CN101820144B - Special tool of live line work for replacing rectilinear insulator string of large-section double multiple wire - Google Patents

Abstract

The invention discloses a special tool for live replacement of a large cross-section double-split wire straight line whole string of insulators, including an insulating wire lifting rope, an insulating sheave wheel regulator, a wire hook, a nut screw rod tightening device, and a fixed base. The fixed base is set on the screw rod of the nut screw tightening device and moves relative to the screw rod. The lower end of the screw rod is connected with the insulated sheave-type regulator, and a fixed pulley is set on the insulated sheave-type regulator. After bypassing the fixed pulley of the insulating rope wheel regulator, wire hooks are arranged at both ends thereof, and a positioning locking device matched with the cross-arm angle steel is arranged on the fixed base. The advantages of the present invention are: the insulating tool has good electrical performance, high mechanical strength, large safety factor, can be applied to 220kV Shangzhuang line with large cross-section double-split conductors, and is vertically arranged; the distance between the upper and lower sub-lines is 600mm, and the straight line single and double string insulators and Other 220kV lines have different types of straight lines.

Description

A special tool for replacing the straight line insulators of large cross-section double-split conductors while live

technical field

The invention relates to a tool for replacing wire insulator strings with electricity, in particular to a special tool for replacing the whole string of insulators with large cross-section double-split wires with electricity. the

Background technique

With the rapid development of the social and national economy, the demand for electricity consumption in urban and rural areas has grown rapidly, and the line load of the 220kV power grid has also continued to rise. Due to the increasingly tense line corridors, 220KV lines are currently in operation, and double circuits on the same pole and LGJ-630mm are generally used. ² Large cross-section double-split conductors, arranged vertically; the spacing between the upper and lower sub-wires is 600mm, and the cross-section of the previously designed 220KV line is more than doubled and the vertical load is heavy. The vertical spacing between the upper and lower sub-wires is increased by 200mm. The tools for insulating strings cannot be applied, and it is necessary to develop an insulating string replacement tool that can be applied to the new 220kV large-section double-split conductors.

Contents of the invention

The purpose of the present invention is to overcome the disadvantages of the prior art, and provide a special tool with a wide application range, which can be used for live replacement of the whole string of insulators of the large cross-section double-split conductor. the

The utility model relates to a special tool for replacing large cross-section double-split wire straight-line whole string insulators with electricity. The fixed base is set on the screw rod of the nut screw tightening device and moves relative to the screw rod. The lower end of the screw rod is connected with the insulated sheave-type regulator, and a fixed pulley is set on the insulated sheave-type regulator. After the rope bypasses the fixed pulley of the insulating rope wheel regulator, wire hooks are provided at both ends, and a positioning locking device that matches the cross-arm angle steel is provided on the fixed base. the

This kind of special tool for live replacement of large cross-section double-split wire straight line whole string insulators, when in use, select the corresponding lifting rope according to the insulator strings of different lengths, after assembling the special tool, use the positioning and locking device of the fixed base Lock the tool on the cross arm, then hook the wire hooks at both ends of the wire rope into the wire, then tighten the nut screw on the cross arm to tighten the wire device, and the balance of the fixed pulley at the lower part of the insulating rope wheel regulator Under the action, the upper and lower sub-conductors are evenly promoted. the

There are many structures for positioning and locking devices on the fixed base, the following are the two forms provided by the applicant:

One is that the fixed base is provided with positioning bolts, and the bolts pass through the upper and lower end surfaces of the fixed base, and the fixed base is fixed on the cross arm by bolts and nuts. the

The other is: the lower end surface of the fixed base is provided with a slot for positioning, and the cross-arm angle steel can be inserted into the slot, and the fixed base is also provided with a long slot parallel to the slot to communicate with the upper and lower end surfaces of the fixed base. , A threaded locking piece is provided in the slotted hole. the

The positioning and locking device of this structure, when in use, can firstly snap the draw-in groove of the fixed base into the cross arm, and then use the threaded locking piece to fix them. the

There are two slots on the fixed base. the

Two card slots are provided on the fixed base, and the double angle steel at the place where the linear insulator string is suspended at the end of the cross arm can be respectively snapped into the card slots for positioning. the

A rubber pad is also arranged between the fixed base and the screw rod. the

Since the fixed base is set on the screw rod, and the screw rod must move up and down relative to the fixed base, if there is direct contact between the screw rod and the fixed base, it is easy to cause wear between the two, so between the two A rubber pad is set between them, which can not only prevent wear and tear between the two, but also play a role in limiting the position. the

The nut screw tightening device is an anti-twist nut screw, and the anti-twist nut screw includes a screw rod and a ratchet locking nut. the

When the lock nut is turned, the screw rod rotates with the ratchet nut, and moves vertically upwards or downwards through the helical wires meshing with each other, and the screw rod does not rotate horizontally, so that the special live tool can be used for double splitting. The tightening or loosening of the wires enables the replacement of insulator strings. the

The connection between the lower end of the screw rod and the insulating sheave regulator is a movable and detachable connection. the

The movable and detachable connection between the screw rod and the insulating sheave regulator can be easily disassembled by the electrician for storage and transportation. the

The connection between the wire lifting rope and the wire hook is a movable and detachable connection. the

The movable and detachable connection can be a threaded connection or a bolted connection. the

The insulating sheave regulator is provided with a row of regulating holes from top to bottom, and the fixed pulley is detachably connected to the regulating holes of the insulating sheave regulator. the

This form of flexible connection is adopted between the fixed pulley and the insulating sheave regulator, and the fixed sheave can be fixed at different positions of the absolute sheave regulator as required. the

In summary, the advantages of the present invention are:

1. This special tool for live replacement of large-section double-split conductors with straight-line strings of insulators is safe and portable, easy to install and reduce labor intensity for operators, and has high work efficiency for on-site live work. problem. After the completion of the project, it will fill in the gaps in using new materials for live replacement tools for the large-section double-split conductor straight-line string insulators for 220kV lines and other 220KV line straight-line tower insulator strings. the

2. This set of insulating tools has good electrical performance, high mechanical strength, and a large safety factor. It can be applied to 220kV Shangzhuang line with large cross-section double-split conductors, arranged vertically; the distance between the upper and lower sub-lines is 600mm, straight single and double string insulators and other 220kV lines. Different types of straight lines; live replacement of insulator strings of different lengths. the

3. This tool is easy to carry and replaces the traditionally used heavy and hard insulated pull rods. It has the characteristics of simple operation and convenient installation, reducing the labor intensity of high-altitude workers, and the operation process is safe and efficient. the

Description of drawings

Fig. 1 is a schematic diagram of the structure of the special tool for replacing large cross-section double-split conductor straight line whole string insulators in the present invention

Figure 2 is an enlarged view of A in Figure 1

Figure 3 is a schematic diagram of the structure of the fixed base

Figure 4 is a bottom view of Figure 3

Reference Signs Explanation 1 Insulated wire rope 2 Insulated rope wheel regulator 21 Adjusting hole 3 Conductor hook 4 Nut screw rod tightening device 41 Screw rod 42 Ratchet lock nut 5 Fixed base 51 Positioning card slot 52 Long slot hole 53 Thread lock Fastener 54 rubber pad 6 fixed pulley 7 cross arm angle steel

Detailed ways

The present invention will be described in more detail below in conjunction with examples. the

Example 1

A special tool for live replacement of large cross-section double-split wire straight-line whole string insulators as shown in Figure 1-4, including an insulating wire lifting rope 1, an insulating rope wheel regulator 2, a wire hook 3, and a nut screw rod tightening device 4. Fix the base 5. The lower end surface of the fixed base is provided with a slot 51 for positioning, and the cross-arm angle steel 7 can be snapped into the slot, and the fixed base is also provided with a long slot parallel to the slot to communicate with the upper and lower end surfaces of the fixed base. 52, a threaded locking member 53 is provided in the slotted hole. There are two slots on the fixed base. A rubber pad 54 is also arranged between the fixed base and the screw rod. The nut screw tightening device 4 is an anti-twist nut screw, and the anti-twist nut screw includes a screw 41 and a ratchet locking nut 42 . The connection between the lower end of the screw mandrel 41 and the insulating sheave regulator 2 is a movable and detachable threaded connection. The connection between the wire lifting rope and the wire hook is a movable and detachable threaded connection. The insulating sheave regulator 2 is provided with a row of regulating holes 21 from top to bottom, and the fixed pulley 6 is movably and detachably connected to the regulating holes 21 of the insulating sheave regulator. The insulation is "poly-p-phenylene benzobisoxazole fiber" (abbreviated as PBO, trade name is Zylon), which is an insulated wire rope processed by a special structure according to the stress condition of live work. This is a kind of rope with a tensile strength more than 10 times higher than that of steel fiber rope, a kind of essential non-wetting moisture regain rate of only 0.6%, a kind of elongation at break of only 2.5-3.5%, and a kind of limiting aerobic index of 68. An ultra-high-strength insulating rope made of super (superior) fibers that charred in a vertical flame with almost zero length. Therefore, it is the best moisture-proof and flame-retardant ultra-high-strength insulated wire rope at home and abroad. The wire hook is a high-strength aluminum alloy wire hook. the

The parts not described in this embodiment are the same as the prior art. the

Claims (9)

1. A special tool for live replacement of large-section double-split conductor straight-line whole string insulators, characterized in that it includes an insulated wire rope (1), an insulated rope wheel regulator (2), a wire hook (3), and a nut wire The rod tightening device (4) and the fixed base (5), the fixed base is set on the screw rod (41) of the nut screw rod tightening device and moves relative to the screw rod, the lower end of the screw rod is adjusted with the insulating sheave The insulated rope wheel regulator is connected with a fixed pulley (6), and the insulated wire rope (1) is bypassed by the fixed pulley (6) of the insulated rope wheel regulator. The hook (3) is provided with a positioning locking device matched with the cross-arm angle steel on the fixed base. 2. The special tool for live replacement of large cross-section double-split wires and straight string insulators according to claim 1, characterized in that: the lower end surface of the fixed base (5) is provided with a positioning slot (51), and the cross-arm angle steel can be clamped Insert in this draw-in groove, also be provided with the elongated slotted hole (52) of communication fixed base upper and lower end surface parallel with the draw-in groove on the fixed base, be provided with thread lock (53) in the elongated slotted hole. 3. The special tool for live replacement of large cross-section double-split wires and straight string insulators according to claim 2, characterized in that: there are two slots (51) on the fixed base. 4. The special tool for live replacement of large cross-section double-split wires and straight string insulators according to claim 3, characterized in that a rubber pad (54) is also provided between the fixed base (5) and the screw rod (41). 5. According to any one of claims 1 to 4, the special tool for live replacement of large-section double-split wires and straight string insulators is characterized in that: the nut screw tightening device is an anti-twist nut screw, and the The anti-twist nut screw includes a screw (41) and a ratchet lock nut (42). 6. The special tool for live replacement of large cross-section double-split conductor straight line whole string insulators according to claim 5, characterized in that: the connection between the lower end of the screw rod and the insulating sheave regulator is a movable and detachable connection . 7. The special tool for live replacement of large cross-section double-split wires and straight string insulators according to claim 6, characterized in that: the connection between the wire lifting rope and the wire hook is a movable and detachable connection. 8. The special tool for live replacement of large cross-section double-split conductor straight line whole string insulators according to claim 7, characterized in that: the movable and detachable connection can be a screw connection or a bolt connection. 9. The special tool for live replacement of large cross-section double-split conductor straight line whole string insulators according to claim 8, characterized in that: the insulating sheave regulator is provided with a row of adjustment holes (21) from top to bottom , the fixed pulley (6) is movable and detachable connected to the regulating hole of the insulating rope wheel regulator. the

Images