A control valve flexible connection kit

Abstract

The invention discloses a control valve flexible connection kit which comprises a left lug ring and a right lug ring. A groove matched with the top end of a valve rod is formed between the left lug ring and the right lug ring, and the left lug ring and the right lug ring are connected to the two ends of a large round pin in series respectively. The middle of the large round pin is provided with a small hole perpendicularly crossed with the axis of the large round pin and penetrating through the large round pin, and a small round pin connecting the large round pin and an upper seat arc shaft frame penetrates through the small hole. The upper seat arc shaft frame is sleeved with an antiskid force-evening spring capable of exerting pre-tightening force on the upper seat arc shaft frame, and the large round pin and the small round pin are surrounded by the antiskid force-evening spring. The upper end of the antiskid force-evening spring abuts against an upper seat, the lower end of the antiskid force-evening spring abuts against the left lug ring and the right lug ring, and the upper seat is provided with a head thread matched with a piston rod.

Description

technical field [0001] The invention relates to a kit for flexibly connecting an actuator and an adjustment mechanism of a control valve, which belongs to the technical field of control valves. Background technique [0002] In industrial production control systems, a control valve is a terminal element formed by a power-operated device, consisting of a valve part with an internal regulating mechanism that changes the flow rate of a fluid. The valve component is connected to the actuator and responds to the signal from the control element. For straight-stroke control valves, in the actual installation process, it is difficult to make the output shaft of the actuator completely coaxial with the input shaft of the adjustment mechanism, so the force of the actuator acting on the adjustment mechanism will be unbalanced. If the traditional rigid connection is adopted between the actuator and the regulating mechanism, it is easy to cause the valve stem of the regulating mechanism ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, to provide a set that flexibly connects the output shaft of the control valve actuator and the input shaft of the adjustment mechanism, and solve the problem of the coaxiality between the output shaft of the actuator and the input shaft of the adjustment mechanism. Guarantee problems, reduce the processing difficulty of the connecting surface between the actuator and the regulating mechanism of the control valve, eliminate the stuck phenomenon of the valve stem of the control valve, and improve the control accuracy and service life of the control valve

Images