A high-capacity deep-sea optical cable junction box

Abstract

This application relates to a high-capacity deep-sea optical cable splice closure, belonging to the field of submarine optical cable connection technology. It includes two spaced-apart first trays and at least one fiber optic coil unit. One fiber optic coil unit is detachably disposed between the two first trays and is movably connected to both first trays, allowing the coil unit to move back and forth relative to the two first trays within a predetermined range along the length of the optical cable. The high-capacity deep-sea optical cable splice closure provided by this application features a split-type structure for the first trays. The fiber optic coil unit is movably connected to both first trays on either side to create a loose-fit connection, which greatly facilitates the connection between the subsequent socket and the protective inner cylinder, reduces the fitting precision required when connecting the socket and the protective inner cylinder, thereby appropriately reducing manufacturing precision, simplifying the structure, and reducing assembly difficulty. Furthermore, the loose-fit connection also ensures that the internal structure is not subjected to stress during assembly, protecting the optical fiber splice as much as possible.

Description

Technical Field

[0001] This application relates to the field of submarine optical cable connection technology, and in particular to a high-capacity deep-sea optical cable junction box. Background Technology

[0002] Currently, in submarine optical cable communication systems, submarine cable junction boxes are used to connect submarine optical cables and are an important component of the submarine optical cable communication system. Submarine optical cable junction boxes are mainly used in the following scenarios: they can be used to connect the same type of cable or different types of cables in new submarine cable projects, and they can be used for submarine cable maintenance to repair damaged submarine cables.

[0003] In related technologies, submarine optical cable splice boxes need to have strong mechanical properties and be resistant to seawater corrosion. Therefore, current submarine optical cable splice boxes have complex structures with many components, and the components need to have a good fit. This places high demands on the manufacturing and installation precision of the components. In actual construction, submarine optical cable splice boxes need to be integrated and installed on site. The construction site is usually located on a ship. The marine environment is variable and highly unstable, and the complexity of the splice box structure directly affects the installation time at sea, thereby increasing construction costs and risks. Summary of the Invention

[0004] This application provides a high-capacity deep-sea optical cable junction box to solve the problem that the complex structure of submarine optical cable junction boxes in related technologies leads to long on-site installation time and high installation requirements, which increases construction costs and risks.

[0005] This application provides a high-capacity deep-sea optical cable junction box, which includes:

[0006] The first tray is set with two intervals;

[0007] At least one fiber reel unit is detachably disposed between the two first trays and is movably connected to both first trays, so that the fiber reel unit can move back and forth relative to the two first trays within a preset range along the length of the optical cable.

[0008] In some embodiments, the fiber coil unit includes two connecting discs clamped on the first tray, each of the connecting discs having at least two first through holes;

[0009] The first tray is provided with at least one adjustment hole, which is oval in shape;

[0010] The first through hole and the adjustment hole are fitted together and a connecting pin is inserted therein.

[0011] In some embodiments, the connecting plate is provided with at least two elastic pads, which are located on the side of the connecting plate near the first tray and extend at least partially out of the connecting plate so as to abut against the first tray on the corresponding side when the connecting plate is connected to the first tray.

[0012] In some embodiments, the high-capacity deep-sea optical cable junction box further includes at least one second tray, which is disposed between the first trays, and each end of the second tray is movably connected to a fiber coil unit.

[0013] In some embodiments, a connector unit is provided at both the top and bottom of the fiber coil unit. The connector unit includes a first connector assembly and a second connector assembly detachably disposed on the first connector assembly. The first connector assembly is connected to the fiber coil unit. The second connector assembly and the first connector assembly form at least one first fiber holding area. The second connector assembly includes a second fiber holding area. The maximum total fiber capacity of the first fiber holding area and the second fiber holding area is not less than 68 cores.

[0014] In some embodiments, the size of the first connector assembly gradually decreases in the direction away from the fiber coil unit, and the first connector assembly is provided with at least one slot;

[0015] The second connector assembly includes two connector support covers, which are arc-shaped and detachably disposed on the first connector assembly to form the first fiber-receiving area with the slot. The top of the connector support cover is used to cooperate with the fiber fixing tape to form the second fiber-receiving area.

[0016] In some embodiments, a socket is provided at the end of the first tray away from the fiber coil unit, and an optical fiber protection unit is provided between the socket and the first tray. The optical fiber protection unit includes a fixing member and multiple flexible protective members of different sizes. One of the flexible protective members is detachably sleeved on the stainless steel tube of the optical fiber bundle extending from the socket. The fixing member is attached to and connected to the end face of the socket to fix the flexible protective member.

[0017] In some embodiments, the socket has a plurality of pin holes along its circumference;

[0018] The high-capacity deep-sea optical cable junction box also includes an inner protection unit, which includes a protective inner cylinder. The protective inner cylinder is sleeved on the socket. Both ends of the protective inner cylinder are provided with multiple second through holes along their circumference. A pin shaft for cooperating with the pin hole passes through the second through hole.

[0019] Pressure rings are fitted at both ends of the protective inner cylinder, and the pressure rings are placed on the pin to assist in the sealing connection between the protective inner cylinder and the heat shrink tubing fitted on it.

[0020] In some embodiments, the high-capacity deep-sea optical cable junction box further includes an outer protection unit, which includes a protective outer cylinder sleeved on the protective inner cylinder. Both ends of the protective outer cylinder are provided with a locking mandrel, a first locking sleeve, a second locking sleeve, a compression nut, and a bending protection component in sequence.

[0021] The locking mandrel is connected to the protective outer cylinder. The first locking sleeve and the second locking sleeve are sequentially sleeved on the locking mandrel. The clamping nut is used to sleeve on the locking mandrel, the first locking sleeve and the second locking sleeve, and one end is connected to the protective outer cylinder to receive and clamp the locking mandrel, the first locking sleeve and the second locking sleeve to fix the outer armor steel wire. The second locking sleeve extends at least partially out of the clamping nut and is connected to the bending protection component.

[0022] In some embodiments, the bending protection assembly has a tapered hole at one end near the second locking sleeve.

[0023] The beneficial effects of the technical solution provided in this application include:

[0024] This application provides a high-capacity deep-sea optical cable splice box. Due to the spaced arrangement of two first trays, a fiber coiling unit is detachably disposed between the two first trays and movably connected to both first trays. This allows the fiber coiling unit to move back and forth relative to the two first trays within a preset range along the length of the optical cable. Therefore, the first tray of this high-capacity deep-sea optical cable splice box has a half-and-half structure. The fiber coiling unit is movably connected to both first trays on either side to create a loose fit connection. This greatly facilitates the connection between the subsequent socket and the protective inner cylinder, reduces the fitting precision required when connecting the socket and the protective inner cylinder, and thus appropriately reduces manufacturing precision. It simplifies the structure and reduces assembly difficulty. Furthermore, the loose fit connection also ensures that the internal structure is not subjected to stress during assembly, protecting the optical fiber splice as much as possible. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A cross-sectional schematic diagram of a high-capacity deep-sea optical cable junction box provided for an embodiment of this application;

[0027] Figure 2 A schematic diagram of the internal structure of the high-capacity deep-sea optical cable junction box provided in this embodiment of the application, which only has a first tray;

[0028] Figure 3 A schematic diagram of the structure of the first tray of the high-capacity deep-sea optical cable splice box provided in the embodiments of this application;

[0029] Figure 4 A schematic diagram of the internal structure of the high-capacity deep-sea optical cable junction box provided in this application embodiment when a second tray is provided;

[0030] Figure 5 A schematic diagram of the structure of the second tray of the high-capacity deep-sea optical cable splice box provided in the embodiments of this application;

