CN202474798U - Intermediate splicing box for optical fiber composite power cable - Google Patents
Intermediate splicing box for optical fiber composite power cable Download PDFInfo
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- CN202474798U CN202474798U CN 201220102996 CN201220102996U CN202474798U CN 202474798 U CN202474798 U CN 202474798U CN 201220102996 CN201220102996 CN 201220102996 CN 201220102996 U CN201220102996 U CN 201220102996U CN 202474798 U CN202474798 U CN 202474798U
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- optical fiber
- continued access
- fiber composite
- cable
- power cable
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Abstract
The utility model discloses an intermediate splicing box for an optical fiber composite power cable, which comprises a housing, photoelectric separating finger covers, an optical fiber splicing plate and a sealed fastening device; the housing is divided into an upper housing and a lower housing, which are symmetrical with each other, and are detachably fixed together by the sealed fastening device; and the two photoelectric separating finger covers are available, and are respectively of a cylindrical shrinkable tube with a one-inlet and two-outlet structure or a one-inlet and multi-outlet structure. According to the intermediate splicing box of the utility model, the housing is divided into the upper part and the lower part, and the cable core splicing operation is separated from the upper/lower housing merging and installing operation, i.e. the cable core splicing operation is not limited by the space of the housing, the splicing operation of the optical fiber composite power cable can be conveniently carried out, the power/communication transmission stability of an intermediate splicing joint of the optical fiber composite power cable can be guaranteed, and the intermediate splicing box plays a part in press resistance, water resistance and the like.
Description
Technical field
The utility model relates to a kind of continued access annex of cable, continued access box in the middle of particularly a kind of fiber composite power cable.
Background technology
Fiber composite power cable is a kind of novel optical fiber composite rope that is used for power circuit, has the function of common cable cable, communications optical cable and online detection etc.Be used to carry out the business such as " integration of three networks " of telecommunications network, radio network, internet content transmission and combine the construction of on-line monitoring electric power networks, finally realize the construction of the big electrical network of strong intelligence.The Optical Fiber Composite cable structurally mainly is made up of the electric power core of transferring electric power and the light unit of transport communication.The metallic conductor cable core of transferring electric power is made up of metallic conductor and insulation, and the power cable core insulation that electric pressure is high is made up of conductor screen, insulation, insulation shielding and copper strips shielding; The light unit of transport communication is made up of optical fiber, loose cover, filler, reinforcement and sheath.The composite cable of structure does not also have the ripe centre annex that continues at present like this.
All the time, electric power transfer and telecommunication optical fiber transmission are as two mutual incoherent systems, accomplish above-mentioned transfer function by two circuits respectively, and the therefore existing cable technology of continuing has only the continued access annex to simple function.For the present way of Optical Fiber Composite cable is that different function units to composite cable carries out continued access respectively, and such result is that the constant product quality property after causing can not guaranteeing to continue has a strong impact on product appearance again.Therefore be badly in need of wanting the middle annex that continues of a kind of composite cable special use to satisfy the protective characteristic requirement of cable transmission stability, operation convenience and requirements at the higher level.
Though prior art has the patent application of a plurality of Optical Fiber Composite cable halfway junction box; But the structure of its terminal box does not fully take into account the simplification of its installation and the protection water proofing property of joint in electric power core that satisfies the Optical Fiber Composite cable and fibre junction process.
Chinese patent ZL201020675339.9 " a kind of optoelectronic integration Optical Fiber Composite lv power cable connector box " for example.This connector box comprises shell, splice closure upper cover sealing element, snap close; Be provided with dividing plate, low-voltage cable linkage unit and fibre junction unit in the said connector box; Said dividing plate is arranged between low-voltage cable linkage unit and the fibre junction unit; Said shell two ends are arranged with finger type sheath, turnover cable hole, and said finger type sheath passes turnover cable hole, are provided with fluid sealant between said finger type sheath and the turnover cable hole.From the patent introduction, there are two problems: the one, said shell two ends are arranged with finger type sheath, turnover cable hole, and said finger type sheath passes turnover cable hole.The installation of this structure terminal box must the first step arrives the composite cable termination in the terminal box through turnover cable hole, then the electric power core continue and the operation that continues of optical fiber all must be carried out in terminal box.Because the space is limited in the terminal box, particularly handles the continued access of heavy in section power cable core, the restriction meeting of operating space brings extremely inconvenient to the continued access operation.The 2nd, it refers to be provided with fluid sealant between type sheath and the turnover cable hole; So this structure terminal box is that the composite cable termination is passed through the hole that has fluid sealant according to installation procedure, is to play waterproof effect through the filling of fluid sealant between terminal box hole and composite cable sheath.But, not pushed by external force, so waterproof effect is not good because the hole is a fixed dimension.
