CN109768486B - Live direct connection device and method for transformer substation outdoor beam 10kV isolating switch - Google Patents

Abstract

The invention relates to an electrified direct connection device of a transformer substation outdoor beam 10kV isolating switch, which comprises an operation platform and a direct connection hardware fitting, wherein the operation platform comprises an insulating ladder with an adjustable angle and an insulating ladder fixing device; but fixed insulating ladder prevents sinking fixing device on angle of adjustment's insulating ladder's the ladder foot, angle of adjustment's insulating ladder is the extension ladder, and the direct connection gold utensil is including the perpendicular reposition of redundant personnel line fixture of 10kV isolator that is used for the joint drainage line. A live direct connection method for a transformer substation outdoor beam 10kV isolating switch is characterized in that a power transformation intermediate potential method and a power distribution live working glove method are combined, live vertical direct connection is carried out on different current-level isolating switches of a 10kV outdoor beam, and shunt of the isolating switch is achieved. The invention abandons the traditional hot-line work mode and solves the problem of heating of the contact of the isolating switch on the on-site beam framework of the 10kV equipment.

Description

Live direct connection device and method for transformer substation outdoor beam 10kV isolating switch

Technical Field

The invention relates to live-line work of a power system, in particular to a live-line direct connection device and method for an outdoor beam 10kV isolating switch of a transformer substation.

Background

When the disconnecting switches with different voltage grades are put into operation in a power system transformer substation, the heating fault of the high-voltage disconnecting switch tends to rise along with the continuous increase of power supply load. This is a necessary result due to various factors such as poor contact of each connection part, product quality problems, poor installation process, improper operation and maintenance, inadequate overhaul, peak or overload operation, and the like, and if the connection parts are not processed in time, safe and reliable power supply is affected. The isolating switch of the existing transformer substation 66-220 kV generates heat and is currently an internal conventional project for transformer live-line work, live-line workers adopt an insulating ladder to build an operation platform to keep a safe distance of a corresponding voltage level, enter an operation point along the ladder climbing, and can eliminate the hidden danger of the isolating switch due to heating through the equal potential electrician's skillful skills and the corresponding shunt line fixture horizontal direct connection, so that precious maintenance planning time is created for multiple power supplies of enterprises.

When the existing live-line work tools, methods and technologies are applied to the heating live-line vertical direct-connection shunt of a disconnecting switch contact of a 66kV compact substation 10kV equipment site of the original rural power station of the Anshan power supply company, all the tools, methods and technologies are limited and even cannot work, and the reason is that the equipotential work cannot be carried out on a power line and electrical equipment with 20kV or below equipotential work level in the power safety work regulation power transformation part of the national grid company, so the equipotential work is strictly forbidden; although the ground potential operation method is adopted to meet the regulations of relevant terms of safe working rules, the original rural power bureau designs the transformer substation into a compact type in order to save resources of national soil stations, the interval of each loop is narrow, particularly, a 10kV isolating switch is designed and extruded on a beam which is 5.7 meters high above the ground outdoors, the interval distance of 300mm only meets the operation requirement, the emergency maintenance of live working is not considered at all, and the method is greatly related to the national general standard of power design. Although the ground potential operation method can be used for the field actual situation, when a bus arrester or a voltage transformer is arranged on a side phase framework, the vertical direct connection of the heating contact of the side phase A or C can only be simply processed, the operation of the side phase B cannot be performed, the task completion coefficient only accounts for about 33 percent, the whole operation process is very difficult, and various problems of polishing treatment of the contact surface of the drainage wire of the 10kV isolating switch, testing of a pincerlike ammeter, clamping progress of a shunt direct connection wire, occurrence of bus interphase short circuit or single-phase grounding short circuit accidents and the like exist, so that the ground potential is not suitable for implementation from the safety perspective of human bodies and equipment;

the intermediate potential operation method is that the human body is positioned between a grounding body and a charged body, and the insulating tool can be used for indirectly contacting the charged equipment at a short distance to achieve the purpose of overhauling, except for keeping the corresponding safe distance of 10kV voltage level. The intermediate potential operation method is mainly used for solving the problems that the equipment is complex and has certain dangerousness at the operation point. From the comparison of equipotential, ground potential and intermediate potential, the ground potential operation method is difficult to complete, the implementation is strictly forbidden by the equipotential operation method, and the intermediate potential operation method is the only method which is closest to complete the vertical direct connection task, but the premise is that an insulating operation platform, a special ground anchor for controlling the insulating operation platform, a special vertical shunt device and specific operation steps are required. The operation steps comprise a power transformation intermediate potential operation method and a power distribution live working glove method, and particularly a set of shunt line vertical direct connection method and a device matched with the power transformation intermediate potential operation method are required. Under the condition that all the above preconditions are met, the emergency live-line overhaul work can be carried out, otherwise, even under the same condition, the intermediate potential operation method is superior to the equipotential method and the ground potential method, the power distribution live-line operation glove method is not involved, the range of motion of the operating personnel is not strictly limited, a blocking measure is required if necessary, a specified minimum combined gap is ensured, the personal safety and the equipment safety cannot be ensured, the inter-phase short circuit of the bus or the single-phase grounding short circuit accident is easy to occur, and the safety and the stable operation of the power grid are greatly damaged. The electrified vertical direct connection method and the electrified vertical direct connection device for the isolating switch are key for solving the problem of equipment hidden danger and completing the task of vertical direct connection shunt work, so that the method and the device for clamping the vertical direct connection shunt line of the 10kV isolating switch are researched and developed, and the method and the device are imperative when the heating hidden danger of a contact point of the 10kV isolating switch of an outdoor beam of a transformer substation is electrified.

Disclosure of Invention

The invention aims to solve the technical problem of providing a live direct connection device and a live direct connection method for a transformer substation outdoor beam 10kV isolating switch, which can eliminate the heating hidden trouble of the isolating switch in real time, create precious maintenance planning time for multiple power supplies of an enterprise, improve the safety and reliability of live working and ensure the safe and stable operation of a power grid.

In order to achieve the purpose, the invention adopts the following technical scheme:

the live direct-connection device for the outdoor beam 10kV isolating switch of the transformer substation comprises an operating platform and a direct-connection hardware fitting, wherein the operating platform comprises an insulating ladder with an adjustable angle and an insulating ladder fixing device; but fixed insulating ladder fixing device on angle of adjustment's insulating ladder's the ladder foot, angle of adjustment's insulating ladder is the extension ladder, and the direct-connected fitting is including the perpendicular shunting line fixture of 10kV isolator that is used for the joint drainage line.

But angle of adjustment's insulating ladder, form by insulating double ladder and insulating extension ladder combination, insulating double ladder includes main ladder, branch ladder and ladder head frame plate, ladder head frame plate one end and main ladder fixed connection, the other end is articulated with a branch ladder, the articulated insulating extension ladder in middle part of ladder head frame plate, insulating extension ladder includes extension ladder fixed ladder, extension ladder slide and assembly pulley, connect through the lift pulley yoke between extension ladder fixed ladder and the extension ladder slide, the assembly pulley includes upper pulley subassembly and lower pulley assembly, upper pulley assembly fixes on the upper portion crossbeam of extension ladder fixed ladder, lower pulley assembly fixes on the lower part crossbeam of extension ladder slide, twine the haulage rope between upper pulley assembly and the lower pulley assembly, be equipped with the slip positioner between ladder head frame plate and the extension ladder slide, be equipped with extension ladder angle adjusting device between the lower part of extension ladder fixed ladder and the main ladder.

The sliding positioning device comprises a pin shell, a pull pin stop block and a pull pin head, wherein the pin shell is fixed on a ladder head frame plate through a bolt, a positioning hole is formed in the ladder head frame plate, a plurality of pin holes consistent with the positioning hole of the ladder head frame plate are formed in the extension ladder moving ladder, a long flat hole is formed in the pin shell, the pull pin penetrates through the long flat hole to be sleeved between the positioning holes of the ladder head frame plate and the extension ladder moving ladder, the pull pin stop block is arranged at the front end of the pull pin, and the pull pin head is arranged at the tail end of the pull pin and exposed outside the pin shell.

The lifting pulley frame comprises an upper lifting pulley frame and a lower lifting pulley frame which have the same structure, and the lifting pulley frame structurally comprises a main frame, wherein the main frame is divided into a closed frame and a pulley frame, and rollers are respectively arranged on two sides of the pulley frame; the inside of the closed frame of the upper lifting pulley frame is fixedly connected with the extension ladder, the roller of the pulley frame of the upper lifting pulley frame is in rolling connection with the extension ladder moving ladder, the inside of the closed frame of the lower lifting pulley frame is fixedly connected with the extension ladder moving ladder, and the roller of the pulley frame of the lower lifting pulley frame is in rolling connection with the extension ladder moving ladder.

The angle adjusting device of the telescopic ladder comprises a seat cover, a loop bar, an adjusting screw rod and a positioning nut, wherein the seat cover is fixedly connected to a cross beam at the bottom of the main ladder, the loop bar is sleeved inside the seat cover, an annular sliding groove is formed between the loop bar and the seat cover, a plurality of balls are arranged in the sliding groove, the front end of the loop bar is fixedly connected with the adjusting screw rod, the front end of the adjusting screw rod is in threaded connection with the positioning nut fixed on the cross beam of the telescopic ladder, and the tail end of the loop bar is a square seat.

The upper pulley assembly is two parallel pulleys, and the lower pulley assembly is 1 pulley.

The angle-adjustable insulating ladder further comprises a rotary driving device and a loop bar joint, wherein the rotary driving device is used for driving the loop bar to rotate.

Insulating ladder prevent sinking fixing device, including folding heavy board, terraced foot fixation clamp, tractive screw rod, the drill rod of fixing ground, two folding heavy boards of preventing pass through the articulated elements articulated, folding heavy board of preventing includes bottom plate and upper plate, and bottom plate and upper plate pass through the pivot articulated, are equipped with the strip slot hole on the upper plate, terraced foot fixation clamp wears to overlap in the strip slot hole for insulating terraced foot of centre gripping, a corner department of bottom plate is equipped with the pull rod seat, the tractive screw rod passes the upper plate and is connected with the pull rod seat, is equipped with pull rod nut on the tractive screw rod in the upper plate outside, the limit portion of bottom plate runs through the drill rod of fixing ground.

The ladder foot fixing clamp comprises a T-shaped adjusting screw rod, a ladder foot clamping plate I and a ladder foot clamping plate II, the ladder foot clamping plate I, the ladder foot clamping plate II and the T-shaped adjusting screw rod are connected through bolts, and adjusting nuts respectively located on two sides of the upper plate are arranged on the T-shaped adjusting screw rod.

The pull rod seat comprises an ear plate and a rod sleeve, the ear plate is fixed on the bottom plate, and the rod sleeve is hinged with the ear plate.

The hinged part comprises connecting plates and hinged shafts, the connecting plates are respectively connected with the bottom plates on the two sides, and the hinged shafts are hinged with the connecting plates.

10kV isolator perpendicular shunt lines fixture, including the fastener main part, conductive sliding block, the slider screw rod, the action bars connects, the annealed copper wire, connect the jackscrew, the fastener main part includes the base and the support arm of a body structure, be equipped with the slider screw rod on the base, the conductive sliding block of slider screw rod top swing joint, conductive sliding block passes through the slider screw rod and adjusts and slides from top to bottom, be equipped with the guide post on the conductive sliding block, be equipped with the slide on the support arm lateral wall, conductive sliding block slides in-process, the guide post slides in the slide all the time, one side of base is equipped with two screw holes that link up, threaded hole internal connection annealed copper wire connects, the annealed copper wire connects and the crimping of annealed copper wire, the.

And lantern rings are arranged at the top of the supporting arm and at the lower end of the sliding block screw rod.

The soft copper wire joint is fastened by a joint jackscrew.

