CN207131536U - A kind of tower frame for wind generating set lift maintenance platform system - Google Patents
A kind of tower frame for wind generating set lift maintenance platform system Download PDFInfo
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- CN207131536U CN207131536U CN201721018865.6U CN201721018865U CN207131536U CN 207131536 U CN207131536 U CN 207131536U CN 201721018865 U CN201721018865 U CN 201721018865U CN 207131536 U CN207131536 U CN 207131536U
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- alignment sensor
- generating set
- wind generating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
Abstract
The utility model discloses a kind of tower frame for wind generating set lift maintenance platform system, bottom platform and top platform are provided with pylon；Executing agency, including the operation guide rail being fixedly installed between top platform and bottom platform, and the hoistable platform being movably connected on operation guide rail；Drive device, including motor and driving steel wire rope, the output shaft of motor is by driving steel wire rope to be connected with hoistable platform；Supervising device, including top alignment sensor and bottom alignment sensor, top alignment sensor and bottom alignment sensor are used to detect the position of hoistable platform；Control unit, including main control module and manual control module, main control module is connected with motor, manual control module, top alignment sensor and bottom alignment sensor, for controlling motor start and stop.The tower frame for wind generating set lift maintenance platform system, can according to the start and stop at an arbitrary position of O＆M demand, and can automatic lifting, it is simple in construction, it is easy to use.
Description
Technical field
Wind turbines maintenance technology field is the utility model is related to, is tieed up more particularly to a kind of tower frame for wind generating set lift
Protect plateform system.
Background technology
Installed with a large amount of research and development of high-power and ultralow wind speed Wind turbines, blower fan pylon height and diameter also constantly rise
High and increasing, and tower frame for wind generating set form also becomes more diverse, such as split blade type and concrete type, the scene of Wind turbines
Maintenance work amoun dramatically increases.Because high-power megawatt-level wind set tower frame is high, operation maintenance personnel to enter cabin and pylon is opened
Open up upkeep operation, it is necessary to a large amount of muscle power climbings are expended, Wind turbines maintenance platform is all integrally fixed at original design height at present,
It can not complete to safeguard pylon in the arbitrary height without position of platform.
The position of hard cable cable trough is longitudinal arrangement from top to bottom, although its Position Design is nearer from cat ladder, fortune
Dimension personnel are maintained on cat ladder still certain difficulty, also there is very big potential safety hazard.On the other hand with increasingly
Diversified tower frame for wind generating set form, as split blade type pylon and each height and position of concrete tower have crab-bolt and bolt,
Although being all non-maintaining bolt or crab-bolt, because wind power generating set waves, vibrates etc. it is unavoidable occur bolt looseness or
Phenomenon is damaged, and present platform can not complete the maintenance work to it.
Therefore, how to found one kind can according to the start and stop at an arbitrary position of O＆M demand, and can automatic lifting wind-powered electricity generation
Set tower frame lift maintenance platform, turns into current urgent problem to be solved.
Utility model content
The purpose of this utility model is to provide one kind can be according to the start and stop at an arbitrary position of O＆M demand, and can rise automatically
The tower frame for wind generating set lift maintenance platform of drop, to overcome existing Wind turbines maintenance platform to be all integrally fixed at original design
Highly, the deficiency safeguarded to pylon in the arbitrary height without position of platform can not be completed.
To achieve the above object, the utility model adopts the following technical scheme that：
A kind of tower frame for wind generating set lift maintenance platform system, the pylon is interior to be provided with bottom platform and top platform,
Including executing agency, drive device, supervising device and control unit；The executing agency, including it is fixedly installed on the top
Operation guide rail between platform and bottom platform, and the hoistable platform being movably connected on the operation guide rail；The driving
Device, including motor and driving steel wire rope, the output shaft of the motor pass through the driving steel wire rope and the liter
Platform connection is dropped；The supervising device, including top alignment sensor and bottom alignment sensor, the top alignment sensor
It is used to detect the position of the hoistable platform with bottom alignment sensor；Described control unit, including main control module and hand
Dynamic control module, the main control module position with the motor, manual control module, top alignment sensor and bottom
Sensor connects, for the instruction according to the manual control module and the top alignment sensor received and bottom
The lifting platform position information of portion's alignment sensor collection, controls the motor start and stop.
