The spiral air duct has exquisite reinforcement limiting technology, which makes the spiral air duct accept strong pressure. The thickness of the submerged joint at the undercut is four times that of the pipe body. The pipe has great rigidity, showing the superiority of firmness. It can accept large pressure load without damage and deformation, and the material thickness can be reduced by 15%.
This greatly reduces production costs. In addition, we need to know that the manufacturing process of spiral duct is very. It is generally made of special steel, and its quality is naturally guaranteed. It can be used for several years. The combined action can also ensure the long-term use without deformation, greatly extending the service life of the air duct, which has important practical significance for our production.
Spiral air duct is manufactured by using steel strip roll, biting out the biting shape at one time with air duct forming machine, rolling it into a circular tube along the spiral involute track, pressing the biting seam together, and then cutting it according to the required length. Since it was put on the market, it has been widely used in shipbuilding, ventilation, air conditioning, purification, bridge dust removal, airport, tunnel and other construction industries because of its excellent performance and low operation cost.
The common way to supply cold air and hot air is the air conditioning pipe, which needs heat preservation. In addition, thermal insulation materials can be pasted inside to make the air duct have a beautiful spiral appearance, avoid the ceiling and reduce the project cost. The manufacturing automation of spiral air duct is high and the production speed is very fast. The general air duct can produce 20 ~ 40m per minute, because the price of the raw material galvanized strip steel is lower than that of the overall galvanized steel plate, and its industrialized production and standardization make the cost lower than that of the rectangular air duct.
After the spiral air duct is equipped with advanced technology and equipment, if the processing equipment corresponding to other processes is equipped, the processing progress and quality of the air conditioning air duct in each process will be greatly improved. However, the processing technology is still multi process separate processing, which still requires a lot of manpower to rotate on multiple equipment. The processing planning, processing power and quality of the air conditioning air duct are still at a low stage. Fortunately, after the common plate flange connection technology is selected, the processing procedures of air conditioning duct are not only reduced, but also many manual operation procedures are saved, such as blanking, corner cutting, rib pressing, common plate flange forming, corner seaming, assembly and so on.
The joint is circumferential and its strength is much higher than that of the radial direct head. Therefore, no crack can be ensured at the joint under 1.5 times the working pressure. Because the raw material galvanized steel strip is lower than the whole galvanized steel sheet, its industrialized production and standardization make the cost lower than that of the rectangular air duct; In addition, the total cost is low due to small demand for supports and hangers and small installation workload. As the four corners of the rectangular air duct are prone to turbulence, the useful flow area is reduced, the air fluidity is good, the useful flow area is large, and the secondary noise of the product is small due to its high intensity. Therefore, the low-frequency noise caused by air duct vibration is less, the air flow performance is good, the system pressure drop is small, and the daily operation system consumes less power.
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