Ventilation device for a ship

Abstract

The utility model provides a ventilation device for a ship, which comprises a shell and a door body, the shell comprises an air inlet communicated with the outside, and the air inlet comprises an air inlet end and an air outlet end; the door body comprises a matching surface and a pressed surface which are opposite to each other in the thickness direction of the door body, and at least part of the pressed surface is sunken in the direction, pointing to the matching surface, of the pressed surface; the door body is movably connected with the shell between a first station and a second station, the door body is configured to be arranged at the air inlet end in a covering mode and abut against the end face of the air inlet end when the door body is located at the first station, and the door body avoids the air inlet end when the door body is located at the second station and abuts against the end face of the air inlet end when the door body is located at the second station. And the air inlet is communicated with the outside. The ventilation device is good in sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment for ship ventilation, and particularly relates to a ventilation device for a ship. Background Art

[0002] The ventilation valve in the related art is used to control the connection or disconnection between the cabin inside the ship and the outside atmosphere. The valve core of the ventilation valve in the related art is movably arranged in the valve body, so that the valve core can cover the air inlet of the valve body or the valve core can avoid the air inlet, so as to control the connection or disconnection between the cabin inside and the outside atmosphere through the air inlet. However, when the external pressure is relatively large, for example, when the ventilation valve is in a working state with relatively high water pressure, the problem of loose fit occurs between the valve core and the air inlet after the valve core is pressed, resulting in a certain gap being formed between the valve core and the air inlet, and the sealing performance of the ventilation valve is poor. Summary of the Utility Model

[0003] In view of the above problems, the present utility model is proposed to provide a ventilation device for a ship that can overcome or at least partially solve the above problems, and the ventilation device of the present utility model has better sealing performance.

[0004] To this end, the present utility model proposes a ventilation device for a ship, including: a housing, the housing includes an air inlet communicating with the outside, and the air inlet includes an air inlet end and an air outlet end; a door body, the door body includes a mating surface and a pressure receiving surface opposite to each other in its thickness direction, and at least a part of the pressure receiving surface is recessed in the direction pointing from the pressure receiving surface to the mating surface; the door body is movably connected to the housing between a first working position and a second working position, and the door body is configured to cover the air inlet end when in the first working position, and the mating surface abuts against the end surface of the air inlet end, and when in the second working position, the door body avoids the air inlet end, so that the air inlet communicates with the outside.

[0005] In some embodiments, an annular sealing groove is provided on the mating surface of the door body, and an annular sealing member is provided in the annular sealing groove; when the door body is in the second working position, a part of the annular sealing member abuts against the mating surface, another part of the annular sealing member abuts against the annular sealing groove, and the edge of the air inlet end is located inside the annular sealing member.

[0006] In some embodiments, the size of the cross-section of the annular sealing member in the radial direction of the door body decreases in the direction pointing from the pressure receiving surface to the mating surface; the size of the cross-section of the annular sealing groove in the radial direction of the door body decreases in the direction pointing from the pressure receiving surface to the mating surface.

[0007] In some embodiments, the ventilation device for a ship further includes:

[0008] A driving arm, the driving arm includes a first end and a second end in its length direction, the first end is rotatably connected to the door body, and the connection position between the first end and the door body is located at the central position of the pressure receiving surface;

[0009] A rotating shaft, a part of the rotating shaft in its axial direction is connected to the second end of the door body;

[0010] A driver, the driver is connected to another part of the rotating shaft in its axial direction, and the driver can drive the rotating shaft to rotate.

[0011] In some embodiments, the ventilation device for a ship further includes:

[0012] A connecting component, the connecting component includes a first connecting piece and a second connecting piece, the first connecting piece includes a first connecting portion and a first clamping portion, the first clamping portion is plural, and the plural first clamping portions are spaced apart in the circumferential direction of the first connecting portion, and a first inserting groove is defined between two adjacent first clamping portions; the second connecting piece includes a second connecting portion and a second clamping portion, the second clamping portion is plural, and the plural second clamping portions are spaced apart in the circumferential direction of the second connecting portion, and a second inserting groove is defined between two adjacent second clamping portions;

[0013] The first connecting portion is connected to the other part of the rotating shaft in its axial direction; the driver has a driving shaft, and the second connecting portion is connected to the driving shaft; the plural first clamping portions are respectively engaged with the plural second inserting grooves, and the plural second clamping portions are respectively engaged with the plural first inserting grooves, so that the rotating shaft is connected to the driving shaft.

