JP2012228213A - Apparatus for removing marine organism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for removing marine organism, capable of effectively removing such as a jellyfish entered into a fishing net, having excellent operability when used, and capable of performing a crushing process by effectively sucking a large Echizen jellyfish (Nemopilema nomurai) or the like.SOLUTION: The apparatus for removing marine organism provided with a sucking and crushing unit for sucking for crushing the marine organisms such as the jelly fish floating on the sea in a main transport pipe 12 includes a trumpet-shaped suction guide having an opening 16A for introducing the marine organism on the leading end side, and wherein a distal end part on a rear end side is connected to a suction port of the main transport pipe 12, an inner diameter is formed to be gradually narrower from the opening 16A to the distal end part, and an opening angle of the opening 16A is 110°-170°.

Description

  The present invention relates to a marine organism removal apparatus, and more particularly to a removal apparatus used to remove marine organisms such as Echizen jellyfish that have entered a fishing net by stationary net fishing or the like before netting work.

In recent years, there have been many cases where a large amount of jellyfish enter a stationary net due to changes in the state of the sea. Yes. In such a case, many stationary net fishermen have dealt with such things as scooping up jellyfish with tamo nets and removing them from the fishing nets. An effective measure has been desired because the fuel consumed by the fishing boat is enormous due to the heavy load and the fishing boat consumes a lot of time.

  Conventionally, as an apparatus for removing jellyfish that has entered a stationary net, the invention described in Japanese Patent Application Laid-Open No. 2008-296110 (Patent Document 1) is known. A suction crushing pump that suctions and crushes the water and a water flow generator that generates a water flow toward the vicinity of the suction port of the suction crushing pump below the water surface.

8 and 9 are a side view showing an example of a conventional large jellyfish crusher pump and an explanatory view showing a situation in use. A large jellyfish crusher pump 100 shown in FIG. 8 includes a conical plate (suction port) 102 formed in a funnel shape, a pipe-like portion 104, and a suction crushing pump 106 disposed inside the pipe-like portion 104. . When the crusher pump 100 is used, as shown in FIG. 9, the conical plate 102 is submerged downward and the jellyfish is sucked together with seawater, and then crushed by the suction crushing pump 106, and outside the fishing net. To discharge.
Such a crusher pump 100 is also manufactured by Donan Iron Works Co., Ltd. (http://www.donan-tekkou.com/).

JP 2008-296110 A

However, the invention described in Patent Document 1 includes a suction crushing pump and a water flow generating device that generates a water flow below the surface of the water. If the diameter of the jellyfish exceeds 3 to 4 times the inner diameter of the suction port, the suction port is blocked due to its size, and development in which the jellyfish is caught at the suction port frequently occurs. is assumed.

The crusher pump 100 for large jellyfish shown in FIG. 8 and FIG. 9 has a pipe-like portion formed in a pipe shape with a conical plate (suction port) 102 formed in a funnel shape having an inner diameter of about 90 cm at the tip. A suction crushing pump 106 is disposed at the center of the inner side of 104, and four crushing blades 106 </ b> A for cutting jellyfish by the suction crushing pump 106 and drawing seawater to flow backward are provided.

In the crusher pump 100 shown in FIG. 8, the opening angle θ of the conical plate 102 is less than 90 degrees, and the outer appearance is substantially acute, so that the opening end 102A of the conical plate 102, the crushing blade 106A, The distance between will inevitably increase. As a result, when the jellyfish is somewhat separated from the conical plate 102, there has been a problem that a sufficient suction force cannot be applied to the jellyfish. That is, in this crusher pump 100, the inner diameter of the open end of the conical plate 102 is set larger than the umbrella diameter of the jellyfish, and the jellyfish can be smoothly moved unless the distance between the jellyfish and the conical plate is made as short as possible. There were many cases that could not be inhaled.

Furthermore, since the crushing blade 106A for cutting the jellyfish is disposed in the vicinity of the base of the conical plate 102 from the viewpoint of securing the suction force, for example, when the conical plate 102 is removed for maintenance, etc. The blade 106A is exposed, and it is necessary to work with great care from the viewpoint of safety, which is inconvenient in handling. Further, in order to suck in a jellyfish having a large umbrella diameter, the conical plate 102 itself cannot be increased in size. For example, the weight of the conical plate 102 itself may exceed 100 kg, which is disadvantageous in handling during use.

The present invention has been proposed in order to cope with such various circumstances, and can efficiently remove jellyfish and the like that have entered a fishing net. An object is to provide an apparatus.
It is another object of the present invention to provide a marine organism removal apparatus that has excellent suction characteristics and can effectively suck a large Echizen jellyfish or the like to perform a crushing process.

In order to achieve the above object, the invention according to claim 1 is a marine organism removal apparatus provided with suction crushing means in the main transport pipe for sucking and crushing marine organisms such as jellyfish floating in the sea. Has an opening for introducing marine organisms, the rear end is connected to the suction port of the main transport pipe, and the inner diameter gradually decreases from the opening to the end. And a trumpet-shaped suction guide having an opening angle θ of 110 ° to 170 °.

The invention described in claim 2 is characterized in that, in claim 1, the inner diameter D of the opening of the suction guide is 1.5 to 5.0 times the inner diameter d of the end portion.

  According to a third aspect of the present invention, in the first or second aspect, the inner surface of the suction guide is formed as a curved surface.

  According to a fourth aspect of the present invention, in the first or second aspect, the inner surface of the suction guide is formed in a flat shape.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, in the vicinity of the suction port of the main transport pipe on the inner surface of the suction guide, a gentle gradient portion with a gentle inclination angle is chamfered. It is characterized by being formed together.

  A sixth aspect of the present invention is that, in any one of the first to fifth aspects, the crushing blade in the suction crushing means is installed at a position inside the suction port of the main transport pipe. Features.

  The invention according to a seventh aspect is the invention according to any one of the first to sixth aspects, wherein an extension transport pipe is provided at a discharge port of the main transport pipe with respect to the main transport pipe provided with the suction guide and suction crushing means. Each of the three units of the suction guide, the main transport pipe, and the extension transport pipe is detachable.

As described above, according to the invention described in each claim, it is possible to efficiently remove marine organisms such as large Echizen jellyfish that have entered a fishing net such as a stationary net, and operability in transportation and use. Excellent convenience.

It is a side view of the marine organism removal apparatus which concerns on one Embodiment of this invention. Similarly, it is explanatory drawing which shows typically the condition at the time of use of the marine organism removal apparatus which concerns on one Embodiment of this invention. Similarly, it is sectional drawing which shows typically the shape of the suction guide which is the principal part of the marine organism removal apparatus which concerns on one Embodiment of this invention. Similarly, it is a side view showing a specific shape of a suction guide which is a main part of the marine organism removal device according to an embodiment of the present invention. Similarly, it is a graph which shows the result of having measured the suction flow velocity on the central axis of the opening part of the suction guide which is the principal part of the marine organism removal apparatus which concerns on one Embodiment of this invention. Similarly, it is explanatory drawing seen from the side surface about the use condition in the sea of the marine organism removal apparatus which concerns on one Embodiment of this invention. Similarly, it is a schematic perspective view showing a state in the vicinity of the suction guide during the removal work by the marine organism removal device according to one embodiment of the present invention. It is a side view of the conventional crusher pump for large jellyfishes. It is explanatory drawing of the use condition of the conventional large jellyfish crusher pump.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a marine organism removing apparatus according to the invention will be described with reference to the accompanying drawings.
FIG. 1 is a side view of a marine organism removal apparatus according to an embodiment of the present invention, and FIG. 2 is an explanatory view schematically showing a situation during use of the marine organism removal apparatus according to the present embodiment.
As shown in FIG. 1, the marine organism removal apparatus 10 according to the present embodiment includes a main transport pipe 12, an extension transport pipe 13, a hydraulic motor 14 </ b> A as suction crushing means, and a suction guide 16. It is said.

The main transport pipe 12 has a pipe shape, and a flange 12A for attaching a suction guide 16 (to be described later) to the suction port and a flange 12B for attaching the extension transport pipe 13 to the discharge port are provided. A flexible pipe 13A is connected to the extension transport pipe 13 on the rear side. Each of the three units including the main transport pipe 12, the extension transport pipe 13, and the suction guide 16 is configured to be detachable, and the size of the jellyfish to be removed is appropriately determined depending on the application. , Units of different lengths can be used in combination.

