JP6975434B2 - Dust removal device - Google Patents

Description

The present invention relates to a dust removing device for removing dust.

In power plants, irrigation facilities, etc., screens are provided at the intakes for taking water from rivers, seas, etc. to prevent the intrusion of suspended matter. If suspended matter or the like accumulates on this screen, water intake will not be performed normally. Therefore, it is necessary to remove dust such as suspended matter accumulated on the screen.

In order to remove dust, the dust remover of the water intake disclosed in Patent Document 1 removes pebbles, tree branches, etc. caught in the screen by a dustproof device provided with a scraping means. The dustproof device disclosed in Patent Document 1 causes a scraping member to enter water at a position away from the screen, sandwiches the scraping member between the screens at the bottom of the water, and scrapes up dust accumulated on the screen.

Japanese Unexamined Patent Publication No. 2004-131930

The invention disclosed in Patent Document 1 cannot cope with the case where a large amount of dust is accumulated on the screen. For example, when a large amount of driftwood or the like is deposited on the screen, the driftwood or the like fills the water surface, so that the scraping means cannot enter the water. That is, the invention disclosed in Patent Document 1 can be dealt with only when the amount of dust is contained between the water entry position of the scraping member and the screen.
Therefore, there is a demand for a dust removing device that can remove dust even when a large amount of dust is deposited on the screen.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dust removing device capable of removing a large amount of dust accumulated on a screen bar of an intake port.

In order to achieve the above object, the dust removing device according to the present invention is a device for removing dust accumulated on the upstream side of the screen bar, and moves up and down on the upstream side of the screen bar along the screen bar. The vertical moving portion, the vertical driving unit that lowers or raises the vertical moving portion, and the vertical moving portion that puts the vertical moving portion in the descending posture when lowering the vertical moving portion and raises the vertical moving portion. The vertical movement portion has a substantially rectangular shape in a plan view, and has a rake having a loading portion for loading dust, and the vertical direction and the plan view of the rake. in a first tip portion arranged to protrude on the lower side in a side portion extending in the lateral direction intersecting extend in the lateral direction is a direction crossing the vertical direction of the rake, the and a second tip portion which is arranged so as to protrude upward direction side portion opposite to the lower side portion, and when the falling time position, the first tip of the upstream side of said screen bars Close to the surface, the upper angle between the surface of the first tip and the upstream surface of the screen bar, between the surface of the loading section and the upstream surface of the screen bar. The upper angle and the upper angle between the surface of the second tip portion and the surface on the upstream side of the screen bar are sharp angles, respectively, and the second tip portion is said to be in the ascending posture. It is in a state close to the surface on the upstream side of the screen bar, and the lower angle between the surface of the second tip portion and the surface on the upstream side of the screen bar is a sharp angle, and the loading portion is the first. The second tip side is lower than the tip side of 1.

For example, in the dust removing device according to the present invention, the first tip portion has a portion that enters the gap of the screen bar in the descending posture, and the second tip portion is said in the ascending posture. It has a part that goes into the gap of the screen bar.

For example, in the dust removing device according to the present invention, the vertical moving portion further has a first roller having a flange that enters the gap of the screen bar, and has a cover on the upstream side of the first roller.

For example, in the dust removing device according to the present invention, the vertical moving portion further has a second roller having a flange that enters the gap of the screen bar in the descending posture, and the second roller. The first tip portion is arranged on the upstream side.

For example, in the dust removing device according to the present invention, the vertical drive unit has a rotary drive unit, one end thereof is connected to the rotary drive unit, and the other end portion is connected to the vertical movement unit. It has a first striatum, and the rotary drive unit winds or rewinds the first striatum to move the vertical moving portion up and down.

For example, in the dust removing device according to the present invention, the posture changing portion has a second striatum in which one end is connected to the rotation driving portion and the other end is connected to the vertically moving portion. By changing the length of the path of the second striatum, the descending posture and the ascending posture are switched.

For example, in the dust removing device according to the present invention, the second striatum is connected to one end of the vertically moving portion.

According to the present invention, when the vertical movement portion descends along the arrangement direction of the screen bar, the dust accumulated on the upstream side of the screen bar is pushed away to the upstream side and descends, and the posture is changed to move the dust vertically. Since it is loaded on the unit and rises, it is possible to provide a dust removing device capable of removing a large amount of dust accumulated on the screen bar of the intake.

