CN104348111A - Lead backup protection device for live replacement of tension insulator string, and mounting method thereof - Google Patents

Abstract

The invention relates to a backup protection device for live replacement of tension insulator string conductors and an installation method thereof. There is a connecting hook on the wire groove installation base plate, and a first pull arm is respectively hinged on the left and right sides of the lower side, and a wire clamping block is respectively hinged on the first pull arms on both sides to form a wire clamp groove, and the front end of the first pull arm It is hinged with the second pull arm, the front ends of the two second pull arms are hinged and the U-shaped ring is hinged at the same time; the automatic locking spring and the width limiting device are connected between the two second pull arms to fix the stretching width of the spring; the insulating pull rope The two ends are respectively connected to the pole tower and U-shaped ring, the first operating rod is connected to the connecting hook, the second operating rod is connected to the width limiting device, the wire clamping slot is inserted into the wire and the width limiting device is opened, the automatic locking spring shrinks and drives the clamping block Jammed wires. The device and its installation method improve the safety and reliability of live work, and are easy to install and implement.

Description

Live replacement strain insulator string backup protection device and its installation method

technical field

The invention relates to the technical field of power transmission line construction, in particular to a backup protection device for live replacement of tension insulator string conductors and an installation method thereof. the

Background technique

At present, most of the operations of replacing strain insulator strings are carried out when the backup protection device is not used for the transmission line conductors, or the backup protection device for the conductors of the simple clamping device is used. In the above two cases, there are serious safety hazards in the operation. Hidden danger, once the replacement tool falls off or is damaged, it will cause a wire breakage accident. In the prior art, some backup protection devices and methods for replacing tension insulator strings are also disclosed, but most of these devices have complex structures, difficult installation methods, low work efficiency, and unsatisfactory protection effects and poor use effects. the

Contents of the invention

The object of the present invention is to provide a backup protection device for live replacement of strain insulator string conductors and its installation method. The device and its installation method not only improve the safety and reliability of live work, but also have a simple structure and are easy to install and implement.

In order to achieve the above object, the technical solution of the present invention is: a backup protection device for live replacement of strain insulator string wires, including an airfoil clamp, an insulating pull rope, a first operating lever and a second operating lever; the airfoil The wire clamping device includes a wire clamping groove installation base plate, the upper side of the wire clamping groove installation base plate is provided with a first connecting hook for connecting the first operating rod, and the left and right sides of the lower side are respectively connected with a first pull arm rear The ends are hinged, and the first pull arms on the left and right sides are respectively hinged with a clamping block to form a clamping groove through the clamping blocks on the left and right sides. The front ends of the first pull arms on the left and right sides are respectively It is hinged with the rear end of a second pull arm, and the front ends of the second pull arms on the left and right sides are hinged. The hinge point is also hinged with a U-shaped ring for connecting the insulating pull rope; the second pull arms on the left and right sides are hinged. The arms are connected with an automatic locking spring and a width limiting device, so that when the width limiting device is closed, the opening width of the automatic locking spring is fixed. When the width limiting device is opened, the automatic locking spring automatically contracts and drives the clamping block to lock Wire; one end of the insulating stay rope is connected to the pole tower, the other end is connected to the U-shaped ring, and the first operating rod is connected to the first connecting hook to lift the airfoil wire clamp to the wire , the second operating lever is connected with the width limiting device, so that when the wire is clamped into the wire slot, the width limiting device is opened through the second operating lever.

Further, the first connecting hook is composed of two question mark-shaped hooks arranged side by side, the first operating rod is composed of a straight rod and a mountain-shaped hook head arranged at the front end of the straight rod, and the mountain-shaped hook head passes through It is arranged between the two hooks and hooks the two hooks to the left and right sides.

Further, the hook at one end of the automatic locking spring is hung on the spring loading and unloading buckle, and the spring loading and unloading buckle is installed on the second pull arm on one side, and the connecting ring at the other end of the automatic locking spring is sleeved on the spring to fix it. On the buckle, the spring fixing buckle is installed on the second pull arm on the other side.

Further, the width-limiting device includes a width-limiting pull rod and a bolt, the width-limiting pull rod is hinged on the second pull arm on one side, and the bolt is hinged on the second pull arm on the other side, the A bayonet is provided on the width-limiting pull rod, so that when the bayonet on the width-limiting pull rod is snapped into the latch, the expansion width of the automatic locking spring is fixed; the second operating rod is connected with the width-limiting pull rod to hold After the wire slot is snapped into the wire, the width-limiting pull bar is opened by the second operating lever.

Further, the width-limiting pull rod is provided with a pull ring for connecting to the second operating rod, so as to open the width-limiting pull rod through the operation of the second operating rod.

Further, the second operating rod is composed of a straight rod and a hook head in the shape of a question mark arranged at the front end of the straight rod.

Further, a second connecting hook is provided on the first pull arm on one side.

The present invention also discloses an installation method of the above-mentioned backup protection device for live replacement of tension insulator string conductors, which includes the following steps:

(1) Close the width limiting device to fix the opening width of the automatic locking spring; at the same time, connect the two ends of the automatic locking spring to the second pull arms on the left and right sides respectively, and keep a certain tension force;

(2) Reliably connect one end of the insulating rope to the U-shaped ring;

(3) Use the first operating lever to hook the first connecting hook of the wire clamp, and lift the airfoil wire clamp to the wire;

(4) Insert the wing clamp into the wire;

(5) Use the second operating lever to open the width limiting device. At this time, the second pull arm is retracted inwardly under the contraction of the automatic locking spring, thereby driving the first pull arm and the clamping block on it to retract inwardly , clamp the wire;

(6) Fasten the other end of the insulating stay rope to the pole tower and maintain a certain tension, so far complete the installation of the backup protection device for live replacement of tension insulator string conductors.

The beneficial effect of the present invention is to provide a backup protection device for live replacement of tension insulator string wires and its installation method. By setting an automatic locking device composed of an automatic locking spring and a width limiting device on the airfoil wire gripper, during operation In the event of falling off or damage, the automatic locking device will lock automatically to prevent the wire from falling off and disconnecting, thus improving the safety and reliability of the operation. In addition, the device has a simple structure, is easy to construct, improves work efficiency, and has strong practicability.

Description of drawings

Fig. 1 is a top view of an airfoil wire gripper in an embodiment of the present invention.

Fig. 2 is a bottom view of the airfoil wire gripper in the embodiment of the present invention.

Fig. 3 is a schematic structural diagram of the first operating lever in the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the second operating lever in the embodiment of the present invention.

In the figure, 1-clamping block, 2-automatic locking spring, 3-width-limiting tie rod, 4-U-shaped ring, 5-spring loading and unloading buckle, 6-first pull arm, 7-connecting bolt, 8-first connection Hook, 9-spring fixing buckle, 10-bolt, 11-wire slot installation base plate, 12-second pull arm, 13-second connecting hook, 14-pull ring, 15-hook, 16-connecting ring, 17 -Hook in the shape of a question mark, 18-straight rod, 19-chevron-shaped hook head, 20-straight rod, 21-hook head in the shape of a question mark.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The live replacement tension insulator string backup protection device of the present invention includes an airfoil clamp, an insulating pull cord, a first operating lever and a second operating lever; as shown in Figures 1 and 2, the wing clamp includes a clamp The wire groove installation base plate 11, the upper side of the wire groove installation base plate 11 is provided with the first connecting hook 8 for connecting the first operating rod, and the left and right sides on the lower side are respectively hinged with the rear end of a first pull arm 6 , the first pull arms 6 on the left and right sides are respectively hinged with a clamping block 1 to form a clamping groove through the clamping blocks 1 on the left and right sides; the front ends of the first pull arms 6 on the left and right sides Respectively hinged with the rear end of a second pull arm 12, the front ends of the second pull arm 12 on the left and right sides are hinged, and the hinge point is hinged with a U-shaped ring 4 for connecting a high-strength insulating stay rope at the same time; An automatic locking spring 2 and a width limiting device are connected between the second pull arms 12 on both sides, so as to fix the stretching width of the automatic locking spring 2 when the width limiting device is closed, and automatically lock the spring when the width limiting device is opened. 2 automatically shrinks and drives the clamping block 1 to clamp the wire. One end of the insulating stay rope is connected to the pole tower, the other end is connected to the U-shaped ring 4, the first operating rod is connected to the first connecting hook 8, so as to lift the airfoil clamp to the wire, the second operating rod is connected to the width limiting The device is connected to open the width limiting device through the second operating lever after the wire is clamped into the wire clamping groove.

