CN101459329B - Middle joint of high voltage electric cable for connecting composite optical fiber and connecting method - Google Patents
Middle joint of high voltage electric cable for connecting composite optical fiber and connecting method Download PDFInfo
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- CN101459329B CN101459329B CN2007101721962A CN200710172196A CN101459329B CN 101459329 B CN101459329 B CN 101459329B CN 2007101721962 A CN2007101721962 A CN 2007101721962A CN 200710172196 A CN200710172196 A CN 200710172196A CN 101459329 B CN101459329 B CN 101459329B
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Abstract
The invention relates to an intermediate connector of an optical fiber composite high-voltage cable, which comprises a conductor connecting member, an insulating and stress balancing unit and a metal outer case, wherein the conductor connecting member is a pipe with one longitudinal H-shaped section, the middle part of the pipe is equipped with a partition board, two sides of the partition board are cavities communicated with the outside, two conductor ends of the high-voltage cable can be respectively disposed in the cavities on the two sides of the partition board inside the conductor connecting member, the outside of the conductor connecting member is sequentially connected with the insulating and stress balancing unit and the metal outer case, and the partition board is equipped with at least one passage contained in the high-voltage cable conductor for penetrating with an optical cable. The intermediate connector realizes electrical and optical connection of the optical fiber composite high-voltage electric cable.
Description
Technical Field
The invention relates to cable connection, in particular to an intermediate joint of a high-voltage cable compounded with optical fibers and a method for connecting two high-voltage cables with optical cables by using the intermediate joint.
Background
In order to ensure the safe operation of the high-voltage underground cable system, the power department needs to monitor the high-voltage underground cable system on line. The main contents of online monitoring include two aspects of load monitoring and fault monitoring.
The constraints on the load carrying capacity of the cable are mainly due to the allowable working temperature limits of the materials from which the cable and the cable accessories are made. For example, for XLPE cables, the temperature of the cable conductor, i.e. the XLPE adjacent to the conductor, is generally specified not to exceed 85 ℃ or 90 ℃. In cable and cable system design, the load capacity is designed mainly according to conductor temperature limitation. The load capacity of a cable system is typically designed according to IEC60287 and IEC853 standards. These standards assume that the load current is constant or varies substantially according to a daily load curve pattern, and that ambient conditions are determined. To ensure design safety, the assumed conditions are often extreme, resulting in low actual operating loads of the cable system and the possibility of underutilization of the assets. In fact, due to the complexity of the electrical interactions and the thermal conductivity problems of the cables, the above criteria do not make it possible to provide reliable and accurate solutions for cables in relatively complex laying environments (in particular multi-circuit). The temperature of the cable is detected on line, a way for solving the problem is provided, the conductor temperature is very important and can be directly used as a key index for load monitoring.
By using a Distributed Temperature Sensing (DTS) technology, the Temperature distribution of an optical fiber with the length of several kilometers to dozens of kilometers can be detected, and the distance of a sampling point can reach 1 to 2 meters. The temperature measuring optical fiber is arranged along the axial direction of the cable, so that the axial temperature distribution of the cable can be obtained. Because the conductor of the high-voltage cable is at high-voltage potential and is wrapped by an insulating layer with undamaged integrity, the temperature of the conductor cannot be directly measured by using the DTS technology. There are generally two methods of measuring the temperature of a conductor in practice:
1. external installation: the method is to arrange the optical cable containing the temperature measuring optical fiber on the surface of the cable. For the cables in the cable tunnel and the direct-buried cables before backfilling, the optical cables can be fixed on the surface of the cables manually by adopting a binding or bonding method. However, for cables laid in a calandria manner, the cable is usually pulled into the calandria after the cable is completely threaded. In this case, the cable is less likely to be in intimate contact with the cable surface in the above-described situation, part of the cable may be in contact with the cable surface, and part may be suspended in the medium in the gauntlet without contacting the cable. This will introduce uncertainty into the model, leading to large computational errors.
