CN204831376U - Oil potential temperature sensor - Google Patents
Oil potential temperature sensor Download PDFInfo
- Publication number
- CN204831376U CN204831376U CN201520582063.2U CN201520582063U CN204831376U CN 204831376 U CN204831376 U CN 204831376U CN 201520582063 U CN201520582063 U CN 201520582063U CN 204831376 U CN204831376 U CN 204831376U
- Authority
- CN
- China
- Prior art keywords
- oil
- temperature
- oil temperature
- level sensor
- temperature level
- 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.)
- Active
Links
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to a sensor field, in particular to oil potential temperature sensor. Including the casing for temperature conductivity, fixed and protection, temperature sensor for measure the oil temperature, the inside printed circuit board that is equipped with of casing, temperature sensor sets up on printed circuit board, last tongue tube and the home sensor lead wire of still being provided with of printed circuit board. The casing adopts 304 stainless steels, adopts the pore free welded technique. This oil potential temperature sensor can the simultaneous measurement oil level temperature and oil temperature of transformer, the magnesium hydroxide particles filling layer has a very good heat conductivility, can be quick accurate pass to the temperature sensor of the internal portion of protective housing through the magnesium hydroxide particles filling layer through the protection casing with transformer oil face temperature to guarantee oil temperature measuring accuracy.
Description
Technical field
The utility model relates to sensor field, particularly a kind of oil temperature level sensor.
Background technology
Power transformer is one of electrical equipment important in electric system, and its operation conditions is very big to power system security reliability service relation.According to related data statistics, between 1990-1999, the mean rate of failure of 110kV and above transformer is about 0.69%.Wherein because of winding overheating operation, cause insulation ag(e)ing, Transformer Winding punctures, burnout failure occupies suitable vast scale.For oil-filled transformer, the life-span of its life-span reality mainly solid insulation (fibrous paper).Impel the principal element of insulation ag(e)ing to be temperature, moisture and oxygen, wherein when transformer belt load, the effect of thermal effect is the most outstanding.Can say that thermal effect is the deciding factor that transformer is aging.That is the heat ageing speed of Transformer Winding insulation is relevant with the hot(test)-spot temperature of winding.By the oil-immersed power transformer of GB1094 power transformer standard design, GB/T15164-94 " oil-immersed power transformer load directive/guide " specifies that its hot(test)-spot temperature reference value is 98 DEG C, and the relative ageing rate namely insulated at this temperature is 1.Within the scope of 80 ~ 140 DEG C, temperature often increases 6K, and ageing rate just doubles (so-called 6K rule).The relative heat ageing rate of oil-filled transformer and the relation of temperature are listed in table one, can be known by table one and find out, transformer runs 1h at 140 DEG C, its aging amount is equivalent to run 128h at 98 DEG C, running temperature and the controlled winding hottest spot temperature of visible suitable reduction winding are no more than allowable temperature, very important to the serviceable life extending winding insulation thing.
Large-scale, cooling system are adopted to the oil immersed power transformer of strong oil circulation, the time constant of oil is about 1 ~ 2h, and the time constant of winding is very little, and only have an appointment 5 ~ 10min, and difference of them is larger.So due to heat transfer process impact, current great majority are all adopt to detect oily temperature of top to infer winding temperature, therefore, the measuring accuracy of oil surface temperature will directly affect the temperature of winding, thus adopts the oil temperature level sensor of energy fast and accurate measurement transformer oil surface temperature just to seem extremely important.
Normal transformer oil level is too low, may cause protection misoperation, time serious, transformer coil or lead-in wire pasta even can be made to expose, cause dielectric breakdown accident.Oil level is too high, then easily cause oil spilling.Except leakage of oil, oil level declines or rises and depends primarily on oil temperature decline or rise.The volume of transformer oil, directly by oil temperature variable effect, causes the pasta of oil ga(u)ge to be elevated, so when charge of oil, and must in conjunction with the proper height selecting oiling when ground temperature.
Be directed to above designed by the too low or too high negative effect of the oil level that arrives, therefore the measurement of oil level seems very important.
Now oil level on the market and fuel temperature measurement are all separately measure, and therefore design a kind of sensor simultaneously measuring oil temperature and oil level and just seem extremely important.
Summary of the invention
The utility model will solve numerous oil temperature level sensor on the market and measure inaccurate, can not measure oil temperature and oil level simultaneously, provide the oil temperature level sensor that high measurement accuracy is taked in a kind of employing.
For achieving the above object, the technical solution of the utility model is:
A kind of oil temperature level sensor, comprises housing, for temperature conduction, fixing and protection; Temperature sensor, for measuring oil temperature; Enclosure interior is provided with printed circuit board, and described temperature sensor is arranged on a printed circuit board, printed circuit board is also provided with tongue tube and internal sensor lead-in wire.Described housing adopts 304 stainless steels, adopts seamless welding technology.
Further, described housing skin is provided with metal floater.Metal floater, according to oil level, fluctuates, thus controls the break-make of tongue tube.
Further, described housing skin is provided with centring ring.Centring ring, for limiting metal floater stroke, oil temperature level sensor can fill many group centring rings thus realize measuring the output of multiple spot oil level.
Further, be provided with packed layer between described temperature sensor and described housing, packing material is magnesium oxide particle.Magnesium oxide particle has extraordinary heat conductivility, fast and accurately transformer oil surface temperature can be passed to the temperature sensor of protective housing inside through magnesium oxide particle packed layer by protective housing, thus ensures the accuracy of fuel temperature measurement.
Further, described enclosure interior is provided with sealant structure.
Further, described sealant structure is AB structural adhesive layer.AB glue sealant ensures stability and the grease proofness of the inside printed circuit board of housing.
Further, internal sensor lead-in wire and external sensor lead-in wire is provided with above described sensor.
Further, described internal sensor goes between and described external sensor goes between is connected by the plug be arranged on above oil temperature level sensor, and described plug is aviation plug.The make-and-break signal of tongue tube is passed to external detection instrument by aviation plug and external sensor lead-in wire by internal sensor lead-in wire.
Further, the quantity of described tongue tube and/or metal floater is one or more, and each metal floater is equipped with centring ring up and down.
The beneficial effects of the utility model are: this oil temperature level sensor can the simultaneously oil surface temperature of measuring transformer and oil level; magnesium oxide particle packed layer has extraordinary heat conductivility; fast and accurately transformer oil surface temperature can be passed to the temperature sensor of protective housing inside by protective housing by magnesium oxide particle packed layer, thus ensure the accuracy of fuel temperature measurement.
Accompanying drawing explanation
Fig. 1 is oil temperature level sensor structural drawing;
Wherein: 1-housing, 2-printed circuit board, 3-temperature sensor, 4-centring ring, 5-metal floater, 6-packed layer, 7-tongue tube, 8-sealant structure, 9-internal sensor lead-in wire, 10-plug, 11-external sensor lead-in wire.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the technical solution of the utility model is done more specifically bright.
As shown in Figure 1, a kind of oil temperature level sensor, comprises housing, for temperature conduction, fixing and protection; Temperature sensor, for measuring oil temperature; It is characterized in that, enclosure interior is provided with printed circuit board, and described temperature sensor is arranged on a printed circuit board, printed circuit board is also provided with tongue tube and internal sensor lead-in wire.Housing 1 adopts 304 stainless steels, is welded by seamless welding technology.Like this can the sealing of assurance device preferably, also ensure that the durability of device largely simultaneously.Housing 1 skin is provided with metal floater 5, can fluctuate, thus control the signal break-make of tongue tube 7 according to oil level height.Housing 1 skin is also provided with centring ring 4, for limiting the stroke of metal floater 5, oil temperature level sensor can fill many group centring rings 4 thus realizing measuring the output of multiple spot oil level.Be provided with packed layer 6 between temperature sensor 3 and housing 1, packing material is magnesium oxide particle.Magnesium oxide particle has extraordinary heat conductivility, fast and accurately transformer oil surface temperature can be passed to the temperature sensor 3 of housing 1 inside through packed layer 6 by housing 1, thus ensures the accuracy of fuel temperature measurement.Housing 1 inside is provided with sealant structure 8, and sealant structure 8 is AB structural adhesive layer.AB glue sealant ensures to be provided with internal sensor lead-in wire 9 and external sensor lead-in wire 11 above the stability of inside printed circuit board 2 of housing 1 and grease proofness oil temperature level sensor, and internal sensor lead-in wire 9 and described external sensor are gone between and 11 to be connected by the plug 10 be arranged on above oil temperature level sensor.The make-and-break signal of tongue tube 7 is arrived external detection instrument by plug 10 and external sensor lead-in wire biography 11 by internal sensor lead-in wire 9, and plug 10 is aviation plug.Tongue tube 7 is provided with two, and the quantity of metal floater 5 is four, and each metal floater about 5 is equipped with centring ring 4.
The present embodiment oil temperature level sensor described in the utility model; oil surface temperature and the oil level of transformer can be monitored simultaneously; the protective housing of this oil temperature level sensor adopts 304 stainless steels; adopt special seamless welding technology, while the sealing of assurance device, also ensure that the durability of device largely.Protective housing inside adopts magnesium oxide particle packed layer as packing material; magnesium oxide particle packed layer has extraordinary heat conductivility; fast and accurately transformer oil surface temperature can be passed to the temperature sensor of protective housing inside by protective housing by magnesium oxide particle packed layer, thus ensure the accuracy of fuel temperature measurement.AB glue sealant ensures stability and the grease proofness of the inside printed circuit board of housing.The design of aviation plug ensure that the stability of Signal transmissions.
To one skilled in the art, by illustrating above and can being expressly understood specific embodiment very much.The utility model does not limit therewith, all according to technological thought of the present utility model, and the difference change that technical scheme basis is done, all falls within protection domain of the present utility model.
Claims (10)
1. an oil temperature level sensor, comprises housing, for temperature conduction, fixing and protection; Temperature sensor, for measuring oil temperature; It is characterized in that, enclosure interior is provided with printed circuit board, and described temperature sensor is arranged on a printed circuit board, printed circuit board is also provided with tongue tube and internal sensor lead-in wire.
2. oil temperature level sensor according to claim 1, is characterized in that, described housing skin is provided with metal floater, for controlling tongue tube work.
3. oil temperature level sensor according to claim 2, is characterized in that, described housing skin is provided with centring ring, for limiting the stroke range of metal floater.
4. oil temperature level sensor according to claim 1, is characterized in that, is provided with packed layer between described temperature sensor and described housing.
5. oil temperature level sensor according to claim 1, is characterized in that, described enclosure interior is provided with sealant structure, for grease proofing, and protective housing inner member.
6. oil temperature level sensor according to claim 5, is characterized in that, described sealant structure is AB structural adhesive layer.
7. the oil temperature level sensor according to claim 1-6 any one, is characterized in that, described oil temperature level sensor top is provided with internal sensor lead-in wire and external sensor lead-in wire.
8. oil temperature level sensor according to claim 7, is characterized in that, described internal sensor lead-in wire is gone between with described external sensor and is connected by plug.
9. oil temperature level sensor according to claim 8, is characterized in that, described plug is aviation plug.
10. oil temperature level sensor according to claim 3, is characterized in that, the quantity of described tongue tube and/or metal floater is one or more, and each metal floater is equipped with centring ring up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520582063.2U CN204831376U (en) | 2015-08-05 | 2015-08-05 | Oil potential temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520582063.2U CN204831376U (en) | 2015-08-05 | 2015-08-05 | Oil potential temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204831376U true CN204831376U (en) | 2015-12-02 |
Family
ID=54688968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520582063.2U Active CN204831376U (en) | 2015-08-05 | 2015-08-05 | Oil potential temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204831376U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052732A (en) * | 2016-07-13 | 2016-10-26 | 安徽皖宏电气设备有限公司 | Integrated oil-immersed transformer oil level temperature pressure sensor |
| CN110672156A (en) * | 2019-10-18 | 2020-01-10 | 哈尔滨朗昇电气股份有限公司 | Transformer state monitoring device with data acquisition and communication alarm functions |
-
2015
- 2015-08-05 CN CN201520582063.2U patent/CN204831376U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052732A (en) * | 2016-07-13 | 2016-10-26 | 安徽皖宏电气设备有限公司 | Integrated oil-immersed transformer oil level temperature pressure sensor |
| CN110672156A (en) * | 2019-10-18 | 2020-01-10 | 哈尔滨朗昇电气股份有限公司 | Transformer state monitoring device with data acquisition and communication alarm functions |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111722656B (en) | Transformer temperature control method and transformer | |
| CN105242189B (en) | IGBT health status monitoring methods based on collection emitter-base bandgap grading saturation voltage drop and solder layer voidage | |
| CN102788645A (en) | Infrared monitoring system for temperature rise of electric connecting point of electrical equipment and monitoring method | |
| CN204831376U (en) | Oil potential temperature sensor | |
| US20200191647A1 (en) | High-speed train gearbox sensing device | |
| CN107918067A (en) | The internal temperature rise test method and device of a kind of aluminium electrolutic capacitor | |
| CN111474328A (en) | Transformer oil detection device and oil-filled electrical equipment | |
| CN102589742A (en) | Oil-immersed power transformer top-level oil temperature monitoring method based on thermistor | |
| CN102589747A (en) | Method for monitoring top-layer oil temperature of oil-immersed power transformer based on optical fiber Bragg grating | |
| CN105318935A (en) | Wide-range mutual-induction type liquid metal liquidometer | |
| CN207587512U (en) | A kind of mechanism of measuring transformer top-oil temperature | |
| CN104316134B (en) | Oil-immersed and high-voltage Oil-filled Electrical Equipments position monitoring method | |
| CN202869691U (en) | Adjustable optical fiber Bragg grating sensor for monitoring temperature of top oil of oil-immersed power transformer | |
| CN202547823U (en) | Adjustable optical fiber Bragg grating sensor for monitoring temperature of top oil of oil-immersed power transformer | |
| CN204668919U (en) | A kind of intelligent transformer protective device | |
| CN203178415U (en) | Transformer testing apparatus | |
| CN208608036U (en) | A kind of self-test self-adjusting type oil-immersed transformer | |
| CN104880235A (en) | Indicator for measuring oil level inside transformer sleeve through electric field and measurement method thereof | |
| CN103196572A (en) | Method for improving main transformer remote-reading thermometer accuracy and remote-reading thermometer | |
| CN204100960U (en) | Air preheater fanning strip actuating mechanism displacement detector | |
| CN106802174A (en) | A kind of liquid level and temperature integral sensor | |
| CN202869686U (en) | Adjustable thermistor temperature sensor for monitoring temperature of top oil of oil-immersed power transformer | |
| CN102608407A (en) | Device for detecting stabilizing voltage value of voltage stabilizing diode | |
| CN202332743U (en) | Circuit breaker suitable to automatically calibrate current parameter | |
| CN208399629U (en) | A kind of temperature of oil in transformer monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |