Cable sealing device

Abstract

The present invention relates to the technical field of underwater cable sealing, and provides a cable sealing connection device, comprising a cable, a crimping tube, and a housing; the cable is passed through the crimping tube, and a hot melt adhesive layer is provided on the inner wall of the crimping tube; the housing is provided with a first hole section, and the crimping tube is passed through the first hole section, forming a sealed cavity between the housing and the crimping tube, one end of the housing is sealed with the cable, and the other end of the housing is suitable for sealing with a target device. The cable sealing connection device proposed by the present invention is provided with a crimping tube on the outside of the cable, which effectively avoids the risk of over-compression of the cable, and the equivalent cross-sectional area of ​​the cured hot melt adhesive layer inside the crimping tube is small. Even in the case of great water depth, the actual axial pressure of the hot melt adhesive layer by the external water pressure is small, and the implementation feasibility and reliability are high.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater cable sealing, in particular to a cable sealing connection device. Background Art

[0002] With the gradual development of deep-sea floating wind turbines and deep-sea laboratories, submarine (electrical) cables are gradually being used in deep water environments. Since submarine cables need to enter underwater equipment through terminal entry, or submarine cables need to be repaired and connected at sea during use, the optical and electrical unit cores of submarine cables are required to have deep-water water-blocking and sealing functions.

[0003] Taking the entry of submarine cables into cabins as an example, for example, large-section high-voltage submarine cables, the outer sheath material of the optical and electrical unit cable cores in the submarine cables is generally polyethylene, and the surface energy of polyethylene is very low, and it cannot be bonded with mainstream vulcanized rubber by vulcanization. Only a very few glues such as acrylate can bond with it; for the optical and electrical unit cable cores of submarine cables with polyethylene as the outer sheath, the main watertight sealing method still relies on mechanical sealing based on rubber seals and on-site injection molding sealing based on the polyethylene outer sheath material of the optical and electrical unit cable cores in the submarine cables.

[0004] Among them, the mechanical sealing form based on rubber seals and the sealing form based on on-site injection molding of polyethylene materials have the following defects:

[0005] First, the mechanical seal is based on rubber seals. The gap between the rubber seal and the core of the optical and electrical units of the submarine cable is filled by squeezing the rubber seal ring. The rubber seal can be a conical ring. The conductor temperature of the submarine cable can reach above 90°C during operation. The insulation layer and outer sheath layer in the core of the submarine cable's electrical unit are generally made of (cross-linked) polyethylene. Its mechanical reinforcement weakens rapidly after heating, and its mechanical strength is relatively soft. Under the high pressure caused by the deformation of the rubber seal, it is easy to cause the cable core to "shrink" at the rubber seal position, affecting the thickness of the insulation layer of the electrical unit cable core, increasing the electric field strength here, and thus affecting the operational reliability of the electrical unit.

[0006] Secondly, there is a sealing method based on on-site injection molding of polyethylene materials. In principle, the polyethylene raw material is heated and melted onto the outer sheath (polyethylene) of the submarine cable using injection molding equipment. After solidification, an integral waterproof polyolefin part is formed, thereby achieving sealing at great water depths. In theory, the on-site injection molding of polyethylene has a better effect. However, the on-site injection molding process of polyethylene is very complicated and requires injection molding equipment. It takes a long time and is difficult to install, and it may damage the internal insulation layer of the electrical unit. Summary of the Invention

[0007] The present invention aims to address at least one of the technical problems existing in the related art. To this end, the present invention proposes a cable sealing connection device in which a compression tube is sleeved on the outside of the cable to effectively avoid the risk of excessive cable compression. The cured equivalent cross-sectional area of ​​the hot melt adhesive layer inside the compression tube is small. Even in deep water, the actual axial pressure exerted by the external water pressure on the hot melt adhesive layer is low, resulting in high feasibility and reliability.

[0008] A cable sealing connection device according to an embodiment of the present invention includes:

[0009] cables;

[0010] A compression tube, wherein the cable is passed through the compression tube, and the inner wall of the compression tube is provided with a hot melt adhesive layer;

[0011] The shell has a first hole section, the crimping tube is passed through the first hole section, a sealed cavity is formed between the shell and the crimping tube, one end of the shell is sealed with the cable, and the other end of the shell is suitable for sealing with the target device.

