JP2001038181A - Powder slurrying apparatus and powder slurrying method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] When mixing powder and water, the contact state between the powder and water fine particles is refined to obtain a uniform slurry,
Provided is a powder slurrying apparatus in which powder is smoothly transported through a floating transport channel. SOLUTION: A compressed air inlet 21 and a high-pressure water inlet 22 are provided.
A high-pressure mist generator 2 for generating high-pressure mist, a high-pressure mist chamber 3 communicating with the high-pressure mist generator 2 and introducing high-pressure mist, A plurality of high pressure mist ejection holes 41 penetrating obliquely along the flow direction are formed, and the slurry pipe 4 inserted into the high pressure mist chamber 3 and the high pressure mist ejection holes 41 are located inside the high pressure mist chamber 3. A slurry pipe 4 is removably fixed to the high-pressure mist chamber 3 and a fixing means 5 for sealing the high-pressure mist chamber 3 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for slurrying powder, which is liable to be scattered as dust, in a closed pipe. The present invention also relates to a method for slurrying a powder having the property of self-hardening upon contact with water.

[0002]

2. Description of the Related Art Shotcrete to which various quick-setting agents have been added is used for shotcrete or mortar applied to a shoring work such as tunnel excavation work in order to harden early and obtain a support effect as an arch. Have been.

[0003] The above-mentioned sprayed concrete or mortar to which a quick-setting additive is added has been conventionally slurryed using a mixer. In a mixer, a powder material and water are mixed and stirred to form a slurry.

In a conventional method using a general mixer to form a powder such as a quick-setting agent into a slurry, that is, a suspension, it takes time to mix and stir the powder material and water. are doing. In addition, when a quick setting agent is added to the slurry, in the mixer or near the outlet of the conveying pipe,
Consolidation and coagulation of the slurry are likely to occur, which causes inconveniences such as blockage of the outlet of the transport pipe.

[0005]

In the above-mentioned method using a mixer, there is no continuity in the operation because of the quantitative supply system of the powder material and water. There are also problems such as danger due to rotation of the mixer blades and dust pollution due to the supply of powder material by workers. Further, each time the operation is completed, it is necessary to repeat the washing of the mixer, and there is a problem that a large amount of the alkaline suspension is generated.

The present invention has been made in consideration of such conventional problems, and can mix powder material and water in a short period of time, can continuously mix the powder material, and can quickly settle. It is an object of the present invention to provide a powder slurrying apparatus and a powder slurrying method which do not cause inconvenience such as clogging due to the addition of an agent.

[0007]

According to a first aspect of the present invention, there is provided a powder slurry forming apparatus comprising a compressed air inlet and a high-pressure water inlet, and a high-pressure mist generator for generating a high-pressure mist. A high-pressure mist chamber in which the high-pressure mist is introduced into the mist generating section, and the floating powder is supplied, and a plurality of high-pressure mist ejection holes penetrating in an oblique direction along the flowing direction of the floating powder are formed, A slurry pipe inserted into the high-pressure mist chamber and a slurry pipe detachably fixed to the high-pressure mist chamber such that the high-pressure mist ejection hole is located inside the high-pressure mist chamber, and And sealing means for hermetic sealing.

[0008] According to this powder slurrying apparatus, in the process of placing the powder in an air stream and carrying it in a floating manner, the mixed flow of water and air is fed into the flow path of the floating transport by atomizing high-pressure water. By mixing the water particles and the powder, the powder can be slurried, and the powder, which is easily scattered as dust, is processed in a closed pipeline, so that the working environment can be prevented from deteriorating. .

Further, since the mist-like water fine particles come into contact with the suspended powder, the mixing of the powder and water becomes finer, and a uniform slurry can be obtained.

[0010] In addition, in large-sized slurry-making equipment such as a mixer, it takes time to clean the work after the work is completed,
While a large amount of cleaning waste liquid is produced, the powder slurry of the present invention is used.
The slurring device can clean the slurry-slurried powder conveying pipe by stopping the supply of the suspended powder and performing only the high-pressure mist spraying with the high-pressure water and the high-pressure air for a short time.