As a kind of improvement of the present utility model, the output shaft of the motor is connected with traction sheave, and the bottom is put down
Platform is provided with the deflecting roller corresponding with the traction sheave, the driving steel wire rope around being connected between the traction sheave and deflecting roller,
The hoistable platform is fixedly connected with the driving steel wire rope.
Further improve, the drive device also includes platform hanging beam, and the platform hanging beam is arranged on the top platform
Bottom, the motor be arranged on the platform hanging beam above.
Further improve, the quantity of the operation guide rail is two, and two operation guide rails are with the axle center of the pylon
Line is symmetrical arranged centered on line；The quantity of the motor is two, and two motors are respectively by driving steel wire
Rope is connected with the hoistable platform, and also line is symmetrical arranged two driving steel wire ropes centered on the axial line of the pylon；
The plane that the plane that two operation guide rails are formed is formed perpendicular to two driving steel wire ropes.
Further improve, be provided with guide groove on the operation guide rail, the hoistable platform is provided with and the guide groove
Corresponding pulley, the hoistable platform is coordinated by the pulley and guide groove to be movably connected on the operation guide rail.
Further improve, fall arrest retaining mechanism is additionally provided with the operation guide rail.
Further improve, the top alignment sensor and bottom alignment sensor are arranged at leading for the operation guide rail
In track slot, and coordinate the position for detecting the hoistable platform with the pulley.
Further improve, the quantity of the top alignment sensor and bottom alignment sensor is two.
Further improving, the hoistable platform includes top plate and bottom plate, connected between the top plate and bottom plate by guardrail,
Open top and bottom opening are respectively arranged with the top plate and bottom plate, is set respectively in the top platform and bottom platform
There are the top cat ladder and bottom cat ladder corresponding with the open top and bottom opening.
Further improve, described control unit also includes remote control module, the main control module and the remote control module without
Line connects, and the main control module is additionally operable to control the motor start and stop according to the instruction of the remote control module；Described
In main control module, the information priorities of top alignment sensor and bottom the alignment sensor transmission are higher than the control manually
The command information of molding block, the command information priority of the manual control module are higher than the command information of the remote control module.
Due at least there is advantages below using above-mentioned technical proposal, the utility model：
1st, tower frame for wind generating set lift maintenance platform system of the present utility model, main control module, manually control are passed through
The cooperation control motor start and stop of module, top alignment sensor and bottom alignment sensor, it is possible to achieve hoistable platform root
According to the start and stop at an arbitrary position of O＆M demand, and can automatic lifting, it is simple in construction, it is easy to use.
The 2nd, platform hanging beam is set, the gravity of the devices such as hoistable platform, motor can be made uniformly to act on top horizontal
On platform, avoid local pressure is excessive from causing top platform to be damaged.
The 3rd, hoistable platform is arranged to include to the car of top plate and bottom plate makes structure, and operation maintenance personnel can be prevented by falling object from high altitude
Hindered, connected between top plate and bottom plate by guardrail, be easy to operation maintenance personnel to stretch out maintenance of equipment or arm pair from guardrail
Pylon is safeguarded.
4th, coordinated by two operation guide rails and two driving steel wire ropes, hoistable platform can be made to be swung in the same direction with pylon,
Avoid hoistable platform from hitting pylon, and set two motors to be beneficial to the load-carrying for improving hoistable platform, and can keep away
Exempt from that dangerous situation occurs because a motor breaks down.
5th, two top alignment sensors and bottom alignment sensor, are mutually redundant, and avoid because alignment sensor failure is sent out
The raw dangerous situation rushed to summit or hit bottom platform.
