JP3903288B2 - Dust removal method and screen for dust removal in running water - Google Patents

Description

The present invention relates to a dust removal screen, and in particular, it is possible to separate and eliminate foreign substances from the screen without lifting up above the water surface, and to efficiently restore the function as a dust removal screen. is there.

All the conventional dust removing devices scrape the foreign matter captured by the screen and collect it in another place and treat it as so-called industrial waste.
Nothing in particular.

However, in the case of a conventional rake-flick screen, the following points are problems.
a. The foreign matter becomes industrial waste when it is swept above the water surface and cannot be returned to the water again.
b. Therefore, in addition to the scraping device for the foreign matter, a moving and accumulating device for the scraped foreign matter is required, and the collected foreign matter needs to be treated as industrial waste.

Therefore, the dust removal method for running water according to the present invention uses a dust removal screen having a movable screen that can be moved up and down and a rake that is usually located above the movable screen, and the rake is lowered along the movable screen to make the dust. While pushing the object to the lower part of the screen and raising the lower end of the movable screen to above the rake position, the impurities separated from the movable screen are discharged from the lower part of the movable screen. .

The method for removing dust in running water according to the present invention uses a dust removing screen having a movable screen that can be moved up and down and a rake that is usually located above the movable screen. It is also characterized by recovering the upper water flow capacity while pushing the lower part of the movable screen to the lower part of the movable screen and continuing the dust removal as it is.

The dust removal method for running water according to the present invention is such that the rake is lowered along the movable screen, and the lower end of the movable screen is raised above the rake position in a state where impurities are pushed to the lower part of the movable screen. It is also characterized in that impurities separated from the water can be swept away on the water flow.

The dust removal method for running water according to the present invention is also characterized in that the movable screen has an arc shape and the rake also rotates along the surface of the arc-shaped movable screen.

The dust removal method for running water according to the present invention is characterized in that an arc-shaped movable screen is pivotally supported with its upper end pivoted, and its lower end can be swung up and down in the downstream direction of the water flow. Is.

The dust removing screen according to the present invention is a dust removing screen having a movable screen that can be moved up and down and a rake that is normally positioned above the movable screen. The rake is formed so as to be rotatable along the surface of the arc-shaped movable screen, and the lower end of the rake can be moved up and down by rotating the movable screen as the rake is lowered. is there.

According to the dust removing screen of the present invention, the following effects can be obtained.
A. Since the contaminants are accumulated in water and separated from the screen, the contaminants do not become industrial waste and can be allowed to flow as they are.
B. Since no industrial waste is generated, the mobile stacking apparatus and processing are not required.

In addition, the above series of processes,
1) Lower the rake along the movable screen and restore the upper water flow capacity with the impurities pushed to the lower part of the movable screen.
2) The rake is lowered along the movable screen, and further, the lower end of the movable screen is raised above the rake position, and the foreign matter separated from the movable screen is pushed on the water flow.
By programming the above process in the control system, the dust removal function of the screen can be automatically maintained, industrial waste is not generated because the waste is treated in water, and the dust removal system can be simplified. it can.
During the operation of raising the screen and separating / removing impurities from the screen, the impurities cannot be used for power generation or the like because the impurities are mixed in the running water.

Embodiments of the dust removal screen of the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a schematic front view showing an embodiment of a dust removing screen according to the present invention, FIG. 2 is a schematic side view of a movable screen portion, FIG. 3 is an explanatory diagram showing processing steps for foreign matters, and FIG. It is the schematic explaining the waterway which installed the screen for water.

In FIGS. 1 and 2, reference numeral 11 denotes a concrete water channel, and guide grooves 13 for attaching the movable screen 12 to the water channel are obliquely formed on both side walls thereof so that the lower side faces the upstream direction. A screen fixing shaft 14 is fitted in the guide groove 13 and is held in the guide groove 13 so as to be movable up and down.
The raising and lowering of the screen fixing shaft 14 can be appropriately selected from means such as a wire winding type, a gear type using a gear, and a float type.

A descending rake 15 is attached to the upper portion of the movable screen 12, and the claw portion 16 is held downward while being fitted in the gap of the movable screen 12. The descent rake 15 can be driven by its own weight when it is lowered, and can be raised by a hoisting wire when it is lifted or moved up and down by a hydraulic cylinder or other driving device.

Next, a method for operating the dust removing screen of the present invention will be described with reference to FIG.
(A) Step 1
At the time of dust removal, which is the main purpose of the dust removal screen, the movable screen (1a) 12 is lowered to the bottom, and the descending rake (1b) 15 is raised above the water surface.
(B) Step 2
When removing the contaminants 21 from the movable screen (1a) 12, the descending rake (1b) 15 is lowered into the water along the movable screen (1a) 12, and the contaminants (I) captured by the movable screen (1a) 12 are removed. ) Push down 21 around the bottom. In this manner, when the descent rake (1b) 15 is lowered along the movable screen (1a) 12 and the foreign matter (ii) 21 is pushed to the lower part of the movable screen (1a) 12, the upper water flow capacity is Since it recovers, it can pass through as it is.
(C) Step 3
If the movable screen (1a) 12 is raised while the descending rake (1b) 15 is lowered to a predetermined position, only the foreign matter (a) 21 is left under the descending rake (1b) 15. The foreign matter (a) 21 left behind and separated from the movable screen (1a) 12 is released into the space between the movable screen (1a) 12 and the bottom surface (W≡) of the water channel (W) 11, and the movable screen (1a) ) Since the restriction by 12 is eliminated, it is removed by riding on the flow of water.
(D) Step 4
Thereafter, when both the movable screen (1a) 12 and the descending rake (1b) 15 are raised above the water surface, the foreign matter (I) 21 floating near the water surface also flows down.
Further, the movable screen (1a) 12 and the descending rake (1b) 15 are set at the initial position, and dust removal is started again (step 1). By repeating the above process, the dust removal function of the screen is maintained.

By programming the above-described series of processes (a) to (d) in the control system, the dust removal function in the movable screen can be automatically maintained, and industrial waste is generated in order to treat foreign substances in water. It does not occur and the dust removal system can be simplified.
During the operation of raising the movable screen and separating / removing impurities from the movable screen, the impurities cannot be used for power generation or the like because the impurities are mixed into the running water.

FIG. 4 shows a schematic view of a water channel in which the dust removing screen of the present invention is installed.
A movable screen 12 and a descending rake 15 constituting the dust removing screen of the present invention are installed in the water channel 11 led from the river 31 and the like.
First, in a state where the dust removal screen is operated (solid line), the gate 32 installed behind the movable screen 12 is pulled up or laid down and opened. On the other hand, the gate 35 installed in the sub-water channel 34 is pulled down or stood and closed.
That is, in the state of the process 1), the lowering rake 15 is lowered along the movable screen 12 and the contaminant 21 is pushed to the lower part of the movable screen 12 to restore the upper water passing ability and pass the water as it is. To do. The water after dust removal is appropriately used in the simple power generation facility 33 and the like.

Next, in a state where the contaminants 21 are removed from the dust removal screen (dashed lines), the gate 32 installed behind the movable screen 12 is lowered or stood and closed.
That is, in the state of the process 2), the lowering rake 15 is lowered along the movable screen 12, and the lower end of the movable screen 12 is further raised above the position of the lowering rake 15 so as to be separated from the movable screen 12. 21 is pushed on the stream of water. In this state, the water containing the contaminants 21 is discharged to the river 31 or the like through the sub-water channel 34 that is released by the gate 35 being pulled up or lying down.

FIG. 5 is a schematic front view showing another embodiment of the dust removing screen of the present invention, and FIG. 6 is a schematic view for explaining the situation where the dust removing screen is installed.

5 and 6, reference numeral 41 denotes a concrete water channel, and a rotating shaft 43 for attaching the movable screen 42 to the water channel is attached to both side walls thereof. In this example, the movable screen 42 has an arc shape and rotates around the rotation shaft 43. Therefore, the movable screen 42 does not need to be pulled upward, and can be installed in an upper open channel, for example, a closed channel.
In the figure, 44 is a fixed shaft for connecting a large number of movable screens 42, and is attached to a rotary shaft 43 via a connecting arm 45.
The driving of the movable screen 42 can be appropriately selected from winding means using a wire, a hydraulic cylinder and other driving devices.

On the upper part of the movable screen 42, a descending rake 46 is coaxially mounted on the movable screen 42 so as to be mounted on the rotary shaft 43. The claw portion 47 is fitted downward in the gap of the movable screen 42. Is held in. The descent rake 46 is driven by its own weight when descending around the rotating shaft 43, and is rotated by a hoisting wire when it is lifted, or rotated by a hydraulic cylinder or other driving device. be able to.
Of course, the processes (a) to (d) in the above-described embodiment are also adopted in this embodiment, and a series of processes are programmed in the control system so that the dust removal function in the movable screen can be automatically maintained. Even in such a case, industrial waste is not generated because the impurities are treated in water, and the dust removal system can be simplified.

FIG. 7 is a schematic side view showing still another embodiment of the dust removal screen of the present invention, FIG. 8 is a schematic side view of the dust removal screen set with the descent rake, and FIG. 9 is along the arc-shaped movable screen. FIG. 10 is a schematic side view of a state in which the lowering rake is lowered, FIG. 10 is a schematic side view of the state in which the movable screen is rotated and the lower end thereof is moved up and down with the rotation of the lowering rake, and FIG. It is a schematic side view of the state rotated beyond the lower end of a screen.

In FIG. 7, 51 is a concrete water channel, and a rotating shaft 53 for attaching the movable screen 52 to the water channel is attached to both side walls thereof. In this example, the movable screen 52 has an arc shape and rotates around the rotary shaft 53, so that it is not necessary to pull it up.

On the downstream side of the movable screen 52, a drive shaft 55 is disposed at a predetermined interval from the rotary shaft 53, and a descending rake 54 is attached to the drive shaft 55. The descending rake 54 is held downward with its claw portion 56 fitted into the gap on the upstream side of the movable screen 52. The descent rake 54 can be driven by a hydraulic cylinder or other driving device.

In the figure, reference numeral 57 denotes a scraping plate (preferably made of rubber) attached to the side opposite to the claw portion 56 of the descending rake 54, and scrapes off the foreign matter accumulated in the lower portion of the movable screen 52. This is to make the screen 52 properly contact the water channel 51. The scraping plate 57 sweeps the water channel 51 each time it contacts the water channel 51.

In the operation of the dust removing screen of this embodiment, the descending rake 54 is first set from the standby position indicated by the broken line in FIG. 8 to the initial position indicated by the solid line.
Next, as shown in FIG. 9, when the drive shaft 55 is driven and the descending rake 54 is lowered along the arc-shaped movable screen 52, the claw portion 56 is fitted into the gap on the upstream side of the movable screen 52 and is a contaminant. Scrap off. At the same time, the movable screen 52 is also rotated by the length of the descending rake 54 so that the lower end rises from the bottom surface of the water channel 51. At that time, since the scraping plate 57 sweeps the lower end portion of the movable screen 52, there is no possibility that impurities are accumulated in the portion. Reference numeral 58 denotes a weight for returning the movable screen 52 to the initial position.
If the lowering rake 54 is further rotated as shown in FIG. 10, the lower end of the movable screen 52 continues to rise further.
Then, when the position reaches the position of FIG. 11, the lowering rake 54 and the movable screen 52 are disengaged, the movable screen 52 returns to the initial position by the weight of the weight 58, and the lowering rake 54 makes one rotation as it is. To return to the initial position.

The dust removal screen of the present invention can be used not only in front of a water gate of a concrete waterway or a water intake for a small power generation facility, but also as a dust removal screen used in various waterways.

It is a schematic front view which shows one Example of the screen for dust removal of this invention. It is a schematic side view of a movable screen part. It is explanatory drawing which shows the processing process of a foreign material. It is the schematic explaining the water channel which installed the screen for dust removal of this invention. It is a schematic front view which shows the other Example of the screen for dust removal of this invention. It is the schematic explaining the condition which installed the said screen for dust removal. It is a schematic side view which shows another Example of the screen for dust removal of this invention. It is a schematic side view of the state where the descent rake is set on the dust removing screen. It is a schematic side view of the state where the descent rake was lowered along the arcuate movable screen. It is a schematic side view of the state which rotated the movable screen with the rotation of the descent rake, and raised and lowered its lower end. It is a schematic side view of the state which rotated the descent-type rake beyond the lower end of the movable screen.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Waterway 12 Movable screen 13 Guide groove 14 Screen fixed shaft 15 Descent-type rake 16 Claw part 21 Contaminant 31 River 32 Gate 33 Simplified power generation equipment 34 Secondary water channel 35 Gate 41 Water channel 42 Movable screen 43 Rotating shaft 44 Fixed shaft 45 Connecting arm 46 Descent rake 47 Claw 51 Concrete channel 52 Movable screen 53 Rotating shaft 54 Descent rake 55 Drive shaft 56 Claw 57 Scraping plate 58 Weight

Claims (6)

Using a dust removal screen that has a movable screen that can be moved up and down and a rake that is usually located at the top of the movable screen, the rake is lowered along the movable screen to push impurities to the bottom of the screen, and the rake position A method for removing dust from running water, wherein the lower end of the movable screen is raised to a higher position so that impurities separated from the movable screen are discharged from the lower portion of the movable screen. Using a dust removal screen that has a movable screen that can be moved up and down and a rake that is usually located at the top of the movable screen. The method for removing dust in running water is characterized by recovering the upper water flow capacity and continuing the dust removal as it is. Lowering the rake along the movable screen and pushing the contaminants to the bottom of the movable screen, the lower end of the movable screen is raised above the rake position, so that the contaminants separated from the movable screen can flow into the water. The method for removing dust in flowing water according to claim 1, wherein the dust can be swept while being carried. 4. The method for removing dust in running water according to claim 1, wherein a dust removing screen is used in which the movable screen is arcuate and the rake is rotated along the surface of the arcuate movable screen. 5. A dust removal screen for flowing water according to claim 4, wherein a dust removing screen is used in which an arc-shaped movable screen is pivotally supported with its upper end pivoted and its lower end swings in the downstream direction of the water flow. Method. In a dust removal screen that has a movable screen that can be moved up and down and a rake that is usually located at the top of the movable screen, the movable screen is formed in an arc shape that pivots on the upper end and is swingable. A dust removing screen which is formed so as to be rotatable along a surface of an arc-shaped movable screen so that the lower end of the movable screen can be moved up and down as the rake is lowered.

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