CN101908739A - Pulley for maintenance of overhead power transmission lines - Google Patents

Abstract

The present invention is a trolley for overhauling electric power transmission line, which is characterized in that it includes a frame, on the upper part of the frame there is a hanging wire pulley which rotates at a fixed axis, on the frame there is an inlet under the side of the wire pulling pulley, on the frame The lower part is equipped with a coaxial and fixed axis rotation ladder head traction pulley and a backup protection rope pulley, and a control rod is hinged on the top of the frame; a damping rope slowing device is provided at the lower end of the control rod, and the structure of the damping rope slowing device is composed of: The support fixed to the lower end of the control rod is provided with a fixed clamp block and an opposite movable clamp block in the support, and the screw rod fixedly connected to the movable clamp block is connected with the nut of the support. It has the advantages of simple structure, easy operation, safe and reliable use, saving personnel and time, can work with live electricity, and high operating efficiency.

Description

Pulley for maintenance of overhead power transmission lines

technical field

The invention relates to an appliance for overhauling an overhead electric power transmission line, in particular to a trolley for overhauling an overhead electric power transmission line.

Background technique

In the daily power maintenance work, because the conductor and ground wire of the overhead transmission line are bare wires and are located outdoors, they are easily damaged by various external forces, such as: wind, lightning strikes, ice coating, kites, wild bird activities, etc. Defects such as broken strands and anti-vibration hammer falling off occur. To deal with the above defects, we need to go to the running guide and ground to do the work. The prior art usually adopts two methods of outlet.

1. Speeding out of the line: First, the line is powered off. At least 6 operators are required to arrive at the operation site, including 2 operators on the tower and 4 on the ground. The operators on the tower take the transfer rope to the tower, and hang the transfer rope on the appropriate position of the iron tower; The infinite rope is tied to the appropriate position of the ladder head to ensure that the ladder head can be correctly pulled when the outgoing personnel return to the iron tower. On the wire, the two endless ropes towed are handed over to the tower and the ground cooperating personnel respectively. The outgoing personnel enter the ladder head, and then the ground personnel are pulled down to the operation point for operation. After the operation is completed, they are pulled back to the tower and ground personnel. on the tower. This method of operation needs power outage operation, more manpower and material resources are invested, and the path to the operation point is longer, wasting a lot of operation time, and the loss caused by power outage is large.

2. Soft ladder outlet method: suitable for power failure and electrification of the line. 6 workers are required. One worker goes up the tower with a transfer rope, and tie the insulating rope block to the overhead ground wire that needs to be processed; the ground staff hangs the soft ladder head on the wire to be processed through the transfer rope; Fixed work to ensure the stability of the soft ladder during the operation of the outgoing personnel. After the preparations are completed, the outgoing operators enter the operating point along the soft ladder to carry out operations. This method of operation sometimes requires more operators than the flying car, and the operators do not have reliable backup protection during the process of exiting the line, so there is a high potential safety hazard.

Contents of the invention

The object of the present invention is to provide a trolley for overhauling electric power transmission lines with simple structure, easy operation, safe and reliable use, saving manpower and time, capable of live work and high working efficiency.

The purpose of the present invention is achieved by the following technical solutions: a trolley for overhauling electric power transmission lines, characterized in that it includes a frame, on the upper part of the frame there is a hanging wire pulley that rotates with a fixed axis, and on the frame is located The lower part of the pulley side is provided with an inlet, and a ladder head traction pulley and a backup protection rope pulley are arranged at the lower part of the frame, and a control rod is hinged at the top of the frame.

A damping rope slowing device is provided at the lower end of the control rod. The structure of the damping rope slowing device is to include a support fixedly connected to the lower end of the control rod, and a fixed clamp block and an opposite movable clamp block are arranged in the support , the screw rod fixedly connected to the movable clamp block is connected with the nut of the support.

The trolley for overhead power transmission line inspection and maintenance of the present invention is equipped with a wire pulley rotating at a fixed axis on the upper part of the frame, and an inlet is provided on the frame below the side of the wire pulley. Passing the overhead transmission line above the operation point, the traction rope is wound on the top of the hanging pulley for manual traction, and there is an inlet under the side of the hanging pulley to hang the hanging pulley on the overhead transmission line; The ladder head traction pulley and the backup protection rope pulley rotating on the coaxial fixed axis, the ladder head of the walking ladder for the outgoing personnel and the backup protection rope for protecting the outgoing personnel are respectively pulled by the ladder head traction pulley and the backup protection rope pulley; The control rod is hinged, and the hanging pulley can be hung on the overhead transmission line and taken off from the overhead transmission line through the change of the angle between the control rod and the frame; Lifting traction speed control.

