JPH0221973A - Device for removing obstruction in dredged earth and sand of grab pump dredger - Google Patents

Abstract

PURPOSE:To automatically and exactly remove obstructions such as sunk trees and rocks from earth and sand by disposing a screening grid constituted by combining a wire screen and a grid bar screen on a dredged earth and sand charging hopper and by providing a rotary scraper which scrape the grid surface while moving along the front surface of the screening grid. CONSTITUTION:The earth and sand smaller than the spacings of the screening grid 12 are dropped and the obstructions 13 such as rocks and sunk trees larger than said spacings are made to remain on the screen 12 when the earth and sand dredged by a grab bucket are charged into the grid 12. The obstructions on the grid 12 are further scraped and removed by moving the rotary scraper 14 along the longitudinal direction of the grid bars 26 on the grid bar screen 27 while rotating the same. The obstructions 13 plunged to the meshes of the grid constituted of the grid bar screen 27 and the wire screen 25 are kicked up by rotation of the rotary scraper 14 and are pulled out. These obstructions are removed by movement of the scraper 14.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is used in a club pump dredger to remove foreign matter, rocks, etc. from the dredged soil using a grab bucket so as not to interfere with the pumping of the dredged soil. The present invention relates to a device for removing obstacles.

(Conventional technology) Conventionally, when dredging sediment that has accumulated on the bottom of a tam, a method has been adopted in which the dredged sediment is transported by pump, and in this case, it is necessary to remove obstacles that impede pump transportation. The following methods are available for selecting and moving obstacles.

First, the sorting methods are: ■ using a horizontal or inclined fixed crisscross; ■ using a vibrating crisscross that vibrates the crisscross; ■ using a trommel with a net-like rotating body; and ■ targeting small lumps. There are methods such as using a vibrating sieve.

In addition, methods for moving the remaining obstacles include: (1) attaching a slope to a crevice or the like and moving it by applying vibrations; and (2) moving the feeder itself.

(Problem to be solved by the invention) However, the accumulated soil of the tom contains submerged water of various shapes and weights such as tree roots, trunks, and twigs, and it is complicated and difficult for the sorter's krizbar and mesh to be mixed. , they get stuck irregularly, making it difficult to remove them, requiring a great deal of effort to remove the obstacles, and reducing the efficiency of dredging.

Furthermore, if the permeation gap of the Grizzlipper or mesh were made larger, it would be easier to remove the trapped water to some extent, but small and medium-sized sunken wood would be mixed in with the permeated soil.
There is a problem in that it does not cause any adverse effects on pump transportation.

In view of these conventional problems, the present invention aims to provide a device for removing elongated objects in dredged soil for a grab pump dredger, which can automatically and accurately remove obstacles such as submerged water and rocks. This is the purpose.

(Means for Solving the Problems) A feature of the present invention that solves these conventional problems and achieves the intended purpose is that the dredged earth and sand are pumped together with water using a graph bucket. A sorting grid is provided on the dredged soil input popper of the club pump dredger to be transported, and a rotary scraper is provided on the screening grid to scrape the surface of the grid while moving along the upper surface of the screening grid. A wire screen formed by stretching a plurality of wire ropes in parallel through a splinter in a direction perpendicular to the moving direction of the rotary scraper, and a wire screen formed by stretching a plurality of wire ropes in parallel to each other in a direction perpendicular to the moving direction of the rotary scraper. The present invention relates to a device for removing elongated objects in dredged earth and sand for a club pump dredger, which is comprised of a crease screen formed by installing a plurality of bars in parallel.

(Function) When this device dumps the dredged earth and sand onto the sorting grid, the earth and sand smaller than the gap in the sorting grid will fall, and the obstacles such as larger rocks and submerged water will fall onto the sorting grid. left behind.

Obstacles on the sorting grid are scraped off and removed by rotating a rotary scraper and moving it along the length of the grid bar on the grid hearth screen. At this time, the obstacles that are sticking into the grid bar screens and wire screens are lifted up by the rotation of the rotary scraper and removed by the movement of the rotary scraper. When the rotary scraper lifts up an obstacle, the obstacle is first pressed against the wire rope by the movement of the rotary scraper, and as the rotary scraper continues to move in this state, the wire rope stretches due to the action of the spring, and at the same time a reaction force is applied. occurs, allowing the obstacle to move horizontally while preventing it from falling, while the rotation of the rotary scraper pushes the obstacle up and pulls it out.

(Example) Next, an example of implementation of the present invention will be described with reference to the drawings.

As shown in Figure 1, a crawler crane 2 is mounted on the hull of the pump dredger.
Craft hackets 1 to 4 are suspended from a crane 2 via a winch 3, and the craft packet 4 is lowered to excavate earth and sand at the bottom of the water, hoisted onto the ship, and placed above the earth and sand input hopper 5 at the center bottom of the hull 1. I'm trying to drop it on .

A suction head 6 is inserted into the earth and sand input hopper 5 to stir the earth and sand together with water and suction the slurry, and the slurry sucked by the suction head 6 is pumped to a distant place by a pump 7.

An obstacle removal device A is provided on the earth and sand input hopper 5 of the club-pump dredger constructed as described above for removing obstacles that interfere with pumping by the pump 7.

This obstacle removing device A will be explained below with reference to FIG. 2 and the subsequent drawings.

This obstacle removing device A has a first sorting grid 11, a second sorting grid 12, and a rotary scraper 14 that scrapes off obstacles 13 while moving on the second sorting grid 12, arranged above and below.

The first sorting grid 11 is arranged on the hull 1 as shown in FIGS. 2 and 3.
A rectangular turning frame 16 supported on a pedestal 15 erected on the
Inside this rotating frame 16, a large number of roller-shaped grid bars] 7 are arranged parallel to each other and spaced apart from each other at regular intervals, and each is horizontally suspended so as to be freely rotatable. The spacing between the crid bars 17 is such that submerged water and rocks in the large and medium-sized pipes do not pass through, and small lumps that impede pumping can pass through. Furthermore, a high flake 18 is fixed on the rotation frame 16. Note that this pie flake 18 may be omitted.

One side edge of the rotating frame 16 is fixed to one support shaft. The support shaft 19 is rotatably supported on the pedestal 15 by bearings 20, and is supported by guard motors 21 provided at both ends.
As a result, the rotating frame 16 is rotated from the position shown by the solid line in FIG. 3 to the side as shown by the overhead wire.

In addition to this, a hydraulic cylinder may be used as the driving means for the rotating frame 16.

Although not shown, the first sorting grid 1] uses a rectangular or round grid bar instead of the roller-shaped grid bar 17 described above, and arranges it in a grid shape within the rotation frame 16 or rotates it. It is also possible to securely fix both ends of the frame 16 to the rotation frame 16 in the direction of the rotation radius.

23rd! ! The separate grid 12 is disposed below the first sorting grid 11, and a wire is inserted between a pair of slightly inclined kite rails 22 via a spring 23 in a direction perpendicular to the moving direction of the rotary scraper 14. low 1
24 stretched in parallel, and a grid hearth screen formed by installing a plurality of crid bars 26 in parallel on the wire screen 25 in a direction parallel to the moving direction of the rotary scraper 14. It consists of 27. grid bar 26
is supported by a support (not shown) that is integrated with the kitrail 22. The transmission gaps between the grid bars 26 and the wire ropes 24 prevent even small lumps that have passed through the first screening grid 11 from passing through, and only earth and sand of a size that does not interfere with pumping are allowed to pass through the lower part. The intervals are set.

A flat chute 28 is fixed between the guide rails 22 at the upper end side extension of the grid par 26.

The rotary scraper 4 described above is configured to reciprocate from the lower end of the grid par 26 to the upper end of the chute 28. This rotary scraper 14 supports a pair of two carts running on each guide rail 22.
It is composed of a rotary scraper body 30 that rotates by being passed between the carts 29.The rotary scraper body 30 has a structure in which a plurality of rotary blades 32 are protruded radially from the outer periphery of a shaft 31. It has become.

The two carts are reciprocated by driving a pair of chains 33 disposed outside of both guide rails 22. Further, the rotary scraper main body 30 is also rotationally driven by the drive of the chain 33.

The chain 33 is wound around the sprocket 1 between 34a and 34b, and is operated by rotationally driving the sprocket 1 to the drive shaft 35 by a hydraulic morph 36 whose speed can be adjusted.

In addition, a hydraulic cylinder may be used as the means for moving and rotating the cart 29 and the rotary scraper 14.

In the figure, reference numeral 37 denotes a cleaning water injection nozzle, which injects a large amount of water at a higher pressure to the first and second sorting grids 11.1.
2, the passage of the earth and sand deposited on the lattice is promoted.

In the obstacle removal device A configured as described above, the dredged earth and sand dropped from the dredging bucket 4 is vibrated by the high flakes 18 on the clogs 1 to 1 of the first sorting grid 11, and Obstacles in the form of large and medium-sized lumps are left on the crud bar 17, and earth and sand containing small lumps are dropped downward.

2nd i! ! Obstacles 13 such as small lumps and pieces of wood are left on the gridiron screen 27 and wire screen 25 in the separate grid 12, and only the earth and sand of a size that does not interfere with pumping is allowed to enter the earth and sand input hopper 5 below. Injected.

