JP6144818B1 - Water wheel with reverse cleaning type dust removal screen - Google Patents

Abstract

The present invention proposes a new dust removing means that combines a reverse cleaning type screen that does not use a rake, and a lifting / lowering movement or pendulum movement of a water wheel. According to the present invention, a screen is arranged at a position lower than the top end of the dam-up impermeable wall on the upstream side of the water turbine, and a flow-down impermeable wall is installed at the upstream end of the screen, thereby The water flowing from the flow-down impervious wall is prevented from flowing down, and when it passes under the flow-down impervious wall and passes through the screen, dust is captured by the screen. Overflowing up the water barrier of the upside and flowing into the water turbine, the water turbine rotates to generate electricity, and the screen and the water turbine are lifted or swung up to form a water flow that descends. It is characterized by backwashing the dust that had been stored. [Selection] Figure 1

Description

The present invention relates to a water wheel provided with a reverse cleaning type screen that does not use a rake and a reverse cleaning type dust removing screen that combines a pendulum movement or a lifting movement of the water wheel.

Therefore, the present inventor previously disclosed in Japanese Patent No. 4902809 (see Patent Document 1) that the water channel is attached to a support shaft provided at the upper part of the water channel so as to be swingable and a shielding plate is attached to the lower part. And a dust removing screen comprising a screen body for creating a water flow from the upper part of the shielding plate toward the downstream side, a descending rake installed so as to move up and down the front surface of the screen, and the support shaft on the back side of the screen body. An open-type gravity-type water turbine equipped with a dust-removing screen, characterized in that it has a power generation water turbine attached to the head in a swingable manner.

Thus, in a conventional water turbine equipped with a dust removal screen, dust is captured by a screen with a shielding plate arranged so as to block the water flow upstream of the water turbine, and the captured dust is scraped off by a rake, and in a timely manner. The water turbine and the screen were swung up to cause the water on the upstream side to flow from the bottom of the water wheel, and at the same time, the dust also flowed downstream.
However, in the method of scraping the screen dust with the rake, for example, in winter, there is a phenomenon that the screen close to the surface of the water freezes and closes and the rake can not be scraped down as expected. .

Japanese Patent No. 4902809

The water wheel provided with the reverse cleaning type dust removing screen of the present invention is intended to solve the above-mentioned problems in the conventional example, and the reverse cleaning type screen that does not use the rake causing the problem, We propose a new dust removal method that combines the pendulum motion.

Therefore, in order to solve such a problem, the present invention arranges a screen at a position lower than the top end of the dam-up impermeable wall on the upstream side of the water turbine, which is the inlet of the water, and the upstream end of the screen is located above the screen. A water-impervious wall for falling water (hereinafter referred to as a water-impervious wall for flow down) will be installed so that water will not pass through. By doing so, the water flowing from the upstream is prevented from flowing down by the flow-down impermeable wall and sinks under the flow-down impermeable wall and passes through the screen. Is captured. After that, the water overflows Tensui of the impermeable wall for dam up and flows into the turbine, and the turbine is rotated to generate electricity.

That is, in the water turbine equipped with the reverse cleaning type dust removing screen of the present invention, the screen is disposed at a position lower than the top end of the dam-up impermeable wall on the upstream side of the water turbine, which is the inlet of water, and the upstream end of the screen. By installing a flow-down impervious wall so that water does not pass above the screen, water flowing from the upstream is prevented from flowing down by the flow-down impervious wall, and the flow-down impervious wall. When passing under the water wall and passing through the screen, dust is captured by the screen, and then the water overflows the dam-up water barrier wall and flows into the water wheel, which rotates the water wheel. Power generation is being carried out,
When the screen and the water wheel are raised, water flows down from the gap formed between the bottom of the water channel and the dam-up impermeable wall, and the overflow is interrupted and a water flow descending from the screen is formed. The dust captured by the screen is backwashed and removed from the screen.

Further, the water turbine equipped with the reverse cleaning type dust removing screen of the present invention is arranged at a position lower than the top end of the dam-up impermeable wall on the upstream side of the water turbine, which is the inlet of water, and at the upstream end of the screen. By installing a flow-down impervious wall so that water does not pass above the screen, water flowing from the upstream is prevented from flowing down by the flow-down impervious wall, and the flow-down impervious wall. When passing under the water wall and passing through the screen, dust is captured by the screen, and then the water overflows the dam-up water barrier wall and flows into the water wheel, which rotates the water wheel. Power generation is being carried out,
By swinging up the screen and the water wheel, water flows down from the gap formed between the bottom of the water channel and the impermeable wall for dam up, and the overflow is interrupted and a water flow descending from the screen is formed. The dust captured by the screen is backwashed and removed from the screen.

