A lifting device for electric power construction

Abstract

The present invention discloses a lifting device for electric power construction, which relates to the technical field of electric power construction; it includes a base; a lifting structure is installed on the base, the lifting structure is connected to a lifting platform, a rotating platform is installed on the lifting platform, the rotating platform includes a support plate, and a U-shaped guardrail is installed on the support plate; an expansion structure is installed at one end of the support plate where the opening of the guardrail is located, the expansion structure includes an extension plate vertically installed at the opening of the guardrail, and an extension frame is slidably installed outside the guardrail; a track groove is provided on the inner surface of the guardrail, one end of the extension plate close to the support plate is connected to the extension frame through a positioning rod, and a limiting column inserted into the two side track grooves is installed at the end of the extension plate far from the support plate. This device can expand the area in any direction according to actual needs, while ensuring the stability of the overall structure and avoiding safety problems such as shaking and tipping over.

Description

Technical Field

[0001] The invention relates to the technical field of electric power construction, in particular to a lifting device for electric power construction. Background Art

[0002] Power construction refers to a series of work on the construction, installation, maintenance and overhaul of power equipment and facilities. It includes multiple links such as planning, design, construction, supervision and acceptance of power projects, and is an important part of ensuring power supply and safe operation. Power construction needs to follow a series of specifications and standards, such as the National Power Engineering Specifications, Building Electrical Installation Project Acceptance Specifications, etc. These specifications and standards have made clear requirements and regulations for each link of power construction to ensure construction quality and safety.

[0003] In addition to ground construction, power construction also involves a large amount of high-altitude installation and maintenance work, and there are many heavy equipment that need to be installed at high altitudes, so a lifting device is needed to lift the construction personnel and the required equipment to the installation location, making it easier for operators to complete the installation. Common movable lifting equipment mainly includes scissor lifts and column lifts. Scissor lifts are small in size when folded, and can provide a high height when lifted, and are flexible and convenient to move, so they are widely used in power construction.

[0004] Most of the aerial work in power construction is concentrated in the area around power towers or poles. There may be some protruding equipment in the air in such areas. Therefore, the available area of ​​the lifting device will be subject to certain restrictions and cannot reach the location where it needs to be installed, causing the operator and the equipment to move at high altitudes or even out of the area where the lifting platform is located. Some lifts will set up an extended area on the lifting platform to increase the range of activities to improve this problem. However, in actual operation, after the lifting equipment raises the lifting platform, it is necessary to ensure that the center of gravity is always within the range of the bottom support and avoid violent shaking. Once the center of gravity shifts, there will be great safety hazards and even serious accidents. Summary of the invention

[0005] The purpose of the present invention is to provide a lifting device for power construction to solve the problems raised in the above background technology. A lifting device that can be flexibly adjusted and expanded at high altitudes and has high stability is provided to meet the use requirements of power construction and improve safety.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A lifting device for electric power construction, comprising a base; a lifting structure is installed on the base, the lifting structure is connected to a lifting platform, a rotating platform is installed on the lifting platform, the rotating platform includes a support plate, and a U-shaped guardrail is installed on the support plate; an expansion structure is installed at one end of the support plate where the guardrail opens, the expansion structure includes an extension plate vertically installed at the opening of the guardrail, and an extension frame is slidably installed outside the guardrail; a track groove is arranged on the inner surface of the guardrail, one end of the extension plate close to the support plate is connected to the extension frame through a positioning rod, and a limiting column inserted into the two side track grooves is installed at the end of the extension plate far from the support plate;

[0008] The expansion structure is used to expand the activity space on the support plate, and the rotating platform is used to control the rotation of the support plate to change the expansion direction of the expansion structure;

[0009] A reinforcement structure is installed on one side of the base, the reinforcement structure includes a positioning frame fixedly installed on the base, vertical telescopic rods are respectively rotatably installed at two diagonal corners of the positioning frame, and clamps are installed on the telescopic rods.

