CN115123475A

CN115123475A - Waterproof ventilating device for water floating body

Info

Publication number: CN115123475A
Application number: CN202210955443.0A
Authority: CN
Inventors: 孙鹏东; 刘晓雷; 范会渠
Original assignee: Xiaertela Shanghai New Energy Technology Co ltd
Current assignee: Xiaertela Shanghai New Energy Technology Co ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2022-09-30

Abstract

The invention relates to the technical field of water floating equipment, in particular to a waterproof and breathable device of a water floating body, which comprises: the inner part of the floating body is provided with an inflation space for inflation, the outer surface of the floating body is provided with a mounting hole, and the mounting hole is communicated with the inflation space; the sealing plug is hermetically connected with the mounting hole, and is provided with an air hole which communicates the inflation space with the space outside the floating body; and the waterproof breathable film is arranged on one side surface of the sealing plug facing the inflatable space and covers the air holes. Through the sealing connection of the mounting hole on sealing plug and the body and waterproof ventilated membrane cover the bleeder vent on the sealing plug, the waterproof sealing function of body equipment has been realized, simultaneously, through the ventilative department of waterproof ventilated membrane on the sealing plug realize ventilation effect, can eliminate the unbalanced influence of inside and outside pressure that expend with heat and contract with cold brought the body equipment for body equipment does not receive expend with heat and contract with cold's harm at long-term operation in-process.

Description

Waterproof ventilating device for water floating body

Technical Field

The invention relates to the technical field of water floating equipment, in particular to a waterproof and breathable device of a water floating body.

Background

More than 70% of the area on the earth is covered by water, and with the increasing shortage of land resources, human beings gradually look to inland water areas and oceans, so that the space is wider and the resources are richer. In order to better develop various resources above and below water, people develop various water floating bodies, such as ships, deep submergence vehicles, offshore platforms and various buoys, and the manufacturing materials comprise steel, reinforced concrete, other high polymer materials and the like.

In order to ensure that these floats can work safely and effectively on water, i.e. ensure that they have sufficient and long-term effective buoyancy, the following two aspects need to be implemented: 1) the floating body needs to be subjected to waterproof treatment, namely water cannot leak into the floating body under any condition, so that the effective buoyancy of the floating body is reduced, and the risk of sinking is caused. If the water leakage cannot be avoided, it is necessary to ensure that the water drainage speed is higher than the water leakage speed, which is a very good choice. 2) The effectiveness of the buoyancy is indeed guaranteed to a certain extent if the float is completely closed (neither leaking water nor gas), but the float may be at risk of damage when the float structure is thin and the environment in which it is located may have large temperature differences. For example, if a container made of a polymer material by blow molding is completely closed by a sealing device, the container may be thermally expanded when the temperature is increased in summer, and the internal pressure of the container is higher than atmospheric pressure, which may cause distortion of the external dimensions or local structural expansion. Similarly, in winter, the air temperature is reduced, the air pressure in the container is reduced, and the container may be collapsed by the external atmospheric pressure, thereby causing partial structural damage or dimensional deformation. Therefore, it is necessary for the partial floating body to have both waterproof and air-permeable functions, so as to ensure that the floating body has sufficient buoyancy and the internal pressure of the floating body is the same as the external air pressure.

Disclosure of Invention

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a waterproof and air-permeable device for a floating body on water, which can make the floating body have two functions of waterproof and air-permeable, realize sealing and waterproof, and eliminate the influence of the internal and external pressure imbalance caused by thermal expansion and cold contraction on the floating body, thereby ensuring the safe operation of the floating body.

In order to solve the technical problems, the invention adopts the following technical scheme: a waterproof and breathable device for an aquatic float, comprising: the inner part of the floating body is provided with an inflation space for inflation, the outer surface of the floating body is provided with a mounting hole, and the mounting hole is communicated with the inflation space; the sealing plug is hermetically connected with the mounting hole, and is provided with an air hole which communicates the inflation space with the space outside the floating body; and the waterproof breathable film is arranged on one side surface of the sealing plug facing the inflatable space and covers the air holes.