2. Built-in type: in the cable manufacturing stage, a temperature measuring optical fiber or optical cable is added to a certain layer or between two layers outside the cable insulating layer, and the most typical arrangement is between the semiconductor insulating shielding layer and the metal sleeve. Chinese patent publication No. CN1624812A, Japanese patent publication No. 1990-144810, 1994-148001, 1994-181013, 1994-181014 and 1994-181015 disclose various optical fiber composite power cables. They all structurally dispose the fiber optic cable between the cable insulation and the jacket. In the built-in approach, the cable is very consistently at a certain level outside the cable insulation, which solves the above-mentioned external problems, and the problem of connecting the optical fibers at the cable joint must be dealt with, which complicates the cable joint installation process. Typically, a jumper cable is used, and two fusion splicing points are used to splice the optical fiber pigtails of two cables. That is, in order to monitor the temperature distribution of one cable, the number of fusion points on the temperature measuring optical fiber is at least twice as many as the number of cable joints.
Fig. 1 is a schematic diagram of a prior art intermediate joint and the connection of an optical cable. In the conventional optical cable composite power cable, the optical cable is placed outside the insulating layer, so that two optical cables 17 and 18 to be connected are firstly led out from the side of the cable in the process of manufacturing the middle joint, and then the electrical parts are separately connected, wherein the conductor connecting part 16 is usually in a butt joint mode of two chambers. The optical part is additionally connected and protected outside the electrical part. The two outgoing optical cables 17, 18 are respectively connected through two splice boxes 19, 20 and an intermediate jumper 21.
Statistics show that the failure rate of the cable intermediate joint and the cable terminal is far greater than that of the cable body in the first years of operation of the cable system. The types of faults include both overheating due to poor connection of the connector or terminal of the cable conductor, and insulation faults of the cable intermediate joint and the cable termination due to defects or points of failure introduced during the design, manufacturing and installation stages. Whereas in the above-described cable arrangements the detection fibre is located outside the cable insulation at earth potential, which insulation has a geometry larger than that of the cable body, in many cases the fibre has to be arranged even outside the metal shield of the cable or the cable joint watertight sheath having a larger geometry. In this case, the temperature response of the position of the detection fiber to the heat generation of the conductor is weak and lags behind that of the cable body. A mathematical model of the conductor temperature for the cable body cannot be applied here and temperature anomalies of the cable are not easily detected. Similarly, the partial discharge signal generated by the internal insulation failure is attenuated more severely because it penetrates through the thicker insulation and other protective layers, and is not easy to be detected by the detection optical fiber.
In addition, for longer cables, the number of fusion splices is greater using conventional methods. The optical fiber fusion point has certain loss and unreliability, and has negative influence on DTS temperature measurement. Another significant disadvantage of the built-in type is that, due to the position of the optical fibers, the cable may be under tension during the manufacturing, coiling, transportation, installation and operation stages. The mechanical strength of the optical fiber is low, and the optical fiber cannot be repaired once damaged. Therefore, high requirements are put on the protection design, manufacture and construction of the optical fiber.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an intermediate joint for connecting a high-voltage power cable with optical fibers compounded in a cable conductor. The intermediate joint and the connecting method of the invention realize the electrical and optical connection of the high-voltage power cable with the optical fiber compounded in the conductor.
The technical scheme of the invention is as follows:
the intermediate joint of the high-voltage cable for connecting the composite optical fiber comprises a conductor connecting piece, an insulation and stress balancing unit and a metal shell, wherein the conductor connecting piece is a pipe fitting with an I-shaped longitudinal section, the middle part of the pipe fitting is provided with a partition plate, two sides of the partition plate are chambers leading to the outside, two conductor ends of the high-voltage cable can be respectively placed in the chambers at two sides of the partition plate in the conductor connecting piece, and the outer side of the conductor connecting piece is sequentially provided with the insulation and stress balancing unit and the metal shell.
