WO2000053302A1

WO2000053302A1 - Continuous mixing plant

Info

Publication number: WO2000053302A1
Application number: PCT/JP1999/001114
Authority: WO
Inventors: Kazuie Yamada
Original assignee: Japan Institute Of Construction Engineering
Priority date: 1997-09-24
Filing date: 1999-03-08
Publication date: 2000-09-14
Also published as: EP1118380A1; DE69917794T2; EP1118380A4; EP1118380B1; DE69917794D1; KR20010043397A

Abstract

A continuous mixing plant suitable for manufacturing a mixed material continuously and in a short time by only supplying necessary materials continuously while weighing them and allowing the materials to drop under self-weights; comprising a continuous weighing/supplying means for keeping on supplying at least two kinds of materials to be mixed while weighing them individually and a mixing box for mixing materials supplied from the continuous weighing/supplying means; wherein a mixing box device is provided with a plurality of shape-changing passages having their cross-section shapes continuous changed from their inlets toward outlets and with a merge/division means provided between inlets and outlets of respective shape-changing passages and adapted to merge and divide materials passing through respective shape-changing passages, and is characterized in that mixing is effected by continuously charging respective materials and passing them through respective shape-changing passages toward outlets under self-weights.

Description

Specification

Continuous mixed plant branch surgery field

The present invention relates to a continuous mixing plant, and more specifically, for example, to continuously and quickly supply concrete while measuring required materials and drop these materials by their own weights. The present invention relates to a continuous mixing brand suitable for the present invention. Back technology

Conventionally, the batcher plant, which is an apparatus for producing concrete, measures cement, water, sand, gravel, admixture, etc., which are the raw materials of concrete, into a prescribed mixture, kneads them with a mixer, and sets them in a state where they do not solidify. This facility is used to manufacture concrete and is widely used in dam construction, civil engineering construction, ready-mixed concrete factories, and secondary concrete product factories.

Conventional batcher plants are roughly divided into a material storage section, a measuring section, a kneading section, and a loading section, and are divided into various types according to their arrangement.The most common type is shown in Fig. 11. It is tower-shaped as shown. The conventional tower-type batch plant 1 shown in Fig. 11 has a receiving room 2, a material storage tank 3 (a cement storage tank 3a, a sand storage tank 3b, a gravel storage tank 3c, and a water storage tank). 3d), measuring section 4 (cement measuring tank 4a, sand measuring tank 4b, gravel measuring tank 4c), concrete mixer 5, concrete hopper 6, etc. In general, the type in which the operation room 7 protruded from the measuring or mixing room 8 and the type in which the operation room 7 was separated from the plant were common.

As described above, most of the conventional batcher plants, including the tower type shown in Fig. 11, are of a batch processing type (each material is mixed and stirred at a predetermined amount, and this is repeated several times. Also repeated processing). The one in which each material is weighed and mixed and stirred each time is called a batch mixer.

However, such batch processing resulted in intermittent production of concrete and was not very efficient for continuous production of large quantities of concrete. Therefore, in the conventional tower batcher plant 1 as shown in Fig. 11, the mixer room 8 Attempts have been made to place two concrete mixers 5 inside each other and to use them alternately to ensure the continuity, ie continuity, of the concrete production as much as possible.

Even in batch processing, if a plurality of concrete mixers 5 are installed as described above and they are used sequentially, a certain degree of continuous production can be secured, but as the number of installed mixers 5 increases, the batcher There was a problem that the entire equipment became large.

By the way, although it is desired to continuously produce such a concrete, it is very difficult to optimally and continuously mix each material. Not yet realized. Also, even if such a continuous mixer is developed, the problem of how to measure each material that is continuously fed into the mixer is required to produce high-quality concrete. From this point of view, it was thought that effective continuous production of concrete was impossible. An object of the present invention is to solve such a conventional problem. For example, a necessary material is continuously supplied while being measured, and the material is continuously and simply dropped by its own weight. It is suitable for producing mixed materials in a short time. When this mixed material is concrete, high-quality concrete is obtained by continuously weighing each material with high accuracy and sending it to the mixer. Is to provide a continuous mixing plant that can continuously produce the same in a short time. Disclosure of the invention

The present invention is a continuous mixing plant, and has the following configuration in order to solve the above technical problem. That is, the continuous mixing plant of the present invention comprises a continuous metering / supplying means of a number corresponding to each of the aforementioned materials, which continuously supplies at least two types of materials to be mixed while continuously measuring them. The mixing box device comprises at least one mixing box device for mixing each material continuously supplied from the supply means. The mixing box device has an inlet at one end and an outlet at the other end. A plurality of deformed passages whose cross-sectional shape changes continuously from the inlet to the outlet, and extends in the axial direction; and provided between the inlet and the outlet of each of the deformed passages. Converging / dividing means for merging and dividing the respective materials passing through the respective deformation passages Wherein each material is continuously charged from the inlet portion and mixed by passing the deformed passageway toward the outlet portion by its own weight. The continuous mixing brand of the present invention further includes a measuring means for locally and every predetermined time while the material supplied from each of the continuous measuring and supplying means is continuously conveyed. It is also preferable that the continuous metering means is controlled by feedback in response to the signal from the metering means so as to increase the accuracy of the material supply amount.

In such a continuous mixing plant, at least two kinds of the materials to be mixed are an aggregate and a mortar or a cement paste, and can be applied as a plant for continuously producing concrete.

The continuous mixing plant of the present invention may further have the following configuration. That is, the continuous mixing plant of the present invention comprises: a main belt conveyor device for transporting aggregate; a continuous aggregate supply means for continuously supplying at least one kind of aggregate to the main belt conveyor device while measuring; It is installed at a downstream position of the conveyor belt to output a signal by continuously measuring the local amount of the aggregate moving on the conveyor belt of the conveyor device at a predetermined position. A first detecting device, which is installed downstream of the main belt conveyor device to which the aggregate has been supplied, and which continuously supplies a constant amount of mortar or cement paste to the main belt conveyor device. The main belt conveyor device, and at least one mixing box device disposed immediately below the discharge end of the main belt conveyor device, and continuously output from the first detection device. In response to the above signal, the continuous quantitative supply device is controlled by feedback to increase the accuracy of the supply amount of mortar or cement paste. Further, the mixing box device has an inlet at one end and an outlet at the other end. A plurality of deformed passages whose cross-sectional shape continuously changes from the inlet to the outlet, and extends in the axial direction, and between the inlet and the outlet of each of the deformed passages Converging / dividing means for merging and dividing the concrete passing through each of the deformed passages, supplying concrete from the inlet, and passing each of the deformed passages toward the outlet by its own weight. Characterized by being mixed by:

The continuous mixing plant of the present invention comprises the essential components described above. This is true even if the components are specifically as follows. The specific constituent elements are: a continuous aggregate supply means, a belt conveyor device for supplying the aggregate to the main conveyor device, and a material cutout for continuously supplying the aggregate to the belt conveyor device. The apparatus is installed at a downstream position of the belt conveyor apparatus so as to continuously measure the amount of the aggregate moving on the conveyor belt of the belt conveyor apparatus at a predetermined position and output a signal. A second detection device, receiving the signal continuously output by the second detection device, performing feedback control on the material cutting device and controlling the amount of aggregate supplied to the belt conveyor device; It is characterized by increasing accuracy. Further, in the continuous mixing plant according to the present invention, the material cutting device includes a vibration feeder, and a frequency of the vibration feeder is determined based on a signal continuously output from the second detection device. The amount of the aggregate to be cut out to the belt conveyor device is varied and feedback control is performed.

Further, in the continuous mixing plant of the present invention, one or both of the first and second detection devices are constituted by a belt scale device for continuously measuring the weight of each conveyor belt at a predetermined position. It is characterized by having.

Still further, in the continuous mixing plant of the present invention, the mixing box device is configured by connecting a plurality of elements substantially vertically, and each of the elements is respectively connected to an inlet end, an outlet end, and the inlet end. A plurality of the deformed passages reaching the outlet end; an arrangement pattern of an inlet portion of each of the deformed passages formed at the inlet end; and an arrangement pattern of an outlet portion of each of the deformed passages formed at the outlet end. Further, each of the element elements is connected in close contact with the outlet end and the inlet end of the adjacent element, and is connected to an inlet of each of the deformation passages at a connection side end of each element. A connection part with an outlet part constitutes the merging division means.

In the above-described continuous mixing plant of the present invention, in the element, rectangular openings are arranged side by side as an arrangement pattern of the inlets of the respective deformed passages, and rectangular openings are arranged as the arrangement pattern of the outlets. The openings are formed vertically and at least two types are provided which differ in the manner of communication between the respective inlets and the respective outlets of the respective deformed passages. It is also preferable that the components are alternately connected in the vertical direction. Further, in the continuous mixing brand of the present invention, an openable / closable cutout is provided at the lowermost element outlet of the mixing box device, and the amount of material falling by its own weight is adjusted to adjust mixing. It is also preferable to control the filling rate of the material in the deformed passage in each element of the box device.

According to the continuous mixing plant of the present invention configured as described above, each material is supplied while being continuously measured from the continuous supply means, and dropped into the mixing box device. That is, when a plurality of deformed passages continuously feed each material into the inner deformed passage from the upper inlet end of the mixing box device, they fall by their own weight and fall in each deformed passage.

Since the cross-sectional shape of each of the deformed passages changes continuously in the longitudinal direction, these materials falling in the deformed passages are mixed by being given a compressive deforming action. In addition, while these materials fall through the deformed passages, the materials passing through the deformed passages merge by passing through the dividing flow means, and are again divided (divided) into the respective deformed passages and fall. Is mixed by repeating this process.

In such a mixing box device, in general, by connecting a plurality of elements in the vertical direction so as to be stacked, the partial flow action can be necessarily obtained. As described above, the element includes an inlet U end, an outlet end, and a plurality of deformed passages extending from the inlet end to the outlet end, and an inlet portion of each deformed passage formed at the inlet end. Is different from the arrangement pattern of the outlet portion of each deformed passage formed at the outlet end.

If such elements are brought into close contact with the outlet end and the inlet end of the adjacent element, the connection between the inlet and the outlet of each deformed passage in each element becomes the junction dividing means. Become. In the case where rectangular shaped openings are arranged side by side as an array pattern at the entrance of each deformed passage and rectangular openings are formed at the top and bottom as the array pattern at the outlet, At least two types of elements with different communication modes between each inlet and each outlet of each deformed passage are manufactured, and these different types of elements are connected alternately in the vertical direction to form a mixing box device. With this configuration, a linear communication section from the upper inlet end to the lower outlet end of the mixing box device is formed. The mixing effect of the material falling from above is improved because it is reduced or eliminated.

For example, this continuous mixing blunt can be used as a blunt for producing concrete. In this case, when it is necessary to obtain a high-quality concrete, a feeder is detected by detecting the supply amount of the aggregate sent out from the material extracting device constituting the continuous aggregate supply means by using the detector. The accuracy of the supplied amount can be improved by controlling, or when at least one or more types of aggregate are sent to the mixing box device by the main conveyor device, the bone continuously sent by the main conveyor device It is preferable that the amount of the material is sequentially detected by the detection device, and the mortar or cement paste in an amount corresponding to the transport amount is supplied from the continuous quantitative supply device to the main conveyor device. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a configuration explanatory view schematically showing a continuous concrete manufacturing plant according to an embodiment of the present invention.

FIG. 2 is a front view, partially broken away, of a device for quantitatively supplying mortar or cement paste to a second main belt conveyor device in the continuous concrete manufacturing brand shown in FIG.

FIG. 3 is a perspective view showing a mixing box device used in the continuous concrete manufacturing brand shown in FIG. 1 in a state where two different types of elements are connected.

Fig. 4 shows how the cross section of the material to be mixed changes when two elements are connected as shown in Fig. 3 with respect to the area of the inlet-side end, intermediate part, and outlet-side end of each element. It is a process drawing shown in a model diagram.

FIG. 5 is a plan view schematically showing a state where each of the one type of element shown in FIG.

FIG. 6 is a plan view schematically showing a state in which each of the other types of the elements shown in FIG. 3 is viewed from the inlet-side end of each internal deformed passage.

FIG. 7 shows another possible mix for the continuous concrete production plant according to the invention. FIG. 7 is a perspective view showing an element in the box device, that is, an element having four deformation passages therein.

Fig. 8 is a model diagram showing how the cross section of the material to be mixed changes when the two elements shown in Fig. 7 are connected, with respect to the area of the inlet side end, intermediate part, and outlet side end of each element FIG.

FIG. 9 is a configuration explanatory view schematically showing another embodiment of the continuous mixing brand of the present invention when viewed from above.

FIG. 10 is a configuration explanatory view schematically showing still another embodiment of the continuous mixing plant of the present invention.

FIG. 11 is a configuration explanatory view schematically showing a conventional batch processing batcher plant. BEST MODE FOR CARRYING OUT THE INVENTION

The continuous mixing brand of the present invention will be described in more detail with reference to the embodiment shown in the drawings. FIG. 1 is an explanatory view schematically showing a configuration of a continuous concrete manufacturing plant according to an embodiment of the present invention, and FIG. 2 is a part of a continuous quantitative supply device for supplying mortar or cement paste to a main conveyor device. FIG.

Fig. 3 is a perspective view of the mixing box device used in the continuous concrete manufacturing brand shown in Fig. 1, showing two different types of elements connected, and Fig. 4 connecting two elements. FIG. 7 is a process diagram schematically showing, in a model diagram, how the cross section of the material to be mixed changes in the above case, with respect to the area of the inlet-side end, intermediate part, and outlet-side end of each element.

Further, FIG. 5 is a plan view schematically showing one type of element in the mixing box device as viewed from the inlet side end of each deformed passage, and FIG. 6 is another type of element. FIG. 7 is a plan view schematically showing a state in which each deformed passage inside is viewed from the end on the inlet side. FIG. 7 is an element, that is, an inside of another mixing box device usable for the continuous concrete production plant according to the present invention. FIG. 3 is a perspective view showing an element having four deformation passages.

Further, FIG. 8 shows a case where two elements shown in FIG. 7 are connected. FIG. 9 is a process diagram showing a model change of the cross section of the composite material for the inlet end, middle, and outlet end regions of each element. FIG. 9 shows another embodiment of the continuous mixing brand of the present invention. FIG. 10 is a schematic configuration view schematically showing the configuration when viewed from above, FIG. 10 is a schematic configuration diagram schematically illustrating another embodiment of the continuous mixing plant of the present invention, and FIG. 11 is a conventional batch processing type. FIG. 2 is a configuration explanatory view schematically showing a batcher plant of FIG.

The continuous concrete manufacturing plant 10 according to this embodiment includes a first main belt conveyor device 11 installed at an angle and a second main belt conveyor device 1 installed at a horizontal position. The two main belt conveyor devices 11 and 12 are installed so that the material can be continuously transferred and transferred.

