Hopper scales are used for weighing product streams for packaging, dosing, dispensing and yield monitoring in batches. The unit consists of a hopper, weighing cell and weighing instrument. It is an ideal automatic weighing device for the modernization of bulk materials, mainly divided into totalizing hopper scales and loss-in-weight feeding scales.
020-34563445Hopper scale mainly consists of upper hopper part, hopper weighing part, lower hopper part, automatic calibration device, scale support, weighing control system and computerized management system. The upper hopper part of the scale consists of storage hopper, feed gate, material leveler and so on. The hopper is used for temporary storage of materials when the hopper weigher is accumulating and discharging materials. The hopper weighing section consists of the hopper weighing body, discharge gate, weighing module and so on. This part, together with the weighing control part, forms the basic measuring unit of the bulk material scale. The lower hopper of the scale consists of a discharge hopper and a material leveler. The unloading hopper accepts the material weighed in the hopper and empties the material gradually. The automatic calibration device is used to meet the needs of installation and commissioning, weighing setting and usual calibration. The dosing control system is mainly composed of weighing module, weighing control cabinet, material leveler and other parts, controlling the action of non-continuous cumulative automatic hopper scales, is the whole bulk material weighing measurement of the center. The computer management system is installed in the control room, which is responsible for collecting the weight data of the control system, comprehensively monitoring the work of the system, and can program the PLC and modify the weighing control parameters through the window software.
Judgment process: when the hopper is called empty, close the smell door at the upper hopper, the hopper will be automatically cleared to zero, and the material conveyed by the screw machine will enter the upper hopper; Feeding process: close the gate at the hopper, open the smell door at the upper hopper, the material will enter the hopper from the upper hopper into the hopper weighing, and then enter into the feeding section; Weighing process: when reaching the required weight of each weighing scale, close the smell door of the upper hopper to carry out the weighing measurement and the value of the weighing scale will be automatically stored and accumulated: Discharging process; Discharging process. The weight value of the scale is automatically stored and totalized: Discharging process; after the measurement is finished, the smelling door at the hopper weighing is opened, and the materials are discharged into the lower hopper of the scale.
Judgment process: when the hopper weigher is finished discharging the material, the gate at the hopper weigher closes, the hopper weigher is automatically cleared to zero, and enters the next weighing cycle. Throughout the measurement process, there is no gate at the lower hopper of the scale, and the material is always continuously and stably fed to the screw machine, and the feeding screw machine on the upper hopper of the scale is also continuously and stably operated at all times. According to the gate closing and opening of the upper hopper and hopper weighing and the stabilization time required by the hopper weighing, it realizes the static measurement and meets the requirement of continuous conveying at the same time.
Technical Parameters
Weighing range: 0-300t/h
Weighing Error: ±0.2%
Weighing sensor 3～4pcs
Instrumentation power supply: 220V 85%～110%50HZ ±2%
Use of environment: scale body: -10 ℃ ~ 50 ℃, instrumentation: -10 ℃ ~ 45 ℃
Relative humidity: not more than 90%.
