Dust removal 3D screen

Abstract

To secure a higher level of water permeability while appropriately capturing impurities in flowing water.SOLUTION: A three-dimensional screen S1 for dust removal comprises: a screen main body 2 having a plurality of water passages 3 respectively penetrating in a thickness direction; and a partition wall 4b protruding toward an upstream side from an upstream side surface U2 of the screen main body 2, extending along the upstream side surface U2, and partitioning inflow ports 3a of the plurality of water passages 3 into sections having the plurality of inflow ports.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a three-dimensional screen for dust removal used in a dust removal device that separates impurities (screen residue, garbage) from flowing water such as discharged water from rivers and reservoirs and inflow water in sewerage facilities. [Background technology]

[0002] A dust collector is known that uses an endless porous screen to capture impurities in flowing water and then rotates the porous screen to remove them. Conventionally, the porous screen used in this type of dust collector has mainly been a flat screen, such as a wire mesh, with a flat filtering surface (capturing surface) for filtering impurities.

[0003] However, flat screens have the problem that vinyl sheets or plastic plates tend to stick to the filtration surface, impairing water permeability in a short period of time. To address this problem, the applicant of the present application has developed and proposed a three-dimensional screen as a porous screen that solves this problem. This screen has protruding water pipes that protrude upstream from the filtration surface, creating a height difference between adjacent protruding water pipes (Patent Document 1). With this three-dimensional screen, even if vinyl sheets or the like stick to the filtration surface, they straddle the protruding water pipes (a bridging phenomenon), preventing the water passage (water passage holes) from being completely blocked. As a result, water permeability is more easily maintained. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4444913 Summary of the Invention [Problem to be solved by the invention]

[0005] Although the three-dimensional screen of Patent Document 1 has the advantage of making the water passages less likely to become clogged, as mentioned above, linear impurities such as hair, thread, and string can become entangled (wrapped) around the protruding water pipes, and for example, linear impurities entangled around a protruding water pipe with a higher elevation difference can block the water passage holes of an adjacent protruding water pipe with a lower elevation difference. Therefore, there is still room for improvement in terms of maintaining the water permeability of the porous screen over the long term.

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide a dust-removing three-dimensional screen that can properly capture impurities in flowing water while ensuring a higher degree of water permeability. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, a three-dimensional dust-removing screen according to one aspect of the present invention is a three-dimensional dust-removing screen that captures impurities in flowing water while allowing flowing water to pass through in a thickness direction, the three-dimensional dust-removing screen comprising: a screen main body having a plurality of water passages each penetrating in the thickness direction; and partitions that protrude from an upstream side surface of the screen main body toward the upstream side and are arranged along the upstream side surface, and that separate the inlets of the plurality of water passages into a plurality of inlets. 、 Equipped with In a plan view from the upstream side, the upstream side surface is provided with a plurality of rows of inlets, each row having a plurality of the inlets lined up in a line, in a direction intersecting the direction in which the inlets are lined up, and the partition portion is a partition wall extending continuously along the upstream side surface, and a plurality of partition walls are provided so as to separate the rows of inlets into one or more rows, and among the plurality of partition walls, adjacent partition walls have different heights, which are the protrusion dimensions of the partition wall from the upstream side surface. It is characterized by:

[0008] According to the configuration of this dust-removing three-dimensional screen, because the partitions protrude from the upstream side of the screen main body, sheet-like or plate-like impurities are captured across the partitions. This prevents the impurities from clinging to the upstream side of the screen main body and blocking the inlets of the water passages. Moreover, because the partitions are arranged to separate the upstream inlets of the multiple water passages, linear impurities are less likely to become entangled. Therefore, this dust-removing three-dimensional screen can properly capture impurities in flowing water while ensuring a high level of water permeability.

[0009] AlsoThe partition portion is a partition wall that extends continuously along the upstream side surface. that's why, This effectively prevents sheet-like or plate-like impurities from sticking to the upstream side surface, and also eliminates the possibility of linear impurities becoming entangled. In addition, the simple configuration in which partition walls are provided to separate the rows of inlets into multiple rows suppresses or prevents sheet-like or plate-like impurities from blocking the inlets and linear impurities from becoming entangled. Furthermore, since adjacent partition walls among the plurality of partition walls have different heights, which is the dimension by which the partition walls protrude from the upstream side, gaps are likely to form between the impurities and the partition walls, even in the case of sheet-like or plate-like impurities, and running water can easily flow into the water passage through these gaps, which is advantageous in ensuring water permeability.

