In the modern installation project, with the advancement of science and technology, new materials and new technologies emerge in an endless stream during the manufacture and installation of air-conditioning ducts. The common flanged air duct is one of them. The air duct adopts a fully automatic production line, combined with advanced digital control and fiber optic information technology in the world. In addition to producing galvanized straight rectangular air ducts, it can also produce various special-shaped air duct parts such as elbows, tees and crosses. Play an increasingly important role in the installation project.

1. Features of engineering methods

1. The production line has a high degree of mechanization and automation, which greatly improves the production efficiency and the production accuracy of the air duct, and reduces the project cost.

2. The self-made flange of the air duct reduces the weight of the air duct. Compared with the traditional angle iron flange, it saves the flange steel and connecting bolts and reduces the material loss.

3, air duct sealing is good, significantly reduce the air leakage, save energy, reduce the host operating costs.

4. Ducts are pressed automatically by the air ducts. The strength is high and the appearance is beautiful and clean. The zinc-free layer is damaged.

5, production and installation of fast, reduce labor intensity, improve labor efficiency, meet the needs of modern engineering, and improve the competitive advantage of the installation unit.

2. Process principle

a. Enter the computer according to the caliber and shape of the air duct on site, and control the equipment to be fed by the program software.

b. Using the mechanism TFD flange forming machine, flanges are formed on the air duct. Use this device to make the corresponding connection flange angle.

c. When installing on site, use flange angle and flange fixing card to connect the air duct to achieve the installation purpose.

3. Air duct production

(1) Thickness specifications

(2) Draw air duct sketches

According to the construction drawings and the actual situation of the site (air duct elevation, direction and coordination with other professional) according to the system served by the air duct to draw a processing sketch, and according to the system number.

(3) Straight pipe production process

According to the sketch, input the air duct size to the computer → enter the galvanized sheet in the production line to straighten → press the ribs (big side size> 630mm) → cutting machine cut angle → shears shears → bite mouth (socket and socket) → mechanism TFD Flange forming machine → bending machine bending (according to the size of the aperture into a letter, L-shaped, U-shaped, mouth shape) → quality inspection.

(4) Shaped pipe (elbow, three links and other accessories) production and production process

According to the drawings, the computer made a cutting map → FPC3600 plasma cutting machine cuts out the semi-finished products → single machine bite socket and socket → TFD flange forming machine → bending machine bending → quality inspection.

(5) After the production of the air duct is completed, strength and tightness tests are carried out to test or verify the process performance.

4. Air duct installation

(1) Duct reinforcement

1 When the size of the large side of the air duct is between 630 and 1000mm, it is reinforced directly in the production line and the arrangement should be regular. The interval should be uniform and there should be no obvious deformation on the board surface.

2 When the size of the large side of the air duct is more than 1000mm, the inside and outside of the pipe can be reinforced by angle steel, flat steel, steel pipe, Z-shaped groove, reinforcing ribs, and wire screw.

5. Finished product protection

(1) The installed air duct should be smooth and clean, and the outer surface of the heat-insulated air duct should be clean and free of debris. Outdoor wind pipe should have rain and snow measures. In particular, secondary pollution should be prevented and protective measures should be taken when necessary.

(2) The duct system for temporary suspension of construction shall be open and closed to prevent debris from entering.

(3) It is strictly forbidden to use the installed air duct as a hanger or as a springboard, and it is not allowed to weld or hang other branches or hangers on the duct flange, wind pipe branch or hanger.

6. Safety precautions

1, in the production workshop work, the implementation of a variety of equipment management, all parts of the operation of the equipment must have protective cover and other protective measures, strictly abide by the rules of operation of the equipment.

2, in the galvanized steel handling process, be careful not to scratch the hands and feet.

3, various equipment emergency stop protection switch to be flexible and reliable.

4. In the on-site hoisting process of the air duct, special personnel are required to conduct the command. The selection of the hoisting point should be firm and reliable, and it is forbidden to stand under the air duct when hoisting.

5. The leakage protection switch of various small electric tools used at the site should be flexible and reliable.