CN108178073A - A kind of station Universal hoisting equipment - Google Patents
A kind of station Universal hoisting equipment Download PDFInfo
- Publication number
- CN108178073A CN108178073A CN201810014214.2A CN201810014214A CN108178073A CN 108178073 A CN108178073 A CN 108178073A CN 201810014214 A CN201810014214 A CN 201810014214A CN 108178073 A CN108178073 A CN 108178073A
- Authority
- CN
- China
- Prior art keywords
- movable pulley
- fixed
- suspension hook
- disconnecting switch
- column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000725 suspension Substances 0.000 claims abstract description 29
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000010301 surface-oxidation reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000003028 elevating effect Effects 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910052573 porcelain Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
- B66C23/166—Simple cranes with jibs which may be fixed or can slew or luff
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
- B66C23/365—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes dismantable into smaller units for transport purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/84—Slewing gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
- B66D3/08—Arrangements of sheaves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The present invention relates to substation equipment service technique field more particularly to a kind of station Universal hoisting equipment.Including sequentially connected hanging apparatus, rotating device, column and pedestal from top to bottom, disconnecting switch special hanger is further included, hanging apparatus can be around the 360 ° of horizontal rotations of column axis；Hanging apparatus includes arm and front and rear preceding suspension hook frame, movable pulley rack, swivel mount and the hanging hoist engine being sequentially fixed on arm, further include movable pulley, fixed pulley and suspension hook, fixed pulley is fixed in movable pulley rack, movable pulley is mounted on the steel wire rope between movable pulley rack and preceding suspension hook frame, suspension hook is fixed below movable pulley, and disconnecting switch special hanger is hung on suspension hook；The rotation of hanging hoist engine drives hook lifting.It is versatile, it is mountable on the 66kV disconnecting switch frameworks of substation's form of ownership arrangement；It is light-weight, suitable for working at height；Assembling is flexible and convenient, and elevating capacity is strong；Available for recovery vehicle；Improve disconnecting switch lifting efficiency.
Description
Technical field
The present invention relates to substation equipment service technique field more particularly to a kind of station Universal hoisting equipment.
Background technology
At present, substation equipment overhauls, especially substation isolating-switch Disintegration overhaul or integral replacing operation, need by
Old disconnecting switch is hung oneself down from framework, and the disconnecting switch after maintenance or new disconnecting switch are lifted on framework.Application should at present
The first is to utilize hand mode, but limited by manpower to the hanging device of operation, can only lift the single-column of each every time；Second
It is that the power of lifting is changed to motor, lifting weight has certain promotion, but operates and assemble relatively complicated.
In addition it there is problems in application process：
1st, installation is confined to the GW5 type disconnecting switch on 2.5 meters high conventional framework arrangement (channel steel or angle steel basis), right
In the disconnecting switch (being such as installed on the gate framework of 8.5 meters and above height) that upper and lower layer arrangement, eminence are arranged, can not realize
Installation；Mounted on any one position, it can not achieve and three-phase isolation switch lifted；
2nd, it in lifting operation, due to falling arm lengths deficiency, at least needs architecturally to install twice；
3rd, hanging device preponderance for the disconnecting switch of eminence arrangement, is carried and is assembled up and down and is extremely difficult.
At present, in construction of transformer substation operation, crane operation is still relied on for the lighter equipment of part mass, but is become
Power station part clearance space is limited, keeps safe enough distance with charging equipment to ensure, it has to expand job area.
Invention content
In order to make up for the deficiencies of the prior art, the present invention provides a kind of versatile, easy to assembly, efficient substation
Overhaul Universal hoisting equipment.Meets the needs of disconnecting switch is with below 200Kg substation equipment lifting operations.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of station Universal hoisting equipment including sequentially connected hanging apparatus from top to bottom, rotating device, is stood
Column and pedestal, further include disconnecting switch special hanger, and hanging apparatus can be around the 360 ° of horizontal rotations of column axis；The hanging apparatus
Including arm and front and rear preceding suspension hook frame, movable pulley rack, swivel mount and the hanging hoist engine being sequentially fixed on arm, also wrap
Movable pulley, fixed pulley and suspension hook are included, fixed pulley is fixed in movable pulley rack, and movable pulley is mounted on movable pulley rack and preceding suspension hook frame
Between steel wire rope on, suspension hook is fixed below movable pulley, and disconnecting switch special hanger is hung on suspension hook；Hanging hoist engine rotates
Drive hook lifting.