[0012] According to an embodiment of the present invention, the cable sealing connection device includes a cable, a crimping tube and an outer shell. The crimping tube is sleeved on the outer side of the cable, and the crimping tube is inserted into the first hole section of the outer shell. The inner wall of the crimping tube is provided with a hot melt adhesive layer, so that the inner wall of the crimping tube and the outer wall of the cable are connected through the hot melt adhesive layer. The hot melt adhesive layer fills the gap between the crimping tube and the outer sheath of the cable. The assembly operation is relatively easy, and the risk of over-compression of the cable core can be effectively avoided by controlling the size of the crimping tube. The cable can be an optical or electrical unit cable core, and the equivalent cross-sectional area of ​​the cured hot melt adhesive layer inside the crimping tube is small. Even in the case of large water depth, the actual axial pressure of the hot melt adhesive layer by the external water pressure is small, and the implementation feasibility and reliability are relatively high.

[0013] According to one embodiment of the present invention, the crimping tube includes a first tube section and a second tube section connected to each other, the first tube section is sealed to the cable and the outer shell by a colloid filled in the sealing cavity, the inner wall of the first tube section is provided with a hot melt adhesive layer, the outer wall of the first tube section is formed with a plurality of grooves, a sealing pad layer is provided between the second tube section and the cable, and the outer wall of the second tube section abuts the outer shell.

[0014] According to one embodiment of the present invention, the shell is provided with a glue injection port, the glue injection port is blocked by a plug, and the sealing gasket layer and the second pipe section abut against the barrier portion of the shell.

[0015] According to one embodiment of the present invention, one end of the shell is sealed and connected to the cable through a cover body, a sealed cavity is formed between the shell and the cover body, the cable is passed through the cover body, and the cover body and the cable are sealed and connected through a heat shrink tube and waterproof tape.

[0016] According to one embodiment of the present invention, the shell is provided with a second hole segment, the second hole segment is located on one side of the first hole segment, the second hole segment is separated from the first hole segment by a blocking portion of the shell, the cable is passed through the second hole segment, and a sealing assembly for closing the second hole segment is provided between the shell and the cable.

[0017] According to one embodiment of the present invention, the sealing assembly includes a pressure ring, a first sealing ring and a locking sleeve, the pressure ring abuts the housing, the first sealing ring is located between the pressure ring and the locking sleeve, and the locking sleeve is fixedly connected to the housing.

[0018] According to one embodiment of the present invention, a top cone is provided between the locking sleeve and the first sealing ring, a plurality of first sealing rings are provided, and the first sealing ring is a V-shaped sealing ring.

[0019] According to one embodiment of the present invention, the crimping tube is heated to a preset temperature, and the outer layer of the crimping tube is compressed by a tube shrinking machine so that the crimping tube and the cable have an interference fit, and the inner diameter of the crimping tube is less than or equal to the outer diameter of the cable by 0.5mm to 1mm.

[0020] According to one embodiment of the present invention, the hot melt adhesive layer is an acrylic coating, and the crimping tube is one of a copper tube, a silver tube and an aluminum alloy tube.

[0021] According to one embodiment of the present invention, a flange is provided at the other end of the housing, and a plurality of first mounting holes are formed in the flange. The housing is suitable for being fixedly connected to the target device with fasteners passing through the first mounting holes.

[0022] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 1. It is a structural schematic diagram of the connection state between the cable sealing connection device provided by an embodiment of the present invention and the target device;

[0025] Figure 2is a longitudinal cross-sectional structural diagram of a cable sealing connection device provided by an embodiment of the present invention and a target device in a connected state;

[0026] Figure 3 1 is a schematic structural diagram of a cable sealing connection device provided by an embodiment of the present invention;

[0027] Figure 4 is a schematic longitudinal cross-sectional view of a cable sealing connection device provided by an embodiment of the present invention;

[0028] Figure 5 1 is a schematic longitudinal cross-sectional view of the housing, cable, and components therebetween of a cable sealing connection device provided by an embodiment of the present invention;

[0029] Figure 6 This is a structural schematic diagram of the connection state of a cable and a crimping tube of a cable sealing connection device provided by an embodiment of the present invention;

