Deep slot type flip bucket free of water accumulation

The invention discloses a deep slot type flip bucket free of water accumulation. The deep slot type flip bucket comprises a deep slot, a reverse arc flip bucket body and a front-segment discharge chute. The deep slot is located at the horizontal height the same as that of the front-segment discharge chute or inclines downwards. The reverse arc flip bucket body is an upwarp curved surface with the radius being R. Side walls are erected on the inner side and the outer side of the deep slot and the inner side and the outer side of the reverse arc flip bucket body, and the length L1 of the side wall erected on the outer side of the deep slot is equal to the length L2 of the side wall erected on the outer side of the reverse arc flip bucket body. The starting point of the deep slot and the starting point of the reverse arc flip bucket body are both located on an AB section, the initial width and the tail end width of the deep slot are a1 and a2 correspondingly, and the initial width and the tail end width of the r