CN202351148U - High-precision throw-in type liquid density and level sensor - Google Patents
High-precision throw-in type liquid density and level sensor Download PDFInfo
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- CN202351148U CN202351148U CN2011205322376U CN201120532237U CN202351148U CN 202351148 U CN202351148 U CN 202351148U CN 2011205322376 U CN2011205322376 U CN 2011205322376U CN 201120532237 U CN201120532237 U CN 201120532237U CN 202351148 U CN202351148 U CN 202351148U
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- level transmitter
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Abstract
The utility model discloses a high-precision throw-in type liquid density and level sensor. The sensor comprises a liquid level transmitter, wherein the liquid level transmitter is connected with an anti-explosion junction box through an air guide cable; the air guide cable is protected by a corrugated hose in a sealing mode; liquid facing surfaces of two sensors in the liquid level transmitter are subjected to liquid pressure measurement, and the measurement of liquid density is changed into the measurement of differential pressure; and a temperature sensor in the liquid level transmitter is subjected to liquid temperature measurement, and errors of measurement results caused by temperatures are compensated according to the measured temperatures. The measurement method is simple and reliable and can be used for measuring a liquid level at high accuracy; and a stainless steel packaging structure and the corrugated hose of the liquid level transmitter are suitable for measuring common water and can also be suitable for measuring liquid levels of media with high temperatures, adhesion properties, corrosion properties and the like in special occasions.
Description
Technical field
The utility model relates to a kind of measurement mechanism that is used for liquid parameter, particularly a kind of high precision throw-in type fluid density, liquid level sensor.
Background technology
Called putting-into-type liquid level meter can be used for measuring the liquid level in open containers and rivers and canals, lake, the well, have simple in structure, measure characteristics such as accurate and easy for installation, adaptable across fields such as chemical industry, metallurgy, power station, water conservancy, urban water supply and industrial waste waters.
But the density temperature influence of general fluid to be measured is bigger, causes the single pressure sensor Measurement Uncertainty also bigger.In the occasion that requires liquid level is carried out high-acruracy survey, diesel oil/gasoline small canister case for example, common called putting-into-type liquid level meter is difficult to satisfy its requirement on the market.
Summary of the invention
In order to overcome the defective of above-mentioned prior art; The purpose of the utility model is to provide a kind of high precision throw-in type fluid density, liquid level sensor; Solve the deviation that temperature effect and single pressure sensor cause the level gauging result, can carry out density of liquid, level gauging.
In order to achieve the above object, the technical scheme of the utility model is achieved in that
A kind of high precision throw-in type fluid density, liquid level sensor comprise fluid level transmitter 2, and fluid level transmitter 2 links to each other with anti-explosion terminal box 5 through air guide cable 3, and air guide cable 3 uses corrugated flexible hose 4 seal protections.
Described fluid level transmitter 2 comprises main BL 7 and measurement of comparison sensor 8; Measurement of comparison sensor 8 and main BL 7 are packaged in the fluid level transmitter housing with the mode that distributes up and down perpendicular to liquid level, and the back side of main BL 7 is provided with temperature sensor 9; Construction packages adopts Stainless Steel Shell and laser bonding.
The utility model measuring method is simple and reliable, but the high-acruracy survey liquid level; Fluid level transmitter 2 and corrugated flexible hose 4 use stainless steel encapsulating structures are not only applicable to the measurement of light water, also are applicable to the level gauging of medium special occasions such as high temperature, thickness, corrosion.
Description of drawings
Fig. 1 is the utility model user mode synoptic diagram.
Fig. 2 is the structural representation of the utility model.
Fig. 3 is the inner structure synoptic diagram of fluid level transmitter 2.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
With reference to Fig. 2, a kind of high precision throw-in type fluid density, liquid level sensor comprise fluid level transmitter 2, and fluid level transmitter 2 links to each other with anti-explosion terminal box 5 through air guide cable 3, and air guide cable 3 uses corrugated flexible hose 4 seal protections.
With reference to Fig. 3; Described fluid level transmitter 2 comprises main BL 7 and measurement of comparison sensor 8; Measurement of comparison sensor 8 and main BL 7 are packaged in the fluid level transmitter housing with the mode that distributes up and down perpendicular to liquid level, and the back side of main BL 7 is provided with temperature sensor 9.
The principle of work of the utility model is:
With reference to Fig. 1; The bottom of the utility model is fixed under the liquid level perpendicular to liquid level through first flange 1; Top is fixing through second flange 6; The main BL 7 that is positioned at the bottom makes the sensor back pressure lead directly to atmosphere with superposed measurement of comparison sensor 8 through air guide cable 3, and two sensors are met the pressure survey that liquid level carries out liquid; Temperature sensor 9 carries out temperature survey.
The density measure principle is: Δ P=PA-PB=ρ .g.i; Wherein: PA, two cell pressure output valves of PB-A/B; The difference in height of two sensors of L-A/B; ρ-measured medium density; The acceleration of gravity of the tested locality of g-.The difference in height of two sensors is a definite value, and the differential pressure Δ P that records is directly proportional with density of liquid ρ, has so just become the problem of measuring differential pressure to the problem of measuring fluid density.
