A fixing clamp and test equipment for sea optical cable back tension and stretch test

Abstract

The application relates to a fixing clamp and test equipment for a sea optical cable torsion and tension test, which comprises a fiber fusion box, a wedge-shaped clamping piece, a fiber coiling box and a fiber sliding ring; the fastening part of the wedge-shaped clamping piece is connected with the steel wire layer of the twisted end of the sea optical cable, and the wedge-shaped clamping piece is provided with a first fiber passing hole; the both ends of the fiber coiling box body are respectively provided with a first storage space and a second storage space; the fiber fusion groove of the fiber fusion box is arranged on the side of the fiber fusion box body far from the fiber coiling box, and the both ends of the fiber fusion box body are respectively provided with a first communication hole and a second communication hole; the optical fibers of the twisted end are sequentially arranged in the fiber fusion groove through the first fiber passing hole, the first storage space and the first communication hole; the jumper wires are sequentially arranged in the fiber fusion groove through the second storage space and the second communication hole; and M optical fibers and N jumper wires are fused one by one in the fiber fusion groove. The fiber coiling box and the fiber fusion box in the application effectively protect the optical fibers and can monitor the actual transmission rate change and strain change of each optical fiber.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of a torsion relaxation test of a submarine optical cable, and particularly relates to a fixing clamp and a test equipment for the torsion relaxation test of the submarine optical cable. BACKGROUND

[0002] The torsion relaxation test of the submarine optical cable refers to fixing one end of the submarine optical cable to prevent rotation under the nominal instantaneous tensile strength (NTTS), and the other end can be arbitrarily twisted (can rotate freely). In order to facilitate the description below, the end is called the fixed end, and the other end is called the twisted end. Since the armored steel wires of the submarine optical cable are mostly in a same direction twisting structure, when the test equipment applies tension to the submarine optical cable, the twisted end will certainly rotate in the direction of reducing the torque. Therefore, the fixing clamp of the twisted end should not be unable to monitor the optical fiber optical performance due to rotation or generate excessive interference influence (non-product performance) due to the rotation disturbance of the optical fiber.

[0003] There are mainly two kinds of fixing clamps for the torsion relaxation test of the submarine optical cable in the prior art, one is a reverse conical self-locking clamp scheme, and the other is a scheme of integrating a half joint box. However, the two schemes have the following problems:

[0004] 1. The optical fiber at the twisted end cannot be effectively protected during the torsion relaxation test, and the optical fiber is usually directly scattered outside the fixing clamp or is in a suspended state, which affects the accuracy of the optical fiber monitoring data;

[0005] 2. All the optical fibers in the submarine optical cable are fused into a loop for monitoring, and only the test results can be averaged, and the actual transmittance change of each optical fiber cannot be monitored. SUMMARY

[0006] Therefore, the technical problem to be solved by the application is to overcome the defects that the accuracy of the optical fiber monitoring data is affected and the actual transmittance change of each optical fiber cannot be monitored in the prior art.

[0007] To solve the above technical problems, on one hand, the application provides a test equipment for the torsion relaxation test of a submarine optical cable, which comprises:

[0008] a fixing device and a base, the fixing device and the base are arranged at intervals, and the fixing device fixes a fixed end of the submarine optical cable;

[0009] a moving device, the moving device is slidingly connected in the base, and the moving device is rotationally connected with a twisted end of the submarine optical cable;

[0010] and a fixing clamp, the fixing clamp is connected to the twisted end of the submarine optical cable.

[0011] On the other hand, the application provides a fixing clamp for the torsion relaxation test of a submarine optical cable, which comprises:

[0012] a fiber fusion box, a wedge-shaped clamping member connected in sequence in the axial direction of the submarine optical cable, a fiber tray, and a fiber slip ring;

[0013] The wedge-shaped clamping member is used for clamping the twisted end of the submarine optical cable, and the wedge-shaped clamping member is provided with a first fiber passing hole;

[0014] The fiber tray comprises a fiber tray body, and the fiber tray body is provided with a first storage space and a second storage space at two ends respectively, and the first storage space is in communication with the first fiber passing hole;

[0015] The fiber fusion box comprises a fiber fusion box body and a fiber fusion groove; the fiber fusion groove is arranged on the side of the fiber fusion box body away from the fiber tray, and the fiber fusion box body is provided with a first communication hole and a second communication hole at two ends respectively;

[0016] The fiber slip ring comprises a rotatingly connected slip ring stator and slip ring rotor;

[0017] The optical fibers of the twisted end are arranged in the fiber fusion groove in sequence through the first fiber passing hole, the first storage space and the first communication hole; the jumper wires are arranged in the fiber fusion groove in sequence through the second storage space and the second communication hole; the optical fibers are M in number, the jumper wires are N in number, and M≤N, and the M optical fibers and the N jumper wires are fusion-spliced one by one in the fiber fusion groove.