[0030] Figure 7 1 is a schematic diagram of the three-dimensional structure of a crimping tube of a cable sealing connection device provided by an embodiment of the present invention;

[0031] Figure 8 1 is a schematic longitudinal cross-sectional view of a compression tube of a cable sealing connection device provided by an embodiment of the present invention;

[0032] Figure 9 This is a structural diagram of a state where a crimped tube and a cable are processed by a multi-claw tube shrinking machine according to an embodiment of the present invention;

[0033] Figure 10 1 is a schematic structural diagram of a sealing assembly of a cable sealing connection device provided by an embodiment of the present invention in an exploded state;

[0034] Figure 11 It is a structural schematic diagram of the exploded state of the flange of the housing of the cable sealing connection device provided by an embodiment of the present invention and the target device.

[0035] Reference numerals:

[0036] 1. Cable; 2. Compression tube; 21. First tube section; 22. Second tube section; 23. Hot melt adhesive layer; 24. Sealing gasket layer; 25. Groove; 3. Housing; 31. First hole section; 32. Second hole section; 33. Blocking part; 34. Glue filling port; 35. Plug; 36. Flange; 37. First mounting hole; 38. Bushing; 39. Second sealing ring; 310. First fastener; 4. Colloid; 5. Target device; 6. Cover; 61. Second fastener; 7. Heat shrink tubing and waterproof tape; 8. Compression ring; 9. First sealing ring; 10. Locking sleeve; 11. Top cone; 12. Connecting gasket; 13. Tube shrinking machine. DETAILED DESCRIPTION

[0037] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0038] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "multiple", "multiple roots", and "multiple groups" mean two or more.

[0039] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0040] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0042] The embodiments of the present invention, combined with Figures 1 to 11 As shown, a cable sealing connection device is provided.

[0043] refer to Figures 1 to 4 As shown, the cable sealing connection device includes a cable 1, a crimping tube 2 and a shell 3; the cable 1 is inserted into the crimping tube 2, and the inner wall of the crimping tube 2 is provided with a hot melt adhesive layer 23; the shell 3 is provided with a first hole section 31, and the crimping tube 2 is inserted into the first hole section 31, and a sealed cavity is formed between the shell 3 and the crimping tube 2, one end of the shell 3 is sealed with the cable 1, and the other end of the shell 3 is suitable for sealing with the target device 5.

[0044] The cable 1 is sealedly connected to the target device 5 via the outer shell 3, rather than directly connecting the cable 1 to the target device 5. This solves the problem of difficulty in directly connecting the cable 1 to the target device 5. A crimping tube 2 is sheathed on the outside of the cable 1. The crimping tube 2 is inserted into the first hole 31 of the outer shell 3. The inner wall of the crimping tube 2 is provided with a hot melt adhesive layer 23, connecting the inner wall of the crimping tube 2 to the outer wall of the cable 1 through the hot melt adhesive layer 23. The hot melt adhesive layer 23 fills the gap between the crimping tube 2 and the outer sheath of the cable 1.

[0045] The connection between the housing 3 and the target device 5 is a detachable connection, which can be a fastener connection, a snap connection, or other installation methods.

[0046] The cable sealing connection device of this embodiment has a low assembly operation difficulty, and can effectively avoid the risk of over-compression of the cable core by controlling the size of the crimping tube 2; wherein, the cable can be an optical or electrical unit cable core, and the equivalent cross-sectional area of ​​the cured hot melt adhesive layer 23 inside the crimping tube 2 is small. Even in the case of great water depth, the actual axial pressure of the external water pressure on the hot melt adhesive layer 23 is small, and the implementation feasibility and reliability are high.

[0047] In some embodiments, the crimping tube 2 is interference fit with the cable 1 to ensure that the cable 1 and the crimping tube 2 are tightly connected.

[0048] During the assembly process of the crimping tube 2 and the cable 1, the crimping tube 2 is sleeved on the outside of the cable 1, and the crimping tube 2 is heated to a preset temperature. The outer layer of the crimping tube 2 is compressed by the multi-tube shrinking machine 13 to make the crimping tube 2 and the cable 1 interference fit.

[0049] The preset temperature may be 80°C to 100°C, or 80°C to 120°C.

[0050] refer to Figure 1 、 Figure 2 and Figure 9 As shown, the crimping tube 2 is inserted into the position of the cable 1 that needs to be sealed, and a heating device (such as a hot drying gun) is used to uniformly heat the crimping tube 2 at a temperature below 100°C to heat the outside of the hot melt adhesive layer 23 on the inner wall of the crimping tube 2; then a tube shrinking machine 13 (such as a multi-claw tube shrinking machine) is used to uniformly compress the outer layer of the crimping tube 2, and try to make the outer circle of the crimping tube 2 after compression uniformly circular, so as to ensure the sealing effect and avoid excessive compression of the cable; after the crimping is completed, the heating device is continued to be used to heat the outside of the crimping tube 2 at a temperature within the range of 100°C to 120°C, wherein the outside of the pipe section of the crimping tube 2 with the hot melt adhesive layer 23 is uniformly heated, and the heating time is maintained at 5min to 10min to ensure that the hot melt adhesive layer 23 is completely melted and fills the small gap between the crimping tube 2 and the cable 1.

[0051] When the crimping tube 2 and the cable 1 are in interference fit, the inner diameter of the crimping tube 2 can be kept smaller than or equal to the outer diameter of the cable 1 by 0.5 mm to 1 mm. The inner diameter and outer diameter here can be diameters.

[0052] In some cases, the hot melt adhesive layer 23 may be an acrylic coating, and the crimping tube 2 may be a copper tube. Generally, the inner diameter of the crimping tube 2 is preferably 0.5 mm to 1 mm smaller than the outer diameter of the cable. The cable may be an optical or electrical submarine cable. Of course, the hot melt adhesive layer 23 may also be other heat-melting adhesives, and the crimping tube 2 may be other metal tubes, such as silver or aluminum alloy tubes.

[0053] When the crimping tube 2 is made of metal, it is recommended to use a material with good corrosion resistance and high ductility, such as copper. There is a hot melt adhesive layer 23 inside the crimping tube 2. The hot melt adhesive layer 23 is recommended to use a glue material with good bonding performance and high corrosion resistance, such as acrylic glue. It is evenly compressed onto the outer sheath of the cable through a tube shrinker. By heating the outer surface of the crimping tube 2, the hot melt adhesive layer 23 inside the crimping tube 2 is melted, so that the hot melt adhesive layer 23 fills the gap between the crimping tube 2 and the outer sheath of the cable 1, so that the actual axial pressure of the external water pressure on the hot melt adhesive layer 23 is small, which is suitable for deep water environment and has high implementation feasibility and reliability.

[0054] In some embodiments, reference Figures 5 to 8As shown, the crimping tube 2 includes a first tube section 21 and a second tube section 22 connected to each other. A hot melt adhesive layer 23 is provided on the inner side of the first tube section 21. The first tube section 21 is sealed and connected to the cable 1 and the outer shell 3 through the colloid 4 filled in the sealing cavity. The colloid 4 seals the outer shell 3, the cable 1 and the crimping tube 2. The sealing effect and connection stability of the outer shell 3, the cable 1 and the crimping tube 2 can be guaranteed.

[0055] A groove 25 is formed on the outer wall of the first tube section 21 to increase the contact area between the colloid 4 and the first tube section 21 , thereby improving the connection stability and sealing effect between the first tube section 21 and the housing. The structure is simple and easy to process.

[0056] The outer wall of the second tube section 22 abuts against the outer shell 3. The second tube section 22 cooperates with the outer shell 3 to prevent the colloid 4 in the corresponding area of ​​the first tube section 21 from overflowing through the side where the second tube section 22 is located. The second tube section 22 cooperates with the outer shell 3 to play a contact sealing role. The second tube section 22 and the outer shell 3 can also be bonded and sealed by the overflowing colloid 4, which has a better sealing effect.

[0057] A sealing gasket layer 24 is provided between the second pipe section 22 and the cable 1. The sealing gasket layer 24 prevents the hot melt adhesive layer 23 from overflowing. The sealing gasket layer 24 cooperates with the hot melt adhesive layer 23 to seal the connection cable 1. The sealing gasket layer 24 may be a polyurethane gasket layer. The polyurethane gasket layer is relatively soft, with a recommended hardness of 90-95A. This prevents excessive overflow of the molten hot melt adhesive layer 23 and also serves as a second mechanical seal.

