CN201345512Y

CN201345512Y - 220KV double-circuit overhead tower-sharing circuit high-voltage strong-electric-field special tool

Info

Publication number: CN201345512Y
Application number: CNU2008201994743U
Authority: CN
Inventors: 聂新华
Original assignee: JIANGXI JIAN POWER SUPPLY Co Ltd
Current assignee: JIANGXI JIAN POWER SUPPLY Co Ltd; State Grid Corp of China SGCC
Priority date: 2008-12-11
Filing date: 2008-12-11
Publication date: 2009-11-11
Anticipated expiration: 2018-12-11

Abstract

The utility model discloses a special tool for a 220KV double-circuit common-tower line with high voltage and strong electric field, which comprises two pairs of fixed cards, guide rails, more than two pairs of mobile cards that can move along the guide rails, and an insulating ladder. The lower ends of the two pairs of fixed cards are respectively fixed on At both ends of the guide rail, the lower end of the mobile card is connected to the insulation ladder. The upper and lower ends of the fixed card are provided with mounting holes. The upper and lower ends of the mobile card are provided with upper and lower eye holes. Adopting the utility model to enter the strong electric field can maintain the combination gap requirements of equipotential personnel, and the human body can directly perform equipotential work on the insulating ladder without the need to board the wire, and the safety belt can be tied to the insulating ladder, and the backup protection rope is tied. On the tower, even if there is a disconnection accident, the human body can still stand stably on the insulating ladder, which has nothing to do with the disconnection, which fully guarantees the personal safety of the equipotential personnel during operation. The utility model has the advantages of simple structure, convenience and practicality, safety and reliability, and low cost, and is suitable for operation items within a 0.5m radius of equipotential operation of 220KV lines.

Description

The two tower circuit High Voltage electric field specific purpose tools altogether that return of 220KV

Technical field

The utility model relates to the two tower circuit High Voltage electric field specific purpose tools altogether that return of a kind of 220KV, belongs to transmission line equipotential live line working technical field.

Background technology

Up to now, China's transmission line operational method of entering 220KV circuit highfield generally has following several: 1, the equipotential personnel utilize the rope ladder method to enter highfield from the ground climbing; 2, the equipotential personnel enter highfield along the hard ladder of level insulation; 3, the equipotential personnel enter strain insulator shaft tower highfield along insulator string by the method for " stride two short three "; 4, the equipotential personnel take hanging basket and enter the straight line pole highfield; 5, the equipotential personnel utilize " parachuting method " to enter highfield.

