CN106199878B - Sea-land cable joint box capable of monitoring electrical performance and electrical performance monitoring method thereof - Google Patents
Sea-land cable joint box capable of monitoring electrical performance and electrical performance monitoring method thereof Download PDFInfo
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- CN106199878B CN106199878B CN201610703010.0A CN201610703010A CN106199878B CN 106199878 B CN106199878 B CN 106199878B CN 201610703010 A CN201610703010 A CN 201610703010A CN 106199878 B CN106199878 B CN 106199878B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims description 10
- 230000003287 optical effect Effects 0.000 claims abstract description 94
- 238000007789 sealing Methods 0.000 claims abstract description 56
- 239000000835 fiber Substances 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 69
- 238000010292 electrical insulation Methods 0.000 claims description 18
- 239000004020 conductor Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000012466 permeate Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims 3
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 18
- 239000013307 optical fiber Substances 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/181—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for cables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Cable Accessories (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention provides a sea-land cable joint box capable of monitoring electrical property, which comprises a mechanical protection component, a fiber disc component, a sealing component and a cable inlet; the cable inlet is provided with a land cable inlet, a sea cable inlet and a cable inlet; the mechanical protection assembly comprises a cylinder body and an end cover, and the cable inlet is arranged on the end cover; the connector box further comprises a fixing base arranged on the inner side of the end cover, a steel wire reinforcing core of the fixing piece is electrically connected to the fixing piece after the land optical cable enters the barrel body, an inner armor steel wire of the submarine optical cable is electrically connected to the fixing piece after the submarine optical cable enters the barrel body, a monitoring cable is electrically connected to the fixing piece after the submarine optical cable enters the barrel body, and a grounding terminal for detection is further arranged on the outer wall of the barrel body. The junction box can monitor the sealing performance of the junction box on the premise of not dismounting the junction box, and can monitor the electrical performance of the submarine optical cable and the land optical cable on the premise of not dismounting the junction box, and the improvement of the small structure brings about the functions which cannot be realized by the traditional junction box.
Description
Technical Field
The invention relates to a sea and land cable joint box, in particular to a sea and land cable joint box capable of monitoring electrical performance and an electrical performance monitoring method thereof.
Background
A sea and land cable joint box is needed to be used for connection between submarine optical cable landing and land optical cables, the main components of the sea and land cable joint box comprise a mechanical protection component, a sealing component, a cable inlet and a fiber disc component, the mechanical protection component provides mechanical performance protection for the optical cable joint, the sealing component provides a good watertight environment for the optical cable joint, and the fiber disc component is used for storing the optical fiber joint. The sealing performance of the submarine cable joint box is of vital importance, the current submarine and land cable joint box can only meet the general landing and connection requirements of submarine cables, and the internal electrical performance of the submarine cables cannot be monitored in real time, for example, on the premise of not disassembling the joint box, whether the internal sealing performance of the submarine cable joint box is qualified or not, whether a submarine cable insulating layer connected with the submarine cable joint box is broken down or not, whether a land cable insulating layer connected with the submarine cable joint box is broken down or not and the like are monitored.