Preferably, the sealing plug includes end cap and the linkage segment that extends towards the side center in the plenum space from the end cap, is equipped with the external screw thread on the periphery of linkage segment, and the mounting hole has the screw hole section that holds the linkage segment and holds the reaming section of end cap, is equipped with the internal thread of being connected with the external screw thread cooperation on the pore wall of screw hole section.

Preferably, the connecting device further comprises a sealing ring which is sleeved on the connecting section and is compressed between the end cap and the reaming section.

Preferably, an annular groove is formed in a side surface of the end cap away from the connecting section, and a tool for rotating the sealing plug clamps the sealing plug in the annular groove.

Preferably, the annular groove has an inner ring circumferential wall and an outer ring circumferential wall, the inner ring circumferential wall is polygonal, and the outer ring circumferential wall is circular.

Preferably, the annular groove is provided with an inner ring annular wall and an outer ring annular wall, the air vent is positioned in the inner ring annular wall, an end cover for covering the annular groove and the air vent is inserted in the annular groove, and a clearance channel for communicating the air vent with the space outside the floating body is reserved between the end cover and the end cover.

Preferably, the end cover comprises a cover plate, one side surface of the cover plate facing the annular groove is provided with an outer ring wall which is contacted with an outer ring wall, an inner ring wall which is contacted with an inner ring wall and is separated from the outer ring wall to form an annular cavity, and a protrusion which is positioned in the inner ring wall and is contacted with one side surface of the end cap far away from the connecting section, the protrusion enables the cover plate and the end cap to be separated to form a first separation space communicated with the air vent, the inner ring wall is provided with a groove for communicating the first separation space with the annular cavity, the inner ring wall and the outer ring wall are separated from a groove bottom wall of the annular groove to form a second separation space, and the peripheral side surface of the outer ring wall is provided with an air vent groove for communicating the second separation space with a space outside the floating body.

Preferably, the connecting section is concave towards the center of one side surface of the inflatable space to form a concave cavity, one end of the air vent close to the inflatable space penetrates through the cavity bottom wall of the concave cavity, and the waterproof breathable film is arranged on the cavity bottom wall of the concave cavity.

Preferably, the sealing plug is provided with a plurality of air holes, and the waterproof breathable film covers all the air holes on one side surface of the sealing plug facing the air inflation space.

Preferably, the connection mode of the waterproof breathable film and the sealing plug is bonding or welding.

Compared with the prior art, the invention has the remarkable progress that:

according to the waterproof and breathable device for the water floating body, the sealing plug is in sealing connection with the mounting hole in the floating body, and the waterproof breathable film covers the breathable hole in the sealing plug, so that the sealing and waterproof functions of floating body equipment are realized, meanwhile, the breathable effect is realized at the breathable hole in the sealing plug through the waterproof breathable film, the influence of expansion and contraction on unbalance of internal pressure and external pressure of the floating body equipment can be eliminated, the floating body equipment is not damaged by expansion and contraction in a long-term operation process, the hidden danger in the aspects of size deformation or local structural damage and the like caused by expansion and contraction after the floating body equipment is sealed is effectively solved, and the cost of early-stage manufacturing and later-stage maintenance can be saved. The waterproof and breathable device for the overwater floating body has the advantages of simple structure, controllable cost, flexible and convenient design and installation mode, small installation space, difficult failure and good applicability to floating body equipment with complex surface and small plane space. The waterproof and breathable device for the water floating body is particularly suitable for a high-molecular buoy for floating photovoltaic, can effectively avoid the harm of expansion caused by heat and contraction caused by cold of the high-molecular buoy, integrally improves the service life of the buoy, and saves cost.

Drawings

Fig. 1 is a schematic view showing a split structure of a waterproof and breathable device for an aquatic floating body according to an embodiment of the present invention.

Fig. 2 is a sectional view schematically showing the process of assembling the waterproof and breathable device (with the end caps removed) for the water floater according to the embodiment of the present invention.

Fig. 3 is a schematic sectional view showing the assembled waterproof and air-permeable means (with the end cap removed) for the floating body on water according to the embodiment of the present invention.

Fig. 4 is a schematic top view of a sealing plug in the waterproof and air-permeable device for the floating body on water according to the embodiment of the present invention.

Fig. 5 is a schematic sectional view taken along the line a-a in fig. 4.