The live direct connection method of the outdoor beam 10kV isolating switch of the transformer substation combines a power transformation intermediate potential method and a power distribution live working glove method, and the live vertical direct connection is carried out on the isolating switch with different current levels of the outdoor beam 10kV, so that the shunt of the isolating switch is realized, and the specific operation steps are as follows:

1) measuring the distance between a drainage wire between the isolating switch and a bus and the distance between the isolating switch and a drainage wire between the breaker on site, determining the length of a required shunt wire, manufacturing the shunt wire by using a soft copper wire on site, and connecting two ends of the soft copper wire with soft copper wire joints of a 10kV isolating switch vertical shunt wire clamp in a clamping manner to form a shunt clamp;

2) lifting an insulating ladder with adjustable angles to the position below an isolating switch of a circuit interval heating phase and standing on the ground, tying insulating control ropes, transmission ropes and hanging operating rods on the insulating ladder, drawing a traction rope to adjust the required height of the insulating extension ladder, positioning by a sliding positioning device, clamping a loop bar joint by using a rotary driving device, sleeving the loop bar joint on a square seat at the tail end of a loop bar, starting the rotary driving device, adjusting the required angles of the insulating extension ladder, and making point-line marks on four feet of the insulating herringbone ladder and the ground;

3) making point-line marks according to the ladder feet and the ground, placing an insulating ladder fixing device, inserting a fixing ground drill rod on the folding anti-sinking plate and nailing the fixing ground drill rod into the ground for fixing, and installing and fixing the ladder feet of the insulating ladder and the insulating ladder fixing device;

4) an electrician is operated to climb the ladder to the position below an operation point by wearing a complete set of power distribution insulating clothes, a safety belt is hung, a pulley is hung on a bus above a heating isolating switch, an insulating rope of the pulley is hung with a shunting clamp, and the shunting clamp is prepared for lifting;

5) polishing oxide layers of clamping points on the drainage wire between the isolating switch and the bus and the drainage wire between the isolating switch and the breaker;

6) the electrical engineering on the ladder and the ground operation are matched to lift the shunt clamp, the upper clamp is clamped on the drainage line between the isolating switch and the bus, and the lower clamp is clamped on the drainage line between the isolating switch and the breaker;

7) operating a 10kV high-voltage pincerlike ammeter for an electrician, respectively pushing an instrument guide area into a drainage wire and a shunt wire, respectively withdrawing the instrument guide area from the drainage wire and the shunt wire after instrument data storage is finished, and checking instrument storage data;

8) after the stored data of the instrument is confirmed to be qualified, the auxiliary tool for drawing and shunting the fixture is removed; the electrician is operated to open the safety belt and return along the original path;

9) and withdrawing the insulating ladder with the adjustable angle, pulling out the fixed ground drill rod, arranging the tool and finishing the installation.

Compared with the prior art, the invention has the beneficial effects that:

1) the middle potential operation method and the power distribution glove operation method are that a human body is positioned between a grounding body and a charged body, and outside a safe distance of keeping a corresponding voltage level, an insulating tool can be used for indirectly contacting with charged equipment at a short distance to achieve the purpose of overhauling. An intermediate potential operation method and a power distribution glove operation method are selected to mainly solve the problems that the equipment of an operation point is complex and the ground potential operation method is difficult to finish. The defects in the prior art are overcome, the traditional hot-line work mode is abandoned, and the problem of heating of the contact of the isolating switch on the site beam framework of the 10kV equipment is solved.

2) The matched shunt lines can be manufactured on site according to the lengths of six hanging points of ABC three phases of actual line load current, the cross sections and the number of the shunt lines are increased or decreased along with the actually measured current, the shunt lines can be loosened and raised according to the section of the wires in summer and winter in the local area, the tightness of expansion caused by heat and contraction caused by cold of the wires in summer and winter is reserved, the shunt lines are prevented from being pulled apart, accidents caused by accidents of emergency treatment equipment are avoided, after the 10kV isolating switch vertical shunt line clamp device is well fixed, a substation operator on duty does not need to regularly and irregularly visit and monitor, the shunt line clamp device can be safely and reliably operated to an overhaul plan, the device is detached in case of power failure, the installation and detachment are convenient, the operation is rapid, and the.

3) The invention is not limited by copper-aluminum wires, and can meet the use requirement of a 70-240 mm copper-aluminum wire section connected with a 10kV isolating switch. The insulating ladder is not limited by seasons, is suitable for various types of places, and can meet the requirement of the insulating ladder on firmness in a 10kV equipment live emergency repair site. On the other hand, the ladder tail does not need to be manually controlled and fixed by operators, the assembled insulating ladder can be reliably lifted and descended and the angle of the assembled insulating ladder can be adjusted, the mounting and the dismounting are convenient, and the operation is fast.

4) The contact heating vertical direct connection requirement of the outdoor 10kV equipment field isolating switch of the 66kV transformer substation is met, the performance of the contact heating vertical direct connection requirement accords with safety regulations and relevant professional standard regulations, the practicability is high, the installation and the disassembly are convenient, and the operation is rapid.

Drawings

Fig. 1 is a schematic structural diagram of an operating platform according to the present invention.

Fig. 2 is a schematic view of a direct link hardware of the present invention.

Fig. 3 is a schematic structural view of an insulation ladder with adjustable angle.

Fig. 4 is a schematic structural view of the lip ladder.

Fig. 5 is a structural side view of the lip ladder.

Fig. 6 is a schematic structural view of the slide positioning device.

Figure 7 is a side view of the slide positioning device.

Fig. 8 is a schematic structural view of the lifting pulley yoke.

Fig. 9 is a schematic structural view of the telescopic ladder angle adjusting device.

Fig. 10 is a partially enlarged view of fig. 9.

Fig. 11 is a schematic structural view of a loop bar joint.

Fig. 12 is a schematic structural view of the insulating ladder fixing device.

Fig. 13 is a structural side view of the insulation ladder fixing device.

Fig. 14 is a structural rear view of the insulation ladder fixing device.

Fig. 15 is a structural view of a ladder foot fixing clip.

Fig. 16 is a structural view of the lever base.

Fig. 17 is a schematic structural diagram of a 10kV disconnector vertical shunt line clamp.

Fig. 18 is a structural side view of a 10kV disconnector vertical shunt line clamp.

In the figure: the device comprises an insulating ladder 1 with an adjustable angle, an insulating ladder fixing device 2, a 10kV isolating switch vertical shunt wire fixture 3, an isolating switch to bus drainage wire 4, an isolating switch to breaker drainage wire 5;

the ladder comprises an insulating herringbone ladder 11, an insulating extension ladder 12, a main ladder 13, a support ladder 14, a ladder head frame plate 15, an extension ladder fixed ladder 16, an extension ladder movable ladder 17, a lifting pulley frame 18, an upper pulley assembly 19, a lower pulley assembly 110, a traction rope 111, a sliding positioning device 112, an extension ladder angle adjusting device 113, a pin shell 114, a pull pin 115, a stop block 116, a limit plate 117, a T-shaped limit hole 118, a main frame 119, a closed frame 120, a pulley frame 121, two rollers 122, a seat sleeve 123, a loop bar 124, an adjusting screw 125, a positioning nut 126, a sliding chute 127, balls 128, a ball inlet 129, a square seat 130, a loop bar joint 131, a loop bar joint bar 132 and a loop bar joint sleeve 133.

The folding anti-sinking plate 21, the ladder foot fixing clamp 22, the pull rod seat 23, the pulling screw rod 24, the fixed ground anchor 25, the hinge 26, the bottom plate 27, the upper plate 28, the strip-shaped long hole 29, the pull rod nut 210, the T-shaped adjusting screw rod 211, the ladder foot clamping plate I212, the ladder foot clamping plate II 213, the ear plate 214, the rod sleeve 215, the connecting plate 216 and the hinge shaft 217.

The cable clamp comprises a cable clamp body 31, a conductive slider 32, a slider screw 33, an operating rod connector 34, a soft copper wire connector 35, a soft copper wire 36, a connector jackscrew 37, a base 38, a supporting arm 39, a guide column 310, a slideway 311, a threaded hole 312, an operating rod connector 313 and a collar 314.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1-18, the live direct-connection device of the transformer substation outdoor beam 10kV disconnecting switch comprises an operation platform and a direct-connection hardware fitting, wherein the operation platform comprises an insulation ladder 1 with an adjustable angle and an insulation ladder fixing device 2; but fixed insulating ladder fixing device 2 on angle of adjustment's insulating ladder 1's the ladder foot, but angle of adjustment's insulating ladder 2 is the extension ladder, and the direct-connected fitting is including the perpendicular shunting line fixture 3 of 10kV isolator that is used for joint drainage line.

But angle of adjustment's insulating ladder, the whole ladder of insulating ladder is formed by insulating double ladder 11 and the combination of insulating extension ladder 12, and insulating double ladder 11 includes main ladder 13, a ladder 14 and terraced head frame plate 15, and 15 one ends of terraced head frame plate are with main ladder 13 fixed connection, and the other end is articulated with a ladder 14, and the articulated insulating extension ladder 2 in middle part of terraced head frame plate 15.

The insulating extension ladder 12 comprises an extension ladder fixed ladder 16, an extension ladder movable ladder 17 and pulley blocks, the extension ladder fixed ladder 16 is connected with the extension ladder movable ladder 17 through a lifting pulley yoke 18, the lifting pulley yoke 18 comprises an upper lifting pulley yoke and a lower lifting pulley yoke which have the same structure, the structure of the insulating extension ladder comprises a main frame 119, the main frame 119 is divided into a closed frame 120 and a pulley frame 121, and two sides of the pulley frame 121 are respectively provided with a roller 122; the inside of the closed frame 120 of the upper lifting pulley frame is fixedly connected with the extension ladder fixed ladder 16, the roller 122 of the pulley frame 121 of the upper lifting pulley frame is in rolling connection with the extension ladder movable ladder 17, the inside of the closed frame 120 of the lower lifting pulley frame is fixedly connected with the extension ladder movable ladder 17, and the roller 122 of the pulley frame 121 of the lower lifting pulley frame is in rolling connection with the extension ladder fixed ladder.

The pulley block comprises an upper pulley block 19 and a lower pulley block 110, the upper pulley block 19 is fixed on an upper cross beam of the fixed ladder 16 of the extension ladder, the lower pulley block 110 is fixed on a lower cross beam of the movable ladder 17 of the extension ladder, the upper pulley block 19 is two parallel pulleys, and the lower pulley block 110 is 1 pulley. A traction rope 111 is wound between the upper pulley assembly 19 and the lower pulley assembly 110, one end of the traction rope 111 is fixed on a cross beam where the lower pulley assembly 110 is located, and the traction rope 111 upwards passes around one pulley in the upper pulley assembly 19, then downwards passes around the pulley in the lower pulley assembly 110, and then upwards passes around the other pulley in the upper pulley assembly 19 and hangs down to serve as a traction end. The extension ladder moving ladder 17 is drawn by a drawing rope 111 to reach the required height. A sliding positioning device 112 is arranged between the ladder head frame plate 15 and the extension ladder moving ladder 17 to determine the height position of the extension ladder moving ladder 17.

The sliding positioning device 112 comprises a pin shell 114, a pulling pin 115, a pulling pin stopper 117 and a pulling pin head 116, wherein the pin shell 114 is fixed on the ladder head frame plate 15 through a bolt, a positioning hole is formed in the ladder head frame plate 15, a plurality of pin holes consistent with the positioning hole of the ladder head frame plate are formed in the extension ladder moving ladder 17, a long flat hole 118 is formed in the pin shell 114, the pulling pin 115 penetrates through the long flat hole 118 and is sleeved between the positioning holes of the ladder head frame plate 15 and the extension ladder moving ladder 17, the pulling pin stopper 117 is arranged at the front end of the pulling pin 115, the pulling pin head 116 is arranged at the tail end of the pulling pin 115 and is exposed outside the pin shell, when the extension ladder moving ladder 17 is positioned, the pulling pin 115 is inserted into the inner side of the extension ladder moving ladder 17, the inner surface of the pulling pin head 116 abuts against the outer surface of the pin shell 114, and when the extension ladder moving ladder.

