CN107305176A - The measurement apparatus of oil plant averag density in a kind of oil tank - Google Patents
The measurement apparatus of oil plant averag density in a kind of oil tank Download PDFInfo
- Publication number
- CN107305176A CN107305176A CN201610244954.6A CN201610244954A CN107305176A CN 107305176 A CN107305176 A CN 107305176A CN 201610244954 A CN201610244954 A CN 201610244954A CN 107305176 A CN107305176 A CN 107305176A
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- CN
- China
- Prior art keywords
- differential pressure
- oil plant
- oil
- density
- range
- 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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/26—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring pressure differences
Abstract
The invention discloses a kind of measurement apparatus of oil plant averag density in oil tank, including differential pressure transmitter and density integrating instrument, the signal output part of the differential pressure transmitter is connected with the signal input part of the density integrating instrument, and the calculator of oil plant averag density in oil tank can be calculated according to the differential pressure value of oil plant in the liquid level and oil tank of oil plant in the oil tank by being provided with the density integrating instrument.When the present invention is used static pressure pipeline and total head pipeline are connected firstly the need of the roof in tested oil plant averag density and bottom, differential pressure transmitter input in the present invention is connected with static pressure pipeline and total head pipeline respectively, because the liquid level of oil plant in tank is easily measured, therefore the averag density of oil plant in tank can be easily and quickly measured using the present invention, is measured without by modes such as manual sampling, chemical examinations.
Description
Technical field
The present invention relates to a kind of density measuring equipment of liquid, a kind of measurement apparatus of oil plant averag density in oil tank is concretely related to.
Background technology
Due to the oil in oil tank because species, pressure are different with ambient parameter can engender separate form the phenomenon of multilayer, the larger oil plant of density is easily deposited on lower floor, the relatively small oil plant of density floats over upper strata, can so cause the averag density measurement of oil plant in oil tank to get up extremely difficult.The averag density of oil plant is mainly artificial multi-point sampling in measurement oil tank in the prior art, and the averag density for then carrying out oil plant by laboratory internalization proved recipe formula is determined, and not only measurement process is cumbersome, and is measured by laboratory assay mode and also to waste the long period.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of measurement apparatus of oil plant averag density in oil tank, the averag density of oil plant in oil tank can be easily and quickly measured using the measurement apparatus of the present invention.
To solve above-mentioned technical problem, the measurement apparatus of oil plant averag density in oil tank of the present invention, including differential pressure transmitter and density integrating instrument, the signal output part of the differential pressure transmitter is connected with the signal input part of the density integrating instrument, and the calculator of oil plant averag density in oil tank can be calculated according to the differential pressure value of oil plant in the liquid level and oil tank of oil plant in the oil tank by being provided with the density integrating instrument.
Using the measurement apparatus of oil plant averag density in the oil tank of said structure, when using static pressure pipeline and total head pipeline are connected firstly the need of the roof in tested oil plant averag density and bottom, differential pressure transmitter input in the present invention is connected with static pressure pipeline and total head pipeline respectively, because the liquid level of oil plant in tank is easily measured, therefore the averag density of oil plant in tank can be easily and quickly measured using the present invention, is measured without by modes such as artificial multidraw, chemical examinations.
As the improvement of the present invention, the measurement apparatus of oil plant averag density also includes in the oil tank：
Range subsection setup device for the range of the differential pressure transmitter being reclassified as the continuous range of multistage；
For judge the differential pressure transmitter output current signal whether the current signal judgment means in the range of 4 ~ 20mA standard current signals, if during 4≤I≤20, the current signal judgment means send the current signal that now differential pressure transmitter is exported to described density integrating instrument；If when I ﹤ 4 or I ﹥ 20, the range of the differential pressure transmitter is switched to next range by the current signal judgment means by a upper range, untill the current signal of output is in the range of 4 ~ 20mA standard current signals.
The present invention is reclassified as the continuous range of multistage to the range of the differential pressure transmitter by computer program, the differential pressure signal of the oil tank received according to differential pressure transmitter carries out range switching by current signal judgment means, it is final to measure the differential pressure signal of oil tank, the corresponding current signal of transmission equivalent to by a relative small-range differential pressure transmitter, the measurement accuracy of oil plant differential pressure value in the larger tank of level fluctuation in, tank higher to tank elevation can be greatly enhanced, so as to more accurately measure the averag density of oil plant in tank.Further, since heretofore described range subsection setup device can carry out subsection setup again to the range of differential pressure transmitter, therefore it can not be limited during measurement differential pressure signal by the range and range ratio of differential pressure transmitter, the scope of application is more extensive.
Brief description of the drawings
The present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the structure composition schematic diagram of the measurement apparatus of oil plant averag density in a kind of oil tank of the invention.
Fig. 2 is the computer program FB(flow block) being related in a kind of oil tank of the invention in the measurement apparatus of oil plant averag density.
