Medium-phase lead electric lifting tool for power distribution hot-line work

Abstract

The invention relates to the technical field of power distribution hot-line work safety, and provides a middle-phase wire electric lifting tool for power distribution hot-line work, which comprises a mounting seat arranged below a pole top, the mounting seat is provided with two vertical plates, and a mounting gap is formed between the two vertical plates; a first swinging arm is hinged to the side, away from the mounting base, between the two vertical plates, a clamping assembly is arranged on the side, away from the vertical plates, of the first swinging arm, the clamping assembly is used for clamping a wire, and the first swinging arm is used for driving the clamping assembly to move after swinging between the two vertical plates; the telescopic rod is used for pushing the first swing arm to swing between the two vertical plates, and the driving unit is arranged on the mounting base and used for driving the telescopic rod to stretch out and draw back. The problems that in the prior art, the operation distance of operators is long, power generation is difficult, and phase-crossing operation is dangerous are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of live working safety for distribution power grids, and more specifically, to an electric lifting tool for the middle-phase conductor in live working of distribution power grids. Background Art

[0002] During the implementation of live working for distribution power grids, for some working items such as replacing the middle-phase clamp or insulator porcelain bottle live, or changing a straight pole to a strain pole live, it is necessary to temporarily unbind the middle-phase conductor from the insulator and move it elsewhere. Currently, the commonly used methods for moving the conductor include moving the conductor using the small jib of an insulated boom truck, lifting the conductor with an insulated rope, and temporarily placing the conductor on the top of the pole after the operator has done insulation shielding. All of these methods have certain potential safety hazards: First, the operator needs to control their own balance while operating with both hands at a high altitude, which is dangerous for high-altitude work. Moreover, the middle-phase conductor is at a relatively long distance, making it difficult for the operator to exert force and inconvenient to lift. Second, the movement of the insulated boom truck is restricted. Generally, the boom truck cannot move anymore after lifting the conductor with the small jib, limiting the working space of the personnel. Moreover, when the extension angle and length of the insulating boom of the boom truck are relatively large, the risk of the boom truck tipping over increases. Summary of the Invention

[0003] The present invention provides an electric lifting tool for the middle-phase conductor in live working of distribution power grids, which solves the problems in the prior art that the working distance of the operator is long, it is difficult to exert force, and cross-phase working is dangerous.

[0004] The technical solution of the present invention is as follows:

[0005] An electric lifting tool for the middle-phase conductor in live working of distribution power grids includes a mounting base for being arranged under an electric pole. The mounting base has two vertical plates, and an installation gap is formed between the two vertical plates. A first swing arm is hinged on the side away from the mounting base between the two vertical plates. A clamping assembly is arranged on the side of the first swing arm away from the vertical plates. The clamping assembly is used for clamping the conductor. After the first swing arm swings between the two vertical plates, it is used to drive the clamping assembly to move. An expansion link is hinged in the installation gap. The expansion link is used to push the first swing arm to swing between the two vertical plates. The electric lifting tool further includes a driving unit arranged on the mounting base for driving the expansion link to expand and contract.

[0006] As a further technical solution, the first swing arm and the two vertical plates form a first hinge point. Further included is a second swing arm hinged between the two vertical plates. The second swing arm and the two vertical plates form a second hinge point. The first hinge point and the second hinge point are on the same horizontal line. The first swing arm is hingedly connected to the clamping assembly. The second swing arm is hingedly connected to the clamping assembly. The first swing arm and the clamping assembly form a third hinge point. The second swing arm and the clamping assembly form a fourth hinge point. The third hinge point and the fourth hinge point are on the same horizontal line. The telescopic rod is used to push the second swing arm and the first swing arm to swing synchronously.