The first main belt conveyor device 11 includes three continuous aggregate supply devices 13, 1, 4, and 15 that continuously measure and supply three types of aggregates. Are installed sequentially along the conveying direction of the locker device 11. Since each of the continuous aggregate supply devices 13 to 15 is substantially the same, one of them will be described. '

The continuous aggregate supply device 13 is provided with a belt conveyor device 13a, and a vibration feeder 13b as a material cutting device is installed at the loading end side of the belt conveyor device 13a. At the top of each feeder 13b, a hopper 13c for supplying aggregate to the feeder 13b is installed. Downstream from the vibratory feeder 13b in the belt conveyor device 13a, a belt scale device 13d is installed to measure the local weight of the transport belt that continuously moves with aggregate. ing.

This belt scale device 13d continuously detects the local weight of the conveyor belt moving on which the aggregate is placed by a load cell (not shown), and outputs the electric signal to a control device (not shown). )). The controller continuously calculates the weight value from the signal detected and output by the load cell, and multiplies the weight value by the speed of the conveyor belt to calculate, for example, the amount of aggregate that is being sent out every few minutes. I do. When the amount of aggregate supplied is equal to or less than the preset amount, the controller changes the operating frequency of the vibration feeder 13b to change its frequency, thereby cutting out or feeding the aggregate. Feedback control. In this way, three From the continuous aggregate supply devices 13 to 15 of the three types, three types of aggregates, for example, two types of gravel and sand of different sizes, It is sequentially supplied to one main belt conveyor device 11.

The three types of aggregates, which are sequentially stacked and transported on the transport belt of the first main belt conveyor device 11, are transferred to the second main conveyor device 12, which is installed horizontally. When the mortar or cement paste is moved to the carry-out end, the mortar or cement paste is continuously supplied onto the conveyor belt by the device 16 that continuously and quantitatively supplies the mortar installed on the way.

The continuous metering device 16 has a screw shaft 16b rotatably arranged inside a cylindrical casing 16a as shown in detail in FIG. The shaft 16b is rotated by a drive motor 16d installed on a gantry 16c. A hopper 16e is arranged at an upper portion on one end side of the casing 16a, and an outlet at a lower end thereof is connected to an input port formed in the casing 16a.

As a result, the mortar or cement paste put in the hopper 16 e enters the inside through the inlet of the casing 16 a, is pushed out of the casing 16 a by the rotating screw shaft 16 b, and is pushed out of the other end. From the outlet, it is supplied onto the conveyor belt via supply pipe 16f. When supplying this mortar or cement paste, a supply pipe 16 is required to continuously supply a more suitable amount of mortar or cement paste in proportion to the total amount of the three types of aggregate sent by the conveyor belt. A belt scale device 17 is installed upstream of the supply port of f.

Since the belt scale device 17 is substantially the same as the belt scale device 13d described above, the description of its configuration is omitted, but its operation is to transport three types of aggregates. The local weight of the conveyor belt in the second main conveyor belt device 12 is continuously detected by a load cell (not shown) of the belt scale device 17 and the control device 18 is connected as an electrical signal. Is output to The controller 18 continuously calculates, for example, the total supply amount of the three types of aggregate per unit time from the signals detected and output by the load cell, and from the calculation result, further corrects the mortar per unit time. Calculate the appropriate supply amount. The controller 18 changes the rotation speed of the drive motor 16 d according to the total amount of aggregate supplied per unit time. The rotation speed of the screw shaft 16b is changed to control the supply of mortar or cement.

As a result, even if the total supply per unit time of the three types of aggregate transported on the conveyor belt in the second main belt conveyor device 12 changes (i.e., the bones on the conveyor belt). It is possible to supply the appropriate amount of mortar or cement paste in proportion to the total amount of aggregate on the conveyor belt passing below the outlet of the supply pipe 16 f (even if the amount of wood is slightly increased or decreased). As a result, the quality of the produced concrete is further improved.

Immediately below the discharge end of the second main belt conveyor device 12, one mixing box device 20 is provided. The mixing box device 20 is basically composed of two types of elements 21A and 21B alternately connected in a vertical direction in total of six. FIG. 3 shows a state in which the two types of elements 21A and 2IB are connected for convenience of explanation.

Explaining the specific configuration of each element 21A and 21B, first, one type of element 21A has square end portions, and these end portions are connected to each other. Flange F for connection is formed.

A plurality of bolt holes f1 are formed in the flanges F, F, and adjacent elements are connected to each other by bolting their ends using the bolt holes # 1. The element 21 1 has two deformed passages 22 and 23 arranged side by side in the same direction. At one end of the element 21A, a partition wall 24 is provided at the center so as to form a vertically long opening on the left and right.

The vertically long left and right openings serve as the entrances 2 2 a and 23 a of the two deformed passages 22 and 23. A partition wall 25 is provided at the center of the other end of the element 21A so as to form a horizontally long opening vertically. The horizontally elongated upper and lower openings serve as the outlets 2 2 b and 2 3 b of the two deformed passages 22 and 23. That is, the partition wall 24 at the entrance end of the element 21A and the partition wall 25 at the exit end are arranged so as to be 90 degrees different from each other.

