Folding tubular belt conveyor

The invention discloses a folding tubular belt conveyor, belongs to the technical field of belt conveyors, and aims to improve N winding unit racks mounted at the middle section of a folding tubular belt conveyor in the prior art. The folding tubular belt conveyor is characterized in that a middle cross beam and a lower cross beam are arranged in an n-shaped rack, left and right forward compression rollers are arranged at the upper half part in the n-shaped rack in a splayed manner, and the included angles between the left and right forward compression rollers and the horizontal plane are alpha respectively. Left and right return compression rollers are arranged at the lower half part of the n-shaped rack in a splayed manner, and the included angles between the left and right return compression rollers and the horizontal plane are gamma respectively. A return carrier roller is horizontally arranged on the lower cross beam. Left and right forward carrier rollers are mounted in an inverted splayed shape, the to