JPH10278029A - Mixing equipment for lightweight granular material into viscous material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mixing equipment for a lightweight granular material into a viscous material for the manufacture of a large amount of a lightweight viscous material by mixing continuously in a short period of time a granular material of small specific gravity into the viscous material such as, for example, dredged earth or a mortar material. SOLUTION: A mixing equipment 10 for storing dredged earth as a viscous material is provided with a pair of extrusion rollers 13a and 13b along and below a discharge opening 12 in a manner of clamping the opening outside a hopper 11 with the opening 12 at its lower end, and a passage 30 for transferring a lightweight granular material on which at least a discharge nozzle section 32 is positioned is set in the hopper 11, and the granular material of small specific gravity is fed continuously onto the passage 30 by a screw feeder 40 as a lightweight granular material feeder and discharged from the discharge nozzle section 32 into the dredged earth and mixed therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mixing light-weight particulate matter into a viscous material, and more particularly to an apparatus for mixing styrene foam beads into a viscous material such as dredged soil or mortar material.

[0002]

2. Description of the Related Art Heretofore, there has been no dedicated device for mixing styrene foam beads into a viscous material such as dredged soil. Lightweight concrete in which styrene foam beads are mixed into a mortar material is already known.However, when a predetermined product is manufactured from such concrete, a mortar material is put into a conventionally well-known, for example, a two-axis mixer and the like. A predetermined amount of Styrofoam beads was put therein, mixed by stirring and mixing, and the mixture was filled in a mold.

[0003]

However, even if a mortar material is put into a conventional two-shaft mixer, a predetermined amount of styrene foam beads are put in the mortar material, and the mortar material is stirred, the styrene foam beads are evenly distributed in the mortar material. It takes a considerable time to mix into the mixture, and the mixture does not mix.
This is because the styrene foam beads have an extremely low specific gravity as compared with the mortar material, so that the beads rise to the upper part of the mortar material. The use of such a twin-screw mixer is therefore unsuitable for producing such lightweight concrete in large quantities.

[0004] Moreover, the twin-screw mixer is a so-called batch process in which a predetermined amount of mortar material and styrene foam beads are mixed and stirred, so that this is also unsuitable for producing this kind of lightweight concrete in large quantities. there were.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem. For example, granular materials having a low specific gravity are mixed in a short time and continuously into a viscous material such as dredged soil or mortar material. Another object of the present invention is to provide a device for mixing a light-weight granular material into a viscous material, which manufactures a large amount of a light-weight viscous material.

[0006]

SUMMARY OF THE INVENTION The present invention is an apparatus for mixing light-weight particulate matter into a viscous material, and is configured as follows to achieve the above-mentioned technical problem. That is, the mixing device of the present invention for mixing lightweight particulate matter into a viscous material contains a viscous material, a hopper having a discharge opening formed at a lower end, and a hopper outside the hopper below the opening and below the hopper. A pair of extraction rollers arranged along the opening so as to sandwich the opening, a light-weight granular material feeding passage body in which at least a discharge nozzle portion is positioned in the hopper, and a granular material having a small specific gravity to the passage body And a light-weight granular material supply device that continuously supplies the same.

<Specific Configuration of the Present Invention> The device for mixing lightweight particulate matter into a viscous material according to the present invention comprises the above-mentioned essential components, and the components are specifically as follows. Holds true. The specific constituent element is characterized in that the pair of extraction rollers are movable so as to be separated from each other.

In the above-described apparatus for mixing light-weight particulate matter into a viscous material according to the present invention, the light-weight particulate matter supply device for continuously supplying small-particle-weight particles to the passage body comprises a screw feeder. The discharge amount of the light-weight particulate matter discharged from the discharge nozzle of the passage body per unit time can be controlled by the rotation speed of the screw feeder device.

Further, in the apparatus for mixing lightweight particulate matter into a viscous material according to the present invention, the granular material having a small specific gravity has a diameter of about 1 to about 1 mm.
It is suitable for producing lightweight dredged soil containing styrofoam beads or lightweight mortar material containing styrofoam beads using 5 mm styrene foam beads and dredged soil or mortar material dredged from the water bottom as the viscous material.

According to the apparatus for mixing light-weight particulate matter into the viscous material according to the present invention, the discharge nozzle portion is positioned in the hopper in the light-weight granular material feeding passage body. When is stored, the discharge nozzle portion is buried in the viscous material. Then, the particulate matter having a small specific gravity, which is continuously supplied from the lightweight particulate matter supply device to the passage for feeding the lightweight particulate matter, is sequentially extruded from the discharge nozzle portion into the viscous material.

As described above, since the lightweight particulate matter is extruded from the discharge nozzle portion of the passage body into the viscous material, the viscous material immediately adheres to the surface of the lightweight particulate material emerging from the discharge nozzle portion,
The lifting is prevented. That is, since the lightweight particulate matter is forcibly discharged from the discharge nozzle portion of the passage body as if it were dragged with the movement of the viscous material, the contact pressure between each lightweight particulate matter and the viscous material at that time is large, As a result, the adhesive force of the viscous material to the surface of the lightweight granular material is increased, and the viscous material is effectively mixed into the viscous material.

The viscous material mixed with the light-weight particulate matter is extracted from the discharge opening formed at the lower end of the hopper with the rotation of the pair of extraction rollers. The viscous material containing the light-grained material extracted from the hopper as described above is further agitated by a suitable stirrer, so that the light-grained material mixed in the viscous material is evenly dispersed.

The amount of the light-weight particulate matter mixed into the viscous material is discharged from the discharge nozzle of the passage body by changing the rotation speed of the screw feeder, for example, by configuring the light-weight granular material supply device with a screw feeder device. It can be adjusted by controlling the amount of light particulate matter released per unit time.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a viscous material mixing apparatus according to the present invention. FIG. 1 is a front view showing a mixing device (hereinafter, referred to as a mixing device) 10 for mixing lightweight particulate matter into a viscous material according to an embodiment of the present invention, and FIG. 2 is a partial view of the mixing device 10 shown in FIG. FIG. 3 is a partial sectional view showing a main part of the mixing device 10 shown in FIG.

The mixing device 10 according to this embodiment includes a hopper 11 that accommodates a viscous material and has a discharge opening 12 formed at the lower end. The hopper 11 has a rectangular cross section and a pair of opposed side walls 11a, 1a.
1b is configured to gradually narrow the interval toward the lower end. Accordingly, the discharge opening 12 formed at the lower end is formed in an elongated rectangular shape. A pair of extraction rollers 13a and 13b is arranged outside the hopper 11 below the discharge opening 12 along the longitudinal direction so as to sandwich the opening 12.

The pair of extraction rollers 13a and 13b are
As shown in FIG. 1, the center rotation shaft is supported and supported by bearings 14 and 15 attached to another pair of opposite side walls 11c and 11d of the hopper 11, respectively. These bearing means 14, 15 are slidable laterally with respect to each other, so that the pair of extraction rollers 13a, 13b can be separated and approached, so that the width of the separation, that is, the substantial extraction width of the viscous material can be adjusted.

One end of the center rotation shaft of each extraction roller 13a, 13b is connected to a bearing means 14, 1 supporting it.
5 project outwardly from each other, with a sprocket 1
6 is attached. On the other hand, this sprocket 16
As shown in FIG. 4, a gear box 18 is installed on the gantry 17 almost directly above.

In the gear box 18, two parallel shafts 19 and 20 each having a bearing at both ends are arranged. The two shafts 19 and 20 in the gear box 18 are provided with sprockets 21 and 22 and gears 23 and 24 that mesh with each other.

The sprocket 16 mounted on the central rotation shaft of the extraction roller 13a and the shaft 19 in the gear box 18
The chain 25 is hung on the sprocket 21 in the first embodiment, and the sprocket 16 similarly mounted on the central rotation shaft of the extraction roller 13 b and the shaft 20 in the gear box 18.
The chain 25 is also hung on the sprocket 22 in the above. One of the two shafts 20 in the gear box 18
It is connected to a drive shaft 26 a of an electric motor 26 installed on the gantry 17 via a joint 27.

As a result, when the electric motor 26 is driven, the shaft 19 in the gear box 18 connected to the drive shaft 26a is rotated.
4 to another shaft 20. Therefore, the two shafts 19 and 20 in the gear box 18 rotate in opposite directions.

The rotation is directly applied to the chain 25.
Is transmitted to the pair of extraction rollers 13a and 13b via the. At this time, the electric motor 26 is connected to the pair of extraction rollers 13.
A and 13b are driven so as to rotate in opposite directions such that the viscous material is drawn out from the lower end opening of the hopper 11, that is, rotate in the direction indicated by the arrow 28 in FIG.

Incidentally, the hopper 1 in which the viscous material is stored
A passage 30 for feeding lightweight particulate matter is supported inside 1 so as to be suspended from the upper part of the hopper 11. 2 and 3, the width of the passage body 30 is slightly smaller than the width of the hopper 11 (the distance between the side walls 11c and 11d), and the thickness of the short side of the opening 12 of the hopper 11 is small. It has a rectangular cross section smaller than the side dimensions.

The passage body 30 is a rectangular cylindrical body.
Therefore, the internal space functions as the passage 31 of the granular material. A discharge nozzle 32 is formed at the lower end of the passage body 30. As shown in FIG. 5, the discharge nozzle portion 32 includes two passages 33a and 33b.
Are divided into three individual passages 34, 35, 36.

Each of these individual passages 34-36 is
0, each of which is branched so as to be independent in the vicinity of the lower end thereof, and has two independent branch passages 34a at its lowermost end.
36a is bent outward in the thickness direction and its openings 34b, 36
b is directed outward. The independent branch passage body 35a located at the intermediate portion extends downward as it is, but is formed so that its both ends are outwardly and slightly upward in the width direction at the lowermost end.

The lowermost end of the independent branch passage body 35a is formed in the shape of a repellent (batch) that plays a biwa, a shamisen, or the like. Accordingly, the opening 35b of the independent branch passage body 35a is directed straight downward, and both ends thereof are also directed outward in the width direction. The passage body 30 having such a configuration is provided with the discharge nozzle section 32.
The lower end of the hopper 11 is installed so as to be substantially located near the opening 12 at the lower end of the hopper 11 as is clear from FIG.

The upper end portion of such a passage body 30 is provided with a lightweight granular material supply device 4 for continuously supplying granular materials having a low specific gravity.
0 is connected to the outlet side end 41b of the “0” through a pipe 37. The lightweight granular material supply device 40 is constituted by a screw feeder device, and a feed screw 42 is rotatably arranged in a cylindrical housing 41. A hopper 43 that accommodates lightweight particulate matter is installed above one end of the housing 41, that is, above the introduction-side end 41a. ing.

One end of the center axis of the feed screw 42 of the screw feeder 40 projects from one end plate of the housing 41, and a sprocket (not shown) is attached to the end of the projected center axis. I have. An electric motor 44 for a screw feeder device is installed on the gantry 17, and a sprocket (not shown) is attached to a drive shaft thereof, and a chain is hung on these two sprockets. Thus, the feed screw 42 of the screw feeder device 40 is rotated by the electric motor 44.

Next, the operation of the mixing device 10 for mixing light and granular materials into a viscous material according to this embodiment will be described. Now, a case will be described in which styrofoam beads having a diameter of about 2 mm (hereinafter, simply referred to as “beads”) are continuously mixed into dredged soil dredged from a river or the sea floor as a viscous material. Therefore, in the mixing device 10 for mixing lightweight particulate matter into the viscous material in this embodiment, the dredged soil is stored in the hopper 11 in advance and is replenished intermittently.

A large amount of beads forcedly sent out by the screw feeder 40 pass through the pipe 37 and pass through the passage 3.
Introduced in 0. A large number of beads sent into the passage 31 of the passage body 30 enter the individual passages 34, 35, and 36 in the discharge nozzle portion 32 at the lower end. Since the discharge nozzle portion 32 is positioned in the hopper 11, it is buried in the dredged soil.

For this reason, the beads continuously supplied to the passage body 30 are supplied to the openings 34b, 3a of the independent branch passage bodies 34a, 35a, 36a in the discharge nozzle portion 32.
It is extruded sequentially from 5b and 36b into the dredged soil. At this time, the dredged soil in the hopper 11 is
The beads are mixed into the dredged soil sequentially from the openings 34b, 35b and 36b by the downward movement of the dredged soil in the hopper 11 because the beads are discharged from the opening 12 by the rotation of the a and 13b.

The beads that have come out of the discharge nozzle section 32 are embedded in the dredging soil that moves downward as described above.
The dredged soil immediately adheres to the surface of the bead, and its lifting is prevented. That is, since the beads are forcibly discharged from the discharge nozzle portion 32 of the passage body 30 so as to push the dredged soil, the contact pressure between each bead and the dredged soil at that time is large, and as a result, the dredged soil on the bead surface is consequently increased. Adhesive force increases and effectively mixes into dredged soil.

When the dredged soil moves toward the opening 12 at the lower end in the hopper 11, it is compressed near the discharge nozzle portion 32 of the passage body 30 so that the movement is not stopped as shown in FIGS. As shown, baffle bars 29 are mounted in the hopper so as to extend on and along both sides of discharge nozzle portion 32.

The dredged soil mixed with the beads is extracted from the opening 12 at the lower end of the hopper with the rotation of the pair of extraction rollers 13a and 13b. The beaded dredged soil extracted from the hopper 11 in this way is further agitated by a suitable stirrer thereafter, whereby uniform dispersion of the lightweight particulate matter mixed into the dredged soil is achieved. When changing the amount of beaded dredged soil extracted from the hopper 11, a pair of extraction rollers 1
By changing the distance between 3a and 13b, the substantial opening width of the opening 12 at the lower end of the hopper is adjusted.

