The chain tensioner of the scraper or the chain tensioner of the transfer machine is divided into manual chain fastener and hydraulic chain fastener. By applying certain pre-tightening force to the chain of the scraper, the scraper conveyor can operate safely. When tightening the chain, fix one end of the chain scraper on the side plate of the nose frame or chain chute, and bypass the other end of the chain wheel of the head to make the chain wheel reverse, and then the chain scraper is strained. When the chain tension of the chain scraper is appropriate, the chain scraper will brake to prevent the chain of the chain scraper back loose. After the two chain heads are connected, the chain scraper will remove the brake. The working principle of the chain tensioner is very simple to look at and easy to operate. It is also the spare parts of the scraper that can be purchased in the daily life of coal mine. Henan Shuangzhi Machinery focuses on the production and processing of scraper conveyor parts, more scraper parts welcome to pay attention to us!