Seven protections for belt conveyor: coal blocking transducer, temperature transducer, speed transducer, disalignment transducer, smoke transducer, emergency stop switch, rip transducer;
(1) Speed protection (GSC speed transducer): the belt conveyor is running, however, the driven roller does not work for 5-10S continuously, the failure alarm in low-speed remains on-delay about 2S ± 1S.
(2) Stacking Protection (GUJ30 coal blocking transducer): When the guide rod of the transducer deviates 45 ° ± 5 ° from the center line, 13s delay time can realize protective stop on error.
(3) deviation protection (GEJ30 disalignment transducer): when the guide rod of the disalignment transducer deviates 15 ° ± 5 °from the center line, the delay of 10S ± 5S can achieve deviation fault protection.
(4) smoke protection (GQQ0.1 smoke transducer): as soon as the smoke emerge, the smoke transducer sends signal to the host which will take immediate smoke protection.
(5) temperature protection (GWD temperature transducer): When the temperature in the monitoring point exceeds the limit temperature(+80 ℃), temperature protection on error will be executed immediately.
(6) Emergency stop protection along the line (KHJ emergency stop switch): When one of the emergency stop switches along the line is turned on, the product immediately implements the stop protection function.
(7) tear protection (GVD rip transducer) : when tearing happens, the transducer sends signal to the host which takes immediate stop protection.