JP5238110B1 - Weeds removal device - Google Patents

Abstract

[Purpose] It is possible to easily remove miscellaneous seaweed etc. even on the seabed of complex terrain, such as rocks with intense irregularities, etc. Weed seaweed etc. that can make fine removal work possible in the field where kelp grows Of a removal apparatus and removal method.
SOLUTION: Pressure generating means 12 for generating water pressure, water guiding hose 16 for guiding high pressure water pumped from the pressure generating means 12, and jet nozzles 20A, 20B for injecting water pumped from the water guiding hose 16 as jets And a removing device 10 that removes miscellaneous seaweed and the like that settles and grows on the reefs of the seabed by water jets jetted from the jet nozzles 20A and 20B. The jet nozzles 20A and 20B are installed in the header pipe 18. Yes.
[Selection] Figure 1

Description

  The present invention relates to an apparatus for removing miscellaneous seaweeds, etc., and removes miscellaneous seaweeds such as sugi rubber (cedar rubber) and fusisjimoku (tawara rubber) which are obstructive to the growth and growth of kelp, etc. The present invention relates to a removal device used to remove attached shells, seaweeds attached to fishing nets (stationary nets, aquaculture nets, etc.), dirt attached to concrete such as seawalls, and shells attached to drain pipes in factories and the like.

The miscellaneous seaweeds that flourish in submarine fields such as kelp in Hokkaido were detached from the seabed when winter drifted ice berthed in the winter, creating a situation suitable for the growth and growth of useful seaweeds such as kelp. In recent years, due to the influence of environmental changes such as global warming, the frequency of drift ice berthing has decreased in the eastern Hokkaido region, and the increase of miscellaneous seaweeds in submarine fields has become a problem. In addition, in the Hidaka area on the Pacific Ocean side, since drift ice cannot be seen from the shore, how to remove miscellaneous seaweeds is a major issue.

  There are various methods for peeling miscellaneous seaweed from before, such as using a power shovel loaded on a work boat, and scraping off seaweed on the seabed with a removal tool connected by a chain using a towing boat. However, it has problems that it is not suitable depending on the topography of the seabed or that it cannot be applied in deep water.

  As an example of such a seaweed removing device, there is a disinfecting device described in JP 2012-29672 A (Patent Document 1). The extermination machine described in the publication is composed of a submersible working machine that can move in the sea, a cutter for cutting and dividing miscellaneous seaweed, and a vibrator that generates high-frequency vibration. The liquefaction is caused by oscillating and the seaweed is cut with a cutter while being swirled with a fork for processing. According to this, miscellaneous seaweed can be removed with high work accuracy.

  Japanese Patent Application Laid-Open No. 2000-103387 (Patent Document 2) has a hydraulic excavator and a lifting winch device, one end of a sliding chain net is suspended from the tip of the hydraulic excavator, and the winch device There is disclosed a removal boat that scrapes off miscellaneous seaweeds by supporting the other end side so as to be able to move up and down and sliding the sliding chain net on the seabed. Since the structure is simplified, the invention is said to have advantages such as excellent durability.

  Furthermore, JP-A-8-290086 has a nozzle that injects a jet to an object such as miscellaneous seaweed, and peels the miscellaneous seaweed by the jet, and the direction of the jet is determined by the reaction force of the jet rebounding from the reef. Discloses an underwater injection device in which a rotor blade is rotated so that a water flow is generated in the opposite direction. According to the apparatus, it is possible to collect floating substances such as separated seaweeds with a rotary blade, and it is possible to prevent the movement of the injection apparatus by canceling the reaction force of the jet flow.

JP 2012-29672 A JP 2000-103387 A JP-A-8-290086

However, among the removal devices described above, the extermination machine described in Patent Document 1 has an underwater work machine that moves in the sea as an essential component, so that it is difficult to use it on a seabed with uneven terrain, such as rocky rocks with severe irregularities. There was a problem.
In addition, the invention relating to the seaweed removal boat described in Patent Document 2 has a problem that the seaweed that cannot be scraped off remains due to the scraping operation of the seaweed by sliding the sliding chain net along the seabed. There is a problem that it is not suitable for fine removal work.
Furthermore, in the case of the underwater injection device described in Patent Document 3, when collecting miscellaneous seaweeds, a stem of miscellaneous seaweed separated from the seabed is caught on the rotor blade, thereby preventing the rotor blade from rotating. As a result, the removal work of miscellaneous seaweed could not be performed smoothly.

