Screw feeder is a new generation product integrating steady flow conveying, weighing and quantitative control of powder materials; It is suitable for continuous metering and batching of powder materials in various industrial production environments; A number of advanced technologies are adopted, with reliable operation and high control precision; It is especially suitable for continuous metering and batching of powder materials in building materials, metallurgy, electric power, chemical industry and other industries.
The screw feeder detects the weight of the passing materials through the weighing bridge to determine the weight of the materials on the belt. The digital speed sensor installed at the tail continuously measures the running speed of the feeder. The pulse output of the speed sensor is directly proportional to the speed of the feeder. The speed signal and weight signal are sent to the feeder controller together, The microprocessor in the controller generates and displays the cumulative metering / instantaneous flow. The flow is compared with the set flow. The output signal of the control instrument controls the frequency converter to change the driving speed of the feeder, so that the material flow on the feeder changes, approaches and remains at the set feeding flow, so as to realize the requirements of quantitative feeding.
According to the requirements of the service environment, the screw feeder can be divided into two series: single tube screw feeder and U-type LS screw feeder.
The single tube screw feeder adopts closed conveying of materials,has good sealing, can avoid dust pollution to the environment, improve working conditions, has stable feeding, can realize air lock, and can also eliminate the backflow of materials, The single tube spiral feeder can also be designed into horizontal conveying, inclined conveying and vertical conveying according to the use requirements, which can reduce the manufacturing cost of the equipment.
The drive end bearing and tail bearing of the screw feeder are placed outside the chute shell, which reduces the influence of dust on the bearing and improves the service life of the key parts of the screw feeder. The hanging bearing in the middle of the screw feeder adopts sliding bearing and is equipped with dust-proof sealing device.
The sealing element of the screw feeder is nylon or plastic, so it has good sealing performance, strong wear resistance, small resistance and long service life. The bearing bush of sliding bearing of screw feeder includes powder metallurgy, nylon and Babbitt alloy, which can be selected according to different needs. The flexible arrangement of inlet and outlet of screw feeder makes it more adaptable and recognized by users. Screw feeder is usually composed of driving device, head section, middle section, tail section, head and tail bearing, feeding and discharging device, etc. if conditions permit, place the driving device at the discharge end. Because the driving device and discharge port are more reasonable when installed at the head section (assembled with thrust bearing), the screw can be in tension state. Each part of the head section, middle section and tail section has several different lengths. The arrangement order of each screw section of screw conveyor shall follow the principle of orderly arranging according to the length of screw section and arranging screw sections of the same specification together. During installation, it shall be carried out in sequence from the head. During the general layout of the screw feeder, it shall also be noted that the base and discharge port shall not be arranged at the flange of the casing joint, and the feed port shall not be arranged above the lifting bearing.
1. The screw shaft is connected with the lifting bearing, head and tail shaft with embedded tongue, which does not need axial movement for installation and disassembly, and is convenient for maintenance. Long mandrel, less hanging and fewer fault points.
2. The variable diameter structure is adopted to increase the volume of the lifting bearing, avoid the contact between the lifting bearing and materials, and the service life of the lifting bearing can reach more than two years.
3. Each transmission part adopts floating connection mode. The lifting bearing is a universal joint structure, so that the spiral body, lifting bearing and tail assembly form an integral rotating floating body, which can rotate freely with the conveying resistance within a certain range, without jamming and blocking.
4. The head and tail bearing seats are outside the shell. All bearings adopt multi-layer sealing and matching sealing technology, with long service life.
5. Compared with other conveying equipment, screw feeder has the advantages of small section size, good sealing performance, stable and reliable operation, multi-point loading and unloading in the middle, simple operation and maintenance.
1. It is specially used for the measurement and control of powdery materials.
2. The feeding screw has a unique steady flow structure. The feed powder sinks evenly on the whole feed inlet section, which is not easy to arch and flush.
3. Cycloid needle wheel reduction motor ensures long-term stable operation.
4. The flow stabilizing screw adopts variable pitch structure and outlet overflow mode, which effectively solves the problem of material flushing (double pipe flow stabilizing is adopted for output > 60t / h).
5. The measuring screw scale adopts the direct weighing structure of three high-precision sensors (tension), which successfully solves the error caused by lever weighing and greatly improves the measuring accuracy.
6. Digital acquisition module is adopted, and the effective resolution is up to 1 million; Acquisition rate: 50 times / S; The annual drift is less than 50ppm; The temperature drift is less than 50ppm.
7. Sealed structure to reduce dust emission.
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