Method of live replacement of insulators in a jumper string

Abstract

The application provides a method for live replacement of a jumper string insulator, comprising the following steps: a tower electrician and an equipotential electrician reach a corresponding work point; two pulleys are hung on both ends of a cross arm, the two ends of a control rope are threaded through the pulleys and extended to the ground, the control rope between the two pulleys is connected with a weight, a ground staff pulls the movable end of the control rope downward, the load at the weight is transferred, and the jumper insulator string is not stressed; a new jumper insulator string is replaced; the old jumper insulator string is removed, and the staff gets off the tower, and the replacement of the jumper insulator string is completed. The pulley block and the weight are used in cooperation, the support of the weight can be completed on the ground, extra staff is not needed to support the weight in the air, the staff at the jumper is reduced, the possibility of accidental collision is reduced, the movable opening of the first insulator is increased, and the old jumper insulator string is conveniently taken off and the new jumper insulator string is conveniently restored.

Description

Technical Field

[0001] This invention belongs to the field of power maintenance technology, specifically relating to a method for replacing jumper string insulators under energized conditions. Background Technology

[0002] An insulator is a device installed between conductors at different potentials or between a conductor and a grounding structure, capable of withstanding voltage and mechanical stress. An insulator consists of two main parts: the insulating element and the connecting hardware at both ends of the insulating element, giving the insulator both electrical insulation and mechanical fixation functions. Insulators can be classified into suspension insulators and post insulators according to their installation method. Multiple insulators are connected at both ends to form a jumper insulator string, used to suspend conductors and insulate them from the transmission tower and the ground.

[0003] In ultra-high voltage overhead transmission lines, the jumper device of the tension tower is used to connect the conductors on both sides of the tension tower and to the insulator string, ensuring the continuity of conductivity on both sides of the tension tower. To limit the wind-induced swaying of the jumper, a jumper insulator string needs to be installed between the jumper and the crossarm on the tension tower. The specific connection method of the jumper insulator string is as follows: one end of the jumper insulator string is set on the crossarm of the tension tower, and the other end is connected to a counterweight. The counterweight is connected to the jumper. The counterweight is set to prevent the jumper from swinging or swaying significantly under strong winds, icing, and various stresses, which could lead to dangerous situations such as detachment from the jumper insulator string and grounding. The counterweight balances and eliminates the influence of various external forces on the jumper through the downward force of its own weight. During long-term operation, jumper insulator strings are affected by operating environment factors, natural environment factors, and human factors, and often spontaneously explode or become dirty. Considering the safe and stable operation of transmission lines, and without ensuring that the line remains powered, it is necessary to replace spontaneously exploded or dirty jumper insulator strings under live working conditions.

[0004] Currently, the replacement method for jumper insulator strings mainly involves using a screw rod, insulating pull plate, and suspension hook. Two sets of screw rods, insulating pull plates, and suspension hook assemblies are installed on both sides of the jumper insulator string and the counterweight. One end of the insulating pull plate connects to the crossarm, and the other end connects to one end of the screw rod. The other end of the screw rod connects to the suspension hook, which connects to the jumpers on both sides of the counterweight. During use, the suspension hook is adjusted upwards by the screw rod, thereby lifting the jumpers and reducing the stress on the jumper insulator string. The electrician uses a pin remover to remove the spring pin between the ball head plate of the first insulator and the cup head plate of the counterweight, detaching the jumper insulator string from the counterweight. The tower electrician disconnects the jumper insulator string from the crossarm and, in coordination with the ground electrician, lowers the old jumper insulator string and hoists the new one. The new jumper insulator string is then installed in the reverse order.

[0005] However, in the above replacement method, due to the large weight of the counterweight, after the counterweight is disconnected from the original jumper insulator string, the jumper wire slides towards the counterweight inside the hook, causing the counterweight to fall. When the new jumper insulator string is connected to the counterweight, multiple electricians are needed to support the counterweight. This requires a large number of workers at height at the counterweight location. With jumpers installed at the counterweight location and a large number of workers at height, accidental collisions are likely to occur, resulting in low safety. Summary of the Invention

[0006] This application provides a method for replacing jumper string insulators under energized conditions. By using a pulley block and a "soft connection" method, the weight is reliably fixed. After the load is transferred, the weight does not fall or shift. This increases the opening of the first insulator, solving the problem of narrow space between the weight falling and the first insulator and the weight mounting plate.

