JPH0566443B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a waterway debris collection device that is installed in an irrigation waterway such as an agricultural waterway or a power generation waterway and removes dirt from water.

(Prior art) As a conventional device for removing dust contained in irrigation canals, screens are placed at important points in irrigation canals.
Clean the screen by installing a device to scrape up dust in front of the screen and operating it occasionally to scrape up and remove the dust, or by rotating the installed screen and scraping the dust off the surface with a scraper. and taking out trash at the same time. At the same time as this garbage is removed from the screen, it is pulled up onto land and transported as appropriate by a conveyor or the like.

(Problems to be Solved by the Invention) In conventional waterway dust removal devices, the dust adhering to the screen is removed using power, and the dust adhering to the screen is removed underwater in the waterway. However, no consideration has been given to removing them in such cases. The present invention attempts to collect and remove dust removed from the screen and released into the water.

(Means for Solving the Problems) The present invention, as a means for solving the above problems, branches a flow path to form a main flow path and a branch flow path,
A screen is disposed at the entrance of the main flow path at the branching part, the main flow path and the branch flow path are merged at the downstream part, and a gutter-shaped dust collection box is installed in the branch flow path, and the dust collection box is At the downstream end, a dust collection screen is installed that traverses the entire width of the branch channel.

(Function) The water flowing through the flow path passes through a screen on the main flow path side, so that the water flows while being prevented from getting mixed with dust. Dust also enters the diversion channel side along with the water flow, but the gutter-shaped dust collection box placed in the diversion channel is equipped with a screen that crosses the entire width of the diversion width on the outflow side, so the dust does not enter. Collected and accumulated in the dust collection box. This dust collection box is taken out once every few days, and another dust collection box is placed to discharge the garbage.

(Example) Examples of the present invention will be described below with reference to the drawings. As shown in Figures 1 and 2, the main flow channel 2 is connected to the inflow channel 1.
and the branch channel 3, and a screen 4 is attached to the inlet 2a of the main channel 2. The main channel 2 and the branch channel 3 are arranged in parallel and merge at a merging portion 5 at the end of the branch channel 3. A gutter-shaped dust collection box is installed in the branch channel 3 in a removable manner, and the dust collection box 6 is large enough to fit into the entire width of the branch channel 3 without any gaps, and is located at the downstream end of the branch channel 3. A main screen 7 for dust collection is installed across the entire width of the branch channel 3 and reaches above the water surface from the bottom, covering the entire cross section of the trough-like dust collection box 6. Further, at the upstream end of the dust collection box 6, a dust collection sub-screen 8 which crosses the entire width of the branch flow path 3 and has a low height is attached. Note that there is a branch channel 3 on the front of the dust collection box 6.
A dust collection plate 9 is provided extending left and right to catch dust at the side ends of the cover. In this embodiment, two dust collecting boxes 6 are provided along the flow, and the other dust collecting box 6a has the same structure. A crane 19 is provided above the dust collection boxes 6, 6a for lifting the dust collection boxes upward and transporting them to the position of the truck.

In addition, on the front of the screen 4 of the main channel 2,
A dust sweeper 10 is installed, and the blades 10 are
By a, the dust adhering to the screen 4 is removed and discharged toward the branch flow path 3.
Further, in the main flow path 2, an upper weir 11 is provided, which divides the main flow path 2 into an upstream portion 2a and a downstream portion 2b, and has a weir top elevation determined to create a water level difference between the two.
Then, in order to make the planned water level of the inflow channel 1 equal to the weir crest in the front part of the main channel 2 of the inflow channel 1 and the branch part of the branch channel 3 and the downstream part 2b of the main channel 2, upstream spillage is applied. A discharge 12 and a downstream spillway 13 are provided, and both are connected to a spillway 14. At the junction 5 of the main channel 2 and the branch channel 3, the water level is lowered by the dam gate 15 due to the downstream spillway 13. It opens above the water surface of the downstream part 2b of the main flow path. Further, the dam gate 15 is provided with an auxiliary screen 16 for preventing dust that cannot be removed by the dust collection boxes 6, 6a in the branch flow path 3 from entering the downstream portion 2b of the main flow path. The downstream portion 2b of the main flow path is generally connected to an outlet flow path, but in this embodiment, the outlet flow path is a culvert portion 17, and a branch waterway 18 branching from this portion is also connected. That is, the dust discharge device is often installed at a location where the open waterway flows into a culvert or a pipe waterway, and this embodiment is one example thereof.

Water that has flowed through the inflow channel 1 flows into the main channel 2 after passing through the screen 4. At this time, since the water passes through the screen 4, the dust adheres to the screen 4, and clean water flows into the main flow path 2. and,
A dust sweeper 10 is placed in the waterway in front of the screen 4. In the dust sweeper 10, in this embodiment, the blades 10a spread as they move in the downstream direction due to the flowing water force, scrape off the dust adhering to the surface of the screen 4, and discharge it into the water in the direction of the branch channel 3. structure (see patent application No. 1983-76980). A part of the water flow from the inflow channel 1 flows into the branch channel 3 together with the dust that has flowed down on the screen 4 and the dust that has been scraped off from the screen 4 by the dust sweeper 10. The dust is blocked from flowing down by the dust collection main screen 7 of the dust collection box 6, and is accumulated in the dust collection box 6.

