CN108199286A - A kind of 500kV GIS circuit breaker operation mechanisms dismounting and travelling bogie and application method - Google Patents
A kind of 500kV GIS circuit breaker operation mechanisms dismounting and travelling bogie and application method Download PDFInfo
- Publication number
- CN108199286A CN108199286A CN201810064889.8A CN201810064889A CN108199286A CN 108199286 A CN108199286 A CN 108199286A CN 201810064889 A CN201810064889 A CN 201810064889A CN 108199286 A CN108199286 A CN 108199286A
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- wheel
- circuit breaker
- dismounting
- travelling bogie
- suspension
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
Abstract
The invention discloses a kind of dismounting of 500kV GIS circuit breaker operation mechanisms and travelling bogie and application methods, it includes travelling bogie, and being slidably installed on the travelling bogie has dismounting coaster, and arc bracing plate assembly is fixed at the top of the dismounting coaster.The travelling bogie includes vehicle frame, the head of the vehicle frame be equipped with can folding and unfolding front-wheel, middle part is equipped with middle wheel, and tail portion is equipped with rear wheel, and the two sides of the vehicle frame are provided with multigroup coaster limiting standing screw being arranged symmetrically.When solving the dismounting maintenance of 500kV GIS circuit breaker operation mechanisms, since operating mechanism is overweight, volume is excessive and operating mechanism lower part is equipped with wire casing etc. and leads to the problem of operating mechanism dismounting is inconvenient, and operating personnel faces larger personal safety risk.
Description
Technical field
The present invention relates to a kind of dismounting of 500kV GIS circuit breaker operation mechanisms and travelling bogie and application methods, belong to high
Press field of transmission equipment.
Background technology
SF6 breakers are the breakers using SF6 gases as dielectric.Due to SF6 gases have excellent insulation and
Arc extinction performance makes in SF6 breaker high-tension circuits using more and more.In addition, as China Power cause rapidly develops, hair
Exhibition EHV transmission is the direction of China's electric utility development, therefore large size SF6 breakers are applied in current electric power enterprise
It is more and more.Understand SF6 breaker structures and technical characterstic, grasp the operation of SF6 breakers and maintenance technology, to ensureing power grid peace
Full reliability service improves electrical equipment installation, operation and maintenance quality, reduces electric power system fault probability and is of great significance.
It during normal operation, general every 15 years or is provided by manufacturing firm, an overhaul is carried out to major loop；GIS breakers
After breaking down, strip inspection is carried out immediately as needed；Be abnormal in operation or defect should carry out related electric property,
The experiments such as gas seal property according to corresponding result of the test, carry out necessary decompose and overhaul.
Invention content
The present invention is a kind of 500kV GIS circuit breaker operation mechanisms dismounting and travelling bogie, solves 500kV GIS open circuits
During the dismounting maintenance of device operating mechanism, since operating mechanism is overweight, volume is excessive and operating mechanism lower part is equipped with wire casing etc. and causes
The problem of operating mechanism dismounting is inconvenient, and operating personnel faces larger personal safety risk.
In order to realize above-mentioned technical characteristic, the object of the present invention is achieved like this：A kind of 500kV GIS breakers behaviour
Make mechanism dismounting and travelling bogie, it includes travelling bogie, and being slidably installed on the travelling bogie has dismounting coaster, described
Arc bracing plate assembly is fixed at the top of dismounting coaster.
The travelling bogie includes vehicle frame, the head of the vehicle frame be equipped with can folding and unfolding front-wheel, middle part is equipped with middle wheel,
Tail portion is equipped with rear wheel, and the two sides of the vehicle frame are provided with multigroup coaster limiting standing screw being arranged symmetrically.
The vehicle frame is assembled using section steel material welding, and the both side plate of the vehicle frame is formed using angle steel, in angle steel
Between be welded with more parallel arrangement reinforcing plates.
It is described can folding and unfolding front-wheel include front-wheel installation casing, the inside of the front-wheel installation casing is machined with accommodating groove, institute
It states and front component is hinged with by axis pin inside accommodating groove, the front component can be rotated around axis pin, and be set to accommodating groove
It is internal.
The dismounting coaster includes apparatus for suspension, and the apparatus for suspension uses rectangular frame structure, in the two sides pair of apparatus for suspension
Title is equipped with two groups of sheaves, and otic placode is fixed on the two side of the apparatus for suspension, is fixedly mounted on the otic placode by nut
There is adjustable limiting standing screw, multiple adjusting nuts are set on the adjustable limiting standing screw.
The arc bracing plate assembly includes arc fagging, and two middle side parts of the arc fagging are machined with spacing edge-cut, institute
It states and is provided with arc boss on the inner wall of arc fagging, support otic placode, the support ear are provided in spacing edge-cut position
Plate is matched with dismounting the adjustable limiting standing screw of coaster.
It is described can the wheel bar part of folding and unfolding front-wheel, middle wheel and rear wheel be both provided with helicitic texture, rotation can be passed through
Screw rod adjusts the height of wheel.
The application method of the dismounting of GIS circuit breaker operation mechanisms and travelling bogie described in any one, includes the following steps：
Step1：Assembled carriage, by can folding and unfolding front-wheel, middle vehicle 1 take turns and rear wheel is separately mounted to the corresponding position of vehicle frame, adjust
Middle wheel and rear wheel, will by two groups of coasters limiting standing screws on two lateral wall of angle steel of vehicle frame to proper height
Adjustable limiting standing screw is mounted on otic placode, and apparatus for suspension is placed on vehicle frame, then by the concave surface of arc fagging upward
It is placed on apparatus for suspension, adjustable limiting standing screw is made to pass through spacing edge-cut and pass through adjusting nut and is fixed；
Step2：Remove stoppage circuit breaker, by travelling bogie assembled in Step1 can folding and unfolding front-wheel lift, and for trolley mistake
The barriers such as slot box are prepared, and travelling bogie is pushed into suitable position below 500kV circuit breaker operation mechanisms, by being incited somebody to action after slot box
Can folding and unfolding front-wheel put down, and pass through fixing nut and fix；
Step3：After apparatus for suspension is pushed into below circuit breaker operation mechanism, standing screw fixed block is limited, and lead to by coaster
Cross adjustment can folding and unfolding front-wheel, middle wheel and rear wheel height, by arc fagging and the lower contacts of breaker, undertake trolley
Circuit breaker operation mechanism weight；
Step4：After dismantling circuit breaker operation mechanism fixing bolt, coaster limiting standing screw is unclamped, and apparatus for suspension is pushed into small
Standing screw is limited behind vehicle rear by coaster again to fix apparatus for suspension, circuit breaker operation mechanism center of gravity has moved into middle wheel at this time
Between rear wheel, dismounting fixing nut can folding and unfolding front-wheel lift, pull out travelling bogie, stoppage circuit breaker transported to specified
Position；
Step5：Circuit breaker operation mechanism is installed, the apparatus for suspension of tooling assembled in Step1 is pushed into behind trolley rear again
Standing screw is limited by coaster to fix apparatus for suspension, then by new breaker handling arc fagging, and trolley is pushed into disconnected
After the device installation site of road can folding and unfolding front-wheel put down, and pass through fixing nut and fix, apparatus for suspension is pushed into vehicle frame forefront, then lead to
Coaster limiting standing screw is crossed to fix apparatus for suspension；
Step6：By adjusting can folding and unfolding front-wheel, the height of middle wheel and rear wheel and rotation arc fagging by new breaker operator
The installation bolt hole of mechanism is aligned, and install fixing bolt with the fixed bolt hole on breaker body, and dismounting fixing nut will
Can folding and unfolding front-wheel lift and fix, pull out trolley, installation is complete for circuit breaker operation mechanism.
The method have the advantages that：
1st, it solves because 500kV GIS circuit breaker operation mechanisms weight weight, volume are big, no specific purpose tool operating mechanism is caused to be torn open
The problem of dress is serious inconvenient.
2nd, it solves because 500kV GIS circuit breaker operation mechanisms weight weight, volume are big, operating personnel is caused to face labour strong
The problem of degree is big, personal safety risk and equipment safety risk are higher.
