A bulk material flow measuring device

Abstract

A scattered material flow measurement device includes a machine barrel; the machine barrel is a vertical barrel having a polygonal cross section; a feeding opening which is connected to a discharging opening of a material bin and extends in the upper side direction is arranged on the upper part of the barrel, and a discharging opening is formed in the lower end of the barrel; a cone-shaped spiral body is hanged in a vertical chamber of the machine barrel through a bearing arranged above a top surface of the machine barrel; an upper end of a core shaft of the cone-shaped spiral body is connected to a photoelectric rotary encoder through a flexible coupling; the coned spiral body includes two pitch-equal diameter-variable spiral blades which are symmetrically welded on the core shaft; and each blade winds the core shaft half a round, a surface bus of each spiral blade is a linear positive spiral surface perpendicular to an axis, each spiral blade is of a structure the width of which is increasing gradually from top to bottom, and a half pitch of each spiral blade is equal to the lowest diameter of the blade.

Description

technical field [0001] The invention relates to a bulk material (bulk material, bulk) flow metering device, which is used for continuously measuring the flow rate and measuring the total amount of the bulk material during the flow process of the bulk material. It belongs to the technical field of bulk material measurement. Background technique [0002] During the processing, transportation and batching of bulk materials (bulk materials), it is often necessary to continuously measure the flowing materials. According to the filling state of the material in the pipeline, it can be divided into two forms: full pipe flow and non-full pipe flow. like figure 1 As shown, the flow from the outlet of the silo to the throttle gate is full pipe flow, and the flow after the throttle gate is partly full pipe flow. It is relatively easy to realize the measurement of materials under the flow state of a partially filled pipe. At present, equipment such as punching plate flowmeters, nuclea...

AI Technical Summary

Problems solved by technology

However, this device has the following problems: ①If there are flexible impurities such as rope ends and cloth pieces in the material, they will be entangled on the blades; The flow velocity of each point above is not exactly the same, which affects the measurement accuracy; ③ If the material flows in a circular pipe (not mentioned in the patent), some unknown factors will cause the material to rotate around the axis of the pipe, which directly affects the measurement result ;④The bearing supporting the blade is surrounded by the material, and the long-term operation will increase the resistance or even stop due to the infiltration of dust, making the measurement invalid

The above problems have an impact on the measurement accuracy and reliability of the device, and are also one of the factors that have not been popularized and applied so far.

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