JP2002004328A - Soil-sand improvement material feeder for soil-sand improvement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soil-sand improvement material feeder in which a soil- sand improvement material can be discharged smoothly without generating a bridge phenomenon while a shutter device is made unnecessary. SOLUTION: An eccentric weight is annexed at one end section of an agitating blade for a screw conveyor for agitation installed near the bottom section of the soil-sand improvement material feeder while an electromagnetic solenoid vibrating feeder is mounted to the discharge opening of the bottom section of the soil-sand improvement material feeder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to excavated earth and sand when excavating a road surface or the like for burying or repairing pipes such as water and sewage and gas, and cables for electricity and telephones, and excavating during tunnel construction. Earth and sand reforming excavated by these excavation works by adding a soil modifying material such as lime or cement to the excavated soil and agitating it to reform the excavated earth and produce an improved soil for reuse as backfill material. The present invention relates to an apparatus for supplying a soil and sand reforming material of a quality apparatus.

[0002]

2. Description of the Related Art Conventionally referred to as construction residual soil, pipes for water and sewage, gas, etc., cables for electricity, telephones, etc. are buried or excavated when excavating a road surface or the like for repair. Excavated earth and sand are generated in large quantities as construction residual soil. Conventionally, such construction remains have been transported and buried in a mountainous area near the work site or a relatively close seaside.

However, in recent years, it has become difficult to secure a place suitable for land reclamation, and the cost of transporting construction remains to a distant place requires a large amount of cost.
Also, even if it can be secured in place, there are environmental regulations on landfill, and it is difficult to simply transport and fill the surplus soil to mountainous areas or seaside as in the past.

[0004] It is only necessary to be able to reclaim construction surplus soil on-site at an excavation work site. However, once excavated construction surplus soil contains gravel, sludge, asphalt fragments, rock fragments, concrete fragments and the like. In addition, when used as a backfill material, the grain size of the soil is not uniform and the cohesive force between the soil grains is also deteriorated, and this is reused as landfill for excavation trenches in the subgrade. However, it is difficult to obtain the necessary bearing capacity as the ground.

[0005] For this reason, excavated earth and sand generated at the work site cannot be used as it is for land reclamation, and high quality earth and sand necessary for land reclamation is newly purchased and carried in and used as landfill earth and sand.

[0006] However, if the excavated earth and sand that has been excavated once and is generated as construction surplus soil is simply discarded, it is merely a waste. However, by performing the reforming treatment, it is again used as material (backfill soil). It can be used effectively. Various soil improvement devices for modifying excavated soil by adding a soil modifying material such as lime or cement to the excavated soil are known as such devices.

FIGS. 6 and 7 show a conventional soil improvement device.
As shown in FIG. 1, the apparatus comprises a sieving device 1, a soil and sand modifier supply device 4, and a mixing and stirring device 3. Further, a belt conveyor 2 for transporting and supplying the excavated earth and sand under the sieve, which has been reduced to a certain size or less by the sieve device 1, to the mixing and stirring device 3 is disposed. An earth and sand modifier feeder 4 is provided for feeding and feeding a soil and sand modifier such as cement. And the mixing and stirring device 3
In the lower part, the excavated soil and the soil modification material are mixed and agitated, and the modified soil discharged again as a material is discharged onto the belt conveyor 5, transported and deposited in the stock yard 6, and reformed and regenerated. Used as earth and sand for landfill.

[0008] The earth and sand reforming material supply device 4 for feeding and feeding the earth and sand reforming material to the mixing and stirring device 3 of the conventional earth and sand reforming device.
Is a chute 10 for discharging a soil and / or sediment modifying material to a peripheral and / or sediment modifying material discharge portion 8 of the peripheral wall 7, and a sediment / reforming material to which the sediment modifying material is supplied to an upper part of the peripheral wall 7. A supply port 9 is provided.

[0009] A chute 10 provided in the earth and sand reforming material discharge unit 8 of the earth and sand reforming material supply device 4 is provided with a screw conveyor 12 for discharging the earth and sand reforming material. A screw conveyor 11 for stirring the earth and sand reformer supplied to the earth and sand reformer feeder 4 is provided near the earth and sand reformer discharge section 8 of FIG.
The two screw conveyors 12 and the stirring screw conveyor 11 are rotationally driven by motors 14 and 13 for rotational driving.

The two screw conveyors 1
2 and a screw conveyor 11 for stirring, a shutter device 15 is provided.
With the opening and closing of the above, the earth and sand reforming material can be sent to the mixing and stirring device 3 from the chute 10 provided in the earth and sand reforming material discharge section 8 or stopped.

[0011]

However, when the conventional soil modifying material supply device 4 is supplied with the soil modifying material from the upper soil modifying material supply port 9, the earth and sand modifying material Since the modified material discharge portion 8 is narrowed toward the chute 10 and has a shape, even if the screw conveyor 12 for discharging is operated, a so-called bridge phenomenon occurs above the screw conveyor 12 so that the hollow portion is formed above the screw conveyor 12. Comes up, shoot 10
Can not be supplied to the mixing and stirring device 3 from the soil. Then, the amount of the soil modification material required for the modification is not added to the excavated soil to be modified, and the reusable soil cannot exhibit its reusable performance.

Further, the chute 1 of the soil and sand reforming material supply device 4
Although the feeding of the soil and soil modifying material from 0 is performed by the screw conveyor 12 for discharging, and the supply and the stop are performed by the shutter device 15 provided above the screw conveyor 12 for discharging, the screw conveyor 12 for discharging is used.
Although the amount of the soil and soil reforming material supplied to the screw conveyor 12 can be adjusted by the number of rotations, when the amount of the soil and soil modifying material supplied through the shutter device 15 changes, the amount of the soil and sand delivered by the screw conveyor 12 also changes. In order to adjust the supply amount of the soil and sand modifier to the mixing and stirring device 3, it is necessary to adjust both the opening and closing amount of the shutter device 15 and the rotation speed of the screw conveyor 12. It was practically difficult to adjust.

The present invention has been made in view of the above-mentioned problem, and an electromagnetic solenoid vibration feeder is attached to an outlet of a chute at a bottom of a soil and sand reforming material supply device.
The shutter device provided in the conventional soil and soil reforming material supply device is unnecessary, and the electromagnetic solenoid vibration feeder can easily finely adjust the discharge amount of the soil and soil reforming material by adjusting the electromagnetic cycle, thereby improving the quality of the soil and soil reforming material. It is an object of the present invention to provide a soil and sand reforming material supply device capable of finely adjusting the amount of a soil and sand modifying material to be added in accordance with the state of the excavated earth and sand and the use of the improved soil.

Further, in order to mix and agitate the excavated earth and sand and the earth and sand modifying material inside the earth and sand modifying material supply device, a stirring screw conveyor having an agitating blade provided with an eccentric weight at one end is provided. Provided is a soil and sand reforming material supply device that applies vibration to a rotating shaft having blades to stimulate a soil and sand reforming material so that the sand and sand reforming material can be smoothly discharged without interruption due to a bridge phenomenon. The purpose is to:

[0015]

In order to achieve the above object, an invention according to claim 1 of the present invention is directed to a soil and soil reforming material supply apparatus for a soil and sand reforming apparatus, wherein An electromagnetic solenoid vibration feeder is provided at the bottom outlet as a modifier supply amount adjusting means, and the amount of electric power applied to the electromagnetic solenoid of the electromagnetic solenoid vibration feeder is adjusted to supply power, whereby the soil and soil reforming from the outlet is controlled. The material supply amount can be adjusted.

In order to achieve the above object, the invention according to a second aspect of the present invention is directed to an apparatus for supplying a soil and soil reforming material, in which a stirring blade is provided for stirring the injected soil and sand reforming material. The rotating shaft provided is provided so as to be driven to rotate by a motor, and an eccentric weight is attached to one end of the stirring blade.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a soil and sand reforming material supply apparatus of the earth and sand reforming apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic vertical cross-sectional view of a soil and soil reforming material supply device of the present invention, FIG. 2 is an enlarged cross-sectional view of a chute outlet of the soil and sand reforming material supply device of the present invention, and FIGS. It is an operation | movement state diagram of the electromagnetic solenoid vibration feeder provided in 2 chute discharge ports.

To explain the whole of the soil and soil reforming apparatus of the present invention, the soil and sand reforming apparatus of the present invention is similar to the conventional soil and sand reforming apparatus described above with reference to FIG. It comprises a device 4 and a mixing and stirring device 3. Further, the excavated earth and sand under the sieve crushed by the crushing device of the sieving device 1 and reduced to a certain size or less by the sieving device from the lower portion of the sieving device 1 to the upper portion of the mixing and stirring device 3 to the mixing and stirring device 3. A belt conveyor 2 for carrying and feeding is arranged, and a modified soil discharged as a material, in which the excavated earth and sand and the soil modifying material are mixed and agitated, is again provided at a lower portion of the mixing and stirring device 3. The wastewater is discharged onto the stock yard 5, transported and deposited in the stock yard 6, and reused as a modified and reclaimed landfill for excavation trenches such as roadbeds.

Next, a description will be given of a soil and sand reforming material supply device of the earth and sand reforming device of the present invention with reference to FIGS. Each of the openings is formed in the shape of a rectangular cylinder or a cylinder whose lower part is squeezed into a pyramid shape, and the upper opening of the peripheral wall portion 7 forming the rectangular cylindrical or cylindrical cylindrical body is supplied with a soil and sand modifying material. And a lower opening forms an earth and sand reforming material discharge section 8 from which the earth and sand reforming material is discharged. And
A rotary shaft 16 having a curved arm-shaped agitating blade spanned in the width direction of the cylindrical peripheral wall portion 7 is provided at an upper portion of the soil and sand reforming material discharge portion 8. Is
An eccentric weight 18 is attached, and the rotating shaft 16 is
Is driven to rotate.

On the other hand, an electromagnetic solenoid vibration feeder section 20 is attached to the earth and sand reforming material discharge section 8 of the earth and sand reforming material supply device 4 so as to be in close contact with the opening edges 81 and 82 of the discharge section 8. Reference numeral 19 denotes an electromagnetic solenoid vibration feeder unit 2.
0 is an electromagnetic solenoid that operates.

The electromagnetic solenoid vibration feeder 20 has a core 22 covered with a covering rubber 21. The core 22 of the electromagnetic solenoid vibration feeder 20 is attached to the electromagnetic solenoid 19 via an arm member 23. Have been. When the power to the electromagnetic solenoid unit 19 is turned off, the electromagnetic solenoid vibration feeder unit 20 opens the edge portions 81 and 82 of the earth and sand reforming material discharge unit 8 of the earth and sand reforming material supply device 4.
And closes the discharge port of the discharge section 8.

Next, when the power is turned on, the electromagnetic solenoid section 19 is operated, and the electromagnetic solenoid vibration feeder section 20 is operated.
Is lowered by the gap a from the opening edge 82 of the soil and sand reforming material supply device 4 by the arm member 23 of the electromagnetic solenoid unit 19 (see FIG. 3). Then, the electromagnetic solenoid vibration feeder unit 20 is pushed downward by the gap b while being lowered downward by the gap a, and at this time, the sediment modifying material placed on the electromagnetic solenoid vibration feeder unit 20 is removed by the gap. (a) (see FIG. 4). Further, the electromagnetic solenoid vibration feeder unit 20 is provided with a gap a
5 and is brought into close contact with the opening edge portion 82 of the soil and sand reforming material supply device 4 (see the description of FIG. 5), closes the discharge port of the earth and sand reforming material supply device 4, and then the electromagnetic solenoid vibration feeder. The part 20 is pulled backward by the gap b and returns to the state of FIG.

The earth and sand modifier is discharged from the gap a while repeating such a cycle at a high speed. The vibration cycle of the electromagnetic solenoid vibration feeder unit 20 can be obtained by adjusting the frequency of the power supply to the electromagnetic solenoid unit 19.

Next, the function of the soil modifier feeder 4 of the present invention will be described. The rotary shaft 16 provided with the stirring blade is rotated by the motor 17, and the rotation of the stirring blade of the rotary shaft 16 changes the soil and sand. The soil and sand modifying material contained in the material supply device 4 is stirred, but the eccentric weight 18 is attached to one end of the stirring blade of the rotating shaft 16 having the stirring blade. The provided rotary shaft 16 rotates while causing eccentric vibration with a large amplitude width as compared with the case where the eccentric weight 18 is not attached, and rotates the sediment-modified material accommodated in the soil-modified material supply device 4. With stirring, the soil and soil modifier can be sent downward without causing a bridging phenomenon inside the soil and soil modifier feeder 4.

Further, the eccentric vibration of the rotary shaft 16 having the stirring blade is transmitted to the peripheral wall 7 of the soil and sand reforming material supply device 4,
Vibration is added to the whole of the soil and soil reforming material supply device 4, so that the soil and sand reforming material supply device 4 is shaken, and the soil and soil reforming material inside the soil and sand reforming material supply device 4 is further fed downward. More promoted.

