CN112649113A - Laying method of temperature sensing optical fiber used in power bus temperature measurement system - Google Patents
Laying method of temperature sensing optical fiber used in power bus temperature measurement system Download PDFInfo
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- CN112649113A CN112649113A CN202010955675.7A CN202010955675A CN112649113A CN 112649113 A CN112649113 A CN 112649113A CN 202010955675 A CN202010955675 A CN 202010955675A CN 112649113 A CN112649113 A CN 112649113A
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- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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Abstract
The invention discloses a laying method of temperature sensing optical fibers in a power bus temperature measurement system, which belongs to the technical field of optical fiber laying and comprises the following steps: s1: in the early stage of production of the power bus, a U-shaped channel with the diameter is processed on the narrow side surface of a bus conductor; s2: the method has the advantages that eddy current and circulation effects of the large-current bus on the magnetic metal material are avoided, the optical fiber protective sleeve is demagnetized, or the optical fiber protective sleeve is made of a metal or non-metal material with weak magnetic conductivity; s3: and inserting the optical fiber protective sleeve into the U-shaped channel of the bus conductor by laying and embedding the tool. The frock is inlayed to temperature sensing optic fibre is laid inside the conductor body of power bus, and the speed of laying is improved to the utilization is inlayed laying of frock comparatively convenient simple to the fastness of connecting promotes to some extent, makes temperature sensing optic fibre fixed when the temperature measurement holistic position, can not break away from, and the real-time temperature of bus conductor is directly gathered completely on temperature acquisition to the mode of laying of temperature sensing optic fibre in the power bus temperature measurement system of research and development, and the collection temperature is more accurate.
Description
Technical Field
The invention relates to the technical field of optical fiber laying, in particular to a laying method of a temperature sensing optical fiber used in a power bus temperature measurement system.
Background
Because the high-voltage bus and the electrical equipment are generally in the environment of high voltage, heavy current and strong magnetic field, in the actual monitoring, the voltage isolation between the monitoring object and the monitoring instrument is required, and the effective transmission of the test signal is also a problem which is difficult to solve all the time, therefore, some conventional temperature measurement methods are difficult to be applied to the high-voltage electrical equipment, and at present, the bus temperature monitoring mainly comprises the following schemes:
(1) color chip temperature measurement:
the temperature can be judged according to the color of the glass by utilizing the change of the color of the glass along with the temperature;
the defects are that the accuracy is low, the reliability is poor, quantitative measurement cannot be carried out, the high-voltage bus contact is difficult to monitor, and short-distance observation cannot be carried out during operation.
(2) Adopting a thermal infrared detection technology:
the method has the advantages of large measurement range and higher accuracy;
the defects are that the equipment is expensive, the high-voltage bus enclosed in the cabinet cannot be detected, and the integrated integration of the high-voltage equipment and the temperature on-line monitoring cannot be realized.
(3) The existing power bus optical fiber temperature measurement system:
the method has the advantages of large measurement range and high information transmission integration level;
the temperature sensing optical fiber of the conventional power bus optical fiber temperature measuring system is directly integrated with a bus insulating layer or the temperature sensing optical fiber is bound and arranged on the surface of the bus insulating layer, so that the temperature sensing optical fiber and a bus conductor have thicker insulating layer isolation thickness, the temperature acquired by the temperature sensing optical fiber is greatly different from the real bus conductor temperature, and the temperature is not real and accurate enough.
The temperature sensing optical fiber has a large distance with the bus conductor, so that the temperature collected by the temperature sensing optical fiber and the bus conductor temperature have serious hysteresis, the actual temperature of the bus conductor cannot be collected in real time, and in the long-term operation process of the power bus, the temperature collection precision of the temperature sensing optical fiber is influenced and the service life is reduced due to the fact that the optical fiber is easily damaged by mechanical external force due to expansion caused by heat and contraction caused by cold of the bus body or the bundling installation mode of the temperature sensing optical fiber.
Disclosure of Invention
The invention aims to provide a method for laying a temperature-sensing optical fiber in a power bus temperature measurement system, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a laying method of a temperature sensing optical fiber used in a power bus temperature measurement system comprises the following steps:
s1: processing a U-shaped channel on the narrow side surface of a bus conductor in the early stage of production of the power bus;
s2: the method has the advantages that eddy current and circulation effects of the large-current bus on the magnetic metal material are avoided, the optical fiber protective sleeve is demagnetized, or the protective sleeve is made of weak magnetic metal or nonmetal material;
s3: inserting the optical fiber protective sleeve into the U-shaped channel of the bus conductor through a laying and embedding tool;
s4: temperature sensing optical fibers are arranged in the optical fiber protective sleeve in a penetrating mode, two ends of each temperature sensing optical fiber are connected with detachable optical fiber connectors, and a plurality of groups of temperature measuring points are established by connecting a plurality of groups of optical fiber connectors in parallel or in series;
s5: pouring or assembling an insulating layer of the power bus to fix the position of the insulating layer;
s6: after the on-site whole-line installation of the power bus is finished, two ends of the temperature sensing optical fiber are in contact with the optical fiber temperature measuring system, and the temperature of the buses is measured simultaneously through the optical fiber temperature measuring host.
