JPH09195311A - Excavated soil regenerating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of lodging of stones and soil and to perform mixture transfer with high efficiency by a method wherein in a rotary shaft crossing the movement direction of a mixture at right angles, a plurality of agitation rotors are arranged at the rotary shafts different from each other. SOLUTION: Three agitation rotors 4 are provided, each agitation rotor is provided with a number of rotary blades 5, the agitation rotor at a left end is rotated in a counterclockwise direction, and other agitation rotors are alternately reversed. An introduction port 6 is formed in the upper part of a left rotor and a discharge port 7 is formed in the upper part of a right rotor. A body is designed in such a manner that the rotation volume of the agitation rotor is rendered approximately equal to a body volume. When a mixture of soil and a curing material is introduced through the introduction port 6, the mixture is transferred to below and rearward by the first agitation rotor. When the mixture is transferred to the vicinity of the next agitation rotor, the mixture is scraped upward and a part of the mixture is mixed as it is returned to a front. To improve mixing the output side is slightly raised, and reversely, to increase a transfer speed the output side is lowered.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an excavated soil regenerating device.

[0002]

2. Description of the Related Art An excavated soil regenerating apparatus is an apparatus for improving soil when excavated soil is used as a foundation or ground. Generally, by adding a cement-based solidifying material,
It is performed by stirring and mixing.

Conventionally, when building or constructing a road on soft ground, the soft soil is removed and discarded, that is, used for land reclamation. It is being done. However, the soil to be discarded as much as possible due to the difficulty of disposing of the soil due to the decrease of landfills, and the fact that strong and excellent soil is decreasing due to environmental problems and transportation costs. It has been desired to reduce the amount of. Also, from the viewpoint of effective use of resources, there is a demand that usable resources should be used as much as possible.

[0004] It is therefore desirable to improve soft soils so that they can be used again as ground at that location or elsewhere needed. An excavated soil regenerating device is used in such a case.

[0005] The excavated soil regenerating apparatus simply puts the excavated soil in a container, adds a solidifying material to the excavated soil, mixes the soil (the soil quality is improved by the solidified material), and removes the soil.
Therefore, what is necessary is just a container and a stirrer. However, in this case, continuous work cannot be performed, and it is of a batch type and is inefficient. Therefore, recently, the majority is of the continuous type.

In this type of conventional apparatus, a stirring or mixing device is provided on a cylindrical or half-split main body, and excavated soil and solidified material are introduced from one end or an upper portion and mixed by the stirring and mixing device. It is discharged from the other. The stirring and mixing device used was a rotary blade having an axis in the same direction as the traveling direction of the soil. That is, by using a biaxial fan-like one with many coaxial blades, the soil is moved backward while mixing, or a screw conveyor with a continuous spiral vane is biaxial. It was done close to each other. This is because soil can be sent while mixing and stirring, so that continuous operation is possible.

[0007]

As described above, in the conventional continuous mixers, the rotating shafts of the rotating blades or the screws are all parallel to the feeding direction of the soil. This was the same as a screw conveyor and a fan, and was common sense. Of course, this alone can move backwards, but it is not possible to mix the solidifying material and soil, so place similar objects in close proximity and
Therefore, a stirring effect is provided. This method is the same for so-called kneaders (kneading machines) and the like.

In this method, there is no problem if the mixture has an appropriate particle size and an appropriate viscosity. However, the soil contains stones of various sizes, which may bite between the parallel two-axis wings. In order to increase mixing efficiency, the two-axis wings must be close (otherwise,
(It becomes like a simple screw conveyor and is not mixed), and the frequency of biting becomes higher.

In addition, this type of apparatus does not have the function of crushing stones or hard solidified soil, etc., but only cuts at the end of its wing at best. Therefore, if a stone or the like is used, the solidified material is hardly mixed into the solidified soil.

[0010] Therefore, there has been a long-awaited need in the art for a device that does not have the above-mentioned drawbacks and that can easily improve excavated soil at various sites.

