A mobile joint box

Abstract

The present invention belongs to the technical field of optical cable joint boxes, and in particular, relates to a mobile joint box, comprising a lower shell component and an upper shell component, wherein the lower shell component is used for fusing optical cables, and the upper shell component is used for sealing and protecting the fusing points of the optical cables. The fiber splicing component in the lower shell component of the present invention performs a one-time operation to cut the fiber cores on the same side to the same length when fusing the fiber cores of the optical cable, so that the cutting work before the fiber core fusing is more convenient and simple without cutting all the fiber cores one by one, thereby improving the efficiency of optical cable fusing and fiber core cutting.

Description

Technical Field

[0001] The invention belongs to the technical field of optical cable joint boxes, and in particular relates to a mobile joint box. Background Art

[0002] Fiber optic mobile splice box is a device used in fiber optic communication systems, mainly used to protect fiber optic splices, fix optical fibers and accommodate fiber optic splicing pigtails. It not only provides space for fiber optic splicing, but also plays a role in moisture-proof, corrosion-proof and dust-proof, ensuring the quality and life of fiber optic connections.

[0003] The existing optical fiber splice box is used for splicing between multi-core optical cables, and contains multiple layers of splice trays for placing optical cores. The maintenance and installation work in each splice tray needs to be carried out after the upper splice tray is opened. At the same time, the splice points are distributed on the multiple splice trays, and it is difficult to visually see the splice points without taking measures. It is inconvenient to repair because the splice points cannot be visually seen. Furthermore, the sealing strip between the upper shell and the lower shell of the splice box needs to be tightened and squeezed by bolts to achieve the sealing purpose, which makes it inconvenient to detect and repair the sealing inside the splice box.

[0004] Before optical fiber fusion splicing, considering the subsequent secondary fusion splicing of optical fibers, it is necessary to reserve a sufficient length of optical fiber. After the fusion splicing is completed, the fusion point is fixed in the card slot, and then the excess length of optical fiber is manually arranged so that the excess length of optical fiber is wound around the free space on the fusion splicing tray. Manual winding of optical fiber requires more experience and technical accumulation to complete, and the operation efficiency of beginners is low. For example, the patent with application number 202310893747.3 designs an optical cable rotating tray for winding excess length optical fiber, but due to the different distribution positions of the fusion points, the distances between each fusion point and the rotating tray are different, so there will be a section of optical fiber with a relatively disordered order in the fusion box, and the rotating tray is electrically driven and has a higher cost.

[0005] When the splice box is in use, it is occasionally hit. The optical fiber has a large space in the splice box, and the deformation of the splice box is not easy to damage the fusion point of the optical fiber. However, when the splice box is hit and vibrates, the fusion point may be pulled and broken due to violent jumping.

[0006] The junction box is generally dustproof and waterproof by sealing strips, but the sealing strips will age after a period of use. It is not easy to judge the quality of the sealing strips without disassembling the upper shell and the lower shell, and it is impossible to judge whether the sealing of the junction box still meets the requirements.

[0007] The length of the optical fiber changes due to pulling or thermal contraction. The optical fiber is in a relatively free motion state due to the lack of sufficient constraints, which can cause the transmission capacity of the optical fiber to fluctuate, thereby causing the signal transmission of the optical fiber to be unstable.

[0008] The present invention designs a mobile joint box to solve the above problems. Summary of the invention

[0009] Based on this, it is necessary to provide a mobile joint box for the problems existing in the current joint box. The fiber splicing assembly in the lower shell assembly of the present invention performs a one-time operation to cut the fiber cores on the same side of the same length when performing the core splicing of the optical cable, so that the cutting work before the core splicing is more convenient and simple without cutting all the cores one by one, thereby improving the efficiency of optical cable splicing and core cutting. The second elastic strip of the fiber splicing assembly in the present invention can be wound with a longer core fiber because its diameter can be adjusted, which facilitates the secondary maintenance and splicing of the core fiber after its splicing point is damaged. The fiber splicing assembly in the present invention can directly wind and splice the core, without the need for the complex operation of the fiber splicing and maintenance of the traditional joint box by opening the cover, effectively improving the efficiency of the core splicing and installation and maintenance of the optical cable. The upper shell assembly in the present invention is made of transparent plastic material, and the internal core splicing point is close to the upper shell after the upper shell and the lower shell are closed, so the state of the internal splicing point can be visually observed, the fault point can be quickly located, and the maintenance is convenient and fast. The second elastic strip in the fiber splicing assembly of the present invention can store the fiber core in a single circle through the clamp assembly thereon and can keep the fiber core with sufficient looseness under the condition of satisfying the winding, so as not to be too tight or too loose, effectively limiting the vibration and pulling of the fiber core when the upper shell and the lower shell are hit, and then the wall fiber core is broken and damaged by the pulling of the welding point, and at the same time, it is ensured that the conductive ability of the fiber core is not limited by the vibration and pulling, and has a relatively stable attenuation performance. The sealing detection assembly in the present invention can intuitively observe whether the upper shell and the lower shell in the closed state are in an effective sealing state through visual observation. If the upper shell and the lower shell in the closed state are in an effective sealing state, the piston in the sealing detection assembly will move to a certain extent when the external temperature and air pressure change. If the sealing in the upper shell and the lower shell in the closed state fails, the piston in the sealing detection assembly will eventually be flush with the position marking ring outside the ring sleeve under the action of the air pressure balance on both sides and the two pressure springs, effectively improving the efficiency of sealing detection. In the sealing detection assembly of the present invention, the first elastic strip and the second elastic strip used to fix the fiber core fusion point will undergo a certain elastic movement when the upper shell is impacted, so that the fusion point of the fiber core can avoid the impact vibration transmitted from the upper shell and play a certain degree of buffering effect on the vibration, thereby ensuring that the transmission performance of the fiber core is basically not affected.

