Low-temperature liquid storage tank with self-pressurization device

The utility model discloses a low-temperature liquid storage tank with a self-pressurization device. The low-temperature liquid storage tank comprises an outer cylinder, an inner cylinder and a skirt, the inner cylinder is connected with a liquid inlet assembly, a self-pressurization device and a measurement and control assembly; the liquid inlet assembly comprises an upper liquid inlet pipe connected with the top of the inner cylinder, a lower liquid inlet pipe connected with the bottom of the inner cylinder and a communicating pipe used for collecting the upper liquid inlet pipe and the lower liquid inlet pipe. The communicating structure comprises an external pipeline connected with the communicating pipe and a metal hose used for connecting the external pipeline with the external tank car. The utility model provides a double-channel liquid inlet assembly and a method of a self-pressurization device arranged outside, so that the self-pressurization requirement under a relatively large gas demand amount is