JPH08215601A - Method and apparatus for screening sand in sand collecting barge - Google Patents

Abstract

PURPOSE: To improve sand screening efficiency by supplying earth-sand water collected from the bottom of sea, etc., screening into water containing sand with a specified size or smaller, sand with a specified size or greater, and stones and shellfishes, and discharging the screened materials separately. CONSTITUTION: In collecting sand from the bottom of sea, etc., and screening the sand, a sand pump installed in a sand collecting barge is operated in advance, and sand is sucked up to be sent to a sand classifier 1. In the classifier 1, earth-sand water is first introduced to a water introduction part 10 and distributed uniformly in the first screening part box 21 to be supplied to the first screening part 20. In this process, the earth-sand water is dropped on the first screening part gauze 23 to select the earth-sand water of a size to pass through the mesh. Next, the earth-sand water is led to the second screening part 30 and dropped on the second screening part gauze 33 so that the earth-sand water with a specified size or smaller to pass through the mesh is dropped on a water collecting plate 116 to be selected. The earth sand water is then supplied to a rubbish chute part 50, and the earth sand water with a specified size or greater is discharged outside the barge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sand sorting apparatus and a sand sorting method for a sand sampling ship, and more particularly to a sand sorting apparatus for collecting sand of a predetermined size or less from the bottom of a sea, river, lake or the like. The present invention relates to a sand sorting device and a sand sorting method for sorting.

[0002]

2. Description of the Related Art FIG. 4 shows an outline of a sea sand sampling system,
FIG. 4 of JP-A-3-84123 is shown. The sand sampling boat 101 is provided with a sand pump 104 that can be fed to the seabed from the hull side through a hose 102 and a sand sampling pipe 103. At the time of sea sand sampling, first, the sand sampling vessel 101 is anchored and moored, and then the two first davits 105 and the second davits 10 are used.
The hose 102, the sand collecting pipe 103, and the sand pump 104, which are laid up and down to be loaded on the ship, are attached to the outboard 101.
a through a pulley (not shown) attached to the davit 105 and the second davit 106, and a wire 1 by a winch.
07 and 108 are fed to the hose 102 and the sand collecting pipe 1.
03 and sand pump 104 are lowered to the seabed. When the sand pump 104 is lowered to the seabed, the sand pump 104
To suck up the sand on the seabed in a chiller state. The sand pump 104 is driven by rotating an underwater motor (not shown) directly connected to the pump by electricity or hydraulic pressure. A power wire or a hydraulic hose 109 for driving the underwater motor is attached to the outer circumference of the sand collecting pipe 103. It is arranged up to the position of the sand pump 104.

The water containing the sucked earth and sand (hereinafter referred to as earth and sand water) is drawn by the sand pump 1 along the arrow in the figure.
04 through the sand sampling pipe 103 and the hose 102, and sent to the sorting machine 110 installed in the sand sampling vessel 101.
In 10 the water containing the sand of a predetermined size or less, and a part of the water and the sand of a predetermined size or more, shellfish, and stones are sorted, and the water containing the sand of a predetermined size or less is passed through the chute 111. The sorting tank 112 onboard the ship is equipped with a sorting machine 1 for sand, shellfish, and stones larger than a predetermined amount.
It is discharged to the outboard 101a from the ten chute chute 113. In the inboard sorting tank 112, the sand is separated into sand and water of a predetermined size or less, and the sand of a predetermined size or less is sorted in the ship.
2, the water is discharged from the discharge port 114 to the outboard 101a.

FIG. 5 is a plan view of a conventional sorter 110, and FIG. 6 is a side sectional view of the sorter 110. Sorting machine 1
Reference numeral 10 is an inflow section 130 for receiving the sediment water from the hose 102.
And a selection unit 140 that receives the sediment water from the water inlet unit 130 and selects water containing sand of a predetermined size or less, and sand, shellfish, and stones of a predetermined size or more, and a predetermined level or more from the selection unit 140. It consists of a gull chute 113 that receives sand, shellfish, and stones and discharges it out of the ship. Below the sorting unit 140 of the sorting machine 110, the chute 111 is arranged in a direction perpendicular to
The chute 111 receives water containing sand of a predetermined size or less that has been sorted by the sorting unit 140, and uses the water to sort the water into the inboard sorting tank 11
2 is discharged to a predetermined position. Discharge is chute 111
The plurality of discharge ports 111a provided in the above are sequentially switched to discharge, and the chute 111 moves in a predetermined direction to discharge to a predetermined position. In the sorting unit 140, a wire net 142 is arranged on a plate 141 formed in a grid pattern,
The grid plate 141 has a predetermined angle (about 15 to 20 degrees) with respect to the horizontal plane of the hull. Wire mesh 1
Reference numeral 42 is arranged so as to be detachable from the plate 141 formed in a lattice shape. Further, a glass chute 113 is connected to an extension of the plate 141. Below the grid-shaped plate 141, the chute 11 receives water containing sand having a predetermined size or less that has passed through the wire net 142.
A water collecting plate 116 that guides the water to 1 is provided. The sorter 110 is attached to the sand sampling ship 101 by a frame 150.