Fig. 6 is a cross-sectional view illustrating an end cap and a sealing plug of the waterproof and air-permeable device for a floating body on water according to the embodiment of the present invention.

Fig. 7 is a schematic structural view of an end cap in the waterproof and breathable device for the floating body on water according to the embodiment of the invention.

Fig. 8 is a schematic bottom view of an end cap of the waterproof and breathable device for a floating body on water according to an embodiment of the present invention.

Wherein the reference numerals are as follows:

1 float

10 air-filled space

11 mounting hole

11a threaded bore section

11b reaming section

11c step surface

2 sealing plug

20 air holes

21 end cap

22 connecting segment

23 annular groove

23a inner ring wall

23b outer ring wall

23c groove bottom wall

24 cavity

3 waterproof and breathable film

4 sealing ring

5 end cap

51 cover plate

52 outer annular wall

521 ventilating groove

53 inner annular wall

531 slotting

54 annular cavity

55 projection

6 first space

7 second compartment

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative, and not restrictive, of the invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred apparatus or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1 to 8, one embodiment of the waterproof and breathable device for an aquatic float of the present invention.

Referring to fig. 1, 2 and 3, the waterproof and breathable device for the water floating body of the present embodiment comprises a floating body 1, a sealing plug 2 and a waterproof and breathable film 3. The floating body 1 has an air-filled space 10 inside for air filling, and the air-filled space 10 is filled with air so that the floating body 1 can float on the water surface. The outer surface of the floating body 1 is provided with a mounting hole 11, and the mounting hole 11 is communicated with the inflation space 10. The sealing plug 2 is hermetically connected with the mounting hole 11, the sealing plug 2 is provided with a vent hole 20, and the vent hole 20 communicates the inflation space 10 with the space outside the floating body 1. The waterproof breathable film 3 is arranged on one side surface of the sealing plug 2 facing the air inflation space 10 and covers the air vents 20. The waterproof breathable film 3 is a film layer with waterproof and breathable functions, and the material is not limited, and the waterproof breathable film can be made of the existing material capable of realizing waterproof and breathable functions. The connection mode of the waterproof breathable film 3 and the sealing plug 2 is preferably bonding or welding, and the welding mode is preferably ultrasonic welding. Of course, the waterproof breathable membrane 3 and the sealing plug 2 can also be connected in other ways to realize fixed connection.

The waterproof ventilation device of body on water of this embodiment, sealing connection through sealing plug 2 and the mounting hole 11 on the body 1 and waterproof ventilated membrane 3 cover bleeder vent 20 on the sealing plug 2, the waterproof sealing function of body equipment has been realized, and simultaneously, ventilative effect has been realized through the bleeder vent 20 department of waterproof ventilated membrane 3 on sealing plug 2, can eliminate the unbalanced influence of inside and outside pressure that expend with heat and contract with cold brought to body equipment, make body equipment not receive expend with heat and contract with cold's harm at the long-term operation in-process, effectively solved the body equipment sealed back because of the size deformation that expend with heat and contract with cold or the local hidden danger in the aspect of destroying of structure etc. can also save the cost of preparation in earlier stage and later stage dimension guarantor. The waterproof and breathable device for the overwater floating body has the advantages of simple structure, controllable cost, flexible and convenient design and installation mode, small installation space, difficulty in failure and good applicability to floating body equipment with complex surface and small plane space. The waterproof ventilative device of body on water of this embodiment is particularly useful for floating the used polymer flotation pontoon of photovoltaic, can effectively avoid the polymer flotation pontoon to receive the harm of expend with heat and contract with cold, and the cost is saved in the life of whole improvement flotation pontoon. Of course, the application of the waterproof and breathable device of the overwater floating body is not limited to floating photovoltaic, and the waterproof and breathable device can also be applied to floating body equipment with internal and external pressure balance requirements in other forms.

