Method for reducing initial pressure of bottom of large material bin

Abstract

The invention discloses a method for reducing the initial pressure of the bottom of a large material bin. The material bin, a material bin fixing device, a connecting device, a feeding device, a reinforcing bracket and lifting devices are included. A gap between the material bin and the feeding device is connected through the connecting device, the connecting device plays a role in material blocking and sealing, and material leakage and dust overflow are prevented. The material bin is fixed to the ground through the material bin fixing device, the feeding device is located below the material bin and used for conveying materials, and the lifting devices are installed below the reinforcing bracket and used for supporting the feeding device. By means of the lifting devices, the feeding device can rise or fall by a certain height. When the materials are contained in the material bin and the feeding device is ready to start to convey the materials, the lifting devices fall from the high position point by 20-120 mm. At the moment, the structure of a material force chain in the material bin is changed, the bin pressure is reduced, and the torque provided by a motor required for restarting the feeding device is reduced. When the materials in the material bin are completely discharged, the lifting devices rise and reset to the high position point.

Description

technical field [0001] The invention relates to the field of silo preparation, in particular to a method for reducing the initial pressure at the bottom of a large silo. Background technique [0002] Conical or inverted trapezoidal silos are widely used in coal, metallurgy, chemical, grain and other industries for material storage, transfer and shipment, and the bottom of the silo usually uses feeding equipment to realize material transfer. [0003] When the design of the outflow orifice of the silo is small enough to a certain critical value, arching and blockage of the discharge hole will occur, and even due to the moment of arching, the stress of the particle group in the silo and the friction force distribution of the particles against the silo wall will change abruptly , It is easy to cause the vibration and buckling of the warehouse wall, resulting in the collapse of the overall structure and causing huge losses. Therefore, in order to make the material flow smoothly ...

AI Technical Summary

Problems solved by technology

After starting the power, the power is reduced to about 50% of the rated power during normal operation, which causes the phenomenon of "big horse-drawn cart", the output mechanical power cannot be fully utilized, and the power factor and efficiency are not high, which is not only unfavorable to users and the grid. It will also cause waste of electric energy and increase unnecessary manufacturing costs

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