JPH0686741B2 - Dredging device - Google Patents

Description

The present invention relates to a dredging device, and more particularly to a sludge dredging device using a slide drilling blade.

[Conventional technology]

Conventionally, the sand dredging such as sludge uses a grab 1 as shown in FIG. 11 or a rotary excavator 2 as shown in FIG. 12 and a sediment suction pipe 3 using a centrifugal pump. It has been known.

[Problems to be Solved by the Invention]

However, the grab dredging as shown in FIG. 11 has a problem that a large amount of polluted water is discharged in the underwater portion and the draining portion after excavation, which deteriorates the surrounding water quality. Further, there is a drawback that the work efficiency is low due to intermittent excavation.

Further, in the conventional centrifugal pump suction type dredging device as shown in FIG. 12, a large amount of dredging surplus water is generated due to the method of dredging mud with water, and the landfill disposal site of dredging mud is secured, and dredging is carried out. There is a problem that the treatment of extra water is very expensive. Also, when the mud to be dredged has a viscosity, it is difficult to suck with a pump, so it is often stirred with the surrounding water to improve the fluidity of the mud and suck it, but this causes the mud to swell and be removed. There is a problem that the amount of landfill mud becomes larger than the amount of mud.

The present invention eliminates the above drawbacks.

[Means for Solving the Problems]

The dredging device of the present invention is a rotary barrel portion, a rotary drilling machine portion having a plurality of slide drilling blades capable of projecting radially outward from the outer periphery of the rotary barrel portion, a mechanism for driving the slide drilling blade, A fixed cutting machine part having plate-shaped bottom surface cutting blades arranged opposite to each other on the outer periphery of the rotary body portion with a desired gap, and a mechanism for lifting mud cut from the ground by the slide excavation blade and the bottom surface cutting blade. And consist of.

[Action]

In the dredging device of the present invention, the mud is gently separated from the ground to prevent pollution, and only the mud is lifted.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

The dredging device of the present invention includes a rotary excavator unit 4 for excavating earth and sand, and the rotary excavator unit 4 as shown in FIGS. 1 to 3.
It is composed of a fixed cutting machine part 5 cooperating with the above, and a pump part 6 for sending the excavated earth and sand.

As shown in FIGS. 4 and 5, for example, the rotary excavator unit 4 includes a spinning wheel-shaped rotary excavating blade 9 composed of a body portion 7 and left and right side excavating blades 8 and a plurality of sets of slide excavating blades 10. To be done.

The slide drilling blades 10 of each set are two plate-like drilling blades 10a and 10b.
Are integrally connected by a connecting rod 11, penetrate through a slit 12 cut in the body portion 7 and are installed symmetrically about the rotation axis. At this time, the connecting positions of the connecting rods 11 of each set are changed for each set of the slide excavating blades 10 so as not to intersect with each other.
The length between the cutting edges of the pair of slide drilling blades 10 is adjusted to be equal to the sum of the radius of the body portion 7 and the radius of the side drilling blades 8.

A slide guide groove 12 'is provided on the inner surface of the side surface excavating blade 8 in order to facilitate the movement of the slide excavating blade 10, and the groove end on the rotation center side also serves as a stopper for preventing the slide excavating blade 10 from falling off. . The rotary shaft 13 of the rotary excavating blade 9 is attached to the outer surface of the side excavating blade 8 so as to project, is suspended by a bearing 15 attached to a fixed base 14, and is rotated by a rotary excavator drive motor 16.

The rotary excavator unit 5 is held from a fixed base 14, and a cover 17a that covers a part of the outer periphery of the body portion 7 of the rotary excavating blade 9,
A plate-shaped bottom cutting blade 18 for horizontally cutting mud, a cover 17b connecting the upper end of the bottom cutting blade 18 and one end of the cover 17a, and an excavating blade pushing guide for sliding the slide excavating blade 10. It is composed of a plate 19.

As shown in FIG. 2, the digging blade pushing-in guide plate 19 is in contact only with both axial end portions of the cutting edge of the slide digging blade 10, and as the rotary digging blade 9 rotates, the cutting edge of the slide digging blade 10 becomes It is curved so as to be gradually stored from the outer periphery of the side surface cutting blade 8 into the body portion 7.

A screw conveyor 20 and a motor 21 for driving the screw conveyor 20 are installed to discharge the mud to the outside of the cover 17b.

Further, a pump (not shown) is connected to the discharge port 22 of the screw conveyor 20, and a pipe line (not shown) is laid from the discharge port of the pump to a predetermined lifting port. As this pump, a constant flow rate controllable pump such as a piston type pump or a tube type pump is used.

6 and 7 show a case where the dredging device of the present invention is applied to a pump type dredger, 23 is a pump type dredger, 24 is a rudder, 25 is an attitude control mechanism, 26 is a dredging device, 27 is Indicates a barge.

Since the dredging device of the present invention has the above-mentioned configuration, it is a ladder.
If this is driven so that the peripheral speed of the rotary excavator unit 4 matches the swing speed of 24, as shown in FIG. 8, the slide protruding outward from the body portion 7 of the rotary excavator unit 4 in the radial direction. With the excavating blade 10 and the excavating blades 8 on both sides, gently incisions are made in the front, rear, left and right of the mud, and the mud is cut by the bottom cutting blade 18.

The mud excavated in this way is separated from the ground and pushed into the cover 17b by the slide excavating blade 10.

To remove excess water that has entered with the mud when taking in the mud, a water drainage hole 28 is provided in the slide excavating blade 10 as shown in FIG.

In the cover 17b, the slide excavating blade 10 is gradually stored in the body portion 7 by the pushing guide plate 19, so that there is no partition between the excavated mud and the mud is continuously pushed into the screw conveyor 20 without water intrusion. Be done.

