JPH10278030A - Nozzle device for mixing lightweight particulate matter into viscous material - Google Patents

Abstract

(57) [Summary] [PROBLEMS] For example, a low-density granular material is mixed into a viscous material such as dredged soil or mortar material in a short time and continuously.
To provide a nozzle device for mixing a light-weight granular material into a viscous material capable of producing a large amount of a light-weight viscous material. SOLUTION: This nozzle device 30 discharges and mixes a particulate matter having a small specific gravity into a flowing viscous material, and the nozzle device is used for a lightweight particulate matter supply device that continuously supplies a particulate matter having a small specific gravity. One end is connected to the passage body 31 having one passage 31a formed therein, and the other end of the passage body 31 is formed and buried in a viscous material. The plurality of passages 31a are partitioned by partitions 33a, 33b. Individual passages 34-3
6, each of the individual passages is branched as a thin tube so as to be independent at the lower end of the discharge nozzle portion 32, and a branched and independent thin tube 34a,
At the lowermost ends of the holes 35a, 36a, the openings 35b, 35b are bent so as to extend in the direction of the entire cone.
b and 36b are directed to a wide range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[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. It is an object of the present invention to provide a nozzle device for dispersing and mixing light-weight particulate matter into a viscous material capable of producing a large amount of a light-weight viscous material.

[0006]

SUMMARY OF THE INVENTION The present invention is a nozzle device for mixing a light-weight granular material into a viscous material, and is configured as follows to achieve the above-mentioned technical problem. That is, the present invention is directed to a nozzle device that discharges and mixes particulate matter having a small specific gravity into a flowing viscous material, wherein the nozzle device continuously supplies particulate matter having a small specific gravity to a lightweight particulate matter supply device. One end is connected, a passage body in which one passage is formed, and the other end of the passage body is formed and buried in the viscous material, and the passage is partitioned by a partition wall to form a plurality of individual passages. And each of the individual passages is branched as a thin tube so as to be independent from each other in the vicinity of the lower end of the passage body, and at the lowermost end of the branched and independent thin tube, the entire tube extends in a cone shape. It is characterized by being bent to direct each of the openings to a wide range.

<Specific Structure in the Present Invention> The nozzle device of the present invention for mixing a light-weight particulate matter into a viscous material is composed of the essential components described above. It is established even if there is. The concrete component is that the passage in the passage body has a rectangular cross section,
In addition, the individual passage of each of the thin tubes has a rectangular cross section formed by a plurality of the partition walls so as to be formed to have substantially the same width as the passage in the passage body.

In the above-described nozzle device for mixing light-weight particulate matter into a viscous material according to the present invention, each of the thin tubes has a large number of cylindrical shapes, and the lowermost end of each of the cylindrical thin tubes is entirely conical. It is also preferable that the opening is bent so as to be directed in a direction in which the opening spreads in a wide direction.

Further, in the nozzle device according to the present invention for mixing a light-weight granular material into a viscous material, styrene foam beads having a diameter of about 1 to 5 mm are used as the granular material having a small specific gravity, and the dredged soil dredged from the water bottom as the viscous material. Alternatively, it is suitable for producing a lightweight dredged soil containing styrofoam beads or a lightweight mortar material containing styrofoam beads using a mortar material.

According to such a nozzle device for mixing light-weight particulate matter into a viscous material according to the present invention, the discharge nozzle constituting the lower end of the passage body is buried in the flowing viscous material, and The lower end is composed of a plurality of thin tubes, and at the lowermost end of these thin tubes, the whole is bent so as to extend in a conical direction and each opening is directed to a wide range. The granular material having a small specific gravity, which is supplied to the light-weight granular material feeding passage body, is extruded from the discharge nozzle portion while sequentially diffusing 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. In other words, the light-grained particles are forcibly dispersed and discharged from the discharge nozzle portion of the passage body as if they were dragged with the movement of the viscous material, and the contact pressure between each light-grained particle and the viscous material at that time is large. As a result, the adhesive force of the viscous material on the surface of the lightweight granular material is increased, and the viscous material is effectively mixed into the viscous material.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a nozzle device for mixing a light-weight particulate material into a viscous material according to the present invention. FIG. 1 is a partial perspective view showing a nozzle device (hereinafter, referred to as a nozzle device) 30 for mixing lightweight particulate matter into a viscous material according to an embodiment of the present invention,
FIG. 2 is a device (hereinafter, referred to as a mixing device) 1 for mixing a light-weight particulate matter into a viscous material having the nozzle device 30 shown in FIG.
0, FIG. 3 is a left side view showing the mixing device 10 shown in FIG. 1 partially cut away, and FIG. 4 is a partial cross-sectional view showing a main part of the mixing device 10 shown in FIG. FIG. 5 is a sectional view showing a gear box constituting the mixing device 10 shown in FIG. It is.

