Optical fiber hydrophone array connector structure and optical fiber hydrophone array

Abstract

The invention belongs to the technical field of light sensing detection system, and discloses a fiber optic hydrophone array joint structure and a fiber optic hydrophone array. The joint structure comprises a wedge block assembly, a fiber optic joint assembly, an inner sheath assembly and an outer anti-bending assembly. The inner wedge block in the wedge block assembly can press the load-bearing metal wire of the optical cable onto the inner wall of the outer wedge block. The fiber optic joint assembly is sleeved on the wedge-mounted end of the outer wedge block and can allow the optical fiber unit to extend. One end of the inner sheath assembly is buckled on the end of the outer wedge block away from the wedge-mounted end, and the other end is sealed and connected to the protective surface layer of the optical cable. One end of the half bend-resistant sleeve of the outer anti-bending assembly is sleeved on the outer side of the fiber optic joint assembly, and the other end is connected to the rubber anti-bending sleeve. The half bend-resistant sleeve comprises at least two half sleeve units, and the inner buckle block part of one half sleeve unit is buckled on the outer buckle groove part of another half sleeve unit at an adjustable angle, so that the phenomenon of easy damage due to large mechanical load can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of light sensing detection systems, and in particular relates to a fiber optic hydrophone array joint structure and a fiber optic hydrophone array. Background Art

[0002] Fiber optic hydrophones and their arrays have become the development direction of the underwater part of passive sonar, and are the most promising equipment for ocean detection and monitoring of weak sound field signals. In the fiber optic hydrophone array structure, when the unit scale is large, the array is composed of multiple sub-arrays, and the sub-arrays need to be connected by joints. At present, the common fiber optic hydrophone array uses a vulcanized sealed joint structure to connect different sub-arrays. When subjected to large mechanical loads, especially large bending loads, the vulcanized seal is easily damaged, resulting in seal failure. Summary of the invention

[0003] In view of the above defects or shortcomings, the present invention provides a fiber optic hydrophone array joint structure and a fiber optic hydrophone array, aiming to solve the technical problem that the vulcanized sealed joint structure in the fiber optic hydrophone array is prone to damage.

[0004] To achieve the above-mentioned purpose, the first aspect of the present invention provides a fiber optic hydrophone array joint structure, wherein the fiber optic hydrophone array joint structure includes a wedge block assembly, a fiber optic joint assembly, an inner sheath assembly and an outer bending-resistant assembly; the wedge block assembly includes an outer wedge block and an inner wedge block that can be wedged into the inner cavity of the outer wedge block from the wedge-mounted end of the outer wedge block, the outer wall of the inner wedge block is used to press the load-bearing metal wire of the optical cable against the inner wall of the outer wedge block, and the inner cavity of the inner wedge block can allow the optical fiber unit of the optical cable to pass through; the fiber optic joint assembly is sleeved on the wedge-mounted end of the outer wedge block and allows the optical fiber unit to extend; the inner sheath assembly is sleeved on the outer side of the optical cable, and the inner sheath assembly is sleeved on the outer side of the optical cable. One end of the sleeve assembly is buckled on the end of the outer wedge block away from the wedge-mounted end, and the other end is sealed and connected to the protective surface of the optical cable; the outer anti-bending assembly is sleeved on the outside of the inner sheath assembly and includes a Huff anti-bending sleeve and a rubber anti-bending sleeve, one end of the Huff anti-bending sleeve is sleeved on the outside of the optical fiber connector assembly, and the other end is connected to the rubber anti-bending sleeve, the Huff anti-bending sleeve includes at least two Huff sleeve units that are buckled and connected in sequence, and the two ends of the Huff sleeve unit are respectively provided with an inner buckle block part and an outer buckle groove part, and the inner buckle block part of one of the two adjacent Huff sleeve units is buckled on the outer buckle groove part of the other Huff sleeve unit with an adjustable angle.

[0005] In one embodiment of the present invention, the Hough casing unit includes a first diameter section, a reducing section and a second diameter section connected in sequence along the length direction, the diameter size of the first diameter section is smaller than the diameter size of the second diameter section, the end of the first diameter section away from the reducing section protrudes outwardly and is provided with an external buckle block portion, so that the external buckle block portion and the reducing section are combined to form an external buckle groove portion, the end of the second diameter section away from the reducing section protrudes inwardly and is provided with an internal buckle block portion, and the internal buckle block portion and the reducing section are combined to form an internal buckle groove portion for buckling the external buckle block portion.

[0006] In one embodiment of the present invention, the Hough anti-bending sleeve also includes an end fixing sleeve, a first end of the end fixing sleeve is formed with a first internal thread section threadedly connected to the optical fiber connector assembly, and a second end of the end fixing sleeve is formed with an external buckle groove for buckling and connecting the internal buckle block of the Hough sleeve unit.

[0007] In one embodiment of the present invention, a first limiting step is formed on the inner wall of the end fixing sleeve, and the first limiting step can abut against an end of the optical fiber connector assembly disposed toward the inner sheath assembly.

