CN108680460B - Split type liquid density measuring meter and measuring method thereof - Google Patents
Split type liquid density measuring meter and measuring method thereof Download PDFInfo
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- CN108680460B CN108680460B CN201810737813.7A CN201810737813A CN108680460B CN 108680460 B CN108680460 B CN 108680460B CN 201810737813 A CN201810737813 A CN 201810737813A CN 108680460 B CN108680460 B CN 108680460B
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- 239000007788 liquid Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000523 sample Substances 0.000 claims abstract description 46
- 230000008054 signal transmission Effects 0.000 claims abstract description 26
- 238000001739 density measurement Methods 0.000 claims description 26
- 238000005070 sampling Methods 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to a split type liquid density meter and a measuring method thereof, wherein the liquid density meter comprises two density measuring probes, two signal transmission lines and a host machine, the two density measuring probes are arranged on a main pipeline, the two density measuring probes are further connected with the host machine through the signal transmission lines, an isolating film is arranged at the joint of an isolator and a pressure sensor, and an isolating medium is arranged in the isolator.
Description
Technical Field
The invention relates to a liquid density measuring device, in particular to a split type liquid density measuring meter and a measuring method thereof.
Background
In the technical requirements of industries such as chemical industry, coal preparation and the like, the density of a liquid medium flowing at a high speed in a pipeline and having a certain pressure needs to be measured and displayed in real time, a traditional density measuring device adopts a densimeter filled with capillary silicone oil as a density measuring device for measuring a coal washing mixed solution, the device is greatly influenced by environment, the measuring precision is easily influenced by other conditions, the whole set of the measuring device needs to be replaced when the measuring device is damaged, the maintenance cost is high, meanwhile, the operation is inconvenient in the replacement process, and the inaccuracy of the production process is easily caused.
Disclosure of Invention
The invention aims to provide a split type liquid density meter and a measuring method thereof, which can solve the defects that a measuring result is not prepared and the replacement cost of measuring equipment is high when measuring the density of fluid in a pipeline.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a split type liquid density measurement meter, includes density measurement probe, signal transmission line, host computer, density measurement probe set up on the trunk line, density measurement probe sets up to two, density measurement probe passes through signal transmission line and links to each other with the host computer.
Further, the density measurement probe comprises a pressure sensor, a connecting pipe and an isolator, wherein the pressure sensor is connected to the upper end of the isolator, an isolating membrane is arranged at the joint of the isolator and the pressure sensor, an isolating medium is arranged in the isolator, the connecting pipe is connected with the lower connecting plate, and the isolator is fixedly connected with the upper connecting plate.
Further, the pressure sensor outside be provided with the protection casing, protection casing and upper portion connecting plate be connected, the protection casing is provided with the signal line transmission hole, ultrasonic ranging sensor is installed on protection casing upper portion simultaneously, ultrasonic sensor is provided with the signal transmission line and is connected to the host computer.
Further, the split type density measuring meter is arranged on the main pipeline in two, and the installation distance of the two density measuring probes is 1-5m.
Further, the signal transmission line is connected with a pressure sensor in the density measurement probe, the pressure sensor is provided with a power supply line and a signal transmission line, and an optical coupling isolator is arranged between the power supply line and the signal transmission line.
Furthermore, the connecting pipe is connected to the sampling pipe, and the connecting device of the connecting pipe and the sampling pipe is in a detachable structure.
Further, the measuring method of the split type liquid density meter mainly comprises the following steps:
S1, installing two density measurement probes on a measurement pipeline, and measuring the distance between the two density measurement probes through an ultrasonic ranging sensor installed on the measurement probe;
S2, according to pressure values measured by the pressure sensors in the two density measuring probes on the high pressure side and the low pressure side, the pressure values are processed by a host computer program, and the density values in the pipeline liquid are converted.
According to the measuring method of the split type liquid density measuring meter, the pressure value converted density value is obtained by the following formula:
low side pressure p1=h1ρg high side pressure p2=h2ρg
The pressure difference delta P between two points is a certain value
ΔP=P2-P1 ρ=ΔP/Hg
Further, the measuring method of the split type liquid density meter comprises the steps of data acquisition, data conversion, data sampling, data processing and data operation, wherein after the data acquisition is completed, the acquired data is subjected to A/D conversion, and the data acquired by the sensor is converted into a digital signal which can be identified by the host; the program samples the target data for several times per second, filters the sampled data, averages the sampled data to improve the data stability and the anti-interference capability, outputs the result after the data operation is finished, and can modify and set parameters such as sampling time, filtering parameters, mounting height, damping coefficient and the like in the program for calibrating the instrument in the use process.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. The measuring probe and the main machine body are mutually independent, and compared with the traditional integrated densimeter, the invention is easy to overhaul and maintain;
2. The measuring probe can be installed according to the distance arranged on the pipeline, and a fixed installation position is not required to be arranged;
3. the signal transmission is isolated by adopting the optocoupler isolator, and the data transmission of the measuring probe and the host body is an electric signal of 4-20mA, so that the data transmission is stable and reliable, the signal transmission quality is improved, and related electric elements are effectively protected;
4. the pressure sensor is provided with the isolating film, so that the direct contact between the liquid to be measured and the sensor can be isolated, and the influence of solid particles and temperature in the liquid to be measured on the measuring precision of the sensor can be reduced.
Drawings
Fig. 1 is a structural diagram of the present invention.
FIG. 2 is a schematic diagram of a density measurement probe according to the present invention.
In the figure, a main pipeline 1, a measuring joint 2, a sensing medium 3, an isolator 4, an isolating film 5, a signal transmission line 6, a pressure sensor 7, a protective cover 8, an ultrasonic ranging sensor 9, an upper connecting plate 10, a lower connecting plate 11, a sampling pipe 12, a density measuring probe 20 and a host machine 21 are arranged.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The split type liquid density meter comprises density measurement probes, a signal transmission line and a host machine, wherein the density measurement probes are arranged on a main pipeline 1, two density measurement probes are arranged on the main pipeline 1, and the density measurement probes are connected with the host machine through the signal transmission line 6; the density measurement probe comprises a pressure sensor 7, a measurement joint 2 and an isolator 4, wherein the pressure sensor 7 is connected to the upper end of the isolator 4, an isolating membrane 5 is arranged at the joint of the isolator 4 and the pressure sensor 7, an isolating medium is arranged in the isolator 4, the measurement joint 2 is connected with a lower connecting plate 11, the isolator 4 is fixedly connected with an upper connecting plate 10, and a sensing medium which is water or hydraulic oil in general is arranged in the isolator 4 and can measure the density of liquids in different types and processes; the pressure sensor 7 outside be provided with protection casing 8, protection casing 8 be connected with upper portion connecting plate 10, protection casing 8 and connecting plate 10 generally use bolted connection, conveniently dismantle, be provided with the signal line transmission hole above the protection casing 8.
According to the above embodiment, the ultrasonic ranging sensor 9 is installed on the upper portion of the protective cover 8, the ultrasonic ranging sensor 9 is provided with a signal transmission line and a power supply line, the signal transmission line and the power supply line are provided with an optocoupler isolator, and the optocoupler isolator is mainly provided with an optocoupler isolation circuit, so that the isolated two circuits are not directly connected electrically, and signal interference caused by the electrical connection between the signal transmission circuit and an external high-voltage circuit can be prevented.
According to the above embodiment, the split type density meter is provided with two split type density meters, namely a high pressure side and a low pressure side, on the main pipeline 1, the installation distance of the two density measuring probes is 1-5m, the installation dimensions of pipelines with different dimensions can be conveniently installed according to the pipelines, the installation positions of the density measuring probes do not need to be measured or limited in advance, after the positions of the density measuring probes are installed, the distance between the two density measuring probes can be measured through the ultrasonic ranging sensor 9 arranged on the upper part of the protective cover 8, the measured data is more accurate, and the liquid density obtained through measurement and calculation after conversion is more accurate.
According to the above embodiment, the signal transmission line 6 is connected with the pressure sensor 7 in the density measurement probe, the pressure sensor 7 is provided with a power supply line and the signal transmission line 6, and an optical coupling isolator is also arranged between the power supply line and the signal transmission line 6 to prevent the influence of the high voltage side of power supply on signal transmission.
