CN103270398A - Oil level indicator with electronic output - Google Patents
Oil level indicator with electronic output Download PDFInfo
- Publication number
- CN103270398A CN103270398A CN2010800709361A CN201080070936A CN103270398A CN 103270398 A CN103270398 A CN 103270398A CN 2010800709361 A CN2010800709361 A CN 2010800709361A CN 201080070936 A CN201080070936 A CN 201080070936A CN 103270398 A CN103270398 A CN 103270398A
- Authority
- CN
- China
- Prior art keywords
- oil level
- level indicator
- oil
- magnet
- bar
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
- G01F23/38—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using magnetically actuated indicating means
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- 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
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
Abstract
An oil level indicator comprising a float connected to a rod which are suitable to move within an oil filled vessel of an associated power equipment; a magnet is connected to the rod, and a magnetic sensor is provided in front of the magnet 6 for detecting a change or variation of the magnetic field provided by the magnet when the float 1 and the rod 2 move due to a change of the oil level inside the vessel. The magnetic sensor comprises a microchip set inside an electronic board (7) for giving a digital output indicative of the change of oil level inside the vessel.
Description
The present invention relates to a kind of oil level indicator for oil-filled electric device.
More specifically, the present invention relates to that a kind of have can be by the oil level indicator of the digital signal of long-distance transmissions.
The invention still further relates to a kind of power transformer that comprises such oil level indicator.
The electric device of housing insulation oil, for example transformer etc. generally includes oil-filled expansion vessel, and this oil-filled expansion vessel is configured to compensate by the unexpected variation of temperature in the inevitable change of the inner oil volume that produces of device.
Provide in advance being used for dehumidifying or significantly reducing the air that the special-purpose exsiccator of humidity was handled, so that the exact value of measurement voltage breakdown for oil-filled expansion vessel or oil conservater.
Between the electric device temperature raising period, insulating oil or cold oil flow in oil-filled expansion vessel, and after temperature descended, insulating oil or cold oil turned back to electric device from oil-filled expansion vessel, and therefore, insulating oil or cold oil shrink.
Usually, oil level indicator also is used to measure in the oil-filled expansion vessel oil level in the filling transformer oil conservater especially.
Under the situation of refueling, oil level indicator is used for checking whether transformer is full of; Surpass under the situation of most significant digit at oil, oil level indicator is used for also preventing that oil from leaking.
Under the situation that oil reduces, oil level indicator can also show and arrived lowest order, thereby prevent that winding from not having oil.
With reference to accompanying drawing, traditional oil level indicator has been shown among Fig. 1, floating body 1 is connected with floating bar 2 operability usually; In service, the movement of the floating body 1 in the filling transformer oil conservater 3 that is caused by the variation of oil level is changed into the rotation of floating bar 2.
For safety, floating bar 2 and then be connected with for example panel board of transformer 4 electric devices by magnetic engagement point; Further, this panel board is operated above-mentioned movement so that clear visual oil level indication to be provided to the user in display 5.
Usually, magnetic engagement point realizes that by the magnetic coupling of two groups of magnets every group comprises for example two magnets.
First group of magnet is placed in the inside of oil conservater 3, and is coupled with floating bar 2 operability; And second group of magnet places the outside of oil conservater 3 with panel board, and is coupled with the panel board operability.
So, for each variation of liquid level (pasta), magnetic engagement point correspondingly rotates, and respective change appears in the indication on the index dial of panel board.
Also utilize the disk seal of serigraphy to close display 5, the dish of this serigraphy has at the reference marker corresponding with the pasta that should reach in the temperature of determining with oil of the indicator on the scale or above the scale.
In transformer oil conservater 3, there are some to represent the switch of minimum and maximum oil position usually.
The another kind of oil level indicator that is used for electric device also is known, and it produces continuous analog electrical signal as the measurement of vessel filling degree.
Above-mentioned oil level indicator has the indication axle, this indication axle is placed in the display part of unit, and be connected with pot, thereby change the occupied state of the oil conservater that measures the angular displacement of potentiometric axle into, thereby the simulating signal of expression liquid level (oil level) is provided.
