This utility model relates to the field of low-temperature resistant sheathing technology, and discloses a low-temperature resistant sheathing tube, including a tube body, a
nitrogen layer, and an inner column. The tube body has a hollow cavity inside, and an insulating
airbag is fixedly connected to the inner wall of the hollow cavity. The outer wall of the
nitrogen layer is fixedly connected to the inner wall of the insulating
airbag. An outer column is fixedly connected to the inner wall of the tube body, a
sponge is fixedly connected to the inner wall of the outer column, and a dehumidifying layer is fixedly connected to the outer wall of the inner column. A passage component is provided on the inner wall of the insulating
airbag, and a reinforcing component is provided on the outer wall of the tube body. In this utility model, a hollow cavity is formed in the tube body, and an insulating airbag is placed in the hollow cavity.
Nitrogen gas is injected into the insulating airbag through an inflation port. The interior of the insulating airbag is filled with chambers and air channels. Both the outer and inner columns are equipped with sponges and supplemented with a dehumidifying layer. The entire structure achieves efficient heat preservation and
drying effects inside the tube body, providing a stable temperature environment for internal pipelines and cables.