[0005]

SUMMARY OF THE INVENTION In the above conventional configuration,
When the sediment water is poured from the water inlet to the sorting section, the thrust of the water is weak, the sorting section is easily clogged with sand, and the slope is steep when the sand is clogged, so the water containing sand below the prescribed amount, along with the shellfish and stone, It will be discharged outside the ship. Further, there is a problem that the amount of earth and sand water that has been sucked up once again flows to the outside of the ship so that the seawater becomes dirty and the efficiency is low.

The present invention has been made in view of the above problems, and relates to a sand sorting apparatus for a sand sampling ship, and in particular, sand can be efficiently sorted when sand is sampled from a deep water bottom of a sea, river, lake or the like. The purpose is to provide a sand sorter.

[0007]

Therefore, according to the first invention of the sand sorting apparatus and the sand sorting method of the sand collecting ship of the present invention,
A sand sampling ship that collects sand from the bottom of the sea, rivers, lakes, etc., a pumping device that is installed on the sand sampling ship to pump water, sand, etc., and sand, stones, and shells from the pumping device In a sand sorting device of a sand sampling ship to be sorted, a water receiving part that receives water containing soil and sand sucked up from a hose, and a water containing sand of a predetermined size or less by receiving water containing soil and sand from the water inlet. And a first sorting section and a second sorting section for sorting sand, shellfish, and stones of a predetermined size or more, and water containing sand of a predetermined size or less from the first sorting section and the second sorting section of the ship. It is characterized in that it comprises a chute part for discharging to the sorting tank and a glass chute part for discharging sand, shellfish, and stones from the second sorting part in a predetermined amount or more and discharging them to the outside of the ship.

In the second invention, which is mainly based on the first invention,
A shield plate having a space in the upper portion between the water inlet and the first sorting unit, and a contact plate for dropping water containing earth and sand flowing into the first sorting unit from the water inlet to drop toward the wire mesh. .

In the third invention mainly based on the first invention or the second invention, there is a step between the first sorting section and the second sorting section.

According to a fourth aspect of the present invention, there is provided a sand selecting method for a sand collecting ship, in which water containing sand, shellfish and stones is pumped from the bottom of a sea, river, lake or the like, and the sand having a predetermined size or less is selected from the pumped water. The feature is that the water containing earth and sand is dropped to increase the speed and sort the sand.

According to a fifth aspect of the present invention, there is provided a sand selecting method for a sand collecting ship, in which water containing sand, shellfish and stones is pumped from the bottom of a sea, river, lake or the like, and sand having a size smaller than a predetermined size is selected from the pumped water. The feature is that the amount of sand to be selected is increased by passing the water containing earth and sand through the wire mesh in which the mounting angle of the wire mesh is reduced in the horizontal vicinity and the apparent size of the mesh of the wire mesh is increased.

According to a sixth aspect of the present invention, there is provided a sand selecting method for a sand collecting ship, wherein water containing sand, shellfish and stones is pumped from the bottom of a sea, river, lake or the like, and sand having a size smaller than a predetermined size is selected from the pumped water. The method is characterized in that water containing earth and sand is passed through the wire mesh of the first stage, water containing earth and sand not selected in the first step is dropped again, and the water is included in the wire mesh of the second step.

