CN102457036A - Grounding wire of overhead power transmission line - Google Patents

Abstract

The invention relates to a grounding wire for an overhead power transmission line, which includes a grounding clip (6), an insulating rope (4), an annealed copper wire (5), and a spring hook (1), where one end of the annealed copper wire (5) is connected On the spring hook head (1), the other end is connected to the grounding chuck (6). The grounding chuck (6) is fixed on the pole tower or the grounding electrode buried in the ground. The spring hook head (1) is clamped on the wire Above; the hook head turning mechanism (3) is arranged under the spring hook head (1), and two insulating ropes (4) are respectively connected to the upper handle of the spring hook head (1) and the hook head turning mechanism (3); The invention effectively solves the problem of difficult connection of the grounding wire of the 220-500kV high-voltage overhead line, and increases the degree of freedom of the wire end controlled by the operator from the existing three to more than five.

Description

Overhead transmission line grounding wire

technical field

The invention relates to a grounding wire of an overhead transmission line, in particular to a grounding wire of a high-voltage overhead transmission line.

Background technique

When the high-voltage overhead transmission line is powered off for maintenance, the maintenance party must hang ground wires at both ends of the maintenance area to protect the maintenance area from the danger of sudden calls. Composed of copper wire and wire clip, the wire clip includes a spring clip and a clip tongue. When using it, ground the grounding clip first, then use the clip tongue to spread the spring clip, and finally put down the wire clip with an insulating rope, and try to make the clip tongue touch The wire falls off, clamp the wire, and complete the steps of installing the ground wire. When removing it, pull up the insulating rope firmly to separate the spring clip from the wire.

However, the wire clips used to connect the grounding wires to the wires are laborious to install and disassemble, and because they can only control the three degrees of freedom of moving in the vertical direction and rotating in the direction of the line and the horizontal line during installation, when installing the grounding wire Since the degree of freedom of rotation in the vertical direction cannot be controlled, it is difficult for the wire clamp to clamp the wire, so you can only try to touch the wire, such as installing the ground wire when there is wind, and the freedom of movement along the direction of the line, the direction of the horizontal line, and the direction vertical to the ground The three degrees of freedom of the rotation degree of freedom cannot be controlled, which is time-consuming and labor-intensive, and causes great difficulties in installing the grounding wire.

Contents of the invention

The purpose of the present invention is to develop a new type of grounding wire for overhead transmission lines, to design the connection mode between the grounding wire and the conductor, and to realize the control of the degree of freedom of the conductor end when the grounding wire is installed.

The technical solution of the present invention is: the grounding wire of the overhead power transmission line, including the grounding clip, the insulating rope, and the annealed copper wire. On the grounding chuck, the grounding chuck is fixed on the pole tower or the grounding electrode buried in the ground, and the spring hook is clamped on the wire; the hook turning mechanism is arranged under the spring hook, and the two insulating ropes are respectively connected to the On the upper shank of the spring hook and on the hook turning mechanism.

Two arc-shaped elastic tongues are arranged in the hook body U-shaped groove above the spring hook head, and one end of the elastic tongue is connected to the inner side wall of the U-shaped groove opening end through a pin shaft, and a tension spring is stuck on the tongue body and the elastic tongue. Between the inner side walls of the U-shaped groove, the tension spring is connected to the hook body of the spring hook head through a pin shaft, and the other end of the elastic tongue protrudes from the bottom of the U-shaped groove of the hook body and is connected to one end of a soft copper strip. The other end of the belt is connected to the outer wall of the side U-shaped groove, and the tension spring separates the tongue body of the elastic tongue from the inner wall of the U-shaped groove, and an elastic card is formed between the two elastic tongues to hold the wire; on the spring hook There is a through hole perpendicular to the end face on the bottom end surface of the U-shaped groove below the head for installing the hook turning mechanism; there is a connecting hole for an insulating rope on the shank above the spring hook head.

The hook turning mechanism is a U-shaped card with a cross hook at the opening end, and the cross hook at the opening end is inserted into the two end face holes of the bottom end face through hole of the U-shaped groove below the spring hook head, and can rotate around the axis of the through hole , There is a transverse limit bar inside the U-shaped card of the hook head turning mechanism, the middle part of the limit bar is disconnected, and the insulating rope is tied to the arc part of the U-shaped card.

The beneficial effects of the present invention are: changing the connection mode of the grounding wire and the conductor can effectively solve the problem of difficult connection of the grounding wire of the 220-500kV high-voltage overhead line, and improve the degree of freedom of the conductor end controlled by the operator from the existing three If there are more than five, the degree of freedom of movement along the line is not controlled, because the installation position of the grounding wire is relatively loose, so that it is easy to mount and dismantle, and it has stronger controllability, so as to achieve the purpose of convenience, labor saving and safety . It is widely used in high-voltage overhead line power outage maintenance work, reduces labor intensity, improves labor efficiency, and is used as an upgrade substitute for existing grounding wires.

Description of drawings

Fig. 1: Schematic diagram of the structure of the present invention;

Figure 2: Structural diagram of the spring hook head;

Figure 3: Schematic diagram of the structure of the hook head turning mechanism;

Figure 4: The connection structure diagram of the spring hook head and the hook head turning mechanism;

Figure 5: Schematic diagram of the position of the hook head turning mechanism of the present invention when turning over.

In the figure: 1-spring hook head; 2-elastic tongue; 3-hook turning mechanism; 4-insulating rope; 5-soft copper wire; 6-grounding chuck; 7-soft copper strip; 8-tension spring; -connecting screw; 10-pin shaft; 11-compression screw.

Detailed ways

As shown in Fig. 1, the present invention comprises snap hook head 1, ground chuck head 6, insulating rope 4, annealed copper wire 5; part, the other end of the annealed copper wire 5 is connected to the grounding chuck 6 through the connecting screw 9, and the part where the two ends of the annealed copper wire 5 is connected with the snap hook head 1 and the grounding chuck 6 is made into a wired joint; the grounding chuck 6 Fixed on the pole tower or the ground electrode buried in the ground; the hook head turning mechanism 3 is arranged under the spring hook head 1, and the two insulating ropes 4 are respectively connected to the upper handle of the spring hook head 1 and the hook head turning mechanism 3 .

The spring hook head 1 is made of high-quality aluminum alloy die-casting, or it is made of copper material, and the matching fasteners are all chrome-plated metal, which has good electrical conductivity. The wire is covered with a soft, high-temperature-resistant transparent insulating layer, and the insulating rope is flexible, firm, and reliable in insulation.

Figure 2 is a structural diagram of the spring hook head. The hook body of the spring hook head 1 is a U-shaped groove, and two elastic tongues 2 are arranged in the U-shaped groove, which is a double-tongue structure. The tongue body of the elastic tongue 2 is arc-shaped, elastic One end of the tongue body of the tongue 2 is connected to the inner side wall of the U-shaped groove opening end of the hook body above the spring hook head 1 through a pin shaft 10, and a tension spring 8 is connected to the hook body of the spring hook head 1 through a pin shaft 10 and stuck on the elastic tongue 2 Between the tongue body of the spring hook head 1 and the inner side wall of the hook body of the spring hook head 1, the tension spring 8 separates the tongue body of the elastic tongue 2 from the inner wall of the U-shaped groove of the hook body of the spring hook head 1, thereby separating the two elastic tongues 2 The other end of the tongue body of the elastic tongue 2 protrudes from the bottom of the U-shaped groove, and is connected to a soft copper strip 7, and the other end of the soft copper strip 7 is connected to the outer wall of the U-shaped groove on this side Above, the two ends of the annealed copper strip 7 have plate-shaped wire joints and are respectively connected to the tongue body end of the elastic tongue 2 and the outer wall of the U-shaped groove of the elastic hook head 1 through the compression screw 11, and the annealed copper strip 7 is used to make the The elastic tongue 2 and the spring hook head 1 form a reliable electrical path, and the gap between the two elastic tongues 2 can be adjusted by the length of the soft copper strip 7 to adapt to different wire diameters to obtain corresponding clamping force; There is a connecting hole at the shank above the head 1, which is convenient for connecting the insulating rope 4; there is a through hole perpendicular to the end face on the bottom end surface of the U-shaped groove below the spring hook head 1, which is used to install the hook head turning mechanism 3.

As shown in Figure 3, it is a schematic structural diagram of the hook head turning mechanism. The hook turning mechanism 3 is a U-shaped card with a horizontal hook at the opening end, and the cross hook at the opening end is inserted into two through holes on the bottom end surface of the U-shaped groove below the spring hook head 1. In the hole of the end face, and can rotate around the axis of the through hole, there is a transverse limit rod inside the U-shaped card of the hook head turning mechanism 3; In the two end faces of the through hole at the bottom of the U-shaped groove below the hook head 1; the insulating rope 4 is tied to the arc part of the U-shaped card; when the insulating rope 4 tied on the U-shaped card is pulled, the hook head turning mechanism 3 Rotate around its horizontal hook, when turning to a certain angle, the limit lever will touch the U-shaped groove outer wall of the spring hook head 1, stop rotating, continue to pull the insulating rope 4 spring hook head 1 will be in common with the hook head turning mechanism 3 The rotation causes the position of the spring hook head 1 to be reversed, thereby changing the direction of the force exerted by the insulating rope 4 on the bottom of the spring hook head 1; Head turning mechanism 3 rotates to get final product close to horizontal position. As shown in Fig. 4, it is a connection structural diagram of the spring hook head 1 and the hook head turning mechanism 3; as shown in Fig. 5 , a schematic diagram of the position of the hook turning mechanism during turning over.

When installing a grounding wire on an overhead transmission line, first securely clamp the grounding clip 6 to the angle iron of the metal pole or tower or connect it to the grounding electrode buried in the ground, and use the insulating rope 4 to hold the spring hook from a high place. 1. Put it down slowly. When the spring hook head 1 is close to the wire, adjust the two insulating ropes 4 so that the U-shaped opening of the spring hook head 1 is aligned with the wire that needs to be grounded. At this time, you can control the vertical movement, along the line and the horizontal line. There are five degrees of freedom of rotation in one direction, movement in the direction of the horizontal line, and rotation in the vertical direction. There is no vertical rotation and movement in the direction of the horizontal line, so it is easy to clamp the spring hook head 1 on the wire to achieve grounding; The insulating rope 4 allows the spring hook head turning mechanism 3 to move, so that the spring hook head 1 is turned over 180 degrees, and the opening of the spring hook head 1 is downward, and the grounding wire can be removed easily and smoothly by pulling the insulating rope 4 upwards.

Claims (3)

1. The grounding wire of the overhead power transmission line includes the grounding clip (6), the insulating rope (4), and the annealed copper wire (5). Connected to the spring hook head (1), the other end is connected to the grounding chuck (6), the grounding chuck (6) is fixed on the pole tower or the grounding electrode buried in the ground, and the spring hook head (1) is clamped on On the wire; a hook turning mechanism (3) is provided below the spring hook head (1), and two insulating ropes (4) are respectively connected to the upper handle of the spring hook head (1) and the hook turning mechanism (3) . 2. The ground wire of overhead power transmission line according to claim 1, characterized in that: two arc-shaped elastic tongues (2) are arranged in the U-shaped groove of the hook body above the spring hook head (1), and the elastic tongues ( 2) is connected to the inner sidewall of the U-shaped groove opening through a pin shaft (10), and a tension spring (8) is stuck between the tongue body of the elastic tongue (2) and the U-shaped groove inner sidewall, and the tension spring (8 ) is connected to the hook body of the spring hook head (1) by the pin shaft (10), and the other end of the elastic tongue (2) stretches out from the bottom of the U-shaped groove of the hook body, and is connected to an end of a soft copper strip (7), The other end of soft copper band (7) is connected on the lateral wall of this side U-shaped groove, and tension spring (8) separates the tongue body of elastic tongue (2) and the inboard wall of U-shaped groove, between two elastic tongues ( 2) An elastic clip is formed to clamp the wires; there is a through hole perpendicular to the end surface at the bottom end surface of the U-shaped groove below the spring hook head (1) for installing the hook head turning mechanism (3); on the spring hook head (1) 1) There is a connection hole for an insulating rope (4) on the upper handle. 3. The ground wire of overhead power transmission line according to claim 1, characterized in that: the hook turning mechanism (3) is a U-shaped clip with a horizontal hook at the opening end, and the horizontal hook at the opening end is snapped into the spring hook head (1 ) in the two end face holes of the end face through hole at the bottom of the U-shaped groove below, and can rotate around the axis of the through hole. There is a transverse limit rod inside the U-shaped card of the hook head turning mechanism (3). Disconnect, the insulating rope (4) is tied to the U-shaped arc part of the hook turning mechanism (3).

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