Wind deflection prevention jumper cross arm of 1000kV tension tower

Abstract

The invention relates to a jumper cross arm of an ultra-high voltage tension tower of a power transmission line, in particular to a wind deflection prevention jumper cross arm of a 1000kV tension tower. The wind deflection prevention jumper cross arm is particularly suitable for a power transmission line tower in a strong wind area on the ultra-high voltage power transmission line. An original hanging angle steel is arranged into double angle steels AC and DF, two vertical cross web members BL, BJ, EO and EM are respectively arranged at the middle point to form inner and outer two reinforced trusses DFOM and ACLJ; the middle points of an upper chord member and a lower chord member are each provided with a horizontal supporting rod, upper and lower supporting rods are provided with two vertical cross web members NH and QE to form a QNEH cross truss, and the inner and outer trusses, a connecting rod member and the cross truss form a space truss which is used for resisting wind bias load.The additional torque is shared through the in-plane performance of the inner and outer trusses supported by the space truss, so that the bearing capacity damage and the instability of the hanging angle steel caused by wind deflection torque are effectively avoided, and therefore a technical realization foundation is provided for the application of the wind deflection prevention device in the ultra-high voltage 1000kV tension tower.

Description

technical field

[0001] The invention relates to a jumper crossarm for a tension tower of an extra-high voltage transmission line, in particular to a jumper crossarm for a 1000kV tension tower against wind deflection, which is especially suitable for a transmission line tower in a strong wind area on an extra-high voltage transmission line. Background technique

[0002] In transmission lines, many transmission poles and towers are installed in areas with strong winds and strong winds. At this time, in order to avoid the insulator jumper string being affected by the wind and causing deviation, and further causing flashover trips and other problems, windproof yaw hanging is widely used in 220kV transmission lines. A point device is used to solve this problem, so as to effectively reduce the windage range of jumpers or wires, and avoid flashover tripping; The way of weight makes the jumper string of insulators stable enough under the set wind level without wind deflection exceed...

Examples

Embodiment Construction

[0017] Best practice:

[0018] Refer to attached Figure 1-Figure 6 , 1000kV tension tower wind deflection jumper cross arm, including front upper horizontal angle steel JP, rear upper horizontal angle steel LR, front lower horizontal angle steel AG and rear lower horizontal angle steel CI, between front upper and lower horizontal angle steels and rear upper, There are several supporting slanting rods evenly distributed between the lower horizontal angle steels. The four horizontal angle steels have ACLJ as the outer end, and the direction in which the other end is connected to the tower body is the inner side. An outer truss ACLJ is installed at the outer ends of the four transverse angle steels, and an inner truss FDMO is also included, which is located on the side of the outer truss ACLJ close to the main pole and connected with the outer ends of the four transverse angle steels. The trusses are arranged side by side in parallel and are equipped with vertical V-shaped webs...

technical field

[0001] The invention relates to a jumper crossarm for a tension tower of an extra-high voltage transmission line, in particular to a jumper crossarm for a 1000kV tension tower against wind deflection, which is especially suitable for a transmission line tower in a strong wind area on an extra-high voltage transmission line. Background technique

[0002] In transmission lines, many transmission poles and towers are installed in areas with strong winds and strong winds. At this time, in order to avoid the insulator jumper string being affected by the wind and causing deviation, and further causing flashover trips and other problems, windproof yaw hanging is widely used in 220kV transmission lines. A point device is used to solve this problem, so as to effectively reduce the windage range of jumpers or wires, and avoid flashover tripping; The way of weight makes the jumper string of insulators stable enough under the set wind level without wind deflection exceed...

Examples

Embodiment Construction

[0017] Best practice:

[0018] Refer to attached Figure 1-Figure 6 , 1000kV tension tower wind deflection jumper cross arm, including front upper horizontal angle steel JP, rear upper horizontal angle steel LR, front lower horizontal angle steel AG and rear lower horizontal angle steel CI, between front upper and lower horizontal angle steels and rear upper, There are several supporting slanting rods evenly distributed between the lower horizontal angle steels. The four horizontal angle steels have ACLJ as the outer end, and the direction in which the other end is connected to the tower body is the inner side. An outer truss ACLJ is installed at the outer ends of the four transverse angle steels, and an inner truss FDMO is also included, which is located on the side of the outer truss ACLJ close to the main pole and connected with the outer ends of the four transverse angle steels. The trusses are arranged side by side in parallel and are equipped with vertical V-shaped webs...

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