In such a flow, an abnormal rise in the water level of the inlet waterway 1 and the downstream part 2b of the main waterway means that the water level from the upstream spillway 12 and downstream spillway 13 to the spillway 1
The presence of the weir upper weir 11 prevents the water level of the inflow channel 1 and the upstream portion 2a of the main flow path from falling. Furthermore, even if there is an upper or lower water surface in the downstream part 2b of the main channel, the dam gate 15 in the confluence channel 5
is opened above the water surface of the downstream portion 2b of the main flow path. Therefore, in the branch channel 3, the water level difference from the inlet to the outlet is always constant, and the flow force in the branch channel 3 is always maintained appropriately.

As the accumulation of dust progresses in the dust collecting box 6, the main screen 7 becomes clogged, thereby blocking the flow of water in the branch channel 3 and reducing the amount of water passing through. As a result, the water level downstream of the dust collection box 6 decreases, but since the inlet of the branch channel 3 is connected to the inflow waterway 1 and is always constant, this causes a water level difference upstream and downstream of the dust collection box 6, and this Dust collection box 6 depending on the water level difference
The dust inside is compacted considerably. In this way, the amount of water passing through the diversion channel 3 may change depending on the accumulation state of garbage, but originally the amount of water passing through the diversion channel 3 is only a part of the water amount in the inflow channel 1, and the screen 4 and The volume of customers in the main channel 2 is determined so that the entire amount of water from the inflow channel 1 can pass through, so there is no problem at all.

When the dust in the dust collection box 6 becomes full, first the dam gate 15 is closed to block the confluence part 5. Next, another empty dust collection box 6a is installed in front of or after the dust collection box 6 in the branch channel 3. And dust box 6
When the difference in water level between the top and bottom of the water has become as small as possible,
The crane 19 pulls the dust collection box 6 full of trash out of the water and deposits the box together on a truck (not shown) or the like. Dust collection box 6 with crane 19
When the dust collection box 6 is pulled up, the water in the dust collection box 6 flows out from both end faces of the gutter-shaped box, but the main screen 7 is located on the downstream side.
Since there is a sub-screen 8 installed on the upstream side, only water flows out and no garbage overflows.

In addition, when the dust collection box 6 is full and the dust collection box 6a is installed upstream of it, there may be dust where the dust collection box 6a is installed, so the dust is transferred to the dust collection box 6a. Being trampled on. However, this trampled dirt is captured by a dust collection box installed next at the dust collection box 6. However, dust collection box 6
When a is pulled up, it moves to the middle part between the upstream dust collection box 6a and the downstream dust collection box 6 and deposits therein, and then when the downstream dust collection box 6 is pulled up, it floats up afterwards. It is also expected that These dusts are captured by the auxiliary screen 16 of the merging section 5, but since the dust caught by the auxiliary screen 16 is not discharged in the regular dust discharge operation, in order to reduce the amount of this dust, a Dust collection boxes 6 installed at the front and rear of the
6a should be kept as close as possible.

Note that even if the dust sweeper 10 does not operate due to dust being trapped and the screen 4 becomes clogged, the upstream spillway 9 operates and releases water, so overflow is avoided and the flow rate of the main flow path 2 is reduced. It only needs to decrease. Further, when the amount of water used downstream flowing out from the main channel 2 is reduced compared to the flow rate from the inflow channel 1, the downstream spillway 13 is activated to maintain a normal state. However, the upstream spillway 12 is originally a piece of equipment that must be installed to prevent water from overflowing where water flows into a culvert or pipe channel from an open channel, and the downstream spillway 1
Even if 3 is not provided, the dust collection function will be temporarily lost, so it is not absolutely necessary. Therefore, the equipment can be as simple as a diversion section, a screen, a dust collection box, and a confluence section, and it can be as simple as adding a weir above the weir to smooth the flow in the diversion channel, but it has sufficient functionality. I can say that.

(Effects of the Invention) Since the present invention has the above-described configuration and operation, almost all of the dust in flowing water can be collected by simply providing extremely simple equipment. What's more, it can be an unmanned and non-powered facility, and can provide an excellent garbage discharge device that can completely discharge the garbage with only a small amount of work to take out the dust collection box once every few days. It could be a game-changer.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the waterway of the present invention, and FIG.
FIG. 1... Inflow channel, 2... Main channel, 3... Branch channel, 4... Screen, 5... Merging section, 6... Dust collection box, 7... Main screen for dust collection.

Claims (1)

[Claims] 1 Branching the flow path to form a main flow path and a branch flow path,
A screen is disposed at the entrance of the main flow path at the branching part, the main flow path and the branch flow path are merged at the downstream part, and a gutter-shaped dust collection box is installed in the branch flow path, and the dust collection box is A waterway dust collection device, characterized in that a dust collection screen that crosses the entire width of the branch channel is installed at the downstream end.