[0014] In some embodiments, a guiding member is provided on the pressure receiving surface, a guiding groove is provided on the guiding member, and the extending direction of the guiding groove is the same as the thickness direction of the door body; a fitting member is provided in the housing, the fitting member is engaged with the guiding groove, the fitting member corresponds to the central axis of the air inlet, and both the fitting member and the central position of the door body in the first working position correspond to the central axis of the air inlet.

[0015] In some embodiments, the housing defines a receiving cavity, and both the door body and the fitting member are provided in the receiving cavity; a first bracket and a second bracket are further provided in the receiving cavity, the first bracket and the second bracket are spaced apart, the air inlet is located between the first bracket and the second bracket, and the fitting member is connected between the first bracket and the second bracket.

[0016] In some embodiments, the ventilation device for a ship further includes:

[0017] A position detector, which cooperates with one of the door body and the rotating shaft, is electrically connected to the driver, and is configured to make the driver work with a first preset driving force when the door body is in the first working position; and make the driver work with a second preset driving force when the door body is between the first working position and the second working position; wherein, the second preset driving force is greater than the first preset driving force.

[0018] In some embodiments, the housing defines a receiving cavity, the door body and the driving arm are both arranged in the receiving cavity, and this part of the rotating shaft in its axial direction is rotatably connected to the inner wall surface of the receiving cavity; a through hole communicating with the outside is provided on the housing, and the other part of the rotating shaft in its axial direction extends out of the through hole.

[0019] In some embodiments, the ventilation device for a ship further includes: a sealing sleeve, which is sleeved on the rotating shaft, the inner wall surface of the sealing sleeve is in contact with the rotating shaft, and the outer wall surface of the sealing sleeve is in contact with the inner wall surface of the through hole.

[0020] In the ventilation device for a ship according to the embodiment of the present invention, a door body that can be movably disposed between a first working position and a second working position is provided at the air inlet. And, when the door body is in the second working position, due to the recess on the pressure-receiving surface of the door body in the direction from the pressure-receiving surface to the mating surface, when the external pressure increases, the door body can be more tightly pressed against the end surface of the air inlet end, so that the sealing performance of the ventilation device for a ship according to the embodiment of the present invention is better.

[0021] Those skilled in the art will understand more clearly the above and other objects, advantages and features of the present invention from the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an exemplary but non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 is a schematic structural diagram of a ventilation device according to an embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of a ventilation device according to an embodiment of the present invention;

[0025] Figure 3 is according to Figure 2 the schematic cross-sectional view taken along the line A-A in

[0026] Figure 4 is based on Figure 2 the schematic sectional view structure at position B in

[0027] Figure 5 the schematic structural diagram of the second connecting member according to an embodiment of the present utility model;

[0028] Figure 6 the schematic structural diagram of the first connecting member according to an embodiment of the present utility model;

[0029] Reference numerals:

[0030] housing 100; through hole 101; air inlet 110; air inlet end 111; air outlet end 112; accommodation cavity 113; first bracket 121; second bracket 122; fitting 123; door body 200; mating surface 201; pressure receiving surface 202; annular sealing groove 210; annular sealing member 220; guiding member 230; guiding groove 231; driving arm 310; first end 311; second end 312; rotating shaft 320; driver 330; position detector 331; connection assembly 400; first connecting member 410; first connecting portion 411; first clamping portion 412; first insertion slot 413; second connecting member 420; second connecting portion 421; second clamping portion 422; second insertion slot 423. Detailed implementation manners

[0031] Next, refer to Figures 1 to 6 to describe the ventilation device for a ship according to an embodiment of the present utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of these features, that is, including one or more of these features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. When a certain feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0032] Unless otherwise clearly defined and limited, terms such as "set", "installed", "connected", "linked", "fixed", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present utility model according to specific circumstances.

[0033] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but in contact through additional features therebetween. That is, in the description of this embodiment, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", or "under" the second feature may be the first feature being directly below or obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0034] In the description of this embodiment, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0035] The ventilation device for a ship according to an embodiment of the present utility model will be described below with reference to the drawings.

[0036] As Figures 1 - 6 shown, the ventilation device for a ship according to an embodiment of the present utility model includes a housing 100 and a door body 200.

