JP2016102387A - Dust screen device for small size hydraulic generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system capable of automatically handling dust caught by a dust screen for small size hydraulic power generator.SOLUTION: A dust screen (7) for small size hydraulic power generator is disposed at the upstream side of a small size hydraulic power generation turbine. Dust which is caught by the dust screen (7) is released to the downstream of power generation turbine (4) to prevent undesired influence on the small size hydraulic power generator on the small size hydraulic power generator.SELECTED DRAWING: Figure 1

Description

The present invention relates to a dust screen device for a small hydroelectric generator.

In the past, small hydroelectric power generation apparatuses have been provided with a fixed trash screen, a kakiage type dust removal apparatus, and the like upstream of the small hydroelectric power generation turbine.
A mechanism for lifting a small hydroelectric generator and a dust removing device from a water channel in response to requirements for irrigation channel management such as water increase and weather conditions as in Patent Document 1 has been proposed.
As in Patent Document 2, there has been proposed a method of pulling up trash stuck on the screen to the land side.
As disclosed in Patent Document 3, there has been proposed a method for raising garbage to the land side while constantly rotating using fluid power.

JP2011-117355A JP2012-237112A JP2013-189837A

nothing special

The problem to be solved by the present invention is that when a small hydroelectric generator is disposed in a water channel, foreign matters such as dust are entangled with components in the small hydroelectric generator such as the hydroelectric turbine (4) and guide vanes (16). In order to adversely affect performance degradation, etc., a conventional garbage screen was installed upstream of the small hydroelectric generator. Expenses for disposal were incurred.

A dust screen (7) for temporarily capturing garbage is installed upstream of the water channel where the small hydroelectric generator is installed, and the situation where the garbage causes a performance degradation on the small hydroelectric generator is detected. At the same time or after the power generation turbine (4) retreats on the water, the captured garbage is discharged downstream.

A trash screen (7) for temporarily capturing trash on the upstream side of the water channel where the small hydroelectric generator is installed, and a sluice gate (15) that functions to prevent water from flowing into the hydroelectric generator turbine side water channel (18). ) To detect the situation where the trash stagnates on the trash screen (7) and adversely affects the small hydroelectric generator, and the sluice door (15) is operated to connect the hydropower turbine side waterway (18) and Discharges the captured garbage downstream through different waterways.

In the dust screen (7), by tilting the screen surface downstream in the direction of increasing the water depth, an effect of pushing the dust staying on the screen (7) below the dust screen (7) can be obtained.

The detection of the situation where the trash stagnating on the trash screen (7) has an adverse effect on the small hydroelectric generator is based on the increase in fluid resistance acting on the trash screen (7), the flow rate of the water channel, the water level near the trash screen (7) Obtained by changes in power generation of small hydroelectric generators.

According to the present invention, after the situation where the stagnation on the dust screen (7) has an adverse effect on the small hydroelectric generator is quickly detected and the small hydroelectric generator is not adversely affected, the garbage is removed from the small hydroelectric generator. By performing the process of discharging to the downstream, automatic operation can be continued while suppressing adverse effects on the small hydroelectric generator. As a result, effects such as suppression of power generation reduction due to garbage and reduction of the number of dispatch of maintenance personnel can be obtained.

It is not necessary to collect and discard the trash captured by the trash screen (7).

It is an incision side view which showed the Example (before retraction | saving) of Claim 1 in the garbage screen apparatus for small hydroelectric generators of this invention. It is an incision side view which showed the Example (after retraction | saving) of Claim 1 in the garbage screen apparatus for small hydroelectric generators of this invention. It is the top view which showed the Example of Claim 1 in the refuse screen apparatus for small hydroelectric generators of this invention. It is the cut | disconnection side view which showed the Example (before a sluice door operation | movement) of Claim 2 in the refuse screen apparatus for small hydroelectric generators of this invention. It is the cut | disconnection side view which showed the Example (after a sluice gate action | operation) of Claim 2 in the garbage screen apparatus for small hydroelectric generators of this invention. It is the incision top view which showed the Example of Claim 2 in the garbage screen apparatus for small hydroelectric generators of this invention.

A trash screen is arranged upstream of the hydroelectric turbine installed in the irrigation channel, and the trash is allowed to flow on the downstream side in a state where the garbage does not adversely affect the hydroelectric turbine, so that the staff can remove the garbage on-site. Realize continuous operation with automatic processing without any need to do so.

FIG. 1 shows the configuration of an embodiment of the present invention before the hydroelectric turbine (4) of the first aspect of the present invention in the dust screen device for a small hydroelectric generator is retracted onto the water.
A movable dust screen (7) having a dust screen rotating shaft (8) is arranged on the upstream side of the hydroelectric turbine (4). The hydroelectric turbine (4) is assembled to and integrated with the gear box (5), the generator (6), and the gantry (14), and is rotated about the gantry rotating shaft (13) by the drive machine (10). It has become.
The gantry rotating shaft (13) and the trash screen rotating shaft (8) are connected by a link bar (9). When the drive machine (10) rotates the gantry (14), the hydroelectric turbine (4) is lifted onto the water. At the same time, the link bar (9) is pressed and the lower end of the dust screen (7) rotates downstream as shown in FIG. 2, and the captured dust is discharged downstream.

The mechanism for discharging the trash trapped on the trash screen (7) to the downstream can be a lift type as well as a rotary type as described above.

The drive for the dust screen (7) can be controlled independently.

FIG. 4 shows a configuration of an embodiment showing before the sluice door (15) of claim 2 in the garbage screen device for a small hydroelectric generator of the present invention is operated.
The hydroelectric turbine (4) rotates inside the duct (19). The rotational force is transmitted from the main shaft (17) to the gear housing (5) and is transmitted to the generator (6).
A dust screen (7) is installed on the upstream side of the hydroelectric turbine (4), and a sluice door (15) is provided below it.
The sluice gate (15) is connected to the drive unit (10) by the link bar (9), and when the drive unit (10) opens the sluice door (15) downward, the water flowing from the upstream is captured by the dust screen (7). Together with the collected waste, it is discharged downstream without passing through the hydroelectric turbine side water channel (18).

To the garbage screen (7), vibrations, rotations, air jets, and water jets can be added to make it easy to leave the captured garbage.

Not only small hydroelectric generators installed in irrigation canals, but also stagnation on upstream trash screens in measurement, water diversion, water transfer, sluice, and other systems without adversely affecting system performance. The process can be completed by flowing.

DESCRIPTION OF SYMBOLS 1 Water channel upper end part 2 Water channel bottom part 3 Water guide channel 4 Hydroelectric power generation turbine 5 Gear housing 6 Generator 7 Garbage screen 8 Garbage screen rotating shaft 9 Link bar 10 Driver 11 Upstream side water flow 12 Downstream side water flow 13 Base rotating shaft 14 Base 15 Water Gate 16 Guide vane 17 Main shaft 18 Hydroelectric turbine side water channel 19 Duct 20 Casing

Claims (3)

A movable dust screen (7) is disposed upstream of the hydroelectric turbine (4) disposed in the irrigation channel, and at the same time or after the hydropower turbine (4) is lifted and retreated from the water, the dust screen ( 7) A garbage disposal system for a small hydroelectric generator characterized by moving stagnant garbage downstream by moving it. A dust screen (7) is disposed upstream of the hydroelectric turbine (4) disposed in the irrigation channel so that water does not flow into the hydroelectric turbine side water channel (18) adjacent to the dust screen (7). A functioning sluice gate (15) is arranged, and at the same time or after the sluice gate (15) functions, the stagnation of the stagnation on the trash screen (7) is routed through the hydroelectric turbine side water channel (18). A waste treatment system for a small hydroelectric generator, which is discharged downstream. In the garbage screen (7) arranged in the irrigation channel, the garbage screen device is arranged so that the screen surface is inclined downstream in the direction of increasing the water depth.

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