6th, by setting remote control module, it is possible to achieve the remote control lift of hoistable platform, manipulation are convenient.
Brief description of the drawings
Above-mentioned is only the general introduction of technical solutions of the utility model, in order to better understand technology hand of the present utility model
Section, below in conjunction with accompanying drawing, the utility model is described in further detail with embodiment.
Fig. 1 is that the hoistable platform in the utility model tower frame for wind generating set lift maintenance platform system is located at tower bottom
When structural representation；
Fig. 2 is that the hoistable platform in the utility model tower frame for wind generating set lift maintenance platform system is located at tower top
When structural representation；
Fig. 3 is the part-structure schematic diagram of the utility model tower frame for wind generating set lift maintenance platform system；
Wherein, 1, pylon, 2, bottom platform, 3, turn round cable platform, 4, hoistable platform, 5, operation guide rail, 6, motor, 7,
Drive steel wire rope, 8, top cat ladder, 9, bottom cat ladder.
Embodiment
Referring to shown in Fig. 1 to Fig. 3, tower frame for wind generating set lift maintenance platform system of the present utility model, including driving
Device, executing agency, supervising device and control unit, can according to the start and stop at an arbitrary position of O＆M demand, and can automatic lifting,
It is simple in construction, it is easy to use.
Specifically, the top and bottom of pylon 1 are respectively arranged with top platform and bottom platform 2, top platform is usually
Platform is reversed, the present embodiment illustrates exemplified by reversing platform to the technical solution of the utility model.
Drive device includes platform hanging beam, motor 6, traction sheave, driving steel wire rope 7, deflecting roller and tensioning apparatus；It is flat
Platform hanging beam is arranged on the bottom for reversing platform, and motor 6 is arranged on above platform hanging beam, and motor 6 is using right angle
Reducing motor, it can be rotated with forward and reverse, the output shaft of right-angle reduction motor is connected with traction sheave, and deflecting roller is arranged on bottom
On platform 2 and corresponding with traction sheave, driving steel wire rope 7 is around being connected between traction sheave and deflecting roller, and driving steel wire rope 7 is at right angle
It can be moved under the driving of reducing motor between traction sheave and deflecting roller.Tensioning apparatus is set close to traction sheave, for being tensioned
Drive steel wire rope 7.Drive device, which can also use, includes platform hanging beam, motor 6, capstan winch, the technical side for driving steel wire rope 7
Case, motor 6 can be such as similarly installed on platform hanging beam, the output shaft of motor 6 is connected with capstan winch, drives steel wire rope
7 one end with around being connected on capstan winch, the other end is connected with hoistable platform 4.
Executing agency includes operation guide rail 5 and hoistable platform 4, and operation guide rail 5 is axially arranged along pylon 1, is fixedly connected on
Between bottom platform 2 and torsion cable platform 3.It is axially disposed on operation guide rail 5 to have guide groove, it is provided with and leads on hoistable platform 4
The corresponding pulley of track slot, pulley are slidably connected in guide groove, and hoistable platform 4 is engaged activity even by pulley and guide groove
It is connected on operation guide rail 5, hoistable platform 4 is also fixedly connected with driving steel wire rope 7, and motor 6 is by driving steel wire rope 7 to drive
Hoistable platform 4 realizes lifting.
Preferably, two operation guide rails 5, two operation guide rails 5 line centered on the axial line of pylon 1 can be set
It is symmetrical arranged, while two motors 6 is set, two motors 6 is respectively by driving steel wire rope 7 to connect with hoistable platform 4
Connect, also line is symmetrical arranged two driving steel wire ropes 7 centered on the axial line of pylon 1, the plane that two operation guide rails 5 are formed
The plane formed perpendicular to two driving steel wire ropes 7.Coordinated by two operation guide rails 5 and two driving steel wire ropes 7, can be with
Hoistable platform 4 is swung in the same direction with pylon, avoid hoistable platform 4 from hitting pylon 1, and set two motors 6 to be beneficial to
The load-carrying of hoistable platform 4 is improved, and can avoid that dangerous situation occurs because breaking down a motor 6.
In addition, fall arrest retaining mechanism is additionally provided with the operation guide rail 5, when the decrease speed of hoistable platform 4 reaches default
During threshold value, fall arrest retaining mechanism can stuck hoistable platform 4, prevent it from further falling, protect the personal safety of operation maintenance personnel.
For the personal safety of further protection operation maintenance personnel, operation maintenance personnel is prevented to be hindered by falling object from high altitude, the hoistable platform 4
Using car type structure, including top plate and bottom plate, connected between top plate and bottom plate by guardrail, in order to which operation maintenance personnel will can be tieed up
Equipment or arm is repaiied to safeguard pylon 1 from guardrail stretching.Open top is respectively arranged with top plate and bottom plate and bottom is opened
Mouthful, turn round and be respectively arranged with the top cat ladder 8 corresponding with open top and bottom opening and bottom in cable platform 3 and bottom platform 2
Portion's cat ladder 9, when hoistable platform 4 rises to 1 top of pylon, top cat ladder 8 is extend into hoistable platform 4 from open top, fortune
Dimension personnel can be climbed up by top cat ladder 8 turns round cable platform 3, and when hoistable platform 4 drops to 1 bottom of pylon, bottom cat ladder 9 is the bottom of from
Portion's opening is extend into hoistable platform 4, operation maintenance personnel can by under bottom cat ladder 9 in bottom platform 2.
Supervising device includes top alignment sensor and bottom alignment sensor, and top alignment sensor and bottom positioning pass
Sensor is separately positioned on operation guide rail 5 close to top and the position of bottom, for detecting the position of hoistable platform 4.For example, can
Top alignment sensor and bottom alignment sensor are arranged in the guide groove of operation guide rail 5, can be by hoistable platform 4
Pulley triggering top alignment sensor and bottom alignment sensor, to identify the position of hoistable platform 4.Preferably, may be used
Two sets of top alignment sensors and bottom alignment sensor are set, is separately positioned on two operation guide rails 5, is mutually redundant, keeps away
Exempt from because alignment sensor failure leads to not the position of identification hoistable platform 4.
Control unit includes main control module, manual control module and remote control module, and main control module is electric with driving respectively
Machine 6 and manual control module electrical connection, and it is wireless with remote control module, top alignment sensor and bottom alignment sensor respectively
Connection.Active control module is used for instruction and top alignment sensor and bottom according to manual control module and remote control module
The positional information of the hoistable platform 4 of portion's alignment sensor collection, controls the start and stop of motor 6, to realize the automatic of hoistable platform 4
Lifting.Wherein, top alignment sensor and the information priorities of bottom alignment sensor transmission are higher than the finger of manual control module
Information is made, the command information priority of manual control module is higher than the command information of remote control module.
Coordinate shown in Fig. 1 and Fig. 2, the operation principle of the utility model tower frame for wind generating set lift maintenance platform system is such as
Under：
The pylon lift maintenance platform mainly includes four kinds of operating modes when using：Control rises to torsion to hoistable platform 4 manually
The operating mode of cable platform 3, hoistable platform 4 manually control drop to the operating mode of bottom platform 2, it is middle stop carrying out pylon 1 safeguard operating mode and
The remote control of hoistable platform 4, which rises to, turns round the operating mode of cable platform 3.Four kinds of operating modes correspond to respectively：Hoistable platform 4 rises to torsion from starting platform
Operation maintenance personnel enters cabin progress upkeep operation after the position of cable platform 3 stops；Hoistable platform 4 drops to from the position of cable platform 3 is turned round
Operation maintenance personnel leaves pylon 1 after bottom platform 2；Hoistable platform 4 rises to arbitrary height position operation maintenance personnel and carries out upkeep operation；
And operation maintenance personnel is left to rise to the remote control of hoistable platform 4 after hoistable platform 4 and turns round four kinds of 3 position of cable platform situation, divides below
Do not mentionlet alone bright.
Hoistable platform 4, which controls to rise to manually, turns round the operating mode of cable platform 3, in the uphill process of hoistable platform 4, selects control manually
Pattern, operation maintenance personnel control manual control module, triggers climb command, remote control module does not work；Main control module is according to hand
Climb command in dynamic control module, start right-angle reduction motor, the rotation of right-angle reduction motor driven traction sheave, make hoistable platform
4 rise along operation guide rail 5, when rising to torsion cable 3 position of platform, trigger two top positioning close to operation guide rail 5 top
Any one in sensor, top alignment sensor will collect the position signalling of hoistable platform 4 and send to main control module, master control
Molding block control motor 6 is out of service, and hoistable platform 4 stops.
Control drops to the operating mode of bottom platform 2 to hoistable platform 4 manually, during hoistable platform 4 declines, selects control manually
Pattern, triggering decline instruction, and remote control does not work；Main control module instructs according to the decline of manual control module, starts right angle
Reducing motor rotates, right-angle reduction motor driven traction disk counter-rotating, declines the operation of hoistable platform 4, drops to bottom and put down
During 2 position of platform, any one in two bottom alignment sensors of close operation guide rail 5 bottom, bottom alignment sensor are triggered
The position signalling of hoistable platform 4 collected is sent to main control module, main control module control motor 6 is out of service,
Hoistable platform 4 stops.
Centre stops progress pylon 1 and safeguards operating mode, and hoistable platform 4 selects control manually in running is risen or fallen
Molding formula, triggering rises, decline or halt instruction, remote control do not work；Main control module is according to upper in manual control module
Liter, decline or halt instruction, hoistable platform 4 can be parked in bottom platform 2 with turning round the arbitrary height position among cable platform 3 to tower
Frame 1 and interior annex carry out upkeep operation.For convenience of power taking during upkeep operation, 2 holes and 3 can be filled every 5 meter amperes on the inwall of pylon 1
Each one of spring hole scoket.
The remote control of hoistable platform 4, which rises to, turns round the position operating mode of cable platform 3, drops to bottom platform 2 having performed hoistable platform 4
After operating mode, hoistable platform 4 is selected as remote control mode, after operation maintenance personnel reaches bottom platform 2, passes through remote control module triggering and rises
Instruction, hoistable platform 4 is risen to automatically and turn round the position of cable platform 3, only need to trigger decline by remote control module when next time uses refers to
Order, is automatically lowered starting platform position.
Tower frame for wind generating set lift maintenance platform system of the present utility model, uses manual control module and master control molding
Block controls motor start and stop, realizes hoistable platform and starts at an arbitrary position and automatic lifting, by pacifying on operation guide rail
Anti-falling mechanism is filled, hoistable platform falling from high altitude can be prevented, by setting top alignment sensor and bottom alignment sensor,
Hoistable platform can be avoided to rush to summit or hit bottom.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is made any formal
Limitation, those skilled in the art make a little simple modification, equivalent variations or modification using the technology contents of the disclosure above,
Fall in the scope of protection of the utility model.
Claims (10)
1. a kind of tower frame for wind generating set lift maintenance platform system, the pylon is interior to be provided with bottom platform and top platform, its
It is characterised by, including executing agency, drive device, supervising device and control unit；
The executing agency, including the operation guide rail being fixedly installed between the top platform and bottom platform, and activity
The hoistable platform being connected on the operation guide rail；
The drive device, including motor and driving steel wire rope, the output shaft of the motor pass through the driving steel
Cord is connected with the hoistable platform；
The supervising device, including top alignment sensor and bottom alignment sensor, the top alignment sensor and bottom
Alignment sensor is used to detect the position of the hoistable platform；
Described control unit, including main control module and manual control module, the main control module and the motor, hand
Dynamic control module, top alignment sensor and the connection of bottom alignment sensor, for the instruction according to the manual control module,
And the lifting platform position information of the top alignment sensor and bottom the alignment sensor collection received, control
The motor start and stop.