[0007] As a further technical solution, further included are two first hinge rods with one end hinged to the vertical plate. The other end of the first hinge rod is hingedly provided with a second hinge rod. The other end of the second hinge rod is hingedly provided on the second swing arm. The telescopic end of the telescopic rod is provided on the second hinge rod. The telescopic rod pushes the first swing arm to swing through the second swing arm. An abutting protrusion is provided on the vertical plate. After the telescopic rod pushes the second hinge rod, the second hinge rod and the first hinge rod may or may not be on the same straight line. When the first hinge rod and the second hinge rod are on the same straight line, the abutting protrusion abuts against the second hinge rod.

[0008] As a further technical solution, the clamping assembly includes a clamping seat hinged to the first swing arm and the second swing arm. The clamping seat has a clamping groove. Further included is a clamping piece with one end hinged to the clamping seat. The clamping piece has a clamping groove on the side away from the hinged end. A clamping hole corresponding to the clamping groove is provided on the clamping seat. Further included is a tightening bolt for connecting the clamping piece and the clamping seat by passing through the clamping groove and the clamping hole.

[0009] As a further technical solution, a limiting plate is provided on the vertical plate. The limiting plate has a limiting sliding groove. A limiting protrusion is provided on the first swing arm. The limiting protrusion is slidably arranged in the limiting sliding groove.

[0010] As a further technical solution, the second swing arm is triangular. The second swing arm has a first end, a second end, and a third end. The first end, the second end, and the third end are respectively hingedly provided with the vertical plate, the clamping seat, and the second hinge rod.

[0011] As a further technical solution, it further includes a support base arranged on the mounting base. The mounting base is fixedly arranged on the support base through bolts. The mounting base is arranged on the electric pole through the support base. The support base has an arc-shaped abutting surface on the side close to the electric pole. Flexible tension belts are respectively arranged on both sides of the support base, and the flexible tension belts are used to be fixed to each other after winding around the electric pole for one week.

[0012] As a further technical solution, it further includes a PLC controller, and the PLC controller is used to control the telescopic rod to expand and contract.

[0013] As a further technical solution, the length of the clamping groove is greater than the diameter of the wire.

[0014] The working principle and beneficial effects of the present invention are as follows:

[0015] In the present invention, a middle-phase wire electric lifting tool for live distribution operation has a mounting base made of high-strength insulating material, with two parallel vertical plates. An installation gap is formed between the two vertical plates for accommodating components such as a telescopic rod. The upper end of the vertical plate is connected with a first swing arm through a hinge. The length and shape of the first swing arm are designed to enable it to swing freely between the vertical plates and adapt to electric poles with different diameters. The clamping assembly is installed at the end of the first swing arm and includes a pair of openable and closable clamping claws. The clamping claws adjust the clamping force through springs and bolts and can firmly clamp the middle-phase wire. The telescopic rod is an electric push rod, installed in the installation gap, with one end hinged to the mounting base and the other end hinged to the middle part of the first swing arm. The driving unit is a small motor installed on the mounting base, connected to the driving shaft of the telescopic rod through a gear transmission mechanism, and is used to control the telescopic action of the telescopic rod. When it is necessary to lift the middle-phase wire, the motor is started, the telescopic rod extends, pushing the first swing arm to swing upward around the hinge point, thereby driving the clamping assembly to rise and realizing the lifting of the wire. This tool has a compact structure and is easy to operate, and can safely and efficiently complete the task of lifting the middle-phase wire in live distribution operation. Description of the Drawings

[0016] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0017] Figure 1 It is the first perspective axonometric structure schematic diagram of the present invention;

[0018] Figure 2 is Figure 1 the partial enlarged structure schematic diagram at A of

[0019] Figure 3 It is the second perspective axonometric structure schematic diagram of the present invention;

[0020] Figure 4 For Figure 3 The partial enlarged structural schematic diagram of part B of

[0021] In the figure: 1. Electric pole, 2. Mounting seat, 3. Vertical plate, 4. Mounting gap, 5. First swing arm, 6. Clamping assembly, 7. Conducting wire, 8. Telescopic rod, 9. Driving unit, 10. First hinge point, 11. Second swing arm, 12. Second hinge point, 13. Third hinge point, 14. Fourth hinge point, 15. First hinge rod, 16. Second hinge rod, 17. Abutting projection, 18. Clamping seat, 19. Clamping groove, 20. Clamping piece, 21. Clamping groove, 22. Clamping hole, 23. Tightening bolt, 24. Limiting plate, 25. Limiting sliding groove, 26. Limiting projection, 27. First end, 28. Second end, 29. Third end, 30. Support base, 31. Arc-shaped abutting surface, 32. Flexible tension belt. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0023] Embodiment

[0024] As Figures 1 - 4 shown, a middle-phase wire electric lifting tool for live distribution operation includes a mounting seat 2 for being arranged below the electric pole 1. The mounting seat 2 has two vertical plates 3. An installation gap 4 is formed between the two vertical plates 3. A first swing arm 5 is hinged on the side of the two vertical plates 3 away from the mounting seat 2. A clamping assembly 6 is arranged on the side of the first swing arm 5 away from the vertical plate 3. The clamping assembly 6 is used for clamping the conducting wire 7. After the first swing arm 5 swings between the two vertical plates 3, it is used to drive the clamping assembly 6 to move. A telescopic rod 8 is hinged in the installation gap 4. The telescopic rod 8 is used to push the first swing arm 5 to swing between the two vertical plates 3. It further includes a driving unit 9 arranged on the mounting seat 2 for driving the telescopic rod 8 to expand and contract.

[0025] In this embodiment, a middle-phase wire electric lifting tool for live distribution operation has a mounting base 2 made of high-strength insulating material, which has two parallel vertical plates 3. An installation gap 4 is formed between the two vertical plates 3 to accommodate components such as a telescopic rod 8. The upper ends of the vertical plates 3 are connected to a first swing arm 5 by a hinge. The length and shape of the first swing arm 5 are designed to enable it to swing freely between the vertical plates 3 and to adapt to utility poles 1 of different diameters. A clamping assembly 6 is installed at the end of the first swing arm 5, including a pair of openable and closable clamping claws. The clamping claws adjust the clamping force through springs and bolts and can firmly clamp the middle-phase wire. The telescopic rod 8 is an electric push rod installed in the installation gap 4. One end of it is hinged to the mounting base 2, and the other end is hinged to the middle part of the first swing arm 5. The driving unit 9 is a small motor installed on the mounting base 2, which is connected to the drive shaft of the telescopic rod 8 through a gear transmission mechanism to control the telescopic movement of the telescopic rod 8. When it is necessary to lift the middle-phase wire, the motor is started, the telescopic rod 8 extends, pushing the first swing arm 5 to swing upward around the hinge point, thereby driving the clamping assembly 6 to rise and realizing the lifting of the wire. This tool has a compact structure and is easy to operate, and can safely and efficiently complete the task of lifting the middle-phase wire in live distribution operation.

[0026] Furthermore, the first swing arm 5 and the two vertical plates 3 form a first hinge point 10. There is also a second swing arm 11 hinged between the two vertical plates 3. The second swing arm 11 and the two vertical plates 3 form a second hinge point 12. The first hinge point 10 and the second hinge point 12 are on the same horizontal line. The first swing arm 5 is hinged to the clamping assembly 6, and the second swing arm 11 is hinged to the clamping assembly 6. The first swing arm 5 and the clamping assembly 6 form a third hinge point 13, and the second swing arm 11 and the clamping assembly 6 form a fourth hinge point 14. The third hinge point 13 and the fourth hinge point 14 are on the same horizontal line. The telescopic rod 8 is used to push the second swing arm 11 and the first swing arm 5 to swing synchronously.

[0027] In this embodiment, the first swing arm 5 and the second swing arm 11 and the vertical plates 3 and the clamping assembly 6 form a parallelogram structure, which can ensure the horizontal lifting of the clamping assembly 6 and ensure that the wire always maintains a stable and horizontal state during the lifting process. Specifically, the first swing arm 5 and the two vertical plates 3 form a first hinge point 10. At the same time, a second swing arm 11 is also hinged between the two vertical plates 3. The second swing arm 11 and the two vertical plates 3 form a second hinge point 12. The first hinge point 10 and the second hinge point 12 are on the same horizontal line, ensuring that the two swing arms are in the same horizontal plane in the initial state and facilitating synchronous operation.

[0028] The first swing arm 5 and the clamping assembly 6 are connected by a hinged manner to form a third hinge point 13; the second swing arm 11 and the clamping assembly 6 are also connected by a hinged manner to form a fourth hinge point 14. The third hinge point 13 and the fourth hinge point 14 are also located on the same horizontal line. Through this design, a parallelogram structure is formed among the first swing arm 5, the second swing arm 11, the vertical plate 3 and the clamping assembly 6. When the telescopic rod 8 pushes the first swing arm 5 and the second swing arm 11 to swing synchronously, the clamping assembly 6 will perform horizontal lifting along the diagonal direction of the parallelogram, so as to ensure that the wire always remains in a horizontal state during the lifting process, avoiding potential safety hazards caused by the inclination of the wire.

[0029] The installation position and action mode of the telescopic rod 8 are also optimized. One end of it is hinged to the mounting seat 2, and the other end is hinged to the middle part of the second swing arm 11. When the telescopic rod 8 expands and contracts, through its connection relationship with the second swing arm 11, it can push the second swing arm 11 and the first swing arm 5 to swing synchronously. This design of synchronous swing makes the clamping assembly 6 more stable during the process of lifting the wire, avoiding the wire shaking or instability phenomenon caused by the single-arm swing, and significantly improving the reliability and safety of the tool in actual operation.

[0030] In actual operation, when it is necessary to lift the middle-phase wire, the telescopic rod 8 extends, pushing the second swing arm 11 to swing upward. Since the first swing arm 5 and the second swing arm 11 are connected by the hinged relationship of the clamping assembly 6, the first swing arm 5 will also swing synchronously. Under the combined action of the two swing arms, the clamping assembly 6 can smoothly lift the wire to the required position. This design of double swing arms and parallelogram structure not only enhances the structural stability of the tool, but also improves the flexibility and controllability of the lifting process, and is particularly suitable for live distribution operation in complex environments.

[0031] Furthermore, it also includes two first hinge rods 15 with one end hinged to the vertical plate 3. The other end of the first hinge rod 15 is hinged with a second hinge rod 16. The other end of the second hinge rod 16 is hinged to the second swing arm 11. The telescopic end of the telescopic rod 8 is arranged on the second hinge rod 16. The telescopic rod 8 drives the first swing arm 5 to swing through the second swing arm 11 and the telescopic rod 8. An abutting protrusion 17 is arranged on the vertical plate 3. After the telescopic rod 8 pushes the second hinge rod 16, the second hinge rod 16 and the first hinge rod 15 are located or not located on the same straight line. When the first hinge rod 15 and the second hinge rod 16 are located on the same straight line, the abutting protrusion 17 abuts against the second hinge rod 16.

[0032] In this embodiment, the electric lifting tool for the middle-phase conductor further optimizes its transmission and limiting structures to improve the stability and reliability of the tool and reduce the stress burden on the telescopic rod 8. Specifically, the tool further includes two first hinge rods 15, one end of each of which is hinged to the vertical plate 3, and the other end is hinged to a second hinge rod 16. The other end of the second hinge rod 16 is hinged to the second swing arm 11. The telescopic end of the telescopic rod 8 is arranged on the second hinge rod 16. By the telescopic movement of the telescopic rod 8, the second hinge rod 16 is pushed to move, thereby driving the second swing arm 11 and the first swing arm 5 to swing synchronously. When the telescopic rod 8 pushes the second hinge rod 16 to move, the positional relationship between the second hinge rod 16 and the first hinge rod 15 changes. In the working state, the second hinge rod 16 and the first hinge rod 15 are located on the same straight line. At this time, the abutting protrusion 17 abuts against the second hinge rod 16 to form a "dead point" structure. This dead point structure can effectively reduce the stress on the telescopic rod 8 during the lifting process. Because when the second hinge rod 16 and the first hinge rod 15 are located on the same straight line, the whole mechanism is in a relatively stable state. The thrust of the telescopic rod 8 mainly acts on maintaining the balance of the mechanism rather than directly bearing the weight of the conductor. This design not only improves the stability of the tool but also extends the service life of the telescopic rod 8.

