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为了保证在临时失去动力的情况下也能付油,就必须做到部分自流付油。要实现自流付油,油品就必须有一定的液面高度,也就是要求储存油品液面与发油鹤管出口具有足够的高度差。这个高度差取决于流量、管道及管件的阻力。以冯村油库扩建2×3000m~3内浮顶罐及付油系统为例,建立自流发油系统模型,给出液面与鹤管出口高度差的计算公式。通过计算,得出最小工作高度。指出速度水头对同一液面高度的实际流量的影响及不同液面高度下的自流发油流量。通过分析研究得知,如果一满罐油在保证流量表准确的情况下,全部实现自流发油,可付油品量占全部油品的79％,既可节约电能,又可在临时失去动力的情况下不影响正常发油。
In order to ensure that in the case of temporary loss of motivation can also pay the oil, we must do part of the gravity oil. To achieve gravity oil, the oil must have a certain liquid level, which is required to store the oil level and the hairpin exports have a sufficient height difference. The height difference depends on the flow, pipe and tube resistance. Take the Fengcun oil tank expansion 2 × 3000m ~ 3 floating roof tank and pay oil system as an example, a model of gravity flow oil system is established, and the formula for calculating the height difference between liquid level and crane outlet is given. Calculated to reach the minimum working height. The effect of velocity head on the actual flow at the same liquid level and the gravity flow at different liquid levels are pointed out. Through the analysis and study that if a full tank of oil in the flow meter to ensure accurate circumstances, the total realization of gravity oil, oil can be accounted for 79% of the total oil, both to save energy, but also in the temporary loss of motivation The case does not affect the normal hair oil.