[0014] Furthermore, in the above-mentioned dust-removing three-dimensional screen, when the partition wall is defined as a first partition wall, the screen may be provided with a plurality of second partition walls that extend in a direction intersecting the first partition wall and intersect with the first partition wall at different positions in the longitudinal direction of the first partition wall.

[0015] With this configuration, the inlets of the multiple water passages are partitioned into fewer sections, making them less likely to be blocked by sheet-like or plate-like impurities. Furthermore, the partition walls are lattice-shaped, which increases their strength, making it advantageous for enhancing the durability of the dust-removing three-dimensional screen.

[0016] Also, A three-dimensional dust-removing screen according to another aspect of the present invention is a three-dimensional dust-removing screen that captures impurities in flowing water while allowing flowing water to pass through in a thickness direction, and includes a screen main body having a plurality of water passages each penetrating in the thickness direction, and partitions that protrude from an upstream side surface of the screen main body toward the upstream side and are arranged along the upstream side surface to separate the inlets of the plurality of water passages into multiple inlets, and in a plan view from the upstream side, the upstream side surface is provided with a plurality of rows of inlets, each row of the inlets being arranged in a direction intersecting the direction in which the inlets are arranged, and the partitions are partition walls that extend continuously along the upstream side surface and are provided in plurality so as to separate the rows of inlets into one to multiple rows, When the partition wall is defined as a first partition wall, the second partition wall extends in a direction intersecting the first partition wall and intersects with the first partition wall at different positions in the longitudinal direction of the first partition wall, and the height of the first partition wall, which is a protrusion dimension of the first partition wall from the upstream side surface, and the height of the second partition wall are different from each other. It is characterized by the fact that

[0017] With this configuration, even in the case of sheet-like or plate-like debris, gaps tend to form between the debris and the partition wall, allowing running water to easily flow into the water passage through the gaps, which is advantageous in ensuring water permeability.

[0018] In addition, a three-dimensional dust-removing screen according to another aspect of the present invention is a three-dimensional dust-removing screen that captures impurities in flowing water while allowing flowing water to pass through in a thickness direction, and includes a screen main body having a plurality of water passages each penetrating in the thickness direction, and partitions that protrude from an upstream side surface of the screen main body toward the upstream side and are arranged along the upstream side surface, and that separate the inlets of the plurality of water passages into a plurality of inlets, The partitions are dome-shaped protrusions arranged intermittently along the upstream side surface. It is characterized by the fact that

[0019] In the case of such a dome-shaped protrusion, it is also possible to effectively prevent sheet-like or plate-like impurities from sticking to the upstream side surface, and it is also possible to prevent linear impurities from becoming entangled.

[0020] Furthermore, when the above-mentioned dust-removing three-dimensional screen is to be incorporated into a specified frame member of a dust-removal device, the dust-removing three-dimensional screen may be configured so that the screen main body and the partition portion are separate, and the screen main body and the partition portion are incorporated into the frame member in a state where they are overlapped on top of each other.

[0021] This configuration can be advantageous in terms of production, as the screen main body and the partition can be manufactured separately, and is also convenient in terms of maintenance, as it allows only the screen main body or the partition to be replaced depending on the degree of deterioration or damage. [Effects of the Invention]

[0022] As described above, the dust-removing three-dimensional screen of the present invention can adequately capture impurities in flowing water while ensuring a high degree of water permeability. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view of a dust removal device equipped with a dust removal three-dimensional screen according to the present invention. [Figure 2] 2 is a schematic plan cross-sectional view of the dust removal device. [Figure 3] FIG. 2 is a plan view of a main part of the dust removing three-dimensional screen (first embodiment). [Figure 4] FIG. 4 is a partially enlarged view of FIG. 3 showing the dust-removing three-dimensional screen. [Figure 5] 5 is a cross-sectional view of the dust-removing three-dimensional screen (a cross-sectional view taken along line VV in FIG. 4). [Figure 6] 6 is a cross-sectional view of the dust-removing three-dimensional screen (a cross-sectional view taken along line VI-VI in FIG. 4). [Figure 7] FIG. 10 is a plan view of the main part of the dust removing three-dimensional screen according to the second embodiment. [Figure 8] 8 is a cross-sectional view of the dust-removing three-dimensional screen (a cross-sectional view taken along line VIII-VIII in FIG. 7). [Figure 9]FIG. 10 is a cross-sectional view of a dust removing three-dimensional screen according to a modified example of the second embodiment. [Figure 10] FIG. 10 is a cross-sectional view of a dust removing three-dimensional screen according to a modified example of the second embodiment. [Figure 11] FIG. 10 is a plan view of a main part of a dust screen according to a third embodiment. [Figure 12] 12 is a cross-sectional view of the dust-removing three-dimensional screen (cross-sectional view taken along line XII-XII in FIG. 11). DETAILED DESCRIPTION OF THE INVENTION

