JP6592740B1 - Sieve sorter - Google Patents

Abstract

The present invention provides a sieving and sorting device that prevents stones and earth and sand from being caught in sorting earth and sand and stones. A sieve sorting device for sorting earth, sand, stones, etc. is composed of a plurality of bar members arranged in the width direction with a gap through which an object to be sieved passes, and tilted in the extending direction of the bar member. The sieving portion 11 provided on the side, the transverse member 15 extending in the width direction so as to intersect with each of the plurality of bar members 13 on the lower side of the plurality of bar members 13, and each of the plurality of bar members 13 And a plurality of raised portions 16 each extending upward from the lateral member 15 to support the rod member 15 from below and separating the rod member 13 upward from the lateral member 15. [Selection] Figure 4

Description

  The present invention relates to a sieve sorting device for sorting earth and sand, stones and the like.

  2. Description of the Related Art Conventionally, a sieve sorting apparatus for sorting earth and sand, stones, and the like is known. Patent Document 1 describes a classifier as this type of device. This classifier sorter creates a rectangular parallelepiped frame and uses a horizontal partition frame to form at least two wide spaces, and reduces the size of the space from above to below. It is made up of two tiered sieve boxes and a vibration motor attached to the lower sieving box, and this is arranged as a unit of a unit at a fixed angle and obliquely. is there.

Registered Utility Model Publication No. 3058081

  By the way, in FIG. 3 of patent document 1, the mesh-shaped sieve part is described as a conventional sieve part. However, the mesh-shaped sieving part is easy to catch a stone on the horizontal member in the width direction when sorting sand and sand containing stones, and when a stone is caught on the transverse member, another stone or earth is easily caught on the stone. Become. Therefore, there is a possibility that it is necessary to remove the trapped stones and earth and sand.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a sieve sorting device in which stones and earth and sand are not easily caught in sorting earth and sand and stones.

  In order to solve the above-mentioned problem, the first invention is a sieve sorting device for sorting earth and sand, stones, etc., comprising a plurality of bar members arranged in the width direction with a gap through which an object to be sieved passes. A sieving portion provided to be inclined in the extending direction of the bar member, a lateral member extending in the width direction so as to intersect each of the plurality of bar members below the plurality of bar members, and a plurality of bar members And a plurality of raised portions, each of which is provided for each, extends upward from the horizontal member, supports the bar member from below, and separates the bar member upward from the horizontal member. is there.

  In a second aspect based on the first aspect, the raised portion has a size in the width direction of the sieve portion smaller than that of the bar member.

  A third invention is a sieve sorting device according to the first or second invention, wherein the sieve portion is the first sieve portion, and stones that are not sieved in the inclined direction are dropped, and the sieve size is smaller than that of the first sieve portion. The first sieving part is provided below the first sieving part, and the second sieving part is provided so as to incline in a direction substantially perpendicular to the inclination direction of the first sieving part, and the first sieving part does not pass through the sieves of the first sieving part. There were provided a first stacking unit in which stones rolled down on the part were collected, and a second stacking unit in which stones rolled down on the second sieve unit were collected without passing through the sieve mesh of the second sieve unit.

  In this invention, the raising part is provided with respect to each of the some bar member which comprises a sieve part, and each bar member is supported by the horizontal member via the raising part. Therefore, unlike the sieve part described in Patent Document 1, it is not necessary to make the sieve part a mesh. Furthermore, each bar member is spaced apart from the transverse member by the raised portion. Here, when there is no raised part and the horizontal member is in contact with the lower surface of each bar member, the stone rolling on the upper side of the sieving part may protrude downward from the gap between the bar members and be caught by the horizontal member. On the other hand, in the present invention, since the bar member is spaced upward with respect to the horizontal member, even if the stone rolling on the upper side of the sieving part protrudes downward slightly from the gap between the bar members, Absent. According to the present invention, it is possible to provide a sieve sorting device in which stones and earth and sand are not easily caught in sorting earth and sand.

