CN106918888B - Port sealing device for optical cable joint box - Google Patents
Port sealing device for optical cable joint box Download PDFInfo
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- CN106918888B CN106918888B CN201710301757.8A CN201710301757A CN106918888B CN 106918888 B CN106918888 B CN 106918888B CN 201710301757 A CN201710301757 A CN 201710301757A CN 106918888 B CN106918888 B CN 106918888B
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- sealing
- sleeve
- cable
- optical cable
- connecting sleeve
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4441—Boxes
- G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Cable Accessories (AREA)
Abstract
The invention relates to a port sealing device for an optical cable joint box, wherein at least two cable feeding pipes are arranged at two ends of a lower wallboard at the bottom of the box, an elastic sealing sleeve, a secondary sealing connecting piece and a connecting cap are arranged on each cable feeding pipe, the elastic sealing sleeve can be used for sealing and fixing an optical cable, an inner thread section and a ring table surface at the rear part are arranged in a hole of the inner connecting sleeve of the secondary sealing connecting piece, an outer thread and a variable diameter part which is arranged outside the outer thread and formed by a plurality of axial notches are arranged at the periphery of the outer connecting sleeve, the elastic sealing sleeve is hermetically arranged in the hole of the cable feeding pipe, the inner connecting sleeve of the secondary sealing connecting piece is screwed on the cable feeding pipe, the outer ring edge of the elastic sealing sleeve is extruded between the end face of the cable feeding pipe and the ring table surface of the inner connecting sleeve, and the connecting cap is screwed on the outer connecting sleeve and radially contracted to be wrapped on the optical cable in a sealing and fixing mode. The invention has reasonable structure, simple assembly, and better air tightness, and can realize multistage sealing protection for the incoming optical cable.
Description
Technical Field
The invention relates to a port sealing device for an optical cable joint box, and belongs to the technical field of optical fiber wiring of optical communication transmission.
Background
Currently, optical fiber cables have been developed as the primary transmission means for various communication networks. The transmission capacity is large, the transmission speed is high, the anti-interference capability is strong, the volume is small, the weight is light, and the like, so that the transmission device can enter the field of vision of the masses step by step.
With the continuous and deep information construction, the optical fiber access network is constructed well. How to reasonably design and select optical cable transmission and distribution equipment according to the network structure planning and the actual conditions of engineering construction is a problem considered in the decision of engineering construction schemes by the current full-enterprise communication operation departments and manufacturing research and development departments. The safest network guarantee, the most economical construction scheme, the low-cost construction of the whole network, the network connection expansion and the like are important matters in the design and construction of the optical fiber access network. The network structure of the optical fiber access network needs to meet the requirements in two aspects at the same time: the first optical fiber network provides flexible and reliable physical connection for the upper access equipment, can adapt to networking requirements of various topological structures, such as tree, star, ring and the like, and provides uniform bearing for various service requirements. Secondly, at the access network level, the demands of users are rich and various, and the users have quick changes and large uncertainty. In this regard, the optical fiber access network needs to reference the traditional copper cable network architecture, adopts a layering concept, divides the access network into a main body part (such as a trunk optical cable) and a peripheral part (such as a lead-in optical cable), realizes the operational, manageable and sustainable development of the network by keeping the relative stability of the main body part, adapts to the uncertainty of the end user by flexible deployment and quick response of the peripheral part, and realizes flexible access.
The optical cable joint box is an optical communication terminal device widely applied to optical fiber fusion, distribution, scheduling and test among optical fiber access network optical cables, is a junction for signal transmission, scheduling and conversion among optical signal receiving and transmitting devices, and has the functions of scheduling, switching and the like of optical signals. The optical cable connector box disclosed in CN 104238056A comprises a box bottom and a box cover, wherein a plurality of welding discs are arranged on the box bottom, holes are formed in two ends of the connector box, an annular conjoined sealing ring is arranged between the box bottom and the box cover, the box cover and the box bottom are mechanically sealed through fastening components, sealing upper covers are respectively arranged above two ends of the conjoined sealing ring, two optical cable holes are formed below the sealing upper covers and the ends of the conjoined sealing ring, a groove is formed in each optical cable hole and is provided with a plastic gasket, a fixing seat is arranged in the box bottom, the cable is fixed through the fixing seat, a long time is required during cable feeding operation, sealing is difficult to ensure after maintenance, and the cable connector box cannot adapt to severe use environments such as pipelines and buried underground.
