JP2022088696A - Sand gravel selection tool - Google Patents

Abstract

To provide a sand gravel selection tool that can further simply and efficiently selecting sand gravels having a prescribed or greater grain size from sediment contained in water.SOLUTION: A sand gravel selection tool for selecting sand gravels contained in sediment includes: a first pipe into which a water flow containing sediment flows from the upstream side; and a second pipe which is connected by branching from the first pipe at a branching position of the first shell and into which the water flow from the first pipe flows. The first pipe has a plurality of hole parts arranged in a peripheral surface on the upstream relative to the branching position and arranged in series along a longer direction of the first pipe, a first filter arranged so as to cover the respective hole parts, and a second filter arranged so as to cover an opening of the first pipe on the downstream side relative to the branching position.SELECTED DRAWING: Figure 1

Description

The present invention relates to a gravel sorter used for sorting gravel, and in particular, collects gravel deposited on the bottom of water such as the sea, rivers, lakes, and swamps, and sorts and sorts gravel contained in the gravel according to the particle size. Regarding the gravel sorter to be used.

When collecting gravel in water and sorting gravel with a predetermined particle size or larger, conventionally, water containing earth and sand is pumped up by a pump, and the earth and sand contained in the pumped water is applied to a shaking device having a mesh, for example. Work is being carried out to sort and separate gravel having a predetermined particle size or larger.

Further, Patent Documents 1-3 below propose an invention relating to an earth and sand treatment device for selecting gravel having a predetermined particle size or more from earth and sand in water.

Japanese Unexamined Patent Publication No. 6-328001 Japanese Unexamined Patent Publication No. 10-337418 Japanese Patent Application Laid-Open No. 2003-230847

The inventor of the present application has proceeded with research and development of an instrument for sorting gravel contained in earth and sand without using a large-scale device, and has now made it easier and more efficient to have a predetermined particle size or more from earth and sand contained in water. We have invented a gravel sorter capable of sorting gravel.

Therefore, an object of the present invention is to provide a gravel sorter capable of more easily and efficiently sorting gravel having a predetermined particle size or more from earth and sand contained in water.

The gravel sorter of the present invention for achieving the above object is a gravel sorter for sorting gravel contained in earth and sand, in which a first pipe body (main body pipe) through which a water stream containing earth and sand flows from the upstream side and the first pipe. It is provided with a second pipe (branch pipe) in which the water flow from the first pipe flows into the first pipe, which is branched and connected from the first pipe at the branch position of the first pipe. The pipe body is provided in a plurality of holes provided on the peripheral surface on the upstream side of the branch position and arranged in series along the longitudinal direction of the first pipe body, and each hole portion (so as to cover). It is characterized by having a first filter arranged and a second filter arranged in (covering) the opening of the first tube body on the downstream side of the branch position. do.

Preferably, the spacing length of the holes is equal to or greater than the diameter of the holes in the longitudinal direction of the first tube. Further, the second pipe body branches at a predetermined angle of less than 90 degrees from the first pipe body, and the second filter has the predetermined angle along the longitudinal direction of the second pipe body. Is arranged in the cross section of the first tubular body. Further, the predetermined angle is 20 degrees to 45 degrees. Three or more holes are provided.

According to the gravel sorter of the present invention, it is possible to more easily and efficiently sort gravel having a predetermined particle size or more from the earth and sand contained in water.

It is a figure which shows the whole structure of the earth and sand treatment apparatus using the gravel sorter in embodiment of this invention. It is a figure which shows the structural example of the gravel sorter in embodiment of this invention. It is a figure explaining the installation interval of the hole part 33. It is a figure which shows the more specific structural example of the gravel sorter in embodiment of this invention. The photograph of the prototype of the upstream side pipe member 30A is shown. The photograph of the prototype of the downstream side pipe member 30B is shown. It is a figure which shows the modification configuration example of the gravel sorter in embodiment of this invention. It is a figure which shows another modified composition example of the gravel sorter in embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, such embodiments do not limit the technical scope of the invention.

FIG. 1 is a diagram showing an overall configuration of a sediment treatment device using a gravel sorter according to an embodiment of the present invention. The sediment treatment device is a structure for collecting sediment accumulated on the bottom of water such as seas, rivers, lakes, and swamps, and sorting and sorting the gravel contained in it according to the particle size, and is installed in water. It is configured to include a submersible pump (sand pump) 10, a hose 20 for flowing water containing earth and sand sucked up by the submersible pump 10, and a gravel sorting tool 30 attached to the tip of the hose 20.

The submersible pump (sand pump) 10 is a pump used for sucking up earth and sand together with water. For example, a so-called turbo type pump is used. It is a tubular member that forms a flow path that sends water containing water to the workplace.

The gravel sorter 30 is a tubular member that sorts sand sucked up together with water by a submersible pump 10 according to its particle size, and is attached to the tip of a hose 20.

FIG. 2 is a diagram showing a configuration example of a gravel sorter according to an embodiment of the present invention. The gravel sorter 30 includes a main body pipe (first pipe body) 31 and a branch pipe (second pipe body) 32 that branches and extends from a predetermined branch position 313 of the main body pipe 31. The main body pipe 31 and the branch pipe 32 are preferably circular pipes made of steel, but other materials such as aluminum pipes and synthetic resin pipes made of vinyl chloride may be used, and the cross-sectional shape is not limited to a circular shape but may be rectangular or the like. It may be in the shape of. In the main body pipe 31, the opening end on the side connected to the hose 20 is referred to as the upstream opening end 311 and the opening end on the opposite side thereof on the side for discharging earth and sand is referred to as the downstream opening end 312.

A hose 20 is connected to the upstream opening end 31a of the main body pipe 31, and water containing earth and sand pumped from the upstream opening end 311 of the main body pipe 31 by a submersible pump 10 via the hose 20 is inside the main body pipe 31. Flow. The diameter of the main body pipe 31 is appropriately designed according to the discharge capacity of the submersible pump 10, and is usually about 5 cm to 20 cm.

The main body pipe 31 is provided with a plurality of holes 33 on the peripheral surface on the upstream side of the branch position 313 where the branch pipe 32 branches. The plurality of holes 33 are arranged in series along the longitudinal direction of the main body tube 31. A net-like filter 34 is arranged in each hole 33 so as to cover the hole 33.

The hole 33 of the main body tube 31 is, for example, a rectangular, circular, or elliptical hole. For example, the diameter of the main body tube 31 in the longitudinal direction is about 10 cm, and the diameter in the vertical direction perpendicular to the hole is a rectangular hole of about 5 cm. ..

The filter 34 is a member having a mesh-like or mesh-like gap such as a mesh-like wire mesh or punching metal, and the size of the gravel to be sorted is set by the size of the gap interval.

For example, when it is desired to select gravel having a particle size of 5 mm or more as a set particle size, by arranging a filter 34 having a gap interval of 5 mm in the hole 33, water containing earth and sand flows from the hole 33 while flowing through the main body pipe 31. The gravel of less than 5 mm is discharged, and the gravel of 5 mm or more that does not pass through the filter 34 of the hole 33 is discharged from the branch pipe 32, and the gravel discharged from the branch pipe 32 is collected to have a set particle size. It is possible to sort gravel of 5 mm or more. As shown in FIG. 1, gravel having a particle size smaller than the set particle size (described as “fine sand” in FIG. 1) is discharged through the filter 34 of the hole 33 and the filter 35 of the downstream opening end 312, and is set. The gravel having a particle size or larger (described as “coarse sand” in FIG. 1) is discharged from the tip opening of the branch pipe 32, and the gravel is sorted according to the particle size.

FIG. 3 is a diagram illustrating the installation interval of the hole 33. The holes 33 are arranged at a plurality of locations in series along the longitudinal direction of the main body tube 31, and the installation interval L1 of the holes 33 is set to be the same as or longer than the diameter L2 in the longitudinal direction of the main body tube 31. Will be done. According to the experiments and research of the inventors,
Installation interval of holes 33 L1 ≧ Diameter L2 in the longitudinal direction of the main body pipe 31
By providing the hole 33 in the main body pipe 31 so as to be, it has become possible to more efficiently discharge the earth and sand from the hole 33. Further, the number of the holes 33 to be installed is preferably three or more, and by providing three or more holes 33, the gravel discharged from the branch pipe 32 cannot be completely passed by the holes 33. The amount of gravel having a particle size smaller than the set particle size discharged from the branch pipe 32 is reduced, and the sorting accuracy can be further improved.

In the sorting work, the main body pipe 31 is installed so that the hole 33 faces downward, and the earth and sand passing through the filter 34 along with the water flow down toward the ground.

Further, in the main body pipe 31, a net-like filter 35 is arranged so as to cover the cross section of the downstream side opening end 312 of the main body pipe 31 on the downstream side of the branch position 313 where the branch pipe 32 branches. The filter 35 is the same filter as the filter 34 arranged in the hole 33. The filter 35 is a member having a mesh-like or mesh-like gap such as a mesh-like wire mesh or punching metal, and is the same as the gap spacing filter 34. In the sorting work, in the process in which the earth and sand flowing through the main body pipe 31 flows from the upstream side (submersible pump 10 side) to the downstream side (branch pipe 32 side) of the main body pipe 31, gravel having a particle size smaller than the predetermined particle size is in the hole. The filter 34 of 33 is discharged through the filter 34, and further, the water is discharged through the filter 35 arranged so as to cover the downstream side opening end 312 at the downstream opening end 312 of the main body pipe 31. The gravel that has not passed through the filter 34 and the filter 35 is discharged from the branch pipe 32, and the gravel having a set particle size or larger is sorted.

The branch pipe 32 extends diagonally downstream of the main body pipe 31 and branches, that is, branches and connects to the main body pipe 31 at a predetermined mounting angle θ of less than 90 degrees. The attachment angle θ of the branch pipe 32 is preferably 45 degrees or less, particularly preferably a small angle of about 20 to 45 degrees. By setting the angle to a relatively small angle, the branching loss of the pipeline resistance can be made smaller, and the water containing the earth and sand in the main body pipe 31 can flow smoothly.

The filter 35 described above is preferably arranged along the longitudinal direction of the branch pipe in the cross section of the downstream side opening end 31 of the main body pipe 31 at the attachment angle of the branch pipe 32. By arranging the filter 35 at the same angle as the attachment angle of the branch pipe 32 so as to diagonally block the cross section of the downstream opening end 312, the surface area of the filter 35 is increased and the gravel smaller than the particle size set by the filter 35 is formed. In addition to improving the filtration capacity of the main body pipe 31, the bending resistance of the pipe line loss when the water flow reaching the downstream side opening end 312 of the main body pipe 31 changes its flow direction and flows into the branch pipe 32 can be reduced.

In the gravel sorter 30 of the present invention, gravel having a set particle size or more is discharged from the branch pipe 32, and by collecting the gravel discharged from the branch pipe 32, gravel having a set diameter or more can be sorted and obtained. become able to.

FIG. 4 is a diagram showing a more specific configuration example of the gravel sorter according to the embodiment of the present invention. As shown in FIG. 4A, the gravel sorter 30 is configured so that the main body pipe 31 can be separated into two at the upstream side front position of the branch position 313, and the upstream side pipe member is separated so as to be connectable to each other. It is composed of 30A and a downstream side pipe member 30B.

FIG. 5 shows a photograph of a prototype of the upstream pipe member 30A. In FIGS. 4 and 5, the upstream side pipe member 30A is provided with three holes 33 arranged in series in the longitudinal direction, and the net-like filter 34 is wound around the peripheral surface of the upstream side pipe member 30A. , Is attached so as to cover the hole 33. The filter 34 wound around the upstream pipe member 30A is fixed by the fixture 36.

