Continuous conveying system for statically metering materials

Abstract

The invention provides a continuous conveying system for statically metering materials. The continuous conveying system comprises a two-way conveying belt connected below the discharge end of an unloading conveying belt, a metering conveying unit A and a metering conveying unit B are correspondingly connected below the two ends of the two-way conveying belt, the metering conveying unit A and the metering conveying unit B each comprise a truss, weighing metering sensors are arranged between the trusses and racks, and the conveying belt is arranged on the trusses. According to the solution, in amaterial receiving process of the metering conveying unit B, the metering conveying unit A completes the metering weighing task and conveys the materials to the downstream, the conveying belt is vacated to wait for the next material receiving and weighing process, so that static accurate metering of the materials is completed, continuous work of the two-way conveying belt is guaranteed, and certainly, the continuous discharging process of the cabin materials is guaranteed.

Description

technical field [0001] The invention relates to metering and conveying in the process of continuous conveying of materials. Background technique [0002] The measurement method of large flow materials generally adopts continuous cumulative automatic weighing apparatus and discontinuous cumulative automatic weighing apparatus. The continuous cumulative automatic weighing instrument refers to the belt conveyor weighing scale, that is, the belt scale, the screw scale, the disc type measuring rotor scale and the reduction scale (or the weight loss scale). The continuous accumulative automatic weighing instrument is also called a dynamic weighing instrument. The material is measured during the continuous conveying process. It is based on the weight per unit length and the speed per unit time, and the cumulative measurement is carried out in the form of calculus. The collected data The weight deviation of the instantaneous unit length of the actual material running state is relat...

AI Technical Summary

Problems solved by technology

Due to the large fluctuations in the transportation flow, the belt conveyor belt is affected by the flow of powdery materials and the ambient temperature, and the belt tension changes greatly, resulting in the fluctuation of the two key technical parameters of the belt scale such as the weight signal and the speed signal under instantaneous conditions, which affects the belt scale. The measurement accuracy of the belt scale is high, and the calibration method of the belt scale in the daily use process adopts the chain code, the weight verification method has a large deviation compared with the actual measurement accuracy, the actual measurement accuracy is greater than 0.5%, and it is unstable

Although the belt scale is widely used, it cannot be accepted by the supply and demand parties as a powder material trade settlement. To realize the settlement of the belt conveyor powder material, a measurement system with a measurement accuracy of more than 0.2% accepted by the supply and demand parties must be selected.

[0004] A Chinese patent discloses a patent document titled "Bulk Cargo Terminal Online Continuous Static Metering and Conveying System and Conveying Technology" (CN103787097A), the technical problem to be solved is "calculating the measurement accuracy of the unloading volume through the change of the draft of the hull." low problem

If the static metering silo 1 is movable and the loading conveyor 2 is fixed, the weighing device and the vehicle-mounted hydraulic opening and closing mechanism of the static metering silo 1 will be displaced accordingly, and all the accessories will be moved together The direct consequence of displacement is the complexity of pipeline layout and guidance; on the contrary, if the static metering silo 1 is fixed and the loading conveyor 2 is displacement, it will appear how the loading conveyor 2 accepts the The connection problem of the incoming material of the first conveyor belt 3; the second is that the buffer silo 6 should be arranged correspondingly under the static metering silo 1. This scheme of arranging the silo up and down is really difficult because it needs to set up multi-layer work ( support) platform, occupies too high space height, and at the same time, the material will be transported to a high place, which will undoubtedly increase the equipment input and occupied space of the first conveyor belt 3; the third is that this prior art does not disclose the first In the process of continuous conveying of materials by the conveying belt 3, the specific plan of how the metering process of the static metering silo 1 is realized; , due to the moisture content, particle size and adhesion of the material, etc., may affect the discharge efficiency of the static metering silo 1, which will lead to difficulty in discharging or even blockage and failure to discharge the material, so the purpose of continuous conveying and metering is only an unattainable ideal

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