An eccentrically structured fiber hydrophone array

Abstract

The application relates to the technical field of seabed communication and discloses an eccentric structure optical fiber hydrophone array which comprises a cable main body, an eccentric glue-filling plug core assembly fixedly arranged at one end of the cable main body, a threaded adapter assembly fixedly arranged outside the cable main body and located at one side of the eccentric glue-filling plug core assembly, and a support framework assembly fixedly installed outside the cable main body and located at the side, away from the eccentric glue-filling plug core assembly, of the threaded adapter assembly. The hydrophone and the delay line are oppositely arranged inside the fiber-receiving box. Compared with a single hydrophone, the delay line can flexibly adjust parameters such as the length of the wound optical fiber according to requirements. The parameters of the hydrophone are determined in advance, project time is shortened, and cost is saved. Through the V-shaped ring multilayer sealing structure, the V-shaped ring sealing nut can press the V-shaped ring pressing ring, the V-shaped ring middle ring and the V-shaped ring supporting ring, radial sealing force is generated, and high sealing performance is achieved.

Description

Technical Field

[0001] This invention belongs to the field of submarine communication technology, specifically relating to an eccentric fiber optic hydrophone array. Background Technology

[0002] Traditional fiber optic hydrophone arrays typically use a coaxial assembly method, which means that components such as hydrophones and fiber optic take-up boxes are installed with the optical cable axis aligned.

[0003] This structure has the following problems in practical use: When existing fiber optic hydrophones are damaged, the entire assembly needs to be disassembled and replaced, which is complicated and costly; the coaxial structure is prone to stress concentration in the high-pressure environment of the deep sea, affecting the long-term reliability of the optical fiber; the bending radius at the connection between the optical cable and the component is small, which can easily lead to the bending and damage of the optical fiber.

[0004] Therefore, there is an urgent need for a fiber optic hydrophone array solution with a more reasonable structure, easier maintenance, and higher reliability. Summary of the Invention

[0005] This invention proposes an eccentric fiber optic hydrophone array, which solves the problem that existing fiber optic hydrophones require the entire assembly to be disassembled and replaced when the hydrophone or fiber take-up box is damaged, resulting in a complex and costly repair process.

[0006] The technical solution of the present invention is as follows: an eccentric fiber optic hydrophone array, comprising: a cable body;

[0007] An eccentric glue-filled core assembly is fixedly installed at one end of the cable body;

[0008] A threaded adapter assembly is fixedly installed on the outside of the cable body, and the threaded adapter assembly is located on one side of the eccentric potting and plugging core assembly;

[0009] A support frame assembly is fixedly installed on the outside of the cable body. The support frame assembly is located on the side of the threaded adapter assembly away from the eccentric potting and plugging core assembly.

[0010] A fiber take-up box assembly is fixedly installed on the outside of the cable body, and the fiber take-up box assembly is located on the side of the support frame assembly away from the threaded adapter assembly.

[0011] The fiber take-up box assembly contains, from front to back, a reference arm and delay line assembly, and a signal arm and hydrophone assembly.

[0012] Preferably, the eccentric glue-filling and plugging assembly includes an eccentric glue-filling and plugging body fixedly disposed outside the cable body. A V-ring pressure ring is disposed inside the eccentric glue-filling and plugging body. A V-ring inner ring is disposed inside the eccentric glue-filling and plugging body, with the tip of the inner ring located inside the V-ring pressure ring. A V-ring support ring is disposed inside the eccentric glue-filling and plugging body, with the tip of the support ring located inside the inner ring. A V-ring pressure ring flange is disposed inside the eccentric glue-filling and plugging body. A V-ring sealing nut is disposed inside the eccentric glue-filling and plugging body. A sealing groove is formed on the outer surface of the V-ring sealing nut. A sealing ring is movably disposed inside the sealing groove, and the cross-sectional diameter of the sealing ring is larger than the internal size of the sealing groove. An optical fiber protective pad is fixedly installed inside the eccentric glue-filling and plugging body.

