Marine hatch cover structure

Abstract

The utility model discloses a marine hatch cover structure which is applied to cover a cabin opening, the cabin opening is communicated with a deck and a lower-layer cabin, the marine hatch cover structure comprises a hatch cover body and two locking assemblies, and the hatch cover body is suitable for being connected to the outer side face, in the first direction, of the deck in an abutting mode and suitable for covering and sealing the cabin opening; the hatch cover main body comprises a carbon fiber panel and a PMI foam plate, and the PMI foam plate is clamped in the carbon fiber panel; the two locking assemblies are oppositely arranged on the hatch cover body in the second direction, and the first direction is perpendicular to the second direction. The locking assembly comprises a first connecting rod rotationally connected to the hatch cover body, the first connecting rod is suitable for penetrating through the cabin opening and is provided with a locking binding head, and the locking binding head has a locking state in which the locking binding head stretches out to abut against the inner side face of the deck and an unlocking state in which the locking binding head retracts to be separated from the inner side face of the deck. According to the hatch cover, the hatch cover main body can be lighter, and the hatch cover has better marine environment corrosion resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of ships, and particularly relates to a marine hatch cover structure. Background Art

[0002] Since ships are in a harsh marine environment, hatch covers are required to protect marine equipment and goods stored in the cabins below the deck. Marine hatch covers are used to provide airtight and watertight sealing protection for the cabin openings connecting the deck and the lower cabins, preventing gases, wind and rain from passing through the cover plates and entering the lower cabins, and protecting marine equipment and goods from moisture and damage.

[0003] However, most of the existing marine hatch covers are heavy, not easy to be manually opened and closed, and have poor corrosion resistance in the marine environment, which is not convenient for ocean use. Therefore, there is an urgent need for a marine hatch cover with a lighter weight and better corrosion resistance in the marine environment. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the heavy weight and poor corrosion resistance of the marine hatch cover structure in the prior art, so as to provide a marine hatch cover structure.

[0005] According to a marine hatch cover structure provided by the utility model, it is applied to cover a cabin opening, and the cabin opening communicates with the deck and the lower cabin. The marine hatch cover structure includes:

[0006] A hatch cover main body, which is adapted to abut against the outer side surface of the deck in the first direction and is adapted to cover and seal the cabin opening; the hatch cover main body includes a carbon fiber panel and a PMI foam board, and the PMI foam board is clamped inside the carbon fiber panel;

[0007] Two locking assemblies, which are arranged oppositely along the second direction on the hatch cover main body, and the first direction and the second direction are perpendicular to each other; the locking assembly includes a first connecting rod rotatably connected to the hatch cover main body, the first connecting rod is adapted to pass through the cabin opening, and is provided with a locking clip, and the locking clip has a locking state in which it extends and abuts against the inner side surface of the deck in the first direction, and an unlocking state in which it retracts and separates from the inner side surface of the deck in the first direction.

[0008] According to a marine hatch cover structure of the utility model, it has at least the following technical effects:

[0009] 1. By setting the hatch cover main body as a carbon fiber panel and sandwiching a PMI foam board inside the carbon fiber panel, compared with the hatch cover main body made of a pure fiber board, in the hatch cover main body of this marine hatch cover structure, the PMI foam board sandwiched inside the carbon fiber panel can improve the overall stiffness of the hatch cover main body, making it more resistant to the impact of ocean waves. Moreover, the weight of the PMI foam board of the same volume is lighter than that of the carbon fiber panel, enabling the hatch cover main body to be more lightweight for manual opening and closing operations. Additionally, the hatch cover main body formed by the combination of the carbon fiber panel and the PMI foam board has good high-temperature and salt spray resistance characteristics. When placed in the marine environment for a long time, it has significantly better corrosion resistance in the marine environment compared with a steel hatch cover.

[0010] 2. Two locking components are arranged oppositely on both sides of the hatch cover main body along the second direction. When it is necessary to cover and seal the cabin opening, the hatch cover main body is abutted against the outer side surface of the deck along the first direction. At this time, the locking head is located in the lower cabin. Subsequently, rotate the locking head forward to extend and abut against the inner side surface of the deck to achieve the covering and sealing of the cabin opening. When it is necessary to open the cabin opening, just rotate the locking head backward to retract and separate from the inner side surface of the deck, and the lightweight marine hatch cover structure as a whole can be removed from the cabin opening. Moreover, the marine hatch cover structure and the deck are separately arranged to facilitate the replacement or repair of the marine hatch cover structure as a whole.

[0011] Preferably, the locking component further includes a first driving handle, and one end of the first connecting rod extending outward along the first direction extends outside the hatch cover main body and is connected to the first driving handle.

[0012] Preferably, there is a first mounting seat at the position of the hatch cover main body corresponding to the first connecting rod. A first through hole is arranged through the first mounting seat along the first direction, and the first connecting rod is rotatably connected in the first through hole through a bushing. A first washer is movably sleeved on the part of the first connecting rod extending outside the hatch cover main body. The first driving handle is movably sleeved on the first connecting rod along the first direction. The first connecting rod is connected with a first limiting member through a first bolt. During assembly, the first limiting member and the first washer respectively abut against the two end faces of the first driving handle along the first direction.

[0013] Preferably, a second through hole is arranged at the position of the hatch cover main body corresponding to the first mounting seat. The second through hole matches the first mounting seat. A positioning ring protrudes from the side wall of the first mounting seat extending outside the second through hole, and the positioning ring is connected to the hatch cover main body through a second bolt.

[0014] Preferably, the locking assembly also includes a second connecting rod, which is rotatably connected to the hatch cover body, and a locking bolt is provided on the second connecting rod. The second connecting rod and the first connecting rod are arranged at intervals along the third direction, and the first connecting rod and the second connecting rod are connected by a driving connecting rod. The first connecting rod and the second connecting rod rotate synchronously under the drive of the driving connecting rod; the first direction, the second direction and the third direction are perpendicular to each other.

[0015] Preferably, it also includes a cover back plate, which is arranged on the inner side of the hatch cover body along the first direction and forms an installation cavity with the clamping area of ​​the hatch cover body, and the driving connecting rod is arranged in the installation cavity; a through groove is arranged on the cover back plate at a position corresponding to the locking trunnion, and the through groove is connected to the installation cavity and is suitable for the locking trunnion to pass through.

[0016] Preferably, one end of the first connecting rod facing away from the first driving handle extends outside the cover back plate and is connected to a second driving handle;

[0017] And / or, the cover back plate is configured as a carbon fiber back plate.

[0018] Preferably, an internal threaded hole is provided on the inner side surface of the hatch cover body along the first direction at a position corresponding to the second connecting rod, a third bolt is internally threadedly connected to the internal threaded hole, and the second connecting rod is rotatably connected to the rod portion of the third bolt.

[0019] Preferably, the hatch cover body is detachably connected to a second mounting seat at a position corresponding to the third bolt, and the internal threaded hole is provided on the second mounting seat.

[0020] Preferably, the cover back plate and the end faces of the hatch cover body facing each other along the first direction are abutted against each other, the part of the first connecting rod extending outside the cover back plate is movably sleeved with a second washer, and the second driving handle is movably sleeved on the first connecting rod along the first direction; a self-locking nut is threadedly connected to the first connecting rod; during assembly, the self-locking nut and the second washer respectively abut against the two end faces of the second driving handle along the first direction, and the other end of the second washer abuts against the cover back plate.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Schematic perspective view of a marine hatch cover structure according to this embodiment;

[0024] Figure 2 Schematic front view of a marine hatch cover structure according to this embodiment;

[0025] Figure 3 is Figure 2 Schematic sectional view taken along line A-A in

[0026] Figure 4 is Figure 3 Enlarged view at position B in

[0027] Figure 5 is Figure 3 Enlarged view at position C in

[0028] Figure 6 Schematic bottom view of a marine hatch cover structure according to this embodiment with the cover back plate removed.

[0029] Explanation of reference numerals:

[0030] 1 - Hatch cover main body, 11 - Carbon fiber panel, 12 - PMI foam board;

[0031] 21 - First connecting rod, 22 - Locking clip, 23 - First driving handle, 24 - Second connecting rod, 25 - Driving link, 26 - Second driving handle, 27 - Third bolt;

[0032] 31 - First mounting seat, 311 - Positioning ring, 32 - Bushing, 33 - Second bolt, 34 - Oil seal;

[0033] 41 - First washer, 42 - First bolt, 43 - First limiting member;

[0034] 5 - Cover back plate, 51 - Installation cavity, 52 - Through slot;

[0035] 61 - Second mounting seat, 611 - Positioning table, 62 - Fourth bolt;

[0036] 71 - Second washer, 72 - Self-locking nut. Detailed implementation manners

[0037] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0039] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] As Figures 1 to 4 shown is a marine hatch cover structure provided in this embodiment, which is applied to cover the opening of the ship's cabin. The opening of the ship's cabin communicates with the deck and the lower cabin. The marine hatch cover structure includes a hatch cover main body 1 and two locking components. The hatch cover main body 1 is adapted to abut against the outer side surface of the deck in the first direction and is adapted to cover and seal the opening of the ship's cabin; the hatch cover main body 1 includes a carbon fiber panel 11 and a PMI foam board 12, and the PMI foam board 12 is clamped inside the carbon fiber panel 11; the two locking components are arranged opposite to each other in the second direction on the hatch cover main body 1; the locking component includes a first connecting rod 21 rotatably connected to the hatch cover main body 1. The first connecting rod 21 is adapted to pass through the opening of the ship's cabin and is provided with a locking head 22. The locking head 22 has a locking state in which it extends and abuts against the inner side surface of the deck in the first direction, and an unlocking state in which it retracts and separates from the inner side surface of the deck in the first direction. It can be understood that the first direction, the second direction, and the third direction described in the text refer toFigure 1 The first direction, the second direction, and the third direction in it, the first direction, the second direction, and the third direction are perpendicular to each other in pairs, and the second direction and the third direction are located on the same horizontal plane.

[0042] A marine hatch cover structure in this embodiment sets the hatch cover main body 1 as a carbon fiber panel 11, and a PMI foam board 12 is clamped inside the carbon fiber panel 11. Compared with the hatch cover main body 1 made of a pure fiber board, in the hatch cover main body 1 of the marine hatch cover structure in this embodiment, the PMI foam board 12 clamped inside the carbon fiber panel 11 can improve the overall stiffness of the hatch cover main body 1, and has a stronger ability to resist the impact of sea waves. Moreover, the weight of the PMI foam board 12 with the same volume is lighter than the weight of the carbon fiber panel 11, which can make the hatch cover main body 1 lighter, so as to facilitate manual opening and closing operations; and the hatch cover main body 1 formed by the combination of the carbon fiber panel 11 and the PMI foam board 12 has good high-temperature resistance and salt spray resistance characteristics. When placed in the marine environment for a long time, it has significantly better corrosion resistance to the marine environment than a steel hatch cover. Also, two locking components are arranged oppositely on both sides of the hatch cover main body 1 along the second direction; when it is necessary to cover and seal the cabin opening, the hatch cover main body 1 is abutted against the outer side surface of the deck along the first direction. At this time, the locking head 22 is located in the lower cabin. Subsequently, rotate the locking head 22 forward to extend and abut against the inner side surface of the deck, so as to realize the covering and sealing of the cabin opening; when it is necessary to open the cabin opening, just rotate the locking head 22 backward to retract and separate from the inner side surface of the deck, and the lightweight marine hatch cover structure in this embodiment can be removed from the cabin opening as a whole. And the marine hatch cover structure in this embodiment is separately arranged from the deck, so as to replace or repair the marine hatch cover structure in this embodiment as a whole.

[0043] It should be noted that compared with a traditional steel hatch cover of the same size, the weight reduction of the hatch cover main body 1 in this embodiment can reach more than 80%; compared with a hatch cover with a pure fiber panel structure of the same size, the weight reduction of the hatch cover main body 1 in this embodiment can reach more than 60%, and the forming processability of the hatch cover with a pure fiber panel structure is poor and the cost is high.

[0044] As Figures 1 to 4 shown, in some embodiments of the present utility model, the locking component further includes a first driving handle 23. One end of the first connecting rod 21 extending outward along the first direction extends outside the hatch cover main body 1 and is connected to the first driving handle 23, so that an operator can drive the first connecting rod 21 to rotate forward or backward through the first driving handle 23 on the deck, so as to quickly manually cover and seal the cabin opening or open the cabin opening.

[0045] As Figure 1 、 Figure 2 、 Figure 3 、Figure 5 and Figure 6 As shown, in some embodiments of the utility model, the locking assembly further comprises a second connecting rod 24, the second connecting rod 24 is rotatably connected to the hatch cover body 1, a locking tack 22 is arranged on the second connecting rod 24, the second connecting rod 24 and the first connecting rod 21 are arranged at intervals along the third direction, the first connecting rod 21 and the second connecting rod 24 are connected by a driving connecting rod 25, and the first connecting rod 21 and the second connecting rod 24 rotate synchronously under the drive of the driving connecting rod 25. On the one hand, by providing two locking tacks 22 arranged at intervals along the third direction in each locking assembly, the connection tightness when the ship hatch cover structure of this embodiment covers and seals the cabin opening is increased; on the other hand, by connecting the first connecting rod 21 and the second connecting rod 24 through the driving connecting rod 25, only one first driving handle 23 is needed to drive the two locking tacks 22 of each locking assembly to rotate synchronously, and the structure is more compact.

[0046] like Figures 1 to 3 As shown, in some embodiments of the utility model, the marine hatch cover structure also includes a cover back plate 5, the cover back plate 5 is arranged on the inner side of the hatch cover body 1 along the first direction, and forms an installation cavity 51 with the clamping area of ​​the hatch cover body 1, and the driving connecting rod 25 is arranged in the installation cavity 51; a through groove 52 is arranged on the cover back plate 5 at a position corresponding to the locking trunnion 22, and the through groove 52 is connected to the installation cavity 51 and is suitable for the locking trunnion 22 to pass through. By hiding most of the structure of the locking assembly in the installation cavity 51, better protection is provided; and a through groove 52 is provided on the cover back plate 5, so that when the locking bolt 22 is rotated in the forward direction, the locking bolt 22 can pass through the through groove 52 and extend out of the installation cavity 51 and abut against the inner side of the deck to achieve covering and sealing of the cabin opening; when the locking bolt 22 is rotated in the reverse direction, the locking bolt 22 can pass through the through groove 52 and retract into the installation cavity 51 and staggered with the inner side of the deck, so that the lightweight ship hatch cover structure of this embodiment can be moved out of the cabin opening as a whole; and the locking bolt 22 in the unlocked state is effectively protected from being easily damaged by collision with the outside.

[0047] In some embodiments of the utility model, the cover back plate 5 is configured as a carbon fiber back plate; compared with a traditional steel cover back plate 5, a carbon fiber back plate of the same volume has a smaller weight, making the marine hatch cover structure of this embodiment more lightweight.

[0048] like Figure 1 and Figure 2As shown, in some embodiments of the utility model, one end of the first connecting rod 21 away from the first driving handle 23 extends to the outside of the cover back plate 5, and is connected to the second driving handle 26; to ensure that the operator can drive the first connecting rod 21 to rotate forward or reversely through the second driving handle 26 even in the lower cabin, so as to quickly manually cover and seal the cabin opening or open the cabin opening, which is more flexible to use.

[0049] like Figure 3 and Figure 4 As shown, in some embodiments of the utility model, the hatch cover body 1 has a first mounting seat 31 at a position corresponding to the first connecting rod 21, and a first through hole is provided in the first mounting seat 31 along a first direction, and the first connecting rod 21 is rotatably connected to the first through hole through a bushing 32; the first connecting rod 21 extends to the portion outside the hatch cover body 1 and is movably sleeved with a first washer 41, and the first driving handle 23 is movably sleeved on the first connecting rod 21 along the first direction; the first connecting rod 21 is connected to a first limiter 43 through a first bolt 42; in this way, when the first connecting rod 21 needs to be moved, When the connecting rod 21 and the first driving handle 23 are assembled into one, the first connecting rod 21 is first inserted into the first through hole through the bushing 32 to realize a rotational connection. At this time, the first connecting rod 21 extends to the outside of the hatch cover body 1 away from the outer end of the locking bolt 22. Then, the first washer 41 is sleeved on the part of the first connecting rod 21 extending outside the hatch cover body 1, and then the first driving handle 23 is sleeved. Finally, the first limit member 43 is connected through the first bolt 42. At this time, the first limit member 43 and the first washer 41 are respectively abutted against the two end surfaces of the first driving handle 23 along the first direction, and the assembly is completed. When the first connecting rod 21 needs to be separated from the first driving handle 23, it is only necessary to remove the first bolt 42 and the first limit member 43, and then the first connecting rod 21 and the first driving handle 23 can be separated for repair or replacement, thereby reducing the repair and maintenance costs; then, after removing the first washer 41, the first connecting rod 21 with the locking bolt 22 can be removed from the first mounting seat 31 for repair or replacement, thereby further reducing the repair and maintenance costs.

[0050] like Figure 4 As shown, specifically, an oil seal 34 is provided between the surrounding wall of the first through hole and the outer side wall of the first connecting rod 21 .

[0051] like Figure 4As shown, in some embodiments of the utility model, the hatch cover body 1 is provided with a second through hole at a position corresponding to the first mounting seat 31, the second through hole matches the first mounting seat 31, and the side wall of the first mounting seat 31 extending outside the second through hole is convexly provided with a positioning ring 311, and the positioning ring 311 is connected to the hatch cover body 1 through a second bolt 33. The first mounting seat 31 is detachably connected to the hatch cover body 1 through the second bolt 33, and when the first mounting seat 31 is damaged, it is convenient to remove the first mounting seat 31 for repair or replacement, thereby reducing the repair and maintenance costs.

[0052] like Figure 3 and Figure 5 As shown, in some embodiments of the utility model, an internal threaded hole is provided on the inner side surface of the hatch cover body 1 along the first direction at a position corresponding to the second connecting rod 24, and a third bolt 27 is internally threadedly connected to the internal threaded hole, and the second connecting rod 24 is rotatably connected to the rod portion of the third bolt 27. The second connecting rod 24 and the hatch cover body 1 are detachably connected to each other as one by threading the third bolt 27 and the internal threaded hole. When the second connecting rod 24 is damaged, it is convenient to remove the second connecting rod 24 for repair, thereby reducing the repair and maintenance costs.

[0053] It should be noted that both ends of the driving connecting rod 25 are detachably connected to the first connecting rod 21 and the second connecting rod 24 respectively through a latch connection structure.

[0054] like Figure 1 , Figure 3 and Figure 5 As shown, in some embodiments of the utility model, the hatch cover body 1 is detachably connected to a second mounting seat 61 at a position corresponding to the third bolt 27, and the internal threaded hole is arranged on the second mounting seat 61; when the internal threaded hole is damaged and cannot be normally fastened with the third bolt 27, the second mounting seat 61 can be removed and replaced, thereby reducing the repair and maintenance costs.

[0055] Optionally, a third through hole is provided at a position of the hatch cover body 1 corresponding to the second mounting seat 61, and the third through hole matches the second mounting seat 61. The second mounting seat 61 extends from one end of the second driving handle 26 along the first direction to the outside of the third through hole, and a positioning platform 611 is convexly provided on the side wall, and the positioning platform 611 is connected to the hatch cover body 1 through a fourth bolt 62. The second mounting seat 61 is detachably connected to the hatch cover body 1 through the fourth bolt 62, and when the internal threaded hole is damaged and cannot be used normally, it is convenient to remove the second mounting seat 61 for replacement, thereby reducing the repair and maintenance costs.

[0056] like Figure 3 and Figure 4As shown, in some embodiments of the present utility model, the cover back plate 5 abuts against the end faces of the hatch cover main body 1 facing each other in the first direction. A second washer 71 is movably sleeved on the portion of the first connecting rod 21 extending outside the cover back plate 5. The second driving handle 26 is movably sleeved on the first connecting rod 21 in the first direction. A self-locking nut 72 is threadedly connected to the first connecting rod 21. When the marine hatch cover structure of this embodiment is assembled, the self-locking nut 72 and the second washer 71 respectively abut against the two end faces of the second driving handle 26 in the first direction, and the other end of the second washer 71 abuts against the cover back plate 5. When it is necessary to repair or maintain the components located inside the installation cavity 51, first unscrew the self-locking nut 72, and then remove the second driving handle 26 and the second washer 71 respectively. At this time, the cover back plate 5 can be removed to repair or maintain the components located inside the installation cavity 51.

[0057] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present utility model.

Claims

1. A marine hatch cover structure, applied to cover a cabin opening, the cabin opening communicating with a deck and a lower cabin, characterized in that: The marine hatch cover structure comprises: A hatch cover body (1) is suitable for abutting against the outer side of a deck along a first direction and for covering and sealing a cabin opening; the hatch cover body (1) comprises a carbon fiber panel (11) and a PMI foam board (12), wherein the PMI foam board (12) is sandwiched in the carbon fiber panel (11); Two locking assemblies are arranged relative to the hatch cover body (1) along the second direction, and the first direction and the second direction are perpendicular to each other; the locking assembly comprises a first connecting rod (21) rotatably connected to the hatch cover body (1), the first connecting rod (21) is suitable for passing through the cabin opening, and is provided with a locking tack (22), the locking tack (22) has a locking state in which it extends out and abuts against the inner side surface of the deck along the first direction, and an unlocking state in which it is retracted and separated from the inner side surface of the deck along the first direction.

2. A marine hatch cover structure according to claim 1, characterized in that: The locking assembly further comprises a first driving handle (23); one end of the first connecting rod (21) extending outwards along a first direction to the outside of the hatch cover body (1) and connected to the first driving handle (23).

3. A marine hatch cover structure according to claim 2, characterized in that: The hatch cover body (1) has a first mounting seat (31) at a position corresponding to the first connecting rod (21); a first through hole is provided in the first mounting seat (31) along a first direction; the first connecting rod (21) is rotatably connected to the first through hole via a bushing (32); a portion of the first connecting rod (21) extending outside the hatch cover body (1) is movably sleeved with a first washer (41); the first driving handle (23) is movably sleeved on the first connecting rod (21) along the first direction; the first connecting rod (21) is connected to a first limiting member (43) via a first bolt (42); during assembly, the first limiting member (43) and the first washer (41) respectively abut against two end surfaces of the first driving handle (23) along the first direction.

4. A marine hatch cover structure according to claim 3, characterized in that: The hatch cover body (1) is provided with a second through hole at a position corresponding to the first mounting seat (31), the second through hole matches the first mounting seat (31), and a positioning ring (311) is protruded from the side wall of the first mounting seat (31) extending outside the second through hole, and the positioning ring (311) is connected to the hatch cover body (1) by a second bolt (33).

5. A marine hatch cover structure according to claim 2, characterized in that: The locking assembly further comprises a second connecting rod (24), the second connecting rod (24) being rotatably connected to the hatch cover body (1), a locking bolt (22) being provided on the second connecting rod (24), the second connecting rod (24) and the first connecting rod (21) being arranged at intervals along a third direction, the first connecting rod (21) and the second connecting rod (24) being transmission-connected via a driving connecting rod (25), the first connecting rod (21) and the second connecting rod (24) rotating synchronously under the drive of the driving connecting rod (25); the first direction, the second direction and the third direction are mutually perpendicular in pairs.

6. A marine hatch cover structure according to claim 5, characterized in that: The invention also comprises a cover back plate (5), wherein the cover back plate (5) is arranged on the inner side of the hatch cover body (1) along the first direction and forms a mounting cavity (51) with the clamping area of ​​the hatch cover body (1), and the driving connecting rod (25) is arranged in the mounting cavity (51); a through groove (52) is arranged on the cover back plate (5) at a position corresponding to the locking bolt (22), and the through groove (52) is connected with the mounting cavity (51) and is suitable for the locking bolt (22) to pass through.

7. A marine hatch cover structure according to claim 6, characterized in that: One end of the first connecting rod (21) facing away from the first driving handle (23) extends outside the cover back plate (5) and is connected to a second driving handle (26); And / or, the cover back plate (5) is configured as a carbon fiber back plate.

8. A marine hatch cover structure according to claim 5, characterized in that: An internal threaded hole is provided on the inner side surface of the hatch cover body (1) along the first direction at a position corresponding to the second connecting rod (24); a third bolt (27) is internally threadedly connected to the internal threaded hole; and the second connecting rod (24) is rotatably connected to the rod portion of the third bolt (27).

9. A marine hatch cover structure according to claim 8, characterized in that: The hatch cover body (1) is detachably connected to a second mounting seat (61) at a position corresponding to the third bolt (27), and the internal threaded hole is provided on the second mounting seat (61).

10. A marine hatch cover structure according to claim 7, characterized in that: The cover back plate (5) and the hatch cover body (1) are in contact with each other along the first direction, and the first connecting rod (21) is movably sleeved on the part outside the cover back plate (5), and the second driving handle (26) is movably sleeved on the first connecting rod (21) along the first direction; a self-locking nut (72) is threadedly connected to the first connecting rod (21); during assembly, the self-locking nut (72) and the second washer (71) are respectively in contact with the two end surfaces of the second driving handle (26) along the first direction, and the other end of the second washer (71) is in contact with the cover back plate (5).

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