CN111504736A - Automatic sample preparation method and automatic sample preparation equipment with sample loss rate accounting function - Google Patents
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Abstract
The invention discloses an automatic sample preparation method with sample loss rate accounting, which comprises the steps of weighing and determining the feeding quality and the discharging quality of a sample preparation process for each section of sample preparation link of automatic sample preparation equipment, calculating the sample loss rate of the sample preparation process according to the feeding quality and the discharging quality, judging that the sample retentivity of the sample preparation process is unqualified when the sample loss rate is greater than or equal to a preset unqualified threshold value, and judging that the sample retentivity of the sample preparation process is qualified when the sample loss rate is smaller than a preset qualified threshold value. The method has the advantages of automatically accounting the loss rate of the sample in the sample preparation process, judging whether the retentivity of the sample in the sample preparation process is qualified or not, finding the abnormality in the sample preparation process as soon as possible, ensuring the sample preparation precision, along with high automation degree, good precision and the like.
Description
Technical Field
The invention relates to the field of coal and ore sample preparation, in particular to an automatic sample preparation method and automatic sample preparation equipment with sample loss rate accounting function.
Background
The unmanned automatic sample preparation system can automatically complete the whole sample preparation process under the unattended and intervened condition to obtain an ideal material sample representation. The sample preparation process generally comprises the links of sample conveying, air drying, crushing, division, powder preparation and the like, and unmanned automatic sample preparation is developed around two basic points of quality and quantity of each link. The quality management relates to the high efficiency and accuracy of the links of sample conveying, crushing, drying, division, powder preparation and the like so as to ensure the quality of the sample, and is the key point of common attention of the existing automatic sample preparation system. Weight management relates to the mass trend, distribution and loss of material from the beginning of its entry into the system to its exit from the system. In practical situations, the sample is lost to different degrees through various automatic sample preparation links, and the sample loss in a certain range is difficult to avoid and allowable. From the current situation, the loss of the system to the sample is only a qualitative conclusion, but no quantitative calculation and analysis exist, and the loss of the sample in the system is unknown, so that the automatic sample preparation system cannot be evaluated and fed back from a macroscopic level, the weight management is weak, and the actual accounting of the sample quality is a link most concerned by the evaluation of the sample preparation system by a client at present.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides an automatic sample preparation method and automatic sample preparation equipment with sample loss rate accounting, which can automatically account the sample loss rate in the sample preparation process, judge whether the sample retentivity in the sample preparation process is qualified, discover the abnormality in the sample preparation process as soon as possible, ensure the sample preparation precision, have high automation degree and good precision.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: an automatic sample preparation method with sample loss rate accounting is characterized in that for each sample preparation link of automatic sample preparation equipment, feeding quality and discharging quality of the sample preparation process are weighed and determined, the sample loss rate of the sample preparation process is calculated according to the feeding quality and the discharging quality, when the sample loss rate is larger than or equal to a preset unqualified threshold value, the sample retentivity of the sample preparation process is judged to be unqualified, and when the sample loss rate is smaller than a preset qualified threshold value, the sample retentivity of the sample preparation process is judged to be qualified.
Furthermore, in each section of sample preparation link of the automatic sample preparation equipment, a feed material weighing unit arranged at a feed material inlet is used for weighing and determining the feed material quality, a sample weighing unit arranged at a target sample filling unit is used for weighing and determining the quality of a target sample, a sample discarding weighing unit arranged at a sample discarding collection unit is used for weighing and determining the quality of a discarded sample, and the discharge quality is the sum of the quality of the target sample and the quality of the discarded sample.
Further, the sample preparation link comprises at least one of a primary crushing link, a secondary crushing link and a powder preparation link;
the value range of the qualified threshold value of the primary crushing link is 3% -8%, the value range of the unqualified threshold value is 6% -10%, and the qualified threshold value of the primary crushing link is smaller than the unqualified threshold value;
the value range of the qualified threshold value of the secondary crushing link is 3% -8%, the value range of the unqualified threshold value is 6% -10%, and the qualified threshold value of the secondary crushing link is smaller than the unqualified threshold value;
the qualified threshold value of the milling link ranges from 0.5% to 1.5%, the unqualified threshold value ranges from 1.5% to 2.5%, and the qualified threshold value of the milling link is smaller than the unqualified threshold value.
