Manual and automatic control axial flow distribution reversing rotary valve

Abstract

The invention discloses a reversing rotary valve which manually and automatically controls coaxial flow distribution and comprises an automatic control device fixedly arranged on an upper valve body,connecting a cylinder cover, a cylinder barrel and the upper valve body into a self control body by the bolts of a pull rod and arranged in the self control body; the automatic control device comprisesthe cylinder cover, the cylinder barrel, a piston rod provide with a piston, a rotating shaft, a flow distribution valve core, the upper valve body and a lower valve body; one end of the piston rodis fixedly arranged on the piston, and the other end is provided with a rack which is meshed with a gear connected on the rotating shaft; the piston and the cylinder barrel are matched in a sliding way; the rotating shaft is connected with the flow distribution valve core by a transmission pin; the flow distribution valve core and a valve holder provided with a waveform spring to form plane seal and carry out coaxial flow distribution. The reversing rotary valve has good seal performance and non leakage; the wear clearance of the valve holder after working for a long time can be automaticallyadj usted and complemented; an automatic control device is additionally arranged to realize automatization, thus lightening the working intensity and improving the working efficiency; meanwhile, the steering rotary valve also has the manual control function, can be manually operated, controlled and interfered for emergency during power off, failure and debugging; the control functions thereof are complete; moreover, the valve is convenient and reliable for use.

Description

technical field [0001] The invention relates to a reversing rotary valve, especially one used in the hydraulic control system of petroleum blowout preventer to change the direction of fluid delivery, and adopts axial flow distribution and automatic control, and can be used in the event of power failure or failure. Manual and automatic control axial distribution reversing rotary valve for manual emergency operation. Background technique [0002] Rotary valve is a control element that changes the direction of fluid movement by rotating the spool. At present, most domestic and foreign rotary valves use radial flow distribution, but the control method is single and can only be operated manually. The force effect is not easy to balance, so manual operation is particularly laborious and labor-intensive. In addition, the valve core is under the action of radial unbalanced force, which increases the wear between the valve core and the valve body, and the wear cannot be compensated, ...

AI Technical Summary

Problems solved by technology

[0002] Rotary valve is a control element that changes the direction of fluid movement by rotating the spool. At present, most domestic and foreign rotary valves use radial flow distribution, but the control method is single and can only be operated manually. The force effect is not easy to balance, so manual operation is particularly laborious and labor-intensive. In addition, the valve core is under the action of radial unbalanced force, which increases the wear between the valve core and the valve body, and the wear cannot be compensated, so the sealing performance is poor. Leakage accidents have multiplied, which has greatly affected the normal production and operation of users

Images