CN209896575U - Electric lifting platform for extra-high voltage insulator - Google Patents

Abstract

An electric lifting platform for an extra-high voltage insulator comprises an insulating base plate and a lifting mechanism, wherein four pillars are vertically fixed on the insulating base plate and distributed in a rectangular manner, and insulator clamps are respectively fixed at the top ends of the pillars; the lifting mechanism comprises a vertical column provided with a lifting arm component and a rotating arm component, a lifting roller and an electric device; the upright posts are vertically fixed on the insulating bottom plate; the lifting arm component and the rotating arm component are vertically fixed with the upright post; the lifting roller is arranged on the insulating bottom plate below the lifting arm assembly, and the electric device is electrically connected with the lifting roller; a rope for lifting the insulator is wound between the lifting drum and the lifting arm assembly. The platform can be mounted on an insulator string where the insulator needs to be replaced. The insulator adopts mechanical operation at whole promotion and removal in-process, and the staff only plays supervision and supplementary effect, and the effectual manpower of having liberated, the security that has improved insulator replacement efficiency and staff's operation.

Description

Electric lifting platform for extra-high voltage insulator

Technical Field

The utility model belongs to high-voltage line maintenance of equipment, but the platform of electric lifting insulator to the insulator chain use of horizontal installation.

Background

In the maintenance process of the strain insulator string horizontally installed on the high-voltage line, the insulator is replaced by a mode of hoisting a hoist or a pulley. The specific operation method is that a lifting hoist or a pulley is fixed on a tower or an insulator string in advance, and then the insulator is lifted upwards from the ground through a rope by a person staying on the ground. When the insulator is lifted to a position which is less than the high-voltage wire, the insulator is lifted and translated to the corresponding position of the high-voltage wire by workers on the high-voltage wire. Manpower is adopted in the whole lifting and transferring process.

With the popularization of ultrahigh voltage and extra-high voltage lines, the tower on the high-voltage transmission line is higher and higher. Most towers are over 50 meters high and the corresponding insulators are heavier and heavier. If the insulator is still lifted manually, for the extra-high voltage transmission line above 50, 3-4 people are generally required to be equipped with alternate pulling ropes for lifting the insulator by using the lifting hoist, and the single lifting time is 20-30 minutes or even longer. When the insulator is lifted to a high position and needs to be translated to a corresponding mounting position, if manpower is still adopted, danger is very easy to occur. Therefore, the existing insulator lifting mode cannot meet the maintenance of high-voltage and extra-high-voltage lines.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an extra-high voltage insulator electric lift platform changes manual lifting and translation insulator into mechanical operation to liberation manpower increases work efficiency, improves high altitude construction's security.

The utility model adopts the technical proposal that: the utility model provides an extra-high voltage insulator electric lift platform, includes bottom plate and elevating system, its characterized in that: the bottom plate is an insulating bottom plate, four supporting columns are vertically fixed on the insulating bottom plate and are distributed in a rectangular shape, insulator clamps are respectively fixed at the top ends of the four supporting columns, and the insulator clamps are used for being connected with insulator steel cap clamps at corresponding positions; the lifting mechanism comprises a vertical column provided with a lifting arm component and a rotating arm component, a lifting roller and an electric device; the upright post is vertically fixed on the insulating bottom plate at the center of the rectangle; the lifting arm assembly is vertically and fixedly connected with the upright post, and a roller is arranged in the lifting arm assembly; the rotating arm assembly is vertically connected with the upright post and can rotate around the upright post, and a hook is arranged in the rotating arm assembly; the position of the lifting arm assembly on the upright post is higher than that of the rotating arm assembly on the upright post; the lifting roller is arranged on the insulating bottom plate below the lifting arm assembly, and the electric device is electrically connected with the lifting roller; and a rope is wound between the lifting roller and the roller of the lifting arm assembly and is used for lifting the insulator.

Further, the insulator clamp includes fixed semicircle and activity semicircle, the middle part of fixed semicircle outer wall with the top fixed connection of pillar, hinged joint is passed through to the one end of fixed semicircle and activity semicircle, and the other end is then through bolt 3-4 locking connection, the die cavity that two semicircles of insulator clamp formed is connected with the steel cap clamp of insulator.