[0013] Preferably, the eccentric glue-filling plug body is divided into an eccentric glue-filling plug upper cover and an eccentric glue-filling plug lower cover, and the internal threads of the eccentric glue-filling plug upper cover are fitted with fixing screws.

[0014] Preferably, the eccentric glue-filling core assembly is externally heat-shrinkable with a heat-shrinkable tube, and the connection between the heat-shrinkable tube and the cable body is heat-sealed with injection molding compound.

[0015] Preferably, the threaded adapter assembly includes a threaded adapter upper cover and a threaded adapter lower cover that are sleeved on the outside of the cable body. The outer surface of the threaded adapter lower cover has a threaded connection hole, and a connecting screw is installed in the internal thread of the threaded connection hole.

[0016] Preferably, the support frame assembly includes an upper support frame and a lower support frame sleeved on the outside of the cable body. The outer surface of the lower support frame is fixedly installed with mounting holes, and a fixing bolt is installed in the internal thread of the mounting holes. One end of the fixing bolt passes through the mounting holes and is threadedly connected to the upper support frame.

[0017] Preferably, the fiber optic cable assembly includes a top cover and a bottom cover that are fitted onto the outside of the cable body. The outer surface of the bottom cover has a first screw hole, and a first pan head screw is installed in the internal thread of the first screw hole. An eccentric double-hole fiber optic cable is fixedly mounted on the top of the bottom cover by the first pan head screw. The top and bottom surfaces of the eccentric double-hole fiber optic cable have fixing holes. The outer surface of the top cover has a second screw hole, and a second pan head screw is installed in the internal thread of the second screw hole.

[0018] Preferably, the outer surface of the eccentric potting plug body is provided with a connecting groove, and there are multiple connecting grooves.

[0019] Preferably, the tip of the connecting screw passes through the threaded connection hole and is threadedly connected to the top cover of the threaded adapter.

[0020] Preferably, the tip of the No. 2 pan head screw passes through the No. 2 screw hole and is threadedly connected to the bottom cover of the fiber collection box.

[0021] The working principle and beneficial effects of this invention are as follows:

[0022] Compared to a hydrophone and delay line located inside the fiber optic cable housing, and a standalone hydrophone, the advantages are that the delay line can be flexibly adjusted according to requirements, such as the length of the fiber optic cable wound around it; and the hydrophone's parameters can be fixed in advance, allowing for material preparation, shortening project time, and saving costs.

[0023] Innovative fiber optic take-up box assembly and eccentric layout: The fiber optic take-up box assembly features an asymmetrical eccentric layout, specifically encasing the hydrophone entirely within the eccentric dual-hole take-up box, achieving mechanical decoupling between the hydrophone unit and the fiber optic trunk. This "encased" design not only provides robust physical protection for the hydrophone against deep-sea impacts, but more importantly, it allows for individual replacement of the internal hydrophone unit without disassembling the entire cable system, simply by opening the top cover of the take-up box. This significantly improves the convenience and cost-effectiveness of subsequent maintenance. The eccentric dual-hole design provides ample and controlled coiling space for redundant optical fibers, ensuring that the fiber bending radius is far greater than the safety threshold, thus avoiding signal loss.

[0024] Multifunctional Threaded Adapter Assembly: Beyond serving as a mechanical interface connecting adjacent hydrophone array units, the threaded adapter assembly's deeper innovation lies in its function as a "structural stress interruptor." Through high-strength threaded connections, it effectively transfers and distributes tensile and torsional loads from the cable body to the supporting frame assembly, ensuring that the core fiber take-up box assembly and hydrophones are protected from direct external mechanical stress. This design clearly defines the boundaries between functional modules (sealing, load-bearing, sensing), preventing interference and significantly improving the reliability and lifespan of the entire array in complex marine environments.

[0025] Innovations in the potting and plugging section: The eccentric potting and plugging assembly adopts an innovative design that combines multi-layer composite sealing with flexible protection to ensure absolute sealing and fiber optic safety in deep-sea high-pressure environments.

