CN107367675B - Test device for mobile extra-high voltage power test - Google Patents
Test device for mobile extra-high voltage power test Download PDFInfo
- Publication number
- CN107367675B CN107367675B CN201710748746.4A CN201710748746A CN107367675B CN 107367675 B CN107367675 B CN 107367675B CN 201710748746 A CN201710748746 A CN 201710748746A CN 107367675 B CN107367675 B CN 107367675B
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- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 230000007306 turnover Effects 0.000 claims description 9
- 230000008602 contraction Effects 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 2
- 108010066114 cabin-2 Proteins 0.000 description 9
- 230000013011 mating Effects 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
- Handcart (AREA)
Abstract
The invention relates to a test device for a mobile extra-high voltage power test, which comprises a reactor assembly and a transport device, wherein the transport device comprises a transport vehicle and a carriage, and the carriage comprises two side plates; a roof panel capable of being abutted to form a roof; the front plate assembly and the tail plate are positioned at the front end and the rear end of the side plate, the top plate and the frame form a containing cavity, the front end and the rear end of the containing cavity are closed, the tail plate is arranged on the frame in a pivoting manner along the width direction of the frame, and the transportation equipment further comprises telescopic supporting legs which are respectively used for supporting the side plate and the tail plate to be unfolded to form an open platform; the test device further comprises a supporting seat arranged on the inner side of the tail plate and used for supporting the reactor assembly, and a driving mechanism used for enabling the reactor assembly lying in the carriage to outwards and vertically overturn. The carriage can be unfolded to form an open platform; meanwhile, under the premise that the transport vehicle does not need to be moved, when the tail plate is turned over to the horizontal position, the reactor component can be directly tested, and the method is simple and convenient.
Description
Technical Field
The invention relates to the field of power test equipment, in particular to a test device for a mobile ultra-high voltage power test.
Background
The traditional alternating current withstand voltage test device is generally large in size, various in components and parts and generally fixedly installed in a test hall. However, in order to meet the requirement of field test, the present transportation device is necessarily related to storage and transportation of the test device, and the present transportation device mainly comprises an electric transport vehicle and a carriage positioned on the electric transport vehicle, wherein the carriage unfolding mode comprises a side door plate opening mode, a top cover wing opening mode, a tail plate unfolding mode and the like, and the present transportation device is applied to various occasions (see a stage vehicle, a garbage truck, a dump truck and the like in particular), but each unfolding mode has a carriage side plate or a top plate which is not unfolded, so that a simple side wall or top is unfolded, the insulation safety distance required by the test on the vehicle cannot be met, and the test cannot be unfolded on the vehicle.
In order to solve the above technical problems, the present applicant and 2016.3.23 apply for a patent application with publication number CN 105425116A, which specifically relates to a mobile surge voltage testing device, comprising: the movable equipment with the carriage body, the lifting bottom plate which is arranged in the carriage body and can vertically overturn in the carriage body, the high-voltage impact generator tower which is arranged in parallel with the lifting bottom plate, the high-voltage impact generator arranged on the tower, the locking unit arranged between the lifting bottom plate and the tower and the supporting plate for supporting the tower.
However, the applicant found in practical use that the following disadvantages still exist:
1) The carriage cannot be fully opened, so that an open working platform cannot be provided;
2) The impact generator is erected on the ground, and when the impact generator is folded (the impact generator is turned down) and the vehicle is required to be moved again after the transport vehicle is required to be moved in the use process, the impact generator is unfolded on the ground for use.
Disclosure of Invention
The invention aims to solve the technical problem of providing an improved test device for the mobile extra-high voltage power test, wherein a carriage of the test device can be completely unfolded to form a completely opened test platform, so that the stability of test equipment after being unfolded is enhanced, and the test equipment is very convenient to assemble and integrally transport; meanwhile, under the premise that the transport vehicle does not need to be moved, when the tail plate is turned over to the horizontal position, the reactor component can be directly subjected to test along with turning over, the operation is simpler and more convenient, and in addition, the device is high in integrated automation degree, the working efficiency is remarkably improved, and the device is safe, reliable and convenient.