Further, the upper half part of the upright post is a hollow post body, 2-4 identical guide grooves are arranged on the circumference of the hollow post body at equal intervals, and the axis of each guide groove is parallel to the axis of the upright post; the rotating arm assembly comprises a rotating arm with a hook, a rotating seat, a screw rod, a nut seat, a hand wheel and a supporting sleeve; the rotating seat is fixed at one end of the rotating arm, and the rotating seat is connected to the hollow rod body of the upright post in a clamping manner; the lower end of the screw rod is screwed into the screw nut seat, the screw nut lifting seat is arranged inside the hollow column body of the upright column, the upper end of the screw rod extends out of the upper end of the hollow column body, the screw rod is connected with the upright column through an end face bearing, and the hand wheel is arranged at the upper end of the screw rod; the supporting sleeve is provided with positioning pins the number and the position of which correspond to those of the guide grooves; the support sleeve is sleeved on the hollow column body, and the positioning pin of the support sleeve penetrates through the corresponding guide groove to be fixedly connected with the nut seat.

Furthermore, the rotating arm comprises two reinforcing rods and a sliding rod, the reinforcing rods are the same in length and are arranged in parallel up and down, the sliding rod is arranged below the reinforcing rods, one ends of the sliding rod and the reinforcing rods are fixed on the rotating seat, and the other ends of the sliding rod and the reinforcing rods are fixedly connected through a connecting plate; the hook is connected to the sliding rod through a sliding bearing.

Further, the hook is a self-locking hook.

Furthermore, the rotating seat is a sleeve, an opening is arranged on the wall of the sleeve, and the direction of the opening is parallel to the axis of the sleeve; the wall of the barrel on the two sides of the opening of the sleeve is provided with a locking piece, and the locking piece can close the opening of the sleeve.

Further, the lifting arm assembly comprises a lifting arm, two pairs of rollers and a fixed seat; the lifting arm comprises two supporting plates with opposite and parallel plate surfaces; the rear ends of the two supporting plates are fixedly connected with the upper end of the upright post through the fixing seat, and the two pairs of idler wheels are coaxially arranged between the plate surfaces at the front ends of the two supporting plates.

Furthermore, the lifting roller comprises two auxiliary bearing supports and a roller, the bottoms of the two auxiliary bearing supports are fixed on the insulating bottom plate, the roller is arranged between the two auxiliary bearing supports through a roller shaft, and the roller shaft is connected with the bearing supports through bearings.

Furthermore, one of the two auxiliary bearing supports is a fixed bearing support, and the other one is a movable bearing support; the fixed bearing support is an integral body; the movable bearing support comprises a rotating support plate and a positioning seat, and the rotating support plate is connected with the positioning seat through a positioning connecting shaft; the roller shaft is connected with the rotating support plate; the positioning seat is fixed with the insulating bottom plate.

Further, the electric device comprises a controller, a storage battery, a motor and a speed reducer; the storage battery provides power for the controller and the motor; the controller is electrically connected with the motor through a lead; and a power output shaft of the motor is connected with a speed reducer, and the speed reducer is connected with a shaft of the lifting roller through a coupling.

Further, the storage battery is a lithium battery.

The utility model has the advantages that: the whole platform can be installed on an insulator string of which the insulator needs to be replaced. The insulator adopts mechanical operation at whole promotion and removal in-process, and the staff only plays supervision and supplementary effect, and the effectual manpower of liberating. Because the insulator can be replaced by only one insulator at a time, and more than one insulator which needs to be replaced on one insulator string usually exists, the insulator replacement efficiency can be greatly improved by improving the lifting and transferring speed of the single insulator. In addition, the safety of the operation of workers is improved by adopting mechanical transmission.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a right side view of fig. 1.

Fig. 3 is a schematic structural view of the middle pillar and the insulator clamp of the present invention.

Figure 4 is a schematic view of the position relationship of the center pillar to the lift arm assembly and the pivot arm assembly of the present invention.

Fig. 5 is a schematic structural view of the center pillar of the present invention.

Fig. 6 is a top view of fig. 5.

Fig. 7 is a schematic structural diagram of the rotating arm assembly of the present invention.

Fig. 8 is a top view of fig. 7.

Fig. 9 is a schematic structural view of a lift arm assembly of the present invention.

Fig. 10 is a top view of fig. 9.

Fig. 11 is a schematic structural view of the lifting roller of the present invention.

Fig. 12 is a schematic structural view of a rope winding path without an interface according to the present invention.

Fig. 13 is a schematic view of an insulator hanger configuration.

Fig. 14 is a schematic structural diagram of the insulator string mounted in an embodiment of the present invention.

Fig. 15 is a right side view of fig. 14.

In the figure: 1. the insulator comprises an insulating bottom plate, 2 parts of a support post, 3 parts of an insulator hoop, 3-1 parts of a fixed semicircle, 3-2 parts of a movable semicircle, 3-3 parts of a hinge, 3-4 parts of a bolt, 4 parts of a stand column, 4-1 parts of a guide groove, 4-2 parts of a base, 5 parts of a rotating arm, 5-1 parts of a reinforcing rod, 5-2 parts of a sliding rod, 5-3 parts of a hook, 5-4 parts of a sliding bearing, 5-5 parts of a connecting plate, 6 parts of a rotating seat, 6-1 parts of a locking part, 7 parts of a supporting sleeve, 8 parts of a positioning pin, 9 parts of a lead screw, 10 parts of a screw seat, 11 parts of a hand wheel, 12 parts of an end face bearing, 13 parts of a lifting arm, 14 parts of a fixed seat, 15 parts of a roller, 16 parts of a fixed bearing support, 17 parts of a connecting shaft, 17 parts, The device comprises a roller, 19, a roller shaft, 20, a bearing, 21, a cable without an interface, 22, a controller, 23, a storage battery, 24, a motor, 25, a coupler, 26, an insulator hanger, 26-1, an upper semicircle, 26-2, a lower semicircle, 26-3, a hinge, 26-4, a bolt, 26-5, a hanging ring, 27 and an insulator.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, an extra-high voltage insulator electric lifting platform comprises an insulating bottom plate 1, four supporting columns 2, an electric device, a lifting roller 18 and a stand column 4 provided with a lifting arm 13 assembly and a rotating arm 5 assembly. Four pillars 2 are vertically fixed on the insulating base plate 1, and the four pillars 2 form a rectangle. The bottoms of the pillars 2 are respectively fixedly connected with the insulating bottom plate 1, and the tops of the pillars 2 are respectively fixed with insulator clamps 3. It should be noted that the distance between the left and right support posts 2 corresponds to the distance between the left and right adjacent insulator strings on the high-voltage line, and the distance between the front and rear support posts 2 corresponds to the distance between the front and rear insulators on the same insulator string. The insulator hoop 3 is used for being connected with the insulator steel cap hoop at the corresponding position, and the upright post 4 is vertically arranged on the insulating bottom plate 1 at the central position of the rectangle formed by the support post 2. The lift roller 18 is disposed on the insulating base plate 1 below the lift arm 13 assembly. The electric drive should be arranged as far as possible on the insulating base plate 1 on the same side as the lifting drum 18. Thus, the insulating bottom plate 1 at the other side of the upright post 4 can be left with a certain space for workers to stand. Also for the convenience of carrying and standing by workers, the insulating base plate 1 may be configured as a rectangular plate.

As shown in fig. 3, the insulator yoke 3 includes a fixed semicircle 3-1 and a movable semicircle 3-2. The middle part of the outer wall of the fixed semicircle 3-1 is fixedly connected with the top end of the support post 2. One end of the fixed semicircle 3-1 is connected with one end of the movable semicircle 3-2 through a hinge 3-3, and the other end is locked and connected through a bolt 3-4. And a cavity formed by the two semicircles of the insulator hoop 3 is connected with a steel cap hoop of the insulator. In order to facilitate the separation of the support column 2 and the insulating base plate 1, the insulator hoop 3 is separated from the support column 2, the bottom of the support column 2 is fixedly connected with the insulating base plate 1 through a locking bolt, and the fixed semicircle 3-1 is fixedly connected with the top of the support column 2 through a bolt 3-4 in a locking manner.

As shown in fig. 2, the bottom of the upright post 4 is fixedly connected with the insulating base plate 1 through a base 4-2. As shown in fig. 4, the shaft of the upright 4 is provided with a lifting arm assembly and a rotating arm assembly. The position of the lift arm assembly on the upright 4 is higher than the position of the swivel arm assembly on the upright 4. As shown in fig. 4 to 6, the upper half part of the upright post 4 is a hollow post body, 2 to 4 identical guide grooves 4-1 are arranged on the circumference of the hollow post body at equal intervals, and the axis of each guide groove 4-1 is parallel to the axis of the upright post 4.

As shown in fig. 4, 7 and 8, the rotating arm assembly is vertically disposed on the hollow cylinder. The rotating arm assembly comprises a rotating arm 5, a rotating seat 6, a supporting sleeve 7 and a lifting screw rod. The lifting screw rod comprises a screw rod 9, a screw seat 10 and a hand wheel 11. The lower end of the screw rod 9 is screwed into the screw seat 10. The nut seat 10 is arranged inside the hollow shaft of the upright post 4. The upper end of the screw rod 9 extends out of the upper end of the hollow column body. The hand wheel 11 is arranged at the upper end of the screw rod 9. The screw rod 9 is connected with the upright post 4 through an end face bearing 12.

As shown in figure 4, 2-4 groups of positioning pins 8 are arranged on the supporting sleeve 7, and the number and the positions of the positioning pins 8 correspond to those of the guide grooves 4-1 of the upright post 4. The supporting sleeve 7 is sleeved on the hollow column body. As shown in fig. 6, the positioning pin 8 of the supporting sleeve 7 passes through the corresponding guide groove 4-1 to be fixedly connected with the nut seat 10 in the lifting screw rod.

As shown in fig. 8, the rotary base 6 is fixed to one end of the rotary arm 5. The rotary seat 6 is connected to the hollow rod body of the upright post 4 in a clamping manner. The rotating arm 5 is perpendicular to the upright 4. The rotating seat 6 is a sleeve with an opening on the wall, and the opening direction is parallel to the axis of the sleeve. A locking piece 6-1 is arranged at the opening position of the sleeve. The locking piece 6-1 can close the opening of the sleeve. When the locking piece 6-1 is loosened and the opening is opened, the inner diameter of the sleeve is larger than the outer diameter of the upright post 4, and the rotating arm 5 can rotate around the upright post 4 for adjustment; when the locking piece 6-1 is locked and the opening is closed, the inner diameter of the sleeve is the same as the outer diameter of the upright post 4, and the position of the rotating arm 5 on the upright post 4 is positioned and locked. The bottom of the swivel seat 6 should always be against the receptacle 7 during operation of the swivel arm assembly. The supporting sleeve 7 plays a supporting role for the rotating seat 6.

As shown in FIG. 7, the rotating arm 5 includes a reinforcing bar 5-1 and a sliding bar 5-2 arranged in parallel up and down. The sliding rod 5-2 is below the reinforcing rod 5-1. The lengths of the two rods are the same. One end of the sliding rod 5-2 and one end of the reinforcing rod 5-1 are fixed on the rotating seat 6, and the other ends are fixedly connected through a connecting plate 5-5. The sliding rod 5-2 is provided with a hook 5-3, and the hook 5-3 is connected with the sliding rod 5-2 through a sliding bearing 5-4. The hook 5-3 is a self-locking hook.

The adjusting step of the rotating arm component is as follows: firstly, the locking piece 6-1 on the rotating base 6 is loosened, so that the rotating base 6 can rotate on the upright post 4. Then, a hand wheel 11 is operated to rotate a lead screw 9, and the lead screw 9 drives a support sleeve 7 connected with a screw seat 10 to move up and down along a guide groove 4-1. When the supporting sleeve 7 moves to a proper height, the screw rod 9 stops rotating. The rotary arm 5 is now rotated to be located above the insulator replacement position. The bottom of the rotary seat 6 is propped against the supporting sleeve 7. And finally, locking a locking piece 6-1 on the rotating seat 6 to ensure that the rotating seat 6 is connected with the anchor ear of the upright post 4 to achieve the positioning effect.

As shown in fig. 4, the lift arm assembly is secured to the upper end of the mast 4, perpendicular to the mast 4. As shown in fig. 9 and 10, the lift arm assembly includes a lift arm 13, two pairs of rollers 15, and a fixed base 14. The lifting arm 13 comprises two support plates. The surfaces of the two supporting plates are opposite and parallel. The rear ends of the two supporting plates are fixedly connected with the upper end of the upright post 4 through the fixed seat 14, and the two pairs of rollers 15 are coaxially arranged between the plate surfaces of the front ends of the two supporting plates.

As shown in fig. 11, the lift roller 18 is fixed to the insulating base plate 1 below the lift arm 13 assembly. The lift cylinder 18 comprises a pair of fixed bearing supports 16, a pair of movable bearing supports 17 and a cylinder 18. The bottoms of the two auxiliary bearing supports are fixed on the insulating bottom plate 1. The drum 18 is disposed between the two pairs of bearing supports by means of a drum shaft 19. The drum shaft 19 is connected to the bearing support via a bearing 20. The movable bearing support 17 comprises a rotating support plate 17-1 and a positioning seat 17-2, and the rotating support plate 17-1 is connected with the positioning seat 17-2 through a positioning connecting shaft 17-3. The positioning seat 17-2 is fixed with the insulating bottom plate 1. The roller shaft 19 is connected to the rotation bracket 17-1 through a bearing 20. When the positioning connecting shaft 17-3 is pulled out, the rotating support plate 17-1 can rotate around the roller shaft 19. A bearing support is removably arranged to facilitate nesting of the knotless rope 21. Because the insulator weight is heavier, adopt no interface rope 21 to pull and be difficult to skid, the security of assurance insulator in the lift-off process that can be better.

As shown in fig. 12, the winding path of the jointless rope 21 is to open the movable bearing support 17 of the lifting drum 18 and loop-wind the jointless rope 21 on the drum 18 for at least 3 turns. After winding, the movable bearing support 17 is fixed. The two ropes of the rope 21 without the interface are then separately lapped over the two pairs of rollers 15 of the lift arm assembly. Finally the rest of the interface-less rope 21 is dropped to the ground. When the insulator is lifted, the insulator is connected with one strand of rope. The ground worker can hold and pull the other strand.

As shown in fig. 1, the electric device includes a controller 22, a battery 23, a motor 24, and a decelerator. The battery 23 supplies power to the controller 22 and the motor 24. The controller 22 is electrically connected with the motor 24 through a lead. The power output shaft of the motor 24 is connected with a speed reducer, and the speed reducer is connected with the roller shaft 19 through a coupling 25. The controller 22 may be used to control the starting, stopping, forward and reverse rotation of the motor 24, and fine adjustment of the rotational speed. The controller 22 may be provided with a receiving module, and an external remote transmitting device is electrically connected to the receiving module. The remote control transmitter also controls the start, stop and forward and reverse rotation of the motor 24. The storage battery 23 is a lithium battery.

As shown in fig. 12 and 13, the lifting of the insulator by the lifting arm assembly and the transfer to the hook 5-3 on the swivel arm assembly require the assistance of the insulator hanger 26. The insulator hanger 26 is a hoop and is divided into an upper semicircle 26-1 and a lower semicircle 26-2, one end of the upper semicircle and one end of the lower semicircle are connected through a hinge 26-3, and the other end of the upper semicircle and the lower semicircle are locked and connected through a bolt 26-4. The insulator hanger 26 forms a cavity for clamping and connecting a steel cap of the insulator. A hanging ring 26-5 is fixed in the middle of the outer wall of the upper semicircle 26-1 or the lower semicircle 26-2. As shown in fig. 12, when the insulator is lifted from the ground, the insulator hanger 26 is attached to the steel cap of the insulator by clamping. The non-interface rope 21 is selected from one strand of rope to be bound and fixed with a hanging ring 26-5 on the insulator hanging tool 26. When the insulator is lifted to a preset height and needs to be transferred to the rotating arm assembly, the rotating arm 5 is adjusted to enable the hook 5-3 to be hooked with the hanging ring 26-5 on the insulator hanger 26, and finally the cable 21 without the interface is loosened.

The utility model discloses a use as follows:

the utility model discloses in fix each subassembly on insulating bottom plate 1, all set up to the connection structure who can dismantle the separation with insulating bottom plate 1. The worker can assemble and integrally hoist the platform on the ground to the insulator string to be maintained as required, or hoist each assembly to the insulator string to be maintained in batches and then assemble the assemblies.

As shown in fig. 14 and 15, after the position of the insulator needing to be replaced is determined, the insulator clips 3 on the four pillars 2 are respectively fixed on the steel caps adjacent to the insulator 27 which does not need to be replaced. Four insulator clamps 3 provide the strong point for whole lift platform. The mounting position of the platform should be convenient for the lifting arm assembly to lift the insulator, and at the same time, the hook 5-3 in the rotating arm assembly can reach the position above the insulator replacing position. After the entire platform has been securely mounted on the insulator string, the interface-free ropes 21 are wound as required around the rollers 15 of the lifting drum 18 and lifting arm 13 assembly. The rest of the rope 21 without interface is vertical to the ground. A worker located on the high voltage line adjusts the swivel arm assembly. After the damaged insulator is removed, the insulator steel cap is connected to the insulator hanger 26 by a clamp and then is hung on the hook 5-3 of the rotating arm assembly. The assembly of the swivel arm 5 is adjusted again to connect the damaged insulator to one of the strands of the jointless rope 21 by means of the insulator hanger 26. The motor 24 is activated and the damaged insulator is lowered smoothly and quickly to the ground, driven and guided by the lifting drum 18 and the rollers 15 in the lifting arm assembly. During this period, the ground operator can stabilize the rope 21 without the interface so that the rope does not shake significantly.

When the damaged insulator is delivered to the surface, the surface operator connects the replacement insulator to the unterminated line 21 via the insulator hanger 26. The motor 24 is started to start the motor 24 to rotate the lifting insulator. And when the insulator reaches the proper height, the rotating arm assembly is adjusted, and the insulator on the cable 21 without the interface is transferred to the hook 5-3 of the rotating arm assembly. And adjusting the rotating arm 5 assembly to the position above the insulator replacing position again, and taking down the insulator from the hook 5-3 by a worker to complete replacing work.

Therefore, the insulator is mechanically operated in the whole lifting and moving process, and workers only play roles in supervision and assistance, so that manpower is effectively liberated. Because the insulator can be replaced by only one insulator at a time, and the insulator string is usually replaced by more than one insulator, the insulator replacement efficiency can be greatly improved by improving the lifting and transferring speed of the single insulator. In addition, the safety of the operation of workers is improved by adopting mechanical transmission.

Claims (10)

1. The utility model provides an extra-high voltage insulator electric lift platform, includes bottom plate and elevating system, its characterized in that: the bottom plate is an insulating bottom plate, four supporting columns are vertically fixed on the insulating bottom plate and are distributed in a rectangular shape, insulator clamps are respectively fixed at the top ends of the four supporting columns, and the insulator clamps are used for being connected with insulator steel cap clamps at corresponding positions; the lifting mechanism comprises a vertical column provided with a lifting arm component and a rotating arm component, a lifting roller and an electric device; the upright posts are vertically fixed on the insulating bottom plate at the center of the rectangle; the lifting arm assembly is vertically and fixedly connected with the upright post, and a roller is arranged in the lifting arm assembly; the rotating arm assembly is vertically connected with the upright post and can rotate around the upright post, and a hook is arranged in the rotating arm assembly; the position of the lifting arm assembly on the upright post is higher than that of the rotating arm assembly on the upright post; the lifting roller is arranged on the insulating bottom plate below the lifting arm assembly, and the electric device is electrically connected with the lifting roller; and a rope is wound between the lifting roller and the roller of the lifting arm assembly and is used for lifting the insulator.

