JP2822163B2 - Eelgrass sampling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for collecting eelgrass grown in a field or naturally growing eelgrass for transplanting to a newly constructed seabed near a coast or a seabed where plants have disappeared. It concerns machines. Eelgrass
It grows thick with rhizomes and roots on the sandy mud seabed at a depth of 0 to 10 m in the coastal area around the inner bay in each place. The place where the eelgrass alone or the eelgrass and other plants are mixed to form a community is generally called an eelgrass ground, which is not only used as a spawning ground for fish and shellfish, but also used as a seabed. Prevents the movement of sand and helps to conserve the beach, absorbs nutrients from seawater and the seabed, and promotes sedimentation of suspended solids, which helps to purify the environment. For this reason, eelgrass is transplanted to eelgrass beds on the newly built coastal seabed due to the increase in landfill construction in recent years and on the coastal seabed where seabed plants have disappeared due to water pollution at the time, and purification and preservation of the coastal environment is carried out. Attempts have been made to further improve fishery productivity.
The present invention relates to a machine for efficiently collecting eelgrass, which is required for such an urgent need for growing eelgrass grounds.

[0002]

2. Description of the Related Art Conventionally, if the growing eelgrass is directly pulled out, the root may be damaged, the root may be cut off, or the rhizome may be damaged. Digging the soil may damage the roots and rhizomes, so eelgrass grown in fields,
When collecting eelgrass that grow naturally, it is a cumbersome task to manually remove them from the mainland, and a large-scale environment that affects the environment, such as collecting a large amount of seabed soil using a dredger etc. Work was needed.

[0003]

The problem to be solved by the present invention is to reduce the amount of eelgrass grown in a field or the like and the eelgrass that naturally grows, which have been manually performed, in an adverse effect on the environment. It is to develop a machine to perform efficiently without giving.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted various studies to solve the above-mentioned problems. As a result, the high-pressure water flow is used to fluidize the sandy soil on the seabed near the eelgrass. It was found that eelgrass can be suspended in water, and the eelgrass extractor according to the present invention was completed. An eelgrass extractor according to the present invention comprises a gantry which can be installed on the seabed, and two or more fountain pipes provided on the gantry such that the tip protrudes below the grounding surface of the gantry, and having fountain holes in the tip and lower peripheral wall. And an eelgrass extractor (hereinafter referred to as "first invention") comprising a piping system for supplying a high-pressure water flow to the fountain pipe, a gantry capable of moving on the seabed by external force or by itself, and the gantry And two or more fountain pipes having fountain holes at the tip and lower peripheral wall, and a piping system for supplying high-pressure water to the fountain pipes. An eelgrass collecting machine (hereinafter referred to as "second invention"), and a gantry capable of moving on the seabed by external force or by itself, and a horizontal and horizontal plane below the ground contact surface of the gantry. Provided on the tube wall as appropriate Fountain tube having a fountain hole drilled in, and consists of eelgrass class harvester, characterized in that it consists of a pipe system for supplying high-pressure water (hereinafter referred to as "third invention") in the fountain pipe.

[0005] The eelgrass sampling machine according to the first invention comprises a gantry, a fountain tube and a piping system. The mount may be of any type as long as it can be installed on the sandy area where eelgrass is growing. Usually, the gantry is composed of about four legs and a frame for holding a fountain tube and a piping system. Further, the piping system may be of any type as long as it can evenly distribute and supply the high-pressure water flow to the fountain pipe. Usually, the piping system is composed of a water receiving port for receiving a high-pressure water flow sent from a ship or onshore with a pressure-resistant hose, and a water distribution pipe for dividing the received high-pressure water flow into each vertical fountain pipe.

The fountain pipe has an upper end connected to a water distribution pipe, a fountain hole formed in a central portion at a lower end and a lower peripheral wall, and protrudes 15 to 60 cm downward from a grounding surface of the gantry. The fountain hole in the peripheral wall of the fountain pipe is generally 30 to 45 in the circumferential direction.
It is provided at a uniform angle at an angular interval of degrees and at an interval of 3 to 10 cm in the longitudinal direction, at substantially equal intervals, but it is not necessarily required that the density be uniform, but rather, the tip The part is preferably higher in density than the upper part. In addition, the size of the fountain hole may be any size and any shape as long as the flow velocity and the flow rate necessary to fluidize the sandy soil of the seabed can be obtained. .
Generally, the fountain holes are circular having a diameter of 2 to 6 mm. The cross-sectional shape of the fountain tube is preferably a circular shape in consideration of availability, price, and the like. Also, the number of fountain pipes is at least two, because the most efficient fluidization of the sandy bottom on the sea floor by the jet water flow occurs between the two fountain pipes. If the number is three or more, the efficiency is further improved, but if the number is large, the machine becomes too large and it is impossible to make a small turn, so that at most 12 lines / row × 12 rows in total 1
Up to about 44. The interval between the fountain pipes depends on the ridge width of the grown eelgrass, but is usually 10 to 30 c.
m.