[0007] This embodiment provides a method for replacing jumper string insulators under energized conditions, including the following steps:

[0008] Electricians on the tower carried insulated transfer ropes and working tools to climb to both ends of the crossarm of the tension tower;

[0009] Equipotential electricians carry insulated transfer ropes and working tools to the work point at the counterweight.

[0010] Ground personnel pass the pulley system to the tower electricians at both ends of the crossarm. The pulley system includes a control rope and two pulleys. The tower electricians at both ends of the crossarm attach the two pulleys to the two ends of the crossarm. The movable ends of the control rope, which are far apart from each other, pass through the pulleys and extend to the ground. The control rope between the two pulleys is connected to the counterweight. Ground personnel pull down the movable end of the control rope to transfer the load at the counterweight, so that the jumper insulator string is not under stress.

[0011] The equipotential electrician disconnects the weight and the jumper insulator string, and the ground personnel loosen the control rope, allowing the jumper and the weight to fall a predetermined distance. The tower electrician removes the jumper insulator string, and the ground personnel lift the new jumper insulator string to the replacement location. The ground personnel tighten the control rope, which moves the weight closer to the bottom of the new jumper insulator string. The equipotential electrician then reconnects the new jumper insulator string to the weight.

[0012] The pulley blocks were dismantled and personnel were removed from the tower in sequence to complete the replacement of the jumper insulator strings.

[0013] In one feasible implementation, the removal of the pulley block includes:

[0014] Ground personnel smoothly release the control rope, transferring the load of the counterweight to the new jumper insulator string. The tower electrician removes the pulley block, and the equipotential electrician removes the control rope and the counterweight, then transfers the pulley block to the ground via the insulated transfer rope.

[0015] In one feasible implementation, the personnel descending the tower includes:

[0016] The tower electrician and the equipotential electrician inspected each connection component of the new jumper insulator string, and after confirming that the connection was good and there were no leftovers, they carried the insulating transfer rope down the tower.

[0017] In one feasible implementation, the equipotential electrician reaches the work point at the counterweight via a suspended basket or insulated rope ladder, and ground personnel conduct an impact test on the suspended basket or insulated rope ladder. After passing the test, the suspended basket or insulated rope ladder is lifted.

[0018] In one feasible implementation, the control rope between the two pulleys is connected to the counterweight by rope binding or by a counterweight bearing tool.

[0019] In one feasible implementation, the weight-bearing tool includes a horizontal part and two vertical parts perpendicular to the horizontal part. Both ends of the horizontal part are provided with connecting rings, and the two connecting rings are respectively connected to the connecting ends of the two control ropes. The ends of the two vertical parts away from the horizontal part are provided with corresponding through holes. The two vertical parts are engaged with the connecting plate of the weight, and the two vertical parts are connected to the connecting plate of the weight by bolts.

[0020] In one feasible implementation, the preset distance is 0.2m-0.5m.

[0021] In one feasible implementation, the specific steps for removing the jumper insulator string are as follows: the electrician on the tower uses a hoisting rope to tie the jumper insulator string to the side of the crossarm, and the ground personnel use a hoisting assembly to lift the jumper insulator string. After the electrician on the tower disconnects the jumper insulator string from the crossarm, the jumper insulator string is lowered to the ground through an insulated transfer rope.

[0022] The specific steps for ground personnel to lift the new jumper insulator string to the replacement location are as follows: ground personnel use the lifting assembly to lift the new jumper insulator string to the replacement location, and the tower electrician connects the new jumper insulator string to the crossarm and then unties the lifting rope.