The sediment-modifying material sent to the discharge port of the sediment-modifying material discharge section 8 of the soil-modifying material supply device 4 is mixed by the electromagnetic solenoid vibration feeder section 20 closing the discharge port. Although not supplied to the stirring device 3, the electromagnetic solenoid vibration feeder unit 20 closing the discharge port is not provided.
By supplying power to the electromagnetic solenoid unit 19, the electromagnetic solenoid vibration feeder unit 20 operates, and according to the vibration cycle of the electromagnetic solenoid vibration feeder unit 20 downward, forward, upward, and backward, It is supplied to the mixing and stirring device 3 from the gap a between the electromagnetic solenoid vibration feeder unit 20 and the opening edge portion 82 of the soil and sand reforming material supply device 4, and is mixed with the excavated sediment carried in from the sieve device 1 by the mixing and stirring device 3. Is done.

The supply amount of the soil and sand modifier from the soil and sand modifier feeder 4 depends on the downward gap a and the forward gap b, and this cycle is performed by the electromagnetic solenoid unit 1.
9 is determined by the frequency of the power source, and by adjusting the frequency of the power source, the amount of the sediment modifying material to be added can be finely adjusted according to the condition of the excavated soil to be reformed and the use of the improved soil. can do. Further, since the electromagnetic solenoid vibration feeder is attached to the discharge port at the bottom of the soil and sand reforming material supply device, the shutter device provided in the conventional soil and sand reforming material supply device becomes unnecessary.

[0028]

As described above, the soil and soil modifier feeder of the present invention has an electromagnetic solenoid vibration feeder attached to the discharge port of the chute at the bottom of the soil and soil modifier feeder, and this electromagnetic solenoid vibration feeder is electromagnetically driven. By adjusting the cycle, it is possible to easily fine-tune the discharge amount of soil and soil modifier,
This makes it possible to finely adjust the amount of the added soil modifying material according to the condition of the excavated soil to be modified and the use of the improved soil, and the shutter provided in the conventional soil modifying material supply device is provided. The effect that the device can be eliminated can be obtained.

Further, since a rotary shaft having a stirring blade provided with an eccentric weight at one end is provided inside the soil and soil reforming material supply device, vibration is applied to the rotary shaft to thereby supply the soil and soil reforming material. Vibration is given to the device itself to agitate the sediment modifying material contained in the soil modifying material supply device, and the sediment modifying material does not cause a bridging phenomenon in the soil modification material supplying device 4. This has the effect of being able to be sent downward.

[Brief description of the drawings]

FIG. 1 is a schematic vertical cross-sectional view of a soil and sand modifier feeder of the present invention;

FIG. 2 is an enlarged cross-sectional view of a chute outlet of the soil and sand reforming material supply device of the present invention;

FIG.

FIG.

5 is an operation state diagram of an electromagnetic solenoid vibration feeder provided at a chute discharge port of FIG. 2;

FIG. 6 is a side view of a soil and sand reforming apparatus,

FIG. 7 is a schematic longitudinal sectional view of a conventional earth and sand modifying material supply device.

[Explanation of symbols]

1 sieve device, 2 belt conveyor, 3 mixing and stirring device, 4 earth and sand reforming material supply device, 5 belt conveyor,
6 Stock yard, 7 Perimeter wall, 8 Sediment reforming material discharge part, 81 Opening edge, 82 Opening edge, 9 Sediment modifying material supply port, 10 Chute, 11 Stirring screw conveyor, 12 Screw conveyor, 13
Motor, 14 motor, 15 shutter device, 1
6 rotating shaft with stirring blades, 17 motor, 18
Eccentric weight, 19 electromagnetic solenoid part, 20 electromagnetic solenoid vibration feeder part, 21 covering rubber, 22 core part of vibration feeder part, 23 arm member.

Continuation of the front page (72) Inventor Kazumasa Sawa 2-6-2 Otemachi, Chiyoda-ku, Tokyo Inside Nikko Construction Machinery Co., Ltd. (72) Inventor Tsutomu Nagasaki 1-6-1, Oto, Okayama-shi, Okayama Prefecture No. 602

Claims (2)

[Claims] 1. An earth and sand reforming material supply device of an earth and sand reforming device, wherein an electromagnetic solenoid vibration feeder is provided as a reforming material supply amount adjusting means at a discharge port at a bottom portion of the earth and sand reforming material supply device. A supply amount of the soil modifying material from the discharge port can be adjusted by adjusting a power supply amount applied to the electromagnetic solenoid of the feeder to supply the electric power, and the earth and sand modifying material supply of the soil and sand reforming device is characterized in that apparatus. 2. A stirring shaft provided with a stirring blade provided in the interior of the earth and sand modifying material supply device so as to be rotatably driven by a motor in order to stir the introduced earth and sand modifying material. The earth and sand reforming material supply device of the earth and sand reforming apparatus according to claim 1, wherein an eccentric weight is attached to one end of the earth and sand reforming apparatus.