At present, for coal washing plants and raw coal or coal gangue in shafts under 2000 tons, traditional non-adjustable mineral sizers often face the problem of insufficient production or large size models, resulting in insufficient installation space or substantial increase in cost. The existing adjustable crusher due to the small adjustment range, can not meet the material changes caused by the discharge can not meet customer demand or insufficient production phenomenon, market variability can not flexibly respond to the lack of competitive advantages, resulting in high input costs, limited installation space, poor site applicability, insufficient production and other shortcomings, Therefore, it greatly restricts the rapid development of coal preparation plant in the market demand. 1 Medium and large integral adjustable center distance mineral sizers, which are characterized by: The medium and large integral adjustable center distance mineral sizers comprises a power unit, a bearing support unit, a fixed tooth roll unit, a moving tooth roll unit, a hydraulic device and an integral detachable bottom support, and the fixed tooth roll unit, a moving tooth roll unit, a hydraulic device and an integral detachable bottom support are connected as one. The distance between the fixed tooth roll unit and the moving tooth roll unit is adjusted by pulling or pushing the moving tooth roll unit through a hydraulic device. 2. Medium and large integral adjustable center distance mineral sizers are characterized in that the power unit comprises a motor, a hydraulic coupling, a reducer, a motor support and a drum type gear coupling, and the motor and the reducer are respectively connected with the motor support by high-strength bolts.
3. Medium and large integral adjustable center distance mineral sizers are characterized in that the bearing support unit comprises a fixed bearing support and a mobile bearing support, and the fixed bearing support comprises a fixed inner joint surface, a motor support connection block, a fixed bearing support body, a guide shaft mounting hole, a connecting plate mounting hole, a bottom support mounting surface and a left tooth roller bearing mounting hole: The moving bearing support comprises a moving inner combination surface, a motor support connection block, a moving bearing support body, a guide shaft mounting hole, a connecting plate mounting hole, a bottom support mounting surface and a right tooth roller bearing mounting hole.

4. Medium and large integral adjustable center distance mineral sizers, which are characterized in that the fixed tooth roller unit comprises a left tooth roller, a fixed bearing support at both ends, a connecting plate and a power unit, the power unit is connected with a fixed bearing support at one end by bolts, the left tooth roller is connected with a fixed bearing support at both ends: The moving tooth roller unit comprises a right tooth roller, a moving bearing support at both ends, a connecting plate and a power unit, and the power unit is connected with the moving bearing support at one end by bolts, and the right tooth roller is connected with the moving bearing support at both ends.