Water force driven dust collector

Abstract

To provide a water force driven dust collector discharging dust flowing through a water passage using force of water in the water passage.SOLUTION: A water force driven dust collector is provided with a water turbine 10 rotating around a rotational shaft 11 extending in a width direction of a water passage W1 and placed in the water passage W1 to rotate through receiving water with a plurality of blades 12 arranged on an outer peripheral surface to be placed in the water passage W1. A bar screen 20 catching dust D by arranging a plurality of bar members 21 in a width direction of the water passage W1 on a downstream side of a generally lower half part of the water turbine 10 so as to face a rotation track of tips of the blades 12, and a dust receiving part 40 placed at its upper end are arranged. The rotational shaft 11 is placed at a position higher than a water level of the water passage W1, and an upper end of the bar screen 20 is placed at a position lower than the rotational shaft 11 of the water turbine 10. As arranging a rake 30 having a concave part 32 in the blade 12, water stored in the concave part 32 of the rake is caused to flow into the dust receiving part 40 from the upper end of the bar screen 20 by making the rake 30 projecting upward incline downward relative to the upper end of the bar screen 20 from the water level of the water passage W1 due to rotation of the water turbine 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a water-driven dust removal device that rotates by the force of water flowing through a waterway, and scoops up and discharges the garbage flowing through the waterway. [Background technology]

[0002] For example, waterways used for hydroelectric power generation are provided with dust removal devices for removing dust that flows through the waterways. A conventional dust removal device is disclosed in which a water wheel is provided on the upstream side of a waterway and a scooping conveyor with a rake is provided on the downstream side of the waterway. The water wheel is rotated by the water flow in the waterway, and the resulting rotational force causes the scooping conveyor to rotate, with the tines of the rotating scooping conveyor capturing dust flowing down the waterway (see, for example, Patent Document 1).

[0003] Also disclosed is a system in which a waterway is provided with a water wheel, a scooping conveyor with a claw section, and a screen, the water wheel is rotated by the water flow in the waterway, the resulting rotational force causes the scooping conveyor to rotate, and the claw section of the rotating scooping conveyor captures debris adhering to the screen (see, for example, Patent Document 2).

[0004] Furthermore, a device has been disclosed in which the debris stuck to the drum is scraped off by a rake installed on the water downstream of the drum and then collected in a designated location by a rotating scraping device (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2011-84870 A [Patent Document 2] JP 2014-31624 A [Patent Document 3] JP 2006-307518 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the dust removal device described in Patent Document 1 is configured to capture dust flowing down the waterway with the claws of the circulating scooping conveyor, and is therefore unable to capture dust flowing on both sides of the scooping conveyor. In addition, because the scoop conveyor is installed upstream of the water wheel, the flow rate and speed of the water flow are reduced by the scoop conveyor, so the water wheel cannot be rotated effectively, and as a result, the scoop conveyor cannot rotate efficiently and cannot capture the garbage well.

[0007] In addition, the dust removal device described in Patent Document 2 is configured to capture dust attached to the screen with the claws of the rotating pick-up conveyor, so that the front side (upstream side) of the screen is inevitably formed with not only the ascending part of the pick-up conveyor but also the descending part, which is called a double belt structure. Therefore, the claws of the descending belt part also capture dust, and a large amount of dust gets caught between the pick-up conveyor and the lower end of the screen. As a result, the pick-up conveyor malfunctions and the dust cannot be captured well.

[0008] Furthermore, the dust removal device described in Patent Document 3 cannot capture dust well because dust slips through between the net-like screen and the rake. Also, this device uses a water flow to discharge dust inside the drum from the side of the drum to prevent dust from accumulating inside the drum, so the dust discharged from the side of the drum is washed downstream.

