CN110844851A - Power equipment overhauls and maintains device for artificial intelligence ization - Google Patents
Power equipment overhauls and maintains device for artificial intelligence ization Download PDFInfo
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- CN110844851A CN110844851A CN201911139410.3A CN201911139410A CN110844851A CN 110844851 A CN110844851 A CN 110844851A CN 201911139410 A CN201911139410 A CN 201911139410A CN 110844851 A CN110844851 A CN 110844851A
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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
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
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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
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
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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)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses an artificial intelligent power equipment overhauling and maintaining device which comprises a base, wherein an annular baffle is connected onto the base, a plurality of fixing columns are uniformly and vertically arranged on the annular baffle, a protective mechanism is arranged between every two adjacent fixing columns, the upper ends of the fixing columns are commonly connected with a traction block through a traction rope, a communication cavity is inserted into the base, the center of the base is provided with the communication cavity, and the base is uniformly provided with a plurality of mounting grooves communicated with the communication cavity. According to the maintenance platform, the maintenance platform can be automatically balanced through the balance mechanism according to the movement of the maintenance personnel, the stability of the maintenance platform is kept, the operation efficiency of the maintenance personnel is improved, meanwhile, a counterweight seat is not required to be additionally arranged at the bottom of the maintenance platform, the energy consumption of a crane is reduced, the safety performance of the maintenance platform can be further improved through the protection mechanism, meanwhile, the protection mechanism can be freely adjusted, and the maintenance platform is convenient to use.
Description
Technical Field
The invention relates to the technical field of equipment maintenance, in particular to an electric power equipment maintenance device for artificial intelligence.
Background
Electric power equipment in an electric power system is many, and they are generally divided into primary electric power equipment and secondary electric power equipment according to their roles in operation, and equipment that directly participates in production, conversion, transmission, distribution, and consumption of electric energy is called primary electric power equipment, and equipment that measures, monitors, controls, and adjusts its operation state in order to ensure normal operation of primary electric power equipment is called secondary electric power equipment.
No matter the electric power primary equipment or the electric power secondary equipment is used, in order to ensure the normal operation of an electric power system, the electric power system needs to be overhauled and maintained regularly, a plurality of electric equipment needs to be installed at a higher position usually for working, when the electric power equipment is overhauled and maintained, the overhauling platform is often required to be lifted to the overhauling position by using a crane, when the existing overhauling platform is used, the overhauling platform is prevented from inclining when an overhauling person moves the overhauling platform, the bottom of the overhauling platform is generally provided with a heavier counterweight block so as to reduce the integral gravity center of the overhauling platform and improve the stability of the overhauling platform, however, the overhauling platform is required to be matched with a high-power crane when in use, the energy consumption is larger, in addition, the position of a protective net is generally fixed when the existing overhauling platform is used, and a user cannot adjust the protective net, thereby bringing certain influence to the overhaul and maintenance of the maintainers and even the life safety.
Disclosure of Invention
The invention aims to solve the defects that an electric power equipment overhauling platform is inconvenient to use and poor in stability when a crane is used for overhauling high-altitude electric power equipment in the prior art, and provides an artificial intelligent electric power equipment overhauling and maintaining device.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an artificial intelligence is with power equipment overhaul and maintenance device, includes the base, be connected with ring baffle on the base, ring baffle is last evenly vertically to install many fixed columns, adjacent two be equipped with protection machanism between the fixed column, many the fixed column upper end is connected with the traction block through the haulage rope jointly, base central point puts and has seted up the intercommunication chamber, evenly set up a plurality of mounting grooves that communicate with the intercommunication chamber on the base, every all be equipped with balance mechanism in the mounting groove.
Preferably, the balance mechanism includes the standing groove that the base up end was seted up, rotate through the round pin axle on the cell wall that the standing groove is close to the intercommunication chamber and install the footboard, the footboard lower extreme is connected with the threaded rod through the swing mechanism, the cover is equipped with the spring on the threaded rod, the vertical mounting hole of having seted up between standing groove and the mounting groove, rotate through the bearing in the mounting hole and install the thread bush, threaded rod lower part and thread bush threaded connection, the thread bush lower extreme extends to the mounting groove and rotates through the bearing and installs on the mounting groove diapire, interference fit has the gear on the thread bush, install the adjustable frame through slide mechanism in the mounting groove, the adjustable frame in-connection have with gear engagement's pinion rack, sliding connection has the balancing weight in the mounting groove, be connected with the connecting.
Preferably, the movable mechanism comprises a first sliding groove formed in the lower end of the pedal, a sliding seat is connected in the first sliding groove in a sliding mode, and the upper end of the threaded rod is rotatably connected with the sliding seat.
Preferably, the sliding mechanism comprises two second sliding grooves symmetrically formed in the mounting groove, a plurality of rollers are symmetrically mounted on the movable frame, and the plurality of rollers are in sliding connection with the corresponding second sliding grooves.
Preferably, the protection mechanism comprises a limiting groove and a transmission groove which are respectively formed in two adjacent fixed columns, movable rods matched with the annular baffle are respectively arranged in the limiting groove and the transmission groove through a limiting mechanism and a lifting mechanism, and a protection net is fixed between the lower ends of the movable rods and the upper end of the annular baffle.
Preferably, elevating system includes the ball that passes through the vertical rotation installation of bearing in the drive groove, sliding connection has screw nut on the ball, and the one end and the screw nut fixed connection of movable rod, the drive groove lower part is connected with the handle through drive mechanism.
Preferably, drive mechanism includes the gear groove of seting up on the transmission groove, the transmission shaft is installed to gear inslot rotation, and the transmission shaft keeps away from the one end and the handle fixed connection in gear groove, fixed cover is equipped with the second bevel gear on the transmission shaft, interference fit has first bevel gear on the ball, and first bevel gear and second bevel gear meshing.
Preferably, the limiting mechanism comprises a polished rod vertically connected in a limiting groove, a sliding block is connected to the polished rod in a sliding mode, and one end, far away from the screw nut, of the movable rod is fixedly connected with the sliding block.
The invention has the beneficial effects that:
1. through balance mechanism, when the maintainer moves towards a certain direction on the base, step on and correspond the footboard, the footboard drives the balancing weight that corresponds in the mounting groove and moves towards opposite direction with the maintainer to can realize the balance of base, avoid overhauing the slope of platform, thereby keep overhauing the stability of platform, simultaneously, this overhauls the platform and need not to set up extra counter weight base, has alleviateed the gravity of overhauing platform self, has reduced the energy consumption of crane.
2. Through protection machanism, when can overhaul the maintenance operation to the maintainer, play the guard action, improved the safe line of overhauing the platform.
3. Through adjustment mechanism and stop gear's cooperation, the maintainer rotates the height to the protection network that just can be very convenient to adjust of handle, very big has made things convenient for maintainer's maintenance operation.
4. Through slide mechanism, reduced the frictional force between movable frame and the mounting groove for the motion of movable frame is more smooth and easy, can not cause the influence to the transmission of gear and pinion rack, and balance mechanism's response speed is faster.
5. Through evenly set up a plurality of balance mechanism along radial on the base, when the maintainer moved along arbitrary direction, balance mechanism can both play the balancing act to the motion of maintainer, and the suitability is strong.
6. The spring is established through the cover on the threaded rod, and when overhauing the end, maintainer got back to base central line department, the footboard drove the threaded rod under the elastic force effect of spring and resets, and the threaded rod drives the balancing weight through thread bush, gear, adjustable frame, pinion rack and connecting rod and resets to make things convenient for maintainer to operate the power equipment of each position, use in a flexible way.
In conclusion, the maintenance platform can be automatically balanced through the balance mechanism according to the movement of the maintenance personnel, the stability of the maintenance platform is kept, the operation efficiency of the maintenance personnel is improved, meanwhile, a counterweight seat is not required to be additionally arranged at the bottom of the maintenance platform, the energy consumption of a crane is reduced, the safety performance of the maintenance platform can be further improved through the protection mechanism, meanwhile, the protection mechanism can be freely adjusted, and the maintenance platform is convenient to use.
Drawings
Fig. 1 is a schematic structural diagram of a base in an artificial intelligence electric power equipment overhaul and maintenance device provided by the invention;
fig. 2 is a schematic structural diagram of a balancing mechanism in an artificial intelligence electric power equipment overhaul and maintenance device provided by the invention;
FIG. 3 is an enlarged view of FIG. 1 at A;
FIG. 4 is an enlarged view of FIG. 2 at B;
fig. 5 is a schematic structural diagram of a protection mechanism in an artificial intelligence electric power equipment overhaul and maintenance device provided by the invention;
fig. 6 is an external structural schematic diagram of a protection mechanism in an artificial intelligence electric power equipment overhaul and maintenance device provided by the invention;
FIG. 7 is a schematic structural diagram of a balancing mechanism in an artificial intelligence electric power equipment overhaul and maintenance device according to the present invention;
fig. 8 is an external structural schematic diagram of an artificial intelligence electric power equipment overhaul and maintenance device provided by the invention.
