Drainage mechanism for preventing water accumulation of upper filter cloth

An upper guide roller is rotatably mounted at the top end between side plates, leakage-proof plates are welded to the two sides of a top plate, sponge barrier strips adhere to the bottom ends of the leakage-proof plates, a middle roller is rotatably mounted at the bottom end of a middle plate, an air outlet is formed in the bottom end of a pressurizing box, and connecting plates are welded to the two ends of the middle plate and the two ends of the pressurizing box respectively. The filter cloth is guided to the position between the two leakage-proof plates, the connecting plate is pressed, the middle plate moves downwards, the filter cloth is tightened, the filter cloth is close to the bottom ends of the pressurizing boxes, the pressurizing boxes are connected to the two ends of the middle pipe respectively, the two ends of the middle pipe are connected with air pumps through hoses respectively, a water outlet is formed in the bottom end of the side plate, and the recycling and cleaning assembly is installed