Take above several method to enter 220KV circuit highfield, following shortcoming is arranged: 1, utilize the rope ladder method to enter highfield: utilizing this method to enter highfield, be applicable to all 220KV single loop shaft towers, is maximum method of using at present.But be not suitable for two returning with the tower circuit, because two times mostly are vertical arrangement greatly (as the fermented soya beans, salted or other wise type with tower circuit three-phase conducting wire, positive umbellate form, inversed umbrella type), enter, in during the phase conductor electric field, must be through lower wire, combinational gap is difficult to reach the requirement that 2.5m among the 8.3.3 of company's " electric power safety working regulation " circuit pack requirement nets in state when at first being the process lower wire, it is excessive that next is that personnel climb on more than the 30 meter high lead physical demands from ground, also be that the most important is at last, stipulate according to " live line working technology guide rule ", should not carry out the hanging ladder operation with the tower circuit two times, and rope ladder is hung on two returning with on the tower lead, against stipulating in " live line working technology guide rule ".Also have big crossover tower to be triangularly arranged, but big crossover tower cross-arm apart from the ground vertical range higher (exhale claim high for 50m and more than), it is unpractical from ground to the high-altitude of 50m that personnel climb rope ladder.2; enter highfield along the hard ladder of level insulation: take this method no matter be straight line pole or strain insulator shaft tower; all require hard terraced intensity high; and bending resistance is strong; particularly reach 5m and when above when cross-arm length; hard terraced length also need reach more than the 5m; equipotential personnel are when hard ladder is central; because the flexibility of insulating material; swing up and down greatlyyer, the equal potential working personnel are difficult to control balance, have the danger of falling; and human body enters in the process of strain insulator shaft tower electric field along the hard ladder of level; its combinational gap does not reach the requirement of 2.1m, because calculate with a string strain insulator string (14, total length is 2m) length deduction human body width (being about 40cm); its combinational gap is 1.6m; less than 2.1m,, must install the protection gap additional if adopt this method.3, method along insulator string enters strain insulator shaft tower highfield: adopt this method to enter highfield (using in Shanxi), its combinational gap does not reach the requirement of 2.1m, because human body (insulator in the supposition insulator string is qualified insulator) on insulator string needs three insulators of short circuit, its combinational gap is at 1.6m and following, if have null value or low resistance insulator in the insulator string, then good insulation sheet number is difficult to satisfy among the table 8-3 that state net company's " electric power safety working regulation " circuit pack requires 9 requirement in the insulator string, and this operational method is extremely dangerous.4, take hanging basket and enter the straight line pole highfield: take this method to enter highfield, it is many to reach the ground support staff on the required tower, and support staff and equipotential personnel are if cooperation is bad, and hanging basket is turned on one's side easily, cause personal falling accident, be absolutely unsafe.When on straight line pole, carrying out equal potential working, equipotential personnel can not be seated at operation on the lead, because the 220KV circuit mostly is single conductor or double bundle conductor greatly, human body is seated on the lead, because the height (being about 0.9m) of upper half of human body, will make the air gap of electrified body and cross-arm be contracted to 1.1m, not satisfy the requirement of 2.1m far away.At this moment, human body can only be seated at operation in the hanging basket, and human body operation in hanging basket will be very difficult.5, utilize " parachuting method " to enter highfield: this is a kind of novel technology, also exclude in the GB, adopt this method, require the lead phase spacing bigger, be mainly used in 500KV and above circuit, and 220KV line conductor phase spacing can not show a candle to the 500KV circuit, so it is when using, need the control of stabilizer pole, and higher to equipotential personnel and support staff's specification requirement, the load of bearing during equipotential personnel's operation is heavier, operates when being unfavorable for equipotential.

Summary of the invention

The purpose of this utility model is: provide a kind of simple in structure, convenient and practical, with low cost, can guarantee that the equipotential personnel enter the two specific purpose tools of tower circuit High Voltage electric fields altogether that return of 220KV of highfield safety operation.

The purpose of this utility model realizes by following scheme: comprise two pairs of fixed card, guide rail, can be along the mobile card and the insulating ladder that move on the guide rail more than two pairs, two pairs of fixed card lower ends are individually fixed in the guide rail two ends, move the card lower end and connect insulating ladder.

The utility model also comprises the operations chair that flexibly connects with the insulating ladder tail end.

Fixed card upper and lower side described in the utility model is provided with installing hole.Move the card upper and lower side and be provided with upper and lower eyelet.

Last eyelet buried bearing on the mobile card described in the utility model, and be connected on the guide rail moving to link with threading a needle.

Adopt the utility model to take to insulate method that slide or insulation pivoted arm ladder enter highfield; the combinational gap requirement that can keep the equipotential personnel; and human body can directly carry out equal potential working on insulating ladder; need not to climb up lead; its safety belt can lie on the insulating ladder; the backup protection rope lies on the shaft tower; effectively avoided above five kinds of methods to need safety belt is tied up on the lead; and reserve protection rope need tie up on the hanging ladder or on the shaft tower; if fall the accident that string causes lead to drop in case tool failure or insulator occur, human body just has the danger of falling or being torn by lead and cross-arm with lead.And safety belt is lain on the insulating ladder, the backup protection rope lies on the shaft tower, even the accident of going offline, human body still can be stablized and stand on the insulating ladder, with go offline irrelevant, the personal safety when fully having guaranteed equipotential personnel's operation.The utility model is simple in structure, convenient and practical, safe and reliable, with low cost, be applicable to that 220KV circuit equipotential operative radius is the events in operation in the 0.5m: as change suspension insulator string, change suspension clamp or wire clamp inspections of uncapping, change grading ring, change stockbridge damper, repairing lead on the lead between stockbridge damper and the suspension clamp, change operations such as jumper clamp, repairing wire jumper.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 moves card, insulating ladder and operations chair connecting relation schematic diagram for the utility model;

Fig. 3 is mobile card and the insulating ladder user mode schematic diagram of the utility model more than two pairs.

Embodiment

Below in conjunction with embodiment and contrast accompanying drawing the utility model is elaborated.

Present embodiment comprises two pairs of operations chairs 5 of making by Hot-dip zinc-coated flat steel sheet or steel alloy that fixed card 1, one are made insulating ladder 4 that metal exclusive guideway 2, two pairs can make along the mobile card 3 that moves on the guide rail 2, by the polyethylene epoxy resin insulation material by the rectangle steel alloy and flexibly connecting with insulating ladder 4 tail ends and made by metal frame and batten.Two pairs of fixed card 1 lower ends are individually fixed in guide rail 2 two ends by bolt, and fixed card 1 upper and lower side is provided with installing hole 11,12.Installing hole 11 is used for fixing card 1 upper end and is connected with cross-arm master material 6.Move card 3 lower ends and connect insulating ladder 4, move card 3 upper and lower sides and be provided with upper and

lower eyelet

21,22, last eyelet 21 buried bearings 23, and block 3 and be connected on the guide rail 2 mobile with threading a needle.

During use, at first fixed card is connected in cross-arm by the ground staff, it is vertically hung on shaft tower, and (hanging position of insulated sling must keep the air gap with 2.5 meters of live wires, to be insulated by earth potential personnel on the tower, (front end is installed on the cross-arm end to the firm hook of slide fixed card on the master of cross-arm lower floor material, be the yoke plate rear portion), and with the two ends set bolt metal part firmly is installed on the shaft tower cross-arm, remove lifting rope subsequently; The ground staff will connect insulating ladder and operations chair again, hang on the shaft tower cross-arm, and earth potential electric insulation ladder is installed on the active card of two pulleys on the tower, connects with bolt, removes insulated sling subsequently and gets final product.Also can be earlier the complete set slide that insulate be assembled by the ground staff, after hanging on the shaft tower cross-arm, cooperate the slide that to insulate firmly to be installed on the cross-arm by two electricians on the tower, take the method for this integral hoisting, insulated sling must hang on mobile jib or the main material, the ground staff should control tail rope well, and the metal guide rail two ends are kept and each phase line 2.1 meter ampere full distance.The earth potential electrician slide that will insulate moves to guide rail rear end (being the shaft tower side); equipotential electrician after fastening insulation backup protection rope on the shaft tower along insulating ladder down to the operations chair place; and seated (head should be contour with live wire); safety belt is lain on the insulating ladder; again by the earth potential electrician will insulate slide connect the people together average rate move to the lead side, equipotential electrician can carry out all kinds of equal potential workings on insulating ladder.

Claims

1, a kind of two specific purpose tool of tower circuit High Voltage electric field altogether that returns, it is characterized in that: comprise two pairs of fixed card (1), guide rail (2), two pairs of mobile card (3) and insulating ladders (4) that move with upper edge guide rail (2), two pairs of fixed card (1) lower end is individually fixed in guide rail (2) two ends, moves card (3) lower end and connects insulating ladder (4).

2, two specific purpose tool of tower circuit High Voltage electric field altogether that returns according to claim 1 is characterized in that: also comprise the operations chair (5) that flexibly connects with insulating ladder (4) tail end.

3, two specific purpose tool of tower circuit High Voltage electric field altogether that returns according to claim 1 and 2, it is characterized in that: fixed card (1) upper and lower side is provided with installing hole (11,12).

4, two specific purpose tool of tower circuit High Voltage electric field altogether that returns according to claim 1 and 2 is characterized in that: move card (3) upper and lower side and be provided with upper and lower eyelet (21,22).

5, two specific purpose tool of tower circuit High Voltage electric field altogether that returns according to claim 4 is characterized in that: move last eyelet (21) buried bearing (23) on the card (3), and be connected on the guide rail (2) moving card (3) with threading a needle.