CN103649699A - 温度计 - Google Patents
温度计 Download PDFInfo
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- CN103649699A CN103649699A CN201280033856.8A CN201280033856A CN103649699A CN 103649699 A CN103649699 A CN 103649699A CN 201280033856 A CN201280033856 A CN 201280033856A CN 103649699 A CN103649699 A CN 103649699A
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- thermometer
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- housing
- sleeve
- hygrosensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/42—Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/42—Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
- G01K2007/422—Dummy objects used for estimating temperature of real objects
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
Abstract
本发明涉及一种温度计、特别是用于确定电力变压器的绕组温度的温度计。本发明重要的方面在此在于,在用于确定电力变压器的绕组温度的温度计中将电温度探测器以及机械的温度探测器和加热元件设置在一个由导热的材料制成的耦联件中并且在耦联件的外壁和壳体的内壁之间设置由热稳定的材料制成的隔绝套筒,其中,壳体、隔绝套筒和耦联件形成同轴的结构、而不留下气隙,使得因此提供在各单个构件之间、即在耦联件、隔绝套筒和管状的壳体之间的可规定的热传递。
Description
技术领域
本发明涉及一种温度计,特别是用于确定电力变压器的绕组温度。
背景技术
由DE8911078U1已知一种由现有技术已知的方法,该方法涉及间接测量在功率变压器上的绕组温度。在该方法中,在用于装入填充有液体的变压器槽中的浸入式套筒中设置有一个空心的探测器,该探测器被绝缘软管包围,该绝缘软管又被以加热电阻缠绕,该加热电阻本身被另一绝缘软管包套。借助电流变换器与变压器负载成比例的电流通过加热电阻被引导,该电流的大小这样地按加热电阻和朝向探测器和冷却剂的热传递进行设定,使得由探测器测量的温度等于功率变压器的相应平均的或者最大的绕组温度。
浸入式探测器在此这样地装入变压器槽中,使得浸入式套筒浸入变压器的冷却液中。在这里,在变压器绕组和冷却液之间的温度差取决于在该绕组中的相应电流。因此,变压器配设有一个电流变换器,该电流变换器采集流过变压器的电流。该电流变换器的次级电流现在与流过变压器的电流成比例。所述的信号流接着流过加热电阻,该加热电阻配设于温度探测器并且由此相对于实际测量的油温产生与相应的变压器负载相应的显示曲线。由于在投入运行之前进行的校准,人们可以按照该间接的方式获得在给定的功率变压器电流负载时的平均或最大绕组温度的显示、亦即显示连接在受热的温度探测器下游的显示仪器到在功率变压器之内的过程的热图像中。显示便可以在测量信号的相应加强之后在或多或少远离的控制室中进行。备选地也可能的是,在控制和调节设备中对有关的测量值继续进行电子处理,例如处理成光学警报信号和/或声学警报信号。
用于模拟和显示功率变压器绕组温度的该方法在原则上在实践中已证明是令人满意的。其中安装温度计,该温度计间接地经由与变压器的填充物分开的填充物被加载变压器填充物的温度。用于该方法的温度计因此装备有加热装置、机械探测器和电探测器。加热装置具有与周围的、和液体接触的壳体管所想要的热接触。该接触由聚合物包套物以及气隙形成。加热装置分成两个加热元件,这两个加热元件中的一个加热元件包围设置在内部的机械式温度探测器,而第二加热元件包围设置在内部的电子温度探测器。
与周围的、和液体接触的壳体管所想要的热接触决定性地由气隙和气热阻决定。不过在该气隙中的空气不是气密地封闭。不过空气的热阻本身又取决于其密度和因而直接取决于压力以及温度。因此,在DE8911078U1中描述的温度计随着空气压力或温度的变化而改变其热力特性参数。此外不利的是,所描述的温度计将机械的温度探测器和电温度探测器相互热分开。在每个部分系统的公差之内的偏差由此导致两个温度显示值的明显差异。抑制这一点耗费显著。
发明内容
因此,本发明的目的在于,给出一种温度计,特别是用于确定电力变压器的绕组温度,在该温度计中,消除周围环境温度或气压对所确定的温度值的影响并且在此同时可以尽可能减小在电温度探测器和机械的温度探测器之间的测量值的偏差。
所述目的通过一种具有第一权利要求的特征的温度计来解决。从属权利要求在此涉及本发明的特别有利的改进方案。
本发明重要的方面在此在于,在用于确定电力变压器的绕组温度的温度计中将电温度探测器以及机械的温度探测器和加热元件设置在由导热的材料制成的耦联件中并且在耦联件的外壁和壳体的内壁之间设置由热稳定的材料制成的隔绝套筒,其中,壳体、隔绝套筒和耦联件形成同轴的结构、而不留下气隙,使得因此能够实现在各单个构件之间、即在耦联件、隔绝套筒和管状的壳体之间的可规定的热传递。加热元件、电温度探测器以及机械的温度探测器按照本发明设置在共同的良好导热的耦联件中并且相对于周围液体的热阻附加地通过固体的绝热体来形成,而在按照本发明的温度计之内在间隙中不会形成气垫,由此总体上提供一种温度计结构,该温度计结构在其热等值线路图方面明显简化并且因此最后提供更精确的测量值。
附图说明
下面应根据附图示例性地还要更详细地阐述本发明。图中:
图1示出一个按照本发明的温度计的侧向剖视图和俯视图,
图2示出一个按照本发明的温度计的俯视图。
具体实施方式
