CN102494793A - Temperature thermocouple for high-voltage and ultrahigh-voltage power cable - Google Patents
Temperature thermocouple for high-voltage and ultrahigh-voltage power cable Download PDFInfo
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- CN102494793A CN102494793A CN2011103925852A CN201110392585A CN102494793A CN 102494793 A CN102494793 A CN 102494793A CN 2011103925852 A CN2011103925852 A CN 2011103925852A CN 201110392585 A CN201110392585 A CN 201110392585A CN 102494793 A CN102494793 A CN 102494793A
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Abstract
The invention relates to a temperature thermocouple for a cable, belonging to the research field of cable tests. For detecting the temperatures of a conductor, an insulating layer and an outer sheath of a cable and ensuring the detection synchronism, the invention provides a needle-shaped thermocouple which can be used for detecting the temperatures of the conductor, the insulating layer and the outer sheath of the cable at the same time after being installed for one time; therefore one-point synchronous temperature detection can be realized, workload of the temperature detecting process is reduced, and the synchronism and the accuracy of the temperature detection are enhanced. The temperature thermocouple can be used for detecting temperature of each structural layer of a simulated cable in a high-voltage and ultrahigh-voltage XLPE (Cross Linked Polyethylene) power cable type test and preverification, can realize the effect of one-time installation and one-time detection and can avoid temperature detection deviation caused by difference among different thermocouples.
Description
Technical field
The present invention relates to the cable temperature thermocouple, belong to the cable testing research field.
Background technology
At present; The type approval test of high pressure and ultrahigh-voltage XLPE power cable with generally all adopt the cable conductor temperature in method measure analog as shown in Figure 1 loop in the design test in advance; But need realize synchro measure to the insulation course and the oversheath temperature of high pressure and ultrahigh-voltage XLPE power cable under many circumstances; Main at present T type thermocouple measurement insulation course temperature and the oversheath temperature that adopts respectively; Owing to when measuring conductor temperature, can not measure the insulation course and the oversheath temperature of same point simultaneously, measure problems such as inaccurate owing to do not measure the temperature appearance temperature in same point.Existing insulation course temperature measurement technology can only be measured the temperature of the outside surface of insulation course, can not realize the measurement to the insulation course internal temperature.And existing measurement need be installed 3 thermopairs respectively in different places, also possibly measured deviation occur owing to the difference of mounting process.
Summary of the invention
In order to overcome existing cable conductor temperature, insulation course temperature and oversheath temperature survey; The synchronism of guarantee measuring with; Ad hocly counted the needle-like thermopair that a kind of one-step installation can be measured cable conductor temperature, insulation course temperature and oversheath temperature simultaneously; Thereby realize a bit synchronous thermometric, reduced the workload of thermometric process, strengthened thermometric synchronism and accuracy.This thermopair can be used for the temperature of each structural sheet of measure analog cable in high pressure and ultrahigh-voltage XLPE power cable type approval test and preparatory the evaluation.Can realize disposable installation, disposable measurement.Can also avoid because the thermometric deviation that the difference between the different thermopairs causes.
The technical solution adopted for the present invention to solve the technical problems is: a kind of high pressure and ultrahigh voltage power cable temperature thermocouple; Comprise conductor temperature measuring unit, insulation course temperature measuring unit, external sheath layer temperature measuring unit; It is characterized in that: be disposed with external sheath layer temperature measuring unit, conductor temperature measuring unit and insulation course temperature measuring unit on the thermopair; External sheath layer temperature measuring unit and conductor temperature measuring unit are provided with certain intervals, are provided with certain intervals between conductor temperature measuring unit and the insulation course temperature measuring unit.Its beneficial effect is: can realize the temperature of cable conductor layer, insulation course and external sheath layer is realized a bulk measurement of same point, can reduce the requirement to construction technology, and can reduce the thermal field distribution that destroys cable effectively.
High pressure and ultrahigh voltage power cable temperature thermocouple as stated is characterized in that: external sheath layer temperature measuring unit and conductor temperature measuring unit be spaced apart 26mm, be spaced apart 16mm between conductor temperature measuring unit and the insulation course temperature measuring unit.Its beneficial effect is: be convenient to the test of 110kv electric pressure cable.
High pressure and ultrahigh voltage power cable temperature thermocouple as stated is characterized in that: external sheath layer temperature measuring unit and conductor temperature measuring unit be spaced apart 36mm, be spaced apart 24mm between conductor temperature measuring unit and the insulation course temperature measuring unit.Its beneficial effect is: be convenient to the test of 220kv electric pressure cable.
