JP3749925B2 - Powder slurrying apparatus and powder slurrying method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for slurrying powder that is likely to be scattered as dust in a sealed pipe line. The present invention also relates to a slurry method for powder having the property of self-hardening by contact with water.
[0002]
[Prior art]
For shotcrete or mortar that is applied to support works such as tunnel excavation work, shotcrete containing various quick setting agents is used in order to obtain a support effect as an arch by early curing.
[0003]
The sprayed concrete or mortar to which the quick setting agent is added is conventionally made into a slurry using a mixer. In the mixer, the powder material and water are mixed and stirred to form a slurry.
[0004]
In the conventional method using a general mixer, a time is required for mixing and stirring the powder material and water in order to make a powder such as the quick setting agent into a slurry, that is, a suspension. . Further, when a quick setting agent is added to the slurry, the slurry is likely to consolidate and adhere in the mixer or in the vicinity of the outlet of the transport pipe, which causes problems such as blocking of the outlet of the transport pipe.
[0005]
[Problems to be solved by the invention]
Moreover, in the method using the above-mentioned mixer, there is no continuity in the work because of the quantitative supply system of the powder material and water. In addition, there are problems such as danger due to rotation of the mixer blades and dust pollution associated with the supply of powder material by workers. Further, it is necessary to repeat the washing of the mixer every time work is completed, and there is a disadvantage that a large amount of alkaline suspension is generated.
[0006]
The present invention has been made in consideration of the above-mentioned conventional problems, and the powder material and water can be mixed in a short time and can be continuously mixed. It is an object of the present invention to provide a powder slurrying apparatus and a powder slurrying method that do not cause inconvenience such as blockage due to the above.
[0007]
[Means for Solving the Problems]
For this reason, the powder slurrying apparatus of the invention of the present invention comprises a compressed air intake and a high-pressure water intake and generates a high-pressure mist, and the high-pressure mist communicates with the high-pressure mist generator. A high-pressure fog chamber to be introduced, and a slurry to which suspended powder is supplied and a plurality of high-pressure fog ejection holes penetrating in an oblique direction along the flow direction of the suspended powder are formed and inserted into the high-pressure fog chamber A pipe, and a fixing means for detachably fixing the slurry pipe to the high pressure fog chamber so that the high pressure fog spray hole is located inside the high pressure fog chamber, and for sealing the high pressure fog chamber,
The fixing means includes a stopper flange protruding from the outer surface of the slurry pipe and contacting one outer surface of the high-pressure fog chamber, and a flange penetrating a slurry pipe inserted through the high-pressure fog chamber and contacting the other outer surface of the high-pressure fog chamber A presser plate having
The one outer surface of the high-pressure fog chamber is provided with a stopper flange and a packing for sealing, and the other outer surface is provided with a pressing plate and a seal for sealing, and the high-pressure fog chamber and the slurry pipe are It is hermetically sealed.
[0008]
According to this powder slurrying apparatus, a mixed flow of water and air is introduced as mist-like high-pressure water into the flow path of the floating conveyance in the process of floating and conveying the powder on the air flow. By mixing the water fine particles and the powder, the powder can be made into a slurry, and the powder that easily scatters as dust is processed in the sealed pipe line, so that the working environment can be prevented from deteriorating.
[0009]
Further, since the mist-like water fine particles are brought into contact with the suspended powder, the mixing of the powder and water is refined, and a homogeneous slurry can be obtained.
[0010]
In addition, in large slurry equipment such as a mixer, it takes time for cleaning after the work is completed, and a large amount of cleaning waste liquid is produced. By stopping supply and performing only high-pressure mist spraying with high-pressure water and high-pressure air for a short period of time, the slurry powder transfer pipe can be cleaned.
[0012]
The high-pressure mist injection hole has an angle for jetting the suspended powder by jetting the high-pressure mist to the slurry pipe and penetrates the slurry pipe. Such a high-pressure mist ejection hole can exert a jet suction effect on the flow path for the floating conveyance of the powder. For this reason, the powder is smoothly conveyed through the floating conveyance channel, the supplied powder is maintained at a constant amount, the quality of the slurry is homogenized, and the conveyance channel can be lengthened, so that workability can be improved. it can.
[0013]
The slurry pipe is provided with a connecting screw for a floating powder conveyance pipe located on the supply side of the floating powder, and conveys the powder in a slurry shape located on the discharge side of the floating powder. A connection screw for connecting the transport pipe is provided. With these connecting screws, slurry powder is sprayed or the floating powder transport pipe and the transport pipe for transporting the powder in the form of slurry are connected in the vicinity of any place where pouring is required. be able to.