[0008] In one embodiment of the present invention, the end fixing sleeve includes a first buckled pipe section and a connecting pipe section, the first end of the connecting pipe section forms a first internal thread section, the second end of the connecting pipe section is reduced in diameter inward to form a first limiting step and a second limiting step on the inner wall and the outer wall respectively corresponding to each other, and the second end of the connecting pipe section is formed with a first external thread section, one end of the first buckled pipe section is threadedly connected to the first external thread section and can abut against the second limiting step, and the other end is formed with an external buckle groove.

[0009] In one embodiment of the present invention, the rubber anti-bending sleeve includes a rubber tube body and a second buckled tube section, the second buckled tube section is configured to be able to be assembled along the circumferential direction, and the first end of the second buckled tube section is formed with an inner buckle block portion, and the second end is configured to be reduced in diameter inward to form a third limiting step on the outer wall, and one end of the rubber tube body is injection-molded with an injection molded part formed with a second internal threaded section, and the injection molded part is threadedly connected to the second end of the second buckled tube section through the second internal threaded section.

[0010] In one embodiment of the present invention, the outer wedge block includes a wedge block body, a soft sleeve and a clamping piece. The inner cavity of the wedge block body includes a clamping space, a accommodating space and a wedge-mounted space which are arranged in sequence. The inner wedge block can be wedged into the wedge-mounted space. The soft sleeve can be placed in the accommodating space and can allow an optical cable with a protective surface layer to pass through. The clamping piece can allow the optical cable to pass through and can be screwed and installed in the clamping space to compress the soft sleeve against the protective surface layer of the optical cable.

[0011] In one embodiment of the present invention, an optical fiber connector assembly includes a connector body and an optical fiber connector. The connector body is mounted on the circumferential side of the wedge-mounted end and is surrounded by the end face of the wedge-mounted end to form a packaging space. A first sealing ring is provided between the connector body and the circumferential side of the wedge-mounted end, and the connector body is also provided with a third internal thread section on the side of the first sealing ring close to the end face of the wedge-mounted end, the third internal thread section is threadedly connected to the circumferential side of the wedge-mounted end, and the connector body is also provided with a locking screw on the side of the end of the first sealing ring away from the wedge-mounted end, the locking screw can be screwed into the circumferential side of the wedge-mounted end, a packaging port is formed at the end face of the connector body facing the wedge-mounted end, the optical fiber connector can be screwed and installed at the packaging port, and a second sealing ring is provided between the optical fiber connector and the inner wall of the packaging port, and the optical fiber connector has a groove for the optical fiber unit to extend out.

[0012] In one embodiment of the present invention, the inner sheath assembly includes a sheath body, a skeleton layer, a tail plug core, a vulcanized connecting layer and a heat shrinkable tube. The sheath body and the tail plug core are sequentially sleeved on the outside of the optical cable from the wedge block. One end of the sheath body is buckled to the end of the outer wedge block away from the wedge-mounted end through a first buckling ring, and the other end is buckled to one end of the tail plug core through a second buckling ring. The skeleton layer can be filled between the sheath body and the optical cable, and the end of the tail plug core away from the sheath body is sealed and connected to the optical cable through the vulcanized connecting layer, and the heat shrinkable tube is sequentially sleeved on the optical cable, the vulcanized connecting layer and the tail plug core, and abuts against the end of the sheath body.

[0013] In one embodiment of the present invention, the skeleton layer includes a supporting skeleton body and a gel filling body, and the supporting skeleton body and the gel filling body are alternately arranged in sequence between the jacket body and the optical cable along the extension direction of the optical cable.

[0014] In one embodiment of the present invention, the tail plug core includes a vulcanization sealing section and a casing sealing section which are arranged in sequence, the diameter of the vulcanization sealing section is smaller than the diameter of the casing sealing section, the vulcanization connecting layer extends from the end face of the vulcanization sealing section to the peripheral side of the vulcanization sealing section, the heat shrinkable sleeve and the sleeve body both extend to be sleeved on the casing sealing section, and the casing sealing section is provided with a groove for the colloid forming the vulcanization connecting layer to enter.

[0015] To achieve the above-mentioned purpose, the second aspect of the present invention provides a fiber optic hydrophone array, wherein the fiber optic hydrophone array includes a subarray, a junction box, and the fiber optic hydrophone array connector structure described above, the end of the optical cable of each subarray is provided with a connector structure, and the two ends of the junction box are respectively and one-to-one correspondingly mounted on the outside of the optical fiber connector assembly of the two connector structures, so that the optical fiber units extending from the two connector structures can be fused in the box cavity of the junction box.

[0016] Through the above technical solution, the optical fiber hydrophone array joint structure provided by the present invention has the following beneficial effects:

[0017] When the above-mentioned fiber optic hydrophone array joint structure is used, since it includes a wedge block assembly, an optical fiber joint assembly, an inner sheath assembly and an outer anti-bending assembly, the outer wall of the inner wedge block in the wedge block assembly can press the load-bearing metal wire of the optical cable against the inner wall of the outer wedge block, so that the optical cable can be reliably connected to the wedge block assembly, and the optical fiber joint assembly is sleeved on the wedge-mounted end of the outer wedge block, so that the optical fiber joint assembly can effectively protect the wedge-mounted end of the outer wedge block, one end of the inner sheath assembly is buckled on the end of the outer wedge block away from the wedge-mounted end, and the other end is sealed and connected to the protective surface layer of the optical cable, so that the end of the outer wedge block away from the wedge-mounted end and the optical cable can be sealed and protected by the inner sheath assembly, the outer anti-bending assembly is sleeved on the outside of the inner sheath assembly, that is, the outer anti-bending assembly can protect the inner sheath assembly and the structure inside the inner sheath assembly, and one end of the Huff anti-bending sleeve is sleeved on the optical fiber joint assembly The outer side of the component is connected with the other end of the component, and the other end is connected with the rubber anti-bending sleeve. The Huff anti-bending sleeve includes at least two Huff sleeve units that are sequentially buckled and connected. The inner buckle block portion of one of the two adjacent Huff sleeve units is buckled on the outer buckle groove portion of the other Huff sleeve unit at an adjustable angle. Therefore, when the Huff anti-bending sleeve is subjected to high-intensity mechanical loads, especially bending loads, it can achieve bending deformation by changing the buckling angle between the two Huff sleeve units without causing damage. The rubber anti-bending sleeve is connected to the Huff anti-bending sleeve, which not only ensures the stability of the buckling connection of the Huff anti-bending sleeve, but also the deformation performance of the rubber anti-bending sleeve itself is also very excellent, thereby making the entire joint structure have better tensile strength, sealing performance and bending resistance, which can avoid the phenomenon of easy damage due to large mechanical loads, and is suitable for use under harsh working conditions.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0020] Figure 1 is a schematic cross-sectional structural diagram of a fiber optic hydrophone array connector structure according to an embodiment of the present invention;

[0021] Figure 2 is a structural schematic diagram of a fiber optic hydrophone array connector structure according to an embodiment of the present invention;

[0022] Figure 3 is a schematic structural diagram of a Hough casing unit according to an embodiment of the present invention;

[0023] Figure 4 is a schematic structural diagram of a wedge block assembly, an optical fiber connector assembly and an end fixing sleeve according to an embodiment of the present invention;

[0024] Figure 5 is a structural schematic diagram of a connecting pipe section according to an embodiment of the present invention;

[0025] Figure 6 is a schematic structural diagram of a rubber anti-bending sleeve according to an embodiment of the present invention;

[0026] Figure 7 is a schematic structural diagram of a tail plugging core according to an embodiment of the present invention;

[0027] Figure 8 It is a structural schematic diagram of two joint structures connected through a junction box according to an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 100, wedge block assembly; 110, outer wedge block; 111, wedge block body; 112, soft kit; 113, pressing piece; 114, pressing space; 115, accommodating space; 116, wedge installation space; 120, inner wedge block; 200, optical fiber connector assembly; 210, connector body; 211, packaging space; 212, first sealing ring; 213, set screw; 220, optical fiber connector; 221, second sealing ring; 300, inner sheath assembly; 310, sheath body; 311, first buckle ring; 312, second buckle ring; 320, tail plug; 321, vulcanized sealing section; 322, casing sealing section; 323, groove; 330, vulcanized connection layer; 340, heat Shrink sleeve; 350, support frame body; 360, gel filling body; 400, external bending resistance component; 410, half sleeve unit; 411, first diameter section; 412, reducing section; 413, second diameter section; 414, external buckle block; 415, external buckle groove; 416, internal buckle block; 417, internal buckle groove; 420, end fixing sleeve; 421, first buckle pipe section; 422, connecting pipe section; 423, first limiting step; 424, second limiting step; 430, end pipe section; 440, rubber bending resistance sleeve; 441, rubber tube body; 442, second buckle pipe section; 443, third limiting step; 444, injection molded part; 500, junction box; 600, optical cable. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0031] The fiber optic hydrophone array connector structure and the fiber optic hydrophone array of the present invention will be described below with reference to the accompanying drawings.

[0032] like Figure 1 and Figure 2 As shown, the present invention provides a fiber optic hydrophone array joint structure, wherein the fiber optic hydrophone array joint structure comprises:

[0033] The wedge block assembly 100 includes an outer wedge block 110 and an inner wedge block 120 which can be wedged into the inner cavity of the outer wedge block 110 from the wedge-mounted end of the outer wedge block 110. The outer wall of the inner wedge block 120 is used to press the load-bearing wire of the optical cable 600 against the inner wall of the outer wedge block 110. The inner cavity of the inner wedge block 120 can allow the optical fiber unit of the optical cable 600 to pass through.