An extension ladder angle adjusting device 113 is arranged between the lower part of the extension ladder fixing ladder 16 and the main ladder 13. Telescopic ladder angle adjusting device 113, including seat cover 123, loop bar 124, adjusting screw 125, set nut 126, seat cover 123 fixed connection is on the crossbeam of main ladder 3 bottom, loop bar 124 cover is established inside seat cover 123, be equipped with annular spout 127 between loop bar 124 and the seat cover 123, be equipped with a plurality of ball 128 in the spout 127, be equipped with ball entry 129 on the seat cover 23, loop bar 124 front end and adjusting screw 125 fixed connection, adjusting screw 125's front end and the set nut 126 bolt joint of fixing on telescopic ladder fixed ladder 16 crossbeam, the tail end of loop bar 124 is square seat 130.

The angle-adjustable insulating ladder further comprises a rotary driving device for driving the loop bar to rotate and a loop bar joint 131. The lever adapter 131 includes a lever adapter rod 132 and a lever adapter sleeve 133, the lever adapter sleeve 133 mating with the aft square seat 130 of the lever 124. The rotary drive device comprises an electric hand drill. The electric hand drill clamps the sleeve rod joint 131 and is sleeved at the tail end of the sleeve rod 124, the electric hand drill is started, the sleeve rod 124 is driven to rotate, and therefore the angle of the insulating telescopic ladder 12 is adjusted. The angle of adjustment of the insulating extension ladder 12 is 0-50 °.

Insulating ladder prevents heavy fixing device, including folding heavy board 21, ladder foot fixation clamp 22, pull rod seat 23, tractive screw rod 24, fixed ground borer 25, two folding heavy boards 21 are articulated through articulated elements 26, and folding heavy board 21 includes bottom plate 27 and upper plate 28, and bottom plate 27 and upper plate 28 pass through the pivot articulated, are equipped with strip slot hole 29 on the upper plate 28, ladder foot fixation clamp 22 wears to overlap in strip slot hole 29 for the insulating ladder foot of centre gripping, and a corner department of bottom plate 27 is equipped with pull rod seat 23, tractive screw rod 24 passes upper plate 28 and is connected with pull rod seat 23, is equipped with pull rod nut 210 on the tractive screw rod 24 in the upper plate 28 outside, and the limit portion of bottom plate 27 runs through fixed ground borer 25.

Ladder foot fixation clamp 22 include that T shape adjusts screw 211, ladder foot splint 212, ladder foot splint 213, pass through bolted connection between ladder foot splint 212 and the ladder foot splint 213 and the T shape adjusts screw 211, be equipped with the adjusting nut that is located upper plate 28 both sides respectively on the T shape adjusts the screw 211.

The pull rod seat 23 comprises an ear plate 214 and a rod sleeve 215, the ear plate 214 is fixed on the bottom plate 27, and the rod sleeve 215 is hinged with the ear plate 214.

The hinge 26 comprises a connecting plate 216 and a hinge shaft 217, wherein the connecting plate 216 is respectively connected with the bottom plates 27 at two sides, and the hinge shaft 217 is hinged with the connecting plate 216.

10kV isolator perpendicular shunt lines fixture, including fastener main part 31, electrically conductive slider 32, slider screw 33, the action bars connects 34, annealed copper wire connects 35, annealed copper wire 36, connect jackscrew 37, fastener main part 31 includes base 38 and the support arm 39 of an organic whole structure, be equipped with slider screw 33 on the base 38, the electrically conductive slider 32 of slider screw 33 top swing joint, electrically conductive slider passes through slider screw to be adjusted and slides from top to bottom, be equipped with guide post 310 on the electrically conductive slider 32, be equipped with slide 311 on the support arm 39 lateral wall, electrically conductive slider 32 slip in-process, guide post 310 slides in slide 311 all the time, one side of base 38 is equipped with two screw holes 312 that link up, threaded hole 312 in-connection annealed copper wire connects 35, annealed copper wire connects 35 and annealed copper wire 36 crimping, annealed copper wire connects 35 by connecting jackscrew 37 fastening. The other side of the base 38 is bolted to the lever joint 313. An angle of 5-20 degrees is formed between the operating rod joint 34 and the vertical direction, and a positioning pin 317 is arranged on the connecting column 316. The operating rod joint 34 is connected with the operating rod for auxiliary clamping operation, has a certain angle and ensures the safety of operation.

The top of the support arm 39 and the lower end of the slider screw 33 are both provided with a collar 314. A collar 314 on the top of the support arm 39 is used to hook the bus bar during operation, and a collar 314 on the lower end of the slider screw 33 is used to secure the conductive slider 32 with a wrench tool.

The live direct connection method of the outdoor beam 10kV isolating switch of the transformer substation combines a power transformation intermediate potential method and a power distribution live working glove method, and the live vertical direct connection is carried out on the isolating switch with different current levels of the outdoor beam 10kV, so that the shunt of the isolating switch is realized, and the specific operation steps are as follows:

1) before direct connection, the names of circuit intervals and the phases of isolating switches must be checked, the consistency of emergency repair instructions sent by production scheduling is determined, the distances between a drainage wire between an isolating switch and a bus and between an isolating switch and a drainage wire between a circuit breaker are measured on site, the length of a required shunt wire is determined, the cross section area and the number of the shunt wires are determined to be matched with seasonal load current, the shunt wire is manufactured on site by using a soft copper wire, and two ends of the soft copper wire are respectively connected with soft copper wire joints of a 10kV isolating switch vertical shunt wire clamp in a clamping and pressing manner to form a shunt clamp;

2) assembling an insulating herringbone ladder and an insulating extension ladder on the ground, wherein the insulating ladder is integrally formed after the insulating herringbone ladder is assembled, a control rope, an endless rope sleeve, a pulley and a transmission rope are respectively tied and hung at the ladder head and the ladder waist, the insulating ladder is lifted to the position below an isolation switch of a loop interval heating phase and is erected on the ground, the height of the insulating extension ladder in the middle of the insulating herringbone ladder is adjusted and lifted by a pulley block, a loop bar joint is clamped by an electric hand drill, the loop bar joint is sleeved on a square seat at the tail end of a loop bar, the electric hand drill is started, the required angle of the insulating extension ladder is adjusted, the inclination angle of the insulating extension ladder meets the requirement of an operation platform, the control ropes on the ladder head and the ladder waist are fixedly locked, and a worker is responsible for visually checking whether an upper channel and a lower channel of an operation electrician and;

3) after the work responsible person determines that the insulating ladder meets the requirements, a ground electrician makes point-line marks on the four leg footings of the insulating herringbone ladder and the ground, opens the control rope of the whole ladder and moves the control rope to a proper position adjacent to the control rope, and the control rope is supported by a ground electrician specially-assigned person to prevent the ladder from falling.