2. tower frame for wind generating set lift maintenance platform system according to claim 1, it is characterised in that the driving electricity
The output shaft of machine is connected with traction sheave, and the bottom platform is provided with the deflecting roller corresponding with the traction sheave, the driving steel
Around being connected between the traction sheave and deflecting roller, the hoistable platform is fixedly connected cord with the driving steel wire rope.
3. tower frame for wind generating set lift maintenance platform system according to claim 2, it is characterised in that the driving dress
Putting also includes platform hanging beam, and the platform hanging beam is arranged on the bottom of the top platform, and the motor is arranged on described
Above platform hanging beam.
4. tower frame for wind generating set lift maintenance platform system according to claim 3, it is characterised in that the operation is led
The quantity of rail is two, and two operation guide rail lines centered on the axial line of the pylon are symmetrical arranged；The driving electricity
The quantity of machine is two, and two motors are respectively by driving steel wire rope to be connected with the hoistable platform, described in two
Driving steel wire rope, also line is symmetrical arranged centered on the axial line of the pylon；The plane that two operation guide rails are formed is hung down
The plane directly formed in two driving steel wire ropes.
5. the tower frame for wind generating set lift maintenance platform system according to claim any one of 1-4, it is characterised in that institute
State and be provided with guide groove on operation guide rail, the hoistable platform is provided with the pulley corresponding with the guide groove, the lifting
Platform is coordinated by the pulley and guide groove to be movably connected on the operation guide rail.
6. tower frame for wind generating set lift maintenance platform system according to claim 5, it is characterised in that the operation is led
Fall arrest retaining mechanism is additionally provided with rail.
7. tower frame for wind generating set lift maintenance platform system according to claim 5, it is characterised in that determine at the top
Level sensor and bottom alignment sensor are arranged in the guide groove of the operation guide rail, and coordinate detection institute with the pulley
State the position of hoistable platform.
8. tower frame for wind generating set lift maintenance platform system according to claim 7, it is characterised in that determine at the top
The quantity of level sensor and bottom alignment sensor is two.
9. tower frame for wind generating set lift maintenance platform system according to claim 1, it is characterised in that the lifting is flat
Platform includes top plate and bottom plate, is connected between the top plate and bottom plate by guardrail, and top is respectively arranged with the top plate and bottom plate
Portion's opening and bottom opening, it is respectively arranged with and the open top and bottom opening phase on the top platform and bottom platform
Corresponding top cat ladder and bottom cat ladder.
10. tower frame for wind generating set lift maintenance platform system according to claim 1, it is characterised in that the control
Unit also includes remote control module, and the main control module and the remote control module wireless connection, the main control module are additionally operable to
The motor start and stop are controlled according to the instruction of the remote control module；
In the main control module, the information priorities of top alignment sensor and bottom the alignment sensor transmission are higher than
The command information of the manual control module, the command information priority of the manual control module is higher than the remote control module
Command information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721018865.6U CN207131536U (en) | 2017-08-15 | 2017-08-15 | A kind of tower frame for wind generating set lift maintenance platform system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721018865.6U CN207131536U (en) | 2017-08-15 | 2017-08-15 | A kind of tower frame for wind generating set lift maintenance platform system |
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| Publication Number | Publication Date |
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| CN207131536U true CN207131536U (en) | 2018-03-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269476A (en) * | 2017-08-15 | 2017-10-20 | 国电联合动力技术有限公司 | A kind of tower frame for wind generating set lift maintenance platform system |
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2017
- 2017-08-15 CN CN201721018865.6U patent/CN207131536U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269476A (en) * | 2017-08-15 | 2017-10-20 | 国电联合动力技术有限公司 | A kind of tower frame for wind generating set lift maintenance platform system |
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