JP2001058146A - Production plant for spraying material of bentonite mixed soil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily achieve simplification while preventing the generation of dust by automating the feed of bentonite in a spraying material production plant which conveys bentonite mixed soil made by mixing bentonite with sand and gravel, as a spraying material to a sprayer. SOLUTION: This plant is provided with a bentonite hopper 21 in addition to a sand hopper 6 and a gravel hopper 7. The sand hopper 6 and the gravel hopper 7 are connected to a forced kneading mixer 8 with a weighing device via a belt conveyer 1 and the bentonite hopper 21 is connected to the forced kneading mixer 8 via a vertical belt conveyer 22 so that each material can be fed to the kneading mixer 8. Furthermore, the forced kneading mixer 8 is connected to a sprayer 10 via a belt conveyer 2 so that the materials can be conveyed to the sprayer 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant for producing a spray material from bentonite mixed soil.

[0002]

2. Description of the Related Art Bentonite-mixed soil is used, for example, in artificial land such as waste disposal sites and artificial ponds such as ponds, under artificial water-impervious layers such as clayey layers, road slopes, and slopes on mountain slopes. Used for construction of water-impervious layers such as walls of tunnels and tunnels.

[0003] At the waste disposal site, if the waste is landfilled as it is, harmful substances such as heavy metals such as lead, nickel and cadmium contained in the waste and organic chlorinated solvents such as trichloroethylene are contained. However, there is a concern that the water may diffuse into the soil with rainwater and cause environmental destruction.Therefore, a method of preventing water leakage by laying a waterproof sheet such as synthetic rubber has been adopted. Forms a water-impervious layer with bentonite-mixed soil mixed with

[0004] The water-blocking layer having such a multilayer structure has a water-blocking sheet made of synthetic rubber or the like and a water-blocking material made of bentonite and is made of a water-blocking material having completely different materials. The possibility that the impermeable layer is simultaneously damaged is extremely reduced, and a safer and more reliable impermeable layer can be formed.

[0005] In particular, since a water-impervious layer containing clay such as bentonite is arranged on the base portion, it can be used as a base of the water-impervious sheet and can be a stable ground without uneven settlement. Can be used as soil in which clay such as bentonite is mixed, so that the amount of remaining soil disposal can be reduced, so that it is economical and environmental burden can be reduced.

[0006] Montmorillonite contained in bentonite is swelled when it comes into contact with water to stop water. Therefore, in terms of quality, even if it is repeatedly subjected to the dry and wet action due to the fluctuation of the water level, the swelling action is repeated each time and the stability is maintained for a long time, and it is possible to follow the deformation due to uneven settlement of the ground.

[0007] In the construction of the impermeable layer using the bentonite-mixed soil, the excavator is excavated in a predetermined shape, and in a flat portion, the bentonite is scattered and spread to a uniform thickness. And a mixture of bentonite and
Performs irregular shaping and rolls to form a water barrier layer (so-called tamping method), but spraying, stirrers, spreaders and other heavy equipment cannot be installed on the slopes, so the main method is spraying. Become.

[0008] There are a dry type and a wet type in the construction by spraying, and a spraying material using bentonite mixed soil has been conventionally produced in a plant as shown in FIG.

In the figure, reference numeral 6 denotes a sand hopper and 7 denotes a billihopper, which are connected to a forced kneading mixer 8 with a measuring device and a belt conveyor 1 for conveyance, and a forced kneading mixer 8 with a measuring device is a spraying machine. 10 (dry or wet type) is communicated with the belt conveyor 2 for conveyance. In the figure, 12 is a compressor, 18 is a water tank, 19 is a generator, and 20 is a distribution board.

The sand 4 and the billet 5 (cobble of about 5 mm in diameter) are stored in a sand hopper 6 and a billihopper 7, respectively, by a tire shovel 17 and the like. It is put into the forced kneading mixer 8.