[0023] In one feasible implementation, the specific operation by which the equipotential electrician disconnects the weight and the jumper insulator string is as follows: the equipotential electrician uses a pin remover to remove the spring pin between the ball head plate of the first insulator of the jumper insulator string and the cup head plate of the weight, thereby detaching the jumper insulator string from the weight.

[0024] In one feasible implementation, the hoisting assembly is a motorized winch or a manual winch.

[0025] This application provides a method for replacing jumper string insulators under energized conditions. By using a pulley system, a "soft connection"—that is, a connection between the pulley system and the counterweight—is employed to transfer the load. The pulley system includes a control rope and two pulleys. The two pulleys are positioned on crossarms above the counterweight on both sides. The control rope is connected to the counterweight, reliably securing it. The movable ends of the control rope, which are far apart, pass through the pulleys and extend to the ground. The control rope between the two pulleys is connected to the counterweight. Ground personnel can pull the movable end of the control rope to move the counterweight upwards, thus supporting it from the ground. After the load is transferred, the counterweight does not fall or shift. This increases the opening of the first insulator, facilitating the removal of the old jumper string insulator and the restoration of the new one. It eliminates the need for additional personnel to support the counterweight at a height, reducing the number of workers at the jumper and the possibility of accidental contact. Furthermore, the pulley system allows for easier application of force. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a method for replacing jumper string insulators under energized conditions according to an embodiment of this application;

[0027] Figure 2 yes Figure 1 A schematic diagram of the structure of the weight-bearing tool in the diagram.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100 - Weight-bearing tool; 200 - Pulley; 300 - Control rope; 400 - Weight; 500 - Crossbeam;

[0030] 110 - Horizontal part; 120 - Vertical part; 130 - Connecting ring. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0032] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] In related technologies, the replacement method for jumper insulator strings mainly involves using a screw, insulating pull plate, and suspension hook. Specifically, two sets of screw, insulating pull plate, and suspension hook assemblies are installed on both sides of the jumper insulator string and the counterweight. One end of the insulating pull plate is connected to the crossarm, and the other end is connected to one end of the screw. The other end of the screw is connected to the suspension hook, which is connected to the jumpers on both sides of the counterweight. During use, the suspension hook is adjusted upwards by adjusting the screw, thereby adjusting the jumpers and reducing the stress on the jumper insulator string. The electrician uses a pin remover to remove the spring pin between the ball head plate of the first insulator and the cup head plate of the counterweight, detaching the jumper insulator string from the counterweight. The tower electrician disconnects the jumper insulator string from the crossarm and, in coordination with the ground electrician, lowers the old jumper insulator string and hoists the new one. The new jumper insulator string is then installed in the reverse order.

[0036] However, in the above replacement method, due to the large weight of the counterweight, after the counterweight is disconnected from the original jumper insulator string, the jumper wire slides towards the counterweight inside the hook, causing the counterweight to fall. When the new jumper insulator string is connected to the counterweight, multiple electricians are needed to support the counterweight. This requires a large number of workers at height at the counterweight location. With jumpers installed at the counterweight location and a large number of workers at height, accidental collisions are likely to occur, resulting in low safety.

[0037] Therefore, a method for replacing jumper string insulators under energized conditions is needed, employing a pulley system. This system includes a control rope and pulleys. Two pulleys are positioned on a crossarm above the weight on either side. The control rope is connected to the weight, with its movable ends passing through the pulleys and extending to the ground. The control rope between the two pulleys is connected to the weight. Ground personnel can pull the movable end of the control rope to move the weight upwards, allowing for support of the weight from the ground. This eliminates the need for additional personnel to support the weight at a height, reducing the number of workers at the jumper and minimizing the possibility of accidental contact. This addresses the problem mentioned above, where replacing jumper string insulators requires multiple electricians to support the weight and necessitates a large number of personnel working at height.

[0038] Figure 1 This is a schematic diagram of a method for live replacement of jumper string insulators according to an embodiment of this application. See also... Figure 1 As shown, this embodiment provides a method for replacing jumper string insulators under live conditions, including the following steps:

[0039] S100, the tower electrician carries the insulated transfer rope and working tools to both ends of the crossarm 500 of the tension tower, fastens the safety belt, and hangs the insulated transfer rope in the appropriate position.

