CN201126944Y

CN201126944Y - Chucking tools clamping apparatus for altering cross-arm-end insulator for 750kV circuit with electrification

Info

Publication number: CN201126944Y
Application number: CNU2007203113064U
Authority: CN
Inventors: 冯玉昌; 曾林平; 顿连彪; 丁永福; 张松林
Original assignee: Northwest China Grid Co Ltd
Current assignee: Northwest China Grid Co Ltd
Priority date: 2007-12-18
Filing date: 2007-12-18
Publication date: 2008-10-01
Anticipated expiration: 2017-12-18

Abstract

A 750 kV circuit charged replacement cross arm end insulator clamp is disclosed, the clamp is composed by a cross arm end clamp (1), a front clamp (2) and a hydraulic pressure tightener (3); hydraulic pressure telescopic rod of the hydraulic pressure tightener (3) is mechanically fixedly connected with the front clamp (2) and the cross arm end clamp (1) respectively, a mould cavity of the front clamp (2) is matched with surface shape of insulator steel cap, a flange positioning stop hole is formed between maximum diameter of the steel cap and a porcelain dish; the cross arm end clamp (1) is provided with a groove in the middle whose shape is matched with that of a drawing plate and whose two sides are provided with bolt via holes corresponding to the bolt on the drawing plate; the utility model meets the requirements of the first insulator of 750 kV circuit charged replacement cross arm end, and has high intensity, small volume, simple structure as well as convenient, secure and reliable structure owing to adoption of titanium alloy.

Description

750kV circuit charged for replacement cross-arm end insulator jig

Technical field

The utility model relates to the instrument of first insulator of a kind of 750kV of being used for extra high voltage network charged for replacement cross-arm end.

Background technology

The 750kV extra high voltage network is the newly-built voltage levels circuit of China, owing to be newly-built circuit, the various tool that is used for charged detection is less, and the instrument of particularly changing null value, low value monolithic insulator is badly in need of development.

The lead of ultra-high-tension power transmission line is suspended on the electric power line pole tower by suspension insulator string mostly, insulator string is formed by the bulb of multi-disc dish-type insulator and the steel cap serial connection of dribbling nest, every insulator all has very high electric and mechanical strength, has guaranteed the reliability service of transmission line.But after operation for many years, deterioration can take place and lose efficacy in indivedual insulators, need change at any time.For not because of changing insulator with line outage, just need on ultra-high-tension power transmission line, carry out live line working, by the workman a slice deterioration insulator is not taken out from an insulator string under the power-off condition at circuit, must use a kind of special mould clamp that has tightening device, purpose is to make the deterioration insulator become relaxed state from tension, under relaxed state, the bulb of deterioration insulator and steel cap could be thrown off from the steel cap of adjacent insulator correspondence and bulb, it be taken out from insulator string change.First insulator near the cross-arm end is special owing to its position, and the jig that is exclusively used in close first insulator of cross-arm end of replacing is less.The device of existing charged for replacement straight line monolithic insulator is relatively heavier, for weight reduction, and aluminum alloy materials generally commonly used, but because intensity of aluminum alloy is lower, the volume of jig is restricted the application operating inconvenience than big and structure.

Summary of the invention

The purpose of this utility model is the jig that a kind of 750kV of being applicable to extra high voltage network of design is changed insulator, is used for first insulator of charged for replacement cross-arm end.

Design a kind of 750kV circuit charged for replacement cross-arm end insulator jig, this jig is made up of cross-arm end card, preceding card and hydraulic pressure tightener, the hydraulically extensible bar of hydraulic pressure tightener is connected with cross-arm end card mechanical fixation with preceding card respectively, it is characterized in that: the surface configuration of the die cavity of card and insulator steel cap is suitable before described, forms the flange positioning spigot between steel cap maximum gauge and porcelain dish; The centre of described cross-arm end card is provided with a groove, and the shape of groove and the shape of towing plate are suitable, has in the groove two sides and the corresponding bolt via hole of towing plate upper bolt hole;

Described cross-arm end card is a monomer independence rigid structure, and its two ends are symmetrically distributed with two connecting holes that are connected with the hydraulic pressure tightener;

The material of described cross-arm end card, preceding card is a titanium alloy.

The utility model has satisfied the needs of first insulator of 750kV charged for replacement cross-arm end, owing to use titanium alloy, the high volume of intensity is little, and is simple in structure, easy to use, safe and reliable.

Description of drawings

Fig. 1 is the utility model embodiment assembly structure schematic diagram;

Fig. 2 is preceding card structure front view.

Fig. 3 is preceding card structure vertical view;

Fig. 4 is a cross-arm end card structure front view;

Fig. 5 is a cross-arm end card structure vertical view;

Fig. 6 is A-A sound face figure among Fig. 4.

Among the figure, 1. cross-arm end card, 2. before card, 3. hydraulic pressure tightener, 4. before the card main body, 5. before card loam cake, 6. bearing pin, 7. nail word screw, 8. band pad nut.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

As shown in Figure 1, first insulator jig of charged for replacement cross-arm end that the utility model relates to is made up of cross-arm end card 1, preceding card 2 and two hydraulic pressure tighteners 3, hydraulic pressure tightener 3 has manual lever, cross-arm end card 1 and preceding card 2 are arranged in parallel, and the expansion link of hydraulic pressure tightener 3 links to each other by bolt with cross-arm end card 1 and preceding card 2 respectively.