3rd, it solves because being equipped with the barriers such as secondary slot box below 500kV GIS circuit breaker operation mechanisms, leads to not
Smoothly the problem of dismounting circuit breaker operation mechanism.
4th, there is dismounting coaster by being slidably installed on the travelling bogie, it can be to being positioned over dismounting coaster top
The breaker in portion adjusts the center of gravity of entire travelling bogie into line slip, achievees the purpose that stablize transport.
5th, by it is described can folding and unfolding front-wheel can adapt to narrow dismounting space, and then ensure that and normally dismantled
Journey, ensure that can the operation in small space, can ensure that coaster smoothly enters open circuit to be dismounted by its folding and unfolding
Device bottom.
6th, it can be fitted by the arc fagging with the outer wall of breaker, and then ensure that placed breaker
It keeps stablizing.
7th, it can be limited by the arc boss to being located at the breaker at the top of arc fagging, be placed on movement
It slides in the process.
8th, arc fagging angle of inclination can be adjusted by the adjustable limiting standing screw and adjusting nut, and then
It ensure that the breaker at the top of it keeps stablizing, prevent it from shaking.
9th, it ensure that it can be matched, and then ensure that dismounting coaster with dismounting the sheave of coaster by using angle steel
It can be moved on vehicle frame.
10th, limiting standing screw by coaster can match with otic placode and then to being located at the apparatus for suspension progress at the top of vehicle frame
Effective limiting, prevents it from automatically moving, and then ensure that the safety of operation.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is overall structure diagram of the present invention.
Fig. 2 is travelling bogie modular construction schematic diagram of the present invention.
Fig. 3 is present invention dismounting pulley structure schematic diagram.
Fig. 4 is arc bracing plate assembly structure diagram of the present invention.
Fig. 5 is structure diagram when the present invention uses.
In figure：Vehicle frame 1, can folding and unfolding front-wheel 2, middle wheel 3, rear wheel 4, coaster limiting standing screw 5, apparatus for suspension 6, coaster
Wheel 7, it is adjustable limiting standing screw 8, otic placode 9, arc fagging 10, spacing edge-cut 11, breaker 12, angle steel 13, reinforcing plate 14,
Adjusting nut 15, support otic placode 16, arc boss 17；
Front-wheel installation casing 201, accommodating groove 202, axis pin 203, front component 204.
Specific embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
Embodiment 1：
As shown in Figs. 1-5, a kind of 500kV GIS circuit breaker operation mechanisms dismounting and travelling bogie, it includes travelling bogie, described
Being slidably installed on travelling bogie has dismounting coaster, and arc bracing plate assembly is fixed at the top of the dismounting coaster.By adopting
It can be used in the dismounting of breaker with above-mentioned travelling bogie, and then the effective breaker weight that solves is big, the big dismounting of volume
The problem of inconvenient, and disassembly efficiency is improved, the labor intensity of operating personnel is reduced, ensure that the safety of operation, is dropped
Low equipment safety risk.
Further, the travelling bogie includes vehicle frame 1, the head of the vehicle frame 1 be equipped with can folding and unfolding front-wheel 2, middle part
Middle wheel 3 is installed, tail portion is equipped with rear wheel 4, and the two sides of the vehicle frame 1 are provided with multigroup coaster limiting being arranged symmetrically
Standing screw 5.In the course of work, whole device can be driven to move, and then make it into breaker institute by travelling bogie
In position.
Further, the vehicle frame 1 is welded assembled using section steel material, and the both side plate of the vehicle frame 1 uses angle steel
13 are formed, and the reinforcing plate 14 of more parallel arrangements is welded between angle steel 13.In the course of work, angle steel 13 is slided for dismounting
Vehicle provides the track of walking, and then ensure that it can normally be slided.
Further, it is described can folding and unfolding front-wheel 2 include front-wheel installation casing 201, the inside of the front-wheel installation casing 201
It is machined with accommodating groove 202, front component 204, the front component 204 is hinged with by axis pin 203 inside the accommodating groove 202
It can rotate, and be set to inside accommodating groove 202 around axis pin 203.By using can folding and unfolding front-wheel 2 can convenience in transport trolley exist
It is moved in small space.On the other hand play the role of supporting 1 head of vehicle frame in disassembly process.The front component 204
It can be stored inside accommodating groove 202, and it can be rotated around axis pin 203.