[0010] The above purpose is achieved through the following technical solutions:

[0011] A mobile joint box, used for optical cable fusion splicing, comprising:

[0012] A lower shell assembly is used for fusing optical cables, the lower shell assembly includes a lower shell, both ends of the lower shell are provided with a first clamping assembly for protectively fixing three 24-core optical cables at the corresponding ends, both ends of the lower shell are provided with a second clamping assembly for protectively fixing the exposed core fibers of the three optical cables at the corresponding ends, the lower shell is provided with a fiber fusion assembly for protectively fixing the fusion points of the three pairs of optical cables at the two ends, the fiber fusion assembly includes a first arc plate whose axis is parallel to the length direction of the lower shell, an active groove is provided on the arc surface of the first arc plate, and twelve pairs of Slots are evenly distributed around the axis of the first arc plate, and each pair of the slots is inserted with an upwardly arched first elastic strip. A second arc plate is arranged in the middle of the movable groove, and a plurality of annular second elastic strips corresponding to the first elastic strips and adjustable in diameter are arranged on the second arc plate. A plurality of clamp assemblies are arranged on both sides of the second elastic strip to make the corresponding pair of core fibers bend along the second elastic strip. The second elastic strip is fixedly connected to the middle of the corresponding first elastic arc plate through an arc sleeve, and six second clamping grooves are provided on the top arc surface of the arc sleeve to protectively fix the six fusion points of the corresponding pair of core fibers.

[0013] The upper shell assembly is used to seal and protect the fusion point of the optical cable. The upper shell assembly includes an upper shell that is sealed with the lower shell. A sealing detection assembly is provided on the shell wall of the upper shell for visually monitoring the sealing performance of the closed upper shell and lower shell.

[0014] In one of the embodiments, three first wire grooves cooperating with optical cables are provided at both ends of the lower shell body, and rubber sealing sleeves cooperating with optical cables are arranged in the first wire grooves. A first sealing groove connected with the first wire grooves is provided at the edge of the upper end surface of the lower shell body, and a first sealing strip sealingly connected with the sealing sleeve and cooperating with the upper shell body is arranged in the first sealing groove.

[0015] In one of the embodiments, three second wire grooves corresponding to the first wire grooves at the corresponding ends and cooperating with the corresponding sealing sleeves are provided at both ends of the upper shell body, and a circle of second sealing strip is provided at the edge of the lower end surface of the upper shell body, and the cross-section of the lower end of the second sealing strip is a sharp angle, and the sharp angle of the lower end of the second sealing strip cooperates with the V-shaped second sealing groove at the upper end of the first sealing strip.

[0016] In one of the embodiments, the first clamping assembly includes a first clamping plate, which is arranged on the outer side of the corresponding end of the lower shell body, and is provided with three semicircular grooves cooperating with the optical cables. The first clamping plate is connected with three second clamping plates by bolts for pressing and fixing the three optical cables at the corresponding ends to the corresponding semicircular grooves on the first clamping plate, and the second clamping plate is provided with semicircular grooves cooperating with the corresponding optical cables.

[0017] In one of the embodiments, the second clamping assembly includes three fixing posts corresponding to the three optical cables at the corresponding ends and a first clamping strip, the fixing posts are fixed at the first wire groove in the lower shell body, a round hole for inserting the protective steel wire in the corresponding optical cable is provided on the side wall of the fixing post, a locking screw for pressing the protective steel wire in the round hole is threadedly installed in the threaded hole at the top end of the fixing post, the first clamping strip is fixed in the lower shell body through two supporting posts, a second clamping strip is hingedly connected to one end of the first clamping strip, three first clamping grooves for fixing the core fiber in the optical cable are provided on the upper side surface of the first clamping strip and the lower side surface of the second clamping strip, the movable end of the second clamping strip is connected to the second clamping block through an elastic strip, the second clamping block cooperates with the first clamping block at the corresponding end of the first clamping strip, and the first clamping block has two inclined surfaces distributed up and down and cooperating with the second clamping block.

[0018] In one of the embodiments, a plurality of positioning holes distributed along the length direction of the second elastic strip are provided at both ends of the second elastic strip, 12 groups of locking screw holes corresponding to the second elastic strips are provided on the second arc plate, and bolts matching the positioning holes on the corresponding second elastic strips are installed in the inner threads of the locking screw holes, and four connecting sleeves corresponding to the countersunk holes on the inner arc surface of the first arc plate are symmetrically arranged, and the connecting sleeves are connected to the mounting sleeve in the lower shell body through the bolts in the corresponding countersunk holes.