[0024] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] [Dust removal equipment configuration] Fig. 1 is a perspective view showing a dust removal device 10 to which a dust removal three-dimensional screen S1 according to the present invention (hereinafter abbreviated as three-dimensional screen S1) is applied, and Fig. 2 is a schematic plan view of the dust removal device 10. Fig. 3 is a plan view of the main part of the three-dimensional screen S1 (a plan view of the dust removal screen 1 as seen from the inner peripheral side). Fig. 1 shows the dust removal device 10 with a part broken away.

[0026] 1 and 2, a dust removal device 10 includes a dust removal screen 1 for capturing impurities in flowing water through a water channel 11, a drive mechanism for driving the dust removal screen 1, and a removal device 14 for dropping and collecting the captured impurities from the dust removal screen 1. A three-dimensional screen S1 according to the present invention is incorporated into the dust removal screen 1.

[0027] The dust removal screen 1 is formed in the shape of an endless belt so as to penetrate the waterway 11 in the longitudinal direction. The dust removal screen 1 is provided vertically between a partition wall 12 protruding into the waterway 11 and an intermediate support wall 13 erected in the center of the waterway 11 downstream of the partition wall 12, with its upper portion exposed above the water surface, and is configured to rotate when the drive mechanism is operated.

[0028] More specifically, guides 20 for guiding the dust removal screen 1 are disposed on the partition walls 12 and the intermediate support walls 13, and a rotor 22 having a pair of sprockets 23 is supported above these guides 20. The dust removal screen 1 is stretched across these rotors 22 and guides 20, and a chain 30 (described later) of the dust removal screen 1 meshes with each of the sprockets 23. A motor 25 is disposed beside the rotor 22, and a drive chain 28 is stretched between a sprocket 26 attached to the output shaft of the motor 25 and a sprocket 27 attached to the rotating shaft of the rotor 22. In other words, when the rotor 22 is rotationally driven by the motor 25, the dust removal screen 1 rotates and moves in accordance with the rotation of the rotor 22.

[0029] As shown in Figure 3, the dust removal screen 1 comprises a pair of parallel endless chains 30 (only one side is shown in the figure), a plurality of frames 34 (frame members) connected to both chains 30 and aligned in a circumferential direction between the chains 30, and a three-dimensional screen S1 detachably attached to each frame 34 with bolts and nuts. In the dust removal screen 1, adjacent frames 34 in the circumferential direction are connected to each other via connecting members (not shown), made of rubber, for example. With this configuration, the frames 34 are connected endlessly without any gaps while maintaining flexibility.

[0030] As shown in FIG. 1, the removal device 14 has a spray device 40 disposed directly above the rotor 22 and a trough 42 disposed inside the dust removal screen 1 opposite the spray device 40.

[0031] The spray device 40 is configured to pump up flowing water using, for example, a pump installed at the bottom of the waterway and spray water at high pressure toward the dust removal screen 1, causing the trapped impurities to fall off under the water pressure. The trough 42 is located below the dust removal screen 1, sandwiching the spray device 40 between them, and is configured to capture the impurities that fall off the dust removal screen 1 under the water pressure and guide them to a collection box 44.

[0032] In the dust removal device 10 as described above, the flowing water in the water channel 11 is guided to the inside of the dust removal screen through the opening 12a of the partition wall 12 as shown by the outline arrows in Figures 1 and 2, and flows downstream along the circumferential surface of the dust removal screen 1. Therefore, as the flowing water passes through the inner circumferential surface of the dust removal screen 1, impurities in the flowing water are captured.

[0033] While the impurities are being captured in this manner, the dust removal screen 1 is rotated by the driving force of the motor 25. As the dust removal screen 1 rotates, the captured impurities are pulled up from the water and carried to the upper end of the screen (the position of the rotor 22). Then, high-pressure water is sprayed by the spray device 40, removing the impurities from the dust removal screen 1 and collecting them in the trough 42. The water flow from the spray device 40 guides the collected impurities along the trough 42 to a collection box 44, from which they are carried out of the waterway by an operator.

[0034] [Structure and Effects of the Three-Dimensional Screen S1 (First Embodiment)] Next, we will explain the detailed structure of the three-dimensional screen S1 that is applied to the dust removal screen 1. Figure 4 is an enlarged view of the main part of Figure 3, showing the three-dimensional screen S1. Figures 5 and 6 are cross-sectional views of the three-dimensional screen S1, with Figure 5 being a cross-sectional view taken along line VV in Figure 4 and Figure 6 being a cross-sectional view taken along line VI-VI in Figure 4.

[0035] 3 to 6, the three-dimensional screen S1 is a generally flat rectangular plate that is elongated in the horizontal direction when viewed from above. As described above, the three-dimensional screen S1 is attached to the frame 34 of the dust screen 1, and captures impurities in the flowing water while allowing the flowing water to pass through in the thickness direction.

[0036] The three-dimensional screen S1 has a screen main body 2 equipped with a plurality of water passages 3 that each penetrate through the screen main body in the thickness direction. The water passages 3 are straight holes with a circular cross section, and the screen main body 2 is provided with a plurality of water passages 3 aligned at regular intervals both vertically and horizontally. The water passages 3 are provided over substantially the entire surface of the screen main body 2.

[0037] As described above, the water passages 3 in this example are straight holes, i.e., holes with a constant inner diameter throughout the thickness direction of the screen main body 2, but they may also be tapered holes whose inner diameter gradually increases from the upstream side surface U2 toward the downstream side surface D2 of the screen main body 2. Note that "upstream" and "downstream" refer to the flow direction of running water passing through the three-dimensional screen S1.

[0038] A wall portion 4 is further provided on the upstream side surface U2 of the screen main body 2, protruding upstream from the upstream side surface U2 and extending along the upstream side surface U2. In the three-dimensional screen S1, the screen main body 2 and the wall portion 4 are integrally molded from the same synthetic resin material (for example, polypropylene).

[0039] The wall portion 4 includes a peripheral wall 4a and multiple partition walls 4b. The peripheral wall 4a is a rectangular wall in plan view that surrounds the inlets 3a of the multiple water passages 3 from the outside and is provided along the periphery of the screen main body portion 2. The multiple partition walls 4b (an example of a "partition portion" in the present invention) are provided inside the peripheral wall 4a. These multiple partition walls 4b each extend horizontally and are provided parallel to each other at regular intervals in the up-down direction (vertical direction). More specifically, as shown in Figures 3 and 4, the partition walls 4b are provided so as to separate every two rows of the inlets 3a of the water passages 3 that are aligned horizontally. In other words, the partition walls 4b separate every two inlets 3a of the multiple water passages 3.

[0040] In this example, the partition walls 4b are provided so as to separate every two rows of the inlets 3a arranged in a horizontal line (horizontal rows), but they may be provided so as to separate every row or every three or more rows.Furthermore, the partition walls 4b may be provided so as to separate every one or more rows of the inlets 3a arranged in a vertical line (vertical rows).

[0041] The height h (see FIG. 6) of the wall portions 4 (periphery wall 4a and partition walls 4b), i.e., the protrusion dimension from the upstream side surface U2, is constant, and therefore the tip surfaces of the wall portions 4 are parallel to the upstream side surface U2. In addition, both longitudinal ends of each partition wall 4b are integrally connected to the peripheral wall 4a.

[0042] The three-dimensional screen S1 has a three-dimensional structure in which partition walls 4b are provided on the upstream side U2 of the screen main body 2, separating every two rows of the inlets 3a of the water passage 3, which are aligned horizontally in a row. This causes the trapped impurities to bridge across the partition walls 4b, and the flowing water passes through the gaps and flows into the water passage 3. This prevents impurities from sticking to the upstream side U2 and blocking the inlets 3a of the water passage 3, as in the conventional three-dimensional screen (Patent Document 1).

[0043] Furthermore, because the partition walls 4b extend horizontally to separate the rows (horizontal rows) of inlets 3a, linear impurities such as hair, thread, and string do not become entangled in the partition walls 4b. Therefore, unlike conventional 3D screens, linear impurities do not become entangled in the protruding water pipes and block the surrounding water passages (inlets 3a). Therefore, the 3D screen S1 described above can properly capture impurities in the flowing water while ensuring a high degree of water permeability.