Further, the dismounting coaster includes apparatus for suspension 6, and the apparatus for suspension 6 uses rectangular frame structure, in apparatus for suspension
6 two sides are symmetrically installed with two groups of sheaves 7, and otic placode 9 is fixed on the two side of the apparatus for suspension 6, is led on the otic placode 9
It crosses nut and is installed with adjustable limiting standing screw 8, multiple adjustings are set on the adjustable limiting standing screw 8
Nut 15.It can be matched by the sheave 7 with the angle steel 13 on vehicle frame 1, and then ensure that apparatus for suspension 6 can be along
Vehicle frame 1 slides, and achievees the purpose that adjust 12 center of gravity of breaker.
Further, the arc bracing plate assembly includes arc fagging 10, and two middle side parts of the arc fagging 10 are processed
There is spacing edge-cut 11, arc boss 17 is provided on the inner wall of the arc fagging 10, set in 11 position of spacing edge-cut
There is support otic placode 16, the support otic placode 16 is matched with dismounting the adjustable limiting standing screw 8 of coaster.Pass through arc fagging
10 can be supported the breaker after dismounting.
Further, it is described can the wheel bar part of folding and unfolding front-wheel 2, middle wheel 3 and rear wheel 4 be both provided with helicitic texture,
By rotary screw, the height of wheel can be adjusted.It can ensure the stabilization of entire trolley movement by the height for adjusting wheel
Property.
Embodiment 2：
The application method of the dismounting of GIS circuit breaker operation mechanisms and travelling bogie described in any one, includes the following steps：
Step1：Assembled carriage, by can folding and unfolding front-wheel 2, middle vehicle 1 take turns 3 and rear wheel 4 be separately mounted to the corresponding position of vehicle frame 1,
Two groups of coasters are limited standing screw 5 and are mounted on outside 13 liang of the angle steel of vehicle frame 1 by wheel 3 and rear wheel 4 to proper height in adjusting
On side wall, adjustable limiting standing screw 8 is mounted on otic placode 9, and apparatus for suspension 6 is placed on vehicle frame 1, then arc is supportted
The concave surface of plate 10 is placed on upward on apparatus for suspension 6, and adjustable limiting standing screw 8 is made to pass through spacing edge-cut 11 and pass through adjusting spiral shell
Mother 15 fixes；
Step2：Remove stoppage circuit breaker, by travelling bogie assembled in Step1 can folding and unfolding front-wheel 2 lift, and for trolley
It crosses the barriers such as slot box to prepare, travelling bogie is pushed into suitable position below 500kV circuit breaker operation mechanisms, after slot box
Can folding and unfolding front-wheel 2 put down, and pass through fixing nut and fix；
Step3：After apparatus for suspension 6 is pushed into below circuit breaker operation mechanism, 5 fixed block of standing screw is limited by coaster, and
By adjusting can folding and unfolding front-wheel 2, middle wheel 3 and rear wheel 4 height, the lower contacts of arc fagging 10 and breaker make
Trolley undertakes circuit breaker operation mechanism weight；
Step4：After dismantling circuit breaker operation mechanism fixing bolt, coaster limiting standing screw 5 is unclamped, and apparatus for suspension 6 is pushed into
Standing screw 5 is limited behind trolley rear by coaster again to fix apparatus for suspension 6, during circuit breaker operation mechanism center of gravity has moved at this time
Between wheel 3 and rear wheel 4, dismounting fixing nut can folding and unfolding front-wheel 2 lift, pull out travelling bogie, stoppage circuit breaker is transported
Transport to designated position；
Step5：Circuit breaker operation mechanism is installed, the apparatus for suspension 6 of tooling assembled in Step1 is pushed into behind trolley rear again
Standing screw 5 is limited by coaster to fix apparatus for suspension 6, then by new breaker handling arc fagging 10, and trolley is pushed away
Enter after breaker installation site can folding and unfolding front-wheel 2 put down, and pass through fixing nut and fix, before apparatus for suspension 6 is pushed into vehicle frame 1 most
Side, then standing screw 5 is limited by coaster and fixes apparatus for suspension 6；
Step6：By adjusting can folding and unfolding front-wheel 2, the height of middle wheel 3 and rear wheel 4 and rotation arc fagging 10 will new open circuit
The installation bolt hole of device operating mechanism is aligned, and install fixing bolt with the fixed bolt hole on breaker body, and dismounting is fixed
Nut can folding and unfolding front-wheel 2 lift and fix, pull out trolley, installation is complete for circuit breaker operation mechanism.