In order to solve the technical problems, the invention adopts the following technical scheme:
the test device for the mobile extra-high voltage power test comprises a reactor assembly and a transport device, wherein the transport device comprises a transport vehicle and a carriage, and the carriage comprises two side plates which extend along the length direction of a frame and are turned around the extending direction to the inside and the outside of the transport vehicle; the top plates are respectively fixedly arranged on the side plates and can be butted to form a carriage top; the front plate assembly and the tail plate are positioned at the front end and the rear end of the side plate, the top plate and the frame to form a containing cavity, the front end and the rear end of the containing cavity are closed, the two side plates are respectively positioned at two sides of the width direction of the frame, the tail plate is rotatably arranged on the frame through a pivot along the width direction of the frame, and the transportation equipment further comprises telescopic supporting legs respectively used for supporting the side plate and the tail plate to be unfolded to form an open platform; the test device further comprises a supporting seat arranged on the inner side of the tail plate and used for supporting the reactor assembly, and a driving mechanism arranged on the frame and used for enabling the reactor assembly lying in the carriage to outwards and vertically overturn, wherein when the carriage is an open platform, the reactor assembly is vertically arranged.
Preferably, the top plate and the side plates are vertically arranged and integrally formed, and the longitudinal section of the top plate is L-shaped.
Preferably, when the carriage is an open platform, the side plates and the tail plates are respectively unfolded outwards of the carriage and horizontally arranged, and the top plates are respectively erected on the opposite outer sides of the two side plates; when the carriage is closed, the side plates and the tail plates are respectively turned inwards, and the top plates are in butt joint to form a horizontally arranged panel.
According to one specific and preferred aspect of the present invention, the front plate assembly includes a front plate fixed to a front end portion of the frame; fixed side plates fixedly arranged on two sides of the front plate; and the cover plate can be movably arranged on the front plate and can close or open the top of a containing cavity formed between the front plate, the fixed side plates on two sides and the frame, wherein the front plate component and the frame form a front carriage body which is arranged close to the vehicle head and is open at the tail, the side plates, the tail plate and the frame form a rear carriage body, and when the rear carriage body is closed, the tail opening part of the front carriage body can be closed.
Preferably, when the front carriage body and the rear carriage body are both closed, the fixed side plates are respectively flush with the side plates, and the cover plate is flush with the top plate.
Specifically, the cover plate is provided on the front plate so as to pivot around the vehicle frame width direction.
Alternatively, the cover plate is slidably disposed on the front plate in the front-rear direction or the left-right direction. In both embodiments, the top of the front carriage body can be opened or closed, and the tail of the front carriage body is not interfered.
According to still another specific implementation and preferred aspect of the present invention, a fastening portion is provided at a front end portion of the side plate, and a mating portion matched with the fastening portion is provided at a rear end portion of the fixed side plate, and the fastening portion is relatively locked with the mating portion when the rear compartment is closed. Thereby improving the stability of the closed carriage and further enhancing the transportation safety of the transportation equipment.
According to a further specific and preferred aspect of the present invention, the support base is provided with a damper, the main purpose of which is to: when the reactor component is about to be erected, the buffer can effectively reduce the impact force when the reactor is overturned, and reduce the running risk of the mechanism.
Specifically, the reactor assembly comprises a buffer rack arranged on a supporting seat, a reactor arranged on the reactor rack, a bracket which is horizontally arranged in a carriage and can be fixedly connected with the reactor rack through a manipulator, an inflatable pressure equalizing ball arranged at the upper end of the reactor, and a voltage divider, wherein the driving mechanism comprises hydraulic cylinders which are arranged at two sides and two ends respectively and are rotatably arranged on the carriage and the bracket, when in test, the reactor is vertically arranged, the manipulator is loosened, the bracket is reset and horizontally arranged in the carriage, and the pressure equalizing ball is in a sufficient air pressure state; and after the test is finished, the gas in the pressure equalizing ball is discharged and is laid down in the carriage together with the reactor.