[0033] In actual operation, when it is necessary to lift the middle-phase conductor, the telescopic rod 8 extends, pushing the second hinge rod 16 to move, driving the second swing arm 11 and the first swing arm 5 to swing synchronously. When the second hinge rod 16 and the first hinge rod 15 reach the same straight-line position, the abutting protrusion 17 abuts against the second hinge rod 16 to form a dead point. At this time, the clamping assembly 6 is in a stable lifting state. This design not only improves the stability of the tool during the lifting process but also effectively reduces the stress on the telescopic rod 8 through the dead point structure, making it more reliable and durable during long-term use.

[0034] Furthermore, the clamping assembly 6 includes a clamping seat 18 hinged to the first swing arm 5 and the second swing arm 11. The clamping seat 18 has a clamping groove 19. It also includes a clamping piece 20 with one end hinged to the clamping seat 18. On the side of the clamping piece 20 away from the hinged end, there is a clamping groove 21. On the clamping seat 18, there are clamping holes 22 arranged corresponding to the clamping groove 21. It further includes a tightening bolt 23 for connecting the clamping piece 20 and the clamping seat 18 by passing through the clamping groove 21 and the clamping holes 22.

[0035] In this embodiment, the clamping assembly 6 of the electric lifting tool for the middle-phase conductor adopts a unique adjustable clamping structure to ensure the firm clamping and flexible adjustment of the middle-phase conductor. Specifically, the clamping assembly 6 includes a clamping seat 18, which is connected to the first swing arm 5 and the second swing arm 11 in a hinged manner to form a stable clamping support structure. The clamping seat 18 is provided with a clamping groove 19 for accommodating the middle-phase conductor.

[0036] The clamping assembly 6 also includes a clamping piece 20, one end of which is hingedly arranged on the clamping seat 18, and the other end (the side away from the hinged end) is provided with a clamping groove 21. A clamping hole 22 is provided at a corresponding position on the clamping seat 18, and a tightening bolt 23 passes through the clamping groove 21 and the clamping hole 22 to tightly connect the clamping piece 20 to the clamping seat 18. This design allows the clamping piece 20 to rotate around the hinge point, thereby adjusting the clamping angle and force between the clamping piece 20 and the clamping seat 18 to adapt to wires of different diameters and shapes.

[0037] Furthermore, a limiting plate 24 is provided on the vertical plate 3 , a limiting sliding groove 25 is provided on the limiting plate 24 , and a limiting protrusion 26 is provided on the first swing arm 5 , and the limiting protrusion 26 is slidably disposed in the limiting sliding groove 25 .

[0038] In this embodiment, the electric lifting tool for the middle-phase conductor further optimizes its limiting structure to improve the stability and reliability of the tool during operation. Specifically, a limiting plate 24 is provided on the vertical plate 3, and a limiting slot 25 is provided on the limiting plate 24. A limiting protrusion 26 matching the limiting slot 25 is provided on the first swing arm 5, and the limiting protrusion 26 is slidably disposed in the limiting slot 25.

[0039] This design allows the movement trajectory of the first swing arm 5 to be constrained by the limiting slide groove 25 during the swinging process, thereby ensuring a more stable and accurate movement of the first swing arm 5. The cooperation between the limiting slide groove 25 and the limiting protrusion 26 can not only prevent the first swing arm 5 from excessively deflecting or shaking during the swinging process, but also limit the maximum swing angle of the swing arm to a certain extent, thereby avoiding structural damage or operational errors caused by excessive swinging amplitude.

[0040] Furthermore, the second swing arm 11 is triangular in shape and has a first end 27, a second end 28 and a third end 29, which are hinged to the vertical plate 3, the clamping seat 18 and the second hinged rod 16 respectively.

