JPH08332626A - Ready mixed concrete manufacturing device - Google Patents

Abstract

PURPOSE: To manufacture easily ready mixed concrete in compliance with the design slump value by integrating the load power value up to the point retracted by the given time from the corrected water amount decision point and computing corrected water based on the deviation value between the load power integrated value and the reference load power integral value. CONSTITUTION: When ready mixed concrete is manufactured, the load power value of a mixer is sensed every given period by a load power sensor 11 simultaneously with the start of kneading and stored in a storage section 15. When the corrected water amount decision point is reached, the load power value in the scope from the corrected amount decision point up to the kneading start point is integrated by a computation section 14, and the load power integrated value is computed, and the computed value is compared with the reference load power integral value registered preliminarily. At that time, in the case the load power integral value is larger than the reference load power integrated value, the corrected water amount is computed based on the difference of values, and a corrected water control valve 9 is on-off controlled and the shortage amount is replenished. On the other hand, in the case the load power integral value is smaller, the corrected water amount is reduced.

Description

Detailed Description of the Invention

[0001]

The present invention relates to gravel, sand, cement,
The present invention relates to a fresh concrete production apparatus for producing fresh concrete by measuring and kneading various concrete materials such as water and an admixture.

[0002]

2. Description of the Related Art Fresh concrete production equipment uses gravel,
Various concrete materials such as sand, cement, water and admixture are weighed and kneaded with a mixer to produce fresh concrete. When producing this fresh concrete, a slump value related to the quality of the fresh concrete is mixed and designed. Keeping on the street is important. For that purpose, it is necessary to measure and knead various concrete materials according to the mix design, but the surface water adheres to the aggregate of the concrete material, especially sand, and the surface water amount of the measured sand is subtracted when measuring the material. Have to measure the water. Since it is quite possible that there is variation in the surface water rate of the sand, the personnel of the test room regularly measure the surface water rate of the sand and correct the set value of the surface water rate of the sand on the operation panel. Also, the plant operator constantly checks the slump of the ready-mixed concrete to see if the desired product is completed.

Therefore, the present applicant has filed Japanese Patent Application Laid-Open No. 4-10590.
As disclosed in Japanese Patent Publication No. 7, the sand surface water ratio is set slightly higher, the sand and the kneading water are weighed, and the slump value is predicted based on the load power value of the mixer, and according to the predicted slump value. It proposes a method of adding a proper amount of water by calculating the corrected amount of water with respect to the measured amount of water.

[0004]

The method for producing ready-mixed concrete disclosed in the above publication has made it possible to sufficiently secure a predetermined amount of corrected water and a slump value. There was room for improvement in predicting the corrected water volume and slump value from the values.

In view of the above points, the present invention adopts the load power integrated value instead of the load power value to predict the corrected water amount with higher accuracy, and enables production of ready-mixed concrete with a slump value as designed. It is an object to provide a concrete manufacturing apparatus.

[0006]

In order to achieve the above object, the present invention provides an apparatus for producing fresh concrete according to claim 1, which measures various concrete materials such as gravel, sand, cement, water and admixture. In a fresh concrete manufacturing apparatus for kneading with a mixer to produce fresh concrete, a load power value storage means for sequentially detecting and storing a load power value of a driving motor for the mixer and a predetermined time from the correction water amount determination time A load power value integrating means for integrating the load power value for the range up to the time point, a load power integrated value calculated by the load power value integrating means and a reference load power integrated value registered in advance are compared, and the difference amount is calculated. It is characterized by comprising a correction water calculating means for calculating the correction water based on the above.

Further, the fresh concrete producing apparatus according to claim 2 is a fresh concrete producing apparatus for producing various types of concrete by measuring various concrete materials such as gravel, sand, cement, water and admixture and kneading them with a mixer. A load power value storage means for sequentially detecting and storing the load power value of the mixer driving motor, and a load for integrating the load power value in a range from a slump determination time before the completion of kneading to a time point traced back for a predetermined time. It is characterized in that it is provided with a power integrating means and a slump value predicting means for predicting a slump value from the load power integrated value calculated by the load power value integrating means and the reference load power integrated value registered in advance.

The apparatus for producing ready-mixed concrete according to claim 3 is an apparatus for producing ready-mixed concrete for measuring various concrete materials such as gravel, sand, cement, water and admixture and kneading them with a mixer to produce ready-mixed concrete. A load power value detection means for sequentially detecting a load power value of the mixer driving motor, and a load power display means for sequentially displaying a load power value sequentially detected by the load power value detection means as a tachograph on a screen. It is characterized by having and.

[0009]

According to the apparatus for producing ready-mixed concrete according to claim 1 of the present invention, a correction water amount determination time point for determining the amount of correction water to be added is set at a time point when a predetermined time has elapsed since the kneading start time, and the mixer is started at the same time when the kneading is started. The load power value is sequentially detected and stored in the load power value storage means, and when the preset correction water amount determination time is reached with the progress of kneading, the load power integration means traces back a predetermined time from the correction water amount determination time. For the range up to the time point, the load power value stored and accumulated previously is integrated to calculate the load power integrated value. Then, the corrected water amount calculation means compares the load power integrated value with the reference load power integrated value registered in advance, and calculates the corrected water amount based on the difference amount.

As described above, the correction water amount is predicted from the integrated value of the load power values in the predetermined range, and the correction water amount is predicted from one point where the load power value fluctuates as in the conventional case or the average value. On the other hand, it can be expected that the prediction accuracy of the corrected water volume will be much improved.

According to the ready-mixed concrete manufacturing apparatus of the second aspect, the slump prediction time is set in advance before the completion of the kneading, and the load power value of the mixer is sequentially detected at the start of the kneading to be stored in the load power value storage means. Stored and accumulated, and when the preset slump prediction time is reached with the progress of kneading, the load power integration means integrates the load power value previously stored and accumulated in a range from the slump prediction time back to a predetermined time. Calculate the load power integral value. Then, the slump value predicting means compares the load power integrated value with a reference load power integrated value registered in advance, and predicts the slump value based on the difference value amount.

As described above, by predicting the slump value from the integrated value of the load power value in the predetermined range, it is expected that the accuracy of the slump value prediction is improved.

Further, according to the ready-mixed concrete manufacturing apparatus of claim 3, the load power value of the mixer during kneading, which is sequentially detected by the load power value detecting means, is sequentially displayed on the tachograph by the load power value displaying means. Causes the load power value to be displayed in a substantially circular shape along the time axis in the circumferential direction, starting from the intersection point of the scale for reading the load power formed in vertical and horizontal ten characters, and from the intersection point of the circumferential position and the scale. It is possible to easily read the situation of the change over time of the load power value by the distance in the radial direction.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a mixer for kneading various concrete materials, in which a kneading blade 2 disposed inside is rotated by a mixer driving motor 3 at a predetermined speed. Above the mixer 1, various measuring tanks (not shown) for gravel, cement, etc. and a water measuring tank 5 supported by a weight detector 4 are arranged. A water tank 6 is disposed above the water metering tank 5, and a main drain pipe 8 having a water metering valve 7 is provided at the lower part of the water tank 6, and a branch from the main drain pipe 8 is provided for correction water control. An auxiliary drain pipe 10 having a valve 9 is arranged.

Then, a predetermined amount of water discharged by controlling the opening / closing of the water metering valve 7 is metered in the water metering tank 5 and fed into the mixer 1 as kneading water. By controlling the opening and closing, a predetermined amount can be put into the mixer 1.

A load power detector 11 for detecting the load power value (or load current value) of the motor is connected to the driving motor 3 of the mixer 1, and the signal detected by the load power detector 11 is the metering water. It is input to the correction device 12.

The metered water correction device 12 comprises a control unit 13, a calculation unit 14 for calculating various input signals and data, a storage unit 15 for storing various data, and a display unit 16 for displaying various data. .

Further, the measured water correction device 12 is connected to the operation panel 17, and the measured water correction device 12 outputs various data and signals such as the current kneading amount, the compound number and the measurement start signal output from the operation panel 17. I am supposed to receive it.

Next, a method of correcting the metered water and a method of predicting the slump value by the metered water correcting device will be described.

FIG. 2 is a line graph showing the load power value of the mixer on the vertical axis and the kneading time on the horizontal axis, and showing the change in the load power value with the passage of the kneading time of the mixer.

Then, a correction water amount determination time point at which the correction water amount is determined with respect to the progress of kneading and a slump value prediction time point for predicting the slump value are set in advance for each mixture.

The correction water amount determination time may be set appropriately depending on the type of ready-mixed concrete, the size of the aggregate, etc., such as when the kneading enters a stable period such as point A or when the kneading enters a certain stable period such as point B. You can choose. Further, the slump value prediction time is set to a time point when the kneading before the completion of kneading is stable, such as point C.

First, the case of correcting the measured water will be described. Mixing raw concrete as a reference for each product type with a mixer, and starting from the start of kneading in FIG. 2 to the point A or from the point A to the point B. The reference load power value is detected by the load power detector 11 at regular intervals and stored in the storage unit 15 of the metered water correction device 12, which is load power storage means.
When the corrected water amount determination time is reached with the progress of kneading,
When the point A is the correction water amount determination time point, the load power value between the point A and the kneading start time is integrated by the calculation unit 14 which is the load power integration means, and the result is stored as the reference load power integration value in the storage unit. Register in 15. When point B is the correction water amount determination time point, the load power value between points B and A is integrated to obtain the reference load power integrated value.

This operation of registering the integrated value of the reference load power may be carried out by a test kneading before starting the operation of the apparatus, or when the kneading data suitable for the reference value is obtained during the usual kneading, the data is taken as the reference value. You may register.

During the production of ready-mixed concrete, the amount of water to be weighed is set slightly higher in advance on the operation panel 17 so that the calculated amount of water to be weighed is slightly less than the standard mixture value. Simultaneously with the start of kneading, the load power detector 11 detects the load power value of the mixer at regular intervals and stores it in the storage unit 15. When the corrected water amount determination time point is reached as the kneading progresses, if the corrected water amount determination time point is point A, the load power value in the range from point A to the kneading start time point is calculated. If the corrected water amount determination time point is point B, the load power value is calculated from point B to point A. The load power value in the range up to the point is integrated by the calculation unit 14 to calculate the load power integrated value, and the load power integrated value and that of the type corresponding to the reference load power integrated value registered in advance for each type Compare.

At this time, when the integrated value of the load power is larger than the integrated value of the reference load power, it means that a large amount of load is applied to the standard kneading state and the kneading state is established. The calculation unit 14 which is the correction water calculation unit calculates the correction water amount based on the difference amount of the load power integrated value and controls the opening / closing of the correction water control valve 9 to replenish the shortage.

Further, when the load power integral value is smaller than the reference load power integral value, it is necessary to reduce the correction water amount contrary to the above, but this will be corrected in the next batch.

Next, the method of predicting the slump value will be described. In this case as well, as in the case of the correction of the measured water,
Mixing standard concrete for each type with a mixer, a load power value in the range from the point slump value prediction point C in FIG. It is detected for each and stored in the storage unit 15. When the slump determination time point C is reached as the kneading progresses, the load power value in the range from the point C to the point B is integrated to calculate the reference load power integrated value, and the reference load power integrated value is set as the reference slump value. It is registered in the storage unit 15 as the correlation data of.

The registration of the reference power integral value may be carried out by test kneading as in the above case, or may be registered at the time when data suitable for the reference value is obtained in the usual production of ready-mixed concrete. .

During the production of the ready-mixed concrete, the load power detector 11 detects the load power value in a range from the point C of the slump value prediction of FIG. The load power value in this range stored when the time point C is reached is calculated by the calculation unit 1
The integrated value of the load power is calculated by integrating by 4. The slump value during kneading is predicted by the calculation unit 14 serving as a slump value predicting means, based on the load power integrated value, the correlation data of the reference load power integrated value and the reference slump value registered in advance.

By adopting the integrated value of the load electric power in this way, the load electric power value which constantly changes due to the influence of the rotation of the kneading blades and the stirring of the aggregate is not caught at one point, and the load electric power value of the predetermined range can be obtained. It can be regarded as the sum of the load power values, and the determination accuracy for load fluctuations can be improved. In addition, when the correction water amount is calculated from the integrated value of the load power or when the slump value is determined, the inference means based on the fuzzy theory is used, which also contributes to the improvement of the determination accuracy.

Further, FIG. 3 shows an example in which the change in the load power value of the mixer is displayed as a tachograph on the screen of the display unit 16 of the water metering device 12.

Explaining this graph, a scale engraved with the scale of the load power value is crossed in the vertical and horizontal ten characters near the center of the screen, and the circumference around the intersection of this scale is the elapsed time. Then, as in the tachograph, the load power value of the mixer is displayed as if to draw a circle with the cross point of the scale as the starting point and the radial distance from the cross point of the scale as the load power value, as shown in the tachograph. I am trying to do it.

Further, as shown in FIG. 3, among the display of the load power value, the thin line may be the reference load power value and the thick line may be the load power value. Further, in the figure, the one-dot chain line indicates the above-mentioned corrected water amount determination time point, and the position can be set appropriately for each blending starting from the start of kneading.

Further, on the right side of the screen, the slump estimated to be the load power detected by the load power detector 11 and the kind data such as the compound number and strength received from the operation panel 17, the slump, the aggregate diameter, and the kneading amount. The value of is displayed numerically.

[0037]

As described above, according to the ready-mixed concrete manufacturing apparatus according to the first aspect of the present invention, the load power value storage means for storing the load power value of the mixer sequentially detected and the predetermined time from the correction water amount determination time point. Load power value integrating means for integrating the load power value up to the point of time traced back, comparing the load power integrated value calculated by the load power value integrating means with a reference load power integrated value registered in advance, and based on the difference value amount. Since the correction water calculating means for calculating the correction water is provided, the correction water amount can be calculated by the load power integral value of the mixer, and the correction water amount can be calculated more accurately than the conventional calculation by the load power value. Therefore, it is expected that ready-mixed concrete having a slump value as designed can be easily manufactured even by a skilled operator.

Further, according to the ready-mixed concrete manufacturing apparatus of the second aspect of the present invention, the load power value storage means for storing the load power value of the mixer sequentially detected and the predetermined time from the slump determination time before the completion of the kneading are traced. Load power integration means for integrating the load power value up to a time point, and slump value prediction means for predicting the slump value from the load power integration value calculated by the load power value integration means and the reference load power integration value registered in advance. Since it is equipped with a mixer, it is possible to predict the slump value by the load power integrated value of the mixer, and it is possible to predict the slump value more accurately than the conventional load power value. Even without it, it can be expected that the condition of ready-made concrete will be easily grasped.

According to the ready-mixed concrete manufacturing apparatus of the third aspect of the present invention, the load power value detecting means for sequentially detecting the load power value of the mixer and the detected load power value are sequentially displayed on the tachograph. Since the load power value display means is provided, the load power value is displayed in a substantially circular shape along the circumferential direction, which is the time axis, starting from the intersection of the scale for load power formed in the vertical and horizontal crosswise. It can be expected that the situation of changes in values over time can be easily read.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a main part of a ready-mixed concrete manufacturing apparatus adopting the present invention.

FIG. 2 is a graph showing a load power value of a mixer with respect to an elapsed time of kneading.

FIG. 3 is an example of a graph showing the load power value of the mixer with respect to the kneading elapsed time of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mixer 3 ... Mixer drive motor 4 ... Weight detector 5 ... Water metering tank 11 ... Load electric power detector 12 ... Metering water correction device 13 ... Control part 14 ... Calculation part 15 ... Storage part 16 ... Display part 17 ... Operation Board

Claims (3)

[Claims] 1. A raw concrete manufacturing apparatus for measuring various concrete materials such as gravel, sand, cement, water, and an admixture and kneading them with a mixer to produce green concrete, and a load power value of a motor for driving the mixer. Is sequentially detected and stored, a load power value integrating means for integrating the load power value in a range from the correction water amount determination time point to a time point traced back by a predetermined time, and the load power value integration means 2. A ready-mixed concrete manufacturing apparatus, comprising: a correction water calculating means for comparing the load power integrated value and the reference load power integrated value registered in advance and calculating the correction water based on the difference value amount. 2. A fresh concrete manufacturing apparatus for measuring various concrete materials such as gravel, sand, cement, water, and an admixture, and kneading them with a mixer to produce fresh concrete. The load power value of a motor for driving the mixer. A load power value storage means for sequentially detecting and storing the load power value, a load power value integration means for integrating the load power value in a range from a slump determination time before the completion of kneading to a time point traced back by a predetermined time, and the load power value integration means. An apparatus for producing fresh concrete, comprising: a slump value predicting means for predicting a slump value from a load power integrated value calculated by the above and a reference load power integrated value registered in advance. 3. A raw concrete manufacturing apparatus for measuring various concrete materials such as gravel, sand, cement, water, and an admixture and kneading them with a mixer to produce green concrete, and a load power value of a motor for driving the mixer. The ready-mixed concrete is provided with load power value detection means for sequentially detecting the load power value and load power value display means for sequentially displaying the load power value sequentially detected by the load power value detection means as a tachograph on the screen. Manufacturing equipment.