在图1中示出按照本发明的温度计1的侧向剖视图。在此,温度计1被一个外部的管状构成的壳体2包围,该壳体具有一个敞开端部3和一个封闭端部4。在壳体2之内设置由良好导热的材料制成的耦联件5,该耦联件具有多个精确匹配的凹部(这些凹部在图2中示出)用于容纳加热元件6、机械的温度探测器7以及装备有两个探测器元件的电温度探测器8。在壳体2的内壁和耦联件5的外壁之间紧密地插入一个由热稳定的材料制成的隔绝套筒9,从而因此最后在壳体2、隔绝套筒9和耦联件5之间不能形成气隙。总体上观察,由此通过壳体2、隔绝套筒9和耦联件5得到同轴的结构、而不留下气隙,使得因此提供了在各单个构件之间、即在耦联件5、隔绝套筒9和管状的壳体2之间的可规定的热传递。由此,按照本发明提供一种布置结构,该布置结构的在耦联件5内部的热阻与隔绝套筒9内部的热阻相比如此之小,使得可以认为温度计1的等温的总体结构。耦联件5在此可以例如由铝合金制成,而隔绝套筒9可以由聚醚醚酮、也称为PEEK制成。耦联件5相对于隔绝套筒9的热传递阻力和隔绝套筒9相对于壳体2的热传递阻力通过温度计1的同轴选择的结构的几何尺寸决定性地决定、不通过位于位于它们之间的气隙决定,因为该气隙保持得很小、亦即<0.1mm并且因此在观察热等值线路图时可忽略。
图2以剖视图示出按照本发明的温度计1的俯视图。从该视图可良好地看出按照本发明的温度计1的同轴结构,该温度计包括外部壳体2、与之邻接的隔绝套筒9和耦联件5,该耦联件用于容纳加热元件6、机械的温度探测器7以及电温度探测器8。最后提到的这些构件6、7和8被容纳在、特别是被推入设置在耦联件5中的多个凹部10、11和12中。加热元件6、机械的温度探测器7以及电温度探测器8到耦联件5中的简单推入在此能实现这些构件6、7和8在有缺陷或者可能存在的保养工作时特别不复杂地更换。
Claims (6)
1.用于确定电力变压器的绕组温度的温度计,
具有包括封闭端部和敞开端部的管状的壳体,其中,在该管状的壳体中设置电温度探测器以及机械的温度探测器和加热元件,
其特征在于,
所述加热元件(6)、电温度探测器(8)以及机械的温度探测器(7)设置在由良好导热的材料制成的耦联件(5)中,
在所述耦联件(5)的外壁和所述壳体(2)的内壁之间设置由热稳定的材料制成的隔绝套筒(9),并且
所述壳体(2)、隔绝套筒(9)和耦联件(5)不留下气隙地形成同轴的结构,使得因此能够达到在各单个构件之间、即在耦联件(5)、隔绝套筒(9)和管状的壳体(2)之间可规定的热传递。
2.根据权利要求1所述的温度计,其特征在于,所述耦联件(5)构成为一体的成型件,该成型件具有多个凹部(10、11和12),机械的温度探测器(7)以及电温度探测器(8)和加热元件(6)能够被推入这些凹部中、而不留下气隙。
3.根据权利要求1或2所述的温度计,其特征在于,所述耦联件(5)由与隔绝套筒(9)相比导热好多倍的材料制成。
4.根据权利要求1至3之一所述的温度计,其特征在于,所述耦联件(5)由铝合金制成。
5.根据权利要求1至4之一所述的温度计,其特征在于,所述隔绝套筒(9)由聚醚醚酮制成。
6.根据权利要求1至5之一所述的温度计,其特征在于,所述耦联件(5)的材料的内部热阻与所述隔绝套筒(9)的材料的内部热阻相比明显较小,使得由此提供温度计(1)的等温的总体结构。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011107006.4 | 2011-07-09 | ||
DE102011107006.4A DE102011107006B4 (de) | 2011-07-09 | 2011-07-09 | Thermometer |
PCT/EP2012/059790 WO2013007436A2 (de) | 2011-07-09 | 2012-05-25 | Thermometer |
Publications (1)
Publication Number | Publication Date |
---|---|
CN103649699A true CN103649699A (zh) | 2014-03-19 |
Family
ID=46210209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201280033856.8A Pending CN103649699A (zh) | 2011-07-09 | 2012-05-25 | 温度计 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20190195697A1 (zh) |
EP (1) | EP2729775A2 (zh) |
KR (1) | KR20140040800A (zh) |
CN (1) | CN103649699A (zh) |
BR (1) | BR112013031346A2 (zh) |
DE (1) | DE102011107006B4 (zh) |
RU (1) | RU2014104508A (zh) |
WO (1) | WO2013007436A2 (zh) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8911078U1 (zh) * | 1989-09-16 | 1989-11-23 | Messko Albert Hauser Gmbh & Co. Kg, 6370 Oberursel, De | |
US6086249A (en) * | 1996-11-22 | 2000-07-11 | Messko Albert Hauser Gmbh & Co | Method and apparatus for simulating and indicating the temperature of the winding of an electric power transformer |
CN1377049A (zh) * | 2002-05-09 | 2002-10-30 | 刘有斌 | 气体绝缘干式空芯电抗器 |
US20110150027A1 (en) * | 2009-12-21 | 2011-06-23 | Weiss Instruments, Inc. | Mechanical and electronic temperature reading system with built-in failure and inaccuracy detection |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB561918A (en) * | 1942-12-05 | 1944-06-09 | Parsons C A & Co Ltd | Improvements in or relating to temperature indicator devices or the like for liquid immersed electrical apparatus |
GB1161985A (en) * | 1966-07-26 | 1969-08-20 | English Electric Co Ltd | Device for Determining the Temperature of Electrical Apparatus |