[0019] In one embodiment, the clamp assembly includes a first half hoop, the first half hoop is fixed to the side of the second elastic strip, a second half hoop is hinged to one end of the first half hoop, a spiral spring is provided at the hinge between the second half hoop and the first half hoop to close the two, and a shift block is provided on the outer side of the second half hoop.

[0020] In one embodiment, the sealing detection assembly includes a ring sleeve made of a transparent material, which is threadedly installed at the sealing detection port on the outer side of the upper shell body, a sealing gasket is cooperated between one end of the ring sleeve and the upper shell body, and a clamping ring is provided at the other end of the ring sleeve through bolts, and a waterproof and breathable membrane is clamped between the clamping ring and the end face of the ring sleeve, a piston is slidably arranged in the ring sleeve, and a sealing ring that seals with the wall surface of the ring sleeve is provided on the piston, and the two ends of the piston are respectively connected to the limit rings on the inner wall of the ring sleeve through pressure springs, and a position marking ring indicating the position of the piston is provided on the outer wall of the ring sleeve.

[0021] In one embodiment, the upper shell is made of transparent material.

[0022] In one of the embodiments, a sheath for covering and protecting the fiber core fusion joint of the optical cable is disposed in the second slot, and two protective steel needles are disposed in the wall of the sheath at intervals of 180 degrees in the circumferential direction to prevent the hinge point of the fiber core from bending.

[0023] The beneficial effects of the present invention are:

[0024] 1. The fiber splicing assembly in the lower shell assembly of the present invention performs equal-length cutting of the fiber cores on the same side in a one-time operation when performing fiber core splicing of the optical cable, making the cutting work before fiber core splicing more convenient and simple without the need to cut all the fiber cores one by one, thereby improving the efficiency of optical cable splicing and fiber core cutting.

[0025] 2. The second elastic strip of the fiber splicing assembly in the present invention can be wound around a longer core fiber because its diameter can be adjusted, so that the core fiber can be smoothly repaired and spliced ​​for the second time after its splicing point is damaged.

[0026] 3. The fiber splicing assembly of the present invention can directly wind and fuse the fiber core, without the need for the complicated operation of opening the fiber splicing tray in the traditional joint box by flipping open the cover to perform fiber splicing and maintenance, effectively improving the efficiency of fiber core welding and installation and maintenance of the optical cable.

[0027] 4. The upper shell assembly in the present invention is made of transparent plastic material, and the internal fiber core fusion point is close to the upper shell after the upper shell and the lower shell are closed. The state of the internal fusion point can be visually observed, the fault point can be quickly located, and maintenance is convenient and quick.

[0028] 5. The second elastic strip in the fiber splicing assembly of the present invention can store the fiber core by a single circle winding through the clamp assembly thereon and can keep the fiber core with sufficient looseness under the winding condition so as not to be too tight or too loose, thereby effectively limiting the vibration and pulling of the fiber core when the upper shell and the lower shell are hit, and then the wall fiber core is broken and damaged at the fusion point due to pulling, and at the same time, it ensures that the conduction capacity of the fiber core is not limited by vibration and pulling, and has a more stable attenuation performance.

[0029] 6. The sealing detection component in the present invention can intuitively observe visually whether the upper shell and the lower shell in the closed state are in an effective sealing state. If the upper shell and the lower shell in the closed state are in an effective sealing state, the piston in the sealing detection component will move to a certain extent when the external temperature and air pressure change. If the seal in the upper shell and the lower shell in the closed state fails, the piston in the sealing detection component will eventually be flush with the position marking ring on the outside of the ring sleeve under the action of the air pressure balance on both sides and the two pressure springs, thereby effectively improving the efficiency of sealing detection.

[0030] 7. In the sealing detection assembly of the present invention, the first elastic strip and the second elastic strip used to fix the fusion point of the fiber core will undergo a certain elastic movement when the upper shell is impacted, so that the fusion point of the fiber core can avoid the impact vibration transmitted from the upper shell and play a certain degree of buffering effect on the vibration, thereby ensuring that the transmission performance of the fiber core is basically not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the open state of the present invention;

[0032] Figure 2 is a cross-sectional view of the present invention in an opened state;

[0033] Figure 3 is a cross-sectional view of the lower shell assembly of the present invention;

[0034] Figure 4 is a top cross-sectional view of the lower shell assembly of the present invention;

[0035] Figure 5 It is a cross-sectional view of the cooperation between the second clamping assembly in the lower shell assembly of the present invention and the core fiber of the optical cable;

[0036] Figure 6 It is a partial cross-sectional view of the cooperation between the second clamping assembly in the lower shell assembly of the present invention and the core fiber of the optical cable;

[0037] Figure 7 It is a schematic diagram of the cooperation between the first clamping assembly and the optical cable in the lower shell assembly of the present invention;

[0038] Figure 8 It is a schematic diagram of a single group of fiber fusion components in the lower shell component of the present invention;

[0039] Fig. 9 It is a partial diagram of the cooperation between the second elastic strip and the second arc plate in the fiber splicing assembly of the present invention;

[0040] Fig.10 It is a cross-sectional view of the cooperation between the clamp assembly on the second elastic strip and the core fiber in the fiber splicing assembly of the present invention;

[0041] Fig.11 It is a cross-sectional view of the cooperation between the second clamping groove on the arc sleeve and the fiber core of the optical cable in the fiber splicing assembly of the present invention;

