Tumbling pulley used for crossing horizontally-arranged double-bundled conductor spacer

The invention discloses a tumbling pulley used for crossing a horizontally-arranged double-bundled conductor spacer. The tumbling pulley is characterized in that two sides of a penetrating pin (1) are respectively and successively provided with a bearing (3) and an upper supporting plate (2); two ends of the penetrating pin (1) are fastened and plugged by fixing bolts (5); the center of the penetrating pin (1) is provided with a semicircular hanging ring (4) tied to an insulating rope ruler (10); the insulating rope ruler (10) penetrates through the upper end of one upper supporting plate (2); the outer part of each bearing (3) is sleeved by a routing pulley (6); the distance L1 between the inner sides of the two routing pulleys (6) is 320mm, and the distance L2 between the outer sides is 480mm; the lower end of each upper supporting plate (2) is connected with a lower supporting plate (7) through a connecting lead screw (8); the lower supporting plates (7) can rotate 360 degrees; and the lower supporting plate (7) are internally connected with transmission pulleys (9). According to the invention, the tumbling pulley used for crossing the horizontally-arranged double-bundled conductor spacer is simple in structure, safe and reliable, flexible in adjustment, stable in installation, wide in application range, high in live-line operation efficiency and capable of ensuring the safety of live-line operation.