The cable is characterized in that at least one optical cable channel is arranged in a conductor of the cable, at least one optical cable is arranged in each optical cable channel, the channels and the optical cables extend along the axial direction of the cable and are distributed in the whole length of the cable, the diameter of each optical cable channel is larger than that of each optical cable, the length of each optical cable is larger than that of each optical cable channel, and the optical cables are distributed in the optical cable channels in a bending mode.
A method for installing an intermediate joint of a high voltage cable for connecting composite optical fibers, comprising the steps of:
the method comprises the following steps that firstly, cable ends are respectively manufactured for a first cable and a second cable to be connected, and the cable ends are exposed out of conductor ends;
secondly, drawing the cable A from the conductor of the first cable, penetrating through the conductor connecting piece, extending into the chamber from one end of the conductor connecting piece, penetrating through the channel on the partition board and the other chamber, and extending out from the other end of the conductor connecting piece;
thirdly, drawing an optical cable B from the conductor of the second cable, and manufacturing optical cable joints for the optical cables A and B;
fourthly, respectively inserting the conductor end of the first cable and the conductor end of the second cable into a cavity of the conductor connecting piece, and clamping the conductor connecting piece and the conductor end by using crimping pliers;
and fifthly, finishing the subsequent manufacture of the cable connector according to the conventional process.
The optical cable joint is a rigid pipe fitting, and two ends of the optical cable joint are respectively and mechanically connected with the outer sheaths of the two sections of optical cables.
The length of the optical cable joint is greater than 1/2 of the length of the conductor connecting piece, and the outer diameter of the optical cable joint is smaller than the inner diameter of the optical cable channel in the conductor.
Another method for installing an intermediate joint of a high-voltage cable for connecting composite optical fibers includes the following steps:
the method comprises the following steps that firstly, cable ends are respectively manufactured for a first cable and a second cable to be connected, and the cable ends are exposed out of conductor ends;
secondly, drawing an optical cable A from the conductor of the first cable, wherein the extended optical cable A penetrates through one end of the guide pipe and penetrates out of the other end of the guide pipe, then the optical cable A penetrates through the conductor connecting piece and the guide pipe, the optical cable A extends into the cavity from one end of the conductor connecting piece, penetrates through the channel on the partition board and the other cavity and extends out of the other end of the conductor connecting piece;
thirdly, drawing an optical cable B from the conductor of the second cable, and manufacturing optical cable joints for the optical cable A and the optical cable B;
fourthly, respectively inserting the conductor end of the first cable and the conductor end of the second cable into the cavity of the conductor connecting piece, respectively inserting the two ends of the guide tube into optical cable channels in the conductors of the first cable and the second cable, and clamping the conductor connecting piece and the conductor ends by using crimping pliers;
and fifthly, finishing the subsequent manufacture of the cable connector according to the conventional process.
The inner diameter of the guide tube is larger than the outer diameter of the optical cable, the outer diameter of the guide tube is smaller than the inner diameter of the optical cable channel in the conductor, and the outer wall of the guide tube is provided with a bulge 1/2, the length of the bulge to at least one end head of the bulge is larger than the length of the conductor connecting piece.
The guide tube is made of copper, an alloy with copper as a main component, aluminum, an alloy with aluminum as a main component, or austenitic stainless steel.
In the invention, the optical cable joint is made of copper, an alloy taking copper as a main component, aluminum, an alloy taking aluminum as a main component, austenitic stainless steel or a hot-melt plastic pipe with a rigid framework.
The invention has the technical effects that:
in order to solve the connection problem of the high-voltage power cable with the optical cable in the cable conductor, the invention provides that a channel for accommodating the optical cable to pass through is arranged on a partition plate in the middle of a conductor connecting piece with an I-shaped longitudinal section on the basis of the original intermediate joint, so that the optical cable after fusion welding is still positioned in the middle of the cable conductor, therefore, the optical fiber can directly detect the conductor temperature of the cable, and can effectively detect the ultrasonic signal partially discharged by the cable. In the invention, the optical cables are connected in an equipotential manner under high-voltage potential, high-voltage and low-voltage potential difference is not spanned, the insulation of the conventional cable intermediate joint is not influenced, and the installation process is simple and reliable.