In the figure, 1 a base, 2 annular baffles, 3 a communication cavity, 4 mounting grooves, 5 balancing weights, 6 placing grooves, 7 pedals, 8 first sliding grooves, 9 springs, 10 threaded rods, 11 threaded sleeves, 12 gears, 13 movable frames, 14 toothed plates, 15 connecting rods, 16 second sliding grooves, 17 rollers, 18 fixed columns, 19 traction ropes, 20 limiting grooves, 21 polished rods, 22 sliding blocks, 23 transmission grooves, 24 lead screw nuts, 25 movable rods, 26 ball screws, 27 first bevel gears, 28 second bevel gears, 29 handles, 30 protective nets, 31 traction blocks and 32 opening and closing doors are arranged.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-8, an artificial intelligence is with power equipment overhaul and maintenance device, including base 1, the welding has ring baffle 2 on base 1, there is the switch door 32 that is used for the maintainer to pass in and out through hinged joint on ring baffle 2, even vertical many fixed columns 18 of installing on ring baffle 2, the lower extreme of every fixed column 18 all extend to base 1 on and with base 1 fixed connection, be equipped with protection machanism between two adjacent fixed columns 18, many fixed column 18 upper ends are connected with traction block 31 through haulage rope 19 jointly, base 1 central point puts and has seted up circular intercommunication chamber 3, evenly set up a plurality of mounting grooves 4 with intercommunication chamber 3 intercommunication on the base 1, all be equipped with balance mechanism in every mounting groove 4, the quantity of mounting groove 4 is preferably eight, every mounting groove 4 all radially outwards launches the distribution along base 1.
In the invention, the balancing mechanism comprises a placing groove 6 arranged on the upper end surface of a base 1, a pedal 7 is rotatably arranged on the groove wall of the placing groove 6 close to a communicating cavity 3 through a pin shaft, a corrugated pipe (not shown in the figure) is connected between the side wall of the pedal 7 and the base 1, the corrugated pipe can prevent maintenance tools and sundries on the base 1 from falling into the placing groove 6, thereby influencing the normal use of the device, the lower end of the pedal 7 is connected with a threaded rod 10 through a movable mechanism, a spring 9 is sleeved on the threaded rod 10, a mounting hole is vertically arranged between the placing groove 6 and a mounting groove 4, a threaded sleeve 11 is rotatably arranged in the mounting hole through a bearing, the lower part of the threaded rod 10 is in threaded connection with the upper part of the threaded sleeve 11, the lower end of the threaded sleeve 11 extends to the mounting groove 4 and is rotatably arranged on the bottom, a toothed plate 14 meshed with the gear 12 is connected in the movable frame 13, a balancing weight 5 is connected in the mounting groove 4 in a sliding manner, a connecting rod 15 is connected on the movable frame 13, one end, far away from the movable frame 13, of the connecting rod 15 is connected with the balancing weight 5 through a chain, and smooth layers are arranged on the side walls, in contact with the balancing weight 5, of the mounting groove 4 and the balancing weight 5 and used for reducing friction between the balancing weight 5 and the mounting groove 4;
the movable mechanism comprises a first sliding chute 8 which is formed in one end, close to the annular baffle 2, of the lower end face of the pedal 7, a sliding seat is connected in the first sliding chute 8 in a sliding mode, the upper end of a threaded rod 10 is rotatably connected with the sliding seat through a pin shaft, and the upper end and the lower end of a spring 9 are respectively connected to the bottom walls of the sliding seat and the placing groove 6;
the sliding mechanism comprises two second sliding grooves 16 symmetrically formed in the mounting groove 4, a plurality of idler wheels 17 are symmetrically mounted on the movable frame 13, and the idler wheels 17 are in sliding connection with the corresponding second sliding grooves 16;
the protection mechanism comprises a limiting groove 20 and a transmission groove 23 which are respectively vertically arranged on two adjacent fixed columns 18, arc-shaped movable rods 25 matched with the annular baffle 2 are respectively arranged in the limiting groove 20 and the transmission groove 23 through a limiting mechanism and a lifting mechanism, a protective net 30 is fixed between the lower end of each movable rod 25 and the upper end of the annular baffle 2, and the protective net 30 is formed by weaving stainless steel wires;
the lifting mechanism comprises a ball screw 26 vertically and rotatably arranged in the transmission groove 23 through a bearing, the ball screw 26 is connected with a screw nut 24 in a sliding manner, one end of a movable rod 25 is fixedly connected with the screw nut 24, and the lower part of the transmission groove 23 is connected with a handle 29 through a transmission mechanism;
the transmission mechanism comprises a gear groove formed in the transmission groove 23, a transmission shaft is rotatably mounted in the gear groove, one end, far away from the gear groove, of the transmission shaft is fixedly connected with a handle 29, the handle 29 is convenient to use by adopting a crank, a second bevel gear 28 is fixedly sleeved on the transmission shaft, a first bevel gear 27 is in interference fit with the ball screw 26, and the first bevel gear 27 is meshed with the second bevel gear 28;
the limiting mechanism comprises a polish rod 21 vertically connected in a limiting groove 20, a sliding block 22 is connected on the polish rod 21 in a sliding mode, and one end, far away from a lead screw nut 24, of a movable rod 25 is fixedly connected with the sliding block 22.
