Wire side tool for live-line replacement of strain insulator string

Abstract

The invention relates to the technical field of power transmission line live-line maintenance, and discloses a wire side tool for live-line replacement of a strain insulator string, which comprises a support frame, a yoke plate and a lever, connecting assemblies are symmetrically mounted on the left and right sides of the front end of the support frame, the support frame and the yoke plate are fixedly connected through the connecting assemblies, and a hoisting assembly is mounted at the top of the concave surface of the support frame. The lever is installed above the supporting frame through the hoisting assembly. Fixing holes are formed in four corners of the upper end of the yoke plate, a pair of through holes are formed in the front side and the rear side of the upper end of the yoke plate, positioning grooves are formed in the front end face and the rear end face of the yoke plate in a bilateral symmetry mode, and the through holes are located between the positioning grooves in the rear side; the supporting frame is triangular, the lower portion of the front end of the supporting frame is fixedly connected with a positioning block, and the positioning block is inserted into the positioning groove. According to the invention, the triangular support frame is rigidly connected with the yoke plate to form a cantilever type'head-up 'fulcrum, a grinding rope can be directly placed on the lever to obtain a stable elevation angle, a sleeper is not needed for heightening, and friction and collision between the rope and a cross arm are thoroughly eliminated.

Description

Technical Field

[0001] This invention relates to the field of live-line maintenance technology for transmission lines, and in particular to a tool for live-line replacement of conductors in tension insulator strings. Background Technology

[0002] When replacing tension insulator strings on energized high-voltage transmission lines, the lifting and traction of the conductor side relies entirely on a temporary force-bearing system composed of an insulated grinding rope and a motorized winch. Since the conductor suspension point is lower than the crossarm, if the grinding rope is pulled out directly against the connecting plate, it will create a large angle of descent, which will not only wear down the hardware but also easily cause the insulator string to tilt. Therefore, the grinding rope must be "raised" on site so that its elevation angle is basically consistent with the axis of the insulator to ensure stable force distribution and smooth lifting.

[0003] The commonly used method is to insert a short sleeper horizontally into the groove of the first insulator cap near the conductor end, and then pass the grinding rope under the sleeper and press it into the groove, using the sleeper as a simple support to raise the rope exit point. This method uses locally available materials and is easy to assemble and disassemble, and has been used for many years in 220 kV and below lines.

[0004] However, the thickness of the sleepers is limited, and the lifting amount is usually less than 70 mm, so the head angle can only be increased by 3° to 4°. As the voltage level increases and the insulator string is lengthened, the grinding rope still needs to be pushed down at a downward angle of nearly 10° to the conductor end, resulting in too little clearance between the tail of the tensioning pulley and the lower edge of the crossarm. The grinding rope continuously rubs against the angle steel, resulting in low work efficiency and safety hazards. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a tool for live replacement of the conductor side of a tension insulator string, so as to solve the problems mentioned in the background art.

[0006] The present invention provides a live-line replacement tool for the conductor side of a tension insulator string, comprising a support frame, a connecting plate, and a lever. Connecting components are symmetrically installed on the left and right sides of the front end of the support frame. The support frame and the connecting plate are fixedly connected by the connecting components. A hoisting component is installed on the top of the concave surface of the support frame. The lever is installed above the support frame by the hoisting component.

[0007] Preferably, fixing holes are provided at the four corners of the upper end of the connecting plate, a pair of through holes are provided on the front and rear sides of the upper end of the connecting plate, and positioning grooves are symmetrically provided on the left and right sides of the front and rear end faces of the connecting plate, with the through holes located between the positioning grooves on the rear side.

[0008] Preferably, the support frame is triangular in shape, and a positioning block is fixedly connected to the lower front end of the support frame, the positioning block being inserted into the positioning groove.

[0009] Preferably, the connecting assembly includes four clamping plates, which are respectively fixedly connected to the lower front end of the left and right sides of the support frame and are arranged symmetrically with each other. The connecting plate is located between the upper and lower clamping plates. A nut is fixedly connected to the lower end of the lower clamping plate. A screw is inserted between the upper and lower clamping plates. The lower end of the screw passes through the nut and is threadedly connected to it. The screw passes through the through hole on the rear side of the connecting plate.

[0010] Preferably, the hoisting assembly includes a boom fixedly connected to the top of the support frame, a bracket rotatably connected to the lower side wall of the boom, the bracket being configured in an inverted "U" shape, and rotating shafts rotatably connected to both sides of the inner wall of the bracket. A sleeve is fixedly connected between the opposite ends of the two rotating shafts, and the lever is placed inside the sleeve. The hoisting assembly also includes a resistance element installed inside the boom, which is used to prevent the sleeve from rotating.

[0011] Preferably, the resistance component includes a threaded rod, the rod has a third threaded hole inside, the threaded rod is threaded into the third threaded hole, a knob is fixedly connected to the upper end of the threaded rod, and a pressure plate is fixedly connected to the lower end of the threaded rod, the pressure plate being located inside the support and above.

[0012] Preferably, the lever includes a first power rod and a second power rod, the first power rod is located in front of the second power rod, the rear end of the first power rod is fixedly connected to a second bolt, the front end face of the second power rod has a second threaded hole, and the second bolt is located inside the second threaded hole and threadedly connected to it.

[0013] Preferably, both the first power rod and the second power rod are made of epoxy resin and glass fiber as raw materials.

[0014] Preferably, the support frame has symmetrical storage holes on the left and right sides of its upper end, which are used to store the first power rod and the second power rod.

[0015] Preferably, the bottom of the storage hole on the left is provided with a first threaded hole, which cooperates with the second bolt. The bottom of the storage hole on the right is fixedly connected with a first bolt, which cooperates with the second threaded hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention forms a cantilevered "head-up" fulcrum by rigidly connecting a triangular support frame and a connecting plate. The grinding rope can be directly placed on the lever to obtain a stable elevation angle without the need for sleepers to raise it, thus completely eliminating the friction and collision between the rope and the crossbeam.

[0017] 2. This invention utilizes a lever connected inside the sleeve and cooperating with a resistance component, allowing for single-handed fine adjustment and instant locking of the grinding rope's pitch angle. The angle remains constant during lifting, making operation labor-saving. A single person can complete delicate tasks such as wire alignment and spring pin removal and installation.

[0018] 3. This invention designs the lever as an insulated, detachable double-section bar. After operation, it can be screwed into the storage hole to form an integral part with the support frame. It is small in size, has no loose parts, is easy to carry when climbing the tower, and greatly shortens the on-site preparation and withdrawal time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall main structure of the present invention; Figure 2 This is a schematic diagram of the right-side cross-sectional planar structure of the connecting component of the present invention; Figure 3 This is a schematic diagram of the overall front view cross-sectional planar structure of the present invention; Figure 4 This is a schematic diagram of the lever explosion structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the lever storage device of the present invention.

[0020] Numbering on the map: 1. Support frame; 11. Storage hole; 111. First threaded hole; 112. First bolt; 12. Positioning block; 2. Connecting plate; 21. Fixing hole; 22. Positioning groove; 23. Through hole; 3. Lever; 31. First power rod; 311. Second bolt; 32. Second power rod; 321. Second threaded hole; 4. Connecting assembly; 41. Clamping plate; 42. Nut; 43. Screw; 5. Lifting assembly; 51. Lifting rod; 52. Bracket; 53. Shaft; 54. Sleeve; 55. Resistance component; 551. Threaded rod; 552. Knob; 553. Pressure plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1-5 As shown, the present invention has the following three specific embodiments. Example

[0023] A live-line replacement tool for a tension insulator string conductor includes a support frame 1, a connecting plate 2, and a lever 3. Connecting components 4 are symmetrically installed on the left and right sides of the front end of the support frame 1. The support frame 1 and the connecting plate 2 are fixedly connected by the connecting components 4. A hoisting component 5 is installed on the top of the concave surface of the support frame 1. The lever 3 is installed above the support frame 1 by the hoisting component 5. Fixing holes 21 are provided at the four corners of the upper end of the connecting plate 2. A pair of through holes 23 are provided on the front and rear sides of the upper end of the connecting plate 2. Positioning grooves 22 are symmetrically provided on the left and right sides of the front and rear end faces of the connecting plate 2. The through holes 23 are located between the rear positioning grooves 22. The support frame 1 is set in a triangle, and a positioning block 12 is fixedly connected to the lower front end of the support frame 1. The positioning block 12 is inserted into the positioning groove 22. The connecting component 4 includes four clamping plates 41, which are fixedly connected to the lower front end of the left and right sides of the support frame 1 and are arranged symmetrically with each other. The connecting plate 2 is located between the upper and lower clamping plates 41. The lower end of the lower clamping plate 41 is fixedly connected to a nut 42. A screw 43 is inserted between the upper and lower clamping plates 41. The lower end of the screw 43 passes through the nut 42 and is threadedly connected to it. The screw 43 passes through the through hole 23 on the rear side of the connecting plate 2.

[0024] In this embodiment, as Figures 1-2 As shown, after the equipotential electrician enters the electric field, he first fixes the connecting plate 2 at the "stepped space" on the short side of the three connecting plates 2 at both ends of the insulator string, so that the positioning block 12 naturally inserts into the corresponding groove. The upper and lower clamping plates 41 clamp the connecting plate 2, and the screw 43 is tightened by hand to firmly fix the support frame 1. Then, the ground personnel hand over the front end of the insulating grinding rope, and the electrician places the middle section of the grinding rope on the surface of the lever 3. According to the lifting direction, the lever 3 is moved up and down, and the angle of the grinding rope changes accordingly. After the angle is appropriate, the lever 3 is restricted to stop rotating by the hoisting mechanism. The motorized winch starts to pull, and the grinding rope slides along the lever 3 to lift the conductor end hardware. Throughout the process, the grinding rope and the crossarm always maintain a safe distance. After the old string is removed and the new string is installed, the grinding rope is loosened in the opposite direction, the lever 3 is folded back, and finally the screw 43 is removed to remove the tool as a whole, completing the live replacement. Example

[0025] The difference from Embodiment 1 is that this embodiment discloses the specific structure of the hoisting assembly 5 and the lever 3; The hoisting assembly 5 includes a hoisting rod 51, which is fixedly connected to the top of the support frame 1. A bracket 52 is rotatably connected to the lower side wall of the hoisting rod 51. The bracket 52 is configured in an inverted "U" shape. Rotating shafts 53 are rotatably connected to both sides of the inner wall of the bracket 52. A sleeve 54 is fixedly connected between the opposite ends of the two rotating shafts 53. The lever 3 is placed inside the sleeve 54. The hoisting assembly 5 also includes a resistance element 55, which is installed inside the hoisting rod 51 and is used to prevent the sleeve 54 from rotating. The resistance component 55 includes a threaded rod 551. The rod 51 has a third threaded hole inside. The threaded rod 551 is threadedly connected to the third threaded hole. A knob 552 is fixedly connected to the upper end of the threaded rod 551. A pressure plate 553 is fixedly connected to the lower end of the threaded rod 551. The pressure plate 553 is located inside the bracket 52. The lever 3 includes a first power rod 31 and a second power rod 32. The first power rod 31 is located in front of the second power rod 32. A second bolt 311 is fixedly connected to the rear end of the first power rod 31. A second threaded hole 321 is opened on the front end face of the second power rod 32. The second bolt 311 is located inside the second threaded hole 321 and is threadedly connected to it. Both the first power rod 31 and the second power rod 32 are made of epoxy resin and glass fiber as raw materials.

[0026] In this embodiment, as Figure 3 , Figure 5 As shown, the equipotential electrician first holds the knob 552 and rotates the threaded rod 551 upwards, causing the pressure plate 553 to rise accordingly, allowing the bracket 52 to rotate freely. According to the size of the space on the conductor side, the first power rod 31 and the second power rod 32 are screwed together and locked to form a complete lever 3. Then, the lever 3 is inserted into the sleeve 54. The pitch of the sleeve 54 is adjusted so that the front edge of the lever 3 is aligned with the position where the grinding rope needs to be raised. Then, the knob 552 is rotated in the opposite direction, and the pressure plate 553 presses against the upper edge of the bracket 52. The entire rotating pair is immediately locked, and the angle of the lever 3 is fixed to form a cantilever-type "head-up" fulcrum. The grinding rope can be placed directly on the lever 3 to obtain a stable elevation angle without the need for sleepers to raise it, completely eliminating the friction and collision between the rope and the crossarm. Example

[0027] The difference from Embodiment 2 is that this embodiment discloses the specific structure of the storage hole 11; The support frame 1 has symmetrical storage holes 11 on the left and right sides of the upper end. The storage holes 11 are used to store the first power rod 31 and the second power rod 32. The bottom of the left storage hole 11 is provided with a first threaded hole 111, which cooperates with the second bolt 311. The bottom of the right storage hole 11 is fixedly connected with a first bolt 112, which cooperates with the second threaded hole 321.

[0028] In this embodiment, as Figures 3-5As shown, after the operation is completed, the lever 3 is disassembled into the first power rod 31 and the second power rod 32; the second bolt 311 at the front end of the first power rod 31 is aligned with the first threaded hole 111 in the left storage hole 11 and tightened, so that it lies flat and fixed in the hole; then the second threaded hole 321 at the rear end of the second power rod 32 is aligned with the first bolt 112 in the right storage hole 11 and tightened, and it is also laid flat and stored; after the two rods are completely sunk into the storage hole 11, the electrician can lift the entire support frame 1 down the tower with one hand, which is convenient to carry and avoids the falling of loose parts.

