Power transmission line ground wire replacement construction method

Abstract

The invention relates to the technical field of high-voltage power transmission line construction, in particular to a power transmission line ground wire replacement construction method, which comprises the following steps of: installing a paying-off tackle on a tangent tower, and moving an old wire on the tangent tower into the paying-off tackle from an original suspension position of the old wire; a tension field and a traction field are arranged at the two ends of the line segment interval respectively, then the end of the old wire is removed from the original anchoring position on the first strain tower and the second strain tower respectively, and then a traction pipe or a traction assembly is installed at the end of the old wire; connecting the end part of the old wire with a new wire spread by a tensioner through a connecting device; the old wire is pulled by the traction equipment of the traction field, so that the new wire is synchronously unfolded under the traction of the old wire and the tensioning of the tensioner to complete replacement, and the technical problems of high construction risk, long period, high cost and harsh requirements on the operation field in the complex crossing environment of the traditional process of disassembling first and then unfolding can be solved.

Description

Technical Field

[0001] This invention relates to the field of high-voltage transmission line construction technology, and more specifically, to a method for replacing conductors and ground wires in transmission lines. Background Technology

[0002] To increase the transmission capacity of power transmission lines, it is necessary to upgrade the conductors and ground wires of the power transmission lines. Traditional upgrade work usually involves first removing the conductors and ground wires, and then re-laying the guide ropes and conductors and ground wires. This will increase the construction period and construction risks, and will place higher demands on tools and tensioning equipment, especially in large-span sections that cross important facilities such as rivers, railways, and highways.

[0003] While this method is technically mature, it presents numerous challenges in complex environments such as long-span crossings: First, during the dismantling of the old line and the initial deployment of the guide rope, the rope is highly susceptible to contact or falling onto waterways, highways, buildings, or power lines below, posing extremely high safety risks and potentially causing significant socio-economic impacts. Second, the construction process is cumbersome and time-consuming, especially in scenarios requiring coordination of navigation and road closures, resulting in substantial time and compensation costs. Third, it places high demands on the work sites, such as the tensioning yard, making it difficult to implement in densely populated areas with limited access. In short, the traditional "dismantle first, then deploy" construction method suffers from high construction risks, long cycles, high costs, and stringent requirements for work sites in complex crossing environments. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method for replacing conductors and ground wires in transmission lines. This method uses a "one-to-one" pull mechanism to pull the new conductor while maintaining the old conductor, thus solving the technical problems of high construction risk, long cycle, high cost, and stringent requirements for the work site associated with the traditional "remove first, then place" process in complex crossing environments.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A method for replacing conductors and ground wires in a transmission line, wherein the section of the line where the conductors and ground wires are to be replaced includes multiple tension towers and at least two straight-line towers, wherein the tension towers are located on both sides of the section of the line, and the straight-line towers are located in the middle of the section of the line, and the steps include: Install a wire-laying pulley on the straight-line tower and move the old conductor from its original suspension position to the wire-laying pulley. Set up tension fields and traction fields at both ends of the line segment. Then, on the first tension tower on the tension field side and the second tension tower on the traction field side of the line segment, release the end of the old conductor from its original anchoring position. Then, install a traction pipe or traction assembly on the end of the old conductor. Connect the end of the old conductor on the tension field side to the new conductor laid out by the tension machine in the tension field through a connecting device. Use the traction equipment in the traction field to pull the old conductor, so that the new conductor is laid out synchronously under the traction of the old conductor and the tension of the tension machine to complete the replacement.

[0006] This invention utilizes the old conductor to pull the new conductor in a one-to-one manner to complete the replacement of the old and new conductors, thereby avoiding the highest risk of the ropes falling to the ground during the removal of the old line and the initial deployment of the new line. It achieves the replacement of the conductor and ground wire without touching the ground throughout the entire process, which is especially suitable for large-span sections with complex underground environments and limited space. It can significantly reduce safety risks, shorten the construction period, and reduce external coordination and compensation costs.

[0007] Preferably, a wire-laying pulley is installed on the straight-line tower, and the old conductor on the straight-line tower is moved from its original suspension position to the wire-laying pulley. Specifically, this includes: removing the old conductor from the suspension insulator string on the straight-line tower; installing a bracket at the original suspension point of the suspension insulator string and suspending the wire-laying pulley on the bracket; and placing the old conductor in the wire-laying pulley.

[0008] Preferably, the hanger is hung on the crossarm of the straight tower, wherein the upper part of the hanger is provided with a connecting part, the crossarm is provided with a hanging point for fixing the suspension insulator string, and the connecting part is connected to the hanging point; the wire-laying pulley is hung on the lower part of the hanger.

[0009] In this invention, a special bracket for this construction method is used. The bolt hole spacing of the connecting plate on the upper part of the bracket is exactly the same as the bolt hole spacing of the original insulator string hanging points on the crossarm of the straight tower. This allows the bracket to be directly and precisely installed on the same set of bolts, just like the original insulator string. The lower part of the bracket is designed for suspending the wire laying pulley.

[0010] As a preferred embodiment, a first wire clamp is installed on the crossarm of the first tension tower on the tension field side, 30m away from the first tension clamp of the old conductor, to fix the old conductor; the first wire clamp is connected to the crossarm of the first tension tower by four sets of 8t pulley blocks; the ground winch connected to the pulley blocks is started to tighten the pulley blocks to loosen the first tension clamp; four sets of secondary insulators are arranged to fix the old conductor to the tower body of the first tension tower; the first tension clamp and the first tension insulator string are removed.

[0011] After the first tension clamp is loosened and removed, the heavy tension insulator string must be safely lowered to the ground using wire ropes and a steering pulley installed on the tower. The first pulley group of the second-stage transmission line is a four-wheel pulley group consisting of two fixed pulleys and two movable pulleys. The second pulley group consists of φ22 Dyneema rope, a 10t shackle, and a 60kN special wire clamp, used to anchor the conductor, prevent the first pulley group from failing, and ensure the safety of the entire construction process.

[0012] Preferably, the first tension clamp is cut and disconnected, and removed from the old conductor; a traction tube is crimped onto the end of the old conductor where the first tension clamp was originally connected.

[0013] After the old conductor end and the discarded first tension clamp are brought to a safe area on the ground, the conductor is cut using hydraulic shears, and the old first tension clamp is removed. The exposed conductor end is carefully ground to remove burrs, and then a special traction tube is crimped onto it using a hydraulic press, becoming the standard temporary end of the old conductor on the tension field side.

[0014] Preferably, the traction tube is connected to the new conductor deployed by the tension machine via a first rotary connector, a first traction rope, and a second rotary connector connected in sequence.

[0015] The first traction rope is a φ18 traction rope approximately 5 meters long, serving as a buffer section. Both the first and second rotary connectors are 8t rotary connectors. The connection sequence is as follows: old wire traction tube, 8t rotary connector, 5m long φ18 traction rope, 8t rotary connector, new wire traction tube, and new wire.

[0016] As a preferred embodiment, a second wire clamp is installed on the crossarm of the second tension tower on the traction side, 5m away from the second tension clamp of the old conductor, to secure the old conductor; the second wire clamp is connected to the crossarm of the second tension tower by four sets of 8t pulley blocks; the ground winch connecting the pulley blocks is activated to tighten the pulley blocks and loosen the second tension clamp; four sets of secondary insulators are arranged to fix the old conductor to the tower body of the second tension tower; the second tension clamp and the second tension insulator string are removed.

[0017] After removing the second tension clamp and the second tension insulator string, the old conductor ends were brought to the ground for processing.

[0018] Preferably, the second tension clamp is cut and disconnected, and removed from the old conductor; a traction assembly is connected to the end of the old conductor where the second tension clamp was originally connected; wherein, the traction assembly, from the end of the old conductor to the traction device, includes: a single-headed mesh connector, a bending connector, and a second traction rope.

[0019] The conductor end is directly gripped using a single-headed mesh connector and then connected to the second traction rope via an anti-bending connector. The second traction rope is a φ18 main traction rope. The traction equipment in the traction field uses an integrated tensioning machine, with each machine pulling one main traction rope. The roller structure of the integrated tensioning machine allows the conductor to pass directly through, thus achieving a direct and efficient connection between the old conductor and the traction power, eliminating the need for the complex rope-reversing device in front of the traditional traction machine.

[0020] As a preferred method, start the tensioning machine. After the tensioning machine stretches the tension to the tension field and the force stabilizes, reverse the ground winch connected to the first pulley group and remove the first pulley group. If the force is still stable at the tension field after removal, remove the four sets of secondary protection devices. Start the traction equipment. After the traction equipment pulls the tension to the traction field and the force stabilizes, reverse the ground winch connected to the second pulley group and remove the second pulley group. If the force is still stable at the traction field after removal, remove the four sets of secondary protection devices.

[0021] In the tension field, the tensioning machine is first activated to apply a small, stable tension to the conductor. After confirming the reliability of the force-bearing system, the temporary first pulley block and the second pulley block are then removed sequentially. The same process is applied to the traction field side: the integrated tensioning machine is first activated to apply force to the traction system, and then the temporary devices are removed. This process ensures that the conductor always has at least one reliable system—either a temporary or permanent tensioning system—bearing force, achieving a seamless and safe switching.

[0022] As a preferred option, the tension field includes two 2×90kN tensioners, and the traction field includes four 2×50kN tensioning machines.

[0023] The conductor and ground wire replacement construction method of this invention replaces the "removal before placement" method with the "old-to-new" method, and designs special tools and optimizes the construction process. It successfully solves the industry problems of high risk, long cycle, high cost and strict site requirements of traditional methods in complex and large-span environments, and has outstanding substantive features and significant progress. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the first tension tower in a transmission line conductor and ground wire replacement construction method according to this embodiment.

[0025] Figure 2 This is a schematic diagram of the first tension tower in a transmission line conductor and ground wire replacement construction method according to this embodiment.

[0026] Figure 3 This is a schematic diagram of the first tension tower in a transmission line conductor and ground wire replacement construction method according to this embodiment.

[0027] Figure 4 This is a schematic diagram of the first tension tower in a transmission line conductor and ground wire replacement construction method according to this embodiment.

[0028] Figure 5 This is a schematic diagram of the second tension tower in a transmission line conductor and ground wire replacement construction method according to this embodiment.

[0029] Figure 6 This is a schematic diagram of the second tension tower in a transmission line conductor and ground wire replacement construction method according to this embodiment.

[0030] Figure 7 This is a schematic diagram of the second tension tower in a transmission line conductor and ground wire replacement construction method according to this embodiment. Detailed Implementation

[0031] To further understand the content of this invention, the invention will be described in detail with reference to the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0032] This embodiment provides a method for replacing conductors and ground wires in a transmission line. The section of the line where the conductors and ground wires are to be replaced includes multiple tension towers and at least two straight-line towers. The tension towers are located on both sides of the section, and the straight-line towers are located in the middle of the section. The steps include: Install a wire-laying pulley on the straight-line tower and move the old conductor from its original suspension position on the straight-line tower into the wire-laying pulley; Tension fields and traction fields are set up at both ends of the line segment. Then, on the first tension tower 100 on the tension field side and the second tension tower 500 on the traction field side of the line segment, the end of the old conductor is released from its original anchoring position. Then, traction pipe 310 or traction assembly is installed at the end of the old conductor. The end of the old conductor on the tension field side is connected to the new conductor 330 laid out by the tension machine 340 of the tension field through a connecting device; The old conductor is pulled by the traction equipment 630 in the traction field, so that the new conductor 330 is simultaneously deployed under the traction of the old conductor and the tensioning of the tensioner 340, so as to complete the replacement.

[0033] In this embodiment, the entire section of the line segment where the conductor and ground wire are replaced uses four tension towers and two straight-line crossing towers, for a total of six towers. The crossing adopts a tension-straight-straight-tension method, with a span of 1478m and a tension section length of 2416m.

[0034] This embodiment utilizes the old conductor to pull the new conductor in a one-to-one manner to complete the replacement of the old and new conductors, thereby avoiding the highest risk of the ropes falling to the ground during the removal of the old line and the initial deployment of the new line. It achieves the replacement of the conductor and ground wire without touching the ground throughout the entire process, which is especially suitable for large-span sections with complex underground environments and limited space. It can significantly reduce safety risks, shorten the construction period, and reduce external coordination and compensation costs.

[0035] In this embodiment, on the straight tower, the old conductor is removed from the suspension insulator string to which it is suspended; a bracket is installed at the original hanging point of the suspension insulator string, and a wire-laying pulley is suspended on the bracket; the old conductor is placed in the wire-laying pulley.

[0036] In this embodiment, the hanger is hung on the crossarm of the straight tower. The upper part of the hanger is provided with a connecting part, and the crossarm is provided with a hanging point for fixing the suspension insulator string. The connecting part is connected to the hanging point. The string-laying trolley is hung on the lower part of the hanger.

[0037] In this embodiment, at several straight towers in the middle section, without changing the spatial position of the old conductors, the old conductors that were originally fixed and suspended are directly placed in the string-laying pulleys. During the operation, a lifting tool is first used to temporarily support the weight of the old conductors, and the suspension insulator strings are safely removed. Then, a hanging bracket is installed at the original hanging point of the fixed suspension insulator strings. In this embodiment, single-wheel or three-wheel pulleys can be used to reduce the weight of the pulleys and facilitate on-site transportation and installation. Through analysis of the tower suspension strings, hanging points, and conductor envelope angle, the maximum vertical load of the conductor is calculated to be 4×33kN. Therefore, two sets of three-wheel pulleys are considered for each phase, and φ916 three-wheel string-laying pulleys are selected. The size and material of the hanging brackets are adapted to the weight of the pulleys and the distribution of hanging points.

[0038] The special bracket used in this construction method has bolt hole spacing on the upper connecting plate that perfectly matches the bolt hole spacing of the original insulator string hanging points on the crossarm of the straight tower. This allows the bracket to be installed directly and precisely on the same set of bolts, just like the original insulator string. The lower part of the bracket is designed for suspending the wire-laying pulley.

[0039] In this embodiment, as Figure 1 As shown, on the crossarm of the first tension tower 100 on the tension field side, a first wire clamp 120 is installed 30m away from the first tension clamp 110 of the old conductor to fix the old conductor; the first wire clamp 120 is connected to the crossarm of the first tension tower 100 by four sets of 8t pulley blocks 130; the ground winch connected to the pulley blocks 130 is started to tighten the pulley blocks 130 to loosen the first tension clamp 110; four sets of secondary insulators 00 are arranged to fix the old conductor to the tower body of the first tension tower 100; the first tension clamp 110 and the first tension insulator string 140 are removed.

[0040] In this embodiment, after the tension field is set up, the first wire clamp 120 is fixed at a distance of 30m from the first tension clamp 110. The first tension insulator string 140 is connected by four sets of 8t pulleys 130. The first tension insulator string is tightened by starting the ground winch, which loosens the first tension clamp 110. Then the first tension clamp 110 is removed, allowing the old conductor to hang to the ground. The first tension insulator string 140 is then removed by using a 12.5 steel wire rope through a turning pulley set on the tower.

[0041] The first pulley group of the second-to-last pulley is a four-wheel pulley group consisting of two fixed pulleys and two movable pulleys. The second pulley group consists of a φ22 Dyneema rope, a 10t shackle, and a 60kN special wire clamp, which is used to anchor the wire, prevent the first pulley group from failing, and ensure the safety of the entire construction process.

[0042] In this embodiment, as Figure 2 As shown, the first tension clamp 110 is cut and disconnected, and the first tension clamp 110 is removed from the old conductor; the traction tube 310 is crimped onto the end of the old conductor where the first tension clamp 110 was originally connected.

[0043] After the old conductor end and the discarded first tension clamp are brought to a safe area on the ground, the conductor is cut using hydraulic shears, and the old first tension clamp is removed. The exposed conductor end is carefully ground to remove burrs, and then a special traction tube 310 is crimped onto it using a hydraulic press, becoming the standard temporary end of the old conductor on the tension field side.

[0044] In this embodiment, as Figure 3 As shown, the traction tube 310 is connected to the new conductor 330 deployed by the tension machine 340 via a first rotary connector, a first traction rope 320 and a second rotary connector connected in sequence.

[0045] The first traction rope 320 is a φ18 traction rope approximately 5 meters long, serving as a buffer section. Both the first and second rotary connectors are 8t rotary connectors. The connection sequence is as follows: old wire traction tube, 8t rotary connector, 5m long φ18 traction rope, 8t rotary connector, new wire traction tube, and new wire (330).

[0046] In this embodiment, as Figure 6As shown, on the crossarm of the second tension tower 500 on the traction field side, a second wire clamp 520 is installed at a distance of 5m from the second tension clamp 510 of the old conductor to fix the old conductor; the second wire clamp 520 is connected to the crossarm of the second tension tower 500 by four sets of 8t two-way two-way second pulley blocks 530; the ground winch connected to the second pulley blocks 530 is started to tighten the second pulley blocks 530 to loosen the second tension clamp 510; four sets of second-level insulators 00 are arranged to fix the old conductor to the tower body of the second tension tower 500; the second tension clamp 510 and the second tension insulator string 540 are removed.

[0047] The safety logic for releasing the old conductor anchorage on the traction side is exactly the same as that on the tension side, both using a pulley block tension transfer mode plus two redundant protection mechanisms. The difference lies in the fact that the specific parameters may be slightly adjusted according to the site layout. After removing the second tension clamp and the second tension insulator string, the end of the old conductor is led to the ground for processing.

[0048] In this embodiment, as Figure 5 As shown, the second tension clamp 510 is cut and disconnected, and the second tension clamp 510 is removed from the old conductor; a traction assembly is connected to the end of the old conductor where the second tension clamp 510 was originally connected; wherein, the traction assembly from the end of the old conductor to the traction device 630 includes, in sequence: a single-headed mesh connector 610, a bending connector, and a second traction rope 620.

[0049] In this system, a single-headed mesh connector 610 is used to directly grip the end of the conductor, which is then connected to the second traction rope 620 via an anti-bending connector. The second traction rope 620 is a φ18 main traction rope. The traction equipment 630 in the traction field uses an integrated tensioning machine, with each integrated tensioning machine pulling one main traction rope. The roller structure of the integrated tensioning machine allows the conductor to pass directly through, thus achieving a direct and efficient connection between the old conductor and the traction power, eliminating the need for the complex rope-reversing device in front of the traditional traction machine.

[0050] In this embodiment, as Figure 4 and Figure 7 As shown, start the tension machine 340. After the tension machine 340 stretches the tension to the tension field and the force stabilizes, reverse the ground winch connected to the first pulley group 130 and remove the first pulley group 130. If the force is still stable at the tension field after removal, remove 4 sets of secondary protection 00. Start the traction device 630. After the traction device 630 pulls the tension to the traction field and the force stabilizes, reverse the ground winch connected to the second pulley group 530 and remove the second pulley group 530. If the force is still stable at the traction field after removal, remove 4 sets of secondary protection 00.

[0051] In the tension field, the tensioning machine is first activated to apply a small, stable tension to the conductor. After confirming the reliability of the force-bearing system, the temporary first pulley block and the second pulley block are then removed sequentially. The same process is applied to the traction field side: the integrated tensioning machine is first activated to apply force to the traction system, and then the temporary devices are removed. This process ensures that the conductor always has at least one reliable system—either a temporary or permanent tensioning system—bearing force, achieving a seamless and safe switching.

[0052] In this embodiment, the tension field includes two 2×90kN tension machines, and the traction field includes four 2×50kN tensioning machines.

[0053] The traction yard provides sufficient traction power by arranging multiple devices in parallel.

[0054] The conductor and ground wire replacement construction method in this embodiment replaces the "removal before placement" method with the "old-to-new" method, and has designed special tools and optimized the construction process. It successfully solves the industry problems of high risk, long cycle, high cost and strict site requirements of traditional methods in complex and large-span environments, and has outstanding substantive features and significant progress.

[0055] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

[0056] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A method for replacing conductors and ground wires in power transmission lines, characterized in that, The section of the line segment for replacing the conductor and ground wire includes multiple tension towers and at least two straight-line towers. The tension towers are located on both sides of the section, and the straight-line towers are located in the middle of the section. The steps include: Install a wire-laying pulley on the straight-line tower and move the old conductor from its original suspension position on the straight-line tower into the wire-laying pulley; Tension fields and traction fields are set up at both ends of the line segment. Then, the ends of the old conductors are released from their original anchoring positions on the first tension tower (100) on the tension field side and the second tension tower (500) on the traction field side of the line segment. Then, traction pipes (310) or traction components are installed at the ends of the old conductors. The tension field side end of the old conductor is connected to the new conductor (330) deployed by the tension machine (340) of the tension field through a connecting device; The old conductor is pulled by the traction equipment (630) in the traction field, so that the new conductor (330) is simultaneously deployed under the traction of the old conductor and the tensioning of the tension machine (340) to complete the replacement.

2. The method for replacing conductors and ground wires in transmission lines according to claim 1, wherein, The process of installing a wire-laying pulley on a straight-line tower and moving the old conductor from its original suspension position on the straight-line tower into the wire-laying pulley includes: On a straight-line tower, the old conductor is removed from the suspension insulator string to which it is suspended; At the original hanging point of the suspension insulator string, a hanging frame is installed, and a wire-laying pulley is suspended on the hanging frame; The old conductor is placed in the wire-laying pulley.

3. The method for replacing conductors and ground wires in transmission lines according to claim 2, wherein, The method of installing a bracket at the original hanging point of the suspension insulator string and suspending a wire-laying pulley on the bracket includes: The bracket is hung on the crossarm of the straight tower. The upper part of the bracket is provided with a connecting part, and the crossarm is provided with a hanging point for fixing the suspension insulator string. The connecting part is connected to the hanging point. The line-feeding pulley is hung on the lower part of the hanger.

4. The method for replacing conductors and ground wires in transmission lines according to claim 1, wherein, On the first tension tower (100) on the tension field side and the second tension tower (500) on the traction field side of the line segment, respectively, the end of the old conductor is released from its original anchoring position, including: On the crossarm of the first tension tower (100) on the tension field side, a first wire clamp (120) is installed 30m away from the first tension clamp (110) of the old conductor to fix the old conductor; The first wire clamp (120) is connected to the crossarm of the first tension tower (100) by four sets of 8t two-way two-way first pulley groups (130); Start the ground winch connected to the first pulley block (130) to tighten the first pulley block (130) and loosen the first tension clamp (110). Four sets of secondary protection (00) are set up to fix the old conductor to the tower body of the first tension tower (100) through the secondary protection (00); Remove the first tension clamp (110) and the first tension insulator string (140).

5. A method for replacing conductors and ground wires in transmission lines according to claim 4, wherein, The installation of a traction tube (310) or traction assembly at the end of the old conductor includes: Cut and disconnect the first tension clamp (110), and remove the first tension clamp (110) from the old conductor; The traction tube (310) is crimped to the end of the original connection of the first tension clamp (110) of the old conductor.

6. The construction method for replacing conductors and ground wires in centralized transmission lines according to claim 5, wherein, The process of connecting the tension field side end of the old conductor to the new conductor (330) deployed by the tension machine (340) of the tension field via a connecting device includes: The traction tube (310) is connected to the new conductor (330) deployed by the tension machine (340) via the first rotary connector, the first traction rope (320) and the second rotary connector connected in sequence.

7. A method for replacing conductors and ground wires in transmission lines according to claim 1, wherein, On the first tension tower (100) on the tension field side and the second tension tower (500) on the traction field side of the line segment, respectively, the end of the old conductor is released from its original anchoring position, including: On the crossarm of the second tension tower (500) on the traction field side, a second wire clamp (520) is installed 5m away from the second tension clamp (510) of the old conductor to fix the old conductor; The second cable clamp (520) is connected to the crossarm of the second tension tower (500) by four sets of 8t second pulley blocks (530); Start the ground winch connected to the second pulley block (530) to tighten the second pulley block (530) and loosen the second tension clamp (510). Four sets of secondary protection (00) are set up to fix the old conductor to the tower body of the second tension tower (500) through the secondary protection (00); Remove the second tension clamp (510) and the second tension insulator string (540).

8. A method for replacing conductors and ground wires in transmission lines according to claim 7, wherein, The installation of a traction tube (310) or traction assembly at the end of the old conductor includes: Cut and disconnect the second tension clamp (510), and remove the second tension clamp (510) from the old conductor; Connect the traction assembly to the original connection end of the second tension clamp (510) of the old conductor; The traction assembly, from the end of the old conductor to the traction device (630), includes, in sequence: a single-headed wire mesh connector (610), an anti-bending connector, and a second traction rope (620).

9. The construction method for replacing conductors and ground wires in centralized transmission lines according to claim 6 or 8, wherein, The method of using the traction equipment (630) in the traction field to traction the old conductor, so that the new conductor (330) is simultaneously deployed under the traction of the old conductor and the tensioning of the tensioner (340) to complete the replacement, includes: Start the tension machine (340). After the tension machine (340) is tensioned to the tension field and the force is stable, reverse the ground winch connected to the first pulley group (130) and remove the first pulley group (130). If the tension field remains stable after removal, remove 4 sets of secondary protection (00). Start the traction equipment (630). After the traction equipment (630) pulls the ground winch connected to the second pulley group (530) and stabilizes the force at the traction site, reverse the connection and remove the second pulley group (530). If the traction site remains stable after removal, remove 4 sets of secondary protection (00).

10. A method for replacing conductors and ground wires in transmission lines according to claim 1, wherein, The tension field includes two 2×90kN tensioners (340), and the traction field includes four 2×50kN tensioning machines.

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