来源：http://ccjsjlm.com沙巴体育下注 日期：2019-06-10 发布人：admin
1. Good fireproof function: At that time, the common problem was that the burning function and fireproof limit of product ventilation duct had not been inspected by relevant state departments, and the burning function and wall thickness of some ventilation duct materials did not meet the requirements.
2. Low cost: Jinan ventilation duct can save about 40% of the project cost compared with the traditional brick ventilation duct.
3. Light weight and high strength: Compared with traditional brick ventilation duct, magnesite ventilation duct has light weight and high strength, which can greatly reduce the bearing load of buildings.
4. Planning flexible network: ventilation pipeline can adjust the standard standard of pipeline at any time according to the size of reserved holes;
5. Planning together: flue gas check valves and fire barrier doors are installed at the opening of the ventilation pipeline, which can be used to prevent cross-smelling and crossfire.
6. Brief construction: Increased indoor space, good airtightness, no smoke return, no odor return, can greatly improve the indoor environment.
The helical duct will produce certain noise in the process of operation, assuming that in residential and commercial areas will have a great impact on people's lives. So how do we reduce noise in the construction process?
The working noise of ventilation duct system generally comes from the following aspects:
Flutter of air duct. Because the material of air duct is galvanized sheet or metal material, the thickness of steel plate and construction technology should be strictly selected according to construction inspection standards, such as air duct errors, flatness, air duct reinforcement, support and hanger selection and production equipment, etc. At the construction stage, the outlet should not be close to the equipment as far as possible. The length of the electric fan should be more than 5 meters before and after it. It is assumed that the number of elbows can be increased and the noise can be reduced. A filter is installed in the tuyere, and the noise control function is also very good.