so that unmanned plane install insulated flexible ladder coaster
It is effectively realized, saves a large amount of manpower and material resources, and greatly shorten the activity duration, improved operating efficiency, avoid operation people
The security hidden trouble of member's high altitude operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the insulated flexible ladder coaster of the present invention based on unmanned air vehicle technique；
Fig. 2 is the structural schematic diagram of the pawl hitcher of the present invention based on unmanned air vehicle technique；
Fig. 3 show the top view of pawl hitcher, i.e., view downward from circular ring shape interconnecting piece.
The present invention is described further below with reference to embodiment.
Specific embodiment
Most preferred embodiment:
Insulated flexible ladder coaster installation method of the present invention based on unmanned air vehicle technique is related to the mating Work tool of following two, insulation
Rope ladder coaster and pawl hitcher.
Referring to attached drawing 1, insulated flexible ladder coaster includes open frame, top sheave 1 and lower sheave component 2, open frame packet
Inverted U bracket 3 and connecting bracket 4 are included, top sheave 1 is mounted in inverted U bracket 3, and the L-shaped construction of connecting bracket 4, bending place is set
It is equipped with reinforcement plate muscle, lower plane of structure is connect with lower sheave structure 2；Wherein 3 side plate of inverted U bracket and 4 Construction integration of connecting bracket,
Another side plate is a kind of hollow loop bar 5, and the free end of hollow 5 lower part of loop bar is in the brace construction 6 to turn up, in brace structure
The end for making 6 is fixedly connected with a guiding stock 7, and the junction of the brace construction 6 and guiding stock 7 is the company of smooth transition
It connects.Ipsilateral formation one opening 8 at the brace construction 6 of hollow loop bar and where connecting bracket 4；It further include having a deadlock lever 9,
The deadlock lever 9 is located in hollow loop bar 5, and upper and lower ends are provided with limiting device, passes through connecting rod 10 in the top end part of deadlock lever 9
It is fixedly connected with a metal ring 11, the ring body section of metal ring 11 is circle, and the connecting rod 10 has three, and every connecting rod is equal
One end is fixed on circular annulus and the other end is fixed on the top end part of deadlock lever 9, and three connecting rods 10 are connect with metal ring 11
Point be rendered as the vertex of equilateral triangle, connecting rod and metal ring constitute a kind of inverted cone framework；It is latched under normality
Freely falling body is downward under the effect of gravity for bar 9, is supported in hollow loop bar 5 by the effect of upper end limiting device, bottom end is close to even
The end of bracket 4 is connect, so that opening 8 is in closed state, is still protected when deadlock lever 9 is pulled up upwards by the effect of lower end limiting device
It holds and is located in hollow loop bar 5, and can be by the mutual supporting role realization of the lower end limiting device and hollow loop bar to entirely opening
The lifting of mouth frame, opening 8 is in put state at this time.
Referring to attached drawing 2 and attached drawing 3, pawl hitcher includes hook 12 and mobile jib 13, and the top end part of mobile jib 13 is provided with circle
Annular interconnecting piece 14, hook 12 there are three and radiated and extend outwardly centered on mobile jib, the equidistant ring for being evenly distributed on mobile jib
It encloses, 12 one end of hook is fixedly connected with mobile jib, and the other end is then the free end being bent upwards, and the upper surface between both ends is uniformly divided
It is furnished with ratchet 21 of multiple bills towards mobile jib, the ring body section that the distance between two neighboring ratchet 21 is greater than metal ring is straight
Diameter.Height space on coaster in cone framework between adjacent links should be greater than the vertical height of hook 12 itself, while hook
Length of the pawl from mobile jib to knee should be greater than metal ring it is outer diametrically.
It is of the present invention that insulated flexible ladder coaster is installed by unmanned plane according to above-mentioned insulated flexible ladder coaster and pawl hitcher
Operational method, the specific steps of which are as follows:
1) a kind of unmanned plane is provided, is provided with connecting elements on the unmanned plane, the interconnecting piece of the connecting elements and pawl hitcher connects
It connects, the hook 12 on pawl hitcher is passed through into inverted cone framework, that is, protrude into the space between connecting rod until touching master
Bar mentions then up so that the downward hook of metal ring 11 between the ratchet of hook in, the hook described at this time should be across
Metal ring simultaneously has handover at two with it, it is ensured that certain balance is able to maintain when coaster is moved with unmanned plane, it is ensured that coaster is just
The reliability of position installation；It continues up and lifts becket, the deadlock lever connecting at this time with metal ring is lifted up therewith, is opened
The opening of mouth frame is in open state.
2) start unmanned plane, unmanned plane carries insulated flexible ladder coaster by claw type gripping apparatus and flies to side of wire, controls nobody
Machine takes insulated flexible ladder coaster at conducting wire to, first rides over guiding stock 7 on conducting wire, then will insulate along guiding stock 7 soft
Terraced coaster shifts near side of wire and enters in inverted U bracket 3 up to conducting wire constructs 6 via guiding stock 7, brace, and embedding with top sheave 1
It connects, insulated flexible ladder coaster is in place.