Above-described embodiment be used for illustrate the present invention rather than limit the invention, the present invention spirit and
In scope of the claims, to any modifications and changes that the present invention makes, protection scope of the present invention is both fallen within.
Claims (8)
1. a kind of 500kV GIS circuit breaker operation mechanisms dismounting and travelling bogie, it is characterised in that：It includes travelling bogie, institute
It states to be slidably installed on travelling bogie and has dismounting coaster, arc bracing plate assembly is fixed at the top of the dismounting coaster.
2. a kind of 500kV GIS circuit breaker operation mechanisms dismounting according to claim 1 and travelling bogie, feature exist
In：The travelling bogie includes vehicle frame（1）, the vehicle frame（1）Be equipped with can folding and unfolding front-wheel on head（2）, during middle part is equipped with
Wheel（3）, tail portion is equipped with rear wheel（4）, the vehicle frame（1）To be provided with multigroup coaster limiting being arranged symmetrically solid for two sides
Determine screw rod（5）.
3. a kind of 500kV GIS circuit breaker operation mechanisms dismounting according to claim 2 and travelling bogie, feature exist
In：The vehicle frame（1）Assembled, the vehicle frame is welded using section steel material（1）Both side plate use angle steel（13）It forms,
Angle steel（13）Between be welded with more parallel arrangement reinforcing plates（14）.
4. a kind of 500kV GIS circuit breaker operation mechanisms dismounting according to claim 2 and travelling bogie, feature exist
In：It is described can folding and unfolding front-wheel（2）Including front-wheel installation casing（201）, the front-wheel installation casing（201）Inside be machined with receipts
Receive slot（202）, the accommodating groove（202）Inside passes through axis pin（203）It is hinged with front component（204）, the front component
（204）It can be around axis pin（203）Rotation, and set to accommodating groove（202）It is internal.
5. a kind of 500kV GIS circuit breaker operation mechanisms dismounting according to claim 1 and travelling bogie, feature exist
In：The dismounting coaster includes apparatus for suspension（6）, the apparatus for suspension（6）Using rectangular frame structure, in apparatus for suspension（6）Both sides
Face is symmetrically installed with two groups of sheaves（7）, the apparatus for suspension（6）Two side on be fixed with otic placode（9）, the otic placode（9）On
Adjustable limiting standing screw is installed with by nut（8）, the adjustable limiting standing screw（8）On be set with it is more
A adjusting nut（15）.
6. a kind of 500kV GIS circuit breaker operation mechanisms dismounting according to claim 1 and travelling bogie, feature exist
In：The arc bracing plate assembly includes arc fagging（10）, the arc fagging（10）Two middle side parts be machined with spacing edge-cut
（11）, the arc fagging（10）Inner wall on be provided with arc boss（17）, in spacing edge-cut（11）Position is provided with
Support otic placode（16）, the support otic placode（16）Adjustable limiting standing screw with dismounting coaster（8）It matches.
7. a kind of 500kV GIS circuit breaker operation mechanisms dismounting according to claim 2 and travelling bogie, feature exist
In：It is described can folding and unfolding front-wheel（2）, middle wheel（3）And rear wheel（4）Wheel bar part be both provided with helicitic texture, can pass through
Rotary screw adjusts the height of wheel.
