CN109554992B - Automatic adjusting method for cold material bin - Google Patents
Automatic adjusting method for cold material bin Download PDFInfo
- Publication number
- CN109554992B CN109554992B CN201811339129.XA CN201811339129A CN109554992B CN 109554992 B CN109554992 B CN 109554992B CN 201811339129 A CN201811339129 A CN 201811339129A CN 109554992 B CN109554992 B CN 109554992B
- Authority
- CN
- China
- Prior art keywords
- cold
- bin
- value
- level
- hot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1054—Preparing mixtures of which at least part of the solid ingredients has previously been deposited on the surface, excluding penetrating or surface dressing, e.g. in situ mixing, mixing involving lifting of spread or windrowed aggregate
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
- E01C19/1068—Supplying or proportioning the ingredients
- E01C19/1072—Supplying or proportioning the ingredients the solid ingredients
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Control Of Temperature (AREA)
Abstract
An automatic cold material bin adjusting method comprises the following steps: firstly, calibrating each cold storage bin by adopting a weighing method; secondly, calibrating the specification of the cold material bin; setting the initial frequency of a cold storage bin; fourthly, calibrating a continuous material level meter of the hot material bin and the high and low positions of the continuous material level meter; fifthly, adjusting the material level change; sixthly, adjusting the material level. The invention takes the cold material unqualified factors in the cold material bin into consideration, calculates the cold material formula through the target formula, determines the cold material bin frequency during production by adopting the relation between the total output and the cold material formula, and finally automatically adjusts the cold material formula through the bin position change of the hot material bin and the bin position height of the hot material bin, thereby solving the problem that the actual supply quantity of the cold material bin and the demand quantity of the hot material bin have deviation due to the factors of the unqualified materials in the cold material bin.
Description
Technical Field
The invention relates to the technical field of asphalt production, in particular to an automatic adjusting method of a cold material bin.
Background
Referring to fig. 11, the aggregate supply system of the asphalt mixture mixing plant is mainly composed of a plurality of cold material bins 10, an aggregate belt 20, a feeding belt 30, a heating and drying device 40, a lifter 50, a hot material bin 60 and an aggregate weighing scale 70, wherein various cold materials are respectively loaded in the plurality of cold material bins 10. At present, the adjustment of the flow rate of the cold burden of an aggregate supply system is mainly realized by adjusting the frequency of a variable frequency motor used for driving the discharge of a cold burden bin so as to adjust the rotating speed of the variable frequency motor. If the rotating speed of the variable frequency motor is reduced, the discharging amount of the cold material bin is reduced in proportion; if the rotating speed of the variable frequency motor is accelerated, the discharge amount of the cold material bin is increased in proportion.
However, because the cold materials in the cold material bin are not qualified, the large-size materials often contain the small-size materials, the bin mixing rate is not more than 50%, and along with the production, the actual supply quantity of the cold material bin and the demand quantity of the hot material bin can deviate, so that the hot material bin is short of materials or is overflowed. Therefore, the frequency and the formula linkage of the conventional simple variable-frequency motor of the cold material bin cannot meet the requirement of actual production.
Disclosure of Invention
The invention provides an automatic adjusting method of a cold material bin, and mainly aims to overcome the defects that an existing aggregate supply system is unstable, and errors between the actual supply quantity of the cold material bin and the required quantity of a hot material bin are too large easily along with production.