[0007] In the eelgrass sampling machine according to the second invention, the gantry can move on the seabed of the sandy ground by external force or by itself. To move by external force means to move the towed boat or to push it by hand with a sled or the like provided at the lower end of the legs of the gantry. It is to be loaded on a rail car and moved. Since the fountain pipe moves with the tip being sunk into the seabed with the movement of the gantry, the fountain pipe is provided so as to protrude downward and obliquely forward at an arbitrary inclination angle.
This inclination angle is in the range of 30 to 90 degrees downward with respect to the traveling direction, and the length of projecting the oblique fountain pipe from the grounding surface of the gantry is in the range of 15 to 60 cm, and the vertical direction from the bottom surface. To a depth of 15 to 30 cm. The angle and the length are changed according to the soil of the eelgrass growing area and the degree of growth of the eelgrass, and can be fixed to the gantry. Also, the cross-sectional shape of the fountain tube is preferably a circular shape in consideration of availability, price, etc.
In consideration of reducing the resistance when moving through the fluidized sandy soil, an elliptical shape with the longitudinal axis extending back and forth is more preferable. Further, the density of the fountain holes at the lower part of the peripheral wall may be uniform, but it is more preferable that only the front part is provided. In addition, the adjustment of the inclination angle and the like can be performed underwater, or may be performed by remote control from a ship or on the ground. However, such an expensive and complicated mechanism is not necessarily required, and the adjustment on the ship or the ground may be performed. A simple mechanism that can be re-attached when pulled up may be used. Further, in the piping system, it is preferable to use a flexible pressure-resistant hose for connection with the fountain tube in order to easily adjust the inclination angle and the length of the fountain tube. Further, it is preferable that the number of fountain pipes is appropriately changed according to the supply capacity and the work area of the high-pressure water flow that can efficiently fluidize the sandy ground. Further, in a machine that moves by itself, a pump may be operated by using the power of the machine, and the surrounding seawater may be sucked and supplied to the water distribution pipe as a high-pressure water flow.

[0008] The eelgrass extractor according to the third invention comprises a second eelgrass.
A fountain tube protrudes below a ground contact surface of the gantry and is provided horizontally and horizontally with respect to the traveling direction on a gantry capable of moving on the seabed by external force or by itself as in the invention. Usually, the length of the fountain tube projecting from the grounding surface of the gantry is 15 to 60 cm. Further, the fountain holes provided on the pipe wall may be provided uniformly, but are preferably provided only on the front surface and the upper surface. The cross-sectional shape of the fountain pipe is preferably circular in consideration of availability, price, etc., but if consideration is given to reducing the resistance when moving through the fluidized sandy soil, the long axis is preferred. Is more preferable. Also, the number of fountain pipes may be one or more.

In the fountain hole provided in the fountain pipe according to the third aspect of the invention, the lower fountain hole mainly functions to fluidize the sandy soil at the bottom of the sea below and settle the fountain pipe. The sandstone in front of the sinking fountain pipe is fluidized to release the eelgrass beds, and the upper fountain hole
It mainly works to float the eelgrass that has left the bed further upward. On the other hand, the fountain pipe in the third invention is the first fountain pipe.
Unlike the invention and the second invention, since the fountain pipe is set aside, it is difficult to settle down in the sandy soil on the sea floor. Is rotated so that most of the fountain holes face further downwards,
After the fountain has settled in the sandy soil on the seabed, rotate the fountain in the reverse direction so that the fountain hole faces forward or upward, and then return the eelgrass extractor forward, Alternatively, a sub fountain pipe with a fountain hole only at the bottom is provided, and only at the start, a high-pressure water stream is jetted downward from the fountain hole of the sub fountain pipe so that the horizontal fountain pipe sinks into the sandy soil on the sea floor. Is preferred.

