MBR (Membrane Bioreactor) membrane device with U-shaped pipe not easy to loosen

The utility model discloses an MBR (Membrane Biological Reactor) membrane device with uneasy-to-loosen U-shaped pipes, which comprises a support frame, the support frame comprises four upright posts, a top square frame and a bottom square frame, the top square frame and the bottom square frame are connected with the four upright posts, the support frame is provided with a plurality of curtain type membranes which are arranged in parallel, and the curtain type membranes are arranged at intervals through bumps arranged on the top square frame and the bottom square frame. Membrane water outlets are formed in two side walls, extending out of the top of the supporting frame, of the curtain type membrane; a water collecting frame is arranged at the top of the supporting frame, supporting rods are arranged at the bottom of a water collecting pipe, and an aeration assembly fixed to stand columns is arranged below the bottom square frame; a limiting rod is arranged on the outer side of the U-shaped pipe, a lead screw