Floating matter removal device

Abstract

To remove a large amount of pumice stone drifting on the sea surface.SOLUTION: A floating matter removal device is, for example, like a dustpan (a drifting pumice stone and the like intake port structure comprising a depth restriction part for restricting suction sea surface depth, an opening restriction part for restricting a suction sea surface opening, a suction opening which is constructed in front by the depth restriction part and the opening restriction part, and a pumice stone and the like suction port arranged at the back of the depth restriction part and the opening restriction part), and it sucks pumice stone and the like and treats it by applying a suction force to the pumice stone and the like suction port existing at a portion corresponding to a handle of a normal dustpan.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a device for efficiently recovering floating pumice that drifts on the sea surface in large quantities due to explosions such as undersea volcanoes, and floating objects that drift on the sea surface in large quantities due to tsunamis or the like from the water surface such as the sea surface.

Background Art

[0002] In 2021, a problem occurred where a large amount of pumice, presumably generated by the eruption of the undersea volcano "Futago-ka-no-Ba" in the Ogasawara Islands, drifted across the Pacific Ocean and washed up on the coasts of Okinawa Prefecture and Kagoshima Prefecture. As of November 2021, the pumice is predicted to drift even offshore of the Kanto region, raising concerns about adverse effects such as engine trouble for fishing boats and the death of cultured fish in fish farms due to oxygen deficiency. Countries and prefectures that manage fishing ports are rushing to prepare equipment for preventing the pumice from washing up, but no effective countermeasures against pumice have been found yet. Moreover, similar situations are assumed not only for eruptions of undersea volcanoes, but also for various cases such as the scattering of cargo on the sea due to a grounded cargo ship, and the outflow of plastic waste into the sea or lakes due to floods.

[0003] Conventionally, dredging operations in the sea, rivers, and lakes have mainly been carried out on the materials accumulated at the bottom. Also, in the case of floating objects on the sea surface, oil flowing out from a grounded tanker or the like may be recovered, but since it is a fluid, the recovery was relatively easy.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] The dredging technology described in Patent Document 1 can remove mud deposited on the seabed, gravel deposited on the seabed, etc., but it could not recover pumice floating on the sea surface, plastic waste, etc.

[0006] The technology for recovering spilled oil described in Patent Document 2 is different from that of Patent Document 1 in that it can recover floating substances on the sea surface, but there is a problem in that it is limited to liquids such as oil and cannot be applied to floating substances on the sea such as pumice.

[0007] An object of the present invention is to efficiently and on a large scale remove solid waste such as pumice and plastics floating on the sea surface, lake surface, river water surface, etc.

[0008] The present invention was created in view of the above-described problems, and an object thereof is to provide an apparatus and method for efficiently and on a large scale removing an extremely large amount of unnecessary solid floating substances caused by submarine volcanic eruptions, etc.

Means for Solving the Problems

[0009] In order to achieve the above object, as a first means, a depth control unit for regulating the suction water surface depth, an opening degree control unit for regulating the suction water surface opening degree, a suction opening formed forward by the depth control unit and the opening degree control unit, and a pumice suction port disposed behind the depth control unit and the opening degree control unit, to provide a floating pumice intake structure.

[0010] Also, as a second means, a floating pumice intake structure based on the first means is provided, which further has a depth maintaining unit for maintaining the depth control unit of the floating pumice intake structure at a predetermined position below the water surface.

[0011] Furthermore, as a third means, a floating pumice intake structure based on the first means or the second means is provided, which further has a guiding unit provided in front of the suction opening for guiding floating pumice and the like to the suction opening.

[0012] Furthermore, as a fourth means, the depth maintenance unit provides a floating pumice stone intake structure based on any one of the first to fourth means, which has an adjusting means for vertically adjusting the depth regulating unit.

[0013] Moreover, as a fifth means, a floating pumice stone removing device is provided, which consists of any one of the floating pumice stone intake structures of the first to fourth means and a forced moving device for forcibly moving the floating pumice stone etc. toward the suction opening of the floating pumice stone intake structure.