FIG. 1 is a schematic configuration diagram (side view) of a sieve sorting device according to the present embodiment. FIG. 2 is a schematic configuration diagram (front view) of the sieve sorting device. FIG. 3 is a plan view of the sieve sorting device. Fig.4 (a) is a front view of a 1st sieve part, FIG.4 (b) is sectional drawing which cut | disconnected the 1st sieve part in the width direction. Fig.5 (a) is a front view of a 2nd sieve part, FIG.5 (b) is sectional drawing which cut | disconnected the 2nd sieve part in the width direction. FIG. 6 is a plan view of the sand cleaning apparatus. Fig.7 (a) is a top view of a rotation pool, FIG.7 (b) is AA sectional drawing of a rotation pool. FIG. 8 is a cross-sectional view of the cleaning water channel of the rotating pool cut in the circumferential direction. FIG. 9 is a view of the installation location of the gas supply unit on the inner wall as viewed from the outside. FIG. 10 is a cross-sectional view of the installation location of the gas supply unit in the rotating pool.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. The following embodiment is an example of the present invention, and is not intended to limit the scope of the present invention, its application, or its use.

  The earth and sand treatment system according to the present embodiment is a system including the sieve sorting device 10 according to the present invention. The earth and sand treatment system separates materials (stone, sand, mud) that can be used for construction from earth and sand collected from the riverbed, for example. The earth and sand treatment system includes a sieve sorting device 10 and a sand washing device 30 for washing sand contained in the earth and sand from which stones have been removed from the sieve sorting device 10.

[Configuration of sieve sorting device]
The sieve sorting apparatus 10 is an apparatus that separates stones larger than a predetermined size (for example, 9 mm) from earth and sand using a plurality of sieve parts 11 and 12 (in this embodiment, two sieve parts 11 and 12). It is. As shown in FIGS. 1 and 2, the sieve sorting device 10 includes a first sieve portion 11 and a second sieve portion 12 having a sieve size smaller than that of the first sieve portion 11. The 2nd sieve part 12 is arrange | positioned under the 1st sieve part 11 (just under).

  As for the 1st sieve part 11, the upper side is supported by the earth retaining wall 6, and the lower side is supported by the frame structure 5. FIG. The second sieving portion 12 is supported by the framework structure 5 on the upper side and supported by the concrete wall 7 on the lower side. Each of the 1st sieve part 11 and the 2nd sieve part 12 is provided in the state inclined diagonally. The inclination angle of each of the sieving portions 11 and 12 can be a value of 40 degrees or more and 60 degrees or less (for example, 45 degrees), but may be outside this numerical range.

  Further, as shown in FIG. 3, the sieve sorting device 10 includes a first accumulation unit 18 in which stones that have rolled down on the first sieve unit 11 without accumulating the sieves of the first sieve unit 11 accumulate, And a second accumulating portion 19 in which the stones rolled down on the second sieving portion 12 without passing through the sieving of the second sieving portion 12 are accumulated. In addition, in FIG. 3, each sieve part 11 and 12 is represented simply by mesh-like hatching.

  Each stacking part 18, 19 is a recess formed by digging the ground, and is constituted by a concrete side wall and a bottom plate. Each stacking part 18, 19 is formed in a rectangular shape in plan view. Each stacking part 18, 19 is formed outward from a position substantially directly below (or slightly outside) the lower end of the corresponding sieve part 11, 12. The width of each stacking part 18, 19 is the same as or slightly larger than the width of the corresponding sieve part 11, 12.

  Each of the stacking portions 18 and 19 is formed to have a size (for example, 6 m in length (a dimension in the width direction of the corresponding sieving portions 11 and 12), 5 m in width, and 2.5 m in depth) into which the backhoe grab enters. In the present embodiment, since the inclination direction of the first sieving part 11 and the inclination direction of the second sieving part 12 are substantially orthogonal to each other, the backhoe is provided in the region 21 facing the first accumulation part 18 and the second accumulation part 19. By installing it, it is possible to grab stones from both the accumulating portions 18 and 19 by simply turning the backhoe.

