Ship having ice debris inflow prevention apparatus

Abstract

A vessel equipped with an ice fragment inflow prevention device according to one embodiment of the present invention comprises: a hull having a bow section and at least one concealed space with an opening formed therein provided on the bottom of the hull; a bottom ice fragment inflow prevention device provided in the concealed space, positioned within the concealed space during a first operation, and having at least a portion of it protrude outward from the hull through the opening during a second operation to block ice fragments broken by the bow section from flowing into the bottom of the hull and to guide the ice fragments toward the side of the hull; and a door unit coupled to the hull having at least one door body that is movably positioned between a first position where the bottom ice fragment inflow prevention device is positioned within the concealed space and a second position where at least a portion of the bottom ice fragment inflow prevention device protrudes outward through the opening.

Description

Technology Field

[0001] The present invention relates to a ship equipped with an ice fragment inflow prevention device, and more specifically, to a ship equipped with an ice fragment inflow prevention device capable of preventing broken ice fragments from entering the bottom of the ship when operating in icy waters. Background Technology

[0002] As the polar regions (Antarctica and the Arctic) are assessed to possess vast amounts of biological and mineral resources as the last remaining unexplored pristine continents on Earth, countries around the world are competitively pouring their efforts into developing these polar regions.

[0003] The polar regions are the only areas on Earth where national interests are guaranteed through scientific research, and they are unique regions where joint development must be pursued through joint research with neighboring countries. Furthermore, as the future is expected to be a time when research related to global environmental change receives significant attention, the polar regions will play the most important role in the study of global environmental change. In addition, countries around the world believe that continuously increasing polar activities, as the only undeveloped and non-polluted regions on Earth, is the only way to guarantee national interests internationally.

[0004] In order to increase activities in polar regions, it is essential to first secure sufficient infrastructure to support them. Furthermore, to establish research infrastructure in polar regions, it is necessary to construct research bases and facilities to secure the ecology and resources of the polar regions. Consequently, there is a need for vessels capable of transporting various supplies and equipment through polar glaciers, and the demand for icebreakers capable of navigating polar regions through glaciers, as well as ice-strengthened vessels capable of protecting ships from the impact of icebergs and drift ice, has increased.

[0005] An icebreaker is a vessel that possesses icebreaking capabilities and can navigate independently in frozen waters such as the Antarctic continent or the Arctic Ocean. Therefore, not only can it navigate under its own power anywhere, including the polar regions, but it also plays a role in leading a fleet of cargo ships to facilitate cargo transport by clearing a route in frozen waters where ordinary ships cannot navigate, or rescuing ships that become trapped in ice while sailing.

[0006] In addition, there are ice-strengthened ships that, unlike icebreakers, do not possess independent icebreaking capabilities but can operate in areas where icebergs and drift ice are scattered by reinforcing the steel plates on the outer hull; these ice-strengthened ships are used as substitutes for icebreakers for limited periods and in sea areas, or they operate in polar regions following the guidance of icebreakers.

[0007] For polar vessels such as icebreakers, icestrikes, and large cargo ships navigating through the polar regions, collisions with ice sheets frequently occur at the bow, and these polar vessels break or icestrike the ice.

[0008] However, ice fragments generated when breaking or icebreaking adhere to the ship's surface below the waterline, specifically the bottom of the hull (ice pile up), significantly increasing resistance. Therefore, it is necessary to reduce operational resistance when operating in icy waters.

[0009] However, for this purpose, ships equipped with heating icebreakers or steam jet icebreakers have been proposed, but these are insufficient for removing ice fragments adhering to the ship's surface below the waterline, i.e., the bottom of the hull, so a new method is required.

[0010] In addition, since polar vessels operate not only in ice seas but also in open waters, such new measures must not increase operational resistance when operating in open waters. Prior art literature

[0011] Republic of Korea Published Patent No. 2012-0053292, May 25, 2012. The problem to be solved

[0012] Accordingly, the technical problem that the present invention aims to solve is to provide a vessel equipped with an ice fragment inflow prevention device that is in a non-operational state during a first operation, for example, when operating in a general sea area, so as not to hinder operational efficiency, but is in an operational state during a second operation, for example, when operating in an ice sea area, so as to prevent broken ice fragments from entering the bottom of the hull and guide the ice fragments toward the side of the vessel, thereby reducing operational impairment during operation in an ice sea area compared to conventional methods. means of solving the problem