[0042] Fig.12 It is a schematic diagram of the distribution state of the second elastic strip and the corresponding arc sleeve in the fiber splicing assembly of the present invention;

[0043] Fig.13 is a cross-sectional view of the present invention in a closed state;

[0044] Fig.14 is a cross-sectional view of a sealing detection component in an upper shell component of the present invention;

[0045] Fig.15 It is a schematic diagram of the structure of the upper shell and the lower shell;

[0046] Fig.16 It is a partial cross-sectional view of the upper shell and the lower shell;

[0047] Fig.17 is a cross-sectional view of the sealing cooperation between the upper shell and the lower shell;

[0048] Fig.18 It is a schematic diagram of the state change of the fiber splicing component in the lower shell component and the upper shell component;

[0049] Name of the label in the figure:

[0050] 100, lower shell assembly; 101, lower shell; 102, first wire slot; 103, first sealing slot; 104, first sealing strip; 105, second sealing slot; 106, sealing sleeve; 107, mounting sleeve;

[0051] 200, first clamping assembly; 201, first clamping plate; 202, second clamping plate;

[0052] 300, second clamping assembly; 301, fixing column; 302, locking screw; 303, first clamping strip; 304, first clamping slot; 305, first clamping block; 306, supporting column; 307, second clamping strip; 308, elastic strip; 309, second clamping block;

[0053] 400, fiber splicing assembly; 401, first arc plate; 402, movable slot; 403, slot; 404, connecting sleeve; 405, second arc plate; 406, locking screw hole; 407, first elastic strip; 408, second elastic strip; 409, positioning hole; 410, arc sleeve; 411, second slot;

[0054] 500, clamp assembly; 501, first half hoop; 502, second half hoop; 503, shift block;

[0055] 600, upper shell assembly; 601, upper shell; 602, second wire slot; 603, sealing detection port; 604, second sealing strip;

[0056] 700, sealing detection assembly; 701, ring sleeve; 702, limiting ring; 703, position marking ring; 704, piston; 705, sealing ring; 706, sealing pad; 707, pressure spring; 708, waterproof breathable membrane; 709, clamping ring;

[0057] 801, optical cable; 802, core fiber; 803, protective steel wire; 804, fiber core; 805, sheath; 806, protective steel needle. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0059] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0060] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] like Figure 1-17 As shown, a mobile joint box is used for welding optical cable 801, comprising:

[0062] The lower shell assembly 100 is used for welding optical cables 801. The lower shell assembly 100 includes a lower shell 101. The first clamping assembly 200 for protectively fixing three 24-core optical cables 801 at the corresponding ends is arranged outside the two ends of the lower shell 101. The second clamping assembly 300 for protectively fixing the exposed core fibers 802 of the three optical cables 801 at the corresponding ends is arranged inside the two ends of the lower shell 101. The lower shell 101 is provided with a fiber splicing assembly 400 for protectively fixing the welding points of the three pairs of optical cables 801 at the two ends. The fiber splicing assembly 400 includes a first arc plate 401 whose axis is parallel to the length direction of the lower shell 101. The arc surface of the first arc plate 401 is provided with an active groove 402. The two end walls of the active groove 402 are provided with There are twelve pairs of slots 403 evenly distributed around the axis of the first arc plate 401, and each pair of the slots 403 is inserted with an upwardly arched first elastic strip 407. A second arc plate 405 is arranged in the middle of the movable groove 402, and a plurality of annular second elastic strips 408 corresponding to the first elastic strips 407 and adjustable in diameter are arranged on the second arc plate 405. A plurality of clamp assemblies 500 are arranged on both sides of the second elastic strip 408 for bending the corresponding pair of core fibers 802 along the second elastic strip 408. The second elastic strip 408 is fixedly connected to the middle of the corresponding first elastic arc plate through an arc sleeve 410, and six second clamping grooves 411 are provided on the top arc surface of the arc sleeve 410 for protectively fixing the six fusion points of the corresponding pair of core fibers 802.

[0063] The upper shell assembly 600 is used to seal and protect the fusion point of the optical cable 801. The upper shell assembly 600 includes an upper shell 601 that is sealed with the lower shell 101. A sealing detection assembly 700 is provided on the shell wall of the upper shell 601 for visually monitoring the sealing performance of the closed upper shell 601 and the lower shell 101.

[0064] In a further embodiment, Figure 4 , 15 As shown, three first wire grooves 102 cooperating with the optical cable 801 are provided at both ends of the lower shell 101, and rubber sealing sleeves 106 cooperating with the optical cable 801 are arranged in the first wire grooves 102, and a circle of first sealing grooves 103 connected with the first wire grooves 102 is provided at the edge of the upper end surface of the lower shell 101, and a first sealing strip 104 sealingly connected with the sealing sleeve 106 and cooperating with the upper shell 601 is arranged in the first sealing groove 103.

[0065] In a further embodiment, Figure 4 , 12As shown in Figures 13, 15, 16 and 17, three second wire grooves 602 corresponding to the first wire grooves 102 at the corresponding ends and cooperating with the corresponding sealing sleeves 106 are provided at both ends of the upper shell 601, and a circle of second sealing strip 604 is arranged at the edge of the lower end surface of the upper shell 601, and the cross-section of the lower end of the second sealing strip 604 is a sharp angle, and the sharp angle of the lower end of the second sealing strip 604 cooperates with the V-shaped second sealing groove 105 at the upper end of the first sealing strip 104.