[0010] As a further scheme of the present invention: the track groove includes an arc groove, the arc groove takes the axis of the positioning rod as the center of the circle, a plurality of vertical chutes pointing to the support plate are connected to the arc groove, an armrest groove is opened on the extension plate, and an elastic hook is connected to the extension frame through a torsion spring, and the elastic hook hooks on the armrest groove.

[0011] As a further scheme of the present invention: grooves are respectively opened on both sides of the support plate, both sides of the extension frame are inserted into the grooves and are slidably connected to the support plate, locking blocks slidably sleeved on the guardrail are arranged at both ends of the extension frame, locking screws are threadedly connected to the locking blocks, a plurality of concave holes corresponding to the positions of the locking screws are opened on the guardrail, and a first-stage motor connecting the positioning rod is installed on one side of the extension frame.

[0012] As a further scheme of the present invention: the telescopic rod includes an outer cylinder and an extension rod, the extension rod is inserted into the outer cylinder, a plurality of positioning holes are opened on the outer cylinder, a plurality of through holes coinciding with the positioning holes are opened on the extension rod, and a plurality of positioning screws passing through the positioning holes and the through holes are installed on the extension rod.

[0013] As a further scheme of the present invention: the clamp includes a fixed clamping seat and a movable clamping seat, the fixed clamping seat is rotatably connected to the extension rod, adjusting screws are installed on both sides of the fixed clamping seat, and the adjusting screws are connected to the movable clamping seat.

[0014] As a further solution of the present invention: inclined reinforcement rods are installed on both sides of the positioning frame, the reinforcement rods are connected to the base, a plurality of baffles are installed on a side of the positioning frame close to the lifting structure, a plurality of hooks are installed on a side of the positioning frame away from the lifting structure, and baffle rods are placed on the hooks.

[0015] As a further solution of the present invention: the lifting structure includes two groups of connecting rods that are continuously cross-connected in an X shape, and multiple cross bars are connected between the connecting rods. The lifting structure includes a hydraulic rod, and both ends of the hydraulic rod are respectively connected to cross bars located between different connecting rods.

[0016] As a further solution of the present invention: the rotating platform includes a disc fixedly mounted on the lifting platform, the support plate is sleeved on the outside of the disc and is rotatably connected to the lifting platform with the axis of the disc as the center, a turntable is rotatably mounted on the disc, a ladder is installed on the side of the lifting platform away from the expansion structure, and a movable plate is installed on the end of the guardrail close to the ladder.

[0017] As a further solution of the present invention: a gear ring surrounding a disc is installed on one side of the support plate close to the lifting platform, a secondary motor is installed on the lifting platform, the secondary motor is connected to a driving gear located on the inner side of the gear ring, the driving gear and the gear ring are meshed with each other, and a plurality of ball bearings are installed on the lifting platform, and the ball bearings contact the support plate.

[0018] As a further solution of the present invention: a plurality of wheels are installed on the base, and a control handle is installed at one end of the base.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The above-mentioned lifting device for electric power construction is adopted. The device is provided with a rotatable support plate on the top of the lifting platform, and an expansion structure that can be expanded laterally is provided on one side of the support plate. In actual use, it can cross obstacles in the air and expand in different directions at high altitude, which is convenient for construction personnel to carry out installation and maintenance work, and significantly improves the convenience of use;

[0021] The above-mentioned lifting device for power construction is adopted. This device is provided with two clamps connected by telescopic rods. The clamps can be fixedly clamped on fixed columns erected on the ground such as electric poles, electric towers, street light poles or large trees. By fixing them at two positions, one high and one low, they can be effectively reinforced. When the center of gravity on the lifting platform moves in all directions, the overall stability can be maintained, avoiding shaking or even tipping over in the high altitude part, thereby ensuring the life safety of personnel to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a schematic diagram of the structure of the lifting device used in power construction.