FIG. 6 shows a photograph of a prototype of the downstream side pipe member 30B. In FIGS. 4 and 6, a branch pipe 32 is connected to the downstream side pipe member 30B, and the branch pipe 32 is attached to the downstream side pipe member 30B by, for example, welding. A flange 37 is attached to the downstream opening end 312 of the downstream pipe member 30B, and the mesh filter 35 is sandwiched between two flanges 37 and is sandwiched between two flanges 37 by a fixture 38 such as a bolt or nut to provide a downstream opening end 312. It is installed so as to cover the cross section of. One of the flanges 37 is formed at the downstream open end 312 by, for example, welding. FIG. 4B is a diagram showing a state in which the filter 35 is attached to the flange 37, and the cross section of the downstream opening end 312 is viewed from the front along the line AA of FIG. 4A. A schematic diagram is shown.

FIG. 7 is a diagram showing a modified configuration example of the gravel sorter according to the embodiment of the present invention. In the configuration example of FIG. 7, the gravel sorter 30 has an extension pipe 39 attached to the downstream side of the filter 35. Depending on the surrounding environment in the workplace, it is possible to form a tubular flow path through which the water flow passing through the filter 35 flows.

FIG. 8 is a diagram showing another modified configuration example of the gravel sorter according to the embodiment of the present invention. In the configuration example of FIG. 8, the filter 35 is attached to the vertical cross section of the downstream open end 312 instead of being attached at an angle along the attachment angle of the branch pipe 32. It can be manufactured more easily.

The above-mentioned gravel sorter of the present invention has been described as a configuration including a main body pipe 31 and a branch pipe 32 branching from the main body pipe 31, but the main body pipe 31 in which the branch pipe 32 is bent (or curved) from the main body pipe 31 is extended. It can also be understood as an extension tube as part of. In that case, the downstream side opening end 312 in which the filter 35 is arranged can be regarded as a hole provided in the peripheral surface of the main body tube 31. The configuration of the gravel sorter of the present invention including the main body pipe 31 and the branch pipe 32 also includes the configuration according to the above understanding.

The present invention is not limited to the above-described embodiment, and there are design changes within a range not deviating from the gist including various modifications and modifications that can be conceived by a person having ordinary knowledge in the field of the present invention. However, it is of course included in the present invention.

10: Submersible pump, 20: Hose, 30: Debris sorter, 30A: Upstream side pipe member, 30B: Downstream side pipe member, 31: Main body pipe, 32: Branch pipe, 33: Hole, 34: Filter, 35: Filter, 36: Fixture, 37: Flange, 38: Fixture, 39: Extension pipe, 311: Upstream open end, 312: Downstream open end, 313: Branch position

Claims (5)

In a gravel sorter that sorts gravel contained in earth and sand,
The first pipe body through which a water stream containing earth and sand flows from the upstream side,
It is provided with a second pipe body that branches and connects from the first pipe body at a branch position of the first pipe body and into which the water flow from the first pipe body flows.
The first tube body covers a plurality of holes provided on the peripheral surface on the upstream side of the branch position and arranged in series along the longitudinal direction of the first tube body, and each hole portion. It is characterized by having a first filter arranged so as to cover the opening of the first tube body downstream from the branch position and a second filter arranged so as to cover the opening of the first tube body. Gravel sorter to do. The gravel sorter according to claim 1, wherein the interval length between the holes is equal to or larger than the diameter of the holes in the longitudinal direction of the first tube. The second tubular body branches at a predetermined angle of less than 90 degrees from the first tubular body, and the second filter is said to have the predetermined angle along the longitudinal direction of the second tubular body. The gravel sorting tool according to claim 1 or 2, wherein the gravel sorting tool is arranged in a cross section of the opening of the first pipe body. The gravel sorter according to claim 3, wherein the predetermined angle is 20 degrees to 45 degrees. The gravel sorter according to any one of claims 1 to 4, wherein the holes are provided in three or more.

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