CN112345056A - Method for calibrating and verifying precision of decrement scale by substitute - Google Patents
Method for calibrating and verifying precision of decrement scale by substitute Download PDFInfo
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- CN112345056A CN112345056A CN202011092776.2A CN202011092776A CN112345056A CN 112345056 A CN112345056 A CN 112345056A CN 202011092776 A CN202011092776 A CN 202011092776A CN 112345056 A CN112345056 A CN 112345056A
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Abstract
The invention relates to a method for calibrating and verifying the precision of a decrement scale by using substitutes, wherein the substitutes with the mass of about 1000Kg are divided into a large-mass series of substitutes and a small-mass series of substitutes, and the prepared series of substitutes are traced and numbered and then are stored on a special platform and a house on a production site; carrying out numerical value tracing and static calibration on the selected substitute, and carrying out single-bucket material calibration decrement weighing; and finally, verifying the precision of the weight-reducing scale in a production process by a real object, comparing the net weight of the added materials detected by the trade scale with the net weight of the materials dispensed by the weight-reducing scale for a period of time, and calibrating the weight-reducing scale by using serial substitutes at any time when the error is found to exceed 0.3 percent, thereby achieving the purpose of accurate metering of the weight-reducing scale. The method adopts a mode of obtaining the calibration of the substitute on site, ensures the precision of the weight-reducing scale in the using process, has small investment and easy operation, and has great production guiding effect by taking the weight data of the trade weighing machine as a new substitute for calibrating the weight-reducing scale.
Description
Technical Field
The application belongs to the technical field of industrial measurement, and relates to a method for calibrating a weight-reducing scale in a real object mode, in particular to a method for calibrating and verifying the precision of the weight-reducing scale in the real object mode by using a substitute.
Background
The weight-reducing scale is originally widely applied to the light industrial range of plastic, chemical fiber and food industries. With the maturity and development of the weight-reducing scale technology after 2011, the weight-reducing scale is widely applied to the heavy industrial fields of cement, thermal power generation, steel mixing and the like. The precision of the weight-reducing scale is very important for the quality of finished products participating in uniform mixing. The cement content of the mixing plant is high, so that the shrinkage force of concrete is enhanced, and the cracks of buildings are caused. The low cement content can cause the strength of the concrete to be reduced. The cement proportion must be controlled in a small range. The alkalinity stability rate of the sintering machine is directly influenced by too much or too little mixing proportion of the white ash as the sintering machine ingredient, other iron materials and anthracite. The alkalinity fluctuation of the sintering machine is 0.10, which affects the coke ratio and the yield of the blast furnace in the range of 3-3.5%, and also affects the acid-base balance of the blast furnace molten iron, the removal of the molten iron S and the stability of slagging. The accuracy of the weighing data of the decrement scale has great influence on the industries such as chemical industry, civil engineering, food, steel and the like.
At present, the weight-reducing scale is fixedly installed, so that the defects of speed measurement, belt deviation, abrasion and the like are eliminated, and the precision is high. The material conveying channel is closed, is suitable for various modes of adding fine particle powder materials, can meet the requirement of environmental protection, has strong practicability and can be used in a large number of fields.
The weight-reducing scale has the following problems:
the majority of weight-reducing scales used on-line cannot be calibrated physically as specified. The reduction scale precision is reduced due to the factors of the environment for using the reduction scale, the material condensation degree, the vibration intensity times of the storage bin and the vibration of the spiral discharging system, and the production process always needs to be calibrated at any time. The quantity of standard substances in actual production is small, a plurality of large-mass standard substances are needed for calibrating one weight-reducing scale, and the weight-reducing scale cannot be calibrated in time due to the limitation of series operations of hoisting, carrying and calibrating. The precision of the weight-reducing scale is low, the added materials have great errors with the actual requirements, and the problem of the bottom error cannot be thoroughly solved. The quality components of the raw materials participating in the addition are unstable, and the product quality can not be basically ensured.
Disclosure of Invention
The invention provides a method for calibrating and verifying the precision of a weight-reducing scale by using substitutes, which compares the net weight of a material to be added in the calibration of a trade scale with the net weight of the material to be added in the weight-reducing scale for a period of time, and calibrates the weight-reducing scale by using serial substitutes at any time when the error is found to exceed 0.3 percent, thereby achieving the purpose of accurate metering of the weight-reducing scale.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a method for calibrating and verifying the precision of a decrement scale by a substitute comprises the following steps:
step A: selecting a substitute, namely selecting a calibrated substitute according to the field condition and the decrement scale range;
and B: cleaning the appearance of the selected substitute, determining a number, pasting an identifier and recording files;
and C: carrying out numerical value tracing on the selected substitute;
step D: carrying out static calibration on the decrement scale by using the substitute subjected to numerical value tracing;
step E: calibrating a single-bucket material reduction scale;
step F: and the precision of the decrement scale is verified in a production process.
The technical scheme of the invention is further improved as follows: in the step A, the substitutes comprise a large-mass series substitute and a small-mass series substitute, the number of the large-mass series substitutes is multiple, the total mass of the large-mass series substitutes is equal to the full load range of the decrement scale, and the mass error between the single large-mass series substitutes is less than 1 percent; the small-mass series substitutes are selected according to different multiples of the division value E of the decrement scale, and a plurality of small-mass series substitutes are arranged in each same multiple.
The technical scheme of the invention is further improved as follows: the number of the large-mass series substitutes is 5; the small-mass series substitutes are selected according to 2 times, 1 time, 0.5 time and 0.25 time of the division value E of the decrement scale, 4 substitutes are marked, and 3 substitutes are respectively provided for 12 substitutes.
The technical scheme of the invention is further improved as follows: in the step B, the appearance cleaning of the substitute means that rust removal and corrosion prevention treatment is carried out to prevent the weight of the substitute from changing; the determination of the number, the sticking of the identification and the recording of the file for the substitute is to manage the substitute as a standard substance and ensure that the precision of the substitute is 1-2 grades higher than that of the decrement scale.
The technical scheme of the invention is further improved as follows: and C, carrying out numerical traceability on the substitute in the step C, namely, sending the substitute into a standard mass calibrator and a calibration balance of a mass standard room to carry out verification one by one, confirming the actual mass of the substitute, and clearly recording the actual mass on a substitute equipment file and a mark.
The technical scheme of the invention is further improved as follows: the static calibration process in the step D comprises a linear increasing process, a linear decreasing process and sensitivity calibration, and specifically comprises the following steps:
stopping the operation of the decrement scale, emptying the decrement scale and accessory equipment materials, setting the decrement scale to be zero, gradually increasing and hanging the substitutes of large mass series into the decrement scale calibration support according to the numbering sequence, respectively setting the mass of the decrement scale according to the total mass of the added substitutes until the decrement scale is fully loaded, and the process is a linear increasing process;
the large-mass series substitutes are hung on a decrement scale calibration support in a reduced mode one by one according to the numbering sequence, the decrement scale is observed according to the total mass of the reduced substitutes, the mass is displayed until all the substitutes are taken down, the display numerical value of the decrement scale is equal to the zero setting value, and the process is a linear decrement process;
in the process of linear addition and linear decrement of the large-mass series substitutes, when each substitute is added/subtracted, the small-mass series substitutes are respectively added/subtracted on the large-mass series substitutes of the decrement scale one by one according to the mass sequence, the mass displayed by the decrement scale according to the total mass of the added/subtracted large-mass series substitutes and the small-mass series substitutes is observed until all the substitutes are removed, the displayed value of the decrement scale is equal to the zero setting mark, and the calibration of the sensitivity of the decrement scale in the process of linear addition and linear decrement is carried out.
The technical scheme of the invention is further improved as follows: the single-bucket material verification weight reduction scale in the step E is to statically calibrate the weight reduction scale, load several tons of materials (for example, 5 tons) into the scale bucket of the weight reduction scale, set the frequency converter of the weight reduction scale to the frequency used at ordinary times according to the process requirements, make the discharging spiral of the weight reduction scale rotate to perform discharging operation, when the weight reduction scale displays that discharging is completed (discharging is 5 tons), stop the discharging frequency converter, stop the discharging operation process of the single bucket, and thus confirm the discharging accuracy of the weight reduction scale when the single bucket materials are discharged.
The technical scheme of the invention is further improved as follows: and step F, comparing the net weight of the material in the reducing scale hopper detected by the trade weighing scale with the net weight of the material discharged by the reducing scale for a period of time, verifying the precision of the reducing scale in the production process, and calibrating the reducing scale by using a substitute at any time when the error is found to exceed 0.3 percent so as to achieve the aim of accurate metering of the reducing scale. This is the guiding idea for the user to use,
operating the decrement scale to reset the total accumulated metering data or record the total accumulated metering data, recording a calibration record, setting a decrement scale parameter adjustment password, and sealing the decrement scale operation key; then, the total mass of the warehousing materials entering the decrement scale within a period of time is called from a weighing system of the trade weighing scale; finally, the operation key of the weight-reducing scale is unlocked, and the total mass of the discharged materials of the weight-reducing scale in the same time period is checked; comparing the measurement data of the trade weighing scale and the decrement scale, and finding whether the precision of the decrement scale meets the process requirement or not at any time when the error is found to exceed 0.3%. This is the specific step.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention saves manpower, improves the operation convenience, can calibrate the weight-reducing scale in time, can verify the material object in the using process, improves the precision of the weight-reducing scale and ensures that the added materials basically accord with the actual requirements.
The present invention makes large/small mass series of substitutes according to the measuring range and field condition of the weight-reducing balance. The prepared series of substitutes are traced to the source, numbered and stored on a platform of a special house in a production field, and the precision of the standard substances completely accord with calibration and is 1 to 2 grades higher than that of a decrement scale. In actual production, the net weight data of the material weighed by the trade weighing balance is compared with the net weight data of the material dispensed by the weight reducing scale, and when the error is found to exceed 0.3%, the weight reducing scale is calibrated by using a substitute at any time, so that the aim of accurate metering of the weight reducing scale is fulfilled. The mass of the large-mass series substitutes is about 1000Kg, and the mass of the small-mass series substitutes is between 3334g and 416.75g, so that the large-mass series substitutes are convenient to operate and are made into movable devices with hoisting rings.
Drawings
FIG. 1 is a simplified static calibration of the present invention;
FIG. 2 is a schematic diagram of the magnitude traceability of the large mass series of substitutes, the small mass substitutes of the present invention;
FIG. 3 is a flow chart of the data comparison process of the trade weighing scale and the decrement scale of the present invention;
wherein: 1. the device comprises a storage bin, 2, a weighing sensor, 3, a weighing control instrument, 4, a discharge screw, 5, a vibrator, 6, a screw motor, 7, a lifting steel wire rope, 8, a large-mass series substitute, 9, a winch, 10, a fixed pulley, 11, a feeding port, 12, a blow-off valve, 13, a small-mass series substitute, 14, a standard chamber winch support, 15, a winch, 16, a standard mass calibrator, 17 and a calibration balance.
Detailed Description
The present invention will be described in further detail with reference to examples.
The invention discloses a method for calibrating a decrement scale by using a mobile substitute, which comprises the following steps with reference to figures 1-3:
step A: selecting a substitute, namely selecting a calibrated substitute according to the field condition and the decrement scale range;
and B: cleaning the appearance of the selected substitute, determining a number, pasting an identifier and recording files;
and C: carrying out numerical value tracing on the selected substitute;
step D: carrying out static calibration on the decrement scale by using the substitute subjected to numerical value tracing;
step E: calibrating a single-bucket material reduction scale;
step F: and the precision of the decrement scale is verified in a production process.
In the step A, the substitutes comprise a large-mass series substitute and a small-mass series substitute, the number of the large-mass series substitutes is multiple, the total mass of the large-mass series substitutes is equal to the full load range of the decrement scale, and the mass error between the single large-mass series substitutes is less than 1 percent; the small-mass series substitutes are selected according to different multiples of the division value E of the decrement scale, and a plurality of small-mass series substitutes are arranged in each same multiple.
Preferably, the number of large mass series substitutes is 5; the small-mass series substitutes are selected according to 2 times, 1 time, 0.5 time and 0.25 time of the division value E of the decrement scale, 4 substitutes are marked, and 3 substitutes are respectively provided for 12 substitutes.
In the step B, the appearance cleaning of the substitute means that rust removal and corrosion prevention treatment is carried out to prevent the weight of the substitute from changing; the determination of the number, the sticking of the identification and the recording of the file for the substitute is to manage the substitute as a standard substance and ensure that the precision of the substitute is 1-2 grades higher than that of the decrement scale.
And C, carrying out numerical traceability on the substitute in the step C, namely, sending the substitute into a standard mass calibrator and a calibration balance of a mass standard room to carry out verification one by one, confirming the actual mass of the substitute, and clearly recording the actual mass on a substitute equipment file and a mark.
The static calibration process in the step D comprises a linear increasing process, a linear decreasing process and sensitivity calibration, and specifically comprises the following steps:
stopping the operation of the decrement scale, emptying the decrement scale and accessory equipment materials, setting the decrement scale to be zero, gradually increasing and hanging the substitutes of large mass series into the decrement scale calibration support according to the numbering sequence, respectively setting the mass of the decrement scale according to the total mass of the added substitutes until the decrement scale is fully loaded, and the process is a linear increasing process;
the large-mass series substitutes are hung on a decrement scale calibration support in a reduced mode one by one according to the numbering sequence, the decrement scale is observed according to the total mass of the reduced substitutes, the mass is displayed until all the substitutes are taken down, the display numerical value of the decrement scale is equal to the zero setting value, and the process is a linear decrement process;
in the process of linear addition and linear decrement of the large-mass series substitutes, when each substitute is added/subtracted, the small-mass series substitutes are respectively added/subtracted on the large-mass series substitutes of the decrement scale one by one according to the mass sequence, the mass displayed by the decrement scale according to the total mass of the added/subtracted large-mass series substitutes and the small-mass series substitutes is observed until all the substitutes are removed, the displayed value of the decrement scale is equal to the zero setting mark, and the calibration of the sensitivity of the decrement scale in the process of linear addition and linear decrement is carried out.
The single-bucket material verification weight reduction scale in the step E is to statically calibrate the weight reduction scale, load several tons of materials (for example, 5 tons) into the scale bucket of the weight reduction scale, set the frequency converter of the weight reduction scale to the frequency used at ordinary times according to the process requirements, make the discharging spiral of the weight reduction scale rotate to perform discharging operation, when the weight reduction scale displays that discharging is completed (discharging is 5 tons), stop the discharging frequency converter, stop the discharging operation process of the single bucket, and thus confirm the discharging accuracy of the weight reduction scale when the single bucket materials are discharged.
And step F, comparing the net weight of the material in the reducing scale hopper detected by the trade weighing scale with the net weight of the material discharged by the reducing scale for a period of time, verifying the precision of the reducing scale in the production process, and calibrating the reducing scale by using a substitute at any time when the error is found to exceed 0.3 percent so as to achieve the aim of accurate metering of the reducing scale. This is the guiding idea.
Operating the decrement scale to reset the total accumulated metering data or record the total accumulated metering data, recording a calibration record, setting a decrement scale parameter adjustment password, and sealing the decrement scale operation key; then, the total mass of the warehousing materials entering the decrement scale within a period of time is called from a weighing system of the trade weighing scale; finally, the operation key of the weight-reducing scale is unlocked, and the total mass of the discharged materials of the weight-reducing scale in the same time period is checked; comparing the measurement data of the trade weighing scale and the decrement scale, and finding whether the precision of the decrement scale meets the process requirement or not at any time when the error is found to exceed 0.3%. This is the specific step.
Reference is now made to fig. 1-3 for a more detailed illustration.
Step A: the selection of substitutes, the selection of calibrated substitutes according to the field condition and the range of the decrement scale, the selection of trade weighing balance data in a period of time according to the production process as the data required by a new substitute, the selection of the substitutes for field calibration can be waste steel billets, steel ingots, welded iron plates and the like, and the selection can be realized only if the total mass of 5 substitutes in the large-mass series is approximately equal to the range of the full load of the decrement scale and the mass of a single substitute in the large-mass series is approximately equal (the error is within 1 percent) and meets the requirement that the mass of the substitute A is equal to the mass of the substitute B/the mass of the substitute A and is less than 1 percent.
The small-mass series substitutes are selected according to 2 times, 1 time, 0.5 time and 0.25 time of the division value of the decrement scale. In the large-mass series substitute 8 of this embodiment, 5 cubes are made from a specification iron plate of 550mm × 12mm (length × width × thickness), waste steel billets are loaded into the cubes, hoisting rings are welded on the cubes, 4 iron wheels are installed on the cubes, and the quality of the whole body after derusting, painting and drying is detected in a standard room, which is respectively as follows: 001# (998.56 Kg), 002# (997.04 Kg), 003# (1002.60 Kg), 004# (994.01 Kg) and 005# (1003.21 Kg), which meet the quality requirement of the large-mass series substitute 8 of the weight-reducing balance with the measuring range of 5 tons.
The division number of the decrement scale is 3000, the verification division E =5000Kg/3000=1667g, and the small-mass series substitutes 13 are: 1667Kg × 2=3334g for 2-fold E, 1667g for 1-fold E, 1667g × 0.5=833g for 0.5-fold E, and 1667g × 0.25=416.75g for 0.25-fold E, and there are 4 in total of 12 for each 3.
And B: cleaning, derusting and corrosion preventing treatment according to the appearance of the substitute selected according to the measuring range, determining a number, pasting an identifier and recording a file. And D, respectively cleaning the appearances of the five large-mass series substitutes 8 and the four 12 small-mass series substitutes 13 in the step A, ensuring that the substitutes are clean and free of dirt, numbering and pasting marks, and recording the equipment files of the substitutes.
And C: and carrying out numerical value tracing according to the selected substitutes of the measuring ranges.
The substitutes 8 and 13 in the large mass series are sent into a standard mass calibrator 16 and a calibration balance 17 of a mass standard room to trace the source one by one, the actual mass is confirmed, and the actual mass is clearly recorded on the device files and marks of the substitutes. The substitute after quality confirmation is used as a standard substance, damage is forbidden in the transportation process, the appearance is kept clean, and a dry ventilation space is placed to prevent the substitute from rusting to cause inaccurate quality.
Step D: and statically calibrating the decrement scale according to the selected substitute. According to the national standard requirements, the weighing control instrument 3 is utilized to start the decrement scale from zero (no material is loaded, the decrement scale sensor is free from other external force), the vibrator 5 and the spiral motor 6 are started in sequence, the internal remainders of the bin 1 and the discharge spiral 4 are emptied, and then the vibrator 5 is stopped and the spiral motor 6 is started.
Firstly, the 1# large mass series substitute 8 is moved to be arranged below the fixed pulley 10, the winch 9 is started to operate in the forward direction, the whole mass of the 1# large mass series substitute 8 acts on the weighing sensor 2, the display value of the weighing control instrument 3 is adjusted to be the same as that of the 1# large mass series substitute 8 (998.56 Kg), the winch 9 is started to operate in the reverse direction after adjustment, the 1# large mass series substitute 8 falls to the ground, and the weighing sensor 2 is set to be zero.
Secondly, moving the 2# large mass series substitute 8 below the fixed pulley 10, starting the hoisting machine 9 to run in the forward direction, enabling the 1# and 2# large mass series substitutes 8 to act on the weighing sensor 2 by the total mass, and adjusting the display value of the weighing control instrument 3, wherein the display value is added with the masses of the 1# and 2# large mass series substitutes 8: (998.56 Kg +997.04 Kg), which is input to load cell 2, is a sequential increment of mass, calibrated decrement-scale linear increment operation. And then operating the winch 9 to run in reverse, putting down the 2# large-mass series substitutes 8, and viewing the mass of the 1# large-mass series substitutes 8 displayed by the weighing control instrument 3, wherein the mass is reduced sequentially, and the calibration decrement scale is operated in a linear decrement mode. And applying the total mass of the 3#, 4#, and 5# large mass series substitutes 8 to the weighing sensor 2 according to the operation sequence, and then sequentially reducing the mass, and calibrating the linear reduction operation of the decrement scale. The process is respectively calibrated according to the mass of 20%, 40%, 60%, 80% and 100% of the measuring range, and the linearization of the weighing data of the decrement scale is ensured.
In the process of linearly increasing/decreasing the large-mass-series substitutes 8, in the process of increasing/decreasing one large-mass-series substitute 8, respectively placing the small-mass-series substitutes 13 on the large-mass-series substitutes 8 of the weight-reducing scale one by one according to the mass sequence, observing the mass displayed by the weighing control instrument 3 of the weight-reducing scale according to the total mass of the large-mass-series substitutes 8 and the small-mass-series substitutes 13, and until all the substitutes are removed, displaying the numerical value of the weight-reducing scale to be equal to the zero setting mark. This is a calibration of the decrement scale sensitivity during linear increment/decrement.
Step E: the single-bucket material is verified and reduced in weight. After static calibration decrement balance, guarantee the precision under the quiescent condition of decrement balance, the state of simulation decrement balance operation, open pan feeding mouth 11 and put into the material, diffuse valve 12 and open simultaneously, about 5 tons after the material is filled up, close pan feeding mouth 11, give material volume V ton/second at the manual settlement of central control room, screw motor 6 is rotatory, the ejection of compact spiral 4 that makes the decrement balance rotates carries out row material operation, because the range of decrement balance is 5 tons, when decrement balance shows row material 5 tons, arrange the material converter and stop the operation, the row material operation process of single fill stops, with the precision of this single fill material is verified in getting rid of.
Step F: and the precision of the decrement scale is verified in a production process. Comparing the accumulated metering data of the trade weighing scale and the discharge data of the calibrated reduction scale in the same time period of the same material in a certain period of time, and verifying that the precision of the reduction scale in the use process meets the process requirement by a real object. When the weight reducing scale is used, the weighing sensor 2 is impacted by materials to cause damage, the materials are condensed on one side of the scale bucket to cause unbalanced stress of the weighing sensor 2, and the vibrator 5 on the outer side wall of the stock bin 1 frequently vibrates, so that the weighing is inaccurate. The installation of the weighing sensor 2, the zero drift of the weighing control instrument 3 and the signal interference can also cause the inaccurate weighing. Frequent use of physical calibration by the alternative method results in increased labor costs and reduced equipment operation rates.
Therefore, in order to avoid the above drawbacks, a comparison system (fig. 3) for comparing the accumulated measurement data of the trade weighing scale and the accumulated measurement data of the decrement weighing scale within a period of time is designed, and the working process of the system is as follows: the automobile transportation material is sent to a card making chamber and then is transported to a truck scale, and the data measured by a weight measuring system is X; and then the material is discharged by the bin and is output by a decrement scale to obtain accumulated data Y. And (4) calculating and comparing in the central control room, wherein when the (X-Y)/X is less than 0.5%, the comparison result is in a reasonable range, otherwise, the comparison is continued until the requirements are met.
The system may be operated on a computer: the total accumulated data measured by the decrement scale is reset at a certain time, and the accumulated data of the decrement scale is transmitted to a central control room through a data acquisition network. The parameter adjustment password of the weight reduction scale is set on site, the operation key of the weight reduction scale is sealed and stored, various parameters and accumulated data of the weight reduction scale cannot be modified, and the weight reduction scale is prevented from being interfered by human. The weight-measuring system of the trade weighing apparatus is also led to the central control room. Therefore, the central control room can call the total mass of the material put into the warehouse of the decrement weigher and the total mass of the trade weighing weigher in any time period. And comparing the measurement data of the trade weighing scale and the weight reducing scale, and finding whether the precision of the weight reducing scale meets the process requirement at any time.
The calibration of bulk material weight-reducing scales is always an industrial problem, and the calibration by using standard weights is restricted by various factors and cannot be realized. The method selects the substitute which is in accordance with the calibration quality range according to the measuring range of the decrement scale, and the quality value of the standard substance is transferred to the substitute after the appearance cleaning number of the substitute is traced to the source by the numerical value. And then, carrying out static calibration on the weight-reducing scale by using the substitute, and dynamically calibrating the single hopper of the weight-reducing scale on the basis. Whether the decrement scale keeps the calibrated precision or not can not be confirmed in the production process, so that the system is invented after the trade weighing scale and the decrement scale material are checked and compared within a period of time, and the precision of the decrement scale in the using process is ensured. The invention adopts the mode of calibrating the substitute obtained on site, has small investment and is easy to operate. The weight data of the trade weighing scale is used as a new substitute for calibrating the decrement scale, the data is flexible and solid, and the weight data is planted on the first hand of site data to guide the production to be huge.
Claims (8)
1. A method for calibrating and verifying the precision of a decrement scale by using a substitute is characterized by comprising the following steps:
step A: selecting a substitute, namely selecting a calibrated substitute according to the field condition and the decrement scale range;
and B: cleaning the appearance of the selected substitute, determining a number, pasting an identifier and recording files;
and C: carrying out numerical value tracing on the selected substitute;
step D: carrying out static calibration on the decrement scale by using the substitute subjected to numerical value tracing;
step E: calibrating a single-bucket material reduction scale;
step F: and the precision of the decrement scale is verified in a production process.
2. The method of claim 1, wherein the method comprises the steps of: in the step A, the substitutes comprise a large-mass series substitute and a small-mass series substitute, the number of the large-mass series substitutes is multiple, the total mass of the large-mass series substitutes is equal to the full load range of the decrement scale, and the mass error between the single large-mass series substitutes is less than 1 percent; the small-mass series substitutes are selected according to different multiples of the division value E of the decrement scale, and a plurality of small-mass series substitutes are arranged in each same multiple.
3. The method of claim 2, wherein the method comprises the steps of: the number of the large-mass series substitutes is 5; the small-mass series substitutes are selected according to 2 times, 1 time, 0.5 time and 0.25 time of the division value E of the decrement scale, 4 substitutes are marked, and 3 substitutes are respectively provided for 12 substitutes.
4. The method of claim 1, wherein the method comprises the steps of: in the step B, the appearance cleaning of the substitute means that rust removal and corrosion prevention treatment is carried out to prevent the weight of the substitute from changing; the determination of the number, the sticking of the identification and the recording of the file for the substitute is to manage the substitute as a standard substance and ensure that the precision of the substitute is 1-2 grades higher than that of the decrement scale.
5. The method of claim 1, wherein the method comprises the steps of: and C, carrying out numerical traceability on the substitute in the step C, namely, sending the substitute into a standard mass calibrator and a calibration balance of a mass standard room to carry out verification one by one, confirming the actual mass of the substitute, and clearly recording the actual mass on a substitute equipment file and a mark.
6. The method of claim 3, wherein the method comprises the steps of: the static calibration process in the step D comprises a linear increasing process, a linear decreasing process and sensitivity calibration, and specifically comprises the following steps:
stopping the operation of the decrement scale, emptying the decrement scale and accessory equipment materials, setting the decrement scale to be zero, gradually increasing and hanging the substitutes of large mass series into the decrement scale calibration support according to the numbering sequence, respectively setting the mass of the decrement scale according to the total mass of the added substitutes until the decrement scale is fully loaded, and the process is a linear increasing process;
the large-mass series substitutes are hung on a decrement scale calibration support in a reduced mode one by one according to the numbering sequence, the decrement scale is observed according to the total mass of the reduced substitutes, the mass is displayed until all the substitutes are taken down, the display numerical value of the decrement scale is equal to the zero setting value, and the process is a linear decrement process;
in the process of linear addition and linear decrement of the large-mass series substitutes, when each substitute is added/subtracted, the small-mass series substitutes are respectively added/subtracted on the large-mass series substitutes of the decrement scale one by one according to the mass sequence, the mass displayed by the decrement scale according to the total mass of the added/subtracted large-mass series substitutes and the small-mass series substitutes is observed until all the substitutes are removed, the displayed value of the decrement scale is equal to the zero setting mark, and the calibration of the sensitivity of the decrement scale in the process of linear addition and linear decrement is carried out.
7. The method of claim 1, wherein the method comprises the steps of: and E, verifying the weight reducing scale by the single-hopper material in the step E, namely, after the weight reducing scale is statically calibrated, loading a plurality of tons of materials into the hopper of the weight reducing scale, setting the frequency converter of the weight reducing scale to be the frequency used at ordinary times according to the process requirements, enabling the discharging spiral of the weight reducing scale to rotate for discharging, stopping the operation of the discharging frequency converter when the weight reducing scale displays that discharging is finished, and stopping the discharging operation process of the single hopper so as to confirm the discharging precision of the weight reducing scale when the single hopper of the materials is used.
8. The method of claim 1, wherein the method comprises the steps of: and step F, comparing the net weight of the material in the reducing scale hopper detected by the trade weighing scale with the net weight of the material discharged by the reducing scale for a period of time, verifying the precision of the reducing scale in the production process, and calibrating the reducing scale by using a substitute at any time when the error is found to exceed 0.3 percent so as to achieve the aim of accurate metering of the reducing scale.
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