220kV, 110kV transmission lines have a single wire diameter of 300-400mm, and the tension resistance of the wire is generally greater than 3 tons. The wire diameter is 300~400mm, the maximum bearing capacity of high-strength insulating rope is 6 tons, and the operating rod meets the requirements of 220kV voltage level insulation performance and insulation effective length.

As shown in Figures 1 and 3, the first connecting hook 8 is composed of two question mark-shaped hooks 17 arranged side by side. The glyph hook head 19 is set between the two hooks 17 and hooks the two hooks 17 to the left and right sides.

In this embodiment, the hook 15 at one end of the automatic locking spring 2 is hung on the spring loading and unloading buckle 5, the spring loading and unloading buckle 5 is installed on the second pull arm 12 on one side, and the connecting ring 16 sets at the other end of the automatic locking spring 2 It is arranged on the spring fixing buckle 9, and the spring fixing buckle 9 is installed on the second pull arm 12 on the other side.

The width limiting device comprises a width limiting pull rod 3 and a bolt 10, the width limiting pull rod 3 is hinged on the second pull arm 12 on one side, the latch 10 is hinged on the second pull arm 12 on the other side, and the width limiting pull rod 3 is hinged on the second pull arm 12 on the other side. A bayonet is provided to fix the stretching width of the automatic locking spring 2 when the bayonet on the width-limiting pull rod 3 is inserted into the latch 10 . A pull ring 14 for connecting the second operating rod is provided on the width-limiting pull rod 3 . The second operating lever is connected with the pull ring 14 of the width-limiting pull rod 3, so that when the wire is snapped into the wire slot, the width-limiting pull rod 3 is opened through the operation of the second operating lever. As shown in FIG. 4 , the second operating rod is composed of a straight rod 20 and a hook head 21 in the shape of a question mark arranged at the front end of the straight rod 20 .

In this embodiment, the first pull arm 6 on one side is also provided with a second connecting hook 13 for connecting the third operating lever, so as to assist the operation of the third operating lever to snap the wire clamp into the wire, or After the operation is finished, the first pull arm and the clamping block on it are driven by the third operating rod through the second connecting hook to open the wire.

The present invention also discloses an installation method of the above-mentioned backup protection device for live replacement of tension insulator string conductors, which includes the following steps:

(1) Close the width limiting device to fix the opening width of the automatic locking spring; at the same time, connect the two ends of the automatic locking spring to the second pull arms on the left and right sides respectively, and keep a certain tension force. Specifically, at first the bayonet on the width-limiting pull rod 3 is snapped into the latch 10 to fix the stretching width of the automatic locking spring 2; then the spring fixing buckle 9 is opened, so that the hook 15 at one end of the automatic locking spring 2 can easily The ground hangs to buckle the spring loading and unloading buckle 5; then close the spring fixing buckle 9, thereby tightening the automatic locking spring 2 to keep a certain tension.

(2) Connect one end of the high-strength insulating rope to the U-shaped ring 4 reliably.

(3) The operator stands at the cross arm of the pole tower, hooks the first connecting hook 8 of the wire clamp with the first operating lever, and lifts the airfoil wire clamp to the wire. At this time, the clamp of the airfoil wire clamp The trunking is open.

(4) Insert the wing clamp into the wire.

(5) Use the second operating lever to open the width-limiting device, that is, use the second operating lever to hook the pull ring 14 on the width-limiting pull rod 3, and open the width-limiting pull rod 3. At this time, the second pull arm 12 automatically locks the spring 2 Under the action of contraction, the first pull arm 6 and the clamping block 1 on it are retracted inwardly to tighten the wire.

(6) Fasten the other end of the high-strength insulating stay rope to the pole tower and maintain a certain tension, so far complete the installation of the backup protection device for live replacement of tension insulator string conductors.

At this time, even if the high-strength insulating stay rope is loose, the wing-shaped wire clamp will tightly clamp the transmission line conductor under the action of the automatic locking spring.

The above are the preferred embodiments of the present invention, and all changes made according to the technical solution of the present invention, when the functional effect produced does not exceed the scope of the technical solution of the present invention, all belong to the protection scope of the present invention. the

Claims (8)

1. A backup protection device for live replacement of strain insulator string wires, characterized in that it includes an airfoil clamp, an insulating stay rope, a first operating lever and a second operating lever; the wing clamp includes a clamping wire The groove is installed on the substrate, and the upper side of the wire clamping groove is installed with a first connecting hook for connecting the first operating rod. The left and right sides of the lower side are respectively hinged with the rear end of a first pull arm. The first pull arms on the right sides are respectively hinged with a clamping block to form a clamping groove through the clamping blocks on the left and right sides, and the front ends of the first pull arms on the left and right sides are respectively connected with a second pull arm The rear ends are hinged, and the front ends of the second pull arms on the left and right sides are hinged. The hinge point is also hinged with a U-shaped ring for connecting the insulating pull rope; the second pull arms on the left and right sides are connected with automatic The locking spring and the width-limiting device are used to fix the stretching width of the automatic locking spring when the width-limiting device is closed, and when the width-limiting device is opened, the automatic locking spring automatically shrinks and drives the clamping block to clamp the wire; the insulation pull One end of the rope is connected to the tower, the other end is connected to the U-shaped ring, the first operating rod is connected to the first connecting hook to lift the airfoil wire clamp to the wire, and the second operation The rod is connected with the width limiting device, so that when the wire clamping slot is clamped into the wire, the width limiting device is opened by the second operating rod. 2. The live replacement tension insulator string conductor backup protection device according to claim 1, characterized in that, the first connecting hook is composed of two question mark-shaped hooks arranged side by side, and the first operating lever is composed of a straight The rod and the gable-shaped hook head arranged at the front end of the straight rod are formed. The gable-shaped hook head is passed between the two hooks and hooks the two hooks to the left and right sides. 3. The live replacement tension insulator string backup protection device according to claim 1, characterized in that, the hook at one end of the automatic locking spring is hung on the spring loading and unloading buckle, and the spring loading and unloading buckle is installed on one side On the second pull arm, the connecting ring at the other end of the automatic locking spring is sleeved on the spring fixing buckle, and the spring fixing buckle is installed on the second pull arm on the other side. 4. The backup protection device for live replacement of strain insulator string conductors according to claim 3, wherein the width limiting device comprises a width limiting pull rod and a bolt, and the width limiting pull rod is hinged to the second On the pull arm, the bolt is hinged on the second pull arm on the other side, and a bayonet is provided on the width-limiting pull rod, so that when the bayonet on the width-limiting pull rod snaps into the bolt, the support of the automatic locking spring is fixed. Width opening; the second operating lever is connected with the width-limiting pull rod, so that when the wire is clamped into the wire slot, the width-limiting pull rod can be opened through the second operating rod. 5. The live replacement tension insulator string backup protection device according to claim 4, characterized in that, the width-limiting pull rod is provided with a pull ring for connecting to the second operating rod, so that the operation of the second operating rod Open the width limiter lever. 6 . The backup protection device for live wire replacement of tension insulator strings according to claim 5 , wherein the second operating rod is composed of a straight rod and a hook head in the shape of a question mark arranged at the front end of the straight rod. 7 . 7. The backup protection device for live wire replacement of tension insulator strings according to claim 1, characterized in that a second connecting hook is provided on the first pull arm on one side. 8. According to claim 1, 2, 3, 4, 5, 6 or 7, the installation method of the backup protection device for live replacement of tension insulator string conductors is characterized in that it comprises the following steps: (1) Close the width limiting device to fix the opening width of the automatic locking spring; at the same time, connect the two ends of the automatic locking spring to the second pull arms on the left and right sides respectively, and keep a certain tension force; (2) Reliably connect one end of the insulating rope to the U-shaped ring; (3) Use the first operating lever to hook the first connecting hook of the wire clamp, and lift the airfoil wire clamp to the wire; (4) Insert the wing clamp into the wire; (5) Use the second operating lever to open the width limiting device. At this time, the second pull arm is retracted inwardly under the contraction of the automatic locking spring, thereby driving the first pull arm and the clamping block on it to retract inwardly , clamp the wire; (6) Fasten the other end of the insulating stay rope to the pole tower and maintain a certain tension, so far complete the installation of the backup protection device for live replacement of tension insulator string conductors.