CN205102882U - Liquid level measuring apparatus - Google Patents
Liquid level measuring apparatus Download PDFInfo
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- CN205102882U CN205102882U CN201520921966.9U CN201520921966U CN205102882U CN 205102882 U CN205102882 U CN 205102882U CN 201520921966 U CN201520921966 U CN 201520921966U CN 205102882 U CN205102882 U CN 205102882U
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- acquisition device
- pressure acquisition
- liquid level
- pressure
- storage tank
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Abstract
The utility model discloses a liquid level measuring apparatus, include: a storage tank for splendid attire liquid, the densimeter, it includes a pressure collecting device and the 2nd pressure collecting device, a pressure collecting device and the 2nd pressure collecting device are installed in the lower part of storage tank lateral wall and are had certain default distance, differential pressure transmitter, it includes the 3rd pressure collecting device and fourth pressure collecting device, and the 3rd pressure collecting device is installed in the lower part of storage tank lateral wall, and fourth pressure collecting device is installed on the upper portion of storage tank lateral wall and is higher than the liquid level, the controller, its and densimeter and differential pressure transmitter communication connection. The utility model discloses the liquid level density of having eliminated in high temperature, high pressure, the variable -density medium changes the measuring error who arouses to can be accurate measure liquid level.
Description
Technical field
The utility model relates to field of measuring technique.More particularly, the utility model relates to a kind of liquid level emasuring device.
Background technology
In the raw material of chemical industry or the preparation process of process product, often need to carry out continuous coverage to the liquid level in uncovered or closed container.Liquid level information is a key parameter, and liquid level is too high, too low all can have influence on the safety of equipment and the personal safety of operating personnel.Differential pressure levelmeter, as one of common liquid level emasuring device, has a wide range of applications in every field.The principle of work of differential pressure levelmeter; require that measured medium density p is constant; but in actual applications; often can run into measured medium density p constantly to change with the impact of multiple factor such as temperature, pressure, component of measured medium; traditional differential pressure levelmeter cannot carry out effective compensation to the change of measured medium density p; just principle mistake is there will be when measuring liquid level; simultaneously in order to adapt to the level gauging of various differing heights; the length of traditional liquid level emasuring device is comparatively large, and installation and maintenance is very inconvenient.
Utility model content
An object of the present utility model solves at least the problems referred to above and/or defect, and provide the advantage will illustrated at least below.
In order to realize, according to these objects of the present utility model and other advantage, providing a kind of liquid level emasuring device, comprising:
For the storage tank of carrying liquid;
Densitometer, it comprises the first pressure acquisition device and the second pressure acquisition device, and described first pressure acquisition device and the second pressure acquisition device are arranged on the bottom of described storage tank sidewall and have certain predetermined distance;
Differential pressure transmitter, it comprises the 3rd pressure acquisition device and the 4th pressure acquisition device, and described 3rd pressure acquisition device is arranged on the bottom of described storage tank sidewall, described 4th pressure acquisition device be arranged on described storage tank sidewall top and higher than liquid level;
Controller, itself and described densitometer and described differential pressure transmitter communicate to connect.
Preferably, the difference in height of described 3rd pressure acquisition device and the 4th pressure acquisition device is less than 9m, and the 4th pressure acquisition device is higher than the 3rd pressure acquisition device.
Preferably, described second pressure acquisition device difference in height higher than the first pressure acquisition device and is between the two 0.8m ~ 1.2m.
Preferably, described second pressure acquisition device difference in height higher than the first pressure acquisition device and is between the two 1m.
Preferably, described second pressure acquisition device is lower than liquid level.
Preferably, the height of described 3rd pressure acquisition device and described storage tank bottom surface is greater than 0.2m.
Preferably, described first pressure acquisition device installation site height equals the installation site height of the 3rd pressure acquisition device.
Preferably, described densitometer adopts differential pressure densimeter.
The utility model at least comprises following beneficial effect:
The first, the utility model provides a kind of liquid level emasuring device simultaneously can measuring the pressure of four points, it effectively can measure the pressure of each several part in storage tank, and by densitometer and differential pressure transmitter, signal is transferred to controller, thus obtain liquid level more accurately.
The second, the top the 4th pressure acquisition device being arranged on storage tank sidewall in the utility model and be because calculating pressure difference value needed for liquid level is pressure difference value between liquid level to the 3rd pressure acquisition point higher than highest measurement liquid level, the impact of liquid fluctuating on measurement accuracy, higher than highest measurement liquid level, can be reduced in 4th pressure acquisition device installation site.
Three, not only accuracy is high, functional reliability is high for liquid level emasuring device described in the utility model, and easy for installation, be convenient to maintenance.
A kind of liquid level emasuring device in the utility model, can eliminate the measuring error that the liquid level variable density in high temperature, high pressure, variable density medium causes, measurement data accurately, postpone little, avoid the coarse problem of level gauging.
Part is embodied by explanation below by other advantage of the present utility model, target and feature, part also will by research and practice of the present utility model by those skilled in the art is understood.
Accompanying drawing explanation
Fig. 1 is the structural representation of liquid level emasuring device described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, can implements according to this with reference to instructions word to make those skilled in the art.
Should be appreciated that used hereinly such as " to have ", other element one or more do not allotted in " comprising " and " comprising " term or the existence of its combination or interpolation.
Fig. 1 shows according to a kind of way of realization of the present utility model, comprising: for the storage tank 1 of carrying liquid; Densitometer 2, it comprises the first pressure acquisition device 21 and the second pressure acquisition device 22, first pressure acquisition device and the second pressure acquisition device and is arranged on the bottom of storage tank sidewall and has certain predetermined distance; Differential pressure transmitter 3, it comprises the 3rd pressure acquisition device 31 and the 4th pressure acquisition device the 32, three pressure acquisition device and is arranged on bottom apart from storage tank sidewall, the 4th pressure acquisition device be arranged on described storage tank sidewall top and higher than liquid level 11; Controller 4, itself and densitometer and differential pressure transmitter communicate to connect.Height H between first pressure acquisition device and the second pressure acquisition device
1and the difference P between measured pressure
1, by densitometer ρ=P
1/ H
1g can obtain now density p; Difference P between 3rd pressure acquisition device and the pressure measured by the 4th pressure acquisition device is sent to differential pressure transmitter, controller is sent to by densitometer with the signal that differential pressure transmitter obtains, controller formula Hx=P/ ρ g calculates and measures liquid level Hx, thus obtains required liquid level.
In another kind of embodiment, the difference in height of described 3rd pressure acquisition device and the 4th pressure acquisition device is less than 9m, and the 4th pressure acquisition device is higher than the 3rd pressure acquisition device.3rd pressure acquisition device, capillary pipe length between the 4th pressure acquisition device and densitometer are long, the error of pressure transmission can be caused to become large, variation of ambient temperature is more obvious on measurement result impact, degradation problems under equipment dependability, therefore the difference in height both selecting is less than 9m.
In another kind of embodiment, the difference in height between described first pressure acquisition device and the second pressure acquisition device is 0.8m ~ 1.2m, preferably 1m, and the second pressure acquisition device is higher than the first pressure acquisition device.Distance between first pressure acquisition device and the second pressure acquisition device is too small, densimeter measurement error can be increased, apart from excessive, the practicality of package unit can be reduced, therefore the difference in height between the first pressure acquisition device and the second pressure acquisition device is set as 1m.
In another kind of embodiment, described second pressure acquisition device is lower than liquid level.Second pressure acquisition device is arranged on the position lower than liquid level, both ensure that the correctness of this pick-up unit theoretically, also greatly reduces the interference of liquid fluctuating to DATA REASONING, and the force value that collects can be made more stable, reliable.
In another kind of embodiment, the height of described 3rd pressure acquisition device and described storage tank bottom surface is greater than 0.2m.In view of the singularity of medium, storage tank low side may have the sediment (on a small quantity) of certain altitude, and in conjunction with the characteristic of pressure acquisition device Flange joint, the 3rd pressure acquisition device and described storage tank minimum altitude are 0.2m.
In another kind of embodiment, described first pressure acquisition device installation site height equals the installation site height of the 3rd pressure acquisition device, can ensure the normal density measurement value of densitometer, and whole device level gauging scope also can be made to maximize.
Although embodiment of the present utility model is open as above, it is not restricted to listed in instructions and embodiment utilization.It can be applied to various applicable field of the present utility model completely.For those skilled in the art, can easily realize other amendment.Therefore do not deviating under the universal that claim and equivalency range limit, the utility model is not limited to specific details and illustrates here and the legend described.
Claims (8)
1. a liquid level emasuring device, is characterized in that, comprising:
For the storage tank of carrying liquid;
Densitometer, it comprises the first pressure acquisition device and the second pressure acquisition device, and described first pressure acquisition device and the second pressure acquisition device are arranged on the bottom of described storage tank sidewall and have certain predetermined distance;
Differential pressure transmitter, it comprises the 3rd pressure acquisition device and the 4th pressure acquisition device, and described 3rd pressure acquisition device is arranged on the bottom of described storage tank sidewall, described 4th pressure acquisition device be arranged on described storage tank sidewall top and higher than liquid level;
Controller, itself and described densitometer and described differential pressure transmitter communicate to connect.
2. liquid level emasuring device as claimed in claim 1, it is characterized in that, the difference in height of described 3rd pressure acquisition device and the 4th pressure acquisition device is less than 9m, and the 4th pressure acquisition device is higher than the 3rd pressure acquisition device.
3. liquid level emasuring device as claimed in claim 1, is characterized in that, described second pressure acquisition device difference in height higher than the first pressure acquisition device and is between the two 0.8m ~ 1.2m.
4. liquid level emasuring device as claimed in claim 1, is characterized in that, described second pressure acquisition device difference in height higher than the first pressure acquisition device and is between the two 1m.
5. liquid level emasuring device as claimed in claim 1, it is characterized in that, described second pressure acquisition device is lower than liquid level.
6. liquid level emasuring device as claimed in claim 1, it is characterized in that, the height of described 3rd pressure acquisition device and described storage tank bottom surface is greater than 0.2m.
7. liquid level emasuring device as claimed in claim 1, it is characterized in that, described first pressure acquisition device installation site height equals the installation site height of the 3rd pressure acquisition device.
8. liquid level emasuring device as claimed in claim 1, is characterized in that, described densitometer adopts differential pressure densimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520921966.9U CN205102882U (en) | 2015-11-18 | 2015-11-18 | Liquid level measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520921966.9U CN205102882U (en) | 2015-11-18 | 2015-11-18 | Liquid level measuring apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN205102882U true CN205102882U (en) | 2016-03-23 |
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|---|---|---|---|
| CN201520921966.9U Active CN205102882U (en) | 2015-11-18 | 2015-11-18 | Liquid level measuring apparatus |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823761A (en) * | 2016-12-07 | 2017-06-13 | 湖南华电常德发电有限公司 | A kind of desulfuration absorbing tower liquid level of slurry failure emergency processing method |
| CN107702749A (en) * | 2017-10-16 | 2018-02-16 | 中国核动力研究设计院 | A kind of liquid waste evaporator multiparameter measuring device and measuring method |
| CN108469287A (en) * | 2018-03-14 | 2018-08-31 | 国网天津市电力公司电力科学研究院 | Double pressure-sensitive correction type oil level gauge for transformer |
| CN108469286A (en) * | 2018-02-01 | 2018-08-31 | 中冶焦耐(大连)工程技术有限公司 | A kind of automatic density correction method in floating roof formula storage tank level gauging |
| CN110873595A (en) * | 2018-08-31 | 2020-03-10 | 上汽通用汽车有限公司 | Fuel measurement system, fuel pump, fuel tank, method and computer storage medium |
| CN111060178A (en) * | 2019-12-31 | 2020-04-24 | 江苏远望仪器科技有限公司 | Method for acquiring liquid level in cabin |
-
2015
- 2015-11-18 CN CN201520921966.9U patent/CN205102882U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823761A (en) * | 2016-12-07 | 2017-06-13 | 湖南华电常德发电有限公司 | A kind of desulfuration absorbing tower liquid level of slurry failure emergency processing method |
| CN107702749A (en) * | 2017-10-16 | 2018-02-16 | 中国核动力研究设计院 | A kind of liquid waste evaporator multiparameter measuring device and measuring method |
| CN108469286A (en) * | 2018-02-01 | 2018-08-31 | 中冶焦耐(大连)工程技术有限公司 | A kind of automatic density correction method in floating roof formula storage tank level gauging |
| CN108469286B (en) * | 2018-02-01 | 2020-01-24 | 中冶焦耐(大连)工程技术有限公司 | Automatic density correction method in floating roof type storage tank liquid level measurement |
| CN108469287A (en) * | 2018-03-14 | 2018-08-31 | 国网天津市电力公司电力科学研究院 | Double pressure-sensitive correction type oil level gauge for transformer |
| CN110873595A (en) * | 2018-08-31 | 2020-03-10 | 上汽通用汽车有限公司 | Fuel measurement system, fuel pump, fuel tank, method and computer storage medium |
| CN111060178A (en) * | 2019-12-31 | 2020-04-24 | 江苏远望仪器科技有限公司 | Method for acquiring liquid level in cabin |
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