Disclosure of Invention
The port sealing device for the optical cable joint box is reasonable in structure, simple to assemble and capable of achieving multistage sealing protection on the incoming optical cable.
The technical scheme for achieving the purpose is as follows: a port sealing device for an optical cable junction box, characterized by: the box bottom is provided with at least two cable feeding pipes extending outwards at two ends of the lower wallboard, the cable feeding pipes which are hollow are provided with external threads, each cable feeding pipe is provided with an elastic sealing sleeve, a secondary sealing connecting piece and a connecting cap, the elastic sealing sleeve can be used for sealing and fixing an optical cable, the secondary sealing connecting piece is provided with an inner connecting sleeve and an outer connecting sleeve, an inner thread section and a ring table surface at the rear part are arranged in a hole of the inner connecting sleeve, the outer periphery of the outer connecting sleeve is provided with the external threads and a reducing part which is positioned at the outer side of the external threads and formed by a plurality of axial notches, the elastic sealing sleeve is hermetically arranged in the hole of the cable feeding pipe, the elastic sealing sleeve is provided with a taper hole which is enlarged from inside to outside, the taper hole of the outer connecting sleeve can be compressed and stretched to be connected and sealed with the optical cable, the inner connecting sleeve of the secondary sealing connecting piece is screwed on the cable feeding pipe, the outer ring edge of the elastic sealing sleeve is extruded between the end face of the cable feeding pipe and the ring table surface of the inner connecting sleeve, and the connecting cap is screwed on the outer connecting sleeve and the reducing part is extruded radially to shrink to be wrapped on the optical cable for sealing and fixing.
Wherein: the inner periphery of the elastic sealing sleeve is provided with a conical surface for guiding and at least three annular surfaces with sequentially increasing outer diameters positioned at the rear part of the conical surface, and the elastic sealing sleeve is arranged in the cable inlet pipe and is in sealing connection with the cable inlet pipe.
The outside hole of the cable inlet pipe is internally provided with a step-shaped hole, and each circular ring surface of the elastic sealing sleeve is arranged in the corresponding step-shaped hole of the cable inlet pipe for guiding, sealing and limiting.
The outer periphery of the inner connecting sleeve of the secondary sealing connecting piece is polygonal with more than two sides, the axial notch on the reducing part of the outer connecting sleeve is symmetrically arranged along the circumferential direction, and the axial notch is arranged in parallel along the radial direction or is inclined with the radial direction.
The inner hole diameter of the inner connecting sleeve is larger than that of the outer connecting sleeve.
The port sealing device for the optical cable joint box is characterized in that the lower wallboards at the two ends of the box bottom are provided with the extending integrated cable inlet pipes, so that a main optical cable, a feeder optical cable and a branch optical cable are led into the box body from the cable inlet pipes, each cable inlet pipe is provided with an elastic sealing sleeve, a secondary sealing connecting piece and a connecting cap, wherein the elastic sealing sleeve can be disassembled and assembled and used for sealing and fixing the optical cable, the elastic sealing sleeve is hermetically arranged in the cable inlet pipe, and the elastic sealing sleeve can be compressed and stretched in the diameter direction through a taper hole which is formed by expanding the elastic sealing sleeve from inside to outside, so that when optical cables with different diameters enter the box body, the compression amount of the elastic sealing sleeve can be adjusted, and good sealing can be formed with the optical cable. The secondary sealing connecting piece is provided with the inner connecting sleeve and the outer connecting sleeve, the inner threaded section and the annular table top are arranged in the hole of the inner connecting sleeve, when the secondary sealing connecting piece is screwed on the cable inlet pipe, the outer annular edge of the elastic sealing sleeve can be extruded between the end face of the cable inlet pipe and the annular table top of the inner connecting sleeve, and the end face sealing is realized, so that the sealing performance can be enhanced. The variable diameter part formed by the plurality of axial notches on the outer side of the external thread is arranged on the outer connecting sleeve of the secondary sealing connecting piece, the connecting cap is screwed on the outer connecting sleeve, the variable diameter part of the outer connecting sleeve of the secondary sealing connecting piece can be extruded, the outer side of the secondary sealing connecting piece is reduced inwards to ensure that the diameter of a cable inlet is reduced, and the cable inlet is wrapped on an optical cable for sealing and fixing, so that the outermost sealing protection is formed. The port sealing device has reasonable structure, better air tightness, optical cable fusion and divergence protection function, simple assembly, convenient operation and rapid service response, and is suitable for various severe environments such as water immersion, high temperature, humidity, strong ultraviolet rays and the like.
