1. Inlet water quality, grid flow and grid position;
2. Depth, width and speed of grid well;
3. The material and type of the installation angle and slag discharge height grating can be determined according to the water quality and water inlet depth. The width of the grid can be calculated according to the flow, the speed through the grid and the installation angle, and the gap between the grid bars can be determined according to the use position of the grid.
4. Key points of construction and installation:
A. Dominant items:
(1) The grating dirt remover shall be firmly installed on the foundation;
(2) The symmetry center of grid bar and guide rail shall meet the requirements; The longitudinal plane of the grid bar shall be parallel to the side of the guide rail;
(3) The engagement between the rake teeth and the grid bars shall be free of jamming, the clearance shall not be greater than 0.5mm, and the engagement depth shall not be less than 35mm;
(4) The operation position of the power grid shall be correct without jamming and sudden tripping. The overload device shall be sensitive and reliable, and the garbage on the grid shall not be returned to the canal;
(5) The installation of other types of trash removers shall meet the design requirements