[0018] In an embodiment of the application, the fiber tray further comprises a fiber tray groove, the fiber tray groove is located on the side of the fiber tray body connected with the fiber fusion box, and the fiber tray groove is in communication with the first storage space, the second storage space, the first communication hole and the second communication hole.

[0019] In an embodiment of the application, the fiber tray groove is two, and the fiber fusion box is also two; the two fiber fusion boxes and the two fiber tray grooves are arranged in one-to-one correspondence, and the two fiber tray grooves are arranged in radial symmetry with respect to the submarine optical cable.

[0020] In an embodiment of the application, the application further comprises a transition connecting member; the transition connecting member is connected between the wedge-shaped clamping member and the fiber tray;

[0021] The end of the transition connecting member close to the wedge-shaped clamping member is provided with a storage groove for storing the 5 steel wire layer, the storage groove is in communication with the first fiber passing hole; the transition connecting member is further provided with a second fiber passing hole in communication with the storage groove and the first storage space.

[0022] The end of the transition connecting member close to the wedge-shaped clamping member is provided with a storage groove for storing the 5 steel wire layer, the storage groove is in communication with the first fiber passing hole; the transition connecting member is further provided with a second fiber passing hole in communication with the storage groove and the first storage space.

[0023] In an embodiment of the application, the application further comprises a center positioning rod, one end of the center positioning rod is connected in the second fiber passing hole of the transition connecting member, the center positioning rod is provided with a third fiber passing hole, and the third fiber passing hole is coaxially arranged and in communication with the first fiber passing hole.

[0024] In an embodiment of the application, the steel wire layer of the submarine optical cable comprises outer armored steel wires and inner armored steel wires;

[0025] The wedge clamp is provided with a fastening part, which includes a clamping body, an outer armor cone and an inner armor cone arranged sequentially from the outside to the inside; a first locking hole for locking the outer armor steel wire is provided between the clamping body and the outer armor cone, and a second locking hole for locking the inner armor steel wire is provided between the outer armor cone and the inner armor cone; both the first locking hole and the second locking hole are tapered holes.

[0026] 5. Among them, the outer armor steel wire is fixed in the first clamping hole, and the inner armor steel wire is fixed in the second clamping hole.

[0027] Install in the hole.

[0028] In one embodiment of the invention, the outer wall of the outer armor taper near the fiber optic disc box is provided with multiple toothed grooves, and the multiple toothed grooves are arranged in a circle around the circumference of the outer armor taper, with the outer armor steel wire located in the toothed grooves.

[0029] In one embodiment of the invention, the fiber melting tank is provided with two baffles and two bosses. The two bosses are respectively located near the first connecting hole and the second connecting hole. The bosses and baffles are flush with the circumferential sidewalls of the fiber melting tank.

[0030] There is a predetermined distance; the protrusions and baffles are arranged in a staggered manner.

[0031] In one embodiment of the invention, the fiber optic box body is provided with a plurality of ears, which are arranged in a circle along the fiber optic groove. The ears are located above the fiber optic groove and are parallel to the lower surface of the fiber optic groove.

[0032] Compared with the prior art, the above-mentioned technical solution of the invention has the following advantages: 5. The wedge-shaped clamping element provided in the fixing clamp of the invention achieves tight clamping of the twisted end of the submarine optical cable.

[0033] The fiber optic cable and fusion splice box are used to coil the fiber optic cable and patch cords. This effectively protects the twisted ends of the fiber optic cable, preventing increased attenuation due to significant shaking caused by rotation and avoiding interference from rotation (not related to product performance). Furthermore, the fusion splice box allows for one-to-one fusion splicing of the fiber optic cable and patch cord, enabling monitoring of the actual transmittance and strain changes of each fiber path, ensuring the accuracy of test data. The rotatable connection between the stator and rotor of the fiber optic slip ring allows for monitoring of the actual transmittance and strain changes of each fiber path even during rotation, and enables continuous monitoring of fiber optic signal data under continuous rotation conditions, preventing damage to the fiber optic cable due to end rotation. Attached Figure Description

[0034] To make the invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0035] Figure 1 is a test equipment schematic diagram of the application of a fixing clamp for the back-torque tensile test of a submarine optical cable;

[0036] Figure 2 is a three-dimensional schematic diagram of the application of a fixing clamp for the back-torque tensile test of a submarine optical cable;

[0037] Figure 3 is Figure 2 is a three-dimensional schematic diagram of the application of a fixing clamp for the back-torque tensile test of a submarine optical cable (without cover);

[0038] Figure 4 is a sectional view of the application of a fixing clamp for the back-torque tensile test of a submarine optical cable;

[0039] Figure 5 is Figure 2 is a three-dimensional schematic diagram of the application of a fixing clamp for the back-torque tensile test of a submarine optical cable (without cover and fiber fusion box);

[0040] Figure 6 is a structural schematic diagram of the fiber fusion box in the application of a fixing clamp for the back-torque tensile test of a submarine optical cable;

[0041] Figure 7 is a schematic diagram of the winding of optical fibers and jumpers in the disc fiber box in the application of a fixing clamp for the back-torque tensile test of a submarine optical cable;

[0042] Figure 8 is a schematic diagram of the winding of optical fibers and jumpers in the fiber fusion box in the application of a fixing clamp for the back-torque tensile test of a submarine optical cable;

[0043] Figure 9 is a three-dimensional schematic diagram of the application of a fixing clamp for the back-torque tensile test of a submarine optical cable.

[0044] Explanation of the drawing marks in the specification:

[0045] 1, fixing clamp; 2, moving device; 3, base 3; 4, fixing device; 5, bearing;

[0046] 100, fiber fusion box; 110, fiber fusion box body; 111, ear; 120, fiber fusion groove; 121, baffle; 122, boss; 130, first communication hole; 140, second communication hole;

[0047] 200, submarine optical cable; 210, fixed end; 220, twisted end; 230, outer steel wire armor; 240, inner steel wire armor; 250, optical fiber; 260, optical unit.

[0048] 300, wedge-shaped clamping piece; 310, first fiber passing hole; 320, clamping body; 330, outer armor clamping cone; 331, tooth groove; 340, inner armor clamping cone; 350, first clamping hole; 360, second clamping hole; 370, inner armor insert;

[0049] 400, fiber disc box; 410, fiber disc box body; 411, partition plate; 420, first storage space; 430, second storage space; 440, fiber disc groove;

[0050] 500, fiber optic slip ring; 510, slip ring stator; 520, slip ring rotor; 530, jumper wire;

[0051] 600, transition connector; 610, storage groove; 620, second fiber passing hole;

[0052] 700, center positioning rod; 710, third fiber passing hole; 720, setscrew;

[0053] 800, cover;

[0054] 900, fiber optic heat shrink tube. DETAILED DESCRIPTION

[0055] The application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the application and implement it. The embodiments are not intended to limit the application.

[0056] Referring to Figure 1 The application provides a test device for a submarine optical cable back-torque tensile test, which comprises:

[0057] A fixing device 4 and a base 3 are arranged at intervals, and the fixing device 4 fixes a fixed end 210 of the submarine optical cable 200.

[0058] A moving device 2 is slidingly connected in the base 3, and the moving device 2 is rotationally connected to a twisted end 220 of the submarine optical cable 200 through a bearing.

[0059] A fixing clamp 1 is connected to the twisted end 220 of the submarine optical cable 200.

[0060] Referring to Figures 2-9 The application provides a fixing clamp for a submarine optical cable back-torque tensile test, which comprises a fiber melting box 100 and a wedge-shaped clamping piece 300, a fiber disc box 400 and a fiber optic slip ring 500 connected in sequence in the axial direction of the submarine optical cable 200, and the axial direction of the submarine optical cable 200 is the X direction.

[0061] The wedge-shaped clamping piece 300 is used for clamping the twisted end of the submarine optical cable, and the wedge-shaped clamping piece 300 is provided with a first fiber passing hole 310.

[0062] The disc fiber box 400 comprises a disc fiber box body 410, two ends of the disc fiber box body 410 in the X direction are respectively provided with a first storage space 420 for accommodating the optical fiber 250 of the twisted end 220 and a second storage space 430 for accommodating the jumper 530 of the fusion fiber box 100, the first storage space 420 is in communication with the first fiber passing hole 310;

[0063] The fusion fiber box 100 comprises a fusion fiber box body 110 and a fusion fiber groove 120; the fusion fiber groove 120 is arranged on the side of the fusion fiber box body 110 away from the disc fiber box 400, the fusion fiber box body 110 is respectively provided with a first communication hole 130 and a second communication hole 140 at two ends in the X direction, the first communication hole 130 is in communication with the fusion fiber groove 120 and the first storage space 420, and the second communication hole 140 is in communication with the fusion fiber groove 120 and the second storage space 430;

[0064] The optical fiber slip ring 500 comprises a slip ring stator 510 and a slip ring rotor 520 connected in rotation, the slip ring rotor 520 is connected with the fusion fiber box 100, and the slip ring rotor 520 is provided with the jumper 530 extending to the outside thereof;

[0065] The optical fiber 250 of the twisted end 220 is sequentially arranged in the fusion fiber groove 120 through the first fiber passing hole 310, the first storage space 420 and the first communication hole 130; the jumper 530 is sequentially arranged in the fusion fiber groove 120 through the second storage space 430 and the second communication hole 140; the optical fiber 250 is M in number, the jumper 530 is N in number, and M≤N, the M optical fibers 250 and the N jumpers 530 are fusion spliced in the fusion fiber groove 120 one by one, and the optical fiber 250 and the jumper 530 are fixedly spliced by the optical fiber heat shrink tube 900.

[0066] It should be noted that the wedge-shaped clamping piece 300 in the embodiment realizes the fastening connection of the twisted end 220 of the submarine cable 200, then a certain length of the optical unit 260 of the twisted end 220 is stripped, so that M optical fibers 250 are formed by stripping the optical unit 260, then the optical fiber 250 is wound in the fusion fiber groove 120 through the first storage space 420 and the first communication hole 130. Similarly, N jumpers 530 are also wound in the fusion fiber groove 120 through the second storage space 430 and the second communication hole 140. Then the optical fiber 250 and the jumper 530 are fusion spliced one by one in the fusion fiber groove 120. Thus, the transmittance change and the strain change of each optical fiber 250 can be monitored.

[0067] Specifically, the wedge-shaped clamping piece 300 in the embodiment is arranged to achieve the fastening connection of the twisted end 220 of the submarine optical cable 200; the disc fiber box 400 and the fusion fiber box 100 are arranged to disc the optical fiber 250 and the jumper 530, so that the optical fiber 250 of the twisted end 220 is effectively protected by the disc fiber box 400 and the fusion fiber box 100, the optical fiber 250 will not be shaken greatly due to rotation, and the attenuation of the optical fiber 250 will not be increased, and the interference (non-product performance) caused by rotation is avoided; in addition, the optical fiber 250 and the jumper 530 can be fusion spliced one by one in the fusion fiber groove 120 of the fusion fiber box 100, so that the actual transmittance change and strain change of each optical fiber 250 can be monitored, and the accuracy of test data is ensured; the slip ring stator 510 and the slip ring rotor 520 of the optical fiber slip ring 500 are rotationally connected, so that the actual transmittance change and strain change of each optical fiber 250 can be monitored even in the rotating process, and the signal data of the optical fiber 250 can be continuously monitored in the continuous rotating working condition, and damage to the optical fiber 250 caused by end rotation is avoided.

[0068] The present application realizes real-time monitoring of the actual transmittance change and strain of each optical fiber 250 of the twisted end 220 at low cost and high efficiency. The present application does not need high material cost and integration time, and can effectively protect the optical fiber 250 of the twisted end 220 of the submarine optical cable 200, and ensure the reliability of the test results in the untwisting and stretching test. The actual transmittance and strain change results of each optical fiber 250 can be obtained.

[0069] In addition, the components in the embodiment are connected by threads, and can be installed and removed, so that they can be used repeatedly.

[0070] In some possible embodiments, the disc fiber box and the fusion fiber box 100 are made of light materials. Specifically, the disc fiber box 400 and the fusion fiber box 100 are made of light materials to ensure that the center of gravity of the entire fixing clamp is at the wedge-shaped clamp, so that the fixing clamp will not be thrown by the centrifugal force generated by rotation.

