JPH0525970B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention collects sediments such as mud deposited on the bottom of water, etc., and sludge such as floating mud floating in a layer of approximately constant width on the bottom of the water. , relates to a dredging device that pumps collected sediment, floating mud, and other sludge directly to land etc. via a flexible mud pipe, and in detail, it is a dredging device that maintains a constant excavation depth while traveling on its own while submerged in water. This relates to dredging equipment that dredges sludge such as floating mud.

[Background of the Invention] In general, this type of submerged dredging device is disclosed in Japanese Patent Application No. 132839/1983.

As shown in FIGS. 3 and 4, this dredging device 1 includes a mud excavation mud collecting unit 10, a mud pumping unit 30 connected to a mud feeding pipe 20, and the entire dredging device 1, for example, by a backhoe (not shown). It consists of a suspension unit 40 that is attached to the tip of the arm and moves the entire device forward along the water bottom or rotates in the horizontal direction by the operation of the arm, and includes a mud excavation mud collection unit 10 and a mud pumping unit 30 are connected back and forth along the dredging direction, and the suspension unit 40 is fixed to the mud pumping unit 30. Water is prevented from being taken in by the shaft panel 109, and the collected mud such as floating mud and accumulated mud is forcibly sent to the mud pumping unit 30 by the forward force of the entire device and stored once.
The mud stored in the tank is pumped to a remote location via a mud pipe 20 using compressed air.

The mud pumping unit 30 includes two cylindrical pressure vessels 3 having a large diameter at one end and a small diameter at the other end.
1, 32 are arranged in parallel, each pressure vessel 31, 32
The large-diameter end sides of the pressure vessels 31 and 32 are connected to the first supply pipe 111 and the second supply pipe 112, and mud such as floating mud in the pressure vessels 31 and 32 is connected to the first supply pipe 111 and the second supply pipe 112. a first check valve 33 that prevents backflow to 10;
34 (33 is not shown), and second backflow valves 35, 36 are connected to the small diameter ends of each pressure vessel 31, 32 to prevent mud from flowing back into the vessel, and one end side is connected to a mud feeding pipe. Each branch pipe part 37a, 37 of the planar T-shaped collecting pipe 37 connected to 20
Second check valves 35 and 36 are connected to b, respectively.
A connecting pipe 38 is rotatably connected between the collecting pipe 37 and the mud feeding pipe 20 via a universal joint 38a.
is connected.

The pressure vessels 31 and 32 are formed to have the same structure, and main compressed air pipes 301 and 3 are provided at the top of the vessels, respectively.
Compressed air is controlled by a control device (not shown) and alternately supplied through the
For example, compressed air is supplied alternately at regular intervals, and both pressure vessels 31 and 32 are stiffened by a base plate 303 in order to connect the suspension unit 40 and to increase the rigidity of the entire pressure feeding unit. connected.

The first check valves 33 and 34 have the same structure, and a valve body 305 that is pivotably supported through a support shaft 304 toward the large diameter end of the pressure vessels 31 and 32 has an inclined cut end. It is designed to be in constant contact with the valve seat 306, and the first supply pipe 111 and the second supply pipe 111 and the second supply pipe are
Mud such as floating mud flows from the supply pipe 112 to the pressure vessels 31 and 3.
pressure vessel 3.
If compressed air is supplied to 1 and 32,
Valve body 305 due to the pressure inside pressure vessels 31 and 32
is pressed against the valve seat 306, and the pressure vessels 31,
The supply of mud such as floating mud into the interior of the tank 32 is prevented. At that time, in order to improve the sealing performance between the valve body 305 and the valve seat 306, a rubber sheet 30 is placed on the front surface of the valve body 305.
7 is installed. In addition, pressure vessels 31, 32
Containers 31 and 32 are easy to accumulate mud etc. at the bottom of the container.
Sub-compressed air pipes 308, 30 are installed at the bottom of the large-diameter end face of the
8 to supply compressed air to containers 31 and 3 during mud pumping.
This prevents mud from ejecting into the interior of the pressure vessels 31 and 32 and accumulating at the bottoms of the pressure vessels 31 and 32. On the other hand, the second check valve 3
5 and 36 are first check valves 33 and 3 in the valve box 310.
A valve element 312 and a valve seat 313 are provided with a rubber sheet 311 attached thereto, which has the same structure but different size as the valve element 305 and valve seat 306 of No. 4, and the container 3
Although mud such as floating mud is allowed to move from the pipes 1 and 32 to the collecting pipe 37, it is prevented from moving in the opposite direction.