In order to solve the technical problems, the invention adopts the following technical scheme:
an automatic cold material bin adjusting method comprises the following steps:
firstly, calibrating each cold bin by adopting a weighing method: under the condition that n cold material bins are full, enabling a cold material motor of each cold material bin to operate for the same time under a plurality of frequencies, drying and weighing the conveyed cold materials, and obtaining a formula yn = an x n + bn of the output y and the frequency x of each cold material bin after operation;
secondly, calibrating the specification of the cold material bin: sampling, drying, screening and weighing the cold materials in each cold material bin, calculating the percentage of each cold material bin containing various hot material specifications, and representing the percentage of each cold material bin n containing the hot material specification m by CnHm;
thirdly, setting the initial frequency of the cold storage bin: firstly, the recipes of n hot material bins are respectively set as R1, R2 and … … Rn, the actual recipes of hot materials are respectively set as R1 and R2 … … Rn, and the conditions that R1: r2: … … Rn = R1: R2 ….. Rn, and R1+ R2+ … + Rn =100%, calculating to obtain an actual hot-material formula Rn = Rn/(R1+ R2+ …. + Rn); secondly, setting the total output of the cold storage bins as a certain value as total, wherein the frequency of each cold storage bin is hz1 and hz2 … … hzn; thirdly, adding an adjusting quantity for automatic adjustment during material level fluctuation in automatic production, wherein the adjusting quantity is respectively set to adj1, adj2 and … … adjn, and the adjusting quantity is controlled to be 1/n to-1/n; finally, according to the formula of yn = an × xn + bn, the frequency hzn = { [ (total × rn)/CnHn ] [ (rn + adjn ]/(1+ adj1+ adj2+ … … + adjn) -bn }/an of Coldn, hzn-1 { { [ (total { [ (rn-1) - (hzn × an + bn) { (CnHn-1 ]/Cn-1Hn-1} [ (rn-1+ adj1+ … … + adjn) -bn-1}/an-1 } ((rn-1 + adjn-1) ]/(1+ adj1+ adj2+ … … + adjn) -bn }/an-1 is calculated, by analogy, we can obtain the frequency Hz1 { [ total × r1- (hzn × an + bn) × CnH1- (hzn-1 × an-1+ bn-1) × Cn-1H1 … … - (Hz2 × a2+ b2) × C2H1] (r1+ adj 1)/(1 + adj1+ adj2+ … … + adjn) -b 1}/a1 of the Cold bin Cold 1;
fourthly, calibrating a continuous material level meter of the hot material bin: firstly, calibrating the temperature and humidity of hot materials in a hot material bin under a standard state, recording the value fed back by a continuous level indicator as an AD value, recording the AD value H when the high level is displayed as 100%, and recording the AD value L when the low level is displayed as 0%; secondly, determining an automatic calibration range e of the continuous level indicator, wherein the value range of the high-level calibration H is between H (1+ e) and H (1-e), and the value range of the low-level calibration L is between L (1+ e) and L (1-e); finally, real-time AD is compared with H at each high position of the actual production, if the AD is between H (1+ e) and H (1-e), the AD value at the moment is determined as H0 and is used as a high-position scale value, if the AD value is greater than H (1+ e), the value of H (1+ e) is determined as H0 and is used as a high-position scale value, and if the AD value is less than H (1-e), the value of H (1-e) is determined as H0 and is used as a high-position scale value; comparing the real-time AD with the real-time AD every time the AD is low, if the AD is between L (1+ e) and L (1-e), determining the AD value at the moment as L0 as a low-level scale value, if the AD value is greater than L (1+ e), determining the value of L (1+ e) as L0 as a low-level scale value, and if the AD value is less than L (1-e), determining the value of L (1-e) as L0 as a low-level scale value;
fifthly, material level change adjustment: the method comprises the steps of discharging materials in a hot material bin, detecting and recording material level A, comparing the recorded material level with the last recorded material level, recording deviation s, and sequentially obtaining s1= A1-A0, s2= A2-A1 and … … sn = An-1 by differentiating the two adjacent material levels, wherein when the position difference sn and sn-1 of two continuous materials is greater than 2% or sn-1+ sn is greater than 3%, adj of the cold material bin needs to be properly adjusted to be small, and the bin position is reduced; when the material level difference sn, sn-1<2% or sn-1+ sn <3% for two consecutive times, the adj of the cold material bin needs to be properly increased, and the bin level is increased;
sixthly, adjusting the material level: when the unloading time of the hot storage bin is too long or the metering flow is too small, or the rotation-resistant level indicator is at a low position, or the percentage of the continuous level indicator is set to be lower than 25%, the hot storage bin is indicated to be at a low position due to material shortage; when the rotation-resistant material level meter is in a high position or the percentage of the continuous material level meter is set to be higher than 75%, indicating that the flash of the hot material bin is in a high position; and calculating a weight difference wk corresponding to the 50% material level and the current material level according to the material level difference, recording the actual yield ya1 of the cold storage bin at present, then adjusting adj to-1/n or 1/n, recording the actual yield yb1 of the cold storage bin at the moment, theoretically reducing the amount yc = yb1-ya1, setting adj1 to-1/n or setting the duration of 1/n to tk = wk/yc cycle, and after tk time, adjusting adj back to the original value.
And step three, if the obtained hzn, hzn-1 and … … hz1 is larger than 50, the default is 50, and the optimal yield sumn and sumn-1 … … sum1 deduced by 50hz reaction is 0 if the optimal yield is smaller than 0.
Further, if the n cold material bins contain 50hz bins, the cold material yield does not meet the production requirement or the cold material bins are not very large in specification, and whether the sum value is used as the total yield or not is prompted, the total yield is reduced, and material overflow is prevented or material supplement meets the yield; if the n cold material bins contain bins with 0hz, the situation that the other bins contain excessive materials in the bins is shown, and at the moment, overflowing is inevitable, a user is prompted that the cold material bins are not in specifications, and overflowing materials are generated according to the formula production.