Embodiment
Referring first to Fig. 1, the measurement apparatus of oil plant averag density in a kind of oil tank of the present invention, including differential pressure transmitter 1 and density integrating instrument 2, the signal output part of the differential pressure transmitter 1 is connected with the signal input part of the density integrating instrument 2, and the calculator 3 of oil plant averag density in oil tank can be calculated according to the differential pressure value △ P of oil plant in the liquid level h and oil tank of oil plant in the oil tank by being provided with the density integrating instrument 2.The formula of oil plant averag density foundation is in the calculator calculating oil tank：△ P=ρ gh, because the liquid level h of oil plant in oil tank is convenient for measuring, can be considered the differential pressure value signal of oil plant in datum, therefore the oil tank transmitted according to differential pressure transmitter can directly calculate the averag density of oil plant in oil tank.When measuring oil plant averag density in flow container using the present invention, it is necessary first to which the input of differential pressure transmitter 1 in the top and bottom connection static pressure pipeline 5 and total head pipeline 6 of tested flow container 4, the present invention is connected with static pressure pipeline 5 and total head pipeline 6 respectively.
Referring back to Fig. 2, the measurement apparatus of oil plant averag density in oil tank of the present invention, in addition to：
For the range P of the differential pressure transmitter 1 to be reclassified as the continuous range P of multistage1、P2、P3……PXRange subsection setup device；
For judge the output current signal I of differential pressure transmitter 1 whether the current signal judgment means in the range of 4 ~ 20mA standard current signals, if during 4≤I≤20, the current signal judgment means send the current signal I that now differential pressure transmitter 1 is exported to described density integrating instrument 2；If when I ﹤ 4 or I ﹥ 20, the current signal judgment means are the range P of the differential pressure transmitter by upper range P1Switch to next range P2, untill the current signal I of output is in the range of 4 ~ 20mA standard current signals.
Claims (2)
1. the measurement apparatus of oil plant averag density in a kind of oil tank, it is characterised in that：Including differential pressure transmitter（1）With density integrating instrument（2）, the differential pressure transmitter（1）Signal output part and the density integrating instrument（2）Signal input part be connected, the density integrating instrument（2）It is interior provided with can be according to oil plant in the oil tank liquid level（h）And in oil tank oil plant differential pressure value（△P）Calculate the calculator of oil plant averag density in oil tank（3）.
2. the measurement apparatus of oil plant averag density in oil tank as claimed in claim 1, it is characterised in that also include：
For the differential pressure transmitter（1）Range（P）It is reclassified as the continuous range of multistage（P1、P2、P3……PX）Range subsection setup device；
For judging the differential pressure transmitter（1）Output current signal（I）Whether the current signal judgment means in the range of 4 ~ 20mA standard current signals, if during 4≤I≤20, the current signal judgment means are now differential pressure transmitter（1）The current signal of output（I）Send described density integrating instrument to（2）；If when I ﹤ 4 or I ﹥ 20, range of the current signal judgment means the differential pressure transmitter（P）By a upper range（P1）Switch to next range（P2）, until the current signal of output（I）Untill in the range of 4 ~ 20mA standard current signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244954.6A CN107305176A (en) | 2016-04-20 | 2016-04-20 | The measurement apparatus of oil plant averag density in a kind of oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244954.6A CN107305176A (en) | 2016-04-20 | 2016-04-20 | The measurement apparatus of oil plant averag density in a kind of oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107305176A true CN107305176A (en) | 2017-10-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610244954.6A Pending CN107305176A (en) | 2016-04-20 | 2016-04-20 | The measurement apparatus of oil plant averag density in a kind of oil tank |
Country Status (1)
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| CN (1) | CN107305176A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114111955A (en) * | 2021-12-09 | 2022-03-01 | 辽宁毕托巴科技股份有限公司 | Metering device for volume and mass of oil in transportation oil tank |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09229842A (en) * | 1996-02-22 | 1997-09-05 | Mitsubishi Heavy Ind Ltd | On-line type liquid density measuring apparatus |
| CN1188231A (en) * | 1997-01-15 | 1998-07-22 | 机械工业部上海工业自动化仪表研究所 | Wide-range differential pressure type flowmeter |
| JP2008170292A (en) * | 2007-01-12 | 2008-07-24 | Ebara Corp | Measuring device of liquid density |
| CN103185614A (en) * | 2013-02-13 | 2013-07-03 | 乌光 | Differential pressure flow transmitter with multiple ranges and automatic range switching function |
-
2016
- 2016-04-20 CN CN201610244954.6A patent/CN107305176A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09229842A (en) * | 1996-02-22 | 1997-09-05 | Mitsubishi Heavy Ind Ltd | On-line type liquid density measuring apparatus |
| CN1188231A (en) * | 1997-01-15 | 1998-07-22 | 机械工业部上海工业自动化仪表研究所 | Wide-range differential pressure type flowmeter |
| JP2008170292A (en) * | 2007-01-12 | 2008-07-24 | Ebara Corp | Measuring device of liquid density |
| CN103185614A (en) * | 2013-02-13 | 2013-07-03 | 乌光 | Differential pressure flow transmitter with multiple ranges and automatic range switching function |
Non-Patent Citations (1)
| Title |
|---|
| 张建华: "《热工仪表及自动装置》", 31 March 2006, 中国电力出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114111955A (en) * | 2021-12-09 | 2022-03-01 | 辽宁毕托巴科技股份有限公司 | Metering device for volume and mass of oil in transportation oil tank |
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Application publication date: 20171031 |