When the device is used, the traction block 31 is fixed on a hook of a crane, the crane lifts the device to a working platform, when an overhaul person moves towards a certain direction on the base 1, the pedal 7 in the corresponding direction is stepped, the pedal 7 is pressed to rotate and extrudes the spring 9, the pedal 7 rotates to drive the sliding seat to slide upwards in the first sliding chute 8, meanwhile, the sliding seat drives the threaded rod 10 to move downwards, the threaded rod 10 drives the threaded sleeve 11 to rotate, the threaded sleeve 11 drives the gear 12 to rotate, as the movable frame 13 is in sliding connection with the second sliding chute 16 through the plurality of rollers 17, the gear 12 drives the movable frame 13 to move through the toothed plate 14, the movable frame 13 drives the counterweight block 5 to move towards the direction opposite to the overhaul person through the connecting rod 15, referring to fig. 7, when the overhaul person moves, the position of the corresponding counterweight block 5 is changed, so as to realize new balance, and the whole maintenance platform is not easy to incline, after the maintenance is finished, the maintenance personnel returns to the central line of the base 1, at the moment, the pedal 7 drives the threaded rod 10 to reset under the elastic force action of the spring 9, so that the threaded sleeve 11 is driven to rotate reversely, and the threaded sleeve 11 drives the balancing weight 5 to reset through the gear 12, the movable frame 13, the toothed plate 14 and the connecting rod 15;
when the maintenance personnel need to adjust the protection net 30, the handle 29 is rotated, the handle 29 drives the second bevel gear 28 to rotate through the transmission shaft, the second bevel gear 28 drives the first bevel gear 27 to rotate, the first bevel gear 27 drives the ball screw 26 to rotate, the ball screw 26 drives the screw nut 24 to slide up and down on the ball screw 26, then the screw nut 24 cooperates with the sliding block 22 to drive the movable rod 25 to move up and down, the movable rod 25 drives the upper end of the protection net 30 to move, thereby playing a role in adjusting the protection net 30, and the operation is simple.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides an artificial intelligence is with power equipment overhaul and maintenance device, includes base (1), its characterized in that, be connected with ring baffle (2) on base (1), even vertical many fixed columns (18) of installing on ring baffle (2), adjacent two be equipped with protection machanism between fixed column (18), many fixed column (18) upper end is connected with carry over pinch (31) jointly through haulage rope (19), base (1) central point puts and has seted up intercommunication chamber (3), evenly set up a plurality of mounting groove (4) that communicate with intercommunication chamber (3) on base (1), every all be equipped with balance mechanism in mounting groove (4).
2. The artificial intelligent electrical equipment overhauling and maintaining device according to claim 1, wherein the balance mechanism comprises a placing groove (6) formed in the upper end surface of the base (1), a pedal (7) is rotatably mounted on the groove wall of the placing groove (6) close to the communicating cavity (3) through a pin shaft, the lower end of the pedal (7) is connected with a threaded rod (10) through a movable mechanism, a spring (9) is sleeved on the threaded rod (10), a mounting hole is vertically formed between the placing groove (6) and the mounting groove (4), a threaded sleeve (11) is rotatably mounted in the mounting hole through a bearing, the lower part of the threaded rod (10) is in threaded connection with the threaded sleeve (11), the lower end of the threaded sleeve (11) extends to the mounting groove (4) and is rotatably mounted on the bottom wall of the mounting groove (4) through the bearing, a gear (12) is in interference fit on the threaded sleeve (11), install movable frame (13) through slide mechanism in mounting groove (4), movable frame (13) in-connection have with gear (12) meshing pinion rack (14), sliding connection has balancing weight (5) in mounting groove (4), be connected with connecting rod (15) between balancing weight (5) and movable frame (13).