Disclosure of Invention
In order to solve the technical problem, the invention provides the sea-land cable joint box capable of monitoring the electrical performance, and the electrical performance in the sea-land cable joint box can be monitored in real time under the condition that the joint box is not disassembled.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a but sea and land cable splice box of monitoring electric property, includes mechanical protection subassembly, sets up the fine dish subassembly that is used for storing fiber splice inside the mechanical protection subassembly, the tip of mechanical protection subassembly is equipped with into cable mouth and seal assembly, its characterized in that:
-said cable entry port having a land cable entry port for the entry of a land optical cable, a sea cable entry port for the entry of a sea cable and a cable entry port for the entry of a monitoring cable;
the mechanical protection assembly comprises a cylinder body and two end covers which are respectively arranged at two ends of the cylinder body in a sealing mode, the outer wall of the cylinder body is provided with a grounding terminal, and the cable inlet is arranged on the end covers;
the connector box also comprises a fixed base arranged on the inner side of the end cover, the fixed base is connected with the end cover, a fixing piece is arranged on the fixed base, the fixing piece is an electric conductor and is arranged between the electric conductor and the barrel in an insulating way, the fixing piece is used for fixing the conductor parts of the land optical cable and the submarine optical cable, the fixing pieces of the land optical cable and the submarine optical cable are respectively and independently arranged and are respectively a land cable fixing piece and a submarine cable fixing piece, a steel wire reinforcing core of the land optical cable is fixed on the land cable fixing piece after the land optical cable enters the barrel, and an inner armor steel wire of the submarine optical cable is fixed on the submarine cable fixing piece after the submarine optical cable enters the barrel;
-the monitoring cable, which has three sets of cores, a first set of cores, a second set of cores and a third set of cores, after entering the inside of the cylinder: the first group of cable cores are fixed on the land cable fixing piece, the second cable cores are fixed on the sea cable fixing piece, and the third group of cable cores are arranged in a suspended manner; the third group of cable cores are provided with a first cable core and a second cable core which are insulated from each other;
the grounding terminal of the outer wall of the barrel body, and the first cable core, the second cable core, the first group of cable cores and the second group of cable cores of the monitoring cable which are retained outside the barrel body form a testing wiring terminal of an external testing system.
In a preferred embodiment of the present invention, the fixing member is a cylindrical structure, two end portions of the fixing member are respectively provided with a fixing hole, which is a first fixing hole and a second fixing hole, an axial middle portion of the fixing member is provided with a first through hole for passing through the conductor portions of the terrestrial optical cable or the submarine optical cable, the first fixing hole is communicated with the first through hole, the first fixing hole cooperates with a fastening member to lock and fix the conductor portions of the terrestrial optical cable or the submarine optical cable that pass through the first through hole, and the first group of cable cores and the second group of cable cores are respectively fixed on the second fixing holes of the respective fixing members.
In a preferred embodiment of the present invention, the fixing base is provided inside the end cap and is engaged with both the land cable fixing member and the submarine cable fixing member, the fixing base is a truncated cone-shaped structure, a groove is provided at the top end of the fixing base, and the land cable fixing member or the submarine cable fixing member is respectively embedded in the groove on the respective fixing base.
In a preferred embodiment of the present invention, the fixing base is made of nylon.
In a preferred embodiment of the present invention, the cable inlet is a step through hole penetrating through the end cap, the step through hole has three steps, which are respectively a first step, a second step and a third step arranged in sequence from outside to inside, the first step, the second step and the third step are respectively a threaded hole, a tapered hole and a through hole concentrically arranged, and a cable core of each cable penetrates into the barrel body from outside to inside and then penetrates out from the third step.
In a preferred embodiment of the present invention, the sealing assembly is inserted into the second step, and includes a sealing gasket, a conical cable sealing ring, and a sealing gasket arranged in sequence from outside to inside.
In a preferred embodiment of the present invention, the cable sealing locking member is disposed in the first step, and the cable sealing locking member presses the sealing assembly to seal and lock each cable after each cable penetrates into the barrel through the cable inlet.
In a preferred embodiment of the present invention, the fiber tray assembly further comprises a tray base, a fiber guide plate and a fiber tray box, wherein the tray base is fixed on the inner side of the end cover, the fiber guide plate is fixed on the tray base, and the fiber tray box is fixed on the fiber guide plate.
In a preferred embodiment of the present invention, the number of the cable inlets is four, and the four cable inlets are respectively a land cable inlet, a sea cable inlet, a cable inlet and a spare cable inlet, and the land cable inlet and the sea cable inlet are respectively arranged on the end covers at two opposite sides.