[0034] The optical fiber connector assembly 200 is mounted on the wedge-mounted end of the outer wedge block 110 and allows the optical fiber unit to extend;

[0035] The inner sheath component 300 is sleeved on the outer side of the optical cable 600, one end of the inner sheath component 300 is buckled on the end of the outer wedge block 110 away from the wedge-mounted end, and the other end is sealed and connected to the protective surface layer of the optical cable 600;

[0036] The outer anti-bending component 400 is sleeved on the outer side of the inner sheath component 300 and includes a Huff anti-bending sleeve and a rubber anti-bending sleeve 440. One end of the Huff anti-bending sleeve is sleeved on the outer side of the optical fiber connector component 200, and the other end is connected to the rubber anti-bending sleeve 440. The Huff anti-bending sleeve includes at least two Huff sleeve units 410 that are snap-fitted in sequence. The two ends of the Huff sleeve unit 410 are respectively provided with an inner snap block portion 416 and an outer snap groove portion 415. The inner snap block portion 416 of one of the two adjacent Huff sleeve units 410 is snap-fitted on the outer snap groove portion 415 of the other Huff sleeve unit 410 in an angle-adjustable manner.

[0037] When the above-mentioned fiber optic hydrophone array joint structure is used, since it includes the wedge block assembly 100, the fiber optic joint assembly 200, the inner sheath assembly 300 and the outer bending resistance assembly 400, the outer wall of the inner wedge block 120 in the wedge block assembly 100 can press the load-bearing metal wire of the optical cable 600 against the inner wall of the outer wedge block 110, so that the optical cable 600 can be reliably connected to the wedge block assembly 100, and the fiber optic joint assembly 200 is sleeved on the wedge-mounted end of the outer wedge block 110, so that the fiber optic joint assembly 200 The wedge-mounted end of the outer wedge block 110 can be effectively protected. One end of the inner sheath component 300 is buckled on the end of the outer wedge block 110 away from the wedge-mounted end, and the other end is sealed and connected to the protective surface of the optical cable 600, so that the inner sheath component 300 can be used to seal and protect the end of the outer wedge block 110 away from the wedge-mounted end and the optical cable 600. The outer bending component 400 is sleeved on the outside of the inner sheath component 300, that is, the outer bending component 400 can protect the inner sheath component 300 and the inner sheath component 300. The structure of the Huff anti-bending sleeve is that one end of the Huff anti-bending sleeve is sleeved on the outside of the optical fiber connector assembly 200, and the other end is connected to the rubber anti-bending sleeve 440. The Huff anti-bending sleeve includes at least two Huff sleeve units 410 that are buckled and connected in sequence. The inner buckle block portion 416 of one of the two adjacent Huff sleeve units 410 is buckled and buckled on the outer buckle groove portion 415 of the other Huff sleeve unit 410 in an adjustable angle. When the Huff anti-bending sleeve is subjected to high-intensity mechanical loads, especially bending loads, it can achieve bending deformation by changing the buckling angle between the two Huff sleeve units 410 without causing damage. The rubber anti-bending sleeve 440 is connected to the Huff anti-bending sleeve, which not only ensures the stability of the buckling connection of the Huff anti-bending sleeve, but also has excellent deformation performance of the rubber anti-bending sleeve 440 itself, thereby making the entire joint structure have better tensile strength, sealing performance and bending resistance, which can avoid the phenomenon of easy damage due to large mechanical loads, and is suitable for use under harsh working conditions.

[0038] Specifically, the skin of the optical cable 600 can be peeled off first to expose the load-bearing metal wires of the optical cable 600 and separate from the optical fiber unit, and then the peeled optical cable 600 is passed through the outer wedge block 110, and the load-bearing metal wires of the optical cable 600 are guided one by one into the grooves on the outer wall of the inner wedge block 120, while the optical fiber unit of the optical cable 600 continues to pass through the inner wedge block 120, and then the inner wedge block 120 is pushed from the wedge-mounted end of the outer wedge block 110 into the inner cavity of the outer wedge block 110, so that the inner wedge block 120 presses the load-bearing metal wires of the optical cable 600 against the inner wall of the outer wedge block 110 while being wedged and installed on the outer wedge block 110. It should be particularly noted that the load-bearing metal wire can have an end surface that partially extends out of the wedge-mounted end of the outer wedge block 110, and after bending, it is bonded to the inner wedge block 120 and / or the outer wedge block 110 through an adhesive (for example: epoxy resin glue). In addition, the load-bearing metal wire of the optical cable 600 can specifically be an outer layer of load-bearing steel wire.

[0039] It can be understood that the half sleeve unit 410 can be configured to be split in half along the circumferential direction, so that when installing, it can be first fastened on another half sleeve unit 410 and then split and connected.