3) control unmanned plane slowly moves down, and band pawl hitcher and metal ring 11 move downward, and deadlock lever 9 exists
This is mobile toward 4 direction of connecting bracket gradually downward in the process and closes the opening of open frame, until the opening quilt of open frame
Locking, deadlock lever 9 and metal ring stopping move downward, and then band pawl hitcher further slows down downwards unmanned plane, until gold
Belong to the ratchet that ring is detached from pawl hitcher hook, it is ensured that the free tail end of hook is lower than under metal ring along side, controls unmanned plane
It is mobile to the direction far from becket, it keeps moving direction and penetrates the hook extending direction of cone framework on the contrary, until hook
Completely disengage inverted conical body framework.
4) control unmanned plane leaves side of wire with pawl hitcher；Insulated flexible ladder coaster completes the installation at conducting wire.
Further, the present invention also provides the operational method that insulated flexible ladder coaster is installed by unmanned plane, specific steps
It is as follows:
1) connecting elements of unmanned plane is connect with the interconnecting piece of pawl hitcher；
2) start unmanned plane, reach above the insulated flexible ladder coaster of side of wire with pawl hitcher close to the one of cone framework
Side, control unmanned plane make the space on the cone framework of hook free end alignment insulated flexible ladder coaster between two connecting rods, institute
Orientation where the space of selection preferably guides stock, is more advantageous to coaster and unloads extract operation, then transverse shifting pawl hitcher, makes
Hook penetrates cone framework, lifts pawl hitcher then up, enables between the pawl on round metal bail insertion hook, completes
The connection of pawl hitcher and insulated flexible ladder coaster；
3) control unmanned plane continues up, and the deadlock lever with pawl hitcher pull-up connection metal ring, until locking
Bar fully opens the opening of open frame, then further lifts insulated flexible ladder coaster, until top sheave far from conducting wire and is opened
The opening of mouth frame is directed at conducting wire,
4) control unmanned plane is mobile to side, so that the opening of conducting wire abjection open frame, and grown along brace construction, guiding
Bar is displaced outwardly, the guiding stock up to leaving insulated flexible ladder coaster, at this time unmanned plane, pawl hitcher and insulated flexible ladder coaster
Far from conducting wire, unmanned plane is finally controlled with pawl hitcher and insulated flexible ladder coaster and leaves conducting wire, completes insulated flexible ladder
Unloading for coaster is taken as industry.
Other than above-mentioned steps, the invention also includes following main points:
1, camera is configured on unmanned plane, can observe operating process on the ground in this way, and preferably control unmanned plane and mesh
Position and distance between mark, realization are precisely controlled operation.
2, the length for guiding stock should be more than twice of inverted U support width, convenient for unmanned aerial vehicle (UAV) control coaster and conducting wire
Overlap joint, such coaster can be more advantageous to and be installed on conducting wire.
The not described part of the present invention is same as the prior art.
Claims (3)
1. installing the operational method of insulated flexible ladder coaster by unmanned plane, which is characterized in that comprise the following steps that
There is provided a kind of insulated flexible ladder coaster comprising have open frame, top sheave and lower sheave component, open frame includes U
Type bracket and connecting bracket, top sheave are mounted in inverted U bracket, and connecting bracket is connect with lower sheave component；Wherein inverted U branch
Frame side plate and connecting bracket Construction integration, another side plate are a kind of hollow loop bar, and the free end of the hollow loop bar lower part is
In the brace construction to turn up, be fixedly connected with a guiding stock in the end of brace construction, at the brace construction of hollow loop bar with
Ipsilateral formation one opening where connecting bracket；It further include having a deadlock lever, which is located in hollow loop bar, and upper and lower two
End is provided with limiting device, is fixedly installed with a becket, more connecting rods and gold by connecting rod in the top end part of deadlock lever
Belong to ring and constitutes inverted cone framework；Deadlock lever is downward under the effect of gravity under normality, bottom end close to the end of connecting bracket,
So that open frame is in closed state, hollow loop bar is still remained in by the effect of lower end limiting device when deadlock lever is pulled up upwards
In, open frame is in put state at this time；
There is provided a kind of pawl hitcher comprising have hook and mobile jib, the top end part of mobile jib is provided with interconnecting piece, hook at least three
Collar that is a and being evenly distributed on mobile jib, in radial centered on mobile jib, each hook upper surface is evenly distributed with bill
Towards the ratchet of mobile jib, the distance between two neighboring ratchet is greater than the ring body section diameter of becket, hook one end and mobile jib
It is fixedly connected, the other end is then the free end being bent upwards；
A kind of unmanned plane is provided, is provided with connecting elements on the unmanned plane, which connect with the interconnecting piece of pawl hitcher,