[0031] Figure 6 A schematic diagram of the connection plate of the large-capacity deep-sea optical cable junction box provided in the embodiments of this application;

[0032] Figure 7 An exploded view of the internal protection unit of the high-capacity deep-sea optical cable junction box provided in this application embodiment;

[0033] Figure 8 An exploded view of the internal structure housed within the inner protective unit of the high-capacity deep-sea optical cable junction box provided in this application embodiment;

[0034] Figure 9 A schematic diagram of the socket of the high-capacity deep-sea optical cable junction box provided in the embodiments of this application;

[0035] Figure 10 A cross-sectional schematic diagram of the socket of the high-capacity deep-sea optical cable junction box provided in the embodiments of this application;

[0036] Figure 11 A schematic diagram of the structure of the first connector assembly of the high-capacity deep-sea optical cable junction box provided in the embodiments of this application;

[0037] Figure 12 A schematic diagram of the joint support cover of the high-capacity deep-sea optical cable junction box provided in the embodiments of this application;

[0038] Figure 13 A schematic diagram showing the optical fiber connectors housed in the first and second fiber-retaining areas of the high-capacity deep-sea optical cable splice box provided in this application embodiment;

[0039] Figure 14 An exploded view of the outer protective unit of the high-capacity deep-sea optical cable junction box provided in this application embodiment;

[0040] Figure 15 A cross-sectional view of the high-capacity deep-sea optical cable junction box provided in this application embodiment when the second locking sleeve is removed;

[0041] Figure 16This is a cross-sectional view of the high-capacity deep-sea optical cable junction box provided in this application embodiment when the first and second locking sleeves are removed.

[0042] In the picture:

[0043] 1. First tray; 10. Adjustment hole; 11. First support plate; 12. Connecting end; 13. Clearance groove; 14. Fiber guide post; 15. Fiber separator;

[0044] 2. Fiber optic connector; 3. Fiber coil unit; 30. Connecting tray; 300. First through hole; 301. Connecting pin; 302. Elastic pad; 31. Fiber retaining tray; 4. Second tray; 40. Second support plate;

[0045] 5. Connector unit; 50. First connector assembly; 51. Second connector assembly; 510. Connector support cover; 52. First fiber optic accommodating area; 53. Second fiber optic accommodating area; 54. Slot; 55. Fiber optic fixing strap; 56. First connecting part; 57. Second connecting part;

[0046] 6. Socket; 60. Pin hole; 61. Fiber optic protection unit; 610. Fixing component; 611. Flexible protection component; 612. Anti-loosening nut; 613. Washer; 62. Plug; 63. Groove;

[0047] 7. Inner protective unit; 70. Protective inner cylinder; 71. Pin; 72. Pressure ring; 73. Heat shrink tubing; 74. Second through hole;

[0048] 8. Outer protection unit; 80. Protective outer cylinder; 81. Locking mandrel; 82. First locking sleeve; 83. Second locking sleeve; 84. Compression nut; 85. Bending protection assembly; 86. Separator ring. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] This application provides a high-capacity deep-sea optical cable junction box, which can solve the problems in related technologies where the structure of submarine optical cable junction boxes is complex, resulting in long on-site installation time and high installation requirements, which increases construction costs and risks.

[0051] See Figures 1 to 3As shown, this high-capacity deep-sea optical cable splice box includes two spaced-apart first trays 1 and at least one fiber coil unit 3. The two first trays 1 are spaced apart, and one fiber coil unit 3 is detachably disposed between the two first trays 1 and is movably connected to both first trays 1, so that the fiber coil unit 3 can move back and forth relative to the two first trays 1 within a preset range along the length of the optical cable. Therefore, the advantages of this high-capacity deep-sea optical cable splice box are that the first tray 1 has a half-and-half structure, and the fiber coil unit 3 is movably connected to the first trays 1 on both sides to create a loose fit connection, which greatly facilitates the connection between the subsequent socket 6 and the protective inner cylinder 70, reduces the fitting accuracy when the socket 6 and the protective inner cylinder 70 are connected, and thus appropriately reduces the manufacturing precision. Moreover, after the loose fit connection between the first tray 1 and the fiber coil unit 3 is achieved, the connection method between the first tray 1 and the socket 6 is not limited, and a very simple connection method such as bolt connection can be used. This simplifies the structure and reduces the assembly difficulty and time, thereby reducing the construction risk. In addition, the loose fit connection also ensures that the internal structure is not subjected to stress during assembly, and protects the optical fiber connector 2 as much as possible.

