The spreaders equipped with modern container bridge cra […]
The spreaders equipped with modern container bridge cranes are different according to the manufacturing age and the weight. For some early bridge cranes (pre-2002), PLC logic controllers are basically installed on the bridge cranes.container spreader The upper control system only executes the instructions issued by the bridge crane, and feeds the execution result back to the bridge crane PLC. There is almost no logic processing capability in the control system of the spreader itself; in the case of the lockable movable double 20-foot spreader The PLC was installed on the spreader, and the spreader had its own ability to handle the problem, especially the handling of the lock function.
Since the PLC is installed on the spreader, the manufacture, commissioning and maintenance of the spreader bring higher requirements, especially as the spreader's service life increases, the electrical fault of the spreader will become higher and higher. The selection of the components of the electrical system of the spreader must meet the harsh environment of high vibration and all weather when the spreader is in operation.
The spreader power station is the power source of the hydraulic spreader, and the power of all the spreaders is derived from this. Usually, the system converts electrical energy into mechanical energy by a motor, and the variable displacement piston pump converts mechanical energy into hydraulic energy. The variable displacement piston pump provides a cylinder and an oil motor driven by various actions of the spreader to realize various action functions of the spreader.
When the spreader is to be loaded and unloaded, the spreader must be operated under the joint action of the crane hoisting mechanism and the trolley mechanism, so that the spreader is correctly placed on the container, the four lock pins of the spreader (single box state) or eight lock pins (double The box state) correctly enters the corresponding lock hole of the container, and the bed pin is subjected to the upward action of the gravity of the spreader, so that the implantation limit action installed beside the bed pin tells the driver that the lock pin has correctly entered the container. A keyhole that allows commands to unlock and lock.