A special device for replacing power transmission line fittings and a method for using the same

Abstract

The application discloses a special equipment for replacing a power transmission line hardware and a use method thereof, and relates to the technical field of overhead power transmission line operation and maintenance, wherein the special equipment comprises a hanging point connecting plate fixture, a connecting plate assembly, at least one group of lifting assemblies and a clamping plate; the hanging point connecting plate fixture is provided with a downward opening clamping hole, which is used for clamping and positioning with the hanging point connecting plate on the side of a hardware tower to be replaced; the connecting plate assembly is circumferentially fixed to the outer periphery of the hanging point connecting plate fixture and is provided with a plurality of connecting plate hanging points; the two ends of the lifting assembly are respectively detachably connected with the connecting plate hanging points and the clamping plate; and the clamping plate is provided with a groove which is adapted to a hardware connecting stress point bolt. The application also discloses a standardized whole-process use method of the equipment. The application does not need to damage the original structure of a pole tower, can realize quick installation and fixing, is suitable for operation requirements of different numbers of wire branches, is synchronous and tight, has uniform stress, has excellent safety protection performance, and greatly improves the safety and operation efficiency of the hardware replacement operation of the power transmission line.

Description

Technical Field

[0001] This invention relates to the field of overhead transmission line operation and maintenance technology, specifically to a special device for replacing transmission line fittings and its usage method. Background Technology

[0002] Overhead transmission lines are a core component of power transmission systems. Line fittings, as key components used to connect, fix, and protect conductors and towers, are exposed to the outdoor environment for extended periods, continuously enduring conductor tension, wind and rain erosion, temperature variations, lightning strikes, and mechanical vibrations. This makes them prone to defects such as corrosion, deformation, cracks, and fatigue damage. To ensure the safe and stable operation of transmission lines, damaged fittings must be replaced regularly.

[0003] Currently, the common method for replacing transmission line fittings is to temporarily weld or bolt temporary brackets onto the tower, attach the upper end of lifting equipment such as lever hoists and tensioners to the temporary brackets, and the lower end to the conductor fittings. Tightening the lifting equipment transfers the conductor tension to the temporary brackets, unloading the fittings before replacement. However, this method has several drawbacks: Temporary hanging points need to be set up on the tower body. During the operation, drilling, welding and other operations are required on the tower. This not only damages the integrity and stress system of the original steel structure of the tower and increases the structural safety hazards of the tower, but also the installation and dismantling of temporary hanging points takes a long time, which greatly increases the working time at height and the labor intensity of the workers. Temporary brackets have fixed mounting points and a limited number of mounting points, making them unsuitable for hardware replacement operations of conductors with different numbers of splits, such as 2-split, 4-split, 6-split, and 8-split. They have extremely poor versatility, and different brackets need to be customized for different specifications of lines, resulting in high operating costs and poor adaptability. When operating multiple split conductors, multiple sets of lifting equipment cannot achieve synchronous tightening, which can easily lead to uneven stress on each sub-conductor and asynchronous displacement, resulting in conductor twisting, bending, slippage, or even major safety accidents such as conductor breakage and tower stress imbalance, posing a high risk to operational safety. The existing clamps and hanging point connecting plates mostly adopt a simple hook structure without an effective anti-slip and anti-detachment limiting structure. During operation, the clamps are prone to slippage and detachment. In addition, the hooks of the lifting equipment do not have an anti-detachment locking structure, which can easily cause them to come off when the conductor tension fluctuates, posing a great safety hazard and failing to meet the safety specifications for live work. The existing operation method has an incomplete stress circuit, and the stress is concentrated at a single point on the temporary bracket, which is prone to bracket deformation and breakage. In addition, the operation steps are cumbersome, requiring multiple people to cooperate, resulting in low operation efficiency and prolonged power outages, which seriously affects the reliability of power supply.

