METHOD OF AFLOAT ERECTION OF SHIP'S HULL AND DEVICE FOR REALIZATION OF THIS METHOD Russian patent published in 2007 - IPC B63B9/06 

FIELD: shipbuilding; coupling of ship's members when afloat.

SUBSTANCE: proposed method is performed with the aid of centering and drawing units; proposed method includes building and launching separate members of ship made in form of displacement-type pontoons provided with transverse bulkheads; pontoons are towed to erection area where they are coupled and welded together. Prior to launching each pontoon, its erection joint is contoured to position at which edges of all framing members to be coupled lie in one vertical plane. One pontoon is provided with centering and drawing units for meeting of edges. Mounted over contour of erection joint (but for joint in area of deck) is compensator made in form of thick bar whose thickness exceeds thickness of main plates of ship's hull. After launching the pontoons and towing them to erection area, they are subjected to stage-by-stage drawing together and centering with the aid of drawing and centering units; first, edges of joint of members shall accurately meet in area of transverse bulkhead and then they shall meet with deck of hull. Meeting of other edges is ensured at further coupling by means of compensator; then, coupling and welding shall be carried out. Device proposed for realization of this method includes centering and drawing units mounted on one of pontoons, compensator for compensation for difference in length and height of pontoons which is made in form of thick metal bar whose thickness exceeds thickness of plates of ship's hull joints. Compensator is mounted on one of pontoons over contour of erection joint, but for the joint in area of deck. Centering units are made in form of guides and locking catchers. Guide catchers are mounted in fore and aft extremities of pontoon at level of deck and locking catchers are mounted on deck of last erection joint and on transverse bulkhead located in its mid-section for accurate meeting of joint edges in area of transverse bulkhead of pontoon mid-section and deck of hull. Guide catchers are engageable with bolsters mounted on hull of second pontoon.

EFFECT: enhanced reliability of erection of hull when afloat at coupling along CL; reduced labor input.

3 cl, 4 dwg