Heat preservation gear pump

The utility model provides a heat preservation gear pump, and relates to the technical field of pump valves. Comprising a flange plate, a gear pump lower cover arranged above the flange plate, a driving wheel shaft penetrating through the flange plate and the gear pump lower cover, a driving gear arranged at one end of the driving wheel shaft and above the gear pump lower cover, a driven gear meshed with the driving gear, and a driven wheel shaft penetrating through the driven gear, the gear pump further comprises a second O-shaped ring, a liquid cavity, a first O-shaped ring and a gear pump upper cover which are sequentially arranged from bottom to top, the second O-shaped ring and the first O-shaped ring are embedded in the two side faces of the liquid cavity respectively, a liquid cavity is formed in the liquid cavity, and the driving gear and the driven gear are both arranged in the liquid cavity. A liquid driving structure and a heating runner structure are arranged between the gear pump upper cover and