The rotating device includes rotary shaft, bearing, bearing block and positioning pin；Bearing block is fixed on column top, axis
It holds on bearing block, rotary shaft is mounted on bearings, and swivel mount bottom is fixed on rotary shaft top.
The circumferentially uniformly distributed multiple location holes of the rotary shaft, rotary shaft are circumferentially fixed with positioning pin by location hole.
The pedestal includes upper bed-plate and lower bottom base；Upper bed-plate center is equipped with cylinder, and barrel bore is equal to column outer diameter；On
Pedestal is bolted with lower bottom base.
The column is tubular, and bottom is equipped with lock hole, after column bottom is inserted into the cylinder of upper bed-plate, passes through lock hole
And locking pin is fixed.
The disconnecting switch special hanger is cross structure, and crossbeam both ends are equipped with fastening lockset, are equipped with and hang at the top of vertical beam
Ring, bottom are set there are two rope sling.
The arm is equipped with multigroup movable pulley rack mounting hole, and the distance between movable pulley rack and preceding suspension hook frame are adjustable.
The arm and column are made of high-strength aluminum alloy material, surface oxidation plated film.
Compared with prior art, the beneficial effects of the invention are as follows：
1) it after upper bed-plate is clipped in lower bottom base on disconnecting switch framework, is bolted and then mounted on disconnecting switch structure
On frame；Versatility is good, can be installed on the 66kV disconnecting switch frameworks of substation's form of ownership arrangement.
2) hanging apparatus, rotating device, column and pedestal are separate structure；It is easy to transportation and installation, it is light-weight, have more
Flexible assembling mode assembles convenient for eminence；It disclosure satisfy that after a little installing, realize three-phase isolation switch lifting.
3) for different device heights, the column of different height can be selected；Realize hanging for substation's lightweight device
Dress；
4) it is lifted using movable pulley, improves the elevating capacity of hanging device.
5) the appropriate welded and installed angle bar on repairing lorry, the present invention can be fixed on repairing lorry, available for repairing
Vehicle lifts large piece article, mitigates repair personnel's working strength.
6) the special auxiliary lifting appliance of disconnecting switch, lifting is convenient, does not depend on hoisting personnel's experience, during lifting, disconnecting switch by
Power is similar to " being embraced ", prevent because lifting it is fixed it is improper fall or porcelain knob is broken, improve work efficiency and safety.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the A of Fig. 1 to enlarged drawing；
Fig. 3 is disconnecting switch special hanger structure diagram of the present invention；
Fig. 4 is disconnecting switch special hanger working state schematic representation of the present invention；
Fig. 5 is working state schematic representation of the present invention；
Fig. 6 is travel position schematic diagram of the present invention.
In figure：Suspension hook before 1- hanging apparatus 2- rotating device 3- column 4- pedestal 5- disconnecting switch special hanger 6- arms 7-
Frame 8- movable pulley rack 9- swivel mount 10- hanging hoist engine 11- movable pulley 12- fixed pulley 13- suspension hook 14- steel wire rope 15- rotary shafts
16- bearing 17- bearing block 18- positioning pin 19- location hole 20- upper bed-plate 21- lower bottom base 22- cylinder 23- lock hole 24- locking pins
25- fastening lockset 26- hanging ring 27- rope sling 28- movable pulley rack mounting hole 29- disconnecting switch framework 30-GW5 type disconnecting switch 31-
Repair lorry
Specific embodiment
The specific embodiment of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of station Universal hoisting equipment, including hanging apparatus 1, rotating device 2,3 and of column
Pedestal 4 further includes disconnecting switch special hanger 6.Hanging apparatus 1, rotating device 2, column 3 and pedestal 4 and disconnecting switch are special
It is separate structure with suspender 6, can individually transports Assembling.Column 3 is mounted on pedestal 4, and rotating device 2 is mounted on column 3
On, hanging apparatus 1 is mounted on rotating device 2, and hanging apparatus 1 can be around 3 axis of column, 360 ° of horizontal rotations.
Hanging apparatus 1 including arm 6 and front and rear pass sequentially through preceding suspension hook frame 7 that bolt is fixed on arm 6, dynamic slides
Wheel carrier 8, swivel mount 9 and hanging hoist engine 10 further include movable pulley 11, fixed pulley 12 and suspension hook 13.Arm 6 is using high-strength
It spends aluminum alloy materials to make, surface oxidation plated film.6 length 1800mm of arm, 9 mounting hole of swivel mount of arm 6 to 6 front end of arm
1500mm.Arm 6 is equipped with multigroup movable pulley rack mounting hole 28, and the distance between movable pulley rack 8 and preceding suspension hook frame 7 are adjustable.
Hanging hoist engine 10 uses CD1 type wireless remote control hanging hoist engines, rated load weight 500kg, net weight 150kg, rope capacity
More than 12M.
Fixed pulley 12 is fixed in movable pulley rack 8, and the steel wire rope 14 of hanging hoist engine 10 around fixed pulley 12, fix by end
On preceding suspension hook frame 7.Movable pulley 11 is mounted on the steel wire rope 14 between movable pulley rack 8 and preceding suspension hook frame 7, and suspension hook 13 is fixed on
11 lower section of movable pulley, disconnecting switch special hanger 5 are hung on suspension hook 13.The rotation of hanging hoist engine 10 drives suspension hook 13 together with isolation
Switch one lifting of special hanger 5 and disconnecting switch.Arm 6 be equipped with multigroup movable pulley rack mounting hole 28, movable pulley rack 8 with
The distance between preceding suspension hook frame 7 is adjustable, and then facilitates the different types of equipment of lifting, convenient for lifting operation.
Rotating device 2 as shown in Figure 2 includes rotary shaft 15, bearing 16, bearing block 17 and positioning pin 18.Bearing block 17 is solid
3 top of column is scheduled on, bearing 16 is mounted on bearing block 17, and rotary shaft 15 is mounted on bearing 16, and swivel mount 9 is fixed on rotation
15 top end surface of axis, and then hanging apparatus 1 and rotary shaft 15 can facilitate adjustment lifting angle around 3 axis of column, 360 ° of horizontal rotations
Degree.The circumferential uniformly distributed multiple location holes 19 of rotary shaft 15, rotary shaft 15 is circumferentially fixed by location hole 19 and positioning pin 18, adjusts
After lifting angle, positioning pin 18 is inserted into location hole 19 can be circumferentially fixed by hanging apparatus 1, prevents its rotation.
As shown in Figure 1, pedestal 4 includes upper bed-plate 20 and lower bottom base 21；20 center of upper bed-plate is equipped with cylinder 22, in cylinder 22
Diameter is equal to 3 outer diameter of column；Upper bed-plate 20 is bolted with lower bottom base 21.4 length of pedestal is kept apart than existing GW5/GW4 types
Close the long 80mm of width of framework and 66kV gate angle bar frameworks, bolt length be longer than existing GW5/GW4 types disconnecting switch framework and
The main iron thickness 80mm of 66kV gate angle bar frameworks.
Column 3 is tubular, long 1550mm or 1850mm.Its bottom is evenly distributed with 4 lock holes 23, and upper bottom is inserted into 3 bottom of column
In the cylinder 22 of seat 20, then fixed by lock hole 23 and locking pin 24.Column 3 uses high-strength aluminum alloy material system
Make, surface oxidation plated film.
As shown in Figure 3, Figure 4, the disconnecting switch special hanger 5 is cross structure, and crossbeam both ends are equipped with fastening lockset
25, it is equipped with hanging ring 26 at the top of vertical beam, bottom sets that there are two rope slings 27.Rope sling 27 is fixed on the pedestal of GW5 types disconnecting switch 30,
Both ends fastening lockset 25 fixes two porcelain knobs of GW5 types disconnecting switch 30, and then GW5 types disconnecting switch 30 is firmly fixed on
On disconnecting switch special hanger 5.
As shown in Figure 1, the hanging ring 26 of disconnecting switch special hanger 5 is hung on suspension hook 13, the 10 forward and reverse rotation of hanging hoist engine
Turn to drive 14 folding and unfolding of steel wire rope, and then by disconnecting switch special hanger 5 and the GW5 types being fixed on disconnecting switch special hanger 5
Disconnecting switch 30 is sling or is put down.
The present invention has using versatility, as shown in fig. 6, the 66kV isolation of substation's form of ownership arrangement can be installed on
29 in switch framework.With lighter overall weight, it can be adapted to high-rise working.With more flexible assembling mode, it is convenient for
Eminence assembles.It disclosure satisfy that after a little installing, realize three-phase isolation switch lifting.For different device heights, can select
The column 3 of different height realizes the lifting of substation's lightweight device.As shown in figure 5, suitably welding is pacified on repairing lorry 31
Angle bar is filled, can be mounted on repairing lorry 31, large piece article is lifted for recovery vehicle, mitigates repair personnel's working strength.It adopts
It is lifted with movable pulley, improves the elevating capacity of suspender.Designed 30 special auxiliary lifting appliance of GW5 types disconnecting switch, lifting side
Just, hoisting personnel's experience is not depended on, during lifting, disconnecting switch stress is similar to " being embraced ", prevents because of the improper hair of lifting fixation
Life is fallen or porcelain knob fracture, improves work operations efficiency and safety.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of station Universal hoisting equipment, which is characterized in that including sequentially connected hanging apparatus, rotation from top to bottom
Rotary device, column and pedestal, further include disconnecting switch special hanger, and hanging apparatus can be around the 360 ° of horizontal rotations of column axis；Institute
It states hanging apparatus and includes arm and front and rear preceding suspension hook frame, movable pulley rack, swivel mount and the hanging being sequentially fixed on arm
Hoist engine further includes movable pulley, fixed pulley and suspension hook, and fixed pulley is fixed in movable pulley rack, and movable pulley is mounted on movable pulley
On steel wire rope between frame and preceding suspension hook frame, suspension hook is fixed below movable pulley, and disconnecting switch special hanger is hung on suspension hook；It hangs
The rotation of formula hoist engine drives hook lifting.
A kind of 2. station Universal hoisting equipment according to claim 1, which is characterized in that the rotating device packet
Include rotary shaft, bearing, bearing block and positioning pin；Bearing block is fixed on column top, and bearing is mounted on bearing block, rotary shaft
Mounted on bearings, swivel mount bottom is fixed on rotary shaft top.
3. a kind of station Universal hoisting equipment according to claim 2, which is characterized in that the rotary shaft is circumferential
Uniformly distributed multiple location holes, rotary shaft are circumferentially fixed with positioning pin by location hole.
4. a kind of station Universal hoisting equipment according to claim 1, which is characterized in that the pedestal includes upper
Pedestal and lower bottom base；Upper bed-plate center is equipped with cylinder, and barrel bore is equal to column outer diameter；Upper bed-plate is connected with lower bottom base by bolt
It connects.
5. a kind of station Universal hoisting equipment according to claim 1 or 4, which is characterized in that the column is
Tubular, bottom is equipped with lock hole, after column bottom is inserted into the cylinder of upper bed-plate, is fixed by lock hole and locking pin.
6. a kind of station Universal hoisting equipment according to claim 1, which is characterized in that the disconnecting switch is special
It is cross structure with suspender, crossbeam both ends are equipped with fastening lockset, are equipped with hanging ring at the top of vertical beam, and bottom sets that there are two rope slings.
7. a kind of station Universal hoisting equipment according to claim 1, which is characterized in that the arm is equipped with
Multigroup movable pulley rack mounting hole, the distance between movable pulley rack and preceding suspension hook frame are adjustable.
8. a kind of station Universal hoisting equipment according to claim 1, which is characterized in that the arm and column
It is made of high-strength aluminum alloy material, surface oxidation plated film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014214.2A CN108178073A (en) | 2018-01-08 | 2018-01-08 | A kind of station Universal hoisting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014214.2A CN108178073A (en) | 2018-01-08 | 2018-01-08 | A kind of station Universal hoisting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108178073A true CN108178073A (en) | 2018-06-19 |
Family
ID=62550037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810014214.2A Pending CN108178073A (en) | 2018-01-08 | 2018-01-08 | A kind of station Universal hoisting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108178073A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996402A (en) * | 2018-08-22 | 2018-12-14 | 惠安科培工业设计有限公司 | Transmission tower overhauls integrated device |
| CN109244948A (en) * | 2018-10-18 | 2019-01-18 | 国网黑龙江省电力有限公司检修公司 | Transformer substation grounding wire auxiliary device and grounding wire mounting equipment, method |
| CN110790172A (en) * | 2019-10-13 | 2020-02-14 | 国网山东省电力公司宁阳县供电公司 | Portable pole-mounted switch handling device |
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| CN108996402A (en) * | 2018-08-22 | 2018-12-14 | 惠安科培工业设计有限公司 | Transmission tower overhauls integrated device |
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| CN110790172B (en) * | 2019-10-13 | 2021-11-26 | 国网山东省电力公司宁阳县供电公司 | Portable pole-mounted switch handling device |
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Application publication date: 20180619 |