The connecting link is the connecting part of the scraper chain of the coal mine scraper conveyor, which plays an important role in the traction chain. Due to the special working conditions, the link often breaks during traction. Once the link is broken, the whole equipment will be paralyzed, which seriously affects the normal production of the coal mine. Not only the economy suffered serious losses, but also the search for broken chain and connecting link were carried out on the side of the coal wall, which was dangerous to some extent and even resulted in personal accidents. The link has a very high breaking capacity and requires high reliability in work. Therefore, the link replacement of link is studied. In the past, the influence of cylindrical pin is not considered in the analysis of butt link, but in fact, the effect of pin can not be ignored. For example, if you pull a rubber band hard, the middle part of the rubber band will be obviously concave and thin. The action of the pin is equivalent to applying a support force of a vertical action surface and an additional moment to prevent the middle part of the connecting link from thinning inward.
The connecting link for the compact chain vertical link is a kind of special connecting device between the "compact chain" segments of the conveyor chain in recent years. Because of its small size, it is different from the standard link. It is a vulnerable part, in the use process, the vast majority of the link links are due to the damage of the link parts and failure. The technical key point of the utility model is to strengthen the strength of the connection part of the link and the reliability of the connection. The connecting ring is composed of three parts. There are two semicircle holes and three t-tenons with inverted lock angle on the large half ring. There are two small semicircle holes and three T-joints with inverted lock angle on the small half ring. When connecting the chain, first put the end flat ring of the two chain segments into the two semicircles of the large half ring, and then fasten the small half ring from the side. When the T-joint is fully engaged in the mortise, drive in the spring pin. When the chain section is loaded, the t-tenon of the two half rings will be more and more tightly held due to the inclined angle of the inverted lock, and will not be damaged due to the expansion of the tenon.