In this embodiment, referring preferably to fig. 2 and 3, the sealing plug 2 comprises an end cap 21 and a connecting section 22 extending from the center of a side of the end cap 21 facing the inflation space 10 of the floating body 1, and the outer circumference of the connecting section 22 is provided with an external thread. The mounting hole 11 on the floating body 1 is provided with a threaded hole section 11a for accommodating the connecting section 22 of the sealing plug 2 and a hole expanding section 11b for accommodating the end cap 21 of the sealing plug 2, an internal thread is arranged on the hole wall of the threaded hole section 11a, and the external thread of the connecting section 22 of the sealing plug 2 is matched and connected with the internal thread of the threaded hole section 11a, so that the tight connection between the sealing plug 2 and the mounting hole 11 is realized. The mounting hole 11 and the internal thread of the connecting section 22 thereof can be directly molded at a selected position on the floating body 1 according to the design requirement of the floating body 1 when the floating body 1 is blow molded, thereby facilitating the installation of the sealing plug 2.

In order to enhance the sealing performance of the connection between the sealing plug 2 and the installation hole 11, preferably, the waterproof and air-permeable device of the water floating body of the embodiment further includes a sealing ring 4, and the sealing ring 4 is sleeved on the connecting section 22 of the sealing plug 2 and is compressed between the end cap 21 of the sealing plug 2 and the reaming section 11b of the installation hole 11. In this embodiment, a stepped surface 11c is formed between the threaded hole section 11a and the enlarged hole section 11b of the mounting hole 11, and the sealing ring 4 is tightly pressed between the end cap 21 and the stepped surface 11 c. During assembly, the sealing ring 4 may be first placed into the hole-enlarged segment 11b of the mounting hole 11, so that one side surface of the sealing ring 4 is attached to the step surface 11c, then the connecting segment 22 of the sealing plug 2 is passed through the sealing ring 4 and screwed into the threaded hole segment 11a of the mounting hole 11, and the sealing plug 2 is screwed down, so that the end cap 21 of the sealing plug 2 is attached to the other side surface of the sealing ring 4 and the sealing ring 4 is pressed against the step surface 11c, thereby ensuring the sealing effect. In this embodiment, the material and the model of the sealing ring 4 are not limited, and can be selected appropriately according to actual conditions.

Preferably, after the assembly of the waterproof and breathable device for the water floating body of the embodiment is completed, one side surface of the end cap 21 of the sealing plug 2, which is far away from the connecting section 22, does not protrude out of the outer surface of the floating body 1, so that the waterproof and breathable device cannot be damaged and fail due to collision in the production, storage, transportation and operation processes of the floating body 1. Referring to fig. 3, preferably, the side of the end cap 21 of the sealing plug 2 facing away from the connecting section 22 may be designed to be flush with the outer surface of the floating body 1. Of course, the side of the end cap 21 of the sealing plug 2 facing away from the connecting piece 22 can also be designed to be lower than the outer surface of the floating body 1.

For the convenience of installation, in the present embodiment, referring to fig. 4 and 5, preferably, an annular groove 23 is formed on a side surface of the end cap 21 of the sealing plug 2 away from the connecting section 22, and a tool (such as a clamp or a wrench) for rotating the sealing plug 2 clamps the sealing plug 2 in the annular groove 23, thereby facilitating the smooth entry of the end cap 21 of the sealing plug 2 into the reaming section 11b of the installation hole 11 without interference of the tool. The annular groove 23 has an inner annular wall 23a and an outer annular wall 23b, the inner annular wall 23a and the outer annular wall 23b are connected by a groove bottom wall 23c, an operation space for placing a tool is formed between the inner annular wall 23a and the outer annular wall 23b at an interval, preferably, the inner annular wall 23a is polygonal (such as regular hexagon) to facilitate the holding of the sealing plug 2 by the tool, and the outer annular wall 23b is circular.

In view of the water and dust prevention at the annular groove 23 and the ventilation holes 20 on the side of the end cap 21 of the sealing plug 2 away from the connecting section 22, and particularly the dust prevention at the ventilation holes 20 to avoid the blockage of the ventilation holes 20, in the present embodiment, preferably, referring to fig. 1 and 6, the ventilation holes 20 are disposed within a circle formed by an inner annular wall 23a of the annular groove 23, and an end cap 5 is inserted into the annular groove 23, the end cap 5 covers the annular groove 23 and the ventilation holes 20, and a clearance passage communicating the ventilation holes 20 with the outer space of the floating body 1 is left between the end cap 5 and the end cap 21 of the sealing plug 2 for the circulation of gas. Therefore, the waterproof and dustproof effects can be achieved, and the ventilation effect can be guaranteed.