Hook on pawl hitcher is passed through into inverted cone framework, i.e. space between connecting rod, and is mentioned upwards, so that becket is hooked
In the ratchet of hook；It continues up and lifts becket, the deadlock lever connecting at this time with becket is lifted up therewith, is opened
The opening of mouth frame is in open state,
Start unmanned plane, unmanned plane carries insulated flexible ladder coaster by pawl hitcher and flies to side of wire, and control unmanned plane will be exhausted
Edge rope ladder coaster takes at conducting wire, first will guiding stock ride on conducting wire, be then displaced sideways along guiding stock will insulate it is soft
Terraced coaster moves into conducting wire until conducting wire enters in inverted U bracket via guiding stock, brace construction, and rabbets with top sheave, absolutely
Edge rope ladder coaster is in place；
Control unmanned plane slowly move down, band pawl hitcher and becket move downward, deadlock lever in the process by
Gradually past connecting bracket direction is mobile downwards and closes the opening of open frame, until the opening of open frame is blocked, deadlock lever
It is moved downward with becket stopping, and pawl hitcher is then further downward, until becket is detached from the spine on pawl hitcher hook
Tooth, control unmanned plane is mobile to the direction far from becket, keeps moving direction and penetrates the hook extending direction of cone framework
On the contrary, until hook completely disengages cone framework；
It controls unmanned plane and leaves conducting wire with pawl hitcher；Insulated flexible ladder coaster completes the installation at conducting wire.
2. the operational method according to claim 1 for installing insulated flexible ladder coaster by unmanned plane, which is characterized in that pass through
Unmanned plane, which unloads, takes insulated flexible ladder coaster to comprise the following steps that
The connecting elements of unmanned plane is connect with the interconnecting piece of pawl hitcher；
Start unmanned plane, reached above the insulated flexible ladder coaster of side of wire with pawl hitcher, control unmanned plane makes hook certainly
By the space between two connecting rods on the cone framework of end alignment insulated flexible ladder coaster, then transverse shifting pawl hitcher, so that
Hook completion penetrates cone framework, lifts pawl hitcher then up, enables between the pawl on metal bail insertion hook, completes
The connection of pawl hitcher and insulated flexible ladder coaster；
Control unmanned plane continues up, and the deadlock lever with pawl hitcher pull-up connection becket, until deadlock lever is complete
The full opening for opening open frame, then further lifts insulated flexible ladder coaster, opens until conducting wire leaves top sheave and reaches
The opening of mouth frame,
It is mobile to side to control unmanned plane, so that conducting wire deviates from open frame, and leaves the guiding stock of insulated flexible ladder coaster, most
Control unmanned plane leaves conducting wire with pawl hitcher and insulated flexible ladder coaster afterwards, completes unloading for insulated flexible ladder coaster and is taken as industry.
3. the operational method according to claim 1 for installing insulated flexible ladder coaster by unmanned plane, which is characterized in that described
Hook with ratchet is 3-4, the becket circular rings or triangular loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811389172.7A CN109546569B (en) | 2018-11-21 | 2018-11-21 | Operation method for installing insulation rope ladder pulley through unmanned aerial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811389172.7A CN109546569B (en) | 2018-11-21 | 2018-11-21 | Operation method for installing insulation rope ladder pulley through unmanned aerial vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109546569A true CN109546569A (en) | 2019-03-29 |
| CN109546569B CN109546569B (en) | 2024-01-05 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811389172.7A Active CN109546569B (en) | 2018-11-21 | 2018-11-21 | Operation method for installing insulation rope ladder pulley through unmanned aerial vehicle |
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| Country | Link |
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| CN (1) | CN109546569B (en) |
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| CN105390988A (en) * | 2015-12-17 | 2016-03-09 | 国家电网公司 | Ultra-high voltage power transmission line equipotential live working device and use method thereof |
| CN206412696U (en) * | 2017-02-10 | 2017-08-15 | 四川中飞赛维航空科技有限公司 | A kind of insulation coaster that construction is carried based on rotor wing unmanned aerial vehicle |
| CN209709541U (en) * | 2018-11-21 | 2019-11-29 | 国网福建省电力有限公司 | Insulated flexible ladder coaster mounting device based on unmanned plane |
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2018
- 2018-11-21 CN CN201811389172.7A patent/CN109546569B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0672564A2 (en) * | 1994-03-16 | 1995-09-20 | Nippondenso Co., Ltd. | Seat belt tightening device |
| US7264204B1 (en) * | 2005-12-12 | 2007-09-04 | The United States Of America As Represented By The Secretary Of The Navy | Unmanned aerial vehicle catcher |
| KR20070070615A (en) * | 2005-12-29 | 2007-07-04 | 한국전기공사협회 | Guide rail set |
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| Publication number | Publication date |
|---|---|
| CN109546569B (en) | 2024-01-05 |
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