Jiangsu Shemar Electric Co., Ltd.

Jiangsu Shenma Electric Co., Ltd.

Shanghai Shemar Power Engineering Co., Ltd

Dequan Li

Jie Yu

Bin Ma

Jiang Fang

Bing Wang

Qing Huang

Ronghua Wang

Qingzhan Wang

Yong Qiu

A composite crossarm fixed on a pole body of a transmission pole is disclosed. The composite crossarm includes: a core rod, an insulating layer and a load-bearing member. The insulating layer and the load-bearing member cover and are fixed to an outer peripheral surface of the core rod. The load-bearing member is positioned in a middle region of the core rod connected to the pole body, and the insulating layer is positioned in regions of the core rod other than the middle region. A transmission pole using the above composite crossarm is also disclosed. In the above manner, the load-bearing member is arranged at a position where the core rod is connected to the pole body in advance. On one hand, the core rod is able to be connected to the pole body without providing with a hole. On the other hand, the load caused by the fixed connection is applied on the load-bearing member directly, with no damage to the insulating layer. Both the load-bearing member and the insulating layer cover and are fixed on the outer peripheral surface of the core rod, so that the core rod is protected from external corrosion, to ensure the mechanical properties of the composite crossarm.

Composite crossarm and transmission pole

An overhead power distribution line () comprises a tension resistant pole (), two composite crossbeams () and tension resistant fixing members (). A middle portion of the composite crossbeam () is horizontally secured on the tension resistant pole (), and end portions of the composite crossbeam () are connected to the tension resistant fixing members (). The tension resistant fixing members () enable the two composite crossbeams () to integrally connect and are for fixing conducting lines. With the above configuration, two composite crossbeams () are secured on the same horizontal plane of the tension resistant pole (), thus satisfying vertical tension of a tension resistant requirement. Further, by using composited crossbeam bodies (), a dry arc distance is significantly increased, and electrical lightning resistance performance is enhanced, preventing incidents such as line disconnection and flashover caused by lightning strike. The composite crossbeams () are maintenance-free and do not require periodical inspection and maintenance, significantly reducing labor costs. The use of crossbeams () can further eliminate the use of tension insulators and simplify the structure of lines.

Overhead power distribution line

Provided is a cross arm with one end connected to a tower body and a free end for connecting a conducting wire. Free end comprises an end connecting piece and an extension piece. Extension piece is fixed with end connecting piece. Extension piece protrudes horizontally from end connecting piece. Conducting wire is connected to extension piece. An angle between extension piece and a cross arm center line is greater than that between conducting wire and cross arm center line. Cross arm free end includes a jumper wire device horizontally arranged on end connecting piece for hitching jumper wire. Extension piece use increases distance between conducting wire and tower body when turning angle condition is met. Gap requirement between conducting wire and tower body is met, and cross arm length increase is eliminated. Horizontally arranging jumper wire device on end connecting piece reduces distance between wire layers and tower body size.

Cross arm and angle tower and tension tower comprising the same

Crossarm

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Nantong, China

Dequan Li