CN109322532A - A kind of electric hoisting pole of group of vertical power transmission line column - Google Patents
A kind of electric hoisting pole of group of vertical power transmission line column Download PDFInfo
- Publication number
- CN109322532A CN109322532A CN201811309120.4A CN201811309120A CN109322532A CN 109322532 A CN109322532 A CN 109322532A CN 201811309120 A CN201811309120 A CN 201811309120A CN 109322532 A CN109322532 A CN 109322532A
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- Prior art keywords
- pole
- transmission line
- power transmission
- line column
- support frame
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
- E04H12/345—Arrangements for tilting up whole structures or sections thereof
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Electric Cable Installation (AREA)
Abstract
A kind of electric hoisting pole of group of vertical power transmission line column, including pole, the bottom of the pole is fixedly installed hoisting mechanism, the hoisting mechanism is for promoting the pole when installing the pole, it further include guiding mechanism, for guiding the pole straight up when promoting the pole, the guiding mechanism is fixed in tower bar the guiding mechanism by fastener, is provided with derricking gear at the top of the pole.The present invention passes through the cooperation between hoisting mechanism and derricking gear, the spatial position for having built the power transmission line column side of completion can be efficiently used, by pole with with dress, avoid because power transmission line column construct with a varied topography or boundary of works area it is smaller due to there is limitation, and only need the work surface of very little, simultaneously, under the guiding function of guiding mechanism, also pole can be made accurately in place, be easy to obstacle avoidance, the generation for reducing safety accident, to reduce power transmission line column in the security risk of mountain area vertical construction.
Description
Technical field
The present invention relates to transmission line construction technical fields, and in particular, to a kind of group is stood the electronic of power transmission line column
Lift by crane pole.
Background technique
Most commonly seen group tower mode is interior suspension external cable group tower mode in power transmission line column vertical construction, mainly sharp
With the power transmission line column tower body stood has been organized, by support system and external cable system, the group for completing power transmission line column is vertical.
Currently, the vertical construction of power transmission line column is again substantially in mountain area ring with the continuous construction of project of transmitting and converting electricity
It is carried out in border.But the group tower mode of interior suspension external cable is in its use process, for external cable in external cable system
Control requirement is extremely stringent, and the terrain environment of mountain area complexity can directly limit the normal use model of external cable in external cable system
It encloses, so that topographic space required for external cable system worked well is insufficient.For example, the landform of mountain area complexity can allow outer drawing
Line is outwardly extending apart from limited, after installing external cable on pole, can not disposably be smoothly completed and be embraced using external cable
Bar is wanted disposably to pacify pole that is, in limited landform in the suspension at power transmission line column tower body truss center using external cable
It is attached to position and belongs to problem in fact, and the fixing end of external cable on the ground can only be fallen with power transmission line column tower body apart from relative close
Region, so that the stress of the fixing end of external cable on the ground is bigger than normal, and the vertical construction of power transmission line column is inevitably
It is easy to influence power transmission line column so that there is biggish construction risk in the construction process using to weight component bigger than normal
Construction personnel personal safety.
Summary of the invention
The object of the invention is that the shortcomings that overcoming the above-mentioned prior art and deficiency, provide a kind of group of vertical power transmission line column
Electric hoisting pole, the inventive structure are biased to Simple automation, and process flow is very simple, passes through hoisting mechanism and lifting
Cooperation between mechanism can efficiently use the spatial position for having built the power transmission line column side of completion, by pole with with
Dress avoids there is limitation because the with a varied topography or boundary of works area of power transmission line column construction is smaller, and only needs the work surface of very little, together
When, under the guiding function of guiding mechanism, also pole can be made accurately in place, be easy to obstacle avoidance, reduce the generation of safety accident,
To reduce power transmission line column in the security risk of mountain area vertical construction.
