Through-hull sealing device and installation method of its application in an underwater vehicle

Abstract

The present invention relates to the technical field of cable sealing, and provides a through-hull sealing device and an installation method for its application in an underwater vehicle. The through-hull sealing device includes: a pipe body, and a pipe cavity partition divides the pipe cavity to form a first sealing groove and a second sealing groove; the first sealing structure includes a first sealing filler, which fills the gap between the pipe body and the linear entity in the first sealing groove; a first fastener presses the first sealing filler; the second sealing structure includes a second sealing filler, which fills the gap between the pipe body and the linear entity in the second sealing groove; a second fastener presses the second sealing filler; the third sealing structure includes a third sealing filler, which seals and wraps around the second fastener and the linear entity together and is tightly wrapped outside the second fastener; the fourth sealing structure includes a first sealing mold, which covers the third sealing structure and the outer part of the pipe body of the cabin, and fills the fourth sealing filler. Multiple seals ensure that the linear entity does not move and the seal does not leak during underwater navigation, and the sealing effect is safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable sealing installation, and in particular to a cabin penetration sealing device and an installation method thereof in an underwater vehicle. Background Art

[0002] The design of the underwater vehicle's through-cabin electrical system requires the layout of dozens to hundreds of cables from inside the cabin to outside the cabin, and requires a seal between the cabin and the outside environment.

[0003] In particular, there are many types of cables provided by equipment manufacturers, and the materials of the cable outer sheaths are different, which places extremely high demands on sealing devices and sealing methods, especially the characteristics of sealing materials. Therefore, sealing materials, sealing devices and sealing methods are key. The sealing of extravehicular cables is a key process. Before construction, relevant procedures such as process verification and construction process capability confirmation must be performed. The sealing of extravehicular cables is directly related to the product safety of underwater vehicles. Due to the high pressure of the working environment of underwater vehicles (used at a maximum depth of 450-1500 meters underwater), many underwater vehicles are prone to cable sealing failure during use, which has become a technical problem that needs to be solved urgently in the field of cabin cable sealing technology. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a cabin penetration sealing device to solve the problems in the related art.

[0005] The first aspect of the present invention provides a cabin penetration sealing device, comprising: a tube body, which is extended along an axial direction to form a tube cavity for penetrating a linear entity; wherein an annular convex portion is formed on the inner wall of the tube cavity to separate the tube cavity to form a first sealing groove and a second sealing groove; the first sealing groove and the second sealing groove are respectively placed inside and outside the cabin; a first sealing structure, comprising: at least one first sealing filler, which fills the gap between the tube body and the linear entity in the first sealing groove; a first fastener, which enters the first sealing groove, is used to compress the first sealing filler and has a through hole for the linear entity to pass through; the second sealing structure, comprising: to At least one second sealing filler fills the gap between the tube body and the linear entity in the second sealing groove; a second fastener enters the second sealing groove, is used to compress the second sealing filler and has a through hole for the linear entity to pass through; a third sealing structure includes: a third sealing filler, which holds the second fastener and the linear entity together and seals and covers the intersection of the second fastener and the linear entity; a fourth sealing structure includes: a first sealing mold with a first sealing cavity, which seals the third sealing structure and the outer cabin part of the tube body in the first sealing cavity; a fourth sealing filler fills the gap in the first sealing cavity.

[0006] In an embodiment of the first aspect, the through-hull sealing device further includes at least one of the following structures: 1) A fifth sealing structure, including: a fifth sealing filler for filling the gap between the annular protrusion and the linear entity; 2) A sixth sealing structure, including: a sixth sealing filler for filling the gap between the through-hole of the second fastener and the linear entity; 3) A seventh sealing structure, including: a seventh sealing filler for filling the gap between the through-hole of the first fastener and the linear entity; 4) An eighth sealing structure, including: an eighth sealing filler for sealing and wrapping around the outer intersection of the first fastener and the linear entity while tightly holding the first fastener and the linear entity together; A ninth sealing structure, including: a second sealing cavity and a second sealing die for threading out the linear entity, enclosing the eighth sealing structure and the in-hull part of the pipe body in the second sealing cavity; A ninth sealing filler for filling the void in the second sealing cavity.

[0007] In an embodiment of the first aspect, there are two or more first sealing fillers arranged along the axial direction; the first sealing filler is implemented as an elastic material, and a compression washer is provided between adjacent first sealing fillers; and / or, the first sealing filler is a ring structure with a beveled opening. In the case of two or more first sealing fillers, the beveled openings between adjacent first sealing fillers are staggered by a preset angle, and the material of the first sealing filler is implemented as at least one of the following: neoprene, ethylene propylene rubber, nitrile rubber, polyurethane rubber, and polymer composites of any one of them.

[0008] In an embodiment of the first aspect, a compression washer is provided between the first sealing filler and the first fastener and the annular protrusion; and / or, a compression washer is provided between the second sealing filler and the second fastener and the annular protrusion.

[0009] In an embodiment of the first aspect, the compression washer is implemented as any one of the following: 1) The material of the compression washer is one of the following: copper, stainless steel, special engineering plastics; 2) The compression washer is implemented as a stacked structure of multiple V-shaped sealing rings; the material of the V-shaped sealing ring is one of the following: nitrile rubber, neoprene, natural rubber, butyl rubber, chloroprene rubber.

[0010] In an embodiment of the first aspect, when the eighth sealing structure and the ninth sealing structure exist, the first sealing filler is implemented as a mixture of 3D fiber braid and sealant; and / or, the fifth sealing filler is implemented as sealant; and / or, the thickness of the sixth sealing filler is suitable for the through-hole gap between the second fastener and the linear entity, and the sixth sealing filler protrudes from the end hole of the through-hole of the second fastener away from the second sealing filler; and / or, the thickness of the seventh sealing filler is suitable for the through-hole gap between the first fastener and the linear entity, and protrudes from the end hole of the through-hole of the first fastener away from the first sealing filler.

[0011] In an embodiment of the first aspect, the through-hull sealing device is further implemented as at least one of the following structures: 1) there are more than two of the second sealing packings arranged along the axial direction; 2) the second sealing packing is implemented as a mixture of a 3D fiber braid and a sealant; 3) the sealing packing in the clearance between the through-holes of the first fastener and / or the second fastener and the linear entity is formed by a fiber rope mixed with a sealant and axially wound around the outer wall surface of the linear entity; the fiber rope is made of a mixed fiber of one or more materials among carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene; 4) the third sealing packing covering the outside of the second fastener is formed by a fiber rope mixed with a sealant and alternately cross-wound around the outer wall surfaces of the second fastener and the linear entity from opposite sides; and / or, the eighth sealing packing covering the intersection of the first fastener and the linear entity is formed by a fiber rope mixed with a sealant and cross-wound around the outer wall surfaces of the first fastener and the linear entity; 5) the first sealing packing and / or the second sealing packing is implemented as an annular structure with a beveled opening sleeved outside the linear entity; the beveled openings between adjacent first sealing packings are staggered by a preset angle, and / or the beveled openings between adjacent second sealing packings are staggered by a preset angle; 6) the first fastener and the second fastener are in threaded fit with the openings of the first sealing groove and the second sealing groove respectively; 7) the first sealing mold is a columnar body converging towards the outer end; 8) the first sealing mold is a columnar body with a conical outer end; 9) the second sealing packing has a vacuum package with a desiccant for indicating the humidity level built therein.

[0012] The second aspect of the present invention provides a method for installing a through-hull sealing device on an underwater vehicle, which is applied to the installation of the through-hull sealing device according to any one of the first aspect on the underwater vehicle. The method includes: S101: Fix the pipe body on the underwater vehicle hull and let the pipe cavity penetrate the linear entity, and sequentially install the first sealing packing and the first fastener in the first sealing groove to form a first sealing structure; S103: Sequentially install the second sealing packing and the second fastener in the second sealing groove to form a second sealing structure; S105: Use the third sealing packing to tightly hold the second fastener and the linear entity and hermetically cover the intersection of the second fastener and the linear entity; S107: Use the first sealing mold to cover the third sealing structure and the external part of the pipe body in the first sealing cavity, and pour the fourth sealing packing into the first sealing cavity from the gap.

