Porous combination formula alloy plastic cable crane span structure that can freely go between

The utility model discloses a porous combination formula alloy plastic cable crane span structure that can freely go between, including crane span structure and the connecting piece of joint at the crane span structure both ends, the crane span structure includes the crane span structure body and the lower crane span structure body, go up the crane span structure body with be provided with the orifice plate down between the crane span structure body, the draw -in groove has been offered about the orifice plate on the surface, go up the crane span structure body with down the crane span structure body with the junction of orifice plate is provided with the cardboard. Beneficial effect lies in: this porous combination formula alloy plastic cable crane span structure that can freely go between adopts go up the crane span structure body with down the crane span structure body with the form of orifice plate combination installation, through set up at least one on the orifice plate the pin hole for the lead wire of