Ventilation device for a ship

Abstract

The present invention relates to a ventilation device for a ship, comprising: a hatch frame in which a passage is formed inside; a hatch cover which is rotated by being hingedly coupled to one side of the hatch frame through a hinge coupling part and opens and closes the hatch frame; and a locking part which locks and fixes the hatch cover to the hatch frame, the locking part comprising: a pair of support brackets which are formed protruding from a lower end surface of the hatch frame and have a hollow portion with the same axis formed by perforation; a clamping part which is cylindrical, installed between the support brackets, and is hingedly coupled to the hollow portion in a rotatable manner; a locking box which is installed to the hatch cover; and a lever which is cylindrical, installed in a manner that can be lifted by a certain height in the locking box, and has an inclination formed on one side surface in order to be clamped to or detached from the clamping part.

Description

Technical Field

[0001] This invention relates to a marine ventilation device that minimizes friction and resistance during the opening and closing of the locking part of a marine ventilation device, thereby preventing corrosion and rust in the locking part and extending its service life. Background Technology

[0002] Generally speaking, cargo holds formed on a ship are spaces for loading cargo. As mentioned above, air holes are formed in the cargo holds so that ventilation can be performed according to the characteristics of the cargo loaded inside. Ventilation devices (or air vents) for opening and closing the holes formed in the cargo holds can also be installed.

[0003] For the ventilation device described above, it is required that it can be easily opened and closed as needed. Moreover, since it is a device installed on a ship, it is required to ensure its watertightness when closed to prevent seawater from seeping into its interior.

[0004] Furthermore, because the ventilation system is a heavy-duty device, it is a structure that can be easily closed by its own weight when it is open without being subjected to additional external force. Therefore, it requires a lot of force to open, and conversely, it may rotate rapidly due to its own weight when performing the closing action, which may lead to an accident.

[0005] As a prior art related to the ventilation device described above, Korean Patent Publication No. 10-2023-0122697 (hereinafter referred to as the "prior art") has been published.

[0006] The prior art relates to a hatch device for ship ventilation, comprising: a hatch frame portion 10 having a channel formed therein; a hatch cover portion 20, which rotates by being hinged to one side of the hatch frame portion 10 to cover the hatch frame portion 10; a guide portion 30, which is connected to the hatch frame portion 10 on one side and to the hatch cover portion 20 on the other side, thereby rotating in a manner corresponding to the opening and closing action of the hatch cover portion 20; and a locking portion 40, which is provided on one side of the hatch cover portion 20 to securely fix the hatch cover portion 20 to the hatch frame portion 10.

[0007] However, the locking structure of the ventilation device as described above is as follows: Figure 10 As shown, there is a structure in which an angular snap-fit ​​part and an angular rod snap-fit ​​and lock together. In the case described above, the snap-fit ​​part and the rod form a surface contact with each other, so the friction and resistance are relatively large. Moreover, during the process of the rod being raised and lowered, wear will occur on the contact surface of the snap-fit ​​part and the contact surface of the rod as a whole.

[0008] Furthermore, because the contact surface between the locking part and the rod is a specific surface for locking and fixing, wear will only occur on that specific surface during long-term use, causing the locking position between the locking part and the rod to deviate. This results in the ventilation device failing to achieve proper sealing and seawater seeping into the ship.

[0009] Furthermore, as mentioned above, the wear occurring on the locking part and the rod can lead to corrosion and rust due to the salt in seawater, causing the rod to be unable to rise or fall smoothly. Moreover, forcibly opening or closing the rod that cannot rise or fall smoothly may cause safety accidents. In addition, there is the problem of shortening the replacement cycle of the locking part and the ventilation device.

[0010] Therefore, there is an urgent need for a marine ventilation device that minimizes friction and resistance during the opening and closing of the locking part of the device, thereby preventing corrosion and rust in the locking part and extending its service life.