[0066] In a further embodiment, Figure 1 , 7 As shown, the first clamping assembly 200 includes a first clamping plate 201, which is arranged on the outer side of the corresponding end of the lower shell 101, and is provided with three semicircular grooves that cooperate with the optical cable 801. The first clamping plate 201 is connected to three second clamping plates 202 by bolts for pressing and fixing the three optical cables 801 at the corresponding ends to the corresponding semicircular grooves on the first clamping plate 201 respectively, and the second clamping plate 202 is provided with semicircular grooves that cooperate with the corresponding optical cables 801.

[0067] In a further embodiment, Figure 1 , 2 , 5, and 6, the second clamping assembly 300 includes three fixing columns 301 corresponding to the three optical cables 801 at the corresponding ends and a first clamping strip 303, the fixing columns 301 are fixed at the first wire groove 102 in the lower shell 101, and the side wall of the fixing column 301 is provided with a round hole for inserting the protective steel wire 803 in the corresponding optical cable 801, and the top threaded hole of the fixing column 301 is threaded with a locking screw 302 for pressing the protective steel wire 803 in the round hole, and the first clamping strip 303 is connected by two support columns 306. Fixed in the lower shell 101, one end of the first clamp 303 is hinged with the second clamp 307, the upper side of the first clamp 303 and the lower side of the second clamp 307 are provided with three first card slots 304 for fixing the core fiber 802 in the optical cable 801, the movable end of the second clamp 307 is connected to the second card block 309 through an elastic strip 308, the second card block 309 cooperates with the first card block 305 at the corresponding end of the first clamp, and the first card block 305 is provided with two inclined surfaces distributed up and down and cooperating with the second card block 309.

[0068] In a further embodiment, Figure 8 , 9As shown in 10, both ends of the second elastic strip 408 are provided with a plurality of positioning holes 409 distributed along the length direction thereof, the second arc plate 405 is provided with 12 groups of locking screw holes 406 corresponding one-to-one to the second elastic strips 408, the locking screw holes 406 are internally threaded with bolts matching the positioning holes 409 on the corresponding second elastic strips 408, the inner arc surface of the first arc plate 401 is symmetrically provided with four connecting sleeves 404 corresponding one-to-one to the countersunk holes thereon, the connecting sleeve 404 is connected to the mounting sleeve 107 in the lower shell 101 through the bolts in the corresponding countersunk holes.

[0069] In a further embodiment, Fig. 9 , 10 As shown, the clamp assembly 500 includes a first half hoop 501, which is fixed to the side of the second elastic strip 408, and one end of the first half hoop 501 is hinged with a second half hoop 502, and a spiral spring is provided at the hinge between the second half hoop 502 and the first half hoop 501 to close the two, and a shift block 503 is provided on the outer side of the second half hoop 502.

[0070] In a further embodiment, Figure 2 , 14 As shown in Figures 15, the sealing detection component 700 includes a ring sleeve 701 made of a transparent material, the ring sleeve 701 is threadedly installed at the sealing detection port 603 on the outer side of the upper shell 601, a sealing gasket 706 is matched between one end of the ring sleeve 701 and the upper shell 601, and a clamping ring 709 is provided at the other end of the ring sleeve 701 through bolts, and a waterproof breathable membrane 708 is clamped between the clamping ring 709 and the end face of the ring sleeve 701, a piston 704 is slidably provided in the ring sleeve 701, and a sealing ring 705 that seals with the wall of the ring sleeve 701 is provided on the piston 704, and both ends of the piston 704 are connected to the limit ring 702 on the inner wall of the ring sleeve 701 through pressure springs 707, and a position marking ring 703 indicating the position of the piston 704 is provided on the outer wall of the ring sleeve 701.

[0071] In a further embodiment, Figure 1 , 2 As shown, the upper shell 601 is made of transparent material.

[0072] In a further embodiment, Fig.11 As shown, a sheath 805 is provided in the second slot 411 to cover and protect the fusion joint of the fiber core 804 of the optical cable 801, and two protective steel needles 806 are provided on the wall of the sheath 805, which are distributed at 180 degrees in the circumference and prevent the hinge point of the fiber core 804 from bending.

