Insulation folding ladder for live working of 500 kilovolt power transmission line

Abstract

The invention relates to an insulating folding ladder for 500kV power transmission line hot-line work. A cross arm fixing hook and an insulating vertical ladder are fixedly connected through a fixing cotter pin and a nut and are used for fixing the folding ladder on a cross arm side; a metal ring is arranged on the cross arm fixing hook and is bound and reinforced by an insulating rope; an insulating pulley is arranged above the insulating vertical ladder and is matched with an insulating rope to realize folding; one side of the horizontal ladder adjusting plate is fixed with the insulating vertical ladder through a bolt, the other side of the horizontal ladder adjusting plate is fixed with the insulating horizontal ladder through a bolt, and a wire hanging hook is fixedly mounted in the middle of the front end of the insulating horizontal ladder and is provided with a wire hanging hook limiting rope. According to the invention, the stability of the ladder and the safety of equipotential personnel are ensured to the greatest extent, the gravity of a human body on a wire is reduced, a supporting platform is provided for the human body during operation, the universality is high, and the device can be suitable for cross arms of any tension tower type of a 500kV power transmission line; meanwhile, a split type structure is adopted, transportation, assembly and operation are convenient, firmness and reliability are achieved, single-person operation on a tower can be achieved, the operation time is shortened, and the overhaul efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of live-line working equipment for power transmission lines, specifically relating to an insulated folding ladder for live-line working on 500 kV power transmission lines. Background Technology

[0002] In 500 kV lines, defects such as broken conductor strands or damaged spacers sometimes occur at the jumper points of tension towers, thus requiring live equipotential bonding treatment. However, 500 kV tension towers are large in size, and if the horizontal ladder method is used for equipotential bonding, the required insulated horizontal ladder is too long, which is inconvenient for transportation, and the excessive stress on the middle section of the horizontal ladder during the personnel equipotential bonding process can easily cause safety hazards. If the short ladder method is used for equipotential bonding, the operator needs to sit on the jumper after entering the equipotential bonding process, which affects the stress on the jumper section. If there are broken conductor strands, it can easily cause personal injury. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an insulated folding ladder for live-line work on 500 kV transmission lines.

[0004] The technical problem solved by this invention is achieved through the following technical solution: An insulated folding ladder for live-line work on 500 kV transmission lines includes a crossarm fixing hook, an insulated vertical ladder, an insulated horizontal ladder, a horizontal ladder adjusting plate, a hanging hook, and a hanging hook limiting rope. The crossarm fixing hook is fixedly connected to the insulated vertical ladder by fixing pins and nuts for fixing the folding ladder on the crossarm side. The crossarm fixing hook is provided with two metal rings and is reinforced by binding with an insulated rope. Two insulated vertical ladders are arranged in parallel and spaced apart. An insulated pulley is provided on the top of the insulated vertical ladder and folds with the insulated rope. The horizontal ladder adjusting plate is L-shaped and is fixed to the insulated vertical ladder on one side by bolts and to the insulated horizontal ladder on the other side by bolts. The horizontal ladder adjusting plate can realize the rotation and folding of the insulated horizontal ladder while fixing it. The hanging hook is fixedly installed in the middle of the front end of the insulated horizontal ladder, and the hanging hook is provided with a hanging hook limiting rope.

[0005] Furthermore, the insulated ladder is provided with several through holes, and the crossbeam fixing hook is inserted into the several through holes by fixing pins to adjust the service length of the insulated ladder.

[0006] Furthermore, one side of the flat ladder adjustment plate is fixed to the insulated vertical ladder by two sets of bolts, and the other side is fixed to the insulated flat ladder by one set of bolts.

[0007] Moreover, the crossbeam fixing hook is made of aluminum alloy.

[0008] Furthermore, when using the insulated folding ladder, two sections of insulated vertical ladder are assembled on the ground and connected to the insulated horizontal ladder via the horizontal ladder adjustment plate. The insulated rope passes through the insulated pulley on the insulated vertical ladder and is fixed to the hanging hook. After tightening the insulated rope to fold and fix the ladder, it is passed up the tower. When it is passed to the crossarm, the crossarm fixing hook is hooked onto the tower material and tied with the insulated rope to complete the fixation. The insulated rope in the insulated pulley is loosened to unfold the folding ladder, the hanging hook is hooked onto the wire, and the hanging hook limit rope is tied to the crossarm to complete the fixation. The equipotential personnel move along the folding ladder to enter the equipotential zone.

[0009] The advantages and beneficial effects of this invention are as follows: 1. The crossarm fixing hook and the line hook limiting rope of the present invention are fixed on the crossarm. With the limiting effect of the line itself, the stability of the ladder and the safety of personnel at the same potential are guaranteed to the greatest extent. It also reduces the weight of the line on the human body and provides a support platform for the human body during operation.

[0010] 2. The foldable design of this invention ensures that the center of gravity remains stable and reduces swaying during the transfer process.

[0011] 3. This invention is highly versatile, with adjustable length for both horizontal and vertical use, and can be applied to crossarms of any tension tower type in 500kV transmission lines.

[0012] 4. This invention adopts a split structure, which is convenient for transportation, easy to assemble, convenient to operate, sturdy and reliable. It can be operated by a single person on the tower, reducing working time and improving maintenance efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Side view.

[0014] Explanation of reference numerals in the attached figures 1-Crossarm fixing hook, 2-Through hole, 3-Insulated vertical ladder, 4-Horizontal ladder adjusting plate, 5-Insulated horizontal ladder, 6-Hanging hook limiting rope, 7-Hanging hook, 8-Insulated pulley. Detailed Implementation

[0015] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0016] like Figure 1 , 2As shown, an insulated folding ladder for live-line work on 500 kV transmission lines is innovative in that it includes a crossarm fixing hook 1, an insulated vertical ladder 3, an insulated horizontal ladder 5, a horizontal ladder adjusting plate 4, a wire hook 7, and a wire hook limiting rope 6. The crossarm fixing hook is fixedly connected to the insulated vertical ladder by fixing nails and nuts to fix the folding ladder on the crossarm side. The crossarm fixing hook is provided with two metal rings and is reinforced by binding with an insulated rope. Two insulated vertical ladders are arranged in parallel and spaced apart. An insulated pulley 8 is provided on the top of the insulated vertical ladder and is used with an insulated rope to achieve folding. The horizontal ladder adjusting plate is L-shaped and is fixed to the insulated vertical ladder on one side by bolts and to the insulated horizontal ladder on the other side by bolts. The horizontal ladder adjusting plate can realize the rotation and folding of the insulated horizontal ladder while fixing it. The wire hook is fixedly installed in the middle of the front end of the insulated horizontal ladder, and the wire hook is provided with a wire hook limiting rope.

[0017] The insulated ladder is provided with several through holes, and the crossbeam fixing hook is inserted into the several through holes by fixing pins to adjust the length of the insulated ladder.

[0018] One side of the flat ladder adjustment plate is fixed to the insulated vertical ladder by two sets of bolts, and the other side is fixed to the insulated flat ladder by one set of bolts.

[0019] The crossbeam fixing hook is made of aluminum alloy.

[0020] The working principle of this invention is as follows: When using the insulated folding ladder, two sections of insulated vertical ladder are assembled on the ground and connected to the insulated horizontal ladder via the horizontal ladder adjustment plate. The insulated rope passes through the insulated pulley on the insulated vertical ladder and is fixed to the hanging hook. After tightening the insulated rope to fold and fix the ladder, it is passed up the tower. When it is passed to the crossarm, the crossarm fixing hook is hooked onto the tower material and tied with the insulated rope to complete the fixation. The insulated rope in the insulated pulley is loosened to unfold the folding ladder. The hanging hook is hooked onto the wire and the hanging hook limit rope is tied to the crossarm to complete the fixation. The equipotential personnel move along the folding ladder to enter the equipotential zone.

[0021] The advantages and beneficial effects of this invention are as follows: 1. The crossarm fixing hook and the line hook limiting rope of the present invention are fixed on the crossarm. With the limiting effect of the line itself, the stability of the ladder and the safety of personnel at the same potential are guaranteed to the greatest extent. It also reduces the weight of the line on the human body and provides a support platform for the human body during operation.

[0022] 2. The foldable design of this invention ensures that the center of gravity remains stable and reduces swaying during the transfer process.

[0023] 3. This invention is highly versatile, with adjustable length for both horizontal and vertical use, and can be applied to crossarms of any tension tower type in 500kV transmission lines.

[0024] 4. This invention adopts a split structure, which is convenient for transportation, easy to assemble, convenient to operate, sturdy and reliable. It can be operated by a single person on the tower, reducing working time and improving maintenance efficiency.

[0025] This invention serves as an important insulated tool for handling jumper defects on energized 500 kV transmission lines, ensuring the safe and economical operation of the 500 kV power grid and improving maintenance efficiency. The invention comprises six parts: a crossarm fixing hook, an insulated vertical ladder (two sections), an insulated horizontal ladder, a horizontal ladder adjustment plate, a wire hook, and a wire hook limiting rope.

[0026] This invention can be matched with crossarms and jumpers of various tension tower types on 500 kV transmission line towers. The entire insulated folding ladder is fixed to the crossarm angle iron via a crossarm fixing hook. By adjusting the position of the adjusting bolts on the ladder's adjusting plate, the insulated ladder is adjusted to a position where the hook can reach the conductor. The hook's limiting rope reduces the stress on the conductor. After descending the insulated ladder onto the insulated horizontal ladder, the equipotential worker enters the equipotential position along the ladder. This invention, with its crossarm fixing hook and hook limiting rope fixed to the crossarm, combined with the conductor's own limiting effect, maximizes ladder stability and the safety of the equipotential worker, while reducing the weight of the worker on the conductor and providing a support platform for the worker during operation. The insulated folding ladder for 500 kV transmission line live-line work fills a gap in insulated tools for 500 kV live-line work and innovates a new method of potential entry, bringing more possibilities for enhancing live-line work capabilities and expanding the application scope of live-line work.

[0027] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. An insulated folding ladder for live-line work on 500 kV transmission lines, characterized in that: The system includes a crossarm fixing hook, an insulated vertical ladder, an insulated horizontal ladder, a horizontal ladder adjusting plate, a hanging hook, and a hanging hook limiting rope. The crossarm fixing hook is fixedly connected to the insulated vertical ladder by fixing nails and nuts for fixing the folding ladder on the crossarm side. The crossarm fixing hook is equipped with two metal rings and is reinforced by binding with an insulated rope. Two insulated vertical ladders are arranged parallel and spaced apart. An insulated pulley is provided on the top of the insulated vertical ladder, which, together with the insulated rope, enables folding. The horizontal ladder adjusting plate is L-shaped and is fixed to the insulated vertical ladder on one side by bolts and to the insulated horizontal ladder on the other side by bolts. The horizontal ladder adjusting plate can realize the rotation and folding of the insulated horizontal ladder while fixing it. The hanging hook is fixedly installed in the middle of the front end of the insulated horizontal ladder, and the hanging hook is equipped with a hanging hook limiting rope.

2. The insulated folding ladder for live-line work on 500 kV transmission lines according to claim 1, characterized in that: The insulated ladder is provided with several through holes, and the crossbeam fixing hook is inserted into the several through holes by fixing pins to adjust the length of the insulated ladder.

3. The insulated folding ladder for live-line work on 500 kV transmission lines according to claim 1, characterized in that: One side of the flat ladder adjustment plate is fixed to the insulated vertical ladder by two sets of bolts, and the other side is fixed to the insulated flat ladder by one set of bolts.

4. The insulated folding ladder for live-line work on 500 kV transmission lines according to claim 1, characterized in that: The crossbeam fixing hook is made of aluminum alloy.

5. The insulated folding ladder for live-line work on 500 kV transmission lines according to claim 1, characterized in that: When using the insulated folding ladder, two sections of insulated vertical ladder are assembled on the ground and connected to the insulated horizontal ladder via the horizontal ladder adjustment plate. The insulated rope passes through the insulated pulley on the insulated vertical ladder and is fixed to the hanging hook. After tightening the insulated rope to fold and fix the ladder, it is passed up the tower. When it is passed to the crossarm, the crossarm fixing hook is hooked onto the tower material and tied with the insulated rope to complete the fixation. The insulated rope in the insulated pulley is loosened to unfold the folding ladder. The hanging hook is hooked onto the wire and the hanging hook limit rope is tied to the crossarm to complete the fixation. The equipotential personnel move along the folding ladder to enter the equipotential zone.

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