Chain tension automatic adjusting device of scraper conveyer

A chain tension automatic adjusting device of a scraper conveyer comprises an adjusting hydraulic cylinder, a hydraulic stabilizing mechanism, a liquid inlet pipe connector, a liquid return pipe connector and a shutdown locking button. The adjusting hydraulic cylinder comprises a right cavity, a telescopic rod and a left cavity. The telescopic rod is connected with a chain wheel of the scraper conveyer. The chain wheel of the scraper conveyer is controlled to move leftwards and rightwards through stretching and retracting of the telescopic rod, so that a chain of the scraper conveyer is tensioned or loosened, and the tension of the chain is adjusted. The hydraulic stabilizing mechanism is connected with the right cavity of the adjusting hydraulic cylinder, the liquid inlet pipe connector and the liquid return pipe connector. Liquid is injected into or discharged from the right cavity through the liquid inlet pipe connector or the liquid return pipe connector, so that liquid pressure in the right cavity is kept in a set range, and accordingly the telescopic rod is controlled to stretch and retract. The chain tension automatic adjusting device can guarantee that the chain of the scraper conveyer always runs at optimal tension, the service life of the chain of the scraper conveyer is effectively prolonged, maintenance frequency is reduced, and maintenance strength is reduced. Besides, production efficiency of a fully-mechanized mining face is effectively improved.