[0029] The working principle of this invention is as follows: The triangular support frame 1 is rigidly connected to the connecting plate 2 to form an extended cantilever. The lifting assembly 5 places the lever 3 at the front end of the cantilever. The lever 3 can rotate within the sleeve 54 and be locked instantly by the resistance component 55, thus providing an adjustable and reliable "head-up" fulcrum for the insulated grinding rope. The grinding rope can be placed directly on the lever 3 to obtain a stable elevation angle without the need for sleepers, completely eliminating friction and collision between the rope and the crossarm. The lever 3 is an insulated double-section bar. After operation, it can be removed and screwed into the storage hole 11 of the support frame 1. There are no loose parts, enabling rapid installation, rapid transfer, and rapid retrieval, completing the lifting and resetting of the conductor side for live replacement of tension insulator strings.

[0030] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A live-line replacement tool for the conductor side of a tension insulator string, comprising a support frame (1), a connecting plate (2), and a lever (3), characterized in that, The support frame (1) is symmetrically equipped with connecting components (4) on the left and right sides of the front end. The support frame (1) and the connecting plate (2) are fixedly connected by the connecting components (4). The top of the concave surface of the support frame (1) is equipped with a hoisting component (5). The lever (3) is installed above the support frame (1) by the hoisting component (5).

2. The live-line replacement tool for tension insulator strings according to claim 1, characterized in that, Fixing holes (21) are provided at the four corners of the upper end of the connecting plate (2). A pair of through holes (23) are provided on the front and rear sides of the upper end of the connecting plate (2). Positioning grooves (22) are symmetrically provided on the front and rear end faces of the connecting plate (2). The through holes (23) are located between the positioning grooves (22) on the rear side.

3. The live-line replacement tool for tension insulator strings according to claim 1, characterized in that, The support frame (1) is arranged in a triangle shape, and a positioning block (12) is fixedly connected to the lower front end of the support frame (1). The positioning block (12) is inserted into the positioning groove (22).

4. The live-line replacement tool for tension insulator strings according to claim 1, characterized in that, The connecting assembly (4) includes four clamping plates (41), which are fixedly connected to the lower front end of the left and right sides of the support frame (1) and are symmetrically arranged with each other. The connecting plate (2) is located between the upper and lower clamping plates (41). The lower end of the lower clamping plate (41) is fixedly connected to a nut (42), and a screw (43) is inserted between the upper and lower clamping plates (41). The lower end of the screw (43) passes through the nut (42) and is threadedly connected to it. The screw (43) passes through the through hole (23) on the rear side of the connecting plate (2).

5. The live-line replacement tool for tension insulator strings according to claim 1, characterized in that, The hoisting assembly (5) includes a hoisting rod (51), which is fixedly connected to the top of the support frame (1). A bracket (52) is rotatably connected to the lower side wall of the hoisting rod (51). The bracket (52) is configured in an inverted "U" shape. Rotating shafts (53) are rotatably connected to the left and right sides of the inner wall of the bracket (52). A sleeve (54) is fixedly connected between the opposite ends of the two rotating shafts (53). The lever (3) is placed inside the sleeve (54). The hoisting assembly (5) also includes a resistance element (55), which is installed inside the hoisting rod (51) and is used to prevent the sleeve (54) from rotating.

6. The live-line replacement tool for tension insulator strings according to claim 5, characterized in that, The resistance component (55) includes a threaded rod (551), and a third threaded hole is provided inside the rod (51). The threaded rod (551) is threadedly connected to the inside of the third threaded hole. A knob (552) is fixedly connected to the upper end of the threaded rod (551), and a pressure plate (553) is fixedly connected to the lower end of the threaded rod (551). The pressure plate (553) is located above the inside of the bracket (52).

7. The live-line replacement tool for tension insulator strings according to claim 1, characterized in that, The lever (3) includes a first power rod (31) and a second power rod (32). The first power rod (31) is located in front of the second power rod (32). The rear end of the first power rod (31) is fixedly connected to a second bolt (311). The front end face of the second power rod (32) is provided with a second threaded hole (321). The second bolt (311) is located inside the second threaded hole (321) and is threadedly connected to it.

8. The live-line replacement tool for tension insulator strings according to claim 7, characterized in that, Both the first power rod (31) and the second power rod (32) are made of epoxy resin and glass fiber as raw materials.

9. The live-line replacement tool for tension insulator strings according to claim 1, characterized in that, The support frame (1) has symmetrical storage holes (11) on the left and right sides of the upper end. The storage holes (11) are used to store the first power rod (31) and the second power rod (32).

10. A live-line replacement tool for tension insulator strings according to claim 9, characterized in that, The storage hole (11) on the left side has a first threaded hole (111) at the bottom inside. The first threaded hole (111) cooperates with the second bolt (311). The storage hole (11) on the right side has a first bolt (112) fixedly connected to the bottom inside. The first bolt (112) cooperates with the second threaded hole (321).

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