In order to achieve the purpose, the invention adopts another technical scheme as follows: a method of monitoring electrical properties of a sea and land cable closure according to any one of claims 1 to 9, wherein: (1) when the sealing performance of the joint box is tested, the first cable core and the second cable core respectively form a first connecting terminal and a second connecting terminal of an external test system, the first connecting terminal and the second connecting terminal are electrically connected to the test system to form a test loop, the electrical insulation performance is tested, and if the test result is a great resistance value, the electrical insulation performance of the first cable core and the second cable core is judged to be good, no water permeates into the joint box, and the sealing performance is good; if the test result is a smaller resistance value, the first cable core and the second cable core are judged to have poor electric insulation performance and are conducted, water permeates into the joint box, and the sealing performance is poor;
(2) when the electrical property of the land optical cable is tested, the first group of cable cores and the grounding terminal respectively form a first wiring terminal and a second wiring terminal of an external test system, the first wiring terminal and the second wiring terminal are electrically connected to the test system to form a test loop, and the electrical insulation property is tested; comparing whether the test result meets the technical parameters of the terrestrial optical cable, and if so, judging that the insulating layer of the terrestrial optical cable is not broken and the electrical property is good; if the technical requirements are not met, judging that the insulating layer of the terrestrial optical cable is broken down and the electrical property is poor;
(3) when the electrical property of the submarine optical cable is tested, the second group of cable cores and the grounding terminal respectively form a first wiring terminal and a second wiring terminal of an external test system, the first wiring terminal and the second wiring terminal are electrically connected to the test system to form a test loop, and the electrical insulation property is tested; comparing whether the test result meets the technical parameters of the submarine optical cable, and if so, judging that the insulating layer of the submarine optical cable is not broken down and the electrical property is good; and if the technical requirements are not met, judging that the insulating layer of the submarine optical cable is broken down and the electrical property is poor.
The sea-land cable joint box capable of monitoring the electrical property has the advantages that the monitoring cable transmits information in the joint box to external detection equipment, the electrical property and the sealing property of the joint box can be monitored on the premise that the joint box is not disassembled, meanwhile, the electrical properties of a submarine optical cable and a land optical cable can be monitored on the premise that the joint box is not disassembled, judgment basis is provided for a monitoring system and fault location, and functions which cannot be realized by a traditional joint box are brought by the improvement of a small structure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic longitudinal section of a preferred embodiment of the invention;
FIG. 2 is a cross-sectional schematic view of a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the fastener of the preferred embodiment of the invention;
FIG. 4 is a schematic structural view of a monitoring cable according to a preferred embodiment of the present invention;
FIG. 5 is a schematic diagram of the electrical performance of the test junction box;
FIG. 6 is a schematic diagram of a principle of testing electrical properties of a land cable;
FIG. 7 is a schematic diagram of the principle of testing the electrical properties of an undersea optical fiber cable.
Wherein: 1-monitoring cable, 1 a-first group of cable cores, 1 b-second group of cable cores, 1 c-third group of cable cores, 11 c-first cable cores, 12 c-second cable cores and 3-grounding terminal;
2-cable inlet, 2 a-land cable inlet, 2 b-sea cable inlet, 2 c-cable inlet and 2 d-spare cable inlet;
4-cylinder, 6-end cover, 8-fixed base, 10 a-land cable fixing part, 10 b-sea cable fixing part, 12-first connecting terminal, 14-second connecting terminal, 16 a-first fixing hole, 16 b-second fixing hole, 18-first through hole, 20-second through hole, 22-groove, 24-sealing gasket, 26-conical sealing ring, 28-sealing gasket, 30-cable sealing locking part, 32-tray base, 34-fiber guide plate and 36-fiber box.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1 to 4, in this embodiment, a sea and land cable joint box capable of monitoring electrical performance is disclosed, which includes a mechanical protection component, and a fiber reel component arranged inside the mechanical protection component and used for storing an optical fiber joint, wherein a cable inlet 2 and a sealing component are arranged at an end of the mechanical protection component, and the specific structures of the components are as follows:
the mechanical protection assembly comprises a barrel body 4 and two end covers 6 which are respectively arranged at two ends of the barrel body 4 in a sealing mode, the outer wall of the barrel body 4 is provided with a grounding terminal 3, the barrel body 4 and the end covers 6 are made of stainless steel materials, the mechanical protection assembly has high strength, can resist seawater corrosion, and provides certain pressure resistance and impact protection for the optical fiber connector.
