CN111017794B - Maintenance operation vehicle for off-line prevention switch equipment - Google Patents
Maintenance operation vehicle for off-line prevention switch equipment Download PDFInfo
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- CN111017794B CN111017794B CN201911385316.6A CN201911385316A CN111017794B CN 111017794 B CN111017794 B CN 111017794B CN 201911385316 A CN201911385316 A CN 201911385316A CN 111017794 B CN111017794 B CN 111017794B
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- 238000012423 maintenance Methods 0.000 title claims abstract description 21
- 230000002265 prevention Effects 0.000 title claims description 21
- 238000004804 winding Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 230000009471 action Effects 0.000 abstract description 6
- 230000002441 reversible effect Effects 0.000 abstract description 5
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/02—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
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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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Warehouses Or Storage Devices (AREA)
Abstract
The invention provides an anti-drop switch equipment maintenance operation vehicle, which comprises a vehicle frame, a longitudinal beam arranged on the vehicle frame, a carrying platform connected with the longitudinal beam in a sliding manner, an operation box arranged on the longitudinal beam, a winding drum arranged in the operation box, beam upper hanging wheels arranged at the top end of the longitudinal beam, carrying hanging wheels arranged on the carrying platform, and an anti-drop device arranged on the operation box, wherein the longitudinal beam is arranged on the vehicle frame; the wire-off preventing device comprises a hinged cross shaft, a swing arm connected with the hinged cross shaft, a wire-off wheel arranged on the swing arm, a tension spring for tensioning the swing arm and a wire-off preventing pawl arranged at one end of the hinged cross shaft; firstly, once the carrying platform contacts the frame, when the reverse rocking crank is continued, the steel wire rope is loosened, the ratchet and pawl are locked under the action of the tension spring, the reverse rocking crank cannot be continued, and the fault of the maintenance vehicle caused by the wire disconnection and even the winding disorder of the steel wire rope is avoided; and secondly, the labor-saving device is arranged between the wire-off preventing ratchet wheel and the winding drum, so that the labor is saved when the wire-off preventing ratchet wheel is positively shaken and reversely shaken, and the working labor intensity of workers is reduced.
Description
Technical Field
The invention relates to the technical field of switch equipment operation vehicles, aims to realize the moving in and out of a switch equipment in a protective box, and particularly relates to an anti-disconnection switch equipment maintenance operation vehicle.
Background
The switch equipment is named because arc extinguishing medium and insulating medium of contact gap after arc extinguishing are high vacuum; the high-voltage and low-voltage switch type equipment can be arranged in a middle-placed cabinet, a double-layer cabinet and a fixed cabinet to be used for controlling and protecting high-voltage electrical equipment.
Just as patent of application publication No. CN108321710A, a multifunctional handcart type circuit breaker maintenance vehicle (subsequently referred to as prior art patent), wherein a circuit breaker body of a handcart type circuit breaker of a core component of a centrally installed switchgear and a handcart operating mechanism (chassis vehicle) are in a form of an upper and lower unit structure, the mass of handcart type circuit breakers of different models and specifications is approximately 200 kg to 300 kg, the combination mode of the body and the chassis operating mechanism is that the body and the chassis operating mechanism are fixed at the bottom of a handcart of the circuit breaker by screws, the circuit breaker needs to be safely maintained and maintained in a rated working period or in case of failure, the circuit breaker and a cabinet body need to be completely separated and removed under normal conditions, a special operating trolley is connected and removed from the interior of the circuit breaker, that is, the switchgear is placed in the centrally installed switchgear, double-layer and fixed cabinets, the maintenance operating vehicle is moved in and out through a switch type equipment maintenance vehicle, just as the prior art patent states, the prior art scheme uses at the scene, the adaptation wide, the simple operation, the comprehensive performance, safe and reliable's device deals with maintenance work, can make the maintenance work efficiency very big improvement, accomplishes the job task with the very short time cycle, light operation flow, safe measure step, and the applicant thinks prior art has satisfied the operation requirement to a certain extent.
Because the reason such as the emergency rescue that regularly overhauls, the accident takes place, switch class equipment overhauls the operation car must ensure the safe and reliable of overall performance, and switch class equipment overhauls the operation car and realizes the raising and lowering functions through the steel wire winding on the cylinder, and the applicant finds in the use of prior art product has following problem: firstly, when the hand is rotated clockwise, the crank handle is more useless, and the labor intensity of operators is increased; secondly, the cubical switchboard can move down during counter-clockwise turning, when moving down when the carrying platform drops to the lowest position, because the urgent need cubical switchboard moves down operating personnel still can continue anticlockwise hand crank, the problem of production is that the coil on the cylinder can be disturbed owing to continuously shaking the crank, the consequence of production is lighter, the vibration of carrying platform card when ascending once more, this vibration is very easily damaged the cubical switchboard, whole wire winding can be disturbed even to the serious person, this needs to unpack the cylinder outside the device and rewinds the line, this process is time-consuming and hard, the unable normal use of maintenance operation car delays and puts normal work, can cause serious accident loss even in the rescue operation, this two point problems need to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problems that switch equipment maintenance operation vehicles in the prior art are labor-consuming when rotating clockwise and are anti-off-line when rotating anticlockwise.
The technical scheme of the invention is realized as follows: an anti-drop wire switch equipment maintenance operation vehicle comprises a vehicle frame, a longitudinal beam arranged on the vehicle frame, a carrying platform connected with the longitudinal beam in a sliding manner, an operation box arranged on the longitudinal beam, a winding roller arranged in the operation box, a beam upper hanging wheel arranged at the top end of the longitudinal beam, a carrying hanging wheel arranged on the carrying platform, and an anti-drop wire device arranged on the operation box; the wire-releasing prevention device comprises a hinged cross shaft, a swing arm connected with the hinged cross shaft, a wire-releasing wheel arranged on the swing arm, a tension spring for tensioning the swing arm, and a wire-releasing prevention pawl arranged at one end of the hinged cross shaft, wherein one end of a steel wire rope is connected to the top end of the longitudinal beam, and the other end of the steel wire rope bypasses the carrying hanging wheel, the wire-releasing wheel and the beam hanging wheel to be connected with the winding drum; the shaft of the winding drum is provided with a labor-saving device, a wire-off preventing ratchet wheel and a crank from inside to outside.
Preferably, the labor-saving device comprises a driving shaft, a pinion arranged on the driving shaft, a middle gear meshed with the pinion, a shaft sleeve meshed with the middle gear, an output end gear meshed with the shaft sleeve, and an output shaft connected with the output end gear.
Preferably, the output shaft is connected with a shaft of the winding drum, and the driving shaft is connected with the crank through the wire-off prevention ratchet wheel.
Preferably, the carrying platform is provided with sliding wheels which are clamped on the longitudinal beam, and the combination mode is more stable in up-and-down running.
Preferably, the longitudinal beam is provided with an operation ladder, so that the vertical operation is convenient.
Preferably, the longitudinal beam is provided with a rope binding box, so that the steel wire rope is bound, the steel wire rope is prevented from swinging too much, the precision of the anti-falling device is prevented from being influenced, and even the anti-falling device is easy to break down.
The invention discloses a wire-off prevention principle, which is characterized in that when the wire-off prevention mechanism is used, a switch cabinet is placed on a carrying platform, when a hand crank rotates clockwise, a steel wire rope is wound on a winding drum, the steel wire rope is arranged along an upper beam hanging wheel, a wire-off wheel, a carrying hanging wheel and the top end of a longitudinal beam, the steel wire rope is in a pulling-in state under the action of the gravity of the switch cabinet, the upper beam hanging wheel and the wire-off wheel are in a straight state at the moment, a swing arm is pulled to one side far away from the crank, a wire-off prevention pawl is upwarped at the moment, a tension spring is elongated, a wire-off prevention ratchet wheel can rotate clockwise along with the crank, the carrying platform is gradually lifted to lift the carrying cabinet to a designated position, and the lifting process is realized. In the descending process, as long as the switch cabinet does not descend to the lowest end, the carrying platform is not contacted with the frame, the anti-falling wire pawl is tilted up at the moment, the tension spring is elongated, the anti-falling wire ratchet can rotate anticlockwise along with the crank, the carrying platform continuously descends, but after the carrying platform is contacted with the frame, the gravity of the switch cabinet falls on the frame at the moment, downward tension force is not generated, the steel wire rope can become loose immediately, under the action of the tension spring, the swing arm is drawn close to one side close to the crank, meanwhile, the anti-falling wire pawl rotates clockwise to be clamped on the anti-falling wire ratchet, the crank can not rotate anticlockwise any more, the steel wire rope on the winding drum caused by excessively reversing the crank is effectively prevented from being loosened and even knotted, and the technical problem of abnormal use is solved.
When clockwise turning, the hand comparison of prior art crank is laboursome, one set of laborsaving device has been introduced here, when rotatory, the crank drives the drive shaft, the pinion is rotatory, the well gear of meshing with it then changes this moment, it changes in step to drive the axle sleeve, this is driven the laborsaving drive mechanism of gear wheel by the pinion promptly, follow-up axle sleeve drives output gear and output shaft and rotates, the output shaft drives the wire winding cylinder and rotates and wire winding or counter-wound, the cooperation of multistage gear structure lets equipment more laborsaving.
The beneficial effects of the invention are simply and incompletely summarized as follows: firstly, once the carrying platform contacts the frame, when the reverse rocking crank is continued, the steel wire rope is loosened, the ratchet and pawl are locked under the action of the tension spring, the reverse rocking crank cannot be continued, and the fault of the maintenance vehicle caused by the wire disconnection and even the winding disorder of the steel wire rope is avoided; secondly, the labor-saving device is arranged between the wire-off preventing ratchet wheel and the winding drum, and the forward shaking and the backward shaking are labor-saving, so that the working labor intensity of workers is reduced; thirdly, the sliding wheel structure is ensured to be tightly combined with the longitudinal beam, the ascending and descending carrying platform is more stable, the vibration is reduced, and the protection switch cabinet is facilitated.
Drawings
FIG. 1 is a schematic view of the overall structure of an inspection and repair operating vehicle for an anti-disconnection switch device of the present invention;
FIG. 2 is a schematic connection diagram of a rope structure of an inspection and repair operation vehicle for the anti-drop switch equipment of the invention;
FIG. 3 is a schematic view of a protruded wire-off preventing device of a maintenance operation vehicle for a wire-off preventing switch equipment of the invention;
fig. 4 is an enlarged schematic view of a portion a in fig. 3.
Fig. 5 is a schematic structural view of a part of the wire-off preventing device of the wire-off preventing switch equipment maintenance operation vehicle.
FIG. 6 is a schematic structural view of a labor-saving device of an overhaul operation vehicle for an anti-disconnection switch device.
FIG. 7 is a schematic sectional view of a labor-saving device of an inspection vehicle for an anti-disconnection switch type equipment of the present invention.
The automatic wire releasing device comprises a frame 1, a longitudinal beam 2, a carrying platform 3, a sliding wheel 31, an operation box 4, a winding roller 5, a beam upper hanging wheel 6, a carrying hanging wheel 7, a wire releasing prevention device 8, a hinged cross shaft 81, a swing arm 82, a wire releasing wheel 83, a tension spring 84, an anti-wire releasing pawl 85, a wire rope 9, a labor saving device 10, a driving shaft 101, a pinion 102, a middle gear 103, a shaft sleeve 104, an output end gear 105, an output shaft 106, an anti-wire releasing ratchet 12, a crank 13, an operation ladder 14 and a wire restraining box 15.
Detailed Description
In order to further understand the present invention, the following detailed description will be made on an inspection vehicle for a disconnecting switch device according to the present invention with reference to the examples and the accompanying drawings, and the examples are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
As shown in fig. 1 to 7, an operation vehicle for overhauling a disconnecting-proof switch device comprises a vehicle frame 1, a longitudinal beam 2 arranged on the vehicle frame 1, a carrying platform 3 connected with the longitudinal beam 2 in a sliding manner, an operation box 4 arranged on the longitudinal beam 2, a winding roller 5 arranged in the operation box 4, a beam upper hanging wheel 6 arranged at the top end of the longitudinal beam 2, a carrying hanging wheel 7 arranged on the carrying platform 3, and a disconnecting-proof device 8 arranged on the operation box 4; the wire-off preventing device 8 comprises a hinged cross shaft 81, a swing arm 82 connected with the hinged cross shaft 81, a wire-off wheel 83 arranged on the swing arm 82, a tension spring 84 for tensioning the swing arm 82, and a wire-off preventing pawl 85 arranged at one end of the hinged cross shaft 81, wherein one end of a steel wire rope 9 is connected to the top end of the longitudinal beam 2, and the other end of the steel wire rope bypasses the carrying hanging wheel 7, the wire-off wheel 83 and the beam hanging wheel 6 to be connected with the winding drum 5; a shaft of the winding drum 5 is provided with a labor saving device 10, an anti-off ratchet wheel 12 and a crank 13 from inside to outside; the labor-saving device 10 comprises a driving shaft 101, a pinion 102 arranged on the driving shaft 101, a middle gear 103 meshed with the pinion 102, a shaft sleeve 104 meshed with the middle gear 103, an output end gear 105 meshed with the shaft sleeve 104 and an output shaft 106 connected with the output end gear 105; the output shaft 106 is connected with the shaft of the winding drum 5, and the driving shaft 101 is connected with the crank 13 through the wire-off prevention ratchet wheel 12; the carrying platform 3 is provided with a sliding wheel 31, and the sliding wheel 31 is clamped on the longitudinal beam 2; an operation ladder 14 is arranged on the longitudinal beam 2; and the longitudinal beam 2 is provided with a rope binding box 15.
The invention discloses a principle of wire-separation prevention, when the wire-separation prevention lifting device is used, a switch cabinet is placed on a carrying platform 3, when a hand crank 13 rotates clockwise, a steel wire rope 9 is wound on a winding drum 5, the steel wire rope 9 is arranged along the beam upper hanging wheel, a wire-separation wheel 83, a carrying hanging wheel 7 and the top end of a longitudinal beam, the steel wire rope 9 is in a pulling-in state under the action of the gravity of the switch cabinet, the beam upper hanging wheel and the wire-separation wheel 83 are in a straight state, a swing arm 82 is pulled to one side far away from the crank 13, a wire-separation prevention pawl 85 is upwarped at the moment, a tension spring 84 is lengthened, a wire-separation prevention ratchet wheel 12 can rotate clockwise along with the crank 13, the carrying platform 3 is gradually lifted to a specified position, and the lifting process is realized. In the descending process, as long as the switch cabinet does not descend to the lowest end, namely the carrying platform is not contacted with the frame 1, the anti-falling wire pawl 85 is still upwarped at the moment, the tension spring 84 is elongated, the anti-falling wire ratchet wheel 12 can rotate anticlockwise along with the crank 13, the carrying platform 3 continuously descends, but after the carrying platform is contacted with the frame 1, the gravity of the switch cabinet falls on the frame 1 at the moment, downward tension force does not exist, the steel wire rope 9 immediately loosens, under the action of the tension spring 84, the swing arm 82 is drawn close to one side close to the crank 13, meanwhile, the anti-falling wire pawl 85 rotates clockwise and is clamped on the anti-falling wire ratchet wheel 12, the crank 13 cannot rotate anticlockwise any more, and the technical problem that the steel wire rope 9 on the winding drum 5 is even loosened and knotted due to excessive reverse rotation of the crank is effectively solved, and the technical problem of incapability of normal use is solved.
When clockwise turning, the hand comparison of prior art crank is laboursome, one set of laborsaving device 10 has been introduced here, when rotatory, crank 13 drives drive shaft 101, pinion 102 is rotatory, the well gear 103 with it meshing is then changeed this moment, it changes to drive axle sleeve 104 synchronous, this is the laborsaving drive mechanism who drives the gear wheel by the pinion promptly, follow-up axle sleeve 104 drives output gear 105 and output shaft 106 and rotates, output shaft 106 drives winding drum 5 and rotates and wire winding or counter-wound, the cooperation of multistage gear structure lets equipment more laborsaving.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. An anti-drop switch equipment maintenance operation vehicle is characterized by comprising a vehicle frame (1), a longitudinal beam (2) arranged on the vehicle frame (1), a carrying platform (3) connected with the longitudinal beam (2) in a sliding manner, an operation box (4) arranged on the longitudinal beam (2), a winding roller (5) arranged in the operation box (4), a beam upper hanging wheel (6) arranged at the top end of the longitudinal beam (2), a carrying hanging wheel (7) arranged on the carrying platform (3), and an anti-drop device (8) arranged on the operation box (4);
the anti-drop device (8) comprises a hinged cross shaft (81), a swing arm (82) connected with the hinged cross shaft (81), a wire-dropping wheel (83) arranged on the swing arm (82), a tension spring (84) for tensioning the swing arm (82), and an anti-drop pawl (85) arranged at one end of the hinged cross shaft (81), wherein one end of a steel wire rope (9) is connected to the top end of the longitudinal beam (2), and the other end of the steel wire rope bypasses the carrying hanging wheel (7), the wire-dropping wheel (83), and the beam upper hanging wheel (6) and is connected with the wire-winding drum (5); a labor saving device (10), a wire falling-proof ratchet wheel (12) and a crank (13) are arranged on the shaft of the winding drum (5) from inside to outside; the anti-off-line ratchet wheel (12) is arranged on one side of the anti-off-line pawl (85), when the steel wire rope (9) is in a stressed state, the swing arm (82) faces to one side far away from the crank (13), and the anti-off-line pawl (85) is not in contact with the anti-off-line ratchet wheel (12); when the steel wire rope (9) is in a relaxed state, the swing arm (82) faces to one side close to the crank (13), and the wire falling prevention pawl (85) is inserted into a tooth groove of the wire falling prevention ratchet wheel (12).