[0041] In this embodiment, the second swing arm 11 of the electric lifting tool for the middle-phase conductor adopts a triangular structure to enhance its structural stability and load-bearing capacity. Specifically, the second swing arm 11 has three endpoints, which are defined as a first end 27, a second end 28, and a third end 29. The first end 27 is hinged to the vertical plate 3, the second end 28 is hinged to the clamping seat 18, and the third end 29 is hinged to the second hinged rod 16. The design of this triangular structure enables the second swing arm 11 to better disperse stress when subjected to force, thereby improving its overall strength and stability.

[0042] Further, it further includes a support base 30 arranged on the mounting base 2. The mounting base 2 is fixedly arranged on the support base 30 through bolts. The mounting base 2 is arranged on the electric pole 1 through the support base 30. The support base 30 has an arc-shaped abutting surface 31 on the side close to the electric pole 1. Flexible tension belts 32 are respectively arranged on both sides of the support base 30, and the flexible tension belts 32 are used to be fixed to each other after winding around the electric pole 1 for one week.

[0043] In this embodiment, the electric lifting tool for the middle-phase conductor further optimizes its installation structure to improve the fixing stability and adaptability of the tool on the electric pole 1. Specifically, the tool further includes a support base 30, and the mounting base 2 is fixedly arranged on the support base 30 through bolts. The support base 30 is used to mount the whole tool on the electric pole 1, and it has an arc-shaped abutting surface 31 on the side close to the electric pole 1. The arc-shaped abutting surface 31 fits with the outer surface of the electric pole 1 to ensure close contact between the support base 30 and the electric pole 1.

[0044] Further, it further includes a PLC controller, and the PLC controller is used to control the telescopic rod 8 to extend and retract.

[0045] In this embodiment, the electric lifting tool for the middle-phase conductor further optimizes its control mode and introduces a PLC controller to achieve precise control of the telescopic movement of the telescopic rod 8. Specifically, the tool further includes a PLC controller, and the PLC controller is electrically connected to the driving unit 9 of the telescopic rod 8 and is used to control the telescopic movement of the telescopic rod 8.

[0046] Through the preset program logic, the PLC controller can accurately control the telescopic speed, telescopic distance, and the start and stop timing of the telescopic movement of the telescopic rod 8 according to the actual operation requirements. This automatic control mode not only improves the operation convenience of the tool but also can effectively reduce the human operation error and ensure the stability and safety of the tool during the process of lifting the conductor.

[0047] Further, the length of the clamping groove 19 is greater than the diameter of the conductor 7.

[0048] In this embodiment, since the position of the conductor 7 on the electric pole 1 is not fixed, in order to increase the adaptability of the device in this scheme, the length of the clamping groove 19 is relatively long, so that no matter how far the relative position between the conductor 7 and the electric pole 1 is, it can achieve clamping and lifting.

[0049] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electric lifting tool for the middle-phase conductor in live distribution operation, characterized in that, It includes a mounting base (2) for being arranged below the top of a utility pole (1). The mounting base (2) has two vertical plates (3). An installation gap (4) is formed between the two vertical plates (3). A first swing arm (5) is hingedly arranged on the side away from the mounting base (2) between the two vertical plates (3). A clamping assembly (6) is arranged on the side of the first swing arm (5) away from the vertical plate (3). The clamping assembly (6) is used for clamping a wire (7). After the first swing arm (5) swings between the two vertical plates (3), it is used to drive the clamping assembly (6) to move. A telescopic rod (8) is hingedly arranged in the installation gap (4). The telescopic rod (8) is used to push the first swing arm (5) to swing between the two vertical plates (3). It also includes a driving unit (9) arranged on the mounting base (2) for driving the telescopic rod (8) to expand and contract.

