220KV double-line mounting ladder head

A 220KV double-line mounting ladder head comprises a support assembly and a mounting assembly, the support assembly comprises a transverse rod and two vertical rods, and an upper supporting rod and a lower supporting rod of each vertical rod are hinged through a hinge shaft; a sliding rod is connected between the two lower supporting rods, and compression springs are arranged below sleeves at the two ends of the sliding rod. A bent pipe is fixed between the lower supporting rods, and a hanging ring is arranged in the middle of the bent pipe; hanging assemblies are fixed to the same positions of the right sides of the two pairs of upper supporting rods. The distance between the lower end of the opening in the mounting assembly and the hinge shaft is larger than 1/2 of the distance between the two power transmission wires. A base in the self-locking assembly is fixed to the upper supporting rod, the rear end of a self-locking rod is hinged to the base through a pin shaft and a torsional spring, and the front en