Drawings
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic perspective view of a port seal of the present invention mounted on a cartridge.
Fig. 2 is a schematic cross-sectional view of a port seal of the present invention.
Fig. 3 is a schematic view of the structure of the cable closure with the lid opened.
Fig. 4 is a schematic diagram of the B-direction structure of fig. 3.
Figure 5 is a schematic view of the explosive structure of the elastic sealing sleeve, the secondary sealing connection and the connection cap of the present invention.
Figure 6 is a schematic cross-sectional view of the elastomeric boot seal, secondary seal connection and connection cap of the present invention.
Wherein: 1-connecting cap, 2-secondary sealing connecting piece, 2-1-outer connecting sleeve, 2-21-reducing part, 2-22-axial notch, 2-inner connecting sleeve, 3-box cover, 3-1-lower annular groove, 4-box bottom, 4-1-cable tube, 4-2-lower wallboard, 4-3-upper annular groove, 5-annular buckle, 6-spanner panel, 7-elastic sealing sleeve, 7-1-outer annular edge, 7-2-annular surface, 7-3-conical surface, 7-4-conical hole, 8-prefabricated sealing rubber strip, 9-fastening stud, 10-grounding column, 11-optical cable fusion protection tray and 12-bearing bottom plate.
Detailed Description
Referring to fig. 1-6, the port sealing device for an optical cable joint box of the invention is characterized in that the lower wall plates 4-2 at two ends of the box bottom 4 are provided with at least two outward extending cable feeding pipes 4-1, the box bottom 4 is provided with an arc-shaped bottom plate and four lower wall plates 4-2 integrated with the arc-shaped bottom plate to form a lower cavity for installing an optical cable fixing welding group, the box bottom 4 integrally forms an operation space for optical cable welding wiring, a hexahedral closed space is formed inside the box bottom after the box bottom is attached to the box cover 3, the cable feeding pipes 4-1 and the box bottom 4 are of an integrated structure, a main optical cable, a feeder optical cable and a split optical cable can enter the box body from the cable feeding pipes 4-1, the hollow cable feeding pipes 4-1 are provided with external threads, and an elastic sealing sleeve 7, a secondary sealing connecting piece 2 and a connecting cap 1 which can be used for sealing and fixing the optical cable are arranged on each cable feeding pipe 4-1.
As shown in fig. 1 to 6, the secondary sealing connection member 2 of the present invention has an inner connection sleeve 2-2 and an outer connection sleeve 2-1, the hole of the inner connection sleeve 2-2 has an inner thread section and a ring table surface at the rear, while the outer circumference of the outer connection sleeve 2-1 is provided with an outer thread and a diameter-variable portion 2-21 formed by a plurality of axial slots 2-22 located outside the outer thread, the inner diameter of the inner connection sleeve 2-2 of the secondary sealing connection member 2 is larger than the inner diameter of the outer connection sleeve 2-1, the outer circumference of the inner connection sleeve 2-2 of the secondary sealing connection member 2 is a polygon with two or more sides, such as a hexagon, and the thread on the inner connection sleeve 2-2 is screwed on the cable feeding pipe 4-1 by hand screwing and tool operation.