Drawings
Fig. 1 is a schematic diagram of a prior art intermediate joint and the connection of an optical cable.
Fig. 2 is a schematic structural view of an intermediate joint of a high voltage cable for connecting composite optical fibers according to the present invention.
Fig. 3 is a structural sectional view of a conductor connecting member of an intermediate joint of a high voltage cable connecting composite optical fibers according to the present invention.
Fig. 4 is a cross-sectional view of another structure of a conductor connecting member of an intermediate joint of a high voltage cable connecting composite optical fibers according to the present invention.
Fig. 5 is a schematic view of embodiment 1 of the method of connecting a high voltage cable of composite optical fibers by an intermediate joint of the present invention.
Fig. 6 is a schematic view of embodiment 2 of the method of connecting a high voltage cable of composite optical fibers by an intermediate joint of the present invention.
Wherein,
1-conductor connecting piece 2-insulating unit 3-stress balancing unit 4-metal shell 5-channel 6-first central conductor 7-second central conductor 8-first chamber 9-second chamber 10-partition plate 11-first optical cable 12-second optical cable 13-optical cable joint 14-guide tube 15-bulge 16-conductor connecting part 17-optical cable 18-optical cable 19-joint box 20-joint box 21-middle jumper 22-partition plate 23-limiting rib
Detailed Description
The intermediate joint for connecting a high-voltage cable with composite optical fibers and the method for connecting a high-voltage power cable with composite optical fibers according to the present invention will be described in further detail with reference to the accompanying drawings and specific examples, but the scope of the present invention is not limited thereto.
The cable is a high-voltage power cable, at least one optical cable channel is arranged in a conductor of the cable, at least one optical cable is arranged in the optical cable channel, the channel and the optical cable extend along the axial direction of the cable and are distributed in the whole length of the cable, the inner diameter of the optical cable channel is larger than the outer diameter of the optical cable, the length of the optical cable is larger than the length of the optical cable channel, and the optical cable is distributed in the optical cable channel in a bending mode. When the optical cable pulling device is used, the optical cable can be pulled out from a conductor of the optical cable for a certain distance, the optical cable can be retracted into the optical cable channel by the elasticity of the optical cable, or the optical cable is pushed back into the optical cable channel by manpower, and the optical cable retracted or pushed back into the optical cable channel is still distributed in the optical cable channel in a bending mode.
In the process of connecting the optical cables at the two ends, the simultaneous connection of the optical cables and the electric cables must be considered, and the optical cables do not span high potential and ground potential, so that the safety can be ensured. The intermediate connector of the invention is designed for realizing the photoelectric connection of the cable.
Referring to fig. 2, fig. 2 is a schematic structural view of an intermediate joint of a high-voltage cable for connecting composite optical fibers according to the present invention. As can be seen from the figure, the intermediate joint of the high-voltage cable for connecting composite optical fibers in the invention comprises a conductor connecting piece 1, an insulating unit 2, a stress equalizing unit 3 and a metal shell 4. Wherein the insulation unit 2 and the stress equalization unit 3 constitute an insulation and stress equalization unit. The conductor connecting piece 1 is a pipe fitting with an I-shaped longitudinal section, the middle part of the pipe fitting is provided with a partition board, and the partition board is provided with a channel 5 which can accommodate the optical cable in the high-voltage cable conductor to pass through. On both sides of the partition there are chambers which open to the outside and are used to receive and hold the conductor ends of two lengths of cable, respectively. The outer side of the conductor connecting piece 1 is sequentially provided with an insulation and stress balance unit and a metal shell 4, and the outer layers are distributed to mainly play roles in insulating and protecting the conductor.
Fig. 3 is a structural sectional view of a conductor connecting member of an intermediate joint of a high voltage cable connecting composite optical fibers according to the present invention. As can be seen, the passage in the partition 22 is a circular hole having an inner diameter larger than the outer diameter of the optical cable in the cable conductor.
