JPH02200994A - Stabilizer manufacturing device - Google Patents

Abstract

PURPOSE:To obtain stabilizer of uniform composition at a low cost and in short time by arranging a submergible pump equipped with a suction port and a plurality of discharge ports in an agitated water tank and constituting a titled device so as to allow it to suck bentonite or the like into the discharge ports by the discharge negative pressure generated in the discharge ports. CONSTITUTION:A submergible pump 12 is erectly placed on the center of the bottom plate 11 of an agitated water tank 10. In the next step, a suction port 16 is provided at the front center section of an impeller casing 13, and a plurality of discharge ports 17a, 17b and 17c (three pieces in the example) are also provided on the peripheral edge of the suction port 16. The submergible pump 12 and a mud sending pump 40 are driven to suck water into the impeller casing 13. Then, the water flowed into the impeller casing 13 is discharged or spouts into the agitated water tank 10 through the discharge ports 17a, 17b and 17c and exhaust nozzles 18d, 18e and 18f. At this moment during discharging work, negative pressure is generated in discharge openings 18a, 18b and 18c.

Description

[Detailed description of the invention] (a) Industrial application field The present invention provides a method for stabilizing liquid (sludge) used in excavation work.
- It relates to a stabilizer liquid manufacturing device that can produce sludge uniformly and in large quantities.

(b) Conventional technology Traditionally, in order to smoothly perform excavation work such as well drilling and pilot holes for pits, a stabilizing liquid (sludge) made by mixing bentonite and water was injected into the excavation chamber. Meanwhile, excavation work is being carried out.

Stabilizing liquid manufacturing apparatuses B and C shown in FIGS. 6 and 7 are known as such stabilizing liquid manufacturing apparatuses.

First, the stable liquid manufacturing apparatus B shown in FIG. 6 will be explained. The manufacturing apparatus B is equipped with an adjustment tank a in which a stirring pump b and a slurry pump C are installed, and a mixer d inside. It consists of a mud tank C.

In this configuration, first, bentonite f and water g are put into the mud making tank e, and are stirred by the mixer d to produce a stable slurry.

Furthermore, the same stable liquid is put into the adjustment tank a and stirred by the stirring pump b, and the stable liquid whose composition has become uniform due to the stirring is passed through the mud feeding vibrator i and into the excavation hole (not shown). can be sent.

On the other hand, to explain the stable liquid manufacturing device C shown in Fig. 7, the manufacturing device C is equipped with a stirring/sludge pump j larger than the above-mentioned stirring pump b and a mud feeding pump C. It consists of a regulating tank a.

In this configuration, bentonite f is charged into an adjustment tank a filled with water g, and is stirred and mud-formed by a stirring/sludge-forming pump j, and a stable slurry manufactured to have a uniform composition by the stirring/sludge-forming pump j is added. Vibrator 1 for transporting liquid and slurry
It can be fed to an excavation hole (not shown) through the feed hole.

(c) Problems to be solved by the invention However, such conventional stabilizer liquid manufacturing apparatuses B and C still have the following problems:
The project had the following issues to be solved.

■Stable liquid manufacturing device shown in Figure 6! Since B requires an expensive mixer d, the stabilizer production device B itself is also expensive, and it is a two-step process in which the slurry is made in the slurry tank e and then adjusted in the adjustment tank a. Therefore, it takes a considerable amount of time to produce a stable liquid with a uniform composition.

■On the other hand, in the stabilizing liquid manufacturing apparatus C shown in Fig. 7, rice tonite r is directly added to the adjustment tank a without using the mud preparation tank e in advance.
Since the bentonite f is only stirred and mud-formed using - stirring/sludge pumps i, the bentonite f is not completely dissolved, and a large amount of bentonite 2 is deposited at the bottom of the adjustment tank a. remains, and the particles of bentonite f in the stable liquid also become larger.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stable liquid manufacturing apparatus that can solve the above-mentioned problems.

(D) Means for Solving the Problems The present invention provides a submersible pump having a suction port and a plurality of discharge ports in a stirring water tank.
One of them is opened in the stirring water tank, and the above discharge port is
A device for producing a stable liquid, characterized in that one end of the bentonite suction pipe is connected to a bentonite or the like supply source, and the other end of the bentonite suction pipe is connected to the bentonite or the like suction pipe, so that bentonite or the like can be sucked into the discharge port by the discharge negative pressure generated within the discharge port. This is related.

(e) Action and effect With the above configuration, the present invention has the following effects.

■In the present invention, when the submersible pump operates, water is sucked from the suction port and water is discharged from the discharge port, and the negative pressure generated by the discharge is used to pass the bentonite etc. through the suction pipe using the ejector effect. Powdered bentonite or the like can be fed into the discharge port and mixed with the discharge water together with air, and then the mixed liquid can be discharged from the discharge port.

In this operation, bentonite and the like are instantaneously dissolved in the water when mixed with the discharge water, and then are discharged from the discharge port and stirred in all directions.

Therefore, a stable solution with uniform concentration can be produced quickly and in large quantities.

■Furthermore, since the mixed liquid discharged from the discharge port contains air, it is possible to form a strong stirring flow in the stirring water tank, further promoting uniformity of the concentration of the above-mentioned stable liquid. Can be done.

(F) Example Hereinafter, the configuration of the stabilizer manufacturing apparatus A according to the present invention will be specifically explained based on the example shown in the attached drawings.

In FIGS. 1 and 2, 10 is a stirring water tank in which water W is stored up to a certain height H.

The inside of the stirring water tank 10 has a bottom 111.
A submersible pump 12 is placed upright on the central portion of the tank.

As shown in FIG. 1, the submersible pump 12 includes an impeller casing 13 that rotatably surrounds an impeller L3a.
and a motor casing 14 that is connected to the impeller casing 13 and has a built-in motor 14a that is connected to the impeller 13a and rotates the impeller 13a.

Note that 15 is a support base on which the submersible pump 12 is placed and supported.

In the above configuration, the impeller casing 13 has a suction port 16 in the front central part thereof, as shown in FIGS. 1 and 2.
A plurality of (three in this embodiment) discharge ports 17a, 17b, and 17c are provided on the outer periphery of the discharge port.

Further, the discharge ports 17a, 17b, and 17c are provided with *l! in order to bring the discharge ports 18a, 18b, and 18c to a position separated from the submersible pump 12. 71-shaped jet nozzle 18d
, 18e, and 18f are installed.

As explained below, the discharge port 17a,
17b and 17c are used to discharge a mixed liquid of bentonite, air, and water into the stirring water tank IO.

Note that the discharge directions of the discharge ports 17a, 17b, and 17c extend in the tangential direction of the outer peripheral edge of the impeller 13a,
This allows for smooth discharge and feeding of the mixed liquid.

That is, as shown in FIGS. 1 and 2, the discharge ports 17a,
The lower ends of a plurality of lower bentonite suction vibes 19a, 19b, 19c are connected to the base ends of the lower bentonite suction vibes 19a, 17b and 17c.
, 19b and 19c are connected to the collecting tube 20 at their upper ends.

The collecting cylinder 20 is connected to the other end of an upper bentonite suction vibrator 19d inserted through a filter 23 into bentonite 22 in a bentonite storage bag 21 as a supply source of bentonite etc., which is provided at one end outside the stirring water tank IO. connected.

In addition, an opening/closing valve 19e is provided in the middle of the upper bentonite suction vibe 19d, and by opening and closing the valve 19e, a configuration suitable for the construction conditions at the construction site, that is, supplying bentonite 22, supplying air, Alternatively, a configuration may be adopted in which neither bentonite 22 nor air is supplied.

In addition, as shown in FIGS. 1 and 2, in one corner of the stirring water tank 10, there is provided a slurry pump 40 having a suction port at the bottom.
One end of a flexible mud feeding hose 42 is connected to a discharge port 41 provided at the top of the mud feeding pump 40, and the other end of the mud feeding hose 42 is connected to a discharge port 41 provided at the top of the mud feeding pump 40. inserted into the drilled hole.

Further, as shown in FIG. 1, an on-off valve 43 is provided at the upper part of the mud feeding hose 42.

Next, the procedure for using the stabilizer manufacturing apparatus A having the above configuration will be explained with reference to FIGS. 1 and 2.

First, the on-off valve 19e provided in the middle of the upper bentonite suction vibrator 19d is opened, and the on-off valve 43 provided on the mud feeding hose 42 is closed, and the submersible pump 12 and the mud feeding pump 40 are driven.

This drive causes the impeller 13a inside the impeller casing 13 to rotate, and this rotation causes water to be sucked into the impeller casing 13 from the suction port 16.

The water that has flowed into the impeller casing 13 is discharged from the impeller casing 13 through the discharge ports 17 a + 17 b + 17
c and the jet nozzles 1.8d, +8e, and 18f into the stirring water tank 10.

Further, in the above-mentioned discharge operation, the discharge opening 18a.

Negative pressure will be generated within 18b and 18C.

Then, due to this negative pressure, that is, due to the ejector effect, the powdered bentonite 22 in the bentonite storage bag 21 is transferred to the upper and lower bentonite suction vibes 19d.
+ Through collecting cylinders 2O-19a, 19b, 19c,
It is ejected together with air into each of the discharge ports 17a, 17b, and 17c, and is mixed with the discharged water flowing through the discharge ports 17a, 17b, and 17c, to produce a mixed liquid.

After that, the mixed liquid is sent to the jet nozzles 18d, 18g, 1
It will be powerfully sprayed into the stirring water tank 10 from 8f.

In such an operation, the bentonite 22 is instantaneously dissolved in the water W when mixed with the discharge water W, and is then discharged from the jet nozzle 18d through the discharge ports 17a, 17b, and 17c.
, IBe, 18! It is discharged from the tank and stirred in all directions in the stirring water tank.

Therefore, a stable solution with uniform concentration can be produced quickly and in large quantities.

Furthermore, in this embodiment, the discharge ports 17a and 17b.

Since the mixed liquid discharged from 17c contains air, it is possible to form a strong stirring flow in the stirring water tank IO, which can further promote uniformity of the concentration of the above-mentioned stabilizing liquid. .

Thereafter, when the on-off valve 43 provided on the mud feeding hose 42 is opened, the stable liquid produced in the above manner is passed through the mud feeding hose 42 from the discharge port 41 of the mud feeding pump 40 to the desired excavation hole, etc. will be supplied quickly and reliably.

Moreover, in parallel with this mud feeding action, the above-mentioned bentonite mixing and stirring action is continuously performed, so the mud feeding action can be performed continuously while maintaining a uniform concentration of the stabilizing liquid. , can improve the efficiency of excavation work.

In the above embodiment, the submersible pump 12 is shown as having only the impeller 13a, but the output shaft of the motor 14a to which the impeller 13a is attached extends downward, and a canter is provided on the extending part. can also be installed.

In this case, the mixing of bentonite 22 and water can be further promoted, the particles of bentonite 22 can be further made finer, and the stabilizing liquid can be made more uniform.

Next, another embodiment of the stabilizer manufacturing apparatus A according to the present invention will be described with reference to FIGS. 3 and 4.

This embodiment is essentially characterized by a configuration in which the submersible pump 12 has not only a stirring function but also a mud feeding function. Incidentally, parts having the same configuration as the stabilizer liquid cleaning device A shown in FIGS. 1 and 2 described above are indicated by the same reference numerals.

In this embodiment, as shown in FIGS. 3 and 4, the tip of the discharge port 17c of the submersible pump I2 is bent upward, and the lower end of the mud feeding vibrator 24 is attached to the upward bent end. One end of a flexible mud feeding hose 25 is connected to the upper end of the mud feeding vibrator 24, and the other end of the mud feeding hose 25 is inserted into a desired excavation hole.

Further, as shown in FIG. 1, an on-off valve 26 is provided at the upper part of the mud feeding vibe 24.

With the above configuration, it is possible to produce a stable liquid with a uniform concentration by powerfully mixing and stirring bentonite, as in the above-mentioned embodiment. Since the bentonite mixing and stirring action is also performed continuously, the mud feeding action can be performed continuously while maintaining a uniform concentration of the stabilizing liquid, and the efficiency of excavation work can be improved.

Furthermore, in this embodiment, charging of bentonite 22, preparation of mud, stirring, and feeding of mud can be performed using a single submersible pump 12, and the stable liquid manufacturing apparatus A can be manufactured at low cost.

Next, a modification of the above embodiment will be described with reference to FIG.

This modified example is characterized by a configuration in which the bentonite etc. supply source is bentonite that floats up during excavation, and the bentonite can be fed from a heavy excavation hole to a new excavation hole.

That is, in FIG. 5, 30 and 31 are the new and old excavation holes, respectively, and there is a concrete foundation 33 in the heavy excavation hole 31.
is poured, and bentonite 22 is floating above it.

On the other hand, lle has not yet been drilled into the newly drilled hole 30.

The stabilizing liquid manufacturing apparatus A according to this embodiment has an upper bentonite vibrator 19c connected to one end of the vibrator 19c in a heavily excavated hole 3.
At the same time, one end of the mud feeding hose 25 is inserted into the newly excavated hole 30.

With this configuration, similar to the embodiment described above, the negative pressure generated by the submersible pump 12 is used to suck the hentonite 22 from the heavily excavated hole 41 and stir water I! A stable liquid can be produced by efficiently and uniformly mixing and stirring with water in 1O, and the stable liquid can be continuously fed to the newly drilled hole 30.

By applying such a stabilizing liquid to the inner surface of the newly excavated hole 30, collapse of the excavated wall can be reliably prevented.

In addition, in FIG. 3, 32 indicates a concrete charging device.

As mentioned above, in the embodiments shown in FIGS. 1 to 5, bentonite 22 was used as a contaminant in water, but the device for producing a stable liquid according to the present invention produces a slurry by mixing it with water. It is also applicable to other possible raw materials, such as cement.

That is, in the present invention, bentonite and the like include not only hentonite 22 but also raw materials for the above-mentioned cement and the like.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view of one embodiment of the stabilizer production apparatus according to the present invention, FIG. 2 is a plan view thereof, and FIGS. 3 and 4 are a cross-sectional front view and a plan view of other embodiments. FIG. 5 is a cross-sectional front view of a modification thereof, and FIGS. 6 and 7 are cross-sectional front views of a conventional stabilizing liquid manufacturing apparatus. In the figure, A: Stable liquid production device 0: Stirring water tank 2: Submersible pump 6: Suction port a 17b, 17c: Discharge port 8d, I8s, 18f: Spray nozzle 22: Bentonite

Claims (1)

[Claims] 1. A submersible pump having a suction port and a plurality of discharge ports is installed in the stirring water tank, and at least one of these discharge ports is opened into the stirring water tank, and A stable liquid manufacturing device characterized in that one end of the bentonite suction pipe is connected to a supply source of bentonite or the like, and the other end of the bentonite suction pipe is connected to the bentonite suction pipe so that bentonite or the like can be sucked into the discharge port by a discharge negative pressure generated within the discharge port.