[0037] The housing 100 includes an air inlet 110 communicating with the outside, the air inlet 110 can communicate with the cabin space, and the air inlet 110 includes an air inlet end 111 and an air outlet end 112. The ventilation device of this embodiment is arranged in the ventilation duct of the ship to control the connection and disconnection between the ventilation duct and the outside.

[0038] The door body 200 includes a mating surface 201 and a pressure-receiving surface 202 that are opposite to each other in its thickness direction, and at least a part of the pressure-receiving surface 202 is formed to be recessed in the direction from the pressure-receiving surface 202 towards the mating surface 201. The door body 200 is movably connected to the housing 100 between a first working position and a second working position.

[0039] The door body 200 is configured such that when it is in the first working position, the door body 200 covers the air inlet end 111, and the mating surface 201 abuts against the end surface of the air inlet end 111. When it is in the second working position, the door body 200 avoids the air inlet end 111 so that the air inlet 110 communicates with the outside.

[0040] The following describes the specific implementation manners of the ventilation device for a ship according to the embodiments of the present invention with reference to the accompanying drawings.

[0041] When ventilation is not required in the ventilation duct of the ship, the door body 200 is moved to the first working position so that the door body 200 covers the air inlet end 111, and the mating surface 201 of the door body 200 abuts against the end surface of the air inlet end 111 of the housing 100 to close the air inlet 110 through the door body 200.

[0042] When ventilation is not required in the ventilation duct of the ship, the door body 200 is moved to the second working position so that the door body 200 avoids the air inlet 110, allowing the outside air flow to enter the ventilation duct of the ship through the air inlet 110.

[0043] Compared with the related art, in the ventilation device for a ship according to the embodiments of the present invention, a door body 200 that can be movably disposed between a first working position and a second working position is provided at the air inlet 110. Moreover, when the door body 200 is in the second working position, due to the recess on the pressure-receiving surface 202 of the door body 200 in the direction from the pressure-receiving surface 202 towards the mating surface 201, when the outside pressure increases, the door body 200 can be more tightly pressed against the end surface of the air inlet end 111, thereby making the sealing performance of the ventilation device according to the embodiments of the present invention better.

[0044] Optionally, the ratio of the thickness of the door body 200 to the depth of the recess in the direction from the pressure-receiving surface 202 towards the mating surface 201 is 1 - 1.5. Or, the ratio of the thickness of the door body 200 to the depth of the recess in the direction from the pressure-receiving surface 202 towards the mating surface 201 is 1.1 - 1.4. Or, the ratio of the thickness of the door body 200 to the depth of the recess in the direction from the pressure-receiving surface 202 towards the mating surface 201 is 1.2 - 1.3. On the one hand, the pressure-receiving surface 202 of the door body 200 can form a recess with a sufficient depth dimension, and when the outside pressure increases, the door body 200 can be more tightly pressed against the end surface of the air inlet end 111, thereby improving the sealing performance of the ventilation device in this embodiment; on the other hand, it avoids the depth dimension of the recess being too large, thereby ensuring the structural strength of the door body 200 and extending the service life of the ventilation device in this embodiment.

[0045] Wherein, the ratio of the thickness of the door body 200 to the depth of the recess in the direction from the pressure surface 202 to the mating surface 201 includes but is not limited to 1, 1.1, 1.2, 1.3, 1.4 or 1.5.

[0046] In some embodiments, as Figure 2 and Figure 4 shown, an annular sealing groove 210 is provided on the mating surface 201 of the door body 200, and an annular seal 220 is provided in the annular sealing groove 210. When the door body 200 is in the second working position, a part of the annular seal 220 abuts against the mating surface 201, another part of the annular seal 220 abuts against the annular sealing groove 210, and the edge of the air inlet end 111 is located inside the annular seal 220.

[0047] In other words, when the door body 200 is in the second working position, the door body 200 can be more tightly pressed against the end face of the air inlet end 111, so that the sealing performance of the ventilation device for ships according to the embodiment of the present invention is better.

[0048] Furthermore, as Figure 4 shown, the dimension of the cross-section of the annular seal 220 in the radial direction of the door body 200 decreases in the direction from the pressure surface 202 to the mating surface 201. The dimension of the cross-section of the annular sealing groove 210 in the radial direction of the door body 200 decreases in the direction from the pressure surface 202 to the mating surface 201.

[0049] In other words, the two opposite wall surfaces of the annular sealing groove 210 are inclined in the radial direction of the door body 200, and the distance between the two wall surfaces in the radial direction of the door body 200 decreases in the direction from the pressure surface 202 to the mating surface 201. When the door body 200 is in the second working position, a part of the annular seal 220 abuts against the mating surface 201. Due to the annular seal 220 being squeezed, another part of the annular seal 220 can be more tightly pressed against the two wall surfaces, so that the sealing performance of the ventilation device for ships according to the embodiment of the present invention is better.

[0050] In some embodiments, as Figures 2 - 3 shown, the ventilation device for ships according to the embodiment of the present invention further includes a driving arm 310, a rotating shaft 320 and a driver 330.

[0051] The driving arm 310 includes a first end 311 and a second end 312 in its length direction. The first end 311 is rotatably connected to the door body 200, and the connection position between the first end 311 and the door body 200 is located at the central position of the pressure-receiving surface 202. A part of the rotating shaft 320 in its axial direction is connected to the second end 312 of the door body 200. The driver 330 is connected to another part of the rotating shaft 320 in its axial direction, and the driver 330 can drive the rotating shaft 320 to rotate.

[0052] When ventilation is not required in the ventilation duct of the ship, the driver 330 drives the driving arm 310 to rotate, so that the door body 200 moves to the first working position, and the door body 200 covers the air inlet end 111. The mating surface 201 of the door body 200 abuts against the end surface of the air inlet end 111 of the housing 100, so as to close the air inlet 110 through the door body 200. When ventilation is not required in the ventilation duct of the ship, the driver 330 drives the driving arm 310 to rotate, so that the door body 200 moves to the second working position, and the door body 200 avoids the air inlet 110, so that the external air flow can enter the ventilation duct of the ship through the air inlet 110. By using the driver 330 to drive the driving arm 310 to rotate, the door body 200 is driven to move between the first working position and the second working position, so as to realize the closing or opening of the air inlet 110 by the door body 200, which is not only convenient to operate, but also simple in structure and easy to manufacture.

[0053] In addition, the connection position between the first end 311 and the door body 200 is located at the central position of the pressure-receiving surface 202. Thus, when the door body 200 covers the air inlet 110, the position where the first end 311 of the driving arm 310 applies pressure to the door body 200 is the central position of the pressure-receiving surface 202, making the force on the door body 200 more uniform, and further improving the sealing performance of the ventilation device for ships in the embodiment of the present invention.

[0054] In some embodiments, as Figure 5 Figure 6 shown, the ventilation device for ships in the embodiment of the present invention further includes a connection assembly 400. The connection assembly 400 includes a first connecting member 410 and a second connecting member 420. The first connecting member 410 includes a first connecting portion 411 and a first clamping portion 412. There are multiple first clamping portions 412, and the multiple first clamping portions 412 are spaced apart in the circumferential direction of the first connecting portion 411. A first insertion slot 413 is defined between two adjacent first clamping portions 412; the second connecting member 420 includes a second connecting portion 421 and a second clamping portion 422. There are multiple second clamping portions 422, and the multiple second clamping portions 422 are spaced apart in the circumferential direction of the second connecting portion 421. A second insertion slot 423 is defined between two adjacent second clamping portions 422.

[0055] The first connecting portion 411 is connected to the other part of the rotating shaft 320 in its axial direction; the driver 330 has a driving shaft, and the second connecting portion 421 is connected to the driving shaft; a plurality of first engaging portions 412 are respectively engaged with a plurality of second insertion slots 423, and a plurality of second engaging portions 422 are respectively engaged with a plurality of first insertion slots 413, so that the rotating shaft 320 is connected to the driving shaft.

[0056] In other words, through the snap-fit between the first connecting member 410 and the second connecting member 420, the rotating shaft 320 can be more stably connected to the driver 330, so that the driver 330 can more stably drive the rotating shaft 320 to rotate, improving the operating stability of the ventilation device for ships according to the embodiment of the present invention.

[0057] In some embodiments, as Figure 2 and Figure 3 shown, a guide member 230 is provided on the pressure receiving surface 202, and a guide groove 231 is provided on the guide member 230. The extending direction of the guide groove 231 is consistent with the thickness direction of the door body 200.

