JPH0143094B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for collecting sludge from the bottom of the water, which can uniformly collect sludge from the bottom of the water, and also allows the sludge under the net to be collected, for example, in an aquaculture fishing area, while leaving the net as it is.

(Conventional sludge collection method) Conventionally, sludge from the bottom of the water was collected as follows.

In other words, a suction bucket is suspended from a work boat and placed on the bottom of the water to suck up the sludge from that area. When collecting sludge over a wide area, the suction bucket is raised and the work boat is moved.
It was necessary to repeat the process of placing the suction bucket on the bottom of the water at the moved position.

For this reason, this conventional collection method has the disadvantage that the sludge collection locations are not uniform and some portions are left behind.

In addition, for example, in aquaculture fishing areas where nets have been set up, the nets cannot be removed, so there is also the drawback that the sludge under the nets cannot be collected.

(Objective of the present invention) This invention enables the uniform collection of sludge in a predetermined area without having to move a work boat each time, and even if a net is stretched around the area, it can be collected without removing the net. The purpose is to provide a method for collecting sludge from the bottom of the water that can collect sludge from the bottom.

(Embodiment of the present invention) In this embodiment, a plurality of columns 1 are erected on the bottom of the water where sludge is to be collected, and a predetermined work frame X is assembled in advance.
A plurality of extraction prevention mechanisms R are provided.

As shown in FIGS. 2 to 4, this pull-out prevention mechanism R includes an air cylinder (not shown) provided in the cylindrical portion 2, and a connecting rod 4 connected to the piston rod 3 of the air cylinder. are doing.

A bracket 5 is provided on the inner surface of the cylindrical portion 2.
is provided, and the center portion of a dogleg-shaped link 6 is rotatably attached to this bracket 5. moreover,
One end of this link 6 is rotatably attached to the connecting rod 4, and the other end of this link 6 is attached to the connecting rod 4.
The protruding plate 7 is attached.

The protruding plate 7 attached to the other end of the link 6 is slidable in a hole 8 formed in the cylindrical portion 2. A pair of guide plates 9 and 10 are provided on the outer periphery of the cylindrical portion 2 above and below the hole 8. Together, the guide plates 9 and 10 have a chevron-shaped side surface, and a distance is maintained between them that allows the protruding plate 7 to pass through.

Therefore, when this cylindrical portion 2 is buried in the bottom of the water and the cylinder is driven to raise the connecting rod 4, the link 6 is rotated to cause the protruding plate 7 to protrude outward from the cylindrical portion 2. If the protruding plate 7 protrudes outward from the cylindrical portion 2 in this manner, the protruding plate 7 sinks into the bottom of the water, so that the support 1 cannot be easily removed.

On the other hand, when removing the pillar from the above condition,
The cylinder is driven to lower the connecting rod 4. When the connecting rod 4 is lowered, the link 6 returns to the state shown in FIG. 2, and the protruding plate 7 is housed in the cylindrical portion 2, so that it can easily pass through the support column.

Further, a sharpened member 11 is attached to the lower end of the cylindrical portion 2 in which the extraction prevention mechanism R is installed. As is clear from FIG. 4, this sharpened member 11 has the following features:
A keyhole 12 is formed and a bolt 13 is tightened into the keyhole 12 to removably fix it to the cylindrical portion 2.

The reason why the sharpened member 11 is made removable in this manner is to enable maintenance of the extraction prevention mechanism R within the cylindrical portion 2.

At least six such supports 1 are prepared and arranged in two rows, three in each row, as shown in FIG. However, in this embodiment, nine pillars 1 are prepared and arranged in three rows.

A pipe-shaped rail 14 is spanned between the lower parts of the columns 1 in the column direction, and
Support members 15 are provided at required locations on this rail 14. A pipe 16 also spans between the outermost supports 1 of each row, and a guide member 18 for a suction hose 17 is movably provided on this pipe 16.

A traveling device S is installed between the pair of rails 14 as described above, and this traveling device S is
Self-propelled mechanisms, which will be described later, are provided on both sides of the traveling body 19, which maintains a length extending between the rails 14.

The traveling body 19 is hollow inside to form an air chamber 20 (see FIG. 7), thereby giving the traveling body 19 itself buoyancy. The reason why the traveling body 19 itself is given buoyancy is to reduce the load acting on the rail 14 and to ensure that the rail 19 has a sufficient span.

Rollers 21 and 22 that contact the upper and side surfaces of the rail 14 are provided on the lower side surfaces of both ends of the traveling body 19 which has been given buoyancy in this manner.

However, as shown in FIG. 9, one of the rollers 21 has a long hole 24 formed in its holding plate 23, so that the roller 21 can move in the longitudinal direction of the traveling body 19. The reason why the rollers 22 are made movable in this way is because assembling the work frame X involves underwater work, so it is difficult to accurately set the distance between the pair of rails 14.