Technical solution used by the present invention solves the above problems is:
The electric hoisting pole of a kind of group of vertical power transmission line column, including pole, the bottom of the pole are fixedly installed
Hoisting mechanism, the hoisting mechanism further include guiding mechanism for promoting the pole when installing the pole, the guidance
For guiding the pole straight up when promoting the pole, the guiding mechanism is fixed at by fastener for mechanism
In tower bar, derricking gear is provided at the top of the pole, the derricking gear is used to lift by crane when organizing vertical power transmission line column defeated
The branch component of electric line tower；
Wherein, it is provided with connecting plate in the middle part of the hoisting mechanism, row's mounting hole is offered on the connecting plate, it is described
Connecting plate is mounted on pole by the mounting hole, and rotation axis is provided through on the hoisting mechanism, the rotation axis
One end is provided with rotary electric machine, and for rotary electric machine for driving rotation axis to rotate, the other end of the rotation axis is provided with urgent system
Dynamic device, braking equipment of the emergency braking apparatus for cooperating personnel to carry when needing rotation axis emergency braking carry out
Emergency braking, for example, avoiding causing because damage or ageing equipment then need manually to carry out emergency braking when out of control in rotation axis
Great construction accident, thus emergency braking apparatus be it is essential, ropes, the promotion are wound in the rotation axis
One end of rope is fixed in the rotation axis, and the other end insertion of the ropes is arranged in suspension hook fixed plate,
When hoisting mechanism does not need movement, ropes are then wound around on the rotating shaft, are additionally provided with lock in the suspension hook fixed plate
Tight screw, can mount and dismount ropes and suspension hook fixed plate by lock-screw, suspension hook fixed plate under normal conditions
Weight be huge, if when installing pole, ropes and suspension hook fixed plate be not it is separated but integrated, then can
Huge trouble is brought to the installer of pole, or even can make the installation of pole that can not carry out, the suspension hook is fixed
Suspension hook is also welded on plate, it, that is, can be by ropes when needing hoisting mechanism to carry out lifting pole when hoisting mechanism needs to act
Around tie point suitable in tower bar, then suspension hook stabilization is hooked in tower bar, because one end of ropes is to be fixed on
In rotation axis, and the other end is exactly suspension hook end, shrinks ropes by the rotation of control rotation axis, so that it may realize pole
Promotion, detent piece is provided on the suspension hook, the detent piece is movably connected on the suspension hook by detent nail, detent piece
Setting be the case where can preventing suspension hook from falling off when hooking tower bar appearance in order to seal the opening of suspension hook, institute
It states and is additionally provided with emergency alarm lamp and emergency alarm loudspeaker on hoisting mechanism, the emergency alarm lamp and the emergency alarm loudspeaker
Alarm is issued in the hoisting mechanism emergency braking, is prevented accident so as to cause construction personnel's note that can effectively take
The measure of generation, is additionally provided with battery group and controller inside the hoisting mechanism, the controller respectively with rotary electric machine,
The emergency alarm lamp and the emergency alarm loudspeaker are electrically connected, and are additionally provided with communication interface, construction personnel on the controller
Communication interface is connected to by communication line using operation panel, and then controls rotary electric machine, emergency alarm lamp and emergency alarm
Loudspeaker, it is notable that operation panel and controller can only use wired connection, cannot be using being wirelessly connected, because group is vertical
Power transmission line column is carried out under the environment of mountain area mostly, and wireless signal is very poor, it is more likely that is occurred in practical process wireless
The case where signal interruption, and the work for organizing vertical power transmission line column be it is breakneck, equipment is in the process of running because in signal
It is huge for breaking and injuring caused by the construction accident of generation, so can only use wired connection, the electric power storage in this case
Pond group be used for in the hoisting mechanism the unit of electricity consumption in need be powered.
Further, the guiding mechanism is a rectangular frame, and the middle part of each frame of the rectangular frame is equal
Be provided with leading block, and pole is then the middle part for the rectangular frame, pole and leading block sliding contact, but pole with
There is no lateral pressure between leading block, it is generally the case that during pole is promoted, can make because of lateral wobble
Construction system is unstable, if the amplitude of this lateral wobble is excessive, probably will appear construction accident, by leading block
Booster action after so that pole lifting process is more stable, and then guarantee construction safety.