Front view of the dust removing device according to the embodiment of the present invention. Side view of the dust removing device which concerns on embodiment of this invention Side view of the dust removing device which concerns on embodiment of this invention Side view of the dust removing device which concerns on embodiment of this invention Side view of the dust removing device which concerns on embodiment of this invention Side view of the dust removing device which concerns on embodiment of this invention Side view of the dust removing device which concerns on embodiment of this invention Partially enlarged view of the vertical moving portion of the dust removing device according to the embodiment of the present invention in the descending posture. Partially enlarged view of the vertical moving portion of the dust removing device according to the embodiment of the present invention in the ascending posture.

Hereinafter, the dust removing device according to the embodiment will be described with reference to the drawings.

(Embodiment)
As shown in FIGS. 1 and 2, the dust removing device according to the embodiment of the present invention has a vertical moving portion 10 that can move up and down along a screen bar 12 provided at the intake port, and a vertical moving portion 10. The vertical drive unit 100 that moves up and down, and the posture change unit that puts the vertical movement unit 10 in the descending posture when lowering the vertical movement unit 10 and puts the vertical movement unit 10 in the ascending posture when raising the vertical movement unit 10. A 120 and a discharge unit 70 for discharging dust loaded on the vertical movement unit 10 are provided. The dust removing device is arranged in the main frame 1 arranged at the upper part of the intake.

The screen bar 12 to which the vertical moving portion 10 moves is provided at the water intake port, and is composed of a plurality of plate materials. Each plate material is arranged so as to extend in the vertical direction, and is arranged with a gap between the respective plate materials. Each plate is diagonally arranged so that the lower part is on the upstream side of the upper part. The plate materials are arranged so as to overlap each other in a row when viewed from the side. Due to the screen bar 12, dust larger than the gap between the screen bars 12 is deposited on the upstream side of the screen bar 12 and does not flow to the downstream side of the screen bar 12.

As shown in FIG. 1, the vertical moving portion 10 has a rake 11 that pushes away dust when descending and lifts the dust when ascending, and two roller portions arranged at predetermined intervals from the left and right ends of the rake 11. It has 80 and a lever 30 for changing the posture of the vertical moving portion 10. The vertical movement portion 10 can be changed to a descending posture in which the dust is pushed away and lowered, and an ascending posture in which the pushed dust is lifted.

The vertical moving portion 10 shown in FIG. 1 has a rake 11 and two roller portions 80. The rake 11 is provided with brackets 81 on both ends in the longitudinal direction, brackets 82 on one side between the brackets 81, brackets 83 on the other side, and round steel 84 in the middle.
A first tip portion 21 is attached to the bracket 82, and a second tip portion 22 is attached to the bracket 83.
The first tip portion 21 is arranged over almost the entire one side portion of the rake 11, and when in the descending posture, the root faces the surface of the screen bar 12, and the tip faces the gap of the screen bar 12. Has comb teeth to enter.
The second tip portion 22 is arranged almost entirely on the other side of the rake 11 except for the roller portion 80, and the root of the second tip portion 22 faces the surface of the screen bar 12 in the ascending posture. , Has comb teeth whose tip enters the gap of the screen bar 12.
FIG. 8 shows a side view of the vertical moving portion 10 in the descending posture. As shown in this figure, the first tip portion 21 is fixed to the bracket 82 so that the angle A1 formed with the surface of the screen bar 12 becomes an acute angle when descending. The first tip portion 21 has comb teeth whose roots face the surface of the screen bar 12 and whose tips enter the gaps of the screen bar 12. Therefore, when descending, the first tip portion 21 scrapes off the dust adhering to the surface of the screen bar 12 and also scrapes out the dust contained in the gap between the screen bars 12.
FIG. 9 shows a side view of the vertically moving portion 10 in the ascending posture. As shown in this figure, the second tip portion 22 is fixed to the bracket 83 so that the angle A3 formed with the surface of the screen bar 12 becomes an acute angle when ascending. The second tip portion 22 has a comb tooth whose root faces the surface of the screen bar 12 and whose tip enters the gap of the screen bar 12. Therefore, the second tip portion 22 scoops up the dust adhering to the surface of the screen bar 12 and scoops out the dust contained in the gap between the screen bars 12 when ascending.

The loading portion 24 constituting the upper surface of the rake 11 passes with a gap between the bracket 82 and the bracket 83, except for the roller portion 80 and the attachment portion of the first striatum 40 to the vertical moving portion 10. It is composed of a plurality of rods made of. The loading unit 24 loads the dust on the upstream side of the screen bar 12 when ascending. As shown in FIG. 8, when descending, the angle A2 between the surface of the loading portion 24 and the surface of the second tip portion 22 and the surface of the screen bar 12 is an acute angle. Further, the first tip portion 21 located at the lower end thereof faces the surface of the screen bar 12 at an angle A1 and projects between the screen bars 12. Therefore, when descending, the rake 11 can push away the dust on the surface of the screen bar 12 while scraping out the dust that has entered the gap of the screen bar 12, and descend the vertical moving portion 10.

Each roller portion 80 is arranged so that the vertical moving portion 10 is aligned with the screen bar 12 when the vertical moving portion 10 is moved up and down, and as shown in FIGS. 8 and 9, the first roller portion 80 is arranged. The roller 25, the second roller 27, the cover 29, and the third tip portion 23 are provided.

As shown in FIG. 8, the first roller 25 includes a flange 26 and rolls on the screen bar 12 when the vertical moving portion 10 descends or rises. The first roller 25 is arranged so as to project above the loading portion 24. The outer peripheral surface of the first roller 25 abuts on the upstream surface of the screen bar 12. On the other hand, the flange 26 is formed coaxially with the first roller 25 and is fixed to the first roller 25, rotates integrally with the first roller 25, and enters the gap between the screen bars 12.
The second roller 27 includes a flange 28 and rolls on the screen bar 12 when the vertical moving portion 10 descends. The first roller 25 and the second roller 27 are rotatably fixed to a shaft arranged between the brackets 81 at both ends of the rake 11 at an appropriate distance. The second roller 27 is formed to have a smaller diameter than the first roller 25, and is arranged in a state of being hidden by the bracket 82. As a result, the angle A2 between the loading portion 24 and the screen bar 12 is made an acute angle when descending. Further, the second roller 27 is protected from dust by a bracket 82.
The outer peripheral surface of the second roller 27 abuts on the upstream surface of the screen bar 12 when descending. On the other hand, the flange 28 is formed coaxially with the second roller 27 and is fixed to the second roller 27, rotates integrally with the second roller 27, and enters the gap between the screen bars 12.
The cover 29 is fixed to the loading portion 24 and covers the upstream side of the first roller 25. A third tip portion 23 is fixed to the end portion of the cover 29.
The third tip 23 is fixed to the end of the cover 29, and as shown in FIG. 9, a comb whose root faces the surface of the screen bar 12 and whose tip enters the gap of the screen bar 12 when ascending. Has teeth.

As shown in FIG. 1, the lever 30 is arranged at the right end of the rake 11. The lever 30 is fixed to the bracket 81 and projects in a direction perpendicular to the mounting surface of the loading portion 24 as shown in FIGS. 8 and 9. A connecting portion with the second striatum 41 is formed at the tip end portion of the lever 30.

The lever 30 included in the vertical moving portion 10 is in a state of projecting to the upstream side in the descending posture shown in FIG. FIG. 9 shows a state in which the second striatum 41 is pulled up, the vertical moving portion 10 is rotated around the rotation center of the first roller 25 as a rotation axis, and the vertical moving portion 10 is in an upward ascending posture in the vertical direction. Since the round steel 84 is fixed between the brackets 81 at both ends of the vertical moving portion 10, the vertical moving portion may occur because the lever 30 is formed only on one end of the rake 11. The twist of 10 is prevented.

The vertical drive unit 100 shown in FIG. 1 is a device that moves the vertical movement unit 10 up and down along the screen bar 12.
The vertical drive unit 100 is a rotary drive unit that winds up or rewinds two first striatum 40, a second striatum 41, a first striatum 40, and a second striatum. It has 50 and pulleys 54, 61, 63, 64 and 66. The rotation drive unit 50 includes a motor 53, a first winding unit 51, and a second winding unit 52.
As shown in FIGS. 8 and 9, one end of the first striatum 40 is connected to the position of the rotation center axis of the first roller 25 of the vertical moving portion 10, respectively. The other end of each first striatum 40 passes through a pulley 54 rotatably arranged about a horizontal axis on the upper part of the main frame 1 as shown in FIG. It is connected to the take-up section 51.

