CN110374489B

CN110374489B - Power maintenance ladder

Info

Publication number: CN110374489B
Application number: CN201910704145.2A
Authority: CN
Inventors: 卜洪亮; 叶青; 李希尧; 史启光; 张萌; 王倚恒; 白昀
Original assignee: Fuxin Power Supply Co of State Grid Liaoning Electric Power Co Ltd; State Grid Corp of China SGCC
Current assignee: Fuxin Power Supply Co of State Grid Liaoning Electric Power Co Ltd; State Grid Corp of China SGCC
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2025-02-07
Anticipated expiration: 2039-07-31
Also published as: CN110374489A

Abstract

The utility model provides an electric power overhauls cat ladder, includes the lifting hook, sets up insulating ladder in the lifting hook lower extreme, sets up hand winch and the assembly pulley of arranging from top to bottom in insulating ladder lower part, winds on the hand winch has the stay cord, and the stay cord lower extreme sets up the couple, the assembly pulley comprises pulley yoke and two pulleys of installing on the flower wheel frame from top to bottom, the stay cord lower extreme passes between two pulleys. The electric shock device has the advantages of short structure, light weight, time and labor saving in pulling and hooking, reduction of swing amplitude, improvement of stability of operators in the overhaul process, avoidance of falling phenomenon, prolongation of hooking distance, reduction of the magnitude of induced current of the operators in the hooking process, avoidance of electric shock danger, reduction of labor amount and simplicity in operation.

Description

Electric power overhauls cat ladder

Technical Field

The invention relates to an electric power overhaul crawling ladder.

Background

In the maintenance operation of 220kV transmission lines, entering a strong electric field is an important link for the normal development of live working. Because the height of the iron tower is 30-40 m, the traditional mode of entering a strong electric field is that ground potential personnel carry the transmission rope to climb the iron tower to the cross arm, the rope ladder connected to the lower end of the transmission rope is pulled upwards and hooked on a wire, and the equipotential personnel climb the rope ladder to the wire from the ground to carry out maintenance operation. The rope ladder connected between the wire and the ground is long, heavy, time and labor are wasted in pulling and hooking, the swing amplitude of the rope ladder is large, equipotential personnel standing on the rope ladder are difficult to master balance and easy to fall, the ground potential personnel are close to the wire when hooked on the rope ladder, the iron tower is grounded, large induction current passes through the body of the ground potential personnel, electric shock danger exists, more than two operators are needed, the labor is increased, and the operation is complex.

Disclosure of Invention

The invention aims to solve the technical problems and provides an electric power overhaul cat ladder which has the advantages of short structure, light weight, time and labor saving for pulling and hooking, reduced swing amplitude, improved stability of operators in the overhaul process, avoiding falling phenomenon, prolonged hooking distance, reduced induction current of the operators in the hooking process, avoiding electric shock hazard, reduced labor amount and simple operation;

The technical scheme of the invention is as follows:

the electric power overhaul crawling ladder comprises a lifting hook and is characterized in that an insulating ladder is arranged at the lower end of the lifting hook, a hand winch and a pulley block which are arranged up and down are arranged at the lower part of the insulating ladder, a pull rope is wound on the hand winch, a hook is arranged at the lower end of the pull rope, the pulley block is composed of a pulley frame and two pulleys which are arranged on the pulley frame up and down, and the lower end of the pull rope passes through the space between the two pulleys.

Further preferably, the insulating ladder is composed of a supporting rod vertically arranged at the lower end of the lifting hook and climbing rods which are arranged at two sides of the supporting rod in an up-down equidistant mode, wherein the climbing rods at the left side and the right side are arranged in a staggered mode, and the insulating ladder is simple in structure, light and convenient to carry.

Further preferably, the support bar and the climbing bar are made of epoxy resin material.

Further preferably, the number of the lifting hooks is two, and the two lifting hooks are respectively arranged at the left side and the right side of the insulating ladder.

Further preferably, a connecting rod is arranged between the two lifting hooks, so that the structural stability of the lifting hooks is improved.

The beneficial effects of the invention are as follows:

1. The insulating ladder structure is short, small and light, and the operation of pulling the insulating ladder to the iron tower and hooking the guide wire is time-saving and labor-saving, so that the operation intensity is reduced.

2. Because the insulating ladder has certain rigidity, the swing amplitude is small after the insulating ladder hooks the wires, the stability of operators in the overhaul process is improved, and the falling phenomenon is avoided.