[0052] Further, see Figure 2 , Figure 3 and Figure 6 As shown, the fiber coil unit 3 includes two connecting discs 30 clamped on the first tray 1. Each connecting disc 30 has at least two first through holes 300, which are spaced apart, and at least one first through hole 300 matches one of the first trays 1. Each first tray 1 has at least one adjustment hole 10, which is oval in shape and parallel to the length direction of the optical cable. The first through hole 300 and the adjustment hole 10 are fitted together and a connecting pin 301 is inserted. That is, the number of first through holes 300 on a connecting disc 30 is the same as the number of all adjustment holes 10. After the first through hole 300 and the corresponding adjustment hole 10 are aligned, the connecting pin 301 passes through the first through hole 300 and the adjustment hole 10. The size of the connecting pin 301 can be the same as or smaller than the first through hole 300, but its diameter is the same as the width of the adjustment hole 10. Therefore, the connecting pin 301 can move back and forth along the length direction of the optical cable as needed.

[0053] Further, see Figure 6As shown, the connecting plate 30 is provided with at least two elastic pads 302. The elastic pads 302 are located on the side of the connecting plate 30 near the first tray 1 and at least partially extend out of the connecting plate 30, so that when the connecting plate 30 is connected to the first tray 1, it abuts against the first tray 1 on the corresponding side. Specifically, the connecting plate 30 is provided with at least two oblong grooves, and each oblong groove is provided with an elastic pad 302. The elastic pads 302 can be made of polytetrafluoroethylene. When the two connecting plates 30 are clamped on the first tray 1, the elastic pads 302 contact the first tray 1 and deform under the action of clamping force, so that there is friction between the connecting plate 30 and the first tray 1 while allowing relative movement, generating a certain amount of damping. The shape of the elastic pads 302 can be a cylinder, cuboid, cube, etc. In this embodiment, the elastic pads 302 are preferably cylindrical.

[0054] Further, see Figures 2 to 5 and Figure 7 As shown, the high-capacity deep-sea optical cable junction box also includes at least one second tray 4, which is located between the first trays 1, and each end of the second tray 4 is movably connected to a fiber coiling unit 3. The structure of the second tray 4 is similar to that of the first tray 1. The first tray 1 mainly includes a first support plate 11 and a connecting end 12 located at one end of the support plate. The connecting end 12 is used to connect and fix with the socket 6. The connecting end 12 has a through hole for the optical fiber bundle to pass through. The first support plate 11 has an adjustment hole 10 on the side away from the connecting end 12. The first support plate 11 has a clearance groove 13 to avoid the optical fiber bundle passing through the through hole of the connecting end 12. The first support plate 11 and the connecting plate 30 form a fiber coiling area for the winding of optical fibers. The ends of the two connecting plates 30 that are farther apart are also provided with fiber blocking plates 31. Since the second tray 4 does not need to be connected to the socket 6, the second tray 4 mainly includes a second support plate 40. The second support plate 40 is a pair of... The structure of the second tray 40 is almost identical to that of the first tray 11 on one side. Each side of the second tray 40 is provided with adjustment holes 10 of the same size as those on the first tray 11. The second tray 40 is used to cooperate with the two first trays 11 located on its two sides to fix the fiber coil unit 3. This high-capacity deep-sea optical cable splice box, by adding a second tray 4, further expands the space for fiber coiling without significantly increasing the circumferential dimension, thus doubling the structural fiber capacity. In addition, the number of second trays 4 can be two, three, or even more, which can further expand the structural fiber capacity on the basis of the above, and make the product have good modular performance, which can adapt to the splicing requirements of different fiber pairs of submarine cables. Among them, both the first tray 11 and the second tray 40 are provided with fiber guide posts 14, and fiber separators 15 are also passed through the fiber guide posts 14, which are used to separate the optical fibers coiled in the coil area.

[0055] Further, see Figure 1 and Figures 11 to 13As shown, a connector unit 5 is provided at both the top and bottom of the fiber coil unit 3. The connector unit 5 is mainly used to accommodate the fiber optic connector 2 after the connector is attached. The connector unit 5 mainly includes a first connector assembly 50 and a second connector assembly 51 detachably mounted on the first connector assembly 50. The first connector assembly 50 is connected to the fiber coil unit 3, that is, the first connector assembly 50 is connected to the connecting tray 30 on the same side. The second connector assembly 51 is detachably mounted on the first connector assembly 50 and can form at least a first fiber holding area 52 with the first connector assembly 50. The second connector assembly 51 itself includes a second fiber holding area 53. The maximum total fiber capacity of the first fiber holding area 52 and the second fiber holding area 53 is not less than 68 cores. Therefore, this high-capacity deep-sea optical cable connector box can accommodate at least 136 fibers, which is much greater than the conventional fiber capacity of 48 cores. As the number of second trays 4 increases, the number of connector units 5 increases accordingly. Therefore, the overall fiber capacity is greatly improved.

[0056] Further, see Figure 11As shown, the size of the first connector assembly 50 gradually decreases in the direction away from the fiber coil unit 3. The first connector assembly 50 is provided with at least one slot 54. The second connector assembly 51 includes two connector support covers 510. The connector support covers 510 are arc-shaped and detachably provided on the first connector assembly 50 to form a first fiber-receiving area 52 with the slot 54. The top of the connector support cover 510 is used to cooperate with the fiber fixing tape 55 to form a second fiber-receiving area 53. Specifically, the first connector assembly 50 has a symmetrical structure, and preferably has two slots 54, symmetrically arranged on both sides. The first connector assembly 50 is a semi-cylinder with slots 54 on both sides. The end face between the two slots 54 has a concave surface and a threaded hole connected to the connecting plate 30. Each slot 54 has a first connecting part 56 above it, and the connector support cover 510 has a second connecting part 57 that mates with the first connecting part 56. The first connecting part 56 and the second connecting part 57 are connected by screws. The inner arc surface of the connector support cover 510 can mate with the arc surface of the first connector assembly 50. When the fiber optic connector 2 is housed in the slot 54, the connector support cover 510 is not connected to the first connector assembly 50. After the slot 54 is filled with fiber optic connectors 2, the connector support cover 510 is then connected to the first connector assembly 50. The connector support cover 510 and the slot 54 form the first fiber-receiving area 52, preventing the fiber optic connectors 2 in the slot 54 from falling out. Since the surface of the connector support cover 510 is arc-shaped, the fiber optic connectors 2 can be placed sequentially along the surface of the connector support cover 510, and each layer of fiber optic connectors 2 is provided with a fiber fixing strap 55 to fix the fiber optic connectors 2 on the surface of the connector support cover 510. By rationally designing the structure of the first connector assembly 50 and the connector support cover 510, the space is fully utilized to accommodate the fiber optic connectors 2, greatly increasing the fiber capacity, while the overall size is not significantly increased compared to similar products. This avoids the problem that the product size is too large, making it difficult for the connector box to meet the construction requirements of wheel hubs and burial plows.

