The chain conveyor uses the chain as the traction and carrier to transport materials. The chain can be an ordinary sleeve roller conveyor chain or various other special chains (such as accumulation and release chains, double speed chains). The chain conveyor has a large conveying capacity and is mainly used to convey pallets, large turnover boxes, etc. Conveyor chains have various structures and accessories, which are easy to realize accumulation and transportation. They can be used in assembly production lines or as storage and transportation of materials.