Quick dismounting and overhauling device for closed cooling tower

The utility model discloses a closed cooling tower rapid disassembly and assembly maintenance device which comprises a box body and a cooling tube bundle, a disassembly and assembly opening is formed in the top end of the box body, a coil pipe fixing frame is arranged in an inner cavity of the box body and arranged below the disassembly and assembly opening, and the cooling tube bundle is connected to the coil pipe fixing frame. A mounting opening is formed in the vertical side wall of the box body, the sliding panel is inserted into the mounting opening in a sliding mode, the two ends of the cooling pipe bundle are each communicated with a connecting box, the two connecting boxes are arranged in the box body, and one pipe bundle connecting pipe is communicated with each connecting box; two connecting through holes are formed in the sliding panel, the two tube bundle connecting pipes correspond to the two connecting through holes in a one-to-one mode, and the tube bundle connecting pipes penetrate through the