Fig. 4 is a cross-sectional view of another structure of a conductor connecting member of an intermediate joint of a high voltage cable connecting composite optical fibers according to the present invention. The middle of the conductor connector 1 is provided with a limiting rib 23, the center of the limiting rib 23 is a channel, and the limiting rib 23 is formed by an overlarge channel arranged on a partition plate or an obstacle arranged in a straight channel of the conductor connector 1 and used for blocking the end of a conductor. The limiting ribs 23 only play a role in blocking the conductor end extending into the cavity, so that the conductor end can only extend into the limiting ribs 23 of the conductor connecting piece.
Example 1
Fig. 5 is a schematic view of embodiment 1 of the method of connecting a high voltage cable of composite optical fibers by an intermediate joint of the present invention. This figure describes a method for installing an intermediate joint for a high-voltage cable for connecting composite optical fibres, comprising the following steps:
the method comprises the following steps that firstly, cable ends are respectively manufactured for a first cable and a second cable to be connected, and a first central conductor 6 and a second central conductor 7 are respectively stripped;
secondly, pulling out a first optical cable 11 from a first central conductor 6 of the first cable, sequentially passing the first optical cable 11 through a first chamber 8, a channel 5 and a second chamber 9, and penetrating out of the second chamber 9 for a certain length;
the third step is to insert the first central conductor 6 into the first chamber 8 and against the partition 10. Pulling out a second optical cable 12 from a second central conductor 7 of the second cable, manufacturing an optical cable joint 13 for the first optical cable 11 and the second optical cable 12 by using a stainless steel tube with the length being greater than 1/2 of the length of the conductor connecting piece, wherein the stainless steel tube protects an optical fiber fusion point and a stripped part of optical fibers, two ends of the stainless steel tube are respectively lapped on outer jackets of the first optical cable 11 and the second optical cable 12, two ends of the stainless steel tube are clamped by using crimping pliers to fix the first optical cable 11, the second optical cable 12 and the optical cable joint 13, and the outer diameter of the optical cable joint 13 is smaller than the inner diameter of an optical cable channel in each cable conductor, so that the optical cable joint 13 can penetrate into the optical cable channel;
the fourth step is divided into two stages: a first stage of bringing the end face of the second central conductor 7 of the second cable close to the entrance of the second chamber 9 of the conductor connector 1, in which stage the gradual pushing of the connected cable into the cable channel in the cable conductors is manually assisted and it is ensured that at the start of the second stage the cable joint 13 spans between the end faces of the two cable conductors; in the second stage, the end of the second central conductor 7 is inserted into the second chamber 9 of the conductor connecting piece, in the stage, the optical cable cannot be seen by naked eyes, and the optical cable cannot be pushed into the optical cable guide pipe where the optical cable is located manually, the detection optical cable can automatically retreat into the optical cable channel in the cable conductor without obvious deformation until the end of the second central conductor 7 is completely inserted into the second chamber 9 of the conductor connecting piece and abuts against the partition plate of the conductor connecting piece, and the conductor end is clamped by the conductor connecting piece through crimping pliers;
and fifthly, finishing the subsequent manufacture of the cable connector according to the conventional process.
