CN107946997B - An operating method for replacing a middle-phase isolating switch with load by an insulating rod method - Google Patents

Abstract

The present invention relates to a kind of operational methods of insulating bar method on-load replacement disconnecting switch, are widely used in the work of overhead distribution ground potential method replacement disconnecting switch, belong to distribution line hotline maintenance site technology field.The following steps are included: lead masking hanging plate is hung on side phase conductor and insulator pin using insulating bar, complete the insulation masking of opposite side phase terminal, integrated mask is hung using insulating bar, completes the insulation masking of opposite side phase strain insulator, wire clamp and part conducting wire；Switch two sides lead is isolated in disconnection, at this time in isolate switch just in electroless state, the disconnecting switch that operating personnel more renews；Disconnecting switch two sides lead is accessed into main traverse line using insulating bar.This method is not necessarily to have a power failure in operation, and complete insulation is cooperated to cover safety device, insulate to electrical body, grounding body and covers and be isolated, and ensures that operating personnel and charging equipment keep enough safe distances, safety coefficient height.

Description

An operating method for replacing a middle-phase isolating switch with load by an insulating rod method

technical field

The invention relates to an operation method for replacing an isolating switch under load by an insulating rod method, which is widely used in the work of replacing the isolating switch by the ground potential method of an overhead distribution line, and belongs to the technical field of live maintenance on-site distribution lines.

Background technique

High-voltage isolating switches are widely used in 10KV distribution lines, mainly used for "isolating power supply, switching off operation, and connecting and cutting off small circuit currents", without arc extinguishing function. Only when there is no load current, the circuit can be divided or closed, and other equipment can only be used to disconnect the circuit before operation. Because of its wide application, the common faults in the operation of isolating switches are: 1. Overloaded, increased contact resistance causes overheating of the contact part; 2. Long-term operation of porcelain insulation damage and flashover discharge; 3. Refused to open and close; 4. Incorrect closing.

Replacing the isolating switch in a power outage will inevitably interrupt the power supply in a certain area, affect the normal production and life of a large number of users, and reduce the reliability of power supply, which is extremely unfavorable for improving quality service and user satisfaction.

At present, the work of replacing the isolating switch with load is mainly carried out by the intermediate potential operation method, that is, the operator wears an insulating helmet and a full set of insulating clothing, and operates the insulating bucket of the insulating arm truck to approach the working position for maintenance operations. The intermediate potential operation method has the following shortcomings: 1. It depends on the terrain conditions, the terrain is rugged, and the site is narrow and cannot meet the needs of vehicle parking; 2. The cost is high, and the cost of tripping the insulated bucket arm truck and personnel expenses are higher than that of the pole-mounting operation; 3. . Compared with the intermediate potential operation, the ground potential operation is mainly completed by the operating lever, which ensures the distance between the personnel and the charged body, and has a high safety factor.

At present, there is an urgent need for an operating method for replacing a middle-phase isolating switch with an insulating rod method under load that can solve the above-mentioned technical problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method for replacing the disconnecting switch with load that can be carried out at ground potential. The method does not require power outage during operation, and cooperates with a complete set of insulating shielding protection appliances to perform insulation shielding and isolation on the live body and the grounding body. The operator maintains a sufficient safety distance from the live equipment, the operation is simple and the safety factor is high.

An operating method for replacing a middle-phase isolating switch with load by an insulating rod method, which is special in that it includes the following steps:

1. Conduct electricity inspection on the lines and devices, and proceed to the next step after the electricity inspection is qualified;

2. Install the ground potential pulley on the cross arm;

3. Install the pole shield to insulate and shield the pole;

4. Install isolating switch insulation baffles on both sides of the phase, respectively, to insulate and shield the isolating switches on both sides;

5. Use the insulating operating rod to hang the lead shielding hanging plate 22 on the side-phase wires and the insulator ball head to complete the insulation shielding of the opposite side-phase leads. Use the insulating operating rod to hang the integrated shielding cover to complete the opposite side-phase tensile insulator. , insulation shielding of wire clips and some conductors (use four sets of shielding tools to effectively shield the live equipment on both sides of the cross arm on both sides);

6. Strip the insulation layer of the wire at 15-20cm outside the middle-phase wire clip on both sides (the length of the stripped insulation layer should meet the length requirements for installing the temporary drain wire and the live wire clip);