Preferably, the transportation equipment further comprises telescopic supporting legs for adjusting the vehicle frame to be horizontally supported on the ground, and a turnover mechanism for driving the side plates and the tail plates to automatically turn inwards and outwards respectively, wherein the turnover mechanism is a hydraulic cylinder, and the turnover and the reset of the side plates and the tail plates are realized by the extension and the contraction of the hydraulic cylinder.
In addition, the laminating that scalable landing leg can outwards overturn around the upper end is in the outside of curb plate and tailboard, and when curb plate and tailboard were in open platform state, scalable landing leg set up perpendicularly with curb plate and tailboard respectively.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
the carriage can be completely unfolded to form a completely opened test platform, so that the stability of the test equipment after being unfolded is enhanced, and the test equipment is very convenient to assemble and integrally transport; meanwhile, under the premise that the transport vehicle does not need to be moved, when the tail plate is turned over to the horizontal position, the reactor component can be directly subjected to test along with turning over, the operation is simpler and more convenient, and in addition, the device is high in integrated automation degree, the working efficiency is remarkably improved, and the device is safe, reliable and convenient.
Drawings
FIG. 1 is a schematic front view of the transport structure of the present invention (with the carriage in an unfolded state);
FIG. 2 is a right side schematic view of FIG. 1;
FIG. 3 is an enlarged schematic view of the tilting mechanism of the present invention;
wherein: 1. a transport vehicle; 1a, a frame; 2. a carriage; a. a front carriage body; b. a rear carriage body; 20. a side plate; c. a fastening part; 21. a top plate; 22. a front plate assembly; 220. a front plate; 221. fixing the side plates; d. a mating portion; 222. a cover plate; 23. a tail plate; 3. a reactor assembly; 30. a device frame; 31. a reactor; 32. a manipulator; 33. a bracket; 34. equalizing balls; 35. a voltage divider; 4. a headstock; 5. a retractable leg; 6. a retractable support leg; 7. a turnover mechanism; 8. a support base; 9. a driving mechanism; 90. a hydraulic cylinder; 10. a buffer.
Description of the embodiments
As shown in fig. 1 to 3, this example provides a test device for a portable extra-high voltage power test, which includes a transport vehicle 1, a cabin 2, and a reactor assembly 3 capable of lying and standing on the cabin 2, wherein the cabin 2 extends in the front-rear direction (in this example, the front corresponds to a head 4 portion, and the rear corresponds to a tail portion).
Specifically, the cabin 2 includes two side plates 20 that extend along the length direction of the frame 1a and are turned inside out around the extending direction; top plates 21 fixedly provided on the side plates 20, respectively, and capable of being butted to form a roof; and a front plate assembly 22 and a tail plate 23 which are positioned at the front and rear ends of the side plates 20 and form a containing cavity by the side plates 20, the top plate 21 and the frame 1a, wherein the two side plates 20 are respectively positioned at two sides of the width direction of the frame 1a, and the tail plate 23 is arranged on the frame 1a by pivoting along the width direction of the frame 1 a.
The top plate 21 is perpendicular to the side plate 20, is integrally formed, and has an L-shaped longitudinal section.
The front plate assembly 22 includes a front plate 220 fixed to the front end portion of the frame 1 a; fixed side plates 221 fixedly disposed at both sides of the front plate 220; and a cover plate 222 movably arranged on the front plate 220 and closing or opening the top of a containing cavity formed between the front plate 220, fixed side plates 221 on two sides and the frame 1a, wherein the front plate assembly 22 and the frame 1a form a front compartment a which is arranged close to the head 4 and is open at the tail, the side plates 20, the tail plate 23 and the frame 1a form a rear compartment b, and when the rear compartment b is closed, the tail opening part of the front compartment a can be closed.
