JPS6055105A - Mixer stirrer for use in road improvement - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for improving the roadbed by adding an improving agent such as a soil solidifying agent to a soft roadbed under railway tracks, and in particular, an apparatus for stirring the roadbed while adding the improving agent. This invention relates to a mixing and stirring device for roadbed improvement.

In general, this type of mixing and agitating device includes one in which a stirring blade that can be opened and closed is attached to a digging rod that rotates and penetrates into the roadbed, and a solidifying agent is spouted from the digging rod.
There is also a method in which the improving agent is added into the roadbed from a stirring blade.

However, in the conventional opening/closing blade type mixing and agitating device described above, the improver is ejected from the digging rod, which has the disadvantage that it is difficult to uniformly add the improver to the entire stirring area.

On the other hand, those that add the improver by spraying it from the stirring blade are
Although it has the advantage of being able to uniformly add the improver into the roadbed as described in Section 2, the stirring blades are fixed to the digging rod and cannot be opened or closed, so they cannot be used in openings under railway tracks or in narrow spaces. It is almost impossible to penetrate into the roadbed, and it is difficult for the digging rod to penetrate into the roadbed.

In addition, in conventional stirring blades that spray and add improving agents, multiple jetting ports are arranged along the entire length of the blade, so they stagnate around the excavation rond where the circumferential speed is low, and when the circumferential speed is high, It tends to be diluted around the outer periphery of the stirring blade, which has a wide stirring area, and the structural strength is weak and complicated, which can cause the blade to deform or soil to adhere to f = 1, which can easily change the flow path of the improver and add it uniformly. It had some serious drawbacks.

Furthermore, with conventional open/close type stirring blades, when the blades are closed, the tips of the blades are retracted into the inside of the digging rod, so it is easier to dig by devising the shape of the lower end of the digging rod or attaching a bit. However, the structure of the lower end of the digging rod is complicated, and there is a risk of problems such as wear and breakage.

The present invention has been accomplished in order to overcome the drawbacks of the conventional mixing and stirring devices described above. The purpose of the present invention is to provide a mixing and agitating device for roadbed improvement that can easily penetrate into the roadbed and uniformly add the improver. By adding the improver from the beginning, the diffusion effect of the improver can be enhanced and it can be added uniformly, and there is less blowing around the digging rod, and the structure of the improver outlet formed on the stirring blade can be simplified. The purpose of the present invention is to provide a mixing and stirring device for roadbed improvement that has less deformation and is easy to clean and replace.Further, the third object is to simplify the shape of the lower end of the digging rod, and to use the stirring blade as a means for assisting the penetration of the digging rod. To provide a mixing and stirring device for roadbed improvement that can be used as a roadbed improvement device.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, 1 is a digging rod,
From the main body of the roadbed improvement equipment (not shown) that runs on the track.”
It is suspended so that it can move downward or upward in the two lower axial directions, and can penetrate into the roadbed while rotating, and a longitudinal slot 2 is formed in the center of its lower part. A stirring blade 3 is rotatably attached to the slotted portion 2 via a support shaft 4 . The inner end of the stirring blade 3 is connected to the lower end of the link 6 via a pin 5, and the link 6
The upper end side is sequentially connected to the lower end of the operating rod 8 via a pin 7.

Therefore, when the operating rod 8 is moved downward as shown by the solid line arrow, the stirring blade 3 opens outward as shown by the solid line arrow, and conversely, when the operating rod 8 is moved upward as shown by the broken line arrow, the stirring blade 3 opens as shown in the solid line arrow. It closes downward as shown by the dashed arrow. At least one side of the stirring blade 3 near the pivot base 11 is always in sliding contact with the inner side of the slot 2 of the digging rod 1 (hereinafter referred to as sliding surface). Further, when the stirring blade 3 is closed as shown by the chain line in FIG. 1 or as shown in FIG. It is designed to allow for smooth penetration by disturbing the lead.

In addition, 9 is a stopper when the stirring blade 3 is opened,
10 is a stopper when closed.

As is clear from Fig. 2, there are two
A channel 11.12 is formed for introducing a type of improver, the upper end of which is connected to a feed plant for the improver (not shown).
It is connected to the pipes 13, 1.4 which are connected to the pipes 13 and 1.4, and the lower end thereof is connected to the support shaft 4 to which the stirring blade 3 is pivotally connected.
It is connected to the spout 15 which is opened at the lower sliding contact surface.

On the other hand, the sliding surface on the side of the stirring blade 3 is provided with the pivot shaft 4.
Injection 1 shaped as an arc-shaped long hole centered on
16 is open and communicates with the spout 15 during the opening/closing operation of the stirring blade 3.
7 is connected to an addition slit 18 formed on the rear side (with respect to the rotational direction) of the outer part of the stirring blade 3 (
(See Figures 3 and 4).

Note that a balance blade 19 as shown by a phantom line may be provided on the digging rod 1 on the opposite side of the stirring blade 3.

Next, the operation of the above embodiment device will be explained.

First, with the stirring blades 3 closed, the digging rod 1 is penetrated into the ballast between the tracks and between the sleepers while rotating. At this time, the ballast is disturbed by the stirring blade 3 extending downward from the tip of the digging rod 1.
It facilitates the penetration of

When the lower end of the digging rod 1 passes through the ballast layer and reaches a predetermined roadbed layer, the operating rod 8 is lowered in the direction of the solid line arrow, and the stirring blade 3 is gradually opened via the link 6 as shown by the solid line arrow to stir. While expanding the area, reach the bottom of the roadbed to be improved.

On the other hand, two types of improving agents such as caking agents, which are pumped at relatively low pressure from the supply plant as appropriate, are supplied to pipes 13 and 13, respectively.
14, passes through passages 11 and 12 and reaches spout 15,
Here the two modifiers are mixed. As is clear from FIG. 4, the spout 15 has an inlet 1 formed in the stirring blade 3.
6 always faces, the improving agent that has reached the spout 15 directly enters the inlet 6, passes through the introduction hole 17, and is added into the roadbed through the addition slit 18.

The improvement agent may be added when the stirring blade 3 is open, but if the inlet 1G is formed into an arcuate elongated hole as in this example, the stirring blade 3 may be closed. Sometimes, the spout 15 and the inlet 6 are in communication with each other, so that the improving agent can be added.

When the improving agent is added from the front part of the stirring blade 3 as described above, the improving agent is dispersed from the position where the circumferential speed of the circular motion is high due to the stirring to a wide part of the addition area. After passing through the stirring blade 3, it is compressed by the return soil action and pushed into the gap around the digging rod 1, and as shown in FIG. On the other hand, since a small amount is added to a narrow part of the addition area of the internal force part of the stirring blade 3 near the digging rod 1, it is uniformly distributed throughout.

Figure 6 (A-C) shows the above two types of improving agents added to the stirring blade 2.
This shows an example in which the liquids are fed into the stirring blade 20 independently and mixed together inside the stirring blade 20. Injectors 21 and 22 are separately formed on the sliding surfaces on both sides of the base of the stirring blade 20. , introduction holes 23 and 24 extend from the respective injection ports 21 and 22 toward the addition shaft 25 at the tip of the stirring blade 20, and are arranged to join there.

FIG. 7 shows another embodiment in which an arc-shaped inlet 27 is opened along the outer circumferential surface of the base rotating portion of the stirring blade 26 to receive the improver supplied from the outlet 28. .

In the above embodiment, one stirring blade 3, 22, 26 is used for mixing and stirring, but it is also possible to use a plurality of stirring blades 3, 22, and 26. However, the present invention is not limited to this, and the spout 015°28 etc. opened on the digging rod 1 side may be formed into an arcuate elongated hole, and both the inlet and the spout may be formed into an elongated hole. Alternatively, the communication may be made only when the stirring blade is opened. However, when adding the improver, mix and stir.
Second, it also serves as a lubricant, so it is preferable to use it immediately before or during opening.

In addition, there is a slit H for addition made on the outer end of the stirring blade.
, 8, and 25 are not limited to those shown in the drawings, and can be opened toward the outer end surface or lower surface of the stirring blade, for example.

Furthermore, in the above example, two types of improving agents are introduced and mixed and added, but the present invention is not limited to this, and it may be configured to mix one type or three or more types. Good too.

Next, the effects of the present invention will be listed.

(1) Since a communication means for the improving agent is provided on the sliding surface of the stirring blade and the digging rod, it is not only possible to smoothly transfer the improving agent from the digging rod to the stirring blade, but also it is easy to penetrate into the roadbed. It can be added uniformly over a wide range.

(2) The communication means for transferring the improving agent from the digging rod to the stirring blade is configured by facing the spout and injection port, so the structure is simple and the transfer can be ensured, and the blade can be opened and closed. is smooth and less prone to clogging.

(3) Since either the spout or the inlet is formed into a long arc, the improving agent can be added regardless of whether the stirring blade is opened or closed.

(4) The improver is added from the external force part of the stirring blade, and the stirring speed is high and it is dispersed over a wide range of addition area, and it is also diffused inward by the return upper pressure after passing through the stirring blade. It is possible to provide a stirring blade that not only can disperse and mix the improving agent almost uniformly over the entire stirring area, but also has a simple structure and is easy to clean and replace. It comes off.

(5) Since the addition slit is opened on the rear side in the rotational direction of the tip of the stirring blade, it is possible to actively draw out the improver and obtain a clogging-free addition means.

(6) When the stirring blade is closed, its tip extends downward from the lower end of the digging rod, so it can easily penetrate into the roadbed without using special measures such as a bit at the tip of the digging rod. can be made

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the stirring device of the present invention, FIG. 2 is a partially cutaway front view, and FIG. 3 is an explanatory diagram showing the relationship between the elongated hole and the injection port during rotation of the stirring blade. FIG. 4 is a diagram showing the movement of the improving agent, FIG. 5 is a plan view showing the state of stirring of the improving agent, and FIGS. 6 and 7 are views each showing another embodiment of the stirring blade. DESCRIPTION OF SYMBOLS 1... Digging rod, 2... Slit part, 3... Stirring blade, 4... Support shaft, 5... Pin, 6... Link, 7
... Bottle, 8... Operating rod, 9 + 10... Stopper, 11.12... Passage, 13.14... Pipe, 15... Outlet, 16... Inlet, 17...
Guide hole, 18... Addition slit, 19... Balance blade, 20... Stirring blade, 21. , 22... Inlet, 23.24... Guide hole, 25... Addition slit, 26... Stirring blade, 27... Injection 1'', 28...
・Pour spout. Patent applicant: Tokyu Construction Co., Ltd. 16 (A) -2 ( ) Figure 8 □---4- m: [ / Figure] ≧5 (C) U

Claims (7)

[Claims] (1) Several stirring blades that can be opened and closed are provided at the bottom of the digging rod that rotates and penetrates into the roadbed, and a means for communicating the improving agent is provided at the sliding contact between the digging rod and the stirring blade. A mixing and stirring device for roadbed improvement. (2) The mixing and stirring device for roadbed improvement as set forth in Patent No. 1, wherein the communication means is comprised of a spout formed in the digging rod and an injection port opened in the stirring blade. (3) The mixing and stirring device for improving A-board as set forth in claim 2, wherein either the spout or the inlet is formed as an arcuate long hole. (4) A mixing and stirring device for roadbed improvement, characterized in that the improving agent is added into the roadbed from the outer part of the stirring blade attached to the lower part of the digging rod that penetrates into the roadbed while rotating. (5) The mixing and stirring device for roadbed improvement according to claim 4, characterized in that an addition slit is opened on the rear side in the rotational direction of the outer part of the stirring blade. (6) A stirring blade that can be opened and closed is provided at the bottom of the digging rod that rotates and penetrates into the roadbed, and a plurality of independent communication means are provided at the sliding contact portion between the digging rod and the stirring blade. 1. A mixing and stirring device for roadbed improvement, characterized in that two or more types of improving agents are fed separately, combined in the stirring blade, and added to the roadbed. (7) A stirring blade is attached to the bottom of the digging rod that rotates and penetrates into the roadbed so that it can be opened and closed, so that when the stirring blade is closed, its tip extends downward from the lower end of the digging rod. A mixing and stirring device for roadbed improvement, characterized in that it is configured as follows.