CN202133437U - Self-calibration drop type pressure liquid level meter - Google Patents
Self-calibration drop type pressure liquid level meter Download PDFInfo
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- CN202133437U CN202133437U CN201120228528U CN201120228528U CN202133437U CN 202133437 U CN202133437 U CN 202133437U CN 201120228528 U CN201120228528 U CN 201120228528U CN 201120228528 U CN201120228528 U CN 201120228528U CN 202133437 U CN202133437 U CN 202133437U
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- liquid level
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- level meter
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- type pressure
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- 239000007788 liquid Substances 0.000 title claims abstract description 66
- 239000012530 fluid Substances 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a self-calibration drop type pressure liquid level meter which comprises a casing and cables. A main sensor and an auxiliary sensor are arranged in the casing; the cables are connected on the main sensor and the auxiliary sensor; the main sensor is fixedly arranged below the auxiliary sensor; and the fixed vertical distance between the main sensor and the auxiliary sensor is a. The self-calibration drop type pressure liquid level meter has a self-calibration function, has the advantages of accurate measurement result, low cost, simple structure and convenience in operation, and can be applied to various occasions.
Description
Technical field:
The utility model belongs to the level gauging field, relates to a kind of throw-in type pressure liquid level meter, especially a kind of high-precision throw-in type pressure liquid level meter of self-calibrating.
Background technology:
The principle of throw-in type pressure liquid level meter is directly to put into pressure sensor to be placed on liquid bottom in the liquid, calculates liquid level with the liquid pressure value that records divided by density of liquid and acceleration of gravity.Be liquid level h=P/ (ρ g), wherein, P is the pressure that records, and ρ is a density of liquid, and g is an acceleration of gravity.Throw-in type pressure liquid level meter is because structure is very simple, so cost is very cheap.The unit price of other various liquid level gauges is about 5,000 yuan to 50,000 yuan.The cost of throw-in type pressure liquid level meter has only hundreds of unit.But owing to be difficult to obtain exact value with the density of liquid ρ of the required usefulness of throw-in type pressure liquid level meter; Need (for example annual) artificial demarcation regularly; What, temperature, composition, the variation of rest time of liquid all can cause liquid density variation, thereby it is big to form the level value error of measuring.Though this just makes throw-in type pressure liquid level meter very cheaply but can only be used for the very low occasion of precision prescribed, big limitations usable range.
For example application number is that the Chinese patent of 200520107035.1 (applying date is on August 19th, 2005) discloses a kind of throw-in type pressure liquid level measuring instrument; The sensor of this fluid level measuring instrument is put in the testing liquid; Adopt metal shell to seal fully; The pressure transducer probe detects pressure signal, carries out linear amplification through the operational amplification circuit plate that links to each other with this probe, and the signal after amplifying through signal wire transmits is to the next stage detection system.Operational amplification circuit plate and signal transmssion line are arranged in protection tube and metal shell, isolate with measurement liquid, and the sensor probe pressure ratio communicate with outside atmosphere than end all the time.Overcome and to solve existing fluid level measuring instrument sealing property unreliable, cause measuring unstable, the shortcoming and the problem of energy measurement high temperature wide range liquid level, but obviously this liquid level appearance overcomes density error and do not cause the big defective of measuring error.
The utility model content:
The purpose of the utility model is to overcome the shortcoming of above-mentioned prior art; A kind of self calibration throw-in type pressure liquid level meter is provided; This self calibration throw-in type pressure liquid level meter has self-calibration function, measurement result is accurate, cost is low, simple in structure, easy to use; Can be applicable to various occasions, comprise being applicable to full-bodied environment.
The purpose of the utility model solves through following technical scheme: a kind of self calibration throw-in type pressure liquid level meter, comprise shell and cable, and be provided with master reference and secondary sensor in the said shell, be connected with cable on master reference and the secondary sensor;
Said master reference is fixedly installed on secondary sensor below, and the vertical range fixed distance between master reference and the secondary sensor is a.
Said outer casing bottom is provided with pedestal.
Said case surface and master reference correspondence position are provided with main tracting pressuring hole; Said case surface and secondary sensor correspondence position are provided with secondary tracting pressuring hole.
Said shell top is connected with corrugated flexible hose, and this corrugated flexible hose is communicated with shell.
Said shell is made up of the main casing that is interconnected, sub-shell and connecting pipe, and connecting pipe is arranged between main casing, the sub-shell; At the main casing internal fixation master reference is installed, the main casing sidewall is provided with main tracting pressuring hole; At the sub-shell internal fixation secondary sensor is installed, the sub-shell sidewall is provided with secondary tracting pressuring hole.
Said master reference and secondary sensor all are to be made up of pressure probe.
Said shell is provided with temperature sensor, temperature sensor contact fluid to be measured.
The measuring method of said self calibration throw-in type pressure liquid level meter comprises the steps:
(1) the pressure liquid level meter is dropped in the testing liquid, master reference links to each other through the computing machine of cable with the container outside with secondary sensor;
(2) master reference measures main pressure P
Main, secondary sensor measurement obtains secondary pressure P
SecondaryIf master reference is h to the vertical height of liquid level
Main, secondary sensor is h to the vertical height of liquid level
SecondaryMaster reference is identical with secondary sensing station place solution density, all is ρ;
P
Main-P
Secondary=ρ g (h
Main-h
Secondary) (1);
h
Main-h
Secondary=a (2);
So the density p of master reference position does
ρ=(P
Main-P
Secondary)/ag (3);
The actual pressure of (3) establishing the master reference position is P
Real, then
P
Real=ρ gh
Main=(P
Main-P
Secondary) h
Main/ a (4);
(4) establish master reference and measure main pressure P
MainWith the actual pressure of master reference position be P
RealEquate, then:
h
Main=a/ (1-P
Secondary/ P
Main) (5).
Master reference is to the vertical height h of liquid level
Main, just the measured liquid level h that obtains of self calibration throw-in type pressure liquid level meter does
H=h
Main=a/ (1-P
Secondary/ P
Main) (6).
Wherein, a is the vertical range between master reference and the secondary sensor, the good fixing numeral of having known of Precision Machining when being the manufacturing of self calibration throw-in type pressure liquid level meter, and for example 200 millimeters errors are less than 0.2 millimeter; P
Secondary, P
MainMeasure in real time.In the computing formula (6) of liquid level h, do not comprise and be difficult to the exactly determined fluid density value ρ that changes at any time.
And the liquid level computing formula of traditional throw-in type pressure liquid level meter is
h＝P/(ρg) (7)。
Here; Density p is a multiple factor such as the time length, temperature of kind, the liquid level with liquid, static placement and changing at any time; ρ in the formula (7) should be to the mean value of bottom from the top of liquid; Be to be difficult to exactly determinedly at any time, generally be to use the regular artificial very big value of expired error of demarcating, this level value that has just caused the traditional throw-in type pressure liquid level instrumentation amount of common use to obtain is acknowledged as very inaccurate.
The self calibration throw-in type pressure liquid level meter of the utility model has self-calibration function, measurement result is accurate, cost is low, simple in structure, easy to use, can be applicable to the multiple occasion that comprises high viscosity liquid.
Description of drawings:
Fig. 1 is the self calibration throw-in type pressure liquid level meter structural representation of the utility model;
Wherein: 1 is shell; 2 is corrugated flexible hose; 3 is cable; 4 is master reference; 5 is secondary sensor; 6 is pedestal; 7 is main tracting pressuring hole; 8 is secondary tracting pressuring hole; 9 is main casing; 10 is sub-shell; 11 is connecting pipe; 12 is temperature sensor.
Embodiment:
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:
Referring to Fig. 1, a kind of self calibration throw-in type pressure liquid level meter comprises shell and cable, is provided with master reference and secondary sensor in the said shell, is connected with cable on master reference and the secondary sensor;
Said master reference is fixedly installed on secondary sensor below, and the vertical range fixed distance between master reference and the secondary sensor is a.
Said outer casing bottom is provided with pedestal.
Said case surface and master reference correspondence position are provided with main tracting pressuring hole; Said case surface and secondary sensor correspondence position are provided with secondary tracting pressuring hole.
Said shell top is connected with corrugated flexible hose, and this corrugated flexible hose is communicated with shell.
Said shell is made up of the main casing that is interconnected, sub-shell and connecting pipe, and connecting pipe is arranged between main casing, the sub-shell; At the main casing internal fixation master reference is installed, the main casing sidewall is provided with main tracting pressuring hole; At the sub-shell internal fixation secondary sensor is installed, the sub-shell sidewall is provided with secondary tracting pressuring hole.
Said main casing, sub-shell and connecting pipe are processed by stainless steel or plastic-steel.
Said shell is provided with temperature sensor, temperature sensor contact fluid to be measured.
The measuring method of said self calibration throw-in type pressure liquid level meter comprises the steps:
(1) the pressure liquid level meter is dropped in the testing liquid, master reference links to each other through the computing machine of cable with the container outside with secondary sensor;
(2) master reference measures main pressure P
Main, secondary sensor measurement obtains secondary pressure P
SecondaryIf master reference is h to the vertical height of liquid level
Main, secondary sensor is h to the vertical height of liquid level
SecondaryMaster reference is identical with secondary sensing station place solution density, all is ρ;
P
Main-P
Secondary=ρ g (h
Main-h
Secondary) (1);
h
Main-h
Secondary=a (2);
So the density p of master reference position does
ρ=(P
Main-P
Secondary)/ag (3);
The actual pressure of (3) establishing the master reference position is P
Real, then
P
Real=ρ gh
Main=(P
Main-P
Secondary) h
Main/ a (4);
(4) establish master reference and measure main pressure P
MainWith the actual pressure of master reference position be P
RealEquate, then:
h
Main=a/ (1-P
Secondary/ P
Main) (5).
Master reference is to the vertical height h of liquid level
Main, just the measured liquid level h that obtains of self calibration throw-in type pressure liquid level meter does
H=h
Main=a/ (1-P
Secondary/ P
Main) (6).
Wherein, a is the vertical range between master reference and the secondary sensor, the good fixing numeral of having known of Precision Machining when being the manufacturing of self calibration throw-in type pressure liquid level meter, and for example 200 millimeters errors are less than 0.2 millimeter; P
Secondary, P
MainMeasure in real time.In the computing formula (6) of liquid level h, do not comprise and be difficult to exactly determined fluid density value ρ.
Above content is the further explain that combines concrete preferred implementation that the utility model is done; The embodiment that can not assert the utility model only limits to this; Those of ordinary skill for technical field under the utility model; Under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the utility model and confirm scope of patent protection by claims of being submitted to.
Claims (6)
1. a self calibration throw-in type pressure liquid level meter comprises shell, in the enclosure master reference and secondary sensor is set,
It is characterized in that:
Said master reference is fixedly installed on secondary sensor below, and the vertical range between master reference and the secondary sensor is fixed as a;
Said master reference and secondary sensor all are to be made up of pressure probe.
2. self calibration throw-in type pressure liquid level meter according to claim 1 is characterized in that:
Said outer casing bottom is provided with pedestal.
3. self calibration throw-in type pressure liquid level meter according to claim 1 is characterized in that:
Said case surface and master reference correspondence position are provided with main tracting pressuring hole; Said case surface and secondary sensor correspondence position are provided with secondary tracting pressuring hole.
4. self calibration throw-in type pressure liquid level meter according to claim 1 is characterized in that:
Said shell top is connected with corrugated flexible hose, and this corrugated flexible hose is communicated with shell.
5. self calibration throw-in type pressure liquid level meter according to claim 1 is characterized in that:
Said shell is made up of the main casing that is interconnected, sub-shell and connecting pipe, and connecting pipe is arranged between main casing, the sub-shell; At the main casing internal fixation master reference is installed, the main casing sidewall is provided with main tracting pressuring hole; At the sub-shell internal fixation secondary sensor is installed, the sub-shell sidewall is provided with secondary tracting pressuring hole.
6. self calibration throw-in type pressure liquid level meter according to claim 1 is characterized in that:
Said shell is provided with temperature sensor, temperature sensor contact fluid to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120228528U CN202133437U (en) | 2011-06-30 | 2011-06-30 | Self-calibration drop type pressure liquid level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120228528U CN202133437U (en) | 2011-06-30 | 2011-06-30 | Self-calibration drop type pressure liquid level meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202133437U true CN202133437U (en) | 2012-02-01 |
Family
ID=45522203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120228528U Expired - Lifetime CN202133437U (en) | 2011-06-30 | 2011-06-30 | Self-calibration drop type pressure liquid level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202133437U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438960A (en) * | 2013-08-27 | 2013-12-11 | 中绿环保科技股份有限公司 | Differential pressure type high sensitivity liquid level flow measuring device |
| CN103983323A (en) * | 2014-06-06 | 2014-08-13 | 国家电网公司 | Hydropower station water level measurement method and system |
-
2011
- 2011-06-30 CN CN201120228528U patent/CN202133437U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438960A (en) * | 2013-08-27 | 2013-12-11 | 中绿环保科技股份有限公司 | Differential pressure type high sensitivity liquid level flow measuring device |
| CN103983323A (en) * | 2014-06-06 | 2014-08-13 | 国家电网公司 | Hydropower station water level measurement method and system |
| CN103983323B (en) * | 2014-06-06 | 2017-12-22 | 国家电网公司 | Hydropower station water level measuring method and hydropower station water level monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DINGHUA ELECTRONICS CO., LTD. Free format text: FORMER OWNER: WANG RUI Effective date: 20131113 Free format text: FORMER OWNER: WANG PU WANG DINGHUA Effective date: 20131113 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131113 Address after: 710065 Shaanxi city of Xi'an province high tech Zone Guangde road F2B-5 Patentee after: Xi'an Dinghua Electronics Co., Ltd. Address before: 710065 Shaanxi city of Xi'an province high tech Zone Guangde road F2B-5 Patentee before: Wang Rui Patentee before: Wang Pu Patentee before: Wang Dinghua |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 710065 Shaanxi city of Xi'an province high tech Zone Guangde road F2B-5 Patentee after: Xi'an electronic Limited by Share Ltd Address before: 710065 Shaanxi city of Xi'an province high tech Zone Guangde road F2B-5 Patentee before: Xi'an Dinghua Electronics Co., Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Self-calibrating putting-into-type pressure liquid level meter and measuring method thereof Effective date of registration: 20180921 Granted publication date: 20120201 Pledgee: Bank of Changan Limited by Share Ltd Pledgor: Xi'an electronic Limited by Share Ltd Registration number: 2018610000158 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210408 Granted publication date: 20120201 Pledgee: Bank of Changan Limited by Share Ltd. Pledgor: XI'AN DINGHUA ELECTRONICS Co.,Ltd. Registration number: 2018610000158 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120201 |