JP2003305714A - Method and apparatus for manufacturing concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a concrete wherein there exists neither problem on dust nor problem on cleaning water when the concrete is directly obtained by a concrete mixer vehicle. <P>SOLUTION: Gravel and sand are directly fed into a concrete mixer vehicle (CV). Cement is fed into a continuous moistening feeding machine (30), wherein it is kneaded and moistened with a specified amount of kneading water which is a set amount necessary for obtaining a specified quality of a concrete, and then, the mixture is fed into the concrete mixer vehicle (CV). Then, the inside of the continuous moistening feeding machine (30) is cleaned with remaining kneading water used for moistening and the kneading water used for cleaning is fed into the concrete mixer vehicle (CV). <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a predetermined amount of gravel,
The present invention relates to a concrete manufacturing method in which a concrete material composed of sand, cement, kneading water, an admixture, etc. is put into a concrete mixer truck to manufacture concrete, and a concrete manufacturing apparatus used for carrying out this method.

[0002]

2. Description of the Related Art As is well known in the art, a concrete manufacturing apparatus, that is, a batcher plant, is provided with a dedicated mixer for mixing concrete. A measuring tank composed of a gravel measuring tank, a sand measuring tank, a cement measuring tank, and the like is arranged above it, and a material storage bottle such as a gravel storage bottle, a sand storage bottle, and a cement storage bottle is further provided above it. There is. Such a concrete kneading mixer, a measuring tank, and a material storage bottle are provided in a layered structure assembled at a predetermined height above the ground. On the other hand, below the cement storage silo installed on the ground, an air transport pipe extending to the cement storage bin is provided. Similarly, below the aggregate storage silo, such as a sand storage silo and a gravel storage silo, which are installed on the ground, a first aggregate receiving belt conveyor arranged substantially horizontally is provided.
The first aggregate receiving belt conveyor is connected to the sorting device via a second aggregate receiving belt conveyor which is arranged in an inclined manner. Therefore, the gravel and the sand sent from the aggregate storage silo by the first and second aggregate receiving belt conveyors are sorted into the gravel storage bin and the sand storage bin by the sorting device. Then, each of the materials is weighed and then kneaded by a mixer for concrete kneading that is placed.

Since the conventional batcher plant is constructed as described above, it is possible to produce concrete in a known manner and supply it to an agitator truck or a concrete mixer truck. However, the conventional batcher plant has a dedicated mixer for concrete kneading, and a measuring tank, a storage bottle and the like are arranged above the mixer for concrete kneading, so that the whole batcher plant becomes high. There are drawbacks. The higher the cost, the higher the construction cost of the batcher plant and the higher the power cost for transporting the concrete material. Further, since the mixer for exclusive use of concrete kneading is provided, power consumption is large, and there is a big problem of maintenance and inspection of the mixer for concrete kneading, such as cleaning after operation. Moreover, although the conventional batcher plant is also being automated, it has a problem that it cannot be completely unmanned because it has a mixer for concrete kneading and thus requires a specialized operator to monitor and maintain the mixer.

Therefore, the applicant of the present invention has proposed a method for producing concrete using an agitator truck without installing a fixed mixer for concrete kneading.
Proposed by No. 88160. According to the above invention proposed by the applicant, a single common belt conveyor is used, on which gravel, sand,
When concrete materials such as cement are discharged from each measuring tank, these materials form a belt-like lamination on the belt conveyor according to their mixing ratio, and the cement becomes the uppermost layer or the intermediate layer of gravel and sand. The discharge amount from the measuring tank and the discharge start and end time,
The material, which is almost completely laminated and dispersed in a strip shape, is directly put into the concrete mixer car, and the measured kneading water and the admixture are directly put into the concrete mixer car through a pipe equipped with a valve capable of adjusting the flow rate. The drum of the concrete mixer truck is switched to high-speed rotation for a predetermined time after each material is charged, and is operated to obtain the required concrete.

Further, JP-A-11-300188 proposes a humidifying and kneading device. The stirring blade of this humidifying / kneading device is provided with a jet port for jetting a liquid. Therefore, when the stirring blade is rotationally driven and the liquid is ejected from the ejection port, the powdery particles can be continuously moistened and kneaded.

