JP2006316530A - Scattering device and scattering method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scattering device capable of uniformly and efficiently scattering granular particles, and a scattering method. <P>SOLUTION: The granular particles dropped to a belt conveyor 20 from a hopper 10 are mounted to a belt 30 and conveyed. A plurality of scrapers 40 etc., are arranged along the direction of conveyance at regular intervals, the granular particles on the belt 30 are scratched off by the scrapers 40 etc., to enter the receiving port 52 of a shooter 50, and they are scattered from an exhaust port of the shooter 50. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling-out apparatus and a rolling-out method for granular materials, and more particularly to a rolling-out apparatus and a rolling-out method for rolling granular materials conveyed by an infinite belt conveying device.

Construction work has been carried out for a long time to cover and improve soft soil such as sludge by applying sand and covering sand on the soft ground on the seabed. Recently, in order to restore the lost natural environment, construction work has been undertaken to create tidal flats by putting earth and sand into the seabed. There are various ways to do these works. A general method is a water transportation method in which sand and water are sucked up together with a pump, sent to the seabed with a pipe, and spread and spread by a sanding head such as a spray pipe or spraying device having a special structure. Other than that, there are a method of spreading sand from a ship using a belt conveyor, a dropping method using a combination of a hopper and a shooter (for example, see Patent Document 1). When using a belt conveyor, swing the belt conveyor from side to side and spread the sand like a fan.
JP 2000-136533 A

  However, in the water carrying method, it is extremely difficult to distribute the sand so that the sand is uniform over the entire surface of the opening portion of the sanding head, resulting in unevenness in the spreading thickness of the sanding sand. In the method of swinging the belt conveyor, the sanding is stopped once the swing is made and the ship is moved by moving the sand, and then the sanding is performed by the next swing. The work efficiency is poor and the cost is high. Moreover, since the part which does not grind | pulverize sand will arise if the part which grinded between sand is not overlapped between swings to some extent, the overlap part of grinded sand will increase, and sand will be wasted. Furthermore, the drop method using a combination of a hopper and a shooter has a problem in terms of safety and construction accuracy because the drop position has to be increased as the width becomes wider.

  This invention is made | formed in view of this point, The place made into the objective is to provide the brewing apparatus and the brewing method which grind | pulverize a granular material uniformly and efficiently.

  The first rolling-out device of the present invention is a rolling-out device for rolling granular material, a hopper for supplying granular material, an infinite belt conveying device for conveying the granular material supplied from the hopper, and the infinite A plurality of scrapers scraped off the granular material from the belt, and the plurality of scrapers are spaced apart from each other along the conveying direction of the granular material The larger the distance between the scraper and the hopper, the smaller the separation distance between the scraper and the band. With such a configuration, all the scrapers can surely scrape off the granular material, and the granular material is sprinkled out for each position of the scraper along the conveying direction.

  Here, the infinite belt conveying device refers to a belt conveyor, an apron feeder or the like.

  In a preferred embodiment, the plurality of scrapers are installed so as to scrape off the granular material on both sides of the band in the transport direction.

  In a preferred embodiment, the plurality of scrapers are installed so as to scrape off the granular material alternately on both sides of the band in the transport direction.

  A second rolling-out device of the present invention is a rolling-out device for rolling granular materials, a hopper for supplying granular materials, an infinite belt conveying device for conveying the granular materials supplied from the hopper, and the infinite A plurality of scrapers installed above the band of the band conveying device and scraping off the granular material from the band, the plurality of scrapers spaced apart from each other along the conveying direction of the granular material and the band Are alternately arranged on both sides of a bisector that bisects the width of the two, and on each side that is bisected by the bisector, the greater the distance between the scraper and the hopper, the greater the distance between the scraper and the strip. The separation distance becomes smaller. With such a configuration, all the scrapers can surely scrape off the granular material, and the granular material is sprinkled out for each position of the scraper along the conveying direction.

  A third rolling-out device of the present invention is a rolling-out device for rolling granular material, a hopper that supplies the granular material, an infinite belt conveying device that conveys the granular material supplied from the hopper, and the infinite A plurality of scrapers installed above the band of the band conveying device and scraping off the granular material from the band, the plurality of scrapers spaced apart from each other along the conveying direction of the granular material and the band Is installed on both sides of a bisector that bisects the width of the band, and extends from the side edge of the band toward the bisector, and on each side that is bisected by the bisector, the scraper and the hopper The larger the distance is, the smaller the separation distance between the tip of the scraper on the bisector side and the bisector is.

  A shooter is further provided at least below the infinite belt conveyance device, the shooter receiving the granular material scraped off from the belt, and a discharge port extending along the conveyance direction and discharging the granular material. It is preferable to provide.

  It is preferable that the apparatus further includes a moving device that moves at least the hopper, the infinite belt conveying device, and the scraper, and the moving direction of the moving device is a direction that is substantially orthogonal to the conveying direction of the particulate matter. The term “substantially orthogonal” as used herein includes orthogonality in a mathematically strict sense, and includes deviation from strictness in the strictest sense due to deviation caused by operation of the device and deviation in direction due to the moving environment. It means that

  In a preferred embodiment, the moving device is a ship.

  The rolling-out method of the present invention is a rolling-out method for rolling granular materials using a hopper and an infinite belt conveying device, the step of supplying granular materials from the hopper to the infinite belt conveying device, and the infinite belt conveying A conveying step of conveying the granular material by an apparatus, and a step of spreading the granular material along a band of the infinite belt conveying device during conveyance of the granular material, and in the step of rolling the granular material, The granular material is scraped off from the band by a plurality of scrapers installed at intervals along the conveying direction.

  In the step of spreading the granular material, it is preferable that the granular material is further uniformly scattered along the conveying direction of the granular material after the granular material is scraped off from the band.

  In the step of spreading the granular material, it is preferable to scrape the granular material alternately on both sides of the band along the conveying direction of the granular material.

  In the step of spreading the granular material, it is preferable to move the hopper and the infinite belt conveying device in a direction substantially orthogonal to the conveying direction of the granular material.

  In a preferred embodiment, the granular material is sprinkled on the sea surface and the sea floor is covered with the granular material.

  The granular material is conveyed by an infinite belt conveying device, and the granular material is scraped off by a plurality of scrapers installed at intervals along the conveying direction, so that the particles are regularly and almost uniformly granular over the entire width in the conveying direction. You can sprinkle things.

  Before explaining the embodiments of the present invention, the background to the present invention will be described.

  As explained in the background art, recently, tidal flat construction work has been carried out. In this case, from the viewpoint of environmental protection, most of the constructed sand is maintained dredged sand dredged with sand collected in the port. However, maintenance dredged sand has many clay components (silt content), so seaweed is hard to grow. Therefore, sea sand is spread on the surface of the maintenance dredged soil to make it easy to grow seaweed.

  However, in the seas around Japan, including the Seto Inland Sea, sea sand has been collected on a large scale, and there are many places where sea sand collection is prohibited. Therefore, the inventors of the present invention have considered using coal ash granulated material obtained by solidifying coal ash with cement instead of sand. Coal ash granulate is a recycled product using fly ash generated from thermal power plants, adsorbs eutrophication substances such as phosphorus and nitrogen that cause red tide, and has a lower specific gravity than sand. It has the advantage of being easy to diffuse in and easily spread on the sea floor.

  Then, when examination of the construction method suitable for the bottom of coal ash granulation was carried out, all the conventional methods had problems as described above. In particular, in the water transportation method, a new problem has emerged in which coal ash granulated materials are crushed into fine particles in the pump and pipe, generating a large amount of turbid water and polluting the sea. As a result of intensive studies to solve the problems of the conventional construction method, using a belt conveyor that conveys the conveyed product so as not to spill, it is possible to spill the conveyed product halfway while conveying it in the opposite direction to the conventional idea. The inventors of the present invention have come up with the present invention for producing a granular material uniformly and efficiently.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following drawings, components having substantially the same function are denoted by the same reference numerals for the sake of brevity.

(Embodiment 1)
FIG. 1 to FIG. 3 show a rolling-out device according to the first embodiment. 1 is a top view, FIG. 2 is a front view, and FIG. 3 is a side view seen from the right side of FIG.

  This scraping device includes a hopper 10, a belt conveyor (infinite belt transport device) 20, a plurality of scrapers 40, 40,. And this dredging device is piled up on the dredger of the trolley, and dredging from the dredge to the sea surface.

  The hopper 10 is charged with and stored granular coal ash granulated material. Then, the granulated coal is supplied to the belt conveyor 20 from the supply port at the bottom of the hopper 10. Here, the coal ash granulated material is mixed and hardened at a ratio of about 85% coal ash and about 15% cement, and has a diameter of about 1 mm to 40 mm. In addition, although a coal granule may be crushed at the time of conveyance etc. and a diameter may become small, since most are still the original diameter, there is no problem. Moreover, the specific gravity is smaller than that of sand, and it has an adsorbing ability to adsorb more eutrophication substances such as ammonia nitrogen and phosphoric acid than sand.

  The coal ash granule supplied from the hopper 10 onto the belt conveyor 20 is placed on the belt (band) 30 and is carried to the lower side of FIG. 1 and the right side of FIG. A plurality of scrapers 40, 40,... Made of metal plates are installed above the belt 30 to scrape the coal ash granulated material from the belt 30. The coal ash granulated material scraped off falls into the shooter 50 installed on the side and the lower side of the belt 30 and passes through the shooter 50 to the sea.

  The plurality of scrapers 40, 40,... Are disposed at intervals from each other along the traveling direction of the belt 30 (coal ash granulated material transport direction). The intervals between the scrapers 40, 40,... Are substantially equal. Each scraper 40 has an end point at a position slightly protruding from the side of the belt 30 starting from the belt 30 center line extending in the traveling direction of the belt 30. Further, the end point is placed behind the starting direction of each scraper 40 in the traveling direction of the belt 30, and the scrapers 40, 40,... . The installation angle of the scrapers 40, 40,... With respect to the traveling direction of the belt 30 is about 45 degrees. The scrapers 40, 40,... Are plate-like, and are installed so that the surfaces of the scrapers 40, 40,. As described above, since the scrapers 40, 40,... Are installed, the coal ash granulated material on the belt 30 strikes the surface of the scrapers 40, 40,. It is scraped off the outside.

  In this embodiment, as shown in FIG. 4, scrapers 40 a, 40 b, 40 c, and 40 d are alternately installed on both sides of the bisector 60 that bisects the belt width and in the belt traveling direction. The coal ash granulated material is scraped off on both sides of the bisector 60 so that the amount is almost the same at any position of the belt 30. By doing in this way, it can avoid that a load is biased to any one side of the belt 30, and the belt 30 can be prevented from meandering and stably conveyed.

  Also, as shown in FIG. 4, the scrapers 40a, 40b, 40c, 40d and the upper surface of the belt 30 are provided with a predetermined separation distance, but in order to spread the coal ash granulated material uniformly along the belt traveling direction, In the scraper group arranged on one side of the bisector 60 (for example, the upper scrapers 40a and 40c in FIG. 4A), the separation distance is set so as to decrease as the distance from the hopper increases. That is, when the distance between the adjacent scrapers 40a and 40c in the scraper group is compared, the distance between the scraper 40c farther from the hopper 10 is smaller. The setting of the separation distance is the same in the scraper group on the other side of the bisector 60 (the lower scrapers 40b and 40d in FIG. 4A). By setting the separation distance in this way, any of the scrapers 40a, 40b, 40c, 40d can always scrape the coal ash granulation, and the coal ash granulation is evenly spread along the belt traveling direction. be able to. In this embodiment, the scraper 40a and the scraper 40b, and the scraper 40c and the scraper 40d are set to have the same distance from the belt 30, but may be different.

  The coal ash granulated material scraped off by the scrapers 40, 40,... Falls into the receiving port 52 of the shooter 50. The shooter 50 is a passage for the coal ash granule installed so that the coal ash granule surely falls to a predetermined place on the sea surface, and the coal ash granule scraped off on both sides of the belt 30 is joined. And discharged from the discharge port 54. In addition, a scattering member (not shown) is provided in the shooter 50 so that the coal ash granules are evenly spread along the belt longitudinal direction, and the falling coal ash granules are evenly scattered. ing.

  The coal ash granulated material discharged from the discharge port 54 of the shooter 50 is sprinkled on the sea surface along the shoreline of the trolley. Since the coal ash granule has a lower specific gravity than sand, it is easy to diffuse in seawater and is spread more uniformly by this diffusion. In the brewing apparatus of this embodiment, the coal ash granulated material is squeezed out constantly and uniformly over the entire length of the belt 30 in the longitudinal direction, so that the trolley is moved at a constant speed in a direction perpendicular to the belt traveling direction. If moved, a coal ash granule having a uniform thickness can be laid on the seabed. The laying thickness of the coal ash granulated material can be adjusted by the conveying speed of the belt conveyor 20 and the moving speed of the carriage.

  In the present embodiment, since the brewing method is performed using the brewing device as described above, the following effects can be obtained.

  Since the coal ash granule is scraped uniformly along the traveling direction of the belt 30 using the plurality of scrapers 40, 40,..., The coal ash granule is always uniformly distributed over the entire length of the belt 30. Can be carried out. Then, by adjusting the conveying speed of the belt 30 and the moving speed of the brewing device itself, the laying thickness of the crushed coal ash granulated material can be freely adjusted. In particular, it is possible to easily reduce the laying thickness.

  By moving the rolling-out device itself at a constant speed, the rolling-out can be carried out continuously without stopping halfway, so that the rolling-out work can be performed in a short time. In particular, when the laying thickness is thin, widening can be carried out in a short time by increasing the moving speed, so that the construction efficiency becomes very high and the construction cost can be kept low.

  In this embodiment, unlike other conventional methods, the coal ash granulated material that has been sprinkled does not overlap, so that the uniformity of thickness is good and the coal ash granulated material needs to be wastefully sprinkled. There is no.

  In the present embodiment, the width of the belt conveyor 20 is widened, the conveyance speed is increased, the amount of coal ash granulated material discharged from the hopper 10 is increased per unit time, and so on. The amount can be easily increased and the construction capacity can be easily increased.

  Moreover, since it is relatively easy to move the rolling-out device at a constant speed, it is easy to keep the uniformity of the laying thickness of the coal ash granulated material that has been rolled out.

(Embodiment 2)
The scraping device according to the second embodiment is different from that of the first embodiment except for the scraper, and the remaining configuration is the same.

  FIG. 5 is a top view of the scraping device according to the present embodiment. The scrapers 41, 41,... Of the present embodiment have a V shape when viewed from above. Among these, the central pointed part is directed to the hopper 10 side. The intervals between the scrapers 41, 41,... Are substantially equal. In the adjacent scrapers 41, 41, the separation distance from the belt 30 is set to be smaller when the scrapers 41 and 41 are arranged farther than the hopper 10. In this embodiment, the coal ash granulated material is always scraped off on both sides of the belt 30 in the present embodiment. Therefore, the same amount of coal ash is always on both sides of the bisector on the belt 30. Since the granulated material is placed, the meandering of the belt 30 due to the uneven load does not occur. Therefore, the coal ash granulated material can be stably conveyed, and can always be uniformly squeezed out.

  In addition to the above effects, the same effects as those of the first embodiment are also achieved.

(Embodiment 3)
The scraping device according to the third embodiment is the same as the first embodiment except that the scraper is different and the remaining configuration is the same.

  FIG. 6 is a top view of the scraping device according to the present embodiment. In this embodiment, the scrapers 42, 42,... Are inclined at 45 degrees with respect to the traveling direction of the belt 30 over the entire width of the belt 30, and are arranged in parallel to each other. The effect of this embodiment is the same as that of the first embodiment.

(Embodiment 4)
The scraping device according to the fourth embodiment is the same as the first embodiment except that the scraper is different and the remaining configuration is the same.

  FIG. 8 is a top view of the scraping device according to the present embodiment. Like the scraper of the first embodiment, the scrapers 44a, 44b,... Of the present embodiment are alternately installed on both sides of the bisector 60 that bisects the belt width and in the belt traveling direction. The tip of the bisector 60 side of the scrapers 44a, 44b,... And the bisector 60 are spaced apart from each other, but in order to spread the coal ash granulated material uniformly along the belt traveling direction, In the scraper group arranged on the side (for example, the lower scrapers 44a, 44c, 44e in FIG. 8), the separation distance is set to be smaller as the distance from the hopper is longer. That is, when the distance between adjacent scrapers 44a, 44c, and 44e in the scraper group is compared, the distance between the scraper 44c farther from the hopper 10 than the scraper 44a is smaller and the distance between the scraper 44e and the scraper 44c. The separation distance is small. The setting of the separation distance is the same in the scraper group on the other side of the bisector 60 (upper scrapers 44b, 44d, and 44f in FIG. 8). By setting the separation distance in this way, any scraper 44a, 44b,... Can always scrape off the coal ash granulated material, and can evenly pulverize the coal ash granulated material along the belt traveling direction. it can. In the present embodiment, the scrapers 44a, 44b,... Are alternately arranged in the belt traveling direction on both sides of the bisector 60, but may not be alternately. The effect of this embodiment is the same as that of the first embodiment.

(Other embodiments)
The above-described embodiments are examples of the present invention, and the present invention is not limited to these examples.

  The granular material sprinkled from the scooping device is not limited to the coal ash granulated material. It may be sand or pebbles, or may be any material as long as it is granular, such as crushed concrete or rock, grains, beans, crushed foods, or the like. In addition, the brewing apparatus and the brewing method of the present invention can also be used for brewing powder.

  The infinite belt conveying device used for the spreading device is not limited to the belt conveyor. For example, an apron feeder or the like may be used.

  The scraper may have any shape as long as it can scrape off the granular material, and any material may be used. Further, the installation angle and installation position with respect to the belt, the number of arrangements, and the like are not limited. For example, a metal plate having the shape shown in FIG. In this case, the left end of the figure is disposed above the belt bisector, and the right end is disposed at a position protruding outward from the belt side end. Further, the shape may be a rod shape or a comb shape instead of a plate shape.

  The moving device used for the hoisting device is not limited to a trolley. It may be a vehicle or a device that travels on a rail.

  The scattering member installed in the shooter may have any shape. It may be a plurality of plates, or may be a pachinko nail, for example.

  According to the brewing apparatus and the brewing method according to the present invention, it is possible to squeeze particulates uniformly over a predetermined width, and to construct gravel and coal ash granulated materials, etc. It can be used for, etc., and is useful.

FIG. 3 is a top view of the scooping device according to the first embodiment. It is a front view of the rolling-out apparatus of Embodiment 1. It is a side view of the rolling-out apparatus of Embodiment 1. It is a partial schematic enlarged view showing the installation state of the scraper. It is a top view of the rolling-out apparatus of Embodiment 2. It is a top view of the rolling-out apparatus of Embodiment 3. It is a figure which shows an example of a scraper. It is a top view of the rolling-out apparatus of Embodiment 4.

Explanation of symbols

10 Hopper 20 Belt conveyor (infinite belt conveyor)
30 belt
40 Scraper 41 Scraper 42 Scraper 43 Scraper 44 Scraper 50 Suter 52 Receiving port 54 Discharging port 60 Bisecting line

Claims (13)

A device for spreading granular materials,
A hopper for supplying particulate matter;
An infinite belt conveyance device for conveying the granular material supplied from the hopper;
A plurality of scrapers that are installed above the belt of the infinite belt conveying device and scrape the granular material from the belt;
The plurality of scrapers are installed at intervals from each other along the conveying direction of the granular material,
The scraping device, wherein the separation distance between the scraper and the strip becomes smaller as the distance between the scraper and the hopper becomes larger.   The scraping device according to claim 1, wherein the plurality of scrapers are installed so as to scrape off the granular material on both sides of the belt in the transport direction.   The scraping device according to claim 1, wherein the plurality of scrapers are installed so as to scrape off the granular material alternately on both sides of the band in the transport direction. A device for spreading granular materials,
A hopper for supplying particulate matter;
An infinite belt conveyance device for conveying the granular material supplied from the hopper;
A plurality of scrapers that are installed above the belt of the infinite belt conveying device and scrape the granular material from the belt;
The plurality of scrapers are alternately arranged on both sides of a bisector that is spaced apart from each other along the conveying direction of the granular material and bisects the width of the band,
On each side divided by the bisecting line, the separation distance between the scraper and the strip decreases as the distance between the scraper and the hopper increases. A device for spreading granular materials,
A hopper for supplying particulate matter;
An infinite belt conveyance device for conveying the granular material supplied from the hopper;
A plurality of scrapers that are installed above the belt of the infinite belt conveying device and scrape the granular material from the belt;
The plurality of scrapers are installed on both sides of a bisector that bisects the width of the band along the conveying direction of the granular material and from the side end of the band toward the bisector Extending to
On each side divided by the bisecting line, the larger the distance between the scraper and the hopper, the smaller the separation distance between the bisecting tip of the scraper and the bisecting line. Ejecting device. A shooter is further provided at least below the infinite belt conveyance device,
The said shooter is provided with the receiving port which receives the said granular material scraped off from the said belt | band | zone, and the discharge port extended along the said conveyance direction and discharging the said granular material. The scraping device described in 1. A moving device that moves at least the hopper, the infinite belt conveying device, and the scraper;
The spreading device according to any one of claims 1 to 6, wherein a moving direction of the moving device is a direction substantially orthogonal to a conveying direction of the granular material.   8. The hoisting device according to claim 7, wherein the moving device is a ship. A method of rolling out granular materials using a hopper and an infinite belt conveying device,
Supplying particulate matter from the hopper to the infinite belt transport device;
A conveying step of conveying the granular material by the infinite belt conveying device;
Rolling the granular material along the band of the infinite belt conveying device during the conveyance of the granular material,
In the step of spreading the granular material, the granular material is scraped off from the band by a plurality of scrapers installed at intervals along the conveying direction of the granular material.   10. The method according to claim 9, wherein in the step of spreading the granular material, the granular material is further scattered along the conveying direction of the granular material after the granular material is scraped off from the band. Construction method.   11. The scraping method according to claim 9, wherein in the step of spreading the granular material, the granular material is scraped alternately on both sides of the band along the conveying direction of the granular material.   The said hopper and the said infinite belt conveyance apparatus are moved to the direction substantially orthogonal to the conveyance direction of the said granular material in the process of whispering the said granular material, The any one of Claim 9 to 11 characterized by the above-mentioned. Squeezing method.   The method according to any one of claims 9 to 12, wherein the granular material is sprinkled on the sea surface and the seabed is covered with the granular material.

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