In addition, in this embodiment, since the six columns 1 are arranged in two rows as described above, the traveling section of the traveling device S is divided into two with the middle column as the border. A traveling device S is mounted on each of the divided travel sections. In other words, a work frame X assembled using six columns is equipped with two traveling devices S.

On the upper surface of both ends of the traveling body 19 as described above,
Although a pair of winding drums 25 to 28 are provided,
These winding drums have their rotating shafts connected to the traveling body 19.
parallel to the longitudinal direction.

Then, the wire 29~ is attached to these winding drums.
32, the wires of the pair of winding drums 25 and 26, 27 and 28 are pulled out in opposite directions, and their tips are fixed to the support 1 facing the drums.

Further, an air motor 33 is provided on the side of the pair of winding drums 25 and 26, and this air motor 33 has a pair of sprockets 35 and 36 provided on its drive shaft 34. Endless chains 37, 38 wound around the sprockets 35, 36 are wound around sprockets 39, 40 provided on the pair of winding drums 25, 26, respectively.

Further, a rotary shaft 61 is connected to the drive shaft 34 of the air motor 33 on the opposite side to the side where the sprockets 35 and 36 are provided, and the sprocket 41 and
42 are provided.

In addition, the reference numeral 43 in the figure indicates the rotating shaft 61.
It is fixed to the upper surface of the traveling body 19 with a bearing for holding it.

As described above, the sprockets 41 and 42 provided on the rotating shaft 61 have endless chains 44 and 45.
Wrap around these endless chains 44, 45,
It is wound around the sprockets 46, 47 of the winding drums 27, 28 corresponding to the tips of the rotating shaft 61.

Therefore, when the air motor 33 is rotated now, the pair of winding drums 25 and 26, 27 and 2
8 rotate in opposite directions. That is, one winding drum rotates in a direction to wind the wire, and the other winding drum rotates in a direction to unwind the wire.

When the winding drum rotates as described above, the traveling body 19 travels in the wire winding direction.

As is clear from this, the winding drums 25 to 28 and the air motor 33 are the main elements and constitute the self-propelled mechanism.

In this way, the traveling device S equipped with a self-propelled mechanism has
A suction bucket mechanism T equipped with a traveling mechanism is provided, and the configuration of this suction bucket mechanism T is as follows.

That is, as is clear from FIGS. 7 and 8, this suction bucket mechanism T is provided with a roller 49 on its traveling frame 48.
are brought into contact with the top and side surfaces of the traveling body 19 and are movable along the traveling body 19.

The traveling frame 48 is provided with a pair of air cylinders 50, and the tips of the piston rods 51 of these air cylinders 50 are
A connecting member 52 is provided. Biston rod 51
A bolt 53 is provided on this connecting member 52 provided at the tip, and this bolt 53 is inserted into a long hole 56 of a support piece 55 provided on a suction bucket 54. Further, a compression spring 57 is interposed between the traveling frame 48 and the suction bucket 54.

Due to the action of the compression spring 57, a downward force is always applied to the suction bucket 54. Since a downward force is acting on the suction bucket 54 in this way, the bolt 53 comes into contact with the upper end of the normal elongated hole 56.

Therefore, if the air cylinder 50 is contracted in the above state where the bolt 53 is in contact with the elongated hole 56, the suction bucket 54 will rise against the compression spring 57.

The suction bucket mechanism T moves along the traveling body 19, and its driving mechanism mainly includes an air motor 58 and a winding drum 59 provided on one side of the traveling body 19, that is, on the left side of FIG. It's natural.

That is, a sprocket 62 is provided on the drive shaft 60 of the air motor 58, and this sprocket 62
An endless chain 63 is wound around a sprocket 64 provided on the winding drum 59.

Therefore, when the air motor 58 is driven, the winding drum 59 rotates.

A wire 65 is wound around the winding drum 59 that rotates in this manner. Both ends of this wire 65 are pulled out from the winding drum 59, and one end thereof is directly connected to the traveling frame 48. Further, the other end of this wire 65 once passes through the traveling frame 48 and then passes through the traveling body 19.
The wire is wound around a pulley 66 provided at the other end of the wire and made a U-turn, and the other end of the U-turn is connected to the traveling frame 48 from the side opposite to the one end of the wire.

Therefore, the winding drum 5 is
9 rotates, the suction bucket mechanism T travels along the traveling body 19 either to the left or right depending on the direction of rotation.

The suction hose 17 described above is connected to the suction bucket 54, and the sludge sucked by the suction bucket 54 is sucked up to a work boat or land via the suction hose 17.

Note that if the suction bucket 54 is provided with a function of stirring the sludge, the suction effect will be further improved. A structure for stirring sludge has already been provided by the present applicant in Utility Application No. 163151/1983 (Patent Application No. 86610/1983).

In addition to assembling the work frame
7, and a control valve 68 for controlling each of the air motors and air cylinders.

Therefore, at the aquaculture fishing ground where the net 71 is set, the work frame X is assembled so that the rail 14 is located below the net 71.

As shown in FIG. 1, two traveling devices S are spanned between the pair of rails 14 of the work frame X assembled in this way, and they are positioned on opposite sides.

When the traveling device S is stretched over the rail 14 in this manner, the suction bucket 54 comes into close contact with the bottom of the water. This suction bucket mechanism T includes a compression spring 57.
Since this is provided, even if the bottom of the water is uneven, the suction bucket 54 can be tilted along the bottom of the water. From this state, while stirring the sludge in the area covered by the suction bucket 54, a suction pump (not shown) is driven to suck the sludge.

When the sludge collection process at this location is completed, the air cylinder 50 is driven to slightly raise the suction bucket 54, while the air motor 58 is driven to rotate the winding drum 59, and the suction bucket mechanism T is moved to the traveling body. Move it a little along 19.

During this movement process, if the suction bucket 54 hits an obstacle at the bottom of the water and becomes unable to move, the air cylinder 50 of the suction bucket mechanism T
further contract. When the air cylinder 50 is contracted, the suction bucket 54 further rises against the compression spring 57, so that the above-mentioned obstacle can be overcome.

Once the suction bucket mechanism T has finished running on the traveling body 19 as described above, the air motor 33 is driven to rotate the winding drums 25 to 28 in a predetermined direction, and the traveling device S is moved along the rail 14.

Then, the suction bucket mechanism T is moved again along the traveling body 19 from the above-mentioned moving position of the traveling device S, and the same sludge collection work as described above is performed.

In this way, when the above-mentioned collection work by one of the two traveling devices S is completed, the sludge collecting work by the other traveling device S is started. At this time, one of the traveling devices S removes it from the rail 14 and removes it from the rail 14 of the second row.
Pass it between.

Further, when the collecting work by the other traveling device S is completed, the other traveling device S is passed between the rails 14 in the second row, and the collecting work by one traveling device S is started.

During this time, the columns 1 and rails 14 located on the outside of the first row are removed and assembled on the outside of the rails 14 on the second row.

In this way, sludge of a desired area can be continuously collected.

Further, as described above, since the inside of the traveling body 19 is made hollow to form the air chamber 20, the load acting on the rail 14 is reduced due to its buoyancy. Since the load acting on the rail 14 is reduced in this way, the span of the rail can be increased, and the traveling length of the traveling device S can be increased accordingly. Therefore, the area for collecting sludge by assembling the work frame X at one time can be increased.

As described above, the suction bucket mechanism T is provided with the air cylinder 50 to avoid obstacles at the bottom of the water.
8 may be provided with a sensor such as an ultrasonic wave to detect obstacles on the bottom of the water, and the air cylinder 50 may be driven in conjunction with the sensor.

Furthermore, in this embodiment, a scale 69 for confirming the movement position of the traveling device S is provided. The moving position confirmation scale 69 has an indicator 70 that moves up and down in accordance with the moving position of the traveling device S, and the moving position of the traveling device S can be confirmed by the up and down position.

(Structure of the present invention) The structure of the present invention is such that a work frame having at least a pair of rails installed close to the bottom of the water is assembled underwater, and a traveling body of a traveling device having a self-propelling function is installed between the rails. The traveling body is equipped with a suction bucket mechanism that can move along it, and the movements of the traveling body and the suction bucket mechanism combine to move the suction bucket mechanism vertically and horizontally to reach the bottom of the water. The feature is that sludge is collected.

With this configuration, sludge can be collected in a portion corresponding to the movement locus of the suction bucket mechanism.

(Effects of the Present Invention) According to the method for collecting water bottom sludge of the present invention, configured as described above, sludge can be uniformly collected in an area corresponding to between the rails of the work frame.

Furthermore, even in cases where the net cannot be removed, such as in aquaculture fishing grounds, the sludge beneath the net can be easily collected.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of the assembled work frame, Fig. 2 is a vertical cross-sectional view of the extraction prevention mechanism provided at the lower end of the column, and Fig. 3 is the same. 4 is an enlarged side view of the connecting portion between the cylindrical portion and the pointed portion of the extraction prevention mechanism, FIG. 5 is a plan view of the traveling device, FIG. 6 is a front view, and FIG. 7 is a cross-sectional view. A front view of the suction bucket mechanism, FIG. 8 is a side view, and FIG. 9 is a bottom side view of one end of the traveling body.
Figure 0 is a side view of the traveling body. X... Work frame, 14... Rail, S... Traveling device, 19... Traveling body, T... Suction bucket mechanism.

Claims (1)

[Claims] 1 Assemble a work frame underwater, erect at least one pair of rails provided on this work frame close to the bottom of the water, and span the traveling body of a traveling device with a self-propelled function between the pair of rails. ,
This traveling body is provided with a suction bucket mechanism that is movable along the traveling body, and the sludge at the bottom of the water is collected while moving the traveling body and the suction bucket mechanism.