Sealing device and optical cable assembly

Abstract

The utility model belongs to the technical field of submarine optical cables, and provides a sealing device and an optical cable assembly. The sealing device is used for sealing the connecting part of the ultralight submarine optical cable and comprises a sealing device body, an injection molding sleeve and an adhesive film, a first through hole extending in the axial direction is formed in the sealing device body, the sealing device body comprises a first end and a second end which are opposite to each other, and the first through hole is used for inserting an ultra-light submarine optical cable and the ultra-light submarine optical cable extends out of the second end; one part of the injection molding sleeve wraps the sealing device body, and the other part of the injection molding sleeve extends from the second end and is used for wrapping the ultra-light submarine optical cable; the base material of the injection molding sleeve is the same as the base material of the outer wall of the ultra-light submarine optical cable, and the glue film is used for bonding the injection molding sleeve and the ultra-light submarine optical cable. The sealing device provided by the utility model enables the ultralight submarine optical cable to have good sealing performance at the joint.

Description

Technical Field

[0001] The present application relates to the technical field of submarine optical cables, and in particular to a sealing device and an optical cable assembly. Background Art

[0002] Ultra-light submarine optical cables have the advantages of low cost, light weight, and easy laying, and can be used in scenarios that require quick laying.

[0003] Specifically, the ultra-light submarine optical cable omits the outermost metal armor layer to reduce weight and cost. However, at the connection point of the ultra-light submarine optical cable, for example, when two sections of ultra-light submarine optical cables need to be connected or when the ultra-light submarine optical cable needs to be connected to other submarine communication devices, the sealing at the connection is poor. In the related art, heat shrink tubing is used for sealing. The heat shrink tubing itself has low strength and poor adhesion to the material at the connection point of the heat shrink tubing, resulting in poor sealing when the heat shrink tubing is used for sealing. The outermost side of the ultra-light submarine optical cable is not provided with a metal armor layer. Therefore, it is not suitable for sealing by mechanical sealing method using a sealing ring and a flange.

[0004] Therefore, in the related art, the sealing performance of the ultra-light submarine optical cable at the connection is poor. Utility Model Content

[0005] The embodiments of the present application provide a sealing device and an optical cable assembly, wherein the sealing device enables an ultra-light submarine optical cable to have better sealing performance at the connection.

[0006] An embodiment of the present application provides a sealing device, which is used for sealing a connection of an ultralight submarine optical cable. The sealing device comprises a sealing device body, an injection molding sleeve and an adhesive film. The sealing device body comprises a first through hole extending in an axial direction, and the sealing device body comprises a first end and a second end opposite to each other. The first through hole is used for inserting the ultralight submarine optical cable, and the ultralight submarine optical cable extends from the second end. A portion of the injection molding sleeve is wrapped around the sealing device body, and a portion of the injection molding sleeve extends from the second end and is used for wrapping around the ultralight submarine optical cable. The base material of the injection molding sleeve is the same as the base material of the outer wall of the ultralight submarine optical cable, and the adhesive film is used for bonding the injection molding sleeve to the ultralight submarine optical cable.

[0007] In a possible implementation, the sealing device provided in the embodiment of the present application has a multi-layer adhesive film, the multi-layer adhesive film is stacked and the multi-layer adhesive film is staggered layer by layer along the axial direction.

[0008] In a possible implementation, in the sealing device provided in the embodiment of the present application, the cross-section of the injection molded sleeve along the axial direction is a first cone, the first large end of the injection molded sleeve faces the sealing device body, and the first small end of the injection molded sleeve is used to face the ultra-light submarine optical cable.

[0009] In a possible implementation, in the sealing device provided in an embodiment of the present application, a fastening glue is provided in the first through hole, and the fastening glue is used to adhere the ultra-light submarine optical cable to the inner wall of the first through hole; the cross-section of the first through hole along the axial direction is a second cone, the second large end of the first through hole faces the first end, and the second small end of the first through hole faces the second end, so as to prevent the ultra-light submarine optical cable from falling out of the second end.

[0010] In a possible implementation, the sealing device provided in the embodiment of the present application has a recessed portion on the inner wall of the first through hole, and a raised portion on the side of the fastening glue facing the first through hole, wherein the raised portion is arranged opposite to the recessed portion and inserted into the recessed portion.

[0011] In a possible implementation, the sealing device provided in the embodiment of the present application has a first tooth portion on the injection molding sleeve, and a second tooth portion on the sealing device body, and the first tooth portion is engaged with the second tooth portion.