According to the water wheel provided with the reverse cleaning type dust removing screen of the present invention, when dust accumulates on the screen as described above, when the water wheel is swung up or lifted, the dam-up impermeable wall and the water channel bottom are separated. Since the water passes through the water, the overflow of the water is interrupted at the top of the impermeable wall for dam-up, and the water falls from the top to the bottom.
At this time, the dust trapped on the screen by the falling water separates from the screen, moves toward the bottom of the water channel, and further flows on the running water to the downstream of the water turbine.
After that, when the water turbine is returned to its original position, the waterway is blocked by the dam-up impermeable wall and the upstream side is dammed up, and the water flows under the flow-down impermeable wall by the flow-down impermeable wall. Underwater, water passes through the screen to remove dust, overflows the dam-up impermeable wall, rotates the water wheel, and generates electricity.

According to the water wheel provided with the reverse cleaning type dust removing screen of the present invention, the following effects can be obtained.
As described above, with the method of scraping the dust on the screen with the rake, for example, in winter, the screen close to the surface of the water freezes and becomes blocked, and the phenomenon that the rake can not be scraped off as expected. Although this occurs, the water wheel equipped with the reverse cleaning type dust removing screen of the present invention does not use a rake, and the screen that is always present in the water does not freeze, so that such a phenomenon can be avoided.
In addition, the combination of a reverse-cleaning screen that does not expose the screen to the water surface and the pendulum movement or lifting movement of the water wheel eliminates the need for rake and the power machine that operates it. It is easy to dispose, and a significant cost reduction can be achieved as a mechanism including a dust removing screen.

It is the schematic which shows an electric power generation condition in 1st Example of the water turbine provided with the screen for reverse cleaning type | mold dust removal of this invention. It is the schematic of the state which raised the screen and the water wheel, backwashed the dust collected on the screen, and discharged it to the downstream of a river. It is the schematic which shows the electric power generation condition in 2nd Example of the water turbine provided with the screen for reverse cleaning type | mold dust removal of this invention. It is the schematic of the state which raised the screen and the water wheel, and backwashed the dust collected on the screen, and discharged to the downstream of a river.

Embodiments of a water turbine provided with a reverse cleaning type dust removing screen according to the present invention will be described below in detail with reference to the drawings.
In FIG. 1 showing a first embodiment of a water turbine equipped with a reverse cleaning type dust removing screen of the present invention, the top of a dam-up impermeable wall 14 upstream of a water turbine 21 which is a water stagnation opening in a water channel 11. A dust removing screen 12 is horizontally arranged at a position lower than the end. A flow-down impermeable wall 13 is installed at the upstream end of the screen 12 so that water does not pass through the upper part of the screen 12. Reference numeral 22 denotes a support arm of the water turbine 21.
Accordingly, the water flowing from the upstream is prevented from flowing down by the flow-down impermeable wall 13, and enters the screen 12 from the bottom to the top when entering the screen 12 from below to above the flow-down impermeable wall 13. At 12, the dust 30 is captured.
Thereafter, the water overflows the ceiling of the dam-up impermeable wall 14 and flows into the water turbine 21, whereby the water turbine 21 rotates to generate power.

Next, at the time of backwashing, as shown in FIG. 2, the screen 12 and the water wheel 21 are pulled up by appropriate means, so that the dam-up impermeable wall 14 and the bottom of the water channel are separated from each other. Since the water passes, the water forms a descending water flow, and the dust 30 captured by the screen 12 is back-washed.
Therefore, by performing this reverse cleaning operation by detecting the degree of clogging of the screen 12 or by repeatedly performing it in a certain time, it is possible to continue power generation while eliminating the dust 30 on the screen 12. It is.

In FIG. 3 which shows the 2nd Example of the water turbine provided with the screen for reverse-cleaning type dust removal of this invention, the ceiling of the dam-up impermeable wall 34 upstream of the water wheel 41 which is the inlet of the water in the water channel 31. A dust removing screen 32 is horizontally arranged at a position lower than the end. A flow-down impermeable wall 33 is installed at the upstream end of the screen 32 so that water does not pass above the screen 32. Reference numeral 42 denotes a support arm of the water turbine 41.
Accordingly, the water flowing from the upstream is prevented from flowing down by the flow-down impermeable wall 33, and enters the screen 32 from the lower side to the upper side by going under the flow-down impermeable wall 33 and passing through the screen 32 from above. At 32, the dust 50 is captured.
Thereafter, the water overflows Tensui of the dam-up impermeable wall 34 and flows into the water turbine 41, whereby the water turbine 41 rotates to generate power.

