JP2002285528A - Rake attached dust catcher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rake attached dust catcher capable of efficiently removing earth and sand accumulated on an upstream side of a screen. SOLUTION: A negative pressure pump 26 is provided to a main pipe line 2 as an accumulated earth and sand removing device 21. A first branch pipe line 29 is provided to a site capable of generating the negative pressure at a downstream side thereof to engage a main opening 29A of the first branch pipe line with a rake 3 to make a rising and falling motion. Second and third branch pipe lines 30 and 31 are provided to the downstream side of the first branch pipe line 29. A switching means 36 is provided the pipe lines, and a first operation state for stirring the accumulated earth and sand by jetting a pressure fluid of the main pipe line 25 through a nozzle 29Aa of the first branch pipe line 29, a second operation state for discharging the earth and sand absorbed by the main opening 29A discharged to an upstream side of a channel through a second opening 30A of the second branch pipe line 30 and a third operation state for discharging the earth and sand absorbed by the main opening 29A to the upstream side of the channel from the second branch pipe line 30 and, at the same time, circulating a flowing water into the main pipe line 25 through the third branch pipe line 31 can be selected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rake-equipped dust remover which is installed in a water channel of a water treatment facility or the like, catches dust and the like in flowing water flowing through the water channel, and scrapes it off with a rake.

[0002]

2. Description of the Related Art Conventionally, as this type of dust remover, for example, there is one shown in FIG. The dust remover 1 has, for example, a grid-like screen 2 arranged in a water channel in a direction substantially perpendicular to the direction of the water flow, and a rake 3 on the upstream side of the screen 2.
Is moved along the screen 2 to scrape off dust and the like trapped by the screen 2. In the scraping device 4, a pair of side plates 5, 5 is disposed substantially in parallel with the screen 2 on the upstream side of the screen 2, and pin racks 6, 6 are provided on the opposing surfaces of the pair of side plates 5, 5 along the longitudinal direction. 6 are attached respectively. Therefore, in each side plate 5, a guide rail 9 formed of a track-like groove for rotating the rake 3 pinion 8 and the like in one direction is formed between the inner walls 5a and 5b of the side plate 5 and the pin rack 6 in a substantially ring shape. Have been. The guide rail 9 has two grooves 9a, 9b substantially parallel to the screen 2 with the pin rack 6 interposed therebetween, and the U-shaped grooves 9d, 9e at the upper and lower ends of the pin rack 6 are connected in a U-shaped manner. Moreover, at the upper end of each side plate 5, one of the grooves 9a located on the upstream side of the guide rail 9 is inserted into a U-shaped groove 9d.
An extension groove 9c that extends further upward and is bent or curved upstream is added.

The rake 3 has a comb-like shape for scraping dust and the like attached to the screen 2.
Is connected to, for example, a substantially L-shaped rake table 12. A pair of rake tables 12 are provided inside the pair of side plates 5 and 5 so as to be connected to each other. In addition, each rake table 12 is provided at its upper end with a sub-guide roller 13 that is movable by being inserted into the groove 9a on the upstream side of the guide rail 9. A main guide roller 14 is movably fitted to the guide rail 9 in the vicinity of the other end of the rake table 12, and the pinion 8 is engaged with the pin rack 6 and moves around the pin rack 6 while rotating. Is supported.
The pair of pinions 8, 8 are connected to a drive unit such as a motor (not shown). In the raising and lowering process of the rake 3, the sub guide roller 13 moves in the upstream groove 9a, and the main guide roller 14 moves in the groove 9a in the lowering process and moves in the downstream groove 9b in the ascending stroke. Pinion 8 is main guide roller 1
4 and move together. Above the screen 2, there is provided a wiper 15 for removing dust and the like J on the rake 3 which has risen to a position A indicated by a two-dot chain line, and the wiper 15 is attached to the outside of the pair of side plates 5, 5. Or it may be attached to another mechanism. Under the wiper 15, a collecting means 16 for the removed dust and the like is provided. In the example shown in the figure, a transport mechanism in which a conveyor belt, rollers, and the like are arranged is provided as the collection means 16, and the collected dust and the like are transported from the water channel and collected. In addition, the side plate 5 shall be located above the water surface.