Further, when only 50hz cold storage bins are present, the actual production is less than the theoretical production total; when only the 0hz cold storage bin exists, the actual yield is greater than the theoretical yield total; when the two exist at the same time, the actual cold material output sumn needs to be recalculated according to the output and frequency yn = anxn + bn curve, the sumn and the total have a nonlinear relation, the actual cold material value obtained by taking the sumn as a theoretical value is still not the total, and the flame size of the combustor needs to be adjusted; if no 50hz or 0hz bins are present, sumn will equal total and the burner flame will not be adjusted.
Further, hot feed bin is equipped with height charge level indicator and continuous type charge level indicator, wherein, height charge level indicator adopts the formula charge level indicator that hinders soon, has the function of high low level demonstration and real-time proofreading continuous type charge level indicator regulating value.
Further, in the fourth step, the value of e is within plus or minus 10%.
Further, in the fifth step, the time of each size of material from Cold material Codl1, Cold2 ….. Coldn to Hot material Hot1, Hot2 … … Hot is t1, t2 and t3 … … tn, the production period of each disc is cycle, the production weight of each disc is P, the Hot material yield value su = P/cycle is calculated, the capacity of each Hot bin is weight1, weight2 and … … weight, the relation between the capacity weight of the Hot bin and the material level a is weight = f a, (a) when the material level difference is different from s1, the corresponding aggregate difference is w1= weight1-weight2= f (a 1) -f (a 0), and the increase of the bin is w 1/cycle.
Further, if the total time from the beginning of feeding the Cold material to the hot material in the hot material bin No. 1 is t1, the theoretical added material is t1 w1/cycle, the weight = f (a) is used for reversely deducing the material level after t1 time, the material level is calculated to be too high, a user is reminded whether to feed or overflow, then the value of adj1 in Cold1 is adjusted, the current actual yield ya1 of the Cold material bin is recorded, then adj1 is adjusted to be-1/n, at the moment, the actual yield yb1 of the Cold material bin is recorded, the theoretical reduced amount yc1= yb1-ya1, the duration of the adj1 is-1/n, the duration is determined to be tk =2t1 w1/yc cycle, the value of the adj1 is gradually increased after tk time, when the actual yield is = ya 1= ya 1-1, and then a theoretical value is obtained after a time delay curve is obtained.
Furthermore, if the metering time of the hot bin in the sixth step is greater than R × cycle/p, the hot bin is indicated to be short of materials.
Further, the metering flow of the hot bunker in the sixth step is that the weight ml of 1 and the weight ml of 2 are respectively taken between the time tl1 and the time tl2, and the shortage of the hot bunker is indicated when (ml1-ml2)/(tl1-tl2) < p/cycle.
As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:
1. the invention takes the cold material unqualified factors in the cold material bin into consideration, calculates the cold material formula through the target formula, determines the cold material bin frequency during production by adopting the relation between the total output and the cold material formula, and finally automatically adjusts the cold material formula through the bin position change of the hot material bin and the bin position height of the hot material bin. Therefore, the invention can solve the problem that the deviation occurs between the actual supply quantity of the cold storage bin and the demand quantity of the hot storage bin due to the factors of the nonstandard cold storage bin.
2. The invention does not need to adopt a belt scale, avoids errors caused by belt tension and water content of the material, and simultaneously avoids the influence of total output change on the flame size of the combustor.
Drawings
Fig. 1 is a structural block diagram of cold storage bin calibration of the present invention.
FIG. 2 is a block diagram of the cold bin specification calibration of the present invention.
Fig. 3 is a structural block diagram of the initial frequency setting of the cold silo of the invention.
FIG. 4 is a block diagram of the continuous level gauge and its high positioning calibration according to the present invention.
FIG. 5 is a block diagram of the level change and height adjustment of the present invention.
FIG. 6 is a linear relationship graph of the output after calibration of the cold box according to the present invention.
Fig. 7 is a schematic structural diagram of the hot material bin of the present invention.
Fig. 8 is a graph of the level of the hot-water bin of the present invention versus time.
FIG. 9 is a diagram of cold charge adjustment versus hot charge level change for the present invention.
FIG. 10 is a graph of adj adjustment versus hot charge level change for the present invention.
Fig. 11 is a schematic structural view of an aggregate feeding system.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth below in order to provide a thorough understanding of the present invention, but it will be apparent to those skilled in the art that the present invention may be practiced without these details. Well-known components, methods and processes are not described in detail below.
The invention provides an automatic adjusting method of a cold material bin. The method comprises the following steps that n Hot material bins are assumed to exist, the number of cold material bins and the number of Hot material bins are n, and the Hot material bins are marked as Hot1 and Hot2 … … Hotn; the Cold silo is labeled Cold1, Cold2 … … Coldn, one-to-one against the hot silo specification.