One Chinese patent application 201010536508.5 " a kind of Optical Fiber Composite low-voltage cable connector box and connect technology " for another example.This connector box comprises into continue protection module and go out cable casement piece of cable casement piece, photoelectricity; Saidly advance cable casement piece, go out cable casement piece and be symmetric relation about the photoelectricity protection module that continues; Advance cable casement piece and go out cable casement piece and be connected through screw thread and the photoelectricity protection module that continues respectively, threaded connection place photoelectricity continues the protection module external diameter less than advancing cable casement piece external diameter and going out cable casement piece external diameter.Said photoelectricity continues has in the middle of the protection module fixedly demarcation strip that the electricity protection module that continues is divided into fibre junction passage and the conductor cable passage that continues.Such structure combines the technology that continues in its patent description, is two composite cable terminations are passed through into cable casement piece respectively, gone out cable casement piece.Then the light unit is separated the back with the power cable core and get into the fixedly photoelectricity of the demarcation strip protection module that continues of band.The said photoelectricity protection module that continues is external diameter less than advancing cable casement piece, going out a tubular cylinder of cable casement piece; And continuing of optical fiber all carried out in this tubular cylinder with continuing of power cable core, and the restriction of operating space can bring the extremely inconvenient of operation.Advancing cable casement piece in addition, going out cable casement piece is to be connected through screw thread and the photoelectricity protection module that continues, like this in the operating process of rotary threaded, easily with the light unit is stressed and optical fiber fractures.
Above-mentioned deficiency still has is worth improved place.
The utility model content
The purpose of the utility model overcomes the deficiency of above-mentioned prior art, provides that a kind of convenient installation and operation is simple and easy, the middle continued access box of the Optical Fiber Composite cable of the protection good waterproof performance of joint.
The technical scheme that realizes the utility model purpose is a continued access box in the middle of a kind of fiber composite power cable, comprises shell, photodetachment fingerstall, optical fiber continued access plate and sealing fastening device; Said shell is divided into symmetrical upper casing and lower casing, and is fixed together through sealing fastening device is removable; Said photodetachment fingerstall has two, is one and advances the cylindrical heat-shrink tube that scene 2 or advances to have more structure.
Specifically, said optical fiber continued access plate comprises plate body, light unit fixedly compressing tablet and light unit set bolt; Said smooth unit fixedly compressing tablet has two, and every two ends are fixed on the two ends of plate body through light unit set bolt.
Preferred as optical fiber continued access plate, said optical fiber continued access plate also comprises two binding straps that are arranged at two ends.
Preferred as further, said optical fiber continued access plate also comprises two guide wheels, is arranged at the plate body two ends respectively, and the radius of each guide wheel is greater than the minimum bending radius of optical fiber.
Further preferred, said optical fiber continued access plate also comprises a plurality of fused fiber splice head holddown grooves that are arranged at plate body.
Specifically, said sealing fastening device comprises flange, fastening bolt and sealing gasket; Said shell is provided with the sealing gasket groove, and said sealing gasket groove comprises and is arranged at flange inboard and shell and Optical Fiber Composite cable jacket contact position; Said flange can be integral structure or be provided with separately along the edge setting of upper casing and lower casing junction with upper casing and lower casing; Said fastening bolt has a plurality of, is uniformly distributed in the edge of flange and the both sides of shell and Optical Fiber Composite cable jacket contact position; Said sealing gasket is arranged in the sealing gasket groove.
As the preferred version of shell, the upper casing of said shell and the outer surface of lower casing are continuous round slip surface.
After having adopted technique scheme; The utlity model has following positive effect: the shell of the continued access box of (1) the utility model is divided into two parts up and down; In cable core continued access operation with shell with to merge fitting operation up and down be what to separate; That is to say that cable core continued access operation does not receive the spatial constraints of shell; Made things convenient for the continued access operation of fiber composite power cable, can guarantee that middle the continued access joint electric power of Optical Fiber Composite cable, communications are stable, and play effects such as preventing pressure, waterproof.
(2) the fibre junction plate of the utility model is fixed on the whole continued access connector of electric power core through two binding straps; Help alleviating light continued access and fixing operational stresses induced, make optical fiber and electric power core remain on continued access before in fiber composite power cable inside the same integraty.When the electric power core is subjected to displacement or reverses, the whole change of light unit and electric power core, stressed also remaining on the electric power core do not have relative displacement between light unit and the electric power core, and such structure more helps protecting the stability of optical fiber continued access.
(3) outer surface of the shell of the utility model is continuous round slip surface, helps reducing cable drag and drop drag effects.
(4) the photodetachment fingerstall of the utility model is used for the light unit and the power cable core of composite cable are separated; Play the longitudinal sealing effect simultaneously; Even if get into the such extreme case of terminal box at water; Also can stop water to fill the space after the fingerstall pyrocondensation sealing and further extend, protect cable to retrieve a loss as much as possible along cable.Thermal shrinkable sleeve is an elastomeric material in addition, and the light unit separates with the power cable core through fingerstall, sees from loading angle and also can play certain stressed buffering effect, and protection optical fiber receives mechanical force and damages.
(5) owing in the continued access process, may lose the optical fiber of certain-length; This just need reserve the optical fiber of certain-length earlier before continued access; Therefore the utility model is provided with and fixedly deposits after guide wheel helps reserving the orderly pitch of the laps of fiber bundle; In handshaking procedure,, then emit a circle continuation continued access operation from reserving coil as fractureing optical fiber.
(6) the continued access method of the utility model considers that the ability of the anti-mechanical damage of optical fiber will can not show a candle to the electric power core; So the operation that continues of optical fiber be arranged in the power cable core continue operation all carry out after accomplishing, and optical fiber continued access plate is fixed on the whole continued access connector of electric power core.And optical fiber continued access plate is fixed in the particular location on the whole continued access connector of electric power core, be according to fiber unit earlier through the light unit fixedly compressing tablet rely on light unit set bolt to be fixed on the optical fiber continued access plate afterwards not receive location positioning that external force forms naturally at metallic conductor continued access body according to optical fiber continued access plate.Just be fixed on the cable body, the stress when helping avoiding installing like this exists.
(7) final step of the continued access method of the utility model is fastening for the sealing of carrying out shell with sealing fastening device; And the oversheath of a butted line box shell and Optical Fiber Composite cable is stressed in seal process; Electric power core joint and the surplus length of fiber bundle and fused fiber splice head are not stressed, guarantee the transmission stability of its joint.
Description of drawings
For the content that makes the utility model is expressly understood more easily,, the utility model is done further detailed explanation, wherein below according to specific embodiment and combine accompanying drawing
Fig. 1 is the structural representation of the utility model, and what demonstrate among the figure is the structure after the continued access.
Fig. 2 is the vertical view of the lower casing of the utility model.
Fig. 3 is the structural representation of optical fiber continued access plate, and what show among the figure is to the structure of optical fiber continued access.
Label in the accompanying drawing is:
Embodiment
See Fig. 1, Fig. 2 and Fig. 3, the continued access box comprises shell 1, photodetachment fingerstall 2, optical fiber continued access plate 3 and sealing fastening device 4 in the middle of a kind of fiber composite power cable.
Photodetachment fingerstall 2 has two; Be one and advance the cylindrical heat-shrink tube that scene 2 or advances to have more structure; Be used for the light unit and the power cable core of composite cable are separated, play the longitudinal sealing effect simultaneously, even if get into the such extreme case of terminal box at water; Also can stop water to fill the space after the fingerstall pyrocondensation sealing and further extend, protect cable to retrieve a loss as much as possible along cable.Thermal shrinkable sleeve is an elastomeric material in addition, and the light unit separates with the power cable core through fingerstall, sees from loading angle and also can play certain stressed buffering effect, and protection optical fiber receives mechanical force and damages.
Optical fiber continued access plate 3 comprises plate body 31, light unit fixedly compressing tablet 32, light unit set bolt 33, two binding straps 34, two guide wheels 35 and a plurality of fused fiber splice head holddown grooves 36.Unit fixedly compressing tablet 32 has two, and every two ends are fixed on the two ends of plate body 31 through light unit set bolt 33.Two binding straps 34 are arranged at the two ends of optical fiber continued access plate 3.Two guide wheels 35 are arranged at plate body 31 two ends respectively, and the radius of each guide wheel 35 is greater than the minimum bending radius of optical fiber.A plurality of fused fiber splice head holddown grooves 36 are arranged at plate body 31 middle parts.Fibre junction plate 3 is used for fiber bundle continued access and surplus long reservation of fiber bundle.Fibre junction plate 3 is fixed on the whole continued access connector 52 of electric power core through two binding straps 34; Help alleviating light continued access and fixing operational stresses induced, make optical fiber and electric power core remain on continued access before in fiber composite power cable inside the same integraty.When the electric power core is subjected to displacement or reverses, light unit 51 and the whole change of electric power core, stressed also remaining on the electric power core do not have relative displacement between light unit 51 and the electric power core, and such structure more helps protecting the stability of optical fiber continued access.Guide wheel 35 is mainly used in the surplus long usefulness of twining break-in of reserving of fiber bundle.The radius of guide wheel 35 can guarantee greater than the minimum bending radius of optical fiber that optical fiber can bending cause and fracture.The continued access of considering optical fiber is to form over against fusing through the optical fiber minute surface; The comparison difficulty that continues also fractures, so in the continued access process, may lose the optical fiber of certain-length easily; This just need reserve the optical fiber of certain-length earlier before continued access; Therefore be provided with and fixedly deposit after guide wheel 35 helps reserving the orderly pitch of the laps of fiber bundle, in handshaking procedure,, then emit a circle continuation continued access operation from reserving coil as fractureing optical fiber.The composite cable fiber number has 72 cores at most; Therefore the continued access of Optical Fiber Composite whole cable just has 72 fused fiber splice heads 54; The optical fiber external diameter is very little in addition; Continued access operation for ease and overall alignment arrangement are provided with fused fiber splice head holddown groove 36 fused fiber splice head 54 are arranged in order, help the simplification of operating and managing.
Sealing fastening device 4 comprises flange 41, fastening bolt 42 and sealing gasket 43; Flange 41 can be integral structure or be provided with separately along the edge setting of upper casing 11 and lower casing 12 junctions, when adopting the mode of integral type, after upper casing 11 and lower casing 12 are merged to get up, just form the structure of a Hough joint with upper casing 11 and lower casing 12; Fastening bolt 42 has a plurality of, is uniformly distributed in the edge of flange 41 and the both sides of shell 1 and Optical Fiber Composite cable jacket contact position; Sealing gasket 43 is arranged in the sealing gasket groove 13.Carry out the fastening step that is operating as last implementation of sealing of shell 1 with sealing fastening device 4; And the oversheath of a butted line box shell and Optical Fiber Composite cable is stressed in seal process; Electric power core joint and the surplus length of fiber bundle and fused fiber splice head are not stressed, guarantee the transmission stability of its joint.
Concrete continued access method may further comprise the steps:
1. processing needs the fiber composite power cable 5 of continued access: peel off two outer jacket and/or armours that need the fiber composite power cable 5 of continued access, isolate the light unit 51 and electric power core of fiber composite power cable 5;
2. photodetachment fingerstall 2 is inserted in from the termination of fiber composite power cable 5, light unit 51 passes with the different passages of electric power core through photodetachment fingerstall 2; With blowtorch or heat gun 2 pyrocondensations of photodetachment fingerstall are sealed; Same processing is carried out in termination to another root fiber composite power cable 5 of needing continued access;
3. the continued access of electric power core: the insulation displacement of the electric power core that will separate through photodetachment fingerstall 2, expose metallic conductor; Through a phase-splitting continued access body wrapped formation complete electric power core whole continued access connector 52 of twining package tape with the electric power core of two fiber composite power cables 5; For low-voltage cable; Be inserted in the isolating shrinkable sleeve pipe from an end of metallic conductor; And then with the metallic conductor butt joint of metal tube with two cover isolating shrinkable sleeve pipes; Push metal tube together with two metallic conductors of same-phase, carry out the isolating shrinkable sleeve pipe that will before put behind the conductor splice and pass through blowtorch or heat gun pyrocondensation sealed insulation; At last through twining package tape with wrapped the combining of electric power core phase-splitting continued access body; For midium voltage cable; Consider three-layer insulated system and metallic shield system, thus press after coupling connects in the middle of pyrocondensation or the shrinkage wrapped again metal mesh belt to form a whole continued access connector 52 of complete electric power core in adopting earlier according to the conductor continued access operation back of aforementioned low-voltage cable or adopt according to the conductor continued access operation back of aforementioned low-voltage cable earlier in press after coupling connects in the middle of pyrocondensation or the shrinkage wrapped again metal mesh belt and wrapped twining package tape to form a whole continued access connector 52 of complete electric power core.
4. optical fiber continued access plate 3 is fixed on the operation on the whole continued access connector 52 of electric power core through the binding strap 34 that is arranged at its two ends; Be with fiber unit 51 earlier through the light unit fixedly compressing tablet 32 rely on light unit set bolts 33 be fixed on the optical fiber continued access plate 3 back according to optical fiber continued access plate 3 in the position that metallic conductor continued access body 52 is not formed by external force naturally, be fixed on the electric power core integral body continued access connector 52 through the binding strap 34 that is arranged at its two ends.
5. the continued access of light unit 51: sheath, pine cover and the reinforcement of light unit 51 are peeled off, only stayed a branch of fiber bundle 53; The optical fiber of the fiber bundle 53 of two fiber composite power cables 5 is carried out welding correspondingly respectively form fused fiber splice head 54; Each fused fiber splice head 54 is put fused fiber splice sleeve pipe 7 with protection fused fiber splice head 54 forming fused fiber splice head 54 backs, be arranged in the fused fiber splice head holddown groove 36 of fibre optic patch panel 3 according to order respectively then and put; Between formation fused fiber splice head 54, carry out surplus long reservation of fiber bundle earlier: will need the fiber bundle 53 of two fiber composite power cables 5 of continued access to be wound in formation fiber bundle circle 6 between two guide wheels 35 respectively; Every fiber bundle 53 twines two circles at least between two guide wheels 35, form two fiber bundle circles 6, and the reason of operation is that the number of turns can form cast very little like this; With fiber bundle 53 when guide wheel 35 twines; With two guide wheels 35 is major axis; With optical fiber continued access plate 3 width is minor axis, lets fiber bundle 53 by its elasticity free bend lopping, operates the surplus that can leave relative microdisplacement after the lopping like this; Help the optical fiber stretching displacement that reason such as cable bending causes, protect optical fiber not receive the external force damage fully and influence light-transfer characteristic.
6. fixed housing 1: sealing gasket 43 is put into sealing gasket groove 13; With upper casing 11 and lower casing 12, connect into a middle continued access box of complete fiber composite power cable through flange 41 and fastening bolt 42.
At last, ready-made Optical Fiber Composite cable continued access joint is carried out dependence test continued access box in the middle of the continuous power cable of Optical Fiber Composite is fixed on the relevant position after qualified, accomplish the integrated operation of fiber composite power cable continued access.
Above-described specific embodiment; Purpose, technical scheme and beneficial effect to the utility model have carried out further explain, it should be understood that the above is merely the specific embodiment of the utility model; Be not limited to the utility model; All within the spirit and principle of the utility model, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (7)
1. the middle continued access box of fiber composite power cable is characterized in that: comprise shell (1), photodetachment fingerstall (2), optical fiber continued access plate (3) and sealing fastening device (4); Said shell (1) is divided into symmetrical upper casing (11) and lower casing (12), and through removable being fixed together of sealing fastening device (4); Said photodetachment fingerstall (2) has two, is one and advances the cylindrical heat-shrink tube that scene 2 or advances to have more structure.
2. continued access box in the middle of the fiber composite power cable according to claim 1, it is characterized in that: said optical fiber continued access plate (3) comprises plate body (31), light unit fixedly compressing tablet (32) and light unit set bolt (33); Said smooth unit fixedly compressing tablet (32) has two, and every two ends are fixed on the two ends of plate body (31) through light unit set bolt (33).
3. continued access box in the middle of the fiber composite power cable according to claim 2, it is characterized in that: said optical fiber continued access plate (3) also comprises two binding straps (34) that are arranged at two ends.
4. continued access box in the middle of the fiber composite power cable according to claim 3; It is characterized in that: said optical fiber continued access plate (3) also comprises two guide wheels (35); Be arranged at plate body (31) two ends respectively, the radius of each guide wheel (35) is greater than the minimum bending radius of optical fiber.
5. continued access box in the middle of the fiber composite power cable according to claim 4, it is characterized in that: said optical fiber continued access plate (3) also comprises a plurality of fused fiber splice head holddown grooves (36) at the middle part that is arranged at plate body (31).
6. according to continued access box in the middle of the described fiber composite power cable of one of claim 1 to 5, it is characterized in that: said sealing fastening device (4) comprises flange (41), fastening bolt (42) and sealing gasket (43); Said shell (1) is provided with sealing gasket groove (13), and said sealing gasket groove (13) comprises and is arranged at flange (41) inboard and shell (1) and Optical Fiber Composite cable jacket contact position; Said flange (41) can be integral structure or be provided with separately along the edge setting of upper casing (11) and lower casing (12) junction with upper casing (11) and lower casing (12); Said fastening bolt (42) has a plurality of, is uniformly distributed in the edge of flange (41) and the both sides of shell (1) and Optical Fiber Composite cable jacket contact position; Said sealing gasket (43) is arranged in the sealing gasket groove (13).
7. continued access box in the middle of the fiber composite power cable according to claim 6, it is characterized in that: the upper casing (11) of said shell (1) and the outer surface of lower casing (12) are continuous round slip surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220102996 CN202474798U (en) | 2012-03-16 | 2012-03-16 | Intermediate splicing box for optical fiber composite power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220102996 CN202474798U (en) | 2012-03-16 | 2012-03-16 | Intermediate splicing box for optical fiber composite power cable |
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| Publication Number | Publication Date |
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| CN202474798U true CN202474798U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220102996 Expired - Fee Related CN202474798U (en) | 2012-03-16 | 2012-03-16 | Intermediate splicing box for optical fiber composite power cable |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810837A (en) * | 2012-03-16 | 2012-12-05 | 远东电缆有限公司 | Intermediate splicing closure and splicing method for optical fiber composite power cable |
| CN102914842A (en) * | 2012-11-14 | 2013-02-06 | 中天日立光缆有限公司 | First-aid repair adapter connector box for optical fiber composite overhead insulating phase lines and manufacture method thereof |
| CN103036192A (en) * | 2012-12-12 | 2013-04-10 | 上海南大集团有限公司 | Intelligent cable connector |
| CN108134343A (en) * | 2017-12-22 | 2018-06-08 | 宁波东方电缆股份有限公司 | A kind of emergency repair method of three-core cable |
| CN115201981A (en) * | 2022-06-15 | 2022-10-18 | 国网河北省电力有限公司经济技术研究院 | Connecting protection device for power communication optical cable |
-
2012
- 2012-03-16 CN CN 201220102996 patent/CN202474798U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810837A (en) * | 2012-03-16 | 2012-12-05 | 远东电缆有限公司 | Intermediate splicing closure and splicing method for optical fiber composite power cable |
| CN102810837B (en) * | 2012-03-16 | 2015-02-18 | 远东电缆有限公司 | Intermediate splicing closure and splicing method for optical fiber composite power cable |
| CN102914842A (en) * | 2012-11-14 | 2013-02-06 | 中天日立光缆有限公司 | First-aid repair adapter connector box for optical fiber composite overhead insulating phase lines and manufacture method thereof |
| CN103036192A (en) * | 2012-12-12 | 2013-04-10 | 上海南大集团有限公司 | Intelligent cable connector |
| CN108134343A (en) * | 2017-12-22 | 2018-06-08 | 宁波东方电缆股份有限公司 | A kind of emergency repair method of three-core cable |
| CN115201981A (en) * | 2022-06-15 | 2022-10-18 | 国网河北省电力有限公司经济技术研究院 | Connecting protection device for power communication optical cable |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20210316 |
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| CF01 | Termination of patent right due to non-payment of annual fee |