JPH04306394A - Stabilizer manufacturing device - Google Patents

Abstract

PURPOSE:To prevent the generation of excessive vacuum between places filled with powdered body absorption pipes in discharge ports by supplying a powdered body and air to the insides of the discharge ports by negative pressure caused by discharging water from the discharge ports through the powdered body absorption pipes and air absorption pipes, and mixing the powdered body with discharged water together with air. CONSTITUTION:When water supplied into an impeller casing 13 is injected to the inside of a stirring water tank 10 through injection nozzles 18d, 18e and 18f, negative pressure is generated in a powdered body mixing space in discharge ports 17a, 17b and 17c. The powdered body 22 is injected into a mixing space of the injection nozzles 18d, 18e and 18f by the negative pressure through a powdered body absorption pipe 19d, a collecting cylinder 20, absorption pipes 19a, 19b and 19c and is mixed with the discharged water. At that time, air is mixed into the discharged water flowing into ejector nozzles in the discharge ports 17a, 17b and 17c through air absorption pipes 52a, 52b, 52c and 52d linked with the air. The powdered body 22 is mixed with the discharged water mixed with air bubbles in the mixing space to discharge it into the water tank 10.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is capable of uniformly producing a large amount of mixed liquid, such as a stable liquid (sludge preparation) used in excavation work, made by mixing and stirring powder and granules, all at once. This invention relates to a stabilizing liquid manufacturing device.

0002

[Prior Art] Conventionally, in order to smoothly carry out drilling operations such as boring, underground piles, and pilot holes for underground continuous walls, stabilizing liquid (
Excavation work is carried out while injecting mud into the borehole.

[0003] As an apparatus for producing such a stable liquid,
The present applicant previously disclosed in Japanese Patent Application No. 1-19087 a stabilizer liquid manufacturing apparatus B having the following configuration.

That is, as shown in FIGS. 7 and 8, the apparatus B includes a submersible pump 103 provided with a suction port 101 and a plurality of discharge ports 102 in a stirring water tank 100. At least one of the pipes 102 is opened into the stirring water tank 100, and the other end of a powder suction pipe 105 whose one end is connected to the powder supply source 104 is connected to the discharge port 100. The discharge port 102 is characterized by a structure in which powder particles 106 such as bentonite can be sucked into the discharge port 102 by the discharge negative pressure generated within the discharge port 102 .

[0005] Furthermore, as shown in FIG. 9, an ejector nozzle 107 is disposed inside the discharge port 102.
A powder mixture space 108 is formed in front of the ejector nozzle 107 .

With the above configuration, the submersible pump 103
With the operation of , water is sucked from the suction port 101 and water is discharged from the discharge port 102 . Using the negative pressure generated by the discharge, that is, by the ejector effect, the water is drawn through the powder suction pipe 105 , and the water is discharged from the discharge port. 102
Powder-like powder 106 is fed into a powder mixing space 108 formed inside and mixed with the discharge water, and then the mixed liquid can be discharged from the discharge port 102.

[0007] In such an operation, the granular material 106 is
When mixed with discharge water, it is instantly mixed with water, and then
It is discharged from the discharge port 102 and stirred in all directions. Therefore, a stable solution with uniform concentration can be produced quickly and in large quantities.

[0008] In FIGS. 7 and 8, 109 is a mud pump.

[0009]

[Problems to be Solved by the Invention] However, the conventional stabilizer liquid manufacturing apparatus B still has the following problems to be solved.

That is, when the powder suction pipe 105 is clogged with powder 106, the inside of the powder suction pipe 105 between the clogged part and the powder mixing space 108 becomes a high vacuum. As a result, a part of the discharged water that has flowed into the powder mixture space 108 flows back into the powder suction pipe 105 , solidifies the powder 106 , and solidifies the powder suction pipe 105 .
5 will be completely blocked.

[0011] An object of the present invention is to provide a stabilizing liquid manufacturing apparatus that can solve the above problems.

0012

[Means for Solving the Problems] The present invention provides a submersible pump provided with a suction port and a plurality of discharge ports in a stirring water tank, and at least one of these discharge ports is connected to the stirring water tank. The other end of the powder suction pipe is opened and the other end of the powder suction pipe is connected to the powder supply source, and the other end of the air suction pipe whose one end is open to the atmosphere is connected to the discharge port. This invention relates to a stabilizing liquid manufacturing apparatus characterized in that it is configured to be able to suck powder and air into a discharge port by the discharge negative pressure generated.

[0013] As the powder, bentonite, cement, sand, straw, etc. can be used.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the stabilizer manufacturing apparatus A according to the present invention will be specifically explained below based on the embodiments shown in the attached drawings.

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

A submersible pump 12 is mounted upright on the center of the bottom plate 11 inside the stirring water tank 10.

As shown in FIG. 1, the submersible pump 12 includes an impeller casing 13 which rotatably surrounds an impeller 13a therein, and an impeller casing 13 connected to the impeller casing 13.
It consists of a motor casing 14 that is connected to an impeller 13a and has a built-in motor 14a for rotating 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 1
3, as shown in FIGS. 1 and 2, has a suction port 16 in the center of its front part, and a plurality of (three in this embodiment) discharge ports 17a, 17b, 17c on its outer periphery.
has been established.

As shown in FIG. 3, each discharge port 17
a, 17b, 17c, there is an ejector nozzle 5 inside.
In front of the ejector nozzle 50, a powder mixture space 51 is formed.

Further, the discharge ports 17a, 17b, 17c have discharge openings 18a, 18b, 18c connected to the submersible pump 1.
Trumpet-shaped jet nozzles 18d, 18e, and 18f are attached to provide the jets at positions separated from the jets 2.

[0022] Discharge ports 17a and 17b having such a configuration
, 17c are used to discharge a liquid mixture of powder, air, and water into the stirring water tank 10. 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 casing 13, so that the mixed liquid can be smoothly discharged and fed.

That is, as shown in FIGS. 1, 2 and 3,
The base ends of the discharge ports 17a, 17b, 17c are connected to the lower ends of a plurality of lower powder suction pipes 19a, 19b, 19c, which communicate with the powder mixture space 51 described above. Body suction pipes 19a, 19b, 19c
The upper end of is connected to the peripheral wall of the collecting cylinder 20 in communication.

On the other hand, on the upper surface of the collection cylinder 20, a filter 2 is attached to a powder 22 such as bentonite in a powder storage bag 21, which serves as a powder supply source and has one end provided outside the stirring water tank 10.
The other end of the upper powder suction pipe 19d inserted through the pipe 3 is connected for communication.

Further, an on-off valve 19e is provided in the middle of the upper powder suction pipe 19d, and by opening and closing the valve 19e, the powder 22 is supplied in a form that suits the construction conditions at the construction site.・Can be stopped.

Furthermore, as shown in FIGS. 1, 2 and 3, a plurality of air suction pipes 52a, 52b are connected to the base ends of the discharge ports 17a, 17b, 17c, and communicate with the internal space of the ejector nozzle 50. , 52c are connected in communication with each other, and the lower air suction pipes 52a, 52b,
The upper end of 52c is connected to an upper air suction pipe 52d, which extends above the stirring water tank 10 and opens its upper end to the atmosphere.

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

Furthermore, as shown in FIG.
An on-off valve 43 is provided at the top of the .

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

First, the on-off valve 19e provided in the middle of the upper powder suction pipe 19d is opened, and the on-off valve 43 provided on the mud feeding hose 42 is closed, thereby shutting down the submersible pump 12 and the mud feeding pump. 40.

[0031] Due to the same drive, the impeller casing 13
The inner impeller 13a rotates, and water is sucked into the impeller casing 13 from the suction port 16 by this rotation.

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

Furthermore, in the above-mentioned discharge operation, the discharge port 17
Negative pressure will be generated in the powder mixture space 51 inside a, 17b, and 17c.

Due to this negative pressure, that is, due to the ejector effect, the powder 22 in the powder storage bag 21 is
Upper and lower powder suction pipes 19d →Collecting tube 20→
19a, 19b, 19c, each discharge port 18d,
18e, 18f are ejected into the powder mixture space 51,
It is mixed with the discharged water flowing through the discharge ports 18d, 18e, and 18f to produce a mixed liquid.

By the way, in this embodiment, this negative pressure causes the air suction pipes 52a, 52b, 5, which communicate with the atmosphere, to
2c, 52d, air is also ejected through the ejector nozzle 50.
If it gets mixed in with the discharge water flowing through the interior, it will become a problem. Therefore, the discharged water mixed with air bubbles is
The powder 22 flows into the powder mixing space 51, and the powder 22 is mixed into this discharged water mixed with air bubbles, and is then discharged into the stirring water tank 10.

In this way, the jet nozzles 18d, 18e,
The discharged water discharged or spouted into the stirring water tank 10 through 18f contains not only the powder 22 but also air, so if the powder suction pipe 19d is clogged by the powder 22, Also, it is possible to prevent excessive vacuum from being generated between the particulate material mixing space 51 and the part where the powder material suction pipe 19d is clogged, and water discharged from the powder material mixing space 51 into the powder material suction pipe 19d. flows back, and the same powder 2
2 can be reliably prevented from solidifying completely.

[0037] Thereafter, the mixed liquid is ejected through the jet nozzles 18d, 1
8e and 18f are powerfully ejected into the stirring water tank 10.

In this operation, the powder 22 is instantaneously mixed with the water W when mixed with the discharged water W, and is stirred in all directions within the stirring water tank 10.

[0039] Therefore, a stable solution having a uniform concentration can be produced quickly and in large quantities.

Furthermore, in this embodiment, the discharge port 18a
, 18b, 18c contains air, so that a strong stirring flow can be formed in the stirring water tank 10, which further promotes uniformity of the concentration of the above-mentioned stabilizing liquid. be able to.

Thereafter, when the on-off valve 43 provided on the slurry feed hose 42 is opened, the stabilized liquid produced in the manner described above flows from the discharge port 41 of the mud feed pump 40 to the slurry feed hose 42.
Through this, it is quickly and reliably supplied to the desired excavation hole, etc.

Moreover, in parallel with this mud feeding action, the above-mentioned powder and granule mixing and stirring actions are continuously carried out, so the mud feeding action can be carried out continuously while maintaining a uniform concentration of the stabilizing liquid. This can improve the efficiency of excavation work.

[0043] In the above embodiment, the submersible pump 1
2 is shown as having only the impeller 13a, but the motor 14 to which the impeller 13a is attached
It is also possible to extend the output shaft of a downwardly and attach a stirring blade to the extended part.

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

Next, another embodiment of the stabilizer production apparatus A according to the present invention will be described with reference to FIGS. 4 and 5.

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. Note that parts having the same configuration as the stabilizer 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 impeller casing 13 is bent upward, and the lower end of the mud feeding pipe 24 is located at the upward bent end. One end of a flexible mud feeding hose 25 is connected to the upper end of the mud feeding pipe 24, and the other end of the mud feeding hose 25 is inserted into a desired excavation hole. .

Furthermore, as shown in FIG. 1, the mud feeding pipe 24
An on-off valve 26 is provided at the top of the holder.

[0049] With the above structure as well, it is possible to produce a stable liquid with a uniform concentration by strongly mixing and agitating the powder and air, as in the above-mentioned embodiments, and furthermore, it is possible to produce a stable liquid with a uniform concentration. In parallel with this action, the above-mentioned mixing and stirring of the powder and granules continues, so the mud feeding action can be carried out continuously while maintaining a uniform concentration of the stabilizing liquid, which improves the excavation work. efficiency can be improved.

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

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

[0052] This modified example is characterized by a configuration in which the powder supply source is a stabilizing liquid existing in the drilled hole, and the stable liquid can be fed from the old drilled hole to the new drilled hole. .

That is, in FIG. 6, 30 and 31 are new and old excavated holes, respectively. A concrete foundation 33 has been placed in the old excavated hole 31, and the stabilizing liquid 22 is floating above it. .

On the other hand, the foundation has not yet been poured into the newly excavated hole 30.

The stabilizer liquid manufacturing apparatus A according to this embodiment inserts one end of the upper particulate matter suction pipe 19c into the particulate matter 22 in the old excavation hole 31, and also inserts one end of the mud feeding hose 25. is inserted into the newly drilled hole 30.

With this configuration, similarly to the embodiment described above, the negative pressure generated by the submersible pump 12 is used to suck the stabilizing liquid 22 and air from the old excavation hole 31, and the water and air are efficiently mixed in the stirring water tank 10. A stable liquid can be produced by mixing and stirring well and uniformly, and the stable liquid can be continuously fed to the newly drilled hole 30.

By filling the inner surface of the newly excavated hole 30 with this stabilizing liquid, collapse of the excavated wall can be reliably prevented.

[0058] In Fig. 3, numeral 32 indicates a concrete charging device.

[0059] In the embodiments shown in FIGS. 1 to 5,
Although bentonite is used as a contaminant in water, the stable liquid production device according to the present invention can also contain other raw materials that can produce a slurry by mixing with water, such as fly ash,
It can also be applied to cement, cement admixtures, sand, straw, etc. That is, in the present invention, the granular material includes not only bentonite but also raw materials such as the above-mentioned cement.

[0060]

[Effects of the Invention] With the above-described configuration, the present invention has the following effects.

[0061] 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:
By the ejector effect, the powder and air are fed into the discharge port through the powder and air suction pipes, and the powder and the air are mixed into the discharged water, and then the mixed liquid is mixed with the air. can be discharged from the discharge port. In such an operation, the granular material is instantly dissolved in the water when mixed with the discharge water, and then discharged from the discharge port,
It will be stirred in all directions.

[0062] Therefore, a stable solution with uniform concentration can be produced quickly and in large quantities.

■Also, the mixed liquid discharged from the discharge port is
Because air is mixed in, even if the powder suction pipe becomes clogged with powder, it prevents excessive vacuum from being generated between the inside of the discharge port and the clogged part of the powder suction pipe. This can reliably prevent discharged water from flowing back into the powder suction pipe from the powder mixing space and completely solidifying the powder.

[0064] Furthermore, the mixed liquid discharged from the discharge port is
Since air is mixed in, a strong stirring flow can be formed in the stirring water tank, and the uniformity of the concentration of the above-mentioned stabilizing liquid can be further promoted.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional front view of an embodiment of a stabilizer manufacturing apparatus according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a cross-sectional side view of the same main part.

FIG. 4 is a cross-sectional front view of another embodiment.

FIG. 5 is a plan view of the same.

FIG. 6 is a cross-sectional front view of the modified example.

FIG. 7 is a cross-sectional front view of a conventional stabilizing liquid manufacturing apparatus.

FIG. 8 is a plan view of the same.

FIG. 9 is a cross-sectional side view of the same main part.

[Explanation of symbols]

A Stabilizing liquid manufacturing equipment 10 Stirring water tank 12 Submersible pump 16 Suction port 17a, 17b, 17c discharge port 18a, 18b, 18c jet nozzle 22 Powder material

Claims (1)

[Claims] Claim 1: A submersible pump having a suction port and a plurality of discharge ports is disposed in a stirring water tank, and among these discharge ports,
at least one outlet is opened in the stirring water tank, and
The other end of a powder suction pipe whose one end is connected to a powder supply source, and the other end of an air suction pipe whose one end is open to the atmosphere are connected to the above discharge port, and the discharge negative pressure generated within the discharge port is A stable liquid manufacturing device characterized by having a structure capable of sucking powder and air into a discharge port.