7. Use the insulating operating rod to install the temporary insulating drain wire simultaneously, and bypass the neutral-phase isolating switch;

8. Detect the current flow of the temporary insulation drain wire of the middle phase, and after confirming that the shunt is good, open the isolation switch of the middle phase;

9. Disconnect the leads on both sides of the mid-phase isolating switch. At this time, the mid-phase isolating switch is in a no-power state, and the operator replaces the new isolating switch;

10. After the new isolating switch is installed and the pull and closing tests are passed, use the insulating operating rod to connect the leads on both sides of the isolating switch to the main lead;

11. Close the middle-phase isolating switch, and after checking that the conduction of the mid-phase isolating switch is good, use the insulating operating rod to remove the temporary insulating drain wire of the middle-phase synchronously;

12. Use the insulating operating lever to remove the integrated shielding cover and the lead shielding hanging plate 22 on both sides respectively in the reverse order of installation, and remove the insulating baffle of the isolating switch, the shielding cover of the pole, and the ground potential pulley. The operation is over.

As a preferred technical solution of the present invention, the lead shielding hanging plate 22 is in a concave shape, and the two ends of the top of the lead shielding hanging plate 22 are respectively installed with hooks I23 hooked to the insulator bowl head and connected to the wire. The hook body II 24 to be hooked up, a connector 26 is installed on the lead shielding hanging plate 22, the connector 26 is installed at the upper position of the lead shielding hanging plate 22 and is located at the middle position in the length direction of the lead shielding hanging plate 22, and the lead shielding hanging plate is A handle slot 30 is opened above the 22, and the handle slot 30 is located just above the connector 26;

As a preferred technical solution of the present invention, a connector I36 is installed on the outer wall of the integrated shielding cover, and the integrated shielding cover includes an insulator cover 31 covering the outside of the insulator and a wire cover 32 covering the outside of the wire. Both the insulator cover (31) and the wire cover (32) are provided with an opening at the bottom, and the two are connected to each other. One side of the insulator cover 31 is provided with a slot I33 that is clamped with the insulator bowl head. The side is provided with a slot II 34 for passing through the wire and being clamped with the wire. The cross section of the insulator cover 31 is n-shaped, the cross section of the wire cover 32 is convex, and the height of the insulator cover 31 is higher than the wire cover 32. Height, the width of the insulator cover 31 matches the width of the cover bottom of the wire cover 32, the card slot I33 and the card slot II34 are vertical strips, the top of the card slot I33 is designed as an arc, the bottom is designed as a figure of eight, and the card slot II34 The top of the cable is designed as a zigzag shape, the bottom is designed as a zigzag shape, and a handle 35 is installed on the top of the wire cover 32;

As a preferred technical solution of the present invention, the connecting head 26 and the connecting head I36 are both T-shaped, including a horizontal mounting piece 27, and a fixing piece 28 perpendicular to the horizontal mounting piece 27 is installed on the horizontal mounting piece 27. The bottom of the fixing piece 28 A plug connector 29 is installed, a piercing nail 25 is installed in the diameter direction of the fixing member 28, and both ends of the piercing nail 25 are located outside the fixing member 28;

As a preferred technical solution of the present invention, the insulating operating rod includes a metal head 4 that is inserted into the connecting head 26 or the connecting head I36, the metal head 4 is installed on the end of the insulating transmission rod 6, and the outside of the metal head 4 is An intermediate ring 3 for fixing the connecting head 26 or the connecting head I36 is sleeved. The outer part of the intermediate ring 3 is sleeved with a locking ring 1 that can be lifted and lowered. The outer tube I12, the outer tube II13, the end of the outer tube II13 is fixed with the end of the insulating transmission rod 6;

As a preferred technical solution of the present invention, the metal head 4 includes a plug end 4-1 that is plugged with the plug connector 29 and an installation end 4-2 installed on the insulating transmission rod 6. The plug end 4- 1 It is an integral structure with the installation end 4-2, and the outer diameter of the plug end 4-1 is larger than the outer diameter of the installation end 4-2, so that a card table I14 is formed at the connection between the two;

As a preferred technical solution of the present invention, the intermediate ring 3 includes an end head 15, an intermediate sleeve 16, and a fixed pipe 17 sleeved on the outside of the metal head 4, and the end head 15, the intermediate sleeve 16, and the fixed pipe 17 are End-to-end integrated structure, and the outer diameter and inner diameter of the three are successively decreased to form a clamping table II 18 at the connection between the end 15 and the outer wall of the intermediate sleeve 16, and at the connection between the intermediate sleeve 16 and the inner wall of the fixed tube 17. Forming the card table III19, the card table III19 is connected with the card table I14;

As a preferred technical solution of the present invention, the fixing tube 17 is provided with a piercing hole I5, the outer tube I12 is provided with a piercing hole II10 which is used in conjunction with the piercing hole I5, and the end of the outer tube II13 is provided with a piercing hole I5. Nail hole III21, the end of the insulating transmission rod 6 is provided with a nail penetration hole IV8 which is used in conjunction with the nail penetration hole III21;

As a preferred technical solution of the present invention, the end of the end 15 close to the power tool is provided with two hollow card slots 20. The two hollow card slots 20 are symmetrical with the central axis of the end The slot 20 includes a vertical hollow slot 20-1 extending from the end of the end head 15 close to the power tool to the middle position of the end head 15, a horizontal hollow slot 20-2 communicating with the vertical hollow slot 21, and a horizontal hollow slot 20-2. The end is provided with an upwardly extending arc-shaped hollow slot 20-3;

As a preferred technical solution of the present invention, the intersection of the vertical hollow slot 20-1 and the horizontal hollow slot 20-2 is designed in a slope shape;

As a preferred technical solution of the present invention, the locking ring 1 includes a spring 9 partially arranged in the locking ring 1 and a bottom ring 2 abutting against the tail of the spring 9. The inner wall of the locking ring 1 is provided with an annular clamp Stage IV11, the annular clamping stage IV11 is connected with the clamping stage II18. The inner diameter of the annular clamping stage IV11 is smaller than the outer diameter of the clamping stage II18. , one side of the bottom ring 2 abuts on the outer tube I12.

The insulation rod method of the present invention is used to replace the middle-phase isolating switch under load. The improvement of the common intermediate potential operation lies in the change of the operation mode and the application of hard insulation shielding tools. Compared with the intermediate potential operation method, the insulation rod In the method, the main insulation is changed from the insulation arm of the insulated bucket truck to the insulation operating rod, and the main insulation between phases is still an air gap. During the operation of the insulating rod method, the key lies in the order of insulation and shielding and the hooking and removal of the drain wire. With the special operating rod, the all-round shielding of the live body and the grounding body that may be touched can be easily and quickly achieved. The insulating rod method of the invention has less restrictions on the operating environment, and the operating tools are easy to carry and transport. Compared with the intermediate potential operation of the insulating bucket truck, the method has strong site applicability, low investment cost, and low personnel costs. The advantages of easy training and high safety factor help to expand the scope of live work, improve the reliability of the power grid, and ensure the normal use of electricity by users, which has great social benefits.

Description of drawings

Figure 1: Schematic diagram of the structure of the lead shielding hanging plate;

Figure 2: Schematic diagram of the structure of the insulating operating rod;

Figure 3: Schematic diagram of the installation sequence of the metal head, middle ring, locking ring, spring and bottom ring on the insulating transmission rod;

Figure 4: Schematic diagram of the structure of the intermediate ring;

Figure 5: Schematic diagram of the structure of the metal head;

Fig. 6: A-direction structural diagram of Fig. 4;

Figure 7: Schematic diagram of the structure of the locking ring;

Fig. 8: A-A sectional structure schematic diagram of Fig. 7;

Figure 9: Schematic diagram of the matching structure of the locking ring, the spring and the bottom ring;

Figure 10: Schematic diagram of the installation structure of the lead shielding hanging plate;

Figure 11: Schematic diagram of the structure of the integrated shield;

Fig. 12: A-A sectional structure schematic diagram of Fig. 11;

Fig. 13: B-B sectional structure schematic diagram of Fig. 11;

Figure 14: Left side view of Figure 11;

Figure 15: Right side view of Figure 11;

Figure 16: Schematic diagram of the installation structure of the shield.