Therefore, the arrangement pattern of the two inlets 2 2a and 23 a of the deformed passages 2 2 and 23 is such that rectangular openings are formed side by side, and the two outlets 2 2b and 2 3b Arrangement The row pattern is formed by arranging rectangular openings vertically. Explaining the specific shape of the deformed passages 2 2 2 3, each of the deformed passages 2 2 and 23 has a cross-sectional shape from the inlet 22 a and 23 a to the outlet 22 b and 23 b. It is changing continuously.

Regarding the aspect of the change, the cross-sectional area at any position of each of the deformed passages 22 and 23 is the same from the inlets 22 a and 23 a to the outlets 22 b and 23 b. Only the shape changes continuously. In other words, the entrances 2 2a and 2 3a are rectangles that are long in the X direction, and the cross-sectional shape is square at the middle between the entrances 2 2a and 23 a and the exits 2 2b and 23 b. The outlets 22b and 23b are formed so as to be rectangular in the Y direction perpendicular to the X direction (see FIG. 3). The lengths of the deformed passages 22 and 23 are the same.

Therefore, the material to be mixed passing through each of the deformed passages 22 and 23 has its cross-sectional shape gradually changed from a rectangle long in the X direction to a square, and then gradually changed to a rectangle long in the Y direction. become. In this element 21A, the inlet 22a located on the left side in FIG. 3 and the outlet 22b located above communicate with each other through the deformed passage 22 and the inlet 23 located on the right side. a and the outlet 23 b located below communicate with each other through the deformed passage 23.

Next, the other type of element 21B is basically the same as the above-described element 21A, but in this element 21B, the entrance located on the left side in FIG. Portion 26a and the lower outlet portion 26b communicate with each other in the deformed passage 26, and the inlet portion 27a located on the right side and the outlet portion 27b located above are deformed passages 27. They communicate with each other. That is, in the element 21B, the communication mode between the element 21A and each inlet and each outlet of each deformed passage is different.

FIG. 3 shows a state in which such two types of elements 21 A and 21 B are connected alternately. In other words, the two types of elements 21 A and 21 B mentioned above are in close contact with the exit end of one element 21 A on the entrance side of the other element 21 B and the flanges F are adhered to each other. Then, they are connected by a bolt.

Therefore, at the connection between the two types of elements 21 A and 21 B, the outlet 22 b of the deformed passage 22 in one element 21 A is strong, and the other element 21 B Smell Of the deformed passage 26 that communicates with half of the inlet 26a of the other deformed passage 27 and half of the inlet 27a of the other deformed passage 27, and the outlet 2 of the deformed passage 23 at one element 21A. 3b communicates with the other half of the inlet 26a of the deformed passage 26 in the other element 21B and the other half of the inlet 27a of the other deformed passage 27. .

Therefore, half of the material to be mixed that has passed through each of the deformed passages 22 and 23 in one element 21A enters the respective deformed passages 26 and 27 of the other element 21B. However, when the material to be mixed passes through one deformed passage, it is divided in half at the connection between the two elements.

Therefore, the outlets and the inlets of the deformed passages formed at the outlet end and the inlet end, which are the connecting portions of the two elements 21 A and 21 B, join the mixed materials. This constitutes a dividing means. If such elements 21 A and 2 IB are alternately connected in series as shown in FIG. 1, a means for converging and dividing the materials to be mixed is formed at each connection.

Aggregate and mortar conveyed by the second belt conveyor device 12 are continuously dropped into the hopper 19 from the discharge end. Aggregate and mortar are mixed rough as they fall from the second belt conveyor device 12 into the hopper 19, where they are mixed in the first element 21A of the mixing box device 20. One entrance

Each of the deformed passages 22 and 23 enters from 22 a and 23 a and falls under its own weight in the mixing box device 20.

Next, the mixing process of the mortar and the aggregate passing through the mixing box device 20 will be described below with reference to FIG. This process diagram shows the change of the material to be mixed, that is, the aggregate and the mortar, when two elements 21A and 21B are connected (two stages). Inlet side end. The middle part and the exit side end are shown in a model diagram.

As can be understood from FIG. 4, the three types of aggregate and mortar charged into the hopper 19 are formed by two deformation passages 2 2, 2 3 at the inlet end of the first stage element 21 A. And the flow is consequently split into two, A and B. The cross section of each fluid body of the divided material to be mixed is a rectangle long in the X direction. Next, in the middle part of the first stage, both the cross-sectional shapes of the fluids A and B to be mixed are changed to square, and at the outlet end of the first stage, the length of the inlet side is longer. It changes into a rectangle long in the Y direction, which is 90 degrees different from the hand direction X. Therefore, the cross-sectional shape of each of the fluids A and B changes from a rectangle long in the X direction to a square long in the Y direction.

In the course of this change, the inner wall surfaces of the deformed passages 22 and 23 receive a continuous compression action. As a result, a continuous convection phenomenon occurs, particularly in the radial direction of the cross section, in the fluid itself of the material to be mixed, and thereby the first mixing action is performed.

Next, the partition wall 28 at the entrance end of the second stage element 21 B intersects at right angles with the partition wall 15 at the exit end of the first stage element. As shown in FIG. 4, the materials A and B to be mixed coming out of the outlet end of the eye element 21A are divided into AZB and AZB, respectively, as shown in FIG.

Then, the mixed material A / B flows in each of the deformed passages 26 and 27. That is, at the inlet end of the second-stage element 21 B, a part of the materials A and B merges in the deformed passages 26 and 27, respectively, and The cross section of the fluid body is a rectangle that is long in the X direction.

Next, in the middle part of the second stage, the cross section of the fluid body of the material to be mixed AZB is changed into a square shape as a whole, and at the outlet end, both are changed into a rectangle long in the Y direction. Also in the second stage, the mixed material A / B changes from a rectangle long in the X direction to a square—a rectangle long in the Y direction.

Then, in the change process, the inner wall surfaces of the deformed passages 26 and 27 are subjected to a continuous compression action. As a result, a continuous convection phenomenon occurs in the fluid itself of the material to be mixed, particularly in the inward and outward directions of the cross section, thereby performing the second mixing operation.

Although not particularly shown in the third stage, an imaginary line X1 is added to the final material to be mixed at the second end of the outlet side shown in FIG. 4 at the inlet end of the third stage. It is divided into right and left as shown, and merges like A / B / AZB. Thereafter, mixing is performed in the same manner as in the first and second stages. By the way, in this embodiment, as described above, two different types of elements F21A and 21B are connected alternately. The reason will be described. When the element 21A shown in FIG. 3 is viewed from inside of each deformed passage from one end thereof, as shown in FIG. 5, the portion excluding the shadow line passes directly, that is, a straight penetration. This is because the right entrance 22a at the entrance end communicates with the upper exit 22b at the exit end, and the left entrance 23 at the entrance end as described above. a communicates with the lower outlet section 23 b at the outlet end, and it is natural that the area where they partially overlap can be viewed directly from the inlet section to the outlet section. When viewed from the longitudinal direction of the outlet 21A, the passage portion existing in the area where the inlet portions 22a, 23a and the outlet portions 22b, 23b partially overlap each other is not mixed. It will pass through the stream of material with little deformation. Then, even when a plurality of elements 21 A having the same shape are connected, the state when the deformation path is moved from the end is not different from the state shown in FIG. Therefore, even if a plurality of elements 14 having the same shape are connected, the mixing effect is not so good.

On the other hand, for the element 21B, the area where the inlets 26a, 273 and the outlets 26, 27b overlap with the outlets 26, 27b is shown in Fig. 6 due to the same principle as described for the element 21A. This is the part excluding the shadow line shown. This is different from element 21A, in that the left inlet 26a at the inlet end communicates with the lower outlet 26b at the outlet end and the right inlet 26b at the inlet end. This is evident from the fact that the inlet 27a communicates with the upper outlet 27b at the outlet end.

Therefore, assuming that these two types of elements 21A and 21B were connected as shown in Fig. 3, if there were 11 deformed passages from the inlet end, Fig. 5 and Fig. 6 were superimposed. As a result, it becomes impossible to directly see the exit from the entrance. That is, the material to be mixed that has entered from the inlet does not flow to the outlet in a so-called straight manner, and as a result, the mixing effect is further enhanced.

The element used in the above-described embodiment was provided with two deformed passages 22 and 23 or 26 and 27, but as shown in FIG. A mixing box device can also be configured by connecting elements 30 including 1, 32, 33, and 34. The concept of this element 30 is the same as that of the above-mentioned elements 21A and 21B. The opening at the end is square as a whole, and a flange F for connection is provided around the element. Three partitions 3 5, 3 6, 3 7 to form four openings that are long in the direction, and the entrances 3 1 a, 3 2 a, of the four deformed passages 3 1 to 3 4

33a and 34a.

On the other hand, the exit side end of this element 30 has three partition walls 38, 3 so as to form a long opening in the Y direction, which is 90 degrees different from each entrance of the entrance side end. 9,

40, and are defined as outlets 31b, 32b, 33b, 34b of the respective deformed passages.

And as seen in FIG. 7, the inlet 3 1 a of the deformed passage 31 communicates with the second outlet 3 1 b from the top, and the inlet 3 2 a of the deformed passage 32 is the uppermost outlet Part 3 2b, the inlet part 33a of the deformed passage 33 is connected to the lowermost outlet part 33b, and the inlet part 34a of the deformed passage 34 is the third outlet from the top. It communicates with part 3 4b.

The change in the cross-sectional shape in the longitudinal direction of each of the deformed passages 31, 32, 33, and 34 is basically the same as the case of the elements 21A and 2IB shown in the previous embodiment. is there. However, the outline of the entire element 30 is different because it has four deformed passages.

FIG. 8 shows a process diagram of a mixing method using a mixing box device configured by connecting two of the elements 30 (in this example, connecting elements 30 of the same shape).

At the inlet end of the first-stage element 30, the material to be mixed that has entered the rectangular inlet portion 31 a to 34 a in the X direction is B when exiting the outlet portion 31 b to 34 b. The rows are divided into A, D, and C, and at the exit side end of the element 30 in the second stage, the rows join together in a state of 16 layers long in the X direction. Here, the imaginary line X 3 indicates the next division line at the third stage.

The aggregate and the mortar or cement paste properly weighed in this way are continuously put into the mixing box device 20 and are mixed optimally, so that a very high-quality concrete is continuously obtained. It can be manufactured in a special way. The continuous concrete manufacturing plant 10 of the above-described embodiment is provided with a belt scale device in the continuous aggregate supply device 13 to 15 in order to manufacture a relatively high-quality concrete as described above. lb is installed to continuously monitor the amount of aggregate supplied and to perform feedback control. Similarly, the supply of mortar is also extremely accurate so as to be proportional to the total amount of aggregate being conveyed. Although adjustment was made, such a belt scale device may be appropriately installed according to the required quality of the concrete.

When materials such as aggregate and mortar are allowed to pass through the mixing box device 20, the materials do not always pass while filling the deformed passages of each element. If the material to be mixed does not pass through the deformation path of each element while filling it, depending on the type of these materials, it may not be efficiently subjected to shearing or compression during passing through the mixing box device. It is possible, and as a result, there may be a difference in the kneading state.

Therefore, an openable / closable cut gate (not shown) is provided at the bottom of the element outlet of the mixing box device 20 to adjust the discharge amount of the material falling by its own weight, so that each of the mixing box devices can be controlled. It is also preferable to control the filling rate of the material in the deformation passage in the element so that the mixing can be performed more effectively.

As means for adjusting the supply of the aggregate and the mortar or cement paste, there are various known means other than the belt scale device, for example, an aggregate continuously transferred by a conveyor belt. The quantity per unit time (volume) can be sequentially detected by a plurality of phototube devices, or the supply amount of material can be accurately controlled by using a known feed conveyor device. Can be. Further, in the continuous mixing plant in the above-described embodiment, one or more materials are conveyed while being sequentially stacked on a conveyance belt of the main conveyer device, and further, the total amount of each of these materials is determined, and the final amount is determined. Although the materials are put on the conveyor belt and are put into the mixing box device, the present invention is not limited to such an embodiment.

That is, for example, as shown in Fig. 9, each continuous aggregate supply device 13, 14, 15, and mortar or cement paste are supplied around a hopper 19 installed above the mixing box device 20. The continuous quantitative supply device 16 may be installed independently, and each material may be continuously charged into the hopper 19 while measuring each material from these devices. If necessary, each continuous aggregate supply device 13, 14, 15, and continuous quantitative supply device 装置 A scale is installed on the transport path from 6 to the hopper 19, and as described above, each continuous aggregate supply device 1 It is also possible to increase the material supply accuracy by performing feedback control on 3, 14, 15 and the continuous quantitative supply device 16.

Further, in the above-described embodiment of the present invention, an example has been described in which an aggregate and mortar are mixed to produce a concrete, but the present invention is not limited to such a material. The cement paste and the cement paste may be supplied while being continuously measured, and then charged into the mixing box device.

In the above-described embodiment, the term “aggregate” is used to describe the material to be mixed. ^ The term “aggregate” used here refers to an independent type such as sand or gravel. Not limited. That is, a premix of sand, gravel, or the like, or a premix of sand, gravel, or the like, or a mixture thereof and cement powder in advance is called a premix. It is used in the concept including. Therefore, the premix may be supplied while being continuously measured and charged into the mixing box device.

In particular, when a mixture of sand, gravel, etc., and a premix of cement powder, which is premixed, is continuously metered and fed into the mixing box device, the two mixes are mixed as shown in Fig. 10. The box device 20 can be installed step by step. That is, the first-stage mixing box device is continuously supplied with sand, which is fine aggregate, gravel, which is coarse aggregate, and cement powder, respectively, by using metering devices 113, 114, 115. Mix at 20 to produce a premix.

Next, water is continuously added to the pre-mitters by a water supply device 116 and mixed in a second-stage mixing box 20. Even through such a process, it is possible to continuously produce concrete. As can be understood from this, in the present invention, a plurality of mixing box devices can be installed stepwise as necessary to mix each material while sequentially supplying the material.

The surface water management of coarse and fine aggregates, including the case where water is added to the above-mentioned premix, is necessary for the production of high-quality concrete. Water supply control device and moisture detection means are required for continuous mixing It is also preferable to add them according to. -In addition, each of the embodiments of the present invention described above is a plant for continuously producing concrete, but the present invention weighs and supplies each material to be mixed and continuously mixes them. Needless to say, it can be used in various cases where a product is obtained by stirring. Such uses include, for example, the production of livestock compound feed, or horticultural soil (mixed soil of soil and chicken manure).

As described above, according to the continuous mixing plant of the present invention, the production of the mixed material can be performed continuously and at a relatively high speed with a relatively simple apparatus. Significant improvements can be made, thus enabling mass production of this type of mixed material.

Further, according to the continuous mixing plant of the present invention, it can be used for the continuous production of concrete, in which case the continuous measurement of each material, which has conventionally been difficult in the continuous production of concrete, can be performed continuously. An excellent effect is achieved in that high-quality concrete can be produced continuously and at high speed because it is sent to a mixer with a unique structure with high precision. Industrial applicability

The present invention is an apparatus for continuously mixing and stirring several kinds of materials, for example, mixing cement and aggregate in a concrete manufacturing brand, mixing livestock compounded feed, or producing horticultural soil. Therefore, it is useful for mixing soil and chicken dung.

Claims

The scope of the claims -

(1) At least two types of materials to be mixed are continuously supplied while being continuously measured, and the number of continuous measuring and feeding means corresponding to each of the materials is continuously supplied from the continuous measuring and feeding means. Consists of at least one mixing box device for mixing each material,

The mixing box device has a plurality of inlet sections formed at one end and an outlet section at the other end, a cross-sectional shape continuously changing from the inlet section to the outlet section, and extending in the axial direction. A deformation passage, provided between the inlet portion and the outlet portion of each of the deformation passages, and merging division means for merging and dividing each material passing through each of the deformation passages; A continuous mixing plant wherein materials are continuously charged and mixed by passing the deformed passages toward the outlet portion by their own weight.

(2) The apparatus further comprises a weighing means for locally and every predetermined time while the material supplied from each of the continuous weighing and feeding means is being continuously fed, and receiving a signal from the weighing means. 2. The continuous mixing plant according to claim 1, wherein said continuous metering / feeding means is fed back to increase the accuracy of the material feeding rate.

(3) The continuous system according to claim 2, wherein the at least two kinds of materials to be mixed are aggregate and mortar or cement paste, and are applied as a plant for continuously producing concrete. Mixed brand.

(4) a main belt conveyor device for transporting the aggregate, continuous aggregate supply means for continuously supplying at least one type of aggregate to the main belt conveyor device while weighing the aggregate, and being mounted on a transport belt of the main belt conveyor device. A first detector installed at a downstream position of the conveyor belt to continuously measure a local amount of the aggregate moving at a predetermined position and output a signal; A continuous quantitative supply means installed downstream of the main belt conveyor device to which the material has been supplied, and continuously supplying a constant amount of mortar or cement paste to the main belt conveyor device; It consists of at least one mixing box device located just below the discharge end,

Upon receiving the signal continuously output from the first detection device, the continuous quantitative Feeding device is controlled by feedback to improve the accuracy of mortar or cement paste supply,

Further, in the mixing box device, an inlet portion is formed at one end and an outlet portion is formed at the other end, and a plurality of cross-sectional shapes continuously change from the inlet portion to the outlet portion, and extend in the axial direction. A deforming passage, and a merging and dividing means provided between the inlet and the outlet of each of the deforming passages to merge and split the concrete passing through each of the deforming passages. A continuous mixing blunt, wherein the mixing is performed by charging and passing the deformed passages toward the outlet portion by their own weight.

(5) The continuous aggregate supply means includes: a belt conveyor device that supplies the aggregate to the main conveyor device; and a material cutout device that continuously supplies the aggregate to the belt conveyor device. It is installed at a downstream position of the belt conveyor device to output a signal by continuously measuring the amount of the aggregate moving on the transport belt of the belt conveyor device at a predetermined position. A second detection device, receiving the signal continuously output by the second detection device, performing feedback control of the material cutting device and controlling the amount of aggregate supplied to the belt conveyor device; 5. The continuous mixing plant according to claim 4, wherein accuracy is increased.

(6) The material cutting device includes a vibratory feeder, and changes the frequency of the vibratory feeder based on a signal continuously output from the second detection device to change the frequency of the vibratory feeder. 6. The continuous mixing plant according to claim 5, wherein a feed-back control of a cut-out amount to the cooling device is performed.

(7) Either or both of the first and second detection devices are constituted by a belt scale device for continuously measuring the weight of each conveyor belt at a predetermined position. 7. The continuous mixing blunt according to claim 6, wherein:

(8) The mixing box device is configured by connecting a plurality of elements substantially vertically, each of the elements being an inlet end, an outlet end, and a plurality of the deformed passages extending from the inlet end to the outlet end. Wherein the arrangement pattern of the entrances of the respective deformed passages formed at the entrance end is different from the arrangement pattern of the exits of the respective modified passages formed at the exit end. Ka ^ Adjacent element The outlet end and the inlet end of the element are connected in close contact with each other, and a connecting portion between an inlet and an outlet of each of the deformed passages at a connection side end of each of the elements constitutes the merging division means. The continuous mixing plant according to claim 7, wherein

(9) In the element, rectangular openings are arranged side by side as an arrangement pattern of the entrances of the respective deformed passages, and rectangular openings are formed up and down as an arrangement pattern of the exits. Each of the deformed passages has at least two types of communication modes different from each other at the inlet and the outlet, and the mixing box device is configured by alternately connecting the different elements of this type in the vertical direction. 9. The continuous mixing plant according to claim 8, wherein

(10) An openable and closable cut gate is provided at the lowermost element outlet of the mixing box device, and the discharge amount of the material falling by its own weight is adjusted to make each of the mixing box devices. 10. The continuous mixing plant according to claim 9, wherein the filling rate of the material in the deformation passage in the element is controlled.