The mud that has entered the screw conveyor 20 is continuously discharged to the outside of the dredging device, by a connected piston type pump, or a pump capable of constant flow control such as a tube type pump,
It is pumped to the specified pumping port without being agitated with the surrounding water, which has a water content ratio equivalent to that of the dredged ground. At this time,
By pressing mud against a constant flow rate pump with a screw pump, even under construction conditions such as overlap dredging and thick dredging of thin layer soil, where water can be easily sucked, by controlling the pump flow rate, water-free dredging can be maintained.

FIG. 9 shows the pump section 6, the covers 17a and 17b, the bottom cutting blade 1
8, the digging blade pushing guide plate 19, and the screw conveyor 20 are symmetrically provided on both sides of the body portion 7, the pulling mechanism 29 is connected to each bottom cutting blade 18, and the rudder 24 swings in any direction. However, another embodiment of the present invention in which dredging is possible is shown. In this embodiment, one of the bottom surface cutting blades 18 is moved to the retracted position by the retracting mechanism 29 according to the swing direction.

FIG. 10 shows a plurality of hydraulic pressures for excavating blades extending radially outward from the center of the body portion 7 without using the covers 17a, 17b, the excavating blade pushing guide plate 19 and the slide excavating blade 10 in the above embodiment. A further embodiment of the present invention using a cylinder 30 and a slide drilling blade 31 that is advanced and retracted by each of the hydraulic cylinders 30 for drilling blades so as to selectively project from the outer peripheral surface of the body portion 7 is shown. According to the embodiment, the structure can be extremely simple.

Reference numeral 32 indicates a switching valve for the left and right dredged soil discharge ports.

〔The invention's effect〕

According to the present invention, in the mud dredging work of rivers and harbors, the intrusion of excess water is suppressed as much as possible, non-stirring, and dredging and pumping mud at a water content ratio equivalent to that of the dredged ground, and the occurrence of pollution during dredging It is possible to easily obtain a small amount of dredging device.

[Brief description of drawings]

FIG. 1 is a front view of the dredging device of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a vertical sectional front view of an essential part thereof, and FIG. 4 is a perspective view of the rotary excavator part thereof. Is a perspective view of a slide drilling blade, FIG. 6 is a side view when the dredging device of the present invention is applied to a pump-type dredger, FIG. 7 is its plan view, and FIG. 8 is an excavation state by the dredging device of the present invention. FIG. 9, FIG. 10 and FIG. 10 are explanatory views of other embodiments of the dredging device of the present invention, FIG. 11 and FIG.
FIG. 12 is an explanatory view of the conventional device. 1 ... grab, 2 ... rotary excavator, 3 ... earth and sand suction pipe, 4 ... rotary excavator part, 5 ... fixed cutting part, 6 ...
… Pump part, 7 …… Body part, 8 …… Side drilling blade, 9 …… Rotary drilling blade, 10,31 …… Slide drilling blade, 10a, 10b …… Plate drilling blade, 11 …… Connecting rod, 12 …… Slit, 12 ′ …… Slide guide groove, 13 …… Rotary shaft, 14 …… Fixed mount, 15 ……
Bearings, 16,21 …… Motor, 17a, 17b …… Cover, 18 …… Bottom cutting blade, 19 …… Drilling blade pushing guide plate, 20 …… Screw conveyor, 22 …… Discharge port, 23 …… Pump dredger , 24 …… Ladder, 25 …… Attitude control device, 26 …… Dredging device, 27 …… Barge, 28 …… Water drainage hole, 29 …… Retraction mechanism,
30 …… Hydraulic cylinder for drilling blade, 32 …… Switching valve.

Claims (5)

[Claims] 1. A rotary excavator unit having a rotary barrel portion and a plurality of slide excavating blades capable of projecting radially outward from the outer periphery of the rotary barrel portion, a mechanism for driving the slide excavating blade, and A fixed cutting machine section having plate-shaped bottom surface cutting blades arranged opposite to each other on the outer periphery of the rotary body portion with a desired gap, and a mechanism for lifting mud cut from the ground by the slide excavation blade and the bottom surface cutting blade. A dredging device comprising: 2. The dredging device according to claim 1, wherein the mechanism for driving the slide excavating blade is a hydraulic cylinder for an excavating blade provided in a central portion of the body portion. 3. A rotary excavator unit having a rotary barrel portion and a plurality of slide excavating blades capable of projecting radially outward from the outer periphery of the rotary barrel portion, and a desired gap on the outer periphery of the rotary barrel portion. A fixed cutting machine part having plate-shaped bottom cutting blades arranged opposite to each other, a first cover part covering a part of the outer periphery of the rotary body part, one end of the first cover part and the plate-shaped part Gradually rotating the cover including a second cover portion connecting upper ends of the bottom cutting blades, and the slide drilling blade positioned between the upper end portion of the bottom cutting blades and the one end of the first cover portion. A dredging device comprising: an excavating blade pushing-in guide plate for pushing toward the outer periphery of the trunk portion; and a mechanism for lifting mud cut from the ground by the slide excavating blade and the bottom cutting blade. 4. The dredging device according to claim 1, wherein the rotary barrel portion is a spinning wheel shape including a central cylindrical portion and side drilling blades located on both sides of the central tubular portion and having a larger diameter than the central cylindrical portion. 5. The slide excavating blade comprises two plate-shaped excavating blades and a connecting rod that connects the two plate-shaped excavating blades in a state in which they are separated from each other. 2. The dredging device according to claim 1, wherein when one is engaged with the first cover portion, the other is maximally projected from the outer periphery of the body portion and engaged with the bottom surface cutting blade.