JPH0334972B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for calculating the amount of kneading in an asphalt plant that produces an asphalt mix that is a road paving material, or a ready-mixed concrete manufacturing plant that produces ready-mixed concrete.

Conventional technology Asphalt plants and ready-mixed concrete manufacturing plants are equipped with mixers with a mixing capacity commensurate with the shipping capacity of the plant, and when the shipping amount is set on the operation panel, the mixing amount per batch and the number of mixing batches are set. However, the conventional calculation method uses an equal division method in which the amount of kneading in each batch is equalized. Using this equal division method, for example, if a mixer with a rated capacity of 1000 kg is set to ship 6.5 tons, 7 batches will be kneaded with a kneading amount of 929 kg per batch.

Problems to be solved by the invention The amount of kneading per batch and the number of kneaded batches calculated from the set shipping amount are displayed on the CRT screen on the operation panel, and the number of kneaded batches is subtracted every time one batch of kneading is completed. The operator looks at this display and judges the current amount of kneading per batch and the number of remaining kneading batches. By the way, in the above example using the equal division method, 929Kg x 7 batches will be displayed on the screen, but in this equal division method, the amount of kneading per batch is a single number that is difficult for the operator to judge instantaneously. Often,
This information is difficult for operators who are monitoring a large amount of information to read. Rated capacity
If kneading is performed using a 1000Kg mixer, it is easier to read intuitively if the rated capacity of the mixer is displayed as much as possible, such as 1000Kg x 5 batches or 750Kg x 2 batches.

Means for Solving the Problems The present invention has been made in view of the above-mentioned points, and it is possible to preset the lower limit capacity of materials to be kneaded by a mixer, and to mix the materials at the rated capacity of the mixer relative to the vehicle capacity reserved for shipment. calculate the number of batches, compare the remaining non-rated kneading amount with the lower limit capacity, and if the non-rated kneading amount is less than the lower limit capacity, subtract 1 batch from the number of kneading batches at the mixer rated capacity, and calculate the non-rated kneading amount. Add the number of kneading batches by 1 batch to calculate the non-rated kneading amount again, and repeat this until the non-rated kneading amount becomes below the lower limit capacity to calculate the number of kneading batches at the mixer rated capacity,
By calculating the non-rated mixing amount and the number of mixing batches at the non-rated mixing amount, calculation processing can be performed so that the vehicle capacity reserved for shipment is mixed as much as possible at the mixer rated capacity.In asphalt and ready-mixed concrete manufacturing plants. The present invention provides a kneading amount calculation method.

Example: Products manufactured at asphalt and ready-mixed concrete manufacturing plants are transported by vehicles, so the amount shipped at one time is the capacity loaded on the vehicle (hereinafter referred to as "vehicle capacity"), and this vehicle capacity is the capacity of the mixer installed in the plant. If the capacity is below the rated capacity, it is divided into batches and kneaded. In the method of the present invention, mixing is performed at the mixer rated capacity as much as possible for the vehicle capacity reserved for shipment,
The purpose is to knead the remainder at a non-rated capacity. However, if the unrated capacity becomes too small compared to the rated capacity of the mixer, the kneading efficiency will deteriorate, so the lower limit capacity of the kneaded material to be kneaded by the mixer should be set in advance to prevent the unrated capacity from falling below the lower limit capacity. Processing calculations.

Hereinafter, the method of the present invention will be explained based on the flowchart shown in FIG. S1 to S15 indicate each step of the flowchart.

First, as an initial setting, the number N of batches to be kneaded at a non-rated capacity is set to 0 (S1). Next, the shipping reservation is determined (S7). " Next, divide the reserved vehicle capacity T (TON) by the mixer rated capacity A (Kg),
The number of batches M that can be kneaded with the rated capacity of the mixer is calculated by rounding down to the decimal point (S2), and the remainder C (Kg) of the division is calculated (S3). Determine whether the calculated remainder C is 0 or not (S4), and if C is 0, set the non-rated capacity B to 0 (S5), complete the calculation, and mix only M batches at the mixer rated capacity. (S15). Also, if the remainder C is not 0,
Assuming that the number of batches N to be kneaded at non-rated capacity is 1 (S
6) Calculated number of kneading batches M for mixer rated capacity
It is determined whether or not is 0 (S7). Here, if the kneading batch number M of the mixer rated capacity is 0, the unrated capacity B (Kg) is set as the remainder C (S8), the calculation is completed, and one batch is kneaded with the unrated capacity B. If the number M of batches to be mixed at the rated capacity of the mixer is not 0, it is further determined whether the remainder C of the division is greater than or equal to the lower limit capacity (S9). The lower limit capacity is obtained by integrating the preset lower limit capacity ratio R and the mixer rated capacity A, and if the remainder C is greater than the lower limit capacity, the non-rated capacity B is set as the remainder C (S8), and the calculation is performed. complete. If the remainder C is less than the lower limit capacity, one batch is subtracted from the number of kneading batches M at the mixer rated capacity, and one batch is added to the number N of kneading batches at the non-rated capacity (S10). By subtracting the number of kneading batches M at the mixer rated capacity A, the remainder C becomes C+A (S11), and by dividing this remainder C by the number N of kneading batches at the non-rated capacity, the non-rated capacity B is obtained. is calculated (S12). Next, it is determined whether the number of kneading batches M of the mixer rated capacity has become 0 or not (S13), and if the number of kneading batches M is 0, the calculation is completed, and if the number of kneading batches is not 0, further processing is performed. It is determined whether the non-rated capacity B is greater than or equal to the lower limit capacity (S14). If the non-rated capacity B is greater than or equal to the lower limit capacity, the calculation is completed, and if it is less than the lower limit capacity, the process returns to step S10, and the calculation is repeated until the non-rated capacity B is greater than or equal to the lower limit capacity, thereby kneading at the mixer rated capacity. The number of batches M to be kneaded, the non-rated capacity B, and the number N of batches to be kneaded using the non-rated capacity B are calculated. After the above calculation is completed, M batches are kneaded at the rated capacity and N batches are kneaded at the non-rated capacity B (S15).

Figure 2 shows the calculation results obtained by the method of the present invention when the mixer rated capacity is 1000 kg and the lower limit capacity ratio is set to 65%, and the calculation results obtained by the conventional equal division method are also included for reference.

Effects of the Invention As described above, in the present invention, the kneading information displayed on the CRT screen on the operation panel is different from that of the conventional one, since the calculation processing is performed to mix as much as possible at the rated capacity of the mixer for the vehicle capacity reserved for shipping. It is easier to read than the equal division method and can reduce the burden on the operator.

[Brief explanation of drawings]

FIG. 1 is a flowchart explaining the method of the present invention, and FIG. 2 shows the amount of kneading and the number of kneading batches according to the method of the present invention and the conventional method when the mixer rated capacity is 1000 kg.

Claims (1)

[Claims] 1. Set in advance the lower limit capacity of the material to be kneaded with the mixer, calculate the number of batches that can be kneaded with the mixer rated capacity against the vehicle capacity reserved for shipment, and compare the remaining non-rated kneading amount with the lower limit capacity, When the non-rated kneading amount is less than the lower limit capacity, the number of kneading batches at the mixer rated capacity is subtracted by 1 batch, the number of kneading batches at the non-rated kneading amount is added by 1 batch, and the non-rated kneading amount is calculated again. The asphalt is characterized in that the number of batches kneaded at the rated capacity of the mixer, the number of batches kneaded at the non-rated kneading amount, and the number of batches kneaded at the non-rated kneading amount are calculated by repeating the above steps until the non-rated kneading amount becomes equal to or higher than the lower limit capacity. , A mixing amount calculation method for a ready-mixed concrete manufacturing plant.