[0013] In an embodiment of the second aspect, the underwater vehicle is a manned underwater vehicle, and there are two or more first sealing packings arranged along the axial direction; the first sealing packing is implemented as an elastic material, and a compression washer is provided between adjacent first sealing packings; the first fastener is exposed; alternatively, the underwater vehicle is an unmanned underwater vehicle, and the through-hull sealing device includes an eighth sealing structure and a ninth sealing structure covering the outside of the first fastener.

[0014] In an embodiment of the second aspect, it further includes at least one of the following: 1) Before S103, it further includes: filling the gap between the annular convex part and the linear entity with a fifth sealing packing; 2) Before installing the second fastener, forming a sixth sealing packing sleeved outside the linear entity and having a thickness suitable for the through-hole gap between the second fastener and the linear entity, so as to fill the gap between the through-hole of the second fastener and the linear entity when installing the second fastener; 3) Before installing the first fastener, forming a seventh sealing packing sleeved outside the linear entity, so as to fill the gap between the through-hole of the first fastener and the linear entity when installing the first fastener; 4) After installing the first fastener, sealing and covering the first fastener and the linear entity together by an eighth sealing packing at the intersection of the outside of the first fastener and the linear entity; covering the third sealing structure and the in-cabin part of the pipe body in the second sealing cavity of the second sealing mold, and pouring a ninth sealing packing into the second sealing cavity from the gap; 5) Installing compression washers before and after installing each first sealing packing; and / or, installing compression washers before and after installing the second sealing packing; 6) When installing the first sealing packing and / or the second sealing packing, applying a sealant as a lubricant; 7) When using the sealant to fill the gap, determining the gap where the sealant overflows.

[0015] As described above, the present invention relates to the technical field of sealing, and provides a through-hull sealing device and an installation method thereof applied to an underwater vehicle. The through-hull sealing device includes: a pipe body, and a pipe cavity divides the pipe cavity into a first sealing groove and a second sealing groove; the first sealing structure includes a first sealing packing for filling the gap between the pipe body and the linear entity in the first sealing groove; a first fastener compresses the first sealing packing; the second sealing structure includes a second sealing packing for filling the gap between the pipe body and the linear entity in the second sealing groove; a second fastener compresses the second sealing packing; the third sealing structure includes a third sealing packing for sealing and covering the second fastener and the linear entity together outside the second fastener; the fourth sealing structure includes a first sealing mold for covering the third sealing structure and the out-of-cabin part of the pipe body and filling a fourth sealing packing. Multiple seals ensure that the linear entity does not move and there is no leakage during the underwater navigation process, and the sealing effect is safe and reliable. Description of the Drawings

[0016] Figure 1Show a schematic structural view of the cabin-penetrating sealing device in an embodiment of the present invention.

[0017] Figure 2 Show a schematic structural view of the first sealing filler in an embodiment of the present invention.

[0018] Figure 3 Show a schematic structural view of the second sealing filler in an embodiment of the present invention.

[0019] Figure 4 Show a schematic structural view of the strip-shaped sealing body for constructing the second sealing filler in an embodiment of the present invention.

[0020] Figure 5 Show a schematic structural view of the compression washer in an embodiment of the present invention.

[0021] Figure 6 Show a schematic cross-sectional structural view of the compression washer in another embodiment of the present invention.

[0022] Figure 7 Show a schematic structural view of the cabin-penetrating sealing device in another embodiment of the present invention.

[0023] Figure 8 Show a schematic flow chart of the installation method of the cabin-penetrating sealing device in an embodiment of the present invention.

[0024] Reference numerals:

[0025] Cabin-penetrating sealing device 100; pipe body 101; annular convex portion 1011; first sealing groove 1012; second sealing groove 1013; first sealing filler 102; first fastener 103; first compression washer 104; second compression washer 105; third compression washer 106; second sealing filler 107; strip-shaped sealing body 107a; second fastener 108; third sealing filler 110; first sealing mold 111; fourth sealing filler 112; fifth sealing filler 113; sixth sealing filler 114; seventh sealing filler 115; eighth sealing filler 116; second sealing mold 117; ninth sealing filler 118; fourth compression washer 119; fifth compression washer 120; pressure-resistant body 200; linear entity 300; support ring 401; sealing ring 402; pressure ring 403. Detailed description of the invention

[0026] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the information disclosed by the present invention. The present invention can also be implemented or applied through other different specific embodiments, and various details of the present invention can also be modified or changed according to different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0027] The following takes the drawings as a reference and details the embodiments of the present invention so that those skilled in the technical field to which the present invention pertains can easily implement it. The present invention can be embodied in many different forms and is not limited to the embodiments described herein.

[0028] In the description of the present invention, the reference terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics represented in connection with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics represented can be combined in a suitable manner in any one or a group of embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples represented in the present invention and the features of different embodiments or examples.

[0029] In addition, the terms "first" and "second" are only used for the purpose of indication and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a group" is two or more, unless otherwise specifically defined.

[0030] To clearly illustrate the present invention, devices irrelevant to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0031] Throughout the specification, when it is said that a device is "connected" to another device, this includes not only the case of "direct connection", but also the case of "indirect connection" with other elements placed therebetween. In addition, when it is said that a certain device "includes" a certain component, unless there is a particularly contrary record, it does not exclude other components, but means that other components can also be included.

[0032] Although, in some examples, the terms first, second, etc. are used herein to denote various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first interface and a second interface, etc. are indicated. Further, as used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms, unless the context indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the stated features, steps, operations, elements, modules, items, kinds, and / or groups, but do not preclude the presence, occurrence, or addition of one or a group of other features, steps, operations, elements, modules, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C". An exception to this definition occurs only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0033] The technical terms used herein are only for referring to specific embodiments and are not intended to limit the present invention. The singular forms used herein also include the plural forms as long as the context does not clearly indicate the contrary meaning. The meaning of "including" used in the specification is to embody specific characteristics, regions, integers, steps, operations, elements, and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0034] Although not differently defined, all terms, including the technical terms and scientific terms used herein, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms defined in commonly used dictionaries are additionally interpreted to have meanings consistent with the relevant technical literature and the currently presented information. As long as they are not defined, they should not be over-interpreted as ideal or overly formulaic meanings.

[0035] In the related technologies, the design of the underwater vehicle's through-cabin electrical system requires the layout of a large number of cables from inside the cabin to outside the cabin, and these cables need to be sealed between the inside and outside environments. However, due to the wide variety of cables and the different materials of the cable outer sheath, extremely high requirements are placed on the sealing device and sealing method, especially the characteristics of the sealing material. Therefore, the sealing material, sealing device and sealing method are key. The sealing of the cable outside the cabin is a key process. Before construction, relevant procedures such as process verification and construction process capability confirmation must be performed. The sealing work of the cable outside the cabin is directly related to the product safety of the underwater vehicle. Due to the high pressure of the working environment of the underwater vehicle (used at a maximum underwater depth of 450-1500 meters), many underwater vehicles are prone to cable sealing failure during use, which has become a technical problem that needs to be solved urgently in the field of through-cabin cable sealing technology.

[0036] In view of this, an embodiment of the present invention provides a cabin penetration sealing device to solve the above-mentioned technical problems through multiple sealing.

[0037] like Figure 1 As shown, a schematic diagram of the structure of a cabin penetration sealing device in one embodiment of the present invention is shown.

[0038] The penetration sealing device 100 includes a tube body 101, and the tube body 101 is fixed to a pressure-resistant body 200, and the fixing method may include, for example, welding. The two ends of the tube body 101 are open and form a tube cavity, which can be used for the linear entity 300 to pass through. In some embodiments, the linear entity 300 can be a cable or a pipeline. In some embodiments, the pressure-resistant body 200 can be a hull of an underwater vehicle. In some embodiments, the tube body 101 can be implemented as a cup-type pipe joint, which is a special pipe fitting used to connect pipes.

