The electric control system is mainly composed of dust-proof electric control cabinet, PLC programmable controller(optional), ampere meter, emergency stop, manual key switch, contactor, button, indicator, control element, and so on.
The electrical control of this sandblasting room can realize automatic system control (ie interlocking function), and can also realize individual control of each unit. Automatic control is suitable for normal production use, and separate control is especially necessary for equipment maintenance.
PLC programmable automatic control has manual and automatic states, and has a switching function. When the system is in a maintenance state, each device can be controlled separately; when the system is in a normal state, each device is operated according to a predetermined procedure, and has a certain interlocking function.
Each equipment has good electrical protection. When the equipment fails, it can be safely and reliably protected, and automatically stop the lower-level operation and send out an alarm message. After the fault is removed and a normal instruction is issued, it can be restarted.
In the control of the fan, the star-delta starting method is adopted to reduce the starting current of the motor. In terms of safety, the control loop is equipped with overload, reverse and phase loss protection functions, which more effectively protects the motor, Avoid damaging the motor due to overload, reverse and phase loss. In the circuit design, try to use standard modules, reduce the number of electrical components, reduce the amount of wiring, and reduce the source of failure of the electronic control system to a minimum.
There are junction boxes on each control device, which is convenient for disassembly and assembly of the equipment and convenient for the maintenance of electrical appliances.
All switches, power systems, motors, buttons, signal lights, and main switches of the electronic control system are controlled and detected by the control cabinet. Two cooling fans are installed on the control cabinet. The main circuit part is equipped with overload protection and leakage protection. When the circuit is short-circuited or there is The power supply can be cut off in time in case of electric leakage. The sandblasting host is equipped with a loading level alarm switch. When the system detects that the sand in the sandblasting tank is higher than the loading level, it will give an audible and visual alarm.
Emergency stop switches can be set in the control cabinet and the sandblasting room to quickly stop the operation of the entire equipment when an accident occurs, effectively ensuring the safety of personnel and equipment.