[0014]
The powder slurrying method of the present invention includes a high-pressure mist generation unit that includes a compressed air intake and a high-pressure water intake and generates a high-pressure mist, and a high-pressure mist that is introduced into the high-pressure mist generation unit in communication with the high-pressure mist generation unit. A slurry pipe into which a high-pressure fog spray hole is formed, and a plurality of high-pressure spray holes are formed in the fog chamber and supplied with the suspended powder of the quick setting material and obliquely extending along the flow direction of the floating powder. And at least
Compressed air and high-pressure water are mixed in the high- pressure mist generating section to form a high-pressure mist, and the high-pressure mist is introduced into the communicating high-pressure mist chamber ,
The high-pressure mist is ejected in an oblique direction along the flow direction of the suspended powder from the high-pressure mist ejection hole formed in the slurry pipe, and the powder is sucked to the discharge side to be mixed with the suspended powder. -It is characterized by.
[0015]
In the present invention, a large amount of slurry powder can be continuously supplied by supplying floating powder, high-pressure water, and high-pressure air. For this reason, it is not necessary to prepare a large-scale slurrying facility such as a mixer for any application that requires a large amount of slurry powder continuously. Have.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be specifically described with reference to FIGS. 1 to 3. FIG. 1 is a side view of a powder slurrying apparatus of the present invention. 2 is an exploded side view of FIG. 1, (a) is a side view of a slurry pipe, (b) is a side view of a high-pressure mist generating section and a high-pressure mist chamber, and (c) is a side view of a holding plate of a fixing means. FIG. FIG. 3 is a schematic view of an embodiment applied to a concrete spraying system.
[0017]
A powder slurrying apparatus 1 according to the embodiment shown in FIG. 1 includes a compressed air intake 2a and a high-pressure water intake 2b, and generates a high-pressure mist. A high-pressure fog chamber 3 through which the high-pressure mist is introduced, and a suspended powder S are supplied, and a plurality of high-pressure mist ejection holes 41 penetrating in an oblique direction along the flow direction of the suspended powder S are formed, The slurry pipe 4 is detachably fixed to the high-pressure mist chamber 3 so that the slurry pipe 4 inserted into the high-pressure mist chamber 3 and the high-pressure mist ejection hole 41 are located inside the high-pressure mist chamber 3. And a fixing means 5 for sealing the high-pressure fog chamber 3.
[0018]
The fixing means 5 protrudes from the outer surface of the slurry pipe 4 through a stopper flange 5 a that contacts one outer surface of the high-pressure fog chamber 3 and a slurry pipe 4 inserted through the high-pressure fog chamber 3 passes through the fixing means 5. And a presser plate 5b having a flange in contact with the other outer surface. This facilitates disassembly and reassembly of the device.
[0019]
As shown in FIG. 2 (a), in the slurry pipe 4, the high-pressure mist ejection hole 41 penetrates at an angle of 45 degrees or less toward the flow direction of the suspended powder. As described above, since the high-pressure mist ejection hole 41 is opened toward the downstream, the jet suction effect can be exerted on the flow path for the floating conveyance of the powder. For this reason, the suspended powder S is smoothly transported through the floating transport flow path, and the workability can be improved since the transport flow path can be lengthened along with the homogenization of quality.
[0020]
Further, the slurry pipe 4 is provided with a connecting screw 6 for a suspended powder transport pipe located on the supply side of the suspended powder S, and is in the form of a slurry located on the discharge side of the suspended powder S. A connection screw 7 for connecting a transport pipe for transporting S is provided. By means of these connecting screws 6 and 7, the suspended powder transfer pipe and the transfer pipe can be connected near an arbitrary place where the slurryed powder S is sprayed or poured.
[0021]
FIG. 2 (b) shows the high-pressure fog generator 2 and the high-pressure fog chamber 3 that communicates with the high-pressure fog generator 2 and into which the high-pressure fog is introduced. One outer surface of the high-pressure mist chamber 3 is provided with a stopper flange 5a in contact with a packing 31 for sealing, and the other outer surface is provided with a packing 31 for sealing with a pressing plate 5b in contact with the fixing means. The high pressure fog chamber 3 and the slurry pipe 4 are sealed by 5a and 5b.
[0022]
An arrow S in FIG. 2A indicates a suspended powder supplied by being floated and conveyed, and an arrow K indicates a powder that has been mixed with high-pressure mist water to form a slurry. An arrow H indicates the course of the high-pressure mist that is 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 water fine particles come into contact with each other at a location in the pipe line where the path S of the suspended powder and the path H of the high-pressure mist intersect, and a homogeneous slurry is continuously formed. Powder K is sent to the discharge side.
[0023]
At this time, since the path H of the high-pressure mist is ejected at an angle of 45 degrees or less toward the direction in which the path S of the suspended powder advances, the suspended powder is sucked to the discharge side of the slurryed powder K. . For this reason, the powder is smoothly conveyed through the floating conveyance channel, the supplied powder is maintained at a constant amount, the quality of the slurry is homogenized, and the conveyance channel can be lengthened, so that workability can be improved. it can.
[0024]
FIG. 3 is a side view showing an example in which the powder slurrying device 1 of the present invention is applied to a concrete spraying system for lining concrete as a primary lining on a natural mountain surface that is an inner wall surface of a mountain tunnel. In this embodiment, the powder slurrying apparatus 1 is used to slurry a rapid setting agent that accelerates solidification of the concrete and mix it with the kneaded concrete.
[0025]
The powder slurrying apparatus 1 shown in FIG. 3 is connected to a floating powder conveying pipe 8 to which a quick setting agent is supplied as a floating powder, a compressed air pipe 10, and a high-pressure water pipe 9, and a slurry. A slurry-conveying pipe 20 through which the rapid setting agent is fed is connected.
[0026]
The floating powder conveying pipe 8 communicates with the storage tank 12 in which the powder quick setting agent is stored, and takes in the compressed air from the air compressor 16 to store the quick setting agent in the floating powder. The powder supply device 11 is connected to the powder slurry supply device 11 and the suspended powder of the rapid setting agent is continuously supplied to the powder slurry forming device 1.
[0027]
The compressed air pipe 10 is connected to an air compressor 16 to supply high pressure air to the compressed air inlet 2a of the high pressure mist generating unit 2 of the powder slurrying apparatus 1, and the high pressure water pipe 9 is connected to a water storage tank 13. The high-pressure water is supplied to the high-pressure water intake 2b of the high-pressure mist generator 2, and the high-pressure mist generator 2 generates high-pressure mist. The generated high-pressure mist is introduced into the high-pressure mist chamber 3 and 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.
[0028]
The high-pressure mist sprayed into the flow path of the slurry pipe 4 is brought into contact with and mixed with the suspended powder of the quick-setting agent supplied from the floating powder transport pipe 8 into the flow path of the slurry pipe 4 to form a slurry. To the slurry-conveying pipe 20.
[0029]
The slurry-carrying pipe 20 is connected to a concrete mixing unit 19 and mixed with concrete or mortar supplied from a concrete pump 17 through a kneaded concrete conveying pipe 18 to form shotcrete containing a rapid setting agent. It sprays from the front-end | tip of the injection nozzle 22 through the conveyance pipe 21. FIG.
[0030]
In this embodiment, the powder slurrying apparatus is applied to the slurrying of the powdery quick-setting agent. However, the object of the powder is not limited to this, and is widely used for general powders. Applicable in slurrying. Further, the moisture content of the mist-like high-pressure water supplied to the fluidized (floating) powder, the mixing ratio with air, and the like can be appropriately selected according to the nature and application of the target powder. .
[0031]
【The invention's effect】
According to the first aspect of the present invention, in the process of floating transporting powder on an air stream, a mixed flow of water and air is introduced into the floating transport flow path as mist-like high-pressure water, By mixing the fine particles and the powder, the powder can be made into a slurry, and the powder that is likely to be scattered as dust is processed in the sealed pipe line, so that the working environment can be prevented from deteriorating. Further, since the mist-like water fine particles are brought into contact with the suspended powder, the mixing of the powder and water is refined, and a homogeneous slurry can be obtained.
[0032]
Further, the fixing means protrudes from the outer surface of the slurry pipe and comes into contact with one outer surface of the high-pressure fog chamber, and the flange that passes through the slurry pipe inserted through the high-pressure fog chamber and contacts the other outer surface of the high-pressure fog chamber Therefore, the apparatus can be easily disassembled and reassembled, and the efficiency of the work setup for cleaning after use and transport assembly to the site is improved.
[0033]
According to the second aspect of the present invention, since the high-pressure mist ejection hole penetrates the slurry pipe with an angle at which the suspended powder is jet-suctioned, the jet suction is performed with respect to the flow path of the suspended powder transport. The effect can be demonstrated. For this reason, the powder is smoothly conveyed through the floating conveyance channel, the supplied powder is maintained at a constant amount, the quality of the slurry is homogenized, and the conveyance channel can be lengthened, so that workability can be improved. it can.
[0034]
According to a third aspect of the present invention, the slurry pipe is provided with a connection screw for the floating powder conveying pipe located on the supply side of the floating powder and is in a slurry shape located on the discharge side of the floating powder. Since it has a connecting screw for connecting the transfer pipe for transferring the powder, the suspended powder transfer pipe and the slurry near any place where the slurryed powder needs to be sprayed or poured. A transport pipe for transporting the shaped powder can be connected.
[0035]
According to the invention of claim 4 , a large amount of slurryed powder can be continuously supplied, and it is not necessary to prepare a large-scale slurrying facility such as a mixer, and equipment investment, facility installation, etc. It has an economic effect that does not cost much.
[Brief description of the drawings]
FIG. 1 is a side view of a powder slurrying apparatus according to an embodiment of the present invention.
2 is an exploded cross-sectional view of FIG. 1, in which (a) is a cross-sectional view of a slurry pipe, (b) is a cross-sectional view of a high-pressure mist generating section 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]
DESCRIPTION OF SYMBOLS 1 Powder slurry apparatus 2 High pressure fog generating part 2a Compressed air inlet 2b High pressure water inlet 3 High pressure fog chamber 4 Slurry pipe 5 Fixing means 5a Stopper flange 5b Holding plate 6 Connection screw 7 Connection 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 Kneaded concrete transport pipe 19 Concrete mixing section 20 Slurry transport pipe 21 Shotcrete transport pipe 22 Injection nozzle

Claims (4)

A high-pressure mist generating section that has a compressed air inlet and a high-pressure water intake and generates high-pressure mist, a high-pressure mist chamber that communicates with the high-pressure mist generating section and into which the high-pressure mist is introduced, and floating powder are supplied. And a plurality of high-pressure fog spray holes penetrating in an oblique direction along the flow direction of the suspended powder, and a slurry pipe inserted into the high-pressure fog chamber, and the high-pressure fog spray holes inside the high-pressure fog chamber A slurry pipe is detachably fixed to the high pressure fog chamber so as to be positioned at the same time, and a fixing means for sealing the high pressure fog chamber is provided.
The fixing means includes a stopper flange protruding from the outer surface of the slurry pipe and contacting one outer surface of the high-pressure fog chamber, and a flange penetrating a slurry pipe inserted through the high-pressure fog chamber and contacting the other outer surface of the high-pressure fog chamber A presser plate having
The one outer surface of the high-pressure fog chamber is provided with a stopper flange and a packing for sealing, and the other outer surface is provided with a pressing plate and a seal for sealing, and the high-pressure fog chamber and the slurry pipe are A powder slurrying apparatus characterized by being sealed.   2. The powder according to claim 1, wherein the high-pressure mist ejection hole has an angle at which the suspended powder is jet-sucked by ejection of the high-pressure mist to the slurry pipe, and penetrates the slurry pipe. A slurrying device.   The slurry pipe is provided with a connecting screw for a floating powder conveyance pipe located on the supply side of the floating powder, and a conveyance pipe for conveying the powder in the form of slurry located on the discharge side of the floating powder. 2. The powder slurrying apparatus according to claim 1, further comprising a connecting screw for connecting the two. A high-pressure mist generating section that includes a compressed air inlet and a high-pressure water intake to generate a high-pressure mist; a high-pressure mist chamber that communicates with the high-pressure mist generating section; Is provided with at least a slurry pipe formed with a plurality of high-pressure mist ejection holes penetrating in an oblique direction along the flow direction of the suspended powder and inserted into the high-pressure mist chamber,
Compressed air and high-pressure water are mixed in the high- pressure mist generating section to form a high-pressure mist, and the high-pressure mist is introduced into the communicating high-pressure mist chamber ,
The high-pressure mist is ejected in an oblique direction along the flow direction of the suspended powder from the high-pressure mist ejection hole formed in the slurry pipe, and the powder is sucked to the discharge side to be mixed with the suspended powder. -A powder slurrying method characterized by comprising:

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