Specifically, the cover 222 is pivotally provided on the front plate 220 so as to pivot around the width direction of the frame 1 a.
Alternatively, the cover plate 222 is slidably disposed on the front plate 220 in the front-rear direction or the left-right direction. In both embodiments, the top of the front compartment a may be opened or closed without interfering with the tail of the front compartment a.
In this example, the cover plate 222 is turned outwards around the upper end of the front plate 220, and is mainly used for opening or closing the top of the front compartment a by respectively rotating the two ends of the cover plate 222 around the hydraulic cylinder between the front plate 220.
Further, a fastening portion c is provided at the front end of the side plate 20, and a mating portion d is provided at the rear end of the fixed side plate 221, which mates with the fastening portion c, and when the rear compartment is closed, the fastening portion c and the mating portion d are locked relatively. Thereby improving the stability of the closed carriage and further enhancing the transportation safety of the transportation equipment.
Meanwhile, in consideration of the integrity of the car, when both the front car body a and the rear car body b are closed, the fixed side plates 221 and the side plates 20, and the cover plate 222 and the top plate 21 are respectively arranged flush.
In this example, the transportation device further comprises retractable legs 5 for supporting the side plates 20 and the tail plates 23 to be unfolded to form an open platform, when the carriage 2 is in the open platform, the side plates 20 and the tail plates 23 are unfolded outwards towards the frame 1a and are horizontally arranged, and the top plates 21 are respectively erected on the opposite outer sides of the two side plates 20; when the vehicle cabin 2 is closed, the side plates 20 and the tail plates 23 are turned into the vehicle frame 1a respectively, and the top plate 21 is butted to form a horizontally arranged panel.
Further, the telescopic legs 5 can be attached to the outer sides of the side plates 20 and the tail plates 23 in a manner of being turned outwards around the upper end parts, and when the side plates 20 and the tail plates 23 are in an open platform state, the telescopic legs 5 are respectively arranged perpendicular to the side plates 20 and the tail plates 23.
In addition, the above-mentioned transportation device further comprises a telescopic supporting leg 6 for adjusting the frame 1a to be horizontally supported on the ground, and a turnover mechanism 7 for driving the side plate 20 and the tail plate 23 to automatically turn inwards and outwards respectively, wherein the turnover mechanism 7 is a hydraulic cylinder, and the turnover and the resetting of the side plate and the tail plate are realized by the extension and the contraction of the hydraulic cylinder. Specifically, in combination with fig. 3, connecting seats are respectively provided on the outer side of the side plate 20 and the bottom of the frame 1a, then two end portions of the hydraulic cylinder are respectively rotatably provided on the connecting seats, similarly, connecting seats are respectively provided on the outer side of the tail plate and the bottom of the frame 1a, and then two end portions of the hydraulic cylinder are respectively rotatably provided on the connecting seats (not shown in the figure).
Meanwhile, the telescopic supporting legs 6 and the telescopic supporting legs 5 are respectively provided with an automatic leveling unit. As for intelligent telescoping of the legs, it is quite common in the art and will not be described in detail here.
In summary, the car in this embodiment has two embodiments (which may be arbitrarily selected according to the use requirement):
1. the side plate, the top plate, the front plate, the tail plate and the frame form a section of carriage body, and the side part and the top part can be in an unfolding state at the same time;
2. the front carriage body is composed of a front plate, a fixed side plate, a cover plate and a frame, and then the rear carriage body is composed of a side plate, a top plate, a tail plate and a frame, so that the tail opening part of the front carriage body is closed, and the whole carriage body is formed.
In this example, the second embodiment was selected, and the above-described test apparatus further includes a support seat 8 provided on the inner side of the tailgate 23 for supporting the reactor assembly 3, and a driving mechanism 9 provided on the frame 1a for turning the reactor assembly 3 lying in the cabin 2 outward and vertically, wherein the reactor assembly 3 is vertically disposed when the cabin 2 is in the open platform.
Specifically, the buffer 10 is installed on the supporting seat 8, and the main purpose of setting the buffer 10 is as follows: when the reactor assembly 3 is about to be erected, the buffer 10 can effectively reduce the impact force when the reactor is overturned, and reduce the running risk of the mechanism. As for the specific structure of the damper 10, the application is directly outsourced, and the specific structure and principle thereof will not be further explained again.
In this example, the reactor assembly 3 includes a reactor frame 30 provided on the support base 8, a reactor 31 provided on the reactor frame 30, a bracket 33 lying in the cabin 2 and fixedly connected to the reactor frame 30 by a robot 32, an inflatable pressure equalizing ball 34 provided on an upper end of the reactor 31, and a voltage divider 35, wherein the voltage divider 35 is fixed to the reactor 31 in a state where it is close to the reactor 31.
The driving mechanism 9 comprises hydraulic cylinders 90 which are arranged on two sides and the two ends of which are respectively and rotatably arranged on the frame 1a and the bracket 33, when in test, the reactor 31 is vertically arranged, the manipulator 32 is loosened, the bracket 33 is reset and lies in the carriage 2, and the pressure equalizing ball 34 is in a pressure sufficient state; when the test is completed, the gas in the pressure equalizing ball 34 is discharged and is laid down in the cabin 2 together with the reactor 31 (the specific pressure equalizing ball 34 is placed in the front cabin a; the bracket 33 and the reactor 31 are located in the rear cabin a).
The present invention has been described in detail with the purpose of enabling those skilled in the art to understand the contents of the present invention and to implement the same, but not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides a test device that portable extra-high voltage power test used, its includes reactor subassembly and transportation equipment, transportation equipment include transport vechicle and carriage, its characterized in that: the carriage comprises two side plates which extend along the length direction of the carriage frame and turn around the direction to the inside and the outside of the transport vehicle; the top plates are respectively fixedly arranged on the side plates and can be butted to form a carriage top; the front plate assembly and the tail plate are positioned at the front end and the rear end of the side plate to close the front end and the rear end of the accommodating cavity formed by the side plate, the top plate and the frame, wherein the two side plates are respectively positioned at two sides of the width direction of the frame, the tail plate is rotatably arranged on the frame through a pivot along the width direction of the frame, and the transportation equipment further comprises telescopic supporting legs respectively used for supporting the side plate and the tail plate to be unfolded to form an open platform; the test device also comprises a supporting seat arranged on the inner side of the tail plate and used for supporting the reactor assembly, and a driving mechanism arranged on the frame and used for enabling the reactor assembly lying in the carriage to outwards and vertically overturn, wherein when the carriage is an open platform, the reactor assembly is vertically arranged; the front plate assembly comprises a front plate fixed at the front end part of the frame; fixed side plates fixedly arranged on two sides of the front plate; the front plate component and the frame form a front carriage body which is arranged close to a vehicle head and is open at the tail, the side plates, the tail plates and the frame form a rear carriage body, when the rear carriage body is closed, the tail opening part of the front carriage body can be closed, and when the carriage is in the open platform, the side plates and the tail plates are respectively unfolded outwards and horizontally arranged towards the frame, and the top plates are respectively erected at the opposite outer sides of the two side plates; when the carriage is closed, the side plates and the tail plates are turned inwards to form a horizontally arranged panel in a butt joint mode, the front end portions of the side plates are provided with buckling parts, the rear end portions of the fixed side plates are provided with matching parts matched with the buckling parts, and when the rear carriage is closed, the buckling parts and the matching parts are locked relatively;
the top plate is perpendicular to the side plates, is integrally formed, and has an L-shaped longitudinal section;
when the front carriage body and the rear carriage body are both closed, the fixed side plates, the cover plates and the top plate are respectively arranged in a flush manner.
2. The test device for mobile extra-high voltage power test according to claim 1, wherein: the cover plate is arranged on the front plate in a pivot way around the width direction of the frame.
3. The test device for mobile extra-high voltage power test according to claim 1, wherein: the cover plate is arranged on the front plate in a sliding manner along the front-back direction or the left-right direction.
4. The test device for mobile extra-high voltage power test according to claim 1, wherein: the supporting seat is provided with a buffer, the reactor component comprises a reactor frame which is arranged on the supporting seat and can buffer, a reactor arranged on the reactor frame, a bracket which is arranged in the carriage in a lying manner and can be fixedly connected with the reactor frame through a manipulator, an inflatable pressure equalizing ball arranged at the upper end of the reactor and a pressure divider, the driving mechanism comprises hydraulic cylinders which are arranged at two sides and the two ends of which are respectively and rotatably arranged on the frame and the bracket, when in test, the reactor is vertically arranged, the manipulator is loosened, the bracket is reset and lies in the carriage, and the pressure equalizing ball is in an air pressure sufficient state; and after the test is finished, discharging the gas in the pressure equalizing ball and sleeping in the carriage together with the reactor.
5. The test device for mobile extra-high voltage power test according to claim 1, wherein: the transportation equipment also comprises telescopic supporting legs used for adjusting the frame to be horizontally supported on the ground, and a turnover mechanism respectively used for driving the side plates and the tail plates to automatically turn inwards and outwards, wherein the turnover mechanism is a hydraulic cylinder, and the side plates and the tail plates are turned over and reset by the extension and contraction of the hydraulic cylinder.
6. The test device for mobile extra-high voltage power test according to claim 1, wherein: the telescopic support legs can be outwards turned around the upper end to be attached to the outer sides of the side plates and the tail plates, and when the side plates and the tail plates are in an open platform state, the telescopic support legs are respectively perpendicular to the side plates and the tail plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710748746.4A CN107367675B (en) | 2017-08-28 | 2017-08-28 | Test device for mobile extra-high voltage power test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710748746.4A CN107367675B (en) | 2017-08-28 | 2017-08-28 | Test device for mobile extra-high voltage power test |
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| CN107367675A CN107367675A (en) | 2017-11-21 |
| CN107367675B true CN107367675B (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710748746.4A Active CN107367675B (en) | 2017-08-28 | 2017-08-28 | Test device for mobile extra-high voltage power test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109541410A (en) * | 2018-12-03 | 2019-03-29 | 国网宁夏电力有限公司电力科学研究院 | A kind of self-supporting impulse withstand voltage experimental rig |
| CN109399108A (en) * | 2018-12-07 | 2019-03-01 | 国网湖北省电力有限公司电力科学研究院 | A kind of vertical transfer shipping unit of integral type extra-high voltage experiment reactor |
| CN109375084A (en) * | 2018-12-07 | 2019-02-22 | 国网湖北省电力有限公司电力科学研究院 | Extra-high voltage GIS integrated Insulation Test platform based on SF6 insulation reactor |
| CN109375081A (en) * | 2018-12-07 | 2019-02-22 | 国网湖北省电力有限公司电力科学研究院 | Extra-high voltage GIS integrated Insulation Test platform based on oil-immersed electric reactor |
| CN111308132A (en) * | 2019-11-19 | 2020-06-19 | 中节能启源雷宇（江苏）电气科技有限公司 | Reactor voltage divider complex vehicle-mounted test platform |
| CN111071135A (en) * | 2019-12-27 | 2020-04-28 | 云南治邦科技有限公司 | Vehicle-mounted wingspan box body for high-voltage power test |
| CN111017836A (en) * | 2019-12-27 | 2020-04-17 | 云南治邦科技有限公司 | Lifting device for operation platform of high-voltage power test vehicle |
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