[0058] The ends of the sealing gasket layer 24 and the second tube segment 22 abut against the barrier portion 33 of the housing 3. The barrier portion 33 not only positions the second tube segment 22 and the sealing gasket layer 24, but also prevents the colloid 4 from overflowing. It should be noted that the barrier portion 33 must include a hole for the cable 1 to pass through, ensuring that the cable 1 penetrates the housing 3. The housing 3 can also be designed without a barrier portion. In this case, end caps can be fitted at the ends of the housing 3 to position, secure, and limit the second tube segment 22 and the sealing gasket layer 24. The housing 3 can have various structures, and the specific structure can be selected based on needs.

[0059] In combination with the above, the crimping tube 2 is a cylindrical thin tube adapted to the cable 1, with several grooves 25 on the outside. It is divided into two sections according to its inner diameter. The inner diameter of the first tube section 21 is close to the outer diameter of the cable 1, and the inner wall of the first tube section 21 has a hot melt adhesive layer 23, such as an acrylic coating. The wall thickness of the hot melt adhesive layer 23 is required to be uniform, and spiral gluing is recommended; the inner wall of the second tube section 22 is bonded with a sealing pad layer 24, such as a polyurethane pad, and the inner diameter of the sealing pad layer 24 is basically the same as the outer diameter of the cable 1.

[0060] In some embodiments, reference Figures 2 to 5As shown, the shell 3 is provided with a glue filling port 34, which is blocked by a plug 35. The colloid 4 is poured into the sealed cavity through the glue filling port 34, and then the glue filling port 34 is blocked by the plug 35, so that the sealed cavity is kept in a closed state to prevent water from entering the sealed cavity. The structure is simple and the processing is easy.

[0061] The sealing cavity cooperates with the compression tube 2 to surround the cable 1 therein, and the compression tube 2 sticks to the colloid 4 to ensure the sealing effect of the sealing cavity.

[0062] In some cases, the longitudinal cross-sectional area of ​​the sealing cavity decreases from large to small along the direction from the first tube section 21 to the second tube section 22, thereby enhancing the sealing effect between the cable 1, the crimping tube 2, and the housing 3, and preventing the colloid 4 from overflowing from one end of the second tube section 22. The longitudinal cross-sectional area can be understood as a cross-sectional area perpendicular to the axis of the cable.

[0063] In some embodiments, one end of the shell 3 is sealed with the cable 1 through a cover 6, that is, a cover 6 is provided on the side where the crimping tube 2 passes through the shell 3, and a sealed cavity is formed between the shell 3 and the cover 6, which has a simple structure and is easy to disassemble and assemble.

[0064] The cable 1 is passed through the cover 6 , and the cover 6 and the cable 1 are sealed by a heat shrink tube and a waterproof tape 7 to ensure the sealing performance between the cover 6 and the cable 1 . The structure is simple and the construction is convenient.

[0065] The cover 6 is detachably fixedly connected to the housing 3, such as by fastener connection, snap connection, plug connection, etc., which is convenient for assembly and disassembly, simple in structure, and low in cost. Figure 1 、 Figure 4 and Figure 5 As shown, the cover body 6 is configured as a flange structure, and the outer shell 3 is correspondingly provided with a plurality of threaded holes. The cover body 6 opens a plurality of second mounting holes, and is screwed and fixed to the outer shell 3 by a second fastener 61 passing through the second mounting hole, thereby realizing a fixed connection between the cover body 6 and the outer shell 3. The second fastener 61 is also equipped with a gasket for sealing connection, which has a simple structure, is easy to assemble and disassemble, and has low cost.

[0066] Use heat shrink tubing and waterproof tape 7 to fill the gap between the cover 6 and the cable, and then pour the colloid 4 into the interior of the sealed cavity along the glue filling port 34. The colloid 4 is required to have dense water-blocking properties, a volume expansion coefficient between 0.9 and 1.1 after solidification, good adhesion to metal materials, and high strength after curing. The colloid 4 can be a curing glue, and two-component epoxy resin glue, two-component polyurethane glue, polyethylene and other glues with good adhesion properties are recommended. After the colloid 4 is poured, use the plug 35 to cover the glue filling port 34 on the sealed cavity. After the colloid 4 solidifies, due to its expansion effect, it will ensure that the crimping tube 2 always has a positive pressure directed towards the cable. Its good adhesion to metal and dense water-blocking performance will ensure that water will not penetrate into the interior along its bonding surface and the colloid 4. The several grooves 25 on the outside of the crimping tube 2 make the bonding area between the colloid 4 and the crimping tube 2 larger. Combined with the tapered internal glue-filling structure of the sealed cavity, the pressure of the water pressure on the colloid 4 is transmitted to the crimping tube 2 and the colloid 4, thereby achieving a better force transmission effect among the crimping tube 2, the colloid 4 and the shell 3 under water pressure.

