There are five types of connecting links, including flat arc tooth connecting link, V-LOCK vertical connecting link, chain lock flat connecting link, flat serrated connecting link and open-ended connecting link. There are more than 20 models in total.

Among them, the flat arc tooth connecting link is abbreviated as "arc tooth ring", which is called the flat connecting link for mining ring chain. It is a new type of arc tooth connecting link. It is mainly used for the connecting link between the mining ring chain specified in GB / t1218 for the scraper conveyor, transfer machine and planer in the coal mine.

V-LOCK vertical link, referred to as "vertical link", the full name is mining vertical link, or V-LOCK link, which can only be used for vertical link. The vertical connection without contact with the sprocket is adopted, so the damage caused by the manufacturing error of the sprocket to the link can be prevented.

Chain link flat type link, referred to as "flat ring", there are also called chain link or block type link on the market. Flat link can only be used for flat link. Special design is adopted for the special structure of chain wheel, which greatly increases the thickness of the easily worn part of the link.

Flat serrated link, referred to as "serrated ring", can be used either horizontally or vertically.

The open type connecting ring, abbreviated as "open ring", also known as Horseshoe Ring in the market, is mainly used for the double scraper conveyor and transfer machine under the coal mine, which are connected with the high-strength ring chain and scraper for mining