In the figure: 1. Locking ring; 2. Bottom ring; 3. Intermediate ring; 4. Metal head; 5. Nail hole I; 6. Insulation transmission rod; 7. Insulation connecting ring; 8. Nail hole IV; 9. Cartridge III; 10. Nail hole II; 11. Cartridge IV; 12. Outer tube I; 13. Outer tube II; 14. Cartridge I; 15. End; 16. Intermediate casing; 17. Fixed tube; 18, card table II; 19, card table III; 20, hollow card slot; 20-1, vertical hollow slot; 20-2, horizontal hollow slot; 20-3, arc hollow slot; 21, piercing nail Hole III; 22, lead wire shielding hanging plate; 23, hook body I; 24, hook body II; 25, piercing nails; 26, connecting head; Handle slot; 31, insulator cover; 32, wire cover; 33, card slot I; 34, card slot II; 35, handle; 36, connector I.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

The working method of the insulating rod method under load replacement of the phase isolating switch in this embodiment, with reference to Figures 1-16, the tools used in the working method of the insulating rod method under load replacing the phase isolating switch in this embodiment mainly include the following components :

Locking ring 1, bottom ring 2, middle ring 3, metal head 4, nail hole Ⅰ5, insulating transmission rod 6, insulating connecting ring 7, nail hole Ⅳ8, clamping table Ⅲ9, nail hole Ⅱ10, clamping table Ⅳ11, Outer tube I12, outer tube II13, card table I14, end head 15, intermediate sleeve 16, fixed tube 17, card table II18, card table III19, hollow card slot 20, vertical hollow slot 20-1, horizontal hollow slot 20- 2. Arc-shaped hollow slot 20-3, nail hole III 21, lead shielding hanging plate 22, hook body I23, hook body II 24, nail penetration 25, connector 26, horizontal mounting piece 27, fixing piece 28, plug connector 29, Handle slot 30, insulator cover 31, wire cover 32, card slot I33, card slot II34, handle 35, connector I36.

The operating method for replacing the middle-phase isolating switch under load by the insulating rod method of the present embodiment includes the following steps:

1) Work preparation: on-site survey, layout of the work site, implementation of the work permit system, holding on-site station shift meetings, testing of insulating tools, tensile insulators, and preparations before climbing;

2) The operator on the pole climbs the pole to the working position, conducts electricity inspection on the line and device, and proceeds to the next step after the electricity inspection is qualified;

3) Worker A on the pole installs the ground potential pulley on the cross arm using an insulating operating rod;

4) Operators A and B on the poles should install pole shields to insulate and shield the poles;

5) Workers A and B on the pole cooperate to install two isolation switch insulation partitions to insulate and shield the phase isolation switches on both sides;

6) The operator on the pole uses an insulating operating rod to hang the lead shielding hanging plate on the side-phase wire and the insulator ball to complete the insulation shielding of the opposite side-phase lead; use the insulating operating rod to hang the integrated shielding cover to complete the opposite-phase phase resistance Insulation shielding of insulators, wire clips and part of the wires; (use four sets of shielding tools to effectively shield the live equipment on both sides of the cross arm)

7) Workers A and B on the pole cooperate with each other to strip the insulation layer of the wire at 15cm outside the middle-phase wire clip on both sides (the length of the stripped insulation layer should meet the length requirements for the installation of the temporary drain wire and the live wire clip);

8) Two workers, A and B, use the multi-functional insulating operating rod to install the temporary insulating drain wire simultaneously, and bypass the middle-phase isolating switch;

9) The operator checks the flow of the middle-phase temporary insulation drainage line, and after confirming that the shunt is good, open the middle-phase isolation switch;

10) The operator cuts off the leads on both sides of the middle-phase isolation switch by using the special-shaped insulating disconnector, and the middle-phase isolation switch is in a no-power state at this time, and the operator replaces the new isolation switch;

11) After the installation of the new isolating switch is completed and the pull and closing tests are passed, the operator on the pole will use the multi-functional insulating operating rod to connect the leads on both sides of the isolating switch to the main lead.

12) The operator closes the middle-phase isolation switch, and after checking that the flow of the middle-phase isolation switch is good, the operator on the pole uses the multi-functional insulating operating rod to simultaneously remove the middle-phase temporary insulation drain wire at a suitable position.

