CN102983529B - Replacing tool for quadruple composite tension insulator chains of ultra-high voltage lines - Google Patents

Abstract

The invention discloses a replacing tool for quadruple composite tension insulator chains of ultra-high voltage lines. The replacing tool comprises two large knife clamps, wherein the lower ends of the large knife clamps are connected by taking-up mechanisms. The taking-up mechanisms comprise combined hydraulic screw rods and insulating pull rods, wherein the two ends of the insulating pull rods are respectively connected with the lower ends of the two large knife clamps through the combined hydraulic screw rods. According to the replacing tool, the two taking-up mechanisms and the two large knife clamps are used together in a matching manner, loads on the insulator chains can be transferred to the replacing tool simply and conveniently, so that the insulator chains are in loose states, the overhaul and the replacement of the insulator chains are facilitated, and the replacing tool is simple in structure, convenient and safe to use and applicable to the maintenance and the overhaul of power transmission equipment on the ultra-high voltage transmission lines and high above the ground.

Description

UHV line quadruple tensile composite insulator string replacement tool

technical field

The invention relates to the field of tools for maintenance of UHV transmission lines and live working tools, in particular to a replacement tool for strings of quadruple tension-resistant composite insulators of UHV lines.

Background technique

Before the present invention was proposed, with the rapid development of the electric power industry, UHV AC transmission lines began to adopt the technology of quadruple tensile composite insulators. However, due to the large number of transmission line equipment hanging on the line, there are relatively large loads on the through-hole screw and both ends of the two-connection plate on the line, and the load must be removed first during maintenance and repair of equipment and live work. And because the maintenance and repair equipment and live work are high-altitude manpower operations, and the transmission line carries UHV current, the existing power transmission equipment and repair tools cannot meet the needs of UHV AC transmission live maintenance. Therefore, the development of corresponding maintenance and repair equipment and special tools for live work has become an important aspect to ensure the safe and stable operation of UHV AC transmission lines.

Contents of the invention

The object of the present invention is to overcome the disadvantages of the above-mentioned background technology, and provide a simple, safe, labor-saving and easy-to-use replacement tool for quadruple tensile composite insulator strings of UHV lines.

In order to achieve the above objectives, the present invention provides a replacement tool for four-connected tensile composite insulator strings for UHV lines, which includes two large knife cards, and the lower ends of the two large knife cards are connected by a wire take-up mechanism, and the wire take-up mechanism includes Combined hydraulic screw rod and insulating pull rod, both ends of the insulating pull rod are respectively connected to the lower ends of the two large knife cards through a set of combined hydraulic screw rods. Through the use of two sets of wire take-up mechanisms and two large knife cards, the load on the insulator string can be transferred to the replacement tool simply and conveniently, so that the insulator string is in a loose state, so that the maintenance and replacement of the insulator string can be facilitated , simple in structure and convenient and safe to use.

The replacement tool also includes a tension transfer mechanism for transferring the tension of the bolts at the connection ends of the insulator strings. The tension transfer mechanism includes an airfoil clamp, a tightening screw and an end clamp. The knife is clamped, the end clamp is mounted on the insulator string end of the insulator string, and the two ends of the tightening screw are respectively connected with the wing clamp and the end clamp. Since the load on the insulator string has been transferred, the insulator string is in a loose state, and the insulator string is heavy, so the self-weight of the insulator string will generate tension on the bolts at the connection ends of the insulator string, which is not conducive to the disassembly of the bolts; The tension transfer mechanism can transfer the tension to the tension transfer mechanism, thereby reducing the difficulty of dismounting the bolts.

In the above solution, the middle part of the wing-shaped card is provided with a bayonet that matches the knife card, the end card is formed by splicing two end card blocks, and the splicing surface in the middle of the end card block is provided with a There is a notch matching the outer diameter of the end of the insulator string; the middle part of the wing card is clamped on the big knife card, and the middle part of the two end blocks is clamped on the end of the insulator string Above, the two ends of the airfoil card are respectively connected to the two ends of the end card through one of the tightening screw rods.

In the above solution, the airfoil card is provided with grooves. Such a design saves the consumption of raw materials and reduces the weight of the tool under the premise of ensuring its strength.

In the above solution, the end clamp is provided with a groove, which saves the consumption of raw materials and reduces the weight of the tool under the premise of ensuring its strength.

In one aspect of the present invention, the load on the insulator string can be simply and conveniently transferred to the replacement tool by using two sets of wire take-up mechanisms together with two large knife cards, so that the insulator string is in a relaxed state, so that the insulator string The maintenance and replacement of the string is simple in structure and convenient and safe to use; on the other hand, the tension at the connection end of the insulator string is transferred to the tension transfer mechanism through the added tension transfer mechanism, which reduces the difficulty of dismounting the bolts.

Compared with the prior art, the present invention fully demonstrates its superiority in that it is simple, safe, labor-saving and convenient to use.

Description of drawings

Fig. 1 is the schematic diagram of the assembly structure after removing the tension transfer mechanism of the present invention;

Fig. 2 is the assembly structure schematic diagram of the present invention;

Fig. 3 is a schematic diagram of the oblique view of Fig. 2;

Fig. 4 is the structural representation of wing card among the present invention;

Fig. 5 is a side view structural schematic diagram of Fig. 4;

Fig. 6 is a schematic structural diagram of a middle-end card of the present invention;

FIG. 7 is a schematic side view of the structure of FIG. 6 .

In the figure: large knife card 1, wire take-up mechanism 2, combined hydraulic screw rod 2a, insulating pull rod 2b, tension transfer mechanism 3, airfoil card 3a, bayonet 3a1, tightening screw rod 3b, end card 3c, end card block 3c1 , Notch 3c2, insulator string 4, shielding ring 4a, insulator string end 4b, bolt 5, groove 6, two-joint plate 7, through-core screw 7a.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.

This embodiment provides a replacement tool for UHV line quadruple tension-resistant composite insulator strings, which includes two big knife cards 1, the lower ends of the two big knife cards 1 are connected by a wire take-up mechanism 2, and the wire take-up mechanism 2 includes a combination A hydraulic screw rod 2a and an insulating pull rod 2b, both ends of the insulating pull rod 2b are respectively connected to the lower ends of the two large knife holders 1 through a set of the combined hydraulic screw rod 2a. By using two sets of wire take-up mechanisms 2 together with two large knife cards 1, the load on the insulator string 4 can be simply and conveniently transferred to the replacement tool, so that the insulator string 4 is in a relaxed state, so that the insulator string 4 4 maintenance and replacement, simple structure and convenient and safe use.

The replacement tool also includes a tension transfer mechanism 3 for transferring the tension of the bolt 5 at the connection end of the insulator string 4. The tension transfer mechanism 3 includes a wing card 3a, a tightening screw 3b and an end card 3c. The type card 3a is clamped on the large knife card 1, the end clamp 3c is clamped on the insulator string terminal 4b of the insulator string 4, and the two ends of the tightening screw 3b are connected with the wing clamp respectively. 3a is connected to end card 3c. Since the load on the insulator string 4 has been transferred, the insulator string 4 is in a relaxed state, and the insulator string 4 is heavy, so the self-weight of the insulator string 4 will generate tension on the bolt 5 at the connection end of the insulator string 4, which is not conducive to the bolt. 5 disassembly; the added tension transfer mechanism 3 can transfer the tension to the tension transfer mechanism 3, thereby reducing the difficulty of dismounting the bolt 5.

The middle part of the above-mentioned airfoil card 3a is provided with a bayonet 3a1 matched with the big knife card 1, and the end card 3c is formed by splicing two end card blocks 3c1, and the splicing surface of the middle part of the end card block 3c1 is provided with There is a notch 3c2 matching the outer diameter of the end 4b of the insulator string; the middle part of the wing card 3a is clamped on the knife card 1, and the middle part of the two end clamping blocks 3c1 is clamped on the On the end 4b of the insulator string, the two ends of the wing card 3a are respectively connected to the two ends of the end card 3c through a tightening screw 3b. The wing card 3a is provided with a groove 6, which saves the consumption of raw materials and reduces the weight of the tool under the premise of ensuring its strength. The end clip 3c is provided with a groove 6, which saves the consumption of raw materials and reduces the weight of the tool under the premise of ensuring its strength.

Working process of the present invention is as follows:

First of all, the operator safely enters the operation point under the state of power failure or electrification, and the operator clamps the upper ends of the two big knife cards 1 respectively on the center-through screw rods 7a of the two connecting plates 7 at the two ends of the insulator string 4, and the big knife cards 1 and the contact point of the two connecting plates 7 as the fulcrum, and the through-hole screw 7a as the anti-beam force point; then, upload the take-up mechanism 2, and use the take-up mechanism 2 to clamp the two large knives 1 is connected to the lower end, and the combined hydraulic screw rod 2a is operated. The combined hydraulic screw rod 2a drives the big knife card 1 to be stressed. The core-through screw 7a is the point of action, reverses the tension of the wires, and transfers the load on the insulator string 4 to the replacement tool, so that the insulator string 4 is loosened; then, the shielding ring 4a is removed, and the wing card 3a and the The end clips 3c are clamped and mounted on the big knife clip 1 and the insulator string terminal 4b respectively, and the two ends of the two tightening screw rods 3b are respectively connected to the two ends of the wing clip 3a and the end clip 3c Then, operate the tightening screw 3b to tighten the connecting end of the insulator string 4, and take off the bolt 5; finally, remove the tension transfer mechanism 3, put the old insulator string 4 vertically and then completely pull it out , and replace the new insulator string 4 with the reverse operation process.

The present invention uses two sets of take-up mechanisms 2 together with two large knife cards 1 to simply and conveniently transfer the load on the insulator string 4 to the replacement tool, so that the insulator string 4 is in a relaxed state, so that the The maintenance and replacement of the insulator string 4 is simple in structure, convenient and safe to use; the tension at the connection end of the insulator string 4 is transferred to the tension transfer mechanism 3 through the additional tension transfer mechanism 3, which reduces the cost of dismounting the bolt 5. difficulty.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (4)

1. an extra high voltage line tetrad strain composite insulator string changes instrument, comprise two machete cards (1), it is characterized in that: the lower end of described two machete cards (1) is connected by take-up mechanism (2), described take-up mechanism (2) comprises assembled hydraulic screw mandrel (2a) and insulated tension pole (2b), and described insulated tension pole (2b) two ends are connected with the lower end of described two machete cards (1) respectively by a set of described assembled hydraulic screw mandrel (2a); Also comprise the pulling force transfer device (3) for shifting the suffered tension force in insulator string (4) link place bolt (5), described pulling force transfer device (3) comprises wing clamp (3a), tightens up screw mandrel (3b) and end card (3c), described wing clamp (3a) is installed on described machete card (1), described end card (3c) is installed on the insulator string termination (4b) of described insulator string (4), described in tighten up screw mandrel (3b) two ends and block (3c) with described wing clamp (3a) be connected with holding respectively.

2. extra high voltage line tetrad strain composite insulator string as claimed in claim 1 changes instrument, it is characterized in that: the middle part of described wing clamp (3a) is provided with the bayonet socket (3a1) matched with described machete card (1), described end card (3c) is spliced by two pieces of ends fixture block (3c1), and the Mosaic face at described end fixture block (3c1) middle part is provided with the recess (3c2) matched with described insulator string termination (4b) external diameter; The middle part of described wing clamp (3a) is installed on described machete card (1), the middle part of described two pieces of ends fixture block (3c1) is installed on described insulator string termination (4b), and described wing clamp (3a) two ends are connected with described end card (3c) two ends respectively by tightening up screw mandrel (3b) described in one.

3. extra high voltage line tetrad strain composite insulator string as claimed in claim 1 or 2 changes instrument, it is characterized in that: described wing clamp (3a) is provided with groove (6).

4. extra high voltage line tetrad strain composite insulator string as claimed in claim 1 or 2 changes instrument, it is characterized in that: described end card (3c) is provided with groove (6).