Movable closed liquid pumping device for liquid collecting tank

The utility model provides a movable closed liquid pumping device for a liquid collecting tank, and relates to the technical field of oil gas recovery. The device comprises a vacuum tank, the air inlet end of the diaphragm type manual pump is fixedly communicated with the top of the vacuum tank; the air outlet end of the diaphragm type manual pump is communicated with a liquid accumulation tank through the manual closed lifter, and the bottom of the vacuum tank is communicated with the liquid accumulation tank through the manual closed lifter; and the bottom of the vacuum tank discharges liquid into the ground tank through the nitrogen tank. On the whole, the device is simple in structure, easy to operate, low in improvement cost, flexible to use and free of site limitation, the liquid oil recovery difficulty and cost are effectively reduced, sealing in the using process can be guaranteed, and the accident risk is effectively reduced. 本实用新型提供了移动式集液罐密闭抽液装置，涉及油气回收技术领域。该装置包括真空罐；隔膜式手动泵，隔膜式手动泵的进气端固定连通在真空罐的顶部；手动密闭提