4) The ground electrician opens the two insulating ladder fixing devices, makes point-line marks according to ladder feet and the ground, places the marks at specified positions respectively, inserts a fixed ground drill rod on the folding anti-sinking plate, and strikes the top end with a hammer until all fixing pins are driven into the ground.

5) The insulating ladder is moved to the fixed insulating ladder fixing device to be connected with ladder feet of the insulating ladder and fixed by positioning bolts.

6) When the ladder feet of the insulating ladder need to be finely adjusted, the T-shaped adjusting screw rod on the strip hole of the sliding upper plate and the nuts on the inner side and the outer side of the screw thread are arranged, and the four feet of the insulating ladder can finish the movement of 0-10 mm in the vertical direction and the horizontal direction when the anti-sinking plate is used. The T-shaped adjusting screw and the ladder foot fixing clamp can deflect in a range of 0-180 degrees around the bolt, and adjustment of 0-30 degrees in actual work is met.

7) It is worth noting that: the fixed ground nailed into the ground is divided into 3 types of short, medium and long, which are respectively suitable for different seasons and different ground surfaces, and the depth of the socket hole matched with the size is not less than 230mm (short, hard), 290mm (moderate, not loose and not hard) and 400mm (long, soft).

8) When the ground is hard, the top end of the short fixing drill rod is hit by a hammer until the fixing pin is completely driven into the ground.

9) If the ground is not hard and soft, the top end of the medium-fixed drill rod is hit by a hammer until the fixing pin is completely driven into the ground.

10) If the ground is a road plate brick, after the mark is made, the corresponding road plate brick is removed, a long drill rod is used according to the loose and hard degree of the ground, and the top end of the fixed ground drill rod with the selected fixed length is hit by a hammer until all fixing pins are nailed into the ground.

11) When all the corresponding ladder feet are firmly connected with the ground and the insulating control ropes are fixedly locked, the ladder climbing operation of hot-line work personnel can be carried out, and particularly, the safety ropes are tied on the ladder feet of the herringbone ladder and the insulating extension ladder to prevent the angle adjusting device of the extension ladder from deforming and causing safety accidents.

12) An operator wears a complete set of electrical distribution insulating clothing (including; clothes, trousers, boots, caps and gloves) climb along the insulating ladder, prevent violence to cut and rub in the process of the upper and lower insulating ladders strictly, damage the insulating clothes, on the way, at the intersection of the herringbone ladder and the extension ladder, after the pulling pin of the slide positioning device of the ladder head frame plates at the two sides of the ladder body is locked, climb to the lower part of an operation point, hang a safety belt, pass through a pulley of a pulley by an insulating ram and an insulating rope which are transmitted by an electrician on the ground by hands, smooth the insulating ram and the insulating rope together, hang the pulley on a bus above the heating isolating switch, and then the electrician operates to transmit the insulating ram to the ground immediately.

13) The two ground electricians should paint vaseline on the shunt clamp to prevent the screw from being oxidized, and the number and the section of the shunt lines can be determined according to seasonal load current recorded by a transformer substation.

14) After two ground electricians finish installing the reposition of redundant personnel fixture, adjust two fixture openings respectively maximumly, scribble vaseline in the opening inside, install long insulating handrail on last fixture action bars joint. And installing a short insulating holding rod on the lower fixture operating rod joint to ensure that the operating rod joint and the holding rod are well fixed.

15) One end of an insulating rope hung on a tackle above a bus is bound on an upper fixture lantern ring by a ground electrician, the other end of the insulating rope is controlled by the ground electrician, the insulating rope penetrates through a lower fixture lantern ring, two rope heads are smoothed out in order, and shunt line lifting control preparation is made.

16) Ground electrician is with hanging the insulating rope one end at the generating line top coaster, the ligature is on last fixture lantern ring, insulating rope tail end can have three kinds of remaining modes according to the site conditions, firstly insulating rope tail end stays in the adjacent side of last fixture lantern ring, adopt insulating action bars to detain in the air or ground, secondly insulating rope tail end stays in the adjacent side of operation electrician, operation electrician uses hand tractive to detain, secondly insulating rope tail end stays on ground tarpaulin, ground electrician uses hand tractive to detain, for convenient and fast, this operation mode adopts the second kind.

17) When a ground electrician prepares to work in a vertical direct connection mode according to the steps, the ground electrician prepares to polish the insulating rod and transmits the insulating rod to the operation electrician, and oxide layers are removed from the upper end and the lower end of a drainage line for hanging a shunt line, so that good contact, firmness and reliability of a clamp are guaranteed.

18) When the polishing insulating rod is used, the distance is polished as required, the middle rod for the drainage wire at the upper end is polished, the short rod for the lower end is polished, and the long rod and the short rod are combined into a whole to form a long rod.

19) When an operator polishes, when the angle of the insulating operating rod grinding head is not consistent with that of the drainage wire, the angle of the grinding rod grinding head is adjusted, and the grinding can be completed by locking, so that the hanging part of the clamp meets the requirement of vertical direct connection.

20) After the lifting instruction is given, the ground electrician who goes up the insulating rope of fixture lantern ring in a control operates at the uniform velocity, and the ground electrician who goes up the insulating rope of fixture lantern ring under a control is the elasticity cooperation thereupon, and the handheld insulating ram of another ground electrician is the backup at any time and is propped up, draws, drags, pushes up, keeps off the cooperation to prevent that the shunt line promotes the in-process swing and causes ground connection or short circuit.

21) When the opening of the lifted upper end fixture is adjacent to the side of the drainage wire, an operator grasps the insulating holding rod at the upper end of the fixture by two hands, aligns the opening of the fixture with the oxidation removing layer of the drainage wire and hangs the opening of the fixture with the oxidation removing layer of the drainage wire, and grasps the insulating holding rod at the lower end of the fixture by two hands to hang the opening of the fixture with the oxidation removing layer of the drainage wire.

22) A ground electrician transmits upper shunt line fixture fastening insulator spindle, and operating personnel grasps and locks the slider screw rod of upper and lower fixture with the fastening insulator spindle with both hands.

23) After the opening of the clamping device is firmly and reliably contacted with the drainage wire, an operator transmits the fastening insulating rod and the insulating holding rod to the ground.

24) It is worth noting that the tightness of the overall length of the upper and lower vertical direct-connection shunt lines is determined according to unit shortage plan and season conditions, the tightness of the overall length is pulled tightly in a short period and in spring, summer and autumn, but redundancy is reserved in winter to prevent the shunt lines and the isolating switches from being pulled off, so that inter-phase short circuit and single-phase grounding are caused.

25) An operator receives a special 10kV high-voltage pincerlike ammeter transmitted by a ground electrician, an insulating rod joint is opened, only the first section of the 10kV multiplied by 1 meter multiplied by 5 sections is reserved, the rest sections are reserved and controlled by the ground electrician, the operator holds the insulating rod to push the instrument guide area into the drainage wire and the shunt wire respectively, waiting for a while, the instrument stores data completely, the instrument guide area withdraws from the drainage wire and the shunt wire respectively, the stored data of the instrument is read and compared to determine whether the stored data is qualified, if the stored data is not qualified, relevant problems are searched, the problems are solved in time, if the stored data is qualified, the number of the sections of the operating rod is recovered, the operating rod is removed from the ground by the ground electrician.

26) An operator pulls the upper fixture lantern ring by hands to be reserved on the adjacent insulating rope, unlocks the insulating rope buckle of the upper fixture lantern ring, and slowly pulls the upper fixture lantern ring after the ground electrician is cooperatively pulled tightly, so that the whole insulating rope is pulled onto the ground tarpaulin from the upper fixture lantern ring to the bus pulley. If the end of the insulating rope falls in the air and hangs or winds the upper drainage wire and the lower drainage wire of the isolating switch, the insulating rod is adopted for matching treatment when hard dragging by force is strictly forbidden.

27) An operator receives an insulating ram transmitted on the ground, picks up a pulley on a bus, slides down the insulating ram in two hands to be transmitted to an electrician on the ground, opens a safety belt hook, returns along the original path, and pulls out a pin pulling lock pin of a sliding positioning device of ladder head frame plates on two sides of a ladder body to reach the ground after pulling out the pin pulling lock pin at the intersection of the herringbone ladder and the extension ladder.

28) The ground electrician can fall the insulating extension ladder normal position, opens all insulating control ropes in ground and controls well, demolishs two insulating ladder fixing device bolts, according to operating procedure, falls insulating ladder on ground tarpaulin, arranges the work area instrument loading after, and the 10kV equipment operation scene of withdrawing from in the queue.

The foregoing is considered as illustrative only of the principles of the invention and is not to be in any way limiting, since all equivalent changes and modifications are intended to be included within the scope of the appended claims.

Claims (4)

1. The live direct-connection device of the transformer substation outdoor beam 10kV isolating switch is characterized by comprising an operating platform and a direct-connection hardware fitting, wherein the operating platform comprises an insulating ladder with an adjustable angle and an insulating ladder fixing device; an insulating ladder fixing device is fixed on ladder legs of an insulating ladder with an adjustable angle, the insulating ladder with the adjustable angle is a telescopic ladder, and a direct-connection hardware fitting comprises a 10kV isolating switch vertical shunt line clamp for clamping a drainage line;

an insulating ladder with adjustable angles is formed by combining an insulating herringbone ladder and an insulating telescopic ladder, wherein the insulating herringbone ladder comprises a main ladder, a branch ladder and a ladder head frame plate, one end of the ladder head frame plate is fixedly connected with the main ladder, the other end of the ladder head frame plate is hinged with the branch ladder, the middle part of the ladder head frame plate is hinged with the insulating telescopic ladder, the insulating telescopic ladder comprises a telescopic ladder fixed ladder, a telescopic ladder movable ladder and a pulley block, the telescopic ladder fixed ladder and the telescopic ladder movable ladder are connected through a lifting pulley frame, the pulley block comprises an upper pulley assembly and a lower pulley assembly, the upper pulley assembly is fixed on an upper cross beam of the telescopic ladder fixed ladder, the lower pulley assembly is fixed on a lower cross beam of the telescopic ladder movable ladder, a traction rope is wound between the upper pulley assembly and the lower pulley assembly, a sliding positioning device is arranged between the ladder head frame plate and the telescopic ladder movable ladder, and a telescopic ladder;

the sliding positioning device comprises a pin shell, a pulling pin stop block and a pulling pin head, wherein the pin shell is fixed on the ladder head frame plate through a bolt, the ladder head frame plate is provided with a positioning hole, the extension ladder moving ladder is provided with a plurality of pin holes consistent with the positioning hole of the ladder head frame plate, the pin shell is provided with a long flat hole, the pulling pin is sleeved between the ladder head frame plate and the positioning hole of the extension ladder moving ladder through the long flat hole, the front end of the pulling pin is provided with the pulling pin stop block, and the tail end of the pulling pin is provided with the pulling pin head which is exposed outside the pin shell;

the lifting pulley yoke comprises an upper lifting pulley yoke and a lower lifting pulley yoke which have the same structure, and the lifting pulley yoke structurally comprises a main frame, wherein the main frame is divided into a closed frame and a pulley frame, and rollers are respectively arranged on two sides of the pulley frame; the inside of the closed frame of the upper lifting pulley frame is fixedly connected with a fixed ladder of the extension ladder, the roller of the pulley frame of the upper lifting pulley frame is in rolling connection with a movable ladder of the extension ladder, the inside of the closed frame of the lower lifting pulley frame is fixedly connected with the movable ladder of the extension ladder, and the roller of the pulley frame of the lower lifting pulley frame is in rolling connection with the fixed ladder of the extension ladder;

the insulating ladder fixing device comprises folding anti-sinking plates, ladder leg fixing clamps, a drawing screw rod and a fixing ground drill rod, wherein the two folding anti-sinking plates are hinged through a hinge piece, each folding anti-sinking plate comprises a bottom plate and an upper plate, the bottom plate and the upper plate are hinged through a shaft pin, a strip-shaped long hole is formed in the upper plate, the ladder leg fixing clamps are sleeved in the strip-shaped long holes in a penetrating mode and used for clamping insulating ladder legs, a pull rod seat is arranged at one edge of the bottom plate, the drawing screw rod penetrates through the upper plate and is connected with the pull rod seat, a pull rod nut is arranged on the drawing screw rod on the outer side of the upper plate;

the angle adjusting device of the telescopic ladder comprises a seat cover, a loop bar, an adjusting screw rod and a positioning nut, wherein the seat cover is fixedly connected to a cross beam at the bottom of a main ladder;

the ladder foot fixing clamp comprises a T-shaped adjusting screw rod, a ladder foot clamping plate I and a ladder foot clamping plate II, the ladder foot clamping plate I, the ladder foot clamping plate II and the T-shaped adjusting screw rod are connected through bolts, and adjusting nuts respectively located on two sides of the upper plate are arranged on the T-shaped adjusting screw rod.

2. The live direct-connection device of the substation outdoor beam 10kV isolating switch according to claim 1, wherein the angle-adjustable insulating ladder further comprises a rotary driving device and a loop bar joint, wherein the rotary driving device is used for driving a loop bar of the telescopic ladder angle adjusting device to rotate.

3. The electrified direct-connection device of the outdoor crossbeam 10kV isolating switch of transformer substation of claim 1, characterized in that, 10kV isolating switch perpendicular shunt line fixture, including fastener main part, electrically conductive slider, the slider screw rod, the action bars connects, the annealed copper wire, connect the jackscrew, the fastener main part includes the base and the support arm of integrative structure, be equipped with the slider screw rod on the base, slider screw rod top swing joint electrically conductive slider, electrically conductive slider passes through the slider screw rod and adjusts and slides from top to bottom, be equipped with the guide post on the electrically conductive slider, be equipped with the slide on the support arm lateral wall, electrically conductive slider slides in-process, the guide post slides in the slide all the time, one side of base is equipped with two screw holes that link up, the annealed copper wire connects in the screw hole, the annealed copper wire connects with the annealed copper wire crimping, the.

4. The electrified direct connection method of the outdoor beam 10kV isolating switch of the transformer substation is characterized in that a potential method in the middle of power transformation is combined with a power distribution live working glove method, a human body is located between a grounding body and an electrified body, the safe distance of the corresponding voltage level is kept, an insulating tool is used in a close range to indirectly contact with an electrified device, the electrified vertical direct connection is carried out on the isolating switch with different current levels of the outdoor beam 10kV, the shunt of the isolating switch is realized, and the specific operation steps are as follows:

1) measuring the distance between a drainage wire between an isolating switch and a bus and the distance between the isolating switch and a drainage wire between a circuit breaker on site, determining the length of a required shunt wire, manufacturing the shunt wire on site by using a soft copper wire, manufacturing matched shunt wires on site according to the lengths of six hanging points of ABC three phases and the load current of an actual line, increasing or reducing the number of the cross sections and the number of the shunt wires along with the measured current, reserving the tightness of thermal expansion and cold contraction of the wires in summer and winter according to the loosening and rising amplitude of the wires in summer and winter of a local area, and connecting two ends of the soft copper wire with soft copper wire joints of a 10kV isolating switch vertical shunt wire respectively in a clamping manner to form a shunt clamp;

2) lifting an insulating ladder with adjustable angles to the position below an isolating switch of a circuit interval heating phase and standing on the ground, tying insulating control ropes, transmission ropes and hanging operating rods on the insulating ladder, drawing a traction rope to adjust the required height of the insulating extension ladder, positioning by a sliding positioning device, clamping a loop bar joint by using a rotary driving device, sleeving the loop bar joint on a square seat at the tail end of a loop bar, starting the rotary driving device, adjusting the required angles of the insulating extension ladder, and making point-line marks on four feet of the insulating herringbone ladder and the ground;

3) making point-line marks according to the ladder feet and the ground, placing an insulating ladder fixing device, inserting a fixing ground drill rod on the folding anti-sinking plate and nailing the fixing ground drill rod into the ground for fixing, and installing and fixing the ladder feet of the insulating ladder and the insulating ladder fixing device;

4) an electrician is operated to climb the ladder to the position below an operation point by wearing a complete set of power distribution insulating clothes, a safety belt is hung, a pulley is hung on a bus above a heating isolating switch, an insulating rope of the pulley is hung with a shunting clamp, and the shunting clamp is prepared for lifting;

5) polishing oxide layers of clamping points on the drainage wire between the isolating switch and the bus and the drainage wire between the isolating switch and the breaker;

6) the electrical engineering on the ladder and the ground operation are matched to lift the shunt clamp, the upper clamp is clamped on the drainage line between the isolating switch and the bus, and the lower clamp is clamped on the drainage line between the isolating switch and the breaker;

7) operating a 10kV high-voltage pincerlike ammeter for an electrician, respectively pushing an instrument guide area into a drainage wire and a shunt wire, respectively withdrawing the instrument guide area from the drainage wire and the shunt wire after instrument data storage is finished, and checking instrument storage data;

8) after the stored data of the instrument is confirmed to be qualified, the auxiliary tool for drawing and shunting the fixture is removed; the electrician is operated to open the safety belt and return along the original path;

9) and withdrawing the insulating ladder with the adjustable angle, pulling out the fixed ground drill rod, arranging the tool and finishing the installation.

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