[0026] The sealing mechanism combines dynamic and static elements: A multi-layered V-ring sealing structure (V-ring pressure ring, middle ring, and support ring) generates a self-reinforcing radial sealing force when the V-ring sealing nut is tightened, forming a dynamically compensated V-ring main seal. Simultaneously, the sealing ring with a cross-sectional diameter larger than its depth within the sealing groove undergoes pre-compression when the nut is tightened, forming the first static sealing barrier. This combination of dynamic and static elements ensures reliable sealing performance even under significant water pressure changes and temperature fluctuations.

[0027] Dual locking mechanism of potting and structure: The eccentric potting core adopts a split design (upper and lower covers), and after being tightened with fixing screws, its internal cavity is filled with high-pressure potting compound. The cured potting compound not only completely encapsulates the fiber optic connector, achieving stress relief and optical performance stability, but also works with the V-ring assembly and fiber optic protective pad to form an incompressible and displacement-resistant "colloidal locking structure" on the outside of the cable body. This "mechanical seal + potting fixation" method fundamentally eliminates axial water seepage paths.

[0028] "Soft landing" protection for optical fibers: The internal fiber protection pad uses flexible buffer material to fix the main body of the cable and prevent it from directly contacting the metal parts, thus preventing stress damage and micro-bending loss. The potting compound also provides a stress-free "soft" environment for the optical fiber after curing, together ensuring the absolute dryness and safety of the optical fiber channel in the high-pressure environment of the deep sea. Attached Figure Description

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a front view of the present invention;

[0032] Figure 3 This is a cross-sectional view of the present invention;

[0033] Figure 4 This is a schematic diagram of the overall structure of the eccentric potting and plugging core assembly of the present invention;

[0034] Figure 5 This is a cross-sectional view of the eccentric potting plug assembly of the present invention;

[0035] Figure 6 This is a schematic diagram of the overall structure of the support frame assembly of the present invention;

[0036] Figure 7 This is an exploded view of the fiber take-up box assembly of the present invention;

[0037] Figure 8 This is the bottom view of an exploded view of the fiber take-up box assembly of the present invention.

[0038] In the diagram: 1. Cable body; 2. Eccentric potting and plugging assembly; 21. Eccentric potting and plugging body; 22. V-ring compression ring; 23. V-ring inner ring; 24. V-ring support ring; 25. V-ring compression ring flange; 26. V-ring sealing nut; 27. Sealing groove; 28. Sealing ring; 29. ​​Fiber optic protective pad; 3. Threaded adapter assembly; 31. Threaded adapter upper cover; 32. Threaded adapter lower cover; 33. Threaded connection hole; 34. Connecting screw; 4. Support frame assembly; 41. Upper support frame; 42. Lower... 43. Support frame; 44. Mounting hole; 5. Fixing bolt; 6. Fiber optic take-up box assembly; 7. Fiber optic take-up box top cover; 8. Fiber optic take-up box bottom cover; 9. No. 1 screw hole; 10. No. 1 pan head screw; 11. Eccentric double hole fiber optic take-up box; 12. Fixing hole; 13. No. 2 pan head screw; 44. Eccentric glue-filled core plug upper cover; 14. Eccentric glue-filled core plug lower cover; 15. Fixing screw; 16. Heat shrink tubing; 17. Injection molding; 18. Connecting groove; 19. Reference arm and delay line assembly; 10. Signal arm and hydrophone assembly. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] Implementation

[0041] Please see Figure 1 -8. An eccentric fiber optic hydrophone array, comprising: a cable body 1; an eccentric potting and plugging core assembly 2 fixedly disposed at one end of the cable body 1; a threaded adapter assembly 3 fixedly disposed on the outside of the cable body 1, the threaded adapter assembly 3 being located on one side of the eccentric potting and plugging core assembly 2; a support frame assembly 4 fixedly installed on the outside of the cable body 1, the support frame assembly 4 being located on the side of the threaded adapter assembly 3 away from the eccentric potting and plugging core assembly 2; a fiber take-up box assembly 5 fixedly installed on the outside of the cable body 1, the fiber take-up box assembly 5 being located on the side of the support frame assembly 4 away from the threaded adapter assembly 3; and a reference arm and delay line assembly 12 and a signal arm and hydrophone assembly 13 being sequentially installed from front to back inside the fiber take-up box assembly 5.

[0042] The technical solution provided in this embodiment is as follows: During installation, the eccentric glue-filled core assembly 2 is first assembled and fixed to the end of the cable body 1. Then, the outer layer is tightly wrapped with heat-shrink tubing 9, and the joint between the heat-shrink tubing 9 and the cable body 1 is sealed with hot-melt injection molding compound 10 to form a reliable double-seal structure, effectively preventing moisture infiltration. Subsequently, the threaded adapter assembly 3, the support frame assembly 4, and the fiber take-up box assembly 5 are assembled in sequence. The fiber take-up box assembly 5 has an asymmetrical eccentric layout structure, which allows for the separate disassembly and replacement of the hydrophone when it is damaged, without dismantling the entire cable system, greatly improving the convenience and cost-effectiveness of later maintenance. In terms of durability, when this device operates in a deep-sea environment, the V-ring pressure ring 22, V-ring middle ring 23, V-ring support ring 24, and V-ring pressure ring flange 25 inside the eccentric glue-filled core assembly 2 are pressed and sealed by the V-ring sealing nut 26 to prevent seawater from entering the optical fiber channel. The support skeleton assembly 4 provides stable mechanical support for the overall structure and disperses external water pressure and drag force. The fiber take-up box assembly 5 uses an eccentric double-hole structure to orderly store redundant optical fibers and avoid small-radius bending. This eccentric layout also significantly reduces stress concentration at the connection between the optical cable and each component, enhancing the structural reliability and signal transmission stability in long-term high-pressure and dynamic marine environments.

[0043] Furthermore, the eccentric glue-filled core assembly 2 includes an eccentric glue-filled core body 21 fixedly disposed outside the cable body 1. A V-ring pressure ring 22 is disposed inside the eccentric glue-filled core body 21. A V-ring middle ring 23 is disposed inside the eccentric glue-filled core body 21, with the tip of the middle ring 23 located inside the V-ring pressure ring 22. A V-ring support ring 24 is disposed inside the eccentric glue-filled core body 21, with the tip of the support ring 24 located inside the middle ring 23. A V-ring pressure ring flange 25 is disposed inside the eccentric glue-filled core body 21. A V-ring sealing nut 26 is disposed inside the eccentric glue-filled core body 21. A sealing groove 27 is formed on the outer surface of the V-ring sealing nut 26. A sealing ring 28 is movably disposed inside the sealing groove 27, with the cross-sectional diameter of the sealing ring 28 being larger than the internal size of the sealing groove 27. An optical fiber protective pad 29 is fixedly installed inside the eccentric glue-filled core body 21.

[0044] Specifically, through the V-ring multi-layer sealing structure, the V-ring sealing nut 26 will press the V-ring pressure ring 22, the V-ring middle ring 23 and the V-ring support ring 24 to generate radial sealing force, thereby achieving high sealing performance. The sealing ring 28, whose cross-sectional diameter is larger than that of the sealing groove 27, generates pre-compression when the V-ring sealing nut 26 is locked, forming the first static sealing barrier. The internal fiber optic protective pad 29 uses flexible buffer material to fix the cable body 1 while avoiding direct contact between it and metal parts, preventing stress damage and micro-bending loss, and together ensuring the absolute dryness and safety of the fiber optic channel in the deep-sea high-pressure environment.

[0045] Furthermore, the eccentric glue-filling plug body 21 is divided into an eccentric glue-filling plug upper cover 6 and an eccentric glue-filling plug lower cover 7, and the internal threads of the eccentric glue-filling plug upper cover 6 are fitted with fixing screws 8.

[0046] Specifically, by setting up an eccentric potting plug upper cover 6 and an eccentric potting plug lower cover 7, the cable body 1 can be pre-placed in the cable groove of the eccentric potting plug lower cover 7 during assembly, and then the upper cover can be closed, which greatly simplifies the process of fiber optic cable threading and arrangement. The fixing screws 8 can make the eccentric potting plug upper cover 6 and the eccentric potting plug lower cover 7 tightly connected, ensuring the uniformity of the internal potting compound and the integrity of the structure. At the same time, it also provides a convenient disassembly and assembly interface for subsequent opening, maintenance, inspection or replacement of internal components.