The amount of beads mixed into the dredged soil can be adjusted by changing the rotation speed of the feed screw 42 in the light-weight granular material supply device, that is, in this embodiment, the screw feeder device 40. That is, the feed screw 42
Changes the rotation speed of the beads, the amount of beads released from the discharge nozzle 32 of the passage body 30 per unit time changes,
Thereby, the amount of beads mixed into the dredged soil per unit volume can be adjusted.

The styrofoam beads used in this embodiment have a diameter of about 2 mm, but this size is not particularly problematic. However, since the present invention effectively mixes particulate matter having a small specific gravity into a viscous material such as dredged soil or mortar, it is generally appropriate that the diameter of the beads is about 1 to 5 mm.

The individual passages 34 in the discharge nozzle section 32 of the passage body 30 for supplying the beads into the hopper.
36 to 36 and the size of the openings 34b to 36b are formed with appropriate dimensions so that the supplied beads are not clogged. Note that, in this embodiment, a case where styrene foam beads are mixed with a viscous material such as a dredging degree or mortar has been described, but a granular material having a small specific gravity made of a material other than styrofoam is similarly effective in the viscous material. It is needless to say that it can be mixed in.

If it is possible to continuously mix granular materials having a low specific gravity into the degree of dredging or mortar in this way, it becomes possible to mass produce lightweight concrete, for example, and to bury backfill soil at a predetermined position on the seabed. Lightweight dredged soil suitable as a backfill material having substantially the same specific gravity as seawater to prevent settlement during filling can be mass-produced in a short time.

[0038]

As described above, according to the apparatus for mixing lightweight particulate matter into a viscous material according to the present invention, a granular material having a small specific gravity can be produced in a short time in a viscous material such as dredged soil or mortar material. A large amount of lightweight viscous material can be manufactured by continuously mixing.

[Brief description of the drawings]

FIG. 1 is a front view showing an apparatus for mixing a lightweight particulate matter into a viscous material according to an embodiment of the present invention.

FIG. 2 is a left side view showing a device for mixing a light-weight granular material into a viscous material shown in FIG.

FIG. 3 is a partial cross-sectional view showing a main part of the device for mixing lightweight particulate matter into a viscous material shown in FIG.

FIG. 4 is a cross-sectional view showing the inside of a gear box for driving an extraction roller in the apparatus for mixing lightweight particulate matter into a viscous material according to the present invention.

FIG. 5 is a fragmentary perspective view showing, on an enlarged scale, a passage member constituting a device for mixing a lightweight particulate matter into a viscous material of the present invention and a discharge nozzle portion at a tip end portion thereof.

DESCRIPTION OF SYMBOLS 10 Device for mixing light-weight particulate matter into viscous material 11 Hopper 12 Opening 13a Extraction roller 13b Extraction roller 16 Sprocket 17 Mount 18 Gearbox 25 Chain 26 Electric motor 30 Passage body 31 Passage 32 Discharge nozzle portion 33a Partition wall 33b Partition wall 34 Individual passage 34a Branch passage body 34b Opening 35 Individual passage 35a Branch passage body 35b Opening 36 Individual passage 36a Branch passage body 36b Opening 40 Lightweight particulate matter supply device (screw feeder device) 41 Housing 42 Feed screw 43 Hopper

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenichi Yatsushiro 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Inventor Masaaki Miyata 2- 10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Corporation

Claims (4)

[Claims] 1. A hopper containing a viscous material and having a discharge opening formed at a lower end thereof, and disposed outside the hopper below and below the opening so as to sandwich the opening. A pair of extraction rollers, a light-granular material feeding passage body in which at least the discharge nozzle portion is positioned in the hopper, and a light-grained material supply device for continuously supplying small-grained materials having a low specific gravity to the passage body. An apparatus for mixing light-weight particulate matter into a viscous material, comprising: 2. The apparatus according to claim 1, wherein said pair of extraction rollers are movable so that they can be separated from each other.
A mixing device for mixing light-weight particulate matter into a viscous material as described in (1). 3. A light-granular material supply device for continuously supplying small-granules having a small specific gravity to the passage body is constituted by a screw feeder device, and the light-granular materials discharged from the discharge nozzle of the passage body per unit time. The apparatus for mixing light-weight particulate matter into a viscous material according to claim 1 or 2, wherein the amount of the discharged particles is controlled by the rotation speed of the screw feeder device. 4. A granular material having a small specific gravity has a diameter of about 1 to 5 mm.
4. The apparatus for mixing lightweight particulate matter into a viscous material according to claim 1, wherein the viscous material is a dredged soil or a mortar material dredged from a water bottom. .