Further, reinforcing rib is welded on the fastener, reinforcing rib can reinforce the stability of fastener, and maintenance is applied
Work is essential safely.
Further, pulley shaft is provided through on the derricking gear, the pulley shaft is equipped with fixed pulley, uses
It in the steel cable of lifting power transmission line column branch component is relied on fixed pulley, the outer end of the derricking gear is provided with detent
Stick prevents steel cable from falling off from outer end, between the fixed pulley and the detent stick can by steel cable, the derricking gear with it is described
Fixed reinforced sheet is also welded between pole, because the supporting power of derricking gear is huge, fixed reinforced sheet is to derricking gear
Reinforcing be essential.
Further, support frame is additionally provided on the pole, support frame as described above includes the first support frame, the second support frame
And stull, the both ends of the stull are respectively welded at the middle part of first support frame and the middle part of second support frame, institute
The inner ring for stating stull, first support frame and second support frame constitutes an equilateral triangle, and equilateral triangle structure makes
Support frame has more stability.
Further, the extension end of first support frame and second support frame is hinged with drag link mechanism, described
Drag link mechanism includes the first pull rod, the second pull rod and pull rod adjuster.
Further, the distance between the fixed pulley and the pole be greater than between the stull and the pole away from
From when the segmentation of steel cable straight down can pass through the region of stull leading portion.
To sum up, the beneficial effects of the present invention are:
Structure of the invention is biased to Simple automation, and process flow is very simple, by between hoisting mechanism and derricking gear
Cooperation, the spatial position for having built the power transmission line column side of completion can be efficiently used, by pole with with dress, avoid because
The with a varied topography or boundary of works area of power transmission line column construction is smaller and there is limitation, and only needs the work surface of very little, meanwhile, it is guiding
Under the guiding function of mechanism, also pole can be made accurately in place, be easy to obstacle avoidance, reduce the generation of safety accident, to reduce
Security risk of the power transmission line column in mountain area vertical construction.
Detailed description of the invention
Fig. 1 is hoisting mechanism structural schematic diagram of the invention.
Fig. 2 is structural schematic diagram of the invention.
Fig. 3 is guiding mechanism structural schematic diagram of the invention.
Fig. 4 is derricking gear structural schematic diagram of the invention.
Wherein, hoisting mechanism 1, pole 2, guiding mechanism 5, fastener 4, tower bar 3, derricking gear 6, connecting plate 105, installation
Hole 106, rotation axis 103, rotary electric machine 102, emergency braking apparatus 104, ropes 101, lock-screw 111, suspension hook are fixed
Plate 109, detent piece 112, detent nail 113, emergency alarm lamp 107, emergency alarm loudspeaker 108, leading block 51, adds suspension hook 110
Strengthening tendons 41, pulley shaft 62, fixed pulley 61, detent stick 64, fixed reinforced sheet 63, the first support frame 71, stull 72, second support
Frame 73, the first pull rod 81, the second pull rod 82, pull rod adjuster 83.
Specific embodiment
External cable can be allowed outwardly extending apart from limited to solve the landform of prior art Zhongshan District complexity, when
After installing external cable on pole, pole can not be disposably smoothly completed at power transmission line column tower body truss center using external cable
Suspension, i.e., in limited landform using external cable want for pole to be disposably installed in place it is real belong to problem, and external cable exists
Fixing end on ground can only fall within the region with power transmission line column tower body apart from relative close, so that external cable is on the ground
The stress of fixing end is bigger than normal, and the vertical construction of power transmission line column inevitably will use weight component bigger than normal, so that
There is biggish construction risk in the construction process, is easy to influence the feelings of the personal safety of the construction personnel of power transmission line column
Condition, structure of the invention are biased to Simple automation, and process flow is very simple, passes through matching between hoisting mechanism and derricking gear
Close, the spatial position for having built the power transmission line column side of completion can be efficiently used, by pole with with dress, avoid because transmission of electricity
The with a varied topography or boundary of works area of route tower construction is smaller and there is limitation, and only needs the work surface of very little, meanwhile, in guiding mechanism
Guiding function under, also pole can be made accurately in place, be easy to obstacle avoidance, reduce the generation of safety accident, to reduce transmission of electricity
Security risk of the route tower in mountain area vertical construction.Below with reference to examples and drawings, further detailed is made to the present invention
Illustrate, embodiments of the present invention are not limited thereto, the example that only present invention applies in figure, to the principle of the present invention
There is no essential constraint.