High pressure and ultrahigh voltage power cable temperature thermocouple as stated is characterized in that: external sheath layer temperature measuring unit and conductor temperature measuring unit be spaced apart 45mm, be spaced apart 32mm between conductor temperature measuring unit and the insulation course temperature measuring unit.Its beneficial effect is: be convenient to the test of 500kv electric pressure cable.
High pressure and ultrahigh voltage power cable temperature thermocouple as stated, it is characterized in that: said external sheath layer temperature measuring unit is provided with the extension line connector of conductor temperature measuring unit, insulation course temperature measuring unit and external sheath layer temperature measuring unit.Its beneficial effect is: unify wiring, can reduce the workload and the labour intensity of installation personnel.
High pressure and ultrahigh voltage power cable temperature thermocouple as stated, it is characterized in that: said insulation course unit and said external sheath layer unit are hollow-core construction.Its beneficial effect is: adopt hollow-core construction can draw lead.
High pressure and ultrahigh voltage power cable temperature thermocouple as stated is characterized in that: the shell of thermopair adopts the steel pipe encapsulation, adopts insulating material to insulate between shell steel pipe ground connection and 3 unit.Its beneficial effect is: can improve usage safety performance.
Description of drawings
Fig. 1 is the temperature survey situation synoptic diagram of each structural sheet of existing cable.
Fig. 2 is the external form figure of high pressure of the present invention and ultrahigh-voltage XLPE power cable special electric thermo-couple.
Fig. 3 is the synoptic diagram of practical application of the present invention.
Specific embodiment
The explanation of mark among the figure: the C-conductor element, I-insulation course unit, S-oversheath unit, 123456-is respectively connection terminal.
Below in conjunction with accompanying drawing and instance the present invention is further specified.
The physical dimension of 110kV, 220kV and the 500kV one temperature thermocouple of being recommended according to the typical structure size of high pressure and ultrahigh-voltage XLPE power cable, like following table:
To the 26mm that is spaced apart of the external sheath layer temperature measuring unit of 110kV cable and conductor temperature measuring unit, be spaced apart 16mm between conductor temperature measuring unit and the insulation course temperature measuring unit.
To the 36mm that is spaced apart of the external sheath layer temperature measuring unit of 220kV cable and conductor temperature measuring unit, be spaced apart 24mm between conductor temperature measuring unit and the insulation course temperature measuring unit.
To the 45mm that is spaced apart of the external sheath layer temperature measuring unit of 500kV cable and conductor temperature measuring unit, be spaced apart 32mm between conductor temperature measuring unit and the insulation course temperature measuring unit.
In the embodiment shown in fig. 3, go up hole that equals or be slightly larger than the diameter dimension of special electric thermo-couple encapsulating structure of brill at test high pressure that needs thermometric and ultrahigh voltage power cable (1), the degree of depth that requires the hole to get into conductor is not more than 2mm; Utilize the interior chip of gases at high pressure cleaning eye of air compressor; Special electric thermo-couple (2) is inserted, seal the slit in hole after the insertion, simultaneously special electric thermo-couple is fixed on the cable; Assurance is to the suitable pressure of cable conductor, and installment work is accomplished.With joint and corresponding alloy lead wire butt joint, measuring-signal is drawn.
Claims (7)
1. high pressure and ultrahigh voltage power cable temperature thermocouple; Comprise conductor temperature measuring unit, insulation course temperature measuring unit, external sheath layer temperature measuring unit; It is characterized in that: be disposed with external sheath layer temperature measuring unit, conductor temperature measuring unit and insulation course temperature measuring unit on the thermopair; External sheath layer temperature measuring unit and conductor temperature measuring unit are provided with certain intervals, are provided with certain intervals between conductor temperature measuring unit and the insulation course temperature measuring unit.
2. high pressure and ultrahigh voltage power cable temperature thermocouple according to claim 1 is characterized in that: external sheath layer temperature measuring unit and conductor temperature measuring unit be spaced apart 26mm, be spaced apart 16mm between conductor temperature measuring unit and the insulation course temperature measuring unit.
3. high pressure and ultrahigh voltage power cable temperature thermocouple according to claim 1 is characterized in that: external sheath layer temperature measuring unit and conductor temperature measuring unit be spaced apart 36mm, be spaced apart 24mm between conductor temperature measuring unit and the insulation course temperature measuring unit.
4. high pressure and ultrahigh voltage power cable temperature thermocouple according to claim 1 is characterized in that: external sheath layer temperature measuring unit and conductor temperature measuring unit be spaced apart 45mm, be spaced apart 32mm between conductor temperature measuring unit and the insulation course temperature measuring unit.
5. like claim 1,2,3 or 4 said high pressure and ultrahigh voltage power cable temperature thermocouple, it is characterized in that: said external sheath layer temperature measuring unit is provided with the extension line connector of conductor temperature measuring unit, insulation course temperature measuring unit and external sheath layer temperature measuring unit.
6. like claim 1,2,3 or 4 said high pressure and ultrahigh voltage power cable temperature thermocouple, it is characterized in that: said insulation course unit and said external sheath layer unit are hollow-core construction.
7. like claim 1,2,3 or 4 said high pressure and ultrahigh voltage power cable temperature thermocouple, it is characterized in that: the shell of thermopair adopts the steel pipe encapsulation, adopts the insulating material insulation between shell steel pipe ground connection and 3 unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103925852A CN102494793A (en) | 2011-12-01 | 2011-12-01 | Temperature thermocouple for high-voltage and ultrahigh-voltage power cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103925852A CN102494793A (en) | 2011-12-01 | 2011-12-01 | Temperature thermocouple for high-voltage and ultrahigh-voltage power cable |
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| CN102494793A true CN102494793A (en) | 2012-06-13 |
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| CN2011103925852A Pending CN102494793A (en) | 2011-12-01 | 2011-12-01 | Temperature thermocouple for high-voltage and ultrahigh-voltage power cable |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634470A (en) * | 2015-02-06 | 2015-05-20 | 华南理工大学 | Method for accurately measuring temperature of cable conductor |
| CN105222909A (en) * | 2015-09-21 | 2016-01-06 | 河北省电力勘测设计研究院 | Power Cable Joint Temperature computing method |
| CN108405913A (en) * | 2018-02-23 | 2018-08-17 | 华南理工大学 | A kind of cable automatic punching method that can be accurately positioned |
| CN108447600A (en) * | 2018-04-12 | 2018-08-24 | 天津大学 | Naval vessel high heat conduction low-temperature-rise degaussing cable and its manufacturing method |
| CN109975353A (en) * | 2019-04-08 | 2019-07-05 | 中国科学技术大学 | A kind of high voltage power cable core heating control and internal and external temperature field coupling evolution mechanism study platform |
| CN111721801A (en) * | 2020-05-20 | 2020-09-29 | 江苏方天电力技术有限公司 | Heat conduction sensor based on heat conduction gradient |
| CN117092442A (en) * | 2023-10-17 | 2023-11-21 | 江苏亨通高压海缆有限公司 | Submarine cable temperature fault test equipment |
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| CN2720578Y (en) * | 2004-08-25 | 2005-08-24 | 宝胜科技创新股份有限公司 | Cable-type thermocouple temp.-measuring electric power cable |
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| CN201466652U (en) * | 2009-07-24 | 2010-05-12 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent cable accessory capable of detecting hot points |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2004088338A1 (en) * | 2003-04-04 | 2004-10-14 | Lg Cable Ltd. | Apparatus and method for evaluating underground electric power cables |
| CN2720578Y (en) * | 2004-08-25 | 2005-08-24 | 宝胜科技创新股份有限公司 | Cable-type thermocouple temp.-measuring electric power cable |
| CN2807223Y (en) * | 2005-07-18 | 2006-08-16 | 北京工业大学 | Temperature measurer for energy source well for geothermal heat pump system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634470A (en) * | 2015-02-06 | 2015-05-20 | 华南理工大学 | Method for accurately measuring temperature of cable conductor |
| CN105222909A (en) * | 2015-09-21 | 2016-01-06 | 河北省电力勘测设计研究院 | Power Cable Joint Temperature computing method |
| CN105222909B (en) * | 2015-09-21 | 2018-02-16 | 河北省电力勘测设计研究院 | Power Cable Joint Temperature computational methods |
| CN108405913A (en) * | 2018-02-23 | 2018-08-17 | 华南理工大学 | A kind of cable automatic punching method that can be accurately positioned |
| CN108405913B (en) * | 2018-02-23 | 2019-06-18 | 华南理工大学 | A kind of cable automatic punching method that can be accurately positioned |
| CN108447600A (en) * | 2018-04-12 | 2018-08-24 | 天津大学 | Naval vessel high heat conduction low-temperature-rise degaussing cable and its manufacturing method |
| CN109975353A (en) * | 2019-04-08 | 2019-07-05 | 中国科学技术大学 | A kind of high voltage power cable core heating control and internal and external temperature field coupling evolution mechanism study platform |
| CN111721801A (en) * | 2020-05-20 | 2020-09-29 | 江苏方天电力技术有限公司 | Heat conduction sensor based on heat conduction gradient |
| CN117092442A (en) * | 2023-10-17 | 2023-11-21 | 江苏亨通高压海缆有限公司 | Submarine cable temperature fault test equipment |
| CN117092442B (en) * | 2023-10-17 | 2024-01-26 | 江苏亨通高压海缆有限公司 | Submarine cable temperature fault test equipment |
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Application publication date: 20120613 |