That is, in the mud pumping unit 30 described above, when compressed air is not supplied into the pressure vessels 31 and 32, mud such as floating mud is supplied into the pressure vessels, and when compressed air is supplied, the first reverse The stop valves 33 and 34 operate to prevent the supply of mud such as floating mud, and compressed air is supplied to the pressure vessels 31 and 32 alternately.
while supplying compressed air to the other pressure vessel 3.
Mud such as floating mud is supplied to one of the pressure vessels 31 and compressed air is supplied to the second pressure vessel 31. The slurry is supplied from the branch pipe 37a of one of the collecting pipes 37 to the mud feeding pipe 20 through the stop valve 35, and is then pressure-fed to a remote location. At that time, the collecting pipe 37
Although the mud pressure is also applied to the other branch pipe section 37b,
Since the other second check valve 36 prevents mud such as floating mud from flowing backward from the collecting pipe 37 side, one pressure vessel 3
All the mud such as floating mud from 1 is supplied to the mud feeding pipe 20. When the pumping of mud such as floating mud in one pressure vessel 31 is completed, compressed air is supplied to the other pressure vessel 32 and the one pressure vessel 3
While the mud such as floating mud is being supplied into the pressure vessel 1, the mud in the other pressure vessel 32 is supplied to the mud feeding pipe 20, and by repeating this alternately, the mud such as floating mud is continuously pumped, In order to further improve mud pumping performance, collecting pipe 3
An auxiliary air pipe 39 is attached to 7 to blow out compressed air toward the mud feeding pipe 20.

By the way, such submerged dredging equipment has the excellent advantage of avoiding contamination of the surrounding water and being able to dredge with high mud content without absorbing water from the surrounding area. The tip of
Since it is attached to a rudder etc. to provide forward force and the depth is adjusted by adjusting the arm angle, it is difficult to dredge at a constant depth.
Another problem was that it lacked maneuverability, requiring complicated adjustments to the backhoe's arm, etc.

Furthermore, since the length of the arm and rudder of the batukuhoe is finite, the depth at which it can be dredged is limited, and it is not possible to work sufficiently in deep areas, and the above-mentioned depth adjustment is extremely difficult. It was hot.

[Purpose of the Invention] The present invention has been made to solve these problems, and is capable of continuously collecting underwater sediments and floating mud with a low water content, and can also be carried out directly from the dredging site to land, etc. It is an object of the present invention to provide a self-propelled dredging device that can improve excavation accuracy by driving a submerged dredging device that can be pumped through a mud feeding pipe while self-propelled at a constant depth, and at the same time has maneuverability. This is the purpose.

[Summary of the invention]

The gist of the present invention is to provide a self-propelled means in which gate-shaped frame members are fixed in the front and rear so as to straddle a pair of left and right track-type running bodies, and the front and rear frames. a floating block attached to the leg of the member so as to be movable in the vertical direction;
A position adjustment means is arranged between the left and right pair of track-feeding type traveling bodies to arbitrarily adjust the vertical position of the floating block with respect to the legs, and is arranged to excavate and collect the mud in the front while digging and collecting the mud in the rear. A mud collection and pressure feeding unit that continuously supplies mud into the pressure vessel and pumps the mud stored in the pressure vessel using compressed air through a mud feeding pipe, and a self-propelled mud collection and pressure feeding unit. A self-propelled dredging device characterized by comprising tilting support means supported by the front and rear frame members so as to be tiltable with respect to the traveling direction of the means.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail based on the embodiment shown in FIGS. 1 and 2. For the same parts between the structure in this embodiment and the structure shown in the conventional example, the same reference numerals used in the conventional example will be used. A description of the structure in the embodiment will be omitted.

FIG. 1 is a side sectional view of an embodiment of a self-propelled dredging device according to the present invention, and FIG. 2 is a sectional view from the rear side thereof.

In the figure, 50 is a front gate type frame, 51 is a rear side gate type frame, and a traveling device 54, which will be described later, is fixed between each leg 52 on the left side of both portal frames and between each leg 53 on the right side. and is adapted to move integrally with the traveling device 54. Reference numeral 54 denotes a traveling device in which a hydraulically driven driving wheel 55 and a driven wheel 56 are provided at the front and rear of a fixed frame part (not shown), and an endless track 57 is installed between the driving wheel 55 and the driven wheel 56, and the driving device moves over the water bottom. It is possible to drive.

A mud collecting and pumping unit consisting of a mud excavation unit 10 and a mud pumping unit 30 (consisting of one pressure vessel 31 in this embodiment) is connected to a mud collecting and pumping unit consisting of a mud excavation unit 10 and a mud pumping unit 30 (consisting of one pressure vessel 31 in this embodiment). A pair of first excavation angle adjustment cylinders 58 provided diagonally forward and a second excavation angle adjustment cylinder 59 provided downward from the center in the width direction of the rear gate frame 51 are connected via a universal joint (not shown). te3
Both gate-shaped frames 5 are suspended with point support.
By driving the first and second excavation angle adjustment cylinders 58 and 59, the mud collection and pressure feeding unit can be moved vertically and horizontally in the direction of travel. Its direction can be tilted to adjust the digging angle. Reference numeral 60 denotes a floater having a plurality of ballast tanks 61 inside, and each leg part 52 of the front and rear gate-shaped frames 50, 51 in the center part.
A through hole 62 through which the leg portions 53 pass is formed, and a cushioning rubber 63 is provided on the inner peripheral surface of the through hole 62 in order to soften the impact caused by the collision between the legs 52 and 53.

64 is an air vent pipe for venting air in the pressure vessel 31 of the mud pumping unit 30;
The pressure vessel extends above the water surface, and the inside of the pressure vessel is opened to the atmosphere or closed by an on-off valve (not shown). The through hole 65 of the floater 60 through which the air vent pipe 64 passes is formed to have a larger diameter than the air vent pipe 64 so as not to interfere with depth adjustment.

Denoted at 66 is a depth adjustment cylinder for adjusting the depth below the water surface at each leg 52, 53 of the front and rear gate frames 50, 51 relative to the floater 60;
1 and the vertical girder 67 and floater 60 provided between
It is installed along the vertical direction between the
The vertical beam 67 is connected to a front cross beam 68 which is attached between the left and right legs 52 and 53 of the front gate frame 50 so that the fixed position in the vertical direction can be changed, and the left and right legs of the rear gate frame 51. 52 and 53 so that the fixed position in the vertical direction can be changed, and then fixed between the cross beam 69 and the depth adjustment cylinder 6
By extending or contracting the rod 6, the front and rear gate-shaped frames 50, 51 are raised and lowered, and the depth of the mud collecting and pumping unit suspended from the front and rear gate-shaped frames 50, 51 can be adjusted. . If the depth cannot be finely adjusted using the depth adjustment cylinder 66, the front and rear crossbeams 68,
By changing the position of the bolt hole 71 of the fixed position adjustment plate 70, both ends of which are fixed by bolts and nuts, a large depth adjustment can be made.

That is, the lengths below the water surface of the legs 52, 53 of the front and rear gate-shaped frames 50, 51 are adjusted in accordance with the excavation depth, and the front opening of the mud excavation and collection unit 10 of the mud collection and pumping unit is adjusted, for example. When dredging a floating mud layer, the floating mud is dredged while moving forward under its own power by driving the traveling device 54 in accordance with the floating mud layer,
The dredged mud is pumped to a remote location. At this time, even if there is a depression in the middle, the buoyancy of the floater 60 prevents the mud collecting and pumping unit from falling, so dredging is carried out at a constant planned depth.

