Can you see a fire engine that can be called for rain? Anyway Xiaobian has never seen or heard of it. I heard that the first high-power positive and negative pressure smoke exhaust vehicle in Fujian Province has officially settled in Xiamen. It is called a fire truck capable of exchanging wind and rain. It will be officially commissioned by the Special Service 2 Squadron of the Fire Services Detachment in Xiamen City soon. Just look at the name and be particularly curious. Bring our curiosity together to understand this mysterious species.
Through the positive and negative pressure exhaust, both air and smoke can be discharged
The biggest feature of this fire truck is that it can smoke and it can also send air. What does this "positive and negative" mean? The positive and negative pressure exhaust fire truck adopts an innovative technology of automatic commutation. It can use any one of the positive and negative pressures of individual air ducts to switch freely. At the fire site, it is possible to convert the positive pressure and negative pressure smoke at the same time or separately. This means that the smoke evacuation truck can choose to use the air supply or smoke according to the site conditions and the wind direction and geographical location.
Seemingly inconspicuous things, but the role is particularly large, through the positive and negative ducts a simple suction and delivery, can effectively eliminate the smoke in the fire, to provide more breathing space for trapped people. This will also help fire officers and soldiers on-site rescue, dilute the smoke to improve the efficiency of the rescue. When the positive pressure air supply and the negative pressure air discharge are opened at the same time, the replacement of smoke and outside air in the fire field can be accelerated.
The rectangular wind blows out the wind and calls "rain"
In order to maximize the positive and negative exhaust functions, fire engines have changed the traditional circular smoke exhaust mode, using a rectangular modular smoke exhaust device. At first glance, they are similar to missile launchers, and can also achieve 360 ​​degrees. Infinite rotation and a pitch of -5 degrees to 45 degrees to maximize the adaptability to fire conditions. The two exhaust pipes protruding at both ends of the car body form A and B ports, and they are connected to the fans to perform the work of exhausting and delivering air.
This fire truck not only can effectively discharge smoke, but also can spray water. When a small fire occurs, this type of fire sprinkler can directly use the fire. However, this is not the most important thing. The main function of the water spray device is to remove and disperse poisonous and harmful gases through the water mist so as to avoid secondary pollution to the environment.
External hose crack space restrictions
Like this large-scale fire engine, it is very difficult to go into some narrow lanes. Although its functional configuration is very complete and its operating efficiency is very high, in some places, vehicles cannot enter, which greatly limits the effect of smoke exhaust. With this car equipped with smoke exhaust hose, the above problems will be solved. The exhaust hose is connected with the exhaust pipe of the vehicle, and can be laid several hundred meters like a water hose, so that the exhaust operation in a narrow space can be realized, and the problem that the vehicle cannot be accessed due to the space limitation is greatly solved.
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