[0009] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a water-powered dust removal device that can effectively capture and discharge garbage flowing through a waterway by utilizing the rotational force generated by the water flow in the waterway. [Means for solving the problem]

[0010] In order to achieve the above object, the hydraulic dust remover (1) of the present invention comprises: A water wheel (10) is disposed in the waterway (W1), and the water wheel (10) is drum-shaped and rotates around a rotating shaft (11) extending in the width direction of the waterway (W1), and has a plurality of spaced blades (12) extending in the width direction on its outer circumferential surface. The water wheel (10) receives water at the blades (12) and rotates. The water turbine (10) is provided on the downstream side of the approximately lower half thereof with a plurality of bar members (21) having arcuate surfaces (21a) facing the rotation orbit of the tip of the blades (12) at a fixed distance, a bar screen (20) formed in a comb shape in the width direction of the waterway (W1) for passing the water and capturing debris (D), and a debris receiving section (40) connected downstream from the upper end of the bar screen (20) for receiving the debris (D), thereby removing the debris (D). a rotating shaft (11) of the water turbine (10) is disposed above the water level of the waterway (W1), and an upper end of the bar screen (20) is disposed at a position lower than the rotating shaft (11) of the water turbine (10); The slats (12) are provided with a rake (30) having a recess (32) for storing pumped water, As the water wheel (10) rotates, the rake (30) of the slats (12), which protrude above the water level of the waterway (W1), is tilted downward relative to the upper end of the bar screen (20), so that the water stored in the recess (32) of the rake (30) flows into the upper end of the bar screen (20).

[0011] In addition, the present invention is characterized in that the tip of the rake (30) is provided with a plurality of protrusions (31) that fit between the bar members (21) of the bar screen (20).

[0012] The present invention is also characterized in that the recess (32) of the rake (30) is surrounded by a rear wall (33) arranged in the width direction of the blades (12) and in the direction of the rotation axis (11) of the water turbine (10), a bottom wall (34), and two side walls (35).

[0013] In the present invention, the rake (30) is provided over the entire width of the plurality of slats (12).

[0014] The present invention is also characterized in that the rake (30) is provided on a portion of the entire widthwise length of the plurality of blades (12), and the installation locations of each of the rakes (30) provided on the plurality of blades (12) are shifted along the widthwise direction of the blades (12) at least on adjacent blades (12).

[0015] Furthermore, the present invention is characterized in that the tip of the rake (30) projects beyond the tips of each of the plurality of slats (12).

[0016] The present invention is further characterized in that a dust intrusion prevention member (50) which is rotatable on the downstream side about a support shaft (51) provided at the upper end is provided between each of the bar members (21) of the bar screen (20).

[0017] Here, the symbols in parentheses indicate corresponding elements or items in the drawings and in the detailed description to be described later. Effect of the Invention

[0018] According to the hydraulically driven dust removal device of the present invention, the device is configured to include a water wheel that receives water with multiple blades and rotates, a bar screen that has multiple bar members arranged in a comb shape to capture dust, and a dust receiving section that receives the dust captured by the bar screen.When the rake has recesses that store the water pumped up to the multiple blades and rises above the water level in the waterway, it is tilted downward toward the upper end of the bar screen, and the water stored in the recesses is allowed to flow into the upper end of the bar screen, so that the dust flowing through the waterway can be efficiently captured and discharged.

[0019] In other words, the debris captured by the bar screen is scooped up by the rake, and when the rake rises above the water level of the waterway and forms a downward slope toward the upper end of the bar screen, the debris is poured together with the water stored in the rake into a debris receiver connected to the upper end of the bar screen, so that the debris can be smoothly transported to the debris receiver by the flow of the water and discharged.

[0020] The tip of the rake does not come into direct contact with the bar screen, but may be spaced slightly from the bar screen or may be placed close to it. Alternatively, the tip of the rake may be provided with multiple protrusions that fit between the bar members of the bar screen so as to scoop up debris on the bar screen from below.

[0021] According to the present invention, the recess of the rake is surrounded by a rear wall, a bottom wall, and two side walls arranged in the width direction of the blades in the direction of the rotation axis of the water turbine, so that the pumped water can be stored reliably. Also, since there is no front wall, the stored water can be flowed reliably to the top end of the bar screen. Therefore, the captured garbage can be discharged well by the flow of water.

[0022] In addition, according to the present invention, the rake is provided over the entire width of the multiple slats, so that the debris captured by the bar screen can be raked up over a wide area at once. At the same time, more water can be pumped up and flushed away, so that the debris can be efficiently discharged.

