CN102623927B - Charged for replacement 220kV circuit multiloop double bundle conductor insulator tool and method - Google Patents

Abstract

The invention provides a tool for live replacement of 220kV line multi-circuit double-split conductor insulators, which includes a cross arm clamp, a connecting plate clamp, a clamp hook, two screw rod assemblies and two insulating pull plates; one end of the cross arm clamp and the cross arm Fixed connection, the other end is connected through the screw assembly, the insulating pull plate and the connecting plate card; the screw assembly includes the screw and the handle, the screw is installed on the cross-arm card, the handle is located at the upper end of the screw, and the lower end of the screw is connected to the Insulated pull-plate connection; there is a groove for embedding the connecting plate on the connecting plate card, one end of the connecting plate card is connected with an insulating pulling plate, and the other end of the connecting plate card is connected with another insulating pulling plate through a clamp hook. The invention also provides a ground potential working method for live replacement of an insulator by using the tool provided by the invention. Using the tool provided by the invention, combined with the method provided by the invention, can smoothly replace the insulators of the middle and upper phase double-split wires of the 220kV line multi-circuit tower, the method is simple, the operation is easy, and the operator can work safely.

Description

Tools and methods for live replacement of 220kV line multi-circuit double-split conductor insulators

technical field

The invention relates to the field of live replacement of insulators, in particular to a tool and method for live replacement of multi-circuit double-split wire insulators of 220kV lines.

Background technique

The Zhuzhou transmission network currently has 136 110kV and above lines with a length of 1,792 kilometers, including 30 220kV lines with a length of 706 kilometers, and 20 multi-circuit 220kV lines with a total length of 467 kilometers on the same pole. Every year, due to lightning strikes, self-explosion, and detection, more than 30 insulators need to be replaced on the line, of which about 20 are replaced for live work. Live work can reduce power outage time, increase power supply, and improve grid reliability. However, since the ice disaster in 2008, more than 10 110kV-220kV transmission lines with a length of more than 400 kilometers have been newly built or rebuilt in Zhuzhou area, among which a large number of new reinforced towers and multi-circuit towers have been added. Requirements for carrying out live work.

For example, there are no suitable cross-arm fixtures for special tower types such as sliding door towers, wine glass reinforced iron towers, and reinforced cross-arm structures. At the same time, it is not convenient to carry out ground potential live work for double-split conductors. In particular, there are untargeted ground potential live working tools in the double-split conductor line with multiple common poles. The middle and upper phase insulators are the most difficult to replace because it is difficult for equipotential operators to enter the equipotential operation.

At present, the live work of replacing insulators on 110kV-220kV multi-circuit iron towers and double-split conductors is mainly carried out by means of equipotential work. The equipotential operation method has high work intensity, many personnel, and complicated procedures, and the electric field radiation and operation safety risks suffered by the equipotential operators are very high. Moreover, for the double-circuit common-rod line, the distance between the conductors is small, the live equipment is densely distributed, and the safety distance and working gap are too small to facilitate equipotential work. In addition, during the live replacement operation of the double-split wire insulator, the connecting plate cannot be fixed because it is out of control after it is separated from the insulator.

Therefore, the research and development of new operation methods and tools for live replacement of multi-circuit iron tower insulators is of great significance for overcoming difficult projects of live work, promoting the development of live work, and maintaining the safe and stable operation of the power grid.

Contents of the invention

The invention solves the technical problems in the prior art of live replacement of double-split wire insulators of multi-circuit poles and towers, lack of targeted live working tools, unfixable connection plates, high working intensity, complicated procedures, and high safety risks for operators.

The invention provides a tool for live replacement of 220kV line multi-circuit double-split wire insulators, which includes a cross arm clip, a connecting board clip, a clip hook, two screw rod assemblies and two insulating pull plates;

One end of the cross-arm card is used for fixed connection with the cross-arm of the pole tower, and the other end is connected with the connecting board card through the screw assembly, the insulating pull plate;

The screw assembly includes a screw and a handle; the screw is passed through the cross arm card, the handle is located at the upper end of the screw, and the lower end of the screw is connected with the insulating pull plate;

The connecting plate is provided with a groove for embedding the side connecting plate of the wire, one end of the connecting plate is connected with an insulating pull plate, and the other end of the connecting plate is connected with another insulating pull plate through a clamp hook.