[0057] Further, see Figure 7 , Figure 9 and Figure 10As shown, a socket 6 is provided at the end of the first tray 1 furthest from the fiber coil unit 3. The socket 6 is generally conical, with a conical hole inside for threading an optical fiber bundle covered with inner armor wire. The inner wall of the conical hole in the socket 6 is threaded for engaging with a plug 62. The plug 62 is rotated into the conical hole of the socket 6 to fix the inner armor wire on the optical fiber bundle. When the optical fiber bundle exits from the larger end of the conical hole in the socket 6, the optical fiber bundle is fragile and easily damaged, which will affect the transmission of optical signals. Therefore, an optical fiber protection unit 61 is provided between the socket 6 and the first tray 1. The optical fiber protection unit 61 mainly includes a fixing member 610 and multiple flexible protective members 611 of different sizes. The different sizes of the flexible protective members 611 mainly refer to the different sizes of the through holes on the flexible protective members 611, so as to be suitable for threading optical fiber bundles with different core numbers. One of the flexible protective members 611 is detachably fitted onto the optical fiber bundle extending out of the socket 6. On the stainless steel tube, a flexible protective element 611 is fitted onto the optical fiber bundle. A gasket 613 and an anti-loosening nut 612 are sequentially provided between the flexible protective element 611 and the plug 62. The through-hole of the flexible protective element 611 has rounded corners to protect the optical fiber bundle and prevent it from being cut by burrs or sharp edges of structural components. The flexible protective element 611 has a circular stepped shape, which can be embedded into the stepped inner hole of the fixing element 610. A groove 63 is provided on the end face of the socket 6. The fixing element 610 is embedded in the groove 63, fitting against the end face of the socket 6 and connected by threads to fix the flexible protective element 611. In addition, the end face of the socket 6 also has a threaded hole connected to the first tray 1 for bolt connection and fixation.

[0058] Further, see Figure 8 and Figure 9As shown, the socket 6 has multiple pin holes 60 along its circumference. The high-capacity deep-sea optical cable junction box also includes an inner protection unit 7, which mainly includes a protective inner cylinder 70. The protective inner cylinder 70 is fitted onto the socket 6 and is used to house internal structural parts such as the first tray 1, the fiber coil unit 3, and the connector unit 5, thus providing protection. Both ends of the protective inner cylinder 70 have multiple second through holes 74 along its circumference. Pins 71 for engaging with the pin holes 60 are inserted into the second through holes 74. That is, the second through holes 74 engage with the pin holes 60 and are each fitted with pins 71 to connect and fix the protective inner cylinder 70 to the socket 6. Since the first tray 1 and the connecting plate 30 are loosely fitted, when the protective inner cylinder 70 is connected and fixed to the socket 6, even if there is an error, it can be adjusted within a suitable range, which greatly reduces the manufacturing precision requirements of the relevant parts, reduces the installation difficulty, and increases the installation efficiency. The inner protective unit 7 also includes two heat-shrinkable sleeves 73. The two heat-shrinkable sleeves 73 are used to heat-shrink and seal the two ends of the inner protective cylinder 70. Since the inner protective cylinder 70 is provided with a second through hole 74, in order to prevent poor sealing due to gaps between the heat-shrinkable sleeves 73 and the inner protective cylinder 70, pressure rings 72 are also provided at both ends of the inner protective cylinder 70. The pressure rings 72 cover the pins 71 so that the surface of the entire inner protective cylinder 70 is complete and flat, which is used to assist the inner protective cylinder 70 in sealing the heat-shrinkable sleeves 73. By setting the pressure rings 72 to cover the internal gaps, the outline of the internal structural components is made flat, ensuring the fit of the heat-shrinkable sleeves 73. The structural defects of the heat-shrinkable sleeves 73 are avoided. Compared with injection molding sealing, the sealing method of heat-shrinkable sleeves 73 and pressure rings 72 is simple, low-cost, and time-saving, simplifying the overall installation process and reducing the difficulty.