2. The maintenance operation vehicle for the disconnection preventing switch equipment as claimed in claim 1, wherein the labor saving device (10) comprises a driving shaft (101), a pinion (102) arranged on the driving shaft (101), a middle gear (103) meshed with the pinion (102), a shaft sleeve (104) meshed with the middle gear (103), an output end gear (105) meshed with the shaft sleeve (104), and an output shaft (106) connected with the output end gear (105).
3. The maintenance operating cart for devices of the disconnecting prevention switch type according to claim 2, characterized in that the output shaft (106) is connected with the shaft of the winding drum (5), and the driving shaft (101) is connected with the crank (13) through the disconnecting prevention ratchet wheel (12).
4. The maintenance operating vehicle for equipment of the disconnecting prevention switch type according to claim 3, characterized in that the carrying platform (3) is provided with a sliding wheel (31), and the sliding wheel (31) is clamped on the longitudinal beam (2).
5. The operating vehicle for overhauling of disconnecting prevention switch equipment as claimed in claim 4, wherein the longitudinal beam (2) is provided with an operating ladder (14).
6. The maintenance operation vehicle for the disconnection-preventing switch equipment according to claim 5, characterized in that the longitudinal beam (2) is provided with a rope binding box (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911385316.6A CN111017794B (en) | 2019-12-28 | 2019-12-28 | Maintenance operation vehicle for off-line prevention switch equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911385316.6A CN111017794B (en) | 2019-12-28 | 2019-12-28 | Maintenance operation vehicle for off-line prevention switch equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111017794A CN111017794A (en) | 2020-04-17 |
| CN111017794B true CN111017794B (en) | 2021-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911385316.6A Active CN111017794B (en) | 2019-12-28 | 2019-12-28 | Maintenance operation vehicle for off-line prevention switch equipment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113131379B (en) * | 2021-04-16 | 2024-05-28 | 国网山东省电力公司淄博供电公司 | 10KV handcart switch is from shaking into and shake out formula maintenance car with adjustable |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201040535Y (en) * | 2007-05-18 | 2008-03-26 | 厦门Abb开关有限公司 | Planet structural type lifting service barrow |
| CN100526203C (en) * | 2007-11-09 | 2009-08-12 | 刘清华 | Liftable hand propelled carrying vehicle |
| CA2676579A1 (en) * | 2009-08-14 | 2011-02-14 | Pierre Tremblay | Platform elevator |
| US8875844B2 (en) * | 2010-10-14 | 2014-11-04 | Murray W. Janz | Lifting device for storing a personal vehicle on a vehicle dolly thereon |
| CN202423897U (en) * | 2011-09-21 | 2012-09-05 | 山西太钢不锈钢股份有限公司 | High-voltage cabinet maintenance lift truck for power substation |
| CN104355270A (en) * | 2014-10-18 | 2015-02-18 | 倪云飞 | Light tilting-type rapid elevating forklift truck |
| CN204528987U (en) * | 2014-11-28 | 2015-08-05 | 者宸旭 | Ratchet type safety protective device |
| CN205811377U (en) * | 2016-05-25 | 2016-12-14 | 国网宁夏电力公司石嘴山供电公司 | Multi-function hand-cart overhaul platform of circuit breaker |
| CN106629466A (en) * | 2016-12-01 | 2017-05-10 | 苏州市职业大学 | Rapid and convenient loading and unloading truck |
| CN206529243U (en) * | 2017-01-19 | 2017-09-29 | 新乡市豫拓科技有限公司 | A kind of chain-type riser guide platform |
| CN106965838B (en) * | 2017-05-17 | 2018-11-06 | 国网山东省电力公司潍坊供电公司 | Security tool stores and carries transfer device |
| CN109066420A (en) * | 2018-08-30 | 2018-12-21 | 国网河南省电力公司南召县供电公司 | A kind of handcart type breaker apparatus for examination and repair |
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