The present invention also provides a method for live replacement of 220kV line multi-circuit double-split wire insulators using the tool provided by the present invention, comprising the following steps:

A. Boarding pole: The ground potential operator carries the sling to the pole tower to the side of the cross arm, and registers the sling; the ground potential operator climbs the pole tower to the wire side;

B. Installation tools: The ground coordination personnel will lift the cross-arm card to the side of the cross-arm, and the ground potential operator will fix the cross-arm card on the cross-arm of the tower; the ground coordination personnel will assemble the assembled screw rod assembly, insulating pull plate, The connecting board and fixture hook are hoisted to the side of the cross arm as a whole, and the ground potential operator fixes the whole and the cross arm, so that the connecting board on the wire side is clamped tightly in the groove of the connecting board;

C. Tighten the screw: the ground potential operator shakes the handle to tighten the screw, and lifts the wire through the connecting board, so that the insulator to be replaced does not bear the gravity of the wire;

D. Replace the insulator: The ground potential operator pulls out the spring pin at the wire end, the ground potential operator uses a sling to tie the insulator to be replaced, then pulls out the spring pin on the side of the cross arm, and puts the insulator to be replaced to the bottom with a sling; Cooperate with the personnel to lift the new insulator to the side of the cross arm, the ground potential operator installs the spring pin on the side of the cross arm to fix the new insulator and the cross arm, and the ground potential operator installs the spring pin on the wire side to fix the new insulator and the wire;

E. Removal tools: ground potential operators remove all tools in turn, put them on the ground with a sling, and then carry the sling down the pole, and the work is completed.

The tool provided by the present invention, combined with the ground potential operation method provided by the present invention, can fix the connecting plate and the insulator through the connecting plate after it is separated, and can smoothly replace the double-split wire insulators of the middle and upper phases of the 220kV line multi-circuit, and is suitable for Various complex and special tower-shaped cross arms, such as concrete pole cross arms, lamen tower cross arms, and reinforced iron tower cross arms. In addition, the method is simple and easy to operate through the ground potential live work, and it can also avoid the risk of equipotential work and ensure the safe operation of the operators.

Description of drawings

Fig. 1 is a schematic structural diagram of a tool for live replacement of insulators for multi-circuit double-split conductors of a 220kV line provided by Embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of the cross-arm card in Fig. 1 .

FIG. 3 is a schematic structural diagram of the Zhonglian board in FIG. 1 .

Fig. 4 is a schematic structural diagram of the clamp hook and the insulating pull plate in Fig. 1 .

Fig. 5 is a schematic structural diagram of a tool for live replacement of insulators of multi-circuit double-split conductors of a 220kV line provided by Embodiment 2 of the present invention.

Fig. 6 is a schematic structural diagram of the cross-arm card in Fig. 5 .

In the figure, 1—screw assembly, 2—cross arm clamp, 3—insulation pull plate, 4—connecting board, 5—clamp hook; 11—screw rod, 12—handle; 21 ——crossarm fixing part, 22—screw fixing part, 23—main body, 24—pad, 220—depressed groove; 31—clip hole; 40—groove, 41—single card I, 42—single card II; 50—hook body, 51—wave ring assembly, 52—wave ring handle, 501—hook portion, 502—rod portion.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Embodiment one

As shown in Figure 1, this embodiment provides a tool for live replacement of 220kV line multi-circuit double-split conductor insulators, including cross-arm clamp 2, connecting board clamp 4, clamp hook 5, two screw rod assemblies 1 and two Insulation pull plate 3.

One end of the cross-arm card 2 is used for fixed connection with the cross-arm of the pole tower, and the other end is connected with the connecting board card 4 through the screw assembly 1 and the insulating pull plate 3 .

In this embodiment, the structure of the cross-arm card 2 is shown in FIG. 2 , which includes a cross-arm fixing part 21 and a threaded rod fixing part 22 in an integrated structure. As shown in FIG. 2 , the cross arm fixing portion 21 is an L-shaped bent structure for hanging on the cross arm. In the present invention, in the actual use process, after the cross-arm fixing part 21 is suspended on the cross-arm, it is necessary to further lock and fix it with bolts, so as to prevent the cross-arm card from reversing and falling off from the cross-arm after being stressed. As shown in FIG. 2 , the screw fixing part 22 is provided with a concave groove 220 . The bottom of the concave groove 220 is provided with a screw hole for passing the screw 11 . In this embodiment, the number of the cross-arm cards 2 is two. Therefore, two screw mandrels 11 can be passed through the screw mandrel holes provided on the two cross-arm cards 2 .

The structure of the screw assembly 1 is shown in FIG. 1 , including a screw 11 and a handle 12 . The threaded rod 11 is installed in the threaded hole of the cross-arm card 2 , and both ends of the threaded rod 11 extend to the outside of the cross-arm card 2 . Wherein, the handle 12 is located at the upper end of the screw rod 11 , that is, above the cross arm card 2 . The lower end of the screw rod 11 is connected with the insulating pull plate 3 . By rotating the handle 12, the screw rod 11 can be controlled to move up and down, so as to adjust the distance between the connecting board card 4 and the cross arm card 2, so as to realize lifting or lowering of the wire.

The structure of the connecting board 4 is shown in FIG. 3 , and the connecting board 4 is provided with a groove 40 for embedding the wire side connecting board. As shown in FIG. 1 , one end of the link card 4 is connected to an insulating pull plate 3 , and the other end of the link card 4 is connected to another insulating pull plate 3 through a clamp hook 5 . On the one hand, the connecting board 4 can be used to fix the side connecting plate of the wire through the groove 40, and on the other hand, it can also be used to lift the double-split wire, thereby lifting the wire so that the insulator no longer bears the gravity of the wire, so that the insulator can be disassembled and replace it.

As shown in Figure 3, the said joint board 4 is made up of two triangular single cards (ie single card I 41 and single card II 42). Specifically, the connecting board 4 is formed by fixedly connecting the bottom of the single card I 41 and the single card II 42, and at the same time, there is a gap between the tops of the single card I 41 and the single card II 42, that is, the groove 40 . The groove 40 is used to fix the connecting plate, so after the connecting plate is detached from the insulator, the connecting plate can be fixed through the gap on the connecting plate card 4 . As shown in Figure 3, the end of the single card I 41 away from the single card II 42 is provided with a through hole. As shown in Figure 1, the through hole on the single card 141 is used to pass through the bolt so as to be fixedly connected with an insulating pull plate 3. Single card II 42 is also provided with through hole on one end away from single card I 41. As shown in Figure 1, this through hole on the single card II 42 is used for threading the threading bolt to connect with the fixture hook 5.

As shown in FIG. 4 , the clip hook 5 includes a hook body 50 and a wave ring assembly 51 . The hook body 50 includes a hook portion 501 and a rod portion 502 . As shown in FIG. 1 , the hook portion 501 is used to connect with one end of the connecting card 4 . As shown in FIG. 1 , the rod portion 502 is movably connected to the insulating pull plate 3 through a wave ring assembly 51 .

The wave ring assembly 51 includes a built-in compression spring and a wave ring coupled with the compression spring. One end of the wave ring is provided with a wave ring handle 52 , and the other end is connected with the insulating pull plate 3 . Specifically, as shown in FIG. 4 , a plurality of clamping holes 31 are provided on the insulating pull plate 3 . The corrugated ring passes through the clamping hole 31 of the insulating pull plate 3 , so as to clamp and fix the insulating pull plate 3 and the clamp hook 5 . By tightening the wave ring handle 52, the compression spring shrinks, and the wave ring leaves the clamping hole 31 on the insulating plate 3. At this time, the clamp hook 5 can be moved up and down to a suitable position, and then the wave ring handle 52 is released, and the pressure spring Automatically reset, push the wave ring 51 into the engaging hole 31 at the corresponding position on the insulating pull plate 3, and then the insulating pull plate 3 and the fixture hook 5 can be snapped and fixed. In the present invention, the distance between the insulating pull plate 3 and the connecting plate 4 can be adjusted by pulling the wave ring handle 52 to clamp the wave rings in different engaging holes 31 on the insulating pull plate 3 .

As shown in FIG. 1 , in the present invention, the planes where the two insulating pull plates 4 are located are perpendicular to each other. Therefore, the directions of the through holes for passing the bolts on the connecting board 4 (single card I 41 and single card II 42) are also perpendicular to each other.

In the present invention, the tool further includes an insulating operating rod for pulling out the spring pin of the wire end.

The method for live replacement of 220kV line multi-circuit double-split wire insulators using the tool of this embodiment includes the following steps:

A. Boarding pole: The ground potential operator carries the sling to the pole tower to the side of the cross arm, and hangs the sling; the ground potential operator climbs the pole tower to the wire side;

B. Installation tools: The ground coordinators lift the two cross-arm cards 2 with the structure shown in Figure 2 to the cross-arm side, and the ground potential operators place the cross-arm fixing parts 21 of the two cross-arm cards 2 on the pole towers respectively. On the cross-arm angle steel, and tighten the bolts to make it fixedly connected with the cross-arm angle steel; ground coordinators connect the lower ends of the screw rods 11 of the two screw rod assemblies 1 with the upper ends of the two insulating pull plates 3 respectively on the ground , and then directly connect the lower end of one of the insulating pull plates 3 with one end of the connecting board card 4, and connect the other end of the connecting board card 4 with the hook portion 501 of the clamp hook 5, and then connect the rod portion 502 of the clamp hook 5 Through the connection between the wave ring assembly 51 and another insulating pull plate 3, by tightening the wave ring handle 52 and then moving the clamp hook 5 up and down to adjust the other insulating pull plate 3 to a suitable length, then loosen the wave ring handle 52 to place the clamp The hook 5 is clamped and fixed with another insulating pull plate 3 through the corrugated ring to form a U-shaped tool semi-finished body; Two cross-arm cards 2 are fixedly installed, specifically, the screw rods 11 of the two screw rod assemblies 1 are respectively passed through the screw holes at the bottom of the screw rod fixing parts 22 of the two cross-arm cards 2, and the handle 12 It is located at the upper end of the screw rod 11, that is, above the two cross-arm cards 2 respectively, and clamps the wire side connecting plate in the groove 40 of the connecting plate card 4;

C. Tighten the screw: the ground potential operator shakes the handles 12 of the two screw assemblies 1 at the same time, tightens the screw 11, and lifts the wire through the connecting board 4, so that the insulator to be replaced does not bear the gravity of the wire;

D. Replacement of insulators: The ground potential operator pulls out the spring pin at the end of the conductor using the insulation operating lever, and the ground potential operator uses a sling to fasten the insulator to be replaced, then pulls out the spring pin on the side of the cross arm, and puts the insulator to be replaced with a sling To the bottom surface; the ground coordination personnel lift the new insulator to the side of the cross arm, the ground potential operator installs the spring pin on the cross arm side to fix the new insulator and the cross arm, and the ground potential operator installs the wire side spring pin to fix the new insulator and the wire;

E. Removal tools: ground potential operators remove all tools in turn, put them on the ground with a sling, and then carry the sling down the pole, and the work is completed.

Embodiment two

The tool provided in this embodiment for live replacement of 220kV line multi-circuit double-split conductor insulators has the structure shown in FIG. 5 . In the tool provided in this embodiment, the structures of the connecting plate clamp 4 , the clamp hook 5 , the two screw rod assemblies 1 and the two insulating pull plates 3 are completely the same as those in the first embodiment, and will not be repeated here.

In this embodiment, the number of the cross-arm card 2 is one, and its structure is different from that of the cross-arm card in the first embodiment. Specifically, in this embodiment, as shown in FIG. 6 , the crosspiece card 2 includes a main body 23 and a spacer 24 fixedly coupled. As shown in FIG. 6 , two pads 24 are located below the main body 23 for supporting the main body 23 . The main body 23 and the spacer 24 are fixedly connected by bolts (not shown in the drawings). During the use of the crossarm card 2 in this embodiment, the spacer 24 of the crossarm card 2 is placed on the crossarm, that is, the main body 23 is kept above the crossarm.

As shown in FIG. 6 , both ends of the main body 23 are provided with screw fixing parts, and the screw fixing parts have the same structure as the screw fixing parts on the cross-arm card in the embodiment. Specifically, in this embodiment, a concave groove is provided on the fixing part of the screw rod, and a screw hole is provided at the bottom of the concave groove for passing the screw rod 11 . Since there are two screw fixing parts on the main body in this embodiment, the connection with the two screw assemblies 1 can be realized through a cross arm card 2, that is, the screw fixing parts at both ends of the main body 23 are respectively threaded Establish screw mandrel 11.

The method of using the tool of this embodiment to replace the multi-circuit double-split wire insulators of the 220kV line is roughly the same as that in Embodiment 1, specifically including:

A. Boarding pole: The ground potential operator carries the sling to the pole tower to the side of the cross arm, and hangs the sling; the ground potential operator climbs the pole tower to the wire side;

B. Installation tools: the ground coordination personnel lift a cross-arm card 2 with the structure shown in Figure 6 to the cross-arm side, and the ground potential operator places the pad 24 of the cross-arm card 2 on the cross-arm cladding board of the pole tower; The ground coordinators connect the lower ends of the screw rods 11 of the two screw rod assemblies 1 with the upper ends of the two insulating pull plates 3 respectively on the ground, and then directly connect the lower end of one of the insulating pull plates 3 to the connecting plate 4 The other end of the connecting plate card 4 is connected with the hook portion 501 of the clamp hook 5, and then the rod portion 502 of the clamp hook 5 is connected with another insulating pull plate 3 through the wave ring assembly 51, and the wave is tightened Ring handle 52 Then move the fixture hook 5 up and down to adjust the other insulating pull plate 3 to a suitable length, then loosen the corrugated ring handle 52 to clamp and fix the fixture hook 5 with the other insulating pull plate 3 through the corrugated ring to form a U shape The semi-finished tool; then lift the semi-finished U-shaped tool to the side of the cross arm, and the operator at the ground potential will fix the semi-finished U-shaped tool and the cross-arm card 2, and specifically install the screw rods 11 of the two screw rod assemblies 1 The screw fixing parts at the two ends of the main body 23 of the cross-arm card 2 respectively pass through the screw holes at the bottom of the recessed groove. The handle 12 is located at the upper end of the screw rod 11, that is, above the cross-arm card 2. Fastened in the groove 40 of the connecting board 4;

C. Tighten the screw: the ground potential operator shakes the handles 12 of the two screw assemblies 1 at the same time, tightens the screw 11, and lifts the wire through the connecting board 4, so that the insulator to be replaced does not bear the gravity of the wire;

D. Replacement of insulators: The ground potential operator pulls out the spring pin at the end of the conductor using the insulation operating lever, and the ground potential operator uses a sling to fasten the insulator to be replaced, then pulls out the spring pin on the side of the cross arm, and puts the insulator to be replaced with a sling To the bottom surface; the ground coordination personnel lift the new insulator to the side of the cross arm, the ground potential operator installs the spring pin on the cross arm side to fix the new insulator and the cross arm, and the ground potential operator installs the wire side spring pin to fix the new insulator and the wire;

E. Removal tools: ground potential operators remove all tools in turn, put them on the ground with a sling, and then carry the sling down the pole, and the work is completed.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (6)

