CN210957525U

CN210957525U - Portable insulator spindle centre gripping controlling device

Info

Publication number: CN210957525U
Application number: CN201921977051.4U
Authority: CN
Inventors: 邓昭辉; 张英; 赵健; 王永洪; 刘兵; 余兴建; 陈林; 周贵发; 秦曦; 卢兴福; 张晓春; 赵松; 陈东; 宋先琴
Original assignee: Guizhou Power Grid Co Ltd
Current assignee: Guizhou Power Grid Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-07-07
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a movable insulating rod clamping control device, which comprises a bearing trolley and a control bracket, wherein the control bracket is arranged on the bearing trolley, walking wheels are arranged on the bearing trolley, a clamping mechanism is arranged on the control bracket, the clamping mechanism comprises more than two pairs of clamping roller units which are arranged at intervals, each clamping roller unit comprises a U-shaped bracket, a U-shaped seat, a first elastic part, a first roller and a second roller, the first roller and the second roller are oppositely arranged, and the gap between the first roller and the second roller is suitable for accommodating an insulating rod; when the insulating rod is placed in a plurality of gaps formed by the first idler wheels and the second idler wheels, the first elastic piece drives the U-shaped seat to move towards the direction close to the second idler wheels, so that the first idler wheels and the second idler wheels are in surrounding extrusion contact with the insulating rod, and the problem that the insulating rod is inconvenient to control and carry in the prior art is solved.

Description

Portable insulator spindle centre gripping controlling device

Technical Field

The utility model relates to a portable insulator spindle centre gripping controlling device belongs to power facility equipment and detects technical field.

Background

When the power facility equipment is electrified, workers need to fix a wireless camera by means of an insulating rod at times to realize the work of insulating support crack inspection, inspection of damage of a sealing piece of an electrified part, checking of a nameplate, inspection of ablation condition of a disconnecting link contact, electrified decontamination of the insulating support, oil injection of a movable joint of an isolating switch and the like, along with the rise of voltage level, the length of the insulating rod is also lengthened, the insulating rod with 500kV voltage level reaches more than 6 meters, if some working tools with unequal weight are installed on the top of the insulating rod, the operators are difficult to support and control the insulating rod, and accordingly, the corresponding electrified work cannot be carried out durably. In addition, at present, the position needs to be continuously moved to realize the inspection of different places during the inspection, and a plurality of insulating rods and related tools need to be carried, which brings inconvenience to the inspection.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a portable insulator spindle centre gripping controlling device can realize the location and controlling to the insulator spindle through fixture, can realize the removal detection to insulator spindle and relevant instrument through the bearing trolley to it is inconvenient to solve the control insulator spindle that prior art exists, and carry the inconvenient problem of instruments such as insulator spindle.

The technical scheme of the utility model is that: the utility model provides a device is controlled to portable insulator spindle centre gripping, includes the bearing trolley and controls the support, it is in to control the support setting on the bearing trolley be provided with the walking wheel setting on the bearing trolley be equipped with fixture on controlling the support, fixture includes more than two pairs and the centre gripping gyro wheel unit that the interval set up, centre gripping gyro wheel unit includes:

the U-shaped bracket is arranged on the control bracket, and two side surfaces of the U-shaped bracket are provided with strip-shaped openings;

the U-shaped seat is arranged in the U-shaped support, two ends of the U-shaped seat are arranged in the strip-shaped opening through first support rods, the bottom of the U-shaped seat is movably sleeved on the bottom of the U-shaped support through second support rods in a penetrating manner, and the U-shaped seat can move back and forth along the strip-shaped opening;

the first elastic piece is arranged between the bottom of the U-shaped seat and the bottom of the U-shaped bracket;

the first roller is rotatably arranged in the U-shaped seat;

the first roller and the second roller are oppositely arranged, a gap between the first roller and the second roller is suitable for accommodating an insulating rod, and the first roller and the second roller are both arc-shaped columns with concave middles and convex two ends;

when the insulating rod is placed in a gap formed by the first rollers and the second rollers, the first elastic piece drives the U-shaped seat to move towards the direction close to the second rollers, so that the first rollers and the second rollers can surround and squeeze the insulating rod.