[0010]

Since the eelgrass extractor according to the present invention has the above-described configuration, it operates as follows. When this eelgrass collecting machine is lowered to the sea floor and a high-pressure water stream is jetted from the fountain hole of the fountain tube, first, the high-pressure water flow jetted from the fountain hole directed to the sea floor fluidizes the sandy soil on the seabed, and the fountain pipe However, it sinks into the seabed until the bottom of the pedestal contacts the seabed.
In the eelgrass extractor according to the first invention, when the high-pressure water flow is further continued to be injected, the high-pressure water flow injected from the fountain hole provided in the pipe wall fluidizes the sandy soil on the sea floor around the fountain pipe. The eelgrass growing in the sandy soil comes up due to the buoyancy of the eelgrass itself. Also, the second
In the eelgrass extractor according to the invention and the third invention, after the fountain pipe sinks to the seabed, the gantry is towed by a ship or the gantry is pushed by hand, while continuing to further inject high-pressure water flow,
When the eelgrass extractor is advanced, the sandy soil on the seabed in front of the eelgrass is gradually fluidized, and the eelgrass growing there rises due to the buoyancy of the eelgrass itself. Therefore, the eelgrass can be collected by using tools such as a net or directly by hand, and the grown eelgrass can be collected.

[0011]

[Embodiment 1] FIG. 1 is a perspective view of an eelgrass collecting machine according to one embodiment of the first invention. In this figure, 1 is a gantry, 2 is a fountain pipe, 3 is a piping system, and 4 is a water receiving port. The fountain tube 2 is a cylindrical metal tube with a bottom having an inner diameter of about 2 cm. The fountain hole has an inner diameter of about 2 mm, not shown in FIG. ,
The peripheral wall is provided at a distance of about 5 cm in the longitudinal direction, at a distance of about 15 to 60 cm from the tip, and at an angle of 45 degrees in the circumferential direction. When this eelgrass collecting machine is lowered to the sea floor and a high-pressure water stream is sent from the ship to the receiving port 4,
The high-pressure water flow passes through the piping system 3 and is sent to 4 × 4 = 16 upright fountain pipes 2, and the high-pressure water flow is jetted from the fountain holes at the ends thereof to fluidize the sandy soil on the seabed, and the fountain pipes to To settle. At the same time, a high-pressure water jet is jetted from a fountain hole in a lower pipe wall of the fountain pipe 2, and the surrounding seabed sand is fluidized. Then, the eelgrass leaves the bed and floats due to the buoyancy of the eelgrass itself. It is collected using a tool such as a net or directly by hand.

[Embodiment 2] FIGS. 2 and 3 are a plan view and a side cross-sectional view of an eelgrass extractor according to one embodiment of the second invention. In these figures, 1 is a stand,
2 is a fountain pipe, 3 is a piping system, 4 is a water receiving port, 5 is a sled, 6 is a buffer material, 7 is a fin-shaped plate, 8 is a fixture, 9 is a holding frame, 10 is a fixed plate, 11 is a branch pipe, Reference numeral 12 denotes a pressure-resistant hose, 13 denotes a main valve, and 14 denotes a sub-valve. The fountain pipe 2 is a cylindrical metal pipe with a bottom having an inner diameter of about 2 cm, and the fountain hole is not shown in these figures, but has an inner diameter of about 2 mm, and is provided at the center of the bottom wall at the tip. Place, around 15 ~ from the tip
Up to 60 cm, it is provided at an interval of about 5 cm in the longitudinal direction, and at an angle of 45 degrees only on the entire surface in the circumferential direction. Further, a buffer material 6 is provided below the tip of the fountain tube 2 to prevent damage to the tip when the fountain is grounded on the seabed. A fin plate 7 is provided at the back of the fountain tube 2.
Bolt holes are provided at intervals of about 5 cm. In order to adjust the projecting length of the fountain tube 2, the bolt holes can be selected and fixed to the holding frame 9 via the fixture 8.
On the other hand, the fixing plate 10 is provided with several bolt holes, and in order to adjust the inclination angle of the fountain tube 2 and finely adjust the protruding length, the bolt holes are selected and the holding frame is selected. 9 can be fixed to the fixing plate 10.
The number of fountain tubes is six, and the interval is about 20 cm. Further, it is also possible to add one by one during that time to make a total of eleven. When such an eelgrass collecting machine is placed on the seabed, the rear part of the sled 5 and the projecting fountain pipe 2
With the cushioning material 6 at the tip of the sea bottom. In such a state, when the high-pressure water flow is introduced into the water receiving port 4 and the main valve 13 and the sub-valve 14 are opened, the high-pressure water flow spouts from the fountain hole at the tip of the fountain tube 2 and flows through the sandy soil on the seabed. And the fountain pipe 2 sinks in the fluidized sandy soil. At the same time, a high-pressure water jet blows out from the fountain hole in the wall of the fountain pipe, thereby fluidizing the surrounding sandy soil. In such a state, when the eelgrass collecting machine is moved forward, the sandy soil on the seabed in front of the eelgrass fluidizes, the eelgrass leaves the floor, and floats due to the buoyancy of the eelgrass itself. It is collected using a tool such as a net or directly by hand.

[Embodiment 3] FIG. 4 is a perspective view of an eel extractor according to an embodiment of the third invention. In this figure, 1 is a stand, 2 is a fountain pipe, 3 is a piping system, 4 is a water receiving port, 5 is a sled, 13 is a main valve, 14 is a sub valve, 15
Indicates a sub fountain pipe. The fountain pipe 2 is provided with a fountain hole extending from the front to the upper part.
It is provided in contact with the fountain pipe 2, and a fountain hole is provided only below. In order to operate this eelgrass collecting machine, after lowering to the seabed, first, a high-pressure water stream is sent to the sub-fountain pipe 15, and it is jetted downward to fluidize the sandy soil on the seabed, and the sub-fountain pipe 2 The fountain pipe 15 is settled in the fluidized seabed sandy soil. Next, the supply of the high-pressure water stream to the sub fountain pipe is stopped, the high-pressure water stream is sent to the fountain pipe 2, and the high-pressure water stream jetted from the front fountain hole fluidizes the front sand soil.
At the same time, the eelgrass growing there is released from the bed, and at the same time, the eelgrass that have left the bed is floated further upward by the high-pressure water jet injected from the upper fountain hole. It is collected using a tool such as a net or directly by hand. FIG.
In the above, the switching of the high pressure water flow from the sub fountain pipe 15 to the fountain pipe 2 is performed by opening and closing the sub valve 14, but the opening and closing may be remotely controlled from a ship or the like. The sub fountain pipe 15 and the fountain pipe 2, respectively,
The high-pressure water flow may be separately sent from a ship or the like, and the high-pressure water flow may be switched from the ship or the like. Also,
In FIG. 4, two pairs of the fountain pipe 2 and the sub fountain pipe 15 are provided so as to sufficiently float the eelgrass that has left the bed. However, the number of pairs is not limited to two and may be one. , May be more. Further, in FIG. 4, the fountain pipe 2 and the sub fountain pipe 15 are separate from each other, but the fountain pipe 2 and the sub fountain pipe 15 may be integrated in a horizontal portion, or one of the pipes. The inside may be divided into front and rear and divided into a fountain pipe and a sub fountain pipe. When there are two or more pairs of fountain pipes, the projecting length of each pair of fountain pipes does not necessarily have to be the same.

[0014]

The eelgrass extractor according to the present invention has the above-described structure and operation, so that the growing eelgrass is directly extracted to damage the root, cut the root, or damage the rhizome. Not only do they not hurt the roots and rhizomes by digging with a plow or the like, but also much more efficiently than manually removing them from the mainland one by one,
Also, without raising the seabed sand more than necessary,
It has the effect of collecting grown eelgrass,
Through the development of eelgrass beds on the newly constructed coastal seabed and the seabed where plants have disappeared, it greatly contributes to the purification and conservation of the environment in coastal waters, which are closely related to the health of the general public and the fishing industry. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view of an eelgrass extractor according to a first embodiment of the present invention.

FIG. 2 is a plan view of an eelgrass extractor according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of an eelgrass extractor according to a second embodiment of the present invention as viewed from a side.

FIG. 4 is a perspective view of an eelgrass extractor according to a third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 base 2 fountain pipe 3 piping system 4 water receiving port 5 sled 6 buffer material 7 fin plate 8 mounting fixture 9 holding frame 10 fixing plate 11 branch pipe 12 pressure-resistant hose 13 main valve 14 sub-valve 15 sub-fountain pipe

Claims (3)

(57) [Claims] 1. A gantry that can be installed on the seabed, two or more fountain pipes provided on the gantry such that their tips protrude below the grounding surface of the gantry, and have fountain holes at the tips and a lower peripheral wall, and the fountain. An eelgrass sampling machine characterized by comprising a piping system for supplying a high-pressure water flow to a pipe. 2. A gantry capable of moving on the seabed by an external force or by itself, a gantry provided on the gantry such that its tip protrudes downward and forward at an arbitrary inclination angle, and has a fountain hole in the tip and lower peripheral wall. An eelgrass collecting machine comprising the above fountain pipe and a piping system for supplying a high-pressure water flow to the fountain pipe. 3. A gantry capable of moving on the seabed by an external force or by itself, and a fountain hole provided horizontally below the grounding surface of the gantry with respect to the traveling direction and provided at an appropriate interval in a pipe wall. Characterized by a fountain pipe having a fountain pipe, and a piping system for supplying a high-pressure water flow to the fountain pipe.