[0058] A fitting member 123 is provided in the housing 100. The fitting member 123 is engaged with the guide groove 231. The fitting member 123 corresponds to the central axis of the air inlet 110. The central positions of both the fitting member 123 and the door body 200 in the first working position correspond to the central axis of the air inlet 110.

[0059] In other words, as Figure 2 shown, when the door body 200 is in the second working position, through the guiding action of the guide member 230, the mating surface 201 and the central position of the door body 200 coincide with the central axis of the air inlet 110, ensuring that the position where the door body 200 is applied with pressure is the central position of the pressure receiving surface 202, making the force on the door body 200 more uniform, and further improving the sealing performance of the ventilation device for ships according to the embodiment of the present invention.

[0060] As Figure 2 shown, when the door body 200 is in the first working position, under the guiding action of the guide member 230, the door body 200 swings to avoid the air inlet 110, so that the air inlet 110 can intake air.

[0061] In some embodiments, as Figure 3As shown, the housing 100 defines a receiving cavity 113, and both the door body 200 and the fitting 123 are provided in the receiving cavity 113. A first bracket 121 and a second bracket 122 are further provided in the receiving cavity 113. The first bracket 121 and the second bracket 122 are spaced apart, and the air inlet 110 is located between the first bracket 121 and the second bracket 122. The fitting 123 is connected between the first bracket 121 and the second bracket 122. In other words, the air inlet 110 is located between the first bracket 121 and the second bracket 122, so that the first bracket 121 and the second bracket 122 do not obstruct the air intake of the air inlet 110. And with the support of the first bracket 121 and the second bracket 122, the fitting 123 is installed more stably.

[0062] In some embodiments, as Figure 2 shown, the ventilation device for a ship according to an embodiment of the present invention further includes a position detector 331. The position detector 331 cooperates with one of the door body 200 and the rotating shaft 320, and the position detector 331 is electrically connected to the driver 330. In other words, the position detector 331 cooperates with the rotating shaft 320; or, the position detector 331 cooperates with the door body 200.

[0063] The position detector 331 is configured to cause the driver 330 to work with a first preset driving force when the door body 200 is in the first working position. When the door body 200 is between the first working position and the second working position, the driver 330 is caused to work with a second preset driving force; wherein, the second preset driving force is greater than the first preset driving force.

[0064] Optionally, the position detector 331 can be a travel switch.

[0065] When the door body 200 moves from the first working position to the second working position, the driver 330 drives the driving arm 310 to rotate with a second preset driving force. When the door body 200 moves to the second working position, the driver 330 continuously applies a driving force to the driving arm 310 with a first preset driving force. That is to say, since an external pressure will exert a certain pressure on the door body 200, such as water pressure, when the door body 200 moves to the second working position, reducing the driving force continuously applied by the driver 330 to the driving arm 310 can also stably press the door body 200 against the end face of the air inlet end 111, thus reducing the energy consumed by the operation of the driver 330.

[0066] In some embodiments, as Figure 2As shown, the housing 100 defines a receiving cavity 113. The door body 200 and the driving arm 310 are both disposed within the receiving cavity 113. A part of the rotating shaft 320 in its axial direction is rotatably connected to the inner wall surface of the receiving cavity 113. The housing 100 is provided with a through hole 101 communicating with the outside. The other part of the rotating shaft 320 in its axial direction extends out of the through hole 101. Thus, the door body 200 and the driving arm 310 are both disposed within the receiving cavity 113, making it difficult for the door body 200 and the driving arm 310 to contact the external water body, avoiding corrosion and damage to the door body 200 and the driving arm 310, and therefore improving the service life.

[0067] In some embodiments, the ventilation device for a ship according to an embodiment of the present invention further includes: a sealing sleeve. The sealing sleeve is sleeved on the rotating shaft 320. The inner wall surface of the sealing sleeve is in contact with the rotating shaft 320, and the outer wall surface of the sealing sleeve is in contact with the inner wall surface of the through hole 101. Thus, the sealing performance of the housing 100 is further improved.