1. A live replacement 220kV line multi-circuit double-split wire insulator tool is characterized in that the tool includes a crossarm clamp, a connecting board clamp, a clamp hook, two screw mandrel assemblies and two insulating pull plates; One end of the cross-arm card is used for fixed connection with the cross-arm of the pole tower, and the other end is connected with the connecting board card through the screw assembly, the insulating pull plate; The screw assembly includes a screw and a handle; the screw is passed through the cross arm card, the handle is located at the upper end of the screw, and the lower end of the screw is connected with the insulating pull plate; The connecting plate is provided with a groove for embedding the side connecting plate of the wire, one end of the connecting plate is connected with an insulating pull plate, and the other end of the connecting plate is connected with another insulating pull plate through a clamp hook; The clamp hook includes a hook body and a wave ring assembly; the hook body includes a hook portion and a rod portion; the hook portion is used to connect with one end of the connecting board card, and the rod portion and the insulating pull plate are movably connected through the wave ring assembly ; The planes where the two insulating pull plates are located are perpendicular to each other; The tool also includes an insulated operating lever for extracting the wire side spring pin. 2. The tool for live replacement of 220kV line multi-circuit double-split wire insulators according to claim 1, characterized in that, the number of the cross-arm cards is two, and each cross-arm card is respectively pierced with a screw rod; The cross-arm card includes a cross-arm fixing part and a screw fixing part of an integrated structure; the cross-arm fixing part is an L-shaped bending structure for hanging on the cross-arm; the screw fixing part is provided with a depression Groove, the bottom of the concave groove is provided with a screw hole. 3. The live replacement 220kV line multi-circuit double-split wire insulator tool according to claim 1, wherein the number of the cross-arm card is one; the cross-arm card includes a fixedly connected main body and two pads block; the two pads are located below the main body for carrying the main body; both ends of the main body are provided with a screw fixing part, the screw fixing part is provided with a concave groove, and the bottom of the concave groove is provided with a screw hole. 4. The tool for live replacement of 220kV line multi-circuit double-split conductor insulators according to claim 1, characterized in that, the connecting plate card is formed by two triangular single cards fixedly connected at the bottom, and the tops of the two triangular single cards There is a gap for embedding the side connecting plate of the wire; the ends of the two triangular single cards away from the gap are provided with through holes, one of which is fixedly connected with the insulating pull plate through the piercing bolt, and the other through hole is passed through the through hole. The bolt is connected with the clamp hook. 5. The tool for live replacement of 220kV line multi-circuit double-split conductor insulators according to claim 4, wherein the wave ring assembly includes a built-in compression spring and a wave ring connected with the compression spring, the other end of the wave ring is connected to the Insulation pull plate connection. 6. adopt the method for live replacement of 220kV line multi-circuit double-split conductor insulators with the live tool described in claim 1, comprise the following steps: A. Boarding pole: The ground potential operator carries the sling to the pole tower to the side of the cross arm, and hangs the sling; the ground potential operator climbs the pole tower to the wire side; B. Installation tools: The ground coordination personnel will lift the cross-arm card to the side of the cross-arm, and the ground potential operator will fix the cross-arm card on the cross-arm of the tower; the ground coordination personnel will assemble the assembled screw rod assembly, insulating pull plate, The connecting board and fixture hook are hoisted to the side of the cross arm as a whole, and the ground potential operator fixes the whole and the cross arm, so that the connecting board on the wire side is clamped tightly in the groove of the connecting board; C. Tighten the screw: the ground potential operator shakes the handle to tighten the screw, and lifts the wire through the connecting board, so that the insulator to be replaced does not bear the gravity of the wire; D. Replacement of insulators: The ground potential operator uses the insulation operating lever to pull out the spring pin on the wire side. The ground potential operator uses a sling to fasten the insulator to be replaced, then pulls out the spring pin on the side of the cross arm, and puts the insulator to be replaced with a sling. To the bottom surface; the ground coordination personnel lift the new insulator to the side of the cross arm, the ground potential operator installs the spring pin on the cross arm side to fix the new insulator and the cross arm, and the ground potential operator installs the wire side spring pin to fix the new insulator and the wire; E. Removal tools: ground potential operators remove all tools in turn, put them on the ground with a sling, and then carry the sling down the pole, and the work is completed.