Firstly, calibrating each cold material bin by adopting a weighing method. Referring to fig. 1, under the condition that a cold material bin is full, firstly, a frequency converter of a cold material motor is controlled through a programmable controller, so that the cold material motor of each cold material bin runs for the same time under a plurality of frequencies, and conveyed cold materials are dried and weighed; the influence on the actual output of the cold material bin due to the quality deviation caused by the water content is avoided. Then correspondingly inputting the frequency of the cold material motor of each bin and the dried weight into an upper computer to obtain corresponding values of the yield and the frequency, as shown in fig. 6. The formula of the output (y) and the frequency (x) of each cold storage bin is obtained by the operation of the programmable controller, and the formula is as follows in sequence: y1= a1 × 1+ b 1; y2= a2 × 2+ b 2; … … …. yn = an x n + bn.
And secondly, calibrating the specification of the cold material bin. Referring to fig. 2, the cold materials in each cold material bin are sampled, dried, screened, weighed and input into an upper computer, and a programmable controller calculates the percentage of each cold material bin containing various hot material specifications. The percentage of Cold bin n containing Hot material specification m is represented by CnHm, for example C3H1 represents Cold3 containing Hot1 specification material.
And thirdly, setting the initial frequency of the cold material bin. Referring to fig. 3, the recipes for n hot-fill bins are set as R1, R2, … … Rn; and satisfy RI + R2+ …. + Rn < =100% (when no mineral powder is contained, and the formula sum obtained by the oilstone ratio operation is 100%), then calculate the actual hot material formula ratio R1, R2 … …. Rn, that is satisfy (R1: R2: … … Rn) = (R1: R2 ….. Rn) and R1+ R2+ … + Rn = 100%; the values of r1, r2 … …. rn are calculated according to the following formula: r1= R1/(R1+ R2+ …. + Rn), R2= R2/(R1+ R2+ …. + Rn), and … … Rn = Rn/(R1+ R2+ …. + Rn).
The specifications of the materials from Cold1 to Coldn are gradually increased, the material in Cold1 only has the material with the specification of Hot1, the material in Cold2 contains the materials with the specifications of Hot1 and Hot2, and the like, the materials with the specifications of Hot1, Hot2 and … … are contained in Coldn.
The total output of the cold storage bins is set to be total, and the frequency of each cold storage bin is hz1 and hz2 … … hzn. Because each cold material bin contains irregular materials and fluctuates, an adjusting quantity needs to be added for automatic adjustment during material level fluctuation in automatic production, and the adjusting quantity is set as adj 1; adj2, … … adjn. Because the degree of the non-specification of the storage bin is limited, and the continuous level indicator also has a level error, the regulating quantity is not too large at the moment, the regulating quantity is controlled to be 1/n to-1/n, and if 1 storage bin exists, the regulating quantity is positive or negative 1; there are 5 bins, and the adjustment is plus or minus 20%.
Because the large-specification material contains the small-specification material, only Coldn contains the material with the Hotn specification, the yield of the material with the Hotn specification is calculated, and then the Coldn frequency is calculated according to a formula of the yield and the frequency of yn = an x xn + bn.
hzn = [ (total. rn)/CnHn ] [ (rn + adjn ]/(1+ adj1+ adj2+ … … + adjn) -bn }/an, the resulting hzn, if greater than 50, defaults to 50, and the best yield sumn for Coldn is deduced again by a 50hz reverse.
Because the Hotn contains Hotn-1 specification materials. The frequency of the cold bin Coldn-1 is shown in the following equation: hzn-1 { [ (total + rn-1) - (hzn + an + bn) } CnHn-1]/Cn-1Hn-1} [ (rn-1+ adjn-1) ]/(1+ adj1+ adj2+ … … + adjn) -bn-1}/an-1, and if greater than 50, the resulting hzn-1 defaults to 50; again, the best yield sumn-1 for Coldn-1 is deduced by the 50hz back-step, and if sumn-1 is less than 0, it is defaulted to 0.
By analogy, the frequency of the Cold bin Cold1 can be obtained, as shown in the following formula: hz1 { [ total x r1- (hzn x an + bn) × CnH1- (hzn-1 x an-1+ bn-1) × Cn-1H1 … … - (hz2 x2+ b2) × C2H1] (r1+ adj 1)/(1 + adj1+ adj2+ … … + adjn) -b 1}/a1, and if the obtained hz1 is more than 50, the default is 50; the best yield sum1 for Coldn is deduced again by the 50hz reverse, and if sum1 is less than 0, it defaults to 0.
If the n cold material bins contain 50hz bins, the cold material yield does not meet the production requirement or the cold material bins are not in specifications, a user can be prompted whether to take the sum value as the total yield or not, the total yield is reduced, and material overflow is prevented or material supplement meets the yield. If the n cold material bins contain bins with 0hz, the situation that the other bins contain excessive materials in the bins is proved that the overflowing is inevitable at the moment, the user can be prompted that the cold material bins are not in specifications, and the overflowing materials are generated according to the formula production.
According to the calculated frequency, if 50hz or 0hz exists in the bin, the theoretical total output total of the cold materials and the actual total output will have errors, and when only 50hz exists, the actual output is generally smaller than the theoretical output total; when only 0hz exists, the actual yield is generally greater than the theoretical yield total; when the two exist at the same time, the actual cooling material yield sumn needs to be recalculated according to the curve of the yield and the frequency y = ax + b, the sumn and the total have a nonlinear relation, the actual value of the cooling material obtained by taking the sumn as a theoretical value is still not sumn, and the flame size of the combustor needs to be adjusted at the moment. If no 50hz or 0hz bins are present, sumn will equal total and the burner flame will not be adjusted.
The material level change of the hot material bin can be certainly caused when production is carried out at any time. Referring to fig. 7, the hot bin 60 is equipped with a continuous level gauge 61, a high level gauge 62, and a low level gauge 63. The high-level material level indicator 62 and the low-level material level indicator 63 both adopt a rotation-resistant material level indicator, have the functions of high-level and low-level display and real-time correction of the adjusting value of the continuous material level indicator, and are also provided with a thermometer 64 in the hot material bin 60.
And fourthly, calibrating the continuous material level meter of the hot material bin. Referring to fig. 4, the continuous level gauge must use continuous hot materials for the first calibration, the calibration is performed when the temperature and humidity of the hot materials in the hot material bin are in a standard state, the value fed back by the level gauge is recorded as an AD value, when the high level is displayed, the AD value is recorded as 100%, the low level is recorded as 0%, and the AD value is recorded as L. Because the continuous level indicator is greatly influenced by temperature and humidity, and the temperature and the humidity during actual production have weak changes, an automatic calibration range e of the continuous level indicator needs to be determined, wherein the value of the e is usually within plus or minus 10 percent. The high calibration ranges between H x (1+ e) and H x (1-e) and the low calibration ranges between L x (1+ e) and L x (1-e).
Comparing the real-time AD with H every time of high position, and if the AD is between H (1+ e) and H (1-e), determining the AD value at the time as H0 as a high position scale value; if the AD value is larger than H (1+ e), determining the value of H (1+ e) as H0 as a high-level scale value; if the AD value is less than H (1-e), the value of H (1-e) is determined as H0 as the high-order scale value.
Comparing the real-time AD with the real-time AD every time the AD is low, and if the AD is between L (1+ e) and L (1-e), determining the AD value at the moment as L0 as a low-order scale value; if the AD value is greater than L (1+ e), determining the value of L (1+ e) as L0 as a low-order scale value; if the AD value is less than L (1-e), the value of L (1-e) is determined as L0 as the lower scale value.
And establishing the relation among a continuous material level meter, the high position of the hot material bin, the unloading time of the hot material bin, the unloading flow of the hot material bin and the regulating quantity adj1, adj2, ….. adjn of the cold material bin.
Due to the fact that the positions of the Cold bins are different and the time of the materials with different specifications in the roller is different, the time of the materials with each specification from the Cold bin to the Hot bin is t1, t2 and t3 … … tn, the production period of each plate is cycle, the production weight of each plate is P, the Hot material yield value su = P/cycle is calculated, and the capacity of each Hot bin is weight1, weight2 and … … weight respectively.
Fifthly, adjusting the material level change of the hot material bin. Referring to fig. 5, during production, every time the hot material bin finishes discharging, the recorded material level a is detected, the recorded material level is compared with the material level recorded last time, and the recording deviation s is obtained by making difference by two continuous material levels: s1= a1-a0, s2= a2-a1, s3= A3-a2, if s1>2% and s2>2%, or s1+ s2>3%, and so on, then the cold box sdj needs to be adjusted down appropriately, as shown in fig. 8.
The relationship can be obtained by weighing aggregates at a specific material level, the relationship is set as weight = f (A), when the difference of the material level difference is s1, the corresponding difference of the aggregate weight is w1= light 1-weight2= f (A1) -f (A0), the increment of the bin is w1/cycle, taking a No. 1 hot bin as an example, the total time from feeding to finishing feeding to the hot bin is t1, and the theoretical increment of the material is t1 w 1/cycle. By weight = f (a), the level after time t1 is deduced back. And calculating the over-high material level to remind a user whether to supplement materials or overflow materials. At this time, the value of adj1 in Cold1 is adjusted, the current actual yield ya1 of the Cold silo is recorded, then adj1 is adjusted to-1/n (if s1 is a negative value, the value is adjusted to 1/n), the actual yield yb1 of the Cold silo is recorded, the theoretical reduction yc1= yb1-ya1, the duration of adj1 is-1/n, is determined to be tk =2t1 w1/yc cycle, the value of adj1 is gradually increased after tk time, when the actual yield yc1= ya1-w1/cycle, and after the time delay t1, the obtained curve is approximately the theoretical value. The cold charge adjustment value and the hot charge variation value are shown in fig. 9.