Further, judging whether the ratio of the accumulated residual quantity of the sample preparation link in the current section to the feeding quality of the sample preparation is greater than a preset blending threshold value or not, and if so, judging that the blending rate of the sample preparation is unqualified; the accumulated residual amount refers to an accumulated value of a difference value of the feeding quality and the discharging quality in each sample preparation process in the sample preparation link of the section; and clearing the accumulated residual amount after cleaning sample preparation equipment in the sample preparation link of the section.
Further, the value range of the blending threshold value of the primary crushing link is 6-10%;
the value range of the blending threshold value of the secondary crushing link is 6-10%;
the value range of the blending threshold value of the milling link is 1.5 to 2.5 percent.
An automatic sample preparation device with sample loss rate accounting comprises at least 1 sample preparation assembly line, wherein the sample preparation assembly line comprises a feeding weighing unit, a discharging weighing unit and a control processing unit, and the feeding weighing unit and the discharging weighing unit are respectively connected with the control processing unit;
the feeding weighing unit is used for weighing and determining the feeding quality of the automatic sample preparation equipment;
the discharging weighing unit is used for weighing and determining the discharging quality of the automatic sample preparation equipment;
the control processing unit calculates the sample loss rate in the sample preparation production line according to the feeding quality and the discharging quality, and judges that the sample quality retentivity of the sample preparation production line is unqualified when the sample loss rate is greater than or equal to a preset unqualified threshold value; and when the sample loss rate is smaller than a preset qualified threshold value, judging that the sample quality retentivity of the sample preparation assembly line is qualified.
Further, the feeding weighing unit is arranged at a feeding port of the sample preparation assembly line; the discharging weighing unit comprises a sample weighing unit and a sample discarding weighing unit; the sample weighing unit is arranged at a target sample filling unit of the sample preparation production line; the sample discarding weighing unit is arranged at a sample discarding collecting unit of the sample preparation production line;
the sample weighing unit is used for weighing and determining the mass of a target sample; the abandoned sample weighing unit is used for weighing and determining the mass of the abandoned sample;
the discharging quality is the sum of the quality of the target sample and the quality of the abandoned sample.
Further, the sample preparation assembly line comprises at least one of a primary crushing assembly line, a secondary crushing assembly line and a powder preparation assembly line;
the value range of the qualified threshold of the primary crushing assembly line is 3% -8%, the value range of the unqualified threshold is 6% -10%, and the qualified threshold of the primary crushing assembly line is smaller than the unqualified threshold;
the value range of the qualified threshold of the secondary crushing assembly line is 3% -8%, the value range of the unqualified threshold is 6% -10%, and the qualified threshold of the secondary crushing assembly line is smaller than the unqualified threshold;
the qualified threshold value of the powder preparation production line ranges from 0.5% to 1.5%, the unqualified threshold value ranges from 1.5% to 2.5%, and the qualified threshold value of the powder preparation production line is smaller than the unqualified threshold value.
Further, the control processing unit is further configured to determine whether a ratio of an accumulated residual amount in the sample preparation link of the current segment to the feeding quality of the sample preparation is greater than a preset blending threshold, and if so, determine that the blending rate of the sample preparation is not qualified; the accumulated residual amount refers to an accumulated value of a difference value of the feeding quality and the discharging quality in each sample preparation process in the sample preparation link of the section; and clearing the accumulated residual amount after cleaning sample preparation equipment in the sample preparation link of the section.
Further, the value range of the blending threshold of the primary crushing assembly line is 6-10%;
the value range of the blending threshold value of the secondary crushing production line is 6-10%;
the value range of the blending threshold value of the powder preparation production line is 1.5-2.5%.
Furthermore, the sample preparation assembly line further comprises a cleaning unit, and the cleaning unit is connected with the control processing unit;
and the control processing unit controls the cleaning unit to remove the residual sample materials on the sample preparation assembly line when judging that the sample quality retentivity or the mixing rate is unqualified.
Further, the cleaning unit comprises at least 1 dust suction device arranged on the sample preparation production line. Compared with the prior art, the invention has the advantages that:
1. the automatic sample making machine can accurately analyze whether the sample prepared in the sample making process meets the sample making requirement or not by analyzing the feeding quality and the discharging quality in the sample making process while making the sample according to the set requirement, and timely remind a worker to process or automatically control the sample making equipment to clean when the sample is unqualified, so that the operation stability, the good reliability and the high precision of the sample making equipment are ensured.
2. The invention does not need the participation of working personnel in the sample preparation and loss rate accounting process, and has high automation degree and high efficiency.
3. The invention provides a detection mode and a verification method for the reliability of a system, which can improve the trust of a user on an automatic sample preparation system.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
FIG. 3 is a schematic diagram of a coal sample preparation process according to an embodiment of the present invention.
FIG. 4 is a schematic diagram of a coal sample preparation situation according to an embodiment of the present invention.
FIG. 5 is a schematic view of the accounting evaluation of coal sample preparation according to the embodiment of the present invention (the same accounting method is used for the primary crushing and the secondary crushing).
Fig. 6 is a schematic view of the accounting evaluation of the coal sample preparation (milling process of the milling line) according to the embodiment of the present invention.
Illustration of the drawings: 11. a feed inlet (primary); 12. a primary crushing unit; 13. a mass scaling unit; 14. a filling unit (primary); 15. a waste sample collection unit; 21. a feed inlet (secondary); 22. a secondary crushing unit; 23. a filling unit (secondary); 31. a feeding port (powder making); 32. filling unit (milling); 33. a waste sample collection unit (milling); 4. a robot arm.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention.
As shown in fig. 1, in the automatic sample preparation method with sample loss rate accounting according to this embodiment, for each sample preparation link of the automatic sample preparation device, the feeding quality and the discharging quality of the sample preparation process are weighed and determined, the sample loss rate of the sample preparation process is calculated according to the feeding quality and the discharging quality, when the sample loss rate is greater than or equal to a preset unqualified threshold value, the sample retentivity of the sample preparation process is judged to be unqualified, and when the sample loss rate is less than a preset qualified threshold value, the sample retentivity of the sample preparation process is judged to be qualified.
In this embodiment, in each sample preparation link of the automatic sample preparation device, a feed material weighing unit arranged at a feed material inlet is used for weighing and determining the feed material quality, a sample weighing unit arranged at a target sample filling unit is used for weighing and determining the quality of a target sample, a sample discarding weighing unit arranged at a sample discarding collection unit is used for weighing and determining the quality of a discarded sample, and the discharge quality is the sum of the quality of the target sample and the quality of the discarded sample.
In this embodiment, the sample preparation link includes at least one of a primary crushing link, a secondary crushing link, and a milling link; the value range of the qualified threshold value of the primary crushing link is 3% -8%, the value range of the unqualified threshold value is 6% -10%, and the qualified threshold value of the primary crushing link is smaller than the unqualified threshold value; the value range of the qualified threshold value of the secondary crushing link is 3% -8%, the value range of the unqualified threshold value is 6% -10%, and the qualified threshold value of the secondary crushing link is smaller than the unqualified threshold value; the qualified threshold value of the milling link ranges from 0.5% to 1.5%, the unqualified threshold value ranges from 1.5% to 2.5%, and the qualified threshold value of the milling link is smaller than the unqualified threshold value.
In this embodiment, the method further includes determining whether a ratio of an accumulated residual amount in the sample preparation link of the current segment to the feeding quality of the sample preparation is greater than a preset blending threshold, and if so, determining that the blending rate of the sample preparation is not qualified; the accumulated residual quantity refers to an accumulated value of a difference value of the feeding quality and the discharging quality in each sample preparation process in the sample preparation link of the section; and clearing the accumulated residual quantity after cleaning sample preparation equipment in the sample preparation link of the section.
In this embodiment, the range of the blending threshold of the primary crushing link is 6% to 10%; the value range of the blending threshold value of the secondary crushing link is 6 to 10 percent; the value range of the blending threshold value of the milling link is 1.5 to 2.5 percent.
An automatic sample preparation device with sample loss rate accounting function comprises at least 1 sample preparation assembly line, wherein the sample preparation assembly line comprises a feeding weighing unit, a discharging weighing unit and a control processing unit, and the feeding weighing unit and the discharging weighing unit are respectively connected with the control processing unit; the feeding weighing unit is used for weighing and determining the feeding quality of the automatic sample preparation equipment; the discharging weighing unit is used for weighing and determining the discharging quality of the automatic sample preparation equipment; the control processing unit calculates the sample loss rate in the sample preparation production line according to the feeding quality and the discharging quality, and judges that the sample quality retentivity of the sample preparation production line is unqualified when the sample loss rate is greater than or equal to a preset unqualified threshold value; and when the sample loss rate is smaller than a preset qualified threshold value, judging that the sample quality retentivity of the sample preparation assembly line is qualified.