8. the application method of the dismounting of GIS circuit breaker operation mechanisms and travelling bogie described in claim 1-7 any one, feature
It is to include the following steps：
Step1：Assembled carriage, can folding and unfolding front-wheel（2）, middle vehicle 1 takes turns（3）And rear wheel（4）It is separately mounted to vehicle frame（1）Phase
Answer position, wheel in adjusting（3）And rear wheel（4）To proper height, two groups of coasters are limited into standing screw（5）Mounted on vehicle frame
（1）Angle steel（13）On two lateral walls, by adjustable limiting standing screw（8）Mounted on otic placode（9）On, and by apparatus for suspension（6）
It is placed on vehicle frame（1）On, then by arc fagging（10）Concave surface be placed on apparatus for suspension upward（6）On, fix adjustable limiting
Screw rod（8）Across spacing edge-cut（11）And pass through adjusting nut（15）It is fixed；
Step2：Remove stoppage circuit breaker, by travelling bogie assembled in Step1 can folding and unfolding front-wheel（2）It lifts, and is small
Vehicle crosses the barriers such as slot box and prepares, and by suitable position below travelling bogie push-in 500kV circuit breaker operation mechanisms, passes through slot box
After can folding and unfolding front-wheel（2）It puts down, and passes through fixing nut and fix；
Step3：By apparatus for suspension（6）After being pushed into below circuit breaker operation mechanism, standing screw is limited by coaster（5）It is fixed to slide
Vehicle, and by adjusting can folding and unfolding front-wheel（2）, middle wheel（3）And rear wheel（4）Height, by arc fagging（10）With breaker
Lower contacts, trolley is made to undertake circuit breaker operation mechanism weight；
Step4：After dismantling circuit breaker operation mechanism fixing bolt, coaster limiting standing screw is unclamped（5）, and by apparatus for suspension（6）
Standing screw is limited by coaster again after being pushed into trolley rear（5）By apparatus for suspension（6）It fixes, at this time circuit breaker operation mechanism center of gravity
Have moved into middle wheel（3）With rear wheel（4）Between, dismounting fixing nut can folding and unfolding front-wheel（2）It lifts, pulls out travelling bogie,
Stoppage circuit breaker is transported to designated position；
Step5：Circuit breaker operation mechanism is installed, by the apparatus for suspension of tooling assembled in Step1（6）After being pushed into trolley rear
Standing screw is limited by coaster again（5）By apparatus for suspension（6）It is fixed, then by new breaker handling arc fagging（10）On, and
Trolley is pushed into can folding and unfolding front-wheel after breaker installation site（2）It puts down, and passes through fixing nut and fix, by apparatus for suspension（6）
It is pushed into vehicle frame（1）Forefront, then standing screw is limited by coaster（5）By apparatus for suspension（6）It is fixed；
Step6：By adjusting can folding and unfolding front-wheel（2）, middle wheel（3）And rear wheel（4）Height and rotation arc fagging（10）
The installation bolt hole of new circuit breaker operation mechanism is aligned, and install fixing bolt with the fixed bolt hole on breaker body,
Dismantling fixing nut can folding and unfolding front-wheel（2）It lifts and fixes, pull out trolley, installation is complete for circuit breaker operation mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810064889.8A CN108199286B (en) | 2018-01-23 | 2018-01-23 | Dismounting and transporting trolley for 500kV GIS breaker operating mechanism and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810064889.8A CN108199286B (en) | 2018-01-23 | 2018-01-23 | Dismounting and transporting trolley for 500kV GIS breaker operating mechanism and use method |
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| Publication Number | Publication Date |
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| CN108199286A true CN108199286A (en) | 2018-06-22 |
| CN108199286B CN108199286B (en) | 2023-06-13 |
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| CN201810064889.8A Active CN108199286B (en) | 2018-01-23 | 2018-01-23 | Dismounting and transporting trolley for 500kV GIS breaker operating mechanism and use method |
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| CN110249827A (en) * | 2019-06-28 | 2019-09-20 | 江苏盐西高新绿色产业发展有限公司 | A kind of Gardens are trimmed to about machine |
| CN111614010A (en) * | 2020-05-12 | 2020-09-01 | 中国长江电力股份有限公司 | 500kV welding type GIL pipeline bus decomposition and maintenance method |
| CN114024236A (en) * | 2021-11-09 | 2022-02-08 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Circuit breaker replacing device |
| CN114055396A (en) * | 2020-08-07 | 2022-02-18 | 中核核电运行管理有限公司 | Horizontal long cylindric filter screen dismouting device |
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