Duct Machine

How to Make The Spiral Duct

How to make the spiral duct

Spiral Duct

spiral duct machine is to make a certain width of coil material into a spiral tube. The coil material is fed into the occlusal device through the driving mechanism and transmission mechanism. The occlusal device will coil the two sides of the coil material up and down respectively, and then through the guidance of the annular steel belt, the downward curling edge of the coil material and the upward curling edge are buckled with each other, and then the occlusal device wheel is rolled up and down relatively,

Press the crimps that are buckled together. In the existing air duct machine, due to rolling friction, friction with the mold, bending deformation and other processing processes, the coil belt material in the occlusal device will produce a lot of friction heat and processing residues.

The residues with higher temperature will be bonded on the inner and outer surfaces of the pipe. Because most of the processed pipes have longer length and smaller inner diameter, As a result, the residue on the inner surface of the pipe is not easy to be removed. Moreover, due to the long-time work of the mold in the occlusal device, under the high temperature environment, the error of the crimping size will be increased after thermal expansion,

the surface hardness of the die will be reduced, the surface hardness of the upper and lower occlusal device wheels will be reduced, and even the transmission shaft supporting the occlusal device wheel will be bent and deformed, resulting in the crimping of the mutual buckle can not be tightly pressed, Make the spiral duct appear water leakage, air leakage phenomenon, and the high temperature in the process will reduce the service life of the curling mold. Spiral Duct

How to Make The Spiral Duct
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The Main Uses of Spiral Duct

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1.Ventilation system: supply fresh air and exhaust, exhaust harmful gas outside, send outdoor fresh air indoors. Generally speaking, the flow of the ventilation system is very large, so it is necessary to use the air conveying pipe with small resistance to save the cost and operation cost. Generally, galvanized iron pipe is used, and stainless steel pipe is used in corrosive and especially humid places.            

2.Air conditioning system: spiral duct can be pasted with thermal insulation material, beautiful appearance.            

3.Oil fume exhaust system: there are a lot of oil fume in the kitchens of hotels, restaurants and hotels, which need to be discharged. Spiral duct is suitable, with good strength, economy and practicality.            

4.Dust removal system: the collection and transportation of dust removal device can use spiral duct.            

5.Bulk material transportation: pneumatic conveying system, some finer and looser material particles can be transported by spiral air duct, with low cost and good effect.

Characteristics of Spiral Duct

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Economy:

  1. According to the national standard, the plate thickness will be reduced by 10-15% for the same pipe diameter.          
  2. Under the same conditions, the results of full shape auxiliary materials are simple, the quantity is small, and the installation cost of auxiliary materials is reduced by 30%.            
  3. The hoisting efficiency is twice as high as that of rectangular duct.            
  4. Under the same conditions, the low-speed air supply and exhaust of air duct can be changed into high-speed air supply and exhaust. The system design can reduce the total amount of air duct, which is not only economical, but also saves space.

Possibility:

  1. Under the same plate thickness and the same pipe diameter, the spiral duct has high strength.            
  2. Under the same cross-section, the tension of circular duct is more reasonable than that of rectangular duct, which greatly improves the rigidity of duct and significantly reduces the chattering noise.            
  3. Under the same length, the number of flange connections is less, and the ventilation performance is better than that of rectangular duct, which greatly improves the ventilation quality of the system.

Nimble:

  1. Efficient construction, used in large projects with short construction period.            
  2. Mechanized production, fast and efficient.            
  3. The number of connecting flanges is small, and the lifting and connecting workload is reduced by about 50%.            
  4. Small diameter spiral air duct single lifting point, lifting fast and efficient.
  5. There is no need for on-site processing procedure to reduce on-site operation personnel and management procedures.            
  6. Compared with the rectangular duct, the standard degree of matching special-shaped pipe fittings is high, the hoisting is simple, and the error probability is greatly reduced.
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Spiral air pipe is a thin-walled circular pipe made of metal tape and material coil, which is mainly used in air conditioning and ventilation system. The material is mainly galvanized plate, and can also be made of stainless steel, copper, aluminum, color steel plate and micro perforated plate. It has the following advantages in different situations:

  • Air tightness:
  1. Each length of straight pipe is made of a whole piece of metal, which can achieve high air tightness.            
  2. When the spiral duct is installed, there are few pipe to pipe connections. The typical round duct length is 4-6m, while the rectangular duct length is only 1-1.5m. Round duct can be longer if allowed.            
  3. Only one connector is needed to connect two spiral air ducts, while two completely separated flange systems are needed to connect rectangular air ducts.
  • Consumables:
  1. Under the same cross-sectional area, the perimeter of rectangular duct is 13% longer than that of circular duct, the perimeter of rectangular duct with length width ratio of 1:2 is 20% longer than that of circular duct, the perimeter of rectangular duct with length width ratio of 1 ∶ 3 is 30% longer than that of circular duct, and the perimeter of rectangular duct with length width ratio of 1:4 is 41% longer than that of circular duct; Therefore, the circular duct production plate and installation of sealant and insulation materials are less than the rectangular duct.            
  2. Compared with rectangular duct, circular duct can use thinner insulation material. Lower density insulation can also be used.            
  3. The number and size of mounting brackets can be reduced. The distance between rectangular duct bracket and round duct bracket is 2.5m and 3M respectively.            

4. The superior structural characteristics of circular air duct fully allow the use of thinner plate processing in the same situation.

  • The pipe system of circular duct is standardized. Due to the standardization of size, a complete series of pipe fittings and joints can be made in advance. The connection of circular duct is simple. It only needs one person to install a circular duct, while it needs at least two people to install a rectangular duct.
  • The friction loss of circular air duct is smaller than that of rectangular duct. This is due to the significant reduction in airflow resistance and high air tightness of spiral round duct and its accessories. Therefore, when selecting the fan, the power of the matched motor also greatly decreases, which reduces the daily operation cost and the fan cost of the system.

1 thoughts on “How to Make The Spiral Duct

  1. Avatar of Taytlor Taytlor says:

    A good article on spiral air duct, which is very detailed. I want to buy a spiral duct machine. Please send the quotation to my email.

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