Bevel gear hydraulic device

The invention discloses a í‹bevel gear hydraulic deviceíŒ, an auxiliary driving for hydraulic bellows gate valve and hydraulic double membrane ring stop valve, having three powersí¬hand power, electric power and pneumatic power, all able to be mounted according to actual needs to realize multiple rotation of the two valves, and it makes a big bevel gear and two small bevel bears alternate with oil cylinder and piston to work so as to transfer valve stem thrust and bear piston cylinder pull. Besides, it controls main and auxiliary nuts of valve stem by splined sleeve to compose a clutch. And it has independency of manpower, electric power and gas power and combinability of hand power with electric power and pneumatic power. And it is an ideal auxiliary device with compact bulk, high mechanical operating efficiency, use reliability and long service life.