[0004] The dust remover 1 has the above-described configuration.
When scraping dust and the like by the rake 3, first, the sub and main guide rollers 13 and 14 of the rake table 12 are mounted in the grooves 9 a on the upstream side of the guide rail 9. As a result, the rake table 12 is inclined downward with the rake arm 11 toward the upstream side of the water channel, as indicated by the two-dot chain line in the figure, and the rake 3 is separated from the screen 3. When the pinion 8 is rotated counterclockwise in FIG. 6 by a drive unit (not shown) in this state, the pinion 8 moves downward along the pin rack 6, so that the rake table 12 also descends integrally with the rake 3. When the pinion 8 reaches the lower end of the guide rail 9, the rake 3 rotates through the rake arm 11 because the main guide roller 14 moves from the upstream groove 9a to the downstream groove 9b via the U-shaped groove 9e. 6 and moves from the position indicated by the two-dot chain line to the position indicated by the solid line in FIG.

When the pinion 8 further rotates in the same direction, the pinion 8 moves up along the groove 9b together with the main guide roller 14 while being engaged with the pin rack 6, while the sub guide roller 13 moves up the groove 9a. As a result, the rake 3 rises while being in contact with the screen 2, so that the dust and the like J attached to the screen 2 can be scraped off. While the pinion 8 rises along the groove 9a to the upper end of the pin rack 6, the dust or the like J on the rake 3 that has risen above the water surface is removed by the wiper 15, dropped by the collection means 16, conveyed, and collected. Then, the auxiliary guide roller 13 rises from the groove 9a to the extension groove 9c, and the main guide roller 14 moves together with the pinion 8 in the U-shaped groove 9d from the groove 9b to the groove 9a to return to the original position. In this manner, the rake table 12 circulates along the guide rail 9, and the rake 3 moves up and down.

[0006]

By the way, in such a dust remover 1, near the upstream side of the screen 2, the water bottom B
Sediment D containing garbage and the like accumulates on the ground. In this case, rake 3
The U-shaped groove 9e is inserted at the lowermost point of
When the rake passes, the rake 3 makes contact with the screen 3 while rotating as shown in FIG. 6, but if the rake 3 rotates at this time to expose the bottom B of the water channel, the rake 3 is easily damaged and the life is shortened. Therefore, the rake 3 moves at a position slightly separated from the bottom of the waterway. Therefore, the sediment D deposited on the channel bottom B cannot be collected. In addition, if the amount of sediment D increases, the rake 3 comes into contact with the rake 3 to damage the rake 3 or hinder the operation of the rake 3, thereby hindering the operation of the dust remover 1. .
In such a case, conventionally, it is necessary to lower the water level of the water channel on the upstream side of the screen 2 or stop the water, and remove the sediment D by manpower to recover the water. Was bad. In particular, especially in a water channel provided with a dust remover near a water intake of a river, a gate or a corner dropping facility is often not provided upstream of the dust remover. Therefore, a large amount of work and equipment are required for the above-mentioned work of removing the sediment D and restoration of the operation of the dust remover, resulting in poor operation efficiency and economic efficiency.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rake-equipped dust remover capable of easily and efficiently removing sedimentary sediment that hinders dust removal work.

[0008]

SUMMARY OF THE INVENTION A rake dust remover according to the present invention communicates with a rake that moves up and down along a screen provided in a water channel, a pipeline to which a pressure fluid is supplied, and the pipeline. The rake has a main opening interlocked with the raising and lowering of the rake, and a negative pressure pump that sets the inside of the pipeline to a negative pressure by a pressure fluid and sucks earth and sand from the main opening by the negative pressure,
It is characterized in that soil and the like sucked from the main opening are discharged from another opening of the pipeline. In the present invention, with respect to the main opening linked to the elevation of the rake, if the suction force is applied by a negative pressure pump at a position where the rake descends to the vicinity of the lowest point, the sediment deposited on the bottom of a water channel or the like near the screen is opened. From the bottom of the screen or the like by removing it from the other opening of the pipeline. This makes it possible to suppress the contact of the sediment with the rake and remove the sediment without stopping the operation of the dust remover. The term "negative pressure pump" as used in the present invention refers to a means for setting a negative pressure in a pipeline using a pressure fluid, and includes a sand removing pump, an ejector pump, a piston pump, and the like. Preferably, the negative pressure pump and its driving source are provided separately, so that the pipeline including the negative pressure pump can be connected to a low strength place such as a rake or a rake arm, and has a main opening interlocked with the rake or the like. The lifting operation of the pipeline is facilitated.