The cable inlets 2 are arranged on the end covers 6, four cable inlets 2 are preferably selected in the invention, and are respectively a land cable inlet 2a for a land optical cable to penetrate, a submarine cable inlet 2b for a submarine optical cable to penetrate, a cable inlet 2c for a monitoring cable to penetrate and a standby cable inlet 2d, of course, more cable inlets 2 can be expanded according to needs in the actual use process, and the submarine cable inlet 2b and the land cable inlet 2a are uniquely arranged on the end covers 6 on the two opposite sides respectively. Specifically, the cable inlet 2 is a step through hole penetrating through the end cover 6, the step through hole is provided with three steps, namely a first step, a second step and a third step which are sequentially arranged from outside to inside, the first step, the second step and the third step are respectively a threaded hole, a conical hole and a through hole which are concentrically arranged, and cable cores of cables penetrate into the barrel 4 from outside to inside and then penetrate out of the third step.
The fiber disc assembly comprises a tray base 32, a fiber guide plate 34 and a fiber disc box 36, the tray base 32 is fixed on the inner side of the end cover 6, the fiber guide plate 34 is fixed on the tray base 32 through screws, the fiber disc box is fixed on the fiber guide plate 34 through screws, the fiber guide plate 34 is made of engineering plastics with excellent insulating property, a guiding effect is provided for bare optical fibers of cables, and the fiber disc box 36 provides a good and safe storage space for the welded optical fibers.
The sealing assembly penetrates through the second section of step and comprises a sealing gasket 24, a conical cable sealing ring 26 and a sealing gasket 28 which are sequentially arranged from outside to inside, the conical cable sealing ring 26 can be replaced by a blind plug, and the sealing assembly provides a good watertight environment for the optical cable joint.
The first section of step is worn to be equipped with cable sealing locking piece 30 in, and one advances cable mouth 2 and corresponds a cable sealing locking piece 30, and each cable is from advancing cable mouth 2 back in penetrating the barrel 4 cable sealing locking piece 30 pressfitting seal assembly is with each cable of sealing lock solid, and the preferred locking spiral shell of cable sealing locking piece 30, its screw hole sealing lock solid each cable of cooperation first section step.
The splice box is still including setting up 6 inboard unable adjustment base 8 of end cover, and unable adjustment base 8 chooses the round platform column structure of nylon material for use, and nylon material insulating nature is good. The inner sides of the two end covers 6 are respectively provided with a fixed base 8, the two fixed bases 8 are respectively used for fixing a land optical cable and a submarine optical cable after each cable enters the barrel 4 and correspond to the two cable inlets 2 formed in one end cover 6, the end part of each fixed base 8 is provided with two second through holes 20, and the second through holes 20 are used for matching with fasteners to limit and fix the fixed bases 8 on the inner sides of the end covers 6 when the second through holes 20 are superposed with the cable inlets 2; the top ends of the two fixing bases 8 are respectively provided with a groove 22, a land cable fixing piece 10a is embedded in one groove 22, a submarine cable fixing piece 10b is embedded in one groove 22, the fixing pieces are electric conductors and are arranged in an insulating mode with the barrel 4, after each cable enters the barrel 4, the land cable fixing piece 10a is used for fixing a land optical cable, and the submarine cable fixing piece 10b is used for fixing a submarine optical cable, specifically, after the land optical cable enters the barrel 4, a steel wire reinforcing core of the land optical cable is fixed on the land cable fixing piece 10a, and after the submarine optical cable enters the barrel 4, an inner armor steel wire of the submarine optical cable is fixed on the submarine cable fixing piece 10 b.
As shown in fig. 4, the monitoring cable 1 has three groups of cable cores, namely a first group of cable cores 1a, a second group of cable cores 1b and a third group of cable cores 1c, and after the monitoring cable 1 enters the cylinder: a first group of cable cores 1a is fixed on a land cable fixing piece 10a, a second cable core 1b is fixed on a submarine cable fixing piece 10b, and a third group of cable cores 1c is arranged in a suspended manner; the third group cable core 1c has a first cable core 11c and a second cable core 12c arranged insulated from each other.
Specifically, as shown in fig. 3, the fixing member is a cylindrical structure, two end portions of the fixing member are respectively provided with a fixing hole, namely a first fixing hole 16a and a second fixing hole 16b, the middle portion of the fixing member in the axial direction is provided with a first through hole 18 for passing through the terrestrial optical cable or the submarine optical cable, the first fixing hole 16a is communicated with the first through hole 18, and the first fixing hole 16a is matched with a fastener to lock and fix the conductor portion of the terrestrial optical cable or the submarine optical cable which passes through the first through hole 18; the fastener of the first fixing hole 16a is preferably a stainless steel screw. The land cable fixing piece 10a and the sea cable fixing piece 10b are conductors, and have conductivity, the conductive parts of the sea cable or the land cable are electrically connected with the fixing piece, after the monitoring cable enters the cylinder 4, the first group of cable cores 1a are fixed on the second fixing hole 16b of the land cable fixing piece 10a, the second group of cable cores 1b are fixed on the second fixing hole 16b of the sea cable fixing piece 10b, the second fixing hole 16b is a screw hole, the conductor parts of the first group of cable cores 1a and the second group of cable cores 1b are bound on the screw of the screw hole, and the first group of cable cores 10a and the land cable are electrically connected after the connection, so that the electrical signals of the land cable entering the cylinder 4 can be collected; the second group of cable cores 10b are electrically connected to the submarine cable for collecting electrical signals of the submarine cable entering the cylinder 4.
After the external electrical property test system is set up: (1) when the sealing performance of the joint box is tested, the first cable core 11c and the second cable core 12c respectively form a first wiring terminal and a second wiring terminal of an external test system, the first wiring terminal and the second wiring terminal are electrically connected to the test system to form a test loop, and the electric insulation performance of the joint box is tested.
(2) When the electrical property of the land optical cable is tested, the first group of cable cores 1a and the grounding terminal 3 respectively form a first wiring terminal and a second wiring terminal of an external test system, the first wiring terminal and the second wiring terminal are electrically connected to the test system to form a test loop, and the electrical insulation property of the land optical cable is tested.
(3) When the electrical property of the submarine optical cable is tested, the second group of cable cores 1b and the grounding terminal 3 respectively form a first wiring terminal and a second wiring terminal of an external test system, the first wiring terminal and the second wiring terminal are electrically connected to the test system to form a test loop, and the electrical insulation property is tested.
Therefore, the sealing performance of the joint box, the electrical performance of the land optical cable and the electrical performance of the submarine optical cable can be monitored in real time on the premise of not disassembling the joint box, and the improvement of the small structure brings functions which cannot be realized by the traditional joint box.
Based on the structure, the installation process of the joint box comprises the following steps:
carrying out adaptation pretreatment on the ends of the submarine optical cable, the land optical cable and the monitoring cable to be spliced: the protective layer of the submarine optical cable needs to be sequentially removed in a segmented mode, the PE layer, the inner armor steel wire layer and the stainless steel pipe are respectively exposed, and only one steel wire is reserved on the inner armor steel wire layer; the protective layer of the land optical cable needs to be removed, and the steel wire reinforced core is exposed; the protective layer of the monitoring cable needs to be removed, and the lead is exposed;
fixing a fixed base 8 on an end cover 6, distributing a cable inlet 2 of each cable, sequentially passing each processed cable through a cable sealing locking piece 30, a sealing gasket 24, a conical cable sealing ring 26, the end cover 6 and the fixed base 8, fixing the fixing piece 10 on the fixed base 8, passing an inner armor steel wire of a submarine optical cable and a steel wire reinforcing core of a land optical cable through corresponding first through holes 18, straightening the steel wire or the steel wire reinforcing core and screwing a fastener of the fixed hole 16 to clamp the steel wire or the steel wire reinforcing core to prevent loosening, and connecting one lead of a monitoring cable with the fastener of the fixed hole 16.
Then install fine board 34, fine dish box 36 in proper order, accomplish the optical fiber fusion to in coiling into fine dish box 36, install the lid of fine dish box 36, pack into barrel 4 with the tray base 32 that installs, lock each cable seal locking piece 30 afterwards, accomplish the integral erection of splice box.
