Dust removing device, and rake

Abstract

To provide a dust removing device and a rake that can efficiently remove dust.SOLUTION: A dust removing device 1 arranged upstream of a screen 104 arranged in a direction intersecting a flow path and using a rake 6 to rake up dust blocked by the screen 104 is provided with a lifting member 5 for displacing the rake 6 up and down. The rake 6 has a vertical raking-up portion 14 arranged in the vertical direction. The vertical raking-up portion 14 has a vertical curved portion 17 that is curved convexly to a side away from the screen 104, and a vertical hook portion 18 that is arranged at the screen 104 side of the vertical curved portion 17 and extends from the vertical curved portion 17 towards the screen 104.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a dust removal device and a rake that use a rake attached to a lifting section to scrape up and dispose of debris such as garbage and driftwood that has adhered to the upstream side of a screen installed at the intake of a hydroelectric power plant. [Background technology]

[0002] One such dust removal device is proposed in Patent Document 1. The dust removal device in Patent Document 1 uses a rake attached to a lifting section to scrape up and discard debris such as garbage and driftwood that has adhered to the upstream side of a screen installed at the intake of a hydroelectric power plant.

[0003] Such a rake is configured with a lattice-like portion curved in an arc, so when the lifting section is raised while the lower end of the rake is in contact with the screen, the screen acts as a shield, allowing the trash to be held in the lower end portion of the rake. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-145485 Summary of the Invention [Problem to be solved by the invention]

[0005] However, even if the rake is configured with an arc-shaped, lattice-like portion, when there is a lot of dust to be removed, much of the dust may be missed and removal may not be successful.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a dust removal device and a rake that can efficiently remove dust. [Means for solving the problem]

[0007] The present invention is a dust removal device that is arranged upstream of a garbage blocking member that is arranged in a direction that intersects with a flow path, and that uses a rake to scoop up garbage blocked by the garbage blocking member, and that comprises the rake and a lifting section for displacing the rake up and down, and the rake has a vertically arranged vertical scraping section that has a vertically curved section that is convexly curved on the side away from the garbage blocking member, and a vertical hook section that is arranged on the garbage blocking member side of the vertically curved section and extends from the vertically curved section toward the garbage blocking member.

[0008] In the dust removal device of the above configuration, the vertical scraping section of the rake is equipped with a vertical curved section and a vertical hook section, and when the rake is lowered to below the garbage blocked by the garbage blocking member and then raised, the vertical curved section and the vertical hook section can remove the garbage.

[0009] In the dust removal device of the present invention, the vertical scraping sections are arranged in multiple units with spaces between them in the horizontal direction, and intermediate scraping sections are arranged between adjacent vertical scraping sections, and the intermediate scraping sections may be configured to include an intermediate curved section that is convexly curved on the side away from the dust blocking member, and an intermediate hook section that is arranged on the dust blocking member side of the intermediate curved section and extends toward the dust blocking member.

[0010] In the dust removal device of the above configuration, the intermediate scraping sections between adjacent vertical scraping sections are equipped with intermediate curved sections and intermediate hook sections, and dust that cannot be removed by multiple vertical scraping sections can be removed by the intermediate curved sections and intermediate hook sections of the intermediate scraping sections.

[0011] The present invention relates to a rake used in a dust removal device that is positioned upstream of a garbage blocking member arranged in a direction intersecting a flow path and that scoops up garbage blocked by the garbage blocking member, and that has a vertically arranged vertical scraping portion that has a vertical curved portion that is convexly curved on the side away from the garbage blocking member, and a vertical hook portion that is positioned on the garbage blocking member side of the vertical curved portion and extends toward the garbage blocking member.

[0012] In the rake of the above configuration, the vertical scraping section is provided with a vertical curved section and a vertical hook section, and when the rake is lowered to below the garbage blocked by the garbage blocking member and then raised, the vertical curved section and the vertical hook section can remove the garbage.

[0013] The rake of the present invention may be configured such that the vertical scraping sections are arranged in multiple units with spaces between them in the horizontal direction, and intermediate scraping sections are arranged between adjacent vertical scraping sections, and each intermediate scraping section has an intermediate curved section that is convexly curved on the side away from the garbage blocking member, and an intermediate hook section that is arranged on the garbage blocking member side of the intermediate curved section and extends toward the garbage blocking member.

