JPH0317970B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an inlet moving device for collecting sludge deposited on the bottom of water such as the sea, lakes, and swamps (hereinafter referred to as sea/lake bottoms).

(Conventional technology) In fish farms where fish farms are set up in the sea and fish are cultivated within areas separated by fish farming nets, the bottom of the water where uneaten food and fish feces settle is often exposed to other water bottoms. Naturally, compared to this, the amount of sludge deposited is significantly greater, contaminating the water quality and causing pollution such as seawater pollution and red tide.

Therefore, in the past, the sludge was collected by diving by an operator.

(Problems to be Solved by the Invention) However, in such sludge collection by workers diving, the collection work is extremely troublesome, the workability is poor, and effective sludge collection is difficult. Therefore, there is a problem in that it cannot be expected to efficiently purify the ocean and lake bottom.

Therefore, it is possible to direct the inlet to the sludge that accumulates on the underside of the fish farming net, inhale the sludge, and collect the sludge on the boat. The question remains as to what to do.

The present invention has been made in view of these problems, and is a method for moving a sludge inlet that does not require large-scale equipment, is therefore highly economical, and can purify the sea lake bed easily and efficiently. The purpose is to provide equipment.

(Means for Solving the Problems) In the sludge inlet moving device according to the present invention, a platform is set at each apex position of a triangular water area that can contain a fish farming net stretched underwater. Strings extend movably forward and backward from the platform, and sludge suction ports are connected to the tips of these strings, which can settle with their own weight into the accumulated sludge at the bottom of the triangular area. The sludge inlet is configured to move three-dimensionally under the water surface of the triangular body of water by cooperative advancement and retreat.

(Function) In the present invention, the sludge inlet is moved three-dimensionally by moving the strings back and forth cooperatively from each of the three platforms. The sludge inlet can be moved all over in response to accumulated sludge on the bottom of the water.

(Example) Fig. 1 is an explanatory front view schematically showing an embodiment of the sludge suction port moving device according to the present invention, and Fig. 2 is a plan view thereof, and in these figures, 1 is a fish farming net; 2A, 2B, 2C are platforms, 3
A, 3B, and 3C represent strings, and 4 represents a sludge inlet.

The fish farming net is stretched in the water with its upper opening opening in the right direction, with buoys 1A attached to the four circumferences of the upper end, and a plurality of weights 1B suspended from the bottom 1a. It is fixed at 5.

The platforms 2A, 2B, and 2C are made of fixed buoys, for example, and are set at respective vertices of a triangular water body (equilateral triangle shown with diagonal lines in FIG. 2) in which the fish farming net 1 can be housed.

The strings 3A, 3B, and 3C are made of ropes, for example, and extend into the triangular water area so as to be movable forward and backward from the platforms 2A, 2B, and 2C. That is,
The strings 2A, 2B, 2C are moved forward and backward manually by workers on the platforms 2A, 2B, 2C, respectively, or by machines such as winches placed on the platforms 2A, 2B, 2C. At the tips of the strings 3A, 3B, and 3C, there is a sludge inlet made of, for example, metal, which sinks under its own weight against the deposition surface 6a of the deposited sludge 6 on the delta sea lake bed 5 and responds in an appropriately oriented posture. 4 is connected.

The tip of a flexible tube 7 is connected to the sludge suction port 4, and the rear end of the flexible tube 7 is connected to, for example, a sludge recovery pump placed on a barge (not shown). The discharge side of the sludge recovery pump is connected to a sludge filtration device (not shown).