[0014] Furthermore, as a sixth means, a floating pumice stone removing device is provided, which consists of any one of the floating pumice stone intake structures of the first to fourth means and a suction device, which includes an ejector for sucking pumice stone etc. from the pumice stone etc. suction port and a driving fluid pump for driving the ejector.

[0015] Furthermore, as a seventh means, a floating pumice stone removing device is provided, which consists of any one of the floating pumice stone intake structures of the first to fourth means and a float device for floating on the water surface, which has a support portion for supporting the floating pumice stone intake structure.

[0016] Moreover, as an eighth means, a floating pumice stone removing device is provided based on any one of the fifth to seventh means, which further has a suction device, which includes an ejector for sucking pumice stone etc. from the pumice stone etc. suction port and a driving fluid pump for driving the ejector.

[0017] Furthermore, as a ninth means, a floating pumice stone removing device is provided based on any one of the fifth to eighth means, which further has a silt fence arranged to guide the floating pumice stone etc. toward the suction opening of the floating pumice stone intake structure.

[0018] Moreover, as a tenth means, a floating pumice stone removing device is provided based on any one of the fifth to ninth means, which further has a sieve device for separating the floating pumice stone etc. sucked by the suction device from seawater etc.

[0019] Furthermore, as an eleventh means, there is provided a method for removing floating pumice stones or the like, including a step of removing floating pumice stones or the like floating on the sea using the floating pumice stone intake structure described in any one of the first to fourth means.

[0020] Furthermore, as an eleventh means, there is provided a method for removing floating pumice stones or the like based on the eleventh means, including a step of removing floating pumice stones or the like floating on the sea by setting the upper surface of the depth regulating portion of the floating pumice stone intake structure described in any one of the first to fourth means below the underwater depth of the pumice stones or the like floating on the sea.

[0021] Furthermore, as a thirteenth means, there is provided a method for removing floating pumice stones or the like based on the eleventh means or the twelfth means, further including a step of arranging a silt fence so that the interval gradually becomes narrower toward the suction opening of the floating pumice stone intake structure described in any one of the first to fourth means.

[0022] It should be noted that the present invention targets the removal of unwanted substances that are discrete or accumulated on the water surface. However, the removal target is not limited to the water surface and may be an oil surface or other liquids. Furthermore, the removal targets include pumice stones, plastic garbage, etc., but are not limited to these, and various floating substances such as pieces of wood and aquatic plants (e.g., water hyacinths) are targeted.

Effect of the Invention

[0023] According to the present invention, floating substances such as pumice stones floating discretely or accumulated in large quantities on the sea surface or the like can be efficiently and quickly recovered.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the scope of the present invention is not limited by the embodiments described below, and various modifications and changes can be made to the embodiments described below without departing from the gist of the present invention.

[0026] Note that in "Embodiment 1", mainly "Claims 1, 2, 3, 4" will be described. In "Embodiment 2", mainly "Claims 5, 6, 7, 8, 9, 10" will be described. In Embodiment 3, mainly "Claims 11, 12, 13" will be described. <Overview of Embodiment 1>

[0027] Embodiment 1 is a pumice floating on the sea surface and other intake structures used to remove pumice, etc., and is a structure used as a part of a pumice removal device described later. <Configuration of Embodiment 1>

[0028] FIG. 1 is a diagram showing the pumice intake structure of the present embodiment. The pumice intake structure includes a depth control unit, an opening degree control unit, a suction opening, a pumice suction port, and a depth maintenance unit, a guiding unit, and adjustment means as necessary. <Pumice intake structure (0105): Embodiment 1: Mainly corresponding to Claim 1>

[0029] As shown in FIG. 2, the "pumice intake structure (0105)" has a function of taking in unwanted substances when removing unwanted substances that are discrete or accumulated on the water surface and sending them out for subsequent processing. As an example, it is shaped like a dust collector with a suction port at the handle part. When actually used on the water surface, not only one unit but also multiple units can be closely arranged and used. When arranging them, they can be arranged in a horizontal row or in a V-shape with the front open. The pumice intake structure may be portable or fixed, such as fixing a float to the shore and arranging it in a fixed state on the float at all times. In addition, the float itself can be configured to have a propulsion force so that it can move freely on the water surface. The type of the float is not particularly limited as long as it is a structure that floats on the water surface with buoyancy. It may be a combination of a plurality of hollow plastic block bodies, a boat, a ship, a float, etc.