Preferably, the apparatus further comprises a driving unit, the driving unit comprising:

a first gear provided on a first roller of one of the pair of nip roller units and rotating coaxially with the first roller;

the second gear is meshed with the first gear and is fixed on the rotating shaft;

the rotating base comprises two side plates and a bottom plate, the two side plates are respectively arranged at two ends of the rotating shaft, the bottom plate is connected between the two side plates, one side plate is fixed on the control bracket, and two ends of the first gear and the first roller are rotatably arranged between the two side plates;

and the driving source is arranged on the rotating base and used for driving the second gear to rotate.

Preferably, the driving source is a manual rocking handle, and the manual rocking handle is connected with the rotating shaft.

Preferably, the manual rocking handle is provided with a ratchet wheel, the side plate is provided with a corresponding pawl, the pawl is connected to the side plate through a second elastic piece, and when the manual rocking handle rotates to drive the insulating rod upwards, the second elastic piece is suitable for driving the pawl to abut against the ratchet wheel, so that the ratchet wheel is prevented from rotating.

Preferably, the clamping roller units are three pairs and are arranged at different height positions of the control bracket, and the first gear, the second gear, the rotating base and the driving source are all arranged on the clamping roller unit at the lowest part.

Preferably, the bearing trolley comprises a bearing frame and walking wheels, the bottom of the control support is hinged to the bearing frame, a support rod is further arranged on the middle of the control support and the bearing frame, the support rod is an electric telescopic rod, and the inclination angle of the control support is changed by adjusting the length of the electric telescopic rod.

Preferably, the bearing frame comprises a front frame and a rear frame which are separated from each other, a first sleeve is arranged on the front frame and the rear frame, a loop bar is arranged in the first sleeve, the loop bar is fixedly connected to the sleeve in an adjustable manner through a fixing device, and the loop bar is fixed at different positions by changing the distance between the front frame and the rear frame so as to adjust the length of the bearing frame.

Preferably, the bottom of the front frame is provided with two walking wheels, the bottom of the rear frame is provided with a steering wheel, the steering wheel is provided with an operating rod, and the rotation and the movement of the steering wheel are controlled through the operating rod.

Preferably, the bottom of preceding frame is equipped with two support arms, is equipped with the second sleeve pipe between two support arms, two walking wheels respectively establish through a dead axle cover in the second sleeve pipe, and the dead axle passes through fixing device adjustable fixing on the second sleeve pipe.

The utility model has the advantages that: the utility model discloses well fixture includes more than two pairs and the centre gripping gyro wheel unit that the interval set up, and centre gripping gyro wheel unit comprises U type support, U type seat, first elastic component, first gyro wheel and second gyro wheel, fixes the insulator spindle centre gripping through a plurality of first gyro wheels and second gyro wheel, can realize the location to the insulator spindle. Meanwhile, the driving unit can drive the insulating rod to move up and down on the clamping mechanism, and therefore the detection requirements of different heights are met. In addition, the bearing trolley is used as a bearing part of the control support, and can move the insulating operating rod in a horizontal direction without dead angles.

The device improves the efficiency and the precision of live detection of the main equipment of the transformer substation, saves the time and the cost required by equipment maintenance, can improve the level of operation and maintenance of the transformer substation, and plays an important role in ensuring the operation reliability of the equipment. In a traditional mode, a medium-scale 220kV transformer substation is taken as an example, general investigation of a charged 220kV isolating switch support porcelain insulator manufacturer is carried out, two insulating operation rods which are about 3 meters long and provided with wireless cameras are lifted in turn, 3 working days are needed by the whole station general investigation insulating support porcelain insulator manufacturer and batches due to the fact that the rod length shakes, and workers are easy to fatigue due to the fact that the rod and the carried equipment are heavy and the insulating operation rods are lifted for a long time. By using the device, the lifting is stable, the operation and positioning of workers are light, the same work can be completed in 0.5 working day, and the high man-machine efficiency is reflected.

