Self-control type heating device of railway heat-preserving tank car

The utility model provides a self-control type heating device of a railway heat-preserving tank car, and relates to a railway tank car with a heat-preserving structure. The self-control type heating device comprises a steam heating sleeve and a steam heating control system, wherein the steam heating sleeve is arranged on the outer surface of a tank body of the railway heat-preserving tank car and comprises a steam heating cover and a steam distribution groove of a groove-type structure with upper holes and lower holes, the steam distribution groove is distributed in the longitudinal direction along the tank body, is welded to the inner wall of the steam heating cover and is not in contact with the tank body, and the steam heating control system is provided with a steam pipe leading to the steam distribution groove. The self-control type heating device has the advantages that the inner wall of the heating sleeve is provided with the steam distribution groove, so that fast distribution of steam in the heating sleeve is facilitated, the partial temperature is prevented from being too high, uniform heating is facilitated, heating efficiency is improved, unloading can be finished without the need of heating or through slight heating according to weather conditions, unloading time is saved, and the railway transportation problem of normal-temperature fine chemical raw materials easy to solidify in the prior art is solved.