[0039] The inner wall of the tube cavity forms an annular convex portion 1011 to separate the tube cavity into a first sealing groove 1012 and a second sealing groove 1013; the first sealing groove 1012 and the second sealing groove 1013 are respectively placed inside and outside the cabin. The central through hole of the annular convex portion 1011 can be passed through by the linear entity 300.

[0040] In order to seal the linear entity 300 to the tube body 101 , the cabin penetration sealing device 100 further includes: a first sealing structure, a second sealing structure, a third sealing structure, and a fourth sealing structure.

[0041] The first sealing structure is used to seal the in-cabin part of the linear entity 300 and the pipe body 101. The first sealing structure includes at least one first sealing filler 102 and a first fastener 103. The at least one first sealing filler 102 fills the gap between the pipe body 101 and the linear entity 300 in the first sealing groove 1012 to form a seal. The first fastener 103 enters the first sealing groove 1012, is used to press the first sealing filler 102 and has a through hole for the linear entity 300 to pass through.

[0042] In Figure 1 the embodiment, the number of the first sealing fillers 102 can be two or more. As an example, the two first sealing fillers 102 are arranged axially along the lumen in the first sealing groove 1012, and the annular convex portion 1011 constitutes a stop for one side of the first sealing filler 102. The first fastener 103 enters from the notch of the first sealing groove 1012 and reaches a position where it abuts against the other side of the first sealing filler 102 to clamp the first sealing filler 102 therebetween with the annular convex portion 1011.

[0043] As Figure 2 shown, a schematic structural diagram of the first sealing filler 102 in an embodiment of the present invention is shown. In Figure 2 it, the first sealing filler 102 is implemented as an annular structure with a beveled opening sleeved outside the linear entity 300. In some embodiments, when two or more first sealing fillers 102 are provided, the beveled openings between adjacent first sealing fillers 102 are staggered by a preset angle, so as to avoid the problem that the elastic force difference between the beveled opening and other positions of multiple first sealing fillers 102 is relatively large in the circumferential direction. In a further optional embodiment, the beveled openings of two or more first sealing fillers 102 can be evenly arranged in the circumferential direction. For example, the beveled openings are staggered by 180° in the circumferential direction between two beveled openings, and staggered by 120° in the circumferential direction between three beveled openings, and so on.

[0044] In some embodiments, the first sealing filler 102 is implemented as an elastic material, and its material is implemented as at least one of the following: chloroprene rubber, ethylene propylene rubber, nitrile rubber, polyurethane rubber, and polymer composites of any one of them. The first sealing filler 102 made of elastic material is simply referred to as "elastic filler". The elastic filler can adaptively elastically change under external pressure and temperature changes, and at the same time can effectively resist pressure changes to tightly seal the cable to form a dynamic seal. Further, the number of the elastic fillers can be two or more ( Figure 1In the example (there are two in the figure), there are more than two arranged along the axial direction (which can be respectively defined as the first elastic packing and the second elastic packing), and a first pressing washer 104 can be provided between adjacent first sealing packings 102. By providing more than two of the elastic packings, compared with a single elastic packing, a greater elastic deformation amount can be obtained when bearing pressure, so as to better relieve the pressure. In some embodiments, the upper and lower surfaces of the elastic packing can be flat to be in planar contact with the pressing washer, maintaining good sealing performance. In some embodiments, the height of the plurality of elastic packings can account for a predetermined proportion of the depth of the first sealing groove 1012, for example, 60% - 70%.

[0045] In some embodiments, a second pressing washer 105 is provided between the first sealing packing 102 and the first fastener 103, and a third pressing washer 106 can also be provided between the first sealing packing 102 and the annular protrusion 1011. That is, from the annular protrusion 1011 at the bottom of the first sealing groove 1012 to the groove opening, a third pressing washer 106, a first elastic packing, a first pressing washer 104, a second elastic packing, a second pressing washer 105, and a first fastener 103 are arranged in sequence. In an alternative embodiment, to avoid gaps being left between the third pressing washer 106 and the annular protrusion 1011 and the groove wall of the first sealing groove 1012 when the third pressing washer 106 is installed, the third pressing washer 106 can be immersed in sealant and then placed at the bottom of the first sealing groove 1012, and it is confirmed that it is in place and the sealant overflows from the gap to ensure that the gap is exhausted of air.

[0046] In some embodiments, the first fastener 103 can be implemented as a first pressing nut, which is in threaded cooperation with the groove wall surface of the opening of the first sealing groove 1012. By rotating the first pressing nut, it can enter the first sealing groove 1012 to press and fix the first sealing packing 102 to fix the in-cabin part of the linear entity. Among them, the first sealing packing 102, etc. will undergo a lateral expansion deformation under the pressure of the first fastener 103 to eliminate the gap between the linear entity 300 and the pipe body 101 and press against the linear entity 300, realizing fastening and sealing the linear entity 300 in the first sealing groove 1012. In some embodiments, the axial position where the first fastener 103 enters the opening of the first sealing groove 1012 in place can be determined according to the fastening torque of the first fastener 103 reaching a preset value.

[0047] It can be understood that in other embodiments, the first fastener 103 can also be implemented as other mechanisms that can be axially positioned after movement, such as a linear motion mechanism driven and locked by a cylinder or a motor, etc., not limited to the above-mentioned threaded parts.

[0048] Thus, through the first sealing structure, the first sealing packing 102 is compressed by the first fastener 103 to expand and tightly hold the linear entity and abut against the wall surface of the lumen to form a seal; and, the gaps between the first pressing washer 104, the second pressing washer 105, the third pressing washer 106 and the linear entity 300 and the inner wall of the lumen are filled with sealant to form a bonded seal, achieving the effect of fastening the linear entity and double sealing (sealing by the first sealing packing 102 and bonding and sealing by the pressing washer combined with sealant).

[0049] The second sealing structure includes at least one second sealing packing 107 and a second fastener 108. The at least one second sealing packing 107 fills the gap between the pipe body 101 and the linear entity 300 in the second sealing groove 1013. The second fastener 108 enters the second sealing groove 1013 for compressing the second sealing packing 107 and has a through hole for the linear entity 300 to pass through.

[0050] As Figure 3 shown, a schematic structural view of the second sealing packing 107 in an embodiment of the present invention is shown.

[0051] In Figure 3 , a schematic structural view of the second sealing packing 107 is shown as an annular structure with a beveled opening sleeved outside the linear entity 300. Again, as Figure 4 shown, a strip-shaped sealing body 107a is shown, and the cross-section of the strip-shaped sealing body 107a can be, for example, square. The second sealing packing 107 is made after the strip-shaped sealing body 107a is bent annularly and a beveled opening is cut out.

[0052] In some embodiments, the second sealing packing 107 is implemented as a mixture of 3D fiber braid and sealant. 3D means that the fibers are braided in a 3D structure. Specifically, the 3D fiber braid includes an outer mesh layer, an inner mesh layer, and a core wire connection layer. The core wires in the core wire connection layer connect the outer mesh layer and the inner mesh layer in an X-90° vertical cross-supporting manner, which can provide better support and buffering protection. In some embodiments, the 3D fiber braid is implemented as a mixed fiber of one or more materials among carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene. The 3D fiber braided packing can elastically change along with external pressure and temperature changes, and can dynamically and effectively fasten and seal the linear entity 300 at the same time. And, since the second sealing groove 1013 will be placed outside the cabin, especially in the high-pressure scenario where the underwater vehicle works at a depth of 400 - 1500 meters underwater, using a 3D fiber braid to construct the second sealing packing 107 can obtain better compressive strength.

[0053] In some embodiments, the second sealing packing 107 has a vacuum package with a desiccant for indicating the humidity level built therein to extend its service life. The desiccant may change color, for example, when the water absorption reaches a certain level to indicate the need for drying. Thus, according to this indication, the performance can be restored and the service life can be extended by thermally drying or air-drying the second sealing packing 107.

