Production facility of fresh concrete and temperature control method in production process of fresh concrete

Abstract

PURPOSE: To provide a production facility of fresh concrete capable of producing fresh concrete in a state in which respective materials are efficiently and surely cooled or heated, and a temperature control method in a production process of fresh concrete.CONSTITUTION: A production facility of fresh concrete is configured by disposing a Peltier element in a surface contact state on respective surfaces of a coarse aggregate storage bin, a fine aggregate storage bin, and a cement storage bin of the production facility of fresh concrete and taking a side of the respective surfaces with which the Peltier element comes into surface-contact as a cooling surface or a heating surface. A temperature control method in a production process of fresh concrete is configured by cooling or heating the respective surfaces and controlling respective temperatures of the coarse aggregate stored in the coarse aggregate material bin, the fine aggregate stored in the fine aggregate storage bin, and the cement stored in the cement storage bin, by supplying power to the Peltier element so as to take the side of the respective surfaces with which the Peltier element comes into surface-contact as the cooling surface or the heating surface.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a manufacturing facility for fresh concrete and a temperature control method in the manufacturing process of fresh concrete. More specifically, the present invention relates to a technique that enables manufacturing in a temperature-controlled state in a fresh concrete manufacturing facility having a batcher plant and various silos.

Background Art

[0002] After fresh concrete is manufactured in a manufacturing facility such as a batcher plant, it is transferred to a large concrete structure such as a dam, or loaded onto an agitator truck and transferred to the site. During this transfer, if the temperature of the fresh concrete rises above the specified value due to high temperatures and direct sunlight in hot weather, or the heat of hydration of the fresh concrete itself, there is a risk of quality deterioration. Fresh concrete manufactured within the specified range defined by JIS (Japanese Industrial Standards), the Japan Society of Civil Engineers, the Architectural Institute of Japan, etc. has an allowable time from mixing to completion of placement of within 2.0 hours when the average daily temperature is 25°C or lower, and within 1.5 hours when it exceeds 25°C. The allowable time from mixing to arrival at the unloading point is within 1.5 hours regardless of the outside air temperature. Also, the concrete temperature at the time of placement is 35°C or lower.

[0003] The relative relationship between the temperature change of the materials and the temperature change of the fresh concrete is generally said to be that for a temperature change of ±8°C for cement, ±4°C for water, and ±2°C for aggregates, the temperature change of the fresh concrete is ±1°C. If the temperature of the fresh concrete rises due to the temperature rise of the materials caused by direct sunlight or high outside air temperature or the heat of hydration during the transfer to the placement site and before the start of placement, and the temperature exceeds the specified range defined by JIS etc., there will be a problem that the risk of defects such as cold joint occurrence increases.

[0004] Therefore, a technique for cooling each material is known in the manufacture of fresh concrete. For example, regarding coarse aggregates and fine aggregates, techniques such as dry ice mixing and cooling, cooling with cold water or mist, cooling with cold air or liquid nitrogen, and vacuum cooling are known. Regarding water, techniques such as cooling by a chiller are known. Regarding cement, techniques such as adding ice before adding aggregates and mixing and cooling (Patent Document 1), and blowing cold air into the cement in a screw conveyor to cool it (Patent Document 2), etc. are known.

[0005] Also, when mixing and kneading each material, techniques such as directly injecting liquid nitrogen into the fresh concrete during kneading to cool it, and mixing ice particles into the fresh concrete during kneading to cool it, etc. are also known.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, among the above cooling techniques, for those that directly inject cold water, ice, ice particles, dry ice, etc. into each material, not only is it necessary to estimate in advance the amount of cold water, ice, etc. that can obtain a necessary and sufficient cooling effect from the air temperature and the temperature of each material and then inject it, but also the difference between the moisture content of this cooling ice, etc. and the moisture content that should originally be added needs to be calculated in advance, and the differential water must be added when kneading and mixing each material. Therefore, there is a problem that the water addition operation is time-consuming and complicated. Also, for those that blow cold air into a screw conveyor, there is a problem that the cooling effect is insufficient when cooling the material that has become high temperature only for a short time during conveyor transfer in extremely hot seasons such as midsummer by simply blowing cold air on it.

[0008] Therefore, an object of the present invention is to provide a fresh concrete manufacturing facility capable of manufacturing fresh concrete while efficiently and surely cooling or heating each material, and a temperature control method in the fresh concrete manufacturing process.

Means for Solving the Problems

[0009] The present invention for solving the above problems has the following configuration.

[0010] 1. A fresh concrete manufacturing facility, characterized in that Peltier elements are disposed in surface contact on each surface of a coarse aggregate storage bottle, a fine aggregate storage bottle, and a cement storage bottle in the fresh concrete manufacturing facility, and the side in surface contact with each surface is a cooling surface or a heating surface.

[0011] 2. The fresh concrete manufacturing facility according to 1 above, characterized in that Peltier elements are disposed in surface contact on each surface of a coarse aggregate measuring bottle, a fine aggregate measuring bottle, a cement measuring bottle, a water measuring bottle, and an admixture measuring bottle, and the side in surface contact with each surface is a cooling surface or a heating surface.