[0068] At this point, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the disclosed content of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A ventilation device for a ship, characterized in that, include: A housing, the housing comprising an air inlet connected to the outside, the air inlet comprising an air inlet end and an air outlet end; A door body, the door body comprising a mating surface and a pressure surface opposite to each other in a thickness direction thereof, wherein at least a portion of the pressure surface is formed to be concave in a direction from the pressure surface to the mating surface; The door body is movably connected to the shell between the first station and the second station, and the door body is configured such that when it is in the first station, the door body covers the air inlet end, and the mating surface abuts against the end surface of the air inlet end, and when it is in the second station, the door body avoids the air inlet end to allow the air inlet to communicate with the outside.

2. The ventilation device for a ship according to claim 1, characterized in that: An annular sealing groove is provided on the mating surface of the door body, and an annular sealing member is provided in the annular sealing groove; when the door body is in the second working position, a part of the annular seal is against the mating surface, another part of the annular seal is against the annular sealing groove, and the edge of the air inlet end is located on the inner side of the annular seal.

3. The ventilation device for a ship according to claim 2, characterized in that: The cross-section of the annular seal decreases in the radial direction of the door body in the direction from the pressure surface to the mating surface; the cross-section of the annular sealing groove decreases in the radial direction of the door body in the direction from the pressure surface to the mating surface.

4. The ventilation device for a ship according to claim 3, characterized in that, Further including: A driving arm, the driving arm comprising a first end and a second end in the length direction thereof, the first end being rotatably connected to the door body, and a connection position between the first end and the door body being located at a center position of the pressure-bearing surface; A rotating shaft, a portion of which in the axial direction is connected to the second end of the door body; A driver is connected to another part of the rotating shaft in the axial direction thereof, and the driver can drive the rotating shaft to rotate.

5. The ventilation device for a ship according to claim 4, characterized in that, Further including: A connecting component, the connecting component comprising a first connecting member and a second connecting member, the first connecting member comprising a first connecting portion and a first clamping portion, the first clamping portion being multiple, the multiple first clamping portions being spaced apart in the circumferential direction of the first connecting portion, and a first plugging groove being defined between two adjacent first clamping portions; the second connecting member comprising a second connecting portion and a second clamping portion, the second clamping portion being multiple, the multiple second clamping portions being spaced apart in the circumferential direction of the second connecting portion, and a second plugging groove being defined between two adjacent second clamping portions; The first connecting portion is connected to the other part of the rotating shaft in its axial direction; the driver has a driving shaft, and the second connecting portion is connected to the driving shaft; multiple first clamping portions are matched with multiple second plug-in slots one by one, and multiple second clamping portions are matched with multiple first plug-in slots one by one, so that the rotating shaft is connected to the driving shaft.

6. The ventilation device for a ship according to claim 4, characterized in that: A guide member is provided on the pressure-receiving surface, and a guide groove is provided on the guide member. The extending direction of the guide groove is consistent with the thickness direction of the door body; a fitting is provided in the housing. The fitting cooperates with the guide groove, the fitting corresponds to the central axis of the air inlet, and both the fitting and the central position of the door body in the first working position correspond to the central axis of the air inlet.

7. The ventilation device for a ship according to claim 6, wherein the housing defines a receiving cavity, and both the door body and the fitting are provided in the receiving cavity; a first bracket and a second bracket are further provided in the receiving cavity. The first bracket and the second bracket are spaced apart, the air inlet is located between the first bracket and the second bracket, and the fitting is connected between the first bracket and the second bracket.

8. The ventilation device for a ship according to claim 6, characterized in that, Further comprising: a position detector, the position detector cooperates with one of the door body and the rotating shaft, the position detector is electrically connected to the driver, and the position detector is configured to make the driver work with a first preset driving force when the door body is in the first working position; when the door body is between the first working position and the second working position, make the driver work with a second preset driving force; wherein, the second preset driving force is greater than the first preset driving force.

9. The ventilation device for a ship according to claim 4, wherein the housing defines a receiving cavity, the door body and the driving arm are both provided in the receiving cavity, and this part of the rotating shaft in its axial direction is rotatably connected to the inner wall surface of the receiving cavity; a through hole communicating with the outside is provided on the housing, and this other part of the rotating shaft in its axial direction extends out of the through hole.

10. The ventilation device for a ship according to claim 9, characterized in that, Further comprising: a sealing sleeve, the sealing sleeve is sleeved on the rotating shaft, the inner wall surface of the sealing sleeve is in contact with the rotating shaft, and the outer wall surface of the sealing sleeve is in contact with the inner wall surface of the through hole.

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