In the present embodiment, referring to fig. 6, 7 and 8, preferably, the end cap 5 includes a cover plate 51, and the shape of the cover plate 51 is adapted to the shape of the outer ring wall 23b of the annular groove 23, preferably, the cover plate is circular. The cover plate 51 has an outer annular wall 52 and an inner annular wall 53 extending from the outer periphery of a side surface facing the annular groove 23, the inner annular wall 53 is located within the outer annular wall 52, and the inner annular wall 53 is spaced from the outer annular wall 52 to form an annular cavity 54. A projection 55 is also provided on the side of the cover plate 51 facing the annular recess 23 within the inner annular wall 53. When the end cover 5 is inserted and matched with the annular groove 23, the outer annular wall 52 is contacted with the outer annular wall 23b, the inner annular wall 53 is contacted with the inner annular wall 23a, the protrusion 55 is contacted with one side surface of the end cap 21 of the sealing plug 2, which is far away from the connecting section 22, and the protrusion 55 avoids the air holes 20 on the end cap 21, therefore, the protrusion 55 enables the cover plate 51 and one side surface of the end cap 21, which is far away from the connecting section 22, to form a first spacing space 6 at intervals, the first spacing space 6 is communicated with the air holes 20, and the inner annular wall 53 is provided with a slot 531 for communicating the first spacing space 6 with the annular cavity 54; meanwhile, the outer annular wall 52 and the inner annular wall 53 of the end cap 5 and the groove bottom wall 23c of the annular groove 23 are spaced to form a second spaced space 7, the second spaced space 7 is communicated with the annular cavity 54, and the outer circumferential side surface of the outer annular wall 52 is provided with a ventilation groove 521 for communicating the second spaced space 7 with the space outside the floating body 1. The first space 6, the open groove 531, the annular cavity 54, the second space 7 and the ventilation groove 521 are communicated in sequence to form a gap channel for communicating the ventilation hole 20 with the external space of the floating body 1, so that gas can flow. In order to increase the ventilation effect, a plurality of ventilation grooves 521 are formed in the peripheral side surface of the outer annular wall 52 along the circumferential direction, a plurality of grooves 531 are formed in the inner annular wall 53 along the circumferential direction, a plurality of protrusions 55 are arranged in a circle, the plurality of protrusions 55 are arranged in the circle at intervals along the circumferential direction, and the ventilation holes 20 are formed in the circle of protrusions 55. In this embodiment, the end cap 5 and the annular groove 23 can be fixed relatively by interference fit between the outer annular wall 52 and the outer annular wall 23b of the annular groove 23.

In view of saving material, it is preferable that, referring to fig. 5, a cavity 24 is formed by recessing the connecting section 22 of the sealing plug 2 in the center of the side facing the air-filled space 10, the end of the vent hole 20 close to the air-filled space 10 penetrates through the cavity bottom wall of the cavity 24, and the waterproof breathable film 3 is provided on the cavity bottom wall of the cavity 24. The cavity 24 may extend to the end cap 21 of the sealing plug 2, the annular groove 23 of the end cap 21 is located on the outer periphery of the cavity 24 and does not interfere with the cavity 24, and the vent hole 20 is located in the inner annular wall 23a of the annular groove 23 of the end cap 21.

In order to enhance the ventilation effect, preferably, referring to fig. 4, the sealing plug 2 is provided with a plurality of ventilation holes 20, and the waterproof and breathable membrane 3 covers all the ventilation holes 20 on one side of the sealing plug 2 facing the air inflation space 10. In a preferred embodiment, all the ventilation holes 20 are located in the inner ring wall 23a of the annular groove 23 on the end cap 21 of the sealing plug 2 and penetrate through the cavity bottom wall of the cavity 24, and the waterproof and breathable membrane 3 covers all the ventilation holes 20 on the cavity bottom wall of the cavity 24.

In this embodiment, the whole sealing plug 2 has an axisymmetric structure, and may have a cylindrical or conical or other variable cross-section shape.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a waterproof ventilative device of body on water which characterized in that includes:

the floating body (1) is internally provided with an inflation space (10) for inflation, the outer surface of the floating body (1) is provided with a mounting hole (11), and the mounting hole (11) is communicated with the inflation space (10);

the sealing plug (2) is connected with the mounting hole (11) in a sealing mode, an air hole (20) is formed in the sealing plug (2), and the air inflation space (10) is communicated with the space outside the floating body (1) through the air hole (20);

and the waterproof breathable film (3) is arranged on one side surface of the sealing plug (2) facing the inflatable space (10) and covers the breathable hole (20).

2. The waterproof and breathable device for the water floating body according to claim 1, wherein the sealing plug (2) comprises an end cap (21) and a connecting section (22) extending from the end cap (21) to the center of one side surface of the inflatable space (10), an external thread is arranged on the outer peripheral surface of the connecting section (22), the mounting hole (11) is provided with a threaded hole section (11a) for accommodating the connecting section (22) and a hole expanding section (11b) for accommodating the end cap (21), and an internal thread matched and connected with the external thread is arranged on the hole wall of the threaded hole section (11 a).

3. The waterproof and breathable device for a water float according to claim 2, characterized by further comprising a sealing ring (4), wherein the sealing ring (4) is sleeved on the connecting section (22) and is compressed between the end cap (21) and the reaming section (11 b).

4. The device of claim 2, characterized in that the end cap (21) has an annular groove (23) on the side facing away from the connecting section (22), and a tool for rotating the sealing plug (2) holds the sealing plug (2) in the annular groove (23).

5. The device for waterproofing and breathing for a water float according to claim 4, characterized in that the annular groove (23) has an inner ring circumferential wall (23a) and an outer ring circumferential wall (23b), the inner ring circumferential wall (23a) being polygonal and the outer ring circumferential wall (23b) being circular.

6. The waterproof and breathable device for the water floating body of claim 4, characterized in that the annular groove (23) is provided with an inner ring annular wall (23a) and an outer ring annular wall (23b), the breathable holes (20) are positioned in the inner ring annular wall (23a), an end cover (5) which covers the annular groove (23) and the breathable holes (20) is inserted in the annular groove (23), and a clearance channel which communicates the breathable holes (20) with the space outside the floating body (1) is reserved between the end cover (5) and the end cap (21).

7. The water-proof air-permeable device of the water floating body according to claim 6, wherein the end cover (5) comprises a cover plate (51), one side surface of the cover plate (51) facing the annular groove (23) is provided with an outer ring wall (52) contacting with the outer ring wall (23b), an inner ring wall (53) contacting with the inner ring wall (23a) and forming an annular cavity (54) at an interval with the outer ring wall (52), and a protrusion (55) positioned in the inner ring wall (53) and contacting with one side surface of the end cap (21) far away from the connecting section (22), the protrusion (55) makes the cover plate (51) and the end cap (21) form a first interval space (6) communicated with the air vent (20) at an interval, the inner ring wall (53) is provided with a slot (531) communicating the first interval space (6) and the annular cavity (54), the inner ring wall (53) and the outer ring wall (52) and the groove bottom wall (23c) of the annular groove (23) form a second interval space (7) at intervals, and the peripheral side surface of the outer ring wall (52) is provided with a ventilation groove (521) which is used for communicating the second interval space (7) with the space outside the floating body (1).

8. The waterproof and breathable device for the water floating body is characterized in that a concave cavity (24) is formed in the center of one side surface of the connecting section (22) facing the inflatable space (10), one end, close to the inflatable space (10), of the breathable hole (20) penetrates through the cavity bottom wall of the concave cavity (24), and the waterproof and breathable film (3) is arranged on the cavity bottom wall of the concave cavity (24).

9. The waterproof and air-permeable device of the water floating body as claimed in claim 1, wherein a plurality of the air-permeable holes (20) are opened on the sealing plug (2), and the waterproof and air-permeable membrane (3) covers all the air-permeable holes (20) on the side of the sealing plug (2) facing the air-filled space (10).

10. The waterproof and breathable device for the water floating body according to claim 1, characterized in that the waterproof and breathable film (3) and the sealing plug (2) are connected by bonding or welding.