Next, at the time of back washing, as shown in FIG. 4, the screen 32 and the water wheel 41 are swung up by a suitable means toward the downstream side so that the dam-up impermeable wall 34 and the bottom of the water channel are separated from each other. Since the water passes therethrough, the water forms a descending water flow, and the dust 50 captured by the screen 32 is back-washed.
Therefore, by performing this reverse cleaning operation by detecting the degree of clogging of the screen 32 or by repeatedly performing it in a fixed time, power generation can be continued while removing the dust 50 on the screen 32. It is.

The water turbine provided with the reverse cleaning type dust removing screen according to the present invention is operated as follows.
<During normal power generation> (See Figs. 1 and 3)
At the time of dust removal which is the main purpose of the dust removal screen, the screens 12 and 32 are set in the water channels 11 and 31.
In this state, the cross section of the water flow is shielded by the dam-up impermeable walls 14, 34, the upstream of the dam rises, and the water flows in the water channels 11, 31 from the upper part to the lower part of the dam-up impermeable walls 14, 34. Since the flowing water flow F is generated, the water flow generates the rotational force of the power generation water turbines 21 and 41, and the power generation water turbines 21 and 41 are operated to generate power.

<During reverse cleaning> (See FIGS. 2 and 4)
When removing the dust 30 and 50 accumulated on the screens 12 and 32 during power generation, as shown in FIGS. 2 to 4, the screens 12 and 32 and the water turbines 21 and 41 are appropriately lifted or directed downstream. By swinging up, the dam-up impermeable walls 14 and 34 and the bottom of the water channel are separated from each other, so that water passes through the dam-up impermeable walls 14 and 34. The dust 30 and 50 that have been stored are back-washed.
After the screens 12 and 32 and the power generation turbines 21 and 41 are lifted or swung up in this way, the dusts 30 and 50 are back-washed from the screens 12 and 32, and the dusts 30 and 50 are discharged from the screens 12 and 32. When the power generation turbines 21 and 41 are returned to their original positions together with the screens 12 and 32, the water flow capacity of the screens 12 and 32 is restored, so that power generation can be resumed.

By programming the above-described back cleaning process in the control system, it is possible to continue power generation while automatically restoring the dust removal function of the screen.

The water wheel provided with the reverse cleaning type dust removing screen of the present invention can be used not only in a small river but also in various water channels provided in the water channel and others.
If the same principle as described above is established, the present invention can be applied to other types of water turbines.

DESCRIPTION OF SYMBOLS 11 Water channel 12 Dust removal screen 13 Flow-down impermeable wall 14 Dam-up impermeable wall 21 Water wheel 22 Support arm 30 Dust 31 Water channel 32 Dust-eliminating screen 33 Flow-down impermeable wall 34 Dam-up impermeable water Wall 41 Water wheel 42 Support arm 50 Dust F Water flow

Claims (2)

A screen is placed at a position lower than the top of the impermeable barrier wall for dam-up upstream of the water turbine, which is a water stagnation port, and for the flow-down so that water does not pass above the screen at the upstream end of the screen. By installing the impermeable wall, the water flowing from the upstream is prevented from flowing into the flow-down impermeable wall, and when the water sinks under the flow-down impermeable wall and passes through the screen, Dust is captured in the water, and then the water overflows Tensui of the impermeable wall for dam up and flows into the water turbine, which causes the water turbine to rotate and generate electricity,
When the screen and the water turbine are raised, water flows down from the gap formed between the bottom of the water channel and the dam-up impermeable wall, the overflow is interrupted and a falling water flow is formed and captured by the screen. A water wheel equipped with a reverse cleaning type dust removing screen, wherein the dust is back cleaned and removed from the screen. A screen is placed at a position lower than the top of the impermeable barrier wall for dam-up upstream of the water turbine, which is a water stagnation port, and for the flow-down so that water does not pass above the screen at the upstream end of the screen. By installing the impermeable wall, the water flowing from the upstream is prevented from flowing into the flow-down impermeable wall, and when the water sinks under the flow-down impermeable wall and passes through the screen, Dust is captured in the water, and then the water overflows Tensui of the impermeable wall for dam up and flows into the water turbine, which causes the water turbine to rotate and generate electricity,
By swinging up the screen and the water wheel, water flows down from the gap formed between the bottom of the water channel and the impermeable wall for dam up, the overflow is interrupted and a falling water flow is formed and the screen captures. A water wheel equipped with a reverse cleaning type dust removal screen, wherein the dust that has been removed is back cleaned and removed from the screen.

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