[0013] According to one aspect of the present invention, a vessel having a bottom surface having at least one concealed space with an opening formed therein is provided; a bottom surface ice fragment inflow prevention device provided in the concealed space, which is positioned within the concealed space during a first operation and, during a second operation, at least a portion of which protrudes outward from the hull through the opening to block ice fragments broken by the bow from flowing into the bottom surface and guide the ice fragments toward the side of the vessel; and a door unit coupled to the hull having at least one door body that is movably provided between a first position where the bottom surface ice fragment inflow prevention device is positioned within the concealed space and a second position where at least a portion of the bottom surface ice fragment inflow prevention device is positioned outward through the opening.

[0014] The above-described bottom ice fragment inflow prevention device may include: an ice fragment inflow prevention wall that blocks ice fragments broken by the bow from entering the bottom of the ship when at least a portion of it protrudes outward through the opening, thereby guiding the ice fragments toward the side of the ship; and an ice fragment inflow prevention wall driving unit coupled to the ice fragment inflow prevention wall and causing at least a portion of the ice fragment inflow prevention wall to protrude outward.

[0015] The above ice fragment inflow prevention wall is provided with a shape in which the cross-sectional area decreases from the side coupled to the ice fragment inflow prevention wall driving unit toward the leading edge, and the at least one door body may be a pair of door bodies arranged facing each other so as to be able to approach and separate from each other.

[0016] The above door unit further comprises a pair of housings provided on the hull on each side of the opening; and a pair of elastic members each received in the pair of housings and each coupled to the ends of the pair of door bodies to elastically bias the pair of door bodies toward each other, wherein when the ice inflow prevention wall driving unit protrudes at least a part of the ice inflow prevention wall, the pair of door bodies are moved from the first position to the second position by the leading edge of the ice inflow prevention wall, and the ice inflow prevention wall driving unit may include a hydraulic cylinder that moves the ice inflow prevention wall forward and backward.

[0017] The above ice floe inflow prevention wall is rotatably coupled to one side of the hull forming the opening, and the ice floe inflow prevention wall driving unit is a rotary motor that rotates the ice floe inflow prevention wall, and the at least one door body is a door body that is slidably coupled to the other side of the hull forming the opening, and the door unit further includes a door body driving motor that slides the door body, and the first position of the door body is a position retracted from the opening so that the ice floe inflow prevention wall blocks the opening but the ice floe inflow prevention wall can rotate, and the second position of the door body may be a position advanced to block at least a part of the opening after the ice floe inflow prevention wall has rotated.

[0018] The first operation is for operation in a general sea area, and the second operation is for operation in an ice sea area. The bottom ice fragment prevention device may be provided in multiple units symmetrically in the left-right direction from the central axis of the bow, and may be provided in multiple units spaced apart from each other along a line arranged in a wedge shape toward the bow. Effects of the invention

[0019] Embodiments of the present invention can provide a vessel equipped with an ice fragment inflow prevention device, which is in a non-operational state during a first operation, for example, when operating in a general sea area, so as not to interfere with operation efficiency, but is in an operating state during a second operation, for example, when operating in an ice sea area, so as to prevent broken ice fragments from entering the bottom of the hull and guide the ice fragments to the side of the vessel, thereby reducing the impairment of operation during operation in an ice sea area compared to conventional methods. Brief explanation of the drawing

[0020] FIG. 1 is a drawing for explaining the operating state of a ship equipped with an ice floe inflow prevention device according to one embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the main parts of the ice fragment inflow prevention device of the ship of FIG. 1. Figure 3 is a drawing for explaining the operating state of the ice fragment inflow prevention device of Figure 2. FIG. 4 is a schematic cross-sectional view of the main parts of an ice fragment inflow prevention device according to another embodiment of the present invention. Figure 5 is a diagram illustrating the operating state of the ice fragment inflow prevention device of Figure 4. Specific details for implementing the invention

[0021] In order to fully understand the present invention, the operational advantages of the present invention, and the objectives achieved by the implementation of the present invention, reference must be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described therein.

[0022] The present invention will be described in detail below by explaining preferred embodiments of the invention with reference to the attached drawings. Identical reference numerals in each drawing indicate identical components.

