Strip, manufacturing method thereof and hard negative pressure spiral air duct made of same

Abstract

The invention discloses a strip, a manufacturing method of the strip and a hard negative pressure spiral air duct made of the strip. The air duct comprises the strip which is integrally of a continuous strip-shaped structure, and the strip is wound in a spiral shape. The section, perpendicular to the length direction, at any position of the strip comprises a strip body, a first channel and a second channel, wherein the first channel and the second channel are located on the two sides of the strip body respectively, and the open direction of the first channel and the open direction of the second channel are opposite and perpendicular to the plane where the strip body is located. When the hard negative pressure spiral air duct is transported, people can only transport the strip, and after the destination is arrived, the strip is wound in the spiral shape and assembled into the hard negative pressure spiral air duct, so that transportation is convenient; moreover, hard negative pressure spiral air ducts with different diameters can be obtained by adjusting the winding angle, and therefore transporting space and cost can be saved greatly.

Description

technical field [0001] The invention relates to the field of an air guide, in particular to a strip, a manufacturing method of the strip, and a rigid negative pressure spiral air guide made of the strip. Background technique [0002] The air duct is a necessary setting for ventilation when working in mines, tunnels, air-raid shelters, subways and other construction sites, and it is one of the necessary ventilation safety supplies to ensure the safety of workers. At present, most construction sites use negative pressure ducts to extract toxic, suffocating and flammable gases. [0003] Existing negative pressure air guides are mainly divided into flexible air guides with lining skeletons and hard air guides. [0004] Rigid air ducts mainly include plastic bellows, glass steel pipes and metal ventilation pipes. [0005] Plastic corrugated pipes and FRP ventilation pipes are usually produced and shaped, and then transported to the installation site for corresponding installati...

AI Technical Summary

Problems solved by technology

However, the cost of stainless steel and galvanized materials is on the high side, while iron sheet materials are easy to rust

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