[0040] See also Figures 1 to 3 In one embodiment of the present invention, the Hough casing unit 410 includes a first diameter section 411, a reducing section 412 and a second diameter section 413 connected in sequence along the length direction. The diameter size of the first diameter section 411 is smaller than the diameter size of the second diameter section 413. The end of the first diameter section 411 away from the reducing section 412 protrudes outwardly and is provided with an external buckle block portion 414, so that the external buckle block portion 414 and the reducing section 412 are combined to form an external buckle groove portion 415. The end of the second diameter section 413 away from the reducing section 412 protrudes inwardly and is provided with an internal buckle block portion 416. The internal buckle block portion 416 and the reducing section 412 are combined to form an internal buckle groove portion 417 for buckling the external buckle block portion 414. That is, the half sleeve unit 410 is designed with a variable diameter to form a first diameter section 411 and a second diameter section 413 with different diameters, and an outer buckle block 414 is designed to protrude outward on the first diameter section 411 with a smaller diameter, and an inner buckle block 416 is designed to protrude inward on the second diameter section 413 with a larger diameter, and an outer buckle groove 415 and an inner buckle groove 417 are constructed at the same time, without the need to open additional notches, and the structure is simple, easy to produce and install. Specifically, the outer buckle block 414 is arranged around the entire annular direction of the first diameter section 411, and the inner buckle block 416 is arranged around the entire annular direction of the second diameter section 413.

[0041] See also Figures 1 to 5In one embodiment of the present invention, the Hough anti-bending sleeve further includes an end fixing sleeve 420, the first end of which is formed with a first internal thread section threadedly connected to the optical fiber connector assembly 200, and the second end of the end fixing sleeve 420 is formed with an external buckle groove 415 for buckling connection with the internal buckle block 416 of the Hough sleeve unit 410. By adding the end fixing sleeve 420, it is convenient to realize the sleeve connection of the Hough anti-bending sleeve on the optical fiber connector assembly 200, and it can also realize the buckling connection with the Hough sleeve unit 410 located at the end. Specifically, the connector body 210 of the optical fiber connector assembly 200 is provided with a second external thread section threadedly connected to the first internal thread section.

[0042] In one embodiment of the present invention, the inner wall of the end fixing sleeve 420 is formed with a first limiting step 423, and the first limiting step 423 can abut against one end of the optical fiber connector assembly 200 disposed toward the inner sheath assembly 300. That is, by adding the first limiting step 423, the installation of the end fixing sleeve 420 can be end-positioned to ensure that it is installed in place. Specifically, the first limiting step 423 can abut against one end of the connector body 210 in the optical fiber connector assembly 200 disposed toward the inner sheath assembly 300.

[0043] In one embodiment of the present invention, the end fixing sleeve 420 includes a first buckle-mounted pipe section 421 and a connecting pipe section 422, the first end of the connecting pipe section 422 forms a first internal thread section, the second end of the connecting pipe section 422 is reduced in diameter inwardly to form a first limiting step 423 and a second limiting step 424 on the inner wall and the outer wall respectively, and the second end of the connecting pipe section 422 is formed with a first external thread section, one end of the first buckle-mounted pipe section 421 is threadedly connected with the first external thread section and can abut against the second limiting step 424, and the other end is formed with an external buckle groove 415. Since the end fixing sleeve 420 needs to be formed with three structures of the first internal thread section, the first limiting step 423 and the external buckle groove 415, by splitting the end fixing sleeve 420 into the first buckle-mounted pipe section 421 and the connecting pipe section 422, it can be convenient to achieve the purpose of facilitating production and manufacturing. In addition, the setting of the second limiting step 424 facilitates the positioning of the installation of the first buckled pipe section 421, and the setting of the first external threaded section on the first buckled pipe section 421 enables the two ends of the connecting pipe section 422 to form two different internal and external threaded connection structures, thereby improving the connection stability of the connecting pipe section 422.

[0044] Furthermore, the end fixing sleeve 420 also includes an end pipe section 430, and a fourth internal thread section is provided on the inner wall of the end pipe section 430. The end pipe section 430 can be threadedly connected to the optical fiber connector assembly 200 through the fourth internal thread section and abut against the end of the connecting pipe section 422 away from the first buckled pipe section 421, that is, the end pipe section 430 is located at the end of the entire end fixing sleeve 420, and cooperates with the first limiting step 423 on the connecting pipe section 422 to realize bidirectional positioning of the connecting pipe section 422.

[0045] See also Figure 1 , Figure 2 and Figure 6 In one embodiment of the present invention, the rubber bending-resistant sleeve 440 includes a rubber tube body 441 and a second buckle-mounted tube section 442, the second buckle-mounted tube section 442 is configured to be assembled along the circumferential direction, and the first end of the second buckle-mounted tube section 442 is formed with an inner buckle block 416, and the second end is configured to be inwardly variable in diameter to form a third limiting step 443 on the outer wall, that is, the second buckle-mounted tube section 442 is similar to the structure of the half sleeve unit 410. In order to realize the buckling of the inner buckle block 416 of the second buckle-mounted tube section 442 on the half sleeve unit 410, it is necessary to be configured to be assembled along the circumferential direction. The formation of the third limiting step 443 facilitates the positioning of the subsequent installation of the injection molded part 444. At the same time, one end of the rubber tube body 441 is injection-molded with an injection molded part 444 formed with a second internal threaded section, and the injection molded part 444 is threadedly connected to the second end of the second buckle-mounted tube section 442 through the second internal threaded section. That is, the addition of the injection molded part 444 facilitates the connection between the rubber tube body 441 and the second buckled tube section 442 .

[0046] See also Figure 1 and Figure 4 In one embodiment of the present invention, the outer wedge block 110 includes a wedge block body 111, a soft cover 112 and a pressing member 113. The inner cavity of the wedge block body 111 includes a pressing space 114, a receiving space 115 and a wedge-mounted space 116 arranged in sequence. The inner wedge block 120 can be wedged into the wedge-mounted space 116. The soft cover 112 can be placed in the receiving space 115 and can allow the optical cable 600 with a protective surface layer to pass through. The pressing member 113 can allow the optical cable 600 to pass through and can be screwed and installed in the pressing space 114 to compress the soft cover 112 against the protective surface layer of the optical cable 600. By adding the soft cover 112 and the pressing member 113, the connection between the optical cable 600 and the wedge block assembly 100 can be further strengthened. Specifically, the protective surface layer of the optical cable 600 can be peeled off between the receiving space 115 and the wedge-mounted space 116 to expose the load-bearing metal wire. Meanwhile, a threaded structure is provided between the pressing member 113 and the inner wall of the pressing space 114 , so that the pressing member 113 can be screwed in the pressing space 114 .

[0047] In one embodiment of the present invention, the optical fiber connector assembly 200 includes a connector body 210 and an optical fiber connector 220. The connector body 210 is mounted on the peripheral side of the wedge-mounted end and is surrounded by the end face of the wedge-mounted end to form a packaging space 211. The packaging space 211 can be used for bonding and fixing the load-bearing metal wire of the optical cable 600. A first sealing ring 212 is provided between the connector body 210 and the peripheral side of the wedge-mounted end. The addition of the first sealing ring 212 can seal the packaging space 211. The connector body 210 is also provided with a third internal thread section on the side of the first sealing ring 212 close to the end face of the wedge-mounted end. The third internal thread section is threadedly connected to the peripheral side of the wedge-mounted end. The connector body 210 is also provided with a locking screw 213 on the side of the end of the first sealing ring 212 away from the wedge-mounted end. The locking screw 213 can be screwed into the peripheral side of the wedge-mounted end. The addition of the locking screw 213 can further improve the connection stability between the connector body 210 and the outer wedge block 110. In addition, a packaging port is formed at the end surface of the connector body 210 facing the wedge-mounted end, and the optical fiber connector 220 can be screwed and installed at the packaging port. Specifically, a threaded structure is provided between the optical fiber connector 220 and the inner wall of the packaging port, so that the optical fiber connector 220 can be screwed at the packaging port, and a second sealing ring 221 is provided between the optical fiber connector 220 and the inner wall of the packaging port. The addition of the second sealing ring 221 can seal the packaging space 211, and the optical fiber connector 220 has a groove for the optical fiber unit to extend. More specifically, the number of the first sealing ring 212 and the second sealing ring 221 can be multiple and include but are not limited to O-type sealing rings.

[0048] See also Figure 1In one embodiment of the present invention, the inner sheath assembly 300 includes a sheath body 310, a skeleton layer, a tail plug core 320, a vulcanized connection layer 330 and a heat shrink tube 340. The sheath body 310 and the tail plug core 320 are sequentially sleeved on the outside of the optical cable 600 from the outer wedge block 110. One end of the sheath body 310 is pressed on the end of the outer wedge block 110 away from the wedge-mounted end through a first buckling ring 311, and the other end is buckled on one end of the tail plug core 320 through a second buckling ring 312. The addition of the first buckling ring 311 and the second buckling ring 312 can ensure the stability of the sheath. The skeleton layer can be filled between the sheath body 310 and the optical cable 600. The skeleton layer It can play the role of supporting the optical cable 600 and also play the role of sealing. The end of the tail plug 320 away from the sheath body 310 is sealed and connected to the optical cable 600 through the vulcanized connection layer 330, that is, the end of the tail plug 320 away from the sheath body 310 can be poured with vulcanized rubber, and the vulcanized connection layer 330 can be formed after the vulcanized rubber hardens to form a seal between the tail plug 320 and the optical cable 600, and the heat shrinkable sleeve 340 is sequentially sleeved on the optical cable 600, the vulcanized connection layer 330 and the tail plug 320, and abuts against the end of the sheath body 310, that is, the outer side of the vulcanized connection layer 330 is also sleeved with a heat shrinkable sleeve 340, which further improves the sealing performance. Specifically, the heat shrinkable sleeve 340 has a special function of shrinking when heated, and can shrink when heated above a certain temperature, which is convenient for sealing. In addition, the sheath body 310 includes but is not limited to a PU (polyurethane) sheath. It should be particularly noted that the outer sheath of the optical cable 600 in the protective surface layer of the optical cable 600 can be stripped off at the position of the optical cable 600 corresponding to the vulcanized connecting layer 330 so that the inner armor layer in the protective surface layer is exposed, and the vulcanized connecting layer 330 seals and connects the inner armor layer with the tail plug core 320.