If the method is carried out according to economic benefits, the on-off and off-position failure of the 500kV ampere-smooth 500KV line average disconnecting switch device occurs, the power failure needs to be cut off for processing, the load loss is 9822.07 MWh/24 h/60 min × 255min =1534.7MWh, the non-contact type electrified remote control lubricating device is used for carrying out electrified lubricating processing on site, the device is used for lifting, positioning and moving, the load loss can be completely avoided under the condition of no power failure, the cost can be saved by about 76.7 ten thousand yuan only for one average line, and 76.7 ten thousand yuan is only the cost of passing through the network, so that the economic loss and the social effect caused by the device are more serious.

In conclusion, the device can improve the power supply reliability practically, ensure the stable power supply and protect the driving for the high-speed development of social economy.

Drawings

Fig. 1 is a schematic view of a movable insulating rod clamping operation device according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the U-shaped bracket of FIG. 1;

FIG. 3 is an enlarged schematic view of the drive unit of FIG. 1;

fig. 4 is a front view of the movable insulation bar holding manipulation apparatus;

fig. 5 is a top view of the movable insulation rod clamping operation device;

fig. 6 is a left side view of the movable insulation rod clamping operation device;

fig. 7 is a right side view of the movable insulation bar holding manipulation apparatus;

fig. 8 is a folding view of the movable insulation bar holding manipulation device;

in the drawings:

100 steering stent, 110 struts;

200 carrying trolley, 210 front frame, 220 rear frame, 230 road wheels, 240 first sleeve, 250 sleeve rod, 260 supporting arm, 261 second sleeve, 270 dead axle, 280 operating rod and 290 steering arm;

310 second roller, 320U-shaped bracket, 321 strip-shaped opening, 330 driving unit, 340U-shaped seat, 341 first supporting rod, 342 second supporting rod, 350 first elastic element and 360 first roller;

331 a first gear, 332 a second gear, 333 a rotating shaft, 334 a side plate, 335 a bottom plate, 336 a driving source, 337 a ratchet wheel, 338 a pawl, 339 a second elastic member.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 8, the portable insulation rod clamping device of the present embodiment includes a control bracket 100, a clamping mechanism and a carrying cart 200.

The control bracket 100 is mainly used for supporting and installing the clamping mechanism. Specifically, the control bracket 100 is mainly formed of a frame structure by a plurality of bars.

And the clamping mechanism is mainly used for clamping the operation insulating rod. The clamping mechanism comprises more than two pairs of clamping roller units which are arranged at intervals, and each clamping roller unit comprises a U-shaped bracket 320, a U-shaped seat 340, a first elastic piece 350, a first roller 360 and a second roller 310. Wherein,

and a U-shaped bracket 320 fixedly installed on the manipulation bracket 100. Specifically, one side of the U-shaped bracket 320 is fixed on the surface of the manipulation bracket 100, or the manipulation bracket 100 itself is formed as one side of the U-shaped bracket 320. Two side surfaces of the U-shaped bracket 320 are provided with elongated openings 321, and the elongated openings 321 are horizontally arranged. The bottom end of the U-shaped bracket 320 is provided with a through hole.

The U-shaped seat 340 is movably arranged in the U-shaped bracket 320. Specifically, two ends of the U-shaped seat 340 are installed in the elongated opening 321 through the first supporting rod 341, the bottom (bottom end opposite to the opening) of the U-shaped seat 340 is movably sleeved in the through hole at the bottom of the U-shaped bracket 320 through the second supporting rod 342, the U-shaped seat 340 is supported by the first supporting rod 341 and the second supporting rod 342, and the U-shaped seat 340 can move back and forth along the elongated opening 321.

And a first elastic member 350 disposed between the bottom of the U-shaped seat 340 and the bottom of the U-shaped bracket 320. Preferably, the first elastic member 350 is a compression spring sleeved on the second support rod 342. The first elastic member 350 is used for driving the U-shaped seat 340 to move toward the opening direction of the U-shaped bracket 320.

The first roller 360 is rotatably disposed in the U-shaped seat 340. Specifically, two rotating holes are formed on two sides of the U-shaped seat 340, two ends of the first roller 360 are respectively connected with a rotating shaft 333, and the two rotating shafts 333 are rotatably connected in the rotating holes. The rotation shaft 333 may be the same shaft as the first supporting rod 341 or may be a separate shaft.

And a second roller 310 rotatably disposed on the manipulation bracket 100. Specifically, the second roller 310 is rotatably sleeved on a shaft, and one end of the shaft is fixed on the control bracket 100.

The first roller 360 and the second roller 310 are oppositely arranged, and the gap between the two rollers is suitable for accommodating an insulating rod, and the first roller 360 and the second roller 310 are both arc-shaped cylinders with concave middles and convex two ends. When the insulating rod is placed in the gap formed by the first rollers 360 and the second rollers 310, the first elastic member drives the U-shaped seat 340 to move towards the direction close to the second rollers 310, so that the first rollers 360 and the second rollers 310 can surround and squeeze the insulating rod, and the insulating rod is fixed.

Preferably, the clamping mechanism further comprises a driving unit 330, and the driving unit 330 comprises a first gear 331, a second gear 332, a rotating base and a driving source 336.

The first gear 331 is disposed on the first roller 360 of one of the pair of clamping roller units, and rotates coaxially with the first roller 360, and the rotation of the first gear 331 drives the first roller 360 to move.

The second gear 332 is engaged with the first gear 331, and the second gear 332 is fixed on the rotating shaft 333, so that the second gear 332 can drive the first gear 331 to rotate.

The rotating base is mainly used for mounting the first gear 331 and the second gear 332, and includes two side plates 334 and a bottom plate 335, the two side plates 334 are respectively disposed at two ends of the rotating shaft 333 to support the rotation of the rotating shaft 333, the bottom plate 335 is connected between the two side plates 334, one of the side plates 334 is fixedly mounted on the control bracket 100, and two ends of the first gear 331 and the first roller 360 are rotatably disposed between the two side plates 334.

And a driving source 336 mounted on the rotating base for driving the second gear 332 to rotate. Preferably, the driving source 336 is a manual crank, and the manual crank is connected to the rotating shaft 333, and the rotating shaft 333 is driven to rotate by the manual crank.

In order to prevent the first roller 360 from rotating, a ratchet 337 is mounted on the manual handle, a corresponding pawl 338 is mounted on the side plate 334, the pawl 338 is connected to the side plate 334 by a second elastic member 339, one end of the second elastic member 339 is fixed to the side wall, and the other end is connected to the pawl 338. When the hand crank is rotated to drive the insulator rod upward, the second resilient member 339 is adapted to drive the pawl 338 against the ratchet 337, thereby preventing the ratchet 337 from rotating and thus preventing the first roller 360 from rotating. When the first roller 360 is required to rotate, the second resilient member 339 can be manually compressed to move the pawl 338 away from the ratchet 337, at which time the insulating rod can be moved downward by rotation of the manual crank.

In one example, three pairs of grip roller units are provided at different height positions of the manipulation bracket 100, and the first gear 331, the second gear 332, the rotating base, and the driving source 336 are provided on the lowermost grip roller unit. The structure has the advantage of taking the stability of clamping and the manufacturing cost into consideration. The lifting of the insulating rod is controlled by the clamping roller unit at the bottommost side, and the effective clamping of the insulating rod is realized by the upper two clamping roller units.

The carrying cart 200 is mainly used for movably supporting the control support 100. The load carrier 200 includes a load frame and road wheels 230, the road wheels 230 being mounted on the load frame.

Preferably, the bottom of the control bracket 100 is hinged to the bearing frame, a support rod 110 is further installed at the middle of the control bracket 100 and the bearing frame, one end of the support rod 110 is detachably hinged to the bearing frame, the other end of the support rod 110 is detachably hinged to the control bracket 100, and the inclination angle of the control bracket 100 is adjusted by changing the length of the support rod 110. Preferably, the supporting rod 110 is an electric telescopic rod, and the length of the electric telescopic rod can be adjusted to change the inclination angle of the control bracket 100. In one example, two struts 110 are provided and spaced apart from and parallel to the ends of the steering bracket 100 and the load-bearing frame.