[0013]

According to the above construction, when the earth and sand water flows from the water inlet to the sorter, the thrust of the water becomes strong and the sand is hard to be clogged with the wire mesh. Further, even if the sand is clogged with the wire net due to the water falling from above, the sand that has fallen and increased in speed causes the sand to be dug up and flow downstream. In addition, even if sand is clogged with wire mesh, the slope is gentle, so that water often flows through the wire mesh, and water containing sand of a certain size or less is discharged out of the ship along with shellfish and stones. Less likely to do. Further, by making the wire mesh near horizontal, that is, by reducing the attachment angle of the wire mesh with respect to the horizontal angle, the inclination of the mesh of the wire mesh is reduced and the size of the mesh projected on the horizontal plane is increased. For this reason, the apparent mesh size of the wire mesh becomes large, and sand easily passes through. Further, since a plurality of places for dropping are provided, the above-mentioned effect can be obtained at a plurality of places.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the sand sorting apparatus and the sand sorting method for a sand collecting ship according to the present invention will be described below in detail with reference to the drawings. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. FIG. 1 is a side sectional view showing a first embodiment of a sand sorting apparatus for a sand collecting ship according to the present invention, and FIG. 2 is a partial sectional front view (U-U section) of FIG. 1 and 2, the sand sorting apparatus 1 includes a water inlet 10 that receives earth and sand water from a hose 102, water that contains earth and sand water that is received from the water inlet 10 and that contains sand of a predetermined size or more, and a predetermined amount or more. Of the sand, shellfish, and stones having a gentle gradient, the second sorting unit 30 having a steep gradient, and the sand, shellfish, and stones from the second sorting unit 30 having a predetermined amount or more. The glass chute unit 50 receives and discharges it to the outside of the ship. Below the first sorting section 20 and the second sorting section 30 of the sand sorting apparatus 1,
A chute 111 is arranged in the direction perpendicular to the direction.

The water inlet portion 10 is hollow and has a substantially rectangular parallelepiped shape with one corner having an R shape.
And a pipe body 12 fixed below the water entry box body 11 and connected to a pipe (not shown) from the hose 102. As shown in FIG.
Distribution plates 13 and 14 for distributing the water entering from the pipe body 12 to the water inlet part box body 11 at a predetermined interval in the width direction substantially evenly.
Is fixed to the water entry box body 11.

The first sorting part 20 is a hollow rectangular parallelepiped first sorting part box 21 fixedly connected to the water inlet part 10, and a rectangular shape of the first sorting part box 21. The first selection unit grid plate 22 formed in a grid shape on one side of the lower part of the body shape
And the first selection unit stretched over the grid plate 22 of the first selection unit.
And a wire mesh 23. At this time, the first sorting unit grid plate 22 and the first sorting unit wire net 23 are attached to the horizontal plane at a gentle gradient (Θa = about 0 ° to about 10 °). In addition, a contact plate 24 is fixedly installed to drop water onto one side of the upper side of the rectangular shape of the first sorting section box 21 and drop it on the lower first sorting section wire net 23. further,
A blocking plate 25 is provided between the water entry unit 10 and the first sorting unit 20 to block the water to increase the speed and to drop the water.

The second sorting unit 30 includes a second sorting unit box 31 formed in a hollow rectangular shape and fixedly connected to the first sorting unit 20, and a second sorting unit box 31. The second sorting unit grid plate 32 is formed in a grid shape on one side of the lower portion of the rectangular shape, and the second sorting unit wire net 33 is stretched on the second screening unit lattice plate 32. At this time, the second sorting unit grid plate 32 and the second sorting unit wire net 33 are attached to the horizontal plane at a steep slope (Θb = about 15 degrees to 22 degrees). Further, the first sorting unit box body 21 and the second sorting unit box body 31 are fixedly provided with a step (H). Also,
A contact plate 34 is fixedly mounted on one side of the upper side of the rectangular shape of the second sorting section box 31 to allow water to hit the second sorting section wire net 33 below.

The glass chute 50 is formed in the shape of a hollow trapezoid whose tip is narrowed (the same construction as the conventional one in FIG. 5).
It is continuously fixed to the second sorting section 30, and its tip is formed outside the ship. One side of the rectangular parallelepiped lower portion of the glass chute portion 50 is formed with a steep slope (about 15 to 22 degrees) with respect to the horizontal plane, as in the second sorting portion 30.

Next, the operation of the above structure will be described. At the time of sea sand sampling, first, the sand sampling ship 101 is anchored and moored, and the driver operates an operation lever (not shown) from the steering room to lower the sand pump 104 to the sea floor. When the sand pump 104 is lowered to the seabed, the sand pump 104 is operated to suck up sand on the seabed in a chiller state. The sucked earth and sand water is sent from the sand pump 104 through the sand collecting pipe 103 and the hose 102 to the sand sorter 1 installed in the sand collecting ship 101. In the sand sorting apparatus 1, the water enters the water inlet section 10 and is substantially evenly distributed to the entire first sorting section box 11 formed in a substantially rectangular parallelepiped shape.
to go into. At this time, the velocity of the diffused earth and sand water is increased at the location Sa where the passage area is small due to the blocking plate 25 between the water inlet section 10 and the first sorting section 20, so that the hollow space of the first sorting section 20 is closed. It passes above the second sorting unit box body 21 formed in a rectangular parallelepiped shape. The earth and sand water that has passed over the second sorting unit box 21 hits the contact plate 24 provided on the upper side of the second sorting unit box 21, and the first sorting unit 20 provided below has a gentle slope. 1 Drop on the selection unit wire net 23.