[0012] In a possible implementation manner, the sealing device provided in the embodiment of the present application further includes a clamping member, which is disposed close to the adhesive film and is used to clamp on the ultra-light submarine optical cable.

[0013] In a possible implementation, the sealing device provided in the embodiment of the present application further includes a protective resin and a resin potting cavity, the resin potting cavity is used to accommodate the sealing device body, the injection molding sleeve and the adhesive film, and the protective resin is filled in the resin potting cavity.

[0014] In a possible implementation, in the sealing device provided in the embodiment of the present application, the sealing device body further includes a first mounting portion, the first mounting portion is located at one side of the first end, and a sealing ring is provided on the first mounting portion.

[0015] An embodiment of the present application further provides an optical cable assembly, comprising an ultralight submarine optical cable and the above-mentioned sealing device, wherein the sealing device is arranged at the end of the ultralight submarine optical cable.

[0016] The sealing device and optical cable assembly provided in the embodiment of the present application, the sealing device is provided with a sealing device body, an injection molding sleeve and an adhesive film; the sealing device body has a first through hole, the sealing device body includes a first end and a second end opposite to each other, the first through hole is used to insert an ultralight submarine optical cable and the ultralight submarine optical cable extends from the second end; the sealing device body is used to support the injection molding sleeve, the adhesive film and the ultralight submarine optical cable located in the sealing device, thereby preventing the injection molding sleeve or the adhesive film from being deformed by external force and affecting the sealing performance. A part of the injection molding sleeve is wrapped on the sealing device body, and a part of the injection molding sleeve extends from the second end and is used to wrap on the ultralight submarine optical cable. A layer of material of the same material as the PE sheath of the ultralight submarine optical cable can be formed on the outer wall of the sealing device body, so as to facilitate the adhesive film to bond the injection molding sleeve and the ultralight submarine optical cable. The adhesive film is used to bond the injection molding sleeve and the ultralight submarine optical cable, and the base material of the injection molding sleeve is the same as the base material of the outer wall of the ultralight submarine optical cable. Therefore, the adhesive film only needs to have good adhesion to the PE material. Thus, the sealing device has better sealing performance by providing better mechanical support and better adhesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the structure of an ultra-light submarine optical cable;

[0019] Figure 2 This is a cross-sectional view of an ultra-light submarine optical cable;

[0020] Figure 3 Schematic diagram of the structure of the sealing device provided in the embodiment of the present application Figure 1 ;

[0021] Figure 4 The use state of the sealing device provided in the embodiment of the present application Figure 1 ;

[0022] Figure 5 A schematic diagram of the structure of a sealing device body in a sealing device provided in an embodiment of the present application;

[0023] Figure 6 A diagram showing the state of the sealing device body and the injection molding sleeve in the sealing device provided in an embodiment of the present application;

[0024] Figure 7 A diagram showing the use status of the adhesive film in the sealing device provided in an embodiment of the present application;

[0025] Figure 8 Schematic diagram of the structure of the sealing device provided in the embodiment of the present application Figure 2 ;

[0026] Fig. 9 The use state of the sealing device provided in the embodiment of the present application Figure 2 ;

[0027] Fig.10 A schematic diagram of the structure of a clamping member in a sealing device provided in an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 10-ultra-light submarine optical cable; 10a-connection end; 11-optical fiber; 12-optical fiber protection tube; 13-armored steel wire; 14-armored tape; 15-PE sheath;

[0030] 100-sealing device;

[0031] 110 - sealing device body; 110a - first end; 110b - second end;

[0032] 111-first through hole; 111a-second large end; 111b-second small end; 1111-fastening glue; 1112-recessed portion; 112-second tooth portion; 113-first mounting portion; 1131-sealing ring;

[0033] 120-injection molding sleeve; 120a-first large end; 120b-first small end;

[0034] 121- second through hole;

[0035] 122- first tooth portion;

[0036] 130-adhesive film; 131-first adhesive film; 132-second adhesive film; 133-third adhesive film;

[0037] 140-clamping member; 141-clamping sheet; 142-first fastening member;

[0038] 150-protective resin;

[0039] 160-resin potting cavity; 161-glue potting hole; 162-exhaust hole;

[0040] 170 - second fastener;

[0041] L-axial;

[0042] R - Radial. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] The terms "first", "second", "third" (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0047] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or service tool that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or service tool.