[0054] In some embodiments, there may be two or more second sealing packings 107 arranged axially. Figure 1 Two are exemplified herein. In some embodiments, a fourth compression washer 119 may be provided between the second sealing packing 107 near the annular convex portion 1011 and the annular convex portion 1011, and a fifth compression washer 120 may be provided between the second sealing packing 107 far from the annular convex portion 1011 and the second fastener 108. That is, the fourth compression washer 119, two or more second sealing packings 107, the fifth compression washer 120, and the second fastener 108 are successively installed from the annular convex portion 1011 at the bottom of the second sealing groove 1013 to the notch. In an alternative embodiment, to prevent a gap from being left between the fourth compression washer 119 and the annular convex portion 1011 and the groove wall of the second sealing groove 1013 when the fourth compression washer 119 is installed, the fourth compression washer 119 may be immersed in sealant and then placed at the bottom of the second sealing groove 1013, and it is confirmed that it is in place and the sealant overflows from the gap to ensure that the gap is completely vented.

[0055] In some embodiments, when two or more second sealing packings 107 are provided, the inclined openings of adjacent first sealing packings 102 are staggered by a preset angle to avoid a large difference in elastic force between the inclined openings and other positions of the plurality of second sealing packings 107 in the circumferential direction. In a further alternative embodiment, the inclined openings of two or more second sealing packings 107 may be evenly arranged in the circumferential direction. For example, the inclined openings are staggered 180° in the circumferential direction between two inclined openings, and 120° in the circumferential direction between three inclined openings, and so on.

[0056] In some alternative embodiments, when installing the second sealing packing 107 into the second sealing groove 1013, sealant can be first applied on the surface of the second sealing packing 107, and then the second sealing packing 107 bent into a ring shape can be wrapped and sleeved outside the linear entity. The inclined surface opening can be formed by cutting the second sealing packing 107. The applied sealant not only plays a sealing role in filling the gap, but also acts as a lubricant. The inclined surface opening is exemplified by 45° or other inclination angles. Each of the second sealing packings 107 is installed into the second sealing groove 1013 in the above manner. After installing the first second sealing packing 107, a tool can be used to apply force to it to tamp it down (without touching the inner wall of the lumen) until it fits against the bottom of the first sealing groove 1012. In some alternative embodiments, after installing each second sealing packing 107, the exposed gap (including the annular gap between the second sealing packing 107 and the inner wall of the lumen) can be filled with glue, and it can be ensured that the sealant overflows from the gap to ensure complete exhaust of the gap.

[0057] Thus, through the second sealing structure, the second sealing packing 107 is pressed by the second fastener 108 to expand and tightly hold the linear entity and abut against the wall surface of the lumen to form a seal, and the sealant can be used to fill the gap to ensure the sealing effect; in addition, the gaps between the fourth pressing washer 119, the fifth pressing washer 120 and the linear entity 300 and the inner wall of the lumen are all filled with sealant to form a bonded seal, achieving the effect of fastening and double-sealing the linear entity.

[0058] In some embodiments, the second fastener 108 can be implemented as a second pressing nut, which is in threaded cooperation with the notch wall surface of the second sealing groove 1013. By rotating the second pressing nut, it can enter into the second sealing groove 1013 to press and fix the second sealing packing 107 to fix the external part of the linear entity outside the cabin. Among them, the second sealing packing 107 and the like will undergo a lateral expansion deformation under the pressure of the second fastener 108 to eliminate the gap between the linear entity 300 and the pipe body 101 and press against the linear entity 300, so as to fasten and seal the linear entity 300 in the second sealing groove 1013. In some embodiments, the axial position of the second fastener 108 entering the notch of the second sealing groove 1013 can be determined according to the fastening torque of the second fastener 108 reaching a preset value.

[0059] It can be understood that in other embodiments, the second fastener 108 can also be implemented as other mechanisms that can move and then locate the axial position, such as a linear motion mechanism driven and locked by a cylinder or a motor, etc., not limited to the above-mentioned threaded parts.

[0060] In some embodiments, the compression washers used (such as the first compression washer 104 to the fifth compression washer 120) are implemented as at least one of the following materials: red copper, stainless steel, special engineering plastics (such as PEEK, POM, etc.). As Figure 5 shown, in the structural schematic diagram taking the first compression washer 104 as an example, two or other numbers of small holes 1041 can be drilled on the surface of the first compression washer 104 to facilitate disassembly and removal. It can be understood that the other second compression washer 105, third compression washer 106, fourth compression washer 119, fifth compression washer 120, etc. can also be Figure 5 the planar structure in. However, due to different installation positions, the third compression washer 106 and the fourth compression washer 119 can be combined with the annular convex portion 1011, so the structure can be slightly different from that of the first compression washer 104, the second compression washer 105, and the fifth compression washer 120. For example, one side of the third compression washer 106 and the fourth compression washer 119 can have a protruding structure (such as a continuous ring, a ring segment, a plunger, etc.) that is shaped to be inserted into the circular hole of the annular convex portion 1011, so that the third compression washer 106 and the fourth compression washer 119 can be presented as "T" - shaped on the side, while both sides of the first compression washer 104, the second compression washer 105, and the fifth compression washer 120 can be flat surfaces without protruding structures.

[0061] In some other embodiments, the first compression washer 104 to the fifth compression washer 120 can also be implemented as a stacked structure of multiple V - shaped sealing rings. For example, in Figure 6The structure of the cross-section of multiple V-shaped sealing rings shown in the figure. The overlapping structure of the multiple V-shaped sealing rings includes a support ring 401, a sealing ring 402, and a pressure ring 403 that are sequentially overlapped along the axial direction. The support ring 401, the sealing ring 402, and the pressure ring 403 are coaxially arranged and are all formed with through holes corresponding in position for a target object (such as a linear entity 300) to pass through. The ring surface of the support ring 401 facing the sealing ring 402 and the ring surface of the sealing ring 402 facing the pressure ring 403 are V-shaped convex surfaces. The ring surface of the sealing ring 402 facing the support ring 401 and the ring surface of the pressure ring 403 facing the sealing ring 402 are V-shaped concave surfaces. The V-shaped convex surface and the V-shaped concave surface are combined in a shape-matching manner to form a good seal. As an example, the ring surface of the pressure ring 403 facing away from the sealing ring 402 can be a plane. In the application scenario of the embodiment of the present invention, when the third compression washer 106 and the fourth compression washer 119 are implemented as the overlapping structure of multiple V-shaped sealing rings, the ring surface corresponding to the annular convex portion 1011 is set to be the plane of the pressure ring 403, so that it can closely abut against the annular convex portion 1011. When the second compression washer 105 and the fifth compression washer 120 are implemented as the overlapping structure of multiple V-shaped sealing rings, the ring surface corresponding to the first fastener 103 / second fastener 108 is set to be the plane of the pressure ring 403 to closely abut against. In some embodiments, the material of the V-shaped sealing ring is one of the following: nitrile rubber, neoprene, natural rubber, butyl rubber, chloroprene rubber.

[0062] The third sealing structure includes a third sealing packing 110. The third sealing packing 110 tightly holds the second fastener 108 and the linear entity 300 together and is hermetically wrapped around the intersection of the outside of the second fastener 108 and the linear entity 300. Through the third sealing packing 110, the second fastener 108 and the linear entity 300 can be fastened, and a seal between the outside and the inside of the second fastener 108 is also formed by completely wrapping the surface of the second fastener 108 exposed outside the second sealing groove 1013 and tightly holding the linear entity.

[0063] In some embodiments, the third sealing packing 110 comprises a mixture of a fiber rope and a sealant. Optionally, the fiber rope is, for example, a mixed fiber material of one or more of carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene. In some embodiments, the second fastener 108 includes a connected cylindrical portion and an end portion, the cylindrical portion being coupled to the second sealing groove 1013 (such as by screw-threading), and the radial length of the end portion being greater than that of the cylindrical portion. The fiber rope mixed with (such as impregnated with) the sealant can be first wound circumferentially around the cylindrical portion and extended towards the end portion, and then cross-wound around the end portion and the linear entity 300 to tightly hold the second fastener 108 and the linear entity 300 together for covering and sealing, thereby completing the arrangement of the third sealing packing 110. As an example, the cross-winding can be, for example, starting from one side (such as the left / right side) of the second fastener 108 and winding obliquely up / down to the opposite side (such as the right / left side) of the linear entity 300. After winding circumferentially around the linear entity 300 back to this starting side, then winding obliquely down / up to the opposite side of the linear entity 300 to form a cross, and then winding circumferentially back to this starting side. This is repeated and can be cross-wound or wound in other ways and extended until it is in close contact with the end of the pipe body 101 ( Figure 1 shown as the upper end in the figure) to completely cover the outer surface of the second fastener 108 and the gap between the second fastener 108 and the end of the pipe body 101, thereby completing the sealing arrangement of the third sealing packing 110. By adopting the cross-winding method, the relative movement between the linear entity 300 and the second fastener 108 can be restricted in more directions, so that the two are not easily separated to generate a gap, ensuring a good sealing effect. It should be particularly noted that the cross-winding method exemplified above is only a schematic illustration, and it can be changed in actual scenarios. For example, after winding obliquely in one direction for multiple turns, then cross-winding obliquely in another direction for multiple turns, etc., and is not limited by the above example. Through the cross-winding of the third sealing packing 110, a tapered seal as Figure 1 shown in the figure can be formed, and the tapered winding needs to be tight and round.

[0064] The fourth sealing structure includes a first sealing mold 111 and a fourth sealing filler 112. The first sealing mold 111 has a first sealing cavity. The first sealing mold 111 encloses the third sealing structure and the external part of the pipe body 101 in the first sealing cavity. The fourth sealing filler 112 fills the gaps in the first sealing cavity to form a seal between the third sealing structure, the pipe body 101, etc. and the external environment. Specifically, the first sealing mold 111 is fixedly installed on the pressure-resistant body 200 to form a gap to be sealed between the inner wall of the first sealing cavity, the pipe body 101, the third sealing structure, and the linear entity 300 passing through the third sealing structure. The fourth sealing filler 112 is exemplified as sealant, which can be poured into the first sealing cavity from the gaps of the first sealing mold 111 (such as the gap between the linear entity 300) to fill the gaps, and after curing, the fourth sealing structure is formed.

[0065] In some embodiments, the first sealing mold 111 can be selected as a columnar body converging towards one end. For example, the first sealing mold 111 is a columnar body with a tapered outer end, such as an overall spindle shape. Through the specific shape of the columnar body converging towards one end, the first sealing mold 111 can effectively relieve the pressure impact of the fluid on the cabin sealing device and enhance the sealing reliability.

[0066] To enhance the sealing effect, in some embodiments, the through-cabin sealing device 100 may further include a fifth sealing structure for sealing between the annular convex portion 1011 and the linear entity 300. Specifically, the fifth sealing structure includes a fifth sealing filler 113 that fills the gap between the annular convex portion 1011 and the linear entity 300. In some embodiments, the fifth sealing filler 113 is implemented as sealant. Specifically, after installing the first sealing structure, sealant can be poured into the annular convex portion 1011 from one side of the second sealing groove 1013 to fill the gap between the annular convex portion 1011 and the linear entity 300. Preferably, the poured sealant can at least completely cover the bottom of the second sealing groove 1013 to reduce and eliminate the gap with the fourth compression gasket 119. Moreover, in cooperation with the third compression gasket 106 and the fourth compression gasket 119 being pre-impregnated with sealant when inserted into the pipe cavity and the sealant overflowing from the gap after installation, it can effectively ensure the elimination of the gap and guarantee the sealing effect.

[0067] To enhance the sealing effect, in some embodiments, the through-hull sealing device 100 may further include a sixth sealing structure for sealing between the through-hole of the second fastener 108 and the linear entity 300. Specifically, the sixth sealing structure includes a sixth sealing filler 114 that fills the gap between the through-hole of the second fastener 108 and the through-hole of the linear entity 300. In some embodiments, the width of the sixth sealing filler 114 may be suitable for the through-hole gap. The length of the sixth sealing filler 114 is set such that one end abuts against the fifth pressing washer 120, and the other end may protrude from the through-hole of the second fastener 108 away from the orifice of the end of the second sealing filler 107 and connect with the third sealing structure to minimize the gap as much as possible, so that the sealant can easily fill the gap. In some embodiments, the sixth sealing filler 114 includes a mixture of a fiber rope and a sealant. Optionally, the fiber rope is made of a mixed fiber of one or more materials such as carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene. As an example, the sixth sealing filler 114 can be formed by helically winding a fiber rope mixed with a sealant around the linear entity 300, and the winding is made to have a width suitable for the through-hole gap and a length such that one end of the sixth sealing filler 114 protrudes from the orifice. Thus, when the second fastener 108 is installed, the sixth sealing filler 114 fills into the through-hole gap between the second fastener 108 and the linear entity 300 as the second fastener 108 penetrates into the second sealing groove 1013, without hindering the penetration of the second fastener 108. In some embodiments, the sixth sealing filler 114 may also be pre-wound around at least a part of the fifth pressing washer 120 to enhance the sealing effect.

[0068] Figure 1 In the embodiments, a through-hull sealing device 100 with six sealing structures corresponding to inside and outside the cabin is provided. Through multiple sealing structures, a reliable sealing effect for an underwater vehicle can be provided. Exemplarily, Figure 1 The through-hull sealing device 100 in the embodiments can be applied to a manned underwater vehicle. The user can choose whether to tighten the first fastener 103 on the inside of the cabin according to the actual loosening of the seal to maintain the sealing effect, realizing the manual dynamic adjustment of the sealing effect.

[0069] In still some other embodiments, for an unmanned underwater vehicle or a manned underwater vehicle that does not require manual adjustment of the seal, the side of the first sealing groove 1012 can be directly sealed and closed.

[0070] As Figure 7 shown, a schematic structural diagram of the through-hull sealing device 100 in another embodiment of the present invention is presented.

[0071] In Figure 7In [the above], in addition to the first to sixth sealing structures, the through-hull sealing device 100 may further include a seventh sealing structure, an eighth sealing structure, and a ninth sealing structure to achieve a symmetric sealing structure inside and outside the cabin. It should be noted that in the symmetric sealing structure inside and outside the cabin, since there is no longer a need for manual adjustment by the user, the elastic requirement for the first sealing packing 102 is reduced. Then, the first sealing packing 102 may not use the elastic packing described in the previous embodiments, but may choose to use the material of the second sealing packing, such as a 3D fiber braid or a non-3D fiber braid with relatively low strength. Also, the setting of the first compression washer 104 is no longer necessary. Figure 7 Eliminated in

[0072] It should be specifically noted that the fifth, sixth, and seventh sealing structures are optional settings and are not limited to the illustration shown.

[0073] The seventh sealing structure is used for sealing between the through-hole of the first fastener 103 and the linear entity 300. The implementation of the seventh sealing structure can refer to the sixth sealing structure. Specifically, the seventh sealing structure includes a seventh sealing packing 115 that fills the through-hole gap between the through-hole of the first fastener 103 and the through-hole of the linear entity 300. In some embodiments, the width of the seventh sealing packing 115 may be suitable for the through-hole gap. The length of the seventh sealing packing 115 is set such that one end can abut against the fifth compression washer 120, and the other end can protrude from the through-hole of the first fastener 103 away from the end orifice of the second sealing packing 107 and connect to the third sealing structure to minimize the gap as much as possible, and the sealant can easily fill the gap. In some embodiments, the seventh sealing packing 115 includes a mixture of a fiber rope and a sealant. Optionally, the fiber rope is, for example, a mixed fiber material of one or more of carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene. As an example, the seventh sealing packing 115 can be formed by helically winding a fiber rope mixed with a sealant around the linear entity 300, and the winding is made to have a width suitable for the through-hole gap and a length such that one end of the seventh sealing packing 115 protrudes from the orifice. Thus, when installing the first fastener 103, the seventh sealing packing 115 fills the through-hole gap between the first fastener 103 and the linear entity 300 as the first fastener 103 penetrates into the second sealing groove 1013 and does not hinder the penetration of the first fastener 103. In some embodiments, the seventh sealing packing 115 may also be pre-wound around at least a part of the second compression washer 105 to enhance the sealing effect.

[0074] The eighth sealing structure is used for sealing between the through hole of the first fastener 103 and the linear entity 300. The eighth sealing structure includes an eighth sealing filler 116, and the eighth sealing filler 116 tightly holds the first fastener 103 and the linear entity 300 together and is hermetically coated outside the first fastener 103 at the intersection with the linear entity 300. The implementation of the eighth sealing structure can refer to the third sealing structure. The first fastener 103 can be a compression nut that is the same as or similar to the second fastener 108, including a connected cylindrical part and an end part. The eighth sealing filler is similar to the third sealing filler 110. In some embodiments, the eighth sealing filler 116 includes a mixture of a fiber rope and a sealant. Optionally, the fiber rope is made of a mixed fiber of one or more materials such as carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene. In some embodiments, the eighth sealing filler 116 can be provided by winding the fiber rope mixed with (such as impregnated with) the sealant around the first fastener 103 and the in-cabin part of the linear entity 300 in a circumferential or crosswise manner.

[0075] The implementation of the ninth sealing structure is similar to that of the fourth sealing structure. The ninth sealing structure includes: a second sealing die 117 having a second sealing cavity and for threading out the linear entity 300, and a ninth sealing filler 118. The second sealing die 117 encloses the eighth sealing structure and the in-cabin part of the pipe body 101 in the second sealing cavity. The ninth sealing filler 118 fills the voids in the second sealing cavity. Specifically, the second sealing die 117 is fixedly installed on the pressure-resistant body 200 to form a void to be sealed between the inner wall of the second sealing cavity and the pipe body 101, the eighth sealing structure, and the linear entity 300 passing through the eighth sealing structure. The ninth sealing filler 118 is exemplified as a sealant, which can be poured into the second sealing cavity from the gaps of the second sealing die 117 (such as the gap between the second sealing die 117 and the linear entity 300, etc.) to fill the voids, and after curing, the ninth sealing structure is formed.

[0076] Through the nine sealing structures, a leak-free sealing effect can be ensured in the high-pressure environment of underwater navigation, and there is no need for manual adjustment of the seal, which is very suitable for unmanned underwater vehicles.

[0077] In some embodiments, the sealant can include epoxy adhesive, silicone adhesive, acrylate adhesive, polyurethane adhesive, or poly-modified polyurethane adhesive. In a further preferred embodiment, the sealant can be a two-component (weight ratio of component A: component B = 1:1), viscous vacuum-filled sealant (double-tube glue). Use a double-tube glue gun to extrude the glue through a mixing tube, so that the two-component sealant is fully vacuum-mixed in the mixing tube and then extruded through the double-tube glue cavity for use.

[0078] An underwater vehicle described in an embodiment of the present invention includes a cabin body and a through-cabin sealing device 100 fixedly arranged on the cabin body. The through-cabin sealing device 100 can be selected as the structure shown in any previous embodiment. For example Figure 1 , Figure 7 or a through-cabin sealing device 100 with a sealing structure combination that can choose to set / not set an optional sealing structure.

[0079] As Figure 8 shown, it is a schematic flow chart of the installation method of the through-cabin sealing device 100 applied to an underwater vehicle in an embodiment of the present invention. The installation method can be applied to the installation of the through-cabin sealing device 100 in the previous embodiment.

[0080] The method includes:

[0081] S101: Fix the pipe body 101 on the underwater vehicle cabin body and let the pipe cavity penetrate through the linear entity 300. Install the first sealing packing 102 and the first fastener 103 in the first sealing groove 1012 in sequence to form a first sealing structure.

[0082] In some embodiments, if there are multiple first sealing packings 102, the first pressing washer 104, the first first sealing packing 102, the second pressing washer 105, the second first sealing packing 102, the third pressing washer 106, and the first fastener 103 can be installed in the first sealing groove 1012 in sequence to form a first sealing structure.

[0083] Optionally, in the embodiment of the through-cabin sealing device 100 with six sealing structures, the first sealing packing 102 can be selected as an elastic packing.

[0084] In an alternative embodiment, to avoid leaving a gap between the third pressing washer 106 and the annular protrusion 1011 and the groove wall of the first sealing groove 1012 when installing the third pressing washer 106, the third pressing washer 106 can be immersed in sealant and then placed at the bottom of the first sealing groove 1012, and it is confirmed that it is in place and the sealant overflows from the gap to ensure that the gap is exhausted of air.

[0085] In an alternative embodiment, when installing one of the first sealing packing 102, the first pressing washer 104, and the second pressing washer 105, sealant can be injected to fill the gap.

[0086] In an alternative embodiment, when the first fastener 103 is tightened in place (which can be determined according to the torque reaching a preset value), a certain first thread allowance can be left outside the notch of the first sealing groove 1012.

[0087] Optionally, before installing the second fastener 108, a sixth sealing filler 114 is formed outside the linear entity 300 with a thickness suitable for the through-hole gap between the second fastener 108 and the linear entity 300, so as to fill the gap between the through-hole of the second fastener 108 and the linear entity 300 when installing the second fastener 108.

[0088] In some embodiments, the width of the sixth sealing filler 114 may be suitable for the through-hole gap. The length of the sixth sealing filler 114 is set such that one end can abut against the fifth pressing washer 120, and the other end can protrude from the through-hole of the second fastener 108 away from the orifice of the second sealing filler 107 to connect with the third sealing structure, so as to minimize the gap as much as possible and the sealant can easily fill the gap. In some embodiments, the sixth sealing filler 114 includes a mixture of a fiber rope and a sealant. Optionally, the fiber rope is made of a mixed fiber material of one or more of carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene. As an example, the sixth sealing filler 114 can be formed by helically winding a fiber rope mixed with a sealant around the linear entity 300.

[0089] In an alternative embodiment, when placing the fifth pressing washer 120, a section of the sixth sealing filler 114 (i.e., a fiber rope mixed with a sealant) is wound around the fifth pressing washer 120, and the fiber rope soaked with the sealant is tightly helically wound around the linear entity 300 outside the fifth pressing washer 120. Sealant is injected between the outside of the fifth pressing washer 120 and the surface of the linear entity 300, and the injection amount is estimated according to the size of the gap between the second pressing nut and the cable. The winding height of the sixth sealing filler 114 is slightly higher than the height of the second fastener 108 (i.e., the pressing nut) so as to protrude from the second fastener 108, and the winding outer diameter is smaller than the inner diameter of the second fastener 108, which will not hinder the second fastener 108 from entering the second sealing groove 1013, ensuring that the second fastener 108 can be smoothly inserted into the second sealing groove 1013 with its through-hole sleeved on the linear entity 300 during installation, and the sixth sealing filler 114 wound around the linear entity is filled into the through-hole gap to achieve sealing.

[0090] Optionally, before installing the first fastener 103, the method may further include: forming a seventh sealing filler 115 outside the linear entity 300 to fill the gap between the through-hole of the first fastener 103 and the linear entity 300 when installing the first fastener 103.

[0091] Optionally, between steps S101 and S103, it may further include: filling the gap between the annular protrusion 1011 and the linear entity 300 with the fifth sealing filler 113.

[0092] In some embodiments, the fifth sealing packing 113 is implemented as a sealant. Specifically, after the first sealing structure is installed, the sealant can be poured into the annular protrusion 1011 from one side of the second sealing groove 1013 to fill the gap between the annular protrusion 1011 and the linear entity 300. Preferably, the poured sealant can at least completely cover the bottom of the second sealing groove 1013 to reduce or eliminate the gap with the fourth pressing washer 119.

[0093] S103: Install the second sealing packing 107 and the second fastener 108 in the second sealing groove 1013 in sequence to form a second sealing structure.

[0094] In some embodiments, the fourth pressing washer 119, more than two second sealing packings 107, the fifth pressing washer 120 and the second fastener 108 can be installed in sequence from the annular protrusion 1011 at the bottom of the second sealing groove 1013 to the groove opening.

