The reinforcement of ventilation pipe can ensure the stability of internal static pressure of the ventilation pipe in practical application. If the pipe wall has 1% deflection, the reinforcement of the ventilation pipe is needed. In the actual process of strengthening the ventilation pipe, it is necessary to select the corresponding reinforcement methods according to the pressure and size. The selection of reinforcement methods plays a decisive role in the service life of the final ventilation pipe. Generally, the following methods can be used to carry out the reinforcement.

種、拉桿加固

First, tie rod reinforcement

在此過程中需要使用鋼彩、套管等材料展開加固，需要在500pa以下對其展開正壓加固。

In this process, steel color, casing and other materials need to be used for reinforcement, and positive pressure reinforcement should be carried out under 500 PA.

第二種、框架加固法

Second, frame reinforcement method

該種加固方式可以使用輕鋼龍骨展開加固。

The light steel keel can be used for reinforcement.

第三種、抱合加固法

The third one is consolidation method

其中使用的材料也是輕鋼龍骨，通常應用在較為特殊的管道加固中，其中主要包括在900彎管道、三通管以及悶頭管等。

The material used is also light steel keel, which is usually used in more special pipe reinforcement, including 900 bend pipe, tee pipe and bulkhead pipe.

由此可以看出，在通風管道加固施工的過程中，需要根據管道的位置、實際使用情況等方面內容展開加固。除此之外，還可以采用防下垂加固法，這種方式主要對特殊管道展開加固，其中主要包括迂回管道以及變經管道等，避免通風管道在實際應用過程中出現位移以及下垂等情況。

It can be seen that in the process of strengthening construction of ventilation pipe, reinforcement should be carried out according to the location of the pipe, the actual use and other aspects. In addition, anti sagging reinforcement method can also be used, which is mainly used to reinforce special pipelines, including detour pipelines and transition pipelines, so as to avoid displacement and sagging of ventilation pipelines in the actual application process.