The error adjusted according to the change rate of the continuous level indicator is controlled to be about 1% of each plate, but the 1% error can still be accumulated to reach a large value after a period of time along with the time, and the level of the material level can be judged by the following three methods to adjust the adj of each bin.
Referring to fig. 5, firstly, according to the measurement time or measurement flow judgment of the hot-charging bin, when the measurement time is greater than R × cycle/p, the bin is short of charge, and meanwhile, the flow judgment can also be performed, when the measurement time is greater than R × cycle/p, the weights ml1 and ml2 are respectively taken between times tl1 and tl2, and when (ml1-ml2)/(tl1-tl2) < p/cycle, the bin is short of charge, namely, the bin is low.
And secondly, judging according to the rotation-resistant level indicator, wherein the high level is full, and the low level is low.
And thirdly, setting according to the percentage of the continuous level indicator, if the percentage is more than 75 percent, defaulting to a high level, and if the percentage is less than 25 percent, defaulting to a low level. The operation is started because the humidity and the temperature in the bin are not stable yet and cannot be detected, and the judgment is carried out after the temperature of the hot material bin is kept above 140 ℃ for 15 min.
Because the high position or the low position of the storage bin caused by the accumulation of small variables does not change adj easily, the weight difference wk corresponding to the 50% material level and the current material level can be calculated according to the material level difference. And recording the current actual output ya1 of the cold silo, then adjusting adj to-1/n (1/n if the lower position is reached), recording the actual output yb1 of the cold silo at the moment, theoretically reducing the amount yc = yb1-ya1, setting the duration of adj1 to be-1/n as tk = wk/yc cycle, and after tk time, adjusting adj back to the original value, as shown in fig. 10.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (6)
1. An automatic cold material bin adjusting method is characterized by comprising the following steps:
firstly, calibrating each cold bin by adopting a weighing method: under the condition that n cold material bins are full, enabling a cold material motor of each cold material bin to operate for the same time under a plurality of frequencies, drying and weighing the conveyed cold materials, and obtaining a formula yn = an x n + bn of the output y and the frequency x of each cold material bin after operation;
secondly, calibrating the specification of the cold material bin: sampling, drying, screening and weighing the cold materials in each cold material bin, calculating the percentage of each cold material bin containing various hot material specifications, and representing the percentage of each cold material bin n containing the hot material specification m by CnHm; the time from Cold material Codl1, Cold2 ….. Coldn to Hot material Hot1 of materials of each specification is t1, t2 and t3 … … tn of Hot material Hot2 … … Hotn, and the production period of each disc is cycle;
thirdly, setting the initial frequency of the cold storage bin: firstly, the recipes of n hot material bins are respectively set as R1, R2 and … … Rn, the actual recipes of hot materials are respectively set as R1 and R2 … … Rn, and the conditions that R1: r2: … … Rn = R1: R2 ….. Rn, and R1+ R2+ … + Rn =100%, calculating to obtain an actual hot-material formula Rn = Rn/(R1+ R2+ …. + Rn); secondly, setting the total output of the cold storage bins as a certain value as total, wherein the frequency of each cold storage bin is hz1 and hz2 … … hzn; thirdly, adding an adjusting quantity for automatic adjustment during material level fluctuation in automatic production, wherein the adjusting quantity is respectively set to adj1, adj2 and … … adjn, and the adjusting quantity is controlled to be 1/n to-1/n; finally, according to the formula of yn = an × xn + bn, the frequency hzn = { [ (total × rn)/CnHn ] [ (rn + adjn ]/(1+ adj1+ adj2+ … … + adjn) -bn }/an of Coldn, hzn-1 { { [ (total { [ (rn-1) - (hzn × an + bn) { (CnHn-1 ]/Cn-1Hn-1} [ (rn-1+ adj1+ … … + adjn) -bn-1}/an-1 } ((rn-1 + adjn-1) ]/(1+ adj1+ adj2+ … … + adjn) -bn }/an-1 is calculated, by analogy, we can obtain the frequency Hz1 { [ total × r1- (hzn × an + bn) × CnH1- (hzn-1 × an-1+ bn-1) × Cn-1H1 … … - (Hz2 × a2+ b2) × C2H1] (r1+ adj 1)/(1 + adj1+ adj2+ … … + adjn) -b 1}/a1 of the Cold bin Cold 1;