Example two
As shown in fig. 5, in this embodiment, a method for monitoring electrical performance of a junction box in the first embodiment is provided, where a first cable core 11c and a second cable core 12c respectively form a first connection terminal and a second connection terminal of an external test system, the first connection terminal and the second connection terminal are electrically connected to the test system to form a test loop, and an electrical insulation property is tested, and how to test a maximum resistance value is obtained, it is determined that electrical insulation performance of the first cable core and the second cable core is good, no water permeates into the interior of the junction box, and sealing performance is good; if the test result is a smaller resistance value, the first cable core and the second cable core are judged to have poor electric insulation performance and are conducted, water permeates into the joint box, and the sealing performance is poor.
Normally, the first cable core 11c and the second cable core 12c in the cylinder 4 are arranged in an insulating manner, so that the formed test loop is electrically disconnected; if water permeates into the joint box, the water is used as a medium to conduct the first cable core 11c and the second cable core 12c, and a test loop formed by the conduction is electrically conducted.
From this, it can be judged that: how to test the result to be the maximum resistance value, the electric insulation performance of the first cable core and the second cable core is judged to be good, no water permeates into the joint box, and the sealing performance is good; and if the test result is a smaller resistance value, the first cable core and the second cable core are judged to have poor electric insulation performance and are conducted, water permeates into the joint box, and the sealing performance is poor.
EXAMPLE III
As shown in fig. 6, in this embodiment, a method for monitoring electrical performance of a terrestrial optical cable in a junction box in the first embodiment is provided, where a first group of cable cores 1a and a ground terminal 3 respectively form a first connection terminal and a second connection terminal of an external test system, the first connection terminal and the second connection terminal are electrically connected to the test system to form a test loop, the electrical insulation is tested, and a comparison result is compared to determine whether technical parameters of the terrestrial optical cable are met, the electrical insulation of the terrestrial optical cable has a definite parameter requirement, and if the requirement of a specified index is met, it is determined that an insulating layer of the terrestrial optical cable is not broken and the electrical performance is good; and if the requirement does not meet the index requirement, judging that the insulating layer of the terrestrial optical cable is broken down and the electrical property is poor.
Under normal conditions, the first group of cable cores 1a and the cylinder 4 are arranged in an insulating way, and a test loop formed by the first group of cable cores is electrically disconnected; if the insulation of the first group of cable cores 1a is broken down, the test loop thus formed is electrically conductive.
From this, it can be judged that: forming an electrical insulation test of a loop, comparing whether a test result meets technical parameters of the terrestrial optical cable, and if the test result meets the specified index requirements, judging that an insulating layer of the terrestrial optical cable is not broken and the electrical property is good; and if the requirements of the indexes are not met, judging that the insulating layer of the terrestrial optical cable is broken down and the electrical property is poor.
Example four
As shown in fig. 7, in the method for monitoring the electrical property of the submarine optical cable in the junction box according to the embodiment of the present invention, the second group of cable cores 1b and the ground terminal 3 respectively form a first connection terminal and a second connection terminal of an external test system, the first connection terminal and the second connection terminal are electrically connected to the test system to form a test loop, the electrical insulation property is tested, whether the test result meets the technical parameters of the submarine optical cable is compared, and if the test result meets the technical parameters, it is determined that the insulating layer of the submarine optical cable is not broken down, and the electrical property is good; and if the technical requirements are not met, judging that the insulating layer of the submarine optical cable is broken down and the electrical property is poor.
Under normal conditions, the second group of cable cores 1b and the cylinder 4 are arranged in an insulating way, and a test loop formed by the method is electrically disconnected; if the insulating layer of the second group of cable cores 1b is broken down, the test loop formed thereby is electrically conductive.
