Device for replacing water gap

The invention relates to a device for replacing a water gap, which comprises a frame and a pushing device, the pushing device comprises a limiting part and a pushing part which are connected together, and the limiting part can enable the pushing device to stop pushing the water gap to move when the water gap reaches a preset position; a positioning device is arranged on the frame, the moving device comprises a body, a first protruding part and a second protruding part are arranged on the two sides of the body respectively, the first protruding part is arranged on the side close to the guiding device, and when the water gap moves to the positioning device along the guiding device, the water gap pushes the first protruding part and drives the moving device to move. The moving device is arranged on the frame, and the first protruding part of the moving device can be pushed when the water gap moves to the preset position, so that the second protruding part is driven to block the pushing device. Due to the fact th