fourthly, calibrating the continuous material level meter of the hot material bin and the high and low positions thereof: firstly, calibrating the temperature and humidity of hot materials in a hot material bin under a standard state, recording the value fed back by a continuous level indicator as an AD value, recording the AD value H when the high level is displayed as 100%, and recording the AD value L when the low level is displayed as 0%; secondly, determining an automatic calibration range e of the continuous level indicator, wherein the value range of the high-level calibration H is between H (1+ e) and H (1-e), and the value range of the low-level calibration L is between L (1+ e) and L (1-e); finally, real-time AD is compared with H at each high position of the actual production, if the AD is between H (1+ e) and H (1-e), the AD value at the moment is determined as H0 and is used as a high-position scale value, if the AD value is greater than H (1+ e), the value of H (1+ e) is determined as H0 and is used as a high-position scale value, and if the AD value is less than H (1-e), the value of H (1-e) is determined as H0 and is used as a high-position scale value; comparing the real-time AD with the real-time AD every time the AD is low, if the AD is between L (1+ e) and L (1-e), determining the AD value at the moment as L0 as a low-level scale value, if the AD value is greater than L (1+ e), determining the value of L (1+ e) as L0 as a low-level scale value, and if the AD value is less than L (1-e), determining the value of L (1-e) as L0 as a low-level scale value;
fifthly, material level change adjustment: the method comprises the steps of discharging materials in a hot material bin, detecting and recording material level A, comparing the recorded material level with the last recorded material level, recording deviation s, and sequentially obtaining s1= A1-A0, s2= A2-A1 and … … sn = An-1 by differentiating the two adjacent material levels, wherein when the position difference sn and sn-1 of two continuous materials is greater than 2% or sn-1+ sn is greater than 3%, adj of the cold material bin needs to be properly adjusted to be small, and the bin position is reduced; when the material level difference sn, sn-1<2% or sn-1+ sn <3% for two consecutive times, the adj of the cold material bin needs to be properly increased, and the bin level is increased;
sixthly, adjusting the material level: when the unloading time of the hot storage bin is too long or the metering flow is too small, or the rotation-resistant level indicator is at a low position, or the percentage of the continuous level indicator is set to be lower than 25%, the hot storage bin is indicated to be at a low position due to material shortage; when the rotation-resistant material level meter is in a high position or the percentage of the continuous material level meter is set to be higher than 75%, indicating that the flash of the hot material bin is in a high position; and calculating a weight difference wk corresponding to the 50% material level and the current material level according to the material level difference, recording the actual yield ya1 of the cold storage bin at present, then adjusting adj to-1/n or 1/n, recording the actual yield yb1 of the cold storage bin at the moment, theoretically reducing the amount yc = yb1-ya1, setting adj1 to-1/n or setting the duration of 1/n to tk = wk/yc cycle, and after tk time, adjusting adj back to the original value.
2. The automatic cold burden bin adjusting method as claimed in claim 1, wherein: and step three, obtaining hzn, hzn-1 and … … hz1, if the yield is more than 50, the default is 50, and the optimal yield sumn, sumn-1 … … sum1 deduced by 50hz reaction is 0 if the yield is less than 0.
3. The automatic cold burden bin adjusting method as claimed in claim 2, wherein: if the n cold material bins contain 50hz bins, the cold material yield does not meet the production requirement or the cold material bins are not in specification, and the indication is used for indicating whether to reduce the total yield to prevent material overflow or supplement the materials to meet the yield according to the sum value as the total yield; if the n cold material bins contain bins with 0hz, the situation that the other bins contain excessive materials in the bins is shown, and at the moment, overflowing is inevitable, a user is prompted that the cold material bins are not in specifications, and overflowing materials are generated according to the formula production.
4. The automatic cold burden bin adjusting method as claimed in claim 2, wherein: when only a 50hz cold storage bin exists, the actual yield is less than the theoretical yield total; when only the 0hz cold storage bin exists, the actual yield is greater than the theoretical yield total; when the two exist at the same time, the actual cold material output sumn needs to be recalculated according to the output and frequency yn = anxn + bn curve, the sumn and the total have a nonlinear relation, the actual cold material value obtained by taking the sumn as a theoretical value is still not the total, and the flame size of the combustor needs to be adjusted; if no 50hz or 0hz bins are present, sumn will equal total and the burner flame will not be adjusted.
5. The automatic cold burden bin adjusting method as claimed in claim 1, wherein: the hot material bin is provided with a high-low material level meter and a continuous material level meter, wherein the high-low material level meter adopts a rotation-resistant material level meter and has the functions of displaying high and low levels and correcting the regulating value of the continuous material level meter in real time.
6. The automatic cold burden bin adjusting method as claimed in claim 1, wherein: and in the fourth step, the value of e is within plus or minus 10 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811339129.XA CN109554992B (en) | 2018-11-12 | 2018-11-12 | Automatic adjusting method for cold material bin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811339129.XA CN109554992B (en) | 2018-11-12 | 2018-11-12 | Automatic adjusting method for cold material bin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109554992A CN109554992A (en) | 2019-04-02 |
| CN109554992B true CN109554992B (en) | 2021-02-26 |
Family
ID=65866084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811339129.XA Active CN109554992B (en) | 2018-11-12 | 2018-11-12 | Automatic adjusting method for cold material bin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109554992B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111877090A (en) * | 2020-06-12 | 2020-11-03 | 福建省铁拓机械股份有限公司 | Powder feeding system of continuous asphalt mixture stirring equipment and control method |
| CN116927036B (en) * | 2023-09-15 | 2023-12-19 | 福建省铁拓机械股份有限公司 | Aggregate production control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4383864A (en) * | 1980-02-21 | 1983-05-17 | Riguez Associates | Adaptive mix proportioning method for use in asphaltic concrete mixing plants |
| CN101226377A (en) * | 2008-02-04 | 2008-07-23 | 南京理工大学 | Robust control method for asphalt mixing plant batching error |
| CN103726429A (en) * | 2014-01-26 | 2014-04-16 | 哈尔滨工业大学 | Method for quickly verifying production grading of hot-mixed asphalt concrete |
| CN106368103A (en) * | 2016-08-29 | 2017-02-01 | 徐州徐工筑路机械有限公司 | Secondary metering method of aggregate based on key screen |
-
2018
- 2018-11-12 CN CN201811339129.XA patent/CN109554992B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4383864A (en) * | 1980-02-21 | 1983-05-17 | Riguez Associates | Adaptive mix proportioning method for use in asphaltic concrete mixing plants |
| CN101226377A (en) * | 2008-02-04 | 2008-07-23 | 南京理工大学 | Robust control method for asphalt mixing plant batching error |
| CN103726429A (en) * | 2014-01-26 | 2014-04-16 | 哈尔滨工业大学 | Method for quickly verifying production grading of hot-mixed asphalt concrete |
| CN106368103A (en) * | 2016-08-29 | 2017-02-01 | 徐州徐工筑路机械有限公司 | Secondary metering method of aggregate based on key screen |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109554992A (en) | 2019-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109554992B (en) | Automatic adjusting method for cold material bin | |
| CN103695639B (en) | Sinter basicity inflation method | |
| CN101441445B (en) | Sintering material balance method and system | |
| CN113148594B (en) | Automatic control system and control method for flow of bulk cargo unloading hopper group at port | |
| CN101560599B (en) | Thickness control method and control system of mixed material layer | |
| CN106957953B (en) | Automatically with addition of the system and control method of red soil in a kind of sinter mixture | |
| CN112238529B (en) | Powder metering system and control method thereof | |
| CN113136466A (en) | Material distribution method for realizing graded charging of coke by using existing equipment | |
| CN115262327A (en) | Automatic adjusting system and adjusting method for asphalt mixing station flash | |
| CN115290147A (en) | Time-lag-free calculation method for discharging flow of coal storage bin gate | |
| CN108153232A (en) | A kind of automatic control system and control method to converter high hopper feeding | |
| CN116927036B (en) | Aggregate production control method | |
| KR100815443B1 (en) | Square charging apparatus for industrial Coke oven | |
| CN102549400A (en) | Method for controlling the transfer of materials | |
| JPS59229407A (en) | Method for controlling opening degree of flow regulating gate of bell-less blast furnace | |
| JP2002302707A (en) | Method for correcting influence coefficient applied into measured weight correction in parallel bunkers for bell-less blast furnace | |
| CN116334325A (en) | Weight fixed opening control method for blast furnace material flow valve | |
| US3304171A (en) | Method of controlling the operation of a blast furnace | |
| CN109489792A (en) | A kind of feed proportioning precision on-line monitoring method | |
| SU1477474A1 (en) | Method of controlling desintegrating process in a closed cycle mill | |
| CN114018382B (en) | Control method for improving weighing precision of weightless scale for batching | |
| JP3367155B2 (en) | How to adjust dry mine supply | |
| JP2005350540A (en) | Method for controlling coal charge level in coke oven | |
| CN116715038A (en) | Throughput metering device, method and system for silo on tank | |
| JP2018178165A (en) | Blast furnace operation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 362000 No.1 intelligent equipment Industrial Park, Luojiang District, Heshi Town, Luojiang District, Quanzhou City, Fujian Province Applicant after: Fujian tietuo Machinery Co., Ltd Address before: 362000 Tong Xi industrial zone, Luojiang District, Fujian, Quanzhou Applicant before: FUJIAN TIETUO MACHINERY Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |