CN108534908A - Transformer oil surface temperature sensor - Google Patents
Transformer oil surface temperature sensor Download PDFInfo
- Publication number
- CN108534908A CN108534908A CN201810246089.8A CN201810246089A CN108534908A CN 108534908 A CN108534908 A CN 108534908A CN 201810246089 A CN201810246089 A CN 201810246089A CN 108534908 A CN108534908 A CN 108534908A
- Authority
- CN
- China
- Prior art keywords
- transformer
- surface temperature
- sensor body
- sensor
- oil surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
Abstract
The present invention provides a kind of transformer oil surface temperature sensors, belong to power transformer technical field, including sensor body, sensor body is hollow structure, sensor body is equipped with mounting surface, mounting surface is equipped with multiple magnet and sensing element for adsorbing transformer to be measured, the circuit board being electrically connected with sensing element is equipped in sensor body, transformer oil surface temperature sensor provided by the invention, under suction-operated of the magnet to oil tank of transformer, sensing element and oil tank of transformer fit closely, ensure that sensing element is in contact with oil tank of transformer when assembly, it is directly adsorbed on oil tank of transformer when the sensor installation of this structure, it is simple and fast, also it is not limited by installation site, it is accurate to test effect.
Description
Technical field
The invention belongs to power transformer technical fields, are to be related to a kind of transformer oil surface temperature sensing more specifically
Device.
Background technology
The switching signal that most domestic transformer is run using oil surface temperature (top-oil temperature) as protection transformer safety,
Even trip protection is protected by guarding top-oil temperature to reach using oil surface temperature as the basis for estimation of monitoring device of transformer
Hinder the purpose of transformer safety operation.Currently, using conventional oil surface temperature meter monitoring transformer oil surface temperature there are some not
Foot：Installation is complicated and installation site is limited, and general transformer reserves two temperature meter bases, while also cannot achieve transformer part
The provisional monitoring of overheat, for the transformer of charging operation, conventional oil surface temperature signal is occupied, newly increases
Synthesis on-line monitoring system cannot achieve the monitoring to oil surface temperature.
Invention content
The purpose of the present invention is to provide a kind of transformer oil surface temperature sensors, to solve oil existing in the prior art
The technical problem that surface thermometer installation is complicated and installation site is limited.
To achieve the above object, the technical solution adopted by the present invention is：A kind of transformer oil surface temperature sensor is provided, is wrapped
Include the sensor body of hollow structure, the sensor body is equipped with mounting surface, and the mounting surface is equipped with sensing element and more
It is a for adsorbing the magnet of oil tank of transformer to be measured, be equipped in the sensor body and be electrically connected with the sensing element
Circuit board.
Further, further include the temperature-sensitive pedestal being fixedly connected with the sensor body, the temperature-sensitive pedestal is across institute
Mounting surface is stated, the sensing element is set on the temperature-sensitive pedestal.
Further, the temperature-sensitive pedestal is T-type structure, and the small end of the temperature-sensitive pedestal passes through the mounting surface, big end
Set on the inside of the sensor body, the sensing element is connect across the temperature-sensitive pedestal with the circuit board.
Further, the temperature-sensitive pedestal is fixedly connected by heat-insulated silica gel embedding with the sensor body.
Further, the circuit board compresses the heat-insulated silica gel, and is connected by bolt and sensor body fastening
It connects.
Further, the sensor body further includes the waterproof connector being connected to the inner cavity of the sensor body, institute
It states circuit board and is connected with signal-transmitting cable, the signal-transmitting cable passes through the waterproof connector.
Further, the sensor body is externally provided with display panel, the signal-transmitting cable and the display panel
Connection.
Further, the mounting surface is equipped with the mounting groove for magnet described in fixed placement, and the mounting groove is distributed in
On the mounting surface.
Further, the sensor body includes shell and the lid on the shell, the lid with it is described
Shell is clamped, and the lid is opposite with the mounting surface.
Further, the shell is metallic article.
The advantageous effect of transformer oil surface temperature sensor provided by the invention is：Compared with prior art, of the invention
Transformer oil surface temperature sensor can be neatly by transformer oil surface temperature sensor by the way that magnet is arranged on mounting surface
Mounted on any portion of oil tank of transformer, while sensing element is also set on mounting surface, in suction of the magnet to oil tank of transformer
Under attached effect, sensing element and oil tank of transformer fit closely, and ensure that sensing element is in contact with oil tank of transformer when assembly,
It is directly adsorbed on oil tank of transformer when the sensor installation of this structure, it is simple and fast, also do not limited by installation site
System, test effect are accurate.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only the present invention some
Embodiment for those of ordinary skill in the art without having to pay creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the sectional view of transformer oil surface temperature sensor provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of the mounting surface of transformer oil surface temperature sensor provided in an embodiment of the present invention；
Fig. 3 is enlarged drawing at A in Fig. 2；
Fig. 4 is the assembling schematic diagram of transformer oil surface temperature sensor provided in an embodiment of the present invention.
Wherein, each reference numeral in figure：
100- transformer oil surface temperature sensors；1- sensor bodies；11- mounting surfaces；111- magnet；The sensitive members of 112-
Part；113- mounting grooves；12- circuit boards；13- waterproof connectors；14- shells；15- lids；2- temperature-sensitive pedestals；3- heat-insulated silica gels；31-
Bolt；200- oil tank of transformer.
Specific implementation mode
In order to make technical problems, technical solutions and advantages to be solved be more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
It should be noted that when element is referred to as " being fixed on " or " being set to " another element, it can be directly another
On one element or it is connected on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on ... shown in the drawings or position are closed
System, is merely for convenience of description of the present invention and simplification of the description, not indicating or implying the indicated device or element must have
Specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
Also referring to Fig. 1 to Fig. 4, now transformer oil surface temperature sensor 100 provided by the invention is illustrated.One
Kind transformer oil surface temperature sensor 100 includes the sensor body 1 of hollow structure, and sensor body 1 is equipped with mounting surface 11,
Mounting surface 11 is equipped with sensing element 112 and multiple magnet 111 for adsorbing oil tank of transformer 200, is set in sensor body 1
There is the circuit board 12 being electrically connected with sensing element 112.
Transformer oil surface temperature sensor 100 provided by the invention, compared with prior art, by being set on mounting surface 11
Magnet 111 is set, transformer oil surface temperature sensor 100 can be flexibly effectively installed on to any portion of oil tank of transformer 200
Point, it is used for the temperature of each position of test transformer fuel tank 200, sensing element 112 is set to mounting surface 11 with magnet 111
On, miniature armouring Pt100 can be used in sensing element, in magnet 111 under the suction-operated of oil tank of transformer 200, sensing element
112 fit closely with oil tank of transformer 200, and sensing element 112 is in contact with oil tank of transformer 200 when assembly, while installing letter
It is single quick, mounting surface 11 need to only be contacted with oil tank of transformer 200, under the influence of a magnetic field, you can steady with oil tank of transformer 200
Surely it assembles, this assembly is not also limited by installation site, and test effect is also accurate.Transformer oil surface temperature sensor 100
Installation is simple, and installation site is unrestricted, can in any position of oil tank of transformer 200 monitor run in real time transformer
Oil surface temperature can find the exception of transformer oil surface temperature in time, improve oil-immersed transformer reliability of operation, and
The degree of protection of transformer oil surface temperature sensor 100 reaches IP66, can be used for outdoor long-term on-line monitoring, sensing element 112
It is cheap using armouring Pt100 materials, using extensive；Fibre optical sensor price is high, and installation is complicated, using seldom.
As the important parameter of oil-immersed transformer operation, oil surface temperature has stringent temperature alarming limit value.DL/T572-
2010《Power transformer operating standard》The limit value of middle regulation Transformer top-oil temperature：1) oil or air-cooled transformation
Device top-oil temperature is usually no more than 85 DEG C, not more than 95 DEG C；2) forced oil-circulation air-cooled transformer top-oil temperature is not generally
More than 75 DEG C, highest must not exceed 85 DEG C；3) forced oil circulation water-cooling transformer top-oil temperature is usually no more than 60 DEG C, and highest is not
It obtains more than 70 DEG C.Basis for estimation one of of the oil surface temperature as oil-immersed transformer safe operation, occur oil surface temperature it is excessively high or
Person alarm should cause immediately Repair of Transformer personnel's note that temperature once more than peak will cause transformer stop fortune
Row.The reason of causing transformer oil surface temperature anomaly include mainly：1) internal fault causes temperature anomaly, power transformer interior fault
Such as turn-to-turn short circuit or layer short circuit, coil discharges to screen, and inner lead conductor joint heating, multipoint earthing of iron core makes vortex increase
Heat, the leakage magnetic fluxs such as zero sequence out-of-balance current and ironware fuel tank such as are formed into a loop and generate heat at the factors when causing transformer temperature exception,
It will also be acted along with gas or differential protection, and be also possible to make explosion stack or pressure relief valve oil spout, this time-varying when failure is serious
Depressor should be stopped running immediately and be checked.2) cooler irregular operating causes temperature anomaly, cooler irregular operating or
It breaks down such as latent oil pump shutdown, fan damage, hot channel incrustation, cooling efficiency is bad, and radiator valve is not turned on
Reason causes temperature anomaly.3) oil surface temperature indicator has error or instruction failure.