The other opening is a second opening provided on the upstream side of the rake, and the earth and the like discharged into the water channel from the second opening may be collected by the rake. The sediment sucked at the main opening is discharged from the second opening provided on the upstream side of the rake, and re-entered into the water channel.This sediment flows from the upstream side of the water channel toward the screen, and is captured by the screen before being raked. Can be recovered. Therefore, the sediment can be circulated in the channel from the main opening through the second opening, and can be collected by the screen. Therefore, the removal efficiency of sediment can be enhanced. The sediment sucked in the main opening and flowing through the pipeline contains mixed fluid such as pressure fluid and flowing water from the channel, and separates the pressure fluid and flowing water from the sediment before discharging the sediment from the second opening. Only the second fluid may be discharged from the second opening, or the pressurized fluid or running water may be discharged together with the earth and sand from the second opening. In the former case, the weight can be reduced by solid-liquid separation, and the efficiency of circulating and transporting the earth and sand is improved. In the latter case, since the earth and sand can be transported on the water flow, there is an advantage that the earth and the like are hardly clogged in the pipeline and the flow velocity of the earth and sand in the pipeline can be increased.

The pipeline includes a main pipeline for supplying a pressure fluid to the negative pressure pump, and a first branch pipeline branched from the main pipeline in the area of the negative pressure pump and communicating with a main opening for applying a suction force. And, a main branch is branched on the downstream side of the negative pressure pump, and a second branch line and a third branch line provided with a second opening as another opening are respectively provided, and a third branch line is provided. The branch pipe may be provided with a filter member that allows only a fluid to pass therethrough, and earth and sand sucked from the main opening may be discharged from the second opening of the second branch pipe. Thereby, the sediment sucked from the main opening and mixed with the pressure fluid is separated into solid and liquid by the filter member, the fluid flows through the third branch conduit, and the sediment flows through the second branch conduit and flows from the second opening. Is discharged. Therefore, the earth and sand separated from the fluid can be reduced in weight, and the efficiency of the circulating conveyance to the second opening is improved. The fluid separated by the filter member and flowing through the third branch line may be circulated and then re-entered into the line.

A dust remover with a rake according to the present invention is provided with a rake that rises and falls along a screen provided in a water channel, a pipeline to which a pressurized fluid is supplied, and communicates with the pipeline to interlock with the elevation of the rake. And a main opening for discharging the pressurized fluid supplied into the conduit from the main opening to disturb sediment and the like accumulated in the water channel. For the main opening linked to the rake up and down, if the rake discharges the pressure fluid at the position where the rake has dropped near the lowest point,
Sediment containing dust and the like deposited on the bottom of a water channel or the like near the screen can be disturbed and scattered, and the soared soil can be captured by the screen and scraped off by a rake. In this way, sediment accumulation can be suppressed. Note that the main opening may be disposed so as to face the water bottom near the lowest point of the rake. Thereby, the stirring efficiency can be improved. Further, the tip of the main opening may be set to have a nozzle shape by reducing the diameter. As a result, the pressure fluid at the time of discharge can be set to a high-pressure injection state, and the blowing velocity can be increased to improve the stirring effect.