From this, it can be judged that: forming an electrical insulation test of a loop, comparing whether the test result meets the technical parameters of the submarine optical cable, and if so, judging that the insulating layer of the submarine optical cable is not broken down and the electrical property is good; and if the technical requirements are not met, judging that the insulating layer of the submarine optical cable is broken down and the electrical property is poor.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a but sea and land cable splice box of monitoring electric property, includes mechanical protection subassembly, sets up the fine dish subassembly that is used for storing fiber splice inside the mechanical protection subassembly, the tip of mechanical protection subassembly is equipped with into cable mouth and seal assembly, its characterized in that:
-said cable entry port having a land cable entry port for terrestrial cable penetration, a sea cable entry port for sea cable penetration and a cable entry port for monitoring cable penetration;
the mechanical protection assembly comprises a cylinder body and two end covers which are respectively arranged at two ends of the cylinder body in a sealing manner, the outer wall of the cylinder body is provided with a grounding terminal, and the cable inlet is arranged on the end covers;
the connector box also comprises a fixed base arranged on the inner side of the end cover, the fixed base is connected with the end cover, a fixing piece is arranged on the fixed base, the fixing piece is an electric conductor and is arranged between the electric conductor and the barrel in an insulating way, the fixing piece is used for fixing the conductor parts of the land optical cable and the submarine optical cable, the fixing pieces of the land optical cable and the submarine optical cable are respectively and independently arranged and are respectively a land cable fixing piece and a submarine cable fixing piece, a steel wire reinforcing core of the land optical cable is fixed on the land cable fixing piece after the land optical cable enters the barrel, and an inner armor steel wire of the submarine optical cable is fixed on the submarine cable fixing piece after the submarine optical cable enters the barrel;
-the monitoring cable has three groups of cores, a first group of cores, a second group of cores and a third group of cores, after the monitoring cable enters the cylinder: the first group of cable cores are fixed on the land cable fixing piece, the second cable cores are fixed on the sea cable fixing piece, and the third group of cable cores are arranged in a suspended manner; the third group of cable cores comprises a first cable core and a second cable core which are insulated from each other;
the grounding terminal on the outer wall of the cylinder body, and the first cable core, the second cable core, the first group of cable cores and the second group of cable cores of the monitoring cable which are retained outside the cylinder body form a testing wiring terminal of an external testing system;
the fixing piece is of a cylindrical structure, fixing holes are formed in two end portions of the fixing piece and respectively comprise a first fixing hole and a second fixing hole, a first through hole used for penetrating through conductor portions of the land optical cable or the submarine optical cable is formed in the middle of the fixing piece in the axial direction, the first fixing hole is communicated with the first through hole, the first fixing hole is matched with a fastener to lock and fix the conductor portions of the land optical cable or the submarine optical cable penetrating through the first through hole, and the first group of cable cores and the second group of cable cores are respectively fixed on the second fixing holes of the fixing piece.
2. A sea and land cable closure for monitoring electrical properties according to claim 1, wherein: the inner side of the end cover is matched with the land cable fixing piece and the submarine cable fixing piece and is provided with the fixing base, the fixing base is of a round platform-shaped structure, a groove is formed in the top end of the fixing base, and the land cable fixing piece or the submarine cable fixing piece is respectively embedded in the grooves in the fixing base.
3. A sea and land cable closure for monitoring electrical properties according to claim 2, wherein: the fixed base is made of nylon.
4. A sea and land cable closure for monitoring electrical properties according to claim 1, wherein: the cable inlet is a step through hole penetrating through the end cover, the step through hole is provided with three steps, namely a first step, a second step and a third step which are sequentially arranged from outside to inside, the first step, the second step and the third step are respectively a threaded hole, a conical hole and a through hole which are concentrically arranged, and a cable core of each cable penetrates into the cylinder body from outside to inside and then penetrates out of the third step.
5. A sea and land cable closure for monitoring electrical properties according to claim 4, wherein: the sealing assembly is arranged in the second section of step in a penetrating mode and comprises a sealing gasket, a conical cable sealing ring and a sealing gasket which are arranged from outside to inside in sequence.
6. A sea and land cable closure for monitoring electrical properties according to claim 4, wherein: the cable sealing locking part penetrates through the first section of step, and after each cable penetrates into the barrel body from the cable inlet, the cable sealing locking part is pressed on the sealing assembly to seal and lock each cable.
7. A sea and land cable closure for monitoring electrical properties according to claim 1, wherein: the fiber disc assembly comprises a tray base, a fiber guide plate and a fiber disc box, wherein the tray base is fixed on the inner side of the end cover, the fiber guide plate is fixed on the tray base, and the fiber disc box is fixed on the fiber guide plate.
8. A sea and land cable closure for monitoring electrical properties according to claim 1, wherein: the cable inlet is four, and is a land cable inlet, a submarine cable inlet, a cable inlet and a standby cable inlet, and the land cable inlet and the submarine cable inlet are respectively arranged on the end covers on the two opposite sides.
9. A method of monitoring the electrical properties of a sea and land cable closure according to any one of claims 1 to 8, wherein: (1) when the sealing performance of the joint box is tested, the first cable core and the second cable core respectively form a first connecting terminal and a second connecting terminal of an external test system, the first connecting terminal and the second connecting terminal are electrically connected to the test system to form a test loop, the electrical insulation performance is tested, and if the test result is a great resistance value, the electrical insulation performance of the first cable core and the second cable core is judged to be good, no water permeates into the joint box, and the sealing performance is good; if the test result is a smaller resistance value, the first cable core and the second cable core are judged to have poor electrical insulation performance and conduction, water permeates into the joint box, and the sealing performance is poor;
(2) when the electrical property of the land optical cable is tested, the first group of cable cores and the grounding terminal respectively form a first wiring terminal and a second wiring terminal of an external test system, the first wiring terminal and the second wiring terminal are electrically connected to the test system to form a test loop, and the electrical insulation property is tested; comparing whether the test result meets the technical parameters of the terrestrial optical cable, if so, judging that the insulating layer of the terrestrial optical cable is not broken and the electrical property is good; if the technical requirements are not met, the insulating layer of the terrestrial optical cable is judged to be broken down, and the electrical property is poor;
(3) when the electrical property of the submarine optical cable is tested, the second group of cable cores and the grounding terminal respectively form a first wiring terminal and a second wiring terminal of an external test system, the first wiring terminal and the second wiring terminal are electrically connected to the test system to form a test loop, and the electrical insulation property is tested; comparing whether the test result meets the technical parameters of the submarine optical cable, and if so, judging that the insulating layer of the submarine optical cable is not broken down and the electrical property is good; and if the technical requirements are not met, judging that the insulating layer of the submarine optical cable is broken down and the electrical property is poor.
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| CN201610703010.0A CN106199878B (en) | 2016-08-22 | 2016-08-22 | Sea-land cable joint box capable of monitoring electrical performance and electrical performance monitoring method thereof |
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| CN201610703010.0A CN106199878B (en) | 2016-08-22 | 2016-08-22 | Sea-land cable joint box capable of monitoring electrical performance and electrical performance monitoring method thereof |
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| CN106199878A CN106199878A (en) | 2016-12-07 |
| CN106199878B true CN106199878B (en) | 2022-12-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109031557B (en) * | 2018-08-17 | 2020-02-14 | 福州万山电力咨询有限公司 | Engineering optical cable conductor with intermediate joint structure |
| CN110048767A (en) * | 2019-04-09 | 2019-07-23 | 安徽大学 | Optical cable connecting box and its monitoring method |
| US20220252818A1 (en) * | 2019-06-13 | 2022-08-11 | Nec Corporation | Landing cable and partial landing cable |
| CN117092770B (en) * | 2023-10-18 | 2023-12-22 | 江苏亨通海洋光网系统有限公司 | Bipolar submarine optical cable joint box |
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| US6829424B1 (en) * | 1996-01-17 | 2004-12-07 | Ccs Technology, Inc. | Cable joint for optical fibers with splicing cassettes and overlength loops |
| CN1790078A (en) * | 2005-12-27 | 2006-06-21 | 江苏中天科技股份有限公司 | Seabed optical cable branch joint box and connection process thereof |
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| CN106199878A (en) | 2016-12-07 |
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Address after: 215500 Building 2, No.8, Tongda Road, Changshu Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee after: Jiangsu Hengtong Huahai Technology Co.,Ltd. Country or region after: China Address before: 215500 Building 2, No.8, Tongda Road, Changshu Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee before: JIANGSU HENGTONG MARINE CABLE SYSTEMS Co.,Ltd. Country or region before: China |