Preferably, the bearing frame comprises a front frame 210 and a rear frame 220 which are separated from each other, a first sleeve 240 is respectively arranged on two sides of the front frame 210 and the rear frame 220, a sleeve rod 250 is installed in the first sleeve 240, the sleeve rod 250 is fixedly connected to the sleeve in an adjustable manner through a fixing device, the sleeve rod 250 is fixed at different positions by changing the distance between the front frame 210 and the rear frame 220, so as to adjust the length of the bearing frame, and thus, bearing frames with different sizes can be obtained according to actual bearing requirements. In one example, the fixing means is a pin, and a plurality of insertion holes are formed in the first bushing 240 and the loop bar 250, and the pin is inserted into the insertion holes to fix the loop bar 250 to the first bushing 240.

Preferably, two road wheels 230 are provided at the bottom of the front frame 210, a steering wheel is provided at the bottom of the rear frame 220, and a control lever 280 is provided on the steering wheel to control the rotation and movement of the steering wheel through the control lever 280. For example, the steering wheel is connected to the steering arm 290, the joystick 280 is connected to the steering arm 290, and the steering arm 290 is controlled to rotate by the joystick 280, thereby rotating the steering wheel.

Preferably, two supporting arms 260 are arranged at the bottom of the front frame 210, a second sleeve 261 is arranged between the two supporting arms 260, the two traveling wheels 230 are respectively sleeved in the second sleeve 261 through a fixed shaft 270, and the fixed shaft 270 is adjustably fixed on the second sleeve 261 through a fixing device, so that the distance between the two traveling wheels 230 can be adjusted according to bearing requirements, and the stability of the device is improved. In one example, the fixing means is a pin, and a plurality of insertion holes are formed in the second sleeve 261 and the fixed shaft 270, and the fixed shaft 270 is fixed to the second sleeve 261 by inserting the pin into the insertion holes.

During the inspection, earlier remove bearing trolley 200 to the position department of examining, and will control support 100 and prop up, fix inspection tools such as wireless camera on the insulator spindle, then alone compression second gyro wheel 310 makes the distance increase of first gyro wheel 360 and second gyro wheel 310, and with the insulator spindle joint between a plurality of first gyro wheels 360 and second gyro wheel 310, then rotate manual rocking handle, under the effect of extrusion friction power that makes progress, the insulator spindle shifts up gradually, when the insulator spindle lower extreme removes 360 departments of first gyro wheel that are close to the bottom, connect the lower part at first insulator spindle with the root insulation lever of second, and continue upwards rotate manual rocking handle, so until inspection tool arrives detection position department can. And the inclination angle of the insulating rod can be changed by adjusting the telescopic length of the supporting rod 110 so as to meet the maintenance requirements of different positions. After the inspection is finished, the second elastic piece 339 is manually compressed, the manual rocking handle is rotated, the insulating rods gradually move downwards under the action of downward extrusion friction force, and the insulating rods are detached one by one.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a portable insulator spindle centre gripping control device, includes bearing trolley (200) and controls support (100), its characterized in that, it sets up to control support (100) on bearing trolley (200) be provided with walking wheel (230) on bearing trolley (200) be equipped with fixture on controlling support (100), fixture includes more than two pairs and the centre gripping gyro wheel unit that the interval set up, centre gripping gyro wheel unit includes:

the U-shaped bracket (320) is arranged on the control bracket (100), and two side surfaces of the U-shaped bracket (320) are provided with strip-shaped openings (321);

the U-shaped seat (340) is arranged in the U-shaped support (320), two ends of the U-shaped seat (340) are arranged in the long strip-shaped opening (321) through first supporting rods (341), the bottom of the U-shaped seat (340) is movably sleeved on the bottom of the U-shaped support (320) through second supporting rods (342), and the U-shaped seat (340) can move back and forth along the long strip-shaped opening (321);

a first elastic member (350) disposed between the bottom of the U-shaped seat (340) and the bottom of the U-shaped bracket (320);