Embodiment 1:
As depicted in figs. 1 and 2, the electric hoisting pole of a kind of group of vertical power transmission line column, including pole 2, the pole 2
Bottom be fixedly installed hoisting mechanism 1, the hoisting mechanism 1 for promoting the pole 2 when install the pole 2, and also
Including guiding mechanism 5, the guiding mechanism 5 is described to draw for guiding the pole 2 when promoting the pole 2 straight up
It leads mechanism 5 to be fixed in tower bar 3 by fastener 4, the top of the pole 2 is provided with derricking gear 6, the lifting machine
Structure is used to lift by crane the branch component of power transmission line column when organizing vertical power transmission line column；
Wherein, the middle part of the hoisting mechanism 1 is provided with connecting plate 105, and row installation is offered on the connecting plate 105
Hole 106, the connecting plate are mounted on pole by the mounting hole, are provided through rotation axis on the hoisting mechanism 1
103, one end of the rotation axis 103 is provided with rotary electric machine 102, and rotary electric machine is for driving rotation axis to rotate, the rotation
The other end of axis 103 is provided with emergency braking apparatus 104, and emergency braking apparatus when needing rotation axis emergency braking for matching
It closes the braking equipment that staff carries and carries out emergency braking, for example, in rotation axis because when damage or ageing equipment are out of control then
Need manually to carry out emergency braking, avoid causing great construction accident, thus emergency braking apparatus be it is essential, described turn
Ropes 101 are wound on moving axis 103, one end of the ropes 101 is fixed in the rotation axis 103, institute
The other end insertion for stating ropes 101 is arranged in suspension hook fixed plate 109, when hoisting mechanism does not need movement, ropes
It is then wound around on the rotating shaft, is additionally provided with lock-screw 111 in the suspension hook fixed plate 109, it can be with by lock-screw
Ropes and suspension hook fixed plate are mounted and dismounted, the weight of suspension hook fixed plate under normal conditions is huge, if filling
If when pole, ropes and suspension hook fixed plate be not it is separated but integrated, then can be brought to the installer of pole huge
Big trouble, or even can make the installation of pole that can not carry out, it is also welded with suspension hook 110 in the suspension hook fixed plate 109,
It, that is, can be by ropes around suitable in tower bar when needing hoisting mechanism to carry out lifting pole when hoisting mechanism needs to act
Then suspension hook stabilization is hooked in tower bar by tie point because one end of ropes be it is fixed on the rotating shaft, and it is another
End is exactly suspension hook end, shrinks ropes by the rotation of control rotation axis, so that it may realize the promotion of pole, the suspension hook
Detent piece 112 is provided on 110, the detent piece 112 is movably connected on the suspension hook 110 by detent nail 113, detent piece
Setting be the case where can preventing suspension hook from falling off when hooking tower bar appearance in order to seal the opening of suspension hook, institute
It states and is additionally provided with emergency alarm lamp 107 and emergency alarm loudspeaker 108 on hoisting mechanism 1, the emergency alarm lamp 107 and described tight
Anxious alarming horn 108 issues alarm in 1 emergency braking of hoisting mechanism, so as to cause construction personnel's note that can have
Effect takes the measure for generation of preventing accident, and is additionally provided with battery group and controller, the controller inside the hoisting mechanism 1
It is electrically connected respectively with rotary electric machine 102, the emergency alarm lamp 107 and the emergency alarm loudspeaker 108, on the controller also
It is provided with communication interface, construction personnel is connected to communication interface by communication line using operation panel, and then controls rotation electricity
Machine, emergency alarm lamp and emergency alarm loudspeaker, it is notable that operation panel and controller can only use wired connection, no
It can be using being wirelessly connected, because organizing vertical power transmission line column is carried out under the environment of mountain area mostly, wireless signal is very poor, and having very much can
Can there is a situation where wireless signals to interrupt in practical process, and the work for organizing vertical power transmission line column is breakneck, equipment
Injury caused by the construction accident generated in the process of running because of signal interruption is huge, in this case can only
Using wired connection, the battery group be used for in the hoisting mechanism 1 the unit of electricity consumption in need be powered.