2. The electric lifting tool for the middle-phase conductor in live distribution operation according to claim 1, characterized in that, A first hinge point (10) is formed between the first swing arm (5) and the two vertical plates (3). It also includes a second swing arm (11) hingedly arranged between the two vertical plates (3). A second hinge point (12) is formed between the second swing arm (11) and the two vertical plates (3). The first hinge point (10) and the second hinge point (12) are located on the same horizontal line. The first swing arm (5) and the clamping assembly (6) are hingedly connected. The second swing arm (11) and the clamping assembly (6) are hingedly connected. A third hinge point (13) is formed between the first swing arm (5) and the clamping assembly (6). A fourth hinge point (14) is formed between the second swing arm (11) and the clamping assembly (6). The third hinge point (13) and the fourth hinge point (14) are located on the same horizontal line. The telescopic rod (8) is used to push the second swing arm (11) and the first swing arm (5) to swing synchronously.

3. The electric lifting tool for the middle-phase conductor in live distribution operation according to claim 2, characterized in that, It also includes two first hinge rods (15) with one end hingedly arranged on the vertical plate (3). The other end of the first hinge rod (15) is hingedly arranged with a second hinge rod (16). The other end of the second hinge rod (16) is hingedly arranged on the second swing arm (11). The telescopic end of the telescopic rod (8) is arranged on the second hinge rod (16). The telescopic rod (8) pushes the first swing arm (5) to swing through the second swing arm (11) and the telescopic rod (8). An abutting protrusion (17) is arranged on the vertical plate (3). After the telescopic rod (8) pushes the second hinge rod (16), the second hinge rod (16) and the first hinge rod (15) are located or not located on the same straight line. When the first hinge rod (15) and the second hinge rod (16) are located on the same straight line, the abutting protrusion (17) abuts against the second hinge rod (16).

4. The electric lifting tool for the middle-phase conductor used in live working on power distribution networks according to claim 3, characterized in that, The clamping assembly (6) includes a clamping seat (18) hinged to the first swing arm (5) and the second swing arm (11). The clamping seat (18) has a clamping groove (19), and further includes a clamping piece (20) hinged at one end to the clamping seat (18). The clamping piece (20) has a clamping groove (21) on the side away from the hinged end. The clamping seat (18) is provided with a clamping hole (22) arranged corresponding to the clamping groove (21), and further includes a tightening bolt (23) for connecting the clamping piece (20) and the clamping seat (18) by passing through the clamping groove (21) and the clamping hole (22).

5. The electric lifting tool for the middle-phase conductor in live working of power distribution according to claim 4, characterized in that, The vertical plate (3) is provided with a limiting plate (24), the limiting plate (24) is provided with a limiting sliding groove (25), the first swing arm (5) is provided with a limiting protrusion (26), and the limiting protrusion (26) is slidably arranged in the limiting sliding groove (25).

6. The electric lifting tool for the middle-phase conductor used in live distribution operation according to claim 5, wherein, The second swing arm (11) is triangular, and the second swing arm (11) has a first end (27), a second end (28) and a third end (29). The first end (27), the second end (28) and the third end (29) are respectively hinged to the vertical plate (3), the clamping seat (18) and the second hinge rod (16).

7. The electric lifting tool for the middle-phase conductor used in live distribution operation according to claim 1, characterized in that, It further includes a support base (30) arranged on the mounting seat (2). The mounting seat (2) is fixedly arranged on the support base (30) by bolts. The mounting seat (2) is arranged on the electric pole (1) through the support base (30). The support base (30) has an arc-shaped abutting surface (31) on the side close to the electric pole (1). Flexible tension belts (32) are respectively arranged on both sides of the support base (30), and the flexible tension belts (32) are used to be fixed to each other after winding around the electric pole (1) for one week.

8. The electric lifting tool for the middle-phase conductor in live working of power distribution according to claim 1, wherein It further includes a PLC controller, and the PLC controller is used to control the telescopic movement of the telescopic rod (8).

9. The electric lifting tool for the middle-phase conductor used in live working of power distribution according to claim 4, characterized in that, The length of the clamping groove (19) is greater than the diameter of the wire (7).

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