[0073] The fiber splicing assembly 400 in the lower shell assembly 100 of the present invention performs a one-time operation to cut the fiber core 804 on the same side to equal length when performing the fiber splicing of the fiber core 804 of the optical cable 801, so that the cutting work before the fiber core 804 is more convenient and simple, and there is no need to cut all the fiber cores 804 one by one, thereby improving the efficiency of the fiber splicing and fiber core 804 cutting of the optical cable 801. The second elastic strip 408 of the fiber splicing assembly 400 of the present invention can be wound around a longer core fiber 802 because its diameter can be adjusted, so that the core fiber 802 can be smoothly repaired and spliced ​​after its fusion point is damaged. The fiber splicing assembly 400 of the present invention can directly wind and splice the fiber core 804, without the need for the complex operation of the fiber splicing and maintenance of the fiber splicing tray in the traditional joint box by flipping open, effectively improving the efficiency of the fiber core 804 splicing and installation and maintenance of the optical cable 801. The upper shell component 600 in the present invention is made of transparent plastic material, and the internal fiber core 804 fusion point is close to the upper shell 601 after the upper shell 601 and the lower shell 101 are closed, so the state of the internal fusion point can be visually observed, the fault point can be quickly located, and maintenance is convenient and fast. The second elastic strip 408 in the fiber fusion component 400 of the present invention performs a single-turn winding and storage of the fiber core 804 through the clamp component 500 thereon and can keep the fiber core 804 with sufficient looseness under the winding condition, so as not to be too tight or too loose, and effectively limit the vibration and pulling of the fiber core 804 when the upper shell 601 and the lower shell 101 are hit, and then the wall fiber core 804 is broken and damaged at the fusion point due to pulling, and at the same time, it is ensured that the conduction capacity of the fiber core 804 is not limited by vibration and pulling, and has a relatively stable attenuation performance. The sealing detection component 700 in the present invention can intuitively observe visually whether the upper shell 601 and the lower shell 101 in the closed state are in an effective sealing state. If the upper shell 601 and the lower shell 101 in the closed state are in an effective sealing state, the piston 704 in the sealing detection component 700 will move to a certain extent when the external temperature and air pressure change. If the seal in the upper shell 601 and the lower shell 101 in the closed state fails, the piston 704 in the sealing detection component 700 will eventually be flush with the position marking ring 703 on the outside of the ring sleeve 701 under the action of the air pressure balance on both sides and the two pressure springs 707, thereby effectively improving the efficiency of sealing detection. In the sealing detection component 700 of the present invention, the first elastic strip 407 and the second elastic strip 408 for fixing the fusion point of the fiber core 804 will undergo a certain elastic movement when the upper shell 601 is impacted, so that the fusion point of the fiber core 804 can avoid the impact vibration transmitted from the upper shell 601 and play a certain degree of buffering effect on the vibration, thereby ensuring that the transmission performance of the fiber core 804 is basically not affected.

[0074] The use principle of the present invention is as follows:

[0075] In the initial state, the upper shell 601 and the lower shell 101 are in an open state, the exposed length of all the first elastic strips 407 in the fiber splicing assembly 400 is equal to the circular radius of the second elastic strips 408, the distance between the middle of each first elastic strip 407 and the first arc plate 401 is the largest, both ends of the second elastic strip 408 are fixed to the second arc plate 405 by bolts, and the first half hoop 501 and the second half hoop 502 in the clamp assembly 500 on both sides of each second elastic strip 408 are in a closed state. The piston 704 in the sealing detection assembly 700 on the upper shell 601 is located at the center between the two limit rings 702 under the action of the two pressure springs 707, and one end of the piston 704 is flush with the position marking ring 703 on the outside of the ring sleeve 701.

[0076] The process of installing the fusion-splicing optical cable 801 using the present invention is as follows:

[0077] Three pairs of 24-core optical cables 801 are respectively inserted into the lower shell 101 from the three pairs of sealing sleeves 106 at both ends of the lower shell 101, and the two first clamping assemblies 200 clamp and fix the three optical cables 801 at the corresponding ends with bolts, which can prevent the optical cables 801 from moving relative to the lower shell 101 under the action of external force, so that the optical cables 801 and the lower shell 101 are relatively fixed. After entering the lower housing 101, each optical cable 801 is peeled according to the required length, so that the four core fibers 802 and the protective steel wire 803 in the optical cable 801 are exposed, and the protective steel wire 803 in each optical cable 801 is inserted into the round hole on the corresponding fixing column 301 and is tightened and fixed by the corresponding locking screw 302. The two second clamping assemblies 300 clamp and fix the core fibers 802 of the three optical cables 801 at the corresponding end, and the first clamping block 305 on the first clamping strip 303 in the second clamping assembly 300 and the second clamping block 309 on the second clamping strip 307 are in a closed and locked state.

[0078] The diameter of the ring formed by all the second elastic strips 408 is adjusted as required, and the process is as follows:

[0079] Loosen the bolts fixing the two ends of the second elastic strip 408, move the two ends of the second elastic strip 408 so that the diameter of the ring formed by the second elastic strip 408 changes to the desired size, and then fix the second elastic strip 408 to the second arc plate 405 by bolts, thereby completing the adjustment of the diameter of the ring formed by the second elastic strip 408.

[0080] like Figure 8 , 11As shown, after the diameters of all the second elastic strips 408 are adjusted, the 12 pairs of exposed core fibers 802 in the three pairs of optical cables 801 are respectively passed through the clamp assemblies 500 on both sides of the corresponding second elastic strips 408 along the circle of the second elastic strips 408 to the vicinity of the arc sleeve 410 at the upper end and further peeled, so that 6 pairs of fiber cores 804 in the two core fibers 802 are exposed and all the fiber cores 804 are cut to equal lengths as needed, and a sheath 805 is put on each of the pair of fiber cores 804 corresponding to each second elastic strip 408, and then the corresponding pair of fiber cores 804 are fused. After the fusion is completed, the sheath 805 is moved to the fusion point to form a protection for the fusion point, and the fusion point protected by the sheath 805 is pressed into the corresponding second slot 411 on the corresponding arc sleeve 410, so as to keep the pair of core fibers 802 wrapped around the side of the second elastic strip 408 in a properly relaxed state.