[0047] Furthermore, the eccentric glue-filled core assembly 2 and the cable body 1 are externally heat-shrinkable with heat-shrinkable tubing 9, and the connection between the heat-shrinkable tubing 9 and the cable body 1 is heat-sealed with injection molding compound 10.

[0048] Specifically, the heat shrink tubing 9 uses a double-walled adhesive-containing heat shrink material. After heating and shrinking, its inner wall molten adhesive layer tightly adheres to the outer surface of the cable body 1 and the eccentric glue-filled core assembly 2, forming a continuous, smooth, and elastic first protective sleeve. At the joint positions at both ends, epoxy resin-based injection molding 10 is injected through a special mold to form a raised injection molding end cap. This end cap not only blocks the axial water seepage path, but its overlapping area with the heat shrink tubing 9 also constitutes a mechanical locking structure, significantly enhancing the tensile and torsional resistance of the joint, making it suitable for the dragging and long-term ocean current impact environment during submarine cable laying.

[0049] Furthermore, the threaded adapter assembly 3 includes a threaded adapter upper cover 31 and a threaded adapter lower cover 32 that are sleeved on the outside of the cable body 1. The outer surface of the threaded adapter lower cover 32 is provided with a threaded connection hole 33, and a connecting screw 34 is installed in the internal thread of the threaded connection hole 33.

[0050] Specifically, the upper cover 31 and the lower cover 32 of the threaded adapter are mated to form a complete adapter housing, the inner cavity of which matches the outer shape of the cable body 1; the threaded connection holes 33 are arranged in a rectangular array along the lower cover, and after the connecting screw 34 is screwed in, its end directly locks the corresponding threaded hole of the upper cover 31 of the threaded adapter, generating a strong normal locking force to ensure that the upper and lower covers will not separate under high pressure. The two ends of this component are usually designed with standard interface threads or quick-connect structures to achieve a fast and reliable connection between this hydrophone unit and adjacent units, repeaters or shore-based equipment.

[0051] Furthermore, the support frame assembly 4 includes an upper support frame 41 and a lower support frame 42 that are sleeved on the outside of the cable body 1. The outer surface of the lower support frame 42 is fixedly installed with a mounting hole 43, and a fixing bolt 44 is installed in the internal thread of the mounting hole 43. One end of the fixing bolt 44 passes through the mounting hole 43 and is threadedly connected to the upper support frame 41.

[0052] Specifically, the upper support frame 41 and the lower support frame 42 are usually made of high-strength corrosion-resistant alloys such as stainless steel or titanium alloy. Their cross-section is designed as a frame structure with ribs, which reduces weight while ensuring sufficient section modulus to resist bending. The fixing bolts 44 pass through the mounting holes 43 of the lower support frame 42 and lock with the upper frame, firmly clamping the entire support frame onto the cable body 1. As the main load-bearing structure, this component can evenly transfer the loads such as the external hydrophone housing and water flow impact force to the cable body and limit the relative displacement between the components, effectively preventing the optical fiber from being excessively stretched or squeezed due to structural deformation.

[0053] Furthermore, the fiber optic cable assembly 5 includes a fiber optic cable top cover 51 and a fiber optic cable bottom cover 52 that are sleeved on the outside of the cable body 1. A first screw hole 53 is opened on the outer surface of the fiber optic cable bottom cover 52. A first pan head screw 54 is installed in the internal thread of the first screw hole 53. An eccentric double-hole fiber optic cable 55 is fixedly installed on the top of the fiber optic cable bottom cover 52 by the first pan head screw 54. Fixing holes 56 are opened on the top and bottom surfaces of the eccentric double-hole fiber optic cable 55. A second screw hole 57 is opened on the outer surface of the fiber optic cable top cover 51. A second pan head screw 58 is installed in the internal thread of the second screw hole 57.