Example 2
Fig. 6 is a schematic view of embodiment 2 of the method of connecting a high voltage cable of composite optical fibers by an intermediate joint of the present invention. This figure describes a method for installing an intermediate joint for a high-voltage cable for connecting composite optical fibres, comprising the following steps:
the first step is that cable ends are respectively manufactured for a first cable and a second cable to be connected, and a first central conductor 6 and a second central conductor 7 are respectively stripped;
a second step of pulling out the first optical cable 11 from the first central conductor 6 of the first cable, passing the first optical cable 11 through a guide tube 14 and exposing it to a proper length, the guide tube 14 being made of a copper material and having a disc-shaped protrusion 15 at a middle portion thereof, an outer diameter of the guide tube 14 being loosely fitted to an inner diameter of the cable passage in the cable conductor, an outer diameter of the protrusion 15 being larger than the inner diameter of the cable passage, inserting one end of the guide tube 14 into the cable passage of the first conductor 6 up to the protrusion 15;
thirdly, the first cavity 8 of the conductor connecting piece 1 is sleeved into the first conductor 6 until the partition board 10 is reached, the second optical cable 12 is pulled out from the second conductor 7 of the second cable, an optical cable joint 16 is manufactured for the first optical cable 11 and the second optical cable 12, two ends of the optical cable joint 16 are lapped on outer jackets of the first optical cable 11 and the second optical cable 12, and two ends of the optical cable joint 16 are tightly clamped by a crimping clamp so that the first optical cable 11, the second optical cable 12 and the optical cable joint 16 are connected into a whole;
the fourth step is divided into two stages. In a first phase, the end face of the second conductor 7 of the second cable is brought close to the entrance of the second chamber 9 of the conductor connector 1, in which phase the connected cable is gradually pushed into the cable channel in which it is located inside the cable conductor, manually assisted; in the second stage, the end of the second conductor 7 is inserted into the second chamber 9 of the conductor connecting piece, so that the guide tube 14 extends into the optical cable channel of the second conductor 7 at one end of the second chamber 9 until the end of the second conductor 7 is completely inserted into the second chamber 9 of the conductor connecting piece until the end abuts against the partition plate, and the conductor connecting piece is clamped on the end of each conductor by using crimping pliers;
and fifthly, finishing the subsequent manufacture of the cable connector according to the conventional process.
It goes without saying that the intermediate joint for high-voltage cables for connecting composite optical fibers and the method for connecting high-voltage cables according to the present invention have other structural alternatives and material choices, and are not limited to those mentioned in the above embodiments. In summary, the protection of the present invention also includes other variations and alternatives that will be apparent to those skilled in the art.
Claims (10)
1. The intermediate joint of the high-voltage cable for connecting the composite optical fiber comprises a conductor connecting piece, an insulation and stress balancing unit and a metal shell, wherein the conductor connecting piece is a pipe fitting with an I-shaped longitudinal section, the middle part of the pipe fitting is provided with a partition plate, two sides of the partition plate are chambers leading to the outside, two conductor ends of the high-voltage cable can be respectively placed in the chambers at two sides of the partition plate in the conductor connecting piece, and the outer side of the conductor connecting piece is sequentially provided with the insulation and stress balancing unit and the metal shell.
2. An intermediate joint for a high voltage cable according to claim 1, wherein at least one cable channel is provided in the conductor of the cable, at least one optical cable is provided in each cable channel, the channel and the optical cable extend in the axial direction of the cable and are distributed along the entire length of the cable, the diameter of the cable channel is larger than the diameter of the optical cable, the length of the optical cable is larger than the length of the cable channel, and the optical cable is distributed in the cable channel in a curved manner.
3. A method of installing an intermediate joint of a high voltage cable for connecting composite optical fibers according to claim 2, comprising the steps of:
the first step is that cable ends are respectively manufactured for a first cable and a second cable to be connected;
secondly, drawing a cable A from the conductor of the first cable, and penetrating through the conductor connecting piece;
thirdly, drawing an optical cable B from the conductor of the second cable, and manufacturing optical cable joints for the optical cable A and the optical cable B;
fourthly, inserting the conductor ends of the first cable and the second cable into two cavities of the conductor connecting piece respectively, and clamping the conductor connecting piece and the conductor ends by using crimping pliers;
and fifthly, finishing the subsequent manufacture of the cable connector according to the conventional process.
4. The method of claim 3, wherein the optical cable joint is a rigid tube having two ends mechanically connected to the outer sheaths of the two optical cables.
5. The method of claim 4, wherein the optical cable joint is made of copper, an alloy containing copper as a main component, aluminum, an alloy containing aluminum as a main component, or austenitic stainless steel.
