Cleaning machine for drain and sewage pipes, with an electromotor drive for the cleaning tool on a spring shaft, has a control to cut the power on a serious blockage to prevent a motor burn-out

摘要

The machine for cleaning drain and sewage pipes, and the like, has an electromotor (3) for a drum with a spring shaft (6) to carry a cleaning tool. The motor speed is registered by a sensor (8), transmitting a proportion signal to a microprocessor (10) where the actual speed value is compared with a nominal speed to operate a power control (13) so that the motor is switched off if its speed drops below the nominal level. The power supply is cut if there are no motor speed signals.