[0059] Further, see Figure 14As shown, the high-capacity deep-sea optical cable junction box also includes an outer protection unit 8. The outer protection unit 8 is mainly used to fix the outer armor steel wire of the optical cable. The outer protection unit 8 mainly includes a protective outer cylinder 80 sleeved on the protective inner cylinder 70. Both ends of the protective outer cylinder 80 are provided with a locking mandrel 81, a first locking sleeve 82, a second locking sleeve 83, a clamping nut 84, and a bending protection component 85 in sequence. The locking mandrel 81 is connected to the protective outer cylinder 80 by bolts. The first locking sleeve 82 and the second locking sleeve 83 are sleeved on the locking mandrel 81 in sequence. There are clamping nuts between the locking mandrel 81 and the first locking sleeve 82, and between the first locking sleeve 82 and the second locking sleeve 83. A separator ring 86 is provided. The locking mandrel 81 clamps a portion of the outer armor steel wire by engaging with the tapered hole on the first locking sleeve 82 through its tapered surface. The first locking sleeve 82 clamps the remaining outer armor steel wire by engaging with the tapered hole on the second locking sleeve 83 through its tapered surface. The separator ring 86 is used to separate the outer armor steel wire. The clamping nut 84 is used to be sleeved on the locking mandrel 81, the first locking sleeve 82 and the second locking sleeve 83, and one end is connected to the protective outer cylinder 80 to receive and clamp the locking mandrel 81, the first locking sleeve 82 and the second locking sleeve 83 to fix the outer armor steel wire. The second locking sleeve 83 extends at least partially out of the clamping nut 84 and is connected to the bending protection component 85.

[0060] For details, see Figures 15 to 16 As shown, this outer protection unit 8 can be applied to many different types of optical cables. When splicing an SA type optical cable, simply remove the first locking sleeve 82 and its corresponding separator ring 86 from the outer protection unit 8, and then replace the second locking sleeve 83 to adjust its inner diameter. When splicing an LW type optical cable, remove the first locking sleeve 82, the second locking sleeve 83, and the two separator rings 86 from the outer protection unit 8, and then replace the locking mandrel 81 and the clamping nut 84 to adjust their dimensions. Therefore, the structure of the outer protection unit 8 allows it to adapt to different cable types with only minor modifications, ensuring product compatibility. For this high-capacity deep-sea optical cable junction box, most of its parts are interchangeable between different cable types, exhibiting good compatibility and meeting the splicing needs of submarine optical cables produced by various manufacturers. It includes a wide variety of types and has a high degree of compatibility.

[0061] Furthermore, the bending protection component 85 has a tapered hole at one end near the second locking sleeve 83. Specifically, in order to prevent the submarine cables at both ends from bending excessively, the bending protection component 85 has a tapered hole on its end face. The taper of the tapered hole is consistent with the taper of the inner hole of the second locking sleeve 83 to prevent interference between the outer armor steel wire of the optical cable and the bending protection component 85.

[0062] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0063] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0064] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A large capacity deep sea optical cable jointing box, characterized by, It includes: The first tray (1) is set with two intervals; At least one fiber coil unit (3) is detachably disposed between two first trays (1) and is movably connected to both first trays (1) so that the fiber coil unit (3) can move back and forth relative to the two first trays (1) within a preset range along the length of the optical cable; The fiber coil unit (3) includes two connecting discs (30) clamped on the first tray (1), and each connecting disc (30) is provided with at least two first through holes (300). The first tray (1) is provided with at least one adjustment hole (10), and the adjustment hole (10) is oval in shape; The first through hole (300) and the adjustment hole (10) are fitted together and a connecting pin (301) is inserted therein; The first tray (1) has a socket (6) at one end away from the fiber coil unit (3). An optical fiber protection unit (61) is provided between the socket (6) and the first tray (1). The optical fiber protection unit (61) includes a fixing member (610) and a plurality of flexible protective members (611) of different sizes. One of the flexible protective members (611) is detachably sleeved on the stainless steel tube of the optical fiber bundle extending out of the socket (6). The fixing member (610) is attached to and connected to the end face of the socket (6) to fix the flexible protective member (611). The socket (6) is provided with a plurality of pin holes (60) along its circumference; The high-capacity deep-sea optical cable junction box also includes an inner protection unit (7), which includes a protective inner cylinder (70). The protective inner cylinder (70) is sleeved on the socket (6). Both ends of the protective inner cylinder (70) are provided with multiple second through holes (74) along its circumference. A pin (71) for cooperating with the pin hole (60) is inserted in the second through hole (74). Pressure rings (72) are also fitted at both ends of the protective inner cylinder (70). The pressure rings (72) are covered on the pin (71) to assist the protective inner cylinder (70) in sealing connection with the heat shrink tubing (73) fitted on it.