[0023] Figure 2 This is a schematic diagram of the front structure of the lifting device used in power construction.

[0024] Figure 3 This is a schematic diagram of the structure of the lifting device for power construction in the unfolded state.

[0025] Figure 4 This is a schematic diagram of the structure of the rotating platform and the extended structure in the lifting device for power construction.

[0026] Figure 5 This is a schematic diagram of the reinforcement structure in the lifting device used for power construction.

[0027] Figure 6 This is a schematic diagram of the structure of the reinforcement structure in the lifting device used for power construction.

[0028] Figure 7 This is a schematic diagram of the structure of the clamp in the lifting device used in power construction.

[0029] In the figure: 1-base; 11-wheel; 12-control handle; 13-reinforcement rod; 2-lifting structure; 21-connecting rod; 22-hydraulic rod; 23-cross bar; 3-lifting platform; 31-ladder; 32-ball; 4-rotating platform; 41-support plate; 411-groove; 412-gear ring; 42-guardrail; 421-movable plate; 422-track groove; 4221-slide groove; 4222-arc groove; 423-concave hole; 43-disc; 431-turntable; 44-secondary motor; 45-driving gear; 5-expansion structure; 51-extension frame ;511-locking block;512-locking screw;52-extension plate;521-handrail slot;522-positioning rod;523-limiting column;53-elastic hook;531-torsion spring;54-primary motor;6-reinforcement structure;61-positioning frame;611-hook;612-blocking rod;613-blocking plate;62-telescopic rod;621-outer cylinder;6211-positioning screw;6212-through hole;622-extension rod;6221-positioning hole;63-clamp;631-fixed clamping seat;632-movable clamping seat;633-adjusting screw. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 7 In an embodiment of the present invention, a lifting device for electric power construction includes a base 1; a lifting structure 2 is installed on the base 1, the lifting structure 2 is connected to a lifting platform 3, a rotating platform 4 is installed on the lifting platform 3, the rotating platform 4 includes a support plate 41, and a U-shaped guardrail 42 is installed on the support plate 41; an extension structure 5 is installed at one end of the support plate 41 where the guardrail 42 is open, the extension structure 5 includes an extension plate 52 vertically installed at the opening of the guardrail 42, and an extension frame 51 is slidably installed outside the guardrail 42; a track groove 422 is provided on the inner surface of the guardrail 42, one end of the extension plate 52 close to the support plate 41 is connected to the extension frame 51 through a positioning rod 522, and a limit post 523 inserted into the two side track grooves 422 is installed at the end of the extension plate 52 away from the support plate 41;

[0032] The extension structure 5 is used to expand the activity space on the support plate 41, and the rotating platform 4 is used to control the rotation of the support plate 41 to change the extension direction of the extension structure 5;

[0033] A reinforcement structure 6 is installed on one side of the base 1, the reinforcement structure 6 includes a positioning frame 61 fixedly installed on the base 1, vertical telescopic rods 62 are respectively rotatably installed at two diagonal corners of the positioning frame 61, and a clamp 63 is installed on the telescopic rod 62.

[0034] A lifting structure 2 is provided on the base 1 of this device to control the height of the lifting platform 3. A rotating platform 4 is installed on the lifting platform 3. The support plate 41 of the rotating platform 4 serves as a working platform for workers. The guardrail 42 is used for protection on three sides of the support plate 41, with only one side open, and an extension plate 52 that can be expanded horizontally is provided at the open position. The extension plate 52 itself is in a vertical state and does not occupy too much space. If it is necessary to change the current position during high-altitude operation, the rotating platform 4 is used to rotate the support plate 41 so that the extension plate 52 faces the direction where movement is required, and the extension plate 52 is opened, then the extension plate 52 can be laid flat on the edge of the support plate 41 to expand the internal space. Moreover, after the extension plate 52 is unfolded, the extension frame 51 will also move out synchronously and cooperate with the guardrail 42 to maintain the protection of the internal space and avoid the risk of falling.

[0035] The bottom of the extension plate 52 is connected to the extension frame 51, and the top is located in the track groove 422. The track groove 422 is provided with a plurality of vertical slide grooves 4221. If the extension frame 51 is directly pushed outward, the extension plate 52 moves outward while the inner side naturally falls and finally becomes horizontal. If the external space is limited, the end of the extension plate 52 located at a high position can be rotated downward first and stuck in the slide groove 4221 located further inside. Since the slide groove 4221 is vertical, it limits the position of the inner side of the extension plate 52. Therefore, after the extension plate 52 is flattened, a part of it will overlap with the support plate 41, shortening the extension distance to meet the use requirements.

[0036] The device can rotate and extend in multiple directions as required, and the process of rotational drive will generate huge torque, and the extension process will also cause the risk of shaking or even center of gravity shift, so the reinforcement structure 6 is used to strengthen and fix the device. The device is mainly used for high-altitude operations in areas near power towers or poles. If there is no fixed bracket-like structure around, the device can also use a conventional lifting device to operate without extension. In this space without support, there are generally not too many obstacles at high altitudes, so the device can be directly placed below the construction location without expanding the operating range by extension.

[0037] In areas near electric towers or poles, there may be obstacles in the air that limit the range of movement of the lifting structure 2, so it is necessary to expand after reaching the high altitude. The reinforcement structure 6 uses two telescopic rods 62 to install clamps 63 respectively. The clamps 63 are fixed on a fixed pillar, one high and one low. The pillar, telescopic rod 62 and positioning frame 61 form an irregular trapezoid located in the vertical plane, forming a stable support for the positioning frame 61. No matter what direction of torque or shaking tendency the device generates, the structure can be kept stable under the action of the reinforcement structure 6 to avoid tipping over due to shaking, thereby greatly improving safety.

[0038] As another embodiment of the present invention, please refer to Figures 2 to 4The track groove 422 includes an arc groove 4222, the arc groove 4222 takes the axis of the positioning rod 522 as the center, and is connected to a plurality of slide grooves 4221 pointing vertically to the support plate 41. The extension plate 52 is provided with a handrail groove 521, and the extension frame 51 is connected with an elastic hook 53 through a torsion spring 531, and the elastic hook 53 is hooked on the handrail groove 521. Since the upper part of the track groove 422 is an arc groove 4222, under the premise that the positioning rod 522 at the bottom of the extension plate 52 does not move, the upper limit column 523 can move in the arc groove 4222 and drive the extension plate 52 to rotate. The handrail groove 521 on the extension plate 52 is convenient for manual operation by the staff, and the elastic hook 53 hooks the extension plate 52 to keep the extension plate 52 vertical. When expansion is required, the elastic hook 53 is pressed down, and the handrail slot 521 can be operated to rotate the extension plate 52. After rotating to the corresponding vertical slot position, the free end of the extension plate 52 is pressed downward, and the extension plate 52 and the extension frame 51 can be gradually pushed outward to flatten the extension plate 52.

[0039] See also Figures 2 to 4 The support plate 41 has grooves 411 on both sides, and the extension frame 51 is inserted into the grooves 411 on both sides and slidably connected with the support plate 41. Both ends of the extension frame 51 are provided with locking blocks 511 that are slidably sleeved on the guardrail 42. The locking blocks 511 are threadedly connected with locking screws 512. The guardrail 42 has a plurality of concave holes 423 corresponding to the positions of the locking screws 512. A primary motor 54 connected to the positioning rod 522 is installed on one side of the extension frame 51. The grooves 411 cooperate with the extension frame 51 to limit the range of movement of the extension frame 51 and prevent the extension frame 51 from falling off. The locking blocks 511 are equipped with locking screws 512. When the extension plate 52 is unfolded or retracted, the locking screws 512 correspond to different positions of the concave holes 423. Inserting the locking screws 512 into the corresponding concave holes 423 can prevent the extension frame 51 from sliding. The first-stage motor 54 is an optional structure with improved effects. If the first-stage motor 54 is not used, the armrest slot 521 can be raised manually, and the extension plate 52 and the extension frame 51 can be pulled inward to fold up the extension structure 5. If the first-stage motor 54 is selected, the first-stage motor 54 can be used to drive the positioning rod 522 to rotate the extension plate 52 upward, and the extension plate 52 and the extension frame 51 can be automatically retracted and folded under the restriction of the track slot 422.

[0040] See also Figure 2 , Figure 5 , Figure 6 and Figure 7The telescopic rod 62 includes an outer tube 621 and an extension rod 622. The extension rod 622 is inserted into the outer tube 621. The outer tube 621 is provided with a plurality of positioning holes 6221. The extension rod 622 is provided with a plurality of through holes 6212 that overlap with the positioning holes 6221. The extension rod 622 is provided with a plurality of positioning screws 6211 that penetrate the positioning holes 6221 and the through holes 6212. The extension rod 622 can move in the outer tube 621 and is fixed by using positioning screws 6211 in combination with different positioning holes 6221 and through holes 6212, so that the telescopic rod 62 is maintained at different lengths. The drawings and the textual description of the specific structure of the telescopic rod 62 are not restrictive, but are a display of the structure of the telescopic rod 62 that meets the requirements of the present device. The use of other types of telescopic rods 62, such as telescopic rods 62 with axial fixing locks or threaded connections, also meets the requirements of the present device.

[0041] See also Figure 2 , Figure 5 , Figure 6 and Figure 7 The clamp 63 includes a fixed clamping seat 631 and a dynamic clamping seat 632. The fixed clamping seat 631 is rotatably connected to the extension rod 622. Adjustment screws 633 are installed on both sides of the fixed clamping seat 631, and the adjustment screws 633 are connected to the dynamic clamping seat 632. The dynamic clamping seat 632 can be removed, and the fixed clamping seat 631 is moved to a position that fits the pillar of the electric pole or electric tower. The dynamic clamping seat 632 is buckled from the other side and locked with the adjustment screw 633 to effectively fix it. The clamp 63 is not a restrictive structure and is not limited by the drawings and the description of this paragraph. In addition to using the dynamic clamping seat 632 and the fixed clamping seat 631 to cooperate, the clamp 63 that can be clamped synchronously to the middle and controlled by parallel rods, or the steel ring that can be controlled to shrink by screws as the clamp 63, also meets the use requirements of the device.

[0042] See also Figure 2 , Figure 5 and Figure 6 , inclined reinforcement rods 13 are installed on both sides of the positioning frame 61, and the reinforcement rods 13 are connected to the base 1. A plurality of baffles 613 are installed on the side of the positioning frame 61 close to the lifting structure 2, and a plurality of hooks 611 are installed on the side of the positioning frame 61 away from the lifting structure 2, and a baffle rod 612 is placed on the hook 611. The reinforcement rod 13 strengthens the connection between the positioning frame 61 and the base 1, and can also enhance the stability of the base 1 after the positioning frame 61 is fully fixed. The hook 611 is used to hang the baffle rod 612. The baffles 613 and the baffle rod 612 are respectively located on the two sides of the positioning frame 61, and cooperate with each other to limit the position of the telescopic rod 62 and the clamp 63, so that when the reinforcement structure 6 is in the retracted state, all parts can be located inside the positioning frame 61, reducing the required space and not affecting the movement and storage of the device.

[0043] See also Figures 1 to 3 The lifting structure 2 includes two groups of connecting rods 21 that are continuously cross-connected in an X shape, and a plurality of cross bars 23 are connected between the connecting rods 21. The lifting structure 2 includes a hydraulic rod 22, and the two ends of the hydraulic rod 22 are respectively connected to the cross bars 23 located between different connecting rods 21. The multiple connecting rods 21 of the lifting structure 2 form a continuous X-shaped structure. The hydraulic rod 22 controls the spacing of the cross bars 23 at different positions, which can change the angle between the connecting rods 21, thereby changing the overall height of the lifting structure 2. In addition to using a scissor-type lifting structure 2, the present device can also use a multi-pillar telescopic adjustment type lifting structure 2.

