TWO-BRANCH OR MULTI-BRANCH DOUBLE-LAYER WEAR-AND-IMPACT-RESISTANT TUBE AND MANUFACTURING METHOD THEREOF

摘要

A two-branch or multi-branch double-layer wear-and-impact-resistant tube and manufacturing method thereof. The wear-and-impact-resistant tube comprises an outer protective tube (1) and an inner wear-resistant assembled tube (2) nested in the outer protective tube (1). The inner wear-resistant assembled tube (2) comprises two or more tube walls, the two or more tube walls are jointed to form a tube having an annular cross section. The wear-and-impact-resistant tube can be a straight tube or a bent tube. If the wear-and-impact-resistant tube is a straight tube, upper and lower portions of the inner wear-resistant assembled tube employ different structures, and if the wear-and-impact-resistant tube is a bent tube, a large curved portion and a small curved portion of the bent tube employ different structures. The inner assembled tube of the wear-and-impact-resistant tube is divided into at least two portions, and the at least two portions thereof employ different structures. The tube structure extends a service life thereof, improves wear resistance and impact resistance thereof, and reduces a total weight of the tube.