[0023] FIG. 1 is a drawing for explaining the operating state of a ship equipped with an ice fragment inflow prevention device according to one embodiment of the present invention, FIG. 2 is a schematic cross-sectional view of the main part of the ice fragment inflow prevention device of FIG. 1, and FIG. 3 is a drawing for explaining the operating state of the ice fragment inflow prevention device of FIG. 2.

[0024] As illustrated in these drawings, the vessel (10) equipped with the ice pile prevention device according to the present embodiment is equipped with a bottom ice pile prevention device (200). When the bottom ice pile prevention device (200) is in operation, it blocks ice piles (20) broken by the bow (110) from entering the bottom (120) and guides the ice piles (20) toward the side of the vessel. As a result, the phenomenon of ice piles (20) sticking to the surface of the vessel below the water surface (ice pile up) can be significantly reduced compared to the conventional method.

[0025] As illustrated in detail in FIG. 1, in this embodiment, a plurality of bottom ice fragment inflow prevention devices (200) are provided symmetrically in the left and right directions from the central axis of the bow section (110). In addition, a plurality of bottom ice fragment inflow prevention devices (200) arranged in the left and right directions are provided spaced apart from each other along a line arranged in a wedge shape toward the bow section (110) to block broken ice fragments (20) from flowing into the bottom of the ship (120) and to guide the ice fragments (20) to both sides of the ship.

[0026] In this embodiment, the ship is an icebreaker and the prevention of ice fragments (20) broken by the bow (110) from entering the bottom surface (120) and the guidance to the side of the ship have been described, but the scope of the present invention is not limited thereto, and the ship may be an ice-strengthened ship or a large cargo ship operating in polar regions, and in this case, the meaning of ice fragments broken by the bow (110) does not mean only the ice fragments that are initially broken by the bow (110), but includes all ice fragments passing through the bow (110).

[0027] In addition, the ice floe inflow prevention device (200) on the bottom of the hull is shown in operation in FIG. 1 when the vessel (10) equipped with the ice floe inflow prevention device according to the present embodiment is operating in a second operation, for example, when operating in an ice sea area; however, when operating in a first operation, for example, when operating in a general sea area, the ice floe inflow prevention device may be placed in a concealed space (130, see FIG. 2 and FIG. 3) and become non-operational.

[0028] Now, referring to FIGS. 1 to 3, a ship (10) equipped with an ice floe inflow prevention device according to the present embodiment comprises a hull (100) forming the frame of the ship, a bottom ice floe inflow prevention device (200) coupled to the hull (100), and a door unit (300) having a door body (310) that changes its position according to the operating and non-operating state of the bottom ice floe inflow prevention device (200).

[0029] First, the hull (100) is provided with a bow section (110). Since the vessel (10) equipped with the ice floe inflow prevention device according to the present embodiment is a vessel capable of operating in polar ice seas as well as general seas, the outer plating of the bow section (110) can be manufactured to be thicker than that of a general vessel.

[0030] A plurality of concealed spaces (130) with openings are provided in the bottom surface (120). A bottom surface ice fragment inflow prevention device (200) is installed in these concealed spaces (130), and these openings may be partially or entirely closed by a door unit (300). In this embodiment, a plurality of concealed spaces (130) are provided in the hull (100) and a bottom surface ice fragment inflow prevention device (200) is installed therein, so a plurality of bottom surface ice fragment inflow prevention devices (200) are provided as a result; however, the scope of the present invention is not limited thereto, and a single concealed space (130) and a single bottom surface ice fragment inflow prevention device (200) installed therein may also be provided.

[0031] The bottom ice fragment inflow prevention device (200) is provided in a concealed space (130). As illustrated in detail in FIG. 2, the bottom ice fragment inflow prevention device (200) is placed within the concealed space (130) during the first operation, for example, when operating in a general sea area, so as not to affect the operating resistance, and during the second operation, for example, when operating in an ice sea area, as illustrated in FIG. 3, at least a part of the bottom ice fragment inflow prevention device (200) protrudes outward from the hull (100) through an opening to guide ice fragments (20) broken by the bow (110) toward the side of the ship and block them from entering the bottom of the ship (120), thereby reducing the operating resistance compared to the conventional method.

[0032] The hull bottom ice fragment inflow prevention device (200) includes an ice fragment inflow prevention wall (210) that blocks ice fragments (20) broken by the bow (110) from flowing into the hull bottom (120) when at least a part of it protrudes outward through an opening, thereby guiding the ice fragments (20) to the side of the hull, and an ice fragment inflow prevention wall driving part (220) that is coupled to the ice fragment inflow prevention wall (210) and causes at least a part of the ice fragment inflow prevention wall (210) to protrude outward.

[0033] In this embodiment, the ice fragment inflow prevention wall (210) may be provided with a shape in which the cross-sectional area becomes smaller as it extends from the side coupled to the ice fragment inflow prevention wall driving unit (220) toward the tip side. However, the scope of the present invention is not limited thereto, and the ice fragment inflow prevention wall (210) may have various shapes.

[0034] And in this embodiment, the ice fragment inflow prevention wall driving unit (220) includes a hydraulic cylinder that moves the ice fragment inflow prevention wall (210) forward and backward.

[0035] With this configuration, when the ice floe inflow prevention wall driving unit (220) advances the ice floe inflow prevention wall (210) forward, at least a portion of the ice floe inflow prevention wall (210) protrudes outward from the outer surface of the hull (100).

[0036] Meanwhile, the door unit (300) is coupled to the hull (100). The door unit (300) comprises a pair of door bodies (310) that are movably positioned between a first position where the bottom ice floe inflow prevention device (200) is positioned within the concealed space (130) and a second position where at least a portion of the bottom ice floe inflow prevention device (200) protrudes outward through an opening, a pair of housings (320) each provided on the hull (100) on both sides of the opening, and a pair of elastic members (330) each received in the pair of housings (320) and coupled to the ends of the pair of door bodies (310) to elastically bias the pair of door bodies (310) toward each other.

[0037] In this embodiment with this configuration, a pair of door bodies (310) are arranged facing each other so as to be able to approach and separate from each other, but at the first position, a pair of elastic members (330) elastically bias the pair of door bodies (310) to bring them closer to each other, thereby maintaining a state of mutual contact or proximity.

[0038] With this configuration, when the ice fragment inflow prevention wall driving unit (220) advances the ice fragment inflow prevention wall (210), a pair of door bodies (310) overcome the elastic force by the leading edge of the ice fragment inflow prevention wall (210) and move from a first position to a second position, and at least a part of the ice fragment inflow prevention wall (210) protrudes outward from the outer surface of the hull (100). At this time, the second position is a state in which a pair of door bodies (310) are in contact with the side of the ice fragment inflow prevention wall (210).

[0039] In this embodiment, when the ice fragment inflow prevention wall (210) is advanced by the ice fragment inflow prevention wall driving unit (220), it overcomes the elastic force of the elastic member (330) and automatically moves a pair of door bodies (310) to a second position. To this end, an inclined surface (312) is formed at the end of a pair of door bodies (310) to form an insertion groove (not shown) into which the tip of the ice fragment inflow prevention wall (210) can be inserted when the pair of door bodies (310) come into contact.

[0040] Meanwhile, when the bottom ice pile prevention device (200) is activated and the ice pile prevention wall (210) protrudes to the outer surface of the hull (100), the ice pile prevention wall (210) deflects ice piles entering the bow (110) and guides them to the side of the hull, thereby blocking them from entering the bottom of the hull (120). As a result, the phenomenon of ice piles (20) sticking to the surface of the ship below the water surface (ice pile up) can be significantly reduced compared to the conventional method.

[0041] Meanwhile, the operation process of a vessel (10) equipped with an ice fragment inflow prevention device according to one embodiment of the present invention is described below.

[0042] First, during the first operation, for example, when operating in a general sea area, the bottom ice floe inflow prevention device (200) is in a non-operational state and is concealed in the concealed space (130). At this time, a pair of door bodies (310) block the opening. By doing so, when operating in a general sea area, the increase in resistance caused by the bottom ice floe inflow prevention device (200) can be prevented, thereby preventing a decrease in operation efficiency.

[0043] Next, during the second operation, for example, when operating in an ice sea area, the bottom ice debris prevention device (200) is activated, and the hydraulic pump is operated to advance the ice debris prevention wall (210) using a hydraulic cylinder. As a result, the ice debris prevention wall (210) protrudes outward from the outer surface of the hull (100) while opening a pair of door bodies (310). At this time, since the side of the ice debris prevention wall (210) has a slanted shape, it overcomes the elastic force of the elastic member (330) that elastically biases the pair of door bodies (310) while advancing, and moves the pair of door bodies (310) to the second position.

[0044] In this way, when the ice fragment inflow prevention wall (210) protrudes outward, as illustrated in detail in FIG. 1, the ice fragments (20) broken by the bow (110) are guided toward the side of the ship and blocked from flowing into the bottom surface (120). By doing so, it is possible to prevent the ice fragments (20) from accumulating on the bottom surface (120) and causing an increase in resistance.

[0045] With a vessel (10) equipped with an ice fragment inflow prevention device as described above, the ice fragment inflow prevention device (200) on the bottom of the hull is in a non-operational state during the first operation, for example, when operating in a general sea area, so as not to hinder the operation efficiency, but during the second operation, for example, when operating in an ice sea area, the ice fragment inflow prevention device (200) on the bottom of the hull is in an operational state so as to prevent broken ice fragments (20) from entering the bottom of the hull (120) and to guide the ice fragments (20) to the side of the vessel, thereby reducing the impairment of operation during operation in an ice sea area compared to the conventional method.

[0046] FIG. 4 is a schematic cross-sectional view of the main part of an ice fragment inflow prevention device according to another embodiment of the present invention, and FIG. 5 is a drawing for explaining the operating state of the ice fragment inflow prevention device of FIG. 4. As shown in these drawings, in this embodiment, unlike the previously described embodiment, the ice fragment inflow prevention wall (210a) is rotatably coupled to one side of the hull (100a) forming an opening.

[0047] And the ice floe inflow prevention wall drive unit (not shown) is a rotation motor that rotates the ice floe inflow prevention wall (210a), and at least one door body (310a) is a door body (310a) that is slidably coupled to the other side of the hull (100a) forming an opening.

[0048] Additionally, the door unit (300a) further includes a door body drive motor (not shown) that slides the door body (310a).

[0049] And the first position of the door body (310a) is a position retracted from the opening so that the ice fragment inflow prevention wall (210a) blocks the opening but the ice fragment inflow prevention wall (210a) can rotate, and the second position of the door body (310a) is a position advanced so that at least a part of the opening is blocked after the ice fragment inflow prevention wall (210a) has rotated. In the first position, the ice fragment inflow prevention wall (210a) can be maintained in position by an elastic body not shown, etc., and in the second position, the door body (310a) can serve to fix the lower surface of the ice fragment inflow prevention wall (210a).

[0050] With this configuration, during the first operation, for example, when operating in a general sea area, the bottom ice floe inflow prevention device (200a) is in a non-operational state and is concealed in the concealed space (130a), as illustrated in detail in FIG. 4. At this time, the door body (310a) is in a position retracted from the opening so that the ice floe inflow prevention wall (210a) can rotate, and the ice floe inflow prevention wall (210a) blocks the opening. As with the above-described embodiment, when operating in a general sea area, the ice floe inflow prevention wall (210a) blocks the opening but does not protrude to the outer surface of the hull (100a), so an increase in resistance caused by the ice floe inflow prevention device can be prevented, thereby preventing a decrease in operation efficiency.

[0051] And when operating for the second time, for example, when operating in an ice sea area, as illustrated in detail in FIG. 5, the bottom ice debris prevention device (200a) is put into an operating state, and the rotation motor rotates the ice debris prevention wall (210a). By doing so, the ice debris prevention wall (210a) protrudes outward from the outer surface of the hull (100a).

[0052] When the ice floe inflow prevention wall (210a) protrudes outward from the outer surface of the hull (100a), the door body drive motor slides the door body (310a) to move it to a second position, which is an advanced position, to block at least a part of the opening. The moved door body (310a) serves to support the lower surface of the ice floe inflow prevention wall (210a).

[0053] As with the previously described embodiment, in this embodiment, when the ice fragment inflow prevention wall (210a) protrudes outward, it guides the ice fragments broken by the bow to the side of the ship and blocks them from flowing into the bottom of the ship. By doing so, it is possible to prevent ice fragments from accumulating on the bottom of the ship and causing an increase in resistance.

[0054] As such, it is obvious to those skilled in the art that the present invention is not limited to the described embodiments and can be modified and varied in various ways without departing from the spirit and scope of the invention. Accordingly, such modifications or variations should be deemed to fall within the scope of the claims of the present invention. Explanation of the symbols

[0055] 10: Vessel equipped with an ice fragment inflow prevention device 100: Hull 110: Bow 120: Bottom 130 : Concealment space 200 : Bottom ice floe prevention device 210: Ice fragment inflow prevention wall 220: Ice fragment inflow prevention wall drive unit 300 : Door unit 310 : Door body 312 : Slope 320 : Housing 330 : Elastic member

Claims

Claim 1 A hull having a bow section and at least one concealed space with an opening formed therein provided on the bottom surface; a bottom surface ice fragment inflow prevention device provided in the concealed space, positioned within the concealed space during a first operation, and having at least a portion of it protrude outward from the hull through the opening during a second operation to block ice fragments broken by the bow section from flowing into the bottom surface and to guide the ice fragments toward the side of the hull; The device comprises at least one door body that is movably arranged between a first position where the bottom ice fragment inflow prevention device is positioned within the concealed space and a second position where at least a portion of the bottom ice fragment inflow prevention device is positioned protruding to the outside through the opening, and includes a door unit coupled to the hull; wherein the bottom ice fragment inflow prevention device includes an ice fragment inflow prevention wall that blocks ice fragments broken by the bow from entering the bottom of the hull when at least a portion of it protrudes to the outside through the opening, thereby guiding the ice fragments toward the side of the hull; and includes an ice fragment inflow prevention wall driving unit coupled to the ice fragment inflow prevention wall and protruding at least a portion of the ice fragment inflow prevention wall outward, wherein the ice fragment inflow prevention wall is provided in a shape in which the cross-sectional area decreases from the side coupled to the ice fragment inflow prevention wall driving unit toward the tip side, and the at least one door body is a pair of door bodies arranged oppositely to allow mutual approach and separation, and the door unit comprises a pair of housings each provided on the hull on both sides of the opening; A ship equipped with an ice inflow prevention device, comprising: a pair of elastic members each accommodated in the pair of housings and each coupled to the ends of the pair of door bodies to elastically bias the pair of door bodies toward each other; wherein when the ice inflow prevention wall driving unit protrudes at least a portion of the ice inflow prevention wall, the pair of door bodies are moved from the first position to the second position by the leading edge of the ice inflow prevention wall; and wherein the ice inflow prevention wall driving unit includes a hydraulic cylinder that moves the ice inflow prevention wall forward and backward. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A hull having a bow section and at least one concealed space with an opening formed therein provided on the bottom surface; a bottom surface ice fragment inflow prevention device provided in the concealed space, positioned within the concealed space during a first operation, and having at least a portion of it protrude outward from the hull through the opening during a second operation to block ice fragments broken by the bow section from flowing into the bottom surface and to guide the ice fragments toward the side of the hull; The device comprises at least one door body that is movably arranged between a first position where the bottom ice fragment inflow prevention device is positioned within the concealed space and a second position where at least a portion of the bottom ice fragment inflow prevention device is positioned protruding to the outside through the opening, and includes a door unit coupled to the hull; wherein the bottom ice fragment inflow prevention device includes an ice fragment inflow prevention wall that blocks ice fragments broken by the bow from entering the bottom of the hull when at least a portion of it protrudes to the outside through the opening, thereby guiding the ice fragments toward the side of the hull; A ship equipped with an ice inflow prevention device, comprising: an ice inflow prevention wall driving unit coupled to the ice inflow prevention wall and protruding at least a portion of the ice inflow prevention wall outward; wherein the ice inflow prevention wall is rotatably coupled to one side of a hull forming the opening, and the ice inflow prevention wall driving unit is a rotary motor that rotates the ice inflow prevention wall; wherein the at least one door body is a door body that is slidably coupled to the other side of a hull forming the opening, and the door unit further comprises a door body driving motor that slides the door body; wherein the first position of the door body is a position retracted from the opening such that the ice inflow prevention wall blocks the opening but the ice inflow prevention wall can rotate, and the second position of the door body is a position advanced to block at least a portion of the opening after the ice inflow prevention wall has rotated. Claim 6 A vessel equipped with an ice floe inflow prevention device according to claim 1 or 5, wherein the first operation is when operating in a general sea area and the second operation is when operating in an ice sea area, and the ice floe inflow prevention device on the bottom of the hull is provided in multiple units symmetrically in the left-right direction from the central axis of the bow section, and is provided in multiple units spaced apart from each other along a line arranged in a wedge shape toward the bow section.

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