[0040] S200, Equipotential electricians carry insulated transfer ropes and working tools to the work point at 400 weights;

[0041] In some examples, equipotential electricians reach the work point at 400 meters using a suspended platform or insulated ladder. Ground personnel then conduct an impact test on the suspended platform or insulated ladder, and lift the platform or ladder only after it passes the test.

[0042] After the equipotential electrician passes the impact test on the backup protective rope at 500mm below the crossarm, he or she enters the electric field by riding in a basket or insulated ladder after securing the backup protective rope. Once the equipotential electrician reaches the designated position, he or she checks that the shielding suit and all connection points are normal, reports to the work supervisor, and, after receiving permission from the work supervisor, grabs the conductor to perform equipotential testing.

[0043] S300: Ground personnel transfer the pulley system to the tower electricians at both ends of the crossarm 500. The pulley system includes a control rope 300 and two pulleys 200. The tower electricians at both ends of the crossarm 500 attach the two pulleys 200 to the two ends of the crossarm 500. The two movable ends of the control rope 300, which are far apart from each other, pass through the pulleys 200 and extend to the ground. The control rope 300 between the two pulleys 200 is connected to the counterweight 400. The equipotential electrician connects the control rope 300 to the counterweight 400. Ground personnel pull down the movable end of the control rope 300 to transfer the load at the counterweight 400 to the control rope 300 of the pulley system. The opening between the control ropes 300 on both sides of the counterweight 400 increases, and the cup on the counterweight 400 is released, so that the jumper insulator string is no longer under stress.

[0044] The specific structure of the pulley system can be found in the relevant content of pulley systems in the existing technology, and will not be repeated here.

[0045] The control rope 300 is connected to the hammer 400 by rope binding or by the hammer bearing tool 100.

[0046] Figure 2 yes Figure 1 Schematic diagrams of the weight-bearing tool in some examples. See also Figure 2 As shown, the weight-bearing tool 100 includes a horizontal part 110 and two vertical parts 120 of the horizontal part 110. Both ends of the horizontal part 110 are provided with connecting rings 130. The two connecting rings 130 are respectively connected to the connecting ends of the two control ropes 300. The ends of the two vertical parts 120 away from the horizontal part 110 are provided with corresponding through holes. The two vertical parts 120 are engaged with the connecting plate of the weight 400 and are connected to the connecting plate of the weight 400 by bolts.

[0047] In this embodiment, the weight-bearing tool 100 is anchored to the weight 400 via a connecting plate to reliably fix the weight 400. After the load is transferred, the weight 400 does not fall or shift. This increases the movable opening at the first suspension insulator, facilitating the removal and removal of the original jumper insulator string and the connection of the new jumper insulator string. Compared with the rope binding method, the weight-bearing tool 100 is quick to install, easy to operate, and has a reliable connection, which can greatly shorten the installation time of the tool.

[0048] S400: The equipotential electrician disconnects the weight 400 from the jumper insulator string. Ground personnel slowly loosen the control rope 300, causing the jumper and weight 400 to fall a preset distance. The tower electrician removes the jumper insulator string, and ground personnel lift the new jumper insulator string to the replacement location. Ground personnel tighten the control rope 300, which drives the weight-bearing tool 100 and the weight 400 towards the bottom of the new jumper insulator string. The equipotential electrician then reconnects the new jumper insulator string to the weight 400.

[0049] In some examples, the specific operation by which the equipotential electrician disconnects the weight 400 and the jumper insulator string is as follows: the equipotential electrician uses a pin remover to remove the spring pin between the ball head plate of the first insulator of the jumper insulator string and the cup head plate of the weight 400, thereby detaching the jumper insulator string from the weight 400.

[0050] In some examples, the preset distance is 0.2m-0.5m. For example, in specific settings, the preset distance for the 400-weighted hammer to fall can be a suitable distance such as 0.2m, 0.3m, 0.4m or 0.5m. During the fall, a sufficient safe distance must be maintained from the surrounding tower materials.

[0051] When the preset distance is large, ground personnel need to extend the control rope 300 for a longer distance and also need to retract the control rope 300 for a longer distance, which takes a long time and affects work efficiency. When the preset distance is small, the counterweight 400 is close to the jumper insulator string, which affects the operation of removing the jumper insulator string.

[0052] In this embodiment, the jumper wire and the counterweight 400 are lowered a preset distance to prevent the jumper wire from continuously charging the jumper wire insulator string after the connection between the counterweight 400 and the jumper wire insulator string is disconnected.

[0053] In some examples, the specific steps for removing the jumper insulator string are as follows: the electrician on the tower uses a hoisting rope to secure the third suspension insulator on the 500 side of the crossarm, and the ground personnel use a hoisting assembly to lift the jumper insulator string. After the electrician on the tower removes the pin of the first suspension insulator on the 500 side of the crossarm, the connection between the jumper insulator string and the crossarm 500 is released, and the jumper insulator string is slowly lowered to the ground.

[0054] In some examples, the specific steps for ground personnel to lift the new jumper insulator string to the replacement location are as follows: Under the direction of the tower electrician, the ground personnel use a hoisting assembly to lift the new jumper insulator string to the replacement location; the tower electrician connects the new jumper insulator string to the crossarm 500; the ground personnel tighten the control rope 300; and, in coordination with the equipotential electrician, connect the new jumper insulator string to the counterweight 400 and install the pin.

[0055] The hoisting components are either motorized or manual winches.

[0056] In this embodiment of the application, when removing the original jumper insulator string and installing the new jumper insulator string, the control rope 300 is controlled by ground personnel to move the counterweight 400 up and down, thereby allowing the counterweight 400 to move closer to or away from the jumper insulator string. No additional electricians are needed to support the counterweight 400, saving manpower and reducing safety risks.

[0057] S500, proceed with the removal of the pulley block and the counterweight support tool 100 in sequence, and the personnel descend from the tower to complete the replacement of the jumper insulator string.

[0058] In some examples, the removal of the pulley system and the descent of personnel from the tower include:

[0059] S600, ground personnel smoothly release control rope 300, transfer the load of counterweight 400 to the new jumper insulator string, tower electrician removes pulley block, equipotential electrician removes counterweight and control rope 300, and transfers pulley block to the ground through insulated transfer rope;

[0060] S700, the tower electrician and the equipotential electrician inspected each connection component of the new jumper insulator string, and after confirming that the connection was good and there were no leftovers, carried the insulating transfer rope down the tower.

[0061] The following is a specific example of a novel linear guide machining method:

[0062] Tower electrician climbing the tower: The tower electrician carries the insulated transfer rope and working tools to both ends of the crossarm of the tension tower, fastens the safety belt, and hangs the insulated transfer rope in the appropriate position;

[0063] Equipotential electrician climbing the tower: After the ground personnel conduct an impact test on the suspended platform and it passes the test, the suspended platform is lifted. After the equipotential electrician conducts an impact test on the backup protective rope at 500mm below the crossarm and it passes the test, and after the backup protective rope is secured, the equipotential electrician carries the insulated transfer rope and working tools and enters the electric field in the suspended platform. After the equipotential electrician reaches the designated position, he / she checks the shielding suit and all connection points and reports to the work supervisor. After obtaining the work supervisor's permission, he / she grabs the conductor and performs equipotential testing.

[0064] Transferring the load on the jumper insulator string: Ground personnel transfer the pulley block to the electricians on the tower at both ends of the crossarm 500, and transfer the counterweight bearing tool 100 to the equipotential electrician. The counterweight bearing tool 100 includes a horizontal part 110 and two vertical parts 120 of the horizontal part 110. Each end of the horizontal part 110 is equipped with a connecting ring 130, which connects to the connecting ends of the two control ropes 300. Each of the two vertical parts 120 has corresponding through holes at the end furthest from the horizontal part 110. The two vertical parts 120 are engaged with the connecting plate of the counterweight 400, and bolts are used to connect the two vertical parts 120 to the connecting plate of the counterweight 400. The pulley block... The system includes a control rope 300 and two pulleys 200. The tower electricians at both ends of the crossarm 500 attach the two pulleys 200 to the two ends of the crossarm 500 respectively. The two movable ends of the control rope 300, which are far apart from each other, pass through the pulleys 200 and extend to the ground. The control rope 300 between the two pulleys 200 is connected to the counterweight bearing tool 100. The equipotential electrician connects the counterweight bearing tool 100 to the counterweight 400. The ground personnel pull down the movable end of the control rope 300 to transfer the load at the counterweight 400 to the control rope 300 of the pulley block. The opening between the control ropes 300 on both sides of the counterweight 400 increases, and the cup head on the counterweight 400 is released, so that the jumper insulator string is not stressed.

[0065] Replacing the jumper insulator string: The equipotential electrician uses a pin remover to remove the spring pin between the ball head plate of the first insulator of the jumper insulator string and the cup head plate of the counterweight 400, thus detaching the jumper insulator string from the counterweight 400. Ground personnel slowly release the control rope 300, allowing the jumper and counterweight 400 to fall 0.3m. The tower electrician uses a hoisting rope to secure the third suspension insulator on the 500 side of the crossarm. Ground personnel use a hoisting assembly to lift the jumper insulator string, and then the tower electrician removes the pin from the first suspension insulator on the 500 side of the crossarm. Afterwards, disconnect the jumper insulator string from the crossarm 500, and slowly lower the jumper insulator string to the ground. Under the command of the tower electrician, the ground personnel use a motorized winch to lift the new jumper insulator string to the replacement location. The tower electrician connects the new jumper insulator string to the crossarm 500, and the ground personnel tighten the control rope 300. The control rope 300 drives the counterweight support tool 100 and the counterweight 400 to approach the bottom of the new jumper insulator string. With the help of the equipotential electrician, the new jumper insulator string is connected to the counterweight 400, and the spring pin is installed.

[0066] Removal of pulley block and counterweight load-bearing tool 100: Ground personnel smoothly release control rope 300, transfer the load of counterweight 400 to the new jumper insulator string, tower electrician removes pulley block, equipotential electrician removes counterweight load-bearing tool combination, and transfers pulley block and counterweight load-bearing tool combination to the ground through insulated transfer rope;

[0067] Personnel descending the tower: The electricians and equipotential electricians on the tower inspect the tension tower, confirm that there are no leftover objects, and report to the person in charge of the work before descending the tower with the insulated transfer rope. Ground personnel organize tools, clean up the work site, and complete the replacement of the jumper insulator strings.

[0068] This application employs two pulley systems and a counterweight support tool 100 for use. Each pulley system includes a control rope 300 and a pulley 200. The two pulleys 200 are mounted on crossarms 500 above both sides of the counterweight 400. The counterweight support tool 100 is connected to the counterweight 400. The movable ends of the two control ropes 300, which are far apart from each other, pass through the pulleys 200 and extend to the ground. The connecting ends of the two control ropes 300, which are close together, are connected to the counterweight support tool 100. Ground personnel can pull the movable ends of the control ropes 300 to move the counterweight 400 upward by the counterweight support tool 100. This allows for ground support of the counterweight 400 without the need for additional personnel to support it at a height, reducing the number of workers at the jumper and the possibility of accidental contact. Furthermore, the pulley system facilitates easier application of force, improves work efficiency, enables live-line work, enhances power supply reliability, and avoids power outages for maintenance.

[0069] It should be noted that the numerical values ​​and ranges involved in the embodiments of this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0070] Readers should understand that in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "some examples," "specific example," or "some examples," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A method for replacing jumper string insulators under energized conditions, characterized in that, Includes the following steps: Electricians on the tower carry insulated transfer ropes and working tools to climb to both ends of the crossarm (500) of the tension tower; An equipotential electrician carrying an insulated transfer rope and working tools arrives at the work point at the counterweight (400). Ground personnel pass the pulley system to the tower electricians at both ends of the crossarm (500). The pulley system includes a control rope (300) and two pulleys (200). The tower electricians at both ends of the crossarm (500) hang the two pulleys (200) on both ends of the crossarm (500). The movable ends of the control rope (300) that are far apart pass through the pulleys (200) and extend to the ground. The control rope (300) between the two pulleys (200) is connected to the counterweight (400). Ground personnel pull down the movable end of the control rope (300) to transfer the load at the counterweight (400) so that the jumper wire string is not stressed. The equipotential electrician disconnects the weight (400) from the old jumper insulator string, and the ground personnel loosen the control rope (300) so that the jumper and the weight (400) fall a preset distance. The tower electrician removes the jumper insulator string, and the ground personnel lift the new jumper insulator string to the replacement location. The ground personnel tighten the control rope (300), and the control rope (300) moves the weight (400) closer to the bottom of the new jumper insulator string. The equipotential electrician then restores the connection between the new jumper insulator string and the weight (400). The pulley blocks were dismantled and personnel were removed from the tower in sequence to replace the jumper insulator strings. The equipotential electrician reaches the work point at the weight (400) via a suspended basket or insulated rope ladder. Ground personnel conduct an impact test on the suspended basket or insulated rope ladder. After passing the test, the suspended basket or insulated rope ladder is lifted. The control rope (300) between the two pulleys (200) is connected to the counterweight (400) by rope binding or by counterweight bearing tool (100); The weight-bearing tool (100) includes a horizontal part (110) and two vertical parts (120) perpendicular to the horizontal part (110). Both ends of the horizontal part (110) are provided with connecting rings (130). The two connecting rings (130) are respectively connected to the connecting ends of the two control ropes (300). The ends of the two vertical parts (120) away from the horizontal part (110) are provided with corresponding through holes. The two vertical parts (120) are engaged with the connecting plate of the weight (400). The two vertical parts (120) are connected to the connecting plate of the weight (400) by bolts.

2. The method for live replacement of jumper string insulators according to claim 1, characterized in that, The removal of the pulley block includes: Ground personnel smoothly release the control rope (300), transferring the load of the counterweight (400) to the new jumper insulator string. The tower electrician removes the pulley block, and the equipotential electrician removes the control rope (300) and the counterweight (400), and transfers the pulley block to the ground through the insulated transfer rope.

3. The method for live replacement of jumper string insulators according to claim 1, characterized in that, The personnel descending the tower include: The tower electrician and the equipotential electrician inspected each connection component of the new jumper insulator string, and after confirming that the connection was good and there were no leftovers, they carried the insulating transfer rope down the tower.

4. The method for live replacement of jumper string insulators according to claim 1, characterized in that, The preset distance is 0.2m-0.5m.

5. A method for live replacement of jumper string insulators according to claim 1, characterized in that, The specific steps for removing the jumper insulator string are as follows: the electrician on the tower uses a hoisting rope to tie the jumper insulator string to the side of the crossarm (500), and the ground personnel use a hoisting assembly to pull up the jumper insulator string. After the electrician on the tower disconnects the jumper insulator string from the crossarm (500), the jumper insulator string is lowered to the ground through an insulated transfer rope. The specific steps for ground personnel to lift the new jumper insulator string to the replacement location are as follows: Ground personnel use the lifting assembly to lift the new jumper insulator string to the replacement location, and the tower electrician connects the new jumper insulator string to the crossarm (500) and then unties the lifting rope.

6. The method for live replacement of jumper string insulators according to claim 1, characterized in that, The specific operation of the equipotential electrician to disconnect the weight (400) and the jumper insulator string is as follows: the equipotential electrician uses a pin remover to remove the spring pin between the ball head plate of the first insulator of the jumper insulator string and the cup head plate of the weight (400), so that the jumper insulator string is disconnected from the weight (400).

7. A method for live replacement of jumper string insulators according to claim 5, characterized in that, The hoisting assembly is a motorized winch or a manual winch.

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