According to a second aspect of the present invention, in the first aspect, the fixing means includes a stopper flange projecting from an outer surface of the slurry pipe and abutting against one outer surface of the high-pressure mist chamber; And a pressing plate having a flange that penetrates through the slurry pipe and abuts on the other outer surface of the high-pressure mist chamber. This facilitates disassembly and reassembly of the device.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the high-pressure mist ejection hole is provided with a high-pressure mist slurry.
The suspended powder is penetrated through the slurry pipe at an angle at which the suspended powder is jet-sucked by jetting to the pipe. Such a high-pressure mist ejection hole can exert a jet suction effect on the flow path of the floating conveyance of the powder. For this reason, the powder is smoothly transported through the floating transport channel, the supplied powder is maintained at a constant amount, the quality of the slurry is homogenized, and the transport channel can be lengthened. it can.

A fourth aspect of the present invention is the invention according to any one of the first to third aspects, wherein the slurry pipe is provided with a connecting screw of a floating powder conveying pipe located on the side of supplying the floating powder. And a connecting screw for connecting a transfer pipe for transferring the slurry-form powder positioned on the discharge side of the suspended powder. By these connecting screws, the floating powder conveying pipe and the conveying pipe for conveying the slurry-shaped powder are connected near any place where the slurryed powder is required to be sprayed or poured. be able to.

According to a fifth aspect of the present invention, compressed air and high-pressure water are mixed to form a high-pressure mist, and the high-pressure mist is jetted from a diagonal direction along the flowing direction of the floating powder and mixed with the floating powder. And a slurry.

According to the present invention, by supplying the suspended powder, the high-pressure water, and the high-pressure air, it is possible to continuously supply a large amount of slurry powder. For this reason, it is not necessary to prepare large-scale slurrying equipment such as a mixer for all applications that require a large amount of powdered slurry continuously, and economical effects such as capital investment and equipment installation are not required. Have.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described.
This will be specifically described with reference to FIGS. FIG. 1 is a side view of a powder slurry forming apparatus according to the present invention. FIG. 2 is an exploded side view of FIG. 1, (a) is a side view of a slurry pipe,
(B) is a side view of the high-pressure mist generating section and the high-pressure mist chamber, and (c) is a side view of a holding plate of the fixing means. FIG. 3 is a schematic diagram of an embodiment applied to a concrete spraying system.

A powder slurrying apparatus 1 according to the embodiment shown in FIG. 1 has a compressed air inlet 2a and a high pressure water inlet 2b, and generates a high pressure mist. A high-pressure mist chamber 3 communicating with the section 2 and introducing the high-pressure mist;
A plurality of high-pressure mist ejection holes 41 penetrating in a diagonal direction along the flow direction of the floating powder S are formed while the floating powder S is supplied, and a slurry pipe 4 inserted into the high-pressure mist chamber 3 is formed.
And a fixing means 5 for detachably fixing the slurry pipe 4 to the high-pressure mist chamber 3 so that the high-pressure mist ejection hole 41 is located inside the high-pressure mist chamber 3 and for sealing the high-pressure mist chamber 3. And

The fixing means 5 includes the slurry pipe 4
A stopper flange 5a protruding from the outer surface of the high-pressure mist chamber 3 and abutting against one outer surface of the high-pressure mist chamber 3; And a plate 5b. This facilitates disassembly and reassembly of the device.

As shown in FIG. 2A, the high pressure mist ejection hole 41 of the slurry pipe 4 penetrates at an angle of 45 degrees or less in the flowing direction of the suspended powder. As described above, since the high-pressure mist ejection hole 41 is opened toward the downstream, a jet suction effect can be exerted on the flow path of the floating conveyance of the powder. Therefore, the floating powder S is smoothly transported through the floating transport channel, and the quality is homogenized.
The workability can be improved because the transfer channel can be lengthened.

The slurry pipe 4 has a connecting screw 6 for a floating powder conveying pipe located on the supply side of the floating powder S, and has a slurry shape located on the discharge side of the floating powder S. And a connecting screw 7 for connecting a transfer pipe for transferring the powder S. These connecting screws 6 and 7 can connect the floating powder conveying pipe and the conveying pipe near any place where the slurry S is sprayed or required to be poured.

FIG. 2B shows a high-pressure mist generator 2 and a high-pressure mist chamber 3 communicating with the high-pressure mist generator 2 and introducing high-pressure mist. The high-pressure mist chamber 3 is provided on one outer surface with a packing 31 for sealing with the stopper flange 5a with which it comes into contact, and on the other outer surface with a packing 31 for sealing with the pressing plate 5b with which it comes into contact. The high pressure mist chamber 3 and the slurry pipe 4 are hermetically sealed by 5a and 5b.

The arrow S in FIG. 2A indicates a suspended powder which is supplied by being suspended and conveyed, and the arrow K indicates a powder which has been mixed with high-pressure atomized water and slurried. Also, arrow H
Indicates the path of the high-pressure mist ejected from the high-pressure mist chamber 3 through the high-pressure mist ejection hole 41 to the flow path of the suspended powder. The powder and the water fine particles come into contact at a location in the pipeline where the path S of the suspended powder and the path H of the high-pressure mist intersect, and a uniform slurry is continuously formed and a slurry having fluidity is formed. The powder K is sent to the discharge side.

At this time, since the path H of the high-pressure mist is ejected at an angle of 45 degrees or less in the direction of the path S of the floating powder, the floating powder is discharged to the discharge side of the slurry K. Aspirate. For this reason, the powder is smoothly transported through the floating transport channel, and the supplied powder is maintained at a constant amount.
In addition to the homogenization of the quality, the workability can be improved because the transport flow path can be lengthened.

FIG. 3 is a side view showing an example in which the powder slurrying apparatus 1 of the present invention is applied to a concrete spraying system for concrete lining as a primary lining on a ground surface which is an inner wall surface of a mountain tunnel. is there. In this embodiment, a quick-setting agent for accelerating the solidification of concrete is converted into a slurry in the powder slurrying apparatus 1 and mixed with the kneaded concrete.

The powder slurrying apparatus 1 shown in FIG. 3 has a floating powder conveying pipe 8 to which a quick-setting agent is supplied as floating powder.
, A compressed air pipe 10 and a high-pressure water pipe 9 are connected, and a slurry transport pipe 20 to which a slurry quick-setting agent is delivered is connected.

The floating powder conveying pipe 8 communicates with a storage tank 12 for storing a quick-setting agent for powder,
Powder supply device 11 that takes in compressed air from air compressor 16 and supplies the quick-setting agent as floating powder
Connected to a powder slurry continuously
To the gasifier 1.

The compressed air pipe 10 is connected to an air compressor 16 to supply high-pressure air to a compressed air inlet 2a of the high-pressure mist generator 2 of the powder slurrying device 1, and the high-pressure water pipe 9 is connected to a water pipe. The high-pressure mist generation unit 2 generates high-pressure mist by supplying high-pressure water to the high-pressure water intake port 2 b of the high-pressure mist generation unit 2, which is connected to a pump 14 connected to the storage tank 13. The generated high-pressure mist is introduced into the high-pressure mist chamber 3, and is ejected from the high-pressure mist ejection hole 41 located inside the high-pressure mist chamber 3 into the flow path of the slurry pipe 4.

The high-pressure mist ejected into the flow path of the slurry pipe 4 is contact-mixed with the floating powder of the quick-setting agent supplied from the floating powder transport pipe 8 into the flow path of the slurry pipe 4 and is mixed with the slurry. And sent to the slurry transport pipe 20.

The slurry conveying pipe 20 is connected to a concrete mixing section 19, is mixed with concrete or mortar supplied from a concrete pump 17 by a kneading concrete conveying pipe 18, and is made into shotcrete containing a quick-setting agent. Shotcrete transport pipe 2
1 and is sprayed from the tip of the spray nozzle 22.

In this embodiment, the powder slurrying apparatus is applied to slurry of a powdery quick-setting agent.
The object of the powder is not limited to this, but can be widely applied to general powder slurrying. Further, the amount of water in the atomized high-pressure water supplied to the fluidized (floating) powder, the mixing ratio with the air, and the like can be appropriately selected depending on the properties of the target powder, the application, and the like. .

[0031]

According to the first aspect of the present invention, in the process of placing the powder on the air stream and carrying it in a floating manner, the mixed flow of water and air is
Into the flow path of the floating conveyance, introduced as atomized high-pressure water, and by mixing water particles and powder, the powder can be slurried, and powder that is easily scattered as dust in a closed pipeline. Since processing is performed, it is possible to prevent the working environment from deteriorating.
In addition, since it becomes contact between the mist-like water fine particles and the suspended powder,
Mixing of the powder and water is fined, and a homogeneous slurry can be obtained.

According to the second aspect of the present invention, the fixing means projects from the outer surface of the slurry pipe and a stopper flange abutting on one outer surface of the high-pressure mist chamber, and the slurry pipe penetrating the high-pressure mist chamber penetrates therethrough. Since it has a holding plate with a flange that abuts on the other outer surface of the fog chamber, it is easy to disassemble and reassemble the device, improving the efficiency of cleaning after use and the work setup for transport and assembly to the site I do.

According to the third aspect of the present invention, since the high-pressure mist orifice penetrates the slurry pipe at an angle at which the floating powder is jet-sucked, the high-pressure mist jetting hole is provided with respect to the flow path of the floating conveyance of the powder. To exert a jet suction effect. For this reason, the powder is smoothly transported through the floating transport channel, the supplied powder is maintained at a constant amount, the quality of the slurry is homogenized, and the transport channel can be lengthened. it can.

According to the fourth aspect of the present invention, the slurry pipe is provided with a connecting screw for the floating powder conveying pipe located on the supply side of the floating powder, and the slurry is located on the discharge side of the floating powder. Because it has a connecting screw that connects the transfer pipe that transfers the powder in the form of a powder, the pipe for transferring the floating powder near any place where the slurry powder is sprayed or poured is required And a conveying pipe for conveying the slurry-shaped powder can be connected.

According to the fifth aspect of the present invention, a large amount of powdered slurry can be continuously supplied, and there is no need to prepare a large-sized slurrying equipment such as a mixer. It has an economic effect that does not require the cost of installing equipment.

[Brief description of the drawings]

FIG. 1 is a side view of a powder slurrying apparatus according to an embodiment of the present invention.

FIG. 2 is an exploded cross-sectional view of FIG. 1, wherein (a) is a cross-sectional view of a slurry pipe, (b) is a cross-sectional view of a high-pressure mist generator and a high-pressure mist chamber, and (c) is a holding plate of a fixing means. It is sectional drawing.

FIG. 3 is a side view of an embodiment applied to a concrete spraying system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 powder slurrying device 2 high-pressure mist generator 2a compressed air inlet 2b high-pressure water inlet 3 high-pressure mist chamber 4 slurry pipe 5 fixing means 5a stopper flange 5b holding plate 6 connecting screw 7 connecting screw 8 floating powder conveyance Pipe 9 High-pressure water pipe 10 Compressed air pipe 11 Powder pumping device 12 Storage tank 13 Water storage tank 14 Pump 16 Air compressor 17 Concrete pump 18 Kneading concrete conveying pipe 19 Concrete mixing section 20 Slurry conveying pipe 21 Blowing concrete conveying pipe 22 Injection nozzle

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Keisuke Iwaki 2nd Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. F-term (reference) 2E172 DC02 DC06 4G035 AB44 AC19

Claims (5)

[Claims] A high-pressure mist generating section having a compressed air inlet and a high-pressure water inlet for generating high-pressure mist; a high-pressure mist chamber communicating with the high-pressure mist generating section and introducing the high-pressure mist; While the body is supplied, a plurality of high-pressure mist ejection holes penetrating in an oblique direction along the flow direction of the floating powder are formed, and a slurry pipe inserted into the high-pressure mist chamber, and the high-pressure mist ejection holes are A slurry pipe detachably fixed to the high-pressure mist chamber so as to be positioned inside the high-pressure mist chamber, and fixing means for sealing the high-pressure mist chamber; . 2. The fixing means includes a stopper flange protruding from an outer surface of the slurry pipe and abutting against one outer surface of the high-pressure mist chamber, and a slurry pipe passing through the high-pressure mist chamber penetrating therethrough. 2. A powder slurrying apparatus according to claim 1, further comprising a pressing plate having a flange abutting on an outer surface. 3. The high-pressure mist ejection hole is provided with a high-pressure mist slurry.
3. A powder slurrying apparatus according to claim 1 or 2, wherein said suspended powder is penetrated through said slurry pipe at an angle at which said suspended powder is jet-suctioned by jetting to said pipe. 4. The slurry pipe is provided with a connection screw for a floating powder conveying pipe located on a supply side of the floating powder, and a slurry-like powder located on a discharge side of the floating powder. 4. A powder slurry forming apparatus according to claim 1, further comprising a connecting screw for connecting a transfer pipe for transferring the powder. 5. A pressurized air and high-pressure water are mixed to form a high-pressure mist, and the high-pressure mist is mixed with the floating powder by jet suction from an oblique direction along the flow direction of the floating powder, and is made into a slurry. A method for forming a powder slurry, comprising: