JP4781170B2 - No power dust remover - Google Patents

Description

  The present invention relates to a dust remover for collecting dust contained in water flowing in waterways such as irrigation channels, drainage channels, and rivers, and more particularly, for example, attached to a front stage of a water intake for hydroelectric power generation, The present invention relates to a non-power source dust remover that removes dust from river water without using it.

  In a hydroelectric power generation facility, water drawn from a river or the like is temporarily stored in a water tank, and the water is often led to a generator for power generation. Here, since various dusts are mixed in the water tank, it is necessary to remove the dust mixed in the water before introducing the stored water from the water inlet to the generator. Therefore, in general, dust removal is performed by providing a dust remover in front of the water intake port for introducing water into the generator, thereby preventing dust from flowing into the generator.

  As a conventional technique, for example, in JP-A-9-195249 “Dust remover for waterway” of Patent Document 1, a plurality of screen bars having semicircular shapes with both ends fixed, and rotation between each screen bar, And a plurality of rakes having a mechanism for moving in and out from a semicircular surface formed by a screen bar, and a plurality of scrapers having a mechanism for elastically contacting the rake surface to be moved in and out. There is disclosed a water channel dust remover that removes dust by scraping and scraping off dust blocked by a screen bar with a rake and a scraper.

Japanese Patent Application Laid-Open No. 11-350459 disclosed in Japanese Patent Application Laid-Open No. 11-350459 discloses a plurality of ring screens in which a plurality of scoop portions are arranged on the inner peripheral surface side of a cylindrical main body, and a plurality of ring screens arranged in an annular shape on a support frame. The roller of the ring screen is brought into contact with the edge of the outer peripheral surface of the ring screen so that it can rotate freely, and the rotation center axis of the ring screen is supported by the support frame so that it is substantially perpendicular to the direction of the water channel through which dust or the like flows. There is disclosed a dust removing device in which a ring ring is disposed in a water channel and a drive mechanism for rotating the ring screen is provided on the upper part of the ring screen and on the outer peripheral surface side.
JP-A-9-195249 Japanese Patent Application Laid-Open No. 11-350459

  However, since these dust removers require electric power to rotate the cylindrical screen, it is necessary to draw a dedicated line to secure a power source for operating the apparatus. For this reason, it has been difficult to install these devices in places where it is difficult or impossible to obtain power.

  In addition, these conventional devices have a problem in that their structure is complicated and the manufacturing cost is high, and it is difficult to introduce them in a low-power power plant.

  The present invention was devised to solve such a problem, and the purpose thereof is to remove the dust without requiring electric power by applying a rotational force to the rotating drum using a water flow. The object is to provide an inexpensive non-power-source dust remover with a simple structure.

  In order to solve the above problem, the invention described in claim 1 is directed to a flow path (16) through a substantially cylindrical rotating drum (14) having a screen (12) through which a water flow such as a river is transmitted on a curved surface of a trunk. A non-power-source dust remover (10) that accumulates the dust in the water flow captured by the screen by rotating the rotating drum around the axis by the water flow, and the fluctuation of the water level of the river etc. The non-power-source dust remover is characterized in that the rotating drum is provided with a buoyant body (22) that balances the weight of the rotating drum so that the uppermost portion of the rotating drum is substantially flush with the water surface. I will provide a.

Further, according to a second aspect of the present invention, the dust passes through the space (A) formed between the lower portion of the rotating drum and the bottom of the flow path (16) as the rotating drum (14) rises. An auxiliary screen (24) for preventing this is provided on the bottom surface of the flow path.

  Here, as described in claim 3, the rotating shaft (26) of the rotating drum (14) is rotatably mounted on a guide rail (28) that allows the rotating drum to move up and down within a predetermined range. It is preferable.

Further, as described in claim 4, the flow path (16) is formed such that the bottom of the flow path on the upstream side of the rotary drum (14) is shallow and the bottom of the flow path on the downstream side is deep. It is preferable that the water flow passes through the upper half screen of the rotating drum from the upstream side and flows into the rotating drum, and flows through the downstream screen and flows downstream.

Further, according to the present invention, the rotating drum (14) receives the water flow flowing into the rotating drum from the upstream side, and pulls up the dust in the water flow captured by the rotating drum on the upstream side of the screen (12). It is characterized by having a running water receiver (32) that rotates in a direction.

As described above, in the non-power-source dust remover of the present invention, the rotating drum on which the screen is formed is rotated around the axis by the water flow, so that the dust in the water can be removed without requiring electric power. In addition, since the structure of the non-power-source dust remover of the present invention is simple, its manufacturing cost is low and its running cost is hardly required.
Furthermore, by attaching a buoyant body to the rotating drum and balancing it so that the uppermost part of the rotating drum is almost the same level as the water surface, even if the water level rises due to rain, etc. The force from the water stream can be efficiently transmitted to the rotating drum for rotation.
The dust adhering to the screen on the upstream side of the rotating drum goes around to the downstream side as the rotating drum rotates, and is separated from the screen and collected by the water flowing out from the inside of the screen.

  Here, by providing an auxiliary screen in a space formed in the lower part of the rotating drum and the bottom of the flow path as the rotating drum rises, it is possible to prevent dust from passing through the space.

  Further, by attaching the rotating shaft of the rotating drum to the guide rail that allows the rotating drum to move up and down, the rotating drum can be smoothly moved up and down while being held at a predetermined position. Further, by causing the guide drum to raise and lower the rotating drum within a predetermined range, it is possible to avoid the rotating drum coming into contact with the bottom of the flow path even when the water level is greatly lowered.

In addition, the depth of the flow path is shallow on the upstream side of the rotating drum and deep on the downstream side, and the water flow passes through the upper half screen of the rotating drum and flows into the rotating drum. When the dust is attached to the screen facing the upstream side of the rotating drum, the rotating drum can be rotated in the direction of lifting the dust. Dust adhering to the screen can be removed by water flow.
Here, in order to more surely remove the dust that could not be removed by the water flow, it is also preferable to provide the rotary drum with a scraper for removing the dust, and to remove the dust by scraping with the scraper. . The dust removed from the screen is accumulated in a dust reservoir provided on the downstream side of the rotary drum, and is collected when a predetermined amount or more is accumulated.

  If the rotating drum is provided with a flowing water receiver that receives the water flow flowing into the rotating drum from the upstream side and rotates the rotating drum in a certain direction, it is possible to rotate the rotating drum more reliably and collect the dust. Become.

  The non-power-source dust remover according to the present invention immerses a substantially cylindrical rotating drum in which a screen that transmits a water flow is formed on the curved surface of the body in the water flow in the flow path, and rotates the rotating drum by the water flow by the screen. The captured dust is collected and removed. Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a state where the non-power-source dust remover of the present invention is installed in a water channel, and FIG. 2 is a side view transparent view thereof.
As shown in the figure, the non-power-source dust remover 10 of this embodiment includes a substantially cylindrical rotating drum 14. The body of the rotating drum 14 includes an annular outer frame 31 arranged in parallel, and a screen 12 provided on the outer peripheral surface of the outer frame 31 and configured by a metal mesh or the like. The rotating drum 14 has a rotating shaft 26 at its center, and the rotating shaft 26 is rotatably supported by a guide rail 28 that is attached to the side wall of the flow path 16 so as to extend in the vertical direction. The guide rail 28 allows the rotary drum 14 to move up and down only within a predetermined range. Further, when the rotating drum is elongated horizontally, it is of course possible to provide an outer frame for reinforcement in the middle of the screen 12.

The rotating drum 14 is provided with a frame 29 that supports the screen 12 by connecting the outer frames between adjacent outer frames 31, and a buoyant body 22 is attached to the frame. For this buoyancy body 22, foamed urethane, synthetic resin tank, or the like is used. When a tank is used, it is also preferable that the buoyancy can be adjusted by putting a liquid such as water into the tank. As shown in the figure, in this embodiment, the frame 29 itself is configured to be the buoyancy body 22.
The rotary drum 14 is adjusted by the buoyancy generated by the buoyancy body 22 so that the uppermost portion thereof is almost the same height as the water surface regardless of the fluctuation of the water level. However, since the guide rail 28 allows the rotating drum 14 (the rotating shaft 26) to move up and down only within a predetermined range (for example, about 30 cm), the rotating drum 14 can be connected to the flow path 16 even when the water level is extremely reduced. There is no contact with the bottom, and no large space is formed between the rotating drum 14 and the bottom of the flow path 16 even when the water level increases extremely.

  The dust adhering to the screen 12 facing the upstream side of the rotary drum 14 is pulled up by the rotation of the rotary drum 14 by the water flow, and the water flow that flows out of the rotary drum in the water channel on the downstream side of the rotary drum (upper water channel 43a described later). Is released from the screen and released into the water. Here, the scraper 33 is provided on the rotating drum 14 in order to surely peel off the dust that has not been peeled off from the screen 12 by the water flow.

The scraper 33 has a brush 33b attached to a metal arm 33a that is rotatably supported on the left and right of a rotating shaft 26 protruding to the side of the rotary drum 14 and extends close to the screen 12. . The arm is suspended from, for example, a support column 35 provided on the guide rail 28 so as to be in a fixed position in the upper water channel described later (see FIG. 2).
When the rotating drum 14 is rotated by the force of the water flow and the dust trapped on the screen 12 is pulled up, and the dust that has been pulled up wraps around the downstream side, most of the dust is peeled off from the screen 12 by the water flow flowing out of the rotating drum 14. . However, the dust that has not been peeled off by the water flow is scraped off from the screen 12 by the brush 33b of the scraper 33 and released into the water of the downstream water channel (upper water channel).

  As shown in FIG. 2, when the rotating drum 14 rises within the allowable range of the guide rail 28 due to the rise of the water level, a space formed between the lower portion of the rotating drum 14 and the bottom of the flow path 16 ( In order to prevent the dust from passing through A), an auxiliary screen 24 is provided between the rotary drum 14 and the flow path 16. For example, as shown in the drawing, the auxiliary screen 24 is a comb-shaped screen that is attached to the flow path 16 immediately before the rotary drum 14 and extends while being inclined toward the rotary drum 14 from the bottom of the flow path. The dust captured by the auxiliary screen 24 climbs the auxiliary screen along the inclination by the water flow, and after falling down from the front end of the auxiliary screen, is captured by the screen 12 of the rotating drum 14.

Here, in order to increase the rotational force of the rotating drum 14 due to the water flow, a plurality of flowing water receivers 32 are attached at equal intervals between the adjacent outer frames 31 of the rotating drum 14. The running water receiver 32 of the present embodiment is formed by using the frame 29 and the buoyancy body 22 that connect between the adjacent outer frames 31. That is, the water flow receiver 32 has a concave surface that receives the flow of water flowing into the rotary screen 12 from the upstream side in the shape of the frame 29 and the buoyancy body 22, and the back side of this concave surface is from the screen to the downstream side. It is configured by forming a shape that receives the flowing water flow. Of course, it is possible to adopt a configuration in which the individual water catcher is attached to the frame 29 or the like without using the water catcher 32 as described above.
The water flow that has flowed into the rotary drum 14 from the upstream side is received by a plurality of water receivers 32 and gives a rotational force to the rotary drum 14, and then the water flow decreases the flow velocity and passes through the back side of the water receiver to rotate the rotary drum. It flows out from the inside to the downstream side.

  Next, the installation situation and operation of the non-power-source dust remover 10 of the present invention will be described with reference to FIGS.

  The hydroelectric power station is provided with a power generator 37 that generates power by a water flow, and power is generated by guiding water in a water tank 39 that stores water introduced from a river or the like from a water intake 41 to the power generator. . In FIG. 2, the generator 37 is shown in a simplified manner. The non-power-source dust remover 10 of the present invention is installed in front of the water intake 41 in the water tank 39 and removes dust from the water flowing into the water intake from the water tank.

The bottom of the flow path 16 in which the rotary drum 14 is immersed is formed so that the upstream side of the rotary drum 14 is shallow and the downstream side is deep. Under normal conditions, the water depth of the upstream flow path 16 is shallow so as to be about the radius of the rotating drum immediately before the rotating drum 14, and the depth is rapidly increased below the rotating drum installation position. The diameter of the rotating drum. Accordingly, the water flow passes through the upper half screen 12a of the rotary drum 14 from the upstream side and flows into the rotary drum, and flows through the entire screen 12b on the downstream side and flows downstream.
In addition, without changing the depth of the flow path 16 itself, it is also possible to allow a water flow to flow from the upper half screen 12a of the rotary drum 14 by installing a sloped surface member at the bottom of the flow path (not shown). )
When the dust in the water stream passes through the upper half screen 12a of the rotary drum 14 from the upstream side and flows into the rotary drum 14, it is filtered by the screen (FIG. 3A).
The water flow rapidly increases its flow rate just before the rotating drum 14 and decreases its flow rate behind the rotating drum 14. Therefore, the rotating drum 14 rotates in the direction of pulling up the dust trapped by the upstream screen 12 mainly due to the resistance of the water flow received by the flowing water receiver 32 (FIG. 3B).
The rotating drum 14 rotates by receiving the water flow, and collects dust in the water flow captured by the screen 12 (12a) in an upper water channel described below to perform dust removal (FIG. 3C).

  The flow path 16 on the downstream side of the immersed rotating drum 14 is layered into an upper water channel 43 a for collecting dust collected by the rotating drum and a lower water channel 43 b for guiding the water after dust removal to the generator 37. Have been separated. The upper water channel 43a and the lower water channel 43b are configured to allow passage of water while preventing passage of dust from the upper water channel to the lower water channel, and the dust collected in the upper water channel It is pushed and accumulated by the water flow up to the dust reservoir located on the downstream side (FIG. 3D).

  According to the non-power-source dust remover of the present invention described above, the dust attached to the screen can be removed without requiring electric power by applying a rotational force to the rotating drum using a water flow. Dust removers can be installed in places where removal is difficult or difficult. In addition, since the non-power-source dust remover of the present invention has a simple structure and its manufacturing cost is low, it can be easily introduced into a low-output power plant.

  The present invention is not limited to the above-described embodiments, and the configuration shown in the figure is applicable as long as dust removal is performed by rotating a rotating drum provided with a screen without water using a water flow. Of course, the present invention is not limited, and various changes can be made without departing from the scope of the present invention.

  The non-power-source dust remover of the present invention can be used not only when removing dust accumulated in a water tank in a hydroelectric power generation facility, but also in a pond, a reservoir, a river, or the like where falling leaves are likely to accumulate, where water flow is formed. Can be used at any location.

It is the perspective view which showed the state which installed the non-power-source dust remover of this invention in the water channel. It is a side transmissive view for explaining the installation situation of the non-power-source dust remover shown in FIG. It is the figure which showed a mode that the non-power-source dust remover of this invention removed dust.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Non-power-source dust remover 12 Screen 12a Upper half screen 12b Downstream screen 14 Rotating drum 16 Flow path 22 Buoyant body 24 Auxiliary screen 26 Rotating shaft 28 Guide rail 29 Frame 32 Running water receiver 31 Outer frame 33 Scraper 33a Arm 33b Brush 35 Prop 37 Generator 39 Water tank 41 Water intake 43a Upper water channel 43b Lower water channel

Claims (5)

A substantially cylindrical rotating drum (14) having a screen (12) that transmits a water flow such as a river is formed on the curved surface of the fuselage is immersed in the water flow in the flow path (16), and the rotating drum is rotated around the axis by the water flow. It is a non-power source dust remover (10) that accumulates the dust in the water flow captured by the screen by rotating the
The rotating drum is provided with a buoyant body (22) that balances the weight of the rotating drum so that the uppermost portion of the rotating drum is almost flush with the water surface following the fluctuation of the water level in a river or the like. No power dust remover.   Auxiliary screen (24) for preventing dust from passing through the space (A) formed between the lower part of the rotating drum and the bottom of the flow path (16) as the rotating drum (14) rises. The non-power-source dust remover according to claim 1, wherein is provided on a bottom surface of the flow path.   The rotary shaft (26) of the rotary drum (14) is rotatably mounted on a guide rail (28) that allows the rotary drum to move up and down within a predetermined range. No power dust remover as described in 1.   In the flow path (16), the bottom of the flow path on the upstream side of the rotating drum (14) is shallow and the bottom of the flow path on the downstream side is formed deep, and the water flow is from the upstream side to the upper half of the rotary drum. The non-power-source dust remover according to any one of claims 1 to 3, wherein the non-power-source dust remover flows into the rotating drum through the screen and flows out through the downstream screen. The rotating drum (14) receives a water flow that flows into the rotating drum from the upstream side, and a rotating water receiver (32) that rotates the rotating drum in a direction to pull up the dust in the water flow captured on the upstream side of the screen (12). The non-power-source dust remover according to any one of claims 1 to 4, further comprising: