Water drainage device in chilled water storage system

The utility model provides a water drainage device in a chilled water storage system, and belongs to the field of energy storage. The chilled water storage device comprises a cold storage pool. The water drainage device comprises a shell. The top end of the shell is a water inlet end. First water passing holes are formed in the bottom end of the shell. The bottom end of the shell is communicated with the cold storage pool. A pressure relief device is arranged in the lower portion of the water inlet end and is composed of a pressure relief cylinder. A plurality of second water passing holes are formed in the side wall of the pressure relief cylinder. The opening end of the pressure relief cylinder is fixedly connected with right the lower portion of the inlet end. A flow guiding device is arranged below the pressure relief cylinder and comprises a plurality of bent pipes, a first flow guiding plate and a second flow guiding plate, wherein the first flow guiding plate is fixedly connected to the openings in the upper ends of the bent pipes, the second flow guiding plate is fixedly connected with the openings in the lower ends of the bent pipes, the bent pipes are wave-shaped pipes with crests and troughs, the two ends of each bent pipe are communicated, both the first flow guiding plate and the second flow guiding plate are fixedly connected to the inner wall of the shell, and the portion between the second flow guiding plate and the bottom wall of the shell is filled with sponge. The water drainage device is good in water draining effect, ingenious in structural design and even and slow in water drainage.