Embodiment 2:
When the electric hoisting pole of a kind of group of vertical power transmission line column described in above-described embodiment 1, further such as
Shown in Fig. 3 and Fig. 4, the guiding mechanism 5 is a rectangular frame, is respectively provided in the middle part of each frame of the rectangular frame
Have leading block 51, and pole is then the middle part for the rectangular frame, pole and leading block sliding contact, but pole with lead
To there is no lateral pressure between pulley, it is generally the case that during pole is promoted, can to apply because of lateral wobble
Work system is unstable, if the amplitude of this lateral wobble is excessive, probably will appear construction accident, by leading block
After booster action, so that pole lifting process is more stable, and then guarantee construction safety.
Further, reinforcing rib 41 is welded on the fastener 4, reinforcing rib can reinforce the stability of fastener, dimension
It is essential to protect construction safety.
Further, pulley shaft 62 is provided through on the derricking gear 6, the pulley shaft 62 is equipped with fixed sliding
Wheel 61, the steel cable for lifting by crane power transmission line column branch component is then to rely on fixed pulley, and the outer end of the derricking gear 6 is set
It is equipped with detent stick 64, prevents steel cable from falling off from outer end, it can be described by steel cable between the fixed pulley 61 and the detent stick 64
Fixed reinforced sheet 63 is also welded between derricking gear 6 and the pole 2, because the supporting power of derricking gear is huge, Gu
Determining reinforced sheet is essential to the reinforcing of derricking gear.
Further, support frame is additionally provided on the pole 2, support frame as described above includes the first support frame 71, second
Support 73 and stull 72, the both ends of the stull 72 are respectively welded at the middle part of first support frame 71 and described second and support
The inner ring at the middle part of frame 73, the stull 72, first support frame 71 and second support frame 73 constitutes a positive triangle
Shape, equilateral triangle structure make support frame with more stability.
Further, the extension end of first support frame 71 and second support frame 73 is hinged with drag link mechanism,
The drag link mechanism includes the first pull rod 81, the second pull rod 82 and pull rod adjuster 83.
Further, the distance between the fixed pulley 61 and the pole 2 be greater than the stull 72 and the pole 2 it
Between distance, when the segmentation of steel cable straight down can pass through the region of stull leading portion.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention
Range.
Claims (7)
1. the electric hoisting pole of a kind of group of vertical power transmission line column, including pole (2), which is characterized in that the pole (2)
Bottom is fixedly installed hoisting mechanism (1), and the hoisting mechanism (1) is for promoting the pole when installing pole (2)
It (2), further include guiding mechanism (5), the guiding mechanism (5) when promoting pole (2) for guiding the pole (2) perpendicular
Straight the guiding mechanism (5) is fixed on tower bar (3) by fastener (4) upwards, the top setting of the pole (2)
There are derricking gear (6)；
Wherein, it is provided with connecting plate (105) in the middle part of the hoisting mechanism (1), row peace is offered on the connecting plate (105)
It fills hole (106), is provided through rotation axis (103) on the hoisting mechanism (1), one end of the rotation axis (103) is provided with
The other end of rotary electric machine (102), the rotation axis (103) is provided with emergency braking apparatus (104), the rotation axis (103)
On be wound with ropes (101), one end of the ropes (101) is fixed on the rotation axis (103), described
The other end insertion of ropes (101) is arranged on suspension hook fixed plate (109), also sets up on the suspension hook fixed plate (109)
Have lock-screw (111), be also welded with suspension hook (110) on the suspension hook fixed plate (109), is provided on the suspension hook (110)
Detent piece (112), the detent piece (112) are movably connected on the suspension hook (110) by detent nail (113), the promotion
It is additionally provided with emergency alarm lamp (107) and emergency alarm loudspeaker (108) in mechanism (1), the emergency alarm lamp (107) and described
Emergency alarm loudspeaker (108) issue alarm in the hoisting mechanism (1) emergency braking, also set inside the hoisting mechanism (1)
Be equipped with battery group and controller, the controller respectively with rotary electric machine (102), the emergency alarm lamp (107) and described
Emergency alarm loudspeaker (108) are electrically connected, and communication interface is additionally provided on the controller, and the battery group is used to mention to described
Rise mechanism (1) power supply.
2. the electric hoisting pole of a kind of group according to claim 1 vertical power transmission line column, which is characterized in that described to draw
Leading mechanism (5) is a rectangular frame, is provided with leading block (51) in the middle part of each frame of the rectangular frame.
3. the electric hoisting pole of a kind of group according to claim 1 vertical power transmission line column, which is characterized in that the button
Reinforcing rib (41) are welded on component (4).
4. the electric hoisting pole of a kind of group according to claim 1 vertical power transmission line column, which is characterized in that described
It is provided through on loop wheel machine structure (6) pulley shaft (62), the pulley shaft (62) is equipped with fixed pulley (61), the lifting machine
The outer end of structure (6) is provided with detent stick (64), can be described by steel cable between the fixed pulley (61) and the detent stick (64)
Fixed reinforced sheet (63) are also welded between derricking gear (6) and the pole (2).
5. the electric hoisting pole of a kind of group according to claim 4 vertical power transmission line column, which is characterized in that described armful
Support frame is additionally provided on bar (2), support frame as described above includes the first support frame (71), the second support frame (73) and stull (72),
The both ends of the stull (72) are respectively welded in the middle part and second support frame (73) of first support frame (71)
The inner ring in portion, the stull (72), first support frame (71) and second support frame (73) constitutes an equilateral triangle.
6. the electric hoisting pole of a kind of group according to claim 5 vertical power transmission line column, which is characterized in that described the
The extension end of one support frame (71) and second support frame (73) is hinged with drag link mechanism, and the drag link mechanism includes first
Pull rod (81), the second pull rod (82) and pull rod adjuster (83).
7. the electric hoisting pole of a kind of group according to claim 5 vertical power transmission line column, which is characterized in that described fixed
The distance between pulley (61) and the pole (2) are greater than the distance between the stull (72) and the pole (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811309120.4A CN109322532A (en) | 2018-11-05 | 2018-11-05 | A kind of electric hoisting pole of group of vertical power transmission line column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811309120.4A CN109322532A (en) | 2018-11-05 | 2018-11-05 | A kind of electric hoisting pole of group of vertical power transmission line column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109322532A true CN109322532A (en) | 2019-02-12 |
Family
ID=65260088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811309120.4A Pending CN109322532A (en) | 2018-11-05 | 2018-11-05 | A kind of electric hoisting pole of group of vertical power transmission line column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109322532A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997430A (en) * | 2020-08-10 | 2020-11-27 | 安徽送变电工程有限公司 | High tower for line crossing in construction of extra-high voltage transmission line and assembling method thereof |
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| EP2715034B1 (en) * | 2011-06-02 | 2018-07-18 | National Oilwell Varco, L.P. | Drilling rig system with self-elevating drill floor |
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| EP2715034B1 (en) * | 2011-06-02 | 2018-07-18 | National Oilwell Varco, L.P. | Drilling rig system with self-elevating drill floor |
| AU2013228093A1 (en) * | 2012-03-06 | 2014-10-23 | Itrec B.V. | Modular drilling rig system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111997430A (en) * | 2020-08-10 | 2020-11-27 | 安徽送变电工程有限公司 | High tower for line crossing in construction of extra-high voltage transmission line and assembling method thereof |
| CN111997430B (en) * | 2020-08-10 | 2021-07-30 | 安徽送变电工程有限公司 | High tower for line crossing in construction of extra-high voltage transmission line and assembling method thereof |
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