Coal crushing is an important part of the process of mineral processing. mineral sizers are the main mechanical equipment used to break up large blocks of coal. mineral sizers include drive unit, fixed tooth roller, movable tooth roller, bearing seat, pressing spring and hydraulic control unit. In order to meet the particle size requirements for subsequent operations, mineral sizers operate. Before Mineral Sizers operate, it is necessary to adjust the minimum gap between the movable roll and the fixed roll by controlling the hydraulic control device. During operation, when the movable roll is squeezed by coal, the bearing seats at both ends of the movable roll slide horizontally along the rails on the frame. The gap between the movable tooth roller and the fixed tooth roller keeps dynamic change, and the gap between the movable tooth roller and the fixed tooth roller can be kept in the specified range of values by pressing the spring, so as to meet the crushing requirements. But at present, when adjusting the minimum gap of the two tooth rollers, usually the staff needs to control the hydraulic regulating device at the same time, but also through the scale to observe whether the adjustment is in place, time-consuming and laborious, low work efficiency: After the mineral sizers operate for a long time, the compression spring is weak. As a result, under the extrusion of large coal, the clearance between the movable roll and the fixed roll exceeds the upper limit of the specified range. And when there is coal stuck on the track, it is difficult for the spring force to reset the movable tooth roll and make the movable tooth roll stay in a position beyond the upper limit of the specified range. Due to lack of timely detection, mineral sizers are in a failure state for a long time. They cannot effectively break the coal and cannot meet the production requirements. Resulting in a long crushing cycle, resulting in low dressing efficiency.
The mineral sizers with the movable tooth roll operation monitoring device designed by us aim to provide us with a way to speed up the adjustment of minimum gap, shorten the adjustment period and timely detect the failure of the movable tooth roll and timely stop processing to ensure the crushing efficiency and reduce the number of repeated crushing. mineral sizers with movable toothed roller operation monitoring device to enhance beneficiation efficiency. It is implemented by the following technical solution: mineral sizers with a movable roll operation monitoring device comprising the crusher main body, proximity switch and travel switch; On the crusher body of the movable tooth roller rail side of the crusher body, the mounting plate is fixed along the track length direction, the mounting plate along the track length direction is provided with a chute on the chute by the movable tooth roller to the crusher body of the fixed tooth roller direction sliding is provided with the proximity switch and the travel switch, A scale is fixed on the mounting plate along the track length direction; The bearing seat of the movable toothed roller can be disassembled connected with the travel switch activity contact with the dial block, the travel switch and acousto-visual alarm and power supply in series form a closed circuit: the proximity switch and the coil of the time relay and the power supply in series form a closed circuit, the time relay normally closed contact and the driving device and the power supply in series form a closed circuit.
Step by step, the bearing seat of the movable tooth roller is fixed on a slot parallel to the slide groove, the dial block is stuck in the slot. The advantages of this design: by touching the stroke switch through the dial block, the acousto-visual alarm issued an alarm, to ensure that the gap between the active tooth roller and the fixed tooth roller is the minimum gap required, in order to speed up the minimum gap adjustment speed, shorten the adjustment cycle: When the pressing spring is weak and mineral sizers movable roll is kept in the position where the gap between the movable roll and the fixed roll exceeds the upper limit of the specified range, the proximity switch is triggered and the normally closed contact of the control time relay is disconnected, thus stopping the driving device and realizing timely shutdown. Reduce the number of repeated crushing, shorten the crushing cycle, improve the dressing efficiency.