The main transport pipe 12 is provided with a hydraulic motor 14A as a suction crushing means 14, and this hydraulic motor 14A is axially connected to a suction side impeller (crushing blade) 18 via a transmission shaft 14B inside the main transport pipe 12. Thus, the impeller 18 is driven to rotate. The impeller 18 is provided at a position slightly inward of the flange 12A serving as the suction port of the main transport pipe 12, and does not protrude from the end surface of the suction port of the main transport pipe 12, and is unnecessary during removal work. It prevents the entrainment of objects and improves safety. The suction crushing means 14 is not limited to this, and it is also possible to use another driving device having a suction force and a crushing force.

As shown in FIG. 2, the hydraulic motor 14A is rotationally driven by hydraulic pressure of hydraulic oil supplied from a hydraulic pump 54 that uses the power of the engine 52 of the ship 50 via a pipeline, various control valves, and the like. The impeller 18 is rotated via the shaft 14B. The rotation direction of the impeller 18 is a direction in which a suction force is applied in the sea.

FIG. 3 is a cross-sectional view schematically showing the shape of the suction guide 16, and FIG. 4 is a side view showing the specific shape of the suction guide 16.
As shown in FIG. 3, the suction guide 16 in the present embodiment is formed so that its opening angle θa = 110 ° to θb = 170 °.

Further, the suction guide 16Y shown in FIG. 4A is formed in a streamline shape having a substantially elliptical curved surface whose inner surface is convex, and the suction guide 16Z shown in FIG. Are formed flat so that no protrusions or corners are present inside the suction guides 16, 16Y, 16Z.
In particular, on the inner surface of the suction guide 16Z shown in FIG. 4B, a gentle slope portion 16C having a different slope is formed in the vicinity of the connection portion with the main transport pipe 12, and the chamfered portion 16E is formed at the joint portion 16D. Is formed, and the shape of the inner surface is gentle toward the portion connected to the suction port 12C. As a result, it is possible to more reliably prevent the occurrence of contraction in the vicinity of the suction port 12C.

Thus, in the present embodiment, the suction guide 16 having an opening angle of the opening 16A in the range of 110 ° to 170 ° is connected to the front of the main transport pipe 12. This also leads to shortening the distance L between the suction port 12C and the end of the opening 16A, and as a result, the suction force in the vicinity of the opening 16A can be maintained above a certain level. . With these configurations, it is possible to prevent the suction force from decreasing, and even when D has a suction guide opening diameter smaller than the jellyfish umbrella diameter, the flow when sucking the jellyfish with the inner surface of the suction guide 16 streamlined. Since the resistance is reduced, large jellyfish can be efficiently sucked into the main transport pipe 12. Thereby, in the main transport pipe 12, the jellyfish can be crushed by the impeller 18 and quickly discharged to the outside of the fishing net 60.

  The suction guide 16 is generally made of stainless steel, FRP, or the like having excellent corrosion resistance. As described above, the inner surface is formed into a flat or curved streamline so that no protrusions are present. Is formed. As a result, the protruding portion of the inner surface that causes the trapping when the large jellyfish is sucked can be completely eliminated, and the large jellyfish having an umbrella diameter about 6 times the inner diameter d of the suction port 12C of the main transport pipe 12 can also be obtained. It can be easily sucked, crushed and discharged to a disposal site. In addition, it is possible to further reduce the frictional force at the time of suction by applying friction reduction processing such as fluorine treatment processing to the inner surface of the suction guide 16.

Next, the reason why the opening angle of the opening 16A in the suction guide 16 is in the range of 110 ° to 170 ° will be described based on the graph of FIG.
The graph of FIG. 5 shows the result of measuring the suction flow velocity on the central axis of the opening 16A while changing the opening angle of the suction guide from 90 ° to 170 °, and the horizontal axis shows the opening angle of the suction guide 16. The experimental results are plotted with θ and the vertical axis as the flow rate ratio (d / D) at the center of the opening 16A of the suction guide 16 and the center of the suction port 12C of the main transport pipe 12.

In FIG. 3, the inner diameter of the suction port 12C of the main transport pipe 12 is d (= the inner diameter of the end portion 16B in the suction guide 16), and the inner diameter of the opening portion 16A of the suction guide 16 is D. As shown in FIG. 5, when D (D / d = 3 to 5), when the opening angle θ of the suction guide 16 is less than 110 ° (in short, an acute angle), the suction guide 16 opens from the suction port 12C. As a result of the distance between the end portion of the portion 16A becoming far, the performance of drawing the jellyfish floating near the end portion of the opening portion 16A into the main transport pipe 12 is extremely deteriorated when the flow rate ratio is around 0.1. This can be understood from the graph of FIG.