As shown in FIGS. 8 and 9, one end of the second striatum 41 is connected to the connecting portion of the lever 30.

As shown in FIG. 1, the other end of the second striatum 41 passes through the pulley 66, the pulley 64, the pulley 63, the pulley 62, and the pulley 61 in this order, and the second winding portion 52. It is connected to the. The outer peripheral diameter of the portion of the second winding portion 52 for winding the second striatum 41 is equal to the outer peripheral diameter of the portion of the first winding portion 51 for winding the first striatum 40. The pulley 66 is the upper part of the main frame 1 and is rotatably fixed above the lever 30 in the front view of FIG. 1 with the horizontal axis as the center. The pulley 64 is the upper part of the main frame 1 and is rotatably fixed to the right side of the pulley 66 in the side view of FIG. 2 about a vertical axis. The pulley 63 is the upper part of the main frame 1 and is rotatably fixed to the left side of the pulley 64 in the front view of FIG. 1 about the anteroposterior axis of FIG. The pulley 61 is the upper part of the main frame 1 and is rotatably fixed to the left side of the pulley 63 with a predetermined distance from the pulley 63 and about the anteroposterior axis in FIG. The pulley 62 is located below between the pulleys 63 and 61, at the other end of the telescopic actuator 67, one end of which is connected to the mainframe 1, rotatably about the anteroposterior axis of FIG. It is arranged so that it can be moved up and down.

The first winding unit 51 and the second winding unit 52 constituting the rotation driving unit 50 are fixed to the same shaft driven by the motor 53. The motor 53 is fixed to the main frame 1.

Next, the vertical movement of the vertical movement unit 10 by the vertical drive unit 100 will be described.
The first striatum 40 and the second striatum are driven by driving the motor 53 to rotate the first winding section 51 and the second winding section 52 in the winding direction or the rewinding direction. The amount of the body 41 unwound from the first winding unit 51 and the second winding unit 52 can be adjusted.
Since the rotation speed and the outer peripheral diameter of the first winding portion 51 and the second winding portion 52 are the same, the amount of winding or rewinding by the first winding portion 51 and the second winding portion 52 is the same. do.

When the first winding portion 51 and the second winding portion 52 are rotated in the winding direction, the first striatum 40 and the second striatum 41 become the first winding portion 51 and the second winding portion 51. The amount unwound from the take-up portion 52 of the above is shortened. As a result, the vertical moving portion 10 connected to the first striatum 40 and the second striatum 41 is pulled upward without changing the posture. Further, when the first winding portion 51 and the second winding portion 52 are rotated in the rewinding direction, the first striatum 40 and the second striatum 41 become the first winding portion 51 and the first winding portion 51. The amount unwound from the second winding unit 52 becomes longer, and the vertical moving unit 10 moves downward by its own weight without changing its posture.

The posture changing unit 120 shown in FIG. 1 is a device that switches the posture of the vertical moving unit 10 between the descending posture shown in FIG. 8 and the ascending posture shown in FIG. The descending posture is a posture that pushes away the dust and facilitates entry of water, and the ascending posture is a posture that facilitates scooping up the dust with the rake 11. The posture changing unit 120 includes a pulley 62 and an actuator 67 that adjusts the position of the pulley 62 by expanding and contracting.
When the pulley 62 is moved up and down by expanding and contracting the actuator 67, the length of the path of the second striatum 41 from the second winding portion 52 to the lever 30 is changed. By moving the pulley 62 up and down, as the length of the path is changed, only the position of the connection portion of the second striatum 41 with the lever 30 moves up and down, and the up and down movement portion. The posture of 10 will be changed.