[0049] In one embodiment of the present invention, the skeleton layer includes a support skeleton body 350 and a gel filling body 360, and the support skeleton body 350 and the gel filling body 360 are alternately arranged between the jacket body 310 and the optical cable 600 along the extension direction of the optical cable 600. The support skeleton body 350 facilitates the support of the optical cable 600, and the gel filling body 360 can not only support the optical cable 600, but also play a sealing role.

[0050] See also Figure 1 and Figure 7In one embodiment of the present invention, the tail plug core 320 includes a vulcanization sealing section 321 and a sleeve sealing section 322 which are arranged in sequence. The diameter of the vulcanization sealing section 321 is smaller than the diameter of the sleeve sealing section 322. The vulcanization connection layer 330 extends from the end surface of the vulcanization sealing section 321 to the peripheral side of the vulcanization sealing section 321. The heat shrinkable sleeve 340 and the sheath body 310 both extend to be sleeved on the sleeve sealing section 322, and the sleeve sealing section 322 is provided with a groove 323 for the colloid of the vulcanization connection layer 330 to enter. That is, by adding the groove 323, a small part of the vulcanized rubber can flow into the groove 323 when the vulcanized rubber is poured, so as to enhance the sleeve stability of the heat shrinkable sleeve 340 and / or the sheath body 310 on the tail plug core 320. Specifically, there are a plurality of grooves 323 on the sleeve sealing section 322, and the plurality of grooves 323 are sequentially spaced along the length direction of the sleeve sealing section 322.

[0051] Therefore, the fiber optic hydrophone array joint structure provided by the present invention adopts a multiple sealing method of vulcanization + filling with glue + O-ring sealing to improve the joint sealing performance, and the joint tail adopts a snap-on Hough structure anti-bending device + rubber anti-bending device structure to improve the bending resistance of the joint. The optical cable load-bearing steel wire is clamped by a wedge structure, and the steel wire tail is bent and bonded by epoxy resin glue to improve the overall tensile performance.

[0052] In addition, see Figure 1 and Figure 8 The present invention also provides a fiber optic hydrophone array, wherein the fiber optic hydrophone array includes a subarray, a junction box 500, and a fiber optic hydrophone array joint structure according to the above, the end of the optical cable 600 of each subarray is provided with a joint structure, and the two ends of the junction box 500 are respectively and one-to-one mounted on the outside of the fiber optic joint assembly 200 of the two joint structures, so that the optical fiber units extending from the two joint structures can be welded in the box cavity of the junction box 500. The addition of the junction box 500 can realize the sealed welding of the optical fiber units extending from two different joint structures. In addition, since the fiber optic hydrophone array adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0053] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0056] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fiber optic hydrophone array joint structure, characterized in that: The optical fiber hydrophone array joint structure comprises: A wedge block assembly, comprising an outer wedge block and an inner wedge block which can be wedged into the inner cavity of the outer wedge block from the wedge-mounted end of the outer wedge block, wherein the outer wall of the inner wedge block is used to press the load-bearing metal wire of the optical cable against the inner wall of the outer wedge block, and the inner cavity of the inner wedge block can allow the optical fiber unit of the optical cable to pass through; An optical fiber connector assembly is sleeved on the wedge-mounted end of the outer wedge block and is capable of allowing the optical fiber unit to extend; An inner sheath component is sleeved on the outer side of the optical cable, one end of the inner sheath component is buckled and pressed on the end of the outer wedge-shaped block away from the wedge-mounted end, and the other end is sealed and connected to the protective surface layer of the optical cable; An outer anti-bending component is sleeved on the outer side of the inner sheath component and includes a Huff anti-bending sleeve and a rubber anti-bending sleeve. One end of the Huff anti-bending sleeve is sleeved on the outer side of the optical fiber connector component, and the other end is connected to the rubber anti-bending sleeve. The Huff anti-bending sleeve includes at least two Huff sleeve units that are sequentially buckled and connected. The two ends of the Huff sleeve unit are respectively provided with an inner buckle block part and an outer buckle groove part. The inner buckle block part of one of the two adjacent Huff sleeve units is buckled on the outer buckle groove part of the other Huff sleeve unit in an adjustable angle.

2. The optical fiber hydrophone array joint structure according to claim 1, characterized in that: The Hough casing unit includes a first diameter section, a reducing section and a second diameter section which are sequentially connected along the length direction. The diameter size of the first diameter section is smaller than the diameter size of the second diameter section. The first diameter section protrudes outwardly from one end of the reducing section and is provided with an external buckle block portion, so that the external buckle block portion and the reducing section are combined to form the external buckle groove portion. The second diameter section protrudes inwardly from one end of the reducing section and is provided with the internal buckle block portion. The internal buckle block portion and the reducing section are combined to form an internal buckle groove portion for buckling the external buckle block portion.

3. The optical fiber hydrophone array joint structure according to claim 1, characterized in that: The Hough anti-bending sleeve also includes an end fixing sleeve, a first end of which is formed with a first internal thread section threadedly connected to the optical fiber connector assembly, and a second end of the end fixing sleeve is formed with the external buckle groove portion for buckling and connecting the internal buckle block portion of the Hough sleeve unit.

4. The optical fiber hydrophone array joint structure according to claim 3, characterized in that: A first limiting step is formed on the inner wall of the end fixing sleeve, and the first limiting step can abut against an end of the optical fiber connector assembly disposed toward the inner sheath assembly.

5. The optical fiber hydrophone array joint structure according to claim 4, characterized in that: The end fixing sleeve includes a first buckled pipe section and a connecting pipe section, the first end of the connecting pipe section forms the first internal thread section, the second end of the connecting pipe section is reduced in diameter inward to form the first limiting step and the second limiting step on the inner wall and the outer wall respectively, and the second end of the connecting pipe section is formed with a first external thread section, one end of the first buckled pipe section is threadedly connected to the first external thread section and can abut against the second limiting step, and the other end is formed with the external buckle groove.

6. The optical fiber hydrophone array joint structure according to claim 1, characterized in that: The rubber anti-bending sleeve includes a rubber tube body and a second buckled tube section, the second buckled tube section is configured to be spliced ​​along the circumferential direction, and the first end of the second buckled tube section is formed with the inner buckle block portion, and the second end is configured to be reduced in diameter inward to form a third limiting step on the outer wall, one end of the rubber tube body is injection-molded with an injection molded part formed with a second internal threaded section, and the injection molded part is threadedly connected to the second end of the second buckled tube section through the second internal threaded section.

7. The optical fiber hydrophone array joint structure according to any one of claims 1 to 6, characterized in that: The outer wedge block includes a wedge block body, a soft sleeve and a pressing piece. The inner cavity of the wedge block body includes a pressing space, a containing space and a wedge-fitting space which are arranged in sequence. The inner wedge block can be wedged into the wedge-fitting space. The soft sleeve can be placed in the containing space and can allow an optical cable with a protective surface layer to pass through. The pressing piece can allow the optical cable to pass through and can be screwed and installed in the pressing space to compress the soft sleeve against the protective surface layer of the optical cable. And / or, the optical fiber connector assembly includes a connector body and an optical fiber connector, the connector body is mounted on the circumferential side of the wedge-mounted end and is surrounded by the end face of the wedge-mounted end to form a packaging space, a first sealing ring is provided between the connector body and the circumferential side of the wedge-mounted end, and the connector body is further provided with a third internal thread section on the side of the first sealing ring close to the end face of the wedge-mounted end, the third internal thread section is threadedly connected to the circumferential side of the wedge-mounted end, the connector body is further provided with a fixing screw on the side of the end of the first sealing ring away from the wedge-mounted end, the fixing screw can be screwed into the circumferential side of the wedge-mounted end, a packaging port is formed on the end face of the connector body facing the wedge-mounted end, the optical fiber connector can be screwed and installed at the packaging port, and a second sealing ring is provided between the optical fiber connector and the inner wall of the packaging port, and the optical fiber connector has a groove for allowing the optical fiber unit to extend.

8. The optical fiber hydrophone array joint structure according to any one of claims 1 to 6, characterized in that: The inner sheath assembly includes a sheath body, a skeleton layer, a tail plug core, a vulcanized connection layer and a heat shrinkable sleeve. The sheath body and the tail plug core are sequentially sleeved on the outside of the optical cable from the outer wedge block. One end of the sheath body is buckled to the end of the outer wedge block away from the wedge-mounted end through a first buckling ring, and the other end is buckled to one end of the tail plug core through a second buckling ring. The skeleton layer can be filled between the sheath body and the optical cable, and the end of the tail plug core away from the sheath body is sealed and connected to the optical cable through the vulcanized connection layer, and the heat shrinkable sleeve is sequentially sleeved on the optical cable, the vulcanized connection layer and the tail plug core, and abuts against the end of the sheath body.

9. The optical fiber hydrophone array joint structure according to claim 8, characterized in that: The skeleton layer comprises a supporting skeleton body and a gel filling body, and the supporting skeleton body and the gel filling body are alternately arranged in sequence between the sheath body and the optical cable along the extension direction of the optical cable; And / or, the tail plug core includes a vulcanization sealing section and a sleeve sealing section which are arranged in sequence, the diameter of the vulcanization sealing section is smaller than the diameter of the sleeve sealing section, the vulcanization connecting layer extends from the end face of the vulcanization sealing section to the peripheral side of the vulcanization sealing section, the heat shrink sleeve and the sleeve body both extend to be sleeved on the sleeve sealing section, and the sleeve sealing section is provided with a groove for the colloid forming the vulcanization connecting layer to enter.

10. A fiber optic hydrophone array, characterized in that: The fiber optic hydrophone array comprises a subarray, a junction box, and a fiber optic hydrophone array joint structure according to any one of claims 1 to 9, the end of the optical cable of each subarray is provided with the joint structure, and the two ends of the junction box are respectively and one-to-one mounted on the outside of the optical fiber joint components of the two joint structures, so that the optical fiber units extending from the two joint structures can be fused in the box cavity of the junction box.

Images