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Ventilation duct is a product made for air circulation. Its characteristics and advantages are to achieve ventilation and enhance air circulation. Its material selection is generally made of profiles or plates. Here are the links and precautions:

1、插條式連接：主要用于矩形風管連接，它是將不同形式的插條插入風管兩端，然后壓實即可。

1. Insert connection: it is mainly used for rectangular air duct connection. It is to insert different forms of inserts into both ends of the air duct and then compact it.

河南通風管道

Henan ventilation duct

2、插接式連接：主要用于矩形或圓形風管連接，首先制作連接管，然后插入兩側風管，后再用拉鉚釘將其緊密固定。

2. Plug in connection: it is mainly used for the connection of rectangular or circular air ducts. First make the connecting pipes, then insert the air ducts on both sides, and then fix them tightly with pull rivets.

3、軟管式連接：主要用于風管與部件的相連，安裝的時候，軟管兩端套在連接的管外，然后用特別軟卡把軟管箍緊。

3. Hose connection: it is mainly used to connect the air duct and components. During installation, both ends of the hose are sleeved outside the connected pipe, and then the hose is clamped tightly with a special soft clamp.

4、抱箍式連接：主要用于鋼板的圓通風管道和河南螺旋風管連接，先把每一管段的兩端軋出鼓筋，并使其一端縮為小口，安裝時按氣流方向把小口插人大口，外面用鋼制抱箍將兩個端的鼓箍抱緊連接，后用螺栓穿在環中間固定擰緊。

4. Hoop connection: it is mainly used for the connection between the round air duct of steel plate and Henan spiral air duct. Firstly, roll out the drum reinforcement at both ends of each pipe section and shrink one end into a small opening. During installation, insert the small opening into the large opening according to the air flow direction. The drum hoops at both ends are tightly connected with steel hoops outside, and then threaded in the middle of the ring with bolts.

通風管道注意事項

Precautions for ventilation duct

1）對于比較復雜的民用建筑，在設計階段，各工種（暖通、給水排水，供電照明與建筑）首先應協商好空間分隔，定出每種河南通風管道的標高范圍。一般情況下不得越出給自己規定的界限。遇有個別管段要越界時應與其他工程協商。

1) For more complex civil buildings, in the design stage, various types of work (HVAC, water supply and drainage, power supply, lighting and Architecture) should first negotiate the space separation and determine the elevation range of each kind of Henan ventilation pipeline. In general, you should not go beyond the limits set for yourself. In case of crossing the boundary of an individual pipe section, it shall negotiate with other projects.

通風管道通安裝制作

Installation and fabrication of ventilation duct

2）解決各種通風管道道相碰及協調的原則，一般為：“小管讓大管，有壓讓無壓”。例如，自來水管與通風管道相撞，則應當自來水管拐彎。冷、熱水管與下水管相碰，則應改變冷、熱水管道。

2) The principle to solve the collision and coordination of various ventilation ducts is generally as follows: "small pipe gives way to large pipe, pressure gives way to no pressure". For example, if the water pipe collides with the ventilation pipe, the water pipe should turn. If the cold and hot water pipes collide with the downpipe, the cold and hot water pipes shall be changed.

3）施工前應設備總管的工程師，將各工種的管線，單線畫在一張平面圖上。每種管道用一種彩色筆。在各交點處綜合其標高，看是否有矛盾之處，及時發現，將問題解決在安裝之前。

3) Before construction, the engineer of the equipment main pipe shall draw the pipeline and single line of each type of work on a plan. Use a color pen for each type of pipe. Synthesize the elevation at each intersection to see if there is any contradiction, find it in time and solve the problem before installation.

4）為了減少投資，節省空間，降低層高，有些敷設無坡度要求的管道，可以穿梁敷設（如自來水管道，消防噴灑干管等）。

4) In order to reduce investment, save space and reduce floor height, some pipelines without slope requirements can be laid through beams (such as tap water pipeline, fire spraying main pipe, etc.).

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