[0071] Further, the disc fiber box 400 further comprises a disc fiber groove 440, the disc fiber groove 440 is located on the side where the disc fiber box body 410 is connected with the fusion fiber box 100, and the disc fiber groove 440 is in communication with the first storage space 420, the second storage space 430, the first communication hole 130 and the second communication hole 140.

[0072] Specifically, the disc fiber groove 440 in the embodiment is arranged to facilitate the discing of the excess optical fiber 250 and then introducing the optical fiber 250 into the fusion fiber box 100 for fusion splicing.

[0073] Further, the disc fiber groove 440 is two, and the fusion fiber box 100 is also two; the two fusion fiber boxes 100 are arranged one by one corresponding to the two disc fiber grooves 440, and the two disc fiber grooves 440 are arranged symmetrically in the radial direction of the submarine optical cable 200.

[0074] Specifically, the two disc fiber slots 440 and the two fusion fiber boxes 100 can accommodate the fusion spliced optical fibers 250 and the jumper 530, and can meet the testing requirements of the large-core-count submarine cable 200.

[0075] Further, the part of the disc fiber box body 410 between the two disc fiber slots 440 is a partition plate 411, and the partition plate 411 is provided with a through hole communicating with the first storage space 420 and the second storage space 430, that is, the partition plate 411 is divided into two half partition plates 411, and the two half partition plates 411 are separated by the through hole.

[0076] Further, the present application further comprises a transition connector 600; the transition connector 600 is connected between the wedge-shaped clamping member 300 and the disc fiber box 400; the transition connector 600 is provided with a storage groove 610 for storing a steel wire layer at one end close to the wedge-shaped clamping member 300, and the storage groove 610 communicates with the first fiber passing hole 310; the transition connector 600 is further provided with a second fiber passing hole 620 communicating with the storage groove 610 and the first storage space 420. The transition connector 600 is made of light material, such as aluminum alloy.

[0077] Specifically, the storage groove 610 of the transition connector 600 in the embodiment is used to store the part of the optical unit 260 protruding from the wedge-shaped clamping member 300.

[0078] Further, the present application further comprises a center positioning rod 700, one end of the center positioning rod 700 is threadedly connected in the second fiber passing hole 620 of the transition connector 600, and the center positioning rod 700 is provided with a third fiber passing hole 710 coaxially arranged and communicating with the first fiber passing hole 310.

[0079] Specifically, the center positioning rod 700 in the embodiment is used to position the optical unit 260 (optical fiber 250).

[0080] Further, the center positioning rod 700 can be of various specifications, and the third fiber passing hole 710 of each specification of the center positioning rod 700 has a different hole diameter. Specifically, the various specifications of the center positioning rod 700 can be adapted to different models of submarine cables 200.

[0081] Further, the other end of the center positioning rod 700 extends into the first storage space 420, and the part of the center positioning rod 700 extending into the first storage space 420 is threadedly connected with a check screw 720 perpendicular to the axis of the third fiber passing hole 710.

[0082] Specifically, the check screw 720 abuts against the outer surface of the optical unit 260 (optical fiber 250), thereby preventing the center positioning rod 700 from loosening.

[0083] Further, the center positioning rod 700 has a first surface parallel to the side wall of the first storage space 420, and the first surface has a small gap with the side wall of the first storage space 420.

[0084] Specifically, the first surface is parallel to the side wall of the first storage space 420 and has a small gap, which prevents the center positioning rod 700 from loosening to a certain extent.

[0085] Further, the steel wire layer of the submarine cable 200 includes outer armor steel wires 230 and inner armor steel wires 240.

[0086] The wedge-shaped clamping piece 300 is provided with a fastening part, and the fastening part includes a clamping body 320, an outer armor clamping cone 330 and an inner armor clamping cone 340 arranged in sequence from outside to inside; the clamping body 320 and the outer armor clamping cone 330 are provided with a first clamping hole 350 for clamping the outer armor steel wires 230, and the outer armor clamping cone 330 and the inner armor clamping cone 340 are provided with a second clamping hole 360 for clamping the inner armor steel wires 240, and the first clamping hole 350 and the second clamping hole 360 are both tapered holes.

[0087] The outer armor steel wires 230 are clamped and fixed in the first clamping hole 350, and the inner armor steel wires 240 are clamped and fixed in the second clamping hole 360.

[0088] Specifically, the first clamping hole 350 and the second clamping hole 360 clamp the outer armor steel wires 230 and the inner armor steel wires 240 respectively, so as to realize the fixed connection of the wedge-shaped clamping piece 300 to the submarine cable 200.

[0089] Further, the wedge-shaped clamping piece 300 further includes an inner armor insert 370, and the inner armor insert 370 is arranged on the large end of the second clamping hole 360 to clamp and fix the inner armor steel wires 240 in the second clamping hole 360.

[0090] It should be noted that the inner armor steel wires 240 are first arranged in the second clamping hole 360 between the outer armor clamping cone 330 and the inner armor clamping cone 340, and then the inner armor steel wires 240 are clamped in the second clamping hole 360 by the inner armor insert 370, so as to realize the fixed connection of the outer armor clamping cone 330 and the inner armor clamping cone 340. Then the outer armor steel wires 230 are arranged outside the outer armor clamping cone 330, and the clamping body 320 is pressed by a hydraulic jack, so that the clamping body 320 hard-presses the outer armor steel wires 230 in the first clamping hole 350. The inner armor insert 370 can be made of red copper.

[0091] Specifically, the inner armor insert 370 in the embodiment clamps and fixes the inner armor steel wires 240 in the second clamping hole 360, and because the inner armor steel wires 240 are relatively soft, the inner armor insert 370 is needed to press and fix them.

[0092] Further, the width of the first clamping hole 350 is smaller than the diameter of the outer armor steel wire 230, for example, the width of the first clamping hole 350 is 0.9 times the diameter of the outer armor steel wire 230.

[0093] Further, the outer armor clamping cone 330 is provided with a plurality of tooth grooves 331 near the outer wall of one end of the disc fiber box 400, the plurality of tooth grooves 331 are arranged in a circle along the circumference of the outer armor clamping cone 330, and the outer armor steel wire 230 is located in the tooth groove 331.

[0094] Specifically, the outer armor steel wire 230 is evenly arranged in the tooth groove 331, and then compacted by the hydraulic jack, so that the compacting is more convenient, and the concentricity of the clamping body 320 and the outer armor clamping cone 330 can be further ensured.

[0095] Further, the fiber melting groove 120 is provided with two baffles 121 and two bosses 122, the two bosses 122 are respectively arranged near the first communication hole 130 and the second communication hole 140, and the boss 122 and the baffle 121 have a predetermined distance from the circumferential side wall of the fiber melting groove 120, so that the optical fiber 250 and the jumper 530 are wound around the boss 122 and the baffle 121 in the fiber melting groove 120 before being fused, the optical fiber 250 is arranged along the outer circle, and the jumper 530 is arranged along the inner circle to cope with the optical fiber 250 retraction phenomenon caused by the cable elongation during rotation; the boss 122 and the baffle 121 are staggered.

[0096] Specifically, the arrangement of the boss 122 and the baffle 121 limits the minimum bending radius of the optical fiber 250 retraction, avoiding additional attenuation (non-product performance) caused by too small bending radius.

[0097] Further, the winding principle of the optical fiber 250 and the jumper 530 in the disc fiber groove 440 is that the optical fiber 250 is arranged along the outer circle, and the jumper 530 is arranged along the inner circle to cope with the optical fiber 250 retraction phenomenon caused by the cable elongation during rotation.

[0098] Further, the boss 122 is a cylindrical structure, and the upper surfaces of the boss 122 and the baffle 121 are flush with the outer surface of the fiber melting box body 110, or the upper surfaces of the boss 122 and the baffle 121 are lower than the outer surface of the fiber melting box body 110.

[0099] Specifically, the cylindrical boss 122 is more convenient for the coiling of the optical fiber 250 and the jumper 530.

[0100] Further, a plurality of ears 111 are arranged on the fiber melting box body 110, the plurality of ears 111 are arranged in a circle along the fiber melting groove 120, the ears 111 are located above the fiber melting groove 120, and the ears 111 are parallel to the lower surface of the fiber melting groove 120.

[0101] Specifically, the ear 111 limits the optical fiber 250 and the jumper 530 coiled in the fusion fiber box 100, avoiding the optical fiber 250 and the jumper 530 from being taken out of the fusion fiber box 100.

[0102] Further, the present application also includes a cover 800 connected to the outside of the fusion fiber box 100, and the cover 800 covers the fusion fiber groove 120.

[0103] Specifically, the cover 800 protects the optical fiber 250 and the jumper 530 coiled in the fusion fiber box 100.

[0104] Further, the wedge-shaped clamping piece 300 is threadedly connected with the transition connector 600, the transition connector 600 is threadedly connected with the fiber coiling box 400, the fiber coiling box 400 is threadedly connected with the fusion fiber box 100, and the fiber coiling box 400 is threadedly connected with the optical fiber slip ring 500.

[0105] Specifically, the threaded connection facilitates installation and disassembly, and can be reused.

[0106] It should be noted that the optical unit 260 of the submarine optical cable 200 passes through the second fiber passing hole 620 of the transition connector 600 and is fixed at the center by using the center positioning rod 700. The optical fiber 250 in the submarine optical cable 200 and the jumper 530 in the optical fiber slip ring 500 are coiled in the fiber coiling groove 440 of the fiber coiling box 400, and then enter the fusion fiber groove 120. After the optical fiber 250 and the jumper 530 are fused one by one, they are fixed in the fusion fiber groove 120 of the fusion fiber box 100.

[0107] It should be noted that M constitutes an integrated optical unit 260, which is arranged in the first fiber passing hole 310, the second fiber passing hole 620 and the third fiber passing hole 710. At the end of the fusion of the optical fiber 250 and the jumper 530, the M optical fibers 250 are released by disassembling the optical unit 260, so that the M optical fibers 250 can be fused one by one with the N jumpers 530.

[0108] It should be noted that the optical unit 260 of the submarine optical cable 200 passes through the center of the transition connector 600 and is positioned by using the center positioning rod 700. A certain length of optical fiber 250 is stripped from the optical unit 260, and the stripped optical fiber 250 is coiled in the fiber coiling box 400. The jumper 530 of the optical fiber slip ring 500 is coiled in the fiber coiling box 400 in the same way. The optical fiber 250 and the jumper 530 in the fiber coiling box 400 are introduced into the fusion fiber groove 120 of the fusion fiber box 100 from the first communication hole 130 and the second communication hole 140 for fusion. After the fusion is completed, the optical fiber is fixed by the optical fiber heat shrink tube 900, and then the cover 800 is sealed for protection.

[0109] Obviously, the above embodiments are merely example for clearly illustrating, and are not limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be enumerated, and the obvious changes or variations derived therefrom are still within the protection scope of the invention.

Claims

1. A fixing clamp for sea optical cable back tension and stretch test, characterized in that: The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures.

2. The fixing clamp for the sea optical cable back tension and stretch test according to claim 1, characterized in that: The application relates to a kind of sea optical cable connection structures.

3. The fixing clamp for the sea optical cable back tension and stretch test according to claim 2, characterized in that: The application relates to a kind of sea optical cable connection structures.

4. The fixing clamp for the sea optical cable back tension and stretch test according to any one of claims 1-3, characterized in that: The application relates to a kind of sea optical cable connection structures.

5. The fixing clamp for the sea optical cable back tension and stretch test according to claim 4, characterized in that: The application relates to a kind of sea optical cable connection structures.

6. The fixing clamp for the sea optical cable back tension and stretch test according to any one of claims 1-3, characterized in that: The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures.

7. The fixture for sea cable back tension and stretch test according to claim 6, characterized in that: The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. 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The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of sea optical cable connection structures. The application relates to a kind of 8. The fixture for sea cable back tension and stretch test according to claim 1, characterized in that: The melt fiber groove is provided with two baffles and two bosses, the two bosses are respectively arranged close to the first communication hole and the second communication hole, the boss and the baffle have a predetermined distance from the circumferential side wall of the melt fiber groove; the boss and the baffle are staggered.

9. The fixing clamp for the sea optical cable back tension and stretch test according to claim 1 or 8, characterized in that: A plurality of ears are arranged on the melt fiber box body, the plurality of ears are arranged in a circle along the melt fiber groove, the ears are located above the melt fiber groove, and the ears are parallel to the lower surface of the melt fiber groove.

10. A test device for a sea optical cable untwisting and tensile test, comprising: a fixing device and a base, the fixing device and the base are arranged at intervals, and the fixing device fixes a fixed end of the sea optical cable; a moving device, the moving device is slidingly connected in the base, and the moving device is rotationally connected with a twisted end of the sea optical cable; and the fixing clamp in any one of claims 1-9, the fixing clamp is connected to the twisted end of the sea optical cable.

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