Compared with the prior art, when using the trolley for the maintenance of overhead power transmission lines of the present invention, the number of operators is reduced from at least 6 to 4 to complete the operation; the operation time is reduced from the original average operation time of 2 hours to the present 40 minutes; and it can be applied to the live operation of the vertically arranged lower conductors and middle conductors, which can reduce power outage time and efficiency for power supply companies, and improve power supply reliability; reduce the operation of operators on the tower and on the tower, greatly It reduces the labor intensity of operators; the ladder is easy to get on the line, and the people who go out of the line are protected by a backup protection rope; it has the advantages of simple structure, easy operation, safe and reliable use, saving personnel and time, can work with electricity, and has high operating efficiency.

Description of drawings

Fig. 1 is a schematic front view of the structure of a pulley for maintenance of overhead power transmission lines.

FIG. 2 is a schematic left view of FIG. 1 .

Fig. 3 is a sectional view of A-A in Fig. 1 .

In the figure: 1 frame, 2 control rod, 3 damping rope slowing device, 4 support, 5 nut, 6 fixed clamp block, 7 movable clamp block, 8 screw rod, 9 hanging wire pulley, 10 ladder head traction pulley, 11 backup protection Rope pulley, 12 inlets.

Detailed ways

The present invention will be further described below using the accompanying drawings and examples.

The trolley for maintenance of overhead power transmission lines of the present invention comprises a frame 1, on which a hanging wire pulley 9 rotating with a fixed axis is arranged on the upper part of the frame 1, and an inlet 12 is arranged below the side of the hanging wire pulley 9 on the frame 1, and an inlet 12 is arranged on the lower part of the frame 1. A ladder head traction pulley 10 and a backup protection rope pulley 11 rotating coaxially with a fixed axis are arranged, and a control rod 2 is hinged on the top of the frame 1 . A damping rope slowing device 3 is provided at the lower end of the control rod 2, and the structure of the damping rope slowing device 3 includes a support 4 fixedly connected to the lower end of the control rod 2, and a fixed clip 6 is arranged in the support 4 With the opposite movable clamp block 7, the screw rod 8 fixedly connected to the movable clamp block 7 is connected with the nut 5 of the support 4.

When using the tackle of the present invention for overhauling electric power transmission lines: the operator wraps the traction rope on the trolley hanging pulley 9 for overhauling electric power transmission lines, and the ladder head traction rope and the backup protection rope are respectively wound around the ladder head traction pulley 10. On the back-up protection rope pulley 11; the traction rope is fixed on the overhead power transmission line above the operation point in the way of throwing heavy objects, and the traction rope is manually drawn and passed through the introduction port 12 provided at the bottom of the suspension pulley 9 sides to make the suspension pulley 9 hang on the overhead transmission line; the ground personnel pull the ladder head traction rope to guide the traction through the ladder head traction pulley 10, and hang the ladder head on the overhead transmission line that needs to be processed; the outgoing workers wear labor protection equipment and fasten the backup protection With the help of ground operators, they enter the operating point along the ladder; after the operation is completed, the operators return to the ground along the ladder; the ground personnel pass the ladder head to the ground through the ladder head traction rope; Change to realize that the hanging wire pulley 9 is hung on the overhead transmission line and takes off from the overhead transmission line.

Claims (2)

1. A trolley for overhauling electric power transmission lines is characterized in that: it comprises a frame, a hanging wire pulley with fixed axis rotation is arranged on the upper part of the frame, an inlet is provided on the frame below the side of the hanging wire pulley, and an inlet is provided at the lower part of the frame It is equipped with a coaxial and fixed axis rotation ladder head traction pulley and a backup protection rope pulley, and a control rod is hinged on the top of the frame. 2. The trolley for maintenance of overhead power transmission lines according to claim 1, characterized in that: a damping rope slowing device is provided at the lower end of the control rod, and the structure of the damping rope slowing device is that it is connected with the lower end of the control rod For the fixed support, a fixed clamp block and an opposite movable clamp block are arranged in the support, and the fixed screw rod of the movable clamp block is connected with the nut of the support.

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