JP2001191321A - Method and apparatus for preparing slurry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for preparing a large amount of slurry at a time. SOLUTION: The slurry having a property of solidifying with time and constituted of a plurality of mixture components is prepared by a process wherein jet streams of water, air or a mixed fluid thereof are supplied into a casing 12 having an inner surface 22 formed of a cylindrical surface, during or after the mixture components of the slurry are charged in the casing, and thereby whirling movements along the inner surface of the casing are generated in the mixture components, so that the components be mixed. The casing is provided with a plurality of jet holes 14 for supplying the jet streams 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a slurry having a property of solidifying over time, such as cement concrete and soil cement, which are structural materials for civil engineering and construction, and in particular, mass production of the slurry. A method and apparatus suitable for

[0002]

2. Description of the Related Art Conventionally, such slurries have been manufactured by putting the mixed components into a forced kneading mixer and stirring.

When the capacity of the forced kneading mixer increases, the rotational torque of the stirring blade increases synergistically. For this reason, for example, it is actually difficult to increase the size of the forced kneading mixer so that a large amount of slurry (cement concrete) required for dam construction can be manufactured at a time.

In the production of a slurry such as soil cement containing locally generated soil generated at a construction site as a mixed component, gravel mixed in the locally generated soil may hinder the rotation of the stirring blade. is there. Further, long time stirring is required to peel off mud and the like adhering to the surface of the gravel to obtain a homogeneous slurry.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for producing large quantities of slurry at a time. Another object of the present invention is to provide a method and an apparatus capable of smoothly producing a slurry even when gravel is present in a mixed component.
Further, another object of the present invention is to provide a method and an apparatus capable of obtaining a homogeneous slurry without requiring a long time even when mud or the like adheres to the surface of gravel as a mixed component. Is to provide.

[0006]

SUMMARY OF THE INVENTION A slurry comprising a plurality of mixed components having a property of solidifying over time is supplied to a casing having a cylindrical inner surface during or after the mixed components are charged. It can be manufactured by supplying a jet of water, air, or a mixed fluid thereof into the casing, thereby causing the mixed component to swirl along the inner surface of the casing and mixing them. . The casing is provided with a plurality of nozzles for supplying the jet.

The direction of the jet may be alternately changed in both forward and reverse directions, whereby the direction of the swirling motion of the mixed component may be alternately changed in both forward and reverse directions. Further, another jet flow is supplied into the casing, whereby a convection or a spiral flow in the vertical direction can be generated in a part of the mixed component. In these cases, the casing is provided with a plurality of other nozzles for supplying the another jet.

[0008]

According to the present invention, it is possible to mix the mixed components by imparting a swirling motion along the inner surface of the cylinder with the energy of the jet to the mixed components of the slurry contained in the casing having the inner surface of the cylinder. Accordingly, the size of the apparatus can be increased without using the conventional stirring blade, and a large amount of slurry can be produced at once with a large-scale facility.

Further, even when the mixed component of the slurry contains gravels, unlike the case of the conventional stirring blade, the gravels can be smoothly mixed by being swirled. Further, mud and the like adhering to the surface of the gravel are easily and neatly blown off by the jet that hits the gravel,
Therefore, a uniform slurry can be obtained in a short time.

If the direction of the swirling motion is alternately changed in the forward and reverse directions, the mixing property can be further improved due to the collision of the swirling flows. In addition, a better mixing state with less stagnation can be obtained by further imparting another jet having a different jetting direction so that a part of the mixed component is convected vertically or swirled.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a slurry manufacturing apparatus is generally indicated by reference numeral 10.

The slurry produced by the slurry producing apparatus 10 includes, for example, cement concrete and soil cement containing or not containing locally generated soil generated at a construction site. ).

The cement concrete is used, for example, for dam construction, and the soil cement containing the locally generated soil is used, for example, for landfill treatment in a landfill. For example, they are used for the construction of underground diaphragm walls, respectively, and it is desirable that these can be supplied in large quantities at one time.

The slurry manufacturing apparatus 10 includes a casing 12
And a plurality of nozzles 14 provided in the casing.

The casing 12 is composed of a mixture of the above-mentioned slurries, that is, cement, aggregate, water and the like in the case of the cement concrete, and soil, cement, water, and even gravel (in the case of the soil cement) (see FIG. 1). (Not shown) and further define a space for mixing them.

The casing 12 has a cylindrical side portion 16 extending in the vertical direction, a dome-shaped top portion 18 connected to the side portion, and a circular flat bottom portion 20. Casing 12
Can have any shape other than the illustrated example as long as it has an inner surface 22 described later.

In the example shown, the side 16 is one of the casings.
2 and can accommodate almost all of the mixed components.

The side 16 of the casing has an inner surface 22 consisting of a cylindrical surface extending in the direction of extension, and each nozzle 14 is open to the inner surface 22. A discharge pipe 26 for taking out the produced slurry is provided below the side part 16. Instead of this example, as shown by an imaginary line, the bottom 20 of the casing may have a conical shape extending downward, and a discharge port 28 may be provided at the lower end thereof.

Further, two openings 30 are provided at the top 18 of the casing, and the mixed components of the slurry are as follows:
These predetermined amounts pass through each opening 30 to the casing 12.
(See arrow 32). The mixed component of the slurry can be conveyed to each opening 30 of the casing, for example, by a belt conveyor 34.

The plurality of injection ports 14 use water, air, or a mixed fluid of these (water and air) supplied into the casing 12 to impart a mixing action to the mixed component of the slurry in the casing 12 as a jet flow described later. For example, by a nozzle (not shown).

Each injection port 14 is connected to a pressurized fluid supply source (not shown) including a pump for supplying pressurized water, pressurized air or both of them, an air compressor or both of them through, for example, a pressure-resistant hose. It is connected. Therefore, by the operation of the pressurized fluid supply source, water, air, or a mixed fluid thereof can be ejected from each of the nozzles.

The mixed components introduced into the casing 12 are supplied with water,
A jet 36 of air or a mixture of these fluids is introduced or supplied to impart the flow energy of the jet 36 to the mixing component, whereby the mixing component moves circumferentially along the inner surface 22 of the casing. Motion can be caused to mix with each other, thereby producing a slurry. This is the same even when gravel is present as the mixed component, and a smooth slurry can be produced.

According to this, the number of the jets 14 and the jets 36
A large amount of mixed
Can generate a swirling flow every minute, and its swirling speed
The degree can be controlled to a desired value. For example, jet 3
The ejection pressure of No. 6 is about 1 × 10 ⁷~ About 1 × 10⁸Pascal's
Any value can be selected within a wide range.

The plurality of nozzles 14 are arranged in multiple stages at intervals in the vertical direction as shown in the illustrated example, and at intervals in the circumferential direction of the side portion 16 in each stage, for example, at equal intervals. can do.

The axis of each nozzle 14 in each stage is on a horizontal plane perpendicular to the axis of the side 16 of the casing. Also,
The axis of each nozzle 14 extends from a point on a circle 38 which is an imaginary intersection line between the horizontal plane and the inner surface 24 of the side portion to the axis of the side portion 16 from the above-mentioned arrangement point from the tangent line of the arrangement point of each nozzle 14. Within the angular range up to the line. Preferably, the angle between the axis of each injection port 14 in each stage and the tangent at the point where the injection port is arranged is the same.

[0026] Thereby, the flow energy is applied to the columnar mixed components deposited in the side portion 16 at a plurality of height positions, thereby causing the swirling flow to occur in all of the mixed components. Can be.

In addition to the nozzle 14, a plurality of nozzles 40 similar to this are provided.
A jet 42 of water, air, or a mixed fluid thereof can be supplied horizontally from another jet port 40 toward the axis of the casing side portion 16. In the example shown, four other nozzles 40
Are arranged in the vicinity of the four nozzles 14 of each stage at an angle of 90 degrees around the axis. The jet 42 from the jet 40 can be set to the same jet pressure as the jet 36 from the jet 14, for example. By supplying the jet 42 from the other injection port 40, the mixed component can be swirled in a dispersed state without aggregating at the center of the cylinder, thereby achieving more uniform mixing of the mixed component. be able to.

Further, instead of providing the injection port 40, or together with the installation of the injection port 40, a plurality of other injection ports (not shown) directed obliquely downward can be provided. By the supply of the jet from these other nozzles, it is possible to prevent the mixing component from being deposited on the casing bottom 20 during mixing, that is, during the swirling motion, and to achieve more uniform mixing.

Further, instead of providing the injection port 40,
Or, together with the installation of the nozzle 40, the bottom 2
A number of other orifices (not shown) can be provided at 0, especially at the center thereof, directed upward. According to this, a convection is generated at the center of the columnar mixed component, the mixed component is dispersed at the center, and more uniform mixing of the mixed component can be performed.

Further, instead of providing the injection port 40,
Or, together with the installation of the nozzle 40, the side 16 of the casing
In addition, a plurality of further nozzles (not shown) directed obliquely upward can be provided. These other orifices receive the jet 36 from the orifice 14 to generate a swirling flow in the swirling mixed component to prevent stagnation at the center of the mixed component and achieve more uniform mixing. be able to.

Further, instead of providing the injection port 40,
Alternatively, along with the installation of the spout 40, the spout 14
A plurality of other nozzles (not shown) may be provided for supplying a jet in a direction opposite to the jet 36 from the nozzle. However, the jets from these other nozzles are set to a size that does not stop the swirling motion of the mixed component. This also makes it possible to disperse the mixed components.

When the jet is water or the mixed fluid, the supply amount of the jet is limited to the water content of the slurry to be produced.

In the case where the mixed component contains gravel and mud is adhered to the surface of the gravel, the mud on the surface of the gravel is blown off by the jet stream hitting the gravel, and And is quickly mixed with other mixed components.

In order to make it easier to take out the manufactured slurry, the housing 12 can be previously inclined.

Further, a conventional stirring blade (not shown) can be additionally provided in the housing 12. At this time, the same impeller (not shown) as described above is further provided on the agitating blade, and a jet of water, air, or a mixed fluid of these can be supplied from this jet.

[0036]

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a slurry manufacturing apparatus.

FIG. 2 is a schematic diagram of a cross section of the slurry manufacturing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Slurry manufacturing apparatus 12 Housing 14 Orifice 22 Inner surface of housing 36 Jet 40 Other jet 42 Other jet

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Katsuei Nishiyama, Inventor 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo Head Office (72) Inventor Takeharu Yoshimura 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Kumagai Gumi Tokyo head office F term (reference) 4G056 AA07 CC01 CD21

Claims (7)

[Claims] 1. A method for producing a slurry comprising a plurality of mixed components having a property of solidifying with time, wherein the mixed components of the slurry are charged into a casing having an inner surface formed of a cylindrical surface, or during or after the charging. Supplying a jet of water, air or a mixture of these fluids into the casing, thereby causing the mixed component to swirl along the inner surface of the casing. 2. The method according to claim 1, further comprising feeding another jet into the casing, thereby causing vertical convection in a part of the mixed component. 3. The method of claim 1, further comprising providing another jet in the casing, thereby causing a vertical swirl in a portion of the mixed component. 4. The method according to claim 1, wherein the direction of the jet is alternately changed in both forward and reverse directions, whereby the direction of the swirling motion of the mixed component is alternately changed in both forward and reverse directions. 5. A casing having an inner surface consisting of a cylindrical surface capable of receiving a plurality of mixed components of a slurry having a property of solidifying over time;
A plurality of jets provided in the casing for supplying a jet of air or a mixed fluid thereof, thereby causing the mixed component to generate a swirling motion along the inner surface of the casing; and a slurry production apparatus. . 6. A plurality of other nozzles provided in the casing for supplying another jet into the casing, thereby causing a convection in a vertical direction in a part of the mixed component. An apparatus according to claim 5. 7. A plurality of other jets provided in the casing for supplying another jet into the casing, thereby generating a vertical swirl in a part of the mixed component. The apparatus of claim 5, comprising: