JP2021042647A - Hydraulically driven dust collector for small hydroelectric power generation - Google Patents

Abstract

To provide a dust collector of a water intake port which can non-electrically and automatically clean foreign matters remaining on a screen surface, using a dust collecting screen installed for stable water intake on a small hydroelectric power generation facility using river and a water passage for agriculture with low water passage heights, and water flowing in the water passage.SOLUTION: A dust collector of a water intake port includes: a dust collecting screen 22 for filtering foreign matters such as branches, leaves and glasses flowing in water f for power generation flowing in a water passage A so as to stably feed water to a water feed pipe 27 for feeding water to a power generation water turbine from the water intake water passage A of small hydroelectric power generation; and a dust collecting brush 26 for allowing a dust collecting water turbine 24 for driving remaining foreign matters on a screen surface that is not filtered by the screen 22 with energy of purified water flow that is filtered by the screen 22 and falls to cross and pass a projection through a surface slit of the screen 22, and bouncing the foreign matters accumulated on the surface of the screen 22 to a lower water passage B.SELECTED DRAWING: Figure 1

Description

The present invention relates to an automatic dust remover provided at an intake of a small hydropower generator, and includes a screen for preventing filtration of dust such as leaves, grass, and branches flowing along with water flowing through a water channel, and the surface of the screen. The present invention relates to a dust removing device for an intake port that automatically removes dust adhering to and remaining in the water channel by using the water flow of the water channel, repels it together with overflow water of the water channel, and flows it to the lower water channel of the water channel.

For example, a water channel as a water intake facility of a small hydroelectric power generation device is provided with a dust removing device for removing dust such as leaves, grass, and branches flowing through the water channel. Dust on the screen provided at the intake of the small hydroelectric power generation facility causes the intake to close and gets entangled with the water turbine for power generation, which is a factor that causes a decrease in the amount of power generation and a failure.

In the dust removal device at the intake of a small-scale power plant that uses conventional water, a water intake screen is installed, and the dust removal device that flushes away dust that is not filtered by the water intake screen by using the source water flow that flows away without being filtered (Patent Document 1). ). According to this, it is possible to take in water while removing suspended matter from rivers and agricultural canals to the downstream side.

The amount of water taken from a small-scale power plant that uses conventional water varies depending on the season, and the dust remover (Patent Document 1) that can wash away using the source water flow that is not purified by the water intake screen has a dust removal function when the amount of water decreases. However, if it becomes possible to constantly remove dust regardless of the amount of water, it will be possible to stabilize the amount of water intake by increasing the dust removal effect from rivers and agricultural canals whose flow rate fluctuates depending on the season.

JP-A-2017-141621

The problem to be solved regarding the dust remover at the intake of a small hydroelectric power generation facility is that the conventional water intake system does not have a slope screen that can wash away foreign matter on the unfiltered screen surface with raw water. Although the dust removal effect can be surely obtained, there is a problem that the dust removal ability that can be washed away decreases when the amount of water is small.

The technique of Patent Document 1 is characterized in that the position form of the dust remover is generally set so that the screen surface is a slope that descends toward the downstream direction of the canal in agricultural canals and rivers where the canal height and head are small. However, since the screen requires an effective inclination angle to obtain the dust removal effect, the water pipe at the bottom of the intake tank is located, and water intake is a requirement at the time of intake level of the power generation equipment for small-scale hydroelectric power generation. There is an obstacle in selecting a location.
In addition, there is a problem that the amount of power generation drops due to a decrease in the effective head of a small-scale power plant.

Therefore, the present invention automatically drives the dust remover on the surface of the water intake screen of a small-scale power plant by using the energy of the water flowing through the water channel, which contributes to energy saving and raises the water pipe from the water intake tank to the water turbine for power generation. Position it and increase the effective head.

According to one form of the water intake device according to the present invention, the screen 22 for filtering foreign substances such as branches, leaves, and grass flowing along with the water flowing through the water channel is provided, and the residual foreign matter on the screen surface that is not filtered by the screen is removed. It is provided with a device for splashing with a dust removing turbine brush 26 driven by the energy of a purified water stream that is filtered and dropped by a screen.

Since the dust removal turbine brush 26 can drive and remove dust, the effective angle at which dust falls on the screen 22 becomes low, and a water intake facility for hydroelectric power generation is installed even in a low-height waterway without the need for separate embedding work. be able to.

Further, according to one form of the dust removing device of the water intake unit according to the present invention, the water intake guide plate 21 is installed on the dust removing screen 22 so as to maintain the drive facing angle with respect to the water turbine blade 25 inside the screen 22. The dust removing brush 26 can be rotationally driven only by the water flow.

According to the present invention, even if dust adheres to the screen surface of the intake port for small hydroelectric power generation, which takes in water from the water channel where the height of the retaining wall of the water channel is low and the overflow flow rate is small, the generator can be attached to the water turbine. Effective water supply can be maintained, and power generation loss can be suppressed to a low level by preventing the generator from shutting down.

Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing one embodiment of a water intake facility for small hydroelectric power generation according to the present invention.

It is a perspective view which shows one Embodiment of the hydraulic drive type dust removal device by this invention. It is a side view which shows one Embodiment of the hydraulic drive type dust removal device by this invention. It is a top view which shows the hydraulic drive type dust removal device by this invention. It is an elevation view which shows the hydraulic drive type dust removal device by this invention. It is a perspective view which shows the embodiment of claim 2 in the hydraulic drive type dust removal device by this invention. FIG. 5 is a perspective view showing a situation in which dust is discharged from the embodiment according to claim 2 in the hydraulically driven dust remover according to the present invention. It is a detailed view and the enlarged view of the dust removal screen 22 in the hydraulic drive type dust removal device by this invention. It is a detailed view of the dust removal turbine part 24, 25, 26 in the hydraulic drive type dust removal device by this invention. It is a detailed view of the water intake guide plate 21 in the hydraulic drive type dust removal device by this invention.

Hereinafter, a sequence of forms of the dust remover at the water intake according to the present invention will be described with reference to FIG. The dust removing device of this water intake is provided with a dust removing screen 22 that filters foreign substances such as branches, leaves, and grass that flow along with the water f flowing through the water channel, and removes foreign substances that are not filtered by the screen 22 and remain on the surface of the screen 22. The dust removal turbine unit 24 driven by the purified water stream filtered from the screen 22 is installed inside the water tank 23 and used as a driving force source for the dust removal device.

Then, in the dust removing device of the present invention, the dust removing water wheel core 24 is installed so as to project into the slits of the water wheel blade 25 for rotationally driving and the dust removing screen 22, and the dust removing brush 26 crosses the slits and repels foreign matter accumulated on the surface. To be equipped.

According to this, water can be smoothly stored in the water intake tank 23 from the slit of the dust removal screen 22, and stable water can be supplied from the water pipe 27 to the water turbine for hydraulic power generation.

Further, the form of the water intake guide plate 21 is not limited to this embodiment, and may be provided so as to change the facing angle with respect to the water turbine blade 25.

Further, a sand discharge valve 28 for discharging sediments such as stored water sand and soil filtered through the slit of the dust removal screen 22 is provided.

Further, depending on the width of the water channel, several devices of the present invention may be provided so as to be installed in parallel in the water channel.

The hydraulically driven dust remover for small hydroelectric power generation of the present invention cannot take the effective angle required for dust falling on the surface of the dust removal screen, which makes it difficult to select dust removal equipment for agricultural waterways, water and sewage facilities, company factories, etc. It is an automatic dust remover for small hydroelectric power generation that can be installed in any of the lead-in canals.
In addition, it has a simple structure and can be installed simply by installing it in an existing waterway with a low waterway height, and it has great potential for use as a dust remover for small hydroelectric power plants.

20 Intake plate wall 21 Intake guide plate 22 Dust removal screen 23 Intake tank 24 Water wheel core 25 Water wheel blade 26 Dust removal brush 27 Water pipe 28 Sand discharge valve A Power generation intake channel B A Waterway lower waterway D Intake channel retaining wall f Power generation water

Claims (3)

A water turbine that is installed in the recessed water channel of a small hydroelectric power generation facility, has a water flow guide plate that sends water to the intake water tank, a dust removal screen that is arranged on the slope above the intake tank, and a water turbine that is rotationally driven by purified water filtered by the dust removal screen. A dust removal device for a water intake port, characterized in that a water wheel portion composed of a core, a water wheel blade, and a water wheel blade is provided with a dust removal brush that repels foreign matter on the surface of the dust removal screen. The dust removing device for a water intake according to claim 1, wherein the dust removing brush is projected and rotated with respect to a slit of the screen in a direction intersecting the water flow by a water wheel portion that is rotationally driven by the water flow. The dust removal device for an intake port according to claim 1, wherein the dust removal turbine is provided in a space inside the dust removal screen and a water intake tank.

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