JPS634129A - Mud conveyor for dredging equipment - Google Patents

Abstract

PURPOSE:To improve the efficiency of mud conveyance, by a method wherein a rotary screen for passing mud only outside a drum is set, wherein hooked clicks are formed on the internal surface of the screen, and wherein a discharging chute for discharging the foreign matters of a specified size or more outside the drum is set. CONSTITUTION:From the filter screen 7 of large meshes of a hopper 6 with mud M hoisted from the water bottom by gloves, rough foreign matters or the like are removed, and are fed to a drum-formed rotary screen 10 by a feeder 9. Then, the rotary screen 10 is rotated in the direction of an arrow head R, and the mud M of a specified size or less is passed and is fed to a mud-conveyance pump 5, and the foreign matters G of the rubbish and the like of a size not passing through rotary screen 10 is discharged to an external recovery bucket 19 through a rubbish discharging chute 18 from the upper section of the screen 10. Besides, on the internal surface of the rotary screen 10, a plurality of hooked clicks 17 are arranged, and the mud M is crushed, and by the help of the clicks 17, the foreign matters G are smoothly discharged outside the screen 10.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a mud feeding treatment device of a dredger. In particular, the present invention relates to a mud feeding treatment device installed on a dredger so as to improve mud feeding efficiency by processing the mud through appropriate filtering.

[Prior art]

Traditionally, dredgers used for dredging soft mud on the water bottom use grabs installed on the hull to pull up mud from the water bottom (after putting the mud into a hopper installed on the ship, The mud is sent to a designated location via a mud pump installed, and the mud is transported to a designated location via a mud pipe.At this time, the large bulky garbage contained in the mud lifted onto the ship is removed. It is screened and removed by a coarse mesh screen in the hopper.

However, the conventional screening method described above only removes bulky waste, etc., and there is a problem that the waste below the screen mesh is sent as is to the mud pump along with the mud. There is a problem that the supply to the slurry pump is not carried out smoothly, and the efficiency of mud feeding may decrease.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned conventional problems, and improves the efficiency of mud pumping by treating the mud lifted on a dredger through appropriate filtering and then supplying it to a mud pump. The purpose of this invention is to provide a dredger mud feeding treatment device that can be scaled.

[Structure of the invention]

In order to achieve the above-mentioned object, the structure of the mud feeding treatment device for a dredger of the present invention is such that mud is pulled up from the bottom of the water by a grab, filtered on board the ship, and then transported to a predetermined location via a mud pump. A dredger that feeds mud has a feeder that can feed the mud into the drum as a filtering means, and a screen that allows only mud of a predetermined size or less to pass outside the drum is installed on the circumferential surface of the drum. The present invention is characterized in that it is provided with a rotating screen having a rotary screen, a large number of hooks on the inner surface of the rotating screen, and a garbage discharge chute capable of discharging foreign matter larger than the predetermined size from inside the drum to the outside.

〔Example〕

The present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view of a dredger according to an embodiment of the present invention, and FIG. 2 is an enlarged plan view of the main parts of the mud feeding treatment device shown in FIG. 3 is a side view showing a cross section of the main part in FIG. 2, and FIG. 4 is a front view of the main part seen from the rotating screen side in FIG.

First, the dredger 1 shown in Fig. 1 has almost the same functions as conventional dredgers, and has a boom 2 installed on the hull.
The grab 3 installed at the end of the boom 2 is lowered to the bottom of the water (not shown), grabs the soft mud M on the bottom of the water, and then lowers the boom 2.
is raised from the position indicated by the two-dot chain line A to the position indicated by the dashed line B in the figure and rotated to drop the mud M from the grab 3 into the hopper 6 on board the ship, and the mud M is then processed by the mud processing apparatus of the present invention. In addition to filtering, the mud M is pressurized by a mud pump 5 also installed on the ship, and then sent to a predetermined location from the other end of the ship via a mud pipe 16. .

Therefore, in the mud treatment apparatus of this embodiment, the hopper 6 is
Inside is a coarse filter screen 7 as shown in FIG.
A filter screen 7 is provided to remove coarse foreign matter and the like.

Next, the mud M that has passed through this filter screen 7 is
As shown in FIG. 3, a screw-type feeder 9 provided at an inclined angle at the bottom of the hopper 6 and rotated by a motor 8 supplies the material to the lower part of a drum-shaped rotating screen 10.