Using conventional oil surface temperature meter monitoring transformer oil surface temperature, there is also following deficiencies：1) installation is complicated, needs
The welding temperature meter seat in transformer production manufacturing process, in-site installation chronothermometer seat is interior full of oil, then temperature sensing
Device is inserted into temperature meter base.2) installation site is limited, and general transformer reserves two temperature meter bases, therefore can only install two temperature
Sensor.3) the provisional monitoring of transformer hot-spot is cannot achieve, transformer is in the process of running since leakage field may
Generate overheat in the local location of tank surface, this position can not possibly welding temperature meter seat, therefore conventional oil can not be used
Surface thermometer.4) for the transformer of charging operation, conventional oil surface temperature signal is occupied, the synthesis newly increased
On-line monitoring system cannot achieve the monitoring to oil surface temperature.
Oil surface temperature to find transformer in time is abnormal, pinpoints the problems ahead of time and takes effective precautionary measures in time,
To the service life for reducing Accident of Transformer, extending transformer, the present invention proposes a kind of magnetic adsorption type transformer oil surface temperature
Sensor 100.Sensor installation is simple, and installation site is unrestricted, can be real-time in any position of oil tank of transformer 200
The oil surface temperature of transformer, can find transformer oil surface temperature anomaly, improve oil-immersed transformer in time in monitoring operation
Reliability of operation.
Further, it please refers to Fig.1 to Fig.4, one kind as transformer oil surface temperature sensor 100 provided by the invention
Specific implementation mode, further includes the temperature-sensitive pedestal 2 being fixedly connected with sensor body 1, and temperature-sensitive pedestal 2 uses metallic article, sense
Warm pedestal 2 passes through mounting surface 11, sensing element 112 to be set on temperature-sensitive pedestal 2, and setting temperature-sensitive pedestal 2 consolidates sensing element 112
It is fixed, make the oil surface temperature of the test transformer fuel tank 200 of the stabilization of sensing element 112.Make temperature-sensitive pedestal 2 protrude from mounting surface 11 it
It is 0.5-1 millimeters upper, under the suction-operated of magnet 111, the contact for keeping temperature-sensitive pedestal 2 even closer with oil tank of transformer 200, into
And sensing element 112 is made to be contacted with oil tank of transformer 200 well, test data is more accurate.
Further, it please refers to Fig.1 to Fig.4, one kind as transformer oil surface temperature sensor 100 provided by the invention
Specific implementation mode, temperature-sensitive pedestal 2 are T-type column structure, and the small end of temperature-sensitive pedestal 2 passes through the sensor body 1 where it
Side, big end are set to the inside of sensor body 1, and sensing element 112 is connect across temperature-sensitive pedestal 2 with circuit board 12, T-type structure
Temperature-sensitive pedestal 2 be easily installed, also be conveniently fixedly connected with sensor body 1, have the function that temperature-sensitive pedestal 2 limit.
Spring is set between T-type column structure big end and sensor body 1, is mounted on by transformer oil surface temperature sensor 100
When on oil tank of transformer 200, since the extruding of mounting surface 11 and oil tank of transformer 200 causes temperature-sensitive pedestal 2 to sensor body 1
Inside retract, under the spring-force driven dual of spring, pull temperature-sensitive pedestal 2 to be moved to the direction of mounting surface 11, make temperature-sensitive pedestal 2
Holding contacts closely with oil tank of transformer 200, and sensing element 112 is also bonded with oil tank of transformer 200.
Further, it please refers to Fig.1 to Fig.4, one kind as transformer oil surface temperature sensor 100 provided by the invention
Specific implementation mode, temperature-sensitive pedestal 2 are fixedly connected by 3 embedding of heat-insulated silica gel with sensor body 1, first using heat-insulated silica gel 3
Heat-insulated silica gel 3 had elasticity before this, it is ensured that temperature-sensitive pedestal 2 is in close contact with oil tank of transformer 200, and heat-insulated silica gel 3
It is isolated with surrounding air by temperature-sensitive pedestal 2 and across the sensing element 112 of heat-insulated silica gel 3, ensures transformer oil surface temperature test
Accuracy.