[0004] In response to the shortcomings of the existing technologies, some specialized hardware replacement clamps have emerged in the industry. However, existing clamps generally suffer from narrow compatibility, poor synchronization, insufficient load-bearing capacity, and weak safety protection performance. They cannot simultaneously meet the universality requirements and operational safety requirements for replacing hardware of different specifications of lines. Therefore, there is an urgent need to develop a brand-new specialized equipment for replacing power transmission line hardware to solve many of the pain points in the existing technologies. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a specialized device for replacing transmission line fittings and its usage method. This specialized device allows for rapid fixing without damaging the original tower structure, utilizing existing anchor points and connecting plates for direct replacement. It is highly adaptable, meeting the operational needs of conductors with varying numbers of splits. It enables simultaneous tightening of multiple lifting components, ensuring uniform and stable stress distribution, excellent safety performance, and convenient and efficient operation. Furthermore, the present invention provides a method for using this specialized device, standardizing the operational process and further improving the safety and efficiency of the operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A special device for replacing transmission line fittings includes a mounting plate clamp, a mounting plate assembly, at least one set of lifting assemblies, and at least one set of clamps; The hanging point connecting plate clamp is provided with a downward-facing latch, which is used to engage and position with the hanging point connecting plate on the tower side of the hardware to be replaced. The hanging point connecting plate clamp is circumferentially surrounded and fixedly installed with a connecting plate assembly. The connecting plate assembly has several connecting plate hanging points, and a lifting assembly is detachably hung on the connecting plate hanging points. The other end of the lifting assembly is detachably connected to a clamping plate, and the clamping plate has an upward-facing groove adapted to the connecting force point bolt of the hardware to be replaced.

[0007] Furthermore, the connecting plate assembly includes two large outer connecting plates symmetrically fixed on both sides of the connecting plate clamp, and two small outer connecting plates respectively fixed at both ends of the large outer connecting plates; the large outer connecting plates and the small outer connecting plates are connected end to end to form a closed frame structure that surrounds the outer perimeter of the connecting plate clamp.

[0008] Furthermore, at least two connecting plates are provided on the outer side of the large connecting plate of the outer hanging point, protruding outward in a direction perpendicular to the plate surface, and the connecting plate hanging points are formed on the connecting plates; a number of connecting plate hanging points are evenly arranged in an array along the length direction of the small connecting plate of the outer hanging point.

[0009] Furthermore, the lifting component is any one of a double-hook tensioner, a hydraulic tensioner, or a ratchet tensioner.

[0010] Furthermore, the lifting component is a double-hook tensioner, with hooks at both ends engaging with the connecting plate hanging point and the clamping plate, respectively.

[0011] Furthermore, the clamp plate has multiple grooves, which are spaced apart along the length of the clamp plate and are symmetrically arranged with respect to the center of the clamp plate; the end of the clamp plate is provided with a mounting hole for engaging with the lifting assembly.

[0012] Furthermore, the inner wall of the latch of the hanging point connecting plate clamp is provided with anti-slip engagement teeth, which abut against and limit the surface of the connecting plate at the hardware end.

[0013] Furthermore, both ends of the double-hook tensioner are equipped with anti-detachment locking devices, which are spring-loaded snap-locking structures.

[0014] A method for using a special device for replacing transmission line fittings, employing the special device for replacing transmission line fittings as described in any one of claims 1-8, includes the following steps: S1: Pre-operation preparation: Confirm the model of the hardware to be replaced, the specifications of the tower side hanging point connecting plate, the specifications of the bolts at the hardware connection stress point, and the number of conductor splits. Select the corresponding number of clamps and lifting components and check the integrity of the equipment parts. S2: Hanging point end clamping and fixing: The pre-assembled hanging point connecting plate clamp (1) and connecting plate assembly (2) are hoisted into the air and clamped from top to bottom onto the hanging point connecting plate on the side of the hardware to be replaced through the downward-opening clamp, thus completing the locking installation of the equipment fixing end. S3: Lifting component connection: Based on the number of wire splits and the working space, select the corresponding connecting plate hanging point on the connecting plate component, and attach the upper hook of the lifting component to the selected connecting plate hanging point, and attach the lower hook to the hanging hole at the end of the clamp plate. S4: Synchronous tensioning and unloading: Simultaneously tighten all lifting components, causing the conductor-side hardware to move synchronously towards the tower-side hanging point, so that the axial tension of the hardware to be replaced is gradually transferred to the special equipment until the hardware to be replaced is completely unloaded and the connecting bolts can be disassembled without obstruction. S5: Fitting replacement operation: Remove the old fittings to be replaced, align and install the new fittings, and tighten all connecting bolts to the torque specified by the power industry, and confirm that the fittings are installed in place; S6: Equipment dismantling and storage: Reverse the operation to slowly loosen the lifting component, so that the newly installed hardware can fully bear the tension of the wire. Then, remove the lifting component, clamp, and hanging point connecting plate clamp in sequence to complete the hardware replacement operation.

[0015] Furthermore, in step S5, a double-hook tensioner is used as a lifting component. After the double-hook tensioner is fully stressed, it is tightened for another 5-8 turns to complete the tensioning and unloading operation.

[0016] This specialized equipment for replacing transmission line fittings uses the existing mounting plates on the transmission line towers as the sole fixed load-bearing base. Through the structural adaptation and mechanical coordination of each component, a complete and closed axial force transmission circuit is constructed to achieve a smooth and controllable transfer of conductor tension, ultimately completing the stress-free unloading and disassembly / reassembly of the fittings to be replaced. The specific component coordination and mechanical transmission logic is as follows: First, through the downward-facing opening of the hanging point connecting plate clamp, it forms an embedded locking with the tower-side hanging point connecting plate from top to bottom. Relying on the anti-slip engagement teeth on the inner side of the clamp, it forms radial and axial double limiting, anchoring the fixed end of the entire equipment to the original structure of the tower without damage, providing a stable bearing base for the entire force circuit; The closed connecting plate assembly, which is circumferentially enclosed and fixed to the outer periphery of the hanging point connecting plate clamp, on the one hand, evenly distributes the concentrated bearing stress of the hanging point connecting plate clamp to the entire frame structure, avoiding single-point overload; on the other hand, through multiple positions and multiple standardized connecting plate hanging points, it provides symmetrical and balanced hanging points for multiple sets of lifting components, adapting to the synchronous force requirements of conductors with different split numbers; The two ends of the lifting component form detachable rigid hanging connections with the connecting plate hanging points and the clamping plate, respectively. The clamping plate opens upwards... The groove is designed to form an embedded limiting clamp with the bolt at the connection point of the conductor-side hardware, thus constructing a complete closed axial force circuit of "tower-side hanging point connecting plate - hanging point connecting plate clamp - connecting plate assembly - lifting assembly - clamp plate - conductor-side hardware connecting bolt - conductor". During operation, by simultaneously tightening all lifting components, the axial distance between the fixed end of the tower side and the force-bearing end of the conductor side is shortened, and the axial tension of the conductor originally borne by the hardware to be replaced is gradually and evenly transferred to the force circuit of the special equipment until the hardware to be replaced is completely unloaded and no longer subject to axial tension, realizing stress-free safe disassembly and assembly of the hardware. At the same time, the anti-detachment locking part of the hook of the double hook tensioner and the anti-slip engagement teeth of the clamp form a double anti-detachment and anti-slip redundancy, without changing the original force system of the transmission line throughout the process, thus avoiding the operational risks of conductor slippage, hardware rebound, and structural overload from the root.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This invention uses the existing hanging point connecting plate of the pole tower as the only fixed bearing base. Through the downward-facing snap-fit ​​of the hanging point connecting plate clamp, it can achieve rapid snap-fit ​​installation from top to bottom. The entire process does not require drilling, welding or other operations on the pole tower, and does not damage the integrity of the original steel structure and stress system of the pole tower. It significantly shortens the installation time of the fixed end and reduces the labor intensity of high-altitude workers.

[0018] This invention utilizes a closed-frame structure with multiple sets of connecting plate attachment points at different positions on both the large and small outer connecting plates. The attachment positions can be flexibly selected based on the number of conductor splits and the available workspace, adapting to the replacement of conductor fittings for different specifications such as 2-split, 4-split, 6-split, and 8-split conductors. Furthermore, the lifting assembly can be equipped with various types of tensioners, including double-hook tensioners, hydraulic tensioners, and ratchet tensioners, to accommodate different loads and tensioning strokes, significantly improving the equipment's versatility and reducing operating costs.

[0019] The connecting plate assembly of this invention adopts a circumferentially enclosed frame structure, which can evenly distribute the concentrated load-bearing stress of the connecting plate clamps at the hanging points to the entire frame structure, avoiding single-point overload. At the same time, multiple sets of connecting plate hanging points can realize the symmetrical and balanced layout of multiple sets of lifting components. During operation, all lifting components can be tightened simultaneously, driving each sub-conductor to move synchronously. This completely solves the problems of uneven stress and easy twisting and slippage of multi-split conductors in the prior art, ensuring the stability of the conductor and tower during operation.

[0020] The accompanying usage method of this invention standardizes the entire process from work preparation to equipment dismantling, clarifies key operational requirements such as synchronous wire tightening and torque locking, enables standardized operations, and significantly reduces the risk of human error; at the same time, the equipment is easy to operate, which can greatly shorten the operation time, thereby shortening the power outage time of the line and effectively improving the power supply reliability of the transmission line. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a special equipment for replacing power transmission line fittings according to the present invention; In the diagram: 1. Hanging point connecting plate clamp; 11. Bayonet; 2. Connecting plate assembly; 21. Outer hanging point large connecting plate; 211. Connecting plate; 22. Outer hanging point small connecting plate; 23. Connecting plate hanging point; 3. Lifting assembly; 4. Clamping plate; 5. Groove. Detailed Implementation

[0022] The technical solutions of the present invention will now be described in detail with reference to the accompanying drawings.

[0023] like Figure 1 As shown, a special device for replacing transmission line fittings includes a hanging point connecting plate clamp 1, a connecting plate assembly 2, at least one set of lifting assemblies 3, and at least one set of clamps 4. The hanging point connecting plate clamp 1 is provided with a downward-facing latch 11. The latch 11 is used to engage and position with the hanging point connecting plate on the side of the hardware to be replaced. The hanging point connecting plate clamp 1 is circumferentially surrounded and fixedly installed with a connecting plate assembly 2. The connecting plate assembly 2 is provided with several connecting plate hanging points 23. A lifting assembly 3 is detachably attached to the connecting plate hanging points 23. A clamping plate 4 is detachably connected to the other end of the lifting assembly 3. The clamping plate 4 is provided with an upward-facing groove 5 that matches the connecting force point bolt of the hardware to be replaced.

[0024] Furthermore, the connecting plate assembly 2 includes two large outer connecting plates 21 symmetrically fixed on both sides of the connecting plate clamp 1, and two small outer connecting plates 22 respectively fixed at both ends of the large outer connecting plates 21; the large outer connecting plates 21 and the small outer connecting plates 22 are connected end to end to form a closed frame structure that surrounds the outer periphery of the connecting plate clamp 1.

[0025] Furthermore, at least two connecting plates 211 are provided on the outer side of the outer side plate of the large connecting plate 21, which protrudes outward in a direction perpendicular to the plate surface, and the connecting plate hanging points 23 are provided on the connecting plates 211; a number of connecting plate hanging points 23 are evenly arranged in an array along the length direction of the small connecting plate 22.

[0026] Furthermore, the lifting component 3 is any one of a double-hook tensioner, a hydraulic tensioner, or a ratchet tensioner.

[0027] Furthermore, the lifting component 3 is a double-hook tensioner, with hooks at both ends respectively engaging with the connecting plate hanging point 23 and the clamping plate 4.

[0028] Furthermore, the clamping plate 4 has multiple grooves 5, which are arranged at intervals along the length of the clamping plate 4 and are symmetrically arranged with respect to the center of the clamping plate 4; the end of the clamping plate 4 is provided with a hooking hole for engaging with the lifting component 3.

[0029] Furthermore, the inner wall of the latch 11 of the hanging point connecting plate clamp 1 is provided with anti-slip engagement teeth, which abut against and limit the surface of the connecting plate at the hardware end.

[0030] Furthermore, both ends of the double-hook tensioner are equipped with anti-detachment locking devices, which are spring-loaded snap-locking structures.

[0031] A method for using a special device for replacing transmission line fittings, employing the special device for replacing transmission line fittings as described in any one of claims 1-8, includes the following steps: S1: Preparation before operation: Confirm the model of the hardware to be replaced, the specifications of the tower side hanging point connecting plate, the specifications of the bolts at the hardware connection stress point and the number of conductor splits, select the corresponding number of matching clamps 4 and lifting components 3, and check the integrity of the equipment components. S2: Hanging point end clamping and fixing: The pre-assembled hanging point connecting plate clamp (1) and connecting plate assembly (2) are lifted into the air and clamped from top to bottom onto the hanging point connecting plate on the side of the hardware tower to be replaced through the downward-opening clamp 11, thus completing the locking installation of the equipment fixing end. S3: Lifting component connection: Based on the number of wire splits and the working space, select the corresponding connecting plate hanging point 23 on the connecting plate component 2, and hang the upper hook of the lifting component 3 on the selected connecting plate hanging point 23, and hang the lower hook on the hanging hole at the end of the clamping plate 4. S4: Synchronous tensioning and unloading: Synchronously tighten all lifting components 3, causing the conductor-side hardware to move synchronously towards the tower-side hanging point, so that the axial tension of the hardware to be replaced is gradually transferred to the special equipment until the hardware to be replaced is completely unloaded and the connecting bolts can be disassembled without obstruction. S5: Fitting replacement operation: Remove the old fittings to be replaced, align and install the new fittings, and tighten all connecting bolts to the torque specified by the power industry, and confirm that the fittings are installed in place; S6: Equipment dismantling and storage: Reverse operation to slowly release the lifting component 3, so that the newly installed hardware can fully bear the tension of the wire. Then, dismantle the lifting component 3, clamp 4, and hanging point connecting plate clamp 1 in sequence to complete the hardware replacement operation.

[0032] Furthermore, in step S5, a double-hook tensioner is used as the lifting component 3. After the double-hook tensioner is fully stressed, it is tightened for another 5-8 turns to complete the tensioning and unloading operation.

[0033] This specific embodiment discloses a special equipment for replacing transmission line fittings, which is mainly used for the de-energized or live-line replacement of tension string and suspension string fittings of AC and DC transmission lines. It is particularly suitable for replacing fittings that are fixed on the tower side by hanging point connecting plates and the conductor side by multiple sets of bolts as stress connection points. It can achieve stress-free and stable unloading of the fittings to be replaced without damaging the original tower structure or erecting additional load-bearing supports, which greatly improves the safety and convenience of operation.

[0034] The core load-bearing and force-transmitting structure of this specialized equipment includes a hanging point connecting plate clamp 1, a connecting plate assembly 2, at least one set of lifting assemblies 3, and at least one set of clamping plates 4. These components work together to form a complete force transmission circuit. Their specific structure and connection relationships are as follows: The hanging point connecting plate clamp 1 serves as the fixed load-bearing base of the entire equipment. It is integrally forged from high-strength alloy steel plate, with a block-shaped structure. A downward-facing latch 11 is opened at the bottom. The latch 11 is a U-shaped groove adapted to the thickness of the hanging point connecting plate on the tower side of the hardware to be replaced. The inner wall of the groove is machined with anti-slip teeth with a slanted, reverse-tooth structure. When the latch 11 is engaged with the hanging point connecting plate from top to bottom, the anti-slip teeth tightly abut against the surface of the hanging point connecting plate, forming a double limit in both axial and radial directions. This prevents the clamp from slipping or falling off during operation, ensuring the load-bearing stability of the fixed end.

[0035] The connecting plate assembly 2 is circumferentially enclosing and fixedly installed around the outer periphery of the hanging point connecting plate clamp 1. In this embodiment, the connecting plate assembly 2 includes two symmetrically arranged outer hanging point large connecting plates 21 and two symmetrically arranged outer hanging point small connecting plates 22. The two outer hanging point large connecting plates 21 are respectively fixed to the left and right sides of the hanging point connecting plate clamp 1 by high-strength bolts, and the two outer hanging point small connecting plates 22 are respectively fixed to the front and rear ends of the two outer hanging point large connecting plates 21 by high-strength bolts. The outer hanging point large connecting plates 21 and the outer hanging point small connecting plates 22 are connected end to end to form a rectangular closed frame structure. This frame structure surrounds the outer periphery of the hanging point connecting plate clamp 1, which can evenly distribute the concentrated load-bearing stress of the hanging point connecting plate clamp 1 to the entire connecting plate frame, avoid single-point overload, and at the same time greatly expand the hanging point layout space to adapt to the operational needs of conductors with different numbers of splits. Furthermore, on the outer side of each large connecting plate 21 of the outer hanging point, two connecting plates 211 are welded outward along a direction perpendicular to the plate surface. Each connecting plate 211 has a circular connecting plate hanging point 23. On each small connecting plate 22 of the outer hanging point, five connecting plate hanging points 23 are evenly arranged along its length. All connecting plate hanging points 23 are standardized hanging holes with diameters that match the hook size of the lifting component 3. By arranging multiple positions and multiple numbers of connecting plate hanging points 23, the hanging position can be flexibly selected according to the number of conductor splits and the working space constraints, achieving symmetrical and balanced arrangement of multiple sets of lifting components 3, and ensuring uniform overall force during the tensioning process.

[0036] In this embodiment, the lifting component 3 is a double-hook tensioner, which is suitable for the tensioning operation of large span and high tension conductors in transmission lines. The upper hook of the double-hook tensioner can be detachably connected to the selected connecting plate hanging point 23 on the connecting plate component 2, and the lower hook can be detachably connected to the hanging hole at the end of the clamping plate 4.

[0037] In this embodiment, three clamping plates 4 are used, which are respectively hung on two large connecting plates 21 and one small connecting plate 22. The clamping plates 4 are made of high-strength alloy steel plates. The upward-facing end face of the clamping plate 4 has two grooves 5. The two grooves 5 are arranged at intervals along the length of the clamping plate 4 and are symmetrically arranged with respect to the center of the clamping plate 4. The inner diameter of the groove 5 is adapted to the outer diameter of the connecting bolt at the stress point on the side of the conductor to be replaced. During operation, the connecting bolt can be embedded in the groove 5. The inner sidewall of the groove 5 forms radial limit and axial bearing on the bolt, and the tension of the conductor is smoothly transferred to the connecting plate at the tower side through the bolt, clamping plate 4, and lifting assembly 3, realizing the safe transfer of tension.

[0038] The core working principle of this special equipment is as follows: using the original fixing hardware on the tower side as the only fixed bearing base, the fixing end of the equipment is quickly locked and positioned by the fixing hardware clamp 1, and the multiple hanging points of the connecting plate assembly 2 are adapted to different operating scenarios. By using the extension and retraction of the lifting assembly 3, the axial tension of the conductor and hardware is smoothly and evenly transferred to the special equipment, so that the hardware to be replaced is completely unloaded, realizing stress-free disassembly and assembly. The original force system of the transmission line is not changed throughout the process, thus avoiding the operational risks of conductor slippage and hardware breakage from the root.

[0039] Based on the above structure and working principle, the specific implementation steps of the special equipment in this embodiment are as follows: S1 Preparation before operation: On-site confirmation of the model of the tension fitting to be replaced, the thickness and width of the tower side hanging point connecting plate, and the specifications of the bolts of the tension point connecting the conductor side of the fitting. Accordingly, select the appropriate clamp 4 and double hook tensioner, check that the anti-detachment locking part of the double hook tensioner is in good working order, that the anti-slip engagement teeth of the hanging point connecting plate clamp 1 are not worn, and that all structural parts are free from deformation and cracks. Complete the equipment pre-inspection and compliance verification. S2 Hanging Point End Clip Fixing: Ground workers pre-assemble the hanging point connecting plate clamp 1 and the connecting plate assembly 2 into one unit using high-strength bolts. The assembled fixed end structure is then hoisted to the tower side working position using an insulated hoisting rope. High-altitude workers hold the equipment and precisely clip the downward-facing latch 11 of the hanging point connecting plate clamp 1 onto the hanging point connecting plate on the tower side of the hardware to be replaced from top to bottom. Pressing the equipment ensures that the latch 11 is fully engaged, and the anti-slip teeth tightly abut and lock against the surface of the hanging point connecting plate, completing the installation of the equipment fixed end. No additional drilling or welding is required throughout the process, and the installation time is no more than 2 minutes. S3 Lifting Component Connection: Based on the arrangement of the conductors, symmetrically select corresponding connecting plate hanging points 23 on the outer hanging points 21 on both sides of the connecting plate assembly 2. Hang the upper hooks of the double hook tensioner into the selected connecting plate hanging points 23 respectively, and lock them by engaging the anti-detachment locking device. Then, hang the lower hooks of the double hook tensioner into the hanging holes at the ends of the clamping plate 4 respectively, and lock them by engaging the anti-detachment locking device. Finally, with the groove 5 of the clamping plate 4 facing upward, accurately embed it into the connecting force point bolt of the conductor side hardware to complete the construction of the complete force circuit. S4 Synchronous Tightening and Unloading: The high-altitude worker operates the double-hook tensioner to tighten the screw, causing the clamp 4 and the conductor-side hardware to move smoothly and synchronously towards the tower-side hanging point. This gradually and evenly transfers the axial tension of the hardware to be replaced to the dedicated equipment. After all the double-hook tensioners are fully stressed, continue to tighten synchronously for 5-8 turns. Once it is confirmed that the hardware to be replaced is completely unloaded and its connecting bolts can be easily removed by hand, the tightening operation is stopped. Throughout the process, the synchronous displacement of the four-split conductors is maintained to avoid conductor twisting or uneven stress. S5 Hardware Replacement Operation: The high-altitude worker sequentially removes all connecting bolts of the old hardware to be replaced, removes the old hardware, and aligns and installs the new hardware in its original position. According to the torque values ​​specified in DL / T741-2010 "Operating Regulations for Overhead Transmission Lines," all connecting bolts are tightened diagonally and evenly. Once it is confirmed that the hardware is installed in place and all pins are present, the hardware replacement is complete. S6 Equipment Dismantling and Storage: The operator simultaneously reverses the operation of the double hook tensioner to loosen the screw, allowing the newly installed hardware to gradually bear the tension of the conductor until the hardware is fully stressed and the special equipment is completely unloaded; then, the clamp plate 4 and the double hook tensioner are removed in sequence, and the hanging point connecting plate clamp 1 is lifted upwards to disengage the clamp 11 from the hanging point connecting plate, completing the equipment dismantling. The equipment is then hoisted to the ground using an insulated rope, completing this hardware replacement operation.

[0040] Furthermore, the special equipment in this embodiment can be adapted to the replacement of wire fittings of different specifications such as 2-split, 6-split, and 8-split by increasing or decreasing the number of lifting components 3 and clamps 4; at the same time, the double hook tensioner can be replaced with a hydraulic tensioner or a ratchet tensioner according to the operation requirements, adapting to different tensioning strokes and load requirements, with strong versatility and wide applicability.

[0041] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. These embodiments are merely descriptions of preferred embodiments and are not intended to limit the scope or concept of the invention. The specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. Such combinations, as long as they do not violate the spirit of the present invention, should also be considered as part of this disclosure. To avoid unnecessary repetition, the present invention will not further describe the various possible combinations.

[0042] This invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this invention and without departing from the design idea of ​​this invention, all modifications and improvements made by those skilled in the art to the technical solutions of this invention should fall within the protection scope of this invention. The technical content for which protection is sought in this invention has been fully described in the claims.

Claims

1. A special device for replacing a power transmission line fitting, characterized in that, Includes a hanging point connecting plate clamp (1), a connecting plate assembly (2), at least one set of lifting components (3) and at least one set of clamps (4); The hanging point connecting plate clamp (1) is provided with a downward-facing latch (11). The latch (11) is used to engage and position with the hanging point connecting plate on the side of the hardware to be replaced. The hanging point connecting plate clamp (1) is circumferentially enclosed and fixedly installed with a connecting plate assembly (2). The connecting plate assembly (2) is provided with several connecting plate hanging points (23). A lifting assembly (3) is detachably attached to the connecting plate hanging point (23). A clamp (4) is detachably connected to the other end of the lifting assembly (3). The clamp (4) is provided with an upward-facing groove (5) that matches the connecting force point bolt of the hardware to be replaced.

2. The special device for replacing a power transmission line fitting according to claim 1, characterized in that, The connecting plate assembly (2) includes two large outer connecting plates (21) symmetrically fixed on both sides of the connecting plate clamp (1), and two small outer connecting plates (22) fixed at both ends of the large outer connecting plates (21); the large outer connecting plates (21) and the small outer connecting plates (22) are connected end to end to form a closed frame structure that surrounds the outer periphery of the connecting plate clamp (1).

3. The special device for replacing a power transmission line fitting according to claim 2, characterized in that, The outer side of the large connecting plate (21) of the outer side is provided with at least two connecting plates (211) protruding outward in a direction perpendicular to the plate surface, and the connecting plate hanging point (23) is opened on the connecting plate (211); a number of connecting plate hanging points (23) are evenly arranged in an array along its length direction on the small connecting plate (22) of the outer side.

4. The special apparatus for replacing a power transmission line fitting according to claim 1, characterized by The lifting component (3) is any one of a double hook tensioner, a hydraulic tensioner, or a ratchet tensioner.

5. The special device for replacing a power transmission line fitting according to claim 4, characterized in that, The lifting component (3) is a double hook tensioner, with hooks at both ends of which are respectively connected to the connecting plate hanging point (23) and the clamp plate (4).

6. The special apparatus for replacing a power transmission line fitting according to claim 1, characterized by The clamping plate (4) has multiple grooves (5), which are arranged at intervals along the length of the clamping plate (4) and are symmetrically arranged with respect to the center of the clamping plate (4); the end of the clamping plate (4) is provided with a hooking hole for engaging with the lifting component (3).

7. The special equipment for replacing transmission line fittings according to claim 1, characterized in that, The inner wall of the latch (11) of the hanging point connecting plate clamp (1) is provided with anti-slip engagement teeth, which abut against and limit the surface of the connecting plate at the end of the fitting.

8. The special device for replacing a power transmission line fitting according to claim 4, characterized by Both ends of the double-hook tensioner are equipped with anti-detachment locking devices, which are spring-loaded snap-locking structures.

9. A method of using a specialized apparatus for replacing a power transmission line fitting, the method comprising: The special equipment for replacing transmission line fittings according to any one of claims 1-8 includes the following steps: S1: Preparation before operation: Confirm the model of the hardware to be replaced, the specifications of the tower side hanging point connecting plate, the specifications of the bolts at the hardware connection stress point and the number of conductor splits, select the corresponding number of matching clamps (4) and lifting components (3), and check the integrity of the equipment parts; S2: Hanging point end clamping and fixing: The pre-assembled hanging point connecting plate clamp (1) and connecting plate assembly (2) are hoisted into the air and clamped from top to bottom onto the hanging point connecting plate on the side of the hardware tower to be replaced through the downward-opening clamp (11), thus completing the locking installation of the equipment fixing end. S3: Lifting component connection: Based on the number of wire splits and the working space, select the corresponding connecting plate hanging point (23) on the connecting plate component (2), and hang the upper hook of the lifting component (3) on the selected connecting plate hanging point (23), and hang the lower hook on the hanging hole at the end of the clamp (4). S4: Synchronous tensioning and unloading: Synchronously operate all lifting components (3) to tighten, drive the conductor side hardware to move synchronously to the tower side hanging point end, so that the axial tension of the hardware to be replaced is gradually transferred to the special equipment until the hardware to be replaced is completely unloaded and the connecting bolts can be disassembled without obstacles. S5: Fitting replacement operation: Remove the old fittings to be replaced, align and install the new fittings, and tighten all connecting bolts to the torque specified by the power industry, and confirm that the fittings are installed in place; S6: Equipment dismantling and storage: Reverse operation to slowly loosen the lifting component (3) so that the newly installed hardware can fully bear the tension of the wire. Then, dismantle the lifting component (3), clamp (4), and hanging point connecting plate clamp (1) in sequence to complete the hardware replacement operation.

10. The method of use of claim 9, wherein, In step S5, a double hook tensioner is used as a lifting component (3). After the double hook tensioner is fully stressed, it is tightened for another 5-8 turns to complete the tensioning and unloading operation.

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