Novel ocean drilling platform sliding sleeve formula marine riser filling valve

The utility model relates to a novel ocean drilling platform sliding sleeve formula marine riser filling valve, including the marine riser main part, the marine riser hatch door, driving oil cylinder, the balanced valve, the main control valve, the locking -valve, change -over valve and accumulator, main control valve wherein, the locking -valve, change -over valve and accumulator all are located marine riser main part surface, the cladding of marine riser hatch door is at marine riser main part lower part and sliding connection, driving oil cylinder is connected with marine riser main part and marine riser hatch door respectively, the balanced valve inlays in addition in the marine riser main part, the main control valve in addition through oil pipe respectively with the balanced valve, locking -valve and change -over valve intercommunication, the change -over valve in addition respectively with the locking -valve, accumulator and driving oil cylinder intercommunication, the balanced valve communicates with the locking -valve in addition. This novel one side has improved equipment reliability of operation and stability, and on the other hand solves effectively in the conventional control system that to cross the corresponding speed of filling valve control that leads to slow because of the balanced valve pressure differential, carries out the drawback that the precision is low to very big improvement marine riser filling valve control system's control accuracy.