6. The method of installing an intermediate joint for a high voltage composite optical fiber cable according to claim 3, wherein the optical cable joint is a hot-melt plastic tube with a rigid frame.
7. The method of installing an intermediate joint of a high voltage cable for connecting composite optical fibers according to claim 4, wherein the length of the cable joint is greater than 1/2 of the length of the conductor connecting member, and the outer diameter of the cable joint is smaller than the inner diameter of the cable passage in the conductor.
8. A method of installing an intermediate joint of a high voltage cable for connecting composite optical fibers according to claim 2, comprising the steps of:
the first step is that cable ends are respectively manufactured for a first cable and a second cable to be connected;
secondly, drawing an optical cable A from the conductor of the first cable, and enabling the optical cable A to pass through the conductor connecting piece and a guide pipe;
thirdly, drawing an optical cable B from the conductor of the second cable, and manufacturing optical cable joints for the optical cables A and B;
fourthly, inserting the conductor end of the first cable and the conductor end of the second cable into two cavities of the conductor connecting piece respectively and abutting against the partition board, inserting two ends of the guide tube into optical cable channels of the first cable and the second cable respectively, and clamping the conductor ends by the conductor connecting piece by using crimping pliers;
and fifthly, finishing the subsequent manufacture of the cable connector according to the conventional process.
9. The method of installing an intermediate joint of a high voltage cable for connecting composite optical fibers according to claim 8, wherein the inner diameter of the guide tube is larger than the outer diameter of the cable joint, the outer diameter of the guide tube is smaller than the inner diameter of the cable passage in the conductor, and the outer wall of the guide tube is provided with a protrusion 1/2 having a length to at least one end thereof larger than the length of the conductor connecting member.
10. The method of claim 8, wherein the guide tube is made of copper, an alloy containing copper as a main component, aluminum, an alloy containing aluminum as a main component, or austenitic stainless steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101721962A CN101459329B (en) | 2007-12-13 | 2007-12-13 | Middle joint of high voltage electric cable for connecting composite optical fiber and connecting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101721962A CN101459329B (en) | 2007-12-13 | 2007-12-13 | Middle joint of high voltage electric cable for connecting composite optical fiber and connecting method |
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| CN101459329A CN101459329A (en) | 2009-06-17 |
| CN101459329B true CN101459329B (en) | 2012-04-18 |
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| CH705632A2 (en) * | 2011-10-06 | 2013-04-15 | Huber+Suhner Ag | Cable strain relief for cables, in particular fiber-optic cables. |
| CN102494800A (en) * | 2011-12-06 | 2012-06-13 | 昆明理工大学 | Method of using optical fiber Bragg grating to monitor temperature of intermediate connector of medium-voltage power cable |
| CN103905487B (en) * | 2012-12-26 | 2017-09-29 | 联想(北京)有限公司 | A kind of file sharing method and electronic equipment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3966299A (en) * | 1974-03-20 | 1976-06-29 | Pirelli General Cable Works Limited | Communication cables |
| CN2561148Y (en) * | 2002-03-19 | 2003-07-16 | 徐凌堂 | Weather-resist, withstand-voltage optical fiber cable integrated underground instrument connecting joint |
| CN201134660Y (en) * | 2007-12-13 | 2008-10-15 | 上海波汇通信科技有限公司 | Intermediate joint of high-voltage cable connecting combined optical fiber |
-
2007
- 2007-12-13 CN CN2007101721962A patent/CN101459329B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3966299A (en) * | 1974-03-20 | 1976-06-29 | Pirelli General Cable Works Limited | Communication cables |
| CN2561148Y (en) * | 2002-03-19 | 2003-07-16 | 徐凌堂 | Weather-resist, withstand-voltage optical fiber cable integrated underground instrument connecting joint |
| CN201134660Y (en) * | 2007-12-13 | 2008-10-15 | 上海波汇通信科技有限公司 | Intermediate joint of high-voltage cable connecting combined optical fiber |
Non-Patent Citations (1)
| Title |
|---|
| JP昭60-142316A 1985.07.27 |
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