As shown in FIGS. 8 and 9, this forced kneading mixer 8 equipped with a measuring device is provided with stirring blades 8b at appropriate intervals in a horizontal drum type main body 8a having an upper surface opening and a leg on the lower side. The provided stirring shaft 8c was horizontally supported, and a driving motor 8d was connected to an end of the stirring shaft 8c.

The forced kneading mixer 8 equipped with a measuring device is also charged with bentonite 9 packed in a bag, stirred and sent to a spraying machine 10 (dry or wet type). The spray hose 11 is conveyed together with the compressed air, and is discharged and sprayed from the spray nozzle 13 at the tip.

In the case of a dry type, water is added after or at the spray nozzle 13 from the spray nozzle 13, and in the case of a wet type, before water is conveyed by a spray hose 11, for example, a forced kneading mixer with a measuring device Add at 8.

[0014]

As described above, conventionally, the bentonite 9 is also charged, in which case the bag for packing is broken,
It is to be put into the forced kneading mixer 8 with a measuring device by human power, and it requires labor and time.
It was up to the experience based on the quantity per piece. Moreover,
When the bag is opened and put, bentonite becomes dust, which may be bad for the environment.

An object of the present invention is to provide a plant for producing a spraying material from bentonite-mixed soil which can solve the disadvantages of the prior art described above, automate the introduction of bentonite, and can simplify and prevent the generation of dust. Is to do.

[0016]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention firstly prepares a spraying material for transporting a bentonite mixed soil obtained by mixing sand, billet and bentonite to a spraying machine as a spraying material. In the plant, sand hopper,
In addition to the beli hopper, a bentonite hopper is provided, and the sand kneader and the billi hopper are connected to a forced kneading mixer with a measuring device via a belt conveyor, and the bentonite hopper is connected via a vertical belt conveyor so that the material can be charged,
The gist of the forced kneading mixer with a measuring device is that the material is connected to the spraying machine via a belt conveyor so that the material can be conveyed.

Secondly, in a plant for producing a spraying material in which sand and a mixed bentonite mixed with bentonite are conveyed to a spraying machine as a spraying material, a sand hopper and a billihopper are screw-mixed with a hopper and a belt. Material is connected via a conveyor so that it can be charged,
The gist of the invention is that a bentonite hopper is also provided in the hopper of the screw mixer, and the screw mixer is connected to a spraying machine via a belt conveyor so that the material can be conveyed.

Third, in a plant for producing a sprayed material for transporting a bentonite mixed soil obtained by mixing sand, billet and bentonite to a spraying machine, a bentonite hopper is provided in addition to the sand hopper and the billihopper.
The sand kneader and billi hopper are connected via a belt conveyor, the bentonite hopper is connected via a vertical belt conveyor so that the materials can be put into the forced kneading mixer with a measuring device, and the forced kneading mixer with a measuring device is connected via a belt conveyor. The gist of the invention is that a material is conveyably connected to a truck mixer, and a hopper and a belt conveyor for receiving the material from the truck mixer are connected to a spraying machine.

Fourth, the gist of the present invention is to install a sand and a whirlpool or a device for adding water to sand or a whirlpool before the introduction of a forced kneading mixer with a measuring device or a screw mixer with a hopper.

According to the present invention, the bentonite hopper is provided in addition to the sand hopper and the billihopper, so that bentonite is stored in the bentonite hopper in advance, and a forced kneading mixer with a measuring device is conventionally used. Similarly, sand and bills are conveyed and fed from a sand hopper and a billi hopper by a belt conveyor, and bentonite is fed from a bentonite hopper via a vertical belt conveyor. In this way, bentonite is also charged by a conveyor, and there is no manual input.

As in the conventional case, in a forced kneading mixer equipped with a measuring device, sand, billet and bentonite are stirred and kneaded at a required ratio, and are sent to a spraying machine. In the spraying machine, the mixed material is sprayed together with compressed air from a compressor. The hose is transported and discharged from the spray nozzle at the tip and sprayed.

According to the second aspect of the present invention, a screw mixer equipped with a hopper is used, and the hopper is also provided with a bentonite hopper. Store the sand, sand, and bentonite in the required ratio with a screw mixer to stir and knead the mixture, and send it to the spraying machine.The spraying machine conveys the mixed material together with the compressed air from the compressor and blows the sprayed hose. It discharges from the attachment nozzle and sprays.

According to the third aspect of the present invention, similarly to the operation of the first aspect, a bentonite hopper is provided in addition to the sand hopper and the billihopper, and the bentonite is stored in the bentonite hopper in advance and the measuring device is used. As in the conventional case, sand and bills are conveyed and fed from a sand hopper and a billi hopper to a forced kneading mixer with a belt conveyor, and bentonite is fed from a bentonite hopper via a vertical belt conveyor. In this way, bentonite is also charged by a conveyor, and there is no manual input.

In the forced kneading mixer with a measuring device, the sand, the glue and the bentonite are agitated and kneaded at a required ratio in the same manner as in the above-mentioned claim 1, but the forced kneading mixer with the measuring device is used. From the truck mixer, transported by the truck mixer, received from the truck mixer to the hopper, and sent to the spraying machine via the belt conveyor, where the mixed material together with the compressed air from the compressor The spray hose is conveyed and discharged from the spray nozzle at the tip to spray.

According to the present invention, in addition to the above-mentioned action, the water is supplied to the sand mixing and sanding or sand mixing step before the introduction of the forced kneading mixer with the measuring device or the screw mixer with the hopper. Alternatively, kneading with a forced kneading mixer equipped with a measuring device or a screw mixer equipped with a hopper is carried out with the water added in advance. As a result, generation of bentonite dust can be reduced.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view showing a first embodiment of a plant for producing a sprayed material using bentonite mixed soil according to the present invention, in which the same components as those in FIG. 7 showing the conventional example are denoted by the same reference numerals.

That is, in the figure, reference numeral 8 denotes a forced kneading mixer with a weighing device, and the sand hopper 6 and the billihopper 7 are connected to the forced kneading mixer 8 with a weighing device via the belt conveyor 1 for conveyance. Further, a distribution board 20 to which a water tank 18 and a generator 19 are connected is connected to the forced kneading mixer 8 with a measuring device.

In the present invention, a bentonite hopper 21 is provided in addition to the sand hopper 6 and the billi hopper 7. And
The bentonite hopper 21 is installed close to the forced kneading mixer 8 equipped with a measuring device, and is connected to the forced kneading mixer 8 via a vertical belt conveyor 22 so that the material can be charged.

Although illustration of the details of the vertical belt conveyor 22 is omitted, as an example, it is called a bucket elevator, a housing is assembled from an iron plate and a shape steel, a driving device is provided at the top, and a tensioning device is provided at the bottom. A conveyor in which small buckets are hung on a belt at appropriate intervals is stretched. A platform and a discharge shoe are attached to the top.

The forced kneading mixer 8 with a measuring device is the same as the conventional example described above with reference to FIGS. 8 and 9. The forced kneading mixer 8 with a measuring device is provided with a spraying machine 10 (dry or wet type). The point of communication by the conveyor belt conveyor 2 is the same as that of the conventional example.

Thus, the sand 4 and the sand 5 (φ5 mm
Are stored in a sand hopper 6 and a sand hopper 7, respectively, by a tire shovel 17, and the like, and the sand 4 and the sand 5 are conveyed by the belt conveyor 1 and put into a forced kneading mixer 8 with a measuring device.

The bentonite 9 is stored in the bentonite hopper 21 in advance, and the bentonite 9 is charged from the bentonite hopper 21 via the vertical belt conveyor 22 together with the sand 4 and the billet 5. In this way, the bentonite 9 is also charged by the vertical belt conveyor 22,
There is no human input.

The mixed material from the forced kneading mixer 8 equipped with a measuring device is sent to the spraying machine 10 (dry or wet type) by the conveyor belt 2 for conveyance, and the mixed material is blown with the compressed air from the compressor 12 in the spraying machine 10. The conveying hose 11 is conveyed, and is discharged and sprayed from a spray nozzle 13 at the tip.

FIG. 2 shows a second embodiment of the present invention. In place of the forced kneading mixer 8 with a weighing device of the first embodiment, a screw mixer 23 with a hopper is used.
It was used.

As shown in FIGS. 4 to 6, the screw type mixer 23 is composed of a frame portion 26 and a sheet portion 27, and has a substantially tubular horizontal shape as a whole. A hopper 29 connected to the input ports 28a and 28b is provided, and a casing 24 serving as a material discharge port 30 while the other end is open is provided. An output shaft 25a is provided in the longitudinal direction of the casing 24. It has a drive motor 25.

A rotating shaft 31 extending in the longitudinal direction inside the casing 24 is installed substantially horizontally and connected to the tip of the output shaft 25a. The rotating shaft 31 is connected to a material input port 28a to which the hopper 29 is connected. , 28b and the material outlet 30.

Further, spiral blades 32, 33 and the like are fixed to the rotating shaft 31. When the rotating shaft 31 is driven, the material fed through the hopper 29 is discharged.
Transferred in 30 directions. The spiral pitch of the first spiral blade 32 is set to a relatively small value between the end of the rotating shaft 31 on the drive motor 25 side and the first material inlet 28a.

The inside of the hopper 29 is divided into a plurality of partitions by partitions, and a first hopper 29a and a second hopper 29b are formed therein, and the first hopper 29a is a bentonite hopper. The second hopper 29b is a sediment hopper that receives the sand 4 and the sand 5. The discharge port of each of these hoppers 29a, 29b is located immediately near the outer periphery of the spiral blade installed on the rotary shaft 31, and serves as a material input port to the screw mixer 23.

Hereinafter, the one formed by the discharge port of the first hopper 29a is called a first material input port 28a, and the one formed by the second hopper 29b is the second material input port 28b. I mean. Therefore,
The materials in the first and second hoppers 29a and 29b are supplied to the screw mixer 23 through the material inlets 28a and 28b, respectively.

Further, spiral blades 32, 33 and the like are fixed to the rotating shaft 31, and when the rotating shaft 31 is driven, the material input through the hopper 29 is discharged.
Transferred in 30 directions. The first spiral blade 32 has a spiral pitch set to a relatively small value (first pitch) from the end of the rotating shaft 31 on the drive motor 25 side to the first material input port 28a. I have.

The question of the downstream edge of the first material input port 28a and the second material input port 28b is as follows.
A peripheral wall portion having a small width is formed at a lower end portion of the partition wall facing the outer peripheral portion of the partition wall.

The first spiral blade 32 gradually expands its spiral pitch (first pitch) at a position directly below this peripheral wall, and the downstream edge of the peripheral wall, that is, the second spiral blade 32,
At a position immediately below the upstream edge of the material input port 28b, the first spiral blade 32 is formed with a bending point N, and the spiral pitch thereafter is larger than the above-mentioned pitch (the second spiral blade 32).
Pitch).

This is an adjustment for connecting one end of the second spiral blade 33 to the downstream side surface of the first spiral blade 32 at a position immediately below the peripheral wall portion, and thereafter shifting to a required pitch state. This is because it is an area. The second spiral blades 33 are arranged at such a pitch that they are continuous from a position immediately below the peripheral wall portion to a downstream side of the second material inlet 28b.

That is, the second spiral wing 33 is interposed between the first spiral wings 32 in the second pitch in the form of a double thread,
Two helical spaces defined by the second helical wings 33 are formed between the pitches of the first helical wings 32, and the material from the first material input port 28a is filled in one of these spaces. Since the material is guided and transferred, and the other is left directly below the second material input port 28b in the space, the material from the second material input port 28b is supplied into the other spiral space. Can be.

