JP3718538B2 - Management method of supply aggregate in asphalt plant - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to the supply management of aggregate to be supplied to an aggregate storage bin of a plant body when manufacturing asphalt composite material which is a road pavement material.
[0002]
[Prior art]
The asphalt plant is configured as schematically shown in FIG. 7, and at the time of manufacturing asphalt mixture, a plurality of aggregate hoppers 1 a to 1 d storing aggregates for each type are driven to drive feeders 2 a to 2 d. The aggregate is cut out at a predetermined ratio, and the cut-out aggregate is put into a dryer 5 which is an aggregate heating device via a pull-out conveyor 3 and a weighing conveyor 4, heated to a desired temperature, and then planted by a bucket elevator 6 Lift to the top. A vibration sieve 7 is disposed in the upper part of the plant body, and aggregates are sieved by the particle diameter by the vibration sieve 7 and stored in an aggregate storage bin 8 provided with a partition inside.
[0003]
Then, the aggregates of various particle sizes stored in the aggregate storage bin 8 are appropriately discharged to the measuring tank 9, weighed in a predetermined amount, put into a mixer 10 together with other materials such as asphalt and stone powder separately measured, and mixed and adjusted. It is shipped as a predetermined asphalt mixture.
[0004]
In this case, the storage unit of the plant control panel has cut rate than the aggregate hopper 1A～1 d is previously registered in accordance with the type of asphalt mixture to ship, shipped reserved if the ship starts asphalt The cutting speed is set on the operation panel according to the type of the composite, and the aggregate is cut out from each aggregate hopper by the cutting speed.
[0005]
[Problems to be solved by the invention]
However, the operator may manually change the cutting ratio of the aggregate depending on the storage status of the aggregate storage bin of the plant body. By this operation, a large amount of aggregate is supplied to bins with a small amount of storage, and a small amount of aggregate is supplied to bins with a large amount of storage, so that excess or deficiency of the storage amount of each bin is temporarily eliminated. However, if this supply ratio is further continued, an unbalance occurs again in the storage amount of each bin. Therefore, the operator manually adjusts the cutout ratio again, but if it is an experienced operator, the cutout rate can be corrected gradually, but it can be handled appropriately. It may be possible to continue supplying unstable aggregates without being able to cope.
[0006]
In view of the above-mentioned points, the present invention outputs an alarm and successfully guides the operator's aggregate supply adjustment operation if an appropriate aggregate supply corresponding to the type of the shipping composite is not made. Supply management can be performed.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention cuts out various aggregates from a plurality of aggregate hoppers that store aggregates for each type, heat-drys them with a dryer that is a heating device, and arranges them at the upper part of the plant body. In an asphalt plant that screens by particle size with a vibrating sieve and stores by particle size in each compartment of the aggregate storage bin divided into multiple parts, it is synthesized from the particle size composition and cutting ratio of various aggregates cut out from the aggregate hopper And calculating an allowable upper limit value and an allowable lower limit value of the planned granularity composition of the synthesized aggregate determined based on the blending design , and calculating the aggregate composition of the aggregate. Comparing the allowable upper limit value and the allowable lower limit value of the planned particle size configuration with the particle size configuration of the synthesized aggregate obtained by the above calculation, the planned particle size of the aggregate obtained by synthesizing the synthesized particle size configuration the configuration of the allowed When exceeding the upper limit or the allowable lower limit value is characterized in that so as to output an alarm.
[0008]
[Action]
According to the supply aggregate management method of the present invention, when the aggregate is supplied from the aggregate hopper to the aggregate storage bin of the plant body, it is synthesized from the particle size configuration and the cutting ratio of various aggregates stored in the aggregate hopper. has been size structure of the aggregate (hereinafter, synthetic particle size hereinafter) calculates the allowable upper limit of the computed composite particle size predetermined to have synthesized granularity construction plan aggregate (hereinafter referred to as planned synthesis particle size) When the value or the allowable lower limit value is exceeded, an alarm is issued to the operator, and the operator is urged to correct the cutting ratio of the aggregate. Aggregate supply management can be performed.
[0009]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0010]
Reference numeral 11 in FIG. 1 is an operation panel of a known asphalt plant, and the operation panel 11 is provided with a composite particle size calculating means 12 for calculating the composite particle size of the aggregate. The composite granularity calculating means 12 displays a data input unit 13 for inputting various data, a storage unit 14 for storing various types of input data, a calculation unit 15 for calculating a composite granularity from various types of data, and displays the calculation results. An output display unit 16 for outputting an alarm sound is provided.
[0011]
Before the asphalt mixture is manufactured, the planned synthesis particle size is determined for each type of mixture by blending design in advance, but at this time, a certain particle size range is given from the planned synthesis particle size for each particle size. The allowable upper limit value and the allowable lower limit value are appropriately determined.
[0012]
The allowable upper limit value and the allowable lower limit value of the planned composite grain size are, for example, an example of a dense-grained composite material described in the graph of FIG. When synthesizing aggregates and stone powders of various particle sizes, these materials pass the mesh size of sieve mesh, 20mm, 13mm, 5mm, 2.5mm, 0.6mm, 0.3mm, 0.15mm, 0.074mm The weight to pass is expressed as a percentage by weight of passing, and the upper and lower allowable limits are determined in order to maintain the quality of the composite when producing this dense-grained composite, but the allowable upper limit of the present invention The value and the allowable lower limit value are appropriately determined as similar values or approximate values.
[0013]
Then, the upper limit value and lower limit value data as shown in FIG. 3 is determined for each kind of compound material to be manufactured, and is input to the composite particle size calculation means 12 through the data input unit 13 and stored in the storage unit 14. deep.
[0014]
Further, in advance by measuring the particle size configuration of the aggregate to be stored in the aggregate hopper 1A～1 d at passage weight percentages were corresponding to the mesh size of the sieve screen. An example of the passing weight percentage is shown in FIG. 4, and the mesh size, 20 mm, 13 mm, 5 mm, and 2. for each type of aggregate such as No. 6 crushed stone, No. 7 crushed stone, and river sand, similar to the planned synthetic particle size. The amount of aggregate passing through 5 mm, 0.6 mm, 0.3 mm, 0.15 mm, and 0.074 mm is calculated as a passing weight percentage.
[0015]
Since we calculate the cut rate than the aggregate hopper 1A～1 d to each type of ship mixed material from the particle size configuration of the aggregate hopper 1A～1 d, advance determine this. For example, in FIG. 4 , when the dense-grain mixture is shipped, the cutting ratios such as 34% for No. 6 crushed stone, 30% for No. 7 crushed stone, 29% for river sand, and 7% for stone powder are determined. If the aggregate is cut out from each hopper at the cutting rate, the aggregate can be supplied in accordance with the production of the dense granular material.
[0016]
Serial schedule synthesis particle size of the allowable upper limit and the allowable lower limit, the aggregate hopper 1A～1 d aggregate particle size structure of, such as cut rate of the aggregate hopper de - data input section 4 to each type of ship data mixture material And stored in advance in the composite particle size calculation means 12.
[0017]
Then, if the start of production of the asphalt mixture, cut rate corresponding to the type of the shipment mixture member is set in the operation panel is invoked from the storage unit 14, from the aggregate hopper 1A～1 d at its cut rate Each aggregate is cut out.
[0018]
And in Figure 5 if the operation start flow - Cha - as shown in bets, first, data of the particle size configuration of the aggregate hopper 1A～1 d in the synthesis particle size computing means 12 - read the data (S1), further aggregate read cut proportions of the various aggregates that are cut out from the hopper 1a~1 d (S2).
[0019]
When these data are read, the calculation unit 15 calculates the composite particle size as shown in FIG. 6 from the particle size configuration and the cut-out ratio of the aggregate hopper and displays it on the output display unit 16 (S3).
[0020]
Then, the allowable upper limit value and the allowable lower limit value corresponding to the shipping composite material type are read from the storage unit 14 from the data group of the allowable upper limit value and the allowable lower limit value of the scheduled composite particle size for each of the mixed material types stored in advance ( In S4), it is displayed on the output display unit 16 (S5), and the composite granularity obtained by calculation is compared with the allowable upper limit value and allowable lower limit value of the read scheduled composite granularity (S6). For example, the value of the composite particle size shown in FIG. 6 is compared with the upper limit value and the lower limit value of the planned composite material composite particle size shown in FIG.
[0021]
Then, it is determined whether or not the composite particle size obtained by the calculation exceeds the allowable upper limit value or the allowable lower limit value of the planned composite particle size (S7), and if it exceeds the limit value, an alarm sound is output to the output display unit 16. (S8), warning that the supply rate of the aggregate pledged supply the operator exceeds the allowable value, prompting the correction of the cut proportions of the various aggregates to be cut out from the aggregate hopper 1a~1 d. This alarm is not output when the aggregate is cut out at the cut-out ratio set in advance for each combination type, but is output when the operator changes the cut-out ratio beyond the limit value. Note that the output display unit 16 may display various data such as the current cutout ratio and the cutout ratio to be corrected as necessary so as to be a reference for correcting the operation of the operator.
[0022]
In the flow, it is determined whether or not the operation is finished (S9). If not finished, it is checked whether or not the aggregate cutout ratio (cutout amount) is changed (S10). If there is a change, the process proceeds to step S2, and the calculation of the composite granularity, the comparison with the allowable upper limit value and the lower limit value of the planned composite granularity, the determination of suitability, and the above operation are repeated.
[0023]
As described above, according to the present invention, an alarm is not output when the aggregate supply corresponding to the shipping composite is being performed, but the operator greatly changes the aggregate cutting ratio depending on the storage status of the aggregate storage bin. An alarm is output when Therefore, when changing the cut-out ratio depending on the storage status of the aggregate storage bin, correct it appropriately within the allowable range where no alarm is output, or turn off the alarm output and change the cut-out ratio significantly to store it. After the situation improves, the alarm output is turned on and correction is performed so that the cut-out ratio is within a predetermined range. As described above, when the alarm is not output, an appropriate aggregate is being supplied, and the burden on the operation of the operator is greatly reduced.
[0024]
【The invention's effect】
As described above, in the management method of the aggregate supply according to the present invention, the composite particle size is calculated from the particle size configuration and the cutting ratio of various aggregates cut out from the aggregate hopper, and the composite particle size is based on the blending design in advance. Since the warning is output when the allowable upper limit value or the allowable lower limit value of the planned composite particle size determined in the above is exceeded, an alarm is output if appropriate aggregate supply suitable for the type of shipping composite is not made. The operator can be alerted, the aggregate supply amount can be adjusted properly, and the aggregate can be supplied appropriately for the shipping mix, and the operator's operation load can be reduced. be able to.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an embodiment of an asphalt plant for explaining the present invention.
FIG. 2 is a graph showing an example of an allowable upper limit value or an allowable lower limit value of a planned synthesis granularity.
FIG. 3 is a chart showing an example of an allowable upper limit value or an allowable lower limit value of a planned synthesis granularity.
FIG. 4 is a chart showing an example of the aggregate composition of aggregates.
FIG. 5 is a flowchart showing the procedure of the supply aggregate management method of the present invention.
FIG. 6 is a chart showing an example of a composite particle size obtained by calculation.
FIG. 7 is an explanatory diagram for explaining a known asphalt plant.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a, 1b, 1c, 1d ... Aggregate hopper 5 ... Dryer 7 ... Vibrating sieve 8 ... Aggregate storage bin 11 ... Operation panel 12 ... Synthetic particle size calculation means

Claims (1)

Various aggregates are cut out from multiple aggregate hoppers that store aggregates for each type, heated and dried with a dryer, which is a heating device, and screened according to particle size using a vibrating sieve placed at the top of the plant body. In the asphalt plant that stores by particle size in each compartment of the aggregate storage bins, the particle size composition of the aggregate synthesized from the aggregate composition and the cutting ratio of various aggregates cut out from the aggregate hopper is calculated and blended The allowable upper limit value and the allowable lower limit value of the planned particle size composition of the synthesized aggregate determined based on the design are stored in advance, and the allowable upper limit value and the allowable lower limit value of the planned particle size composition of the synthesized aggregate are stored in advance. wherein comparing the synthesized and particle size structure of the aggregate obtained by the calculation, when the particle size configuration of the combined aggregate exceeding the allowable upper limit or the allowable lower limit of the particle size configuration plan aggregate synthesized from Management of the supply aggregate in asphalt plant, characterized in that so as to output the multi-address.

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