Further, when the opening angle θ of the opening portion 16A of the suction guide 16 becomes 170 ° to 180 °, the distance from the main transport pipe 12 to the end portion of the opening portion 16A becomes closer, and the suction flow velocity increases, but the suction port 12C. Since the contracted flow at the (suction guide end portion 16B) increases, the apparent cross-sectional area of this portion decreases, and sometimes clogging occurs at the joint between the suction guide end portion 16B and the suction port 12C. .
For this reason, it can be understood that it is appropriate to set the opening angle of the opening 16A in the suction guide 16 in the range of 110 ° to 170 ° in order to remove jellyfish having a large suction efficiency and a large umbrella diameter.

Furthermore, the inner diameter D of the opening portion 16A of the suction guide 16 in this embodiment is 1.5 to 5.0 times the inner diameter d of the main transport pipe 12, for the following reason.
First, the ratio of 1.5 is not reduced without reducing the suction force in front of the suction guide 16, and even a jellyfish having an umbrella diameter larger than the opening 16A of the suction guide 16 is not caught by the opening 16A. The smallest inner diameter to maintain stable suction. In addition, the amount of seawater that flows forward from behind the opening 16A of the suction guide 16 is suppressed, and the suction force in the axial direction of the suction guide 16 is improved at the same time.

On the other hand, 5.0 times is set because the jellyfish in front of the suction guide 16 can be easily sucked even when the umbrella diameter of the large jellyfish is larger than the inner diameter of the opening 16A, and the removal device 10 is transported during the work. -The inner diameter is the limit that enables efficient handling in terms of weight and size when performing various operations such as movement.
In addition, the inner surface of the suction guide 16 is formed in a streamlined shape that is flat or curved and completely eliminates the protruding portion that causes catching when sucking in a large jellyfish, so that a natural streamline is obtained. By sucking sideways at a depth of 1 to 3 m, jellyfish with an umbrella diameter of about 5 times the inner diameter of the suction port 12C can be easily sucked and crushed and discharged to a disposal site.

As described above, when the opening angle of the opening portion 16A of the suction guide 16 is less than 110 ° when the inner diameter D of the opening portion 16A is constant, the opening portion 16A from the suction port 12C of the main transport pipe 12 is used. The suction efficiency decreases as the distance to the open end increases, and even if the jellyfish is located on the central axis, the suction force cannot be fully applied, and the probability of sucking the jellyfish is greatly reduced. To do. Accordingly, as a condition that the contraction flow does not occur at the suction port 12C, it is first required that the apparent distance from the suction port 12C to the open end of the suction guide 16 is short without reducing the apparent inner diameter of the suction port 12C. Furthermore, reducing the flow resistance during suction while maintaining the suction force high is a necessary condition for setting the dimensions of the suction guide 16 and the like.

Specifically, the suction guide 16 has a trumpet shape in which the opening angle of the opening 16A is 110 ° to 170 °, and the inner diameter of the opening 16A is 1.5 to 5.0 times the inner diameter d of the end portion 16B. By making it become, it can prevent the fall of suction power. Preferably, the contraction flow is suppressed, and as can be understood from the graph of FIG. 5, the opening angle of the opening 16A is 120 ° to 160 °, and the inner diameter D of the opening 16A is 1. If it is 5 to 4.0 times, the suction force can be more reliably maintained.

Next, a description will be given of a verification result when a jellyfish removal operation is performed using the marine organism removal apparatus 10 of the present embodiment configured as described above.
FIG. 6 is an explanatory diagram viewed from the side of the state of use of the marine organism removal apparatus 10 according to the present embodiment from the side, and FIG. 7 is a schematic perspective view showing a state in the vicinity of the suction guide 16 during the removal operation.

As shown in FIGS. 2, 6, and 7, the marine organism removal apparatus 10 is used while being suspended from a ship 50 by an auxiliary rope 56, a crane 58 on the deck, and the like. 12. The removal operation is performed at a depth of 1 to 3 m so that the extension transport pipe 13, the suction guide 16 and the like are substantially parallel to the seawater surface XX.
In the experiment, the suction guide 16 installed in the removing device 10 has an opening angle of 150 °, the diameter of the opening 16A is 1,000 mm, and the inner diameter of the end 16B connected to the main transport pipe 12 is 300 mm. .