As shown in FIGS. 4 (a) and 5 (a) , each of the sieving portions 11 and 12 has a plurality of bar members 13 arranged in the width direction with a gap (sieving mesh) through which an object (sediment) to be sieved passes. , 23. The first sieving portion 11 is provided to be inclined in the extending direction of the rod members 13 and 23. A straight steel bar (for example, a steel bar having a circular cross section) can be used for each of the bar members 13 and 23. The diameter of each bar member 13 and 23 is 36 mm, for example. Moreover, the clearance gap (sieve) between the adjacent bar members 13 in the 1st sieve part 11 is 36 mm, for example. A gap (sieving mesh) between adjacent bar members 23 in the second sieving portion 12 is, for example, 9 mm, and stones cannot pass through.

  For the plurality of bar members 13 and 23, two vertical members 14 and 24, a plurality of horizontal members 15 and 25, and a plurality of raised portions 16 and 26 (spacers) are provided. Straight steel H can be used for the vertical members 14 and 24 and the horizontal members 15 and 25. The two vertical members 14 and 24 and the two horizontal members 15 and 25 form a frame (rectangular frame) of the sieve portions 11 and 12. Within this frame, the plurality of horizontal members 15 and 25 are arranged at a predetermined pitch in the extending direction (vertical direction) of the vertical members 14 and 24. Both ends of the horizontal members 15 and 25 are fixed to the left and right vertical members 14 and 24 in FIG. 4A or 5A, respectively. Each lateral member 15, 25 extends in the width direction so as to intersect with each rod member 13, 23 below the plurality of rod members 13, 23.

  Each raising part 16 and 26 is a member (member for raising) for separating the bar members 13 and 23 upward from the lateral members 15 and 25. A rectangular iron plate (for example, a flat plate) can be used for each of the raised portions 16 and 26, but a steel bar or the like can be used in addition to the iron plate. As shown in FIGS. 4 (b) and 5 (b), each raised portion 16, 26 is fixed at the lower end to the upper surface of the horizontal members 15, 25 and fixed at the upper end to the lower surface of the bar members 13, 23. Has been. The raised portions 16 and 26 extend upward from the lateral members 15 and 25 and support the rod members 13 and 23 from below.

  The raised portions 16 and 26 are provided at locations where the bar members 13 and 23 and the horizontal members 15 and 25 intersect, respectively. A plurality of raised portions 16 and 26 are provided for the respective bar members 13 and 23. In the present embodiment, the dimensions of the raised portions 16 and 26 are shorter than the dimensions of the rod members 13 and 23 when viewed in the width direction dimensions of the respective sieve portions 11 and 12. Specifically, the thickness of each raised portion 16, 26 is, for example, 8 mm, which is smaller than the diameter (36 mm) of the joined rod members 13, 23. Moreover, the height of each raising part 16 and 26 is preferably 25 mm or more, for example, and is 50 mm in this embodiment.

  A vibration device 20 is attached to each of the sieving portions 11 and 12. The vibration device 20 is attached to the upper surface of the bar member 13. In the present embodiment, one vibration device 20 is attached to the first sieve portion 11, and two vibration devices 20 are attached to the second sieve portion 12. However, the number of vibration devices 20 is not limited to this embodiment. In addition, a mesh curtain (not shown) made of a metal chain is provided above the first sieving portion 11 in order to reduce the speed of the stone falling from the truck bed. Therefore, it is possible to prevent the stone that has fallen from the first sieving portion 11 from exceeding the first accumulation portion 18.

[How to use the sieve sorter]
A method of using the sieve sorting device 10 will be described. Note that each vibration device 20 is operated while the sieve sorting device 10 is in use.

