CN204441005U - Twin insulator strings lightning protection inter space arcing horn - Google Patents

Abstract

The utility model relates to an arcing angle for lightning protection gaps of double insulator strings, which is composed of two arcing angles at cross-arm ends, two right-angle hanging plates, two arcing angles at wire ends, and two cross hanging plates; The arc angle at the cross-arm end and the arc angle at the wire end are made of round steel; the arc angle at the two cross-arm ends is symmetrically distributed, the arc angle at the two wire ends is symmetrically distributed, and the two The section formed by the arc angle at the cross-arm end is W-shaped with a straight line in the middle, and two right-angle hanging plates are connected to the straight line; one end of the arc angle at the cross-arm end is connected with the right-angle hanging plate and connected in series to the insulator string middle. The beneficial effects of the utility model are as follows: first, the use of additional hanging boards, so that the installation and replacement of the arcing angle are simpler and faster without relying on the connection holes connected with the hardware in the insulator string; second, the arcing angle is connected by double holes , to avoid the gap change caused by the rotation of the arc angle in the line, so that the operation is more stable.

Description

Arcing Angle of Lightning Protection Gap of Duplex Insulator Strings

technical field

The utility model belongs to the technical field of lightning protection gap arc angles, in particular to a lightning protection gap arc angle of double insulator strings.

Background technique

The transmission line is located in the wilderness and is vulnerable to lightning strikes. The direct lightning overvoltage caused by lightning strikes on the line and the induced lightning overvoltage caused by the lightning strike on the ground near the line are the so-called atmospheric overvoltages that often occur on transmission lines. The accidents caused by insulator flashover, line tripping and lightning wave intrusion into substation and damage to substation equipment account for a large percentage of power grid accidents. In order to prevent these accidents caused by atmospheric overvoltage, lightning wires (overhead ground wires), lightning rods, and different forms of lightning arresters have been installed on power lines and substations. As one of the effective lightning protection devices, the arcing angle is installed at the end of the insulator string with a certain gap. The insulation breakdown voltage of the arcing angle is lower than that of the insulator string, so when the transmission wire is subjected to lightning When shielding strikes, the insulator strings can be broken down preferentially, and the lightning current can be quickly discharged into the ground, thereby protecting the insulator strings from burning damage caused by power frequency freewheeling arc after the lightning breakdown gap.

Contents of the invention

The purpose of this utility model is to overcome the deficiencies of the existing technology, and provide a suitable installation insulator string that can not rely on the original insulator string connection, and at the same time play the role of lightning protection, increase the arc angle of the lightning protection gap, and ensure the stability and safety of the line The arcing angle of the lightning protection gap of the operating duplex insulator string.

The purpose of this utility model is accomplished through the following technical solutions. This double-connected insulator string lightning protection gap arc angle is composed of two cross-arm end arc angles, two right-angle hanging plates, two wire end arc angles and two cross hanging plates; the cross-arm end The arcing angle and the arcing angle of the wire end are made of round steel; the arcing angles of the two cross-arm ends are symmetrically distributed, the arcing angles of the two wire ends are symmetrically distributed, and the arcing angles of the two cross-arm ends are symmetrically distributed. The cross-section made of arc angles is W-shaped with a straight line in the middle, and two right-angle hanging plates are connected to the straight line; the cross-section made of two wire ends with arc angles is V-shaped with a straight line in the middle. Two cross hanging boards are respectively connected to the straight line section, and the arc angle at the end of the wire is provided with a ball at the end; the arc angle at the two cross-arm ends is symmetrically distributed, and the arc angle at the two end of the wire is symmetrically distributed. It is distributed symmetrically; one end of the arcing angle at the cross-arm end is connected to the right-angle hanging plate and connected in series to the insulator string; the other end of the arcing angle at the wire end is connected to the cross hanging plate and connected in series to the insulator string.

As a preference, the connection between the arc angle at the cross-arm end and the right-angle hanging plate, and the connection between the arc angle at the wire end and the cross hanging plate are all double-hole connections, and the positions of the double holes are all set at the cross-arm end. Arc angle, the end of the wire end that draws the arc angle.

The beneficial effects of the utility model are as follows: one is to increase the hanging plate, so that it does not depend on the connection hole connected with the fittings in the insulator string, so that the installation of the arc angle does not need to change the shape of other fittings on the insulator string, so that the arc angle The installation and replacement are simpler and faster; the second is that the arcing angle adopts double-hole connection, which avoids the gap change caused by the rotation of the arcing angle in the line, and makes the operation more stable.

Description of drawings

Fig. 1 is a schematic diagram of the arc angle structure of the double insulator string lightning protection gap of the present invention.

Fig. 2 is a schematic diagram of the structure of the arc angle at the end of the cross arm of the present invention.

Fig. 3 is a schematic diagram of the front structure of the right-angle hanging board of the present invention.

Fig. 4 is a schematic diagram of the side view structure of the right-angle hanging plate of the present invention.

Fig. 5 is a schematic diagram of the structure of the arc angle at the wire end of the present invention.

Fig. 6 is a schematic diagram of the front structure of the cross hanging board of the present invention.

FIG. 7 is a schematic diagram of the structure of A-A in FIG. 6 .

The labels in the attached drawings are respectively: 1. arc angle at the cross-arm end; 2. right-angle hanging plate; 3. arc angle at the wire end; 4. cross hanging plate; 5. ball; 6. double holes.

Detailed ways

The utility model will be introduced in detail below in conjunction with the accompanying drawings: as shown in accompanying drawings 1 to 7, the utility model belongs to insulator protection fittings on overhead transmission lines, and the arc angle of the double insulator string lightning protection gap is determined by two horizontal The arm end arc angle 1, two right-angle hanging boards 2, two wire end arc angles 3, and two cross hanging boards 4; the cross-arm end arc angle 1 and wire end arc angle 3 are used Made of Φ16 round steel; the arc angle 1 at the two cross-arm ends is symmetrically distributed, the arc angle 3 at the two wire ends is symmetrically distributed, and the cross-section formed by the arc angle 1 at the two cross-arm ends It is W-shaped with a straight line in the middle, and two right-angle hanging boards 2 are connected to the straight line; the cross-section formed by the arc angle 3 at the two wire ends is V-shaped with a straight line in the middle, and the straight line in the middle is respectively Two cross hanging boards 4 are connected, and the arc angle 3 at the end of the wire is provided with a ball 5 at the end; the arc angle 1 at the two cross-arm ends is symmetrically distributed, and the arc angle 1 at the two end wires is symmetrically distributed. 3 are symmetrically distributed; one end of the arcing angle 1 at the cross-arm end is connected in series with the right-angle hanging plate 2 and connected in series to the insulator string; the other end of the arcing angle 3 at the wire end is connected in series with the cross hanging plate 4 in the insulator string.

The arcing angle 1 at the cross-arm end is connected in series with the right-angle hanging plate 2 into the insulator string, and there is no need to add connecting holes for the arcing angle to the connecting fittings at the cross-arm end of the insulator string.

The arc strike angle 3 at the wire end is connected in series with the cross hanging plate 4 and connected in series to the insulator string, so there is no need to add connection holes for the arc strike angle to the connecting fittings at the wire end of the insulator string.

The connection between the arc angle 1 at the cross-arm end and the right-angle hanging plate 2, the arc angle 3 at the wire end and the cross hanging plate 4 are all double-hole connections, and the positions of the double holes 6 are all located on the cross-arm The ends of the arc angle 1 at the end and the arc angle 3 at the wire end can limit the swing and rotation of the arc angle.

The utility model is not limited to the above-mentioned embodiments, regardless of any changes in its shape or material composition, any structural design provided by the utility model is a deformation of the utility model, and should be considered as a modification of the utility model. within the scope of protection.

Claims (2)

1. A double insulator string lightning protection gap arcing angle is characterized in that: two cross-arm end arcing angles (1), two right-angle hanging plates (2), and two wire end arcing angles (3 ), two cross hanging boards (4); the arc angle (1) at the end of the cross-arm and the arc angle (3) at the end of the wire are made of round steel; the arc angle at the end of the two cross-arms (1) It is symmetrically distributed, and the arc angles (3) at the two wire ends are symmetrically distributed, and the cross-section formed by the arc angles (1) at the two cross-arm ends is W-shaped with a straight line in the middle, and the straight line There are two right-angle hanging boards (2) connected to the upper part; the cross-section formed by the arc angles (3) at the ends of the two wires is V-shaped with a straight line in the middle, and two cross hanging boards are respectively connected to the middle straight line. (4), the arc angle (3) at the end of the wire is provided with a ball (5); one end of the arc angle (1) at the cross-arm end is connected in series with the right-angle hanging plate (2) and connected in series to the insulator string; the wire The other end of the end striking arc angle (3) is connected with the cross hanging plate (4) and connected in series in the insulator string. 2. The double insulator string lightning protection gap arc striking angle according to claim 1, characterized in that: the connection of the arc striking angle (1) at the cross-arm end and the right-angle hanging plate (2), the arc striking at the wire end The connection between the angle (3) and the cross hanging plate (4) is a double-hole connection, and the positions of the double holes (6) are all set at the arc angle (1) at the cross-arm end and the arc angle (3) at the wire end. the end of.