JPH01322030A - Raft type mud recovering device - Google Patents

Abstract

PURPOSE:To efficiently recover the mud on the water bottom by suppressing the turbidity on the periphery to the min. by suspending a double pipe to the water bottom from a raft type device body and pumping up the mud through an inner pipe and returning water through an outer pipe. CONSTITUTION:In a raft type device body 1 which floats on the water surface H of a lake or dam, an expandable double pipe is suspended to the water bottom from a recovery tank 6. The mud on the water bottom is pumped up through an inner pipe 21, and water is returned to a suction position at the lower edge of the double pipe through an outside pipe 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for collecting mud deposited in lakes and dams.

(Prior Art) When earth and sand flows in from all directions, a lake or a lake gradually becomes buried over a long period of time. Therefore, dams etc.
The current situation is that if left unattended, it will become unusable within a few decades.

Traditionally, so-called dredgers have been used to remove sediment from the seabed. As an example of this dredger, for example, in Japanese Utility Model Application Publication No. 61-80843, a transport pipe is suspended from the barge body, a flexible hose is connected to the lower end of the transport pipe, and a suction body is provided at the tip of the transport pipe. A dredging barge is listed.

In this dredging barge, a tower is built on the main body of the barge, and the transport pipe is suspended by a witch. Sediment on the sea floor is
It is pulled up along with seawater through a transport pipe and discharged to a sand carrier. In addition, as another example, JP-A-60-8873
Publication No. 2 describes a dredger in which a recovery tank is installed on a floating hull supported by floats or the like.

(Problems to be Solved by the Invention) However, when such a dredger is used for a lake, especially a dam, various problems occur.

For one thing, dams are usually built in mountainous areas, so there are transportation and construction issues that make it difficult to transport large-scale equipment such as dredgers and difficult to assemble on-site. There is.

Another problem is that with conventional equipment, no particular attention is paid to the treatment of water pumped up together with earth and sand, so if such equipment is used in dams, etc. The problem is that the water becomes unusable as drinking water.

In addition, there are other problems with dredgers, such as technical and legal restrictions as ships, and high construction costs.

The present invention has been made to solve the above problems, and an object of the present invention is to efficiently recover mud accumulated at the bottom of a dam or the like while minimizing turbidity of surrounding water.

(Means for Solving the Problems) In order to achieve the above object, the mud recovery device of the present invention is of a raft type, in which a recovery tank is supported on the main body of the device floating on the water surface, and a retractable double-walled mud recovery device is installed from the recovery tank. The tube extends downwards, pumping mud through the inner tube and returning water to the suction point through the outer tube.

(Function) The device of the present invention can be assembled around a dam or the like or on the water surface as appropriate.

Due to its elasticity, the tip of the double pipe extending downward from the collection tank can freely follow changes in the irregularities of the water bottom. Further, by pulling up and moving this as appropriate or dragging it, the suction position can be sequentially moved.

Mud on the bottom of the water is pumped up along with water to a recovery tank through the inner pipe of the double pipe. Then, the separated water passes through the gap between the outer tube and the inner tube and is returned to the lower end suction position of the double tube. As a result, the surrounding water rarely becomes cloudy.

(Example) Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 is a partially sectional front view of an apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a top side view of the apparatus. FIGS. 4 and 5 are enlarged views of the main parts of the device viewed from the side and front. - In this embodiment, the device main body 1 is composed of a pair of left and right cylindrical floats 2.3 and a deck 4 fixed to these floats 2.3. A substantially rectangular opening 5 extending in the longitudinal direction is provided in the center of the deck 4, and
A cylindrical recovery tank 6 is fixed to the lower surface of the deck 4 in parallel with both floats 2.3. Also, on deck 4,
A tower 7 is built in the center, and a winch 8 and a generator 9 are installed on either side of the tower 7. Furthermore, a pulley IO is attached to the center of the top of the tower 7.

The recovery tank 6 has an outlet 11 of approximately the same size as the opening 5 of the deck 4, located directly below the opening 5. Further, a cylinder 12 is vertically attached to the center of the collection tank 6 so as to penetrate through the bottom surface. The upper end of the cylindrical body 12 opens into the collection tank 6 at a slightly lower level than the outlet 11.

The upper end of a substantially cylindrical mounting fitting 13 inserted into the inside of the cylinder I2 is fixed to the upper end opening of the cylinder 12. A bellows-type outer hose 1 is attached to the lower end of the mounting bracket 13.
4 is fixed with a tightening band 15. The hose 14 is
It is formed by sandwiching a spiral wire between canvas cloth or vinyl from the inside and outside, and the lower end is fixed to the outer periphery of a cylindrical chute fitting 16 with a tightening band 17.

Inside the pseudo metal fitting 16, a pump 18, commonly referred to as a submersible sand pump, is fixed in a crosswise direction by mounting metal fittings 19 and 20. A joint-connected inner pipe 2I is attached to the upper discharge side of the pump. The inner tube 2I extends upward within the outer port 14 and is connected to the flexible hose 22. The flexible port 22 is connected to a discharge pipe 23 disposed along one side of the outlet 11 of the collection tank 6 . The discharge pipe 23 extends in the left-right longitudinal direction of the outlet 11, and includes a pair of discharge ports 23a and 23b at symmetrical positions. Shoot metal fittings 16
has a pair of rope hooks 24a.

24b is provided, and the lower ends of two ropes 25a, 25b wound around the winch 8 on the deck 4 are connected to these lobe hooks 24. a and 24b, respectively.

Float 2.3. Deck 4F collection tank 6. Outside hose 14
．． The inner pipe 21 and other members can be transported to the site by land transportation, and can be assembled directly on the water surface at the site. The raft-type mud collecting device thus assembled is pulled by a boat or wire and moved to a predetermined location, where ropes 25a, 25
Loosen b and lower the chute fitting 16 to the bottom of the water. When the pump is operated in this state, the mud at the bottom of the water is pumped up along with the water, passes through the inner pipe 21, and is passed through the flexible hose 22. It is collected into the collection tank 6 through the discharge pipe 23. Power for the winch 8 and pump 18 is provided by a generator 9.

As more and more mud 26 accumulates in the recovery tank 6, the water level I7 of the separated water (sewage) rises and exceeds the opening at one end of the cylindrical body 12. It naturally flows out into the outer hose 14. Then, the wastewater that flows out is returned to the inside of the chute fitting 16 through the gap between the outer port 14 and the inner pipe 21, and a part of it is pumped up again together with the mud. Therefore, there is no need to use power to drain the water from the collection tank 6, and there is little risk that the discharged wastewater will scatter and splatter water in the surrounding area.

Furthermore, in addition to the left and right floats 2.3, buoyancy acts on the collection tank 6 itself, so the storage capacity thereof can be increased. In addition, since the floats 2 and 3 are provided on the left and right sides of the collection tank 6, the stability is high, which not only ensures that the collection work is carried out, but also prevents the collected mud from being left alone. , safety can be ensured.

When the work is completed at the specified position, lift the chute fitting I6 slightly, move the main body I, and then move the chute fitting 16 again.
and carry out collection work. Furthermore, movement to an adjacent location can also be performed by simply pulling the chute fitting 16 as it is.

When performing maintenance inspections on pumps, etc., use the joint-connected inner pipe 2.
1 from above and lift the chute fitting 16.

The chute fitting 16 can be moved up and down to dig into mud, thereby enabling more efficient collection work. The chute fitting 16 is also
It functions both as a pump cover and as a weight to stabilize work.

In the first embodiment, a joint-connected inner tube is used, but the inner tube may be of a bellows type similar to the outer hose.

The present invention can be implemented in various other ways.

(Effects of the Invention) Since the raft-type mud recovery device of the present invention is configured as described above, it can be easily transported to a site such as a dam, and can be carried to a site such as a dam while minimizing stagnant water in the surrounding area. It is possible to efficiently collect mud from the bottom of the water.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of an apparatus according to an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a side view of the same part, and Figs. 4 and 5 are main parts of the same embodiment. FIG. 3 is an enlarged partial cross-sectional view of the vehicle as seen from the side and front. l: Equipment main body, 2.3: Float, 6・Recovery tank, 14・
Outer hose (outer pipe), 18 Pump, 2I: Inner pipe, 22
・Frekin pull hose. Agent Patent Attorney Jun Susumu Fuji −

Claims (1)

[Claims] (1) A collection tank supported by the main body of the device floating on the water surface and a telescopic double pipe extending downward from the collection tank are provided, and the mud is pumped into the collection tank via the inner pipe of the double pipe. A raft-type mud collecting device characterized in that the water collected in the collecting tank is returned to a suction position via an outer pipe.