[0095] In an alternative embodiment, to avoid leaving gaps between the fourth pressing washer 119 and the annular protrusion 1011 and the groove wall of the second sealing groove 1013 when the fourth pressing washer 119 is installed, the fourth pressing washer 119 can be immersed in the sealant and then placed at the bottom of the second sealing groove 1013, and it is confirmed that it is in place and the sealant overflows from the gap to ensure that the gap is completely exhausted of air.

[0096] In an alternative embodiment, when any one of the second sealing packing 107, the fourth pressing washer 119 and the fifth pressing washer 120 is installed, sealant can be injected to fill the gap.

[0097] In an alternative embodiment, after the first fastener 103 is tightened in place (which can be determined according to the torque reaching a preset value), a certain amount of first thread allowance can be left outside the groove opening of the first sealing groove 1012.

[0098] S105: The third sealing packing 110 is used to tightly hold the second fastener 108 and the linear entity 300 and hermetically wrap the intersection of the outside of the second fastener 108 and the linear entity 300.

[0099] In some embodiments, the third sealing filler 110 includes a mixture of a fiber rope and a sealant. Optionally, the fiber rope is made of a mixed fiber of one or more materials such as carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene. In some embodiments, the second fastener 108 includes a connected cylindrical portion and an end portion, the cylindrical portion being coupled to the second sealing groove 1013 (such as by screw threading), and the radial length of the end portion being greater than that of the cylindrical portion. The fiber rope mixed with (such as impregnated with) the sealant can be first wound circumferentially around the cylindrical portion and extended towards the end portion, and then cross-wound around the end portion and the linear entity 300 to tightly hold the second fastener 108 and the linear entity 300 together for covering and sealing, thereby completing the arrangement of the third sealing filler 110.

[0100] S107: Enclose the third sealing structure and the external part of the pipe body 101 in the first sealing cavity by the first sealing mold 111, and pour the fourth sealing filler 112 into the first sealing cavity from the gap.

[0101] The first sealing mold 111 has a first sealing cavity. The first sealing mold 111 encloses the third sealing structure and the external part of the pipe body 101 in the first sealing cavity, and the fourth sealing filler 112 fills the gap in the first sealing cavity to form a seal between the third sealing structure, the pipe body 101, etc. and the external environment. Specifically, the first sealing mold 111 is fixedly installed on the pressure-resistant body 200 to form a gap to be sealed between the inner wall of the first sealing cavity and the pipe body 101, the third sealing structure, and the linear entity 300 passing through the third sealing structure. The fourth sealing filler 112 is exemplified as a sealant, and can be poured into the first sealing cavity from the gap of the first sealing mold 111 (such as the gap between the linear entity 300) to fill the gap, and after curing, a fourth sealing structure is formed.

[0102] As an example, when installing the first sealing mold 111, its sealing surface can be roughened and cleaned to enhance the sealing connection effect. After the first sealing mold 111 is fixed to the pressure-resistant body 200, according to the different vertical, horizontal or inverted states of the pipe body 101, a suitable gap can be selected to layer by layer pour the sealant into the first sealing cavity as the fourth sealing filler 112. During pouring, the first sealing mold 111 can be tapped and vibrated to make the sealant evenly distributed and discharge air bubbles until all the gaps in the sealed contact area in the first sealing mold 111 are filled with the sealant and visible air bubbles are eliminated.

[0103] Optionally, after installing the first fastener 103 in step S101, when constructing the nine sealing structures as Figure 7 shown, the method may further include:

[0104] i) The eighth sealing packing 116 tightly holds the first fastener 103 and the linear entity 300 together and is hermetically wrapped around the intersection of the outside of the first fastener 103 and the linear entity 300.

[0105] In some embodiments, the eighth sealing packing 116 includes a mixture of a fiber rope and a sealant. Optionally, the fiber rope is made of a mixed fiber material of one or more of carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene. In some embodiments, the first fastener 103 includes a connected cylindrical portion and an end portion. The cylindrical portion is coupled to the first sealing groove 1012 (such as by screw threading). The diameter of the end portion is greater than that of the cylindrical portion. The fiber rope mixed with (such as impregnated with) the sealant can be first wound circumferentially around the cylindrical portion and extended towards the end portion, and then cross-wound around the end portion and the linear entity 300 to tightly hold the first fastener 103 and the linear entity 300 together for covering and sealing, thereby completing the arrangement of the eighth sealing packing 116.

[0106] ii) The second sealing mold 117 covers the third sealing structure and the in-cabin portion of the pipe body 101 in the second sealing cavity, and the ninth sealing packing 118 is poured into the second sealing cavity from the gap.

[0107] The second sealing mold 117 has a second sealing cavity. The second sealing mold 117 covers the eighth sealing structure and the out-of-cabin portion of the pipe body 101 in the second sealing cavity. The ninth sealing packing 118 fills the gap in the second sealing cavity to form a seal between the second sealing structure, the pipe body 101, etc. and the out-of-cabin environment. Specifically, the second sealing mold 117 is fixedly installed on the pressure-resistant body 200 to form a gap to be sealed between the inner wall of the second sealing cavity and the pipe body 101, the second sealing structure, and the linear entity 300 passing through the eighth sealing structure. The ninth sealing packing 118 is exemplified as a sealant and can be poured into the first sealing cavity from the gap of the second sealing mold 117 (such as the gap between the linear entity 300) to fill the gap, and after curing, a fourth sealing structure is formed.

[0108] As an example, when installing the second sealing mold 117, its sealing surface can be roughened and cleaned to enhance the sealing connection effect. After the second sealing mold 117 is fixed to the pressure-resistant body 200, according to the different vertical, horizontal, or inverted positions of the pipe body 101, an appropriate gap can be selected to layer-by-layer inject the sealant into the second sealing cavity as the fourth sealing packing 112. During pouring, the second sealing mold 117 can be tapped and vibrated to make the sealant evenly distributed and discharge air bubbles until all the gaps in the sealed contact area in the second sealing mold 117 are filled with the sealant and visible air bubbles are eliminated.

[0109] In some alternative embodiments, to enhance the sealing effect, the sealing contact areas of the above components can be roughened in advance before installation. For example, the outer surface of the linear entity 300, the inner wall of the pipe body 101 (such as the entire inner wall without damaging the threads), the first fastener 103 (such as the entire surface), the second fastener 108 (such as the entire surface), etc. The sealing contact areas are roughened by roughening tools such as sandpaper and grinding wheels to avoid the existence of smooth surfaces.

[0110] In some alternative embodiments, to enhance the sealing effect, the sealing contact areas of the above components can be cleaned in advance before installation. For example, the sealing contact areas are cleaned with a cleaning agent, a cleaning cloth, etc. until there is no dirt; if cleaned with a cleaning agent, etc., it can also be dried by air drying or hot air drying later.

[0111] In the previous embodiments, it was mentioned that the first sealing packing 102 / second sealing packing 107 can be coated with a sealant as a lubricant when placed in the corresponding sealing grooves. It can be understood that in addition to the first sealing packing 102 and the second sealing packing 107, sealant can also be coated on each compression washer, fastener, etc. as a lubricant.

[0112] In the above embodiments, the through-hull sealing device 100 with, for example, a six-seal structure, a nine-seal structure, or multiple seals after reducing the optional seal structures, can be respectively applied to application scenarios such as manned and unmanned underwater vehicles and can well meet the through-hull sealing requirements of cables / pipes, etc., achieving a very reliable sealing effect, firmly fastening the cables / pipes and achieving a leak-proof sealing effect. As an example, the underwater vehicle is a manned underwater vehicle, and there are two or more first sealing packings 102 arranged along the axial direction; the first sealing packing 102 is implemented as an elastic material, and a compression washer is provided between adjacent first sealing packings 102; the first fastener 103 is exposed. Alternatively, if the underwater vehicle is an unmanned underwater vehicle, the through-hull sealing device includes an eighth sealing structure and a ninth sealing structure covering the outside of the first fastener 103.

[0113] In summary, the present invention relates to the field of sealing technology, and provides a through-hull sealing device and an installation method thereof applied to an underwater vehicle. The through-hull sealing device includes: a pipe body, and a pipe cavity partition divides the pipe cavity to form a first sealing groove and a second sealing groove; the first sealing structure includes a first sealing filler, which fills the gap between the pipe body and the linear entity in the first sealing groove; a first fastener compresses the first sealing filler; the second sealing structure includes a second sealing filler, which fills the gap between the pipe body and the linear entity in the second sealing groove; a second fastener compresses the second sealing filler; the third sealing structure includes a third sealing filler, which seals and wraps around the second fastener and the linear entity together and is coated outside the second fastener; the fourth sealing structure includes a first sealing mold, which covers the third sealing structure and the outer part of the pipe body of the cabin, and fills the fourth sealing filler. Multiple seals ensure that the linear entity does not move and the seal does not leak during the underwater navigation process, and the sealing effect is safe and reliable.

[0114] The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the protection scope of the present invention.

Claims

1. A tank penetration sealing device, characterized in that: include: The tube body is extended along an axial direction to form a tube cavity for passing the linear entity; wherein the inner wall of the tube cavity forms an annular convex portion to separate the tube cavity to form a first sealing groove and a second sealing groove; the first sealing groove and the second sealing groove are respectively placed inside and outside the cabin; The first sealing structure comprises: at least one first sealing filler, which fills the gap between the tube body and the linear entity in the first sealing groove; a first fastener, which enters the first sealing groove and is used to compress the first sealing filler and has a through hole for the linear entity to pass through; The second sealing structure comprises: at least one second sealing filler, which fills the gap between the tube body and the linear entity in the second sealing groove; a second fastener, which enters the second sealing groove and is used to compress the second sealing filler and has a through hole for the linear entity to pass through; The third sealing structure includes: a third sealing filler, which holds the second fastener and the linear entity tightly and seals and covers the intersection of the second fastener and the linear entity; The fourth sealing structure comprises: a first sealing mold having a first sealing cavity, which seals the third sealing structure and the outer cabin portion of the tube body in the first sealing cavity; and a fourth sealing filler, which fills the gap in the first sealing cavity; A fifth sealing structure comprises: a fifth sealing filler, which fills the gap between the annular convex portion and the linear entity; A sixth sealing structure, comprising: a sixth sealing filler, filling a gap between the through hole of the second fastener and the linear entity; A seventh sealing structure, comprising: a seventh sealing filler, filling a gap between the through hole of the first fastener and the linear entity; An eighth sealing structure comprises: an eighth sealing filler, which embraces the first fastener and the linear entity and seals and covers the intersection of the first fastener and the linear entity; The ninth sealing structure comprises: a second sealing cavity and a second sealing mold for passing a linear entity, which seals the eighth sealing structure and the inner part of the tube body in the second sealing cavity; and a ninth sealing filler, which fills the gap in the second sealing cavity.

2. The penetration sealing device according to claim 1, characterized in that: There are more than two first sealing fillers arranged along the axial direction; the first sealing fillers are implemented as elastic materials, and compression washers are provided between adjacent first sealing fillers; And / or, the first sealing filler is an annular structure with an inclined opening. When more than two first sealing fillers are provided, the inclined openings of adjacent first sealing fillers are staggered by a preset angle. The material of the first sealing filler is implemented as at least one of the following: chloroprene rubber, ethylene propylene rubber, nitrile rubber, polyurethane rubber, and a polymer composite material of any one of them.

3. The penetration sealing device according to claim 1, characterized in that: A compression washer is provided between the first sealing filler, the first fastener and the annular protrusion; and / or a compression washer is provided between the second sealing filler, the second fastener and the annular protrusion.

4. The penetration sealing device according to claim 3, characterized in that: The compression washer is implemented as any of the following: 1) The material of the compression washer is one of the following: copper, stainless steel, special engineering plastics; 2) The compression gasket is implemented as a stacked structure of multiple V-shaped sealing rings; the material of the V-shaped sealing ring is one of the following: nitrile rubber, chloroprene rubber, natural rubber, butyl rubber, chlororubber.

5. The penetration sealing device according to claim 1, characterized in that: When the eighth sealing structure and the ninth sealing structure exist, the second sealing filler is implemented as a mixture of 3D fiber braided fabric and sealant.

6. The penetration sealing device according to claim 1, characterized in that: The cabin penetration sealing device is also implemented as at least one of the following structures: 1) There are two or more of the second sealing fillers arranged along the axial direction; 2) The second sealing filler is implemented as a mixture of 3D fiber braid and sealant; 3) The sealing filler in the gap between the through hole of the first fastener and / or the second fastener and the linear entity is formed by a fiber rope mixed with sealant and axially wound around the outer wall of the linear entity; the fiber rope is made of a mixed fiber of one or more materials selected from carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene; 4) The third sealing filler covering the second fastener is formed by fiber ropes mixed with sealant that are alternately wound around the second fastener and the outer wall of the linear entity from opposite sides; and / or the eighth sealing filler covering the intersection of the first fastener and the linear entity is formed by fiber ropes mixed with sealant that are crossed and wound around the first fastener and the outer wall of the linear entity; 5) The first sealing filler and / or the second sealing filler is implemented as an annular structure with an inclined opening which is sleeved outside the linear entity; the inclined openings of adjacent first sealing fillers are staggered by a preset angle, and / or the inclined openings of adjacent second sealing fillers are staggered by a preset angle; 6) The first fastener and the second fastener are threadedly engaged with the notches of the first sealing groove and the second sealing groove respectively; 7) The first sealing mold is a cylindrical body converging toward the outer end; 8) The first sealing mold is a cylindrical body with a tapered outer end; 9) The second sealing packing has a vacuum package with a built-in desiccant indicating the moisture level.

7. A method for installing a penetration sealing device in an underwater vehicle, characterized in that: Applied to the installation of the penetration sealing device according to any one of claims 1 to 6 on an underwater vehicle, the method comprising: S101: The tube body is fixed to the underwater vehicle cabin and a linear entity is passed through the tube cavity, and the first sealing filler and the first fastener are sequentially installed in the first sealing groove to form a first sealing structure; S103: installing the second sealing filler and the second fastener in the second sealing groove in sequence to form a second sealing structure; S105: Using a third sealing filler to hold the second fastener and the linear entity together and seal and cover the intersection of the second fastener and the linear entity; S107: The third sealing structure and the outer portion of the tube body are sealed in the first sealing cavity by a first sealing mold, and a fourth sealing filler is poured into the first sealing cavity from the gap.

8. The installation method of the penetration sealing device according to claim 7 in an underwater vehicle is characterized in that: The underwater vehicle is a manned underwater vehicle, and the first sealing fillers have more than two arranged along the axial direction; The first sealing filler is implemented as an elastic material, and a compression gasket is provided between adjacent first sealing fillers; the first fastener is exposed; or, the underwater vehicle is an unmanned underwater vehicle, and the cabin penetration sealing device includes an eighth sealing structure and a ninth sealing structure covering the outside of the first fastener.

9. The installation method of the penetration sealing device according to claim 7 in an underwater vehicle is characterized in that: Also includes at least one of the following: 1) Before S103, the method further includes: filling the gap between the annular convex portion and the linear entity with a fifth sealing filler; 2) before installing the second fastener, forming a sixth sealing filler which is sleeved outside the linear entity and has a thickness suitable for the gap between the through hole of the second fastener and the linear entity, so as to fill the gap between the through hole of the second fastener and the linear entity when installing the second fastener; 3) before installing the first fastener, forming a seventh sealing filler sleeved outside the linear entity to fill the gap between the through hole of the first fastener and the linear entity when installing the first fastener; 4) After the first fastener is installed, the first fastener and the linear entity are tightly embraced by an eighth sealing filler to seal and cover the intersection of the first fastener and the linear entity; The third sealing structure and the inner cabin part of the tube body are sealed in the second sealing cavity of the second sealing cavity by a second sealing mold, and a ninth sealing filler is poured into the second sealing cavity from the gap; 5) Install a compression washer before and after installing each first sealing filler; and / or install a compression washer before and after installing the second sealing filler; 6) When installing the first sealing filler and / or the second sealing filler, apply sealant as a lubricant; 7) When using sealant to fill gaps, determine the gaps where the sealant overflows.

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