  The truck carrying the earth and sand collected from the riverbed is stopped at the position shown in FIGS. And if the loading platform of a truck is inclined, earth and sand will fall to the 1st sieve part 11 from a loading platform. Of the stones contained in the earth and sand that have fallen on the first sieving part 11, the stones that are larger than the sieving (36 mm) of the first sieving part 11 roll on the first sieving part 11 from the lower end of the first sieving part 11. Then, it falls to the first stacking unit 18. In the first accumulation unit 18, stones that are not sieved off by the first sieving unit 11 accumulate. Of the earth and sand that has fallen on the first sieve portion 11, stones and earth and sand that are smaller than the sieve mesh of the first sieve portion 11 fall to the second sieve portion 12 through the sieve mesh of the first sieve portion 11.

  As described above, stone cannot pass through the sieve mesh (9 mm) of the second sieve section 12. The stone contained in the earth and sand that has fallen on the second sieving part 12 rolls on the second sieving part 12 and falls on the second stacking part 19 from the lower end of the second sieving part 12. In the second accumulation unit 19, stones having a size smaller than that of the first accumulation unit 18 are accumulated. In addition, the earth and sand that has fallen on the second sieving part 12 passes through the sieving of the second sieving part 12 and accumulates on the concrete plate provided below the second sieving part 12.

  As described above, according to the sieve sorting device 10, stones that are not sieved off by the first sieve unit 11 and stones that are not sieved off by the second sieve unit 12 are sorted. Moreover, the earth and sand screened off by the both sieve parts 11 and 12 is also selected. In addition, this earth and sand is conveyed by a truck etc., and is thrown into the rotation pool 31 mentioned later.

  In the present embodiment, raised portions 16 and 26 are provided for each of the plurality of rod members 13 and 23 constituting the sieve portions 11 and 12, and the rod members 13 and 23 are made to be the transverse members 15 and 25 by the raised portion. Is spaced upward. For this reason, even if the stone rolling on the upper side of the respective sieving parts 11 and 12 slightly protrudes downward from the gap between the bar members 13 and 23, it is not caught by the lateral members 15 and 25. According to the present embodiment, it is possible to provide the sieve sorting device 10 in which stones and earth and sand are not easily caught in sorting earth and sand and stones.

[Configuration of sand cleaning device]
The sand cleaning device 30 is a device for cleaning sand contained in the earth and sand selected by the sieve sorting device 10. As shown in FIG. 6, the sand cleaning device 30 has a rotating pool 31 that flows the introduced earth and sand together with water, a water storage tank 32 that stores water supplied to the rotating pool 31, and water discharged from the rotating pool 31. And a filtration pool 33 for separating sand and the like by filtration. The water storage tank 32 stores water introduced from a river or a pond using a pump (not shown). The fresh water filtered by the filtration pool 33 is guided to a river (not shown).

  The rotating pool 31 includes an annular washing water channel 40 formed between the inner wall 34 and the outer wall 35, and a water flow generating unit 41 that generates a circumferential water flow in the washing water channel 40 by supplying water to the washing water channel 40. It has. The inner wall 34 and the outer wall 35 are both formed in a cylindrical shape and are arranged concentrically with each other. About the dimension of the washing water channel 40, it can be 3 m in height and 1.5 m in width, for example. The planar shape of the cleaning water channel 40 may be other than a circle (for example, an ellipse).

  Water supplied from the water storage tank 32 to the inner space 36 (circular pool) of the inner wall 34 is sucked and supplied to the cleaning water channel 40 by the water flow generation unit 41. Specifically, the inner space 36 of the inner wall 34 that partitions the cleaning water channel 40 from the inside is a storage pool 36 that stores water introduced from the outside. An inflow port 32 a is formed on the bottom surface of the water storage tank 32, and an outflow port 36 a is formed on the bottom surface of the storage pool 36. The inflow port 32a and the outflow port 36a are connected through a pipe line 37 provided below the ground. Therefore, the water level of the storage pool 36 is automatically adjusted to be the same height as the water level of the water storage tank 32. Accordingly, when water is supplied from the storage pool 36 to the cleaning water channel 40, water is also supplied from the water storage tank 32 to the storage pool 36.

