JPS6111314Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a soft soil layer kneading device for improving the ground in a broad sense of soft soil containing sludge deposited in various rivers, ponds, coasts, ports, etc.

The present applicant previously proposed an effective and efficient kneading device for the above-mentioned soft soil, in which a stirring shaft, the upper end of which is connected to the drive means, is vertically mounted in a frame body equipped with a drive means in a freely rotatable state. We proposed Utility Model Application No. 105621/1986, in which a stirring blade is attached to the lower end of the stirring blade, and a torque canceling plate is provided that protrudes from the outer end of the stirring blade so as to be located on the outer periphery.

The present invention is a further improvement of such a device, in other words, it is not only possible to simply balance the torque, but also to actively correct the direction of movement of the stirring blade during kneading of soft soil layers, resulting in better turning accuracy, etc. It's all about what you do to get what you want.

An example of implementing the present invention will be described below based on the drawings.

In FIG. 1, reference numeral 1 denotes a stirring shaft constructed as a hollow shaft A, to which a rotational drive and an elevating action are applied by a device not shown. Reference numeral 2 denotes a stirring blade having a wedge-shaped cross section, which is attached radially to the tip of the stirring shaft, the inside of which is formed into a cave, and which communicates with the hollow shaft A through a guide hole 3, and whose wedge-shaped pointed end A jet hole 4 is bored in the outer wall surface opposite to the agitation shaft 1, and a conical head 5 is attached to the tip of the stirring shaft 1.

Bearing bodies 6a and 6b are provided below the stirring shaft, and are configured as split bearings for convenient attachment and detachment, and rods 7 are attached outward. 10
is a support shaft having a hollow interior, and is positioned parallel to and at a certain distance from the stirring shaft 1 via the rod 7.

Reference numeral 12 denotes a direction correction means, which is composed of a flat plate 13 having a constant area S, a rotating shaft 14, and a fluid pressure cylinder 15. The rotating shaft 14 is supported by the support shaft 10, and The moving shaft is connected to a fluid pressure cylinder 15 built into a hollow support shaft 10, and its rotation is restricted under arbitrary pressure.

The direction correcting means having the above configuration corrects the direction in two directions, the X-axis direction and the Y-axis direction, i.e., in the illustrated example, at an upper position of height h.
The phase difference is 90°.
As shown in the figure.

In the above embodiment, one stirring blade is provided, but the stirring blade may be provided in multiple stages. Furthermore, although the explanation has been given on a case in which the direction correction means 12, 12' are attached to one support shaft 10 at a certain distance apart, two or more sets may be connected, even if they are installed at the same position or adjacent to each other vertically. Alternatively, the support shaft may be provided separately at a position symmetrical to the stirring shaft 1 instead of using only one support shaft.

FIG. 2 is a cutaway plan view of another example, 1'
a, 1'b, 1'c, 1'd are stirring shafts, 2'a, 2'
b, 2'c, and 2'd indicate stirring blades attached to the tip of each stirring shaft, and these are connected to rods 7'a, 7'b, 7'c,
7'd at equal distances. Also 1
3'a, 13'b, 13'c, 13'd are direction correction plates arranged at intermediate positions; 14'a, 14'd;
4'b, 14'c, 14'd are the respective rotation axes, 1
Hydraulic cylinders 5'a, 15'b, 15'c, and 15'd limit the rotation of the rotating shaft under arbitrary pressure. In this example, four stirring shafts are arranged around one support shaft to perform efficient processing, and four direction correction means are arranged in the radial direction between the stirring blades. Ru.

The present invention is constructed as described above, and the correction plate as a direction correction means for moving in soft soil receives the repulsive force of the soft soil on its surface, and converts this repulsive force into energy for correcting the moving direction of the stirring blade. That's what I do. According to experiments, the area S of one plate is
When it is 1.44 m ² and tilted at 45 degrees, the lateral repulsive force from the soft soil will be approximately 2 tons, which is sufficient for direction correction energy.

Therefore, the hydraulic cylinder 15,
15' is operated appropriately and the plates 13, 13' are rotated to a required constant angle to increase or decrease the inclination angle of each correction plate. This allows the stirring blade to be guided in the directional direction.

This invention is more effective as the stirring shaft becomes longer.
In this case, the effect of the direction correction means is better as it is located closer to the tip of the stirring shaft.In addition, in the continuous hardening treatment of soft soil layers, there is an untreated portion at the junction between the preceding hardening treatment area and the subsequent hardening treatment area. The correction plate operation to prevent the occurrence of the above is simple and easy, and it is possible to completely prevent the uncured portion from intervening in the hardened portion. Furthermore, the present invention not only cancels out the torque generated in the stirring blade, but also prevents the stirring soil from rolling around to improve the stirring effect, and also corrects the direction of movement of the stirring blade. In addition, if the rotation axis of the direction correction plate is not set at the center of the plate, but eccentrically set such that ₁ < ₂ , the flow of soft soil will change when the stirring action descends and rises, and a synergistic effect of the stirring effect will be achieved. It has a significant effect on what is done.

In addition, the lateral pressing force generated by rotating the correction plate is different from when rotating at the center of the plate, and as the eccentricity increases, the pressing force increases. It is extremely effective in making it easier to move in one direction or another.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a case where there is only one stirring shaft, and FIG. 2 is a cutaway plan view of another example. DESCRIPTION OF SYMBOLS 1... Stirring shaft, 2... Stirring blade, 4... Spout hole, 5... Conical head, 7... Rod, 10... Support shaft, 12... Direction correction means, 13... Flat plate, 14
... Rotation axis, 15 ... Hydraulic cylinder.

Claims (1)

[Claims for Utility Model Registration] (1) The upper end of the stirring shaft is interlocked and connected to a frame body equipped with a driving means, and is hung vertically in a freely rotatable state, and near its lower end there are a stirring blade and a bearing. A rod is protruded from the outer periphery of the bearing body, and the support shaft is arranged parallel to the stirring shaft at a certain distance via the rod, and the stirring blade is moved outward from the support shaft. A soft soil is characterized in that a flat plate is attached to forcibly correct the orientation, and a hardening agent feeding means is provided at the stirring point of the stirring blade, and the soft soil is stirred and kneaded while supplying the hardening agent. Soil layer mixing equipment. (2) The soft soil layer kneading apparatus according to claim 1, which is a utility model registration, characterized in that at least two plates of the direction correction means are provided, one in the X-axis direction and the other in the Y-axis direction. (3) The soft soil layer kneading device according to claim 1, wherein the plate of the direction correction means is pivotally supported on a support shaft at a position eccentric from the center of the plate.