In addition, when dredging mud deposited on the water bottom, first, the first and second excavation angle adjustment cylinders 58,
59 to tilt the mud collection and pressure feeding unit as a whole so that its front end opening side faces diagonally downward, and while it starts digging while self-propelled, the depth adjustment cylinder 66 is slightly driven to remove the mud. Dredging is carried out at a constant depth by pushing down the collecting and pumping unit to dig up the accumulated mud, and then returning the mud collecting and pumping unit to the horizontal position and stopping the driving of the depth adjustment cylinder 66.

Note that, as shown in FIG. 5, the rotary excavation cutter 11' of the mud excavation unit 10 according to this embodiment has one half in the axial direction as a right-handed helical blade, and the other half as a left-handed helical blade. The excavated mud is conveyed so as to be distributed outward in the axial direction, and one half in the axial direction is formed as a conveying screw around the right screw, and the other half is formed as a conveying screw around the left screw. By mud screw 13',
The mud conveyed from both ends of the rotary excavation cutter 11' in the axial direction is collected in the central part in the axial direction, and is collected by a plurality of mud pushing plates 13'a (not shown) attached radially to the central part of the shaft of the mud collecting screw 13'. Mud is forcibly pushed into the pressure vessel 31 of the mud pumping unit 30 through a check valve (corresponding to the first check valve in Fig. 4), and the rotary excavation cutter 11' is used to force the mud into the pressure vessel 31 of the mud pumping unit 30. By distributing the mud to different parts and collecting it again at the center of the shaft by the mud collection screw 13', the excavated mud can be continuously conveyed to the mud pumping unit 30. In addition, rotary excavation cutter 1
As shown in FIG. 6, the spiral blade 11'a of 1' has a blade part 11'b formed at an angle of 90 degrees. The mud is fed into the mud excavation unit 10 by the scraper plate 114 as it moves forward.

In this embodiment, the mud pumping unit is equipped with one pressure vessel 31, but it may be equipped with two pressure vessels as explained in the conventional example shown in FIGS. 3 and 4.

〔Effect of the invention〕

As explained above, according to the present invention, a mud collecting and pumping unit is provided for dredging floating mud, mud, and other mud that forms a layer with a substantially constant thickness on the bottom of a water body with a low water content. Since it can maintain a constant depth and travel on its own, accurate excavation accuracy can be achieved.
Moreover, it has high maneuverability and can dredge even in deep water, resulting in a dramatic improvement in dredging efficiency.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of the dredging device according to the present invention, FIG. 2 is a sectional view from the back side thereof,
FIG. 3 is a plan view of a conventional dredging device, FIG. 4 is a side sectional view thereof, FIG. 5 is a plan view of a mud excavation and mud collection unit, and FIG. 6 is a sectional view thereof. 1: Dredging equipment, 10: Mud excavation mud collection unit, 1
1': Rotary excavation cutter, 13': Sludge collection screw, 20: Sludge pipe, 30: Mud pressure feeding unit,
50, 51: Gate-shaped frame, 52, 53: Legs,
54: Traveling device, 57: Endless track, 58, 59:
Excavation angle adjustment cylinder, 60: floater, 66:
Cylinder for depth adjustment.

Claims (1)

[Claims] 1. A self-propelled means with a gate-shaped frame member fixed in the front and rear so as to straddle a pair of left and right track-type running bodies, and a self-propelled means with a gate-shaped frame member fixed in the front and rear, and a self-propelled means that is attached to the legs of the front and rear frame members so as to be movable in the vertical direction. A floating block and
A position adjustment means is arranged between the left and right pair of track-feeding type traveling bodies to arbitrarily adjust the vertical position of the floating block with respect to the legs, and is arranged to excavate and collect the mud in the front while digging and collecting the mud in the rear. A mud collection and pressure feeding unit that continuously supplies mud into the pressure vessel and pumps the mud stored in the pressure vessel using compressed air through a mud feeding pipe, and a self-propelled mud collection and pressure feeding unit. 1. A self-propelled dredging device characterized by comprising tilting support means supported by the front and rear frame members so as to be tiltable with respect to the direction of movement of the means.