The Davit crane is specialized lifting equipment used on ships. It is primarily designed to lift and recover lifeboats, workboats, and other small boats.
Structure Composition
Structural composition of davit crane
Driving Device
Generally, an electric motor is the power source, providing the energy needed to move the davit through a transmission mechanism, such as a reduction gearbox. This setup offers strong power, smooth operation, and precise control.
Boom and Rotating Mechanism
The boom is the primary component for lifting and recovering operations. It is typically constructed from high-strength steel, ensuring adequate strength and rigidity to support the boat's weight. The rotating mechanism allows the boom to rotate within a specified angle range, enabling accurate boat placement.
Wire Rope and Pulley System
Wire Rope and Pulley System:
The boom is raised and lowered by winding the wire rope around a pulley. This pulley system can adjust the direction and magnitude of the force, making operations more efficient and flexible. Additionally, the wire rope exhibits high strength and wear resistance, ensuring safety during lifting.
Control System
This system manages various actions of the electric Davit crane, including lifting and lowering the boom, rotating it, and adjusting its speed. Modern control systems typically employ advanced electronic technology and feature high automation, ease of operation, safety, and reliability.
Working Principle
The working principle of the Davit crane is to use an electric or hydraulic system to control the movement of the crane's boom, winch, and cables to lift the boat into the air, move it to a designated location, then lower it and put it back into the water.
The specific operating steps
extend boom
Extend the crane's boom over the boat to be lifted.
Fixed boat
Use the winch and wire rope to secure and fasten the boat.
Move the boat to the target location
Control the lifting and lowering movement of the winch and steel cable to lift the boat to the specified height, and at the same time, control the rotation and swing of the boom to move the ship to the target position.
Return the boat to the water
When the boat reaches the designated location, the winch and steel cable are controlled to lower it back into the water.
Application scenarios
The Davit crane is primarily used on various types of ships and is a crucial component of the ship's life-saving system. In emergency situations, such as fires or water leaks, the lifeboat can be quickly lowered into the water, facilitating the safe escape of passengers and crew. Additionally, the crane is useful for lifting small workboats and other equipment during routine maintenance, as well as for loading and unloading cargo.
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