What is Spiral Duct Machine

A spiral duct machine is a machine for producing spiral ducts. Spiral air duct, also known as spiral bite seam thin-walled pipe, was first used in the military industry of western countries, such as the exhaust system of warships and ships, and later used in civil facilities such as trains, subways, and mines. By 2000, according to statistics, the use of spiral air ducts in office buildings, shopping malls, and subways in the United States reached 95.6%, and the application of spiral air ducts in central air-conditioning in residential buildings reached 72.5%.

1. Use:

The spiral duct machine is a thin-walled pipe made of a spiral bite made of metal strips. It is round, without soldagem, without air leakage, and without water leakage. It is mostly used for air supply and bulk material transportation, instead of traditional white iron pipes. It is a kind of air duct, the straight pipe of the whole mechanism does not require a manual beating. Its main uses are as follows:

● Air supply, including ventilation, such as fresh air supply and exhaust air, has a wide range, such as factory workshops and production site air. Due to the generation of harmful gases, it needs to be discharged outdoors, and outdoor air needs to be transported indoors. At this time, it is necessary to use the air conveying pipe with a large flow and low pressure. The spiral air pipe is the most suitable. Generally, the galvanized iron pipe is used, and stainless steel pipe is used in corrosive and particularly humid places.

● Send cold air. The most common is the pipeline of the central air conditioner, which requires insulation materials. The spiral air duct can be pasted with thermal insulation material, and the appearance looks beautiful.

● Exhaust fumes. The kitchens of restaurants, restaurants, and guesthouses produce a lot of oil fumes, which need to be discharged. The use of circular air ducts is the oil chimney. Here, the spiral duct should be called a fume duct.

● Dust off. In some factories, there is a lot of dust in the production workshop, and special dust removal devices are required. For pipes with large air flow, spiral air ducts can be used.

● Bulk material conveying. In the production process of some factories, it is necessary to transport loose particles, especially the use of spiral air ducts with low specific gravity such as foamed plastic particles, which has low cost and good effect.

2. Working Principle

Coiling – feeding – leveling and pressing – < bending – shearing, it can be matched with a reel machine and corresponding angle iron or cutting strip to form a plug-in flange.

Shearing and blanking, can be used with a plasma cutting machine

Punching and shearing square mouth and sharp mouth – cutting and blanking, it can produce TDF air ducts with T-12, TDF folding machine, reel machine, and corresponding corner code.

Punching mouth – double machine linkage forming – bending, shearing – two bones are interlocked to form a single flat bite, the spiral air duct and the plug-in flange strip can be matched to produce a cut-type flange.

3. Advantage of spiral duct machine

● Good product compatibility and a high degree of standardization;

● Strong airtightness;

● The ventilation loss is small; the ventilation noise is small, and the round pipe is better than the square pipe.

● Factory inspection is convenient;

● Anti-equilibrium external pressure (negative pressure) procedure;

● Material Province;

● Easy installation, few connection points, small installation space and low installation cost.

● The overall layout of the installation is beautiful and the grade is high.

● Easy to clean for daily maintenance.

● The wetted circumference of the section is small, the resistance along the path is small, and the energy loss is smaller.

● Fully machined, no secondary processing required for one-time molding.

● Using high-speed flying cutting machine, the pipe diameter has high accuracy.

● Four ways of reducing diameter socket connection, sleeve connection, flange connection and strap connection are adopted, which are more convenient for installation.

● The quality of thermal insulation outside the pipe is better than that of the rectangular duct.

4. Connection Method:

● Hoop-type connection of spiral air duct Hoop-type connection The two ends of each pipe section are rolled into drum bars, and one end is reduced into a small opening. When installing, insert the small opening into the large opening according to the airflow direction, and use a steel tow hoop on the outside to connect the two The drum rib at the end of the pipe is tightly connected and finally bolted through the earrings to fix and tighten.

● Spiral air duct plug-in connection The plug-in connection is mainly used for rectangular or circular air duct connections. First, make the connecting pipe, then insert the air ducts on both sides, and then use self-tapping screws or rivets to fix it tightly.

● Spiral duct insert type connection Insert strip type connection to rectangular air duct connection Insert different forms of inserts into both ends of the air duct, and then compact.

● The hose connection of the spiral air duct is mainly used for connecting the spiral air duct to the components (such as the air supply port on the side of the static pressure box of the diffuser, etc.). Clamp the hose tightly.

5. Auxiliary Equipment:

Since the spiral duct machine can only produce straight pipes, the elbow machine and other equipment have been developed. Among them, the double elbow machine can achieve a high degree of production flexibility through the simultaneous operation of two individual workbenches: one is the crimping operation. Table, one is the bite work table. The machine can therefore be used freely at any time without time-consuming conversions. Two workbenches work at the same time. The product is not only beautiful but also has a firm undercut, strong, and lightweight.