Power maintenance ladder

Abstract

The electric power maintenance ladder comprises a hook, an insulating ladder is arranged at the lower end of the hook, a hand-cranked winch and a pulley block arranged up and down are arranged at the lower part of the insulating ladder, a pull rope is wound around the hand-cranked winch, a hook is arranged at the lower end of the pull rope, and the pulley block is composed of a pulley frame and two pulleys installed up and down on the flower wheel frame, and the lower end of the pull rope passes through the two pulleys. It has a short structure and light weight, and it saves time and effort to pull and hook; it reduces the swing amplitude, improves the stability of the operator during the maintenance process, and avoids falling; it extends the hooking distance, reduces the size of the induced current of the operator during the hooking process, and avoids the risk of electric shock; it can reduce the number of workers and is simple to operate.

Description

Technical Field

[0001] The invention relates to an electric power maintenance ladder. Background Art

[0002] In the maintenance work of 220kV transmission lines, entering the strong electric field is an important link for the normal conduct of live work. Since the height of the iron tower is 30 meters to 40 meters, the traditional way to enter the strong electric field is that the ground potential personnel first climb the iron tower to the crossbeam with a transfer rope, pull the soft ladder connected to the lower end of the transfer rope upward and hook it on the conductor, and then the equal potential personnel climb the soft ladder from the ground to the conductor to perform maintenance work. The soft ladder connected between the conductor and the ground is long and heavy, and it takes time and effort to pull and hook it; the soft ladder swings widely, and the equal potential personnel standing on the soft ladder find it difficult to maintain balance and are prone to falling; when the ground potential personnel hook the soft ladder, they are close to the conductor, and the iron tower is grounded, so a large induced current passes through the body of the ground potential personnel, and there is a risk of electric shock; more than two operators are required, the number of workers is large, and the operation is complicated. Summary of the invention

[0003] The present invention aims to solve the above technical problems and provides an electric maintenance ladder, which is short and light in structure, and can save time and effort in pulling and hooking; reduces the swing amplitude, improves the stability of workers in the maintenance process, and avoids falling; extends the hooking distance, reduces the induced current of workers in the hooking process, and avoids the risk of electric shock; can reduce the number of workers and is simple to operate;

[0004] The technical solution of the present invention is:

[0005] The electric power maintenance ladder includes a hook, and its special features are: an insulating ladder is arranged at the lower end of the hook, and a hand-cranked winch and a pulley group arranged up and down are arranged at the lower part of the insulating ladder. A pull rope is wound around the hand-cranked winch, and a hook is arranged at the lower end of the pull rope. The pulley group is composed of a pulley frame and two pulleys installed up and down on the flower wheel frame, and the lower end of the pull rope passes through between the two pulleys.

[0006] Further preferably, the insulating ladder is composed of a support rod vertically installed at the lower end of the hook and climbing rods installed on both sides of the support rod and arranged equidistantly up and down, and the climbing rods on the left and right sides are staggered; the structure is simple, light and easy to carry.

[0007] Further preferably, the support pole and the climbing pole are made of epoxy resin.

[0008] Further preferably, there are two hooks, which are respectively placed on the left and right sides of the insulating ladder.

[0009] It is further preferred that a connecting rod is provided between the two hooks to improve the structural stability of the hooks.

[0010] The beneficial effects of the present invention are:

[0011] 1. The insulating ladder is short and light in weight, and the operation of pulling it onto the tower and hooking it onto the conductor saves time and effort, and reduces the intensity of the work.

[0012] 2. Since the insulating ladder has a certain rigidity, the swing amplitude is small after the insulating ladder is hooked on the wire, which improves the stability of the workers during the maintenance process and avoids falling.

[0013] 3. Since a hand winch and pulley block are arranged up and down at the lower part of the insulating ladder, the lower end of the pull rope wrapped around the hand winch passes through the pulley block and is installed with a hook. The power maintenance ladder is lifted to 6 meters below the crossbeam of the tower using a transfer rope. The insulating ladder is lifted and the hook is hooked on the wire, which extends the hooking distance, reduces the size of the induced current of the operating personnel during the hooking process, and avoids the risk of electric shock.

[0014] 4. After hooking the insulating ladder to the conductor, hook the hook on the angle iron of the tower. The operator directly transfers to the insulating ladder and enters the electric field to carry out maintenance work. One person can complete the entire maintenance process, reducing the number of workers and simplifying the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 yes Figure 1 Left view of the middle hook;

[0017] In the figure: 1-support rod, 2-climbing rod, 3-hook, 4-connecting rod, 5-hand winch, 6-pull rope, 7-hook, 8-pulley frame, 9-pulley. DETAILED DESCRIPTION

[0018] like Figure 1 , Figure 2 As shown, the electric power maintenance ladder comprises an insulating ladder, which is composed of a support rod 1 made of epoxy resin and climbing rods 2 made of epoxy resin installed on both sides of the support rod 1 and arranged equidistantly up and down, and the climbing rods 2 on the left and right sides are arranged alternately; two hooks 3 symmetrically arranged on the left and right are installed at the upper end of the insulating ladder, a connecting rod 4 is installed between the two hooks 3, and a hand winch 5 and a pulley block arranged up and down are installed at the lower part of the insulating ladder, a pull rope 6 is wound around the hand winch 5, and a hook 7 is installed at the lower end of the pull rope 6, and the pulley block is composed of a pulley frame 8 and two pulleys 9 installed up and down on the pulley frame 8, and the lower end of the pull rope 6 passes between the two pulleys.

[0019] During maintenance operations, the power maintenance ladder is first tied and fixed with a transfer rope. The operator carries the other end of the transfer rope and climbs the tower to 6 meters below the crossbeam. Then the transfer rope is pulled to lift the power maintenance ladder to the operator. The insulating ladder is lifted to hook the hook 3 on the conductor and the hook 7 on the angle iron of the tower. The operator then transfers to the insulating ladder and turns the hand winch 5 to release the pull wire, so that the insulating ladder is vertically aligned and keeps a safe distance from the tower. Finally, the operator climbs the insulating ladder into the strong electric field to start maintenance operations.

[0020] After the maintenance work is completed, the above operation process is reversed and the operator returns to the ground to complete the operation.

[0021] The above are only specific embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for using an electric maintenance ladder, including a hook, characterized in that: An insulating ladder is arranged at the lower end of the hook, and the insulating ladder is composed of a support rod vertically installed at the lower end of the hook and climbing rods installed on both sides of the support rod and arranged equidistantly up and down, and the climbing rods on the left and right sides are arranged alternately, and a hand-cranked winch and a pulley block arranged up and down are arranged at the lower part of the insulating ladder, a pull rope is wound around the hand-cranked winch, and a hook is arranged at the lower end of the pull rope, and the pulley block is composed of a pulley frame and two pulleys installed up and down on the flower wheel frame, and the lower end of the pull rope passes through between the two pulleys; during maintenance operation, the power maintenance ladder is first tied and fixed with a transfer rope, and the operator carries the other end of the transfer rope to climb the iron tower to 6 meters below the crossbeam, and then pulls the transfer rope to lift the power maintenance ladder to the operator, lifts the insulating ladder to hang the hook on the wire, and hangs the hook on the angle iron of the iron tower, and the operator then transfers to the insulating ladder, turns the hand-cranked winch to release the pull wire, so that the insulating ladder is vertically aligned and keeps a safe distance from the iron tower, and finally the operator climbs the insulating ladder into the strong electric field to start maintenance work.

2. The method for using the electric power maintenance ladder according to claim 1, characterized in that: The support rod and the climbing rod are made of epoxy resin material.

3. The method for using the electric power maintenance ladder according to claim 1, characterized in that: There are two hooks, which are respectively arranged on the left and right sides of the insulating ladder.

4. The method for using the electric power maintenance ladder according to claim 3 is characterized by: A connecting rod is arranged between the two hooks.

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