150 ton linear winch type KTI 150
KTI 150 linear winch 150 mTon capacity
The KTI 150 is specially designed to work in Atex/Zone II areas on the Norwegian shelf. This winch complies to Norsok Z-015, is suitable to work in a hazardous area zone 2 IIA T3 and designed according to DNV lifting appliances.
It smaller size and low weight makes it easy to install on offshore platforms, where it can be lifted straight from the supply vessel, also the electrical HPU complies with the above rules and regulations.
This winch is also suitable to work in temperatures below zero.
General description linear winch
The linear winch consists of two grippers mounted in a frame. The wire rope passes through each gripper. Each gripper is capable of holding the wire rope. One of the grippers moves back and forth (extend and retract) through the action of two hydraulic main cylinders, the other gripper is stationary in the winch frame.
The holding action is developed by two wedges inside each gripper. If the wedges are contacting the wire rope when a load is applied to the wire rope, the wedges will clamp onto and hold the wire rope. When the movable gripper is pulling, the wire rope slips through the wedges of the other gripper.
Four hydraulic wedge cylinders control wedge movement. Extending the wedge cylinders closes the wedges. Retracting the wedge cylinders opens the wedges. Each pair of wedge cylinders is hydraulically connected in parallel to assure equal actuating forces.
Wire rope pull-in is accomplished manually or automatically by the control system. In both the manual and automatic mode, the #1 and #2 gripper wedges maintain in contact with the wire rope at all times.
Wire rope payout can also be accomplished manually or automatically. Since the wedges holding the load cannot be opened, control of the load is always maintained.
The design of an intermittent linear winch allows it to build a compact machine which is suitable to work on either offshore platforms with limited or in areas with limited space and/or crane capacity, this type is less suitable for long beach pulls.