Further, to S1, the U-shaped channel is a structure in which the diameter of the arc opening at the bottom end is larger than that of the opening at the upper end, the diameter of the arc opening of the U-shaped channel is slightly larger than that of the optical fiber protection sleeve, the opening at the upper end is smaller than that of the optical fiber protection sleeve, the optical fiber protection sleeve is inserted into the U-shaped channel to avoid separation, and the diameter of the temperature sensing optical fiber is smaller than that of the opening at the upper end of the U-shaped channel and.
Further, in S3, the embedding fixture includes a support frame, a telescopic frame capable of sliding up and down, a rotating shaft, and a pressing wheel, the bottom of the support frame is fixed on both sides of the bus conductor, the telescopic frame is mounted on the support frames on both sides, the rotating shaft is inserted into the bearings of the two telescopic frames, and the pressing wheel fixed with the rotating shaft is sleeved on the outer portion of the rotating shaft;
the utility model discloses a cable protection device, including optic fibre protective sheath, U type passageway, the U type passageway is placed to the optic fibre protective sheath, and the pinch roller is located the port top of optic fibre protective sheath, descends through the flexible frame of control both sides, until the arc opening of the U type passageway of impressing the one end of optic fibre protective sheath in, the other end can upwarp, through the synchronous motion of optic fibre protective sheath and bus conductor, the relative optic fibre protective sheath of its pinch roller removes, impresses follow-up one end of perk to the arc opening of U type passageway in, accomplishes laying of optic fibre.
Further, in S4, one end of the temperature sensing optical fiber is moved to one end of the optical fiber protection sleeve embedded in the U-shaped channel, enters the arc-shaped opening through the upper end opening of the U-shaped channel, and the port of the temperature sensing optical fiber penetrates through the optical fiber protection sleeve by moving.
Further, in S6, the temperature sensing optical fiber is directly laid inside the conductor body of the power bus through the processed U-shaped groove, the temperature of the bus conductor is directly the object of the temperature sensing optical fiber measurement, not the bus insulation layer temperature, and the optical fiber temperature measurement host performs temperature measurement on a plurality of power buses or a plurality of points of the power bus through series connection or parallel connection between the temperature sensing optical fibers.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a laying method of temperature sensing optical fiber used in power bus temperature measuring system, which measures the temperature of a plurality of buses simultaneously through a plurality of optical fiber temperature measuring host machines, the temperature sensing optical fiber is directly laid in the conductor body of the power bus through a processed U-shaped groove, the object of the temperature sensing optical fiber measurement is the temperature of the bus conductor but not the temperature of the bus insulation layer, the optical fiber temperature measuring host machines measure the temperature of a plurality of power buses or a plurality of points of the power bus through the series connection or parallel connection between the temperature sensing optical fibers, the temperature sensing optical fiber is laid in the conductor body of the power bus through an embedding tool, the laying by the embedding tool is convenient and simple, the laying speed is improved, the connection firmness is improved, the temperature sensing optical fiber is fixed when the whole position is measured, and can not be separated from the temperature sensing optical fiber, the laying mode of the temperature sensing optical fiber in the developed power bus temperature measuring system completely and directly collects, the temperature acquisition is more accurate, and the problems of the hysteresis of temperature acquisition of the temperature sensing optical fiber and the damage of the temperature sensing optical fiber by mechanical external force in the operation process are avoided.
Drawings
FIG. 1 is a diagram of the laying state of the inlaying tool of the present invention;
FIG. 2 is a diagram showing a state before laying the temperature sensitive optical fiber according to the present invention;
FIG. 3 is a state diagram of the temperature sensitive optical fiber according to the present invention during its laying.
In the figure: 1. a support frame; 2. a telescopic frame; 3. a rotating shaft; 4. and (4) pressing the wheel.
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.