[0044] As shown in FIGS. 5 and 6, the peripheral wall 4a and the partition wall 4b of the three-dimensional screen S1 have the same height h. However, the peripheral wall 4a and the partition wall 4b may have different heights. Adjacent partition walls 4b may also have different heights. Specifically, adjacent partition walls 4b may have alternating heights. This configuration of partially varying heights for the wall 4 facilitates the formation of gaps between impurities, such as vinyl sheets or plastic boards, and allows running water to easily flow into the water passage 3. This is advantageous for ensuring the water permeability of the three-dimensional screen S1.

[0045] [Second embodiment of the 3D screen] FIG. 7 is a plan view of the main part of the three-dimensional screen S2 according to the second embodiment, and FIG. 8 is a cross-sectional view of the three-dimensional screen S2 (cross-sectional view taken along line VIII-VIII in FIG. 8).

[0046] The three-dimensional screen S2 of the second embodiment differs from the three-dimensional screen S1 of the first embodiment in the structure of the wall portion 4. That is, as shown in Figures 7 and 8, the wall portion 4 of the second embodiment includes, in addition to a plurality of partition walls 4b (referred to as first partition walls 4b) extending in the horizontal direction, a plurality of partition walls 4c (referred to as second partition walls 4c) extending in the vertical direction and intersecting the first partition walls 4b.

[0047] As in the first embodiment, the multiple first partition walls 4b are provided to separate every two rows of inlets 3a of the water passage 3 that are aligned horizontally (horizontal rows). The multiple second partition walls 4c each extend vertically (perpendicular to the first partition walls 4b) and are provided parallel to each other at regular intervals in the horizontal direction. More specifically, as shown in Figure 7, they are provided to separate every two rows of inlets 3a of the water passage 3 that are aligned vertically (vertical rows).

[0048] As a result, in the three-dimensional screen S2 of the second embodiment, the inlets 3a of the water passages 3 provided in the screen main body 2 are divided into four groups by the partition walls 4b and 4c. Note that both longitudinal ends of the second partition wall 4c are integrally connected to the peripheral wall 4a, and the first partition wall 4b and the second partition wall 4c are integrally connected at their intersections.

[0049] According to the structure of the three-dimensional screen S2 of the second embodiment described above, the inlets 3a of the multiple water passages 3 are divided into a smaller number (four inlets 3a). This makes it difficult for impurities such as vinyl sheets or plastic plates to get between adjacent partition walls, further reducing the likelihood of the water passages 3 (inlets 3a) being blocked by impurities. Furthermore, because the first partition wall 4b extends horizontally and the second partition wall 4c extends vertically, linear impurities do not become entangled with the partition walls 4b and 4c, as in the first embodiment. Furthermore, the partition walls 4b and 4c generally form a lattice pattern, which increases the strength of the partition walls 4b and 4c. This is also advantageous in terms of increasing the durability of the three-dimensional screen S2.

[0050] As shown in FIG. 8, the peripheral wall 4a and the partition walls 4b and 4c of the three-dimensional screen S2 have the same height h. However, the peripheral wall 4a and the partition walls 4b and 4c may have different heights. As shown in FIG. 9, the first partition wall 4b and the second partition wall 4c may have different heights. Furthermore, adjacent first partition walls 4b may have different heights, and / or adjacent second partition walls 4c may have different heights. Specifically, as shown in FIG. 10, adjacent second partition walls 4c may have different heights. As described in the first embodiment, this configuration in which the heights of the wall portions 4 are partially different facilitates the formation of gaps between impurities, such as vinyl sheets or plastic plates, and allows running water to easily flow into the water passage 3. This configuration is advantageous in ensuring the water permeability of the three-dimensional screen S2. 9 and 10 are cross-sectional views of the three-dimensional screen S2 corresponding to FIG.

[0051] 7 to 10, first partition walls 4b are provided to separate rows (horizontal rows) of inlets 3a arranged in a horizontal line into two rows, and second partition walls 4c are provided to separate rows (columns) of inlets 3a of water passages 3 arranged in a vertical line into two rows. However, as long as the inlets 3a can be separated into multiple rows, the number of rows (horizontal rows) of inlets 3a separated by first partition walls 4b and the number of rows (columns) of inlets 3a separated by second partition walls are not limited to those in the examples of FIGS. 7 to 10.

[0052] [Third embodiment of the 3D screen] FIG. 11 is a plan view of the main part of the three-dimensional screen S3 according to the third embodiment, and FIG. 12 is a cross-sectional view of the three-dimensional screen S3 (cross-sectional view taken along line XII-XII in FIG. 11).

[0053] The three-dimensional screen S2 of the third embodiment has a hemispherical dome-shaped protrusion 5 (an example of the "partition" of the present invention) provided on the upstream side surface U2 instead of the wall portion 4 (perimeter wall 4a, partition walls 4b, 4c), and in this respect, the three-dimensional screen S2 differs in structure from the three-dimensional screens S1, S2 of the first and second embodiments. That is, in the three-dimensional screen S3 of the third embodiment, instead of the first partition wall 4b of the three-dimensional screen S2 of the second embodiment, a plurality of dome-shaped protrusions 5 are provided intermittently at regular intervals in the horizontal direction along the position where the first partition wall 4b is provided, and also instead of the second partition wall 4c, a plurality of dome-shaped protrusions 5 are provided intermittently at regular intervals in the vertical direction along the position where the second partition wall 4c is provided.

[0054] As a result, in the three-dimensional screen S3 of the third embodiment, the inlets 3a of the multiple water channels 3 provided in the screen main body 2 are separated into groups of four by multiple dome-shaped protrusions 5 arranged horizontally and multiple dome-shaped protrusions 5 arranged vertically.

[0055] According to the structure of the three-dimensional screen S3 of the third embodiment as described above, the dome-shaped protrusions 5 are arranged intermittently, creating a three-dimensional structure in which every four inlets 3a of the water passage 3 are provided, so that the trapped impurities cause a bridge phenomenon across the dome-shaped protrusions 5, and the flowing water flows through the gaps into the water passage 3. Therefore, as with the conventional three-dimensional screen (Patent Document 1), impurities are prevented from sticking to the upstream side surface U2 and blocking the inlets 3a of the water passage 3.

[0056] Furthermore, the dome-shaped protrusions 5 are hemispherical and therefore less susceptible to entanglement of linear impurities, making it less likely that linear impurities will become entangled and block the surrounding water passage (inlet 3a) as occurs with conventional three-dimensional screens. Therefore, the three-dimensional screen S3 of the third embodiment can also ensure a higher degree of water permeability while properly capturing impurities in flowing water.

[0057] [Modifications, etc.] The above describes the three-dimensional screens S1 to S3 of the first to third embodiments of the present invention, but the three-dimensional screens S1 to S3 described above are merely examples of preferred embodiments of the present invention, and their specific configurations can be modified as appropriate within the scope of the present invention.

[0058] For example, although the three-dimensional screens S1 and S2 of the first and second embodiments have the wall portion 4 provided with the peripheral wall 4a, the peripheral wall 4a may be omitted. In this case, the three-dimensional screen S1 of the first embodiment may have reinforcing portions such as ribs provided on the partition wall 4b to maintain the strength of the partition wall 4b. Furthermore, the shapes and heights h of the wall portions 4 (perimeter wall 4a, partition walls 4b, 4c) of the three-dimensional screens S1 and S2 of the first and second embodiments shown in FIGS. 4 to 10 are merely examples and are not limited thereto and can be modified as appropriate.

[0059] The arrangement of the dome-shaped protrusions 5 in the three-dimensional screen S3 of the third embodiment can also be changed as appropriate. For example, a configuration may be adopted in which only a plurality of dome-shaped protrusions 5 arranged in a row in the horizontal direction are provided, thereby dividing a row of inlets 3a arranged in a row in the horizontal direction (horizontal row) into one or more rows. Alternatively, a configuration may be adopted in which only a plurality of dome-shaped protrusions 5 arranged in a row in the vertical direction are provided, thereby dividing a row of inlets 3a arranged in a row in the vertical direction (vertical row) into one or more rows. Furthermore, the dome-shaped protrusions 5 may be arranged in an arrangement other than such an orderly arrangement in the vertical or horizontal direction, as long as they can divide the inlets 3a into multiple units.

[0060] Furthermore, in the three-dimensional screens S1 and S2 of the first and second embodiments, the screen main body 2 and the wall portions 4 are integrally molded from a synthetic resin material, but they may also be constructed separately. In this case, for example, either or both of the screen main body 2 and the wall portions 4 may be made of metal. Furthermore, the screen main body 2 and the wall portions 4 may also be molded separately from the same resin material or different resin materials. When the screen main body 2 and the wall portions 4 are constructed separately in this way, the screen main body 2 and the wall portions 4 can be fixed to each other by fixing means such as adhesive, screwing, or welding.

[0061] In this case, the fixing means may be the frame 34. In other words, the screen main body 2 and the wall portions 4 may be stacked as a set and incorporated into the frame 34, so that they are used in a substantially integrated state. This configuration is advantageous in terms of production of the three-dimensional screens S1, S2 because the screen main body 2 and the wall portions 4 can be manufactured separately, and is also convenient in terms of maintenance, such as by replacing only either the screen main body 2 or the wall portions 4 depending on the degree of deterioration or damage.

[0062] Furthermore, in the three-dimensional screens S1 to S3 of the first to third embodiments, the water passage 3 has a circular cross section, but it may have a polygonal cross section (such as a square, rectangle, or regular hexagon). [Explanation of symbols]

[0063] 1 Dust removal screen 2 Screen body 3 Waterway 3a Inlet 4 Wall 4a Peripheral wall 4b Partition wall / First partition wall (partition) 4c Second partition wall (partition) 5 Dome-shaped protrusion (partition) S1, S2, S3 3D screens (dust removal 3D screens)

Claims

1. A three-dimensional dust-removing screen that captures impurities in flowing water while allowing flowing water to pass through in the thickness direction, a screen main body portion having a plurality of water passages each penetrating in the thickness direction; a partition portion that protrudes from the upstream side surface of the screen main body toward the upstream side and is arranged along the upstream side surface, and separates the inlets of the plurality of water channels into a plurality of inlets, In a plan view from the upstream side, a plurality of rows of inlets, each row including a plurality of the inlets arranged in a line, are provided on the upstream side surface in a direction intersecting the arrangement direction of the inlets, the partition portion is a partition wall extending continuously along the upstream side surface, and a plurality of partition portions are provided so as to separate the rows of the inlets into one or more rows, The dust-removing three-dimensional screen is characterized in that, among the plurality of partition walls, adjacent partition walls have different heights, which are the dimensions by which the partition walls protrude from the upstream side surface.

2. The dust-removing three-dimensional screen according to claim 1, When the partition wall is defined as a first partition wall, the dust-removing three-dimensional screen is provided with a plurality of second partition walls that extend in a direction intersecting the first partition wall and intersect with the first partition wall at different positions in the longitudinal direction of the first partition wall.

3. A three-dimensional screen for dust removal that captures impurities in flowing water while allowing flowing water to pass through in the thickness direction, a screen main body portion having a plurality of water passages each penetrating in the thickness direction; a partition portion that protrudes from the upstream side surface of the screen main body toward the upstream side and is arranged along the upstream side surface, and separates the inlets of the plurality of water channels into a plurality of inlets, In a plan view from the upstream side, a plurality of rows of inlets, each row including a plurality of the inlets arranged in a line, are provided on the upstream side surface in a direction intersecting the arrangement direction of the inlets, the partition portion is a partition wall extending continuously along the upstream side surface, and a plurality of partition portions are provided so as to separate the rows of the inlets into one or more rows, When the partition wall is defined as a first partition wall, the second partition wall extends in a direction intersecting the first partition wall and intersects with the first partition wall at different positions in the longitudinal direction of the first partition wall, A dust-removing three-dimensional screen, characterized in that a protruding dimension of the first partition wall from the upstream side surface, that is, a height, is different from that of the second partition wall.

4. A three-dimensional screen for dust removal that captures impurities in flowing water while allowing flowing water to pass through in the thickness direction, a screen main body portion having a plurality of water passages each penetrating in the thickness direction; a partition portion that protrudes from the upstream side surface of the screen main body toward the upstream side and is arranged along the upstream side surface, and separates the inlets of the plurality of water channels into a plurality of inlets, The three-dimensional screen for removing dust, characterized in that the partition portions are dome-shaped protrusions arranged intermittently along the upstream side surface.

5. The dust-removing three-dimensional screen according to claim 1, The dust-removing three-dimensional screen is incorporated into a predetermined frame member of a dust-removing device, A dust-removing three-dimensional screen characterized in that the screen main body and the partition are constructed separately, and the screen main body and the partition are assembled into the frame member in a state where they are overlapped with each other.

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