That is, when the pulley 62 is lowered, the path of the second striatum 41 becomes longer and the lever 30 is pulled up, but the first roller 25 hits the upstream surface of the screen bar 12 due to the weight of the vertical moving portion 10. Since the state of contact is maintained, the vertical moving portion 10 rotates with the rotation center of the first roller 25 as the rotation axis. Further, when the pulley 62 is raised, the path of the second striatum 41 is shortened, and the lever 30 is lowered by the weight of the vertical moving portion 10 with the rotation center of the first roller 25 as the rotation axis. The position where the second roller 27 abuts on the upstream surface of the screen bar 12 is the lower limit position for lowering. Further, as described above, since the winding amount and the rewinding amount of the first winding unit 51 and the second winding unit 52 are the same, the vertical moving unit 10 is moving up and down, that is, the first. Even while the winding unit 51 and the second winding unit 52 are rotating, the posture of the vertical moving unit 10 can be changed by moving the pulley 62 up and down.

The lowering posture is a state in which the pulley 62 is raised to lower the lever 30 and the first roller 25 and the second roller 27 are in contact with the upstream surface of the screen bar 12, as shown in FIG. At this time, the angle formed by the surface of the first tip portion 21 and the upstream surface of the screen bar 12 of the rake 11 of the vertical moving portion 10 becomes an acute angle when the vertical moving portion 10 is descending. The tip of the first tip 21 is in the gap of the screen bar 12. Further, the angle formed by the surface of the loading portion 24, the surface of the second tip portion 22, and the upstream surface of the screen bar 12 becomes an acute angle when the vertical moving portion 10 is lowered.

The ascending posture is a state in which the surface of the loading portion 24 is lower on the second tip side than on the first tip side, as shown in FIG. 9 by lowering the pulley 62 and raising the lever 30. At this time, the angle formed by the surface of the second tip portion 22 of the vertical moving portion 10 and the upstream surface of the screen bar 12 becomes an acute angle when the vertical moving portion 10 is raised. The tip of the second tip 22 is in the gap of the screen bar 12.

The discharge unit 70 shown in FIG. 2 is a device for discharging the dust loaded on the rake 11, and has a discharge actuator 71, a discharge arm 74, and a dust receiving unit 73.
As shown in FIG. 2, the discharge lever 72 is connected to the discharge arm 74. The upper end of the discharge arm 74 is rotatably fixed to the main frame 1, and the bent portion is connected to one end of the discharge actuator 71. The other end of the discharge actuator 71 is connected to the main frame 1, and the discharge actuator 71 expands and contracts. The discharge lever 72 is arranged at a position that supports the two roller portions 80 from below when the vertical moving portion 10 is raised. The state in which the discharge actuator 71 is extended is shown in FIGS. 2 to 6, and the upstream side surface of the discharge lever 72 is on the extension surface of the upstream surface of the screen bar 12. The state in which the discharge actuator 71 is retracted is the state shown in FIG. 7, and the upstream side surface of the discharge lever 72 is vertical. A dust receiving portion 73 for receiving dust is formed below the discharge lever 72.

Next, the operation of the discharging unit 70 to discharge the dust loaded on the loading unit 24 of the vertical moving unit 10 will be described.
While the vertical moving portion 10 is maintained in the ascending posture, that is, with the pulley 62 lowered, the first winding portion 51 and the second winding portion 52 are rotated in the winding direction to rotate the vertical moving portion 10 in the vertical moving portion 10. Is raised to the state shown in FIG. 6, and then the discharge actuator 71 connected to the discharge arm 74 and the main frame 1 is contracted. Further, when the pulley 62 is raised and the vertical moving portion 10 is in the descending posture, the vertical moving portion 10 supported by the discharge lever 72 is lowered by its own weight, and the vertical moving portion 10 is further in the descending posture. The surface of the loading unit 24 is also vertical, and the dust loaded on the loading unit 24 falls due to its own weight.

Next, the operation of the dust removing device having the above configuration to remove the dust accumulated on the screen bar 12 will be described.
The operation of the dust removing device is executed in response to instructions for rotational drive of the motor 53, expansion and contraction of the actuator 67, and expansion and contraction of the discharge actuator 71 from a console (not shown).
The state shown in FIG. 2 is a state before the vertical moving portion 10 is lowered from the standby position and put into the water surface. The standby state of the dust removing device (not shown) is a state in which the vertical moving portion 10 is located at the position shown in FIG. 6 and the vertical moving portion 10 is maintained in the descending posture. The vertical moving portion 10 is located higher than the water surface and maintains the descending posture. At this time, dust is accumulated on the upstream side of the screen bar 12. It is assumed that the dust adheres to the surface of the screen bar 12 and fills the water surface in the vicinity of the screen bar 12 due to the influence of the water flow.