The present invention has been made in view of such circumstances, and it is possible to easily remove miscellaneous seaweed and the like even on the seabed of complex terrain, such as rocks with severe irregularities, and the growth of kelp An object of the present invention is to provide a removal device for miscellaneous seaweed and the like that enables fine removal work for each farm field.
Also applicable to removing shells attached to hulls and side cluster pipes, seaweed attached to fishing nets (fixed nets, aquaculture nets, etc.), dirt attached to concrete, shells attached to drain pipes in factories, etc. An object of the present invention is to provide a device for removing possible seaweed and the like.

In order to achieve the above object, the invention according to claim 1 is characterized in that the pressure generating means for generating water pressure, the water guiding hose for guiding the high-pressure water pumped from the pressure generating means, and the water feeding hose are pumped from the water guiding hose. A removing device that removes miscellaneous seaweed and the like that settles and grows on a rock at the bottom of the sea by a water jet ejected from the jet nozzle, the jet nozzle ejecting water as a jet, and having a diameter D ₀ ( The relationship between m) and the pre-nozzle pressure head P (m) to which the nozzle is attached is 5 ≦ 1,570 · D ₀ ² · P ≦ 40.

A second aspect of the present invention is characterized in that, in the first aspect, the jet nozzle is installed in a header pipe.

  According to a third aspect of the present invention, in the first and second aspects, the header pipe is connected by a sliding chain that can move underwater along the seabed, and the header pipe is connected along the seabed by the sliding chain. It is characterized by removing miscellaneous seaweed and the like by jetting a jet while moving.

A fourth aspect of the present invention is characterized in that, in the first, second, or third aspect, the header pipe is connected to a movable part of a heavy machine by a sliding chain.

  According to a fifth aspect of the present invention, in the first, second, third, or fourth aspect, the header pipe is provided with a fixing line as a locking means for receiving a reaction force of a jet generated during the removing operation. Is prevented from moving in the opposite direction to the jet and can be held at a fixed position.

  A sixth aspect of the present invention is the method according to any one of the first, second, and third to fifth aspects, wherein the locking means of the header pipe is capable of adjusting a fixed cable and a length of the fixed cable. And an anchor capable of being driven into the seabed is provided at the tip of the fixed cable.

  According to the present invention, it is possible to efficiently remove miscellaneous seaweed and the like in the kelp field, and since the equipment used is simple, both the running cost and the initial cost can be significantly reduced.

It is a schematic block diagram which shows the structure of one Embodiment of removal apparatuses, such as a miscellaneous seaweed which concerns on this invention. Similarly, it is the figure which showed the header pipe | tube which is the principal part of removal apparatuses, such as a miscellaneous seaweed of this embodiment. It is explanatory drawing which shows the outline | summary at the time of performing a removal operation | work using the removal apparatus, such as a miscellaneous seaweed which concerns on this invention. Is a graph showing the relationship between the header pressure head P and the nozzle diameter D ₀ in the case of using the apparatus for removing coarse seaweed or the like of the present embodiment. Similarly, it is a graph showing the relationship between the header pressure head P and the relationship between the flow rate Q when using the removal device for miscellaneous seaweed and the like of the present embodiment. Similarly, the nozzle inner diameter D ₀ and the apparent diameter miscellaneous seaweed is removed when using the device for removing coarse seaweed or the like of the present embodiment (mm), showing the relationship between the jet nozzle tip and reefs distance (mm) It is a graph. It is the top view and side view which showed other embodiment of the header pipe | tube which is the principal part of removal apparatuses, such as a miscellaneous seaweed which concern on this invention. It is a schematic explanatory drawing which shows the case where the removal operation of miscellaneous seaweed is performed with the header pipe | tube shown by FIG. It is a side view which shows the structure of other embodiment of removal apparatuses, such as a seaweed etc. which concern on this invention. Similarly, it is the side view and top view which show the structure of other embodiment of removal apparatuses, such as a seaweed etc. which concern on this invention. It is explanatory drawing which shows an effect | action at the time of removing a miscellaneous seaweed using the removal apparatuses, such as a miscellaneous seaweed of FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a removal device and a removal method for miscellaneous seaweed and the like according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic configuration diagram showing the configuration of a removal device for miscellaneous seaweed and the like in one embodiment of the present invention, and FIG. .
As shown in FIG. 1, the removal device 10 for miscellaneous seaweed or the like according to this embodiment includes a pressure generating means 12, a seawater suction pipe 14, a water guiding hose 16, a header pipe 18, jet nozzles 20 </ b> A and 20 </ b> A, and the like. .

The pressure generating means 12 includes a high-pressure pump main body 12A mounted on a work ship such as a diving ship 50 and driven by a drive engine 12B, and has a discharge amount of 0.03 to 2.0 (m ³ / min), a discharge pressure. A device having a capacity in the range of 2.0 to 15.0 (kg / cm ² ) is suitable. The pressure generating means 12 continuously sucks seawater from the sea and supplies a sufficient amount of water to the header pipe 18 without interruption.

  A seawater suction pipe 14 is connected to the suction port of the high-pressure pump main body 12A, and seawater is sucked from the suction port 14 '. A water guide hose 16 is connected to the discharge port. These pipes and hoses are flexible and are formed of a material that can be easily routed from the seawater suction pipe 14 to the header pipe 18 into the sea. For example, a watering cloth hose used for a fire hose can be used. It is. The water guide hose 16 is connected to the introduction pipe 22 of the header pipe 18 by a connection member 24. Thereby, the seawater sucked from the sea can be continuously supplied from the discharge port of the high-pressure pump main body 12 </ b> A to the header pipe 18 through the water guiding hose 16.

  As shown in FIG. 2A, the header pipe 18 formed in a T shape has an introduction pipe 22 connected to the rear side surface of the header pipe body 18A, and the header pipe body 18A and the introduction pipe. A handle 26 is attached between the two. The handle 26 makes it possible for an operator (a diver) to grip the seaweed removal work in the sea, thereby facilitating the work.

As shown in FIG. 2B, a nozzle connection port 18B is provided on the front side of the header pipe body 18A, and the nozzle connection port 18B is installed at an arbitrary angle θ with respect to the header pipe body 18A. A jet nozzle 20A is attached to the nozzle connection port 18B, and these jet nozzles 20A can easily remove miscellaneous seaweed if the inner diameter is within a range of 5 to 50 (mmφ). 9 to 30 (mmφ). The miscellaneous seaweed is removed from the nozzles within the range while scraping together with the sediment at the bottom of the sea by a water jet jet.
In the present embodiment, the number of jet nozzles is two. However, the number of jet nozzles is not limited to this, and the number can be appropriately increased or decreased as long as the header pressure head can be maintained constant.

  In the header pipe 18, the header pipe body 18 </ b> A has a diameter larger than that of the introduction pipe 22, so that the pressure in the header pipe 18 can be easily maintained constant. In other words, the role of the header pipe 18 is to attach a plurality of nozzles 20A to enable efficient removal of miscellaneous seaweed. The header pipe body 18A has a larger diameter than the introduction pipe 22 in order to eliminate variations in the jet flow rate injected from each jet nozzle when the number of jet nozzles is increased, thereby preventing pressure loss in the header pipe body 18A. Yes.

(Example)
A case where a diver performs an actual operation of removing seaweed at the site will be described. FIG. 3 is an explanatory diagram showing an outline when performing work using the removal device for miscellaneous seaweed and the like according to the present invention, and shows a case where work is performed by one diver.
The purpose of the removal experiment is to remove the miscellaneous seaweed stuck to the uneven part of the bedrock in the kelp field, and to determine the optimum operating conditions of each device when removing the miscellaneous seaweed. In the experiment, the diver Y communicated with the ground by wire while diving, and the removal operation was repeated while adjusting the pressure and flow rate of the high-pressure pump 12A. The removal performance was verified by comparing the conditions of the seabed before and after the experiment.

As shown in FIG. 3, in the actual operation of removing seaweed, seawater pumped directly from the sea by the pump body 12A mounted on the diver's ship 50 was pumped to the header pipe 18 via the sprinkling cloth hose 16A. Four jet nozzles having a nozzle diameter of 0.0096 (mφ) are attached to the header pipe main body 18A, and a diver Y operates the header pipe 18 to discharge water jets from each jet nozzle, and miscellaneous seaweed grows. Removal work of miscellaneous seaweed was carried out by colliding with the bedrock.