[0044] See also Figure 1 , Figure 3 and Figure 4 The rotating platform 4 includes a disk 43 fixedly mounted on the lifting platform 3, the support plate 41 is sleeved on the outside of the disk 43, and is rotatably connected to the lifting platform 3 with the axis of the disk 43 as the center of the circle. A turntable 431 is rotatably mounted on the disk 43, and a ladder 31 is mounted on the side of the lifting platform 3 away from the expansion structure 5, and a movable plate 421 is mounted on the end of the guardrail 42 close to the ladder 31. The ladder 31 is used for operators to go up and down, and the movable plate 421 can be opened to facilitate the entry and exit of the staff and the transportation of equipment. A fixed disk 43 is set in the middle of the support plate 41. When rotating the support plate 41, the staff can stand on the disk 43 or put items on the disk 43, which reduces the load-bearing capacity of the support plate 41 and also reduces the torque requirement for driving the support plate 41 to rotate. If the equipment is too large, only a part of it can be placed on the disk 43, and the turntable 431 located on the surface of the disk 43 can also rotate with the equipment, which does not affect the placement of large equipment.

[0045] See also Figure 1 , Figure 3 and Figure 4 A gear ring 412 surrounding a disc 43 is installed on one side of the support plate 41 close to the lifting platform 3. A secondary motor 44 is installed on the lifting platform 3. The secondary motor 44 is connected to a driving gear 45 located inside the gear ring 412. The driving gear 45 and the gear ring 412 are meshed with each other. A plurality of balls 32 are installed on the lifting platform 3. The balls 32 contact the support plate 41. The secondary motor 44 drives the driving gear 45, drives the gear ring 412 to rotate, and controls the rotation of the support plate 41. The balls 32 are used to enhance the support of the support plate 41.

[0046] See also Figures 1 to 3, a plurality of wheels 11 are mounted on the base 1, and a control handle 12 is mounted on one end of the base 1. The wheels 11 enable the device to move as needed, and the control handle 12 is used to drag the device to move. In addition to these basic structures, the base 1 should also be provided with a power supply or engine required for power supply, a control system and a signal processor, and other matching structures required for controlling the hydraulic rod 22, etc. Since this part is a common sense accessory and there are certain differences depending on the specific form of the lifting structure 2, no restrictive description is given.

[0047] The working principle of the present invention is:

[0048] The device is provided with a lifting structure 2 on the base 1, the lifting structure 2 is connected to the lifting base 1, a rotatable support plate 41 is installed on the lifting base 1, guardrails 42 are installed on three sides of the support plate 41, an extension plate 52 is provided on the open side, an extension frame 51 is provided on the outside of the extension plate 52 to wrap the guardrails 42 from both sides, the bottom of the extension plate 52 is connected to the extension frame 51, and the top limit column 523 is inserted into the track groove 422 on the guardrails 42 on both sides. By moving the extension plate 52 down along the track groove 422, the end of the extension plate 52 at the bottom can be pushed out, and the extension frame 51 is pushed out at the same time, so as to expand the use space. A vertical positioning frame 61 is installed at one end of the base 1, and the top and bottom of the positioning frame 61 are respectively connected to a clamp 63 through a telescopic rod 62. The clamp 63 can be fixed on the pillar of a telephone pole, a street light pole or a telephone tower to form a vertical quadrilateral structure with a fixed position, thereby enhancing the fixing effect of the device as a whole. Therefore, the device can be expanded to various angles at high altitude without affecting the overall stability, which is very suitable for the high-altitude operation requirements of power construction.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A lifting device for electric power construction, comprising a base; characterized in that: A lifting structure is installed on the base. The lifting structure is connected to a lifting platform. A rotating platform is installed on the lifting platform. The rotating platform includes a support plate, and a U-shaped guardrail is installed on the support plate. An extension structure is installed at one end of the support plate where the guardrail opens. The extension structure includes an extension plate vertically installed at the opening of the guardrail, and an extension frame is slidably installed outside the guardrail. A track groove is provided on the inner surface of the guardrail. One end of the extension plate close to the support plate is connected to the extension frame through a positioning rod, and a limit post inserted into the two track grooves is installed at the end of the extension plate far from the support plate. The track groove includes an arc groove, the arc groove is centered on the axis of the positioning rod, and a plurality of vertical chutes pointing to the support plate are connected to the arc groove. An armrest groove is opened on the extension plate, and a resilient hook is connected to the extension frame through a torsion spring, and the resilient hook hooks on the armrest groove. The extension structure is used to expand the activity space on the support plate, and the rotating platform is used to control the rotation of the support plate to change the direction of expansion of the extension structure. A reinforcement structure is installed on one side of the base. The reinforcement structure includes a positioning frame fixedly installed on the base. Vertical telescopic rods are respectively rotatably installed at two diagonal corners of the positioning frame, and clamps are installed on the telescopic rods. The telescopic rod includes an outer cylinder and an extension rod. The extension rod is inserted into the outer cylinder. A plurality of positioning holes are opened on the outer cylinder, and a plurality of through holes coinciding with the positioning holes are opened on the extension rod. A plurality of positioning screws passing through the positioning holes and the through holes are installed on the extension rod. The clamp includes a fixed clamping seat and a movable clamping seat. The fixed clamping seat is rotatably connected to the extension rod. Adjusting screws are installed on both sides of the fixed clamping seat, and the adjusting screws are connected to the movable clamping seat. Inclined reinforcement rods are installed on both sides of the positioning frame, and the reinforcement rods are connected to the base. A plurality of baffles are installed on the side of the positioning frame close to the lifting structure, and a plurality of hooks are installed on the side of the positioning frame far from the lifting structure, and a blocking rod is placed on the hooks.

2. The lifting device for electric power construction according to claim 1, characterized in that: Grooves are respectively opened on both sides of the support plate. Both sides of the extension frame are inserted into the grooves and are slidably connected to the support plate. Locking blocks slidably sleeved on the guardrail are provided at both ends of the extension frame. Locking screws are threadedly connected to the locking blocks. A plurality of concave holes corresponding to the positions of the locking screws are opened on the guardrail. A first-stage motor connecting the positioning rod is installed on one side of the extension frame.

3. The lifting device for electric power construction according to claim 1, characterized in that: The lifting structure includes two sets of continuously cross-connected linkages in an X shape, and a plurality of cross bars are connected between the linkages. The lifting structure includes a hydraulic rod, and both ends of the hydraulic rod are respectively connected to cross bars located between different linkages.

4. The lifting device for electric power construction according to claim 1, characterized in that: The rotating platform includes a disc fixedly installed on the lifting platform. The support plate is sleeved outside the disc and is rotatably connected to the lifting platform with the axis of the disc as the center. A turntable is rotatably installed on the disc. A ladder is installed on the side of the lifting platform far from the extension structure, and a movable plate is installed at one end of the guardrail close to the ladder.

5. The lifting device for electric power construction according to claim 4, characterized in that: A gear ring surrounding a disc is installed on one side of the support plate close to the lifting platform, a secondary motor is installed on the lifting platform, the secondary motor is connected to a driving gear located on the inner side of the gear ring, the driving gear and the gear ring are meshed with each other, a plurality of balls are installed on the lifting platform, and the balls contact the support plate.

6. The lifting device for electric power construction according to claim 1, characterized in that: A plurality of wheels are installed on the base, and a control handle is installed at one end of the base.

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