CN115523994A - Method for judging accuracy of batching scale - Google Patents

Abstract

The invention relates to a method for judging accuracy of a batching scale, and belongs to the technical field of metallurgical equipment. The technical scheme of the invention is as follows: and comparing the weighing value change of the batching bin on the batching scale with the weighing value of the belt scale in the batching process of the system to calculate a deviation value, and judging the weighing accuracy of the batching scale by utilizing the deviation value. The invention has the beneficial effects that: the precision of the batching scale is evaluated by comparing the weight change of the batching bin with the value of the batching scale, and the defective batching scale is found in time for maintenance and calibration, so that accurate batching is ensured; meanwhile, the work of maintenance personnel is reasonably planned, and the labor cost is reduced; the existing metering equipment is fully utilized, and no additional cost is added.

Description

Method for judging accuracy of batching scale

Technical Field

The invention relates to a method for judging accuracy of a batching scale, and belongs to the technical field of metallurgical equipment.

Background

The belt weigher is a main device for measuring the material consumption in continuous production operation, and is widely applied to the burdening links of production processes such as sintering, pelletizing, stock yards, iron making and the like. The measurement accuracy has important influence on the total amount, the amount of all the materials participating in the proportioning and the precision of the proportion. The accuracy of the batching scale is guaranteed, and the quality of the craft production product is of great significance. The main mode of guaranteeing the precision of the belt weigher at present is daily maintenance and regular calibration. The long calibration interval time affects the accuracy of material metering, but too often causes great pressure on maintenance personnel and is not favorable for continuous production of the process. Therefore, the method has important significance for making preliminary judgment on the accuracy of the batching scale in the production process.

Disclosure of Invention

The invention aims to provide a method for judging the accuracy of a batching scale, which evaluates the precision of the batching scale by comparing the weight change of a batching bin with the value of the batching scale, and timely finds out the batching scale with problems to maintain and calibrate so as to ensure accurate batching; meanwhile, the work of maintenance personnel is reasonably planned, and the labor cost is reduced; the existing metering equipment is fully utilized, extra cost is not increased, and the problems in the background technology are effectively solved.

The technical scheme of the invention is as follows: a method for judging accuracy of a batching scale comprises the following steps: the weighing value change of a batching bin on a batching scale in the batching process of the system is compared with the weighing value of a belt scale to calculate a deviation value, and the accuracy of the weighing value of the batching scale is judged by utilizing the deviation value.

The method comprises the following specific steps:

(1) Taking a bin weight value signal and a belt scale weighing flow signal;

(2) Setting calculation starting time, and measuring a weighing period; calculating the difference between the bin weight change and the flow accumulation in the period; automatically storing the current calculation data into a corresponding storage area each time a set period is reached, then resetting the current data area, and recalculating the next period data;

(3) Recording the deviation value and setting a deviation alarm value;

(4) And evaluating the weighing precision of the batch weigher by the fact that the deviation value exceeds the alarm value or the deviation value curve in a plurality of continuous measurement periods.

In the step (3), a deviation correction value is introduced, and manual input or big data calculation is performed to make up for errors of the bin weight measurement value.

The invention has the beneficial effects that: the precision of the batching scale is evaluated by comparing the weight change of the batching bin with the value of the batching scale, and the defective batching scale is found in time for maintenance and calibration, so that accurate batching is ensured; meanwhile, the work of maintenance personnel is reasonably planned, and the labor cost is reduced; the existing metering equipment is fully utilized, and no additional cost is added.

Drawings

FIG. 1 is an interface diagram of current cycle deviation values and cumulative values of the present invention;

FIG. 2 is an interface diagram showing the operation accuracy of the batch weigher in response to the deviation warning value exceeding times for approximately 5 times according to the present invention;

FIG. 3 is a flowchart illustrating a method for calculating an offset value according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

A method for judging accuracy of a batching scale comprises the following steps: the weighing value change of a batching bin on a batching scale in the batching process of the system is compared with the weighing value of a belt scale to calculate a deviation value, and the accuracy of the weighing value of the batching scale is judged by utilizing the deviation value.

The method comprises the following specific steps:

(1) Taking a bin weight value signal and a belt scale weighing flow signal;

(2) Setting calculation starting time, and measuring a weighing period; calculating the difference between the bin weight change and the flow accumulation in the period; automatically storing the current calculation data into a corresponding storage area each time a set period is reached, then resetting the current data area, and recalculating the next period data;

(3) Recording the deviation value and setting a deviation alarm value;

(4) And evaluating the weighing precision of the batching scale by continuously measuring the deviation value exceeding the alarm value or the deviation value curve in a plurality of measuring periods.

In the step (3), a deviation correction value is introduced, and manual input or big data calculation is performed to make up for errors of the bin weight measurement value.

The embodiment is as follows:

1) And taking a blending material proportioning bin seed signal A, blending a blending material belt scale instantaneous value B and a blending material bin feeding signal K.

2) After a bin feeding signal K disappears, the bin weight value is delayed until the bin weight value stably descends at a constant speed, a bin weight value A1 of the bin is recorded, a bin weight reduction value delta A = A1-A is calculated by using the difference between the A1 and the value A, and an integrated value SUM _ B of an instantaneous value B is calculated (the material balance has a feeding integrated value which can be directly used for calculating an accumulated difference value).

3) The cumulative deviation C of the bin weight and the weighing value can be obtained from the difference between the Delta A and the SUM _ B.

4) A unit period a is set when Δ a = a. The deviation number C is recorded as the last cycle data storage area while the last cycle data is sequentially advanced. A total of 5 sets of historical data were saved. And clearing the current data, and recording the difference values of the A1, the SUM _ B and the current period again.

5) Setting a deviation alarm value C1, alarming in the current period when the calculation difference value C of each period is larger than C1, wherein the number of alarm values in the continuous periods is different, and the accuracy of the batching scale displays different grades.

6) Meanwhile, according to the difference statistics c occurring when the balance is just calibrated each time, the deviation correction setting can be carried out on the calculated difference. And the calculated difference value C is compared with C1 after being corrected.

Claims (3)

1. A method for judging accuracy of a batching scale is characterized by comprising the following steps: and comparing the weighing value change of the batching bin on the batching scale with the weighing value of the belt scale in the batching process of the system to calculate a deviation value, and judging the weighing accuracy of the batching scale by utilizing the deviation value.

2. The method for determining the accuracy of a dispensing scale according to claim 1, wherein: the method comprises the following specific steps:

(1) Taking a bin weight value signal and a belt scale weighing flow signal;

(2) Setting calculation starting time, and measuring a weighing period; calculating the difference between the bin weight change and the flow accumulation in the period; automatically storing the current calculation data into a corresponding storage area each time a set period is reached, then resetting the current data area, and recalculating the next period data;

(3) Recording the deviation value and setting a deviation alarm value;

(4) And evaluating the weighing precision of the batching scale by continuously measuring the deviation value exceeding the alarm value or the deviation value curve in a plurality of measuring periods.

3. The method for determining the accuracy of a batch scale according to claim 2, wherein: in the step (3), a deviation correction value is introduced, and manual input or big data calculation is performed to make up for errors of the bin weight measurement value.

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