[0006]

According to the above-mentioned method for producing concrete proposed by the present applicant, concrete of a predetermined quality can be obtained by a concrete mixer car without a mixer for concrete kneading. The effect is obtained. Further, since the cement is laminated on the uppermost layer or the intermediate layer, the hygroscopic cement is prevented from adhering to the belt conveyor. Furthermore, since there is no mixer for concrete kneading, the whole concrete manufacturing equipment can be constructed at a low cost and at low cost, and the maintenance and inspection costs are also low. Furthermore, the concrete manufacturing equipment has aggregate management, measurement management, shipping management. By providing a system that can centrally manage the etc., it is possible to manufacture concrete by unmanned operation, for example, a driver of a concrete mixer car pushes a push button of a concrete manufacturing device and puts concrete material into the concrete mixer car. Can also be obtained.

As described above, according to the invention proposed by the applicant of the present invention, there are various effects or advantages and there are few problems, but there are also points to be improved. For example, when cement is put into a concrete mixer truck, the cement may be scattered as dust and pollute the environment. In particular, during the dry season from winter to spring, if strong wind blows, leeward will be damaged by cement dust. As described above, since there is a problem of cement dust, the batcher plant is generally provided with a dust collector. Since the dust collector comprises a back filter, a blower as a suction device, etc., as is well known in the related art, there is a problem that it is expensive and the construction cost of the batcher plant is high. Therefore, the present applicant has filed a patent application 20
01-392128 proposes a batcher plant equipped with a small duster that produces a small amount of cement dust and is therefore inexpensive. The duster of the present batcher plant has a feature that the construction cost and the maintenance cost are low because it is small in size, but it still has the dust collector.

On the other hand, since the humidifying and kneading device disclosed in the above-mentioned Japanese Patent Laid-Open No. 11-300188 has a jet of liquid, it can be said that the problem of scattering of powder and granules is small. However, this humidifying and kneading device is not intended to be applied to a batcher plant in which concrete is directly obtained by a concrete mixer truck. For example, even if an attempt is made to apply the above-mentioned humidifying and kneading device having less problem of scattering of powdery particles to a batcher plant, it cannot be applied. This is because the wet cement solidifies, so that it is necessary to wash with water after the moistening and kneading, but a method for washing with water has not been established. In particular, if the cleaning water containing cement is drained as it is,
In the batcher plant, which pollutes the environment but directly obtains the concrete by the concrete mixer truck, the cement is added in batches, and if it is washed each time, the problem of washing water becomes large.

Cement is a powder in which the particle diameters are almost the same. When kneading cement having such a particle diameter and water, water acts as binding water between the particles of the cement, and The particles are aggregated, so-called capillaries. The binding force of the capillary-shaped cement particles is strong, a large amount of energy is required to release this binding force, and there is a possibility that the concrete mixer vehicle cannot completely solve the binding force.

The present invention is intended to provide a concrete manufacturing method and a concrete manufacturing apparatus which solve the above-mentioned problem of dust or the problem of bonding cement particles together. It is an object of the present invention to provide a concrete manufacturing method and a concrete manufacturing apparatus used for carrying out the manufacturing method, which does not have a problem of dust when directly obtaining concrete and a problem of washing. Further, another object of the present invention is to provide a concrete manufacturing method and a concrete manufacturing apparatus which solve the problem of agglomeration of cement particles in addition to the above objects.

[0011]

In order to achieve the above object, the invention as set forth in claim 1 uses a concrete material comprising a predetermined amount of gravel, sand, cement, kneading water, an admixture, etc. in a concrete mixer truck. Injecting, and a manufacturing method for producing concrete in the concrete mixer car, gravel and sand are directly charged into the concrete mixer car, cement is supplied to a continuous humidifier, a predetermined quality grade. Mix and humidify the set amount of kneading water required to obtain concrete, and put it into a concrete mixer truck, and then wash the inside of the continuous humidifier with the remaining kneading water used for humidification, and then use for washing. The kneading water is put into a concrete mixer truck to obtain the required quality of concrete. The invention according to claim 2 is a manufacturing method in which a concrete material comprising a predetermined amount of gravel, sand, cement, kneading water, an admixture, etc. is charged into a concrete mixer car, and concrete is manufactured in the concrete mixer car. Then, the gravel is put directly into the concrete mixer truck, and the cement and sand are fed to the continuous humidifier and mixed and moistened with the specified amount of kneading water required to obtain the specified quality of concrete. Then, the mixture is put into a concrete mixer truck, and then the inside of the continuous humidifier is washed with the remaining kneading water used for humidification, and the kneading water used for washing is put into the concrete mixer truck, and concrete of a required quality is obtained. The invention according to claim 3 is configured to obtain a concrete material comprising a predetermined amount of gravel, sand, cement, kneading water, an admixture, etc. A method for producing concrete in a concrete mixer truck by throwing it into a tomixer truck, wherein cement is supplied to a continuous humidifier and a set amount of kneading water necessary to obtain concrete of a predetermined quality is obtained. Mix and humidify with a predetermined amount, and then stack the gravel or sand on the bottom layer on a conveyor device such as a belt conveyor and put it in the concrete mixer truck, then continue with the remaining kneading water used for humidification The inside of the humidifier is washed, and the kneading water used for washing is thrown into a concrete mixer truck to obtain concrete of a required quality.
Put a concrete material consisting of a certain amount of gravel, sand, cement, kneading water, admixture, etc. into a concrete mixer truck,
And in the manufacturing method for producing concrete in the concrete mixer car, cement and sand are supplied to a continuous humidifier and mixed with a predetermined amount of kneading water of a set amount necessary to obtain concrete of a predetermined quality. Humidified and laminated on the gravel on a conveyor such as a belt conveyor and put into a concrete mixer truck, then the inside of the continuous humidifier was washed with the remaining kneading water used for humidification, and then used for washing. The kneading water is put into a concrete mixer truck to obtain concrete of a required quality, and the invention according to claim 5 is subjected to the washing according to any one of claims 1 to 4. The end of adding the kneading water is configured to be almost the same as the end of adding the other concrete materials.
A sixth aspect of the present invention is a measuring tank for measuring concrete materials such as gravel, sand, cement, kneading water, and an admixture, and cement is supplied from one upstream side and discharged from the other downstream side. It is equipped with a continuous humidifier charging device and a control device, and the set amount of gravel, sand, cement and kneading water measured in these measuring tanks is charged into the concrete mixer car, and the concrete mixer car A concrete manufacturing apparatus, wherein the continuous humidifier is a concrete manufacturing apparatus.
An injection nozzle is provided on the upstream side of the inside thereof, and the control device is configured such that when a set amount of cement is continuously supplied to the continuous humidifier and is continuously supplied to a concrete mixer truck, Inside is controlled to supply a predetermined amount of kneading water to the injection nozzle, and to control the remaining amount of kneading water to be supplied to the continuous humidifier even after the cement has been added. To be configured. The invention described in claim 7 is a measuring tank for measuring concrete materials such as gravel, sand, cement, kneading water, and admixture, and cement and sand are supplied from one upstream side and the other downstream side. It is equipped with a continuous humidifier, which is designed to be discharged from the tank, and a controller. A concrete production apparatus adapted to produce concrete by a mixer car, wherein the continuous humidifier is provided with an injection nozzle on the upstream side inside thereof, and the control device is a set amount of cement. When sand and sand are continuously supplied to the continuous humidifier and continuously input to the concrete mixer truck, a predetermined amount of kneading water is injected during the whole period. It controls so that it may control so that it may supply to a nozzle, and even after the addition of cement and sand is complete | finished, it controls so that the remainder of kneading water of a set amount may be supplied to the said continuous humidification addition machine, The invention according to claim 6 or 7 is such that the cement measuring tank and the continuous humidifier are connected through a flexible canvas, and the invention according to claim 9 is The continuous humidifier according to any one of items 1 to 8 includes an upstream fixed amount supply unit and a downstream fixed amount supply unit, and the fixed amount supply unit includes a screw, and the humidification unit includes a plurality of screws. A jet nozzle and a plurality of stirring blades are provided.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION First, an embodiment of a concrete manufacturing apparatus will be described. FIG. 1 is a schematic diagram of a concrete manufacturing apparatus according to an embodiment of the present invention. As shown in the figure, according to the present embodiment, the concrete manufacturing apparatus is the right side of FIG. As shown in the lower part, the material input hopper 1 provided at a higher position than the concrete mixer car CV is provided. Further, a humidifying cement feeding auxiliary chute 2 is provided at a corner of the material feeding hopper 1. The concrete material such as gravel and sand from the material feeding hopper 1, and the humidified cement or the humidified cement and sand from the humidified cement feeding auxiliary chute 2 directly to the concrete mixer car CV to be arranged below. It is supposed to be thrown into. As described above, according to the present embodiment, the concrete material is directly put into the concrete mixer car CV, so that a dedicated mixer for concrete kneading unlike the conventional batcher plant is not required. Therefore, the layered structure of the batcher plant is low and the construction is inexpensive. Since there are large-sized vehicles and small-sized vehicles in the concrete mixer vehicle CV, an auxiliary chute 3 is swingably provided at the lower end portion of the material feeding hopper 1, and when loading into the large concrete mixer vehicle CV, As shown in FIG. 1, this auxiliary chute is swingably retracted.

In order to supply the concrete material to such a material feeding hopper 1, a belt conveyor 10 is provided at an ascending slope in the present embodiment shown in FIGS. 1 and 3. Corresponding to this belt conveyor 10, a gravel measuring tank 12 for measuring gravel at a lower position, that is, the most downstream position, and a sand measuring tank 13 for measuring sand at the downstream side thereof.
, And a continuous humidifier 30 for humidifying the cement is provided at the uppermost end. The gravel weighing tank 12
The sand measuring tank 13 is supported by a measuring device such as a load cell, but the load cell is not shown in FIG.

The belt conveyor 10 is composed of horizontal rollers 11, 11 ... For supporting the belt, guide rollers for obliquely supporting the side portions, side plates provided on both sides of the belt, and the like. A plurality of these rollers are provided at predetermined intervals in the longitudinal direction. Therefore, the side sectional shape of the belt conveyor 10 is substantially gutter-shaped. Then, in the present embodiment, the gravel and the sand are conveyed to the material feeding hopper 1 with the gravel as the lower layer. Further, the cement is humidified and supplied to the humidified cement charging auxiliary chute 2. The gravel measuring tank 12 is formed in a substantially funnel shape as a whole, and a gravel discharge gate 14 that is opened and closed by, for example, an air cylinder is provided below the gravel measuring tank 12. The sand measuring tank 13 also
As a whole, it has a substantially funnel shape, and a sand discharge gate 15 that is similarly opened and closed by an air cylinder is provided below the funnel shape.

Above the gravel weighing tank 12, a gravel storage bin 16 is provided, and above the gravel weighing tank 13, a sand storage bin 17 is provided.
Are provided respectively. And these bin 1
Metering gates 18 and 19 are provided at the discharge lower ends of 6 and 17, respectively. The discharge amount or flow rate of the gravel and the sand is adjusted by these measuring gates 18 and 19, and the gravel and the sand are supplied to the gravel and the sand measuring tanks 12 and 13 therebelow. Although not shown in FIG. 1, a gravel bottle and a sand bottle are provided on the ground. Then, a common belt conveyor 5 extends from these bins to a distribution device 6 provided above the layered structure, that is, the batcher plant. The gravel carried by the common belt conveyor 5 from the gravel bin is directed to the gravel storage bin 16 by the sorting device 6 and the sand carried from the sand bin by the common belt conveyor 5 is stored in the sand storage bin 17. It is sorted and stored in each direction.

As shown in detail in FIG. 3, a cement measuring tank 20 supported by load cells 21, 21 is provided above the continuous humidifier 30 and a cement temporary storage tank 22 is provided above the cement measuring tank 20. ing. The cement stored in a cement bin on the ground is supplied to the cement temporary storage tank 22 by a screw conveyor 23 ′ driven by a motor 23. At the discharge outlet below the temporary cement storage tank 22, the cement measuring gate 2
4 are provided. By this cement measuring gate 24, the cement in the temporary cement storage tank 22 can be adjusted and supplied to the cement measuring tank 20. A kneading water measuring tank 26 supported by the load cells 25, 25 is provided obliquely above the continuous humidifier 30 and a kneading water hopper 27 for storing the kneading water measured below is provided below the kneading water measuring tank 26. A pump 28 is provided below the kneading water hopper 27, and a discharge pipe of the pump 28 is formed by a pipe line 29.
The injection nozzle 4 of the continuous humidifier charging device 30 described in detail below
0, 40, ... Therefore, the kneading water is pressurized by the pump 28, and the injection nozzles 40, 40,
.. is sprayed in the form of mist or small water droplets into the continuous humidifier 30.

A specific embodiment of the continuous humidifier 30 is shown enlarged in FIG. Continuous humidifier 30
Is composed of a humidifying section 31 and a fixed quantity supply section 45 connected to the humidifying section 31. The humidifying section 31 includes a cylindrical casing 32, and a first flange 33 is attached to the left side of the casing 32 in FIG. 2, and a central portion thereof serves as a material passage 34. A second flange 35 is attached to the other side. A bearing for a drive shaft 36, which will be described later, is provided at the center of the second flange 35, and a gate 37 that is slidably driven in the vertical direction is also provided. The gate 37 adjusts the time of staying in the humidifying section 31. A lower portion of the gate 37 serves as a discharge port 38, and a discharge chute 39 is attached to the discharge port 38. At the upstream side of the casing 32 thus configured, that is, at the left position in FIG.
0, ... Are attached at predetermined intervals in the circumferential direction. Kneading water is jetted into the casing 32 from these jet nozzles 40, 40, .... The casing 32, the first and second flanges 33 and 35 configured as described above,
The inner peripheral surface or the inner surface of the discharge chute 39 is coated with a resin having a small friction coefficient such as a fluororesin or a wear resistant resin.

A drive shaft 36 is provided in the axial direction at the center of the casing 32 of the humidifying section 31. A plurality of mixing blades 42, 42, ... Are attached to the drive shaft 36 at predetermined intervals in the axial direction and the circumferential direction. The shape of these mixing blades 42, 42, ... Is not particularly limited, but in the embodiment shown in FIG. 2, the portion closer to the inner peripheral wall of the casing 32 is wider and the tip portion thereof is arcuate. It has been cut off. This allows
The amount of cement attached to the inner peripheral wall of the casing 32 is reduced. The surfaces of the drive shaft 36 and the mixing blades 42, 42, ... Configured in this way are also coated with a resin such as a fluororesin.

The fixed quantity supply unit 45 also has a cylindrical casing 46 having a predetermined length in the axial direction. And casing 4
First and second flanges 47 and 48 are attached to both ends of 6, the first flange 47 is a flange of the drive unit 55, and the other second flange 48 is the first flange of the humidifying section 31. It is connected to 33 by, for example, a bolt. As a result, the casing 32 of the humidifying unit 31 and the casing 46 of 45 of the constant amount supplying unit are integrated. Drive shaft 3 provided in the casing 32 of the humidifying section 31
6 extends towards the casing 46 of the dosing part 45 and leads to the drive 55. A screw flight 49 is provided on the drive shaft 36 located inside the casing 46 of the fixed quantity supply unit 45. Therefore, by rotating the drive shaft 36 at a set speed, the cement is transferred by the screw flight 49 toward the fixed amount humidifying section 31. FIG. 2 shows the casing 46 configured as described above.
On the upstream side from the left side, a cement injection chute 50 having a substantially cylindrical shape is attached in a sealed state.
The inner peripheral surface of the casing 46 of the fixed quantity supply part 45 is also coated with resin.

The drive unit 55 comprises a motor 56 and a speed reducer 57 directly connected to the motor 56, and the output shaft of the speed reducer 57 is connected to the drive shaft 36 via a coupling 58.

In the first embodiment, the continuous humidifier 30 constructed as described above is inclined toward the downstream side as a whole as shown in FIG. 1 or FIG. The discharge chute 39 is attached to the layered structure of the batcher plant so as to face the inside of the humidified cement charging auxiliary chute 2. The upper end of the cement charging chute 50 is attached to the lower end of the cement measuring tank 20 via the flexible canvas 51.
As described above, since the cement measuring tank 20 and the cement charging chute 50 are connected via the canvas 51, when the cement is supplied to the continuous humidifier 30 the cement does not become dust and leaks to the outside. . Also,
Since the cement measuring tank 20 and the cement charging chute 50 are connected in a flexible state by the canvas 51, the vibration of the continuous humidifying charging machine 30 causes the cement measuring tank 2 to vibrate.
It is transmitted to 0 and does not deteriorate the weighing accuracy.

Next, an example of manufacturing concrete according to the above embodiment will be described. Although not shown in the figure, the concrete production according to the present embodiment is also provided with a control device, so that automatic operation is possible, but for convenience, an operation method in which manual operation and automatic operation are mixed will be described. . Gravel and sand are stored in the gravel storage bin 16 and the sand storage bin 17, respectively, as described above. Then, the gravel and the sand measuring tanks 12 and 13 measure the gravel and the sand, respectively. Cement is also measured in the cement measuring tank 20.
Gravel is supplied from the gravel measuring tank 12 and sand is uniformly supplied from the sand measuring tank 13 onto the belt conveyor 10. Further, the cement is supplied to the continuous humidifier 30 as described later. At this time, the traveling speed of the belt conveyor 10, the rotation speed of the drive shaft 36 of the continuous humidifier 30 and the gravel weighing tank 1
2. The amount of supply from the sand measuring tank 13 and the cement measuring tank 20, the supply start timing, the supply end timing, etc. are controlled by the control device so that the material supply hopper 1 finishes supplying at substantially the same time. As a result, gravel is piled up on the lowermost layer of the belt conveyor 10, and sand is layered on the gravel and is fed into the drum of the concrete mixer car CV through the material feeding hopper 1. As will be described later, the cement is humidified and introduced into the drum of the concrete mixer car CV via the humidified cement introduction auxiliary chute 2.

The drive shaft 36 of the continuous humidifier 30 is driven by the motor 56 of the drive unit 55 at a set speed. The cement in the cement measuring tank 20 has a fixed quantity supply unit 5
By the screw flight 49 of 0, it is sent to the humidifying section 31 at a predetermined ratio. Then, it is discharged from the discharge chute 39. At this time, a set amount of the kneading water, which has been measured, is pressurized by the pump 28 and supplied from the pipe 28 to the injection nozzles 40, 40, .... The kneading water is sprayed in a spray state. As a result, the cement is mixed while being humidified by the mixing blades 42, 42, ... And put into the drum of the concrete mixer truck CV.

After the humidifying supply of cement is completed, the remaining kneading water used for humidifying is continuously injected into the injection nozzles 40 and 4.
It is jetted from 0, .... As a result, the continuous humidifier 3
0 inner peripheral wall, surfaces of mixing blades 42, 42, ..., Drive shaft 3
6 etc. are washed. And the kneading water provided for washing is
It is thrown into the drum of the concrete mixer truck CV from the discharge chute 39. In this way, the measured total amount of kneading water is put into the concrete mixer car CV. When the concrete material is charged and supplied to the drum of the concrete mixer car CV, the drum of the concrete mixer car CV is switched to a high speed for a predetermined time to operate. This completes the production of concrete. After the kneading is completed, the rotation speed is returned to a predetermined value, and the concrete mixer truck CV is operated to the concrete pouring site. Hereinafter, concrete is manufactured in the same manner.

It is obvious that the present invention can be implemented in various forms without being limited to the above embodiment. For example, although the cement is described as a cement not containing a mixture in the above-mentioned embodiment, the same can be done when an admixture material such as blast furnace slag fine powder or stone powder is mixed in the cement. Further, it is clear that the same operation can be performed even if an admixture is added to the kneading water. Therefore, the term "cement" in the claims of the present invention may include an admixture, and similarly, "mixing water" may include an admixture.

Further, in the above embodiment, the concrete material is described as being charged into the concrete mixer car CV at one time, but it may be carried out so as to be charged in a plurality of batches. When carrying out in this way, measuring tanks such as a gravel measuring tank 12 and a sand measuring tank 13 for a small concrete mixer vehicle, which are relatively inexpensive to obtain, are provided, and the large concrete mixer vehicle is divided into several batches. It is also possible to carry out by putting in.

The start time of adding gravel, sand, cement and kneading water and the end time of adding gravel, sand, cement, kneading water and washing water are not particularly limited, but the humidified cement is the inner peripheral wall of the concrete mixer truck. In order to avoid adhesion to the gravel, it is possible to add gravel or gravel and sand to some extent, and then add humidified cement. Further, humidification of the cement may be carried out to some extent, and the washing water may be added at about the same time as the addition of the measured gravel and sand is completed. Further, when the continuous humidifier 30 is washed, the washing can be completed in a short time. In this case, it is preferable that a cleaning nozzle is provided in addition to the humidification injection nozzle, and that the cleaning nozzle is also used for injection when cleaning.

Further, in the above-mentioned embodiment, the gravel and the sand are supplied in layers to the material charging hopper 1, but it is not always necessary to stack them in layers. Further, the sand can be supplied to the continuous humidifier 30 like the cement. Then, the cement and sand having different particle diameters are fed into the constant quantity supply unit 4
Since it is premixed in 5 and then humidified in the humidifying section 31, it is possible to suppress the phenomenon that the cement particles are aggregated, that is, so-called capillaries. Therefore, it is possible to obtain high-quality concrete by using a concrete mixer truck instead of using a mixer dedicated to concrete.