[0011]

In view of the above circumstances, the inventors of the present invention have completed the method of the present invention as a result of earnest research, and the feature of the present invention is that the solidified material is mixed with the excavated soil. A device for improving soil, which is an inlet for introducing excavated soil and solidifying material (or good quality soil), a main body portion where the mixture is mixed and moved, and a main body portion which is provided at substantially right angles to the moving direction of the mixture. A plurality of stirring blades having a plurality of rotating blades attached to the rotating shaft, and a discharge port for discharging the mixture from the main body. The plurality of stirring rotors have different rotations. It is located on the shaft.

The excavated soil referred to here is a soil whose soil quality is to be improved. The excavated soil is not limited to excavated soil, but may be any soil such as dredged soil or soil used for other purposes. , Its origin does not matter.

[0013] The solidifying material may be one used for ordinary soil improvement, and need not be special. In short, anything that improves soil can be used. Of course, it depends on the properties to be improved. However, since the strength is usually improved, many cement-based materials are used.

The inlet is an opening for introducing excavated soil and solidified material into the main body, and may be of a type in which a mixture is introduced from one place or a type in which soil and solidified material are separately introduced. This is just an opening and need not be special. The position of the inlet is preferably on the upstream side of the stirring rotor described later, but may be on the stirring rotor.

The main body is a portion for mixing the solidified material and the soil, and also for transferring the mixture for continuous operation. It consists essentially of a simple container and a stirring rotor. The shape of the container itself may be cylindrical, rectangular, or the like.

[0016] The stirring rotor is an essential part of the present invention.
In this case, a rotary blade having a large number of widths is attached to a rotary shaft. The rotary blade here is not necessarily curved like a blade of an electric fan, but may be substantially planar. This is a completely different point from the conventional rotor.
This rotary blade has a certain thickness (about several millimeters to several centimeters)
It is a system that kicks out the soil rearward by its thickness. Therefore, the rotation axis of the rotary blade is provided at right angles to the soil transfer direction.

A large number of rotary blades are attached to the rotary shaft by changing their positions. This is because if they are all at the same position, they will be like a single plate and the mixing efficiency will be poor. The position itself may be completely random or may vary to some extent regularly.

The rotary blade may be a simple steel plate as long as it has a certain thickness, but in order to have strength, a hard tip may be separately attached to the tip. Also, the shape may be triangular, rectangular, or the like. It is also preferable to reinforce the base so as not to break or to make it thicker. The angle of attachment of the rotary blade may be in the radial direction of rotation or may have a slight angle with the radial direction.

At least two stirring rotors are required. If there are two or more, any number is theoretically possible. In the experiment of the inventor, in the case of two stirring rotors, the rotation direction may be either direction. That is, the stirring rotor may be rotated in the opposite direction or in the same rotation direction. However, the upstream agitating rotor was in the direction of sending the soil backward below the rotor, and the downstream rotor rotated in the opposite direction.

Contrary to the inlet, the outlet is simply an opening for discharging. The position is also downstream of the last stirring rotor,
It may be below the rotor.

In the present invention, a solidifying material is mixed in order to improve the soil. However, by mixing with a good quality soil instead of the solidifying material, a soil having predetermined properties (strength etc.) can be obtained. Good. Of course, it goes without saying that the excavated soil may be mixed with both good-quality soil and solidified material.

In the apparatus of the present invention, the rotation speed and the rotation direction may be appropriately adjusted depending on the particle size and viscosity of the soil, but in addition to this, the whole body may be tilted due to the problem of the soil discharge speed. For example, if the material is highly viscous and difficult to transfer, it is preferable to increase the transfer efficiency by lowering the discharge port side, and conversely, to increase the mixing efficiency by slightly increasing the discharge port side in the case of sand. The inclination can be easily achieved with a normal hydraulic jack or the like.