3. The manual intelligent electric equipment overhauling and maintaining device as recited in claim 2, wherein the movable mechanism comprises a first sliding groove (8) formed in the lower end of the pedal (7), a sliding seat is slidably connected in the first sliding groove (8), and the upper end of the threaded rod (10) is rotatably connected with the sliding seat.
4. The artificial intelligence electric equipment overhaul and maintenance device according to claim 2, wherein the sliding mechanism comprises two second sliding grooves (16) symmetrically formed in the mounting groove (4), a plurality of rollers (17) are symmetrically mounted on the movable frame (13), and the plurality of rollers (17) are slidably connected with the corresponding second sliding grooves (16).
5. The artificial intelligence electric power equipment overhauling and maintaining device according to claim 1, wherein the protection mechanism comprises a limiting groove (20) and a transmission groove (23) which are respectively formed on two adjacent fixed columns (18), a movable rod (25) matched with the annular baffle (2) is respectively installed in the limiting groove (20) and the transmission groove (23) through a limiting mechanism and a lifting mechanism, and a protective net (30) is fixed between the lower end of the movable rod (25) and the upper end of the annular baffle (2).
6. The electric equipment overhaul and maintenance device for artificial intelligence is characterized in that the lifting mechanism comprises a ball screw (26) vertically and rotatably mounted in a transmission groove (23) through a bearing, a screw nut (24) is slidably connected onto the ball screw (26), one end of a movable rod (25) is fixedly connected with the screw nut (24), and a handle (29) is connected to the lower portion of the transmission groove (23) through the transmission mechanism.
7. The manual intelligent electric equipment overhaul and maintenance device according to claim 5, wherein the transmission mechanism comprises a gear groove formed in the transmission groove (23), a transmission shaft is rotatably mounted in the gear groove, one end, far away from the gear groove, of the transmission shaft is fixedly connected with a handle (29), a second bevel gear (28) is fixedly sleeved on the transmission shaft, a first bevel gear (27) is in interference fit with the ball screw (26), and the first bevel gear (27) is meshed with the second bevel gear (28).
8. The manual intelligent electric equipment overhaul and maintenance device according to claim 5, wherein the limiting mechanism comprises a polished rod (21) vertically connected in a limiting groove (20), a sliding block (22) is connected on the polished rod (21) in a sliding manner, and one end, far away from the lead screw nut (24), of the movable rod (25) is fixedly connected with the sliding block (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911139410.3A CN110844851A (en) | 2019-11-20 | 2019-11-20 | Power equipment overhauls and maintains device for artificial intelligence ization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911139410.3A CN110844851A (en) | 2019-11-20 | 2019-11-20 | Power equipment overhauls and maintains device for artificial intelligence ization |
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| Publication Number | Publication Date |
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| CN110844851A true CN110844851A (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911139410.3A Pending CN110844851A (en) | 2019-11-20 | 2019-11-20 | Power equipment overhauls and maintains device for artificial intelligence ization |
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| CN (1) | CN110844851A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202277A (en) * | 2021-04-26 | 2021-08-03 | 杨文钧 | Construction platform for building construction capable of automatically adjusting balance safety and stability |
| CN113775916A (en) * | 2021-09-06 | 2021-12-10 | 华能信息技术有限公司 | Power detection equipment and maintenance method thereof |
| CN114024225A (en) * | 2022-01-04 | 2022-02-08 | 国网河南省电力公司新野县供电公司 | Power equipment fixing assembly convenient to overhaul |
| CN114362031A (en) * | 2022-03-18 | 2022-04-15 | 济宁佳力电器有限公司 | Multidimensional curvature limiting device for electric wire and cable maintenance |
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| CN109004561A (en) * | 2018-08-27 | 2018-12-14 | 岳广琴 | A kind of apparatus for examination and repair of high-altitude special equipment |
| CN209536908U (en) * | 2019-01-23 | 2019-10-25 | 王媛媛 | One kind using lifting device based on architectural electricity construction |
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| US20090193925A1 (en) * | 2008-02-04 | 2009-08-06 | Pzung-Cheng Liou | Three-Axis Displacement Platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113202277A (en) * | 2021-04-26 | 2021-08-03 | 杨文钧 | Construction platform for building construction capable of automatically adjusting balance safety and stability |
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| CN114362031A (en) * | 2022-03-18 | 2022-04-15 | 济宁佳力电器有限公司 | Multidimensional curvature limiting device for electric wire and cable maintenance |
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Application publication date: 20200228 |
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