The concrete manufacturing apparatus can be implemented in various forms without being limited to the above-mentioned embodiment.
For example, it is obvious that the belt conveyor 10 may be replaced by another conveyor. Further, an electromagnetic vibrating feeder capable of controlling the flow rate can be provided at the discharge lower end portions of the gravel measuring tank 12 and the sand measuring tank 13. The electromagnetic vibration feeder may be configured to be suspended by, for example, a plurality of coil springs, and to be vibrated by an inverter.

Another embodiment of the arrangement of the continuous humidifier 30 is shown in FIG. Compared with the embodiment shown in FIG. 1 or FIG. 3, it is different in that the continuous humidifier 30 is arranged in the opposite direction. Therefore, elements similar to those of the above-described embodiment are designated by the same reference numerals and will not be described repeatedly. According to the present embodiment, the humidified cement or the humidified cement and sand is laminated on gravel and sand or gravel,
Then, the material is put into the concrete mixer truck from the material feeding hopper 1. It is also apparent that the effects described above can be obtained by the present embodiment as well, and that similar modifications can be made. In addition, in the embodiment shown in FIG. 4, in order to put the cleaning water into the concrete mixer vehicle,
The belt conveyor 10 is arranged in a downward slope on the downstream side of the continuous humidifier 30. According to this embodiment, the surface of the belt conveyor 10 is also cleaned.

[0031]

As described above, according to the present invention, when concrete material is put into a concrete mixer truck to obtain concrete in the concrete mixer truck, gravel and sand are directly put into the concrete mixer truck, Since the cement is humidified and then charged, when the cement is charged into the concrete mixer truck, the cement is not scattered as dust as dust. Therefore, according to the present invention, an effect peculiar to the present invention that concrete can be obtained at low cost without specially providing an expensive device such as a dust collector is obtained. In addition, when the cement is humidified in this way, it is humidified with a part of the predetermined kneading water, and the remaining kneading water is used to wash the continuous humidifying machine, preventing the cement from solidifying in the continuous humidifying machine. Moreover, since the washing water is poured into the concrete mixer truck, there is an effect that the washing water does not damage the environment. According to another invention,
Put concrete material into concrete mixer truck,
When concrete is obtained in the concrete mixer truck, the gravel is directly put into the concrete mixer truck, and the cement and sand are humidified and fed by the continuous humidifier, so in addition to the above effects, the agglomeration of cement particles It is possible to obtain the effect that high-quality concrete can be manufactured at low cost in a concrete mixer car without any problem.

[Brief description of drawings]

FIG. 1 is a front view schematically showing a concrete manufacturing apparatus according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing an embodiment of a continuous humidifier charging device of the concrete manufacturing apparatus shown in FIG.

FIG. 3 is a front view showing, in an enlarged manner, an arrangement state of a continuous humidifier charging device of the concrete manufacturing apparatus shown in FIG.

4 is an enlarged front view showing another arrangement state of the continuous humidifier of the concrete manufacturing apparatus shown in FIG. 1. FIG.

[Explanation of symbols]

1 Material Input Hopper 10 Belt Conveyor 12 Gravel Measuring Tank 13 Sand Measuring Tank 20 Cement Measuring Tank 30 Continuous Humidifying Charger 31 Humidifying Unit 40 Injection Nozzle 42 Mixing Blade 45 Constant Feeding Unit 49 Screw Flight 50 Cement Charge Chute 51 Canvas

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Satoshi Niisato             7-5-2 Higashi Narashino, Narashino, Chiba Prefecture Ohira             Within Western Machinery Co., Ltd. (72) Inventor Yoshihiro Aizawa             3-1-4 Wakakusa Town, Tomakomai City, Hokkaido Top             Le Aizawa High Pressure Concrete Co., Ltd. F-term (reference) 4G056 AA07 CB25 CD47 CD64

Claims (9)

[Claims] 1. A predetermined amount of gravel, sand, cement, kneading water,
A method of manufacturing, in which a concrete material comprising an admixture or the like is charged into a concrete mixer car, and concrete is manufactured in the concrete mixer car, wherein gravel and sand are directly charged into the concrete mixer car, and cement is continuous. Supply to a humidifier and mix and humidify with a predetermined amount of kneading water of a set amount necessary to obtain a predetermined quality of concrete, and then put into a concrete mixer truck, and then with the remaining kneading water used for humidification, A method for producing concrete, characterized in that the inside of a continuous humidifier is washed, and the kneading water used for washing is put into a concrete mixer truck to obtain concrete of a required quality. 2. A predetermined amount of gravel, sand, cement, kneading water,
A method for producing a concrete in a concrete mixer vehicle by introducing a concrete material such as an admixture into the concrete mixer vehicle, wherein the gravel is directly introduced into the concrete mixer vehicle, and the cement and the sand are continuous. Supply to a humidifier and mix and humidify with a predetermined amount of kneading water of a set amount necessary to obtain a predetermined quality of concrete, and then put into a concrete mixer truck, and then with the remaining kneading water used for humidification, A method for producing concrete, characterized in that the inside of a continuous humidifier is washed, and the kneading water used for washing is put into a concrete mixer truck to obtain concrete of a required quality. 3. A predetermined amount of gravel, sand, cement, kneading water,
A method for producing concrete in a concrete mixer vehicle by adding a concrete material such as an admixture to the concrete mixer vehicle, and the cement is supplied to a continuous humidifier to obtain concrete of a predetermined quality. The specified amount of kneading water required for mixing and humidifying is added, and then gravel or sand is stacked on the conveyor device such as a belt conveyor on top of the bottom layer and put into a concrete mixer truck, and then humidified. A method for producing concrete, characterized in that the inside of the continuous humidifier is washed with the remaining kneading water used, and then the kneading water used for washing is put into a concrete mixer truck to obtain concrete of a required quality. 4. A predetermined amount of gravel, sand, cement, kneading water,
A method for producing a concrete in a concrete mixer vehicle by adding a concrete material comprising an admixture to the concrete mixer vehicle, wherein the cement and sand are supplied to a continuous humidifier and a concrete of a predetermined quality is supplied. Mix and humidify with a predetermined amount of kneading water required to obtain, and stack on gravel on a conveyor device such as a belt conveyor and put into a concrete mixer truck,
Then, the inside of the continuous humidifier was washed with the remaining kneading water used for humidification, and the kneading water used for washing was put into a concrete mixer truck to obtain concrete of a required grade. Method. 5. A method for producing concrete, wherein the end of adding the kneading water used for cleaning according to any one of claims 1 to 4 is substantially the same as the end of adding other concrete materials. 6. A measuring tank for measuring concrete materials such as gravel, sand, cement, kneading water, and admixture, and cement is supplied from one upstream side and discharged from the other downstream side. It is equipped with a continuous humidifier and a control device, and set amounts of gravel, sand, cement and kneading water measured in these measuring tanks are put into a concrete mixer car, and concrete is manufactured by the concrete mixer car. In the concrete manufacturing apparatus, the continuous humidifier is provided with an injection nozzle on the upstream side of the inside thereof, and the controller controls the set amount of cement to the continuous humidifier. When it is continuously supplied and continuously supplied to the concrete mixer truck, a predetermined amount of kneading water of a set amount is supplied to the injection nozzle during the period. Controls, the concrete manufacturing apparatus and controls to supply the rest of the set amount of kneading water even after the end of the introduction of the cement to the continuous humidification turned machine. 7. A measuring tank for measuring concrete materials such as gravel, sand, cement, kneading water, admixture, etc., and cement and sand are supplied from one upstream side and discharged from the other downstream side. It is equipped with a continuous humidifier and a control device, and the set amount of gravel, sand, cement and kneading water measured in these measuring tanks is charged into the concrete mixer truck, and the concrete mixer truck drives the concrete. Is a concrete manufacturing apparatus adapted to be manufactured, wherein the continuous humidifier is provided with an injection nozzle on the upstream side inside thereof, and the control device is a set amount of cement and sand. When continuously supplied to the continuous humidifier and continuously supplied to the concrete mixer truck, a predetermined amount of kneading water of a set amount is continuously supplied to the injection nozzle during the period. Controls to supply, concrete manufacturing apparatus and controls to supply the rest of the set amount of kneading water even after the end of the introduction of the cement and sand to the continuous humidification turned machine. 8. The concrete manufacturing apparatus according to claim 6 or 7, wherein the cement measuring tank and the continuous humidifier are connected through a flexible canvas. 9. A continuous humidifier according to any one of claims 6 to 8, which comprises an upstream fixed quantity supply unit and a downstream humidification section, wherein the fixed quantity supply unit has a screw. And the concrete manufacturing apparatus in which a plurality of injection nozzles and a plurality of stirring blades are provided in the humidifying section.