通风管安装工程中风管的加固和防火做法

发布人：http://www.sftfgd.com   发布时间：2022-06-18 17:46:00

风管是整个工程的“呼吸道”，风管系统在安装时关重要，不仅决定了系统安装后的美观度更重要的是决定了系统的功能性，因此控制风管安装的质量关重要。

Air duct is the "respiratory tract" of the whole project. Air duct system is very important during installation, which not only determines the aesthetics of the system after installation, but also determines the functionality of the system. Therefore, it is very important to control the quality of air duct installation.

风管安装时应严格按照图纸施工，正式施工前应做好进度策划并提前制定好施工方案，对操作工人及时做好技术交底。

During the installation of air duct, the construction shall be carried out in strict accordance with the drawings. Before the formal construction, the progress planning shall be made and the construction scheme shall be prepared in advance, and the technical disclosure shall be made to the operators in time.

同时，风管的安装施工，除自身工作外，还需要做好与土建之间的协调配合，避免交叉作业给管道施工带来不便和影响。

At the same time, in addition to their own work, the installation and construction of air ducts also need to coordinate with the civil engineering discipline to avoid the inconvenience and impact of cross operation on pipeline construction.

通风管安装中，也一定要按规范要求采取加固措施

During the installation of ventilation pipe, reinforcement measures must also be taken according to the specification requirements

1、圆形风管的加固：圆形风管由于其本身的强度较高，而且风管两端的法兰起到一定的加固作用

1. Reinforcement of round air duct: because of its high strength, the flanges at both ends of the round air duct play a certain role in reinforcement

当圆形风管的直径大于或等于800mm，且其管段长度大于1250mm或管段总表面积大于4m2时，每隔l500mm才加设一个扁钢加固圈，并用铆钉固定。

When the diameter of the circular air duct is greater than or equal to 800mm, and the length of the pipe section is greater than 1250mm or the total surface area of the pipe section is greater than 4m2, a flat steel reinforcement ring is added every l500mm and fixed with rivets.

为了防止咬口在运输或吊装时裂开，圆形风管的直径大于500mm时，其纵向咬口的两端用铆钉或点焊固定。

In order to prevent the undercut from cracking during transportation or hoisting, when the diameter of the circular air duct is greater than 500mm, both ends of the longitudinal undercut shall be fixed with rivets or spot welding.

2、矩形风管的加固：与圆形风管相比，矩形风管自身的强度低，易于产生变形。

2. Reinforcement of rectangular air duct: compared with circular air duct, rectangular air duct has low strength and is prone to deformation.

当矩形风管的大边长大于或等于630mm，保温风管大边长大于800mm，管段长度在1250mm以上，或低压风管的单边平面积大于1.2m2，中、高压风管大于1.0m2时，

When the large side length of rectangular air duct is greater than or equal to 630mm, the large side length of insulation air duct is greater than 800mm, the length of pipe section is more than 1250mm, or the single side flat area of low-pressure air duct is greater than 1.2m2, and the medium and high-pressure air duct is greater than 1.0m2,

为了减少风管在运输和安装中的变形，制作时采取加固措施。

In order to reduce the deformation of air duct during transportation and installation, reinforcement measures shall be taken during fabrication.

通风管防火包裹的做法

Practice of fire-proof wrapping of ventilation pipe

1、如果风管的材料不耐火，但是又有可能接触明火，比如说一段PVC材料的通风管被架设在加热器附近，那么就有必要做防火处理。

1. If the material of the air duct is not fire-resistant, but it may be exposed to open fire. For example, a section of PVC air duct is erected near the heater, then it is necessary to carry out fire prevention treatment.

2、如果风管输送的气体易燃易爆好是有防火包裹。比如一个正压风管输送带有油烟的废气，防火包裹能延长通风管耐受时间，避免风管烧毁，大量气体溢出会导致爆燃。

2. If the gas conveyed by the air duct is flammable and explosive, it is better to have a fire-proof package. For example, a positive pressure air duct transports exhaust gas with oil smoke, and the fire-proof wrapping can prolong the withstand time of the ventilation duct to avoid the burning of the air duct, and a large amount of gas overflow will lead to deflagration.

3、如果风管输送的气体对温度敏感，可能是气体组分对温度敏感、容易温度变性。这时不仅要有恒温处理，也要有防火处理，以免意外情况发生。

3. If the gas conveyed by the air duct is sensitive to temperature, it may be that the gas components are sensitive to temperature and easy to change temperature. At this time, there should be not only constant temperature treatment, but also fire prevention treatment to avoid accidents.

4、如果是暴露在高温易燃环境，风管一般都要有防火处理。饭店的火灶上部的排风管除外，其一般用花铁皮板打造，很多时候火焰能烧到。

4. In case of exposure to high temperature and flammable environment, the air duct shall be generally provided with fire prevention treatment. Except for the exhaust pipe on the upper part of the hotel stove, it is usually made of painted iron sheet, and the flame can burn in many cases.

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