As a result, the area that could be removed in a working time of 10 minutes was about 8 m ² . Moreover, when the diver Y performs the operation of removing seaweeds, it is important to reduce the reaction force applied to the diver Y and reduce the work load. Since the reaction force is almost the same as the collision force, it was also found that the removal of miscellaneous seaweed by the water jet desirably has the collision force F in the range of 5 to 40 kg.
The specifications of the high-pressure pump 12A used in the experiment are a discharge amount of 1.7 (m ³ / min) and a discharge pressure of 9.5 (kg / cm ² ).

Based on the actual work results, the following knowledge was obtained regarding the effects of operating conditions, nozzle diameter, header pressure head, and flow rate on the removal of seaweeds. The water jet has a characteristic that it flows in the downstream direction while entraining the surrounding seawater and widening the jet flow width while decreasing the speed due to the effect of the speed difference and viscosity with the surrounding seawater.

In addition, the method of removing miscellaneous seaweed by the impact force of the water jet is based on the nozzle diameter D ₀ (m) and the header (pre-nozzle) pressure head P (m) even if the cross-sectional shape of the nozzle outlet that discharges the water jet is the same. The removal performance of miscellaneous seaweed is greatly influenced. It has been found that the condition under which weeds can be removed with a single nozzle is the following equation (1).
5 ≦ 1,570 ・ D ₀ ²・ P ≦ 40 ・ ・ ・ ・ （1）

Here, the minimum value “5” in the formula (1) indicates that when the water jet collides with the reef within a distance of 30 to 250 (mm) from the nozzle tip to the reef, miscellaneous seaweed is removed from the reef. This means that the minimum collision force is 5 kg. The maximum value “40” is the minimum collision force at which the reef is crushed by a water jet collision within the same distance range. That is, if the impact force F of the water jet on the reef is 5 kg or more and 40 kg or less, it is possible to remove miscellaneous seaweeds that grow on the reef and to be removed without destroying the reef. It became clear. In addition, a reaction force due to a jet is applied to the diver Y who works in the water, but the range is set in consideration of the ease of work for the diver Y.

For the constant "1,570", the specific weight γ of seawater is 1,000 (kg / m ³ ), the acceleration g of gravity is 9.8 m / s ² , and the angle θ between the reef and the jet direction is 90 °. The force F acting in the direction of the jet at the time is calculated by the following equation (2).
F = (γ / g) Q · V · sin ² θ = (γ / g) A · V ² · sin ² θ = (γ / g) (π / 4) D ₀ ² · 2 · g · P · sin ² θ
≒ 1,570 ・ D ₀ ²・ P ・ ・ ・ ・ （2）

FIG. 4 is a graph showing the relationship between the header pressure head P and the nozzle diameter D ₀ , where the horizontal axis is the nozzle diameter D ₀ (m) and the vertical axis is the header pressure head (m). FIG. 5 is a graph plotting the relationship between the header pressure head P and the flow rate Q in Tables 1 and 2 below.
As shown in these figures, the portion surrounded by the collision force F = 5 kg and the collision force F = 40 kg is the area where weeds can be removed, but this area is between the nozzle tip and the reef. When the distance F is in the range of 30 to 250 (mm) and the impact force F of the water jet on the reef is 5 kg or more and 40 kg or less, weeds can be removed without destroying the reefs. It is set corresponding to the possible range.

FIG. 6 is a graph showing the relationship between the apparent diameter (mm) from which miscellaneous seaweed has been removed using the removal apparatus according to the present embodiment, and the distance between the tip of the jet nozzle and the reef (mm). Here, the apparent diameter is a hydraulic diameter and is defined by the following equation (3).
Hydrodynamic diameter = 4 × (area from which weeds were removed) / (peripheral length of the removed area) to (3)

In this example, the removal experiment was performed in four ways of 33.0 (mmφ), 20.6 (mmφ), 9.6 (mmφ), and 1.3 (mmφ) per nozzle diameter D ₀ of the jet nozzle. . As shown in the figure, the apparent diameter that can be removed increases as the nozzle diameter increases, but the removal efficiency decreases as the distance between the jet nozzle and the reef increases. From the above results, it was found that the inner diameter of the jet nozzle is optimal within the range of 5 to 50 (mmφ), preferably within the range of 5 to 30 (mmφ).

On the other hand, the distance between the reef and the tip of the jet nozzle is generally 10 to 250 (mm). The shortest 10 (mm) is a distance at which the nozzle can be brought closest in consideration of workability, and the distance exceeding the maximum 250 (mm) is a distance at which the efficiency of the removal work becomes inefficient. That is, if it exceeds 250 (mm), a large amount of jet water is required to maintain the jet velocity, so that the pressure loss of the water guiding hose 16 to the header pipe 18 also increases. As a result, the pump main body 12A The capacity must be increased, resulting in an increase in the cost of the entire apparatus. From the above, it has been found that the distance between the tip of the jet nozzle and the reef is in the range of 30 to 250 (mm), preferably in the range of 50 to 200 (mm). Of course, the optimum distance varies depending on the nozzle diameter.

FIG. 7 is a plan view and a side view showing another embodiment of the header pipe.
The header pipe 30 shown in FIG. 7 has a header pipe main body 30A, and a nozzle connection port 30B to which a jet nozzle 31A is attached is provided on the front side of the header pipe main body 30A. An introduction pipe 33 is vertically attached to the header pipe main body 30 </ b> A, and the above-described water guiding hose can be connected using a cam lock portion 33 </ b> A provided at the end of the introduction pipe 33. A handle 33B is provided on the side surface of the introduction pipe 33, and a valve 33C is provided.

  On the upper side of the header pipe body 30A, a manual winch 32 is installed as a winding means. The winch 32 has a winding part 32A, a winding lever 32B, a ratchet claw 32C, and a locking part 32D. Yes. A rope (fixed cable) 34 is wound around the winding portion 32A, and the length can be adjusted by the rotatable winding portion 32A. An anchor 36 is attached to the tip of the rope (fixed cable) 34, and this anchor 36 can fix the header pipe body 30A by driving into the seabed.

  FIG. 8 is a schematic explanatory view showing a case where a weed seaweed is removed by the header tube 30. As shown in the figure, the anchor 36 is driven into the seabed during the removal operation, and the rope 34 is wound up by the winch 32, and the ratchet pawl 32C is engaged with the disc-shaped locking portion 32D to thereby increase the length of the rope 34. The header pipe 30 is fixed while keeping the pressure constant, and the influence of the reaction force generated by the discharge of the jet flow is reduced. In other words, by working with the rope 34 stretched, the reaction force acting in the direction opposite to the water jet can be absorbed, so the diver supporting the header pipe 30 can perform the removal work stably. Therefore, fatigue due to work can be reduced.

As a result, it is possible to install a plurality of nozzles in the header pipe 30 and increase the impact area of the water jet to increase the removal efficiency of miscellaneous seaweed. In addition, since the header pressure head can be increased, it is possible to remove miscellaneous seaweed in a state where the distance between the tip of the jet nozzle and the reef is separated, which contributes to improvement in the efficiency of the removal work.

  FIGS. 9 and 10 are side views showing another embodiment of the apparatus for removing miscellaneous seaweeds, wherein the header pipe 18 is attached to an excavator (movable part) of a backhoe (heavy underwater machine). Among these, in FIG. 9, the header pipe 18 is attached to the excavator 42 of the backhoe 40 by, for example, an attachment member 43 formed in a ring shape, and the water is discharged from the jet nozzle 20A of the header pipe 18 while the operator operates the backhoe 40. To remove miscellaneous seaweed. According to this, it is suitable for the removal work in the comparatively shallow reef part which can work while visually observing.

  In FIG. 10, the header pipe 18 is connected to the upper side of the three sliding chains 44 with respect to the excavator (movable part) 42 of the backhoe (heavy machine) 40, and the header pipe 18 is connected by the excavator 42 of the backhoe 40. Removes seaweeds by towing. The direction of the jet nozzle 20A attached to the header pipe 18 with respect to the movement direction J of the excavator 42 faces the same direction K as the movement direction J of the excavator 42, and jets the jet toward the traveling direction. It has become. The direction of the jet nozzle 20A is set in such a way as to prevent miscellaneous seaweed that has been removed and floating in the sea from filling the reef after removal. In FIG. 10, the header pipe 18 is pulled by the backhoe 40 via the sliding chain 44, but can be pulled by other equipment such as a work boat.

FIG. 11 is an explanatory diagram showing the operation when removing the seaweed using the seaweed removing apparatus shown in FIG. As shown in the figure, the header pipe 18 is moved along the seabed Z by its own weight in the K direction while being wound by the slide chain 44 by the excavator 42 of the backhoe 40, and at that time, four jet nozzles By spraying water from 20A, miscellaneous seaweed growing on the seabed Z is removed, and miscellaneous seaweed is floated upward. According to this, the sliding chain 44 moves along the unevenness of the reef on the seabed, and the distance between the tip of the jet nozzle 20A and the reef is kept substantially constant, so that the removal operation can be performed stably. Is possible.
In order to smoothly sink the header to the seabed, a weight may be installed in the header body or in the vicinity of the header.

  In the above embodiment, the header pipe 18 uses a member having a cylindrical cross section. However, the shape is not limited to this, and the shape is not limited to this. The purpose of the header pipe 18 is to attach a plurality of jet nozzles to efficiently remove seaweeds. However, since it is necessary to reduce the pressure loss in the header pipe 18, it is necessary to increase the capacity of the header pipe body 18 </ b> A to prevent the pressure loss.

Moreover, although the case where miscellaneous seaweed is removed is demonstrated in the above embodiment, it is not restricted to this, The sea shell attached to the hull and the side cluster pipe, the seaweed attached to the fishing net (stationary net, aquaculture net, etc.), concrete It is also possible to use this apparatus for removing dirt adhering to the shell and shells attached to a drain pipe in a factory or the like.

According to this embodiment, it is possible to efficiently remove miscellaneous seaweed that grows on uneven rocks with irregular terrain, and it is possible to suppress an increase in cost required for the removal work. .

As described above, according to the present invention, it is possible to finely and efficiently remove miscellaneous seaweeds and the like growing in a field where kelp grows regardless of the topography of the seabed.

DESCRIPTION OF SYMBOLS 10 Removal device of miscellaneous seaweed 12 Pressure generating means 12A High pressure pump main body 12B Drive engine 14 Seawater suction pipe 14 'Suction port 16 16A Water transfer hose 18 Header pipe 18A Header pipe main body 18B Nozzle connection port 20A Jet nozzle 22 Introduction pipe 24 Connection member 26 Handle 30 Header pipe 30A Header pipe body 30B Nozzle connection port 31A Jet nozzle 32 Manual winch 32A Winding part 32B Winding lever 32C Ratchet claw 32D Locking part 33 Introduction pipe 33A Cam lock part 33B Handle 33C Valve 34 Rope 36 Anchor 40 Heavy machine (Backhoe)
42 Excavator 43 Mounting member 44 Sliding chain 50 Submarine ship

Claims (6)

Pressure generating means for generating water pressure, a water guiding hose for guiding high-pressure water pumped from the pressure generating means, and a jet nozzle for jetting water pumped from the water guiding hose as a jet, A removal device that removes miscellaneous seaweed and the like that settles and grows on a rock at the bottom of the sea by a jet of water jetted,
The relationship between the diameter D ₀ (m) of the jet nozzle and the pre-nozzle pressure head P (m) is:
5 ≦ 1,570 · D ₀ ² · P ≦ 40
An apparatus for removing miscellaneous seaweed, etc. The apparatus for removing miscellaneous seaweed or the like according to claim 1, wherein the jet nozzle is installed in a header pipe. The removal device for miscellaneous seaweed or the like according to claim 1 or 2, wherein the header pipe is detachably attached to a movable part of a heavy machine via an attachment member. The header pipe is connected by a sliding chain that can move underwater along the seabed, and removes miscellaneous seaweed and the like by jetting a jet while moving the header pipe along the seabed by the sliding chain. The removal apparatus for miscellaneous seaweed or the like according to claim 1 or 2, or claim 3 characterized by the above-mentioned.   The header pipe is provided with a fixing line as a locking means for receiving the reaction force of the jet generated during the removing operation, so that the header pipe can be prevented from moving in the direction opposite to the jet and can be held at a fixed position. The removal device for miscellaneous seaweed or the like according to claim 1, 2, or 3 or 4. The header pipe locking means has a fixed cable and a winding means capable of adjusting the length of the fixed cable, and an anchor that can be driven into the sea floor is provided at the tip of the fixed cable. The removal device for miscellaneous seaweed or the like according to any one of claims 1 and 2, or 3 to 5.

Images