Valve core rotating device of control ball valve

Abstract

The invention discloses a valve core rotating device of a control ball valve, which belongs to the technical field of flow control valve fittings. The valve core rotating device of the control ball valve is characterized in that the valve core rotating device comprises a valve core and a valve core lower bearing capable of supporting the valve core to rotate; an inner hole is formed in the bottom of the valve core; the bottom surface of the valve core is connected with a valve core base plate; a center bearing hole provided with a composite surface structure is formed in the center of the valve core base plate; and the upper part of the valve core lower bearing penetrates through the center bearing hole and is matched with the inner hole and supports the valve core to rotate. According to the scheme, components are simple, machining forming can be realized without complicated processes, start and stop of the valve can be supported through penetrating and rotation, the assembly is rapid and convenient, and the manufacturing cost and the manual assembly cost are lowered substantially. Since the valve core lower bearing is skillfully matched with composite surfaces of the valve core base plate, the start and stop effects can be achieved under the action of very small torque, the power consumption is lowered substantially, and the energy saving and sealing effects are excellent.

Description

technical field [0001] The invention belongs to the technical field of flow control valve accessories, and in particular relates to a valve core rotating device of a control ball valve. Background technique [0002] At present, the rotation of the spool of the ball valve is controlled by setting a swinging piece on the top of the spool, and the opening and closing of the spool is driven by the rotation of the screw on the swinging piece. Therefore, during the rotation of the spool, the bottom of the spool must be supported together. its rotating device. The existing device is as follows: the spool is connected to the lower shaft of the spool through bolts, the lower part of the lower shaft of the spool is connected to the inner ring of the joint bearing, and the outer ring of the joint bearing is fixed on the bearing seat. In order to facilitate the rotation of the joint bearing on the bearing seat, A spring retaining ring is arranged at the joint between the joint bearing ...

AI Technical Summary

Problems solved by technology

The above-mentioned structural components are many, involving many processing procedures, and the assembly process will be more complicated, and the production cost is high; the required pre-tightening force is often not achieved during use, and the sealing effect between the valve seat and the valve core is not good. Good, often lead to leakage, and high torque loss power consumption

Images