Next, the operation will be explained. When the sludge inlet 4 is located at the position shown in FIGS. 1 and 2, that is, at the center (geometric center of gravity) of an equilateral triangular body of water with the platforms 2A, 2B, and 2C as vertices, the accumulated sludge 6 is Corresponding to the deposition surface 6a, therefore, the string 3
In a state where A, 3B, and 3C are on a straight line (median line) extending from each vertex, that is, the platform 2A, 2B, and 2C toward the midpoint of the opposite side, the string 3A is warmed and fed out to move it forward. Arrow in figure 2
X ₁ ) and the strings 3B and 3C are pulled back with equal force (arrows Y ₁ and Y ₂ in FIG. 2), and the sludge suction port 4 is moved from the position P ₀ in FIG.
Move to position P ₁ . On the other hand, while letting out the string 3A from the position _P0 and moving it forward,
The sludge suction port 4 moves to the position _P2 by letting out and moving forward B and pulling and retreating the string 3C. On the other hand, the sludge suction port 4 is moved to the position _P3 by letting out and moving the string 3A forward, letting out and moving the string 3C forward, and pulling and retracting the string 3B. That is, by providing the string 3A with the function of the main feeding forward string, and giving the strings 3B and 3C both the functions of feeding forward and pulling backward, the strings 3A, 3B, and 3C are moved forward and backward in a cooperative manner. The sludge inlet 4 is the accumulation surface 6a of the accumulated sludge 6 in the shaded area indicated by Z ₁ in FIG.
It is moved all over in response to

Similarly, the string body 3B is provided with a function as a main feeding forward string, and the string bodies 3A and 3C are provided with both functions of feeding forward and pulling backward.
By moving A, 3B, and 3C back and forth cooperatively, the sludge suction port 4 is moved all over in correspondence with the deposition surface 6a of the deposited sludge 6 in the shaded water area indicated by _Z2 in FIG. Naturally, by providing the string C with a function as a main feeding forward string, and providing the strings 3A and 3B with both feeding forward and traction/backward functions, and moving each string forward and backward in cooperation with each other, the sludge suction port 4 is moved all over corresponding to the deposition surface 6a of the deposited sludge 6 in the shaded area indicated by _Z3 . Moreover, since the sludge suction port 4 has a weight that causes it to sink under its own weight, it can be made to sink or rise by the cooperation of the strings 3A, 3B, and 3C. That is, since the sludge suction port 4 can be moved three-dimensionally, the sludge suction port 4 can be made to appropriately correspond to the deposition surface 6a.

Therefore, when the sludge recovery pump mentioned above is operated during the movement, the sludge 6 is sucked up from the sludge suction port 4 through the flexible pipe 7 to the sludge recovery pump, and is introduced into the sludge filtration device from here. ,
Water and sludge are separated in the sludge filtration device, the dehydrated sludge is collected as waste in the sludge filtration device, and the filtered water is returned to the sea lake. In other words, the accumulated sludge 6 below the fish farming net 1 can be reliably sucked up and recovered.

In the embodiment described above, the platforms 2A, 2B, and 2C are set at each vertex of an equilateral triangle, and the fish farming net 1 is embedded in the equilateral triangular water area, but the present invention is set only in the embodiment described above. Alternatively, a platform may be set at each vertex position of a triangular body of water such as an isosceles triangle, a scalene triangle, or a right triangle, and the fish farming net 1 may be built inside these triangular bodies of water. It has the same effect as.

(Effects of the Invention) The present invention sets a platform at each apex position of a triangular water area that can contain a fish farming net stretched underwater, and extends a string movably back and forth from each platform. At the same time, a sludge inlet capable of settling under its own weight is connected to the tips of these strings, and the sludge inlet is connected to the sludge inlet at the bottom of the triangular water area by moving forward and backward in cooperation with each of the strings. Since it is configured to move three-dimensionally under the water surface, accumulated sludge can be collected effectively and efficiently in a relatively short period of time, but it does not require large-scale equipment and has the advantage of being extremely economical. have

[Brief explanation of the drawing]

FIG. 1 is an explanatory front view schematically showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a plan view showing a moving area of a sludge suction port. 1... Fish farming net, 2A, 2B, 2C... Platform, 3A, 3B, 3C... String, 4... Sludge inlet, 5... Sea lake bottom, 6... Sedimentary sludge,
6a...Deposition surface.

Claims (1)

[Claims] 1 Platforms are set at each apex position of a triangular water area that can contain a fish farming net stretched underwater, and strings are extended from each platform so that they can move forward and backward, and the tips of these strings A sludge inlet is connected to the sludge that can settle under its own weight to the accumulated sludge at the bottom of the triangular water area, and the sludge inlet moves three-dimensionally under the water surface of the triangular water area by the cooperative advancement and retreat of each string. A moving device for a sludge inlet, characterized in that it is configured as follows.