When it comes to large-scale concrete mixer, we should be familiar with the fuel tank. As long as the vehicles that need fuel oil have fuel tank, the mixer truck in the special vehicle is no exception. In order to prevent the fuel in the tank from splashing out due to vibration, the loss of fuel vapor and the entry of external dust, the fuel tank is covered and sealed. But did you find that there is a small air hole on the fuel tank What is the function of this pore? What will happen if there are no air holes on the oil tank of large concrete mixer? The closed fuel tank will form a certain vacuum degree due to the consumption of fuel, resulting in the loss of oil suction capacity of the oil pump; when the temperature in the tank is high, fuel volatilization will increase the pressure inside the tank, resulting in air pressure imbalance.
1. 装置在油箱盖内置阀门上：它能够按照主动开闭，均衡表里气压。
1. Installed on the built-in valve of the oil tank cover: it can open and close automatically to balance the internal and external air pressure.
2. 装置在油箱钥匙孔阀门上：这类在老车型上比拟罕见。
2. Installed on the valve of the fuel tank key hole: this kind of valve is more common on old models.
3. 油箱外置通气孔：此刻的商用车大多都是在油箱顶部预留通气孔，便于吹气查抄，比方打鱼注册送分
、随车吊等等。以是若是你的公用车油箱盖上带有透气孔，一旦油箱盖丧失切勿随便封死油箱口，而轻忽了通气性。曾有个卡友在给车辆放油的时辰，健忘翻开加油口，致使油箱吸瘪，这便是实在的经验，但愿列位引发正视。
3. Air vent outside the fuel tank: most commercial vehicles now reserve air vent at the top of the fuel tank for air blowing inspection, such as concrete mixer truck, truck mounted crane, etc. Therefore, if you have a vent on the fuel tank cap of your special vehicle, once the fuel tank cap is lost, do not seal the fuel tank opening at will, ignoring the ventilation. There was a friend who forgot to open the fuel port when he was discharging fuel to the vehicle, which eventually led to the fuel tank deflating. This is a real lesson. I hope you will pay attention to it.
大型混凝土搅拌机，油箱透气孔梗塞不只会致使油箱吸瘪，还会致使油泵没法抽取燃油，进而呈现熄火、能源缺乏或热机状况启动坚苦等景象，严峻时还会致使油箱变形分裂，致使燃油泄露或火警爆炸等风险。
In large-scale concrete mixer, the blockage of the vent hole of the oil tank will not only lead to the shrinkage of the oil tank, but also lead to the failure of the oil pump to extract fuel oil, and then the phenomenon of flameout, insufficient power or difficult start-up under hot engine condition will occur. In serious cases, the tank will deform and crack, leading to fuel leakage or fire and explosion.
大型混凝土搅拌机如何防备油箱透气孔梗塞：
How to prevent the air hole of oil tank from clogging for large concrete mixer:
1. 常常查抄透气孔，防患于已然。
1. Check the air vent frequently to prevent accidents.
2. 在加油时寄望油箱盖开启时的气流声，一种是出气声，这类声响是一般的，另外一种是吸气声，此时要注重，这能够是油箱内的压力低于内部压力，油箱透气孔有能够是梗塞了。
2. Pay attention to the air flow sound when the fuel tank cap is opened. One is the air out sound, which is normal, and the other is the suction sound. At this time, it should be noted that the pressure in the fuel tank is lower than the external pressure, and the vent hole of the oil tank may be blocked.
3. 对铁质的透气孔，最好用纱窗包一下，若是是透气孔是塑料软管，那就将其口朝下，如许能够防止梗塞。
3. For iron vent, it is better to wrap it with screen. If the vent is a plastic hose, its mouth should face down, so as to avoid blockage.