JPH07111064B2 - Dredged material transport device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dredged material conveying device for conveying sediment such as sediment and sludge collected in the water of rivers, lakes and marshes.

[0002]

2. Description of the Related Art Conventionally, dredging of sediment such as sediments and sludge in rivers, lakes and marshes, ports, etc. is generally grabbed on the bottom of the ship by a barge or a grab provided on the land side and lifted to the top or land side of the ship. The method of eliminating dredging is adopted.

However, since the method described above is extremely inefficient, it is conceivable to scrape the bottom deposit with a scraper device having a bucket or the like attached to the rotating body and convey the deposit to the berth or the land side. .

[0004]

However, since a large amount of water intervenes in the sediment scraped in water, there is a problem that the transport efficiency is extremely low.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a dredged material transporting apparatus capable of efficiently transporting even a sediment containing a large amount of water that is scraped up in water.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is directed to a discharge portion on the other end side of a casing in which a dredged material inlet is formed on one end side and a screw blade with a shaft is accommodated. , The screw vane is removed and the outlet is narrowed to provide a retaining / dehydrating portion of the dredged material having a drainage portion, and the pneumatic fluid passage formed in the shaft faces the outlet of the retaining / dehydrating portion at the end of the shaft. And the dredged material dehydrated in the retention dehydration section by the gas ejected from the pneumatic fluid passage is configured to be pneumatically conveyed through a transport pipe connected to the outlet of the retention dehydration section. is there.

[0007]

According to the above construction, the dredged material that is scraped up and put into the input port together with water is stagnate in the retention dewatering section and pressure dehydration is carried out to a soft state containing a certain amount of water and gradually sent to the outlet, Since the carrier gas continuously ejected from the pneumatic fluid passage opened at the end of the shaft toward the outlet is carried out through the transport pipe, it can be installed in the middle of the transport route with an extremely simple structure. Yes, for example, when it is installed in a dredging device that moves the bottom of the water and dredges sediments, it can greatly reduce the water content of the dredger that is transported to the barge or land side, and efficiently and continuously transports it. It is also possible to simplify the processing after transportation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a dredging barge apparatus having a dredged material carrying device according to the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 2, reference numeral 1 denotes a dredging barge which is self-propelled or towed by the barge 1, a solid water separator 3 and a sediment storage tank 4 provided on the barge 1, and And a lifting device 5 for the dredging device 2.

The dredging device 2 which is moved up and down between the pontoon 1 and the water bottom by the elevating device 5 having the winch 5a is rotationally driven in the direction of arrow A around the horizontal axis center orthogonal to the traveling direction at the front. A scraper 8 having a drum 6 and a bucket 7 that is attached to the outer peripheral portion of the drum 6 at regular intervals to collect soil and sand is disposed, and the rear portion of the scraper 8 is provided with a first screw feeder 9 for dredged material. Dredged material conveying device 10 for conveying the water to the solid water separation device 3 of the pier 1.
Is provided.

As shown in FIG. 1, this dredged material conveying device 1
No. 0 is attached to one end of a cylindrical casing 13 that rotatably houses the screw blade 12 with the shaft 11 in the same axial center.
An input port 14 to which the discharge port 9a of the screw feeder 9 is connected is formed, and a flexible transport pipe 16 is connected to the outlet 15 on the other end side.

In the vicinity of the upstream side of the outlet 15, there is formed a retention / dehydration section 17 in which the screw blade 12 is deleted by a predetermined length at the downstream end and the casing 13 of the outlet section is reduced in diameter 17a toward the downstream side. The dewatering unit 17 is composed of a double pipe 17b which is slidable and whose capacity can be adjusted, so that the dredged material sent by the screw blades 12 is reduced in diameter by a diameter reducing unit 17
The water that has been retained and compressed by a and is dehydrated can be discharged from the gap of the double pipe 17b that is the drainage portion.

The shaft 11 is hollow and has an air supply air passage 11a formed therein, one end of which is connected to an air supply air hose 18 that opens on the pontoon 1, and the other end of which is a reduced diameter portion of the retention dehydration unit 17. 17a is opened. An air pump 20 is installed in the exhaust pipe 19 of the solid-water separation device 3 on the pontoon 1 connected via the transport pipe 16, and the dredged material that has been dewatered by being compressed in the stay dewatering unit 17 is gradually being provided. Shaft 11 when extruded into
It is configured to be sent to the solid-water separation device 3 on the pontoon 1 via the transport pipe 16 by the air-delivered air ejected from the air-delivered air passage 11a.

In the pontoon 1, the water contained in the dredged material carried in by the solid-water separator 3 is discharged, and the dredged material settled in the lower part is pushed out to the discharge port 22 by the bottom screw 21 and further the second screw. It is configured to be sent to the earth and sand storage tank 4 by the feeder 23.

In the above structure, the dredging device 2 is moved along the water bottom to scrape the dredged material by the scraper 8, the dredged material is sent to the dredged material transporting device 10 through the first screw feeder 9, and the staying and dewatering of the casing 13 is performed. Part 1
In addition to draining the water that has been retained in 7 and compressed and dehydrated, the water is somewhat hydrated and a soft dredged material is gradually pushed out to the outlet 15, and this dredged material is transported by air delivery air ejected from the air delivery air passage 11a. It is sent from the pipe 16 to the solid-water separation device 3 on the ship 1. Then, the dredged material is further dehydrated by the solid-water separator 3 and sent to the earth and sand storage tank 4.

According to the above construction, since the dredged material transporting device 10 is provided in the dredging device 2 that moves on the water bottom, it is possible to dehydrate the water contained in the dredged material to be transported to the pier 1, and then transport it. The amount of the dredged material to be transported can be significantly reduced, the transportation device can be downsized, and the dredging device 2 can be easily handled. Further, the solid-water separation device 3 on the ship 1 can also be simplified and downsized.

The dredged material transportation device can also be applied to a soil discharging device of a shield machine for excavating earth and sand in a slurry form.

[0018]

As described above, according to the present invention, the dredged material that is scraped and put into the input port together with water is
Conveyance in which the fluid is stagnate in the staying dewatering unit, pressurized and dehydrated, gradually made into a soft state containing some water, gradually sent to the outlet, and continuously jetted from the pneumatic fluid passage opened at the end of the shaft toward the outlet. Since it is carried out through the transportation pipe by the use gas, it can be inserted in the middle of the transportation route with a very simple structure.For example, when it is installed in the dredging device that moves the water bottom and dredges the sediment, It is possible to drastically reduce the water content of the dredged material to be transported to the land, and to efficiently and continuously transport the material, and also to simplify the treatment after transportation.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a dredged object transporting device of a barge device for dredging.

FIG. 2 is a schematic configuration diagram showing a dredged material conveying device.

[Explanation of symbols]

 1 Ship 2 Dredging device 3 Solid water separation device 8 Scraper 9 Screw feeder 10 Dredged material transport device 11 Shaft 11a Air supply air passage 12 Screw blade 13 Casing 14 Input port 15 Outlet 16 Transport pipe 17 Retention dewatering part 17a Reduced diameter part

Claims (1)

[Claims] Claim: What is claimed is: 1. A dredged material inlet is formed at one end of the casing, and the other end of the casing has a screw blade with a shaft.
The screw vane is removed and the outlet is narrowed to provide a retaining / dehydrating portion of the dredged material having a drainage portion, and the pneumatic fluid passage formed in the shaft faces the outlet of the retaining / dehydrating portion at the end of the shaft. Along with opening, the dredged material dehydrated in the staying dehydration section by the gas continuously ejected from the air supplying fluid passage is configured to be transported by air through a transport pipe connected to the outlet of the staying dehydration section. A dredged material conveying device characterized by the above.