JPS6056856B2 - Equipment for collecting river bed sediment from small rivers such as irrigation canals - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that can efficiently collect suspended matter deposited on the bottom of a small river such as an irrigation canal.

Small rivers such as irrigation canals are heavily polluted by industrial wastewater and domestic sewage.

Among these, floating matter such as garbage and sludge gradually settles and accumulates on the riverbed, raising the riverbed, obstructing the normal flow of the river, and emitting foul odors that harm the living environment. For this reason, conventionally, riverbeds are dredged and settled sediments are collected periodically.
Dredging work in rivers not only requires extremely harsh labor on the workers, but also requires time and cost as the work must be carried out over a wide area of the riverbed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an apparatus that allows floating matter in a river to be deposited in a concentrated manner at a certain location on the riverbed, and to efficiently collect the sediment on the riverbed.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 indicates a river ditch, and a recess 3 is formed in a part of the bottom surface 2 (that is, the riverbed).

In the recessed portion 3, the cross-sectional area of the flow path temporarily expands, so that the flow velocity of the river rapidly decreases and the sedimentation speed of suspended matter in the river is accelerated.

A collection packet 5 whose upper surface is open as a reception opening 4 is housed inside this recess 3 .

The collection packet 5 collects suspended matter (
Filter 7 with a narrow mesh that does not allow dust, sludge, etc.) to pass through.
For example, a vinyl net is stretched, and the outside thereof is protected by a wire rod 8 stretched in the form of a net.

Reference numeral 9 denotes a hoist that lifts the collected packet 5 from the recess 3 and brings it ashore. Linked with packet 5.

A chute 12 that can be freely expanded and contracted is formed on the bottom surface of the collection packet 5. While the chute 12 contracts into a folded state inside the recess 3, when the collection packet 5 is pulled up from the recess 3 by the operation of the hoist 11, it naturally stretches due to the weight of the deposits inside, reducing the volume of the collection packet 5. Expanding. However, the elongation of the chute 12 is kept constant by a wire 21 with a turn dockle. In other words, the sediment is allowed to flow into the elongated chute 12 during pulling up, so that it does not overflow from the receiving port 4 along with the river water.

On the other hand, a lid 14 that automatically opens and closes the discharge port 13 is attached to the lower end of the chute 12. The lid 14 is rotatably supported by a shaft 15 formed integrally with the lid 14 on the peripheral wall of the discharge port 13, as shown in FIGS. 3 and 4.

One end of the shaft 15 protrudes from the outer surface of the peripheral wall of the discharge port 13, and a lever 17 is formed at the protruding end to engage with the hook 16 when the lid 14 is in the closed position.

Then, the shaft 15 is deviated from the center of the lid 14 to either the left or right, and while creating a difference in area on the left and right sides of the top surface of the lid 14 with the shaft 15 as a boundary, a weight is placed on the one with the smaller area of the lid 14. I added 18 to make it heavier than the other one.

Note that the lid 14 has approximately the same diameter as the inner diameter of the circularly formed discharge port 13, and at the same time when the discharge port 13 is fully closed in a horizontal state, the lid 14 is closed so that the side with a larger area does not rotate upward any further. It is adapted to engage with the inner periphery of 13.

Therefore, the load of deposits on the lid 14 in the closed state is different on the left and right sides of the shaft 15, so if the hook 16 and the lever 17 are disengaged and the lid 14 is free to rotate. , because the moment of the lid 14 is unbalanced, it rotates to the right in the figure and opens the discharge port 13.

On the other hand, when all the deposits flow out from the outlet 13 and the load on the lid 14 is removed, the one with the weight 18 lowers under its own weight and closes the outlet 13, and at this time the lever 17 moves to the hook 16. and automatically. This locks the lid 14 in the closed state.

In other words, when the lid 14 is unlocked, it opens naturally due to the weight of the deposits, and when the deposits flow out, it automatically closes due to its own weight.

In addition, 19 in the figure is a stopper 20 that regulates the rotation angle of the lever 17, in other words, the opening degree of the lid 14 within 90 degrees.
is a flexible skirt formed below the discharge port 13 to prevent sediment from spreading when it flows out.

Because of this structure, when the floating matter in the river reaches the recess 3, the flow velocity suddenly drops, so the sedimentation speed increases, and as a result, the sedimentation concentrates from the reception port 4 to the collection packet 5 stored in the recess 3. ,accumulate. The collection packet 5 is brought ashore periodically to collect the deposits. First, the hoist 11 of the hoist 9 is stopped at a predetermined position on the arm 10, and when the hoist 11 is driven, the wire is The recovered packet 5 is then pulled up from the recess 3.