[0023] According to the present invention, the rake is provided on a part of the entire width of the plurality of slats, and the installation positions of the rake are shifted along the width direction at least on adjacent slats, so that all of the garbage captured by the bar screen can be lifted up little by little without fail. Also, since an appropriate amount of water can be pumped up and flushed, the garbage can be discharged well.

[0024] Furthermore, since the tip of the rake protrudes beyond the tips of each of the plurality of slats, the rake can capture debris more reliably and effectively.

[0025] Furthermore, since a dust intrusion prevention member is provided between each bar member of the bar screen, dust can be prevented from passing between the bar members. The dust is retained on the upstream surface of the bar screen and raked up by the rake. This prevents a decrease in power generation and damage to structures such as water turbines installed downstream.

[0026] If large debris such as tree branches get in between the bar members, the debris intrusion prevention member can rotate downstream around a shaft at its upper end, so the pressure of the debris causes the lower half to rotate downstream around the shaft at the upper end, allowing the debris to get in between the bar members. This makes it possible to prevent the debris from protruding too far upstream and interfering with the rake or blades, impeding the rotation of the water turbine. [Brief description of the drawings]

[0027] [Figure 1] 1 is a perspective view showing a hydraulically driven dust removal device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing a rake provided in the hydraulically-driven dust remover shown in FIG. [Diagram 3] FIG. 3 is a perspective view showing another example of the rake shown in FIG. 2. [Figure 4] 2 is a partially enlarged front view of the hydraulically-driven dust remover shown in FIG. 1. [Diagram 5] FIG. 2 is a partially enlarged side view of the hydraulically driven dust remover shown in FIG. [Figure 6] FIG. 2 is a partially enlarged side view of the hydraulically driven dust remover shown in FIG. 1 (showing the movement of the dust intrusion prevention member). [Figure 7] 3 is an enlarged plan view of a main portion showing the positional relationship between the rake and the bar screen shown in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] A hydraulic dust remover 1 according to an embodiment of the present invention will be described with reference to FIGS.

[0029] The hydraulically-driven dust removal device 1 of this embodiment is placed in a waterway W1 and removes dust D contained in the water flowing through this waterway W1, and the water from which the dust D has been removed is used, for example, to generate electricity in a hydroelectric generator.

[0030] 1, the hydraulic dust remover 1 includes a water wheel 10, a bar screen 20, and a dust receiver 40. In this embodiment, a spillway W2 is provided adjacent to the waterway W1, and the dust D removed by the hydraulic dust remover 1 of this embodiment is sent to this spillway W2 and discharged together with water.

[0031] The water turbine 10 is drum-shaped and rotates around a rotating shaft 11 extending in the width direction of the waterway W1, and a number of flat blades 12 extending in the width direction of the waterway W1 are provided on its outer circumferential surface radially at equal intervals from the rotating shaft 11. Each blade 12 has a length substantially the same as the total width direction of the waterway W1. The blades 12 are connected to the rotating shaft 11 via rod-shaped support members 13. The tips of these support members 13 are connected together by reinforcing members 14, thereby ensuring the necessary strength for the water turbine 10. The shape of the support members 13 is not particularly limited, and may be, for example, plate-shaped.

[0032] The bar screen 20 is provided on the downstream side of approximately the lower half of the water turbine 10 and is composed of multiple bar members 21. The multiple bar members 21 have arcuate surfaces 21a that face the rotational orbit of the tip of the blade 12 (or the tip of the rake 30) at a fixed distance, and are formed in a comb shape in the width direction of the waterway W1. Slits 22 are formed between each of the multiple bar members 21. This bar screen 20 allows only water to pass through the slits 22, and the bar members 21 capture debris D. Like the blades 12, the bar screen 20 has approximately the same length as the entire width direction of the waterway W1. Therefore, debris D can be removed from all water flowing through the waterway W1.

[0033] The rubbish receiver 40 is connected downstream from the upper end (or lower) of the bar screen 20. The rubbish receiver 40 is composed of a horizontal plate 41 arranged horizontally and a vertical plate 42 erected from the downstream end. It is preferable that at least the horizontal plate 41 of the rubbish receiver 40 is inclined downward toward the spillway W2. This allows the rubbish D placed on the rubbish receiver 40 to be smoothly carried and sent into the spillway W2 together with water by its own weight. In this case, the horizontal board 41 is a normal board (horizontal board) tilted toward the spillway W, but is not limited to this. For example, the horizontal board 41 itself may be curved and tilted downward toward the spillway W and downstream, but may be horizontal with no tilt at the upper end of the bar screen 20.

