English Views: 167 Author: Site Editor Publish Time: 2022-10-03 Origin: Site
The crane's control device allows the operator to direct the movement of the crane and hoist.
Cranes are lifting equipment used to lift heavy objects. The main motor of the crane (the motor that controls the ascent and descent) is a wound asynchronous motor. The starting torque is large, and the ability to lift heavy objects is strong. Install the reducer and brake device before and after the main motor. The front and back and left and right motors of the crane generally use squirrel cage asynchronous motors.
The ground operation method generally requires the operator to complete the operation on the ground through the control handle interconnected with the crane, but this operation method is relatively close to the heavy object, and has a higher safety risk factor.
Generally speaking, large cranes are usually used in the operation mode of the cab. The staff's field of vision is relatively narrow, and commanders are generally assigned to assist in the operation.
The staff who use the remote control operation mode are relatively relaxed and will not get too close to the heavy objects. It is a safer crane operation method, and it is also the most popular crane operation method at present.
The crane is usually controlled by a wire handle, and when the handle is used, people must follow the crane to move. There is no remote control convenient when it is used.
The use of cranes by some customers is no longer a single operation method. The crane button switch is widely used. In electrical automatic control circuits, it is used to manually send control signals to control contactors, relays, electromagnetic starters, etc.
The button switch can complete basic control such as start, stop, forward and reverse rotation, speed change and interlock.
The reliable pendant system and ergonomic design changes make the crane pendant control device more comfortable for the operator to use. Today's pendants are smaller and lighter in design and can be operated with one hand.
The pendant control device has its sturdy design, which has strong resistance to mechanical damage and contaminants. Its design has the following advantages: high impact resistance, corrosion resistance, moisture resistance, dust resistance, and insulation. The pendant hangs on the crane itself and is always available at any time. The operator does not have to worry about finding it or tracking it like a radio transmitter.
However, in harsh operating environments such as high temperature, dust, harmful gas, high altitude, and nuclear radiation, the operator is always close to the load.
Because of the long control distance, strong anti-interference, and simple installation, wireless remote control has appeared more and more in various industries in life. The wireless communication transmission equipment can be used to remotely control the crane.
After the wireless remote control system is used, the operation, mooring, hanging and unloading can be undertaken by one person alone, without commanding personnel. For operations that require two or more lifting equipment to participate at the same time, only one operator is required to operate. And it can be completely synchronized and judged independently by the operator, ensuring the accuracy and continuity of the operation, and the work efficiency is significantly improved. There is no need to go up and down the cab for high-altitude operations, avoiding the high temperature driving in high temperature weather and affecting the physical and mental state of the operator. The operator can choose a suitable location to avoid the harsh working environment such as dust, which guarantees the health and life safety of the operator to the greatest extent.