[0014] In a rake of the above configuration, the intermediate scraping sections between adjacent vertical scraping sections are equipped with intermediate curved sections and intermediate hook sections, and debris that cannot be removed by multiple vertical scraping sections can be removed by the intermediate curved sections and intermediate hook sections of the intermediate scraping sections. [Effects of the Invention]

[0015] In the dust remover and rake of the present invention, the dust can be held by the vertical hook portion of the vertical scraping portion, or by the vertical curved portion and the vertical hook portion, so that the dust can be removed efficiently. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is an explanatory diagram showing a schematic configuration of a water intake for a hydroelectric power plant in which a dust removal device according to the present invention is used. [Figure 2] FIG. 2 is a front view of the dust remover according to the present invention as seen from the upstream side of the water flow. [Figure 3] FIG. 3 is an enlarged view showing the structure for tilting the lifting member having the rake at the tip of the dust remover according to the present invention. [Figure 4] FIG. 4 is a side view showing how the wires of the dust remover according to the present invention are tensioned and the shape of the rake. [Figure 5] FIG. 5 is a front view of the entire rake including the lifting member of the dust removing device according to the present invention. [Figure 6] FIG. 6 is a side view of the rake including the lifting member of the dust removing apparatus according to the present invention. [Figure 7] FIG. 7 is an enlarged view showing the scraping portion of the rake of the dust remover according to the present invention. [Figure 8] FIG. 8 is an enlarged front view of the rake of the dust remover according to the present invention. [Figure 9] FIG. 9 is an enlarged plan view of the rake of the dust remover according to the present invention. [Figure 10] FIG. 10 is a front view showing a roller of the dust remover according to the present invention. [Figure 11] 11 is a cross-sectional view of the roller of the dust remover according to the present invention taken along line XI-XI of FIG. 10. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] A dust remover according to one embodiment of the present invention will be described with reference to FIGS. 1 to 11. FIG.

[0018] 1 shows an example of a location where this type of dust removal device 1 is installed, which includes a water intake (also referred to as an inlet) 100 of a hydroelectric power plant and a water channel 200 that forms a flow path upstream of the water intake 100. Accordingly, when a large amount of water is taken in through the water intake 100, the flow rate of the water flowing from the water channel 200 into the water intake 100 becomes relatively large.

[0019] The water intake 100 has two openings 100a and 100b between vertical walls 101 and 102 and a partition wall 103 located between the vertical walls 101 and 102. A screen 104 is disposed at each opening 100a and 100b as a debris blocking member that blocks debris to prevent trash, driftwood, and other debris from entering the hydroelectric power plant through the opening 100a and 100b. The lower end of the screen 104 is normally located below the water level of the waterway 200.

[0020] 1 and 9, the screen 104 is formed in a fence or lattice shape consisting of vertical rods 104A arranged at predetermined intervals and horizontal rods that intersect with the vertical rods 104A, and a known type is used in this embodiment. Although not shown, the horizontal rods of the screen 104 are arranged downstream of the vertical rods 104A.

[0021] A frame 105 constituting a gate is arranged above the water surface of the vertical walls 101, 102 and partition wall 103 of the intake 100. The frame 105 has a support pillar 106 erected from the vertical wall 101, a support pillar 107 erected from the partition wall 103, and a support pillar 108 erected from the vertical wall 102, and these supports 106, 107, 108 support a beam-like member 109 extending laterally.

[0022] As shown in Figure 1, the dust removal device 1 is placed between the support columns 106 and 107, and between the support columns 107 and 108, and is installed at the water intake 100 so as to be movable along the axial direction of the installation mechanisms 2 and 3, which are installed on these supports 106, 107, and 108.

[0023] In this embodiment, as shown in FIGS. 1 to 3, the erection mechanism 2 includes two cylindrical guide rails 21 and 22 that extend parallel to each other in the horizontal direction. Each of the guide rails 21 and 22 is fixed to a support column 106, 107, and 108 and is therefore immovable. In addition, in this embodiment, as shown in FIGS. 1 to 3, the erection mechanism 3 includes one cylindrical guide rail 31 that extends parallel to and below the guide rails 21 and 22. The guide rail 31 is also fixed to a support column 106, 107, and 108 and is therefore immovable. The erection mechanism 2 may also be configured with only one of the guide rails 21 and 22.