13) The operator on the pole uses the multi-functional insulating operating rod to remove the integrated shielding cover and the lead shielding hanging plate on both sides respectively in the reverse order of installation, and remove the insulating partition of the isolating switch, the shielding cover of the pole, and the pulley. Leave the work area and the work is over.

14) After the work is finished, organize the tools and equipment and clean up the site, hold a closing union, and go through the work termination procedures.

Connection relationship: the height of the lead shielding hanging plate 22 in this embodiment is 1.2 meters, the width is 0.9 meters, and the thickness is 4 mm. The connected hook body I23, the hook body II24 connected with the wire, the lead wire shielding hanging plate 22 is provided with a connecting head 26, the connecting head 26 is connected with a detachable insulating operating rod, and the insulating operating rod includes a plug connector 29. The metal head 4 is connected, the metal head 4 is installed on the end of the insulating transmission rod 6, the outer part of the metal plug 4 is sleeved with an intermediate ring 3 for fixing the power tool, and the outer part of the intermediate ring 3 is sleeved with a lifting lock Ring 1, along the outer length direction of the insulating transmission rod 6, is sleeved with an outer tube I12 and an outer tube II13 that are screwed together, and the end of the outer tube II13 is fixed with the end of the insulating transmission rod 6;

The integrated shielding cover of this embodiment includes an insulator cover 31 covering the outside of the insulator and a wire cover 32 covering the outside of the wire. One side of the insulator cover 31 is provided with a slot I33 that is clamped with the insulator bowl head, one side of the wire cover 32 is provided with a slot II34 for passing through the wire and being clamped with the wire, and the insulator cover 31 A connector I36 is installed on the outer wall of the intersection with the wire cover 32. The connector I36 is connected with a detachable insulating operating rod. The insulating operating rod includes a metal head 4 that is inserted into the connector 26. At the end of the rod 6, an intermediate ring 3 for fixing the power tool is sleeved on the outside of the metal head 4, and a lifting locking ring 1 is sleeved on the outside of the intermediate ring 3. Along the outer length of the insulating transmission rod 6 The outer tube I12 and the outer tube II13 are screwed together, and the end of the outer tube II13 is fixed with the end of the insulating transmission rod 6;

In this embodiment, the lead shielding hanging plate 22 is in a concave shape. The top two ends of the lead shielding hanging plate 22 are respectively installed with hooks I 23 and II 24 , and the connector 26 is installed on the upper position of the lead shielding hanging plate 22 . At the middle of the length direction of the lead shielding hanging plate 22, a handle groove 30 is opened above the lead shielding hanging plate 22, and the handle groove 30 is located directly above the connecting head 26. The connecting head 26 is T-shaped, including being fixed on the lead shield The horizontal mounting piece 27 on the hanging plate 22, the horizontal mounting piece 27 is mounted with a fixing piece 28 perpendicular to it, the bottom of the fixing piece 28 is fitted with a plug connector 29, and the diameter direction of the fixing piece 28 is provided with a piercing nail 25, Both ends of the nail 25 are located outside the fixing member 28;

The cross section of the insulator cover 31 in this embodiment is n-type, the cross section of the wire cover 32 is convex, the height of the insulator cover 31 is higher than the height of the wire cover 32 , the width of the insulator cover 31 is the same as the bottom of the wire cover 32 The width of the card slot I33 and the card slot II34 are vertical strips. The top of the card slot I33 is designed as an arc and the bottom is designed as a figure-eight shape. A handle 35 is installed on the top of the wire cover 32;

The metal head 4 in this embodiment includes a plug end 4-1 that is plugged with the plug connector 29 and a mounting end 4-2 installed on the insulating transmission rod 6. The plug end 4-1 and the mounting end 4-2 are One-piece structure, the outer diameter of the plug-in end 4-1 is larger than the outer diameter of the installation end 4-2, so that a card table I14 is formed at the connection between the two;

The intermediate ring 3 in this embodiment includes an end head 15 , an intermediate sleeve 16 , and a fixed pipe 17 sleeved on the outside of the metal head 4 . The outer and inner diameters of the three are successively decreased so that a clamping table II18 is formed at the connection between the end head 15 and the outer wall of the intermediate sleeve 16, and a clamping table III19 is formed at the connection between the intermediate sleeve 16 and the inner wall of the fixed pipe 17, and the clamping table III19 It is clamped with the clamping table I14, the fixing tube 17 is provided with a nail-piercing hole I5, the outer tube I12 is provided with a nail-piercing hole II10 which is used in conjunction with the nail-piercing hole I5, and the end of the outer tube II13 is provided with a nail-piercing hole III21. The end of the insulating transmission rod 6 is provided with a piercing hole IV8 which is used in conjunction with the piercing hole Ⅲ21;

In the present embodiment, the end of the end head 15 close to the power tool is provided with two hollow card slots 20 . One end of the power tool extends to the vertical hollow slot 20-1 at the middle position of the end head 15, and the horizontal hollow slot 20-2 communicated with the vertical hollow slot 21. The end of the horizontal hollow slot 20-2 is provided with an upwardly extending arc shape hollow slot 20-3; the intersection of the vertical hollow slot 20-1 and the horizontal hollow slot 20-2 is designed as a slope;

The locking ring 1 of this embodiment includes a spring 9 partially arranged in the locking ring 1 and a bottom ring 2 abutting against the tail of the spring 9. An annular clamping table IV11 is provided on the inner wall of the locking ring 1. The annular clamping table IV11 and the The clamping table II18 is connected to each other. The inner diameter of the annular clamping table IV11 is smaller than the outer diameter of the clamping table II18. The top of one end of the spring 9 abuts on the annular clamping table IV11, and the other end abuts on the bottom ring 2. One side of the bottom ring 2 Abut on the outer tube I12.

The working principle of the lead shielding hanging plate 22 and the integrated shielding cover: In this embodiment, an insulating operating rod is used to hang the lead shielding hanging plate 22 on the wire, the hook body I23 is hung on the bowl head of the insulator, and the hook body II24 is hung on the wire , and then rotate the operating lever in the opposite direction to unlock the connector 26 and remove the operating lever to complete the installation of the lead shielding hanging plate. When hanging, pay attention to place the tensile insulator string at the notch of the lead shielding hanging plate 22. This embodiment adopts The insulating operating rod hangs the shielding cover on the wire, the insulator cover 31 of the shielding cover is placed on the outside of the insulator, the wire cover 32 is placed on the outside of the wire, and the two ends of the shielding cover are respectively hung on the bowl head of the insulator and the wire. After completion, rotate the operating lever in the opposite direction to unlock the connector 26 and remove the operating lever to complete the installation of the shield. The specific process is as follows:

In this embodiment, the metal head 4 is located in the intermediate ring 3, the clamping table I14 of the metal head 4 is clamped on the clamping table III19 in the intermediate ring 3, the intermediate ring 3 is partially located in the locking ring 1, and the clamping table outside the intermediate ring 3 The stage II18 is clamped on the clamping stage IV11 inside the locking ring 1, and part of the hollow slot 20 on the middle ring 3 is blocked by the locking ring 1. When in use, the electrician on the pole mounts the pole to an appropriate position to communicate with the surrounding electrified body. Keep a safe distance of more than 0.4m, the ground electrician uploads the insulating operating rod and the lead shielding hanging plate 22 to the electrician on the pole through the rope, and the electrician on the pole inserts the metal head 4 with the plug connector 29, and then presses down the locking ring 1 , so that the hollow slot 20 is completely exposed, so that the piercing nail 25 is inserted into the vertical hollow slot 20-1, and then the middle ring 3 is rotated to move the piercing nail 25 into the horizontal hollow slot 20-2, and then move to the arc hollow slot 20-2. In 20-3, at this time, the locking ring 1 is reset under the action of the spring 9, and the top of the locking ring 1 tightly clamps the piercing nails 25 in the arc-shaped hollow groove 20-3, thereby connecting one end of the insulating operating rod. It is fixed with the lead shielding hanging plate 22 as a whole. At this time, the staff lifts the lead shielding hanging plate 22 through the insulating operating rod, the hook body I23 is hung on the bowl head of the insulator, and the hook body II24 is hung on the wire, and the hanging is completed. Then, rotate the outer tube II 13 in the opposite direction, unlock the connector 26 and remove the insulating operating rod, and complete the installation of the lead shielding hanging plate. The same is true for hanging the shielding cover. The staff lifts the shielding cover through the insulating operating rod. One side of the card slot I33 is hung on the insulator bowl head, and the other side of the card slot II34 is hung on the wire. After the hanging is completed, rotate the outer tube II13 in the opposite direction to unlock the connector 26 and remove the insulating lever to complete the shield. The installation is very convenient, the work efficiency is high, the effect is good, and the safety factor is high.

The insulating rod method of the invention has less restrictions on the operating environment, and the operating tools are easy to carry and transport. Compared with the intermediate potential operation of the insulating bucket truck, the method has strong site applicability, low investment cost, and low personnel costs. The advantages of easy training and high safety factor help to expand the scope of live work, improve the reliability of the power grid, and ensure the normal use of electricity by users, which has great social benefits.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (9)

1. an operation method of a middle-phase isolating switch in an insulating rod method with a load replacement, characterized in that it comprises the following steps: 1), conduct electricity inspection on the lines and devices, and proceed to the next step after the electricity inspection is qualified; 2), install the ground potential pulley on the cross arm; 3), install the pole shield to insulate and shield the pole; 4) Install isolating switch insulation baffles on both sides of the phase respectively, and insulate and shield the isolating switches on both sides; 5) Use the insulating operating rod to hang the lead shielding hanging plate (22) on the side-phase wires and the insulator ball to complete the insulation shielding of the opposite side-phase leads. Use the insulating operating rod to hang the integrated shielding cover to complete the opposite-phase phase Insulation shielding of tensile insulators, clips and some conductors; 6), strip off the wire insulation layer 15-20cm outside the middle-phase wire clip on both sides; 7) Use the insulating operating rod to install the temporary insulating drain wire simultaneously, and bypass the middle-phase isolating switch; 8) Detect the flow of the middle-phase temporary insulation drain line, and after confirming that the shunt is good, open the middle-phase isolation switch; 9) Disconnect the leads on both sides of the mid-phase isolating switch. At this time, the mid-phase isolating switch is in a no-power state, and the operator replaces the new isolating switch; 10) After the new isolating switch is installed and the pull and closing tests are qualified, use the insulating operating rod to connect the leads on both sides of the isolating switch to the main lead; 11) Close the middle-phase isolating switch, and after checking that the current is in good condition of the mid-phase isolating switch, use the insulating operating rod to remove the temporary insulating drain wire of the middle-phase synchronously; 12) Use the insulating operating lever to remove the integrated shielding cover and the lead shielding hanging plate (22) on both sides respectively in the reverse order of installation, and remove the isolation switch insulation partition, the pole shielding cover, and the ground potential pulley. the end of the job; A connector I (36) is installed on the outer wall of the integrated shielding cover, and the integrated shielding cover includes an insulator cover (31) covering the outside of the insulator and a wire cover (32) covering the outside of the wire, and the insulator cover ( 31) and the wire cover (32) are provided with an opening at the bottom and the two are connected to each other. One side of the insulator cover (31) is provided with a slot I (33) that is clamped to the insulator bowl head. The wire cover (31) One side of 32) is provided with a slot II (34) for passing through the wire and being clamped with the wire, the cross section of the insulator cover (31) is n-shaped, and the cross section of the wire cover (32) is convex. The height of the insulator cover (31) is higher than the height of the wire cover (32), the width of the insulator cover (31) matches the width of the bottom of the wire cover (32), the slot I (33) and the slot II (34) They are all vertical strips. The top of the card slot I (33) is designed in an arc shape and the bottom is designed in a figure-eight shape. A carrying handle (35) is installed on the top of the . 2. An operation method for replacing a middle-phase isolating switch under load by an insulating rod method according to claim 1, characterized in that the lead shielding hanging plate (22) is in a concave shape, and the top two of the lead shielding hanging plate (22) are in the shape of a concave. A hook body I (23) hooked to the insulator bowl head and a hook body II (24) hooked to the wire are respectively installed at the end positions, and a connector (26) is installed on the lead shield hanging plate (22), The connecting head (26) is installed at the upper position of the lead shielding hanging plate (22) and is located at the middle position in the length direction of the lead shielding hanging plate (22), and a handle groove (30) is opened above the lead shielding hanging plate (22), The handle slot (30) is located just above the connector (26). 3. An operation method for replacing a middle-phase isolating switch with an insulating rod method under load according to claim 2, characterized in that the connecting head (26) or the connecting head I (36) is T-shaped, including horizontal mounting parts (27), a fixing member (28) perpendicular to it is installed on the horizontal installation member (27), a plug connector (29) is installed at the bottom of the fixing member (28), and a piercing connector (29) is installed on the diameter direction of the fixing member (28). The two ends of the nail (25) are located outside the fixing member (28). 4. An operation method for replacing a middle-phase isolating switch with load by an insulating rod method according to claim 3, characterized in that the insulating operating rod comprises a connecting head (26) or a connecting head I (36) that is inserted into Metal head (4), the metal head (4) is installed on the end of the insulating transmission rod (6), and the outer sleeve of the metal head (4) is provided with a middle for fixing the connecting head (26) or the connecting head I (36). Ring (3), the outer sleeve of the middle ring (3) is provided with a locking ring (1) that can be lifted and lowered, and an outer tube I (12) that is screwed together along the outer length direction of the insulating transmission rod (6) is sleeved , Outer tube II (13), the end of the outer tube II (13) is fixed with the end of the insulating transmission rod (6). 5. An operation method for replacing a middle-phase isolating switch with an insulating rod method under load according to claim 4, characterized in that the metal head (4) comprises a plug end (4) that is plugged into the plug connector (29). -1) and the mounting end (4-2) installed on the insulating transmission rod (6). The outer diameter is larger than the outer diameter of the installation end (4-2) so as to form a clamping table I (14) at the connection between the two. 6. An operation method for replacing a middle-phase isolating switch with an insulating rod method under load according to claim 4, characterized in that the intermediate ring (3) comprises a terminal (15) sleeved on the outside of the metal head (4). , the middle sleeve (16), the fixed pipe (17), the end head (15), the middle sleeve (16), and the fixed pipe (17) are an integral structure connected end to end, and the outer diameter and inner diameter of the three are in order Decrease so as to form a clamping table II (18) at the connection between the end head (15) and the outer wall of the intermediate sleeve (16), and form a clamping table III (19) at the connection between the intermediate sleeve (16) and the inner wall of the fixed pipe (17) ), the card table III (19) is connected with the card table I (14). 7. An operation method for replacing a middle-phase isolating switch with an insulating rod method under load according to claim 6, characterized in that the fixing pipe (17) is provided with a piercing hole I (5), and the outer pipe I (12) ) is provided with a nail-through hole II (10) used in conjunction with the nail-through hole I (5), the end of the outer tube II (13) is provided with a nail-through hole III (21), and the end of the insulating transmission rod (6) is provided with a nail-through hole III (21). There is a piercing hole IV (8) used in conjunction with the piercing hole Ⅲ (21). 8. An operation method for replacing a middle-phase isolating switch with an insulating rod method under load according to claim 6, characterized in that two hollow slots (20) are formed at one end of the end head (15) close to the power tool, The two hollow card slots (20) are symmetrical with the central axis of the end head (15) as the axis center, and the hollow card grooves (20) include extending from the end of the end head (15) close to the power tool to the middle of the end head (15). The vertical hollow slot (20-1) at the position, the horizontal hollow slot (20-2) communicated with the vertical hollow slot (21), the end of the horizontal hollow slot (20-2) is provided with an upwardly extending arc hollow slot (20-3), the intersection of the vertical hollow slot (20-1) and the horizontal hollow slot (20-2) is designed as a slope. 9. The method for replacing a middle-phase isolating switch with an insulating rod method according to claim 6, characterized in that the locking ring (1) comprises a spring (9) partially arranged in the locking ring (1). ) and the bottom ring (2) at the end of the spring (9), the inner wall of the locking ring (1) is provided with an annular clamping table IV (11), and the annular clamping table IV (11) is in phase with the clamping table II (18). Snap connection, the inner diameter of the annular clamping table IV (11) is smaller than the outer diameter of the clamping table II (18), the top of one end of the spring (9) abuts on the annular clamping table IV (11), and the other end abuts on the bottom ring (2). ), one side of the bottom ring (2) abuts on the outer tube I (12).