The level gauging principle: when liquid level gauge was put in the fluid to be measured a certain degree of depth, it was P=ρ .g.H+Po that sensor is met the pressure that liquid level receives; In the formula: the P-transmitter is met the liquid level pressure; ρ-fluid to be measured density measures with measurement of comparison sensor 8 through main liquid level sensor 7; The g-local gravitational acceleration; Atmospheric pressure on the Po-liquid level; The H-transmitter drops into the degree of depth of liquid.Simultaneously, the negative pressure cavity that the atmospheric pressure Po on the liquid level is caused sensor is met the Po of liquid level with offset sensor, and making sensor record pressure is P=ρ .g.H.Therefore, sensor records pressure and is directly proportional with the height H of liquid, has so just become the problem of the height of measuring liquid the problem of gaging pressure.
Main liquid level sensor 7 causes the measuring error under the varying environment temperature with measurement of comparison sensor 8 owing to " temperature is floated "; In main liquid level sensor 7 back mounting temperature sensors 9 measured temperature values; And, can effectively improve the measuring accuracy of density and liquid level according to the influence that measured temperature value compensation temperature causes measurement result.
Claims (2)
1. a high precision throw-in type fluid density, liquid level sensor is characterized in that comprise fluid level transmitter (2), fluid level transmitter (2) links to each other with anti-explosion terminal box (5) through air guide cable (3), and air guide cable (3) uses corrugated flexible hose (4) seal protection.
2. a kind of high precision throw-in type fluid density according to claim 1, liquid level sensor; It is characterized in that; Described fluid level transmitter (2) comprises main BL (7) and measurement of comparison sensor (8); Measurement of comparison sensor (8) and main BL (7) are packaged in the fluid level transmitter housing with the mode that distributes up and down perpendicular to liquid level, and the back side of main BL (7) is provided with temperature sensor (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205322376U CN202351148U (en) | 2011-12-15 | 2011-12-15 | High-precision throw-in type liquid density and level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205322376U CN202351148U (en) | 2011-12-15 | 2011-12-15 | High-precision throw-in type liquid density and level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202351148U true CN202351148U (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011205322376U Expired - Fee Related CN202351148U (en) | 2011-12-15 | 2011-12-15 | High-precision throw-in type liquid density and level sensor |
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| CN (1) | CN202351148U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840896A (en) * | 2012-09-05 | 2012-12-26 | 中国石油化工集团公司 | Liquid level measuring device |
| CN103575357A (en) * | 2012-08-02 | 2014-02-12 | 罗斯蒙德公司 | Level measurement of process fluid using a remote seal |
| CN103852133A (en) * | 2012-12-05 | 2014-06-11 | 上海朝辉压力仪器有限公司 | Throw-in type liquid level transmitter |
| CN104215294A (en) * | 2014-08-28 | 2014-12-17 | 昆山超强光电设备有限公司 | Integrated type liquid-level transmitter |
| CN105509838A (en) * | 2016-01-18 | 2016-04-20 | 广东伟创科技开发有限公司 | Throw-in type sensor |
| CN104677779B (en) * | 2013-11-28 | 2017-06-30 | 中国石油化工股份有限公司 | A kind of method and measurement system for determining fluid density |
| CN107063923A (en) * | 2017-03-09 | 2017-08-18 | 中国农业大学 | A kind of system, method and application for detecting fluid density |
| CN107870016A (en) * | 2016-09-26 | 2018-04-03 | 比亚迪股份有限公司 | Vehicle condensate tank of dehumidifier, method and vehicle |
-
2011
- 2011-12-15 CN CN2011205322376U patent/CN202351148U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575357A (en) * | 2012-08-02 | 2014-02-12 | 罗斯蒙德公司 | Level measurement of process fluid using a remote seal |
| CN103575357B (en) * | 2012-08-02 | 2017-03-01 | 罗斯蒙特公司 | Liquid level gauging using the process fluid of remote seal part |
| CN102840896A (en) * | 2012-09-05 | 2012-12-26 | 中国石油化工集团公司 | Liquid level measuring device |
| CN103852133A (en) * | 2012-12-05 | 2014-06-11 | 上海朝辉压力仪器有限公司 | Throw-in type liquid level transmitter |
| CN104677779B (en) * | 2013-11-28 | 2017-06-30 | 中国石油化工股份有限公司 | A kind of method and measurement system for determining fluid density |
| CN104215294A (en) * | 2014-08-28 | 2014-12-17 | 昆山超强光电设备有限公司 | Integrated type liquid-level transmitter |
| CN105509838A (en) * | 2016-01-18 | 2016-04-20 | 广东伟创科技开发有限公司 | Throw-in type sensor |
| CN107870016A (en) * | 2016-09-26 | 2018-04-03 | 比亚迪股份有限公司 | Vehicle condensate tank of dehumidifier, method and vehicle |
| CN107063923A (en) * | 2017-03-09 | 2017-08-18 | 中国农业大学 | A kind of system, method and application for detecting fluid density |
| CN107063923B (en) * | 2017-03-09 | 2020-03-31 | 中国农业大学 | System and method for detecting liquid density and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20141215 |
|
| EXPY | Termination of patent right or utility model |