2. The high-capacity deep-sea optical cable junction box as described in claim 1, characterized in that: The connecting plate (30) is provided with at least two elastic pads (302). The elastic pads (302) are located on the side of the connecting plate (30) close to the first tray (1) and extend at least partially out of the connecting plate (30) so that when the connecting plate (30) is connected to the first tray (1), it abuts against the first tray (1) on the corresponding side.

3. A high-capacity deep-sea optical cable junction box as described in claim 1, characterized in that: The high-capacity deep-sea optical cable junction box also includes at least one second tray (4), which is located between the first trays (1), and each end of the second tray (4) is movably connected to a fiber coil unit (3).

4. A high-capacity deep-sea optical cable junction box as described in claim 1, characterized in that: The fiber coil unit (3) is provided with a connector unit (5) at both the top and bottom. The connector unit (5) includes a first connector assembly (50) and a second connector assembly (51) detachably disposed on the first connector assembly (50). The first connector assembly (50) is connected to the fiber coil unit (3). The second connector assembly (51) and the first connector assembly (50) form at least one first fiber holding area (52). The second connector assembly (51) includes a second fiber holding area (53). The maximum total fiber holding capacity of the first fiber holding area (52) and the second fiber holding area (53) is not less than 68 cores.

5. A high-capacity deep-sea optical cable junction box as described in claim 4, characterized in that: The size of the first connector assembly (50) gradually decreases in the direction away from the fiber coil unit (3), and the first connector assembly (50) is provided with at least one slot (54). The second connector assembly (51) includes two connector support covers (510), which are arc-shaped and detachably disposed on the first connector assembly (50) to form the first fiber-receiving area (52) with the slot (54). The top of the connector support cover (510) is used to cooperate with the fiber fixing tape to form the second fiber-receiving area (53).

6. A high-capacity deep-sea optical cable junction box as described in claim 1, characterized in that: The high-capacity deep-sea optical cable junction box also includes an outer protection unit (8), which includes a protective outer cylinder (80) sleeved on the protective inner cylinder (70). Both ends of the protective outer cylinder (80) are provided with a locking mandrel (81), a first locking sleeve (82), a second locking sleeve (83), a clamping nut (84), and a bending protection component (85). The locking mandrel (81) is connected to the protective outer cylinder (80). The first locking sleeve (82) and the second locking sleeve (83) are sequentially sleeved on the locking mandrel (81). The clamping nut (84) is used to sleeve on the locking mandrel (81), the first locking sleeve (82) and the second locking sleeve (83), and one end is connected to the protective outer cylinder (80) to receive and clamp the locking mandrel (81), the first locking sleeve (82) and the second locking sleeve (83) to fix the outer armor steel wire. The second locking sleeve (83) extends at least partially out of the clamping nut (84) and is connected to the bending protection assembly (85).

7. A high-capacity deep-sea optical cable junction box as described in claim 6, characterized in that: The bending protection component (85) has a tapered hole at one end near the second locking sleeve (83).

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