CN100472208C - Sensor in use for measuring humidity ratio in product oil - Google Patents
Sensor in use for measuring humidity ratio in product oil Download PDFInfo
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- CN100472208C CN100472208C CNB2006100974803A CN200610097480A CN100472208C CN 100472208 C CN100472208 C CN 100472208C CN B2006100974803 A CNB2006100974803 A CN B2006100974803A CN 200610097480 A CN200610097480 A CN 200610097480A CN 100472208 C CN100472208 C CN 100472208C
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Abstract
A transducer used for measuring water ratio of oil finished product is prepared as setting standard oil sample measurement cylinder and measurement cylinder of oil sample to be measured on erection support and applying capacity oil sample measurement cylinder as two said measurement cylinders, forming capacity oil sample measurement cylinder by two cylindrical semicircular electrodes in insulation barrel, arranging insulation semicircular bush and metal semicircular bush both being coordinated to each other on two ends of two said electrodes and setting end cover on each end of insulation barrel.
Description
Technical field
The present invention relates to a kind of survey sensor, relate in particular to a kind of sensor in use for measuring humidity ratio in product oil.
Background technology
At planned economy age and reform and opening-up initial stage, petroleum prospecting, collection, refinement, the storage of product oil, transportation, sale are all managed, are specialized in by relevant government department one continuous line.To the quality of product oil, only depend on oil refining enterprise from the source, to detect control voluntarily by national standard; This at private enterprise and private vehicle proportion seldom, national refuelling station all belongs to same system staterun enterprise, and group refueling is not received cash without exception, only received cooking oil coupon; The quality of product oil, especially water percentage are substantially all more than criterion of acceptability, so people also feel to there is no need storage, the transportation to product oil, one-tenth oil quality and the actual water percentage of selling each link circulation monitored.
Since nearly 5 years of last decade, especially the Tenth Five-Year Plan (2001-2005), along with China's sustained economic development and people income and living standard improve constantly, society and private vehicle recoverable amount grow continuously and fast; Build up highway, the high-grade highway mileage increases sharply, the China's refined oil demand also is multiplied.The production of product oil simultaneously, import and export, store, transportation, selling each link also progressively opens to nongovernmental fund, refuelling station under all types of ownership also spreads all over all parts of the country, the refuelling station, various places nearly all adopts cash or the oiling of swiping the card at present, driven by interests, thereby juggle things on the oiling flowmeter of being everlasting institute's volume read-out given short weight in the refuelling station of some disappearance business ethics, or selling product oil mixed in violation of rules and regulations by a certain percentage gimmick such as tap water and lead the consumer into a trap, all often there is generation the illegal phenomenon of this class various places, consumers in general are very discontented and helpless, and numerous and confused in every way strong appealing various places at different levels government strengthens the supervision and the law enforcement dynamics of Oil Product Market.
According to understanding with superintendent office to ground technology meterings such as Nanjing, Huaian, Xuzhou, Nantong and Chuzhous, Anhui, the internal staff of refuelling station is juggled things on the Fuel-filling metering utensil, law enfrocement official and careful consumer find easily, thereby the illegal phenomenon of this class is general at present, simultaneously institute's oil starvation often also about 5%～10%, not really serious; And whether the product oil water cut is exceeded standard, bring very big difficulty owing to lack portable quick measuring equipment at present to law enforcement: take technology metrological service after the sampling, even the personnel of arrangement at once measure by the determination of distillation moisture method of " petroleum products aquametry " defined of GB260-77 (confirming in 1988) the censorship sample, usually also want more than 2 hours to going out result of laboratory test, law enfrocement official's groundless does not allow refuelling station's business during this period, can not stop it to discharge at the moisture of tank bottom from the oil depot oil-feed or accumulation, often sample survey result comes out, and product oil is sold oily scene and quietly changed.Catch his current finished oil water ratio seriously to exceed national regulation 3 ‰ standard moisture for technical supervising department; he usually can make excuses be just now certain oil tank for a long time cleaning precipitation, sell oil near due to the bottom, perhaps simply seriously higher or the like to your pour out one's woes bad, the water percentage of this batch oil that oily fortune company sends here own with victim's tone.Shortage is sold water content in oil fast measuring instrument to real-time monitoring means of finished oil water ratio in the product oil storage field (jar) and product oil edible oil vending machine, is to perplex skill department to effectively supervision and the two big technical barriers of in time enforcing the law of Oil Product Market.
Determining under the temperature oil and water specific inductive capacity this physical characteristics (under the normal temperature, the specific inductive capacity of water is about 80, and the specific inductive capacity of common product oil has only 1.8～2.5, and both differ greatly by specific inductive capacity) that differs greatly.By two plate condensers that parallel metal sheet is formed that insulating medium separates, when ignoring edge effect, its capacitor C can be expressed as:
Wherein, ε
0Be permittivity of vacuum, ε
rFor relative dielectric constant, A between pole plate are the useful area between pole plate.
Work as ε
0, A one timing, ε
rChanging to cause the variation of electric capacity, just can be converted into electric weight output by metering circuit.Dielectric coefficient is an electrolytical specific character, and it is relevant with medium polarized degree and process in electric field.According to electrostatic principle dielectric coefficient as can be known
ε＝1+4πβ (2)
β is the polarization coefficient of medium in the formula, and the dielectric coefficient of vacuum is 1, and the dielectric coefficient of anhydrous product oil is relevant with its component and temperature, and the dielectric coefficient of general light fraction product oil is than next low of heavy fraction product oil.The dielectric coefficient of product oil and its density have certain relation, but still do not have the explicit mathematical of acquisition expression formula at present.The dielectric coefficient of general crude oil is between 1.86～2.24.And the dielectric coefficient of pure water is 70 ~ 88.Oil differs so big with the dielectric coefficient of water, and the variation that water percentage is small can cause the significant change of dielectric coefficient, utilizes the electric physical property of oil/water specific inductive capacity numerical value difference, can convert the variation of measured signal to electric capacitance change.The present invention just is based on that this basic theories carries out.
The determination of distillation moisture method of " petroleum products aquametry " defined of above-mentioned known GB260-77 (confirming in 1988) is time-consuming, can't measure in existing direct sample; And the single capacitive transducer of the existing different shape in market is the product oil moisture degree measuring instrument of sensor, measure signal to noise ratio (S/N ratio) lower, determine and the deficiency of handling because of product oil kind, label, place of production difference and temperature variation cause that error that specific inductive capacity caused in the certain limit fluctuation is difficult
Summary of the invention
The invention provides a kind of capacitance difference dynamic formula sensor in use for measuring humidity ratio in product oil that can reduce the negative effect of sensor lead electric capacity.
The present invention adopts following technical scheme:
A kind of sensor in use for measuring humidity ratio in product oil, comprise standard oil sample measurement tube, oil sample to be measured is measured tube and mounting bracket, the standard oil sample measures tube and oil sample to be measured measurement tube is located on the mounting bracket, the standard oil sample measures tube and oil sample to be measured measurement tube adopts a condenser type oil sample to measure tube, this condenser type oil sample is measured tube and is comprised insulating cylinder, in insulating cylinder, be provided with 2 tubular semicircle electrodes, end at 2 tubular semicircle electrodes is respectively equipped with insulation semicircle lining and the metal semicircle lining that matches, be respectively equipped with another insulation semicircle lining and another metal semicircle lining that matches at the other end of 2 tubular semicircle electrodes, be respectively equipped with end cap at the two ends of insulating cylinder and fix by screw rod.
Compared with prior art, the present invention has following advantage:
(1) can eliminate the harmful effect of sensor lead electric capacity well;
(2) by real-time examination criteria oil sample capacitance, can know the specific inductive capacity of anhydrous oil sample under Current Temperatures easily, and needn't can only be as the monotubular capacitance type sensor with the (product oil of same label of the nominal dielectric constant under the normal temperature of this oil product, crude oil place of production difference, crude oil generates the stratum and becomes oil age difference, its specific inductive capacity is also slightly different, and the specific inductive capacity temperature influence) as the foundation of calculating.
The portable product oil instrument for quick measuring that the present invention's differential (electric capacity) formula sensor constitutes has real-time, quick, portable clear superiority than the standard way of distillation.
Description of drawings
Fig. 1 is a structure cut-open view of the present invention.
Fig. 2 is that condenser type oil sample of the present invention is measured the barrel structure cut-open view.
Fig. 3 is a structure vertical view of the present invention.
Embodiment
A kind of sensor in use for measuring humidity ratio in product oil, comprise standard oil sample measurement tube 2, oil sample to be measured is measured tube 3 and mounting bracket 1, the standard oil sample measures tube 1 and oil sample to be measured measurement tube 2 is located on the mounting bracket 1, the standard oil sample measures tube 2 and oil sample to be measured measurement tube 3 adopts condenser type oil samples to measure tube, this condenser type oil sample is measured tube and is comprised insulating cylinder 4, in insulating cylinder 4, be provided with 2 tubular semicircle electrodes 5,6, at 2 tubular semicircle electrodes 5, an end of 6 is respectively equipped with insulation semicircle lining 7 and the metal semicircle lining 8 that matches, at 2 tubular semicircle electrodes 5,6 the other end is respectively equipped with another insulation semicircle lining 12 and another metal semicircle lining 11 that matches, and is respectively equipped with end cap 10 at the two ends of insulating cylinder 4,13 and fixing by screw rod 9.
Claims (1)
1, a kind of sensor in use for measuring humidity ratio in product oil, it is characterized in that comprising standard oil sample measurement tube (2), oil sample to be measured is measured tube (3) and mounting bracket (1), the standard oil sample measures tube (2) and oil sample to be measured measurement tube (3) is located on the mounting bracket (1), the standard oil sample measures tube (2) and oil sample to be measured measurement tube (3) adopts a condenser type oil sample to measure tube, this condenser type oil sample is measured tube and is comprised insulating cylinder (4), in insulating cylinder (4), be provided with 2 tubular semicircle electrodes (5,6), at 2 tubular semicircle electrodes (5,6) a end is respectively equipped with insulation semicircle lining (7) and the metal semicircle lining (8) that matches, at 2 tubular semicircle electrodes (5,6) the other end is respectively equipped with another insulation semicircle lining (12) and another metal semicircle lining (11) that matches, and is respectively equipped with end cap (10 at the two ends of insulating cylinder (4), 13) and by screw rod (9) fix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100974803A CN100472208C (en) | 2006-11-10 | 2006-11-10 | Sensor in use for measuring humidity ratio in product oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100974803A CN100472208C (en) | 2006-11-10 | 2006-11-10 | Sensor in use for measuring humidity ratio in product oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1959397A CN1959397A (en) | 2007-05-09 |
| CN100472208C true CN100472208C (en) | 2009-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100974803A Expired - Fee Related CN100472208C (en) | 2006-11-10 | 2006-11-10 | Sensor in use for measuring humidity ratio in product oil |
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| CN (1) | CN100472208C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182770B (en) * | 2007-12-27 | 2011-06-29 | 大庆油田有限责任公司 | Capacitance-type sensor used for horizontal well moisture percentage measurement |
| CN101865873B (en) * | 2010-05-26 | 2013-03-20 | 宁波威瑞泰默赛多相流仪器设备有限公司 | Capacitance-conductivity tester for water content of crude oil |
| CA2831645A1 (en) * | 2011-03-28 | 2012-10-04 | Weihai Haiher Technology Co., Ltd. | Electrode structure and apparatus for use in measuring oil-water constituents |
| CN105651832A (en) * | 2014-11-15 | 2016-06-08 | 新疆科立机械设备有限公司 | A material water content measuring sensor structure based on a capacitance principle |
| CN105651831A (en) * | 2014-11-15 | 2016-06-08 | 新疆科立机械设备有限公司 | A device of measuring the water content of a granular material based on capacitance |
| CN108828029B (en) * | 2018-08-14 | 2020-10-23 | 天津大学 | Moisture content measuring device based on plug-in capacitive sensor |
| CN113030200B (en) * | 2021-03-01 | 2023-11-21 | 深圳市先波科技有限公司 | Oil liquid detection device and detection method thereof |
-
2006
- 2006-11-10 CN CNB2006100974803A patent/CN100472208C/en not_active Expired - Fee Related
Non-Patent Citations (6)
| Title |
|---|
| Capacitance transducers for non-intrusive measurement ofwater in crude oil. E.A. Hammer, J. Tollefsen, K. Olsvik.Flow Meas. Instrm.,Vol.1 No.1. 1989 |
| Capacitance transducers for non-intrusive measurement ofwater in crude oil. E.A. Hammer, J. Tollefsen, K. Olsvik.Flow Meas. Instrm.,Vol.1 No.1. 1989 * |
| Determination of water content and salinity from a producingoil well using CPW probe and eigendecomposition. A.M.O. Mohamed, M.Elgamal, R.A. Said.Sensors and Actuators A,Vol.125 No.2. 2006 |
| Determination of water content and salinity from a producingoil well using CPW probe and eigendecomposition. A.M.O. Mohamed, M.Elgamal, R.A. Said.Sensors and Actuators A,Vol.125 No.2. 2006 * |
| 用圆锥台形电容传感器测量物料含水量的研究. 许福永，赵克玉.兰州大学学报(自然科学版)，第32卷第4期. 1996 |
| 用圆锥台形电容传感器测量物料含水量的研究. 许福永，赵克玉.兰州大学学报(自然科学版)，第32卷第4期. 1996 * |
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| CN1959397A (en) | 2007-05-09 |
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