Adopting foreign advanced technology and craft, Shanghai Jiadi is the first factory in domestic who uses the structures of no screw between lifting scraper and flat chain board and chain. This structure can avoid the off of the screw which can damage the later device. It is stable and reliable to lift and convey the material. The scraper is made of stainless steel to expand the working life. With the oil collecting plate and floor type oil pipe guide to guarantee the sanitary of the food material. With the axletree water-proof device to expand the working life. With the chain tightening and expanding device to adjust the chain.