Protection switch of electric coal drill in coal mine

• Main Authors: ZHANG MENG, MAO XUEJING, LI HUAPENG, HAO FENG, MA HENGTAI, ZHANG HUA, WANG HONGBIN, MA JUNJIE
• Format: Patent
• Language: English
• Published: 14.01.2015
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The utility model discloses a protection switch of an electric coal drill in a coal mine, which comprises a switching circuit and a control and protection circuit, wherein the switching circuit is formed by a solid-state relay arranged on a three-phase line, the control and protection circuit is connected to two ends of the solid-state relay, the control and protection circuit comprises a conditioning circuit module and a trigger circuit module which are sequentially arranged in a series connection mode, the conditioning circuit module and the trigger circuit module are provided with a singlechip microcomputer module therebetween, and the input end of the conditioning circuit module is provided with a current transformer and a voltage transformer which carry out signal acquisition on current and voltage of the three-phase line respectively. According to the scheme disclosed by the utility model, the solid-state relay is adopted to act as a control switch of a main circuit, the singlechip microcomputer module is used to control on-off of the solid-state relay so as to carry out control and protection on equipment, and a power supply is cut off when electric leakage or a short-circuit fault occurs in the electric coal drill, thereby playing a role of protecting the electric coal drill. Meanwhile, the protection switch disclosed by the utility model can realize fault detection and real-time display for operating parameters of the electric coal drill, and the novel electric coal drill comprehensive protection switch is enabled to have intelligent characteristics.