As a first step, in order to remove dust, as shown in FIG. 3, a motor 53 is driven, and the first winding section 51 and the second winding section 52 are rotated in the rewinding direction to move up and down. The moving portion 10 is lowered by its own weight. At this time, since the pulley 62 is not moved up and down, the up and down moving portion 10 maintains the posture when descending. Then, as shown in FIG. 8, the comb teeth of the first tip portion 21 scrape out the dust stuck in the gap of the screen bar 12. Further, since the surface of the first tip portion 21, the surface of the second tip portion 22, and the surface of the loading portion 24 have an acute angle with respect to the upstream surface of the screen bar 12, the surface of the screen bar 12 is on the upstream surface. The accumulated dust is moved upstream by the wedge effect. That is, the vertical moving portion 10 pushes away the dust and descends due to its own weight. As a result, even if the dust fills the water surface near the screen bar 12, the vertical moving portion 10 can be lowered below the water surface.
Since the first tip portion 21 is also present below the roller portion 80, the dust pushed to the upstream side by the first tip portion 21 is further pushed to the upstream side by the cover 29. As a result, the dust is prevented from entering between the screen bar 12 and the first roller 25. That is, the first roller 25 is lifted from the screen bar 12 by dust, and the flange 26 is prevented from coming off the gap of the screen bar 12.

As a second step, as shown in FIG. 3, when the vertical movement unit 10 reaches the bottom of the intake port, which is the lower limit of the vertical movement, the motor 53 is stopped and the vertical movement of the vertical movement unit 10 is stopped. do. Next, by lowering the pulley 62 and lengthening the path of the second striatum 41, the lever 30 is pulled up by a predetermined amount, and as shown in FIGS. 4 and 9, when the vertical moving portion 10 is raised. Put it in a posture. At this time, since the water flow flowing through the intake port is not stopped, the dust pushed away from the upstream surface of the screen bar 12 in the first step is moved to the upstream surface of the screen bar 12 again.

As a third step, as shown in FIG. 5, the motor 53 is driven while the vertical moving portion 10 is kept in the ascending posture without moving the pulley 62, and the first winding portion 51 and the second winding portion 51 are wound. The take-up portion 52 is rotated in the take-up direction. Then, as shown in FIG. 9, the comb teeth of the second tip portion 22 scrape out the dust stuck in the gap of the screen bar 12. Further, since the surface of the second tip portion 22 has an acute angle with respect to the upstream surface of the screen bar 12, the dust accumulated on the upstream surface of the screen bar 12 is moved to the upstream side again by the wedge effect. The moved dust is scooped up by the loading portion 24, that is, the rake 11, and is placed on the mounting surface. The surface of the loading portion 24 is higher on the side of the first tip portion 21, and the dust placed on the mounting surface of the loading portion 24 is in a state of being less likely to spill.

Further, the third tip portion 23 arranged above the roller portion 80 pushes away the dust accumulated on the upstream side surface of the screen bar 12, puts it on the cover 29, or pushes it to the upstream side, so that the dust is collected. Prevents the first roller 25 from entering between the upstream surface of the screen bar 12 and the first roller 25, and prevents the first roller 25 from being lifted from the screen bar 12 by dust and the flange 26 from coming off the gap of the screen bar 12. do.

Here, assuming that the second striatum 41 is located at the center in the longitudinal direction of the vertical moving portion 10, if the length of the dust is close to the length in the longitudinal direction of the rake 11, the second striatum 41 is the second. The striatum 41 of 2 makes it impossible to load the dust on the loading unit 24. However, since the second striatum 41 is connected to the end of the vertical moving portion 10, the dust can be loaded on the loading portion 24. Therefore, even long dust can be removed.

As a fourth step, the vertical moving portion 10 is further raised to the state shown in FIG. At this time, the vertical moving portion 10 is in a state of being supported from below by the discharge lever 72.

As a fifth step, the discharge actuator 71 is contracted, and as shown in FIG. 7, the discharge arm 74 is moved so that the upstream surface of the discharge lever 72 is in a vertical position. The vertical moving portion 10 mounted on the discharge lever 72 also moves downward. Further, when the pulley 62 is raised and the vertical moving portion 10 is in the lowered posture, the loading portion 24 becomes vertical. As a result, the dust on the vertically moving part falls due to its own weight. The fallen dust enters the dust receiving portion 73 arranged at the lower part thereof. The dust that has entered the dust receiving portion 73 is discharged to the outside by a conveyor or the like (not shown).

As described above, the step of removing the dust accumulated on the upstream surface of the screen bar 12 is completed, but if the accumulated dust is large, the dust on the water surface and underwater that could not be removed in the third step can be completed. However, due to the water flow, it will be deposited on the upstream surface of the screen bar 12. Therefore, by repeating the first step to the fifth step until these dusts are eliminated, it is possible to remove a large amount of dusts accumulated on the upstream side of the screen bar 12.

The present invention allows for various embodiments and modifications without departing from the broad spirit and scope of the invention. The embodiments described above are for the purpose of explaining the present invention and do not limit the scope of the present invention.

1 Mainframe 10 Vertical movement part 11 Lake 12 Screen bar 21 First tip part 22 Second tip part 23 Third tip part 24 Loading part 25 First roller 26, 28 Flange 27 Second roller 29 Cover 30 Lever 40 1st striatum 41 2nd striatum 51 1st winding part 52 2nd winding part 61, 62, 63, 64, 66 Pulley 70 Discharge part 71 Discharge actuator 72 Discharge lever 73 Dust Receiving part 74 Discharge arm 80 Roller part 81, 82, 83 Bracket 100 Vertical drive part 120 Posture change part

Claims (7)

A device that removes dust accumulated on the upstream side of the screen bar.
A vertical moving portion that moves vertically along the screen bar on the upstream side of the screen bar,
A vertical drive unit that lowers or raises the vertical movement unit,
A posture changing portion that causes the vertical moving portion to be in the descending posture when the vertical moving portion is lowered, and a posture changing portion that causes the vertical moving portion to be in the ascending posture when the vertical moving portion is raised.
Have,
The vertical movement part has a substantially rectangular shape in plan view, the rake having a stacking section for stacking dust, lower lateral side extending in the lateral direction intersecting with the vertical direction in a plan view of the rake a first tip portion arranged to project to the side portions extend in the vertical and horizontal direction intersecting said rake protrudes upward direction side portion facing the lower side portion With a second tip, which is located,
In the descending posture, the first tip portion is in a state of being close to the surface on the upstream side of the screen bar, and the upper side between the surface of the first tip portion and the surface on the upstream side of the screen bar. upper angle between the upper angles, and the second tip surface and the screen bars upstream of the surface of between the upstream side of the surface of the angle of the surface with the screen bars of the loading portion Are sharp angles,
In the ascending posture, the second tip portion is in a state of being close to the surface on the upstream side of the screen bar, and the lower side between the surface of the second tip portion and the surface on the upstream side of the screen bar. The angle of is sharp, and the loading portion is lower on the second tip side than on the first tip side.
Dust removal device. The first tip portion has a portion that enters the gap of the screen bar when in the descending posture.
The second tip portion has a portion that enters the gap of the screen bar in the ascending posture.
The dust removing device according to claim 1, wherein the dust removing device is characterized by the above. The vertical movement portion further
It has a first roller with a flange that goes into the gap of the screen bar,
It has a cover on the upstream side of the first roller.
The dust removing device according to claim 1 or 2, wherein the device is characterized by the above. The vertical moving portion further, when in the descending posture,
It has a second roller with a flange that goes into the gap of the screen bar,
The first tip portion is arranged on the upstream side of the second roller.
The dust removing device according to claim 3, wherein the dust removing device is characterized by the above. The vertical drive unit has a rotary drive unit and has a rotary drive unit.
It has a first striatum in which one end is connected to the rotary drive unit and the other end is connected to the vertical movement unit.
The vertical movement unit is moved up and down by winding or rewinding the first striatum with the rotation drive unit.
The dust removing device according to any one of claims 1 to 4, wherein the dust removing device is characterized by the above. The posture changing portion has a second striatum in which one end is connected to the rotation driving portion and the other end is connected to the vertical moving portion.
By changing the length of the path of the second striatum, the descending posture and the ascending posture are switched.
The dust removing device according to claim 5, wherein the dust removing device is characterized in that. The second striatum is connected to one end of the vertical moving portion.
The dust removing device according to claim 6, wherein the dust removing device is characterized in that.

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