2. An extra-high voltage insulator electric lifting platform according to claim 1, characterized in that: the insulator clamp comprises a fixed semicircle and a movable semicircle, the middle part of the outer wall of the fixed semicircle is fixedly connected with the top end of the supporting column, one ends of the fixed semicircle and the movable semicircle are connected through a hinge, the other end of the fixed semicircle and the movable semicircle are connected through a bolt 3-4 in a locking mode, and a cavity formed by the two semicircles of the insulator clamp is connected with a steel cap clamp of the insulator.

3. An extra-high voltage insulator electric lifting platform according to claim 1, characterized in that: the upper half part of the upright post is a hollow post body, 2-4 identical guide grooves are arranged on the circumference of the hollow post body at equal intervals, and the axes of the guide grooves are parallel to the axis of the upright post; the rotating arm assembly comprises a rotating arm with a hook, a rotating seat, a screw rod, a nut seat, a hand wheel and a supporting sleeve; the rotating seat is fixed at one end of the rotating arm, and the rotating seat is connected to the hollow rod body of the upright post in a clamping manner; the lower end of the screw rod is screwed into the screw nut seat, the screw nut lifting seat is arranged inside the hollow column body of the upright column, the upper end of the screw rod extends out of the upper end of the hollow column body, the screw rod is connected with the upright column through an end face bearing, and the hand wheel is arranged at the upper end of the screw rod; the supporting sleeve is provided with positioning pins the number and the position of which correspond to those of the guide grooves; the support sleeve is sleeved on the hollow column body, and the positioning pin of the support sleeve penetrates through the corresponding guide groove to be fixedly connected with the nut seat.

4. An extra-high voltage insulator electric lifting platform according to claim 3, characterized in that: the rotating arm comprises two reinforcing rods and a sliding rod, the reinforcing rods are the same in length and are arranged in parallel up and down, the sliding rod is arranged below the reinforcing rods, one ends of the sliding rod and the reinforcing rods are fixed on the rotating seat, and the other ends of the sliding rod and the reinforcing rods are fixedly connected through a connecting plate; the hook is connected to the sliding rod through a sliding bearing.

5. An extra-high voltage insulator electric lifting platform according to claim 3, characterized in that: the rotating seat is a sleeve, an opening is formed in the wall of the sleeve, and the direction of the opening is parallel to the axis of the sleeve; the wall of the barrel on the two sides of the opening of the sleeve is provided with a locking piece, and the locking piece can close the opening of the sleeve.

6. An extra-high voltage insulator electric lifting platform according to claim 1, characterized in that: the hook is a self-locking hook.

7. An extra-high voltage insulator electric lifting platform according to claim 1, characterized in that: the lifting arm assembly comprises a lifting arm, two pairs of idler wheels and a fixed seat; the lifting arm comprises two supporting plates with opposite and parallel plate surfaces; the rear ends of the two supporting plates are fixedly connected with the upper end of the upright post through the fixing seat, and the two pairs of idler wheels are coaxially arranged between the plate surfaces at the front ends of the two supporting plates.

8. An extra-high voltage insulator electric lifting platform according to claim 1, characterized in that: the lifting roller comprises two auxiliary bearing supports and a roller, the bottoms of the two auxiliary bearing supports are fixed on the insulating bottom plate, the roller is arranged between the two auxiliary bearing supports through a roller shaft, and the roller shaft is connected with the bearing supports through bearings.

9. An extra-high voltage insulator electric lifting platform according to claim 8, characterized in that: one of the two auxiliary bearing supports is a fixed bearing support, and the other auxiliary bearing support is a movable bearing support; the fixed bearing support is an integral body; the movable bearing support comprises a rotating support plate and a positioning seat, and the rotating support plate is connected with the positioning seat through a positioning connecting shaft; the roller shaft is connected with the rotating support plate; the positioning seat is fixed with the insulating bottom plate.

10. An extra-high voltage insulator electric lifting platform according to claim 1, characterized in that: the electric device comprises a controller, a storage battery, a motor and a speed reducer; the storage battery provides power for the controller and the motor; the controller is electrically connected with the motor through a lead; and a power output shaft of the motor is connected with a speed reducer, and the speed reducer is connected with a shaft of the lifting roller through a coupling.

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