[0024] In this embodiment, the dust remover 1 has a moving member 4, a lifting member 5, a rake 6, a holding member 7, an operating mechanism 8, and a driving device 9, as shown in FIG.

[0025] [Moving member] The moving member 4 has two base bodies 41 and 42 extending in the up-down direction (vertical direction), and the base bodies 41 and 42 are arranged side by side along the axial direction of the guide rails 21, 22, 31. In addition, the base body 42 is provided with a rod body 32 extending in the up-down direction (vertical direction).

[0026] Bases 41 and 42 are provided with protrusions 43 on the screen 104 side, and further, U-shaped member 44 that opens on the lower side and U-shaped member 45 that opens on the upper side are attached to protrusion 43. U-shaped member 44 is disposed above U-shaped member 45 and at a distance from U-shaped member 45 that corresponds to the distance between guide rail 21 and guide rail 22.

[0027] Rollers 47 are rotatably supported on the U-shaped members 44 and 45 by horizontally extending rotation shafts 47a. Each roller 47 has a generally cylindrical shape with a constriction in the axial center of the rotation shaft 47a. The rollers 47 of the U-shaped member 44 roll with their lower peripheral surfaces in contact with the guide rail 21, and the rollers 47 of the U-shaped member 45 roll with their upper peripheral surfaces in contact with the guide rail 22. This allows the moving member 4 to move along the axial direction of the guide rails 21 and 22, and the guide rails 21 and 22 are sandwiched between the rollers 47 of the U-shaped members 44 and 45, preventing the moving member 4 from slipping off the guide rails 21 and 22.

[0028] A U-shaped member 46 that opens downward is attached to the bases 41 and 42 near their lower ends. That is, the U-shaped member 46 is disposed below the U-shaped member 45 and at a distance from the U-shaped member 45 that corresponds to the distance between the guide rail 22 and the guide rail 31.

[0029] A roller 47 is rotatably supported on the U-shaped member 46 by a rotation shaft 47a extending horizontally. The roller 47 of the U-shaped member 46 is also cylindrical with a constriction in the axial center of the rotation shaft 47a. In the U-shaped member 46, the roller 47 rolls with its lower peripheral surface in contact with the guide rail 31. This allows the moving member 4 to be supported from above and below by the erection mechanisms 2 and 3, and to move more stably along the axial direction of the guide rails 21, 22, and 31. Furthermore, the U-shaped members 45 and 46 open in opposite directions and are arranged offset horizontally, which makes it even more difficult for the moving member 4 to come off the guide rails 21, 22, and 31.

[0030] 4, the moving member 4 has a handle 48 attached to the base bodies 41 and 42. The handle 48 is also called a lateral movement handle, and in this embodiment, the handle 48 is made up of two rod-shaped protrusions that protrude horizontally from the base bodies 41 and 42 opposite the screen 104 side, and a rod-shaped connecting part that connects the protrusions together, and has a substantially U-shape when viewed from above or below. This allows an operator to hold the handle 48 and push or pull it in the axial direction of the guide rails 21, 22, and 31, thereby moving (transversely moving) the moving member 4, and ultimately the dust removal device 1, along the axial direction of the guide rails 21, 22, and 31.

[0031] 2, the moving member 4 has locking devices 49, 49 on each of the base bodies 41, 42 for restricting the movement (lateral movement) of the moving member 4. In this embodiment, the locking device 49 is made up of a handle 49a and a straight, rod-shaped locking body 49b that is screwed into the base bodies 41, 42, and by rotating the handle 49a, the locking body 49b can be moved in a direction toward or away from the guide rail 31. When the tip of the locking body 49b is pressed against the side surface of the guide rail 31, the movement (lateral movement) of the moving member 4 is locked, and when the tip of the locking body 49b moves away from the side surface of the guide rail 31, the lock against the movement (lateral movement) of the moving member 4 is released.