On the other hand, impurities such as submerged water remaining on the clipper 17 of the first sorting grid 11 and obstacles such as large and medium rocks can be removed by rotating the first sorting grid 11 around the spindle 19.
It is dropped onto chute 28. At this time, since each grid parr 17 is constituted by a rotatable roll, the grid pars 17 are smoothly dropped without being jammed between the grid pars 17.

The removed obstacles 13 remaining on the second sorting grid 12 are scraped off by the movement of the rotary scraper 14 and loaded onto another carrier (not shown) from the chute 28 for transport.

At this time, the obstacle [3] that is stuck in the grid formed by the wire screen 25 and the crib bar screen 27 is lifted up by the rotation of the rotary scraper main body 30, and is extracted.
removed by movement. When the rotary scraper main body 30 hits the obstacle 13, first the obstacle 13 is the fifth one.
As shown in the figure, the wire rope 24 is pushed forward by the movement of the rotary scraper 14, and in this state, as the rotary scraper 14 continues to move as shown in FIG. A reaction force is generated at the same time as the obstacle 13 is sized or expanded, allowing the obstacle 13 to move horizontally while preventing it from falling.During this period, the rotation of the rotary scraper body 30 pushes up the obstacle 13 and removes it. Served.

In addition, in the first embodiment, the first i! ! Separate grid 11 and 2nd
The first screening grid 11 may be used together with the screening grid 12, or only the first screening grid 11 may be used.

(Effects of the Invention) As explained above, the obstruction removal device during dredging and crushing of a club pump dredger according to the present invention uses a screening grid that is a combination of a wire screen and a crid bar screen placed on the wire screen. The rotary scraper was rotated and moved over the sorting grid, and the wire screen was constructed by stretching a plurality of wire ropes in parallel via springs in a direction perpendicular to the direction of movement of the rotary scraper. Obstacles can be separated from the earth and sand by this sorting grid, and the obstacles remaining on the sorting grid can be scraped off and removed by the rotating movement of the rotary scraper 14. Moreover, the obstacles that are sticking into the eyes of the sorting grid can be extracted by rotating and flipping up the rotary scraper, and removed by moving the rotary scraper. In particular, the sorting grid uses a wire screen consisting of a plurality of wire ropes stretched in parallel through springs, and the wire ropes are stretched in a direction perpendicular to the moving direction of the rotary screen, so that the rotary scraper can When removing an obstacle stuck in the eye, the rotary scraper presses the obstacle against the wire rope, and as the rotary scraper continues to move in this state, the wire rope stretches due to the action of the spring. At the same time, a reaction force is generated, which prevents the obstacle from falling and allows the obstacle to move horizontally.During this time, the rotation of the rotary scraper allows the obstacle to be pushed up and extracted. There is an advantage that obstructions protruding into the eyes of the sorting grid can be easily removed without causing damage. Therefore, according to the present invention,
Regardless of the shape of the obstacle or the state in which it is stuck in the eyes of the sorting grid, the classification and removal of obstacles can be done accurately and quickly without the need for manpower, and the work efficiency can be significantly improved. .

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a side view showing a club pump dredger, FIG. 2 is a plan view of the obstacle removal device, and FIG. ■ Line cross section,
FIG. 4 is a partial perspective view of the second sorting grid, and FIGS. 5 and 6 are explanatory diagrams showing the process of removing obstacles stuck in the eyes of the second sorting grid with a rotary scraper. A. Obstacle removal equipment, Tocrab Pump dredger, 4...
Tarafuhaket 1~. 5 Earth and sand input hopper, 6 Suction head, 7 Pump, ]] 1st sorting grid, 12 2nd sorting grid, 22... Kai 1~Rail, 23 Splinter,
24・Wire rope, 25・Wire screen,
26. Crotch 1~bar, 27. Critter screen, 29 Dolly, 30. Rotary scraper body,
33...Jane, 36 Hydraulic motor.

Claims (1)

[Claims] A sorting grating is installed on the dredged earth input hopper of a grab pump dredger that pumps dredged earth and sand together with water using a grab bucket, and a rotary wheel is placed on the sorting grating and scrapes the surface of the grating while moving along the upper surface of the grating. A scraper is provided, and the sorting grid includes a wire screen formed by tensioning a plurality of wire ropes in parallel through springs in a direction perpendicular to the moving direction of the rotary scraper, and a wire screen formed by stretching a plurality of wire ropes in parallel with each other through a spring, and a wire screen on which the rotary scraper is placed on the wire screen. A device for removing obstacles in dredged earth and sand for a grab pump dredger, consisting of a grid bar screen formed by installing a plurality of parallel grid bars in a direction parallel to the direction of movement.