How about the structural stability of spiral duct
Many people are not familiar with spiral duct fan equipment. At present, the spiral duct fan market is divided into three types: galvanized spiral pipe, stainless steel spiral pipe and composite spiral pipe. Among them, stainless steel pipes have good quality and strong applicability, but the price is high. Galvanized spiral duct is widely used in the market. Galvanized steel spiral pipe is basically the characteristic of stainless steel spiral pipe, but the price is only two-thirds or even lower than that of stainless steel pipe.
Design the ventilation duct according to the structure and environment of the place where the ventilation duct needs to be installed to ensure the practicability of the ventilation duct. The ventilation duct installation of general air supply and exhaust system and air conditioning system shall be carried out under the condition that the roof of the building is completed and the obstacles at the installation position have been cleaned.
Spiral air duct has a stable structure, not only because of its high strength in terms of material, but also because the material rigidity of this air duct is very good. With the help of the material, it can ensure that the air duct has a structure that is not easy to be damaged by external forces, and can reliably ensure the structural stability in use. When the structure is not prone to problems, the spiral air duct can always function reliably.
Spiral air duct is a thin pipe with spiral seam made of metal strip material roll. It is round without welding. It is often used for air supply and fresh air gas flow transportation to replace the past white iron pipe (i.e. manual seam iron pipe). It is a kind of ventilation pipe with full function. The circular pipe does not need to be hammered manually. The installation procedure of spiral air pipe obviously reduces the connection points between pipes, so as to reduce the leakage of the connecting part of spiral air pipe to a small degree. The length of general spiral air pipe is 3 ~ 6m, while the length of general square air pipe is only 1 ~ 1.5m; Only one pipe connector is needed to connect two spiral air ducts, while the connection of rectangular ventilation ducts in the past often required a completely independent double flange system. Undercut forming process: the dies selected for large equipment are of special steel structure. Even if they have been safely used for five years, the surface of the pressed die remains unchanged, so that the surface of the galvanized iron sheet is not damaged, which greatly prolongs the service life of the ventilation pipe. In addition, the plate joints are smooth, the undercut is dense, the connection force is strong and the sealing performance is good.