US4036058A (en) * | 1976-08-05 | 1977-07-19 | Qualitrol Corporation | Hot spot thermometer |
DE4040910C2 (de) * | 1990-12-20 | 1993-11-11 | Emerson Electric Gmbh | Fühlerelement für eine temperaturabhängige Schalt-, Regel- oder Steuereinrichtung |
CA2492801A1 (en) * | 2002-07-16 | 2004-01-22 | Bunn-O-Matic Corporation | Temperature control system |
US7128467B2 (en) * | 2004-03-18 | 2006-10-31 | General Electric Company | Thermistor probe assembly and method for positioning and moisture proofing thermistor probe assembly |
DE102005020809B3 (de) * | 2005-05-04 | 2006-10-19 | Maschinenfabrik Reinhausen Gmbh | Sensor |
DE102007002369B3 (de) * | 2007-01-17 | 2008-05-15 | Drägerwerk AG & Co. KGaA | Doppeltemperatursensor |
US7520668B2 (en) * | 2007-01-24 | 2009-04-21 | Innova Electronics Corporation | Multi function thermometer |
DE102008026642B4 (de) * | 2008-06-03 | 2010-06-10 | Dräger Medical AG & Co. KG | Doppeltemperatursensor mit einem Aufnahmeelement |
US9234712B2 (en) * | 2012-07-31 | 2016-01-12 | Abb Inc. | Self-aligning plug for positioning a temperature sensor within a transformer winding |
US9046423B2 (en) * | 2012-08-01 | 2015-06-02 | Qualitrol Company, Llc | Hybrid mechanical and electrical transformer monitor |
-
2011
- 2011-07-09 DE DE102011107006.4A patent/DE102011107006B4/de not_active Expired - Fee Related
-
2012
- 2012-05-25 RU RU2014104508/28A patent/RU2014104508A/ru not_active Application Discontinuation
- 2012-05-25 WO PCT/EP2012/059790 patent/WO2013007436A2/de active Application Filing
- 2012-05-25 CN CN201280033856.8A patent/CN103649699A/zh active Pending
- 2012-05-25 EP EP12726041.2A patent/EP2729775A2/de not_active Withdrawn
- 2012-05-25 KR KR1020147000713A patent/KR20140040800A/ko not_active Application Discontinuation
- 2012-05-25 BR BR112013031346A patent/BR112013031346A2/pt not_active IP Right Cessation
- 2012-05-25 US US14/123,125 patent/US20190195697A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8911078U1 (zh) * | 1989-09-16 | 1989-11-23 | Messko Albert Hauser Gmbh & Co. Kg, 6370 Oberursel, De | |
US6086249A (en) * | 1996-11-22 | 2000-07-11 | Messko Albert Hauser Gmbh & Co | Method and apparatus for simulating and indicating the temperature of the winding of an electric power transformer |
CN1377049A (zh) * | 2002-05-09 | 2002-10-30 | 刘有斌 | 气体绝缘干式空芯电抗器 |
US20110150027A1 (en) * | 2009-12-21 | 2011-06-23 | Weiss Instruments, Inc. | Mechanical and electronic temperature reading system with built-in failure and inaccuracy detection |
Also Published As
Publication number | Publication date |
---|---|
BR112013031346A2 (pt) | 2017-09-05 |
EP2729775A2 (de) | 2014-05-14 |
KR20140040800A (ko) | 2014-04-03 |
RU2014104508A (ru) | 2015-08-20 |
US20190195697A1 (en) | 2019-06-27 |
WO2013007436A2 (de) | 2013-01-17 |
WO2013007436A3 (de) | 2013-05-02 |
DE102011107006A1 (de) | 2013-01-10 |
DE102011107006B4 (de) | 2015-06-11 |
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