[0032] [Lifting member] As shown in Fig. 3, the lifting member (lifting section) 5 is made up of only a rod-shaped body (prism) that extends linearly and has a square cross section, and is disposed between the bases 41 and 42 of the moving member 4 (see Fig. 2), and is disposed diagonally across the moving member 4 so that its upper side faces the screen 104 relative to the moving member 4 and its lower side faces the opposite side of the moving member 4. To prevent the lifting member 5 from descending more than necessary, a stopper 51 that comes into contact with the upper end of the holding member 7 described below is formed on the outer surface of the side wall of the lifting member 5 as shown in Fig. 3.

[0033] The lifting member 5 is supported by the moving member 4 via a holding member 7, and is able to move up and down along the axial direction of the lifting member 5 by receiving a driving force from a drive device 9 (see FIG. 4) described below. The lifting member 5 has a rake 6 at the bottom, which is one end in the longitudinal direction, for raking up debris such as trash and driftwood.

[0034] 〔rake〕 As shown in Fig. 4, the rake 6 has a base 10 attached to the lifting member 5 and a lattice portion 64. The base 10 is formed in a rectangular cylindrical shape and is fitted onto the lower end of the lifting member 5 so as to be attached to the lower end of the lifting member 5. A connecting portion 95 is provided on the side of the base 10. The connecting portion 95 is configured to attach the tip of a wire 93 of the drive unit 9, which will be described later, and has a flange 11 attached to the side of the base 10 of the rake 6 and a pin 12 that engages the wire 93.

[0035] The lattice portion 64 is joined to the lower part of the base 10, and has a configuration including a curved lattice portion 64. As shown in Fig. 4, the (upper) base end of the lattice portion 64 is on the axis of the lifting member 5, but from the base end to the tip of the lattice portion 64, it is curved significantly in the opposite direction to the connecting portion 95, and the tip of the lattice portion 64 is deviated from the axis of the lifting member 5.

[0036] Here, a specific configuration of the lattice portion 64 will be described. As shown in Figures 5 to 9, the lattice portion 64 has a base portion 13 arranged at the upper part in the horizontal direction (on the side of the base 10), a plurality of vertical scraping portions 14 arranged in the vertical direction below the base portion 13, a plurality of intervening scraping portions 15 arranged between adjacent vertical scraping portions 14, and horizontal scraping portions 16 arranged below the base portion 13, spaced apart in the vertical direction, and arranged in the horizontal direction.

[0037] The base 13 is formed in a plate shape, and the lower part of the base body 10 is joined to the lateral center of the base 13. In this case, the lower part of the base body 10 is welded.

[0038] [Vertical stir-frying section] A plurality of vertical scraping sections 14 are arranged at intervals in the horizontal direction, and in this embodiment, eleven vertical scraping sections 14 are used, as shown in Figures 8 and 9. Each vertical scraping section 14 is formed in the shape of a plate having a length in the up-down direction, a plate thickness in the horizontal direction, and a width in the longitudinal direction, and is joined to the lower part of the base section 13. In this case, each vertical scraping section 14 is welded to the lower part of the base section 13.

[0039] As shown in Figures 6 and 7, each vertical scraping section 14 has a vertical curved section 17 curved toward the screen 104, and a vertical hook section 18 arranged on the lower end (tip) side of the vertical curved section 17 and extending from the vertical curved section 17 toward the screen 104.

[0040] The vertically curved portion 17 of the vertical scraping section 14 is curved so that its lower end (tip) is positioned closer to the screen 104 than its upper end (base end). In other words, it is curved to a length that forms an arc on the screen 104 side. In this case, the vertically curved portion 17 is formed in an arc shape that is convex on the upstream side of the screen 104, and has a vertically curved outer surface 17a on the upstream side and a vertically curved inner surface 17b on the downstream side. As shown in FIG. 6, the vertically curved portion 17 is specified with an imaginary point on the inside (downstream side) of the screen 104 as the arc center 19.

[0041] In contrast, the vertical hook portion 18 of the vertical scraping portion 14 is formed in a straight line. The length direction of the vertical hook portion 18 is specified as a direction intersecting the length direction of the vertical curved portion 17. Furthermore, the vertical hook portion 18 protrudes from the vertically curved inner surface 17b of the vertical curved portion 17 toward the screen 104. Furthermore, the center of the vertical hook portion 18 extends from the arc of the vertical curved portion 17 toward the screen 104, away from the arc. Furthermore, the center of the vertical hook portion 18 forms an obtuse angle with respect to the arc of the vertical curved portion 17.