[0012] 3. The fresh concrete manufacturing facility according to 1 or 2 above, characterized in that Peltier elements are disposed in surface contact on the surface of a mixer tank for kneading and mixing coarse aggregate, fine aggregate, cement, water, and admixture measured by each measuring bottle, and the side in surface contact with the surface is a cooling surface or a heating surface.

[0013] 4. The fresh concrete manufacturing facility according to 3 above, characterized by having a measuring unit for measuring the temperature of each of coarse aggregate, fine aggregate, cement, water, and admixture, and a control unit for controlling power supply to the Peltier element based on the temperature of each material measured by each measuring unit.

[0014] 5. The fresh concrete manufacturing facility according to 1 or 2 above, characterized in that by changing the polarity of the Peltier element, the side in surface contact with each surface side is a cooling surface in hot weather and a heating surface in cold weather.

[0015] 6. By changing the polarity of the Peltier element, the side in surface contact with each surface side serves as a cooling surface in hot weather and a heating surface in cold weather. The manufacturing equipment for fresh concrete according to item 3 above is characterized by this configuration.

[0016] 7. A Peltier element is disposed in surface contact on one or more surfaces of the aggregate storage silo, cement silo, water tank, or admixture tank, and the side in surface contact with the surface is configured as a cooling surface or a heating surface. The manufacturing equipment for fresh concrete according to item 1 above is characterized by this configuration.

[0017] 8. A Peltier element is disposed in surface contact on one or more surfaces of the transfer means for transferring coarse aggregate and fine aggregate from the aggregate storage silo into the batching plant, the transfer means for transferring cement from the cement silo into the batching plant, the transfer means for transferring water from the water tank into the batching plant, or the transfer means for transferring the admixture from the admixture tank into the batching plant, and the side in surface contact with each surface is configured as a cooling surface or a heating surface. The manufacturing equipment for fresh concrete according to item 1 above is characterized by this configuration.

[0018] 9. In the fresh concrete manufacturing equipment, Peltier elements are disposed in surface contact on the surfaces of each of the coarse aggregate storage bottle, fine aggregate storage bottle, and cement storage bottle, and the Peltier elements are powered so that the side in surface contact with each surface of the Peltier element becomes a cooling surface or a heating surface, thereby cooling or heating each surface, and controlling the temperatures of the coarse aggregate stored in the coarse aggregate storage bottle, the fine aggregate stored in the fine aggregate storage bottle, and the cement stored in the cement storage bottle. A temperature control method in the manufacturing process of fresh concrete is characterized by this configuration.

[0019] 10. A Peltier element is disposed in surface contact with each of the surfaces of the coarse aggregate measuring bottle, the fine aggregate measuring bottle, the cement measuring bottle, the water measuring bottle, and the admixture measuring bottle, and power is supplied to the Peltier element so that the side in surface contact with each surface thereof becomes a cooling surface or a heating surface, thereby cooling or heating each surface, and controlling the temperature of the coarse aggregate measured in the coarse aggregate measuring bottle, the fine aggregate measured in the fine aggregate measuring bottle, the cement measured in the cement measuring bottle, the water measured in the water measuring bottle, and the admixture measured in the admixture measuring bottle. The temperature control method in the fresh concrete manufacturing process according to 9 above, characterized in that it is configured as such.

[0020] 11. A Peltier element is disposed in surface contact with the surface of the mixer tank for kneading the coarse aggregate, fine aggregate, cement, water, and admixture measured by each measuring bottle, and power is supplied to the Peltier element so that the side in surface contact with the surface becomes a cooling surface or a heating surface, thereby controlling the temperature of the fresh concrete produced by kneading in the mixer tank. The temperature control method in the fresh concrete manufacturing process according to 9 or 10 above, characterized in that it is configured as such.

[0021] 12. The temperature control method in the fresh concrete manufacturing process according to 9 or 10 above, characterized in that it is configured to cool when the daily average temperature exceeds 25°C.

[0022] 13. The temperature control method in the fresh concrete manufacturing process according to 9 or 10 above, characterized in that it is configured to heat when the daily average temperature is 4°C or less.

[0023] 14. A temperature control method in the manufacturing process of fresh concrete according to claim 9, characterized in that a Peltier element is disposed in surface contact on one or more surfaces of an aggregate storage silo, a cement silo, a water tank, or an admixture tank, and power is supplied to the Peltier element so that the side in surface contact with each surface of the Peltier element becomes a cooling surface or a heating surface, thereby cooling or heating each surface, and controlling the temperatures of the coarse aggregate and fine aggregate stored in the aggregate storage silo, the cement stored in the cement silo, the water stored in the water tank, and the admixture stored in the admixture tank.

[0024] 15. A temperature control method in the manufacturing process of fresh concrete according to claim 9, characterized in that a Peltier element is disposed in surface contact on one or more surfaces of transfer means for transferring coarse aggregate and fine aggregate from an aggregate storage silo into a batching plant, transfer means for transferring cement from a cement silo into a batching plant, transfer means for transferring water from a water tank into a batching plant, or transfer means for transferring an admixture from an admixture tank into a batching plant, and each surface is cooled or heated to control the temperatures of the coarse aggregate and fine aggregate, cement, water, and admixture being transferred from each of the aggregate storage silo, cement silo, water tank, and admixture tank into the batching plant.

Advantages of the Invention

[0025] According to the invention shown in claim 1 or 9, it is possible to provide a manufacturing facility for fresh concrete and a temperature control method in the manufacturing process of fresh concrete, which can manufacture fresh concrete in a state where each material is efficiently and reliably cooled or heated.

[0026] In particular, by disposing a Peltier element in surface contact on the surface of the storage bottle of each material, it is possible to cool or heat each internal material through the storage bottle, so that it can be applied extremely easily and at low cost without significantly modifying the existing manufacturing facility for fresh concrete. There is no need for a refrigerant storage tank and cooling or refrigeration equipment, which are essential in the case of a cooling mode using a refrigerant such as water or ice. In addition, since the Peltier element has good temperature responsiveness, it can start cooling or heating promptly.

[0027] According to the invention described in claim 2 or 10, each material already in a cooled or heated state in the storage bottle is transferred to a measuring bottle for weighing, and is further cooled or heated in each measuring bottle cooled or heated by the Peltier element. Therefore, each material can surely maintain a cooled or heated state.

[0028] According to the invention described in claim 3 or 11, each material already in a cooled or heated state is kneaded in a mixer tank cooled or heated by the Peltier element. Therefore, in the midsummer period, it can be kneaded while being suppressed from overheating due to the heat generated by the hydration reaction, and in the midwinter period, it can be kneaded in a state heated to a temperature at which the hydration reaction is likely to occur.

[0029] According to the invention described in claim 4, cooling or heating by the Peltier element can be controlled based on the measured temperature by the measuring unit.

[0030] According to the invention described in claim 5, by changing the polarity of the Peltier element, it can be cooled in summer and heated in winter. Therefore, it is possible to store each material in a state controlled to an appropriate temperature range throughout the year, or to perform three weighings from storage.

[0031] According to the invention described in claim 6, by changing the polarity of the Peltier element, it can be cooled in summer and heated in winter. Therefore, it is possible to knead in a state maintained at an appropriate temperature range throughout the year.

[0032] According to the invention described in claim 7 or 14, the raw materials stored in each of the aggregate storage silo, cement silo, water tank, and admixture tank can be cooled or heated to control them to an appropriate temperature range.

[0033] According to the invention described in claim 8 or 15, the raw materials being transferred from each of the aggregate storage silo, cement silo, water tank, and admixture tank into the batching plant can be controlled to an appropriate temperature range by cooling or heating them.

[0034] According to the invention described in claim 12, in the hot season when the average daily temperature exceeds 25°C, each material can be pre-cooled before mixing.

[0035] According to the invention described in claim 13, in the cold season when the average daily temperature is below 4°C, each material can be pre-heated before mixing.

Brief Description of the Drawings

[0036]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0037] Hereinafter, the fresh concrete manufacturing equipment according to the present invention and the temperature control method in the fresh concrete manufacturing process (hereinafter, may be simply referred to as manufacturing equipment and temperature control method) will be described.

[0038] As described above, fresh concrete manufactured within the specified quality ranges defined by JIS (Japanese Industrial Standards), the Japan Society of Civil Engineers, the Architectural Institute of Japan, etc. should have an allowable time from mixing to completion of placement within 2.0 hours when the average daily temperature is 25°C or lower, and within 1.5 hours when it exceeds 25°C. The allowable time from mixing to arrival at the unloading point should be within 1.5 hours regardless of the outside air temperature. Also, the concrete temperature during placement should be 35°C or lower.

[0039] If the average daily temperature is less than 25°C, there is no special need to adjust the temperature of the fresh concrete during transportation by agitator truck. Just pay attention to the curing after placement. However, in hot weather when the average daily temperature is 25°C or higher, not only the outside air temperature but also the direct sunlight causes the temperature of the agitator truck drum to rise. The heat from this heated drum is directly transferred to the internal fresh concrete, causing the temperature to rise and resulting in a quality decline.

[0040] To prevent quality decline in hot weather, it is important to keep the fresh concrete in a cooled state at the time of loading onto the agitator truck, that is, at the time of production in the manufacturing facility, so that the temperature of the fresh concrete in the agitator truck drum can be maintained at 35°C or lower until the end of transportation.

[0041] Hereinafter, the manufacturing facility and temperature control method of the present invention will be described based on the attached FIGS. 1 to 6.

[0042] First, the manufacturing facility to which the present invention is applied will be described. As mainly shown in FIG. 1, the manufacturing facility includes an aggregate storage silo 2, a cement silo 4, a water tank 6, and an admixture tank 8 for storing various raw materials, namely, various aggregates (fine aggregates, coarse aggregates, etc.), various cements, water, and various admixtures, and a batcher plant (sometimes referred to as a batching plant, mixing plant, etc.) 1 for mixing each raw material to produce fresh concrete, Transfer means (belt conveyors, pressure pipes, transfer pipes, etc.) 3, 5, 7, 9 for transferring each raw material stored in each of the aggregate storage silo 2, cement silo 4, water tank 6, and admixture tank 8 into the batching plant 1, is configured to have, Coarse aggregate storage bottles 21A and fine aggregate storage bottles 21B for temporarily storing the coarse and fine aggregates transferred into the batching plant 1 by transfer means 3 such as belt conveyors from the aggregate storage silo 2 provided outside the batching plant 1, A cement storage bottle 41 for temporarily storing the cement transferred into the batching plant 1 by transfer means 5 such as a pressure pipe from the cement silo 4 provided outside the batching plant 1, Coarse aggregate measuring bottles 22A and fine aggregate measuring bottles 22B that are disposed below the coarse aggregate storage bottles 21A and fine aggregate storage bottles 21B and measure and store the coarse and fine aggregates contained in the coarse aggregate storage bottles 21A and fine aggregate storage bottles 21B according to the blending amounts based on the mix design, A cement measuring bottle 42 that is disposed below the cement storage bottle 41 and measures and stores the cement contained in the cement storage bottle 41 according to the blending amount based on the mix design, A water measuring bottle 62 that measures and stores the water transferred into the batching plant 1 by transfer means 7 such as a transfer pipe from the water tank 6 provided outside the batching plant 1 according to the blending amount based on the mix design, An admixture measuring bottle 82 that measures and stores the admixture transferred into the batching plant 1 by transfer means 9 such as a transfer pipe from the admixture tank 8 provided outside the batching plant 1 according to the blending amount based on the mix design, A mixer tank 10 that kneads the measured coarse and fine aggregates, cement, water, and admixture after they are fed from the respective measuring bottles 22A, 22B, 42, 62, 82, is configured to have, After each material in a specified amount is kneaded in the mixer tank 10 for a specified time to form fresh concrete, it is loaded onto an agitator truck 12 via a hopper 11 disposed below the mixer tank 10. The fresh concrete loaded on the agitator truck 12 is transported to the placing site within the specified time and placing is started. In addition, in FIG. 1, reference numeral 3A indicates a selector that distributes coarse aggregate and fine aggregate transferred to the coarse aggregate storage bottle 21A and the fine aggregate storage bottle 21B by the transfer means 3. Furthermore, in the present invention, the transfer means refers to equipment for transferring each raw material to the next process, that is, transfer passages such as a belt conveyor, a pressure pipe, and a transfer pipe.

[0043] The manufacturing equipment of the present invention is configured such that Peltier elements 13 are disposed in surface contact on the surfaces of the coarse aggregate storage bottle 21A, the fine aggregate storage bottle 21B, and the cement storage bottle 41 in the batcher plant 1 as shown in FIG. 2, and the side in surface contact with each surface is a cooling surface.

[0044] The temperature control method of the present invention is to supply power to the Peltier element 13 disposed in surface contact with each surface of the respective storage bottles 21A, 21B, and 41 so that the side in surface contact with each surface is a cooling surface as shown in FIG. 2, thereby cooling each surface, and controlling the temperatures of the coarse aggregate stored in the coarse aggregate storage bottle 21A, the fine aggregate stored in the fine aggregate storage bottle 21B, and the cement stored in the cement storage bottle 41.

[0045] According to the manufacturing equipment and the temperature control method of the present invention described above, fresh concrete can be manufactured in a state where each material is efficiently and reliably cooled. In particular, by disposing the Peltier element 13 in surface contact with the surfaces of the storage bottles 21A, 21B, and 41 of each material, it is possible to cool the internal materials through each storage bottle 21A, 21B, and 41. Therefore, it can be applied extremely easily and at low cost without significantly modifying the existing fresh concrete manufacturing equipment. There is no need for a refrigerant storage tank and cooling / refrigeration equipment that are essential in the case of a cooling mode using a refrigerant such as water or ice. In addition, since the Peltier element 13 has good temperature responsiveness, cooling or heating can be started promptly.

[0046] Furthermore, in the manufacturing equipment of the present invention, a Peltier element 13 is disposed in surface contact on the surface of each of the coarse aggregate measuring flask 22A, fine aggregate measuring flask 22B, cement measuring flask 42, water measuring flask 62, and admixture measuring flask 82 in the batcher plant 1 as shown in FIG. 5, and it is preferable that the side in surface contact with each surface is a cooling surface.

[0047] Furthermore, in the temperature control method of the present invention, for the Peltier element 13 disposed in surface contact on the surface of each of the measuring flasks 22A, 22B, 42, 62, and 82 as shown in FIG. 5, the Peltier element 13 is powered so that the side in surface contact with each surface becomes a cooling surface, thereby cooling each of the surfaces, and controlling the temperatures of the coarse aggregate measured in the coarse aggregate measuring flask 22A, the fine aggregate measured in the fine aggregate measuring flask 22B, the cement measured in the cement measuring flask 42, the water measured in the water measuring flask 62, and the admixture measured in the admixture measuring flask 82. It is preferable that it is the structure.

[0048] According to the preferred configuration of the present invention in which the Peltier element 13 is also disposed in each of the measuring flasks 22A, 22B, 42, 62, and 82, each material that has already been cooled in each of the storage flasks 21A, 21B, and 41 is transferred to the measuring flasks 22A, 22B, 42, 62, and 82 for measurement, and is further cooled in the measuring flasks 22A, 22B, 42, 62, and 82 cooled by the Peltier element 13. Therefore, each material can surely maintain the cooled state.

[0049] Furthermore, in the manufacturing equipment of the present invention, a Peltier element 13 is disposed in surface contact on the surface of the mixer tank 10 that kneads and mixes the coarse aggregate, fine aggregate, cement, water, and admixture measured by each of the measuring flasks 22A, 22B, 42, 62, and 82 as shown in FIG. 6, and it is preferable that the side in surface contact with the surface is a cooling surface.

[0050] Furthermore, in the manufacturing method of the present invention, a Peltier element 13 is disposed in surface contact on the surface of a mixer tank 10 that kneads coarse aggregate, fine aggregate, cement, water, and admixture, and power is supplied to the Peltier element 13 so that the side in surface contact with the surface becomes a cooling surface, thereby controlling the temperature of fresh concrete manufactured by kneading in the mixer tank 10. This configuration is preferable.

[0051] According to the preferred configuration of the present invention in which the Peltier element 13 is also disposed in the mixer tank 10, since each material already in a cooled state is kneaded in the mixer tank 10 cooled by the Peltier element 13, it is possible to knead in a state where the temperature is suppressed so as not to rise excessively due to the heat generated by the hydration reaction during the midsummer period.

[0052] Furthermore, the manufacturing equipment of the present invention is provided outside the batcher plant 1, and a Peltier element 13 is disposed in surface contact on the surface of each of an aggregate storage silo 2, a cement silo 4, a water tank 6, and an admixture tank 8 that store coarse aggregate, fine aggregate, cement, water, and admixture, and it is preferable that the side in surface contact with the surface is configured as a cooling surface.

[0053] Furthermore, in the manufacturing method of the present invention, a Peltier element 13 is disposed in surface contact on the surface of each of an aggregate storage silo 2, a cement silo 4, a water tank 6, and an admixture tank 8 provided outside the batcher plant 1, and power is supplied to the Peltier element 13 so that the side in surface contact with each surface becomes a cooling surface, thereby cooling each and controlling the temperature of each material. This configuration is preferable.

[0054] According to the preferred configuration of the present invention in which the Peltier element 13 is disposed on the surface of each of the aggregate storage silo 2, the cement silo 4, the water tank 6, and the admixture tank 8, since each raw material is stored for a long time, a sufficient cooling time can be ensured, so that the raw materials can be reliably cooled. In particular, by performing cooling at night when the operation of the batcher plant 1 is stopped, cold heat can be stored in each material.

[0055] Furthermore, in the manufacturing equipment of the present invention, Peltier elements 13 are disposed in surface contact on the surfaces of each of the transfer means 3 for transferring coarse and fine aggregates from the aggregate storage silo 2 into the batching plant 1, the transfer means 5 for transferring cement from the cement silo 4 into the batching plant 1, the transfer means 7 for transferring water from the water tank 4 into the batching plant 1, and the transfer means 9 for transferring admixtures from the admixture tank 8 into the batching plant 1, and it is preferable that the side in surface contact with each surface is a cooling surface.

[0056] Furthermore, in the manufacturing method of the present invention, Peltier elements 13 are disposed in surface contact on the surfaces of each of the transfer means 3 for transferring coarse and fine aggregates, the transfer means 5 for transferring cement, the transfer means 7 for transferring water, and the transfer means 9 for transferring admixtures, and power is supplied to the Peltier elements 13 so that the side in surface contact with each surface becomes a cooling surface, thereby cooling each of them and controlling the temperature during the transfer of each material. It is preferable that it is a configuration.

[0057] As the arrangement position of the Peltier element 13 on each of the transfer means 3, 5, 7, and 9, for example, in the case of the transfer means 3, it is preferable to dispose the Peltier element 13 on the surface of a tubular casing covering the belt conveyor. In the case of the transfer means 5, it is preferable to dispose the Peltier element 13 on the surface of the pressure feed pipe. In the case of the transfer means 7 and 9, it is preferable to dispose the Peltier element 13 on the surface of the transfer pipe.

[0058] According to the preferable configuration of the present invention in which the Peltier element 13 is disposed on the surface of each of the transfer means 3, 5, 7, and 9, the raw materials being transferred from each of the aggregate storage silo 2, the cement silo 4, the water tank 6, and the admixture tank 8 into the batching plant 1 can be controlled to an appropriate temperature range by cooling or heating.

[0059] In the present invention, the hot season in which the temperature is controlled by cooling is the period when the daily average temperature exceeds 25°C.

[0060] In temperature control, the temperature of each material in each part within the batch plant 1 of the manufacturing facility, that is, the temperature of each material in each storage bottle 21A, 21B, 41, the temperature of each material in each measuring bottle 22A, 22B, 42, 62, 82, and the temperature of the material being kneaded in the mixer tank 10 are measured, and temperature control can be performed based on the measured values. Further, the temperature control is not limited to within the batch plant 1, and it is also preferable to measure the temperature of each material in the aggregate storage silo 2, cement silo 4, water tank 6, admixture tank 8 outside the batch plant 1, and each transfer means 3, 5, 7, 9, and perform temperature control based on the measured values. The temperature measurement is preferably measured by a measuring unit such as a thermometer, and it is more preferable that the power supply to the Peltier element 13 is automatically controlled by the control unit or turned on and off manually based on the measured temperature of each material, and the cooling temperature is appropriately set. As the configuration of the measuring unit for measuring the temperature, for example, it is preferable to measure the temperature of each material in a non-contact state by a radiation thermometer.

[0061] Next, an example of the arrangement configuration of the Peltier element 13 on the surface of each storage bottle 21A, 21B, 41 will be described. As shown in FIG. 2, in order to efficiently cool substantially the entire surface of each storage bottle 21A, 21B, 41, a large number of Peltier elements 13 are attached to the entire surface of each storage bottle 21A, 21B, 41 at appropriate intervals. In FIG. 2, reference numeral 14 is a wiring, and reference numeral 15 is a power supply unit that supplies power to the Peltier element 13 via the wiring 14.

[0062] The number of Peltier elements 13 to be attached is appropriately set according to the capacity of each storage bottle 21A, 21B, 41 and the cooling capacity of the Peltier element 13. For example, when the capacity of any one of the storage bottles is about 4.0 to 4.4 m 3 In this case, by using 90 Peltier elements of 30 W each, it has the ability to remove thermal energy corresponding to 1870 W (calculated as an efficient operating rate of 70% of 30 W × 90 = 2700 W), that is, the cooling ability to quickly lower the temperature of the storage bottle, and can sufficiently cope even in the midsummer season.

[0063] Also, as an example of the mounting configuration of the Peltier element 13 to each storage bottle 21A, 21B, 41, as shown in FIG. 3, the Peltier element 13 is attached to one surface of a breathable sheet body 16, and the sheet body 16 is attached to the surfaces of the storage bottles 21A, 21B, 41 so that this one surface side is in close contact with the surfaces of the storage bottles 21A, 21B, 41. According to such a configuration, it can be easily attached to the existing storage bottles 21A, 21B, 41.

[0064] In addition, when one surface of the Peltier element 13 is a cooling surface, the other surface becomes a heat dissipation surface (heating surface). That is, when the side in contact with the surfaces of the storage bottles 21A, 21B, 41 is the cooling surface, the sheet body 16 side becomes the heating surface, but since the sheet body 16 has air permeability, it can dissipate heat. Therefore, a decrease in thermal efficiency can be prevented or suppressed. Examples of the breathable sheet body 16 include a mesh sheet and a net-like sheet as shown in FIG. 3.

[0065] Also, as shown in FIG. 4, a configuration in which a plurality of strip-shaped Peltier elements 13 are connected in series and the plurality of strip-shaped Peltier elements 13 are wound around the surfaces of the storage bottles 21A, 21B, 41 can also be cited. It can be made to correspond by increasing or decreasing the number of strips according to the required cooling capacity.

[0066] Next, an example of the arrangement configuration of the Peltier element 13 on the surfaces of each measuring bottle 22A, 22B, 42, 62, 82 will be described. As shown in FIG. 5, in order to efficiently cool substantially the entire surface of each measuring bottle 22A, 22B, 42, 62, 82, a large number of the Peltier elements 13 are attached to the entire surface of each measuring bottle 22A, 22B, 42, 62, 82 at appropriate intervals. In FIG. 3, reference numeral 14 is a wiring, and reference numeral 15 is a power supply unit that supplies power to the Peltier element 13 via the wiring 14.

[0067] In addition, as an example of the mounting configuration of the Peltier element 13 to each measuring flask 22A, 22B, 42, 62, 82, the same configuration as the mounting configuration example to each of the above storage flasks 21A, 21B, 41 can be adopted. Therefore, according to such a configuration, it can be easily attached to the existing measuring flasks 22A, 22B, 42, 62, 82 as well.

[0068] Next, an example of the arrangement configuration of the Peltier element 13 on the surface of the mixer tank 10 will be described. As shown in FIG. 6, in order to efficiently cool substantially the entire mixer tank 10, a number of Peltier elements 13 are attached to the entire surface of the mixer tank 10 at appropriate intervals. In FIG. 6, reference numeral 14 is a wiring, and reference numeral 15 is a power supply unit that supplies power to the Peltier element 13 via the wiring 14.

[0069] In addition, as an example of the mounting configuration of the Peltier element 13 to the mixer tank 10, the same configuration as the mounting configuration example to each of the above storage flasks 21A, 21B, 41 can be adopted. Therefore, according to such a configuration, it can be easily attached to the existing mixer tank 10 as well.

[0070] According to the manufacturing equipment and temperature control method of the present invention, fresh concrete can be manufactured in a state where each material is efficiently and reliably cooled. In particular, by disposing the Peltier element 13 in a surface contact state on the surfaces of the storage flasks 21A, 21B, 41, the measuring flasks 22A, 22B, 42, 62, 82, and the mixer tank 10 of each material, it is possible to cool each internal material through the storage flasks 21A, 21B, 41, the measuring flasks 22A, 22B, 42, 62, 82, and the mixer tank 10. Therefore, it can be applied extremely easily and at low cost without significantly modifying the existing manufacturing equipment for fresh concrete. There is no need for a refrigerant storage tank and cooling / refrigeration equipment that are essential in the case of a cooling mode using a refrigerant such as water or ice. In addition, since the Peltier element 13 has good temperature responsiveness, cooling can be started promptly.

[0071] Furthermore, with regard to the equipment outside the batcher plant 1 in the manufacturing equipment of the present invention, such as the aggregate storage silo 2, the cement silo 4, the water tank 6, the admixture tank 8, and the mounting configuration example of the Peltier element 13 for each transfer means 3, 5, 7, 9, the configurations shown in FIGS. 3 and 4 can be cited in the same manner as above. According to such a configuration, it is possible to control so that each material becomes an appropriate temperature range in the stage before being transferred into the batcher plant 1.

[0072] Note that the manufacturing equipment and temperature control method of the present invention are not applicable only to the above-mentioned midsummer concrete, but can also be applied to winter concrete. That is, in the manufacturing equipment and temperature control method of fresh concrete in midsummer described above, the storage bottles 21A, 21B, 41, the measuring bottles 22A, 22B, 42, 62, 82, and the side in contact with the surface of the mixer tank 10 of the Peltier element 13 were used as the cooling surfaces, but in winter, the side in contact with the Peltier element 13 is used as the heating surface.

[0073] The Peltier element 13 can be switched so that the side in surface contact with the surface side becomes a cooling surface or a heating surface simply by changing the polarity. By switching the polarity of this Peltier element, each material in the storage bottles 21A, 21B, 41 and the measuring bottles 22A, 22B, 42, 62, 82, and further the fresh concrete kneaded in the mixer tank 10 can be cooled in summer and heated in winter, so that fresh concrete can be manufactured in an appropriate temperature range throughout the year.

[0074] That is, when the daily average temperature becomes 4°C or lower, it is possible to adopt a configuration in which each material in the storage bottles 21A, 21B, 41 and the measuring bottles 22A, 22B, 42, 62, 82, and further the fresh concrete kneaded in the mixer tank 10 is heated so that the temperature is within the range of 5 to 20°C. According to such a configuration, in winter when the daily average temperature is 4°C or lower, fresh concrete can be maintained at 5°C or higher, which is a temperature at which the quality can be maintained.

[0075] In addition, when the daily average temperature drops to 4°C or lower, the aggregate storage silo 2, cement silo 4, water tank 6, admixture tank 8, and each transfer means 3, 5, 7, 9, which are facilities outside the batcher plant 1 in the manufacturing equipment of the present invention, are heated by the Peltier element 13, so that each material can be controlled to be in an appropriate temperature range in the stage before being transferred into the batcher plant 1. In addition, if the Peltier element 13 is disposed not only in the batcher plant 1 but also in each facility such as the aggregate storage silo 2, which is a facility outside the batcher plant 1, since raw materials such as aggregates stay in each facility such as the aggregate storage silo 2 for a long time, sufficient cooling or heating time can be ensured. Furthermore, if cooling or heating is performed during the night when the operation of the fresh concrete manufacturing equipment is stopped, at the start of business on the next operating day, the raw materials, which are aggregates, will be at an appropriate temperature, and subsequent fresh concrete production can proceed promptly. Also, the electricity cost can be suppressed by using nighttime electricity.

Explanation of Signs

[0076] 1 Batcher plant 2 Aggregate storage silo 21A Coarse aggregate storage bottle 21B Fine aggregate storage bottle 22A Coarse aggregate measuring bottle 22B Fine aggregate measuring bottle 3 Transfer means 3A Selector 4 Cement silo 41 Cement storage bottle 42 Cement measuring bottle 5 Transfer means 6 Water tank 7 Transfer means 8 Admixture tank 82 Admixture measuring bottle 9 Transfer means 10 Mixer tank 11 Hopper 12 Agitator truck 13 Peltier element 14 Wiring 15 Power supply unit 16 Sheet body

Claims

1. In a fresh concrete manufacturing facility, a Peltier element is disposed in surface contact on each surface of a coarse aggregate storage bottle, a fine aggregate storage bottle, and a cement storage bottle, and the side in surface contact with each surface is a cooling surface or a heating surface. A fresh concrete manufacturing facility characterized by this configuration.

2. A Peltier element is disposed in surface contact on each surface of a coarse aggregate measuring bottle, a fine aggregate measuring bottle, a cement measuring bottle, a water measuring bottle, and an admixture measuring bottle, and the side in surface contact with each surface is a cooling surface or a heating surface. The fresh concrete manufacturing facility according to claim 1, characterized by this configuration.

3. A Peltier element is disposed in surface contact on the surface of a mixer tank that kneads and mixes coarse aggregate, fine aggregate, cement, water, and admixture measured by each measuring bottle, and the side in surface contact with the surface is a cooling surface or a heating surface. The fresh concrete manufacturing facility according to claim 1 or 2, characterized by this configuration.

4. A measuring unit that measures the temperature of each of coarse aggregate, fine aggregate, cement, water, and admixture, and a control unit that controls power supply to the Peltier element based on the temperature of each material measured by each measuring unit. The fresh concrete manufacturing facility according to claim 3, characterized by this configuration.

5. By changing the polarity of the Peltier element, the side in surface contact with each surface side is a cooling surface in hot weather and a heating surface in cold weather. The fresh concrete manufacturing facility according to claim 1 or 2, characterized by this configuration.

6. By changing the polarity of the Peltier element, the side in surface contact with each surface side is a cooling surface in hot weather and a heating surface in cold weather. The fresh concrete manufacturing facility according to claim 3, characterized by this configuration.

7. A Peltier element is disposed in surface contact on one or more surfaces of an aggregate storage silo, a cement silo, a water tank, or an admixture tank, and the side in surface contact with the surface is a cooling surface or a heating surface. The fresh concrete manufacturing facility according to claim 1, characterized by this configuration.

8. Transfer means for transferring coarse aggregate and fine aggregate from an aggregate storage silo into a batching plant, transfer means for transferring cement from a cement silo into the batching plant, transfer means for transferring water from a water tank into the batching plant, or transfer means for transferring an admixture from an admixture tank into the batching plant, wherein a Peltier element is disposed in surface contact on one or more surfaces thereof, and the side in surface contact with each surface is a cooling surface or a heating surface. The fresh concrete manufacturing facility according to claim 1, characterized in that it has such a configuration.

9. In a fresh concrete manufacturing facility, a Peltier element is disposed in surface contact on each surface of a coarse aggregate storage bottle, a fine aggregate storage bottle, and a cement storage bottle, and power is supplied to the Peltier element so that the side in surface contact with each surface of the Peltier element becomes a cooling surface or a heating surface, thereby cooling or heating each surface, and controlling the temperature of the coarse aggregate stored in the coarse aggregate storage bottle, the fine aggregate stored in the fine aggregate storage bottle, and the cement stored in the cement storage bottle. A temperature control method in a fresh concrete manufacturing process, characterized in that it has such a configuration.

10. A Peltier element is disposed in surface contact on each surface of a coarse aggregate weighing bottle, a fine aggregate weighing bottle, a cement weighing bottle, a water weighing bottle, and an admixture weighing bottle, and power is supplied to the Peltier element so that the side in surface contact with each surface of the Peltier element becomes a cooling surface or a heating surface, thereby cooling or heating each surface, and controlling the temperature of the coarse aggregate weighed in the coarse aggregate weighing bottle, the fine aggregate weighed in the fine aggregate weighing bottle, the cement weighed in the cement weighing bottle, the water weighed in the water weighing bottle, and the admixture weighed in the admixture weighing bottle. The temperature control method in a fresh concrete manufacturing process according to claim 9, characterized in that it has such a configuration.

11. A Peltier element is disposed in surface contact on the surface of a mixer tank for kneading the coarse aggregate, fine aggregate, cement, water, and admixture weighed by each weighing bottle, and power is supplied to the Peltier element so that the side in surface contact with the surface becomes a cooling surface or a heating surface, thereby controlling the temperature of the fresh concrete manufactured by kneading in the mixer tank. The temperature control method in a fresh concrete manufacturing process according to claim 9 or 10, characterized in that it has such a configuration.

12. The method for controlling the temperature in the manufacturing process of fresh concrete according to claim 9 or 10, characterized in that it is configured to cool when the daily average temperature exceeds 25°C.

13. The method for controlling the temperature in the manufacturing process of fresh concrete according to claim 9 or 10, characterized in that it is configured to heat when the daily average temperature is 4°C or lower.

14. A Peltier element is disposed in surface contact on one or more surfaces of an aggregate storage silo, a cement silo, a water tank, or an admixture tank, and power is supplied to the Peltier element so that the side in surface contact with each surface of the Peltier element becomes a cooling surface or a heating surface, thereby cooling or heating each surface, and controlling the temperature of the coarse aggregate and fine aggregate stored in the aggregate storage silo, the cement stored in the cement silo, the water stored in the water tank, and the admixture stored in the admixture tank. The method for controlling the temperature in the manufacturing process of fresh concrete according to claim 9, characterized in that it is a configuration.

15. A Peltier element is disposed in surface contact on one or more surfaces of the transfer means for transferring coarse aggregate and fine aggregate from the aggregate storage silo into the batching plant, the transfer means for transferring cement from the cement silo into the batching plant, the transfer means for transferring water from the water tank into the batching plant, or the transfer means for transferring the admixture from the admixture tank into the batching plant, and each surface is cooled or heated, and the temperature of the coarse aggregate and fine aggregate, cement, water, and admixture being transferred from each of the aggregate storage silo, cement silo, water tank, and admixture tank into the batching plant is controlled. The method for controlling the temperature in the manufacturing process of fresh concrete according to claim 9, characterized in that it is a configuration.

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