In the second screening part wire net 23 of the first screening part 20 having a gentle gradient, water containing sand having a size smaller than a predetermined size of the mesh of the second screening part wire net 23 passes and drops downward. At this time, even if sand having a size larger than a predetermined size of the second selection unit wire net 23 is blocked in the second selection unit wire net 23, it is stirred by the earth and sand water that is acceleratingly dropped from the top and is downstream. (To the second sorting section 30 side). Further, sand, stone, or shellfish having a size larger than a predetermined size of the mesh of the second sorting unit wire mesh 23 flows toward the second sorting unit 30 together with a considerable amount of sediment water that does not pass through. Further, by reducing the attachment angle of the wire mesh relative to the horizontal angle (installing the wire mesh in the vicinity of the horizontal), the inclination of the mesh of the wire mesh is reduced, and the size of the mesh projected on the horizontal plane is increased. For this reason, the apparent mesh size of the wire mesh becomes large, and sand easily passes through.

The sediment water flowing toward the second sorting section 30 is
While hitting the upper side 31a of the second sorting unit box 31, the step provided between the first sorting unit box 21 and the second sorting unit box 31 falls again to increase momentum. A considerable amount of the earth and sand water, which has increased this momentum, falls onto the steeply sloped second sorting part wire net 33 of the second sorting part 30. In the steeply sloped second sorting part wire net 33 of the second sorting part 30, water containing sand having a size smaller than a predetermined size of the mesh of the second sorting part wire net 33 passes through, and most earth and sand water is collected in the lower part. It falls on the plate 116. At this time, even if sand having a size larger than a predetermined size of the second selection unit wire net 33 is blocked by the second selection unit wire net 33, the sand is rapidly stirred from the top by a rapidly dropping earth and sand water. It flows toward the gallop chute 50 together with sand, stones, or shells having a predetermined size or more with a small amount of earth and sand water having a small gradient. Also,
A larger amount of sand can be selected by dropping the water containing the earth and sand that was not selected in the first step once again and selecting it with the wire mesh in the second step.

In the glass chute section 50, the first sorting section 20
And sand, stones, and shells of a predetermined size or more that did not pass through the wire nets of the second sorting unit and a small amount of earth and sand water flow along the iron plate 51 of the glass chute unit 50 and are discharged to the outside of the ship. .

FIG. 3 shows a sorting machine 110 according to the second embodiment of the present invention.
FIG. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. The 2nd sorting part 40 forms the 1st sorting part box 21 of the exterior, and the 2nd sorting part box 41 continuously, The 1st sorting part wire net 23 and the 2nd sorting part wire net 4 in it are formed.
3 and 3 are formed with a step (Ha). Second sorting section box 4
The second rectangular parallelepiped formed on one side of the lower part of the rectangular parallelepiped
The sorting unit grid plate 42 and the second sorting unit wire net 43 stretched on the second sorting unit grid plate 42. The second screening wire gauze 43 has a gentler slope than the second screening wire gauze 33 of the first embodiment. This gradient is substantially the same as that of the first selection section wire net 23, or is set to a steep angle (Θc ≧ Θa). In addition, water hits one side of the upper side of the rectangular shape of the box body 21 and the second selection unit wire net 33 below
An abutting plate 44 is fixedly installed to drop the contact plate. One side 51 of the rectangular parallelepiped lower portion of the glass chute 50 is continuously connected to the second selection part wire net 43 while being bent, and has a steep slope (about 15) with respect to the horizontal plane as in the first embodiment.
22 to 22 degrees).

Regarding the operation, the gradient of the second selection wire net 43 is gentle, but since it is almost the same as the above, detailed description will be omitted. Similar to the first embodiment, the step provided between the first selection unit wire net 23 and the second selection unit wire net 43 is dropped again to increase the momentum. A considerable amount of sediment water that increased this momentum,
The water, which falls on the second selection section wire net 43 of the gentle slope of the second selection section 40 and contains sand of a predetermined size or less, passes through,
Most of the sediment water falls on the lower collecting plate 116. In the second embodiment, the same sorting effect can be obtained by increasing the level difference by the amount by which the gradient of the second selection unit wire net 43 is made gentle.

