2results about How to "Increase weld length" patented technology

The spiral steel pipe stable welding equipment comprises a bottom frame and a mounting base, the mounting base is arranged at one end of the bottom frame, a guide roller set and an inner welding machine are arranged on the lower portion of the mounting base, and an outer welding machine and a re-guide roller are arranged on the upper portion of the mounting base; a plurality of groups of first conveying rollers which are used for supporting the spiral steel pipe to rotate and do translational motion are arranged on the bottom frame, each first conveying roller comprises an inner roller shaft and an outer spiral belt, the cross section of each outer spiral belt is rectangular, the outer spiral belts are wound and fixed on the inner roller shafts, and the outer spiral belts and the outer surface of the spiral steel pipe are arranged in a tangent rolling manner; every two first conveying rollers form a group and are oppositely arranged, and the first conveying rollers are distributed in the axial direction of the spiral steel pipe at intervals. The unique spiral steel pipe bearing roller is designed, static friction is used for replacing sliding friction to push a spiral steel pipe to move, and the stability of the spiral steel pipe in the welding process is guaranteed.

The application relates to the field of building construction and discloses an attached support rod and a tower crane. The attached support rod comprises an angle steel column and end plates. The angle steel column comprises a plurality of sequentially arranged connecting angle steels. One of any two adjacent connecting angle steels is provided with a connecting notch, and the other connecting angle steel is provided with a connecting protrusion. The connecting notch and the connecting protrusion are matched in shape and are connected through a connecting inclined surface. The two end plates are oppositely arranged along the length direction of the angle steel column, and the two ends of the angle steel column correspond to the two end plates respectively. Through the matched connection of the connecting notch and the connecting protrusion and the connecting inclined surface welding, the overall structural strength and stability of the attached support rod are significantly enhanced. The short connecting angle steels are overlapped to form an angle steel column with a required length, and the heavy flange plates or ear plates and other accessories in the traditional lengthening mode are replaced. Therefore, the material utilization rate is greatly improved, and the waste of additional connecting parts is avoided.