There are three types of sunk rollers currently used in the factory: slotless sunk rollers, straight groove sunk rollers and spiral groove sunk rollers. The existing spiral groove type sinking roller includes a cylindrical roller body and roller shafts provided at both ends of the roller body. The outer surface of the roller is provided with a spiral groove, and the cross section of the spiral groove is U-shaped. When using the existing spiral groove sink roller, the zinc solution is stirred and adhered to the surface of the plate to be galvanized, and the excess zinc solution enters the end of the roller body under the rotation of the sink roller to prevent the zinc solution from forming on the surface of the sink roller. However, the opening of the spiral groove of the existing spiral groove buried roller is wider, the zinc liquid is not easy to be stored in the spiral groove, the bottom of the spiral groove is narrower, and the adhesion of the zinc liquid is larger, which is not conducive to flowing in the spiral groove. Due to the limitation of the spiral groove structure, the service life of the existing spiral groove sinking roller is 7-8 days, which cannot meet the requirement of 10-12 days for the sinking roller of the galvanizing production line.

Sinking roller is one of the important equipment parts of galvanizing production line. In the galvanizing pot of the galvanizing line, the working temperature reaches 600-700 ℃. During the production process, the whole sinking roller needs to be immersed in the zinc liquid, and the zinc liquid is stirred with the stabilizing roller and sticks to the surface of the galvanized sheet. The surface structure and quality of the sunk roller directly affect the quality and service life of the galvanized sheet. Therefore, the sinking roller is one of the key factors that determine the production quality and efficiency of the galvanizing production line.

The beneficial effect of the sunken roller is to set the cross section of the spiral groove as a dovetail groove, so that the opening of the spiral groove is narrowed and the bottom is widened, which is beneficial to the storage of zinc liquid in the spiral groove and the flow of zinc liquid in the spiral groove. The utility model avoids the nodulation of zinc liquid, improves the service life of the sink roller, reduces the waste of zinc liquid, and improves the quality of zinc plating. number. The side wall of the spiral groove is connected to the outer peripheral surface of the roller body through a convex arc structure. Under the shunt effect of the convex arc structure, the zinc liquid can enter the spiral groove. In addition, the bottom of the spiral groove is connected to the side wall of the spiral groove through a concave arc structure, which further promotes the flow of zinc in the spiral groove