the first roller (360) is rotatably arranged in the U-shaped seat (340);

the second roller (310) is rotatably arranged on the control bracket (100), the first roller (360) and the second roller (310) are oppositely arranged, a gap between the first roller (360) and the second roller (310) is suitable for accommodating an insulating rod, and the first roller (360) and the second roller (310) are in arc-shaped columns with concave middles and convex two ends;

when an insulating rod is placed in a gap formed by the first rollers (360) and the second rollers (310), the first elastic piece drives the U-shaped seat (340) to move towards the direction close to the second rollers (310), so that the first rollers (360) and the second rollers (310) are in encircling extrusion contact with the insulating rod.

2. The movable insulation bar holding manipulation apparatus of claim 1, further comprising a driving unit (330), wherein the driving unit (330) comprises:

a first gear (331) provided on a first roller (360) of one of the pair of pinch roller units and rotating coaxially with the first roller (360);

a second gear (332) engaged with the first gear (331), and the second gear (332) is fixed to a rotation shaft (333);

the rotating base comprises two side plates (334) and a bottom plate (335), the two side plates (334) are respectively arranged at two ends of the rotating shaft (333), the bottom plate (335) is connected between the two side plates (334), one side plate (334) is fixed on the control bracket (100), and two ends of the first gear (331) and the first roller (360) are rotatably arranged between the two side plates (334);

and a driving source (336) arranged on the rotating base and used for driving the second gear (332) to rotate.

3. The movable type insulation bar holding manipulation apparatus of claim 2, wherein the driving source (336) is a manual crank, and the manual crank is connected to the rotation shaft (333).

4. A mobile insulation bar holding and handling device according to claim 3, wherein a ratchet wheel (337) is provided on the manual crank, a corresponding pawl (338) is provided on the side plate (334), the pawl (338) being connected to the side plate (334) by a second elastic member (339), the second elastic member (339) being adapted to drive the pawl (338) against the ratchet wheel (337) when the manual crank is rotated to drive the insulation bar upwards, thereby preventing the ratchet wheel (337) from rotating.

5. The movable type insulation bar gripping manipulation apparatus of any one of claims 2 to 4, wherein the gripping roller units are provided in three pairs at different height positions of the manipulation bracket (100), and the first gear (331), the second gear (332), the rotating base, and the driving source (336) are all provided on the lowermost gripping roller unit.

6. The movable insulation bar holding and manipulating device according to claim 5, wherein the carrying trolley (200) comprises a carrying frame and a traveling wheel (230), the bottom of the manipulating bracket (100) is hinged to the carrying frame, a supporting rod (110) is further disposed on the middle of the manipulating bracket (100) and the carrying frame, the supporting rod (110) is an electric telescopic rod, and the length of the electric telescopic rod is adjusted to change the inclination angle of the manipulating bracket (100).

7. The mobile insulation bar holding manipulation apparatus of claim 6, wherein the carrying frame comprises a front frame (210) and a rear frame (220) which are separated, a first sleeve (240) is provided on the front frame (210) and the rear frame (220), a loop bar (250) is installed in the first sleeve (240), the loop bar (250) is adjustably and fixedly connected to the sleeve by a fixing means, and the loop bar (250) is fixed at different positions by changing a distance between the front frame (210) and the rear frame (220) to adjust a length of the carrying frame.

8. The movable insulation bar holding and manipulating apparatus of claim 7, wherein two traveling wheels (230) are provided at a bottom of the front frame (210), a steering wheel is provided at a bottom of the rear frame (220), and a control lever (280) is provided on the steering wheel, and rotation and movement of the steering wheel are controlled by the control lever (280).

9. The movable insulation bar clamping operation device as claimed in claim 7, wherein two support arms (260) are provided at the bottom of the front frame (210), a second sleeve (261) is provided between the two support arms (260), the two travelling wheels (230) are respectively sleeved in the second sleeve (261) through a fixed shaft (270), and the fixed shaft (270) is adjustably fixed on the second sleeve (261) through a fixing device.