stay Ventilation pipe construction In addition to air ducts, there are also some supports and hangers and other spare parts, so its device is divided into two parts, one is air ducts, including spiral air ducts, rectangular frame air ducts, etc., and the other is supports and hangers. Let's introduce these two parts in detail.
1. Air duct
(1) Iron sheet Ventilation duct The device for expanding the air duct shall be removed during the construction of the bent structure of the building and its site.
(2) Before installing the air duct, check the position, design elevation and direction of the air duct to ensure that they comply with the rules of the design scheme, the position of the embedded hole should be appropriate, and the size of the hole should exceed the outer specification of the air duct by 100 mm or more.
(3) When transporting air ducts, collision or rolling shall be prevented to prevent damage to air ducts. Dust and dirt shall be removed before installation. If there is any discontinuity in the whole process of installation, the air duct orifice shall be closed to prevent dust and dirt from entering the air duct.
(4) The socket of air duct shall not be installed in the wall or concrete floor, and pipes, cables and their cables shall not be laid in the air duct.
(5) If the air duct is used to transport flammable and explosive materials, or is in such a natural environment, it should be equipped with necessary grounding devices for safety protection; If the gas temperature is higher than 80 ℃, necessary protective measures shall be taken.
(6) The bottom end of the air duct is not suitable for an accumulation joint, if any, it should be well sealed.
(7) If the air duct is to cross the concrete floor or wall, the embedded pipe or safety protection waterproof sleeve shall be used, and flexible raw materials shall also be used among them for plugging.
(8) When the air duct is connected with the machine equipment, there should be flexible short pipes at the connection, with the length of 150-300mm, or the required length rules.
(9) The position of the air duct measurement hole should not be in the area of vortex formation, and should be conducive to accurate measurement and observation.
2. Supports and hangers
(1) The use of common raw materials for all spare parts of supports and hangers shall comply with the design scheme rules and the main parameter rules.
(2) Under the large allowable device spacing of the air duct, the small size and model of the support shall meet the requirements.
(3) The embedded parts of supports and hangers shall be properly installed and reliable. The embedded part shall be removed and the exposed part shall be subject to anti-corrosion treatment.
(4) The supports and hangers are not suitable to be built in the practical operation position of machinery and equipment. When the supports and hangers are unfolded and fixed, the expansion anchor bolts should be used for expansion and fixation. The use of expansion anchor bolts should meet the requirements and rules.
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