Further, the device of the present invention is most efficiently used in a place to be excavated. Therefore, it can be transported by a trailer or the like, but may be a self-propelled type, that is, provided on an upper part of a truck or the like.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
It is sectional drawing which shows the outline of. The main body 2 has a cylindrical shape, but has a raised portion 3 inside. In this example,
Three stirring rotors 4 are provided, and a plurality of rotary blades 5 (only one is shown here) are provided. In the example of this figure, the leftmost stirring rotor rotates counterclockwise. The other stirring rotors alternately rotate reversely. Inlet 6
Is provided above the left rotor, and the discharge port 7 is provided below the right rotor. In this example, the main body is designed so that the rotation volume and the main body volume of the stirring rotor are substantially the same.

In this example, when the mixture of soil and solidifying material is introduced from the inlet 6, the mixture is transferred downward and backward by the first stirring rotor. Then, when it comes to the vicinity of the next stirring rotor, it is stirred upward and a part thereof is mixed while returning to the front. At this time, the mixture does not completely follow the rotation of the stirring rotor, but a part of the mixture collides with a wall surface, and a part of the mixture falls and moves randomly. In this example, the main body is placed horizontally, but the outlet side is slightly raised to improve the mixing, and the outlet side is lowered to increase the transfer speed.

FIG. 2 shows a stirring rotor 1 of the regenerating apparatus of the present invention.
It is a conceptual perspective view showing an example. It can be seen that the rotary blades 5 are randomly attached to the rotary shaft 8. However, in this figure, the thickness of the rotary blade 5 is ignored, and the distance between the rotary blades is greatly exaggerated. As described above, the attachment positions of the rotary blades 5, that is, the mutual positional relationship, may not be such random but may be spiral or partially regular. Further, in this figure, one rotary blade exists on the same plane, but a plurality of rotary blades may be provided.

FIG. 3 is a schematic side view showing the entire reproducing apparatus incorporating the apparatus of the present invention. Hopper 9 for introducing excavated soil, conveyor 10 for transferring the excavated soil to the regenerating apparatus of the present invention, and solidified material tank 1 for storing and introducing solidified material
1. It comprises a regenerating device 12 of the present invention and a conveyor 13 for transferring regenerated soil discharged from the device of the present invention. The conveyor 10 controls the speed according to the reproduction speed. The hopper 9 may be provided with a screen to remove large stones and the like.

[0028]

The device of the present invention has the following advantages. In the device of the present invention, the rotor (or similar rotating body)
Since they do not rotate close to each other in the same direction, stones or the like do not bite, so that the rotor blades are not damaged, the device does not stop, and the main body is not clogged. Since the rotor impinges directly on soil, stones, hard solidified soil, etc., increasing the hardness of the rotor will greatly enhance the crushing effect. Adjustment of mixing efficiency and transfer amount is easy. Since the device is simple, it can be easily moved and assembled, and can be applied to any site.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of the device of the present invention.

FIG. 2 is a conceptual perspective view showing an example of a stirring rotor of the apparatus of the present invention.

FIG. 3 is a schematic side view showing an example of the entire device incorporating the device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 Excavated soil regeneration device of the present invention 2 Main body portion 3 Rising portion 4 Stirring rotor 5 Rotating blade 6 Inlet 7 Outlet 8 Rotating shaft 9 Hopper 10 Conveyor 11 Solidified material tank 12 Regeneration device 13 Conveyor

Claims (2)

[Claims] 1. A device for improving soil by mixing solidified material with excavated soil, an inlet for introducing the excavated soil and solidified material, a main body part where the mixture is mixed and moved, and the main body part is provided. A plurality of stirring rotors having a rotary shaft substantially perpendicular to the moving direction of the mixture, and a plurality of rotary blades attached to the rotary shaft, and a discharge port for discharging the mixture from the main body portion,
The excavated soil reclaiming device, wherein the plurality of stirring rotors are provided on different rotating shafts. 2. An apparatus for improving soil by mixing good quality soil with excavated soil, an inlet for introducing the excavated soil and good quality soil, a main body part where the mixture is mixed and moved, and a main body part, A plurality of stirring rotors having a rotary shaft substantially perpendicular to the moving direction of the mixture, and a plurality of rotary blades attached to the rotary shaft, and a discharge port for discharging the mixture from the main body portion,
The excavated soil reclaiming device, wherein the plurality of stirring rotors are provided on different rotating shafts.