CN108206482B - Live replacement operation method for LF type yoke plate insulator without operation hole - Google Patents

Abstract

The invention relates to a live replacement operation technology of an insulator string, in particular to a live replacement operation method of an LF-type yoke plate insulator without an operation hole, which provides a front clamping fixture with a special swinging head, a rear clamping fixture, an insulation pull rod and a wire tightening screw rod, wherein the assembly of a replacement operation tool is finished on the ground, a bolt is positioned in advance, and the replacement operation tool is transmitted to an electrician on a tower through an insulation transmission rope after the electrician on the tower reaches a designated working position; the electrician on the two towers cooperates with the operation to replace the working tool, the installation of the front clamp is finished firstly, the rear clamp is installed, and finally the insulator string is loosened through the wire tightening screw rod to replace. The invention has the advantages of simple structure and convenient operation, and effectively realizes the connection with the LF-type yoke plate without the operation hole, thereby further realizing the live replacement operation of the LF-type yoke plate insulator string without the operation hole, providing technical support for detecting and overhauling the insulator string, effectively reducing the power failure time of a line and improving the running reliability of a power grid.

Description

Method for live replacement of LF type joint plate insulator without operating holes

Technical field

The invention relates to a technology for live replacement of insulator strings, in particular to a method for live replacement of LF type joint plate insulators without operating holes. The present invention is directed to the LF type coupling plate without operating holes.

Background technique

The L-LF type refers to the assembly type of the insulator string, that is, the fittings at both ends of the 220kV line tensile-resistant double insulator use L-type coupling plates (cross-arm side) and LF-type coupling plates (conductor side) for coordinated installation. LF-type couplings are used. The main advantage of the board is that it can be directly connected to double split wires without adding additional connecting boards, thus reducing the amount of material used. The name of the LF type coupling plate is rectangular coupling plate. It is widely used on the line, but the forms are diverse. It is mainly reflected in: in addition to the four corners connected to the hardware, the board is also divided into operating holes and no operating holes, and hollows. and no cutouts.

The right holder of this invention once designed a tool for the oval hollow type LF coupling plate in 2013. This technology has been maturely applied on the line and achieved significant results. However, the oval hollow type LF coupling plate provides an oval slot for the clamp, but there is no operating hole. The LF coupling plate does not have any operating holes or hollows, and the existing clamps require sufficient fixing points and support points. , including the above-mentioned oval hollow type LF type coupling plate, can provide a support installation point. Therefore, the special form of LF type coupling plate without operating holes brings great inconvenience to maintenance. In 2015, when the annual insulator sampling inspection was carried out on the 220kV Lishen I and II lines, due to the use of LF type coupling plate insulators without operating holes The string assembly cannot be replaced by live work, making it impossible to detect and difficult to repair.

Contents of the invention

The object of the present invention is to provide a method for live replacement of LF type joint plate insulators without operating holes that can realize live replacement of insulators, is easy to operate, and has a simple structure based on the shortcomings of the existing technology.

The purpose of the present invention is achieved through the following approaches:

The key points of the live replacement method for LF type joint plate insulators without operating holes include the following steps:

The following replacement tools are provided, including front card, rear card, insulating rod and tightening screw rod. The rear card is a bending card; the front card includes a left card and a right card, the right card is a straight card, and the right card is a straight card. The free end is provided with a connecting portion; the left card is a curved fork plate card, including a card body and a chuck head. The middle of the fork plate card is an open fork slot, which extends from the card body to the chuck head. The bottom end of the fork slot is at At the junction of the left card and the right card, the chuck has a swinging head structure. The swinging head swings in the left front direction along the extension direction of the card body. The end of the card body close to the chuck is provided with a pin hole, and one end of the pin hole is outside. There is a pin sleeve on the side, and a latch with a spring component is installed in the pin sleeve. The latch is provided with an operating mechanism; an operating lifting ring is provided at the junction of the left card and the right card;

The electrician on the ground assembles and replaces the working tools, connects the free end of the right card in the front card to the front end of the insulating pull plate, returns the pin on the left card to the pin sleeve and pre-tightens the limit through the spring member, and tightens the wire The rod is installed on the rear end of the insulating pull plate, and one end of the right card is fixedly connected to the tightening screw rod;

Electrician #1 and Electrician #2 carry an insulating transfer rope up the tower to the corresponding working position on the cross arm. After each wears a safety belt, they hang up the insulating transfer rope together. The electrician on the ground passes the assembled replacement work tools and operating rod. Insulated transfer rope is passed up the tower to Electrician #1 and Electrician #2;