[0048] Ultra-light submarine optical cables have the advantages of low cost, light weight, and easy laying, and can be used in scenarios that require rapid laying.

[0049] Figure 1 This is a schematic diagram of the structure of an ultra-light submarine optical cable; Figure 2 A cross-sectional view of an ultralight submarine optical cable.

[0050] See also Figure 1 and Figure 2 As shown, the ultra-light submarine optical cable 10 includes an optical fiber 11, an optical fiber protection tube 12, an armored steel wire 13, an armored tape 14 and a PE (polyethylene) sheath 15 which are arranged in sequence from the inside to the outside.

[0051] In order to facilitate the laying, the ultralight submarine optical cable 10 needs to be light in weight and low in cost. Therefore, the ultralight submarine optical cable 10 omits the outermost metal armor layer to reduce weight and cost. However, at the connection of the ultralight submarine optical cable 10, for example, when two sections of the ultralight submarine optical cable 10 need to be connected or when the ultralight submarine optical cable 10 needs to be connected to other submarine communication devices, the sealing performance at the connection is poor. Among them, the end of the ultralight submarine optical cable 10 used for connection is the connection end 10a.

[0052] In the related art 1, a heat shrink tubing can be used for sealing, but there is a problem of poor sealing of the box when the heat shrink tubing is used for sealing.

[0053] For example, the inner wall of the heat shrink tube is coated with EVA (Ethylene-Vinyl Acetate) hot melt adhesive. The ports of other submarine communication devices are generally made of metal. The adhesion between EVA hot melt adhesive and PE sheath 1.4 is poor, and the adhesion between EVA hot melt adhesive and metal is poor. In addition, the hydrolysis resistance of EVA hot melt adhesive is poor, and it is difficult to meet the sealing requirements during long-term use. EAA (Ethylene-Acrylic Acid, ethylene acrylic acid copolymer) hot melt adhesive or EMAA (Ethylene-Methacrylic Acid, ethylene-methacrylic acid) hot melt adhesive has good adhesion to PE sheath 1.4 and metal, but the melting points of EAA hot melt adhesive and EMAA hot melt adhesive are high, and it is difficult to apply them to the inner wall of the heat shrink tube.

[0054] For another example, when the ultralight submarine optical cable 10 is subjected to axial tension, the heat shrink tubing, due to its own low strength, will be subjected to force as the ultralight submarine optical cable extends along the axial direction in the absence of other protective devices, causing a slight movement between the hot melt adhesive on the inner wall of the heat shrink tubing and the PE sheath 15 of the ultralight submarine optical cable 10, resulting in debonding, resulting in poor sealing.

[0055] For another example, the heat shrink tubing is wrapped around the PE sheath 1.5 using a heat gun. When the wrapped area is large, it is difficult for the heat gun to completely fit the heat shrink tubing onto the PE sheath 1.5 and the metal surface of the port. Bubbles remain between the heat shrink tubing, the PE sheath 1.5 and the metal surface. These bubbles penetrate the hot melt adhesive bonding interface inside the heat shrink tubing under water pressure to form a through water channel, which also makes the sealing poor.

[0056] However, the outermost side of the ultralight submarine optical cable is not provided with a metal armor layer. If the ultralight submarine optical cable 10 is sealed by a mechanical sealing method of a sealing ring and a flange, the PE sheath 1.5 of the ultralight submarine optical cable 10 is easily damaged, resulting in poor sealing. In addition, the gaps between the armored steel wires 13 cause the PE sheath 15 to lose roundness, which also reduces the sealing.

[0057] Therefore, in the related art, the sealing performance of the ultra-light submarine optical cable at the connection is poor.

[0058] Based on this, the present application provides a sealing device and an optical cable assembly, wherein the sealing device enables the ultra-light submarine optical cable to have better sealing performance at the connection.

[0059] Figure 3 Schematic diagram of the structure of the sealing device provided in the embodiment of the present application Figure 1 ; Figure 4 The use state of the sealing device provided in the embodiment of the present application Figure 1 .

[0060] See also Figure 3 and Figure 4 As shown, the sealing device 100 provided in the embodiment of the present application is used for sealing the connection of the ultralight submarine optical cable 10, and includes a sealing device body 110, an injection molding sleeve 120 and an adhesive film 130; the sealing device body 110 has a first through hole 111 extending along the axial direction L, and the sealing device body 110 includes a first end 110a and a second end 110b opposite to each other, and the first through hole 111 is used to insert the ultralight submarine optical cable 10 and the ultralight submarine optical cable 10 extends from the second end 110b; a part of the injection molding sleeve 120 is wrapped on the sealing device body 110, and a part of the injection molding sleeve 120 extends from the second end 110b and is used to be wrapped on the ultralight submarine optical cable 10; the base material of the injection molding sleeve 120 is the same as the base material of the outer wall of the ultralight submarine optical cable 10, and the adhesive film 130 is used to bond the injection molding sleeve 120 to the ultralight submarine optical cable 10.

[0061] Specifically, Figure 5 This is a schematic structural diagram of the sealing device body in the sealing device provided in an embodiment of the present application.

[0062] See also Figures 3 to 5As shown, the sealing device body 110 is used to support the injection molding sleeve 120, the adhesive film 130 and the ultralight submarine optical cable 10 located in the sealing device 100, thereby preventing the injection molding sleeve 120 or the adhesive film 130 from being deformed by external force and affecting the sealing performance. The sealing device body 110 can be made of a metal material resistant to seawater corrosion, for example, the sealing device body 110 can be made of stainless steel, and the stainless steel can be selected to be 316L or stainless steel with a corrosion resistance higher than 316L. The axial direction L of the sealing device body 110 is the axial direction of the ultralight submarine optical cable 10, and the direction perpendicular to the axial direction L is the radial direction R. The first through hole 111 in the sealing device body 110 penetrates the sealing device body 110 along the axial direction L, and the inner wall profile of the first through hole 111 matches the outer wall profile of the ultralight submarine optical cable 10. The sealing device body 110 includes a first end 110a and a second end 110b opposite to each other along the axial direction L.

[0063] Figure 6 A diagram showing the state of cooperation between the injection molding sleeve and the sealing device body in the sealing device provided in an embodiment of the present application.

[0064] The injection sleeve 120 can be injection molded on the sealing device body 110 by an injection molding machine and an injection mold. Specifically, the base material of the injection sleeve 120 is PE, and the injection molding machine heats and melts the PE injection molding particles and injects them onto the sealing device body 110. After the PE injection molding particles are condensed and the volume shrinks, the injection sleeve 120 has a centripetal force, so that the injection sleeve 120 can be reliably fixed on the sealing device body 110, and the injection sleeve 120 and the sealing device body 110 have good sealing performance.

[0065] The injection sleeve 120 only covers a part of the sealing device body 110, and another part of the injection sleeve 120 extends from the second end 110b. It should be noted that the injection sleeve 120 also has a second through hole 121, which is aligned with the first through hole 111, and the size of the second through hole 121 is consistent with the size of the first through hole 111. It should be noted that when the sealing device 100 is used to seal the connection of the ultralight submarine optical cable 10, the injection sleeve 120 can be pre-injected on the sealing device body 110 to form a semi-finished product to improve the efficiency of the ultralight submarine optical cable 10 when connecting.

[0066] By injection molding the injection sleeve 120 on the sealing device body 110 , a layer of material that is the same as the PE sheath 1.4 of the ultralight submarine optical cable 10 can be formed on the outer wall of the sealing device body 110 , so that the adhesive film 130 can bond the injection sleeve 120 and the ultralight submarine optical cable 10 .

[0067] The material of the adhesive film 130 can be a material that is easy to bond with the PE sheath 15 and the injection molding sleeve 120. In the embodiment of the present application, the adhesive film 130 can be an adhesive layer made by adding EAA to a POE (polymer of ethylene and butene or polymer of ethylene and octene) substrate. The POE substrate itself has good toughness. By adding EAA to the POE substrate, the POE can be functionally modified, so that the adhesive film 130 has good adhesiveness while retaining good toughness, so that when the adhesive film 130 is used to bond the injection molding sleeve 120 and the sheath 15 of the ultra-light submarine optical cable 10, it is easy to operate and the bonding is reliable.

[0068] The process of sealing the ultra-light submarine optical cable 10 using the sealing device 100 is described below.

[0069] Specifically, the PE sheath 15 and the armor tape 14 on the connection end 10a of the ultralight submarine optical cable 10 are stripped off; the armor steel wires 13 are evenly spread out, the asphalt on the surface of the armor steel wires 13 is removed, and part of the armor steel wires 13 are cut off. It should be noted that the length of the PE sheath 15 and the armor tape 14 removed is set according to actual needs, and usually 40mm-60mm can be removed.

[0070] The connecting end 10a is inserted into the second through hole 121 of the injection sleeve 120 and the first through hole 111 of the sealing device body 110 from the second end 110b, and a portion of the injection sleeve 120 is wrapped around the PE sheath 15 of the ultra-light submarine optical cable 10 .

[0071] A portion of the adhesive film 130 is wrapped on the PE sheath 15 of the ultralight submarine optical cable 10, and a portion of the adhesive film 130 is wrapped on the injection molding sleeve 120, and then the adhesive film 130 is heated using a heat drying gun, so that the adhesive film 130 is bonded to the injection molding sleeve 120 and the PE sheath of the ultralight submarine optical cable 10. The material of the injection molding sleeve 120 is the same as that of the PE sheath 15 of the ultralight submarine optical cable 10, so the adhesive film 130 only needs to have good adhesion to the PE material.

[0072] The sealing device 100 provided in the embodiment of the present application is provided with a sealing device body 110, an injection molding sleeve 120 and an adhesive film 130; the sealing device body 110 has a first through hole 111, and the sealing device body 110 includes a first end 110a and a second end 110b opposite to each other, and the first through hole 111 is used to insert the ultralight submarine optical cable 10 and the ultralight submarine optical cable 10 extends from the second end 110b; the sealing device body 110 is used to support the injection molding sleeve 120, the adhesive film 130 and the ultralight submarine optical cable 10 located in the sealing device 100, thereby preventing the injection molding sleeve 120 or the adhesive film 130 from being deformed by external force and affecting the sealing performance. A portion of the injection molding sleeve 120 is wrapped around the sealing device body 110, and a portion of the injection molding sleeve 120 extends from the second end 110b and is used to wrap around the ultralight submarine optical cable 10. A layer of material that is the same as the PE jacket 1.4 of the ultralight submarine optical cable 10 can be formed on the outer wall of the sealing device body 110, so that the adhesive film 130 can bond the injection molding sleeve 120 and the ultralight submarine optical cable 10. The adhesive film 130 is used to bond the injection molding sleeve 120 and the ultralight submarine optical cable 10. The base material of the injection molding sleeve 120 is the same as the base material of the outer wall of the ultralight submarine optical cable 10. Therefore, the adhesive film 130 only needs to have good adhesion to the PE material. Therefore, the sealing device 100 has better sealing performance by providing better mechanical support and better adhesion.

[0073] Figure 7 A diagram showing the usage status of the adhesive film in the sealing device provided in an embodiment of the present application.

[0074] join Figure 7 As shown, the adhesive film 130 is multi-layered, the multi-layer adhesive film 130 is stacked and the multi-layer adhesive film 130 is staggered layer by layer along the axial direction.

[0075] exist Figure 7 In the illustrated embodiment, three layers of adhesive films 130 are provided, namely, a first adhesive film 131, a second adhesive film 132 and a third adhesive film 133. The first adhesive film 131 is wrapped on the injection molding sleeve 120, the second adhesive film 132 is partially wrapped on the first adhesive film 131 and partially wrapped on the PE jacket 15 of the ultralight submarine optical cable 10, and the third adhesive film 133 is partially included on the second adhesive film 132 and partially wrapped on the PE jacket 15 of the ultralight submarine optical cable 10. The first adhesive film 131, the second adhesive film 132 and the third adhesive film 133 are wound layer by layer on the PE jacket 15 of the ultralight submarine optical cable 10 and the injection molding sleeve 120, thereby further improving the sealing performance.

[0076] Please continue to see Figure 3 , Figure 4 and Figure 6As shown, the cross section of the injection sleeve 120 along the axial direction L is a first cone, the first large end 120 a of the injection sleeve 120 faces the sealing device body 110 , and the first small end 120 b of the injection sleeve 120 faces the ultra-light submarine optical cable 10 .

[0077] The dimension of the sealing device body 110 along the radial direction R is larger than the dimension of the ultralight submarine optical cable 10 along the radial direction R. The cross section of the injection sleeve 120 along the axial direction L is set to be tapered, and the first large end 120a of the injection sleeve 120 is oriented toward the sealing device body 110, and the first small end 120b of the injection sleeve 120 is oriented toward the ultralight submarine optical cable 10, so that the sealing device body 110 and the ultralight submarine optical cable 10 can be smoothly transitioned to facilitate wrapping and bonding of the adhesive film 130. It should be noted that when heating the adhesive film 130, the heat drying gun needs to be gradually moved from one end of the ultralight submarine optical cable 10 toward one end of the injection sleeve 120, so as to discharge the gas in the adhesive film 130.

[0078] Figure 8 Schematic diagram of the structure of the sealing device provided in the embodiment of the present application Figure 2 ; Fig. 9 The use state of the sealing device provided in the embodiment of the present application Figure 2 .

[0079] See also Figure 8 and Fig. 9 As shown, a fastening glue 1111 is provided in the first through hole 111, and the fastening glue 1111 is used to adhere the ultralight submarine optical cable 10 to the inner wall of the first through hole 111; the cross-section of the first through hole 111 along the axial direction L is a second cone, the second large end 111a of the first through hole 111 faces the first end 110a, and the second small end 111b of the first through hole 111 faces the second end 110b, so as to prevent the ultralight submarine optical cable from falling out from the second end.

[0080] A fastening glue 1111 is injected into the first through hole 111 from one side of the first end 110 a , and after the fastening glue 1111 is cured, the armor steel wire 13 can be bonded to the inner wall of the first through hole 111 .

[0081] The cross section of the first through hole 111 along the axial direction L is set to be conical, and the second large end 111a of the first through hole 111 faces the first end 110a, and the second small end 111b of the first through hole 111 faces the second end 110b, thereby preventing the fastening glue 1111 from escaping from the second small end 111b.

[0082] Please continue to see Figure 5 and Figure 6As shown, a recessed portion 1112 is provided on the inner wall of the first through hole 111 , and a convex portion (not shown) is provided on the side of the fastening adhesive 1111 facing the first through hole 111 . The convex portion is arranged opposite to the recessed portion 1112 and inserted into the recessed portion 1112 .

[0083] Specifically, a plurality of recessed portions 1112 are provided on the inner wall of the first through hole 111. When the fastening glue 1111 is injected into the first through hole 111, the uncured fastening glue 1111 flows into the recessed portions 1112. After the fastening glue 1111 is cured, a convex portion matching the recessed portions 1112 is formed. Thus, the fastening glue 1111 can be prevented from moving along the axial direction L in the first through hole 111 and rotating around the axial direction L.

[0084] Please continue to see Figure 5 and Figure 6 As shown, the injection sleeve 120 has a first tooth portion 122 , and the sealing device body 110 has a second tooth portion 112 , and the first tooth portion 122 is engaged with the second tooth portion 112 .

[0085] Specifically, the second tooth portion 112 is provided on the outer wall of the sealing device body 110, and when the injection molding sleeve 120 is injection-molded onto the sealing device body 110, part of the injection molding particles are injected into the gaps between the second tooth portions 112 by heating and melting to form the first tooth portion 122. The first tooth portion 122 and the second tooth portion 112 are engaged with each other, so that the bonding force between the sealing device body 110 and the injection molding sleeve 120 can be increased.

[0086] Fig.10 A schematic diagram of the structure of a clamping member in a sealing device provided in an embodiment of the present application.

[0087] Please continue to see Figures 8 to 10 As shown, the sealing device 100 further includes a clamping member 140 . The clamping member 140 is disposed close to the adhesive film 130 and is used to clamp on the ultra-light submarine optical cable 10 .

[0088] The clamping member 140 includes two clamping pieces 141 and a first fastener 142 . The two clamping pieces are arranged on both sides of the ultralight submarine optical cable 10 along the radial direction R to clamp the ultralight submarine optical cable 10 . The first fastener 142 is passed through the clamping piece 141 to fix the clamping piece 141 .

[0089] The clamping member 140 is disposed close to the adhesive film 130 and can fix the ultralight submarine optical cable 10 at the position where the ultralight submarine optical cable 10 extends out of the injection molding sleeve 120 , so as to provide better protection for the ultralight submarine optical cable 10 .

[0090] Please continue to see Figure 8 and Fig. 9As shown, the sealing device 100 further includes a protective resin 150 and a resin potting cavity 160 . The resin potting cavity 160 is used to accommodate the sealing device body 110 , the injection molding sleeve 120 and the adhesive film 130 . The protective resin 150 is filled in the resin potting cavity 160 .

[0091] Specifically, the sealing device body 110 has a first mounting hole, the resin potting cavity 160 has a second mounting hole, and the sealing device 100 also includes a second fastener 170, which is inserted into the second mounting hole and the first mounting hole to connect the resin potting cavity 160 with the sealing device body 110.

[0092] The protective resin 150 may be epoxy resin, and the resin potting cavity 160 has a potting hole 161. The protective resin 150 is poured into the resin potting cavity 160 from the potting hole 161. The cured protective resin 150 can protect the sealing device body 110, the injection sleeve 120 and the adhesive film 130. The resin potting cavity 160 is also provided with an exhaust hole 162, which is used to exhaust gas during the potting process.

[0093] Please continue to see Figure 3 , Figure 8 and Fig. 9 As shown, the sealing device body 110 further includes a first mounting portion 113 , which is located at one side of the first end 110 a , and a sealing ring 1131 is disposed on the first mounting portion 113 .

[0094] The first mounting portion 113 is used to connect the sealing device 100 to the port of other submarine communication devices. The first mounting portion 113 has a sealing ring 1131, so that the sealing device 100 also has good sealing performance on the first end 110a side.

[0095] The embodiment of the present application further provides an optical cable assembly, including an ultralight submarine optical cable 10 and a sealing device 100 provided in the above embodiment, wherein the sealing device 100 is disposed at a connecting end 10 a of the ultralight submarine optical cable 10 .

[0096] The structure of the sealing device 100 has been described in detail in the above embodiments, and will not be described again here.

[0097] The sealing device 100 is disposed at the connection end 10a of the ultra-light submarine optical cable 10 to facilitate the connection between optical cable components or to connect the optical cable components to ports of other submarine communication devices.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sealing device, which is used for sealing the connection of ultra-light submarine optical cables, characterized in that: It includes a sealing device body, an injection molding sleeve and a film; The sealing device body has a first through hole extending in the axial direction, and the sealing device body includes a first end and a second end opposite to each other, the first through hole is used to insert the ultralight submarine optical cable, and the ultralight submarine optical cable extends from the second end; A portion of the injection-molded sleeve is wrapped around the sealing device body, and a portion of the injection-molded sleeve extends from the second end and is used to be wrapped around the ultralight submarine optical cable; The base material of the injection molding sleeve is the same as the base material of the outer wall of the ultralight submarine optical cable, and the adhesive film is used to bond the injection molding sleeve and the ultralight submarine optical cable.

2. The sealing device according to claim 1, characterized in that: The adhesive film is multi-layered, and the multi-layer adhesive film is stacked and staggered layer by layer along the axial direction.

3. The sealing device according to claim 2, characterized in that: The cross section of the injection molding sleeve along the axial direction is a first cone, the first large end of the injection molding sleeve faces the sealing device body, and the first small end of the injection molding sleeve is used to face the ultra-light submarine optical cable.

4. The sealing device according to claim 3, characterized in that: A fastening glue is provided in the first through hole, and the fastening glue is used to bond the ultra-light submarine optical cable to the inner wall of the first through hole; The cross section of the first through hole along the axial direction is a second cone, the second large end of the first through hole faces the first end, and the second small end of the first through hole faces the second end, so as to prevent the ultra-light submarine optical cable from falling out of the second end.

5. The sealing device according to claim 4, characterized in that: The inner wall of the first through hole is provided with a concave portion, and the fastening adhesive has a convex portion on a surface facing the first through hole, wherein the convex portion is arranged opposite to the concave portion and inserted into the concave portion.

6. The sealing device according to any one of claims 1 to 4, characterized in that: The injection sleeve is provided with a first tooth portion, and the sealing device body is provided with a second tooth portion, and the first tooth portion is engaged with the second tooth portion.

7. The sealing device according to any one of claims 1 to 4, characterized in that: It also includes a clamping member, which is arranged close to the adhesive film and is used to clamp on the ultra-light submarine optical cable.

8. The sealing device according to any one of claims 1 to 4, characterized in that: It also includes a protective resin and a resin potting cavity, wherein the resin potting cavity is used to accommodate the sealing device body, the injection molding sleeve and the adhesive film, and the protective resin is filled in the resin potting cavity.

9. The sealing device according to any one of claims 1 to 4, characterized in that: The sealing device body further comprises a first mounting portion, the first mounting portion is located at one side of the first end, and a sealing ring is arranged on the first mounting portion.

10. An optical cable assembly, characterized in that: The invention comprises an ultralight submarine optical cable and a sealing device according to any one of claims 1 to 9, wherein the sealing device is arranged at the end of the ultralight submarine optical cable.

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