First, an apparatus 10 for mixing lightweight particulate matter into a viscous substance will be described with reference to FIGS. The mixing device 10 accommodates a viscous material, and has an opening 1 for discharging at a lower end.
2 is provided with a hopper 11 formed therein. The hopper 11 has a rectangular cross-sectional shape, and a pair of opposed side walls 11a and 11b gradually narrows the gap 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. 2, 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 central 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. 5, a gear box 18 is installed on the gantry 17 almost directly above.

In this gear box 18, two parallel shafts 19 and 20 each having both ends bearing 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 pulled out from the lower end opening of the hopper 11, that is, rotate in the direction indicated by the arrow 28 in FIG.

By the way, the hopper 1 in which the viscous material is stored
Inside 1, the nozzle device 30 is supported so as to be suspended from the upper part of the hopper 11. The nozzle device 30 includes a passage body 31 for sending lightweight particulate matter, and the passage body 31 has a lateral width greater than the width of the hopper 11 (the interval between the side walls 11c and 11d), as is apparent from FIGS. It has a somewhat smaller width and a rectangular cross-section whose thickness is smaller than the short side dimension of the opening 12 of the hopper 11.

The passage body 31 is a rectangular cylindrical body as shown in FIG. 1, so that its internal space functions as a passage 31a of a granular body. The lower end of the passage body 31 forms a discharge nozzle section 32. This discharge nozzle part 32
In one embodiment, one passage 31a is divided into three individual passages 34, 35, 36 by two partition walls 33a, 33b.

Each of these individual passages 34 to 36 is formed by a passage body 3
In the vicinity of the lower end of 1, three thin tubes are branched so as to be independent from each other, and these independent thin tubes 34 a, 3 a
6a is bent outward in the thickness direction at its lowermost end, and its openings 34b and 36b are directed outward. The independent thin tube 35a located in the middle portion extends downward as it is, but is formed so that its both ends are spread outward in the width direction and slightly upward at the lowermost end.

The lowermost end of the independent thin tube 35a is formed in the shape of a repellent end 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 31 having such a configuration is installed such that the lowermost end of the discharge nozzle portion 32 is substantially located near the opening 12 at the lower end of the hopper 11 as apparent from FIG.

The upper end of such a passage body 31 is provided with a lightweight granular material supply device 4 for continuously supplying granular materials having a small 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 device 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 40 is rotated by the electric motor 44.

Next, the operation of the nozzle device 30 for mixing the lightweight particulate matter into the viscous material according to this embodiment will be described with reference to the mixing device 10.
The operation will be described together with the operation. 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.
1 is introduced. A large number of beads fed into the passage 31a of the passage body 31 enter the individual passages 34, 35, and 36 separately at 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.

Therefore, the beads continuously supplied to the passage body 31 are supplied to the openings 34b, 35b, 35b, 35b,
It is extruded sequentially from 36b into the dredged soil. At this time, the dredged soil in the hopper 11 is removed by a pair of extraction rollers 13a and 13a.
The beads are discharged from the opening 12 by the rotation of b, and the beads are sequentially mixed into the dredged soil from the openings 34b, 35b, 36b by the downward movement of the dredged soil in the hopper 11.

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 31 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 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 31 so that the movement does not stop. 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 manner is further agitated by a suitable kneading machine thereafter, whereby uniform dispersion of the light-weight 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 lightweight granular material supply device, that is, the screw feeder device 40 in this embodiment. 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 31 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 had 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 32 of the passage body 31 for supplying the beads into the hopper are provided.
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 particulate matter having a low specific gravity into dredged soil and mortar in this way, mass production of, for example, lightweight concrete becomes possible, and backfill soil will be placed 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.