[0054] Specifically, the bottom cover 52 of the fiber take-up box is fixedly installed with the eccentric double-hole fiber take-up box 55 by the No. 1 pan head screw 54. The center lines of the two fiber receiving holes inside the fiber take-up box assembly 5 are arranged eccentrically parallel to the axis of the cable body 1. This design provides a natural and gentle bending path for the redundant optical fibers drawn from the cable, ensuring that the bending radius of the optical fiber is much greater than its minimum allowable value. The top cover 51 of the fiber take-up box is closed with the bottom cover by the No. 2 pan head screw 58 to form a sealed cavity, protecting the internally coiled optical fiber from mechanical damage and seawater erosion. The fiber take-up box 55 has a hydrophone and a delay line arranged opposite each other inside. Compared with a single hydrophone, the advantage is that the delay line can be flexibly adjusted according to the requirements, and the parameters such as the length of the delayed line wound with optical fiber can be adjusted. The parameters of the hydrophone are determined, and materials can be prepared in advance, shortening the project time and saving costs.

[0055] Furthermore, the outer surface of the eccentric potting plug body 21 is provided with a connecting groove 11, and there are multiple connecting grooves 11.

[0056] Specifically, multiple connecting grooves 11 are formed on the outer surface of the eccentric glue-filled plug body 21. Their cross-sections can be designed as T-shaped, dovetail-shaped, or keyway-shaped. These grooves are mainly used to match and install anti-rotation pins, positioning keys, or external armored steel wires as fixed terminals, so as to achieve reliable mechanical interlocking with external protective sleeves, underwater bases, or other installation platforms, prevent the entire plug assembly from circumferentially rotating or axially moving during use, and improve the structural rigidity and environmental adaptability of the entire end connection.

[0057] Furthermore, the tip of the connecting screw 34 passes through the threaded connecting hole 33 and is threadedly connected to the threaded adapter cover 31.

[0058] Specifically, the thread length of the connecting screw 34 is precisely calculated to ensure that when it is fully screwed into the threaded connection hole 33 and finally engages with the internal thread of the threaded adapter cover 31, the shank of the connecting screw 34 can withstand sufficient preload without stripping. This through-type threaded connection forms a robust mechanical interlock, making the threaded adapter cover 31 and the threaded adapter cover 32 a whole, capable of withstanding the high pressure of deep sea and the huge stress generated by installation and tightening, ensuring the long-term sealing and stability of the connection interface.

[0059] Furthermore, the tip of the No. 2 pan head screw 58 passes through the No. 2 screw hole 57 and is threaded into the bottom cover 52 of the fiber collection box.

[0060] Specifically, the threaded shank of the No. 2 pan head screw 58 passes through the No. 2 screw hole 57 of the fiber optic take-up box top cover 51 and is finally screwed into the corresponding threaded blind hole of the fiber optic take-up box bottom cover 52. The pan head design of the screw facilitates tightening with tools and provides a large clamping area, ensuring that the top cover is evenly stressed and closes smoothly. By evenly arranging multiple No. 2 pan head screws 58, the pressure distribution on the sealing surfaces of the fiber optic take-up box top cover 51 and bottom cover 52 can be uniform, effectively preventing local leakage, ensuring a dry internal environment, and protecting the fragile optical fiber.

[0061] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An eccentric fiber optic hydrophone array, characterized in that, include: Cable body (1); An eccentric glue-filled core assembly (2) is fixedly provided at one end of the cable body (1); A threaded adapter assembly (3) is fixedly installed on the outside of the cable body (1), and the threaded adapter assembly (3) is located on one side of the eccentric potting and plugging core assembly (2). The cable body (1) is fixedly installed with a support frame assembly (4), which is located on the side of the threaded adapter assembly (3) away from the eccentric potting plug assembly (2). The cable body (1) is fixedly installed with a fiber take-up box assembly (5), which is located on the side of the support frame assembly (4) away from the threaded adapter assembly (3). The fiber take-up box assembly (5) is equipped with a reference arm and delay line assembly (12) and a signal arm and hydrophone assembly (13) in sequence from front to back.

2. The eccentric fiber optic hydrophone array according to claim 1, characterized in that: The eccentric glue-filling core assembly (2) includes an eccentric glue-filling core body (21) fixedly disposed outside the cable body (1). A V-shaped ring pressure ring (22) is disposed inside the eccentric glue-filling core body (21). A V-shaped ring inner ring (23) is disposed inside the eccentric glue-filling core body (21), with the tip of the V-shaped ring inner ring (23) located inside the V-shaped ring pressure ring (22). A V-shaped ring support ring (24) is disposed inside the eccentric glue-filling core body (21), with the tip of the V-shaped ring support ring (24) located inside the V-shaped ring inner ring. Inside (23), a V-ring pressure ring flange (25) is provided inside the eccentric glue-filling core body (21), a V-ring sealing nut (26) is provided inside the eccentric glue-filling core body (21), a sealing groove (27) is provided on the outer surface of the V-ring sealing nut (26), a sealing ring (28) is movably provided inside the sealing groove (27), the cross-sectional diameter of the sealing ring (28) is larger than the internal size of the sealing groove (27), and an optical fiber protective pad (29) is fixedly installed inside the eccentric glue-filling core body (21).

3. The eccentric fiber optic hydrophone array according to claim 2, characterized in that: The eccentric glue-filling plug body (21) is divided into an eccentric glue-filling plug upper cover (6) and an eccentric glue-filling plug lower cover (7). The internal threads of the eccentric glue-filling plug upper cover (6) are fitted with fixing screws (8).

4. The eccentric fiber optic hydrophone array according to claim 1, characterized in that: The eccentric glue-filling core assembly (2) and the cable body (1) are provided with heat-shrinkable tubes (9) on the outside, and the connection between the heat-shrinkable tube (9) and the cable body (1) is sealed with injection molding glue (10) by heat fusion.

5. The eccentric fiber optic hydrophone array according to claim 1, characterized in that: The threaded adapter assembly (3) includes a threaded adapter upper cover (31) and a threaded adapter lower cover (32) sleeved on the outside of the cable body (1). The outer surface of the threaded adapter lower cover (32) is provided with a threaded connection hole (33), and a connecting screw (34) is installed in the internal thread of the threaded connection hole (33).

6. The eccentric fiber optic hydrophone array according to claim 1, characterized in that: The support frame assembly (4) includes an upper support frame (41) and a lower support frame (42) sleeved on the outside of the cable body (1). The outer surface of the lower support frame (42) is fixedly installed with a mounting hole (43). A fixing bolt (44) is installed in the internal thread of the mounting hole (43). One end of the fixing bolt (44) passes through the mounting hole (43) and is threadedly connected to the upper support frame (41).

7. The eccentric fiber optic hydrophone array according to claim 1, characterized in that: The fiber take-up box assembly (5) includes a fiber take-up box top cover (51) and a fiber take-up box bottom cover (52) sleeved on the outside of the cable body (1). The outer surface of the fiber take-up box bottom cover (52) has a first screw hole (53). The internal thread of the first screw hole (53) is fitted with a first pan head screw (54). An eccentric double hole fiber take-up box (55) is fixedly installed on the top of the fiber take-up box bottom cover (52) by the first pan head screw (54). The top and bottom surfaces of the eccentric double hole fiber take-up box (55) have fixing holes (56). The outer surface of the fiber take-up box top cover (51) has a second screw hole (57). The internal thread of the second screw hole (57) is fitted with a second pan head screw (58).

8. The eccentric fiber optic hydrophone array according to claim 2, characterized in that: The outer surface of the eccentric glue-filling core body (21) is provided with a connecting groove (11), and there are multiple connecting grooves (11).

9. The eccentric fiber optic hydrophone array according to claim 5, characterized in that: The tip of the connecting screw (34) passes through the threaded connecting hole (33) and is threadedly connected to the threaded adapter cover (31).

10. An eccentric fiber optic hydrophone array according to claim 7, characterized in that: The tip of the No. 2 pan head screw (58) passes through the No. 2 screw hole (57) and is threaded to the bottom cover (52) of the fiber collection box.

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