Yet above-mentioned known oil level is in respect of some shortcomings, and wherein Zui Da shortcoming is always need indicator intuitively visual; In other words, operator at a distance can not check the oil level indicator of the oil conservater of electric device, checks and can only rest on the oil level indicator front.
Substantially, use under the situation of electric device in the large-scale graft that needs the operator carefully and constantly test (huge implant), this is a serious problem.
Especially, this shortcoming also causes the increase of running cost, and is serious obstacle for lean production.
In addition, it also causes the obstruction to the security of graft, because in case of emergency, the people need come the notice situation and situation is conveyed to the workman near danger.
Therefore, important goal of the present invention provides a kind of oil level indicator with electronics output for oil-filled electric device.
Another target of the present invention provides a kind of more reliable and effective oil level indicator of equivalent of oil level indicator of the ratio known type for oil-filled electric device.
Another target of the present invention provide a kind of for oil-filled electric device can with than the known oil level indicator of prior art more the mode of valid metric come the oil level indicator of the safety condition of monitoring power electric device.
In addition, another target of the present invention is the oil level indicator that has structure and the lower cost of manufacture of simplification with respect to prior art that realize to be used for oil-filled power equipment.
The target of these and other realizes by the enforcement according to the oil level indicator that is used for oil-filled electric device of appended claim 1.
Other ins and outs of the oil level indicator (theme of the present invention) that is used for oil-filled electric device are described in each dependent claims.
Advantageously, can accurately measure the oil level in the filling transformer oil conservater according to the oil level indicator of invention, and increase the safe coefficient of generating plant indirectly, keep the high-caliber operational efficiency of relevant apparatus simultaneously.
Oil level indicator of the present invention also is easy to make, and the low cost of manufacture required with respect to prior art.
From following about as an example and the invention that unrestricted purpose provides preferred embodiment with the description of accompanying drawing, it is more obvious that above-mentioned target and advantage can seem, wherein:
-Fig. 1 is the fragmentary, perspective view for the known oil level indicator of the oil level of measuring the filling transformer oil conservater, and
-Fig. 2 is the partial sectional view according to the part of the oil level indicator with electronics output for the filling transformer oil conservater of the present invention;
-Fig. 3 shows the exemplary power transformer that comprises according to oil level indicator of the present invention;
-Fig. 4 is that expression is according to the synoptic diagram of oil level indicator of the present invention.
In the following description, for simplicity, be denoted by like references according in the oil level indicator of the present invention with the identical or similar elements of element shown in the known oil level indicator of Fig. 1.
In addition, hereinafter, will describe with reference to its making in the power transformer oil conservater by concrete according to oil level indicator of the present invention, limit its possible scope and application by any way but be not intended to.
Fig. 3 shows exemplary power transformer 100, comprises cabinet 10 and oil conservater 3, and described cabinet 10 is deposited the active part of transformer, for example magnetic core and coil.
Oil level indicator and oil conservater 3 operative association, and as mentioned above, oil level indicator comprises floating bar 2, floating bar 2 changes the movement of the floating body that is associated 1 in the filling transformer oil conservater 3 into the movement of the indicator of signal index dial or disk 8, for example rotation.
For simplicity, the wall that couples with floating bar 2 operability that only shows oil conservater 3 among Fig. 1 to Fig. 2.
In the illustrative embodiments shown in Fig. 3, signal index dial or disk 8 and then shown device 5 covers, and is placed on the wall with respect to the opposite side of floating bar 2 of oil conservater 3.
Preferably come operability to couple by magnetic coupling according to the element that places oil conservater 3 inside in the oil level indicator of the present invention (for example floating body 1 and floating bar 2) and oil conservater 3 component external (for example signal index dial or disk 8) that place of indicator itself; As previously described, also in the oil level indicator of Fig. 3, such magnetic coupling can for example realize that by two groups of magnets every group of magnet comprises for example two magnets.
First group of magnet is placed in oil conservater 3 inside, and couples with floating bar 2 operability; And second group of magnet places the outside of oil conservater 3 with dish 8, and couples with dish 8 operability.
Advantageously, in oil level indicator of the present invention, place the part of the main body outside of oil conservater 3 to be connected with another magnet 6 in the magnetic engagement point, magnet 6 is placed in electron plate or 7 fronts, unit.
Such electron plate or unit 7 be for example be suitable for according to the solution that those skilled in the art implement easily export digital signal based on microprocessor circuit, therefore no longer describe in detail herein.
Each variation for liquid (oil) position has the rotation of corresponding magnetic engagement point, produces the rotation of magnet 6 thereupon, thereby changes relevant magnetic field.
Be provided with Magnetic Sensor 9 in electron plate 7, it is suitable for detecting the variation in the magnetic field that is produced by magnet 6, thereby detects the position of magnet 6 self.
This means to have the numerical information of the oil level in the oil conservater.
In preferred implementation of the present invention, the Magnetic Sensor that can detect the position of the magnet 6 that is fixed in the magnetic engagement point comprises special microchip, and this microchip is to the magnetic field sensitivity, especially to the rotation sensitivity in existing magnetic field; This electronic sensor 9 is installed in electron plate 7 the insides, preferably in the face of magnet 6 and can detect the position of magnet 6.
Such microchip can be the AS5040 type of for example being sold by Austriamicrosystem; Apparently, also can successfully use other similarly device and sensor.
When changing appearred in the oil level of oil conservater 3 inside, magnet 6 had corresponding rotation, and this has changed the magnetic field of Magnetic Sensor 9 fronts, thereby Magnetic Sensor 9 provides proportional electronics output; Advantageously, this electronics output also can be by long-distance transmissions.
Therefore, Magnetic Sensor 9 becomes the converter of the position of floating bar 2 in the filling transformer oil conservater 3, and thereby becomes the converter of the position of floating body 1.
Therefore, according to the present invention, the oil level digital value can be by long-distance transmissions, thereby makes the operator with reliable and effective and efficient manner, in the place of safety this digital value is checked, and also can control it constantly.
In addition, even position a long way off also always can obtain actual oil level indication; Therefore, the operator of remote location has an opportunity to know in advance that whether oil level is near danger level.Significantly, except the indication of the scene that provided by signal index dial or disk 8, replace or preferably can use described long-range indication.
The feature of above-mentioned oil level indicator (it is target of the present invention) and relevant advantage, from top description clearly.
Such result also reaches by very simple structure, and can be applied to the power equipment of any kind in principle, especially in power transformer.
Therefore, another target of the present invention comprises a kind of power transformer, and it comprises that at least one front is described and as the oil level indicator of defined type in the claims.
At last, significantly, can to the oil level indicator with electronics output of the present invention carry out many changes and do not deviate from inventive concept the principle of intrinsic novelty, obviously, in actual enforcement of the present invention, the material of the details that illustrates, shape and size can arrange arbitrarily as required, and also can be replaced by other equivalence techniques.
For example, on-the-spot disk or index dial can be abandoned or can be replaced by the on-the-spot fluid level gauge of other equivalence, and, place coupling between the inside and outside element of oil conservater to realize by the mode that is different from magnetic, as long as it meets functional requirement and security doctrine.
Claims (9)
1. oil level indicator with electronics output that is used for oil-filled electric device, described oil level indicator comprise be connected with bar (2), be suitable for floating body (1) mobile in the oil-filled container of related electric device or oil conservater (3), it is characterized in that described oil level indicator comprises:
-magnet (6), itself and described bar (2) operability couple, and follow by pasta with the described bar of box lunch (2) to change the displacement of the described floating body (1) cause and when mobile, described magnet (6) is mobile; And
-Magnetic Sensor (9), itself and described magnet (6) operative association, for detection of change or the variation in the magnetic field that is provided by described magnet (6) when move the position of described floating body (1), thereby described Magnetic Sensor (9) is the converter of the position of described floating body (1).
2. oil level indicator as claimed in claim 1 is characterized in that, described oil level indicator comprises that described electron plate and described Magnetic Sensor (9) operability couple be used to the electron plate (7) that numeral output is provided.
3. oil level indicator as claimed in claim 1 or 2 is characterized in that, described Magnetic Sensor (9) comprises the microchip (9) that places described magnet (6) front.
4. as the described oil level indicator of the one or more claims in front, it is characterized in that described microchip is arranged on the described electron plate (7).
5. as the described oil level indicator of the one or more claims in front, it is characterized in that described oil level indicator comprises the on-the-spot oil level indicator (8) that couples with described bar (2) operability.
6. as the described oil level indicator of the one or more claims in front, it is characterized in that described numeral output and the variation in described magnetic field and the ratio that is moved into of described bar (2).
7. as the described oil level indicator of the one or more claims in front, it is characterized in that described electron plate is configured to the described numeral output of long-distance transmissions.
8. as the described oil level indicator of the one or more claims in front, it is characterized in that described oil level indicator comprises the magnetic engagement point, described magnet (6) is connected with described magnetic engagement point operation with described bar (2).
9. a power transformer comprises that at least one is as the described oil level indicator of the one or more claims in front.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2010/070757 WO2012089235A1 (en) | 2010-12-27 | 2010-12-27 | Oil level indicator with electronic output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103270398A true CN103270398A (en) | 2013-08-28 |
Family
ID=44546344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800709361A Pending CN103270398A (en) | 2010-12-27 | 2010-12-27 | Oil level indicator with electronic output |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2659240A1 (en) |
| CN (1) | CN103270398A (en) |
| WO (1) | WO2012089235A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988001046A1 (en) * | 1986-07-28 | 1988-02-11 | Qualitrol Corporation | Hall effect liquid level sensor system |
| JP2004226116A (en) * | 2003-01-20 | 2004-08-12 | Calsonic Kansei Corp | Magnetic liquid level detection device |
| WO2007086719A1 (en) * | 2006-01-25 | 2007-08-02 | Rodriguez Median Juan Oscar | Method, system and devices for measuring the volume of a liquid in a tank |
| CN200950075Y (en) * | 2006-09-19 | 2007-09-19 | 关庆罡 | Transformer oil level gauge capable of transmitting data remotely |
| CN201503299U (en) * | 2009-10-09 | 2010-06-09 | 沈阳海业电力设备有限公司 | Analog signal output type oil level gauge for oil conservator of transformer |
| CN201548292U (en) * | 2009-10-26 | 2010-08-11 | 浙江湖州新京昌电子有限公司 | Non-contact type oil level sensor |
| US20100294037A1 (en) * | 2009-05-21 | 2010-11-25 | Deleo David | Gauge assembly and methods of using same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201017241Y (en) * | 2007-01-08 | 2008-02-06 | 李钦 | Intelligent liquid level monitoring apparatus |
-
2010
- 2010-12-27 CN CN2010800709361A patent/CN103270398A/en active Pending
- 2010-12-27 WO PCT/EP2010/070757 patent/WO2012089235A1/en active Application Filing
- 2010-12-27 EP EP10805429.7A patent/EP2659240A1/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988001046A1 (en) * | 1986-07-28 | 1988-02-11 | Qualitrol Corporation | Hall effect liquid level sensor system |
| JP2004226116A (en) * | 2003-01-20 | 2004-08-12 | Calsonic Kansei Corp | Magnetic liquid level detection device |
| WO2007086719A1 (en) * | 2006-01-25 | 2007-08-02 | Rodriguez Median Juan Oscar | Method, system and devices for measuring the volume of a liquid in a tank |
| CN200950075Y (en) * | 2006-09-19 | 2007-09-19 | 关庆罡 | Transformer oil level gauge capable of transmitting data remotely |
| US20100294037A1 (en) * | 2009-05-21 | 2010-11-25 | Deleo David | Gauge assembly and methods of using same |
| CN201503299U (en) * | 2009-10-09 | 2010-06-09 | 沈阳海业电力设备有限公司 | Analog signal output type oil level gauge for oil conservator of transformer |
| CN201548292U (en) * | 2009-10-26 | 2010-08-11 | 浙江湖州新京昌电子有限公司 | Non-contact type oil level sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2659240A1 (en) | 2013-11-06 |
| WO2012089235A1 (en) | 2012-07-05 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130828 |