3. Because hand winch and assembly pulley that arrange from top to bottom are set up in insulating ladder lower part, pass and install the couple through the assembly pulley around the stay cord lower extreme on hand winch, use the transmission rope to promote this electric power maintenance cat ladder to 6 meters departments below the cross arm of iron tower, lift insulating ladder with the hook on the wire, prolonged the hook distance, reduced the in-process operating personnel induced current size of hook, avoided the dangerous emergence of electric shock.

4. After the insulated ladder hook is hung with a wire, the hook is hung on angle irons of the iron tower, an operator directly transfers to the insulated ladder and enters an electric field to carry out maintenance operation, one person can complete all maintenance operation processes, labor quantity is reduced, and operation is simple.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a left side view of the hook of FIG. 1;

In the figure, the device comprises a 1-supporting rod, a 2-climbing rod, a 3-lifting hook, a 4-connecting rod, a 5-hand winch, a 6-stay cord, a 7-hook, an 8-pulley yoke and a 9-pulley.

Detailed Description

As shown in figures 1 and 2, the electric power overhaul crawling ladder comprises an insulating ladder, wherein the insulating ladder is composed of support rods 1 made of epoxy resin and climbing rods 2 made of epoxy resin, the climbing rods 2 are arranged on two sides of the support rods 1 in an up-down equidistant mode, the climbing rods 2 on the left side and the right side are arranged in a staggered mode, two lifting hooks 3 which are arranged in a left-right symmetrical mode are arranged at the upper end of the insulating ladder, a connecting rod 4 is arranged between the two lifting hooks 3, a hand winch 5 and a pulley block which are arranged up-down are arranged at the lower portion of the insulating ladder, a pull rope 6 is wound on the hand winch 5, a hook 7 is arranged at the lower end of the pull rope 6, the pulley block is composed of a pulley frame 8 and two pulleys 9 which are arranged on the pulley frame 8 up-down, and the lower end of the pull rope 6 passes through the space between the two pulleys.

During maintenance operation, the electric power overhaul cat ladder is tied and fixed by using the transmission rope, an operator carries the other end of the transmission rope to climb the iron tower to a position 6 meters below the cross arm, then pulls the transmission rope to lift the electric power overhaul cat ladder to the operator, lifts the insulating ladder to hook the lifting hook 3 on the guide wire, hooks the hook 7 on angle irons of the iron tower, the operator transfers the electric power overhaul cat ladder to the insulating ladder again, rotates the hand winch 5 to release the pull wire, enables the insulating ladder to vertically swing and keep a safe distance with the iron tower, and finally the operator climbs the insulating ladder to enter a strong electric field to start maintenance operation.

After the maintenance operation is finished, the operation process is reversed, and the operator returns to the ground to finish the operation.

The above is only a specific embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The method for using the electric power overhaul cat ladder is characterized in that an insulating ladder is arranged at the lower end of the lifting hook, the insulating ladder is composed of supporting rods vertically arranged at the lower end of the lifting hook and climbing rods which are arranged at two sides of the supporting rods and are arranged at equal intervals up and down, the climbing rods at the left side and the right side are arranged in a staggered mode, hand winches and pulley blocks which are arranged up and down are arranged at the lower portion of the insulating ladder, pull ropes are wound on the hand winches, hooks are arranged at the lower end of the pull ropes, the pulley blocks are composed of pulley frames and two pulleys which are arranged on the pulley frames up and down, the lower ends of the pull ropes pass through between the pulleys, during maintenance operation, firstly, a transmission rope is used for fixing the electric power overhaul cat ladder in a binding mode, then the electric power overhaul cat ladder is lifted to the position of an operator by pulling the transmission rope, the lifting the insulating ladder is hooked on a wire, the hooks are hooked on angle irons of the iron towers, the operators are transferred to the insulating cat ladder again, the hand winches are rotated, the pull ropes are released, the insulating vertical ladder keeps a safe distance from the pulley frames, and finally, the operator can enter an electric field to start to maintain an electric field.

2. The method of claim 1, wherein the support bar and the climbing bar are made of epoxy resin.

3. The method of claim 1, wherein the number of hooks is two, and the two hooks are respectively arranged at the left side and the right side of the insulating ladder.

4. The method of claim 3, wherein a connecting rod is disposed between the two hooks.