JPH02153124A - Dredging apparatus - Google Patents

Abstract

PURPOSE:To reduce a treatment cost by arranging agitating paddles saliently on the lower screw shaft of a plough set at the tip side of a vertical screw conveyor. CONSTITUTION:By the rotation of a plough 5 set at the tip side of a vertical screw conveyor 1, sludge on the periphery of an taking-in section is agitated, and is permitted to flow softly, and is taken into the conveyor 1 via a screen 11, an inner blade 8, and an outer blade 9. Then, by agitating paddles 20 arranged on a lower screw shaft 3a, the fluidity of the sludge is promoted further and by screws 3, a rise force is applied to, and the sludge is shifted to a jet side. As a result, suction efficiency can be improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used, for example, when dredging soft mud such as sludge accumulated in water intakes of power plants, seabeds, N-swamps, river ports, etc. This relates to dredging equipment.

[Conventional technology] There is a pump type dredging device as a conventional dredging device.

This pump-type dredging device has a large-capacity pump installed on a single boat or the like, and a hose is extended from the pump to the bottom of the sea or lake, and the soft mud is sucked up along with the trees. The soft mud dredged in this way is mainly transported to the landfill by transport ships. At the landfill, solidifying agents and flocculants are added to solidify the waste.

[Problems to be Solved by the Invention] However, in the conventional dredging equipment described above, the amount of water that is sucked up at the same time as the soft mud is so large that the solidifying agent cannot be mixed until after the surplus water has been treated. The drawback is that water treatment requires a lot of money.

[Means for Solving the Problems 1] The dredging device of the present invention is one in which blows are rotatably provided on the tip side of a vertical screw conveyor, and a plurality of blows are arranged at predetermined intervals in the vertical direction. Scribes set up,
The screw conveyor has a structure in which a stirring blade is provided integrally with the screen and disposed in a direction perpendicular to the screen, and a stirring paddle is provided protruding from the screw shaft at the bottom of the screw conveyor.

[Function] In the dredging device of the present invention, the soft mud around the intake portion is stirred and softened by the rotation of the plow, and the soft mud is fluidized, and the soft mud is taken into the vertical screw conveyor by the scraping blade.

The soft mud that has reached the inside of the screw conveyor is further fluidized by a stirring paddle attached to the screw shaft, and is transferred to the discharge side by being given an upward force by the screw blades.

[Example] Hereinafter, the present invention will be described in detail using examples shown in the drawings.

FIG. 1 is a sectional view of a main part showing one embodiment of a dredging device according to the present invention, FIG. 2 is an enlarged front view of a dredging device a, and FIG. 3 is a sectional view taken along line m--■ in FIG. The vertical screw conveyor 1 includes a cylindrical body 2 and a screw 3 which is rotatably housed in the cylinder 2. The screw 3 lifts soft mud such as sludge. It is now possible to do so.

The screw 3 is connected to a motor (
(not shown), and is configured to be rotationally driven by the motor.

A plow 5 having digging and stirring functions is provided at the tip of the vertical screw conveyor I.

This plow 5 is rotatably provided coaxially with the screw 3, and includes a rotary cylinder 6 rotatably provided on the outer periphery of the cylinder body 2, a rotary cylinder 6° having the same diameter as the cylinder body 2, and A canopy-shaped casing 7 fixed to the outer periphery of the rotating cylinder 6', an inner blade 8 and an outer blade 9 for scraping extending downward from the casing 7, and the blades 8.9.
The structure includes a plurality of screens 11 arranged horizontally so as to be orthogonal to the screen and spaced apart from each other by a predetermined distance in the upper F direction, and having a rake 10 on the outer circumferential side.

As shown in detail in FIG. 3, the inner blade 8 is provided so as to be located around the stirring paddle 20 provided on the screw shaft 3a, and is attached to the tip bearing of the screw 3 by a bracket 8a extending in the radial direction. Block 3A of
is connected to.

The outer blade 9 is arranged around the inner blade 8, and the rotation of the inner blade 8 and the outer blade 9 draws surrounding soft mud into the cylinder body 2.

The screen 11 is for preventing large rocks and foreign objects from entering the cylinder 2 through the plow 5.
As shown in FIG. 3, it consists of a substantially triangular bar screen, and the blades 8.9 are each fixed to the screen 11 by welding. As shown in FIG. 2, the tip of each rake 10 is slightly bent in the vertical direction, and the screen 11 rotates while digging with its teeth to prevent foreign matter from clogging it.

As shown in FIG. 1, the rotary cylinder 6 and the rotary cylinder 6° are mounted coaxially with the cylinder body 2 of the shaping screw conveyor 1 and rotatable around the axis.

Further, a rack gear 12 is provided around the upper part of the rotary cylinder 6, and the rack gear 12 is connected to a pinion gear 13.
It is in a state of constant engagement. This pinion gear 13 is
It is fixed to the lower end of a drive shaft 14 extending along the side surface of the cylindrical body 2 . Further, the to end of the drive shaft 14 is connected to a motor 15 disposed on the E section side of the cylindrical body 2,
The drive shaft 14 is driven by the motor 15. The rotary cylinder 6 is rotatably driven via a pinion gear 13 and a rack gear 12. and.

Rotating tube 61 Rotating tube 6° and plow 5 suspended thereon
is rotatably supported by a thrust bearing 16 mounted on the cylindrical body 2. Furthermore, the lower end of the cylinder 2 is connected to the fourth
As shown in the figure, the two-stage gland packing 6a, 6b prevents wood from entering into the double cylinder, similar to the upper gland packing 17.

On the other hand, on the screw shaft 3a below the plow 5, a plurality of stirring paddles 20 are provided radially projecting in the radial direction at equal intervals. It is installed at an angle.

Next, the operation of the dredging device configured as follows will be explained. The plow 5 is positioned at the tip of the vertical screw conveyor 1 by operating the drive device of a dredger (not shown).
is inserted into the soft mud at the bottom of the water, and the drive device (not shown) for the screw 3 is rotated, and at the same time, the motor 15 is rotated.

The rotation of the motor 15 also rotates the plow 5 via the rotary cylinder 6, and the rotation of the plow 5 stirs and fluidizes the soft mud around the intake part, and the inner brake 1ζ
8 and outer blade 9 take soft mud into the cylinder 2 via the plow 5. At this time, foreign matter mixed in the soft mud is prevented from entering the blow 5 by the screen 11, and the rake 10 It is discharged outward along the surface.

On the other hand, the soft mud introduced into the cylinder 2 from inside the plow 5 is further stirred by the stirring paddle 20 to further promote fluidization, and then the screw 3 located directly above it rotates to move the soft mud into the cylinder 2.
For example, soft mud discharged from a vertical screw conveyor is mixed with a solidification agent, and then transported to a slow ship or pumped. Dumped into a landfill via a hose, etc.

In addition, if the diameter of the screw 3 is large, the screen 11
The vertical distance between them may be increased.

- On the other hand, if a vertical bar is provided between each nuclear screen 11 and the space between the screens 11 is made into a so-called base hole, it is possible to prevent even smaller foreign matter from entering.

[Effects of the Invention] As described above, according to the present invention, the soft mud is introduced into the screw conveyor in a state where surplus water is reduced, so that it is possible to significantly reduce the cost of soft mud processing.

In addition, a rotatable plow equipped with a scraping blade and a screen is provided at the tip of the screw conveyor, and a stirring paddle further promotes fluidization, so that the soft mud flows into the screw conveyor. Since the intake efficiency is improved and foreign matter can be prevented from entering the screw conveyor, smooth operation of the screw conveyor can be ensured.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of essential parts showing one embodiment of the dredging device according to the present invention, Fig. 2 is an enlarged front view of the plow, Fig. 3 is a sectional view taken along the line ■-■ of Fig. γ, and Fig. 4 is FIG. 3 is a partially enlarged sectional view of the lower end of the cylindrical body. l... Vertical screw conveyor, 2... Cylindrical body, 5...
・Plow, 6, 6'...Rotating tube, 8
... Inner blade, 9 ... Outer blade, 11 ... Screen, 20 ... Stirring paddle. Figure 2 Figure 4 Patent applicant Ube Industries, Ltd.

Claims (1)

[Claims] (1) A vertical screw conveyor, a plurality of screens rotatably provided at the lower end of the vertical screw conveyor and spaced apart from each other by a predetermined distance in the vertical direction; What is claimed is: 1. A dredging device comprising: a blow having scraping blades arranged in intersecting directions; and a dredging device, characterized in that a stirring paddle is protruded from a lower screw shaft of the vertical screw conveyor.