At this time, as described above, the collection packet 5 is used to prevent the chute 12 from extending and deposits from overflowing from the receiving port 4.
Expand the volume of. Then, collect packets 5. above the water surface of the river. After draining the sediment, the hoist 11 is run to position the collection packet 5 above a transport vehicle prepared on the shore, for example, for transporting the sediment to a dumping site.

Therefore, when the discharge port 13 of the chute 12 is aligned with the recovery tank of the transport vehicle and the lever 17 and the hook 16 are disengaged, the deposits inside push open the lid 14 and exit from the discharge port 13.
Flows into the collection tank of the transport vehicle.

When all the deposits are removed, the lid 14 closes and the levers 17 and 7
The claw 16 automatically engages to hold the outlet 13 closed.

In order to store the collection packet 5 in the recess 3, the hoist 11 of the hoist 9 can be operated in the reverse direction.

In this way, floating matter in the river is concentrated in the recess 3 and deposited in the collection packet 5, so that floating matter does not accumulate over a wide range of the river. Furthermore, by periodically bringing the collection packets 5 ashore, the deposits can be easily collected. Moreover, since the sediments that accumulate in the collection packet 5 are inside the recess 3, they do not raise the riverbed and impede the flow of the river. By the way, in this example,
Since a freely expandable chute 12 is formed on the bottom of the collection packet 5, when the collection packet 5 is pulled up, the chute 12 extends and expands the volume of the collection packet 5. This has the advantage that even if it is accumulated, it will not overflow from the receiving port 4 during pulling up.

In addition, while the lid 14 that opens and closes the discharge port 13 of the chute 12 is supported by a shaft 15 offset from its center, a weight 18 is attached to one side of the lid 14, which has a smaller area, with the shaft 15 as a boundary, so that it is heavier than the other side. Since the lid 14 is made heavy, just by unlocking the lid 14, the discharge port 13 opens due to the weight of the deposits, and when the deposits are discharged, the discharge port 13 is automatically closed and the lid 14 is opened.
Since the rotation of the collection packet 5 is suppressed, the task of collecting deposits from the collection packet 5 becomes easier.

Furthermore, the lid 14 has the advantage that it has a simple structure and does not require any power to open and close. Note that the collection packet 5 is limited to the one shown in the above embodiment.
In short, the upper surface is opened as the receiving port 4, and each of the other surfaces (may be a part thereof).

) is sufficient if the filter 7 is attached. Further, if the collection packet 5 is tilted so that the deposits flow out from the receiving port 4, there is no need to form the discharge port 13 at the lower end of the chute 12. Furthermore, by arranging a plurality of these devices at predetermined intervals along a river, the recovery rate of sediment can be improved.

Furthermore, when the width of the river is wide, the present devices can be installed in parallel to collect sludge over the entire width. In this embodiment, the collected packet 5 is hoisted up by a hoist 11, but other hoisting devices may be used, for example, a crane truck or the like may be used to lift the collected packet 5.

As explained above, the present invention forms a recess in a part of the bottom of a river, and the recess rapidly reduces the flow velocity of the river and accelerates the sedimentation rate of floating substances. Because floating materials in the river do not precipitate or accumulate over a wide area on the riverbed, they are concentrated in the collection packet. This has the effect of making it possible to collect sediment in a timely manner, thereby making river maintenance management easier.
In addition, when the collection packet is taken ashore, a portion of the collection packet extends downward, so the stored sludge and other deposits do not overflow, and the lid that opens and closes the discharge port opens automatically when the lock is released. , has excellent operability and is easy to handle.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a plan view of a river, Fig. 2 is a sectional view taken along line A-A, Fig. 3 is a partially cutaway side view of a collection packet, and Fig. 4 is the same. A bottom plan view is shown.

Claims (1)

[Claims] 1. A recess is formed in a part of the riverbed of a small river such as an irrigation canal to rapidly expand the cross-sectional area of the channel, and a collection bucket is stored in this recess with an opening at the top as a receiving port to receive the floating matter that settles. The collection bucket has a telescopic chute formed at its bottom, and a lid that rotates to open and close around a horizontal shaft is provided at the discharge port at the bottom of the chute, and the shaft is mounted eccentrically from the center of the lid. A device for collecting riverbed sediments of small rivers such as irrigation canals, characterized in that a weight is attached to the smaller side of the lid with respect to the axis, and a hook is provided to hold the lid in the closed position.