Design and construction for a lift cable latching system in order to (dis)connect the lifting cable from a trencher while subsea and on deck.
Major challenge was the engineering and design within a critical envelope due to the existing lifting configuration (Swingbeam / A-frame) of the system.
The main requirements for the system are the following:
The system exists of an outer frame which can be mounted to the trenchers’ existing mainframe. In this outer frame a latching bucket is positioned (to compensate for the different CoGs).
The latching bucket exists of 4 spring loaded latches and a catcher for the docking pin. The docking pin can be mounted to the existing interface of the Swingbeam / A-frame.
The 4 spring loaded latches can be opened manually to disconnect the docking pin by using 4 small hydraulic cylinders and are only able to open the latches without the suspended load of the trencher.