[0067] In some embodiments, the shell 3 is provided with a second hole section 32, which is located on one side of the first hole section 31. As the first hole section 31 approaches the second hole section 32, the aperture of the first hole section 31 gradually decreases, so that the longitudinal cross-sectional area of ​​the sealing cavity gradually decreases until the first hole section 31 and the second hole section 32 are separated by the barrier portion 33.

[0068] refer to Figure 4 、 Figure 5 and Figure 10 As shown, the second hole section 32 is separated from the first hole section 31 by a barrier portion 33 of the housing 3. The cable 1 is passed through the second hole section 32. A sealing assembly is provided between the housing 3 and the cable 1 to seal the second hole section 32. The sealing assembly seals the housing 3 and the cable 1 corresponding to the second hole section 32, that is, seals the other end of the housing 3 and the cable 1. The multiple seals between the housing 3 and the cable 1 provide a better sealing effect.

[0069] In some embodiments, the sealing assembly includes a pressure ring 8, a first sealing ring 9, and a locking sleeve 10. The pressure ring 8 abuts the baffle 33 of the housing 3, the first sealing ring 9 is located between the pressure ring 8 and the locking sleeve 10, and the locking sleeve 10 is fixedly connected to the housing 3. The locking sleeve 10 compresses and secures the first sealing ring 9 and the pressure ring 8 within the second hole section 32, thereby achieving a mechanical seal between the cable 1 and the housing 3. The inner wall of the locking sleeve 10 seals the cable 1, while the outer wall of the locking sleeve 10 seals the housing 3. The locking sleeve 10 can be screwed to the housing 3, resulting in a simple structure, convenient assembly and disassembly, and stable sealing performance.

[0070] Among them, the first sealing ring 9 can be provided with multiple, multiple sealing, sealing effect is better. The first sealing ring 9 can be a V-shaped sealing ring, an O-shaped sealing ring, a trapezoidal sealing ring and the like. The types of the first sealing ring 9 are various and can be selected according to needs.

[0071] In some embodiments, a top cone 11 is provided between the locking sleeve 10 and the first sealing ring 9 , and the first sealing ring 9 abuts against the locking sleeve 10 via the top cone 11 , which has a simple structure, is convenient for assembly and disassembly, and has good installation stability.

[0072] The pressure ring 8, several first sealing rings 9, top cone 11, and locking sleeve 10 are sequentially inserted into the second bore section 32. The external threads of the locking sleeve 10 are tightened with the internal threads of the housing 3. The deformation coefficient of the first sealing ring 9 is controlled when the locking sleeve 10 is tightened. The deformation coefficient is generally controlled within 8% to 10% to avoid excessive compression of the cable. The first sealing ring 9 provides a third seal for small amounts of water vapor or permeated water that passes through the first two seals (the locking sleeve 10 and top cone 11 can be understood as the first two seals). The multiple components of the sealing assembly work together to provide a reinforced seal within the second bore section 32, achieving excellent sealing effectiveness, a simple structure, and low cost.

[0073] In some embodiments, reference Figures 2 to 4 and Figure 11 As shown, a flange 36 is provided at the other end of the shell 3, and a plurality of first mounting holes 37 are opened in the flange 36. The shell 3 is suitable for being fixedly connected to the target device 5 with a first fastener 310 passing through the first mounting hole 37. The shell 3 and the target device 5 are sealed and connected through the flange, and the connection method is simple.

[0074] A connection gasket 12 is provided between the flange 36 and the target device 5 . The connection gasket 12 plays a sealing role and is used to fix the target device 5 and the housing 3 and ensure a sealing effect.