[0030] <Depth control unit (0101): Embodiment 1: Mainly corresponding to Claim 1>

[0031] The "depth control unit (0101)" has a function of regulating the depth of the suction water surface. The pumice suction port described later sucks unnecessary objects in the front by means of a pump, an ejector, etc. However, if the range where the suction flow occurs in water is too wide, it is impossible to effectively suck the floating unnecessary objects. Since the depth at which unnecessary objects such as pumice, plastic, and aquatic organisms sink below the sea surface is almost determined according to the type of the unnecessary objects, a depth control unit is provided to regulate the range where the suction flow occurs with a certain margin. The depth control unit is typically a plate-like structure as shown in Fig. 1, but it may be a block or other shape without being limited thereto.

[0032] Also, the depth control unit may be configured to be able to adjust its vertical position relative to the opening degree control unit described later. For example, a plurality of grooves may be provided in parallel inside the opening degree control unit, and the vertical position may be adjusted according to which groove the depth control unit is inserted into. Also, it may be configured such that the vertical position is adjusted by a drive mechanism such as a motor. The width of the depth control unit can be designed according to the degree of dispersion and accumulation of floating objects and the size of the floating objects, ranging from 50 centimeters to about 10 meters. When it is plate-like, a metal plate can be used. The length of the depth control unit can also be designed according to the situation, ranging from 70 centimeters to about 2 meters, similar to the width. A typical shape of the depth control unit is a rectangle or a trapezoid whose length is longer than the width.

[0033] <Opening degree control units (0102a, 0102b): Embodiment 1: Mainly corresponding to Claim 1>

[0034] The "opening degree regulating part (0102a, b)" has a function of regulating the opening degree of the suction water surface. The opening degree of the suction water surface has a function of regulating the widths of one opening degree regulating part (0102a) and the other opening degree regulating part (0102b), and a function of regulating the angle formed by one opening degree regulating part (0102a) and the other opening degree regulating part (0102b). In the example of Fig. 1, the opening degrees are parallel, but for example, it can also be configured in an inverted V shape so that the widths of both become wider towards the front. Also, the opening degree regulating part can be configured to be variable in opening degree, and by making the opening degree variable, the opening degree can be adjusted and optimized according to the type of floating matter.

[0035] The adjustment of the opening degree may be manual or motor-driven. The height of the opening degree regulating part is about 30 centimeters to 1 meter, and the optimal value can be selected according to the type of floating matter and the depth of the layer under the water surface. In addition, when the depth regulating part is arranged at an appropriate depth under the water surface, the opening degree regulating part needs to be designed and arranged so that its upper end line does not sink under the water surface. This is because the floating matter cannot be accurately captured. In addition, there is an optimal height for the opening degree regulating part according to the calmness of the water surface. On a water surface with waves such as the sea or a large lake, it is necessary to set the height of the opening degree regulating part higher than the wave height. This is because the removal target once taken into the intake structure such as drifting pumice may be exposed to the waves. Therefore, it is preferable that the height of the opening degree regulating part is configured to be adjustable according to the wave height on that day and the like.

[0036] <Suction opening (0103): Embodiment 1: Mainly corresponding to Claim 1>

[0037] The "suction opening (0103)" is configured at the front by a depth control part and an opening control part. The front refers to the direction where pumice and other floating substances are located. Since it is composed of a depth control part and an opening control part, the width is about 50 centimeters to 10 meters, and the height is about 30 centimeters to 1 meter. Note that a fence can also be configured to be provided at the suction opening so that floating substances larger than the object to be removed are not sucked. Furthermore, it is also conceivable to provide a crusher for crushing floating substances in front of or near the suction opening. This is to prevent blockages caused by the floating substances sucked by the pumice suction opening and the like described later. Also, in order to create a state where there are no floating substances in the subsequent pipes and hoses for the end of the suction operation, a fine fence for allowing only seawater or the like to pass through can be provided so as to be openable and closable, or a structure for holding a filter can be provided, etc.

[0038] <Pumice suction opening (0104); Embodiment 1: Mainly corresponding to Claim 1>

[0039] The "pumice suction opening (0104)" is a suction opening for floating substances provided on the rear side of the depth control part and the opening control part, and it is the opening through which the floating substances sucked through the pipes and hoses connected to it are sent out for post-treatment. For the pumice suction opening, if the rear part of the drifting pumice intake structure is configured in a funnel shape so that floating substances can be concentrated efficiently, an efficient suction flow can be generated. Also, in front of the pumice suction opening, it is preferable to provide a lid above the box body constituting the drifting pumice intake structure so as to reduce the amount of air flowing into the pumice suction opening. Furthermore, the inner wall surface constituting the upper part of the pumice suction opening is preferably arranged at a position below the water surface. This is also for reducing the inflow of air.

[0040] Therefore, it is preferable that the funnel-shaped rear structure is configured such that its height gradually decreases. That is, it is preferable that the funnel-shaped rear structure is configured such that the height between the top and bottom gradually decreases. It can also be configured such that the bottom surface side gradually rises. The cross-sectional area of the pumice suction port or the like is preferably about 10 cm × 10 cm (not limited to a rectangle) to about 50 cm × 50 cm (not limited to a rectangle). It can be appropriately designed according to the diameter of the pipe or hose connected here and the size of the object to be sucked.

[0041] <Depth maintaining part (0601, 0602): Embodiment 1: Mainly corresponding to Claim 2 and Claim 4>

[0042] The "depth maintaining part" (0601, 0602) has a function to maintain the depth regulating part of the floating pumice intake structure at a predetermined position below the sea surface. As described above, the depth regulating part is a functional part for regulating the depth of the suction area in water, and the arrangement depth of the depth regulating part must be determined according to how deep the floating pumice is distributed below the water surface. Therefore, the floating pumice intake structure must have a function to maintain the depth of the depth regulating part during the working time.

[0043] In the example of Fig. 6, a vertical winding pipe (0601) fixed to the floating pumice intake structure is fixed on a float floating on the water surface, and this vertical winding pipe is adjusted by the winding amount of the winding rope fixed to it by a winding winch (adjusting means) to set a fixed winding amount, so as to maintain the position of the floating pumice intake structure located below the water surface, and thus the position of this depth regulating part below the water surface. Whether the vertical winding pipe is solid or hollow does not matter. Also, the vertical movement of the vertical winding pipe is not limited to being caused by the winding rope. It may also be vertically moved by rotating wheels in close contact with the vertical winding pipe in the vertical direction, or may be configured to move vertically and be fixed by other means. In addition, the depth maintaining part can also be configured to move up and down in synchronization with the up and down movement of the waves in a place where the up and down movement of the waves is intense. The height of the waves is detected and synchronized up and down by a motor or the like.

[0044] <Induction part (0401): Embodiment 1: Mainly corresponding to Claim 3>

[0045] The floating pumice intake structure of this embodiment having an induction part is shown in Fig. 4. The induction part is similar to the silt fence described later in terms of its role, but the difference from the silt fence is that it guides floating objects such as floating pumice to the suction opening of the floating pumice intake structure by physical force. An example of the force used as the physical force is a jet flow of seawater or the like. However, it is not limited to this, and it may be something like a waterwheel provided in front of the suction opening and sending floating objects to the suction opening with its blades, or something like a shovel of an excavator sending floating objects into the suction opening. Since the induction part physically forces floating objects such as pumice to be sent into the suction opening, in addition to the suction force of the pumice suction port, the force for sending floating objects and floating matter into the suction opening becomes stronger, and it is possible to efficiently take in floating pumice and the like drifting into the suction opening.

[0046] When using the jet flow (0404) shown in Fig. 4, for example, high-pressure seawater is sent from a jet seawater pump arranged in seawater to a jet nozzle (0403) via a high-pressure hose (0402), and the jet flow (0404) is jetted from the jet nozzle toward the suction opening (0405). The jet nozzle is arranged at a position approximately the same as or lower than the depth of the floating objects such as floating pumice below the water surface so as not to obstruct the waterway for the floating objects such as floating pumice to reach the suction opening, and it is preferably configured to jet the jet flow toward the suction opening obliquely upward to create a flow in the area of the sea surface where floating pumice and the like exist.

[0047] Incidentally, it is preferable that there are a plurality of jet nozzles that emit jet streams. This is because it is necessary to create a flow in a band shape with a width corresponding to the width of the suction opening. Also, the jet nozzles may be arranged in a fan shape so as to converge toward the suction opening. This is because floating debris such as pumice can be concentrated from a wider area toward the suction opening. The distance between the tip position of the jet nozzle and the suction opening is preferably about 20 centimeters to 1 meter. It is preferable to increase the distance as the size of the floating debris increases. At least the distance needs to be larger than the average size of the floating debris.

[0048] <Embodiment 2>

[0049] <Summary and Configuration of Embodiment 2>

[0050] Embodiment 2 is a floating pumice removal device. The floating pumice removal device is a device that includes, as part of its configuration, the floating pumice intake structure described in any of Embodiments 1, and in addition to the floating pumice intake structure, includes one or more of a forced movement device, a suction device, a float device, a silt fence, and a sieve device.

[0051] <Forced Movement Device (0702): Embodiment 2: Mainly Corresponding to Claim 5>

[0052] FIG. 7 shows a floating pumice removal device including a forced movement device (0702) and a floating pumice intake structure described in any of Embodiments 1. There is a guiding portion described in Embodiment 1 having a configuration similar to that of the forced movement device. The guiding portion uses physical force in front of the suction opening of the floating pumice intake structure to send floating debris to the suction opening, but the forced movement device of this embodiment is a device for sending floating debris such as pumice from a sufficiently upstream side of the suction opening to the suction opening side. Various forced movement devices are conceivable, and a typical example is a ship equipped with a water cannon. The water cannon is configured to concentrate floating debris on a floating pumice intake structure located in front. Also, when using a silt fence described later, it is conceivable to forcibly move floating pumice etc. with a forced movement device such as a water cannon from outside the area of the silt fence toward the area of the silt fence.

[0053] In addition, a configuration in which an oil fence or a silt fence is used to create a wall on the sea surface and draw it toward the land side can also be considered. It is also conceivable to use a floating ground dragnet to draw floating substances such as pumice toward the land side. When using a fishing net, it is also conceivable to fix the ends of the fishing net with two fishing boats and pull them toward the intake structure for drifting pumice and the like. At that time, the silt fence described later may be stretched in a V shape toward the suction opening of the intake structure for drifting pumice and the like, and the fishing boat may move the fishing net stretched from the outside to the inside of the silt fence toward the shore.

[0054] <Suction device (0703a, 0703b or 0502, 0503): Embodiment 2: Mainly corresponding to Claim 6 and Claim 8>

[0055] FIG. 5 and FIG. 7 are diagrams including a drift pumice removal device including a suction device and a drift pumice intake structure according to any one of Embodiments 1. Among floating substances, pumice and plastic objects may damage the structure of the pump if a method of directly passing them through the pump and sucking them is adopted. Therefore, it is appropriate to send pumice and the like, which are the substances to be sucked, to post-treatment using an ejector without directly passing them through the pump. Therefore, the suction device of the present embodiment includes an ejector for sucking pumice and the like from a pumice suction port and a drive fluid pump for driving the ejector. As the drive fluid, seawater, lake water, river water, etc. on which floating substances float are used. It is also conceivable to reuse seawater and the like separated from pumice and the like by a sieve device described later.

[0056] The suction device described in Claim 6 is combined with the drift pumice intake structure according to any one of Embodiments 1, while the suction device described in Claim 8 is added to the drift pumice removal device according to Claim 5 or Claim 7. That is, it is either a drift pumice removal device including a drift pumice intake structure according to any one of Embodiments 1, a forced movement device, and a suction device, or a drift pumice removal device including a drift pumice intake structure according to any one of Embodiments 1, a float device described later, and a suction device.

[0057] <Float device (0301, 0504, 0603 or 0704): Embodiment 2: Mainly corresponding to claim 7>

[0058] The "float device (also called a pontoon float)" has a support part for supporting a drift pumice intake structure and its accessories, and is for floating on the water surface. The depth maintaining part, guiding part, and adjusting means of the depth maintaining part in Embodiment 1 are supported and installed on this float device. The float device only needs to have buoyancy, and it may be a simple plastic block, or it may be a boat, raft, or ship. It may also be provided with propulsion force. Further, it is preferably provided with fixing means for fixing to the coast, quay wall, seabed, water bottom, etc.

[0059] It is preferable to fix it to a land side fixture with a metal rod or rope, or to configure it to be fixed to the seabed by dropping an anchor. Further, if necessary, it is preferably provided with silt fence fixing means for fixing the silt fence described later. The silt fence fixing means preferably functions so that the silt fence is connected to the left and right of the opening of the suction opening.

[0060] <Silt fence (0705): Embodiment 2: Mainly corresponding to claim 9>

[0061] The "silt fence" is arranged so as to guide drift pumice etc. toward the suction opening of the drift pumice intake structure. This is to enable pumice etc. to be removed at as high a yield as possible. Further, the above-mentioned forced movement device may be configured to forcibly move pumice etc. in the area surrounded by the silt fence and to act.

[0062] <Sieve device (0705): Embodiment 2: Mainly corresponding to claim 9>

[0063] The "sieve device" has a function of separating pumice stones and the like that are sucked by a suction device and conveyed by a conveying pipe together with seawater or the like connected to a suction opening from the seawater or the like. A part of the seawater separated as described above may be configured to be reused as an ejector driving fluid. Note that the pumice stones and the like separated from seawater or the like by the sieve device can be configured to be dropped into a vessel and carried out by batch processing. The vessel itself may be of an exchangeable type.

[0064] <Embodiment 3>

[0065] <Outline of Embodiment 3>

[0066] This embodiment relates to a method for removing floating pumice stones and the like.

[0067] First, it is a method for removing floating pumice stones and the like, including a step of removing floating pumice stones and the like floating on the sea using one or more floating pumice stone intake port structures of Embodiment 1. When using a depth control unit, for example, a dust-collecting type floating pumice stone intake port structure, while maintaining the part corresponding to the bottom plate at a position sufficiently deeper than the depth of the floating pumice stones and the like below the water surface, it is guided to the sieve by the suction force of an ejector or the like connected to the pumice stone suction port, separated from seawater or the like, and then stored in a vessel. The vessel is preferably an exchangeable portable type. When the vessel is full of pumice stones and the like, it is exchanged with a replacement vessel, and the full vessel is transported to a pumice stone and the like processing site by a transport vehicle.

[0068] Second, a method for removing floating pumice stones or the like, which includes a step of removing floating pumice stones or the like floating on the sea using any one or more of the floating pumice stone intake port structures of Embodiment 1, and includes a step of removing the pumice stones or the like while maintaining the upper surface of the depth regulating portion of the floating pumice stone intake port structure below the underwater depth of the pumice stones or the like floating on the sea. Since the underwater depth of the pumice stones or the like may vary, the floating pumice stones or the like are removed while appropriately changing the depth of the depth regulating portion while constantly monitoring the underwater depth of the pumice stones or the like by image analysis or the like. As a method of constant monitoring, in addition to image analysis using a camera, there is also a method of using a laser sensor. The method of using a laser sensor is, for example, to install a plurality of laser light sources in the depth direction at intervals of 1 cm and a light receiving sensor for receiving the laser light from the laser light source in front of the suction opening, and measure and judge at what depth the laser light is blocked.

[0069] Third, a method for removing floating pumice stones or the like, which includes a step of removing floating pumice stones or the like floating on the sea using any one or more of the floating pumice stone intake port structures of Embodiment 1, and further includes a step of arranging silt fences so that the interval gradually narrows toward the suction opening of the floating pumice stone intake port structure. It is a method for removing floating pumice stones or the like that can be configured to be implemented simultaneously with the first and second forms of this embodiment.

Explanation of Reference Numerals

[0070] 0101 Depth regulating portion 0102 Opening regulating portion 0103 Suction opening 0104 Pumice stone suction port 0105 Floating pumice stone intake port structure 0301 Float (barge float) 0302 Position for installing the floating pumice stone intake port structure with respect to the float 0112 Consumption amount acquisition rule holding portion 0401 Jet flow nozzle structure 0402 Pipe for sending high-pressure seawater to the jet flow nozzle 0403 Jet flow nozzle 0404 Jet flow 0405 Suction opening towards the jet flow 0501 Overall view of the floating pumice removal device 0502 Ejector 0503 Driving pump for the ejector driving fluid 0504 Combined float 0601 Up-and-down winding pipe for moving the floating pumice intake structure (depth control part) up and down 0602 Winding winch for moving the up-and-down winding pipe up and down 0603 Float (barge float) 0604 Floating pumice intake structure 0605 Winding rope 0701 Floating pumice removal device (floating pumice dredging device) 0702 Forced movement device (e.g., drainage pump, fence, net, fishing boat, etc.) 0703 Suction device (ejector + driving pump for ejector driving fluid + power supply, etc.) 0704 Float (barge float) 0705 Silt fence 0706 Sieving device

Claims

1. A depth control unit for regulating the suction water depth, An opening width control unit that forms the suction opening described later in front together with the depth control unit, and is composed of one opening width control unit and another opening width control unit whose respective tips are each connected to a silt fence, and regulates the width between the one opening width control unit and the other opening width control unit Or / and an opening width control unit that regulates the suction water surface opening width by regulating the angle formed by the one opening width control unit and the other opening width control unit, A suction opening formed in front by the depth control unit, one opening width control unit, and the other opening width control unit of the opening width control unit, An opening that appears at the rearmost end of the box body by a lid portion spanned over a box body formed by the depth control unit and one opening width control unit and the other opening width control unit of the opening width control unit whose opening width is gradually narrowed, and a floating matter suction port continuously provided at the opening, Comprising, The depth control unit is a floating matter intake port structure in the form of a plate to be spanned between one opening width control unit and the other opening width control unit of the opening width control unit.

2. The floating matter intake port structure according to claim 1, further comprising a depth maintenance unit for maintaining the depth control unit of the floating matter intake port structure at a predetermined position below the water surface.

3. The floating matter intake port structure according to claim 1 or claim 2, further comprising a guiding unit provided in front of the suction opening for guiding floating matter to the suction opening.

4. The floating matter intake port structure according to claim 2 or claim 3, wherein the depth maintenance unit has an adjusting means for adjusting the depth control unit in the vertical direction.

5. A floating matter removal device comprising the floating matter intake port structure according to any one of claims 1 to 4, And a forced movement device for forcibly moving floating matter toward the suction opening of the floating matter intake port structure.

6. A floating matter removal device comprising the floating matter intake port structure according to any one of claims 1 to 4, A suction device, An ejector for sucking floating matter from the floating matter suction port, And a suction device comprising a drive fluid pump for driving the ejector.

7. A floating matter removal device comprising the floating matter intake port structure according to any one of claims 1 to 4, A float device for floating on the water surface, And a float device having a support portion for supporting the floating matter intake port structure.

8. A suction device, An ejector for sucking floating matter from the floating matter suction port, The floating matter removing device according to claim 5 or claim 7, further comprising a suction device comprising a driving fluid pump for driving an ejector.

9. The floating matter removing device according to any one of claims 5 to 8, further comprising a silt fence arranged to guide floating matter toward a suction opening of a floating matter intake structure.

10. The floating matter removing device according to any one of claims 5 to 9, further comprising a sieving device for separating the suctioned floating matter from any one of seawater, river water, and lake water.

11. A method for removing floating matter, comprising the step of removing floating matter floating on the sea using the floating matter intake structure according to any one of claims 1 to 4.

12. The method for removing floating matter according to claim 11, comprising the step of removing the upper surface of the depth regulating portion of the floating matter intake structure according to any one of claims 1 to 4 below the underwater depth of the floating matter floating on the sea.

13. The method for removing floating matter according to claim 11 or claim 12, further comprising the step of arranging a silt fence such that the distance gradually narrows toward the suction opening of the floating matter intake structure according to any one of claims 1 to 4.

Images