[0042] The vertical hook portion 18 has a vertical hook outer surface 18a that continues from the vertical curved outer surface 17a and a vertical hook inner surface 18b that continues from the vertical curved inner surface 17b. The vertical hook portion 18 also has a vertical tip surface 18c (edge) that continues from the tip of the vertical hook outer surface 18a to the tip of the vertical hook inner surface 18b, and the vertical tip surface 18c is inclined so that the vertical hook outer surface 18a side is located upstream compared to the vertical hook inner surface 18b side.

[0043] On the screen 104 side of the vertical scraping section 14, there is a curved linear space S1 surrounded by the vertical curved inner surface 17b of the vertical curved section 17 and the vertical hook inner surface 18b of the vertical hook section 18, resulting in a curved shape that follows the vertical curved inner surface 17b and a linear shape that follows the vertical hook inner surface 18b.

[0044] [Intermediate fried food section] The intermediate scraping section 15 is disposed in the center of the adjacent vertical scraping section 14. As shown in Fig. 7, the intermediate scraping section 15 includes an intermediate curved section 23 that is shorter in length than the vertical curved section 17 of the vertical scraping section 14, and an intermediate hook section 24 that is shorter in length than the vertical hook section 18 of the vertical scraping section 14, and is disposed in the same row as the vertical scraping section 14.

[0045] The intermediate curved portion 23 has an intermediate curved outer surface 23a arranged flush with the vertical curved outer surface 17a of the vertical scraping portion 14, and an intermediate curved inner surface 23b arranged flush with the vertical curved inner surface 17b of the vertical scraping portion 14. The intermediate curved outer surface 23a and the intermediate curved inner surface 23b are identified as the arc center 19 similar to that of the vertical curved portion 17.

[0046] The intermediate hook portion 24 includes an intermediate hook outer surface 24a that is disposed flush with the vertical hook outer surface 18a of the vertical scraping portion 14, and an intermediate hook inner surface 24b that is disposed flush with the vertical hook inner surface 18b of the vertical scraping portion 14. The intermediate hook portion 24 also has an intermediate tip surface 24c (edge) that connects the tip of the intermediate hook outer surface 24a and the tip of the intermediate hook inner surface 24b, and is inclined so that the intermediate hook outer surface 24a side is disposed upstream compared to the intermediate hook inner surface 24b side.

[0047] On the screen 104 side of the inter-surface scraping section 15, there is a curved linear space S2 surrounded by the inter-surface curved inner surface 23b of the inter-surface curved section 23 and the inter-hook inner surface 24b of the inter-hook section 24, and a curved shape that follows the inter-surface curved inner surface 23b and a linear shape that follows the inter-hook inner surface 24b.

[0048] The relationship between the vertical hook portion 18 and the intermediate hook portion 24 is such that the tip of the vertical hook portion 18 is located downstream and the tip of the intermediate hook portion 24 is located upstream. Furthermore, the vertical curved inner surface 17b of the curved linear space S1 is flush with the intermediate curved inner surface 23b of the curved linear space S2, and the vertical hook inner surface 18b of the curved linear space S1 is flush with the intermediate hook inner surface 24b of the curved linear space S2.

[0049] [Side fried food section] The horizontal scraping sections 16 are connected so as to penetrate the vertical scraping sections 14 and the intermediate scraping sections 15, and extend to the vertical scraping sections 14 on both side ends. In addition, each vertical scraping section 14 is welded to the bottom of the base section 13. In contrast, the intermediate scraping sections 15 are attached to the horizontal scraping sections 16. In this embodiment, five horizontal scraping sections 16 are arranged, two of which penetrate the intermediate scraping sections 15 and support them.

[0050] The lattice portion 64 has rollers 63. The rollers 63 function to contact the screen 104 and roll when the lattice portion 64 moves up or down the screen 104, specifically the vertical rods 104A. A plurality of rollers 63 (two in this embodiment) are provided on the outer vertical hook surfaces 18a of the vertical scraping portion 14. As shown in FIGS. 10 and 11 , the rollers 63 are joined (welded) to the curved vertical outer surface 17a of the vertical scraping portion 14 and have plate-shaped shoulders 25 on both sides spaced apart laterally, and rollers 26 supported by the shoulders 25 and capable of rolling around a horizontal axis. The outer peripheral surface 26a of the rollers 26 is capable of rolling when in contact with the screen 104.

[0051] [Holding member] In this embodiment, the holding member 7 is a rectangular tube having a rectangular opening in the vertical direction, and as shown in Fig. 3, a pair of rollers 72, 73 are rotatably housed at the top and bottom. As a result, the holding member 7 can hold the lifting member 5 inserted into the holding member 7 in a state where it can be raised and lowered in the axial direction of the lifting member 5 by sandwiching the lifting member 5 inserted into the holding member 7 at two points, upper and lower, between the rollers 72 and 73. As shown in Fig. 2, the holding member 7 has shafts 71, 71 extending horizontally on both sides of the bases 41, 42 of the moving member 4, and the shafts 71 are inserted into through holes in flanges 41a, 42a protruding from the bases 41, 42. As a result, the holding member 7 is supported by the moving member 4 and can be swung around the shaft 71 as an axis to achieve the desired inclination angle, and ultimately the rake 6 of the lifting member 5 can be moved closer to or closer to the screen 104 (opening and closing the rake 6).

[0052] Flanges 74, 74 are formed on the holding member 7, and a roller 97 is rotatably attached between the flanges 74, 74. A connecting portion 95 provided on the base 10 of the rake 6 protrudes from the rake 6 by a length such that, when the axis of the lifting member 5 is taken as a reference line, the dimension from the reference line of the lifting member 5 to the roller 97 is the same as the dimension from the reference line of the lifting member 5 to the part of the connecting portion 95 where the wire 93 is fixed.

[0053] As a result, the wire 93 extending from the wire winding / pulling device 92 first contacts the peripheral surface of the roller 94 on the side opposite the screen 104, and then contacts the peripheral surface of the roller 97 on the screen 104 side, and although the inclination angle up to the roller 97 is steeper than the axis of the moving member 4, the wire 93 extends from the roller 97 to the connecting part 95 in the same direction as the axial direction of the lifting member 5. Therefore, the wire 93 can maintain a force pulling the rake 6 in a direction away from the screen 104, while also being able to pull in the axial direction of the lifting member 5, thereby enabling the lifting member 5 to move up and down smoothly.

[0054] [Operating mechanism] As shown in Figures 3 and 4, the dust removal device 1 has an operating mechanism 8 for adjusting the inclination angle of the holding member 7 to move the rake 6 closer to or closer to the screen 104. The operating mechanism 8 includes a shaft 81, a handle 82, and a link member 83.

[0055] The shaft 81 has one end rotatably attached to the moving member 4 and at least a portion threaded, and extends obliquely upward from the moving member 4 in the direction opposite to the screen 104 side. The handle 82, which is also called an opening / closing handle, is composed of an annular handle main body 82a connected to the shaft 81 and a holder 82b fitted around the shaft 81; the holder 82b does not rotate and is supported by the moving member 4 via a support member 84. In this embodiment, a grip portion 82c is provided on the handle main body 82a. One end of the link member 83 is fitted around the threaded portion of the shaft 81, and as the shaft 81 rotates, the threaded portion moves along the axial direction of the shaft 81, and the other end is fixed to the holding member 7.

[0056] As a result, as shown by the solid line and the dotted line in Figure 3, by rotating the handle main body 82a, the shaft 81 rotates and the link member 83 is displaced along the axial direction of the shaft 81, so that the retaining member 7 can swing around the shaft 71 as the center of rotation.

[0057] [Driver] 4, in this embodiment, the drive device 9 is made up of a motor 91, a wire winding / pulling device 92, and a wire 93, and is attached above the moving member 4. The wire 93 travels from the wire winding / pulling device 92 and comes into contact with the peripheral surface of a roller 94, which is installed between flanges 41b and 42b protruding toward the screen 104 from the moving member 4, on the side opposite to the screen 104, and is then attached to a connecting portion 95 provided on the rake 6, thereby being stretched at an angle steeper than the axis of the lifting / lowering member 5 between the wire winding / pulling device 92 and the rake 6. A control box 96 having an up switch and a down switch for the lifting / lowering member 5 is attached to the moving member 4.

[0058] As a result, by pressing the up switch and the down switch as appropriate, the wire winding / unwinding device 92 winds or unwinds the wire 93, and the lifting member 5 can be raised and lowered along the axial direction of the lifting member 5. Furthermore, the wire 93 extending from the wire winding / unwinding device 92 is connected to the rake 6 at an angle that is steeper than the direction in which the screen 104 extends. Therefore, the rake 6 is pulled from above in a direction closer to vertical than the screen 104, and therefore the rake 6 is prevented from sticking to the screen 104 even when the flow velocity of the waterway 200 is high.

[0059] Here, we will explain the function of the rake 6, which is the main component of the present invention, in the dust remover 1. The dust remover 1 is placed upstream of a screen 104 that is provided in a direction that intersects with the waterway 200 that forms the flow path, and removes the debris blocked by the screen 104 by raking it up with the rake 6. The debris includes long, thin debris such as branches and reeds, as well as driftwood.

[0060] The garbage collected on the screen 104 can be collected periodically or irregularly as follows: The lattice portion 64 of the rake 6 is lowered on the upstream side of the screen 104 by driving the lifting member 5. At this time, the operating mechanism 8 is operated to adjust the inclination angle of the holding member 7 so that the garbage collected on the screen 104 can be avoided, and the lattice portion 64 is lowered to the water channel 200 (for example, to the lower end of the screen 104).

[0061] Then, the operating mechanism 8 is operated again to readjust the inclination angle of the holding member 7 and bring the lattice portion 64 closer to the screen 104, and the handle 48 of the moving member 4 is operated to move the moving member 4, i.e., the lattice portion 64, along the axial direction of the guide rails 21, 22, 31, and when the lattice portion 64 reaches a predetermined position, the movement of the moving member 4 is locked by the locking devices 49, 49.

[0062] Here, the predetermined position is preferably a position where the vertical scraping-up portion 14 is inserted between the vertical rods 104A of the screen 104 and the intermediate scraping-up portion 15 faces the upstream side of the vertical rods 104A, as shown in Figure 9. In other words, it is preferable that the vertical hook portion 18 (vertical tip surface 18c) of the vertical scraping-up portion 14 is inserted between the vertical rods 104A of the screen 104 and the intermediate hook portion 24 of the intermediate scraping-up portion 15 approaches the upstream side of the vertical rod 104A.

[0063] 9, the predetermined position is a position where the edge (vertical tip surface 18c) of the vertical hook portion 18 is on the downstream side with respect to the outer surface 104a of the screen 104, the edge (intermediate tip surface 24c) of the intermediate hook portion 24 is on the upstream side, and the outer peripheral surface 26a of the roller 26 of the roller 63 abuts on the outer surface 104a of the screen 104. The outer surface 104a of the screen 104 is formed to be inclined upward toward the downstream side.

[0064] After the position of the lattice portion 64 is identified in this manner, the lattice portion 64 is raised by driving the lifting member 5, and the debris blocked by the screen 104 is scraped up and removed by the lattice portion 64. That is, since the vertical hook portions 18 (vertical tip surfaces 18c) of the vertical scraping portion 14 are inserted between the upright poles 104A of the screen 104, the debris blocked by the screen 104 can be easily scooped up by the vertical hook inner surfaces 18b of the vertical hook portions 18. At this time, even when the lattice portion 64 is raised, the vertical scraping portion 14 (vertical hook portions 18) are inserted between the upright poles 104A of the screen 104 and do not come into contact with the horizontal poles of the screen 104, so it can be raised without receiving resistance from the screen 104 (load from the screen 104).

[0065] Furthermore, when the intermediate curved portion 23 is close to the upstream side of the vertical rod 104A and the lattice-like portion 64 is raised, any debris not scooped up by the vertical hook inner surfaces 18b of the vertical hook portions 18 can be easily scooped up by the intermediate hook inner surfaces 24b of the intermediate curved portion 23. At this time, because the intermediate curved portion 23 is only close to the upstream side of the vertical rod 104A, even when the lattice-like portion 64 is raised, it can rise without encountering resistance from the screen 104. Furthermore, the debris falls diagonally downward from the vertical hook inner surfaces 18b and the intermediate hook inner surfaces 24b, moving into the curved linear spaces S1 and S2 where it can be scooped up and removed.

[0066] For example, even if the debris is driftwood, the vertical scraping unit 14 is inserted between the upright poles 104A of the screen 104, so that the debris can be removed by moving it into the curved linear spaces S1 and S2.

[0067] As a result, when the lifting member 5 rises parallel to the screen 104, it can rise while holding the debris in the depression formed by the screen 104 and the portion near the tip of the rake 6, and when the tip of the rake 6 is higher than the upper end of the screen 104, the debris is naturally removed from the rake 6. This makes it possible to smoothly scoop up and discard the debris using the rake 6.

[0068] In this embodiment, the lattice portion 64 of the rake 6 is lowered and raised in each lateral direction of the screen 104 to remove the debris held by the screen 104.

[0069] The present invention is not limited to the above-described embodiment. In the above-described embodiment, the hook portion is formed at an obtuse angle relative to the arc of the curved portion, but this angle may be an angle toward the screen side. Furthermore, the hook portion has a tip surface (edge) that connects the tip of the outer hook surface with the tip of the inner hook surface, and the tip surface is inclined so that the outer hook surface is positioned upstream compared to the inner hook surface, but this does not have to be inclined. Furthermore, in the above-described embodiment, one intermediate scraper is disposed between the vertical scrapers, but two intermediate scrapers may be disposed. [Explanation of symbols]

[0070] 1...dust removal device, 4...moving member, 5...lifting member, 6...rake, 7...holding member, 8...operating mechanism, 13...base portion, 14...vertical scraping portion, 15...interval scraping portion, 16...horizontal scraping portion, 17...vertical curved portion, 17a...vertical curved outer surface, 17b...vertical curved inner surface, 18...vertical hook portion, 18a...vertical hook outer surface, 18b...vertical hook inner surface, 18c...vertical tip surface, 23...interval curved portion, 23a...interval curved outer surface, 23b...interval curved inner surface, 24...interval hook portion, 24a...interval hook outer surface, 24b...interval hook inner surface, 24c...interval tip surface, 100...water intake, 100a, 100b...opening, 104...screen, 104a...outer surface of screen, 104A...standing pole, 200...water channel, S1, S2...curved linear space

Claims

1. A dust removal device disposed upstream of a dust blocking member provided in a direction intersecting a flow path, for raking up dust blocked by the dust blocking member with a rake, The rake and a lifting unit for displacing the rake up and down are provided, The rake has a vertical scraping section arranged in a vertical direction, The vertical scraping portion is a dust removal device that includes a vertical curved portion that is convexly curved on the side away from the dust blocking member, and a vertical hook portion that is positioned on the dust blocking member side of the vertical curved portion and extends from the vertical curved portion toward the dust blocking member side.

2. The vertical scraping section is arranged in a plurality of units at intervals in the horizontal direction, An intermediate scraping section is arranged between adjacent vertical scraping sections, The dust removal device described in claim 1, wherein the inter-scraping portion comprises an inter-curved portion that is convexly curved on the side away from the dust blocking member, and an inter-hook portion that is arranged on the dust blocking member side of the inter-curved portion and extends toward the dust blocking member.

3. A rake used in a dust removal device that is disposed upstream of a dust blocking member provided in a direction intersecting a flow path and that rakes up dust blocked by the dust blocking member, It is equipped with a vertically arranged vertical scraping section, The vertical scraping portion is a rake having a vertical curved portion that is convexly curved on the side away from the garbage blocking member, and a vertical hook portion that is positioned on the garbage blocking member side of the vertical curved portion and extends toward the garbage blocking member.

4. The vertical scraping section is arranged in a plurality of units at intervals in the horizontal direction, An intermediate scraping section is arranged between adjacent vertical scraping sections, A rake as described in claim 3, wherein the inter-scraping portion comprises an inter-curved portion that is convexly curved on the side away from the garbage blocking member, and an inter-hook portion that is positioned on the garbage blocking member side of the inter-curved portion and extends toward the garbage blocking member.

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