JP2006077391A - Continuous soil conditioning, mixing, agitating, and feeding device for soil produced by construction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a continuous soil conditioning, mixing, agitating, and feeding device capable of efficiently improving soil produced by general constructions which has been difficult to conduct with a conventional pipeline-system mixing and agitating machine and also capable of reducing maintenance work. <P>SOLUTION: This device comprises a hopper 6 capable of regulating a soil supply amount by rotatingly controlling a soil supply amount control screw 8 at a soil inlet side and a mixing and agitating device having a separate driving device. By controlling their rotations separately, a supplied amount, a mixing and agitating time, and a discharged production amount can be controlled. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention belongs to the technical field of an apparatus for improving soil quality by adding an additive to earth and sand, and continuously mixing and stirring.

Conventionally, in the soil improvement treatment, there are many mixing and stirring devices (Japanese Patent Laid-Open No. 2001-79827, etc.) for the purpose of carrying out additives or recycling by mixing additives. Many of them are intended for sludge treatment with a high ratio, that is, fluidity, and when the sand and sand improvement is carried out using these devices for the treatment of general construction generated soil, which is the object of the present invention, the fluidity is poor. Because of the fact that the earth and sand supply screw and the stirring blade rotate on the same axis, voids and bias occur, so it is difficult to adjust the amount of soil, and the amount of additive determined by the weight ratio with the soil becomes ambiguous. Therefore, in order to ensure the effect, it must be added in excess, resulting in high cost.

Also, in the mixing and stirring part, the machine tends to stop or break due to the soil compaction phenomenon occurring in the gap between the stirring blade and the casing, or abnormal wear of the stirring blade. Not only is the improvement process difficult, but the cost is very high and it is quite difficult to actually use.
JP2004-60326

  Normally, in the soil improvement method, it is essential to control the amount of sediment supplied in order to mix the additive with the soil at a certain ratio. Many of them are aimed at improvement, and if you try to process using this device, the earth and sand supply screw and the stirring blades rotate coaxially, or some deviation occurs or the pipe becomes full It was difficult to adjust the soil volume due to clogging.

In addition, since the inner surface of the stirrer unit causes a soil compaction phenomenon due to the stirring blades, abnormal wear of the blades occurs, and the machine stops or breaks due to biting of pebbles etc. The treatment of the generated soil required considerable maintenance.

Describing the schematic configuration of the present invention, as shown in FIG. 1, the hopper 6 is capable of adjusting the amount of earth and sand, the additive supply port 11, and a mixing and stirring device having a separate driving device. In order to solve the conventional problems, it is a device that performs continuous soil improvement mixed stirring and transfer that enables adjustment of supply amount, mixing stirring time and discharge production amount by separately controlling the rotation of both drive devices. The present invention adopts the following means.

First, the earth and sand measuring method will be described. As shown in FIG. 1, the bottom part of the vertical earth and sand hopper whose upper part is the inlet is cylindrical, and the earth and sand supply device that penetrates in the vertical direction from the center and upper part of the earth and sand hopper. A method was adopted in which the earth and sand supply amount control screw 8 was provided on the rotary shaft 7 and the rotation was controlled so that the amount supplied to the mixing and stirring unit was controlled and an additive corresponding to the amount was added. This method is not suitable for sludge with high fluidity, but it is not so fluid in ordinary excavated soil, and it is dropped and stopped in the form of cutting out the sediment in the hopper by rotating this screw. In other words, it stays almost at the screw part.

It should be noted that the earth and sand supply control screw 8 has a normal spiral shape, but there is no problem. However, as shown in FIGS. 5 and 6, the blade configuration is arranged on the same circumference of the earth and sand supply device rotating shaft 7. By using two symmetrical spiral blades with the same spiral direction and partly overlapping, the cutting effect can be increased and the effective height of the blades can be reduced, so that the amount of sand input can be reduced as much as possible. It becomes.

Further, as shown in FIG. 6, by using a cushioning material such as wear-resistant rubber on the inner surface of the soil volume adjusting cylinder 9 of the soil hopper for controlling the soil supply amount, it is possible to prevent biting of pebbles and the like in this portion. Since the wear of the screw itself due to the soil compaction phenomenon is reduced, the frequency of maintenance can be reduced, and the replacement parts are also inexpensive, so the running cost can be reduced.

In addition, it is considered that the adhesion and cavitation of earth and sand can be more effectively reduced by swinging the hopper itself or the screw using an external vibrator.

Next, with regard to the mixing and stirring transfer device, the most intended aspect of the present invention is to separately control the rotation of the earth and sand supply amount control screw 8 in the hopper and the rotation of the mixing and stirring device, thereby supplying the amount of mixing and mixing. Since it is possible to adjust the stirring time and discharge production for the first time, this device itself may be used, but it can be rotated by providing a cushioning material on the inner circumference of the mixing stirrer body. Because the base material vibrates due to the load and the sand compaction phenomenon that occurs in the gap between the stirring blade 18 and the casing 12 is alleviated and the adhesion is reduced, the stirring blade is abnormally worn, or bites of pebbles, etc. The resulting drive stoppage or damage is likely to be reduced. Incidentally, the reason why the horizontal type is adopted for the mixing and stirring apparatus is that a vertical type is used so that the earth and sand throwing height is inevitably considerably increased, so that the horizontal type is also used for the transfer.

As shown in FIGS. 6 and 7, the cushion material used in the casing 12 also has a two-layer structure in which a wear resistant rubber 14 is used for the inner surface and a soft material such as foam rubber 13 is inserted in the middle portion. As a result, an even higher effect can be obtained.

  First of all, the supply and control of general construction generated soil with a low water content ratio can be smoothly supplied to the mixing and stirring device with a relatively simple structure. It is possible to reduce the cost by appropriately using the additive amount. In addition, because the earth and sand supply control screw 8 is arranged vertically, the part is housed in a cylinder and the earth and sand are supplied from the upper part of the rotation direction, so that the screw bites pebbles and the like. The possibility of doing is extremely low.

Next, the rotational speed of the earth and sand supply control screw 8 and the rotational speed of the mixing and stirring device can be independently controlled, so that the amount in the mixing and stirring section can be maintained appropriately and processed in an optimal mixing and stirring time. It is possible to prevent clogging by the tube.

Furthermore, as shown in FIG. 5, the configuration of the screw is two symmetrical spiral blades with the same winding direction of the spiral band on the same circumference of the earth and sand supply device rotating shaft 7 and partially overlapping, Increasing the cutting effect and lowering the effective height of the blades makes it possible to suppress the input height of earth and sand as much as possible.

Further, as shown in FIG. 6, by using a wear-resistant cushioning material on the inner circumference of the casing 12 of the mixing and stirring unit and the soil volume adjusting cylinder 9 below the earth and sand hopper, the base material vibrates due to rotation and load. Since the sand compaction phenomenon in the gap between the screw or stirring blade and the casing is alleviated, abnormal wear of the stirring blade can be suppressed, and the possibility of machine stoppage or damage caused by biting of pebbles and the like is reduced. In addition, the maintenance is considerably easier than before, and the soil quality can be improved efficiently and at a lower cost.

First, the earth and sand are put into the hopper 6 of the present invention, and the earth and sand supply amount control screw 8 is rotated, so that the earth and sand are cut downward by this screw and mixed with an additive corresponding to the amount, and then mixed and stirred. 12, improved soil is produced from the improved soil discharge port 17 while mixing and stirring for a required time with the stirring blade 18 disposed on the soil stirring shaft 16 that can be rotationally controlled by a separate driving device.

By using the device of the present invention for general construction generated soil, etc., which has been difficult to treat with conventional sludge treatment equipment, the soil content of the dam body soil such as a pond has deteriorated due to deterioration of water permeability. It is possible to improve the water permeability and improve the water permeability and recycle the environment.

FIG. 5 is a cross-sectional view taken along the line CC in FIG. 4 and shows an internal structure that is the basis of the present invention. The AA cross section of the mixing and stirring part in FIG. 1 is shown. An outline of the external configuration of FIG. 1 is shown. The side surface outline | summary of FIG. 3 is shown. The earth and sand supply amount control screw in FIG. 1 shows the internal structure of the earth and sand hopper which is two spiral blades. The internal structure which provided the cushioning material etc. on the inner-circumferential surface of a soil volume adjustment cylinder and a mixing stirring part is shown. The BB cross section of the mixing stirring part in FIG. 6 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sediment input port 2 Sediment supply apparatus rotating shaft support 3 Sediment supply apparatus bearing 4 Power transmission chain 5 Sediment supply drive device 6 Sediment supply amount adjustment hopper 7 Sediment supply apparatus rotation shaft 8 Sediment supply amount control screw (sediment cutting screw)
9 Soil volume adjusting cylinder 10 Sediment hopper connecting part 11 Additive supply port 12 Casing (stirring part body)
13 Shock absorber (foam rubber)
14 Cushion material (Abrasion resistant rubber)
DESCRIPTION OF SYMBOLS 15 Agitator bearing 16 Sediment agitation shaft 17 Improved soil discharge port 18 Stirring blade 19 Sediment agitation drive device

Claims (5)

Sediment supply amount that is driven by providing a sediment supply amount control screw 8 on a rotary shaft 7 of a sediment supply device that has a vertical cylindrical shape at the bottom and penetrates in the vertical direction from the center upper part at the location. The adjusting hopper 6 is provided with an additive supply port 10 in the lower part thereof, and a mixing and agitation transfer device in which a stirring blade 18 is arranged on the earth and sand agitation shaft 16 rotated by a separate driving device in the lower part thereof in combination in the cross flow direction. A continuous soil-improvement mixing and stirring transfer device constituted by The earth and sand supply amount control screw 8 is two symmetrical spiral blades having the same winding direction in the spiral band on the same circumference of the earth and sand supply device rotating shaft 7 and partially overlapping each other. Item 2. The earth and sand supply control screw according to Item 1. The earth and sand supply amount adjusting hopper according to claim 1, wherein a cushioning material such as wear-resistant rubber is provided on the inner circumferential upper surface of the earth volume adjusting cylinder (9). 2. The mixing agitation transfer device according to claim 1, wherein a cushioning material such as wear-resistant rubber is provided on the inner circumferential upper surface of the casing. The cushion material is made of a two-layer structure in which an inner circumferential upper surface is wear-resistant rubber 14 and an impact absorbing material 13 such as foam rubber is disposed between the cushion material and the casing. The cushion material of Claim 3 and Claim 4.