[0081] like Fig.13 As shown, after all the fiber cores 804 are fused and fixed, the upper shell 601 is sealed and connected to the lower shell 101 by bolts. During the closing process of the upper shell 601 and the lower shell 101, the upper shell 601 will squeeze the first elastic strips 407 located in the middle, and the curvature of the squeezed first elastic strips 407 is reduced, and the two ends of the first elastic strips 407 simultaneously slide deeply into the two slots 403 at the two ends, so that the exposed length of the first elastic strips 407 is reduced. Fig.18 As shown in (a) and (b), the corresponding second elastic strip 408 changes from a circle to an ellipse under the pressure of the corresponding first elastic strip 407, and the pair of core fibers 802 that have been fused and wound on the second elastic strip 408 undergo corresponding elliptical deformation as the second elastic strip 408 deforms, and the curvature of the deformed core fiber 802 meets the installation requirements. The relaxed winding state of the core fiber 802 on the second elastic strip 408 and the deformation of the second elastic strip 408 from a circle to an ellipse can ensure that the core fiber 802 will not be excessively relaxed or excessively tightened during the closing process of the upper shell 601 and the lower shell 101, thereby protecting the core fiber 802 of the optical cable 801 from being pulled and disconnected from the fusion point.

[0082] The elastic changes of the first elastic strip 407 and the second elastic strip 408 in the fiber splicing assembly 400 can enable the fiber splicing assembly 400 to effectively adapt to the space changes in the upper shell 601 and the lower shell 101. At the same time, the fiber splicing assembly 400 can avoid the shortcomings of inconvenient maintenance and cumbersome operation of the multi-layer fiber splicing tray in the traditional joint box.

[0083] When a certain optical cable 801 needs to be welded for the second time, the welding point of the optical cable 801 that needs to be welded for the second time is cut off, and a new optical cable 801 is replaced to match the existing optical cable 801. Then, the exposed fiber core 804 of the optical cable 801 is re-cut. Since the length of the fiber core 804 of the existing optical cable 801 is limited, the radius of the corresponding second elastic strip 408 needs to be reduced by a certain amount so that the end of the exposed fiber core 804 of the optical cable 801 has sufficient free length for cutting and welding. Since the radius of the circular ring formed by the second elastic strip 408 to form a circular winding support for the corresponding pair of fiber cores 804 can be adjusted, the fiber core 804 on the second elastic strip 408 can be subjected to subsequent secondary welding multiple times as required until the free length of the end of the fiber core 804 at the upper end of the second elastic strip 408 does not meet the required position.

[0084] Adjustment of the diameter of the ring formed by a single second elastic strip 408 does not affect the protective fixation of the corresponding fiber core 804 fusion points by other second elastic strips 408 .

[0085] If the piston 704 in the sealing detection assembly 700 on the wall of the upper shell 601 moves and is not flush with the position marking ring 703 on the ring sleeve 701 when the outside temperature changes due to day and night changes, then it means that the air pressure on both sides of the piston 704 changes to produce an air pressure difference, and the air pressure in the space between the upper shell 601 and the lower shell 101 is constant. It also means that the space between the upper shell 601 and the lower shell 101 in the closed state is in a good sealing state, and the second sealing strip 604 of the upper shell 601 and the first sealing strip 104 of the lower shell 101 are well sealed. If the piston 704 in the sealing detection assembly 700 on the wall of the upper shell 601 does not move when the outside temperature changes due to the change of day and night, but is always flush with the position marking ring 703 on the ring sleeve 701, then it means that the air pressure in the space between the upper shell 601 and the lower shell 101 is always balanced with the outside environment pressure, which further indicates that the seal between the upper shell 601 and the lower shell 101 in the closed state fails, and the sealing fit between the second sealing strip 604 of the upper shell 601 and the first sealing strip 104 of the lower shell 101 is poor, so it can be guessed that The second sealing strip 604 of the upper shell 601 and the first sealing strip 104 of the lower shell 101 may be aged. At this time, by further tightening the bolts connecting the upper shell 601 and the lower shell 101, the second sealing strip 604 of the upper shell 601 can be further penetrated into the second sealing groove 105 of the first sealing strip 104 of the lower shell 101 and the first sealing strip 104 can be further squeezed, so that the second sealing strip 604 and the first sealing strip 104 form a temporary effective sealing fit, providing sufficient time for replacing the first sealing strip 104 and the second sealing strip 604.

Claims

1. A mobile joint box for optical cable fusion splicing, characterized in that: include: A lower shell assembly is used for fusing optical cables, the lower shell assembly includes a lower shell, both ends of the lower shell are provided with a first clamping assembly for protectively fixing three 24-core optical cables at the corresponding ends, both ends of the lower shell are provided with a second clamping assembly for protectively fixing the exposed core fibers of the three optical cables at the corresponding ends, the lower shell is provided with a fiber fusion assembly for protectively fixing the fusion points of the three pairs of optical cables at the two ends, the fiber fusion assembly includes a first arc plate whose axis is parallel to the length direction of the lower shell, an active groove is provided on the arc surface of the first arc plate, and twelve pairs of Slots are evenly distributed around the axis of the first arc plate, and each pair of the slots is inserted with an upwardly arched first elastic strip. A second arc plate is provided in the middle of the movable groove, and a plurality of annular second elastic strips corresponding to the first elastic strips and having adjustable diameters are provided on the second arc plate. A plurality of clamp assemblies are provided on both sides of the second elastic strip to make the corresponding pair of core fibers bend along the second elastic strips. The second elastic strip is fixedly connected to the middle of the corresponding first elastic arc plate through an arc sleeve, and six second clamping grooves are provided on the top arc surface of the arc sleeve to protect and fix six fusion points of the corresponding pair of core fibers; The upper shell assembly is used to seal and protect the fusion point of the optical cable. The upper shell assembly includes an upper shell that is sealed with the lower shell. A sealing detection assembly is provided on the shell wall of the upper shell for visually monitoring the sealing performance of the closed upper shell and lower shell.

2. A mobile joint box according to claim 1, characterized in that: Three first wire grooves cooperating with optical cables are provided at both ends of the lower shell body, and rubber sealing sleeves cooperating with optical cables are arranged in the first wire grooves. A first sealing groove connected with the first wire grooves is provided at the edge of the upper end surface of the lower shell body, and a first sealing strip sealingly connected with the sealing sleeve and cooperating with the upper shell body is arranged in the first sealing groove.

3. A mobile joint box according to claim 2, characterized in that: Both ends of the upper shell body are provided with three second wire grooves which correspond one-to-one to the first wire grooves at the corresponding ends and cooperate with the corresponding sealing sleeves. A circle of second sealing strips is arranged at the edge of the lower end surface of the upper shell body. The cross-section of the lower end of the second sealing strip is a sharp angle, and the sharp angle of the lower end of the second sealing strip cooperates with the V-shaped second sealing groove at the upper end of the first sealing strip.

4. A mobile joint box according to claim 1, characterized in that: The first clamping assembly includes a first clamping plate, which is arranged on the outer side of the corresponding end of the lower shell body, and is provided with three semicircular grooves cooperating with the optical cables. The first clamping plate is connected with three second clamping plates by bolts, which press and fix the three optical cables at the corresponding ends to the corresponding semicircular grooves on the first clamping plate respectively, and the second clamping plate is provided with semicircular grooves cooperating with the corresponding optical cables.

5. The mobile joint box according to claim 1, characterized in that: The second clamping assembly includes three fixing posts corresponding to the three optical cables at the corresponding ends and a first clamping strip, the fixing posts being fixed at the first wire groove in the lower shell body, the side wall of the fixing posts being provided with a round hole for inserting the protective steel wire in the corresponding optical cable, the top threaded hole of the fixing posts being threadedly installed with a locking screw for pressing the protective steel wire in the round hole, the first clamping strip being fixed in the lower shell body through two supporting posts, one end of the first clamping strip being hingedly connected to the second clamping strip, the upper side surface of the first clamping strip and the lower side surface of the second clamping strip being provided with three first clamping grooves for fixing the core fiber in the optical cable, the movable end of the second clamping strip being connected to the second clamping block through an elastic strip, the second clamping block being matched with the first clamping block at the corresponding end of the first clamping strip, and the first clamping block being provided with two inclined surfaces distributed up and down and matching with the second clamping block.

6. A mobile joint box according to claim 1, characterized in that: Both ends of the second elastic strip are provided with a plurality of positioning holes distributed along the length direction thereof, the second arc plate is provided with 12 groups of locking screw holes corresponding one-to-one to the second elastic strips, the inner threads of the locking screw holes are provided with bolts matching the positioning holes on the corresponding second elastic strips, four connecting sleeves corresponding one-to-one to the countersunk holes on the inner arc surface of the first arc plate are symmetrically arranged, and the connecting sleeves are connected to the mounting sleeve in the lower shell body through the bolts in the corresponding countersunk holes.

7. The mobile joint box according to claim 1, characterized in that: The clamp assembly includes a first half hoop, which is fixed to the side of the second elastic strip, and a second half hoop is hinged at one end of the first half hoop. A spiral spring is provided at the hinge between the second half hoop and the first half hoop to close the two, and a shift block is provided on the outer side of the second half hoop.

8. The mobile joint box according to claim 1, characterized in that: The sealing detection assembly includes a ring sleeve made of transparent material, the ring sleeve is threadedly installed at the sealing detection port on the outer side of the upper shell body, a sealing gasket is matched between one end of the ring sleeve and the upper shell body, a clamping ring is provided at the other end of the ring sleeve through bolts, a waterproof and breathable membrane is clamped between the clamping ring and the end face of the ring sleeve, a piston is slidably provided in the ring sleeve, a sealing ring that seals with the wall surface of the ring sleeve is provided on the piston, both ends of the piston are connected to the limit rings on the inner wall of the ring sleeve through pressure springs, and a position marking ring indicating the position of the piston is provided on the outer wall of the ring sleeve.

9. The mobile joint box according to claim 1, characterized in that: The upper shell is made of transparent material.

10. The mobile joint box according to claim 1, characterized in that: The second card slot is provided with a sheath for covering and protecting the fiber core fusion point of the optical cable, and the wall surface of the sheath is provided with two protective steel needles which are distributed at 180 degree intervals in the circumferential direction and prevent the hinge point of the fiber core from bending.

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