Electrician #1 holds the tightening screw rod, electrician #2 uses the operating rod to hook the operating lifting ring on the left card of the front card, and lifts the front card. The two of them cooperate with each other to guide the assembled replacement work tool from the side of the cross arm to the wire. Push sideways until the front card reaches the position above the LF-type coupling plate, and adjust the front card clamping head to align with the short side of the LF-type coupling plate;

Insert the front clamp between the two bolts on the short side of the LF-type coupling plate until the bottom end of the fork groove of the front clamp is close to the short side of the LF-type coupling plate, and the clamp head exposes the LF-type coupling plate On the long side, the card body is close to the bolts on the LF-type coupling plate. At this time, the front card is completely connected to the LF-type coupling plate.

Electrician #2 moves the operating lever away from the front card, and uses the operating lever to turn the operating mechanism on the latch. The latch breaks away from the restriction of the spring component and automatically inserts into the pin hole on the card body until the front card is installed in place;

Electrician #1 installs the rear card on the connecting plate on the side of the cross arm, tightens the tightening screw until the replacement work tool is under stress, checks that there are no abnormalities in the connecting parts of the tool, and continues to tighten the tightening screw to the insulator string Loose and finally replace the insulator string.

The swinging direction of the chuck of the present invention is opposite to the direction in which the right chuck extends toward the insulating operating rod (to the right). Originally, the left chuck body curves upward on the basis of the right chuck, and will no longer move upward when it reaches the chuck position. , instead swing the head directly to the left to form a Z-shaped curve structure. This structure can facilitate the introduction and docking operation of the fixture and the coupling plate, because the space between the upper and lower bolts on the short side of the coupling plate is extremely limited. The front card is a long-distance operating device, so it is difficult to operate with only a curved card. However, if a card with a smaller curvature is used, the curvature is not enough to cover the bolt, and the card body will become longer. This makes the support point unstable and the operation more inconvenient. Therefore, the chuck with a swing head structure of the present invention can solve the above problems, so that the chuck can more easily fork into the short side of the connecting plate.

The distance between the card body from the pin hole to the bottom end of the fork groove is exactly the distance from the short side of the LF coupling plate around one of the bolts to the long side. Therefore, when the front card of the present invention is installed, the bottom of the fork groove The end face is just in contact with the short side of the connecting plate, and the latch is limited to the long side of the connecting plate. The left card body is just half-packed with the bolt at that corner of the connecting plate, thus forming three supporting points: the fork The end face of the slot and the short plate of the connecting plate, the pin and the long side of the connecting plate, and the card body and bolts are mutually limited by three support points, thus completing the fixed connection between the front card and the LF type connecting plate and realizing the feasibility of live replacement of insulators. It is easy to operate and simple in structure. The invention effectively improves the ability of live work to eliminate equipment defects, expands the application scope of live work, has high operating efficiency, can effectively reduce line outage time, and improves the reliability of power grid operation.

The present invention is further specific as follows:

The front card chuck has a horn-shaped structure and extends outward from the connection point of the card body to form an outer horn-shaped shape.

Alternatively, the front card chuck has an inner trumpet structure, and its two side plates have an inner trumpet shape that gradually becomes thinner outward from the connection point of the card body. At this time, the outer side of the card head is extended by the same width as the card body.

The width of the fork groove on the card body is exactly suitable for the thickness of the LF type connecting plate. In order to further make it easier for the chuck to fork the connecting plate, the chuck can be made into an outer horn structure. In this structure, the chuck has Both side panels are opened outward, making the width of the fork groove at the chuck larger than the thickness of the LF coupling plate, making it easier to introduce and fork the coupling plate. The best choice is to use an inner horn structure, because in practical applications, the outer bell mouth has a curved surface and structure that protrudes from the card body, which is inconvenient to manufacture and operate; while the outer side of the chuck with an inner horn structure is in line with the The card body has the same width, but the width of the fork groove of the bell mouth is still larger than the thickness of the LF type coupling plate, so it can further facilitate the insertion of the coupling plate and avoid the above problems.

In summary, the present invention provides a method for live replacement of insulators of the LF type coupling plate without operating holes. It adopts a curved left card with a swing head, which can effectively realize the connection with the LF type coupling plate without operating holes. This further realizes the live replacement operation of LF-type plate insulator strings without operating holes, provides technical support for the detection and maintenance of such insulator strings, can effectively reduce line outage time, and improve the reliability of power grid operation.

Description of drawings

Figure 1 is a schematic structural diagram of a front card for live replacement of the LF type joint plate insulator without operating holes according to the present invention.

FIG. 2 is a cross-sectional view of the front card head portion of FIG. 1 taken along direction B; FIG. 3 is a top view of FIG. 1 .

Figure 4 is a schematic diagram of the connection between the replacement work tool and the connecting plate during the live replacement of the insulator string according to the present invention.

Detailed ways

Best practice:

Referring to the accompanying drawings 1 and 3, the front card for the live replacement operation of the LF type plate insulator without operating holes involved in the present invention includes a left card 1 and a right card 2. The right card 2 is a straight card, and the free end is The insulating operating rod 3 is connected. The left card 1 is a curved fork plate card, including a card body 11 and a chuck head 12. The middle of the fork plate card is an open fork slot 13, which extends from the card body 11 to the chuck head 12. The fork slot The bottom end face A of 13 is at the junction of the left card 1 and the right card 2. When the left card 1 is installed on the coupling plate 4, the bottom end face A is just in contact with the short side of the coupling plate 4.

Referring to Figure 1 and combined with Figure 2, the chuck 12 has a swing head structure, and the swing head swings in the left front direction along the extension direction of the card body. The card body 11 is curved upward on the basis of the right card 2. , when it reaches the chuck position, it no longer goes upward, but swings directly to the left to become the chuck, thus forming a Z-shaped curve structure. This structure can facilitate the introduction and docking operation of the chuck and the connecting plate, because the insulated operating rod and The short sides of the connecting plate are parallel, and although the right card is perpendicular to both, the card body of the left card is also parallel to the two after bending upward. At this time, the card head swinging to the left can form a close gap with the short side of the connecting plate. An angle of 90 degrees, so when the clamp approaches the coupling plate from the right side, the chuck can be introduced in a direction that is nearly perpendicular to the short side of the coupling plate, thereby achieving docking with the coupling plate. The chuck has an inner trumpet structure, and its two side plates have an inner trumpet shape that gradually becomes thinner outward from the connection point of the card body. At this time, the inner side has a slope structure extending outward from the connection point of the card body. Therefore, the width of the card head gradually becomes wider outward from the connection point of the card body. At this time, the outer side of the card head is the same width as the card body.

Referring to Figure 3, one end of the card body close to the chuck is provided with a pin hole 5, and one end of the pin hole has a pin sleeve 6 on the outer surface. A latch with a spring component is installed in the pin sleeve 6, and an operating mechanism 7 is provided on the latch; left A lifting ring 8 is provided on the card or the right card.

Referring to Figure 4, the live replacement operation method of the LF type joint plate insulator without operating holes includes the following steps:

The following replacement tools are provided, including front card K1, rear card K2, insulating pull rod K3 and tightening screw rod K3. The rear card is a bending card; there is an operating lifting ring at the junction of the left card and the right card in the front card. ;

The electrician on the ground assembles and replaces the working tools, connects the free end of the right card in the front card to the front end of the insulating pull plate, returns the pin on the left card to the pin sleeve and pre-tightens the limit through the spring member, and tightens the wire The rod is installed on the rear end of the insulating pull plate, and one end of the right card is fixedly connected to the tightening screw rod;

Electrician #1 and Electrician #2 carry an insulating transfer rope up the tower to the corresponding working position on the cross arm. After each wears a safety belt, they hang up the insulating transfer rope together. The electrician on the ground passes the assembled replacement work tools and operating rod. Insulated transfer rope is passed up the tower to Electrician #1 and Electrician #2;

Electrician #1 holds the tightening screw rod, electrician #2 uses the operating rod to hook the operating lifting ring on the left card of the front card, and lifts the front card. The two of them cooperate with each other to guide the assembled replacement work tool from the side of the cross arm to the wire. Push sideways until the front card reaches the position above the LF-type coupling plate, and adjust the front card clamping head to align with the short side of the LF-type coupling plate;

Insert the front clamp between the two bolts on the short side of the LF-type coupling plate until the bottom end of the fork groove of the front clamp is close to the short side of the LF-type coupling plate, and the clamp head exposes the LF-type coupling plate On the long side, the card body is close to the bolts on the LF-type coupling plate. At this time, the front card is completely connected to the LF-type coupling plate.

Electrician #2 moves the operating lever away from the front card, and uses the operating lever to turn the operating mechanism on the latch. The latch breaks away from the restriction of the spring component and automatically inserts into the pin hole on the card body until the front card is installed in place;

Electrician #1 installs the rear card on the connecting plate on the side of the cross arm, tightens the tightening screw until the replacement work tool is under stress, checks that there are no abnormalities in the connecting parts of the tool, and continues to tighten the tightening screw to the insulator string Loose and finally replace the insulator string.

After the front card is installed, the bottom end surface of the fork groove is just in contact with the short side of the coupling plate, and the latch is limited to the long side of the coupling plate. The body of the left card is exactly close to the bolt at that corner of the coupling plate. This forms three support points: the bottom end of the fork groove and the short plate of the coupling plate, the latch and the long side of the coupling plate, and the card body and the bolt. The three support points mutually limit each other, thus completing the fixed connection between the front card and the LF coupling plate. The invention solves the problem that the insulator string on the LF type coupling plate without operating holes is difficult to replace while live, expands the application scope of live work, effectively reduces line outage time, and improves the reliability of power grid operation.

The parts not described in the present invention are the same as those in the prior art.

Claims (3)

1. The live replacement operation method of the LF type yoke plate insulator without the operation hole is characterized by comprising the following steps of:

the method comprises the following steps of providing a replacing operation tool, comprising a front clamp, a rear clamp, an insulating pull rod and a wire tightening screw rod, wherein the rear clamp is a bending clamp; the front card comprises a left card and a right card, the right card is a straight board card, and the free end part of the right card is provided with a connecting part; the left clamp is an arc-shaped fork plate clamp and comprises a clamp body and a clamp head, an opening fork groove is formed in the middle of the fork plate clamp, the fork groove extends to the clamp head from the clamp body, the bottom end face of the fork groove is positioned at the junction of the left clamp and the right clamp, the clamp head is of a swinging head structure, the swinging head swings to the left front side direction along the extending direction of the clamp body, a pin hole is formed in one end, close to the clamp head, of the clamp body, a pin bush is arranged on the outer side face of one end of the pin hole, a bolt with a spring component is arranged in the pin bush, and an operating mechanism is arranged on the bolt; an operation hanging ring is arranged at the junction of the left card and the right card;

the ground electrician assembles the replacement working tool, connect the connecting portion of the free end of right card in the front card with front end of the insulating pulling plate, the bolt on the left card body withdraws back into the pin sleeve and is pre-tightened and limited through the spring component, the wire tightening screw rod is mounted on rear end of the insulating pulling plate, an end of the right card is fixedly connected with wire tightening screw rod;

the electrician #1 and the electrician #2 carry an insulation transmission rope to climb the tower to the corresponding working positions on the cross arm, after the safety belts are respectively fastened, the insulation transmission rope is hung in a matched mode, and the ground electrician transfers the assembled replacement working tool and the assembled operation rod to the tower through the insulation transmission rope to the electrician #1 and the electrician # 2;

the wire tightening screw rod is held by an electrician #1, an operation rod is used for hooking an operation hanging ring on the left clamp of the front clamp by the electrician #2, the front clamp is lifted, the two persons are matched with each other to push the assembled replacement operation tool from the side of the cross arm to the side of the wire until the front clamp reaches the position above the LF type connecting plate, and the clamp head of the front clamp is adjusted to be aligned with the short side of the LF type connecting plate;

the front clamp is inserted between two bolts at one side of the short side of the LF type yoke plate until the bottom end surface of the front clamp fork groove is close to the short side of the LF type yoke plate, the long side of the LF type yoke plate is exposed by the clamping head, the clamping body is close to the bolts on the LF type yoke plate, at the moment, the front clamp is completely connected with the LF type yoke plate in a fork manner,

the electrician #2 removes the operating lever from the front card, and uses the operating lever to dial the operating mechanism on the bolt, the bolt breaks away from the limit of the spring component and inserts the pinhole on the card body automatically, the front card is mounted in place up to this point;

and the #1 electrician installs the rear clamp on the yoke plate at the side of the cross arm, operates the wire tightening screw rod until the replacement working tool is in a stressed state, checks that the connection parts of the tool are not abnormal, continues to loosen the wire tightening screw rod to the insulator string, and finally the #1 electrician and the #2 electrician are matched to replace the insulator string.

2. The method for live replacement of an LF-type yoke plate insulator without an operation hole according to claim 1, wherein the chuck has a horn-type structure, and the joint of the chuck body extends outward to form an outer horn-type shape.

3. The method for live replacement of LF-type yoke plate insulator without operation hole according to claim 1, wherein the chuck has an inner horn structure, and the two side plates of the chuck have an inner horn shape gradually thinned from the joint of the chuck body to the outside.