CN210053173U - A kind of secondary protection device for tensile and drainage string of transmission line - Google Patents

Abstract

The utility model discloses a secondary protection device for the tensile and drainage string of transmission lines, which relates to the technical field of operation and maintenance of transmission lines. There is an intermediate connecting ring in the connecting piece, a fixing plate is fixed on the lower part of the intermediate connecting ring, and a long hole A is opened on the fixing plate. The insulator fixing hoop is connected with the fixing plate through the long hole B and the long hole A through the bolt B. The insulator fixing hoops are porcelain insulator fixing hoops or composite insulator fixing hoops. The beneficial effects of the utility model are as follows: the utility model further strengthens the connection between the insulator string and the iron tower, and can be installed without the power outage of the line, thereby reducing the number of power outages; In the process of maintenance and emergency repair, it can effectively prevent the transmission line tension and drainage jumper string falling off, fault tripping and other accidents.

Description

A kind of secondary protection device for tensile and drainage string of transmission line

technical field

The utility model relates to the technical field of operation and maintenance of transmission lines, in particular to a secondary protection device for a tension-resistant current-draining string of a transmission line.

Background technique

Transmission lines have been exposed to the wild for a long time, and components such as conductors, ground wires, insulators, and connecting hardware have been subjected to the action of wind for a long time. It is more prone to the phenomenon of swinging. The jumper insulator and the cross arm are connected by bolts. During operation, the vibration generated by the insulator being beaten by the wind is transmitted to the connecting bolts, resulting in the loosening and falling off of the tower bolts and nuts. Eventually, the insulator of the drain jumper will fall off, resulting in a line failure. At present, the main method to prevent the insulators of the tension tower drainage jumper from falling out of the string is to perform regular inspections by personnel and tighten the bolts, which increases the workload and safety risks. The invention of the secondary protection device for the tension-resistance drainage string of the transmission line can solve the risk of the insulator of the drainage jumper falling off and the string at one time, and improve the reliability of the power supply of the line.

Utility model content

Aiming at the problems existing in the above-mentioned prior art, the present utility model provides a secondary protection device for tensile and current drainage strings of power transmission lines. A screw hole is opened, and there is a fixing bolt A (8) in it, and a half-circle connecting piece (2) is fixed on the other surface. The lower part of (3) is fixed with a fixing piece (4), a long hole A (5) is opened on the fixing piece (4), the insulator fixing hoop (6) is a symmetrical Ω shape, and both ends of the insulator fixing hoop (6) are open. There is a long hole B (7), and two insulator fixing hoops (6) are connected with the fixing plate (4) through the long hole B (7) and the long hole A (5) through the bolt B (10). The insulator fixing hoops (6) are porcelain insulator fixing hoops or composite insulator fixing hoops, wherein both ends of the porcelain insulator fixing hoops have short joint planes, and both ends of the composite insulator fixing hoops have long joint planes. The cross section of the insulator fixing hoop (6) has a convex point (11) at the lower end.

The use method of the utility model: the secondary protection device for the tensile current drainage string of the transmission line is composed of three parts: the cross arm connection part of the jumper current drainage string, the intermediate connection part with adjustable length and width, and the insulator fixing hoop, wherein the insulator fixing hoop is composed of three parts. It is a fixing ferrule for porcelain insulators or a fixing ferrule for composite insulators. When in use, clip the upper ends of the two cross-arm connecting parts into the jumper cross-arm tower material, and tighten the upper bolts. The lower end of the cross-arm connecting part is fixed with a half-circle connecting piece, and the half-circle connecting piece is pierced with an intermediate connecting ring, which is connected in the middle. The lower part of the ring is fixed with a fixing piece, the fixing piece has a long hole A, the insulator fixing hoop is a symmetrical Ω shape, and the two ends of the insulator fixing hoop are opened with a long hole B, and the two insulator fixing hoop pass through the long hole B through the bolt B. And the long hole A is connected with the fixing piece. Through live work installation, it can effectively prevent the occurrence of string-drop accidents of tension tower drainage jumpers. The middle connecting part is suitable for porcelain insulators and composite insulators of different lengths. The lower part of the connecting part has long holes for the up and down movement of the bolts, which can be adjusted according to the length between the connecting part of the cross arm and the insulator fixing device. The insulator fixing hoop is used to fix the jumper insulator. The diameter of the middle ring is smaller than the diameter of the steel bowl of the insulator. The insulator can be fixed by tightening the bolts at both ends. Secure the insulator securely.

The beneficial effects of the utility model are: the connection between the insulator string and the iron tower is further strengthened by the utility model, the installation can be carried out under the condition that the line is not powered off, and the number of line power outages is reduced; the structure of the device is simple and portable; the device is suitable for It is suitable for all types of 35-110kV line towers; the device is short in length and does not affect the line insulation. In the process of transmission line operation, maintenance, and emergency repair, it can effectively prevent the transmission line tension and drainage jumper.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the left side view of Fig. 1;

FIG. 3 is a cross-sectional view of the fixing hoop A-A of the porcelain insulator in FIG. 1;

Fig. 4 is the sectional view A-A of the composite insulator fixing hoop of Fig. 1;

Fig. 5 is the B-B sectional view of Fig. 3, Fig. 4;

In the figure: 1. Cross arm connecting piece; 2. Half-circle connecting piece; 3. Intermediate connecting ring; 4. Fixing piece; 5. Long hole A; 6. Insulator fixing hoop; 7. Long hole B; 8. Fix Bolts; 9. Jumper cross arm tower material; 10. Bolts; 11. Bumps.

Detailed ways

Embodiment 1, as shown in Fig. 1-Fig. 5, the present utility model provides a secondary protection device for tensile and drainage strings of power transmission lines, the structure of which is as follows: the cross arm connecting member (1) is a U-shaped plate, and the U-shaped plate A screw hole is opened on one surface of the device, and there are fixing bolts A (8) in it, and the other surface is fixed with a semi-circular connecting piece (2), and the semi-circular connecting piece (2) is pierced with an intermediate connecting ring (3). , the lower part of the intermediate connecting ring (3) is fixed with a fixing piece (4), a long hole A (5) is opened on the fixing piece (4), the insulator fixing hoop (6) is symmetrical Ω-shaped, and the insulator fixing hoop (6) There are long holes B (7) at both ends of the insulator, and the two insulator fixing hoops (6) are connected with the fixing plate (4) through the long hole B (7) and the long hole A (5) through the bolt B (10). The insulator fixing hoop (6) is a porcelain insulator fixing hoop, wherein the two ends of the porcelain insulator fixing hoop have short joint planes. The cross section of the insulator fixing hoop (6) has a convex point (11) at the lower end.

Embodiment 2, as shown in FIGS. 1 to 5 , the present utility model provides a secondary protection device for tensile and drainage strings of power transmission lines, the structure of which is as follows: the cross arm connector (1) is a U-shaped plate, A screw hole is opened on one surface of the device, and there are fixing bolts A (8) in it, and the other surface is fixed with a semi-circular connecting piece (2), and the semi-circular connecting piece (2) is pierced with an intermediate connecting ring (3). , the lower part of the intermediate connecting ring (3) is fixed with a fixing piece (4), a long hole A (5) is opened on the fixing piece (4), the insulator fixing hoop (6) is symmetrical Ω-shaped, and the insulator fixing hoop (6) There are long holes B (7) at both ends of the insulator, and the two insulator fixing hoops (6) are connected with the fixing plate (4) through the long hole B (7) and the long hole A (5) through the bolt B (10). The insulator fixing ferrule (6) is a composite insulator fixing ferrule, wherein the two ends of the composite insulator fixing ferrule have long joint planes. The cross section of the insulator fixing hoop (6) has a convex point (11) at the lower end.

Claims (3)

1. A secondary protection device for tensile and drainage strings of power transmission lines, characterized in that: the cross arm connecting piece (1) is a U-shaped plate, and one surface of the U-shaped plate is provided with screw holes, and there are fixing bolts (8 ), a half-circle connecting piece (2) is fixed on the other surface, an intermediate connecting ring (3) is pierced in the semi-circular connecting piece (2), and a fixing piece (4) is fixed on the lower part of the intermediate connecting ring (3). , a long hole A (5) is opened on the fixing sheet (4), the insulator fixing hoop (6) is symmetrical Ω-shaped, and the two ends of the insulator fixing hoop (6) are provided with a long hole B (7), the two insulators are fixed The hoop (6) is connected with the fixing plate (4) through the long hole B (7) and the long hole A (5) through the bolt (10). 2 . The secondary protection device for tensile and drainage strings of transmission lines according to claim 1 , wherein the insulator fixing hoop ( 6 ) is a porcelain insulator fixing hoop or a composite insulator fixing hoop, wherein the porcelain insulator fixing hoop The joint planes at both ends of the fixing hoop are short, and the joint planes at both ends of the fixing hoop of the composite insulator are long. 3 . The secondary protection device for tensile and current drainage strings of power transmission lines according to claim 1 , wherein the cross section of the insulator fixing hoop ( 6 ) has a convex point ( 11 ) at the lower end. 4 .

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