[0011] Prior technology documents

[0012] Patent documents

[0013] (Patent Document 1) Korean Patent Publication No. 10-2023-0122697 (August 22, 2023) Summary of the Invention

[0014] The problem that the invention aims to solve

[0015] The present invention aims to solve the problems described above, and its purpose is to provide a marine ventilation device that minimizes friction and resistance during the opening and closing of the locking part of the device during the installation process, thereby preventing corrosion and rust in the locking part and extending its service life.

[0016] Furthermore, another object of the present invention is to provide a locking part of a marine ventilation device that is formed in the shape of a round bar and installed in a manner in which it can be rotated with respect to the installed shaft using a bushing or bearing, so that when the rod of the locking part contacts the locking part, the rod is locked into or disengaged from the locking part while the locking part is rotating, thereby minimizing the friction and resistance between the rod and the locking part.

[0017] Furthermore, another object of the present invention is to provide a marine ventilation device that improves watertightness by incorporating silicone rubber on the surface in contact with the hatch cover and the hatch frame in order to meet the IP55 standard disclosed in KS C IEC 60529.

[0018] Solution for solving the problem

[0019] To achieve the aforementioned objectives, the marine ventilation device of the present invention is characterized by comprising: a hatch frame having a channel formed therein; a hatch cover that rotates and opens / closes the hatch frame by means of a hinged connection with one side of the hatch frame; and a locking part that locks and secures the hatch cover to the hatch frame; the locking part comprising: a pair of support brackets protruding from the lower end face of the hatch frame and having a hollow portion with a coaxial axis formed by perforation; a cylindrical locking part installed between the support brackets and rotatably axially connected to the hollow portion; a locking box installed on the hatch cover; and a cylindrical rod installed in a manner that allows it to be raised and lowered within the locking box, and having an inclination on one side for being locked into or detached from the locking part.

[0020] Furthermore, the present invention is characterized in that a bushing is also installed on the hollow portion formed in the support bracket, and the snap-fit ​​portion is supported by the bushing.

[0021] Furthermore, the present invention is characterized in that a bearing is also installed on the hollow portion formed in the support bracket, and the snap-fit ​​portion is supported by the bearing.

[0022] Furthermore, the present invention is characterized in that: the hatch cover is fitted with silicone rubber on the back side that contacts the hatch frame, thereby preventing the penetration of seawater or dust and absorbing impacts by closing it.

[0023] Furthermore, the present invention is characterized in that: pin holes are machined at both ends of the snap-fit ​​portion along the vertical direction of the axis at the end ends, and the snap-fit ​​portion is prevented from disengaging by fastening the connecting pin to the pin holes.

[0024] Furthermore, the present invention is characterized in that: the two ends of the snap-fit ​​portion are respectively machined into threads or grooves along a certain length direction from the end ends, and the snap-fit ​​portion is prevented from disengaging by fastening the nut into the machined threads or fastening the snap ring into the machined grooves.

[0025] Furthermore, the present invention is characterized in that a torsion spring for generating tension is also provided in the hinge joint, and the hatch cover is opened by means of the tension generated by the torsion spring.

[0026] Furthermore, the present invention is characterized by further comprising: a cover support, one end of which is connected to a side of the hatch frame and the other end of which is connected to a side of the hatch cover, thereby rotating in a manner associated with the opening and closing action of the hatch cover.

[0027] Furthermore, the present invention is characterized in that: in the cover support portion, at least two or more linkage units are connected to each other by means of a connecting shaft, thereby performing joint movements with the connecting shaft as a reference.

[0028] Invention Effects

[0029] The present invention has the effect of minimizing friction and resistance generated during the opening and closing of the locking part of the ventilation device installed on a ship during the opening and closing process, thereby preventing corrosion and rust in the locking part and extending its service life.

[0030] Furthermore, it has a locking part formed in the shape of a round bar and installed on the locking part of the marine ventilation device. It is installed in a way that can be rotated with respect to the shaft on which it is installed, such as by means of a bushing or a bearing. When the rod of the locking part contacts the locking part, the rod is locked into or disengaged from the locking part while the locking part is rotating, thereby minimizing the friction and resistance between the rod and the locking part.

[0031] In addition, it has the effect of improving watertightness by incorporating silicone rubber on the surface of the hatch cover that contacts the hatch frame in order to meet the IP55 standard disclosed in KS C IEC 60529. Attached Figure Description

[0032] Figure 1 This is a perspective view of a marine ventilation device according to one embodiment of the present invention.

[0033] Figure 2 This is a side view of a marine ventilation device according to one embodiment of the present invention.

[0034] Figure 3 This is a front view of a marine ventilation device according to one embodiment of the present invention.

[0035] Figure 4 This is an example diagram illustrating the opening and closing of a marine ventilation device according to one embodiment of the present invention.

[0036] Figure 5 This is an example diagram of the back of the hatch cover of a marine ventilation device according to one embodiment of the present invention.

[0037] Figure 6 This is an example of a marine ventilation device according to one embodiment of the present invention. Figure 1 .

[0038] Figure 7 This is one embodiment of the present invention. Figure 6 Cross-sectional view of the snap-fit ​​part.

[0039] Figure 8 This is an example of a marine ventilation device according to one embodiment of the present invention. Figure 2 .

[0040] Figure 9 This is one embodiment of the present invention. Figure 8 Cross-sectional view of the snap-fit ​​part.

[0041] Figure 10 This is an example diagram of the locking part of an existing ventilation device.

[0042] Explanation of reference numerals in the attached figures

[0043] 1: Marine ventilation system

[0044] 10: Hatch frame

[0045] 20: Hatch cover

[0046] 21: Silicone rubber

[0047] 30: Hinge joint

[0048] 31: First joint

[0049] 32: Second joint

[0050] 33: Torsion spring

[0051] 40: Cover support section

[0052] 41: First Link Unit

[0053] 42: Second Link Unit

[0054] 421: Rotation limiting plate

[0055] 43: Connecting shaft

[0056] 50: Locking section

[0057] 51: Support bracket

[0058] 511: Hollow Section

[0059] 512: Bushing

[0060] 513: Bearing

[0061] 52: Connector

[0062] 525: Snap ring

[0063] 528: Pressing plate

[0064] 53: Locked Box

[0065] 54: Pole

[0066] 60: Handle. Detailed Implementation

[0067] Next, a preferred embodiment of the marine ventilation device of the present invention will be described in detail with reference to the accompanying drawings.

[0068] The terminology used herein is not intended to limit the technology described herein to a particular implementation, but should preferably be understood to include various modifications, equivalents, and alternatives to the corresponding embodiments.

[0069] The terms such as “first” or “second” used in describing this invention are merely for distinguishing one constituent element from other constituent elements of similar form, and the scope of the claims is not limited by the use of the terms as described above.

[0070] In describing this invention, unless otherwise expressly indicated, the expression "A or B" may be understood as selectively using one of A and B, but preferably should be understood as using both A and B simultaneously.

[0071] The accompanying drawings used in describing this invention may exaggerate or omit certain details in order to make it easy to grasp the features of the invention, but this is not intended to limit any particular embodiment of the invention.

[0072] Furthermore, it should be understood that when a specific direction (up, down, left, right, vertical, horizontal, inner, outer, etc.) is specified in the description of this invention, such description is only for the purpose of illustrative purposes and to aid understanding, and is not intended to limit or constrain a specific configuration or specific implementation.

[0073] like Figures 1 to 4 As shown, the marine ventilation device 1 of the present invention includes: a hatch frame 10 having a channel formed inside; a hatch cover 20 that rotates and opens and closes the hatch frame 10 by means of a hinge connection 30 connected to a hinge on one side of the hatch frame 10; and a locking part 50 that locks and fixes the hatch cover 20 to the hatch frame 10.

[0074] The locking part 50 includes: a pair of support brackets 51 protruding from the lower end face of the hatch frame 10 and forming a hollow part 511 with the same axis through holes; a snap-fit ​​part 52, cylindrical in shape, installed between the support brackets 51 and rotatably coupled to the hollow part 511; a locking box 53 installed on the hatch cover 20; and a rod 54, cylindrical in shape, installed in a way that can be raised and lowered to a certain height within the locking box 53, and inclined on one side so as to be snapped into or detached from the snap-fit ​​part 52.

[0075] To facilitate the implementation of this invention, the configuration of the ship ventilation device 1 will be described in more detail with reference to the accompanying drawings.

[0076] First, the hatch frame 10 is a tunnel-shaped structure installed on one side of the wall or ceiling of the ship, which connects the interior and exterior of the ship.

[0077] It should be understood that in the embodiments of the present invention, the hatch frame 10 is formed by a tunnel with a rectangular space, but it is not limited to this. It can also be formed by a tunnel with a space having a shape such as a circle, depending on the user's needs and uses.

[0078] The hatch cover 20 is configured to correspond to the shape of the hatch frame 10. It is hinged to one side of the hatch frame 10 and rotates to perform actions such as closing it to prevent seawater or dust from flowing into the interior side through the hatch frame 10, or opening it to allow air to circulate through the hatch frame 10.

[0079] At this time, the hatch cover 20 is as follows Figure 5 As shown, the watertightness when closed can be improved by installing silicone rubber on the back side that contacts the hatch frame 10, thereby preventing the penetration of seawater or dust, and also absorbing the impact caused by the collision with the hatch frame 10 during the opening and closing of the hatch cover 20.

[0080] Preferably, the installation of the silicone rubber 21 as described above is basically carried out by forcibly embedding the cured silicone rubber 21 into the groove provided on the back of the hatch cover 20. However, when the groove provided on the back is of a complex shape or exists in a position where it is difficult to forcibly embed, it can also be installed by applying an adhesive to the back of the groove and injecting liquid silicone rubber (LSR, Liquid-Silicone-Rubber) into the groove coated with adhesive and then performing heat curing.

[0081] In addition, a "┏┓" shaped handle 60 may be provided on the front of the hatch cover 20 so that the operator can open it by hand. The handle 60 may also be provided with a concave-convex shape corresponding to the fingers or with anti-slip components such as rubber bushings so that the operator can hold it by hand.

[0082] The hinge joint 30 is a configuration that connects the hatch frame 10 and the hatch cover 20 and allows the hatch cover 20 to rotate. It consists of a first joint 31 fixedly installed on the hatch frame 10 and a second joint 32 installed on the hatch cover 20 and composed of a pair of plates installed at positions corresponding to the first joint 31. The two parts are connected by a shaft, so that they can rotate around the shaft.

[0083] A torsion spring 33 is wound on the shaft, and the two ends of the torsion spring 33 are respectively engaged in grooves formed on the plate of the second joint 32. The middle section of the torsion spring 33 is engaged in grooves formed on the first joint 31 to generate tension.

[0084] That is, a torsion spring 33 for generating tension is also provided on the hinge joint 30 of the marine ventilation device 1 of the present invention. In order to allow the hatch cover 20 to be opened by means of the tension and elasticity generated by the torsion spring 33, the torsion spring 33 is compressed when the hatch cover 20 is closed, and at the moment the hatch cover 20 is opened, a force (tension and elasticity) is applied to the front of the hatch cover 20 by means of the rebound effect of the compressed torsion spring 33.

[0085] Furthermore, the torsion spring 33 described above should be understood as a support component that can maintain the hatch cover 20 at a certain angle of opening even when the hatch cover 20 is subjected to a force in the closing direction due to its own weight or when the force of opening the hatch cover 20 is released. It can also function as the rotation limiting piece 421 described later in order to prevent the hatch cover 20 from opening beyond a certain angle.

[0086] The cover support 40 is configured to prevent the hatch frame 10 from closing due to the weight of the hatch cover 20 when the hatch cover 20 is opened, and to prevent the hinge joint 30 from bending or twisting by dispersing the impact applied to the sides of the hatch frame 10 and the hatch cover 20. One end is connected to one side of the hatch frame 10 and the other end is connected to one side of the hatch cover 20, thereby performing a rotational action in a manner associated with the opening and closing action of the hatch cover 20.

[0087] The cover support 40 as described above includes: a first linkage unit 41, one side of which is rotatably connected to the hatch frame 10, and the other side of which is connected to the other side of a second linkage unit 42 via a connecting shaft 43; and a second linkage unit 42, one side of which is rotatably connected to the hatch cover 20, and the other side of which is connected to the other side of the first linkage unit 41 via a connecting shaft 43.

[0088] That is, in the cover support 40, at least two or more linkage units 41, 42 are connected to each other by means of a connecting shaft 43, and one side of each linkage unit 41, 42 is connected to the hatch frame 10 and the hatch cover 20 respectively, so that when rotating in a manner associated with the opening and closing action of the hatch cover 20, the joint movement is performed with reference to the connecting shaft 43.

[0089] In addition, a rotation limiting piece 421 protruding to one side of the link unit 42 is installed on the second link unit 42, which can limit the rotation angle between the first link unit 41 and the second link unit 42. It can also distribute the weight of the hatch cover 20 when the hatch cover 20 is opened, and prevent the hatch frame 10 from being closed by the hatch cover 20 by supporting it.

[0090] The rotation limiting plate 421 described above is not necessarily formed on the second link unit 42. In cases where the installation space is narrow or interference may occur between the link units, it may also be formed on one side of the first link unit 41 or protrude from the side of the hatch frame 10.

[0091] like Figure 4 As shown, by means of the combination of the above-described configuration, the state in which the first linkage unit 41 and the second linkage unit 42 are in a straight line with each other will be restricted to the maximum open state of the hatch cover 20. However, if the state in which the first linkage unit 41 and the second linkage unit 42 are in a straight line with each other is restricted to the maximum angle (θ), the hatch cover 20 may be easily closed due to its own weight. Therefore, by means of the configuration of the rotation limiting plate 421 described above, the maximum angle (θ) formed by the first linkage unit 41 and the second linkage unit 42 when the hatch cover 20 is opened should be restricted to more than 180°.

[0092] That is, preferably, when the angle formed by the first link unit 41 and the second link unit 42 reaches the maximum angle (θ), the hatch frame 10, the hatch cover 20, the first link unit 41 and the second link unit 42 form a rectangular or even rhomboid support structure, thereby dispersing the weight of the hatch cover 20 and supporting it with the rotation limiting plate 421 and the connecting shaft 43.

[0093] Specifically, preferably, the rotation limiting plate 421 is formed with a maximum angle (θ) of 181 to 195° formed by the first link unit 41 and the second link unit 42. This is because if the maximum angle (θ) is less than 181°, the weight of the hatch cover 20 will cause the first link unit 41 and the second link unit 42 to easily fold and close with the connecting shaft 43 as the reference. If the maximum angle (θ) exceeds 195°, the space opened by the hatch cover 20 will become narrow, and ventilation will not be able to be achieved smoothly when the hatch cover 20 is opened. Moreover, the rotation limiting plate 421 may be easily damaged due to the increased force applied to it. Therefore, it is most ideal to form the rotation limiting plate 421 with a maximum angle (θ) of 181 to 195° formed by the first link unit 41 and the second link unit 42.

[0094] The locking part 50, as described above, includes: a pair of support brackets 51 protruding from the lower end face of the hatch frame 10 and forming a hollow part 511 with the same axis through holes; a snap-fit ​​part 52, cylindrical in shape, installed between the support brackets 51 and axially connected to the hollow part 511; a locking box 53 installed on the hatch cover 20; and a rod 54, cylindrical in shape, installed in a manner that allows it to be raised and lowered within the locking box 53, and inclined on one side so as to be snapped into or detached from the snap-fit ​​part 52.

[0095] The support bracket 51 is composed of a pair of plates that protrude from the lower end face of the hatch frame 10 and extend toward the front side of the hatch cover, with each plate spaced apart from the other.

[0096] The snap-fit ​​part 52 is a cylindrical bar installed between a pair of spaced-apart support brackets 51. It can be fixed or installed between the support brackets 51 by methods such as welding. However, as described later, it can also be installed in a rotatable manner by being embedded in a hollow part 511 formed by perforation in the support bracket 51.

[0097] The locking box 53 is a box-shaped structure formed on the front of the hatch cover 20. It includes a box part with an internal space that can be opened and closed independently, and a cover part that can be opened and closed on the upper part of the box part. Holes that pass through on the same axis are formed in the box part and the cover part, so that the rod 54, which will be described later, can be inserted.

[0098] In order to allow the rod 54 to be raised and lowered during the operation of opening the hatch cover 20 and to automatically enter a lowering state when the force driving the rod 54 to rise and fall is released after being released from the latching part 52, a spring is wound on the rod 54, and the lower end of the spring is fixed to a fixing plate formed on the rod 54, while the upper end of the spring is installed to the lower surface of the rod bushing installed in the hole of the cover part located on the upper part of the lock box 53. Thus, when the fixing plate rises and falls together with the rod 54, the spring located between the fixing plate and the rod bushing where the rise and fall occur is compressed and accumulates elasticity. When the force applied to the rod 54 is released, the fixing plate is pushed downward by means of the elasticity accumulated in the spring, thereby causing the rod 54 to fall.

[0099] Furthermore, for the lever 54, in order to automatically perform lifting and lowering actions when the lever 54 contacts the locking part 52 during the movement of the hatch cover 20 from front to rear, even without additional operation of the lever 54 when closing the hatch cover 20, an inclined portion is formed on the lower end side of the lever 54 (the rear side in the attached figure). This allows for a movement where, after lifting and lowering along the cylindrical locking part 52 via the inclined portion formed on the lower end of the lever 54, it descends elastically by means of a spring as it passes the cylindrical locking part 52.

[0100] That is, because the locking is achieved by interlocking the horizontal cylindrical latching part 52 and the vertical cylindrical rod 54, it has a point contact structure. With the help of the contact structure described above, the friction and resistance between the latching part 52 and the rod 54 during the opening and closing process can be reduced. This makes it easier for operators to perform opening and closing operations compared to existing surface contact structures. Moreover, with the reduction of friction and resistance between the latching part 52 and the rod 54, the wear phenomenon occurring on the latching part 52 and the rod 54 can be minimized, thereby increasing the service life of the locking part 50.

[0101] Furthermore, in order to maximize the friction and resistance reduction effect between the locking part 52 and the rod 54, the locking part 52 may also be formed in a structure that rotates on the support bracket 51, as illustrated below.

[0102] As an example, such as Figures 6 to 7 As shown, the locking part 50 can be configured such that a bushing 512 is also installed on the hollow portion 511 formed in the support bracket 51, and the snap-fit ​​portion 52 is supported by the bushing 512. In this case, in order to prevent the bushing 512 from detaching from the support bracket 51, it is preferable to insert a retaining ring 525 into a groove machined on the outer peripheral surface of the snap-fit ​​portion 52.

[0103] As another example, such as Figures 8 to 9 As shown, the locking part 50 can be configured such that a bearing 513 is also mounted on the hollow portion 511 formed in the support bracket 51, and the locking part 52 is supported by the bearing 513. In this case, in order to prevent the bearing 513 from detaching from the support bracket 51 and to prevent the internal lubricant from oxidizing due to contact with air, preferably, after the pressing plate 528 is inserted along the axis of the locking part 52, the retaining ring 525 is embedded into the groove machined on the outer peripheral surface of the locking part 52, thereby maintaining the pressing plate 528 in a state of being pressed against the bearing 513 and the support bracket 51.

[0104] That is, the two ends of the snap-fit ​​part 52 can be machined into grooves along a certain length direction from the end ends, and the snap-fit ​​part 52 can be prevented from disengaging by fastening the snap ring 525 into the groove machined on the outer peripheral surface of the snap-fit ​​part 52. It can also prevent the bushing 512 or bearing 513 from disengaging. Moreover, as needed, the two ends of the snap-fit ​​part 52 can be machined into threads along a certain length direction from the end ends, and the snap-fit ​​part 52 can be prevented from disengaging by fastening the nut into the machined threads. It can also prevent the bushing 512 or bearing 513 from disengaging.

[0105] In addition, the two ends of the snap-fit ​​portion 52 can also be prevented from disengaging by machining pin holes at the ends along the vertical direction of the axis and then engaging the pin holes.

[0106] When the latching part 52, which is rotatably installed as described above, comes into contact with the rod 54 as the hatch cover 20 is opened and closed, the latching part 52 will rotate and slide in place as the rod 54 is raised or lowered. This reduces friction and resistance and minimizes surface wear. Moreover, the wear is not concentrated at a specific point of contact, but rather occurs evenly along the outer circumferential surface of the latching part 52. Therefore, the overall service life of the latching part 52 can be improved.

[0107] The foregoing description has been based on the accompanying drawings of the present invention, but it is not limited to the parts described based on the drawings. Rather, various modifications and implementations can be made within the scope of the technical field of the present invention without departing from the spirit of the present invention, based on the parts described based on the drawings.

Claims

1. A ventilation device for ships, characterized in that: As included: The hatch frame (10) has a channel formed inside; the hatch cover (20) rotates and opens and closes the hatch frame (10) by means of a hinge joint (30) connected to a hinge on one side of the hatch frame (10); and the locking part (50) locks and fixes the hatch cover (20) to the hatch frame (10); and the ship ventilation device (1). The locking part (50) includes: A pair of support brackets (51) protrude from the lower end face of the hatch frame (10) and are perforated to form hollow portions (511) with the same axis. The snap-fit ​​part (52) is cylindrical and is installed between the support brackets (51), and is rotatably coupled to the hollow part (511). Locking box (53), installed on the hatch cover (20); and The rod (54) is cylindrical and is installed in such a way that it can be raised and lowered within the locking box (53) at a certain height, and is inclined on one side so that it can be snapped into or detached from the snap-fit ​​part (52).

2. The marine ventilation device according to claim 1, characterized in that: A bushing (512) is also installed on the hollow portion (511) formed in the support bracket (51), and the snap-fit ​​portion (52) is supported by the bushing (512).

3. The marine ventilation device according to claim 1, characterized in that: A bearing (513) is also installed on the hollow portion (511) formed in the support bracket (51), and the snap-fit ​​portion (52) is supported by the bearing (513).

4. The marine ventilation device according to claim 2 or claim 3, characterized in that: The two ends of the snap-fit ​​part (52) are respectively machined into threads or grooves along a certain length direction from the end ends, and the snap-fit ​​part (52) is prevented from detaching by fastening the nut into the machined threads or fastening the snap ring (525) into the machined grooves.

5. The marine ventilation device according to claim 2 or claim 3, characterized in that: The two ends of the snap-fit ​​part (52) are machined with pin holes along the vertical direction of the axis at the end ends, and the snap-fit ​​part (52) is prevented from detaching by fastening the connecting pin to the pin holes.

6. The marine ventilation device according to claim 1, characterized in that: The hatch cover (20). Silicone rubber (21) is installed on the back side that contacts the hatch frame (10), thereby preventing the penetration of seawater or dust by closing and absorbing impact.

7. The marine ventilation device according to claim 1, characterized in that: In the hinge joint (30), It is also equipped with a torsion spring (33) for generating tension, and the hatch cover (20) is opened by means of the tension generated by the torsion spring (33).

8. The marine ventilation device according to claim 1, characterized in that: The ship ventilation device (1) further includes: The cover support (40) is connected at one end to one side of the hatch frame (10) and at the other end to one side of the hatch cover (20), thereby rotating in a manner associated with the opening and closing action of the hatch cover (20).

9. The marine ventilation device according to claim 8, characterized in that: In the cover support (40), At least two or more linkage units (41, 42) are connected to each other by means of a connecting shaft (43) so that when they rotate in a manner associated with the opening and closing action of the hatch cover (20), they perform joint movements with reference to the connecting shaft (43).

Images