As Fig. 2, shown in Figure 3, but the structure of the folding that preceding card 2 is made up of preceding card main body 4, preceding card loam cake 5, an end of preceding card loam cake 5 has " U " shape gap, an other end that a circular hole is arranged, and there is the groove of a half-body of revolution at the middle part; The two ends of preceding card main body 4 are symmetrically distributed with blocks the groove that loam cake 5 has a half-body of revolution before two connecting hole, middle parts that are connected with hydraulic pressure tightener 3 correspond to, a through hole that is disconnected by groove is respectively arranged in the groove both sides, half-body of revolution groove on the preceding card main body 4 manufactures mutually with the half-body of revolution groove on the preceding card loam cake 5, form a complete rotary body die cavity altogether, be used to hold insulator steel cap; Preceding card loam cake 5 flexibly connects with preceding card main body 4 by two bearing pins 6 and T-shaped screw 7, the head of T-shaped screw 7 has a circular hole, behind the circular hole before one of them bearing pin 6 passes on the card main body 4 and the circular hole of T-shaped screw 7 T-shaped screw 7 is connected on the preceding card main body 4, card main body 4 and preceding card loam cake 5 flexibly connected before another circular hole of card main body 4 and the circular hole on the preceding card loam cake 5 made before another bearing pin 6 passed during assembling, move in " U " shape gap that blocks before T-shaped screw 7 turns to it on loam cake 5, with band pad nut 8 be spun on make on the T-shaped screw 7 before 5 lockings of card loam cake, when unscrewing band pad nut 8 and unclamping T-shaped screw 7 before card loam cake 5 can upwardly open around bearing pin 6 rotations; Before the formed rotary body die cavity of card main body 4 and preceding card loam cake 5 combinations promptly before the die cavity of card 2 suitable with the surface configuration of insulator steel cap, formation flange positioning spigot between steel cap maximum gauge and porcelain dish.

As Fig. 4, Fig. 5, shown in Figure 6, described cross-arm end card 1 is a monomer independence rigid structure, its two ends are symmetrically distributed with two connecting holes that are connected with hydraulic pressure tightener 3, the centre is provided with one " U " type groove, the shape of " U " groove and the shape of towing plate are suitable, have in the two sides of " U " groove and the corresponding bolt via hole of towing plate upper bolt hole;

750kV circuit strain insulator string all is the two insulator string structures of level basically, the insulator model is two kinds of NGK-400 and NGK-420, and the cross-arm end is ball-eye (model Q-42), parallel link plate (model P-42S) and towing plate (model QY-42) near the gold utensil of insulator; One end structure of ball-eye is and the bulb that matches near first insulator steel cap ball-and-socket of cross-arm end, link to each other with first insulator steel cap ball-and-socket by bulb, the other end of ball-eye has a bolt connecting hole, connect with parallel link plate bolt, towing plate is a platy structure, two ends connect by bolt with parallel link plate, and there is a bolt via hole centre.When changing first insulator of cross-arm end, the intermediate groove of cross-arm end card 1 rides on the towing plate, and the bolt via hole of its groove both sides is corresponding with the bolt via hole in the middle of the connecting plate, inserts connecting bolt and makes cross-arm end card 1 location; Simultaneously, preceding card 2 is stuck on other insulator steel cap locatees, and operating hydraulically operated tightener 3 relaxes first insulator near the cross-arm end, realizes charged for replacement.

The material selection titanium alloy TC 4 of the preceding card main body 4 of preceding card 2 and preceding card loam cake 5, cross-arm end card 1.The proportion of titanium alloy TC 4 is 1.6 times of aluminium alloy LC4, but mechanical strength is more than 2 times of aluminium alloy, its physical dimension can be more half as large than the jig of aluminum alloy materials, overall weight is lighter than aluminium alloy jig, in addition because physical dimension is little, the installing space that needs during use is little, and operation is also convenient relatively a lot.

Claims

1.750kV circuit charged for replacement cross-arm end insulator jig, form by cross-arm end card (1), preceding card (2) and hydraulic pressure tightener (3), the hydraulically extensible bar of hydraulic pressure tightener (3) is connected with preceding card (2) mechanical fixation with cross-arm end card (1) respectively, it is characterized in that: the surface configuration of the die cavity of card (2) and insulator steel cap is suitable before described, forms the flange positioning spigot between steel cap maximum gauge and porcelain dish; The centre of described cross-arm end card (1) is provided with a groove, and the shape of groove and the shape of towing plate are suitable, has in the groove two sides and the corresponding bolt via hole of towing plate upper bolt hole.

2. 750kV circuit charged for replacement cross-arm end insulator jig according to claim 1 is characterized in that: the material of the preceding card main body (4) of card (2) and preceding card loam cake (5), cross-arm end card (1) is a titanium alloy TC 4 before described.