[0034] Moreover, in the hydraulically driven dust remover 1 of this embodiment, a rake 30 having a recess 32 for storing pumped up water is provided on each of the plurality of blades 12. As shown in Fig. 2, the recess 32 of this rake 30 is formed in the width direction of the blades 12 and in the direction of the rotation shaft 11 of the water turbine 10 by a rear wall 33, a bottom wall 34, and two side walls 35. This ensures that the pumped water is stored.

[0035] In addition, a plurality of protrusions 31 are arranged at equal intervals in the width direction at the tip of the rake 30 so as to fit between the plurality of bar members 21. In this way, as shown in Fig. 7, the protrusions 31 can be inserted into the slits 22 of the bar screen 20, and the debris D that has entered the slits 22 can be efficiently picked up and discharged by the protrusions 31. The protrusion 31 is formed in a trapezoid shape that is wider at the rear end than at the tip, making it difficult for it to come into contact with the tip of the bar member 21, and even if it does come into contact with the tip of the bar member 21 due to debris such as a large branch being pinched, it is easy for it to separate from the bar member 21. Note that the protrusion 31 may be formed simply in a rectangular shape instead of a trapezoidal shape.

[0036] 5, in the hydraulic dust remover 1, the rotating shaft 11 is disposed above the water level of the waterway W1, and the upper end of the bar screen 20 is disposed at a position lower than the rotating shaft 11 of the waterwheel 10. This allows the rake 30, which rises above the water level of the waterway W1 as the waterwheel 10 rotates, to be tilted downward relative to the upper end of the bar screen 20. Therefore, the water stored in the recess 32 of the rake 30 can be made to flow into the upper end of the bar screen 20 by its own weight.

[0037] 2, the upper end of the side wall 35 of the rake 30 is formed as an inclined surface 35a that is inclined downward toward the downstream side. This allows debris D that does not fit into the recess 32, such as long twigs, to be sent to the upper end of the bar screen 20 while placed on the inclined surface 35a of the side wall 35, where it can slide down the inclined surface 35a and be sent to the debris receiving section 40.

[0038] In this embodiment, each rake 30 is provided on a part of the entire width of the blade plate 12, and its tip protrudes beyond the tip of the blade plate 12. In other words, the tip of the blade plate 12 is set back from the tip of the rake 30 toward the rotating shaft 11 of the water turbine 10, forming a gap between the tip of the blade plate 12 and the bar screen 20 that will not become clogged with debris D. This allows the water turbine 10 to rotate smoothly. The width of each rake 30 is set to be the same.

[0039] In this embodiment, the installation locations of the multiple rakes 30 are shifted at regular intervals along the width direction of the adjacent slats 12. Therefore, naturally, the installation locations of the rakes 30 provided on each slat 12 are different in the width direction of the slats 12. Such an arrangement may be a so-called staggered arrangement, but is not particularly limited. By arranging the multiple rakes 30 at regular intervals in this manner, all of the debris D captured by the bar screen 20 can be reliably raked up little by little by the multiple rakes 30. In addition, an amount of water suitable for discharging the captured debris D can be pumped up and supplied.

[0040] In addition to the above-mentioned configuration of the installation locations of the multiple rakes 30, the widthwise length of each rake 30 is all the same, and the multiple blades 12 are radially arranged at equal intervals from the rotating shaft 11 as described above, so that an even force can always be applied to the rotating shaft 11. Therefore, the water turbine 10 can be rotated stably to discharge the refuse D well.

[0041] Furthermore, in this embodiment, as shown in Figures 4 and 6, a dust intrusion prevention member 50 that can rotate freely on the downstream side around a support shaft 51 provided at the upper end is provided in the slit 22 between each of the bar members 21 of the bar screen 20. A groove 52 is provided on the upstream side of the approximately middle part in the height direction of the dust intrusion prevention member 50, and a protruding stopper 23 that fits into this groove 52 is provided on the bar screen 20. The groove 52 fits into the stopper 23, preventing the dust intrusion prevention member 50 from rotating upstream. The dust intrusion prevention member 50 may be fixed in the slit 22 without being rotatable.

[0042] 6, the dust intrusion prevention member 50 is provided with an abutment portion 53 that protrudes downstream. As a result, when the dust intrusion prevention member 50 rotates downstream, the abutment portion 53 abuts against the lower surface of the dust receiving portion 40, thereby restricting the dust intrusion prevention member 50 from rotating downstream more than necessary. The abutment portion 53 functions as a balance weight when the dust intrusion prevention member 50 rotates.

[0043] The hydraulic dust remover 1 according to this embodiment operates as follows. First, the water wheel 10 receives water flowing through the waterway W1 with the blades 12 and rotates (counterclockwise in FIG. 1), causing the water to pass through the multiple slits 22 between the multiple bar members 21 of the bar screen 20. At this time, the dust D contained in the water is captured by the multiple bar members 21 and remains in that position, and the dust D that remains in that position is scooped up upward by the rake 30 provided on the blades 12 of the rotating water wheel 10 and reaches the upper end of the bar screen 20.

[0044] Furthermore, since the water wheel 10 rotates continuously, even if the debris D cannot be lifted up to the debris receiving section 40 in a single rotation, it can be moved at least to the top of the bar screen 20, and by repeating this multiple times, it can be reliably lifted up to the debris receiving section 40.

[0045] In this state, the rake 30 is inclined downward relative to the upper end of the bar screen 20, so that the debris D begins to move under its own weight to the upper end of the bar screen 20 and to the horizontal plate 41 of the debris receiver 40. The rake 30 also has a recess 32 for storing the pumped-up water, and the downward inclination causes the water to flow to the upper end of the bar screen 20, so that the debris D rides on this water flow and is smoothly sent to the debris receiver 40. The debris D and water sent to the debris receiver 40 are blocked by the vertical plate 42 of the debris receiver 40, so that spillage into the waterway W1 can be prevented.

[0046] The debris D sent to the debris receiver 40 is caused by the water flowing from the rake 30 to flow through the debris receiver 40 in the width direction of the waterway W1 and down into the adjacent spillway W2. At this time, the debris D can be easily sent to the spillway W2 together with the water by tilting the horizontal plate 41 of the debris receiver 40 downward toward the spillway W2. By the multiple rakes 30 continuously repeating this operation, the debris D captured by the bar screen 20 can be continuously sent to the spillway W2 in cooperation with the debris receiver 40 and discharged. Therefore, the debris D can be discharged well.

[0047] The debris D flowing through the waterway W1 includes relatively large debris D such as tree branches, and it is conceivable that such debris D may enter and become pinched in the slits 22. In such a state, the pinched debris D may hit the blades 12 and impede the rotation of the water turbine 10. In this embodiment, the debris intrusion prevention member 50 is freely rotatable downstream about a support shaft 51 provided at the upper end.

[0048] Therefore, the force of the trapped debris D causes its lower half to rotate downstream around the support shaft 51 at its upper end, and the rotation stops and the debris D is stopped in a state where it has received at least a portion of the debris D. This rotation is stopped when the abutment portion 53 of the debris intrusion prevention member 50 abuts against the lower surface of the horizontal plate 41 of the debris receiving portion 40. This restricts the amount of debris D protruding upstream, preventing the debris D from hitting the rake 30 or the blades 12, and allowing the water wheel 10 to rotate smoothly. Therefore, the debris D can be discharged well.

[0049] In addition, the width of the slit 22 is narrowed by the debris intrusion prevention member 50, which further prevents the debris D from passing through. The debris D is retained on the upstream surface of the bar screen 20 and is raked up by the rake 30. This makes it possible to more reliably prevent a decrease in the amount of power generation due to the intrusion of debris D and damage to structures such as water turbines installed downstream.

[0050] Furthermore, by providing a coarse-mesh screen (not shown) upstream of the hydraulically-driven dust removal device 1 in this embodiment, large flow-down debris that cannot be scooped up by this device 1 can be stopped and removed by this coarse-mesh screen.

[0051] The rake 30 in the above-described embodiment is provided on a part of the entire width of the slat 12, but is not limited thereto, and may be provided over the entire width of a plurality of slats 12. In this case, a large amount of trash D can be raked up at once, and a large amount of water can be pumped up.

[0052] In addition, as shown in FIG. 2, the rake 30 of this embodiment is provided with a plurality of tip portions 31 at the tip of the rake 30 so that the tip portions 31 enter the slits 22 between the bar members 21 of the bar screen 20. However, as shown in FIG. 3, the tip of the rake 30 may be formed as a flush inclined surface without a recess without providing a plurality of tip portions 31 at the tip. In this case, the tip of the rake 30 does not enter the slits 22 between the bar members 21 of the bar screen 20, and a slight gap is provided between the rake 30 and the bar screen 20, or the tip is in close proximity to the bar screen 20. In addition, the tip of the rake 30 may not protrude from the tip of the slat 12. For example, the tip of the rake 30 may be aligned with the tip of the slat 12. In this case, there is an advantage that the rake 30 can be reinforced by the slat 12.

[0053] Furthermore, the hydraulically driven dust removal device 1 of the present invention, which is equipped with a water wheel 10, a bar screen 20, and a garbage receiving section 40, and which can efficiently discharge the garbage D by tilting the rake 30 that scoops up the garbage D downward relative to the bar screen 20 and flowing the water pumped up by the rake 30, is not described at all in the above-mentioned patent documents. [Explanation of symbols]

[0054] 1. Hydraulic driven dust collector 10 Waterwheel 11 Rotation axis 12 Slats 13 Support member 14 Reinforcement members 20 Bar Screen 21 Bar member 21a Circular surface 22 Slit 23 Stopper 30 Rake 31 Protrusion 32 Recess 33 Back wall 34 Bottom Wall 35 side wall 35a Slope 40 Dust collector 41 Horizontal board 42 Vertical Board 50 Dust intrusion prevention material 51 Spindle 52 Groove 53 Contact part D. Dust W1 waterway W2 Spillway

Claims

1. A water wheel is disposed in the waterway and has a drum shape that rotates around a rotation axis that extends in the width direction of the waterway, and has a plurality of blades that extend in the width direction at intervals on its outer circumferential surface. The water wheel receives water and rotates with the blades. A hydraulically driven dust removal device is provided with a bar screen formed in a comb shape in the width direction of the waterway, the bar screen having a plurality of bar members having arcuate surfaces facing the rotation orbit of the blade tips at a fixed distance downstream of the approximately lower half of the water wheel, the bar screen passing the water and capturing the dust D, and a dust receiving section connected downstream from the upper end of the bar screen to receive the dust D, The rotating shaft of the water turbine is disposed above the water level of the waterway, and the upper end of the bar screen is disposed at a position lower than the rotating shaft of the water turbine, The slats are provided with a rake having a recess for collecting pumped water, This water-driven dust removal device is characterized in that, as the water wheel rotates, the rake of the slats, which rises above the water level of the waterway, is tilted downward toward the upper end of the bar screen, causing the water accumulated in the recesses of the rake to flow into the upper end of the bar screen.

2. 2. The hydraulically driven dust removing device according to claim 1, wherein a plurality of protrusions are provided at the tip of said rake, said protrusions being adapted to fit between the bar members of said bar screen.

3. 3. The water-powered dust removal device according to claim 1, wherein the recess of the rake is surrounded by a rear wall, a bottom wall, and two side walls arranged in the width direction of the blades and in the direction of the rotation axis of the water turbine.

4. 3. The hydraulically driven dust remover according to claim 1, wherein the rake is provided over the entire width of the plurality of slats.

5. The hydraulically driven dust removal device according to claim 1 or 2, characterized in that the rake is provided on a portion of the entire widthwise length of the plurality of blades, and the installation locations of each rake provided on the plurality of blades are shifted along the widthwise direction of the blades, at least on adjacent blades.

6. 3. The hydraulic dust remover according to claim 1, wherein a tip of the rake projects beyond the tips of the respective blades.

7. 3. A hydraulically driven dust removal device as described in claim 1 or 2, characterized in that a dust intrusion prevention member that can be freely rotated on the downstream side around a support shaft provided at the upper end is provided between each of the bar members of the bar screen.

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