As shown in fig. 1 to 6, the elastic sealing sleeve 7 of the invention is arranged in the hole of the cable inlet tube 4-1 in a sealing way, the elastic sealing sleeve 7 is provided with a taper hole 7-4 which is enlarged from inside to outside, the elastic sealing sleeve 7 adopts a compressible and stretchable rubber piece, the taper hole 7-4 can be compressed and stretched and is sealed with an optical cable, so that the elastic sealing sleeve 7 can be compressed and stretched in the radial direction and the axial direction, and the first-stage sealing protection of the optical cable is realized by adjusting the compression amount of the optical cable after the optical cable with different diameters passes through the taper hole 7-4 of the elastic sealing sleeve 7. As shown in fig. 1 to 6, an inner connecting sleeve 2-2 of a secondary sealing connecting piece 2 is connected to an outer connecting sleeve 2-1 in a rotating mode, an outer annular edge 7-1 of an elastic sealing sleeve 7 is extruded between the end face of the cable feeding tube 4-1 and an annular table face of the inner connecting sleeve 2-2, the inner diameter of the elastic sealing sleeve 7 is sealed with an optical cable, meanwhile, the outer annular edge 7-1 of the elastic sealing sleeve 7 enables the cable feeding tube 4-1 and the secondary sealing connecting piece 2 to achieve secondary sealing protection, and a connecting cap 1 is connected to the outer connecting sleeve 2-1 in a rotating mode and extrudes a diameter-changing portion 2-21 to shrink radially to be wrapped on the optical cable for sealing and fixing. The periphery of the connecting cap 1 is polygonal and is like a regular hexagon, so that the connecting cap is convenient to install on the secondary sealing connecting piece 2, when the connecting cap 1 is screwed on the outer connecting sleeve 2-1, the diameter-changing part 2-21 of the secondary sealing connecting piece 2 is extruded, the diameter of a cable inlet is reduced inwards, the outermost sealing protection is formed, a plurality of multi-stage protection effects of wrapping the optical cable at multiple positions and compressing inwards are formed through the port sealing device, and the protection performance of the optical cable connector box reaches the IP68 level.
As shown in fig. 4 to 6, the axial notch 2-22 on the variable diameter portion of the outer connecting sleeve 2-1 of the present invention is symmetrically arranged along the circumferential direction, and the axial notch 2-22 along the circumferential direction is arranged in parallel along the radial direction or is arranged in an inclined plane with the radial direction, the inclined plane may be a plane or an arc surface, and when the diameter of the cable inlet is reduced inwards by the variable diameter portion 2-21, the tooth portion formed by the variable diameter portion compresses the optical cable to realize end sealing and fixing.
As shown in fig. 2, 5 and 6, the inner periphery of the elastic sealing sleeve 7 of the invention is provided with a conical surface 7-3 for guiding and at least three annular surfaces 7-2 with sequentially increasing outer diameters positioned at the rear part of the conical surface 7-3, the structure of the conical surface 7-3 is beneficial to the integral pushing of the elastic sealing sleeve 7 into the hole of the cable inlet tube 4-1 of the box bottom 4, and the rear part extends to form a plurality of cylindrical surfaces by steps, so that the annular surfaces 7-2 of the elastic sealing sleeve 7 are in sealing connection with the inner hole of the cable inlet tube 4-1. As shown in fig. 5 and 6, the outside hole of the cable feeding pipe 4-1 is internally provided with a step hole, each annular surface 7-2 of the elastic sealing sleeve 7 is arranged in the corresponding step hole of the cable feeding pipe 4-1 to conduct guiding, sealing and limiting functions, the small annular surface 7-2 is used for guiding, the middle annular surface 7-2 is used for sealing, the largest annular surface 7-2 is used for limiting and further sealing, and the cable feeding pipe is convenient to install and can also conduct sealing protection on an incoming cable.
As shown in fig. 1 to 6, the incoming optical cable is inserted into the box body from the hole of the cable inlet tube 4-1 of the box bottom 4, the optical cable is stripped for a certain length, the optical cable of the un-stripped part is fixed at the T-shaped buckle position of the bearing bottom plate 12 through the throat hoop, the metal reinforcing core in the stripped optical cable passes through the hole of the grounding post 10 and is fixed by the fixing stud 9, the stripped optical cable enters the welding disc of the optical cable welding protection tray 11 to be welded, after the optical cable circuit is welded, the elastic sealing sleeve 7 is sleeved on the optical cable of the un-stripped part and is pushed into the hole of the cable inlet tube 4-1, the secondary sealing connecting piece 2 is screwed on the cable inlet tube 4-1 to squeeze the elastic sealing sleeve 7, the elastic sealing sleeve 7 is radially changed to seal with the cable inlet tube 4-1 and the optical cable, and the end face of the cable inlet tube 4-1 is sealed with the secondary sealing connecting piece 2, the connecting cap 1 is screwed on the outer connecting sleeve 2-1 of the secondary sealing connecting piece 2, the diameter-variable part 2-21 of the secondary sealing connecting piece 2 is extruded to reduce the diameter of a cable inlet inwards, the multi-stage sealing and fixing effect on the incoming cable are realized, the displacement and damage of the welding interface of the internal cable are not influenced by external activities, the lower annular groove 3-1 of the box cover 3 is aligned with the prefabricated sealing adhesive tape 8 arranged in the upper annular groove 4-3 of the box bottom 4, the box cover 3 is closed, the lower flange on the box cover 3 and the upper flange on the box bottom 4 are connected through a fastener, or as shown in figure 1, two mutually meshed components are formed by adopting a spanner finger panel 6 and an annular buckle 5 arranged on the box cover 3 and the box bottom 4, the spanner finger panel 6 hinged on the box cover 3 is moved, the lower annular edge of the annular buckle 5 is sleeved on the buckle seat of the box bottom 4 and positioned at the bottom of the upper flange, the upper annular edge of the annular buckle 5 is arranged in a locking clamping groove on the spanner panel 6, and the lower annular edge applies a pressing force to the upper flange of the box bottom 4, so that the prefabricated sealing rubber strip 8 is pressed and connected in the lower annular groove 3-1 of the box cover 3 and the upper annular groove 4-3 of the box bottom 4, a sealing environment is formed in the box body, and the quality of the optical cable line connector is ensured.
Claims (5)
1. A port sealing device for an optical cable junction box, characterized by: the lower wall plates (4-2) at the two ends of the box bottom (4) are provided with at least two cable feeding pipes (4-1) which extend outwards, the hollow cable feeding pipes (4-1) are provided with external threads, each cable feeding pipe (4-1) is provided with an elastic sealing sleeve (7) which can be used for sealing and fixing an optical cable, a secondary sealing connecting piece (2) and a connecting cap (1), the secondary sealing connecting piece (2) is provided with an inner connecting sleeve (2-2) and an outer connecting sleeve (2-1), the hole of the inner connecting sleeve (2-2) is internally provided with an internal thread section and a ring table surface at the rear part, the periphery of the outer connecting sleeve (2-1) is provided with external threads and a diameter-changing part (2-21) which is positioned outside the external threads and is formed by a plurality of axial notches (2-22), the elastic sealing sleeve (7) is arranged in the hole of the cable feeding pipe (4-1) in a sealing way, the elastic sealing sleeve (7) is provided with a taper hole (7-4) which is internally and externally expanded, the taper hole (7-4) of the elastic sealing sleeve (7) can be connected with the optical cable in a compression way, the inner connecting sleeve (2-2) of the secondary sealing connecting piece (2) is screwed on the cable inlet pipe (4-1) and extrudes the outer annular edge (7-1) of the elastic sealing sleeve (7) between the end face of the cable inlet pipe (4-1) and the annular table surface of the inner connecting sleeve (2-2), and the connecting cap (1) is screwed on the outer connecting sleeve (2-1) and extrudes the diameter-variable part (2-21) to shrink radially to wrap the optical cable for sealing and fixing.
2. The port sealing device for a fiber optic cable closure of claim 1, wherein: the inner periphery of the elastic sealing sleeve (7) is provided with a conical surface (7-3) for guiding and at least three annular surfaces (7-2) with sequentially increasing outer diameters positioned at the rear part of the conical surface (7-3), and the elastic sealing sleeve (7) is arranged in the cable inlet tube (4-1) and is in sealing connection with the cable inlet tube (4-1).
3. The port sealing device for a fiber optic cable closure of claim 2, wherein: the outside hole of the cable inlet pipe (4-1) is internally provided with a step hole, and each annular surface (7-2) of the elastic sealing sleeve (7) is arranged in the corresponding step hole of the cable inlet pipe (4-1) for guiding, sealing and limiting.
4. The port sealing device for a fiber optic cable closure of claim 1, wherein: the periphery of the inner connecting sleeve (2-2) of the secondary sealing connecting piece (2) is polygonal with more than two sides, the axial notch (2-22) on the reducing part (2-21) of the outer connecting sleeve (2-1) is symmetrically arranged along the circumferential direction, and the axial notch (2-22) is arranged in parallel along the radial direction or is inclined with the radial direction.
5. The port sealing device for a fiber optic cable closure of claim 1, wherein: the inner hole diameter of the inner connecting sleeve (2-2) is larger than that of the outer connecting sleeve (2-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301757.8A CN106918888B (en) | 2017-05-02 | 2017-05-02 | Port sealing device for optical cable joint box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301757.8A CN106918888B (en) | 2017-05-02 | 2017-05-02 | Port sealing device for optical cable joint box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106918888A CN106918888A (en) | 2017-07-04 |
| CN106918888B true CN106918888B (en) | 2023-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710301757.8A Active CN106918888B (en) | 2017-05-02 | 2017-05-02 | Port sealing device for optical cable joint box |
Country Status (1)
| Country | Link |
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| CN (1) | CN106918888B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990158A (en) * | 2017-11-27 | 2018-05-04 | 安徽文尧智能光电科技有限公司 | A kind of luminescence unit of LED line light source |
| CN113555271B (en) * | 2021-05-21 | 2024-04-19 | 闫琪明 | Sealing waterproof device for photomultiplier |
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| CN101271182A (en) * | 2007-03-22 | 2008-09-24 | 茹志康 | Joint box sealing device adopting screw cap rotating impacted sealing ring automatic enclasping optical fibre cable |
| CN104238056A (en) * | 2014-09-24 | 2014-12-24 | 昆山市大唐通讯设备有限公司 | Cable splice closure with both ends mechanically sealed |
| CN104765112A (en) * | 2014-11-17 | 2015-07-08 | 宁波余大通信技术有限公司 | Double-sealing optical cable joint box |
| WO2015120901A1 (en) * | 2014-02-14 | 2015-08-20 | Prysmian S.P.A. | A port sealing device and assembly for an optical cable termination box |
| CN206002739U (en) * | 2016-08-31 | 2017-03-08 | 南通鸿威特种金属制造有限公司 | Ocean cable splice closure |
| CN206804944U (en) * | 2017-05-02 | 2017-12-26 | 常州太平通讯科技有限公司 | A kind of port sealing device for cable splice closure |
-
2017
- 2017-05-02 CN CN201710301757.8A patent/CN106918888B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271182A (en) * | 2007-03-22 | 2008-09-24 | 茹志康 | Joint box sealing device adopting screw cap rotating impacted sealing ring automatic enclasping optical fibre cable |
| WO2015120901A1 (en) * | 2014-02-14 | 2015-08-20 | Prysmian S.P.A. | A port sealing device and assembly for an optical cable termination box |
| CN104238056A (en) * | 2014-09-24 | 2014-12-24 | 昆山市大唐通讯设备有限公司 | Cable splice closure with both ends mechanically sealed |
| CN104765112A (en) * | 2014-11-17 | 2015-07-08 | 宁波余大通信技术有限公司 | Double-sealing optical cable joint box |
| CN206002739U (en) * | 2016-08-31 | 2017-03-08 | 南通鸿威特种金属制造有限公司 | Ocean cable splice closure |
| CN206804944U (en) * | 2017-05-02 | 2017-12-26 | 常州太平通讯科技有限公司 | A kind of port sealing device for cable splice closure |
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| CN106918888A (en) | 2017-07-04 |
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