According to the above embodiment, the measuring joint 2 is connected to the sampling tube 12, the connection device of the measuring joint 2 and the sampling tube 12 is in a detachable structure, the measuring joint 2 can be connected to the upper surface of the sampling tube 12 through a threaded fastener, and the sealing performance of the connection device is ensured, and the connection device is convenient to detach, so that the density measuring probe is convenient to replace after being damaged.
According to the above embodiment, the measuring method of the split type liquid density meter mainly includes the following steps:
S1, installing two density measurement probes on a measurement pipeline, and measuring the distance between the two density measurement probes through an ultrasonic ranging sensor 9 installed on the measurement probe;
S2, according to pressure values measured by the pressure sensors in the two density measuring probes on the high pressure side and the low pressure side, the pressure values are processed by a host computer program, and the density values in the pipeline liquid are converted.
According to the above embodiment, the measuring method of the split type liquid density meter is according to archimedes principle: p=pgh, the static pressure of a liquid column with a certain height is proportional to the density of the liquid, and the density value is obtained by converting the pressure value into the density value according to the following formula:
the low side pressure, p1=h1ρg; high side pressure p2=h2ρg;
the pressure difference delta P between the two points is a certain value;
ΔP=P2-P1 ρ=ΔP/Hg。
According to the above embodiment, the host program is composed of data acquisition, data conversion, data sampling, data processing and data operation, and after the data acquisition is completed, the acquired data is subjected to a/D conversion, and the data acquired by the sensor is converted into a digital signal which can be identified by the host; the program samples the target data for several times per second, filters the sampled data, averages the sampled data to improve the data stability and the anti-interference capability, outputs the result after the data operation is finished, and can modify and set parameters such as sampling time, filtering parameters, mounting height, damping coefficient and the like in the program for calibrating the instrument in the use process.
Although the application has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various modifications and improvements may be made to the constituent components and/or arrangements of the subject combination arrangement within the scope of the claims of the present disclosure. In addition to variations and modifications in the component parts and/or arrangements, other uses will be apparent to those skilled in the art.
Claims (1)
1. The utility model provides a split type liquid density measurement meter, includes density measurement probe, signal transmission line, host computer, its characterized in that: the density measuring probes are arranged on the main pipeline (1), the number of the density measuring probes is two, and the density measuring probes are connected with the host computer through the signal transmission line (6);
The density measurement probe comprises a pressure sensor (7), a measurement joint (2) and an isolator (4), wherein the pressure sensor (7) is connected to the upper end of the isolator (4), an isolation membrane (5) is arranged at the joint of the isolator (4) and the pressure sensor (7), an isolation medium is arranged in the isolator (4), the measurement joint (2) is connected with a lower connecting plate (11), and the isolator (4) is fixedly connected with an upper connecting plate (10);
The pressure sensor (7) is externally provided with a protective cover (8), the protective cover (8) is connected with an upper connecting plate (10), and the protective cover (8) is provided with a signal line transmission hole; meanwhile, an ultrasonic ranging sensor (9) is arranged at the upper part of the protective cover (8), and the ultrasonic ranging sensor (9) is provided with a signal transmission line which is connected to a host;
The measuring method mainly comprises the following steps:
s1, installing two density measurement probes on a measurement pipeline, and measuring the distance between the two density measurement probes through an ultrasonic ranging sensor (9) installed on the measurement probes;
s2, according to pressure values measured by pressure sensors in the two density measuring probes at the high pressure side and the low pressure side, processing by a host computer program, and converting the pressure values into density values in pipeline liquid;
The pressure value converted to a density value is obtained by the following formula:
the low side pressure, p1=h1ρg; high side pressure p2=h2ρg;
the pressure difference delta P between the two points is a certain value;
ΔP=P2-P1 ρ=ΔP/Hg；
The host program is composed of data acquisition, data conversion, data sampling, data processing and data operation, and after the data acquisition is completed, the acquired data is subjected to A/D conversion, and the data acquired by the sensor is converted into a digital signal which can be identified by the host; the program samples the target data for a plurality of times every second, filters and averages the sampled data to improve the data stability and the anti-interference capability, outputs the results after the data operation is finished, and can modify and set parameters such as sampling time, filtering parameters, mounting height, damping coefficient and the like in the program for calibrating the instrument in the use process;
The two density measurement probes are arranged on the main pipeline (1), and the installation distance of the two density measurement probes is 1-5m;
The signal transmission line (6) is connected with the pressure sensor (7) in the density measurement probe, the pressure sensor (7) is provided with a power supply line and a signal transmission line (6), and an optical coupling isolator is arranged between the power supply line and the signal transmission line (6);
The measuring joint (2) is connected to the sampling tube (12), and the connecting device of the measuring joint (2) and the sampling tube (12) is in a detachable structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810737813.7A CN108680460B (en) | 2018-07-06 | 2018-07-06 | Split type liquid density measuring meter and measuring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810737813.7A CN108680460B (en) | 2018-07-06 | 2018-07-06 | Split type liquid density measuring meter and measuring method thereof |
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| Publication Number | Publication Date |
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| CN108680460A CN108680460A (en) | 2018-10-19 |
| CN108680460B true CN108680460B (en) | 2024-05-07 |
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| CN201810737813.7A Active CN108680460B (en) | 2018-07-06 | 2018-07-06 | Split type liquid density measuring meter and measuring method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057435A (en) * | 1991-08-03 | 1992-01-01 | 赵仕俊 | Vertical distribution of liquid and liquid level are measured in the storage tanker method and measuring instrument |
| CN2225023Y (en) * | 1995-05-10 | 1996-04-17 | 段祥照 | Liquid level sensor for testing corrosive media |
| CN1527030A (en) * | 2003-09-19 | 2004-09-08 | 桂林电子工业学院 | Multiple parameter measurement device and method for small caliber and small flow fluid |
| CN202351146U (en) * | 2011-11-18 | 2012-07-25 | 西安思坦仪器股份有限公司 | Differential pressure-type density measuring instrument |
| CN103743520A (en) * | 2013-01-30 | 2014-04-23 | 上海洁晟环保科技有限公司 | Pressure sensing device applied to high voltage environment |
| CN104655526A (en) * | 2014-12-01 | 2015-05-27 | 江门天诚溶剂制品有限公司 | Liquid level and density measuring method of liquid material in chemical engineering storage tank |
| CN105466626A (en) * | 2015-12-11 | 2016-04-06 | 中国电子科技集团公司第四十八研究所 | A thin film pressure transducer and a manufacturing method thereof |
| CN206258165U (en) * | 2016-12-22 | 2017-06-16 | 重庆九天测控仪器制造有限公司 | Diaphragm type throw-in type liquid transmitter |
| CN208596096U (en) * | 2018-07-06 | 2019-03-12 | 曲靖伯通智联商贸有限公司 | A kind of split type gravimetre |
-
2018
- 2018-07-06 CN CN201810737813.7A patent/CN108680460B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057435A (en) * | 1991-08-03 | 1992-01-01 | 赵仕俊 | Vertical distribution of liquid and liquid level are measured in the storage tanker method and measuring instrument |
| CN2225023Y (en) * | 1995-05-10 | 1996-04-17 | 段祥照 | Liquid level sensor for testing corrosive media |
| CN1527030A (en) * | 2003-09-19 | 2004-09-08 | 桂林电子工业学院 | Multiple parameter measurement device and method for small caliber and small flow fluid |
| CN202351146U (en) * | 2011-11-18 | 2012-07-25 | 西安思坦仪器股份有限公司 | Differential pressure-type density measuring instrument |
| CN103743520A (en) * | 2013-01-30 | 2014-04-23 | 上海洁晟环保科技有限公司 | Pressure sensing device applied to high voltage environment |
| CN104655526A (en) * | 2014-12-01 | 2015-05-27 | 江门天诚溶剂制品有限公司 | Liquid level and density measuring method of liquid material in chemical engineering storage tank |
| CN105466626A (en) * | 2015-12-11 | 2016-04-06 | 中国电子科技集团公司第四十八研究所 | A thin film pressure transducer and a manufacturing method thereof |
| CN206258165U (en) * | 2016-12-22 | 2017-06-16 | 重庆九天测控仪器制造有限公司 | Diaphragm type throw-in type liquid transmitter |
| CN208596096U (en) * | 2018-07-06 | 2019-03-12 | 曲靖伯通智联商贸有限公司 | A kind of split type gravimetre |
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