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Large tonnage material level electronic scale and correcting method of weigh without counter poise

An electronic scale and large-tonnage technology, applied in the field of electronic scales, can solve the problems of increased difficulty in the design of the feed inlet, difficulties in installation and maintenance, and difficulty in measuring the correct material level.

Active Publication Date: 2009-02-11
YUYAO PACIFIC WEIGHING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The measurement error of the material level is very large. The measured material level is affected by the unevenness of the material and the pile angle, so it is difficult to measure the correct material level. Therefore, the calculated volume is also incorrect. and other effects, the final weight error will be greater
The installation position of the ultrasonic level gauge must be on the top of the silo, which is difficult to install and maintain. In addition, the upper part of the silo is the feed port of the material, which adds difficulty to the design of the feed port
Therefore, these measurement methods can only detect the material level in the silo, and cannot carry out batching control based on the measurement data.

Method used

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  • Large tonnage material level electronic scale and correcting method of weigh without counter poise
  • Large tonnage material level electronic scale and correcting method of weigh without counter poise
  • Large tonnage material level electronic scale and correcting method of weigh without counter poise

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Experimental program
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Effect test

Embodiment

[0070] Large tonnage material level electronic scale example

[0071] Such as figure 1 , figure 2 In the structure of the material level electronic scale shown, the material silo 3 is placed directly on the load cell 1 by loading the support ear seat 5, and the position of the support ear seat 5 is required to be selected at a relatively high position, above the center of gravity of the material silo . Because the size of the silo is relatively large, the present invention adopts 4 column type weighing sensors to form an electronic scale to reduce the partial pressure of the silo on the foundation. Among the figure, 4 is a feeding mechanism, and 2 is a base.

[0072] Such as image 3 , Figure 4 As shown in the installation diagram of the load cell, the upper end of the load cell 1 is a spherical surface 11, which is connected to the indenter 7. The lower part of the indenter is a concave spherical surface, and the radius of the spherical surface is larger than the spher...

example

[0104] The rated input signal of the weighing instrument is 30mV (Vcfs), and the A / D conversion output value is required to be 600,000 yards (M) at the factory, but because of the discreteness of the components, the actual input signal A / D converter per millivolt The value is 20100 yards (C). When the weighing instrument leaves the factory, the consistency calibration is carried out on the weighing instrument so that the output value is 600,000 yards at the time of the rated input signal. The in-factory correction coefficient is obtained according to formula (6).

[0105] DJNc=M / (Vifs×C)=600000 / (30×20100)=0.99502

[0106] The rated range of the material level electronic scale is 1000t (W), and the weighing instrument displays 1000.0t when it is loaded with 1000t, then the Dfs is 10000, and 4 (n) load cells with a rated range of 500t (Wcfs) are selected, and the output sensitivity of the sensor is They are 1.512mV / V(S1), 1.514mV / V(S2), 1.493mV / V(S3), 1.498mV / V(S4), and the sens...

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Abstract

The invention relates to a large-tonnage level electronic scale and a non-weight weighing correction method. The electronic scale body is provided with a charging barrel bin, and four or more uniformly distributed support bearing lug seats. A weighing sensor with a cylindrical structure is installed below each support bearing lug seat; the weighing sensor is installed on a base; a spherical surface is formed on the upper end of the weighing sensor and connected with a pressure with an end surface being an concave spherical surfaced; an upper press plate and a lower press plate are connected with the scale body and the base; an adjusting shim is placed on the upper loaded press plate so as to adjust the installation height of each sensor. The non-weight weighing connection method is suitable for the weighing correction of a plurality of resistance strain sheet type weighing sensors in parallel connection, and comprises the steps of calculating an output signal value of a weighing sensor, figuring out a consistent correction coefficient of a weighing instrument and working out the correction efficient of the weighing instrument. The invention has the advantages of simple structure, convenient installation, high weighing precision, great cost performance and convenient weighing correction.

Description

technical field [0001] The invention relates to an electronic scale, in particular to a large-tonnage bin-type material level electronic scale and a weighing correction method. Background technique [0002] my country's iron and steel metallurgical enterprises, especially large iron and steel plants, have adopted the transformation of eliminating small blast furnaces and small converters and building new large blast furnaces and converters. The scale effect can achieve energy saving and emission reduction, improve production efficiency, and improve product quality. The current new blast furnaces are all at 2000m 3 Above, the matching raw material storage and batching silos are all large-scale. Large-tonnage silos for raw material storage and batching are also required in the chemical, food and thermal power industries. With the improvement of product quality, raw material consumption, and cost management, the measurement requirements for this large-tonnage silo are getting...

Claims

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Application Information

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IPC IPC(8): G01G17/00G01G23/01G01F23/20
Inventor 仇关根
Owner YUYAO PACIFIC WEIGHING ENG
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