The dust remover with a rake according to the present invention further comprises: a rake that moves up and down along a screen provided in a water channel;
A main line for supplying the pressure fluid to the negative pressure pump, and a main opening branched from the main line in the area of the negative pressure pump and interlocking with the elevation of the rake. And a rake provided with a second branch line and a third branch line having a second opening, the main line being branched downstream of the negative pressure pump. A dust remover, comprising: a first operating state in which a pressurized fluid is discharged from a main opening of a first branch line and the second and third branch lines are closed; A second operating state in which the earth and the like sucked from the opening is discharged from the second opening of the second branch line and the third branch line is closed, and a filter that allows the pressure fluid to pass through the third branch line At the same time as mounting the member, soil and the like sucked from the main opening of the first branch line Characterized in that it comprises at least switching means settable to one of a third operating state of discharging from the second opening. By operating the switching means, it is possible to set and operate at least one of the first to third operation states. In this case, the operation may be selectively switched. For example, if all of the first to third operation states can be selected, the switching operation is performed to remove the sediment deposited in the vicinity of the screen. One of the operation states can be selected according to the state. Alternatively, even if it is not possible to select all of the first to third operating states, for example, if only the first and second operating states can be selected by the switching means, if only the second and third operating states can be selected, Even when only the first and third operating states can be selected, the switching operation can be selectively performed. Alternatively, only one of the operating states may be selected and set.

In each of the above-mentioned inventions, the discharge operation and the suction operation of the pressure fluid acting on the main opening can be performed continuously in the rake elevating step, but may be performed intermittently. It is preferable to operate intermittently for efficient operation and work, thereby reducing running costs. For example, the pressure fluid may be discharged from the main opening at a position near the lower end of the rake elevating step. Alternatively, a suction force may be applied with the main opening facing the earth and sand at a position near the lower end of the rake elevating step. At other positions in the rake elevating process, the discharge of the pressurized fluid from the main opening and the action of the suction force to the main opening may be stopped.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the accompanying drawings. The same parts and members as those of the above-mentioned prior art are denoted by the same reference numerals, and description thereof will be omitted. 1 to 5 show a pipe configuration of a sediment removal apparatus 21 in a dust remover according to an embodiment. FIG. 1 is a schematic diagram showing a basic configuration of a pipe, and FIG. 2 shows a first operation state. FIG. 3 is a partially enlarged view of FIG. 2 showing an operating state of the rake and the main opening, FIG. 4 is a schematic view showing a second operating state, and FIG. 5 is a schematic view showing a third operating state. . The dust remover 20 with a rake according to the present embodiment has a configuration in which a sediment removal device 21 is added to the dust remover 1 shown in FIG. Therefore, in the present invention, the dust remover 1 shown in FIG. 6 is defined as the dust remover 1, and the dust remover 1 with the sediment removal device 21 added thereto is defined as the rake-equipped dust remover 20. However, in the dust remover with rake 20 shown in FIGS. 1 to 5, only the sediment removal device 21 is shown, and the dust remover 1 is omitted except for the screen 2 and the rake 3.

In the sediment removal device 21 of the rake-equipped dust remover 20 shown in FIG. 1, a pressure fluid is supplied from a pressure fluid supply source (not shown) to a pump P through a supply pipe 24 and is pressurized by the pump P. The pressure fluid will be supplied to the negative pressure pump 26 through the main line 25. It is preferable that a filter member 27 is attached to the main pipe 25 between the pump P and the negative pressure pump 26. The negative pressure pump 26 is a negative pressure generating means for generating a low pressure such as a negative pressure on the downstream side, and widely includes a sand removing pump, a pump with an ejector, a piston pump, and the like. The first branch line 29 is branched from the main line 25 in a region where a negative pressure is generated on the downstream side of the negative pressure pump 26. The first branch line 29 is connected to the rake arm 11 at least halfway in the longitudinal direction. The rake arm 11 extends along the rake arm 11, and a main opening 29A is provided near the rake 3. Therefore, the main opening 29A moves up and down in conjunction with the raising and lowering operation of the rake 3, and the pressure fluid is transferred near the lowermost point of the lowering process of the rake 3 to the channel bottom B.
To the sediment D, or the sediment D
The operation of sucking the water can be selectively performed.