Referring to fig. 1-3, a method for laying a temperature-sensing optical fiber in a power bus temperature measurement system includes the following steps:
the method comprises the following steps: in the early stage of power bus production, a U-shaped channel is processed on the narrow side face of a bus conductor, the U-shaped channel is of a structure that the diameter of an arc opening at the bottom end is larger than that of an opening at the upper end, the diameter of the arc opening of the U-shaped channel is slightly larger than that of an optical fiber protective sleeve, the opening at the upper end is smaller than that of the optical fiber protective sleeve, the optical fiber protective sleeve is inserted into the U-shaped channel to avoid separation, and the diameter of a temperature sensing optical fiber is smaller than that of the;
the optical fiber protective sleeve is placed on the U-shaped channel, the pressing wheel 4 is positioned above the port of the optical fiber protective sleeve, the telescopic machine frames 2 on the two sides are controlled to descend until one end of the optical fiber protective sleeve is pressed into the arc-shaped opening of the U-shaped channel, the other end of the optical fiber protective sleeve is upwarped, the pressing wheel 4 moves relative to the optical fiber protective sleeve through synchronous movement of the optical fiber protective sleeve and the bus conductor, and the subsequently upwarped end of the optical fiber protective sleeve is pressed into the arc-shaped opening of the U-shaped channel, so that the laying of the;
step two: the method has the advantages that eddy current and circulation effects of the large-current bus on the magnetic metal material are avoided, the optical fiber protective sleeve is demagnetized, or the optical fiber protective sleeve is made of weak magnetic metal or nonmetal materials;
step three: the optical fiber protective sleeve is inserted into a U-shaped channel of a bus conductor by laying an embedding tool, the embedding tool comprises a support frame 1, telescopic frames 2 capable of sliding up and down, a rotating shaft 3 and a pressing wheel 4, the bottom of the support frame 1 is fixed on two sides of the bus conductor, the telescopic frames 2 are installed on the support frames 1 on the two sides, the rotating shaft 3 is inserted into bearings of the two telescopic frames 2, and the pressing wheel 4 fixed with the rotating shaft 3 is sleeved on the outer portion of the rotating shaft 3;
step four: the temperature sensing optical fiber is arranged in the optical fiber protective sleeve in a penetrating mode, two ends of the temperature sensing optical fiber are connected with the detachable optical fiber connectors, a plurality of groups of temperature measuring points are established by connecting the optical fiber connectors in parallel or in series, one end of the temperature sensing optical fiber moves to one end of the optical fiber protective sleeve embedded in the U-shaped channel, enters the arc-shaped opening through the upper end opening of the U-shaped channel, and the port of the temperature sensing optical fiber penetrates through the optical fiber protective sleeve through movement;
step five: pouring or assembling an insulating layer of the power bus to fix the position of the insulating layer;
step six: after the whole on-site installation of the power bus is finished, two ends of the temperature sensing optical fibers are in contact with the optical fiber temperature measuring system, the temperature of a plurality of buses is measured simultaneously through a plurality of optical fiber temperature measuring hosts, the temperature sensing optical fibers are directly laid inside a conductor body of the power bus through a processed U-shaped groove, the temperature of a bus conductor is directly the temperature of the temperature sensing optical fibers, but not the temperature of a bus insulation layer, and the optical fiber temperature measuring hosts measure the temperature of the plurality of power buses or a plurality of points of the power buses through the series connection or the parallel connection of the temperature.
Firstly, the temperature sensing optical fiber is laid in the conductor body of the power bus through the embedding tool, the laying by the embedding tool is convenient and simple, the laying speed is improved, the firmness of connection is improved, so that the temperature sensing optical fiber is fixed in the integral position during temperature measurement and cannot be separated from the integral position, the measured temperature is inaccurate, the temperature of the bus conductor is directly the object measured by the temperature sensing optical fiber, but not the temperature of the insulating layer of the bus, so the temperature data measured by the method more directly reflects the temperature of the heating source conductor of the power bus in the operation process, the acquired data is more real, more accurate and more effective, secondly, because the temperature sensing optical fiber is directly laid in the conductor body of the power bus, the limitation of the heat conduction time of the insulating layer does not exist, so the real-time property of temperature acquisition is timely, and the problem of temperature hysteresis does not exist.
Finally, because the temperature sensing optical fiber is protected by the optical fiber protective sleeve, the optical fiber of the bus has no stress problem in the assembling and long-term operation process, the problems of inaccurate acquisition data, easy damage of the optical fiber, short service life and the like caused by the stress of the optical fiber in the conventional optical fiber temperature measurement system are avoided, the real-time temperature of the bus conductor is completely and directly acquired by the laying mode of the temperature sensing optical fiber in the researched and developed electric bus temperature measurement system through long-term electric bus system operation measurement, the acquisition temperature is more accurate, and the hysteresis problem of temperature acquisition of the temperature sensing optical fiber and the defect of mechanical external force damage in the operation process of the temperature sensing optical fiber are avoided.
In summary, the following steps: the laying method of the temperature sensing optical fiber used in the electric power bus temperature measuring system measures the temperature of a plurality of buses simultaneously through a plurality of optical fiber temperature measuring host machines, the temperature sensing optical fiber is directly laid in a conductor body of the electric power bus through a processed U-shaped groove, the temperature of a bus conductor is directly the measured object of the temperature sensing optical fiber rather than the temperature of a bus insulation layer, the optical fiber temperature measuring host machines carry out temperature measurement on a plurality of electric power buses or a plurality of points of the electric power bus through series connection or parallel connection between the temperature sensing optical fibers, the temperature sensing optical fiber is laid in the conductor body of the electric power bus through an embedding tool, the laying by utilizing the embedding tool is more convenient and simple, the laying speed is improved, the connection firmness is improved, the temperature sensing optical fiber is fixed when the integral position is measured during temperature measurement and can not be separated from the temperature sensing optical fiber, the developed laying mode of the temperature sensing optical, the temperature acquisition is more accurate, and the problems of the hysteresis of temperature acquisition of the temperature sensing optical fiber and the damage of the temperature sensing optical fiber by mechanical external force in the operation process are avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (5)
1. A laying method of a temperature sensing optical fiber used in a power bus temperature measurement system is characterized by comprising the following steps:
s1: processing a U-shaped channel on the narrow side surface of a bus conductor in the early stage of production of the power bus;
s2: the method has the advantages that eddy current and circulation effects of the large-current bus on the magnetic metal material are avoided, the optical fiber protective sleeve is demagnetized, or the optical fiber protective sleeve is made of weak magnetic metal or nonmetal materials;
s3: inserting the optical fiber protective sleeve into the U-shaped channel of the bus conductor through a laying and embedding tool;
s4: temperature sensing optical fibers are arranged in the optical fiber protective sleeve in a penetrating mode, two ends of each temperature sensing optical fiber are connected with detachable optical fiber connectors, and a plurality of groups of temperature measuring points are established by connecting a plurality of groups of optical fiber connectors in parallel or in series;
s5: pouring or assembling an insulating layer of the power bus to fix the position of the insulating layer;
s6: after the whole power bus is installed on site, two ends of the temperature sensing optical fiber are in contact with the optical fiber temperature measuring system, and the temperature of the buses is measured simultaneously through the optical fiber temperature measuring host.
2. The method as claimed in claim 1, wherein in S1, the U-shaped channel has a bottom arc opening with a diameter larger than that of the top opening, the U-shaped channel has an arc opening with a diameter slightly larger than that of the fiber protection sleeve, the top opening is smaller than that of the fiber protection sleeve, the fiber protection sleeve is inserted into the U-shaped channel to avoid separation, and the temperature-sensing fiber has a diameter smaller than that of the top opening of the U-shaped channel and is placed into the U-shaped channel.
3. The laying method of the temperature-sensing optical fiber used in the power bus temperature measurement system according to claim 1, wherein in S3, the embedding tool comprises a support frame (1), a telescopic rack (2) capable of sliding up and down, a rotating shaft (3) and a pressing wheel (4), the bottom of the support frame (1) is fixed at two sides of the bus conductor, the telescopic rack (2) is installed on the support frame (1) at the two sides, the rotating shaft (3) is inserted into the bearings of the two telescopic racks (2), and the pressing wheel (4) fixed with the rotating shaft (3) is sleeved on the outer portion of the rotating shaft (3);
the utility model discloses a bus conductor, including optic fibre protective sheath, U type passageway, the U type passageway is placed on the optic fibre protective sheath, pinch roller (4) are located the port top of optic fibre protective sheath, descend through flexible frame (2) of control both sides, until the arc opening of the U type passageway of impressing the one end of optic fibre protective sheath in, the other end can upwarp, through the synchronous motion of optic fibre protective sheath and bus conductor, the relative optic fibre protective sheath of its pinch roller (4) removes, impress the one end of follow-up perk to the arc opening of U type passageway in, accomplish laying of optic fibre protective sheath.
4. The method according to claim 1, wherein in step S4, one end of the temperature sensing optical fiber is moved to one end of the optical fiber protective sheath inserted into the U-shaped channel, and enters the arc opening through the upper opening of the U-shaped channel, and the port of the temperature sensing optical fiber penetrates through the optical fiber protective sheath by moving.
5. The method of claim 1, wherein in step S6, the temperature sensing optical fiber is directly laid inside the conductor body of the power bus via a processed U-shaped groove, the temperature sensing optical fiber is directly measured by the temperature sensing optical fiber, not by the temperature of the bus insulation layer, and the optical fiber temperature measurement host measures the temperature of the plurality of power buses or a plurality of points of the power buses by connecting the temperature sensing optical fibers in series or in parallel.
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Cited By (1)
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| CN114577362A (en) * | 2021-09-27 | 2022-06-03 | 常州亚盾测控技术有限公司 | Intelligent bus optical fiber type laying method and online monitoring system |
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