[0075] On the inner ring of flange 36, housing 3 is further provided with an outwardly protruding sleeve 38. The outer wall of sleeve 38 is provided with a sealing groove, and a second sealing ring 39 is disposed within the sealing groove to achieve a sealed connection between the outer wall of sleeve 38 and the inner wall of target device 5. Multiple sealing grooves may be provided, and correspondingly, multiple second sealing rings 39 may be provided. Second sealing rings 39 may be O-rings, V-rings, or the like, and the form of second sealing rings 39 is not limited.

[0076] like Figure 11 As shown, at least two second sealing rings 39 are installed in the corresponding sealing grooves of the shaft sleeve 38.

[0077] It should be noted that the cable sealing connection device in the above embodiment does not include the target device 5, and the cable sealing connection device is used to achieve a sealed connection between the cable and the target device 5. The cable may be an oil-filled submarine cable used in deep water environments. The cable sealing connection device can provide a feasible protection measure to prevent the problem of continuous oil leakage caused by damage to the lead alloy sheath of the oil-filled submarine cable during operation, thereby improving the reliability and service life of the oil-filled submarine cable without replacing the submarine cable.

[0078] refer to Figure 1 and Figure 2 As shown, a cavity space is formed in the target device 5 so that the cable 1 is connected to the device in the cavity space, thereby realizing the connection and transmission functions of the cable 1 .

[0079] The above embodiments are intended to illustrate the present invention only and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be encompassed by the scope of the claims of the present invention.

Claims

1. A cable sealing connection device, characterized in that: include: cables; A compression tube, wherein the cable is passed through the compression tube, and the inner wall of the compression tube is provided with a hot melt adhesive layer; a housing, wherein the housing is provided with a first hole section, the crimping tube is passed through the first hole section, a sealed cavity is formed between the housing and the crimping tube, one end of the housing is sealedly connected to the cable, and the other end of the housing is suitable for being sealedly connected to the target device; The compression tube includes a first tube section and a second tube section connected to each other. The first tube section is sealed to the cable and the housing via a colloid filled in the sealing cavity. A hot melt adhesive layer is provided on the inner wall of the first tube section. A plurality of grooves are formed on the outer wall of the first tube section. A sealing pad layer is provided between the second tube section and the cable. The outer wall of the second tube section abuts against the housing. One end of the shell is sealed and connected to the cable through a cover body, a sealed cavity is formed between the shell and the cover body, the cable is passed through the cover body, and the cover body and the cable are sealed and connected through a heat shrink tube and a waterproof tape.

2. The cable sealing connection device according to claim 1, characterized in that: The shell is provided with a glue injection port, which is blocked by a plug, and the sealing pad layer and the second pipe section abut against the blocking portion of the shell.

3. The cable sealing connection device according to claim 1, characterized in that: The shell is provided with a second hole section, the second hole section is located on one side of the first hole section, the second hole section is separated from the first hole section by a blocking portion of the shell, the cable is passed through the second hole section, and a sealing component for closing the second hole section is provided between the shell and the cable.

4. The cable sealing connection device according to claim 3, characterized in that: The sealing assembly includes a pressure ring, a first sealing ring and a locking sleeve. The pressure ring abuts against the housing. The first sealing ring is located between the pressure ring and the locking sleeve. The locking sleeve is fixedly connected to the housing.

5. The cable sealing connection device according to claim 4, characterized in that: A top cone is provided between the locking sleeve and the first sealing ring. A plurality of first sealing rings are provided, and the first sealing ring is a V-shaped sealing ring.

6. The cable sealing connection device according to any one of claims 1 to 5, characterized in that: The compression tube is heated to a preset temperature, and the outer layer of the compression tube is compressed by a tube shrinking machine so that the compression tube and the cable have an interference fit, and the inner diameter of the compression tube is less than or equal to the outer diameter of the cable by 0.5mm to 1mm.

7. The cable sealing connection device according to any one of claims 1 to 5, characterized in that: The hot melt adhesive layer is an acrylic ester coating, and the compression tube is one of a copper tube, a silver tube and an aluminum alloy tube.

8. The cable sealing connection device according to any one of claims 1 to 5, characterized in that: A flange is provided at the other end of the housing. The flange is provided with a plurality of first mounting holes. The housing is suitable for being fixedly connected to the target device with fasteners passing through the first mounting holes.

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