When the main opening 29A is used as a suction port, as shown in FIG. 1, the end of the first branch pipe 29 is fixed substantially in parallel with the end of the rake arm 11, and
9A is preferably disposed so as to be located in the vicinity of the rake 3 and to face the water channel bottom surface B. In contrast, the main opening 29A
Is used as a pressure fluid injection port, a nozzle portion 29Aa having a tapered diameter with respect to the first branch pipe line 29 may be attached to the main opening 29A as shown in FIGS. Moreover, the distal end of the first branch pipe 29 is substantially L-shaped along the rake arm 11 and the rake 3 which are connected in a substantially L-shape.
The nozzle portion 29Aa is fixed to the rake arm 1 and the rake 3 in a state of being bent in a character shape, and the nozzle portion 29Aa is directed in the extending direction of the rake 3. In addition, the first branch pipe 29 including the main opening 29A is preferably set to be lightweight so as to be at least partially attached to the rake 3 or the rake arm 11 having low strength. Therefore, the negative pressure pump 26 located in the vicinity of the branch portion of the first branch pipe 29 is driven by the pump P
It is preferable that the drive source such as the pump P is provided on a base (not shown) or a separate base of the dust remover 1, for example.

The main conduit 25 is branched into a plurality of branches, for example, bifurcated on the further downstream side of the branch position of the first branch conduit 29, one of which becomes the second branch conduit 30 and the other of which becomes the third branch conduit 31. The second branch conduit 30 has a second opening 30A at the end located below the water surface and located upstream of the screen 2 and the rake 3, and constitutes a discharge port for discharging the sediment D and the like sucked at the main opening 29A. I do. The third branch conduit 31 has a configuration in which the third branch conduit 31 is connected to, for example, a pump P via a filter member 32 and circulates. And supply it to the main conduit 25 again. Alternatively, the distal end opening of the third branch conduit 31 may be positioned below the water surface and returned to the water channel. Further, a first switching valve 34 is provided in the main conduit 25 between the branch of the first branch conduit 29 and the branch of the second branch conduit 30. The first switching valve 34 switches the opening and closing of the main pipeline 25 in this portion. The third branch pipe 31 is provided with a second switching valve 35 on the upstream side of the filter member 32. The third branch conduit 31 is opened and closed by the second switching valve 35. The first and second switching valves 34 and 35 constitute switching means 36, and can open and close the first and second switching valves 34 and 35 integrally or individually. The first and second switching valves 34,
35 may be operated manually or may be automatically activated by control means (not shown).

The dust remover 20 with a rake according to the present embodiment.
Has the above-described configuration, and the operation method will be described with reference to FIGS. In the first operating state, first, as shown in FIG. 2, the first switching valve 34 closes the main line 25 on the downstream side of the first branch line 29. The dust remover 20 is operated in this state. In this case, by driving the pinion 8 as shown in FIG. 6, the pinion 8 goes around the pin rack 6 and the main guide roller 14 also goes around the guide rail 9 integrally with the pinion 8. At this time, the sub guide roller 13 reciprocates in the groove 9a on the upstream side of the guide rail 9. As a result, the rake table 12 moves up and down,
The rake 3 also moves up and down via the rake arm 11. Then, as the pinion 8 moves down along the upstream groove 9a, the rake 3 is held in a state of being separated from the screen 2 and descends, and the nozzle 29Aa of the first branch pipe 29 and the main opening 29A also moves down. It descends in conjunction with. When pressure fluid is supplied from the pump P to the main line 25 at a position where the rake 3 has moved near the lowest point of the descending motion as shown by a two-dot chain line in FIG. 3, the flow velocity increases through the negative pressure pump 26. The gas flows through the first branch pipe 29 and is jetted from the nozzle 29Aa at a higher speed.

At this time, the rake 3 and the nozzle 29Aa face diagonally downward because the pinion 8 is near the lower end of the groove 9a on the upstream side and the rake arm 11 is held in a state of being inclined upstream with respect to the screen 2. As a result, a high-speed pressure fluid can be jetted toward the sediment D deposited on the bottom B of the upstream channel of the screen 2 (see FIG. 3).
Then, the sediment D is disturbed and soars upwards, and the sediment D gets on the screen 2 along the water flow.
Part of the soil D scatters around. Then pinion 8
At the same time, the main guide roller 14
The nozzle 29Aa, together with the rake 3, injects a pressurized fluid while moving in a substantially circular arc until passing through the groove 9e and guided by the downstream groove 9b, thereby further disturbing the earth and sand D soaring upward, and 2 is easily captured. The sediment D captured by the screen 2 in this way
The dust and the like J are scraped off by the ascending rake 3, brought up above the water surface, scraped off by the wiper 15 at the position A, and dropped into the collection means 16. When the pinion 8 reaches the groove 9b together with the main guide roller 14, the nozzle 29Aa
The discharge of the pressure fluid from is stopped.

In this manner, the nozzle 29Aa of the first branch pipe 29 moves up and down in conjunction with the up and down movement of the rake 3,
When the nozzle reaches the lowermost point of the descent motion, the nozzle 29Aa
The ejection of the pressure fluid is repeated so as to discharge the pressure fluid from the. Thereby, the sediment D deposited on the channel bottom B can be removed and collected through the dust removing operation of the dust remover 20 without stopping the operation of the dust remover 20, lowering the water level on the upstream side, or stopping water. The ejection of the pressurized fluid from the nozzle 29Aa may be performed continuously during the entire upward and downward movement of the nozzle 29Aa. In this case, when the rake 3 rises while scraping dust and the like of the screen 2, There is a risk that garbage left behind will be pushed to the downstream side, and there is a large loss of energy. Therefore, the intermittent injection in which the rake 3 and the nozzle 29Aa are jetted only when reaching the vicinity of the lowest point of the descending movement is efficient and preferable. Nozzle 29A
The intermittent injection control from a may be controlled so as to operate at predetermined time intervals in synchronization with the up / down movement of the rake 3. Alternatively, a detecting means such as a switch or a sensor may be provided in the vicinity of the U-shaped groove 9e at the lowermost end of the guide rail 9 to detect the descent of the rake 3 near the lowermost point and activate the rake 3.

Next, in the second operating state, the first switching valve 34 is opened and the second switching valve 35 is closed as shown in FIG. In this state, the dust remover 20 is operated in the same manner as in the first operation state, and the first branch pipe 2
9 is moved up and down. And rake 3
Reaches the vicinity of the lowest point of the descending movement, that is, while the pinion 8 moves along the main guide roller 14 in the U-shaped groove 9e at the lowermost end of the guide rail 9, the pressurized fluid is transferred to the main conduit 25.
And the negative pressure pump 26 generates a negative pressure in the main line 25 on the downstream side thereof to apply a suction force due to the negative pressure to the main opening 29A of the first branch line 29. At this time, since the main opening 29A is located near the water channel bottom B together with the rake 3, the sediment D deposited on the water channel bottom B is sucked from the main opening 29A together with the water flow, and is transferred from the first branch pipe 29 to the main pipe 25. Transported,
Further, it is discharged from the second opening 30A below the water surface through the second branch pipe 30 together with the pressure fluid. Since the second opening 30 of the second branch line 30 is located on the upstream side of the screen 2 and the rake 3 and at a relatively shallow depth below the water surface, the sediment D is scattered in the water flow, Most of the dust and the like in the sedimentary sediment D and a part of the sediment are flowed downstream before being deposited on the channel bottom B and captured by the screen 3.

Even if a part of the sediment D accumulates and accumulates again on the channel bottom B upstream of the screen 2, the sediment D is repetitively synchronized with the up-and-down movement of the rake 3 to remove the sediment D from the main opening 29 A. It is sucked and discharged and scattered from the second opening 30A of the second branch conduit 30. Therefore, it is possible to reliably prevent the earth and sand D from constantly accumulating on the upstream side of the screen 2 to prevent the rake 3 from scraping off or being damaged. In particular, in the second operating state, the sediment sediment D sucked in the first branch pipe 29 is discharged from the second branch pipe 30 together with the pressurized fluid and the flowing water in the water channel, thereby smoothly transporting the inside of the pipe. It can discharge at high speed. In addition, the sediment D can be widely dispersed in the water channel through the second branch conduit 30.

Next, as a third operating state, both the first switching valve 34 and the second switching valve 35 are opened as shown in FIG. In this state, the dust remover 20 is operated similarly to the first operation state.
To move the main opening 29A of the first branch pipe 29 up and down in conjunction with the up and down movement of the rake 3. Then, while the rake 3 reaches near the lowest point of the descending movement and the pinion 8 and the main guide roll 14 move in the U-shaped groove 9 e of the guide rail 9, the pressure fluid is supplied to the negative pressure pump 26. A negative pressure is generated to apply a suction force to the main opening 29A of the first branch pipe line 29. Since the main opening 29A is located near the water channel bottom B together with the rake 3, the sediment D deposited on the water channel bottom B is sucked together with the water flow at the main opening 29A and conveyed from the first branch channel 29 to the main channel 25. . Then, the pressurized fluid and the flowing water in the water channel are separated from the earth and sand through the filter member 32, sent to the third branch channel 31, and circulated and supplied to the main channel 25 via the pump P. On the other hand, soil and the like that do not pass through the filter member 32 are discharged into the water channel from the second opening 30 below the water surface through the second branch conduit 30.

Since the second opening 30A of the second branch pipe 30 is located at a relatively shallow depth below the water surface on the upstream side of the screen 2 and the rake 3, the sediment D is scattered in the water flow. Most of the sediment D, dust and the like are washed downstream and are captured by the screen 3 before being deposited on the channel bottom B. Even if the sediment D discharged from the second opening 30A accumulates again on the channel bottom surface B, the sediment D is sucked at the main opening 29A repeatedly in conjunction with the up-and-down movement of the rake 3, and the second branch conduit 30 Will be scattered from the second opening 30A. Therefore, it is possible to reliably prevent the sediment D from being accumulated on the upstream side of the screen 2 to prevent the rake 3 from scraping off or being damaged. In particular, in the third operation state, the flowing water is separated from the sucked sediment D and transported to the separate branch pipes 30 and 31, respectively, so that the pressurized fluid and the flowing water in the pipes become the third branch pipe. By circulating through 31, efficient water flow reuse is possible.

In the above-mentioned second or third operation state, the suction force is applied to the main opening 29A of the first branch pipe 29 because the sediment D near the lowest point of the descending movement of the rake 3. It is preferable that only the region where the main opening 29A comes closest is used, and the intermittent operation in which no suction force is applied is performed in the other vertical movement regions. Also, the first and second switching valves 34 and 35 are provided as the switching means 36 so that three types of operating states can be realized. However, the present invention is not limited to this, and any one or more operating states can be set. It just needs to be realized. For this purpose, the switching valve is not necessarily required, or it is sufficient that only one switching valve is provided to realize two kinds of operating states. In the second or third operating state,
When discharging the earth and sand D from the second opening 30A, the earth and sand D need not always be returned to the water channel and circulated, and may be collected by the collection unit 16 or another collection unit.

[0026]

According to the first aspect of the dust remover with a rake according to the present invention, as described above, the sediment deposited on the bottom of the water channel near the screen is sucked from the main opening and the other portion of the pipe is removed. By discharging from the opening, sediment can be removed from the bottom surface such as near the screen, thereby preventing the sediment from coming into contact with the rake and removing the sediment without stopping the operation of the dust remover.

According to the second aspect of the present invention, the sediment sucked at the main opening is discharged from the second opening provided on the upstream side of the rake to be re-entered into the water channel, and the sediment deposited is removed from the main opening through the second opening. By circulating in the water channel through the opening, the removal efficiency of sediment can be increased. Also, when this earth and sand is put into water, it can be captured by a screen and collected by a rake. According to the third aspect of the present invention, the sediment sucked from the main opening and mixed with the pressure fluid is separated into solid and liquid by the filter member, the fluid flows through the third branch conduit, and the sediment is separated into the second branch. It flows through the pipe and is discharged from the second opening. Therefore, the earth and sand from which the fluid has been removed by the solid-liquid separation can be reduced in weight, and the circulating conveyance efficiency up to the second opening is improved.

According to a fourth aspect of the present invention, there is provided a dust remover with a rake according to the present invention, in which the pressurized fluid is discharged from a main opening in conjunction with the raising and lowering of the rake to disturb the sediment deposited on the bottom of a water channel or the like, thereby accumulating sediment. It can be suppressed, so that the soaring soil and the like can be captured by the screen, and this can be scraped off by the rake.

According to the fifth aspect of the present invention, at least one of the first to third operating states is set / selected by operating the switching means in accordance with the sedimentation state of the earth and sand and the type of the earth and sand. Can drive. For example, if all of the first to third operation states can be selected, the switching operation can select the operation of removing the sediment deposited near the screen. Alternatively, even if it is not possible to select all of the first to third operating states, for example, if only the first and second operating states can be selected by the switching means, if only the second and third operating states can be selected, Even when only the first and third operating states can be selected, the switching operation can be selectively performed. Or any one
You may make it possible to select only one operation state.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a basic configuration of a sediment removal device for a rake-equipped dust remover according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a first operation state of the dust remover shown in FIG.

FIG. 3 is a partially enlarged view showing an operation state of a rake and a main opening at a lowered position in the operation state shown in FIG. 2;

FIG. 4 is a schematic diagram showing a second operation state of the dust remover shown in FIG.

FIG. 5 is a schematic diagram showing a third operation state in the dust remover shown in FIG. 1;

FIG. 6 is a schematic configuration diagram of a conventional dust remover (dust remover).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dust removing device 2 Screen 3 Rake 20 Dust remover with rake 21 Sediment removal device 25 Main pipeline 29 First branch pipeline 29A Main opening 29Aa nozzle 30 Second branch pipeline 30A Second opening 31 Third branch pipeline 36 Switching means D Sediment

Claims (5)

[Claims] A rake that rises and falls along a screen disposed in a water channel, a pipeline to which a pressure fluid is supplied, a main opening that communicates with the pipeline, and is linked to elevation of the rake; A negative pressure pump for setting the inside of the pipeline to a negative pressure by the pressure fluid and sucking the earth and the like from the main opening by the negative pressure. A dust remover with a rake, wherein the dust is discharged from the opening of the rake. 2. The rake according to claim 2, wherein the other opening is a second opening provided on an upstream side of the rake, and the rake is capable of collecting sediment and the like discharged into a water channel from the second opening. The dust remover with a rake according to claim 1. 3. A main line for supplying a pressurized fluid to the negative pressure pump, and a main line branched from the main line in a region of the negative pressure pump and communicating with the main opening for applying a suction force. One branch line, and a second branch line and a third branch line in which a main line is branched downstream of the negative pressure pump and a second opening is provided as the other opening, respectively. The third branch pipe is provided with a filter member that allows only fluid to pass therethrough, so that the earth and the like sucked from the main opening are discharged from the second opening of the second branch pipe. The dust remover with a rake unit according to claim 1, wherein: 4. A rake ascending and descending along a screen provided in a water channel, a pipeline to which a pressure fluid is supplied, and a main opening communicating with the pipeline and interlocking with the elevation of the rake. A dust remover with a rake, wherein a pressurized fluid supplied into the conduit is discharged from the main opening to disturb sediment and the like accumulated in the conduit. 5. A rake ascending and descending along a screen provided in a water channel, and a pipeline to which a pressure fluid is supplied, wherein the pipeline is a main pipeline for supplying the pressure fluid to a negative pressure pump, A first branch line that is branched from the main line in the area of the negative pressure pump and communicates with a main opening that is interlocked with the elevation of the rake, and a main line that is branched on the downstream side of the negative pressure pump, A rake-equipped dust remover provided with a second branch line having a second opening and a third branch line, wherein a pressure fluid is discharged from a main opening of the first branch line and a second branch line. And a first operating state of closing the third branch line, and discharging the soil and the like sucked from the main opening of the first branch line from the second opening of the second branch line and performing the third branch. A second operating state in which the pipeline is closed, and a flow through which the pressure fluid permeates the third branch pipeline. It is possible to set at least one of the third operation state in which the filter member is mounted and earth and sand sucked from the main opening of the first branch pipe are discharged from the second opening of the second branch pipe. A rake-equipped dust remover, comprising: