CN105576555A - A special tool for replacing 220kV spacer rods when power is off or live - Google Patents

Abstract

A special tool for replacing a 220kV spacer in power failure or electrification is characterized by comprising an upper hook and a lower hook, wherein the upper hook and the lower hook are respectively in threaded fit connection through a labor-saving lead screw; the hook end parts of the upper hook and the lower hook are respectively connected with a triggering type locking hook, and after the triggering device is triggered, the locking device locks the triggering type locking hook to enable the upper hook and the lower hook to be respectively closed with the triggering type locking hook to form a circular structure; the pulley is fixedly connected to one side of the upper hook, the insulating operating rod connecting piece is fixedly connected to one side of the lower hook, and the screw rod is fixed through the screw rod locking device. The invention has the beneficial effects that: the problems of complex steps, long operation time, high working strength, high operation risk and the like of the conventional spacer replacing operation method can be solved, the working efficiency is greatly improved, the working safety of maintainers is enhanced, and the maintenance operation of replacing the 220kV spacer in a power failure or electrified mode is more standardized and normalized.

Description

A special tool for replacing 220kV spacer rods when power is off or live

technical field

The invention belongs to the electric power industry, and belongs to the technical field of a special tool for replacing 220kV spacer rods during power failure or live charging.

Background technique

On high-voltage transmission lines, in order to reduce wire corona discharge and interference to communication, split wires are generally used. At present, the 220kV transmission line uses double-split conductors. In order to ensure that the distance between the double-split wire harnesses remains unchanged to meet the electrical performance, reduce the surface potential gradient, and in the case of a short circuit, the electromagnetic force will not be generated between the wire harnesses, causing mutual attraction and collision, or even causing an instantaneous attraction collision, but the accident is eliminated. After that, it can return to the normal state, so spacers are installed at a certain distance in the span. The design spacing of the double-split conductors is 0.4m, that is, the installation length of the spacer is also 0.4m.

The spacer rods on the double-split conductors will loosen, be damaged and other defects that threaten the safe operation of the line because the bolts are not fastened in place during the original installation or are affected by conductor vibration for a long time during operation. If it is not handled in time, the long-term wear and tear of the spacer will cause major accidents such as broken wires and inverted rods. Installation and replacement of spacer rods during power outage or live has become a routine work of transmission line maintenance.

When replacing or installing a new spacer with electricity, the soft ladder operation method is adopted. The soft ladder is suspended on a sub-conductor. When the operator reaches the equipotential installation position by climbing the soft ladder, the weight of the soft ladder will make the two sub-conductors pull up and down for a larger distance. If the distance between the two sub-conductors cannot be kept at 0.4m, the operator will not be able to replace and install new spacers. The method used in the past is to throw the insulating wire rope. The personnel on the wire throw the insulating wire rope over the sub-conductor at a high place. After pulling the distance between the two sub-conductors to approximately 0.4m, they are bound and fixed with the insulating wire rope. The disadvantages of this method are obvious: 1. There is a large uncertainty, the success rate of throwing the insulating wire rope is low, and it is more difficult to complete in windy weather; 2. It takes a long time to throw the insulating wire rope and the stator wire, and the physical energy of the operators is exhausted. Large, the whole overhaul process has a relatively high risk. Therefore, if a special tool for pulling back the sub-conductors conveniently and quickly can be designed and invented, and the distance between the two sub-conductors can be fixed at 0.4m, the operators will be able to more safely and efficiently complete power failure or electrified installation, and replace spacer maintenance. Work.

Contents of the invention

The purpose of the present invention is to overcome the defects of the above-mentioned prior art and design a special-purpose device for replacing the 220kV spacer when the power is off or live, which can conveniently and quickly pull back the sub-conductors and can fix the distance between the two sub-conductors at 0.4m. tool.

The purpose of the present invention is achieved through the following technical solutions.

A special tool for replacing 220kV spacer rods when the power is off or on, and it is characterized in that it includes an upper hook and a lower hook, and the upper and lower hooks are respectively connected to the threads by a labor-saving screw rod; the hooks of the upper and lower hooks are The ends are respectively connected with a trigger-type locking hook. After the trigger device is triggered, the locking device locks the trigger-type locking hook, so that the upper hook and the lower hook are respectively closed with the trigger-type locking hook to form a circular structure; a pulley is fixedly connected to the side of the upper hook , an insulating operating rod connector is fixedly connected to one side of the lower hook, and the screw rod is fixed by the screw rod locking device.

Beneficial effect

The invention can solve the problems of cumbersome steps, long operation time, high work intensity and high operation risk in the previous operation method of replacing the spacer, greatly improves the work efficiency, enhances the safety of the maintenance personnel, and makes the replacement of the 220kV spacer in a power failure or live Maintenance operations are more standardized and normalized.

Description of drawings

Fig. 1 is a left sectional view of the closed state of the present invention;

Fig. 2 is the front view of the closed state of the present invention;

Fig. 3 is a right sectional view of the closed state of the present invention;

Fig. 4 is a left sectional view of the open state of the present invention;

Fig. 5 is the front view of the open state of the present invention;

Fig. 6 is a right sectional view of the present invention in an open state.

detailed description

See Fig. 1-Fig. 6, a special tool for replacing 220kV spacer with power off or live, it is characterized in that it includes an upper hook 2 and a lower hook 6, and a labor-saving screw rod 4 is passed between the upper and lower hooks and its thread respectively Cooperate with the connection; the hook ends of the upper hook 2 and the lower hook 6 are connected with a trigger locking hook 1 respectively. A round structure is formed after the type locking hook 1 is closed; a pulley 3 is fixedly connected to one side of the upper hook 2, and an insulating operating rod connector 5 is fixedly connected to one side of the lower hook 6, and the screw rod is fixed by a screw locking device 9 .

1. Design principle

During live work, if the operator at the lower sub-conductor wants to pull back the upper sub-conductor, he can only use insulated tools. In addition to the insulating wire rope, the commonly used insulating tool is an insulating operating rod. A hook is added to the insulating operating rod to facilitate It can preliminarily realize the function of pulling the upper sub-conductor. However, to reduce the distance between the two sub-conductors and fix it to 0.4m, and to loosen and remove the hook after installing the spacer rod, the design of adding a hook to the insulating operating rod cannot meet the requirements, and it is necessary to use the labor-saving screw rod. The function of tightening and loosening can be realized by adding hooks at both ends of the labor-saving screw rod. Therefore, the initially conceived tool is composed of an insulating operating rod, a labor-saving screw, and a hook. After more in-depth thinking and design, the hook is replaced by a trigger-type locking hook to prevent the wire from popping out during the replacement process; a pulley is added to the tool, which is used in conjunction with the insulating wire rope, and is operated by the ground electrician to tighten the two sub-wires spacing. We envisage that after using special tools, the labor intensity of equipotential workers can be reduced, and the working time can be greatly shortened, so as to reduce the risk of workers in the process of equipotential live work.

2. Technical requirements for tool materials and structures

(1) labor-saving screw rod

It is used in conjunction with the upper hook and the lower hook to shorten the distance between the two wires. The middle part of the screw rod is a regular hexagon, which can be fixed and rotated with a wrench. The material is LuCr-60 aluminum alloy, and the surface anti-corrosion treatment is surface anodic oxidation. The working load is 1KN, the safety factor is 2.5 times.

(2) Upper hook, lower hook, trigger locking hook

The upper hook and the lower hook cooperate with the labor-saving screw rod, installed at both ends of the labor-saving screw rod, hook the two wires, and touch the trigger device to activate the trigger locking hook, and cooperate with the locking device to prevent the wire from popping out. Before this special tool, the wire is always stuck in the trigger latch hook closure structure. The material is LuCr-40 aluminum alloy, the surface anti-corrosion treatment is surface anodic oxidation, the working load is 1.5KN, and the safety factor is 2.5 times.

(3) Trigger device

Cooperate with the trigger locking hook, when the contact touches the wire, the trigger locking hook pops out. The material is 45# steel, the surface anti-corrosion treatment is surface anodic oxidation, the working load is 1.5KN, and the safety factor is 2.5 times.

(4) Locking device

Cooperate with the trigger-type locking hook, after the trigger-type locking hook starts to pop up, the part of the hook body is stuck with the locking device. The material is LuCr-40 aluminum alloy, the surface anti-corrosion treatment is surface anodic oxidation, the working load is 1.5KN, and the safety factor is 2.5 times.

(5) screw locking device

Cooperate with the labor-saving screw rod, by rotating the screw rod locking device, the threaded part is fastened, and the fixed screw rod cannot be rotated. The material is high-strength ABS engineering plastics.

(6) Pulleys and fasteners, hanging wire devices, insulating wire ropes

Cooperate with the insulating wire rope, the insulating wire rope passes through the pulley, one end is connected to the hanging wire device, and the other end is controlled by the ground staff. The staff controls the insulating wire rope, lifts the lower sub-conductor, tightens and reduces the distance between the two sub-conductors, so that the lower hook can catch and lock the lower sub-conductor. The pulley is made of high-strength ABS engineering plastic, the fastener is made of 45# steel, the hanging wire device is made of LuCr-60 aluminum alloy, the surface anti-corrosion treatment is anodized, and the insulating wire rope is made of natural fiber insulating rope (silk rope ). The working load is 1.5KN, and the safety factor is 2.5 times.

(7) Insulated operating rod and connectors

Cooperating with the special tool as a whole, the staff on the lower sub-conductor fixes the upper end of the ratchet locking device of the special tool on the upper sub-conductor through the insulating operating rod. The material is fiberglass epoxy resin, the working load is 0.2KN, and the safety factor is 2.5 times.

3. Assembly of a special tool for replacing 220kV spacer rods when power is off or live

(1) labor-saving screw rod

It is used to connect the upper hook and the lower hook, shorten the distance between the two wires, and after the spacer is installed, release it to open the trigger locking hook.

(2) Upper hook, lower hook

It is used to connect the labor-saving screw rod, the trigger device is installed at the upper end of the hook body opening, the locking device is installed at the lower end of the hook body opening, and the screw rod locking device is installed at the hook body part. The pulley, the connecting piece of the insulating operating rod are installed and the hook body part of the upper hook.

(3) Trigger locking hook

The trigger-type locking hook is mounted on the ends of the upper and lower hooks and connected with the trigger device. After being activated and ejected, it is connected and closed with the locking device.

(3) Trigger device

The trigger device is mounted on the upper end of the opening of the hook body.

(4) Locking device

The locking device is installed at the lower end of the opening of the hook body.

(5) screw locking device

The locking device of the screw rod is installed on the hook body, and contacts with the screw rod after rotation to fasten the screw rod.

(6) Pulleys and fasteners, hanging wire devices, insulating wire ropes

Cooperate with the insulating wire rope, the insulating wire rope passes through the pulley, one end of the edge wire rope is connected to the hanging wire device, and the other end is controlled by the ground staff, the pulley is installed on the hook part of the special tool, the hook hooks the upper sub-conductor, and the hanging wire device hooks the lower sub-conductor , the ground staff controls the insulating wire rope, lifts the lower sub-conductor, tightens and reduces the distance between the two sub-conductors. ,

(7) Insulated lever connector

Connect the insulated operating rod, and the staff on the lower sub-conductor fix the upper end of the ratchet locking device of the special tool on the upper sub-conductor through the insulated operating rod.

Claims (1)

1. the specific purpose tool of a power failure or charged for replacement 220kV conductor spacer, it is characterized in that, comprise one to rise to the bait (2) and a lower hook (6), be connected with its threaded engagement respectively by a laborsaving screw mandrel (4) between upper and lower hook; A trigger-type locking hook (1) is connected at the chimoto of rise to the bait (2), lower hook (6), after trigger equipment (7) triggers, locking device (8) pins trigger-type locking hook (1), make to rise to the bait (2), lower hook (6) closed with trigger-type locking hook (1) respectively after forms one and justifies structure; Rising to the bait, (2) side is fixedly connected with pulley (3), is fixedly connected with insulating bar connector (5) in lower hook (6) side, by the fixing screw mandrel of screw mandrel locking device (9).