In this embodiment, the feeding weighing unit is arranged at a feeding port of the sample preparation assembly line; the discharging weighing unit comprises a sample weighing unit and a sample discarding weighing unit; the sample weighing unit is arranged at a target sample filling unit of the sample preparation production line; the abandoned sample weighing unit is arranged at a abandoned sample collecting unit of the sample preparation assembly line; the sample weighing unit is used for weighing and determining the mass of a target sample; the abandoned sample weighing unit is used for weighing and determining the mass of the abandoned sample; the discharging quality is the sum of the quality of the target sample and the quality of the abandoned sample.
In this embodiment, the sample preparation line includes at least one of a primary crushing line, a secondary crushing line, and a pulverizing line; the value range of the qualified threshold of the primary crushing assembly line is 3% -8%, the value range of the unqualified threshold is 6% -10%, and the qualified threshold of the primary crushing assembly line is smaller than the unqualified threshold; the value range of the qualified threshold of the secondary crushing assembly line is 3% -8%, the value range of the unqualified threshold is 6% -10%, and the qualified threshold of the secondary crushing assembly line is smaller than the unqualified threshold; the qualified threshold value of the powder preparation production line ranges from 0.5% to 1.5%, the unqualified threshold value ranges from 1.5% to 2.5%, and the qualified threshold value of the powder preparation production line is smaller than the unqualified threshold value.
In this embodiment, the control processing unit is further configured to calculate a sample loss amount of the sample preparation assembly line according to the feeding quality and the discharging quality; and calculating the sample loss accumulation amount in the same sample preparation production line, and judging that the sample quality retentivity of the sample preparation production line is unqualified when the sample loss accumulation amount is larger than a preset control threshold value.
In this embodiment, the control processing unit is further configured to determine whether a ratio of an accumulated residual amount in the sample preparation link of the current segment to the feeding quality of the sample preparation is greater than a preset blending threshold, and if so, determine that the blending rate of the sample preparation is not qualified; the accumulated residual quantity refers to an accumulated value of a difference value of the feeding quality and the discharging quality in each sample preparation process in the sample preparation link of the section; and clearing the accumulated residual quantity after cleaning sample preparation equipment in the sample preparation link of the section. The value range of the blending threshold of the primary crushing production line is 6-10%; the value range of the blending threshold value of the secondary crushing production line is 6-10%; the value range of the blending threshold value of the powder preparation production line is 1.5 to 2.5 percent.
In this embodiment, the sample preparation assembly line further comprises a cleaning unit, and the cleaning unit is connected with the control processing unit; and the control processing unit controls the cleaning unit to remove the residual sample on the sample preparation flow line when judging that the sample quality retentivity or the mixing rate is unqualified. Further, it is preferred that the cleaning unit comprises at least 1 dust suction device arranged on the sample preparation line.
In this embodiment, as shown in fig. 3, the automatic sample preparation method and the automatic sample preparation apparatus according to the present invention are further described by a specific sample preparation flow of coal. The automatic sample preparation equipment shown in fig. 2 comprises 3 sample preparation production lines, namely a primary crushing production line, a secondary crushing production line and a powder preparation production line, wherein the 3 sample preparation production lines are respectively used for realizing a primary crushing link, a secondary crushing link and a powder preparation link of the automatic sample preparation, and the sample is circulated among different sample preparation production lines through a manipulator 4. The primary crushing assembly line comprises a feeding port (primary) 11, a primary crushing, a quality determining and reducing unit 13, a filling unit (primary) and a sample discarding and collecting unit 15. In this embodiment, the primary crushing line divides the sample material fed from the feeding port into a plurality of samples through the mass-determining and reducing unit 13, as shown in fig. 4, specifically including 4 parts of a full water sample, 1 part of a normal sample and 1 part of a prepared sample. When the granularity of the sample material input from the feeding port is larger than 6mm grade granularity, the sample material can be subjected to primary crushing by the primary crushing unit 12, so that the granularity of the sample prepared by the primary crushing assembly line meets the requirement of 6mm granularity.
In this embodiment, a feeding weighing unit is disposed at the feeding port, and is configured to weigh a mass M1 of the sample material fed through the feeding port, and send the sample material to the constant mass reduction unit 13 after weighing is completed, or send the sample material to the primary crushing unit 12 to be crushed into 6mm particle size and then to the constant mass reduction unit 13 when the particle size of the sample material is greater than 6mm particle size. The sample was fractionated into target samples including 4 divided whole water samples (masses of M2 to M5, respectively), 1 part of the positive sample (mass of M6) and 1 part of the backup sample (mass of M7) by the mass fractionating unit 13, as shown in fig. 4. The target sample is output from a filling unit of the sample preparation assembly line for filling, and a sample weighing unit is arranged at the filling unit. The sample weighing unit can be a weighing sensor and is arranged on a placing table of the sample bottle, when the empty sample bottle is conveyed to the placing table, the empty sample bottle can be weighed to determine the mass of the empty sample bottle, after the sample divided by the mass determining and dividing unit 13 is filled into the sample bottle, the sample bottle can be weighed to determine the mass of the filled sample bottle, and the mass of the target sample can be determined through twice mass data. The mass-reducing unit 13 may be provided with a plurality of sample filling units, each provided with a weighing cell, as required. The sample material after being reduced into the target sample is discharged and filled as a waste sample through the waste sample collection unit 15, and similarly, a waste sample weighing unit may be disposed at the waste sample collection unit 15 in the same manner as the sample weighing unit, and the mass of the waste sample is weighed and determined (mass M8). Then, the sample loss rate of the primary crushing line can be obtained by the formula (M1-M2-M3-M4-M5-M6-M7-M8)/M1. In this embodiment, as shown in fig. 5, it is preferable that the pass threshold is 5% and the fail threshold is 8%, when the calculated sample loss rate is less than 5%, the sample quality retentivity of the sample prepared by the primary crushing line is determined to be qualified, the anti-sticking performance and the anti-leakage performance of the automatic sample preparation equipment are determined to be qualified, and the sample preparation requirement is met, when the calculated sample loss rate is greater than or equal to 8%, the sample quality retentivity of the sample prepared by the primary crushing line is determined to be unqualified, the anti-sticking performance and the anti-leakage performance of the automatic sample preparation equipment are determined to be unqualified, and the sample preparation requirement is not met, when the calculated sample loss rate is greater than or equal to 5% and less than 8%, the sample quality retentivity of the sample obtained by the primary crushing line.
In this embodiment, the sample loss amounts of the primary crushing line are further accumulated, and the sample loss amount of the primary crushing line is calculated, that is, assuming that the primary crushing line performs sample preparation 4 times in sequence, the sample loss amount of the 1 st sample preparation is m1, the sample loss amount of the 2 nd sample preparation is m2, the sample loss amount of the 3 rd sample preparation is m3, and the sample loss amount of the 4 th sample preparation is m4, then the sample loss amount of the 1 st sample preparation is m1, the sample loss amount of the 2 nd sample preparation is m1+ m2, the sample loss amount of the 3 rd sample preparation is m1+ m2+ m3, and the sample loss amount of the 4 th sample preparation is m1+ m2+ m3+ m 4. The sample loss amount is (M1-M2-M3-M4-M5-M6-M7-M8), the total mass of the samples remained in the sample preparation flow line can be accurately reflected through the sample loss accumulation amount, when the sample loss accumulation amount is larger than a preset control threshold value, the primary crushing flow line is judged to have more samples remained in the finished sample preparation process, the primary crushing flow line needs to be cleaned, otherwise, the samples remained in the primary crushing flow line can cause pollution to the samples input in the next sample preparation process, so that the samples are mixed, and the accuracy of the samples is influenced.
In this embodiment, the automatic sample preparation device further comprises a secondary crushing production line, and the secondary crushing link is realized through the secondary crushing production line. The secondary crushing production line comprises a feeding port (secondary) 21, a secondary crushing unit 22, a secondary dividing unit, a drying unit and a filling unit (secondary) 23. In the secondary crushing link of the embodiment, a main sample with a particle size of 6mm prepared in the primary crushing line is fed into a feeding port of the secondary crushing line, crushed into a sample with a particle size of 3mm by the secondary crushing unit 22, and then divided into 4 samples to be checked (with the mass respectively being M9, M10, M11 and M12) and 1 part of dry sample by the secondary crushing unit, the dry sample is dried by the drying unit, the dried sample has the mass being M13, and the waste sample of the secondary crushing line has the mass being M14. The same principle as the primary crushing assembly line is adopted, the sample prepared by the secondary crushing assembly line is output from the filling unit for filling, the filling unit is also provided with a sample weighing unit for weighing and determining the mass of the sample, and the abandoned sample of the secondary crushing assembly line is filled, collected and weighed through the abandoned sample collecting unit 15 to determine the mass of the sample. And determining the sample loss amount and the sample loss rate of the secondary crushing assembly line for preparing the sample each time, judging whether the sample quality retentivity of the secondary crushing assembly line for preparing the sample at this time is qualified or not according to the sample loss rate, judging whether the sample can be polluted by the sample remained in the secondary crushing assembly line or not according to the sample loss accumulation amount, and judging whether the sample can be mixed or not according to the sample condition remained in the secondary crushing assembly line so as to influence the precision of the sample prepared at this time.
In this embodiment, as shown in fig. 5, the secondary crushing line preferably has a pass threshold of 5% and a fail threshold of 8%, when the calculated loss rate of the sample is less than 5%, the quality retentivity of the sample prepared by the secondary crushing line is determined to be qualified, the anti-sticking performance and the anti-leakage performance of the automatic sample preparation equipment are determined to be qualified, and the sample preparation requirement is met, when the calculated loss rate of the sample is greater than or equal to 8%, the quality retentivity of the sample prepared by the secondary crushing line is determined to be unqualified, the anti-sticking performance and the anti-leakage performance of the automatic sample preparation equipment are determined to be unqualified, and the sample preparation requirement is not met, when the calculated loss rate of the sample is greater than or equal to 5% and less than 8%, the quality retentivity of the sample prepared by the secondary.
In this embodiment, the automatic sample preparation device further includes a powder preparation line, which includes a feeding port (powder preparation) 31, a powder preparation crushing unit, a rotary division unit, a filling unit (powder preparation) 32, and a sample discarding collection unit (powder preparation) 33, and the powder preparation line is used for further crushing the dried sample prepared by the secondary crushing line into powder to prepare an analysis sample. In this embodiment, 3 analysis samples (the masses are respectively denoted as M16, M17, and M18) are prepared in the milling line, the prepared analysis samples are output and filled through a sample filling unit, a sample weighing unit is also arranged at the filling unit and used for weighing and determining the mass of the analysis samples, and the waste samples in the milling line are also filled, collected and weighed through a waste sample collection unit (milling) 33 and are denoted as M15. Then the sample loss amount of the powder process line can be determined to be M13-M16-M17-M18-M15, and the sample loss rate is (M13-M16-M17-M18-M15)/M13. Similarly, the sample loss condition of the powder preparation assembly line in the sample preparation of the round can be determined through the sample loss rate, whether the sample weight retentivity of the sample preparation of the round is qualified or not is determined, the sample loss amount is accumulated, the sample loss accumulated amount is calculated, the sample condition remaining in the powder preparation assembly line can be judged through the sample loss accumulated amount, and whether the sample can be polluted by the sample remaining in the powder preparation assembly line or not is judged, so that sample mixing is caused, and the precision of the sample prepared at this time is influenced.
In this embodiment, as shown in fig. 6, the acceptable threshold of the powder production line is preferably 1%, the unacceptable threshold is 2%, when the calculated loss rate of the sample is less than 1%, the quality retentivity of the sample produced by the powder production line is determined to be acceptable, the anti-sticking performance and the anti-leakage performance of the automatic sample production equipment are determined to be acceptable, and the sample production requirement is met, when the calculated loss rate of the sample is greater than or equal to 2%, the quality retentivity of the sample produced by the powder production line is determined to be unacceptable, the anti-sticking performance and the anti-leakage performance of the automatic sample production equipment are determined to be unacceptable, and when the calculated loss rate of the sample is greater than or equal to 1% and less than 2%, the quality retentivity of the sample produced by the powder production line is determined to be favorable, and.
In this embodiment, each sample preparation pipeline (i.e., corresponding to each sample preparation link) has a corresponding blending threshold, and the value range of the blending threshold of the primary crushing link is 6% to 10%; the value range of the blending threshold value of the secondary crushing link is 6-10%; the value range of the blending threshold value of the milling link is 1.5 to 2.5 percent. Because in each sample preparation process, coal with certain mass remains in the sample preparation production line, the sample mass remaining in the sample preparation production line in the sample preparation process can be determined by calculating the difference between the feeding mass and the discharging mass of each sample preparation. Of course, for a specific sampling process, the difference between the feeding quality and the discharging quality obtained by calculation may be a positive number, that is, a part of the sample remains in the sample preparation line, or a negative number, that is, the sample that originally remained in the sample preparation line falls down and is mixed with the sample, so that the discharging quality is greater than the feeding quality. Of course, as long as the ratio of the mass remaining in the sample preparation line to the feed mass during the sample preparation is less than the set blending threshold, the sample quality is still considered to be qualified during the sample preparation process, and when the ratio is greater than or equal to the set blending threshold, the sample during the sample preparation process is considered to be mixed with more samples remaining in the sample preparation line, so that the sample preparation can be seriously polluted, the precision of the sample preparation can be influenced, the sample preparation line is considered to be unqualified, and the sample preparation line needs to be cleaned.
