JPS631415B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for treating soil, particularly highly viscous soil.

Highly viscous waste soil usually sticks to handling equipment, making it extremely difficult to handle, and the handling equipment, such as a bucket, must be heated or vibrated. For this reason, there is a known technique for treating highly viscous soil by adding additives such as cement, quicklime, slaked lime, fly ash, etc. to stabilize the soil and make it easier to handle it later. .

However, in order to carry out such stable treatment, the additive and soil must be mixed at a certain ratio, and it is extremely difficult to supply soil that sticks to handling equipment at a certain ratio from, for example, a hopper. . Similarly, the mixing device or the stirring device used for mixing also causes the difficult problem of sticking during the process up to stabilization.

Therefore, an object of the present invention is to provide a method for treating highly viscous soil that can stably treat highly viscous soil using additives at a constant rate and that does not stick to handling equipment during the operation, and to implement the method. We provide equipment and services for you.

According to the present invention, highly viscous soil is supplied to a vibrating hopper, the soil is supplied from the hopper to an extrusion device, the soil is extruded from the extrusion device in fixed volume portions, and the extruded soil is cut in the longitudinal direction. During this time, additives are sprinkled on the cut soil and then mixed with soil.

By using the vibrating hopper in this way, the soil does not stick to the side walls of the hopper, and since it is pushed out of the cylinder, it does not stick to the inner wall of the cylinder. Then, in order to increase the surface area, the soil is cut perpendicular to the extrusion direction, sprinkled with additives, and the surface is stabilized to obtain cubic soil that is relatively difficult to adhere to. This cube-shaped soil is further shredded, but the cutting operation can be carried out relatively easily by surface stabilization treatment. Since the shredded soil and additives are then mixed, the surface of the relatively small cubes of soil can be completely stabilized, making further handling easier. Furthermore, since the volume of the cylinder is known, the amount of additive to be added after extrusion can be calculated in advance, and the mixing ratio will always be appropriate. Since at least the surface of such small cube-shaped soil has been stabilized, it is easy to handle.

Embodiments of the present invention will be described below with reference to the drawings. Figures 1A and 1B show a highly cohesive soil processing apparatus in which the present invention is implemented. The hopper 9 is for storing powder additives used for stabilizing treatment, and the hopper 9 is for storing treated soil. A pressure duct 2 is connected to the charge bin 1, and additives are introduced into the charge bin 1 from the pressure duct 2 by suitable pneumatic means (not shown). A rotary feeder 3 is provided at the lower end of the charge bin 1 for supplying additives in a fixed amount, and the amount of additives supplied is adjusted according to the gap (area S) between the rotary feeder 3 and the sliding plate 4. I'm starting to be able to do it. This rotary feeder 3
is shown in detail in Figures 2 and 3, and is suitable for granular additives such as quicklime or slaked lime. In the embodiment shown in FIG. 2, a screw adjusting member 5 is connected to the sliding plate 4, and the gate area S is adjusted by appropriately rotating a handle 6. Accordingly, the discharge amount V of the additive is expressed as follows: V=(rotation speed)×(feeder circumference: πD)×(gate area: S). Incidentally, a rotating blade 7 for preventing bridging is provided near the lower end of the charge bin 1. When powder such as cement or fly ash is used as an additive, a third feeder is used.
A vane feeder 8 as shown in the figure is preferred. The discharge amount of the additive at this time, V, is expressed as V = (number of revolutions) x (volume of one chamber: Q) Now, in Figure 1 A and B, the treated soil is put into the treated soil hopper 9. There is. In order to prevent soil loaded into the hopper 9 from adhering to the hopper side plates 10, 10, the side plates 10, 10 are moved by conventionally known vibration means 11, 11.
The hopper 9 is swung up and down and back and forth to forcibly create a gap between the soil and the hopper 9 to encourage the soil to fall under its own weight. A hydraulic cylinder 13 is provided below the hopper 9 which has a slider 12 serving as extrusion means, and the soil that has fallen from the hopper 9 under its own weight is moved toward the additive feeder 3 by the slider 12 which moves forward and backward by the hydraulic cylinder 13. It is pushed towards the target. This soil extrusion means 12 is shown in detail in FIG. 4, and the slider 12 is formed to have a slightly larger area than the lower end opening 14 of the hopper 9, and this slider 12 can move forward and backward. Rotatable wheel 15,1 for better
5 is supported and a rod 16 from a hydraulic cylinder 13 is connected. As a result, when the slider 12 retreats, the soil E falls on the front surface of the slider, and as the slider 12 moves forward, the soil block B is pushed out. In FIGS. 1A and 1B, a rotary cutter 18 having a plurality of radially fixed cutting blades 17 is supported so as to be rotationally driven by a motor 24 in front of the slider 12 in the forward and backward direction. Furthermore, a plurality of fixed blades 19 are installed at the tip of the rotary cutter 18 from which the soil block B is extruded.
The cutting blades 17 are arranged in a row so as to be alternately shifted from the position of the cutting blade 17 . Therefore, slider 1
The soil block B pushed out in step 2 is first
The soil is cut into a plurality of long pieces in rows 9, and then further cut by a rotary cutter 18, and a fixed amount of additive is sprinkled on the cube-shaped soil thus cut. Appropriate means of repression20
When a force exceeding a predetermined level is applied to the cutter gate G, which is supported by the support rod 21, it rotates to the position indicated by the dashed-dotted line G' in Fig. 1, for example, when a stone or the like is caught. I'm starting to do that. Therefore, by providing a conventionally known sensing means (not shown), it is possible to prevent damage to the cutting blade 17 if foreign matter such as stones is mixed into the soil block B.This mixed foreign matter can be discharged. To do this, wheels 23, 23 are provided so that the entire housing 22 housing the rotary cutter 18 can be moved backward.

An after mixer 25 is arranged below the rotary cutter 18 in a direction perpendicular thereto. This after mixer 25 has a plurality of cutting blades 26 radially arranged.
It is constructed by combining a plurality of cutters 27 having . This cutter 27 is driven to rotate according to data 28, and cuts the soil cut by the rotary cutter 18 into smaller cubes in the right angle direction to improve the mixing state of the additive and soil. be. The cutting blade 26 of this cutter 27 is preferably provided at an angle of inclination of about 30 degrees. It can also be used as a screw feeder to transport shredded soil to the left in the figure. This katsuta 27
The soil shredded and transported by the group is dropped onto a belt conveyor 29 and discharged outside the machine.

A hydraulic circuit diagram for driving the slider 12 of this soil treatment device is shown in FIG. Hydraulic cylinders 13, 13 for driving the slider 12 are connected to a variable hydraulic pump 32 via a solenoid valve 31 operated by a pressure switch 30. The variable hydraulic pump 32 is driven by a motor 33 and supplies oil from an oil tank 34 through an oil filter 35. Note that a relief valve 36 is provided in the circuit. This configuration allows the hydraulic cylinders 13, 13 to be operated freely.

In addition to installing an appropriate sensing means on the fixed blade 19 side, measures to prevent accidents caused by the contamination of foreign objects such as stones as described above can be taken by using a pressure switch 30 installed in the hydraulic cylinder circuit as shown in Fig. 5. It is also possible. In other words, this switch is a switch that opens and closes an electric circuit by sensing pressure changes in the hydraulic circuit, and if something hard is caught between the slider 12 and the fixed blade 19 row, the set pressure of the hydraulic cylinder 13 ( If the pressure rises above 160Kg/ ^cm2 ),
By operating the pressure switch 30 and switching the solenoid valve to the neutral state, the hydraulic cylinders 13, 13 are stopped, and no unreasonable load is applied to each part. It is also desirable to stop the operation of the entire device. To return, perform a reset on the control panel.

Further, the treated soil discharged from the after mixer 27 is loaded onto a truck 37 or the like by a belt conveyor 29. At this time, for work safety, the wire 38 is attached to the frame of the belt conveyor 29.
A limit switch 39 is provided at the end of the wire 38, and tension is applied to the wire 38 by a spring 40. As a result, if a person comes too close to the side of the belt conveyor 29 and touches the wire 38 during operation of the belt conveyor, the limit switch 39 is activated to stop the drive of the belt conveyor 29. To return, reset it on the control panel.

The method and apparatus of the present invention can achieve uniform mixing of soil and additives by mixing the additives while cutting the soil into pieces of a certain size, and then shredding the soil. In addition, it is easy to supply the additive in a fixed amount, and the amount of the additive can be freely adjusted.

Furthermore, the device of the present invention uses vibration means provided on both sides of the hopper to periodically create gaps between the soil and the hopper side plates, so that the soil in the hopper falls under its own weight, so that the slider 12 has a constant cross section. The packing density is also almost constant. A uniform mixing ratio with the additives metered by the feeder is thus achieved.

Furthermore, since this device can be made into either a stationary type or a hyperactive type, it can be adapted to suit the conditions of the work site. By appropriately adjusting the amount of additive supplied depending on the soil quality, a wide range of soil treatments can be achieved.

[Brief explanation of the drawing]

1A and 1B are a side view and a plan view showing the entire soil treatment device of the present invention, and FIGS. 2 and 3 are detailed views showing the quantitative feeding device. The figures are side views showing the vane feeder, Figure 4 is a detailed sectional view showing the driving part of the slider that pushes out the soil block, Figure 5 is a diagram of the hydraulic piping for driving the slider, and Figure 6 is the discharge of treated soil. FIG. 7 is a partial detailed view of the safety device of the belt conveyor surrounded by the square in FIG. 6. 1...Charge bin, 2...Pressure duct, 3...
...Rotary feeder, 4...Sliding plate, 5...Screw adjustment member, 9...Hopper, 12...Slider, 1
3...Hydraulic cylinder, 18...Rotary cutter,
27...After mixer, 29...Belt conveyor.

Claims (1)

[Claims] 1. Highly viscous soil is supplied to a vibrating hopper, the soil supplied to the hopper is supplied to an extrusion device, and the extrusion device extrudes the soil in fixed volumes, and
A highly viscous soil characterized by cutting the extruded soil in the longitudinal direction, sprinkling an additive on the cut soil in the meantime, and then further shredding the soil and mixing the additive and the shredded soil. processing method. 2. A slider driven by a hydraulic cylinder for pushing out highly viscous soil, a feeder for supplying a fixed amount of soil improvement agent, a rotary cutter for mixing the soil improvement agent while cutting the extruded soil, and this rotary cutter for mixing the soil improvement agent while cutting the extruded soil. A soil processing device characterized by being provided with an after mixer installed after the cutter to shred the soil and ensure uniform mixing.