The train crane tube is well known to everyone. What impact does the train crane tube have on the electrostatic field in the storage tank?

　　 When charged oil is injected into the storage tank, the charge contained in it will form an electrostatic potential at the oil/gas interface. With the accumulation of electric charge in the tank, the potential continues to rise. When it exceeds a certain limit, a spark discharge will occur. If the discharge energy is large enough, it may ignite the explosive mixture in the tank and cause an explosion. After the oil filling is finished, it is generally not allowed to perform operations such as liquid level measurement, temperature measurement and sampling immediately.

　　 analyzed the influence of the train crane tube on the leakage rate of the electric charge in the storage tank and the oil surface potential. The train crane tube is equivalent to the grounding conductor on the symmetrical axis of the storage tank, and the analytical solution of the boundary value problem of the electrostatic field is deduced. Using the analytical solution, after analyzing the influence of the train crane tube on the charge leakage rate and the oil surface potential, the conclusion is that: the train crane tube cannot accelerate the charge leakage rate in the tank, but it can reduce the oil surface potential, the degree of influence and the shape of the tank It is related to the radius of the grounding conductor.