JPS6231459Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is based on the bentonite liquid used as a stabilizing liquid for excavated trench walls when constructing underground continuous walls, etc.
In a device that adds a caking agent and mixes it with a stirring blade, the stirring blade is rotated by an air motor, and the exhaust air from the motor is passed through the internal hole of the rotating shaft to the stirring blade. At the same time as stirring the liquid by ejecting it from the surface into the liquid,
The feature is that the reaction is used to assist the rotation of the rotating shaft.

When constructing underground continuous walls, etc., it is possible to add a solidifying agent to the bentonite liquid used as a stabilizing liquid and stir it with a stirring blade, or to solidify the stable liquid by blowing out air. Although conventionally used, all of these methods have drawbacks such as inefficient stirring operation and a long time required for solidification. In order to eliminate this drawback and operate efficiently, the present invention uses an air motor to rotate the stirring blades, and instead of immediately discharging the air that drives this motor, it is transferred to a hollow rotating shaft. The stabilizing liquid is ejected laterally from the surface of the stirring blade through the inside, and the stabilizing liquid is stirred and its reaction is used to assist the rotation of the stirring blade. is the outer casing of the device main body, and the air motor 2 is equipped with an air distribution valve 3 on the top.
The upper end of the rotating shaft 7, which has a stirring blade 5 and a through hole 6 in the center, is connected to the lower part of the rotating shaft 4 by a coupling ring 8, and the outer periphery is connected to the inside of the outer casing 1 by a bearing 9. , 9', and is rotated by compressed air supplied from an air supply pipe 10 to the air motor 2. Therefore, in the present invention, the exhaust air from the air motor 2 is not directly discharged, but the outlet 11' of the exhaust pipe 11 is connected to a swivel 12 installed in the middle of the rotating shaft 7, and the exhaust gas is connected to the rotating shaft through this. Exhaust air is supplied to the through hole 6 of. In the present invention, in order to blow out the exhaust gas sent to the through hole 6 of the rotating shaft from the stirring blade 5, a horizontal hole 6' communicating with the through hole 6 is provided as shown in FIG. A mounting seat 13 is provided on the outer periphery of the rotating shaft 7, with the threaded portion 5' of the stirring blade 5 screwed onto the mounting seat 13, and is fixed by a lock nut 14, and the horizontal hole 12 is provided at the center of the mounting seat 13. A through hole 15 is provided to communicate with the ejection holes 16 provided on the surface of the stirring blade 5. As shown in FIG. 3, this jet hole 16 is provided with a jet port so as to exhaust air in a direction opposite to the direction of rotation in order to assist the rotational force. Further, the stirring blade 5 is adjusted to an arbitrary angle depending on the degree of stirring, and then a lock nut 14 is pressed against the mounting seat 13 to fix it. Further, the rotating shaft 7 is divided into two parts at the middle, and a check valve 17 is interposed in this part, as shown in FIG. 4, to prevent backflow from the stirring blades.

As shown in FIG. 5, the stirring device configured as described above has a guide plate 18 on the outside of the outer casing 1 of the main body.
It is attached so that it can be moved back and forth, and is set between the walls of the excavation trench into which it is inserted, and is inserted into the trench using this as a guide. This stirring device is operated by housing a suitable number (two in the figure) in a mounting frame 19 and suspending them into an excavated trench by means of a hanging wire 21 attached to a hanging ring 20. . In addition, for the main body housed in the mounting frame in this way, the solidifying agent injection pipe 22
is disposed, and its tip discharge port 22' is opened near the stirring blade 5, so that the solidifying agent is spouted out.

To explain the operation of the stirring device constructed in this way, first, the suspension wire 21 of the main body is suspended by a crane, and as shown in FIG. If compressed air is sent to the motor 2 through the air supply pipe 10 to drive it, the rotating shaft 4 will rotate.
At the same time, the rotating shaft 7 connected to the lower part of the rotating shaft 7 rotates and the stirring blade 5 fixed to the rotating shaft 7 stirs the stabilizing liquid b, and the exhaust gas that drives the motor 2 is transferred to the exhaust pipe 1
1, passes through the swivel 12 in the main body 1, passes through the through hole 6 of the rotating shaft 7, and passes through the horizontal hole 12 and the through hole 15.
From the spout 16 of the stirring blade 5, the stable liquid b
Since it is ejected into the interior, it is better agitated, and at the same time, the reaction of the ejection assists the rotation of the rotating shaft. At the same time, the mortar pump d is operated to stir the mortar from the injection pipe e to the stirring blade 5.
By supplying the mixture near the agitator, it is strongly agitated by the rotation of the agitation blade and the exhaust gas that blows out.
The solidifying agent is completely and quickly mixed with the stabilizing liquid and solidified, so that the stabilizing liquid can be used as it is as a water-stopping wall or the like.

By loosening the lock nut and adjusting the direction of the surface of the stirring blade 5 attached to the rotating shaft 7 to an arbitrary angle, the direction in which the exhaust gas is ejected and the degree of stirring can be adjusted to the stabilizing liquid and the mixture. It can be set to suit any type of solidifying agent.

As described above, according to the stirring device of the present invention, the exhaust gas that drives the air motor is used for stirring the stable liquid by passing it through the rotating shaft and ejecting it into the stable liquid from the surface of the stirring blade. Since the rotation is assisted by the use of reaction, it has practical effects such as being able to perform stirring and solidification work with extremely high efficiency.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing the configuration of the present invention;
Figure 2 is a cutaway side view of the connecting part between the rotating shaft and the exhaust pipe, Figure 3 is a partially cutaway plan view of the stirring blade attachment part to the rotating shaft, and Figure 4 is a cutaway side view of the check valve part of the rotating shaft. FIG. 5 is a side view showing an assembly mode, and FIG. 6 is a side view showing a usage mode. 1. Main body outer casing, 2. Air motor,
3... Air distribution valve, 4... Rotating shaft, 5... Stirring blade, 5'... Stirring blade mounting screw, 6... Through hole,
6'...Horizontal hole, 7...Rotating shaft, 8...Coupling, 9,9'...Bearing, 10...Air supply pipe, 11...Exhaust pipe, 11'...Air outlet, 1
2...Swivel, 13...Mounting seat, 14...Lock nut, 15...Through hole, 16...Air outlet,
17...Check valve, 18...Guide plate, 19...Mounting frame, 20...Hanging ring, 21...Hanging wire, 2
2. Solidifying agent injection pipe, 22'... Outlet.

Claims (1)

[Scope of utility model registration request] An appropriate number of stirring blades 5 are installed at the bottom of a rotating shaft 7 that is connected to the air motor shaft 4 and has a through hole 6 in the center.
is provided, and an air outlet 1 is provided on the surface of this stirring blade.
6... is provided, and this jet port is communicated with the through hole 6 of the rotating shaft, and the upper part of this through hole is connected through the swivel 12 with the exhaust pipe 11 of the air motor 2, thereby discharging the exhaust gas that drives the air motor. A device for mixing and stirring a solidifying agent for an excavated trench wall stabilizing liquid, characterized in that it is configured to spray a solidifying agent into the stabilizing liquid from the surface of stirring blades 5.