Mining intrinsic safety pilot circuit

• Main Authors: SU WEIFENG, YUAN KUIXING, GOU RUIFENG, WEI SANMIN, LI XIA
• Format: Patent
• Language: Chinese; English
• Published: 16.04.2014
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

The utility model discloses a mining intrinsic safety pilot circuit. The mining intrinsic safety pilot circuit comprises a normal close type button switch K1 and a normal open type button switch K2 which form a control loop with a transformer side, a hysteresis comparator which is in series connection with the two control switches K1 and K2 and is used for detecting the voltage of the current loop and outputting a logic signal according to the states of the two control switches, and a logic circuit which is connected with the hysteresis comparator, produces a logical judgment according to the logic signal output by the hysteresis comparator, and drives a stem node K3 to break or close. According to the mining intrinsic safety pilot circuit provided by the utility model, no programmable logic controller and the like are used for complicated control judgments, both the circuit structure and the control logic are simple, the usability is strong, the cost is high, and a short circuit preventing function can be we