CN201126943Y

CN201126943Y - Chucking tools clamping apparatus for altering conductor-end insulator for 750kV circuit with electrification

Info

Publication number: CN201126943Y
Application number: CNU200720311305XU
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 wire end insulator clamp is disclosed, the clamp is composed by a rear clamp (1), a wire end clamp (2) and a hydraulic pressure tightener (3); hydraulic pressure telescopic rod of the hydraulic pressure tightener (3) is mechanically fixedly connected with the wire end clamp (2) and the rear clamp (1) respectively, a mould cavity of the rear clamp (1) 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 ball recession; the wire end clamp (2) is provided with a groove in the middle whose shape is matched with that of double-link bowl-head bolt end and whose two sides are provided with via holes corresponding to the bolt on the double-link bowl-head; the utility model meets the requirements of the first insulator of 750 kV circuit charged replacement wire 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 conductor wire 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 conductor wire 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 insulator string mostly, insulator string is formed by the bulb of multi-disc suspension 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 conductor wire end is special owing to its position, and the jig that is exclusively used in close first insulator of conductor wire 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 conductor wire end.

Design a kind of 750kV circuit charged for replacement conductor wire end insulator jig, this jig is made up of back card, conductor wire end card and hydraulic pressure tightener, the hydraulically extensible bar of hydraulic pressure tightener is connected with conductor wire end card mechanical fixation with the back card respectively, it is characterized in that: the die cavity of described back card and the surface configuration of insulator steel cap are suitable

Between steel cap maximum gauge and ball-and-socket, form the flange positioning spigot; The centre of described conductor wire end card is provided with a groove, and the shape of the shape of groove and duplex bowl hook bolt end is suitable, the groove two sides have with duplex bowl head on the corresponding via hole of bolt;

The conductor wire end card is by conductor wire end card main body, pin and turnover panel are formed, the two ends of main body are symmetrically distributed with two connecting holes that are connected with the hydraulic pressure tightener, mid portion has a groove, the shape of the shape of groove and a duplex bowl threaded end is suitable, have and the corresponding bolt via hole of a duplex bowl connecting bolt in the groove two sides, side at groove has a through hole that is disconnected by groove, one end shape of turnover panel and the groove shape on the main body match, and have one with main body on the circular hole that matches of through hole, there is a groove centre of turnover panel, and the other end of turnover panel has a connecting hole with the hydraulic pressure tightener; The circular hole that pin inserts on main body through hole and the turnover panel couples together main body and turnover panel, and turnover panel can rotate surely around pin, thus form one can folding cavity realize holding to duplex bowl head.

The material of described conductor wire end card, back card is a titanium alloy.

The utility model has satisfied the needs of first insulator of 750kV charged for replacement conductor wire 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 a back card structure front view.

Fig. 3 is a back card structure vertical view;

Fig. 4 is a conductor wire end card structure front view;

Fig. 5 is a conductor wire end card structure vertical view;

Among the figure, 1. back card, 2. conductor wire end card, 3. hydraulic pressure tightener, 4. back card main body, 5. back card loam cake, 6. bearing pin, 7. nail word screw, 8. band pad nut, 9. conductor wire end card main body, 10. turnover panel, 11. pins, 12. bolts.

Embodiment

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

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

As Fig. 2, shown in Figure 3, but the structure of the folding that back card 1 is made up of back card main body 4, back card loam cake 5, the end that loam cake 4 is blocked in the back 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 back card main body 4 are symmetrically distributed with two connecting hole, middle parts that are connected with hydraulic pressure tightener 3 and correspond to the groove that back card loam cake 5 has a half-body of revolution, a through hole that is disconnected by groove is respectively arranged in the groove both sides, half-body of revolution groove on the card main body 4 of back manufactures mutually with the half-body of revolution groove that block on the loam cake 5 back, form a complete rotary body die cavity altogether, be used to hold insulator steel cap; Back card loam cake 5 flexibly connects with back 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 after 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 card main body 4 of back, card main body 4 and back card loam cake 5 flexible connections after circular hole after another bearing pin 6 passes during assembling on another circular hole of card main body 4 and the back card loam cake 5 makes, move in " U " shape gap that blocks after T-shaped screw 7 turns to it on loam cake 5, be spun on band pad nut 8 and make back card loam cake 5 lockings on the T-shaped screw 7, when unscrewing band pad nut 8 and unclamping T-shaped screw 7 after card loam cake 5 can rotate around bearing pin 6 and upwardly open; Back card main body 4 and the formed rotary body die cavity of back card loam cake 5 the combinations i.e. die cavity of back card 1 are suitable with the surface configuration of insulator steel cap, formation flange positioning spigot between steel cap maximum gauge and ball-and-socket.

As Fig. 4, shown in Figure 5, conductor wire end card 2 is by conductor wire end card main body 9, pin 11 and turnover panel 10 are formed, the two ends of conductor wire end card main body 9 are symmetrically distributed with two connecting holes that are connected with hydraulic pressure tightener 3, mid portion has a groove, the shape of the shape of groove and duplex bowl hook bolt end is suitable, have and a duplex bowl connecting bolt 12 corresponding bolt via holes in the groove two sides, side at groove has a through hole that is disconnected by groove, one end shape of turnover panel 10 and the groove shape on the conductor wire end card main body 9 match, and have one with conductor wire end card main body 9 on the circular hole that matches of through hole, there is a groove centre of turnover panel 10, and the other end of turnover panel 10 has a connecting hole with hydraulic pressure tightener 3; Through hole and the circular hole on the turnover panel 10 that pin 11 inserts conductor wire end card main bodys 9 couple together conductor wire end card main body 9 and turnover panel 10, and turnover panel 10 can rotate around pin 11, thus form one can folding cavity realize holding to duplex bowl head.

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, conductor wire end is duplex bowl head (model WS-4228A) and square yoke plate (model LF-8455) near the gold utensil of insulator, duplex bowl head has and the corresponding ball-and-socket that is connected of first insulator pin of conductor wire end, bulb by first insulator of ball-and-socket and conductor wire end links to each other, the other end of duplex bowl head has bolt connecting hole, is connected with square yoke plate by connecting bolt 12.During first insulator of restringing end, the die cavity of conductor wire end card 2 is held on the duplex bowl head, block the connecting bolt 12 realization location and installation of duplex bowl head and square yoke plate by the bolt via hole of its die cavity both sides, back card 1 is stuck on other insulator steel caps locatees, operation hydraulic pressure tightener 3, first insulator near conductor wire end relaxed, realize charged for replacement.

The back card main body 4 of back card 1 and back are blocked loam cake 5, conductor wire end card main body 9 and are renovated 10 material selection titanium alloy TC 4.The proportion of titanium alloy TC 4 is bigger 1.6 times than 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 space that needs during use is little, and operation is also convenient relatively a lot.

Claims

1.750kV circuit charged for replacement conductor wire end insulator jig, form by back card (1), conductor wire end card (2) and hydraulic pressure tightener (3), the hydraulically extensible bar of hydraulic pressure tightener (3) is connected with conductor wire end card (2) mechanical fixation with back card (1) respectively, it is characterized in that: the die cavity of described back card (1) and the surface configuration of insulator steel cap are suitable, form the flange positioning spigot between steel cap maximum gauge and ball-and-socket; The centre of described conductor wire end card (2) is provided with a groove, and the shape of the shape of groove and duplex bowl head is suitable, the groove two sides have with duplex bowl head on the corresponding bolt via hole of bolt.

2. 750kV circuit charged for replacement conductor wire end insulator jig according to claim 1 is characterized in that: the back card main body (4) of described back card (1) and back are blocked the conductor wire end card main body (9) of loam cake (5), conductor wire end card (2) and renovated (10) material is titanium alloy TC 4.