In this embodiment, the value of the blending threshold of the primary crushing pipeline is preferably 8%; the value of the blending threshold of the secondary crushing production line is preferably 8%; the value of the blending threshold of the powder preparation production line is preferably 2%. That is, for the primary crushing production line or the secondary crushing production line, the feeding mass during sample preparation is 100kg, and if the mass of the sample remaining in the sample preparation production line reaches 100 × 8% =8kg, the remaining sample is considered to pollute the sample prepared this time, and the sample prepared this time is an unqualified sample, and the sample preparation production line needs to be cleaned to prepare the sample again; for the powder preparation production line, the feed material mass during the sample preparation is 10kg, if the mass of the sample remained in the powder preparation production line reaches 10 x 2% =0.2kg, the sample remained in the powder preparation production line is considered to pollute the sample, the sample prepared at this time is unqualified, and the sample preparation needs to be carried out again after the powder preparation production line is cleaned.
In this embodiment, can analyze the antiseized nature and the leak proofness circumstances of system appearance assembly line through sample loss rate index, when sample loss rate is unqualified, explain that system appearance assembly line probably has remained more sample, can pollute the sample of system appearance next time, perhaps, explain that system appearance assembly line has more sample to leak outside the assembly line, can influence the normal work of system appearance system, pollutes system appearance environment. The mixing condition of the samples prepared in the sample preparation process can be analyzed through the mixing rate index, and when the mixing rate index is unqualified, the prepared samples are mixed with more residual samples, the prepared samples are polluted, and sample preparation needs to be carried out again.
It should be noted that, this embodiment is only described with reference to one sample preparation process of coal, and does not limit the number of sample preparation pipelines included in the automatic sample preparation device and the setting condition of the sample preparation device in each sample preparation pipeline, and the devices in the automatic sample preparation device may also be reused among different sample preparation pipelines as required, for example, in this embodiment, the discarded sample collection unit 15 is reused in the primary crushing pipeline and the secondary crushing pipeline, and the discarded samples of both sample preparation pipelines are collected, weighed, and filled by the discarded sample collection unit 15. Each sample preparation assembly line is provided with a cleaning unit, when the sample preparation assembly line is determined to be unqualified through the sample loss rate and/or the sample loss accumulation amount, the cleaning unit corresponding to the sample preparation assembly line can be automatically started for cleaning, meanwhile, an alarm signal can be sent out to remind a sample preparation person to investigate reasons, and the sample preparation person can manually clean the sample preparation assembly line.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (11)
1. An automatic sample preparation method with sample loss rate accounting is characterized in that: and weighing and determining the feeding quality and the discharging quality of the sample preparation process for each section of sample preparation link of the automatic sample preparation equipment, calculating the sample loss rate of the sample preparation process according to the feeding quality and the discharging quality, judging that the sample retentivity of the sample preparation process is unqualified when the sample loss rate is greater than or equal to a preset unqualified threshold value, and judging that the sample retentivity of the sample preparation process is qualified when the sample loss rate is less than a preset qualified threshold value.
2. The automatic sample preparation method with sample loss rate accounting according to claim 1, characterized in that: in each section of sample preparation link of the automatic sample preparation equipment, a feed material weighing unit arranged at a feed material inlet is used for weighing and determining the feed material quality, a sample weighing unit arranged at a target sample filling unit is used for weighing and determining the quality of a target sample, a sample discarding weighing unit arranged at a sample discarding collection unit is used for weighing and determining the quality of a discarded sample, and the discharge quality is the sum of the quality of the target sample and the quality of the discarded sample.
3. The automatic sample preparation method with sample loss rate accounting according to claim 2, characterized in that: the sample preparation link comprises at least one of a primary crushing link, a secondary crushing link and a powder preparation link;
the value range of the qualified threshold value of the primary crushing link is 3% -8%, the value range of the unqualified threshold value is 6% -10%, and the qualified threshold value of the primary crushing link is smaller than the unqualified threshold value;
the value range of the qualified threshold value of the secondary crushing link is 3% -8%, the value range of the unqualified threshold value is 6% -10%, and the qualified threshold value of the secondary crushing link is smaller than the unqualified threshold value;
the qualified threshold value of the milling link ranges from 0.5% to 1.5%, the unqualified threshold value ranges from 1.5% to 2.5%, and the qualified threshold value of the milling link is smaller than the unqualified threshold value.
4. The automatic sample preparation method with sample loss rate accounting according to claim 3, characterized in that: judging whether the ratio of the accumulated residual quantity of the sample preparation link in the current section to the feeding quality of the sample preparation is greater than a preset blending threshold value or not, and if so, judging that the blending rate of the sample preparation is unqualified; the accumulated residual amount refers to an accumulated value of a difference value of the feeding quality and the discharging quality in each sample preparation process in the sample preparation link of the section; and clearing the accumulated residual amount after cleaning sample preparation equipment in the sample preparation link of the section.
5. The automatic sample preparation method with sample loss rate accounting according to claim 4, characterized in that: the value range of the blending threshold value of the primary crushing link is 6-10%;
the value range of the blending threshold value of the secondary crushing link is 6-10%;
the value range of the blending threshold value of the milling link is 1.5 to 2.5 percent.
6. An automatic sample preparation device with sample loss rate accounting, characterized in that: the device comprises at least 1 sample preparation assembly line, wherein the sample preparation assembly line comprises a feeding weighing unit, a discharging weighing unit and a control processing unit, and the feeding weighing unit and the discharging weighing unit are respectively connected with the control processing unit;
the feeding weighing unit is used for weighing and determining the feeding quality of the automatic sample preparation equipment;
the discharging weighing unit is used for weighing and determining the discharging quality of the automatic sample preparation equipment;
the control processing unit calculates the sample loss rate in the sample preparation production line according to the feeding quality and the discharging quality, and judges that the sample quality retentivity of the sample preparation production line is unqualified when the sample loss rate is greater than or equal to a preset unqualified threshold value; and when the sample loss rate is smaller than a preset qualified threshold value, judging that the sample quality retentivity of the sample preparation assembly line is qualified.
7. The automated sample preparation apparatus with sample loss rate accounting according to claim 6, wherein: the feeding weighing unit is arranged at a feeding port of the sample preparation assembly line; the discharging weighing unit comprises a sample weighing unit and a sample discarding weighing unit; the sample weighing unit is arranged at a target sample filling unit of the sample preparation production line; the sample discarding weighing unit is arranged at a sample discarding collecting unit of the sample preparation production line;
the sample weighing unit is used for weighing and determining the mass of a target sample; the abandoned sample weighing unit is used for weighing and determining the mass of the abandoned sample;
the discharging quality is the sum of the quality of the target sample and the quality of the abandoned sample.
8. The automated sample preparation apparatus with sample loss rate accounting according to claim 7, wherein: the sample preparation assembly line comprises at least one of a primary crushing assembly line, a secondary crushing assembly line and a powder preparation assembly line;
the value range of the qualified threshold of the primary crushing assembly line is 3% -8%, the value range of the unqualified threshold is 6% -10%, and the qualified threshold of the primary crushing assembly line is smaller than the unqualified threshold;
the value range of the qualified threshold of the secondary crushing assembly line is 3% -8%, the value range of the unqualified threshold is 6% -10%, and the qualified threshold of the secondary crushing assembly line is smaller than the unqualified threshold;
the qualified threshold value of the powder preparation production line ranges from 0.5% to 1.5%, the unqualified threshold value ranges from 1.5% to 2.5%, and the qualified threshold value of the powder preparation production line is smaller than the unqualified threshold value.
9. The automated sample preparation apparatus with sample loss rate accounting according to claim 8, wherein: the control processing unit is also used for judging whether the ratio of the accumulated residual quantity of the sample preparation link in the section to the feeding quality of the sample preparation is greater than a preset blending threshold value or not, and if so, judging that the blending rate of the sample preparation is unqualified; the accumulated residual amount refers to an accumulated value of a difference value of the feeding quality and the discharging quality in each sample preparation process in the sample preparation link of the section; and clearing the accumulated residual amount after cleaning sample preparation equipment in the sample preparation link of the section.
10. The automated sample preparation apparatus with sample loss rate accounting according to claim 9, wherein: the sample preparation assembly line further comprises a cleaning unit, and the cleaning unit is connected with the control processing unit;
and the control processing unit controls the cleaning unit to remove the residual sample materials on the sample preparation assembly line when judging that the sample quality retentivity or the mixing rate is unqualified.
11. The automated sample preparation apparatus with sample loss rate accounting according to claim 10, wherein: the cleaning unit comprises at least 1 dust suction device arranged on the sample preparation production line.
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