Next, this rotating screen 10 is arranged such that horizontal members 10B are arranged at regular intervals with respect to ring-shaped members 10A arranged at regular intervals.
By arranging a mesh, a predetermined mesh is provided on the circumferential surface of the drum, which is further rotated by a motor 12. For example, in this embodiment, each ring-shaped member 10A and the horizontal member 10B, Each is spaced 40a+m apart.

Therefore, the mud M supplied to this rotating screen 10, if it is less than 40w+m, passes through this rotating screen 1O and falls into the screen hopper 13 as shown by the arrow M, and then passes through the mud feeding hose 14 to the hopper 15 with a pump. As shown in FIG. 1, mud is fed to a predetermined location from a mud feeding pipe 16 via a mud feeding pump 5.

Furthermore, as shown in FIG. 4, a large number of hooks 17 are provided on the inner surface of the rotating screen 10, and from the top inside the rotating screen 10 to the outside thereof, as shown in FIGS. 2 and 4, A dust discharge chute 18 is provided which can discharge foreign matter G such as dust with a size of 40 mm or more to the outside of the rotating screen IO.

To explain the functions of the mud feeding and processing device of the present invention having the above configuration, the mud M is pulled up from the bottom of the water by the grab 3 and dropped into the hopper 6, and the coarse foreign matter is removed by the coarse filter screen 7. After that, the feeder 9 feeds it into a drum-shaped rotating screen 10 .

As the rotating screen 10 rotates in the direction of arrow R, mud M of a predetermined size or smaller passes through the rotating screen 10 and is sent to the mud pump 5 side. G is a garbage discharge chute 18 from the top by rotating the rotating screen 100 times.
The garbage falls upward and is discharged into an external garbage collection packet 19 by the slope attached to the garbage discharge shade 18.

Here, since a large number of hooks 17 are provided on the inner surface of the rotating screen 10, the foreign matter G is caught by these hooks 17 when the rotating screen 10 rotates, and easily rises to the top due to gravity. Garbage discharge chute 1
Due to the water injection from the water injection pipe 21 installed on the discharge chute and the inclination of the discharge chute, foreign particles G
will be smoothly carried out of the rotating screen 10.

Furthermore, the hooking claws 17 also have a function of crushing the mud M supplied into the rotating screen 10, and help when the mud M is filtered by the screen 11.

- On the other hand, in this embodiment, as shown in FIG. 4, a fountain nozzle 20 is provided at the top of the rotating screen 10, which prevents mud M from adhering to the screen 11 and clogging it. This fountain nozzle 20 can also improve filtering efficiency and mud treatment ability.The rotation speed of the rotating screen 10 can be changed depending on the quality of the soil and the amount and quality of foreign matter.

〔Effect of the invention〕

As explained above, if a dredging vessel is equipped with the mud feeding treatment device of the present invention, filtering of the mud being sent will be performed more strictly and more efficiently than conventional devices, and the mud feeding hose, This has the effect that the inside of the mud feeding system such as the mud pump is prevented from being clogged with foreign matter such as garbage contained in the mud being pumped, and the mud feeding efficiency is increased accordingly.

As a result, the present invention is extremely effective in reducing dredging work time and work costs.

[Brief explanation of drawings]

FIG. 1 is a side view of a dredger according to an embodiment of the present invention, FIG. 2 is an enlarged plan view of the main parts of the mud feeding treatment device shown in FIG. 1,
Figure 3 is a side view showing a cross section of the main part of Figure 2, and Figure 4 is a side view of the main part shown in Figure 2.
FIG. 3 is a front view of the main parts seen from the rotating screen side in the figure. 1... Dredger, 3... Grab, 5... Sludge pump, 9... Feeder, 10... Rotating screen, 17
...Hook claw, 18...Garbage discharge chute, G.
... Foreign matter, M...Mud.

Claims (1)

[Claims] The mud can be fed into the drum as a means of filtering in a dredger that filters the mud pulled up from the bottom of the water by a grab on board and sends the mud to a predetermined location via a mud pump. A rotary screen is provided on the circumferential surface of the drum, which has a feeder, and a screen that allows only mud of a predetermined size or less to pass outside the drum, and a large number of hooking claws are provided on the inner surface of the rotary screen, and A mud feeding treatment device for dredging equipment that is provided with a garbage discharge chute that can discharge foreign matter larger than the predetermined size from inside the drum to the outside.