FIG. 6 shows a nozzle device 50 according to another embodiment of the present invention for mixing lightweight particulate matter into a viscous material.
This nozzle device 50 also has a passage body 51 for feeding lightweight particulate matter similar to the passage body 31 described above. This passage body 51 is also a cylindrical body, and therefore, its internal space functions as a passage 51a of the granular body. The lower end of the passage body 51 constitutes a discharge nozzle section 52. This discharge nozzle section 52
One passage 51 a is divided into a number of individual passages 54 having a substantially circular cross section by a partition wall 53.

Each of the individual passages 54 is branched into a large number of small tubes having a cylindrical shape so as to be independent from each other in the vicinity of the lower end of the passage body 51. Each opening 56 is bent so as to be directed in a widening direction so as to direct each opening 56 in a wide range. The upper end portion of the passage body 51 is connected to the outlet side end portion 41b of the lightweight particulate matter supply device 40 that continuously supplies the particulate matter having a small specific gravity by the pipe 37.
This is the same as in the above-described embodiment.

[0039]

As described above, according to the nozzle device of the present invention for mixing lightweight particulate matter into a viscous material, 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. In addition, a large amount of lightweight viscous material can be manufactured by continuously mixing.

[Brief description of the drawings]

FIG. 1 is a perspective view partially showing a nozzle device for mixing a light-weight granular material into a viscous material according to an embodiment of the present invention.

FIG. 2 is a front view showing a device for mixing a light-weight granular material into a viscous material provided with the nozzle device shown in FIG. 1;

FIG. 3 is a left side view showing a device for mixing the light-weight particulate matter into the viscous material shown in FIG.

FIG. 4 is a partial cross-sectional view showing a main part of a device for mixing lightweight particulate matter into a viscous material shown in FIG. 2;

FIG. 5 is a cross-sectional view showing the inside of a gear box for driving an extraction roller in the apparatus for mixing light-weight particulate matter into a viscous material shown in FIG. 2;

FIG. 6 is a perspective view similar to FIG. 1 showing a fragmentary nozzle device for mixing a light-weight particulate matter into a viscous material according to another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 Device for mixing light-granular materials into viscous material 11 Hopper 12 Opening 13a Extraction roller 13b Extraction roller 16 Sprocket 17 Mount 18 Gear box 25 Chain 26 Electric motor 30, 50 Nozzle device 31 for mixing light-granular materials into viscous material 51 passage body 31a, 51a passage 32, 52 discharge nozzle section 33a partition wall 33b partition wall 34 individual passage 34a narrow tube 34b opening 35 individual passage 35a, 55 narrow tube 35b opening 36 individual passage 36a narrow tube 36b opening 40 lightweight particulate feeder (screw feeder) ) 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 nozzle device for discharging and mixing particles having a small specific gravity into a flowing viscous material, wherein the nozzle device has one end connected to a lightweight particle supply device for continuously supplying particles having a small specific gravity. And a passage body in which one passage is formed, and the other end of the passage body, which is buried in the viscous material, and the passage is partitioned by a partition wall to form a plurality of individual passages. And each of the individual passages is branched as a thin tube so as to be independent from each other in the vicinity of the lower end of the passage body. A nozzle device for mixing light-weight particulate matter into a viscous material, which is bent so that each opening thereof is directed in a wide range. 2. The passage in the passage body has a rectangular cross section, and the individual passage of each of the thin tubes is formed by a plurality of the partition walls so as to be formed to have substantially the same width as the passage in the passage body. 2. The nozzle device according to claim 1, wherein the light-weight granular material is mixed into the viscous material. 3. Each of the thin tubes has a large number of cylindrical shapes, and the lowermost end of each of the cylindrical thin tubes is bent so as to extend in a cone-like direction as a whole, and each opening thereof is directed to a wide range. The nozzle device according to claim 1, wherein the light-weight granular material is mixed into the viscous material. 4. The granule having a small specific gravity has a diameter of about 1 to 5
mm, and the viscous material is a dredged soil or a mortar material dredged from the water bottom, and the light-weight particulate matter is mixed into the viscous material according to any one of claims 1, 2 and 3. Nozzle device.