  The preparatory work is extended to move the removal device 10 to the side of the jellyfish floating on the sea surface with the crane 58 of the ship 50 and to discharge the sucked and crushed jellyfish out of the fishing net (stationary net) 60. The positions of the transport pipe 13 and the flexible pipe 13A are determined and fixed to the fishing net 60. And after raising a fixed net in stationary net fishing, the fish is located from the center to the bottom in the fishing net 60, while the jellyfish has a property of floating near the water surface, so that only the jellyfish can be selectively sucked. . As a result, the fish in the fishing net 60 is not sacrificed.

During the removal operation, the position of the removal device 10 is appropriately adjusted by the auxiliary rope 56 and the crane 58, the opening 16A of the suction guide 16 is brought close to the jellyfish floating on the sea surface, and the inside of the main transport pipe 12 is drawn by the suction force of the impeller 18. The operation of crushing while sucking and discharging from the extension transport pipe 13 to the outside of the fishing net 60 is repeated.
In addition, the removing device 10 can be placed on the side of the ship 50 to perform the removing operation, or the removing device 10 can be installed under the float floating in the sea to perform the removing operation.

As described above, when the jellyfish in the fishing net 60 is discharged, when the flow rate of seawater by the impeller 18 in the main transport pipe 12 is set to 18 (m ³ ) per minute, It was confirmed that the working time can be shortened from one fifth to one tenth compared with the method of removing out of the container. That is, it is possible to prevent the fishing net 60 from being damaged by jellyfish while reducing the labor and time required for the work, and the fuel consumed by the fishing boat can also be reduced at the same time.

Further, since the marine organism removal apparatus 10 of the present embodiment is composed of at least three units of the main transport pipe 12, the extension transport pipe 13, and the suction guide 16, handling such as movement is easy, and The combination is optimized, for example, by appropriately setting the diameter and opening angle θ of the opening 16A of the suction guide 16 and the length of the extension transport pipe 13 according to the size and generation amount of the jellyfish, the size of the fishing net 60, etc. Is possible.

As described above, according to the marine organism removal apparatus 10 of the present embodiment, the suction force can be maintained high, and a large jellyfish can be sucked even if the main transport pipe 12 and the suction guide 16 are downsized. Since crushing can be performed, jellyfish that adversely affect the fishery can be processed in a short time and with less labor.

As described above, according to the present invention, it is possible to easily remove jellyfish and the like in a short time, and it is possible to reduce the work load on fishermen during stationary net fishing.

10 Marine life removal equipment
12 Main transport pipe
12A 12B Flange
12C inlet
13 Transport pipe for extension
13A Flexible pipe
14 Suction crushing means
14A Hydraulic motor
14B Transmission shaft
16 16Y 16Z Suction guide
16A opening
16B end
16C gentle slope
16D joint
16E Chamfer
18 Impeller (crushing blade)
50 ships
52 engine
54 Hydraulic pump
56 Auxiliary rope
58 crane
60 fishing net

Claims (7)

In a marine organism removal apparatus in which a suction crushing means for sucking and crushing marine organisms such as jellyfish floating in the sea is provided in the main transport pipe,
A shape having an opening for introducing marine organisms on the front end side, the end on the rear end side being connected to the suction port of the main transport pipe, and the inner diameter gradually becoming narrower from the opening to the end A marine organism removing apparatus, comprising a trumpet-shaped suction guide formed at an opening angle of 110 ° to 170 °. The marine organism removal apparatus according to claim 1, wherein an inner diameter D of the opening portion of the suction guide is 1.5 to 5.0 times larger than an inner diameter d of the end portion.   The marine organism removal apparatus according to claim 1 or 2, wherein an inner surface of the suction guide is formed as a curved surface. The marine organism removal apparatus according to claim 1 or 2, wherein an inner surface of the suction guide is formed in a flat shape. 5. The method according to claim 1, wherein a gentle slope portion with a slanting angle is formed together with a chamfered portion in the vicinity of the suction port of the main transport pipe on the inner surface of the suction guide. The marine organism removal apparatus as described in a term. The marine organism removal according to any one of claims 1 to 5, wherein the crushing blades in the suction crushing means are installed at a position inside the suction port of the main transport pipe. apparatus.   An extension transport pipe can be connected to the discharge port of the main transport pipe with respect to the main transport pipe provided with the suction guide and suction crushing means. These suction guide, main transport pipe, and extension transport pipe Each unit is detachable, The marine organism removal apparatus of any one of Claims 1-6 characterized by the above-mentioned.

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