[0025]

As described above, according to the present invention, when the sand and sand flow, the thrust of the water becomes strong and the sand is less likely to be clogged with the wire mesh. Is excavated and flows downstream, and less sediment water flows out of the ship. Even if sand is clogged in the wire mesh, the slope is gentle, so that water often flows through the wire mesh, and water containing sand of a certain size or less is discharged to the outside of the ship along with shellfish and stones. Less likely to be lost. Further, by reducing the mounting angle of the wire mesh relative to the horizontal angle, the size of the mesh projected on the horizontal plane becomes large, the apparent mesh size of the wire mesh becomes large, and sand easily passes. Further, since a plurality of places to drop are provided, an excellent effect that the above-described effect can be obtained at a plurality of places can be obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a first embodiment of a sand selecting device for a sand collecting ship according to the present invention.

FIG. 2 is a partial front view of FIG. 1 according to the present invention.

FIG. 3 is a side sectional view showing a second embodiment of the sand sorting device of the sand collecting ship according to the present invention.

FIG. 4 is a perspective view of a conventional sand sampling ship.

FIG. 5 is a plan view of a conventional sand selecting device for a sand collecting ship.

FIG. 6 is a side sectional view of a conventional sand selecting device for a sand collecting ship.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sand sorter, 10 ... Water entry part, 11 ... Box body, 12
... pipe body, 13 ... distribution plate, 20 ... first sorting unit, 21 ... first sorting unit box body, 22 ... first sorting unit lattice plate, 23 ... first sorting unit wire mesh, 24, 34, 44
... abutting plate, 25 ... shielding plate, 30, 40 ... second sorting section, 31 ... second sorting box, 32, 42 ... second sorting grid plate, 33, 43 ... second sorting wire mesh, 1
01 ... sand collecting boat, 102 ... hose, 103 ... sand collecting pipe, 104 ... sand pump, 110 ... chute, 1
50 ... Gala shoot.

Claims (6)

[Claims] 1. A sand sampling vessel for sampling sand from the bottom of the sea, river, lake, etc., a pumping apparatus for pumping water, sand, etc., which is arranged on the sand sampling vessel, and sand, stones, etc. from the pumping apparatus, In a sand selection device for a sand sampling ship that sorts sand from shellfish, etc. First sorting section and second sorting section for sorting into water containing sand of a certain amount and sand, shellfish, and stones of a predetermined size, first sorting section and second
A chute part that discharges water containing sand of a predetermined size or less from the sorting part to the sorting tank in the ship, and the sand, shellfish, and stones of a predetermined size or more from the second sorting part, and discharges it out of the ship. A sand sorting device for a sand sampling ship, which is characterized by comprising a glass chute. 2. A shield plate having an upper space between the water entry part and the first sorting part, and a contact for dropping water containing earth and sand flowing into the first sorting part from the water entry part toward the wire mesh. The sand sorting apparatus of the sand sampling ship according to claim 1, further comprising a plate. 3. The sand sorting apparatus for a sand collecting ship according to claim 1, wherein a step is provided between the first sorting section and the second sorting section. 4. A method for selecting sand in a sand sampling ship, in which water containing sand, shellfish, and stones is pumped from the bottom of the sea, river, lake, etc., and sand of a predetermined size or smaller is selected from the pumped water. A sand sorting method for a sand sampling ship, characterized by dropping sand to increase the speed and sort sand. 5. A method of sand selection for a sand sampling ship, in which water containing sand, shellfish, stones is pumped from the bottom of the sea, river, lake, etc., and sand of a predetermined size or less is selected from the pumped water. A sand sorting method for sand sampling vessels characterized by increasing the amount of sand to be sorted by passing water containing soil through a wire net with a small angle near the horizontal and increasing the apparent mesh size of the wire net. . 6. A method for selecting sand in a sand collecting ship, which comprises pumping water containing sand, shellfish, and stones from the bottom of the sea, river, lake, etc., and selecting sand of a predetermined size or less from the pumped water. Clear water 1
A sand sorting method for a sand-collecting ship, which comprises passing through a wire mesh of the first stage, dropping water containing soil and sand that has not been sorted in the first stage, and sorting with the second wire mesh.