In this case, the amount of the material that can be supplied from the second material input port 28b is changed from the transfer amount in the case of the second pitch to the transfer amount in the first pitch (the first material input port 28b).
a), and the first pitch and the second pitch are constant for each rotation shaft 31.
A certain amount of material can be measured and transferred from each of the material input port 28a and the second material input port 28b.

This means that, on the contrary, the second pitch is the second material input port 28b for the material transferred at the first pitch.
It should be set in accordance with the supply amount of the material from.

The sand hopper 6 and the billi hopper 7 are connected to the screw mixer 23 via the belt conveyor 1 so that the material can be charged therein, and the screw mixer 23 can be conveyed to the spraying machine 10 via the belt conveyor 2. Connected.

According to the present embodiment, a bentonite hopper is also provided in the hopper of the screw-type mixer 23 with a hopper. Sand 4, sand 5 and bentonite 9 are agitated and kneaded at a required ratio by a mixer 23 and sent to a spraying machine 10,
The spraying machine 10 conveys the mixed material together with the compressed air from the compressor 12 through the spraying hose 11 and discharges and blows out from the spraying nozzle 13 at the tip.

FIG. 3 shows a third embodiment of the present invention. As a modification of the first embodiment, a forced kneading mixer 8 with a weighing device can transport materials to a truck mixer 34 via the belt conveyor 2. And spraying machine 10
The hopper 35 for receiving the material from the truck mixer 34 and the belt conveyor 3 are connected to the hopper. The hopper 35 is integrally connected to the leading end of the belt conveyor 3.

The sand 4 and the bill 5 (cobble of about φ5 mm) are stored in the sand hopper 6 and the bill hopper 7 by a tire shovel 17 and the like, and the sand 4 and the bill 5 are conveyed from the belt and the belt conveyor 1 and provided with a measuring device. The bentonite 9 is charged into the forced kneading mixer 8, the bentonite 9 is stored in the bentonite hopper 21 in advance, and the bentonite 9 is charged from the bentonite hopper 21 via the vertical belt conveyor 22 along with the sand 4 and the billet 5. As described above, the bentonite 9 is also charged by the vertical belt conveyor 22, and is not manually charged.

The mixed material from the forced kneading mixer 8 equipped with a measuring device is transported by the conveyor belt conveyor 2 to a truck mixer.
It is then sent to a location where the spray mixer 10 (dry or wet) is located at a remote location by a truck mixer 34.

The mixed material fed from the truck mixer 34 to the hopper 35 is supplied to the spraying machine 10 by the conveyor belt 3 for conveyance.
In the spraying machine 10, the mixed material is transported together with the compressed air from the compressor 12 through the spraying hose 11, and is discharged and sprayed from the spraying nozzle 13 at the tip.

In each of the first to third embodiments, although not shown, the sand 4 and the sand 5 or the sand 5 or the sand 5 before the charging of the forced kneading mixer 8 with a measuring device or the screw mixer 23 with a hopper. 4 or 5
You may make it install a hydration apparatus.

This watering device may be the same as the water tank 18, and for example, watering may be considered at a place where the sand 4 or the bill 5 is on the conveyor belt 1 for conveyance. Further, water may be sprayed on the sand hopper 6 and the billi hopper 7.

By installing such a water adding device, the water tank 18 for the forced kneading mixer 8 with a measuring device or the screw mixer 23 with a hopper may be omitted.

[0056]

As described above, the plant for producing a spraying material using bentonite-mixed soil according to the present invention can be simplified easily by preventing the generation of dust by automating the introduction of bentonite.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a first embodiment of a plant for producing a sprayed material using bentonite mixed soil according to the present invention.

FIG. 2 is an explanatory view showing a second embodiment of a plant for producing a sprayed material using bentonite mixed soil according to the present invention.

FIG. 3 is an explanatory view showing a third embodiment of a plant for producing a sprayed material using bentonite mixed soil according to the present invention.

FIG. 4 is a vertical sectional side view showing an example of a screw mixer.

FIG. 5 is a plan view showing an example of a screw mixer.

FIG. 6 is a vertical sectional side view showing a use state of the screw mixer.

FIG. 7 is an explanatory diagram showing a conventional example.

FIG. 8 is a front view showing an example of a forced kneading mixer with a measuring device.

FIG. 9 is a vertical sectional side view showing an example of a forced kneading mixer with a measuring device.

[Explanation of symbols]

1-3: Belt conveyor 4 ... Sand 5 ... Billi 6 ... Sand hopper 8 ... Billi hopper 8 ... Forced kneading mixer with measuring device 8a ... Body 8b ... Stirring blade 8c ... Stirring shaft 8d ... Motor 9 ... Bentonite 10 ... Spraying machine 11 ... Blowing hose 12 ... Compressor 13 ... Blowing nozzle 15 ... Water tank 16 ... Water pump 17 ... Tire excavator 18 ... Water tank 19 ... Generator 20 ... Distribution board 21 ... Benton hopper 22 ... Vertical belt conveyor 23 ... Screw mixer 24 ... casing 25 ... drive motor 25a ... output shaft 26 ... frame part 27 ... sheet part 28a ... first material input port 28b ... second material input port 29 ... hopper 29a ... first hopper 29b ... second hopper 30… Material outlet 31… Rotary shaft 32, 33… Helix blade 34… Truck mixer 35… Hopper

Continuing from the front page (72) Inventor Naoki Horie 8-14-14 Ginza, Chuo-ku, Tokyo Nippon Special Construction Co., Ltd. (72) Takayuki Iizuka 8-14-14 Ginza, Chuo-ku, Tokyo Nippon Special Construction F term (reference) 2D018 DA00 4D004 AA32 AC07 BA02 BB06 CA45 CC13 4F033 QA10 QB04 QB20 QD02 QD06 QD11 QE03 QE21 QF07Y QH10

Claims (4)

[Claims] Claims 1. A plant for producing a sprayed material in which a bentonite mixed soil obtained by mixing sand and billet and bentonite is conveyed to a spraying machine as a spraying material, a bentonite hopper is provided in addition to a sand hopper and a billihopper, and a measuring instrument is provided. The sand hopper and the billi hopper are connected via a belt conveyor, the bentonite hopper is connected via a vertical belt conveyor so that the materials can be charged, and the forced kneading mixer with a weighing machine is sprayed via a belt conveyor. A plant for producing a spraying material using bentonite-mixed soil, wherein the material is connected so that the material can be transported. 2. A plant for producing a spraying material for transporting a bentonite mixed soil obtained by mixing sand, billiard and bentonite to a spraying machine as a spraying material, wherein a sand hopper, a billihopper and a screw type mixer with a hopper and a belt conveyor are provided. A bentonite hopper is also provided in the hopper of the screw mixer, and the screw mixer is connected to the spraying machine via a belt conveyor so that the material can be conveyed. A plant for producing sprayed material from mixed soil. 3. A plant for producing a sprayed material for transporting a bentonite mixed soil obtained by mixing sand, billy and bentonite to a spraying machine as a spraying material, wherein a bentonite hopper is provided in addition to a sand hopper and a billihopper, and a measuring device is provided. The sand hopper and the billi hopper are connected via a belt conveyor, the bentonite hopper is connected via a vertical belt conveyor so that the materials can be charged, and the forced kneading mixer with a measuring device is connected via a belt conveyor to a truck mixer. A plant for producing a spray material using bentonite mixed soil, wherein the material is conveyably connected, and a hopper and a belt conveyor for receiving the material from the truck mixer are connected to the spray machine. 4. The method according to claim 1, wherein a sand and a sand or a device for adding water to the sand or the sand are installed before the forced kneading mixer equipped with a measuring device or the screw mixer equipped with a hopper. A plant for producing a spray material using the bentonite mixed soil described in the above.