Test method and device measuring silo bulk material pressure and sidewall frictional force

A test method and technology of a test device, which are applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve the problem that there is no technology and method for directly measuring the friction force of the side wall, and it is impossible to truly reveal the bottom pressure distribution, etc. question

Pending Publication Date: 2017-07-11
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing codes provide the calculation methods for the bottom pressure of different storage forms, they are only suitable for engineering needs and cannot truly reveal the distribution of the bottom pressure. There is no technology and method for directly measuring the friction force of the side wall.

Method used

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  • Test method and device measuring silo bulk material pressure and sidewall frictional force
  • Test method and device measuring silo bulk material pressure and sidewall frictional force

Examples

Experimental program
Comparison scheme
Effect test

test approach 1

[0015] Step 1: Use the weights and the calibration module that comes with the test device to calibrate each pressure sensor, and at the same time confirm that the lifting system and data acquisition system of the device are operating normally;

[0016] Step 2: Move the bottom plate to the bottom of the lower cylinder, and reset the readings of each sensor of the test device to zero;

[0017] Step 3: The height of each grain loading can be set according to the test accuracy requirements. Generally, it is 1 / 10 to 1 / 20 of the total grain loading height H. The scale on the wall checks the flatness of the grain surface, measures and records the height of the grain pile at the same time, records the weight of the loaded grain, stands still for 1 to 2 minutes, records the pressure sensors of the middle cylinder, the pressure sensors of the lower cylinder, and the pressure sensors of each tray. And the readings of various sensors such as the base plate displacement sensor;

[0018] S...

test approach 2

[0025] Step 1: Same as test plan 1;

[0026] Step 2: Raise the bottom plate of the silo to the lowest point of the measuring unit ring in the middle section of the cylinder wall, and reset the readings of each sensor of the test device to zero;

[0027] Step 3: Fill the silo with grain and record the weight of the grain loaded. After reaching the expected amount of grain, use the scraper to level the grain in the bin, and use the ruler on the bin wall to check the flatness of the grain surface, and measure and record the height of the grain pile at the same time. Stand still for 1 to 3 minutes, during which the readings of each sensor in the initial state of the test were recorded several times, including the pressure sensor of the middle cylinder, the pressure sensor of the lower cylinder, the pressure sensor of the bottom plate tray and the displacement sensor of the tray;

[0028] Step 4: The bottom plate is slowly lowered step by step through the lifting screw, and each t...

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Abstract

The invention relates to the bulk material pressure theory basis research and engineering application research, provides a test method and device measuring silo bulk material pressure and sidewall frictional force, aims to detect the silo bottom pressure field and side wall friction force distribution rules, and provides test key technology and method for bulk material pressure theory and silo storage material designs. The device cores on test model chamber micro slit separating design and automatic pressure acquisition and analysis on each separation body; the silo bottom and silo wall are separated, so the silo bottom plate pressure and silo side wall resistance can be respectively measured; the bottom plate is segmented into a plurality of concentric discs, so the silo bottom pressure distribution can be measured; the silo wall is provided with measuring unit rings separated from the upper and lower silo walls, and the bottom plate can be controlled to elevate, thus measuring the bulk material normal pressure and friction resistance on a random elevation of the silo wall; a data automatic acquisition and analysis system can realize man-machine interactions, and is simple in operations; test scheme design and calculation design can be realized, thus obtaining the vertical stress distribution of the horizontal cross section material on a random elevation.

Description

technical field [0001] The invention relates to a method and a device for measuring the uneven pressure of bulk materials in a silo on the bottom of the silo, the lateral pressure of the silo wall and the distribution law of friction force, which are used for basic research and engineering application research of bulk material pressure theory. Background technique [0002] Bulk materials have complex mechanical properties, and their internal pressure field distribution is affected by many factors, such as stacking height, internal friction angle, friction coefficient, etc. At present, most of the research work on the storage pressure is concentrated on the side pressure of the storage, and there are few studies on the friction of the bottom and side walls. The existing bulk material pressure theory is not perfect for the distribution and change law of the pressure field at the bottom of bulk grain. Although the existing codes provide calculation methods for bottom pressure ...

Claims

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Application Information

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IPC IPC(8): G01L5/00
CPCG01L5/00G01L5/0028
Inventor 韩阳段君峰陈家豪蒋铭凯张珂华杜海洋
Owner HENAN UNIVERSITY OF TECHNOLOGY
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