  The water flow generation unit 41 includes a plurality of pumps 42 (eight pumps 42 in the present embodiment). As each pump 42, a submersible pump can be used. As shown in FIG. 7A, the plurality of pumps 42 are arranged at equiangular intervals on the bottom surface of the storage pool 36 so as to surround the outlet 36 a. In addition, description of the pump 42 is abbreviate | omitted in FIG.

  An inlet of a water supply pipe 43 is connected to the outlet of each pump 42. As shown in FIG. 7B, each water supply pipe 43 extends upward from the pump 42, is folded back above the inner wall 34, and extends to the vicinity of the bottom surface of the cleaning water channel 40. As shown in FIG. 7A, the discharge port of each water pipe 43 is directed in a direction orthogonal to the radial direction of the cleaning water channel 40, and water is discharged from each water pipe 43 in the direction of the arrow. The discharge ports of all the water supply pipes 43 are opened in the same direction in the circumferential direction of the cleaning water channel 40. In the washing channel 40, a counterclockwise water flow is generated in FIG.

  Further, the discharge port of each water supply pipe 43 is disposed near the center in the radial direction (width direction) of the cleaning water channel 40. For this reason, the flow velocity is ensured in a well-balanced manner inside and outside the cleaning water channel 40, and it is possible to suppress the occurrence of a region where the flow velocity is small. The number of discharge ports arranged in the cleaning water channel 40 and the number of pumps 42 are not limited to the present embodiment, and for example, one discharge port and one pump 42 may be provided.

  As shown in FIG. 8, the discharge port of each water pipe 43 is located near the bottom plate 31 a of the rotating pool 31. In addition, a step 31b (agitating protrusion) is formed as a winding part for winding up the earth and sand in the water flow in front of the outlet of the water pipe 43 in the bottom plate 31a of the rotating pool 31. The distance X from the discharge port of the water supply pipe 43 to the step 31b is, for example, 50 cm. In the present embodiment, every other step 31 b is provided with respect to the discharge ports of the eight water supply pipes 43 arranged in the circumferential direction of the cleaning water channel 40. That is, four steps 31b are provided. The number and arrangement of the steps 31b are not limited to the present embodiment. Moreover, the winding part 31b should just be a structure which produces the upward flow, and a protrusion etc. may be sufficient as it.

  As shown in FIG. 7A and FIG. 8, the outer wall 35 of the rotating pool 31 has a surface layer outflow portion that causes the surface layer portion of the water flow in the washing channel 40 (the portion including the mud that floats) to flow outside the outer wall 35. 46 is formed. The surface outflow portion 46 is a notch obtained by notching the outer wall 35 from the upper side, but may be a through hole. For example, the surface outflow portion 46 has a height of 20 cm and a width of 5 m. The surface layer outflow portion 46 is arranged so that water flows out between the water storage tank 32 and the filtration pool 33. Note that the surface layer portion of the water flow may be removed from the cleaning water channel 40 by a person or a machine without providing the surface layer outflow portion 46.

  In addition, as shown in FIGS. 9 and 10, the rotating pool 31 is provided with a gas supply unit 50 that sends air (bubbles) to the bottom of the cleaning water channel 40. The gas supply unit 50 is provided slightly upstream of the surface layer outflow unit 46 to allow dust (such as plastic dust) and foreign matters contained in the earth and sand to float on the surface layer. FIG. 9 is a view of the inner wall 34 as viewed from the outside, but the surface outflow portion 46 of the outer wall 35 corresponding to the same angular position is indicated by a broken line.

  The gas supply unit 50 includes an air pump 51, a nozzle 52 that opens to a lower portion of the inner wall 34 (for example, a position 10 cm above the bottom surface), and a connection pipe 53 that supplies discharge air of the air pump 51 to the nozzle 52. It has. In the present embodiment, the gas supply unit 50 includes four nozzles 52 arranged at equal intervals (for example, at intervals of 10 cm). When the air pump 51 supplies air to each nozzle 52 via the connection pipe 53, bubbles are released from the plurality of small holes of each nozzle 52. The most downstream nozzle 52 (the rightmost nozzle 52 in FIG. 9) is located 50 cm to 1 m upstream from the same angular position as the start position of the surface outflow portion 46 in the direction of the water flow, for example. The position of the nozzle 52 is also slightly before the step 31b (50 cm to 1 m upstream). As a result, dust and foreign substances flowing through the cleaning water channel 40 are lifted up by the bubbles ejected from the nozzles 52, and are also lifted up by the winding flow of the step 31b. The dust and foreign matters floating on the surface layer portion are discharged to the outside through the surface layer outflow portion 46 together with water (overflow water). The number of nozzles 52 is not limited to the present embodiment. Further, the nozzle 52 may be provided on the outer wall 35.

  The outer wall 35 of the rotating pool 31 is provided with a discharge port 44 for discharging all the water in the cleaning water channel 40 to the outside and a gate 45 for opening and closing the discharge port 44. The discharge port 44 is formed upward from the height of the bottom surface of the cleaning water channel 40. The gate 45 is a withdrawal type gate.

  The filtration pool 33 is partitioned into a plurality of water storage chambers 51 to 54. The filtration pool 33 is provided with a pump chamber 55 in which a pump (not shown) is arranged. Specifically, in the filtration pool 33, the water in the cleaning water channel 40 discharged from the discharge port 44 of the rotating pool 31 is sucked up from the first water storage chamber 51 by the pump of the first water storage chamber 51 and the pump chamber 55. The second water storage chamber 52 into which the received water flows, the third water storage chamber 53 into which the water in the second water storage chamber 52 flows in, and the fourth water storage chamber 54 into which the water in the third water storage chamber 53 flows in. Is formed. In the filtration pool 33, the depths of the water storage chambers 51 to 54 are substantially the same, and the area and volume of the water storage chambers 51 to 54 are larger toward the downstream side.

  Slits 58 and 59 that allow water to pass through the partition wall 56 that partitions the second water storage chamber 52 and the third water storage chamber 53 and the partition wall 57 that partitions the third water storage chamber 53 and the fourth water storage chamber 54. Is formed. Each of the slits 58 and 59 is closed with a net-like member that filters water passing therethrough. In the partition wall 56, a slit 58 is formed on the side away from the first water storage chamber 51. In the partition wall 57, a slit 59 is formed on the side away from the slit 58 of the partition wall 56. Sand and mud accumulate on the upstream side of the water storage chambers 52 to 54 adjacent to each other with the partition walls 56 and 57 interposed therebetween.

  In addition, the outer wall 60 of the fourth water storage chamber 54 is also formed with a slit 61 closed with a mesh member. In the outer wall 60 of the fourth water storage chamber 54, a slit 61 is formed on the side away from the slit 59 of the partition wall 57. The water filtered in the filtration pool 33 flows out from the slit 61.

[Usage of sand cleaning equipment]
A method of using the sand cleaning device 30 will be described. The earth and sand sorted by the sieve sorting device 10 is introduced into the washing water channel 40 from the position of each arrow in FIG. In addition, when throwing in earth and sand, the gate 45 is a closed state and each pump 42 has already started operation. That is, the earth and sand are introduced in a state where a water flow is generated in the cleaning water channel 40. The air pump 51 is also operated.

  In the washing water channel 40, when earth and sand are introduced, the earth and sand flow in the counterclockwise direction in FIG. Since the discharge outlet of each water pipe 43 is located in the vicinity of the bottom surface of the cleaning water channel 40, the earth and sand hardly accumulate in the vicinity of the bottom surface of the cleaning water channel 40, and most of the soil is washed away by the water flow. Moreover, the earth and sand flowing near the bottom surface of the washing water channel 40 is wound up by the step 31b. Therefore, in the washing water channel 40, it is stirred by the flow wound up by the step 31b, and the earth and sand are washed effectively.

  Further, in the washing channel 40, the water level is set so that the water surface reaches near the lower end height of the surface outflow portion 46. Here, fine particles such as silt are floated on the surface layer while earth and sand are flowing in the washing channel 40. Then, the surface layer portion of the water flow in the cleaning water channel 40 flows out from the surface layer outflow portion 46 and is removed from the cleaning water channel 40. Therefore, with the passage of time, the water in the washing channel 40 is gradually purified, and the sand is washed. Then, the gate 45 is pulled up to an open state on the assumption that the sand cleaning is completed at the timing when it is determined that the water is sufficiently clear by visual inspection.

  Then, the water in the cleaning water channel 40 flows into the first water storage chamber 51 of the filtration pool 33 through the discharge port 44. At this time, the operation of each pump 42 is continued. Therefore, most of the sand in the cleaning water channel 40 is pushed away from the cleaning water channel 40 to the first water storage chamber 51. In the first water storage chamber 51, sand cleaned by the cleaning water channel 40 is accumulated.

  In the filtration pool 33, the pump in the pump chamber 55 sucks the water in the first water storage chamber 51 and discharges it to the second water storage chamber 52. In the 1st water storage chamber 51, water will almost be lost and it will be in the state where sand accumulated.

  The water discharged into the second water storage chamber 52 is filtered by a mesh member provided in the slit 58 of the partition wall 56 and flows into the third water storage chamber 53. In the second water storage chamber 52, sand or mud having a finer particle shape than the first water storage chamber 51 is accumulated.

  Further, the water flowing into the third water storage chamber 53 is filtered by a mesh member provided in the slit 59 of the partition wall 57 and flows into the fourth water storage chamber 54. In the third water storage chamber 53, sand or mud having a finer particle shape than the second water storage chamber 52 is accumulated.

  The water that has flowed into the fourth water storage chamber 54 is filtered by a mesh member provided in the slit 61 of the outer wall 60 and flows into a river that flows nearby. In the fourth water storage chamber 54, mud having a finer particle shape than the third water storage chamber 53 is accumulated. In the present embodiment, the sand is washed in the rotating pool 31 as described above, and sand and mud are sorted in each of the water storage chambers 51 to 54 according to the particle shape. The selected sand and mud are crushed and used by heavy machinery.

  The present invention is applicable to a sieve sorting device for sorting earth and sand, stones and the like.

DESCRIPTION OF SYMBOLS 10 Sieve sorting device 11 1st sieve part 12 2nd sieve part 13 Bar member 14 Vertical member 15 Horizontal member 16 Raised part

Claims (3)

A sieve sorting device for sorting earth and sand, stones, etc.
A first sieve comprising a plurality of bar members arranged in the width direction with a gap through which an object to be sieved passes, which is inclined in the extending direction of the bar member and drops stones that do not pass through the inclined direction. And
A transverse member extending in the width direction so as to intersect with each of the plurality of rod members on the lower side of the plurality of rod members;
A plurality of raised portions provided for each of the plurality of bar members, each extending upward from the horizontal member to support the bar member from below, and separating the bar member upward from the horizontal member With
A second sieve portion having a sieve mesh smaller than the first sieve portion, provided below the first sieve portion;
A first stacking unit in which the stones rolled down on the first sieve unit without passing through the sieve of the first screen unit are collected;
A sieve sorting device , further comprising: a second accumulation unit that accumulates stones that have rolled down on the second sieve unit without passing through the sieves of the second sieve unit . 2. The sieve sorting device according to claim 1 , wherein the raised portion has a width dimension of the first sieve portion smaller than that of the bar member. The second sieve portion, the The inclination direction of the first sieve portion is inclined in a direction substantially orthogonal, sieving apparatus according to claim 1 or 2.

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