Further, it please refers to Fig.1 to Fig.4, one kind as transformer oil surface temperature sensor 100 provided by the invention
Specific implementation mode, circuit board 12 compresses heat-insulated silica gel 3, and is fastenedly connected by bolt 31 and sensor body 1, by circuit board
12 are set to side of the heat-insulated silica gel 3 with respect to temperature-sensitive pedestal 2, compress heat-insulated silica gel 3 using circuit board 12, reduce transformer oil surface temperature
Spend the parts of sensor 100, transformer oil surface temperature sensor 100 is lighter, smaller, is easily installed in oil tank of transformer 200
On.
Further, it please refers to Fig.1 to Fig.4, one kind as transformer oil surface temperature sensor 100 provided by the invention
Specific implementation mode, sensor body 1 further include the waterproof connector 13 being connected to the inner cavity of sensor body 1, and circuit board 12 connects
It is connected to signal-transmitting cable, signal-transmitting cable passes through waterproof connector 13, in using for transformer oil surface temperature sensor 100
Cheng Zhong needs the data-signal by circuit board 12 to be transmitted, connect and handled with outside line, in oil tank of transformer 200
On be susceptible to oil or the liquid such as water enter in sensor body 1, waterproof connector 13, circuit are set in sensor body 1
Signal-transmitting cable on plate 12 passes through waterproof connector 13, can the good transmission of data-signal can also be prevented the liquid such as oil, water
Body enters in sensor body 1.
Further, it please refers to Fig.1 to Fig.4, one kind as transformer oil surface temperature sensor 100 provided by the invention
Specific implementation mode, sensor body 1 are externally provided with display panel, and signal-transmitting cable is connected to display panel, and circuit board 12 is straight
Connect and show signal on display panel, staff can scene directly read temperature value, it is convenient to oil tank of transformer
200 temperature is controlled.
Further, it please refers to Fig.1 to Fig.4, one kind as transformer oil surface temperature sensor 100 provided by the invention
Specific implementation mode, mounting surface 11 are equipped with the mounting groove 113 for fixed placement magnet 111, and mounting groove 113 is distributed in mounting surface
On 11, magnet 111 is positioned in mounting groove 113, ensures the stability of magnet 111, avoiding colliding with makes magnet 111 loosen and shadow
The normal work for ringing transformer oil surface temperature sensor 100, decreases 111 occupied space of magnet, reduces transformer
The volume of oil surface temperature sensor 100 keeps the installation of transformer oil surface temperature sensor 100 more flexible, not by the shadow of position
It rings.
Further, it please refers to Fig.1 to Fig.4, one kind as transformer oil surface temperature sensor 100 provided by the invention
Specific implementation mode, sensor body 1 include shell 14 and the lid 15 on shell 14, and lid 15 is clamped with shell 14,
Lid 15 is opposite with mounting surface 11, and the one side of shell 14 is as mounting surface 11, while shell 14 is also used for placing sensing element
112, circuit board 12 etc., lid 15 are covered on shell 14, and sensing element 112, circuit board 12 etc. are sealed in shell 14, are prevented
It stops loss bad, card slot is set on shell 14, corresponding to the buckle of card slot, shell 14 passes through card slot with lid 15 for setting on lid 15
It is mutually clamped with buckle.
Further, it please refers to Fig.1 and Fig. 4, one kind as transformer oil surface temperature sensor 100 provided by the invention
Specific implementation mode, shell 14 are metallic article, and the thermal conduction characteristic of metallic article is good, in the temperature of test transformer fuel tank 200
When not only can guarantee influence of the temperature to sensing element 112 in temperature sensor ontology 1, but also can timely will be in sensor body 1
Temperature distribute, ensure that test data is accurate, while metal shell can make transformer oil surface temperature sensor 100 work surely
It is fixed.Shell 14 is made using stainless steel, it can be effectively moisture-proof.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made by within principle etc., should all be included in the protection scope of the present invention.
Claims (10)
1. transformer oil surface temperature sensor, it is characterised in that：Including sensor body, the sensor body is hollow knot
Structure, the sensor body are equipped with mounting surface, and the mounting surface is equipped with sensing element and multiple for adsorbing transformation to be measured
The magnet of device fuel tank, the sensor body is interior to be equipped with the circuit board being electrically connected with the sensing element.
2. transformer oil surface temperature sensor as described in claim 1, it is characterised in that：Further include and the sensor body
The temperature-sensitive pedestal being fixedly connected, the temperature-sensitive pedestal pass through the mounting surface, the sensing element to be set on the temperature-sensitive pedestal.
3. transformer oil surface temperature sensor as claimed in claim 2, it is characterised in that：The temperature-sensitive pedestal is T-type structure,
The small end of the temperature-sensitive pedestal passes through the mounting surface, big end to be set to the inside of the sensor body, and the sensing element is worn
The temperature-sensitive pedestal is crossed to connect with the circuit board.
4. transformer oil surface temperature sensor as claimed in claim 3, it is characterised in that：The temperature-sensitive pedestal passes through heat-insulated silicon
Glue embedding is fixedly connected with the sensor body.
5. transformer oil surface temperature sensor as claimed in claim 4, it is characterised in that：The circuit board compresses described heat-insulated
Silica gel, and be fastenedly connected by bolt and the sensor body.
6. transformer oil surface temperature sensor as described in claim 1, it is characterised in that：The sensor body further include with
The waterproof connector of the interior wall connection of the sensor body, the circuit board are connected with signal-transmitting cable, the signal transmission
Cable passes through the waterproof connector.
7. transformer oil surface temperature sensor as claimed in claim 6, it is characterised in that：The sensor body is externally provided with aobvious
Show that panel, the signal-transmitting cable are connect with the display panel.
8. transformer oil surface temperature sensor as described in claim 1, it is characterised in that：The mounting surface is equipped with for fixing
The mounting groove of the magnet is placed, the mounting groove is distributed on the mounting surface.
9. transformer oil surface temperature sensor as described in claim 1, it is characterised in that：The sensor body includes shell
With the lid on the shell, the lid is clamped with the shell, and the lid is opposite with the mounting surface.
10. transformer oil surface temperature sensor as claimed in claim 9, it is characterised in that：The shell is metallic article.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246089.8A CN108534908A (en) | 2018-03-23 | 2018-03-23 | Transformer oil surface temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246089.8A CN108534908A (en) | 2018-03-23 | 2018-03-23 | Transformer oil surface temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108534908A true CN108534908A (en) | 2018-09-14 |
Family
ID=63483685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810246089.8A Pending CN108534908A (en) | 2018-03-23 | 2018-03-23 | Transformer oil surface temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108534908A (en) |
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| CN104949764A (en) * | 2015-07-22 | 2015-09-30 | 华军 | Control mechanism of thermometer for transformer |
| CN105318978A (en) * | 2014-07-21 | 2016-02-10 | 中国科学院沈阳自动化研究所 | Wireless temperature measurement system of transformer temperature rise test |
| CN205656948U (en) * | 2016-05-09 | 2016-10-19 | 国网山东省电力公司莱芜供电公司 | Transformer thermometer capillary vortex fixing device |
| CN206638307U (en) * | 2017-03-27 | 2017-11-14 | 上海置信电气非晶有限公司 | A kind of liquid level and temperature integral sensor |
-
2018
- 2018-03-23 CN CN201810246089.8A patent/CN108534908A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080010471A (en) * | 2008-01-11 | 2008-01-30 | 조호봉 | A portable temperature sensor attachment unit |
| CN103376146A (en) * | 2012-04-14 | 2013-10-30 | 扬州光鸿钢构金属实业有限公司 | Oil level indicator used for outdoor transformer |
| CN105318978A (en) * | 2014-07-21 | 2016-02-10 | 中国科学院沈阳自动化研究所 | Wireless temperature measurement system of transformer temperature rise test |
| CN104166359A (en) * | 2014-08-22 | 2014-11-26 | 国网河南省电力公司漯河供电公司 | Adsorption type transformer oil temperature monitoring alarm device and use method |
| CN104949764A (en) * | 2015-07-22 | 2015-09-30 | 华军 | Control mechanism of thermometer for transformer |
| CN205656948U (en) * | 2016-05-09 | 2016-10-19 | 国网山东省电力公司莱芜供电公司 | Transformer thermometer capillary vortex fixing device |
| CN206638307U (en) * | 2017-03-27 | 2017-11-14 | 上海置信电气非晶有限公司 | A kind of liquid level and temperature integral sensor |
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Application publication date: 20180914 |