CN205483166U - Atmospheric pressure sensing level gauge - Google Patents
Atmospheric pressure sensing level gauge Download PDFInfo
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- CN205483166U CN205483166U CN201620255661.3U CN201620255661U CN205483166U CN 205483166 U CN205483166 U CN 205483166U CN 201620255661 U CN201620255661 U CN 201620255661U CN 205483166 U CN205483166 U CN 205483166U
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Abstract
The utility model relates to an atmospheric pressure sensing level gauge, include: the pressure measurement air hose, the upper end of pressure measurement air hose is connected and is drawn the pressure pipe, intraductal gas intensity of pressure and the intraductal gas intensity of pressure and the corresponding relation of this pressure measurement air hose in the degree of depth of submerging by in surveying liquid of pressure measurement air hose are measured to pressure measurement module, pressure measurement module, calculation module, this calculation module calculate the liquid level hight value who is surveyed liquid, a calibration module and the 2nd calibration module, a calibration module are used for demarcating the intraductal gas intensity of pressure of the pressure measurement air hose that submerge the degree of depth and correspond of pressure measurement air hose when known high liquid level point, and the 2nd calibration module is used for demarcating the intraductal gas intensity of pressure of the pressure measurement air hose that submerge the degree of depth and correspond of pressure measurement air hose when known low liquid level point, the display module of being connected with calculation module that is used for showing numerical value. The utility model discloses can greatly reduced to the sensitiveness of environment, receive the influence of environment little during the measurement, improve measurement accuracy.
Description
Technical field
This utility model belongs to liquid measure field, relates to a kind of liquid level emasuring device, particularly relates to one
Plant air pressure sensing liquidometer.
Background technology
The existing measurement apparatus to the liquid level in container mainly has differential pressure type liquid level meter, differential liquid
The pressure of container bottom the most first measured by position meter, utilizes the proportion inverse of pressure and fluid to be measured to go out liquid
Position height, is equivalent to obtain liquid level signal again, very by reprocessing the pressure signal of container bottom
To being exactly directly a Pressure gauge scene instruction, the pressure perception part that differential pressure type liquid level meter is used is main
Form has following several:
A) diaphragm type: with a hydraulically full film chamber pressure measurement, make pressure measuring chamber and fluid to be measured separately, survey
What pressure was surveyed is the pressure in film chamber, and this just requires that the liquid thermal expansion coefficient of film intracavity is the least, and film self can not
Produce tension force or tension force understands, and pressure measuring chamber must be with film chamber at sustained height, if pressure measuring chamber is higher than
Or less than film chamber, packing fluid is known from experience and is produced static pressure, causes measured deviation, the most this kind of sensor must and
Pressure measuring chamber is made of one, and its extension is signal cable, under complicated working environment, sensor
Stability is the highest, the precision that impact is measured；
B) isobaric leather diaphragm type: include sensor and lead-out wire thereon and the breather being connected with sensor
And ring flange, sensor construction is a rectangle cavity, have interconnective sensor outer housing, bottom plate,
Auxiliary splint, tested ullage air pressure is experienced respectively by bottom plate, auxiliary splint in pressure-sensitive face, sensor both sides
With the pressure of test solution site in liquid medium, when the pressure of measured medium each lead into sensor height
During the pressure-sensitive face of pressure chamber, the pressure-sensitive face of both sides produces unequal displacement, and its displacement and pressure reduction are directly proportional,
The pressure signal measured by lead-out wire output on sensor, sealing property is proposed the highest by which
Requirement, is acted upon by temperature changes the biggest.
Summary of the invention
The technical problems to be solved in the utility model is for the deficiencies in the prior art, proposes a kind of air pressure transmission
Sense liquidometer and measuring method thereof, this air pressure sensing liquidometer and measuring method thereof can be substantially reduced ring
The sensitivity in border, protected from environmental little during measurement, improve certainty of measurement.
The technical problems to be solved in the utility model is achieved through the following technical solutions.This utility model
Being a kind of air pressure sensing liquidometer, its feature is, including:
For inserting the pressure measurement air hose in the fluid to be measured in container vertically, described pressure measurement air hose
Upper end connect pressure guiding pipe；
The manometric module being connected with the upper end of described pressure guiding pipe, when test solution is inserted in pressure measurement air hose lower end
Time internal, gas pressure intensity and the interior gas of pipe in the pipe of the described pressure measurement air hose described in manometric module measurement
Pressure and the corresponding relation of this pressure measurement air hose submerged depth in fluid to be measured；
The computing module that signal input part is connected with the signal output part of described manometric module, this calculating mould
The interior gas pressure intensity data of pipe and the characterisitic parameter of pressure measurement air hose that tuber collects according to manometric module calculate
The liquid level numerical value of fluid to be measured；
The first demarcating module and second that signal output part is connected with the signal input part of described computing module
Demarcating module, the first described demarcating module is for demarcating when pressure measurement air hose is in known high level point
Gas pressure intensity in submerged depth and corresponding pressure measurement air hose, the second described demarcating module is used for marking
Submerged depth when location survey pressure air hose is in known low liquid level point and the gas in corresponding pressure measurement air hose
Body pressure；
The display module for showing numerical value being connected with described computing module.
In this utility model one air pressure sensing liquidometer technical scheme, further preferred technical scheme is special
Levy and be:
Being arranged with sleeve pipe outside described pressure measurement air hose, the lower end of described sleeve pipe is near described pressure measurement air
The lower end of pipe, the liquid level of fluid to be measured is stretched out in the upper end of described sleeve pipe.
In this utility model one air pressure sensing liquidometer technical scheme, further preferred technical scheme is special
Levy and be: the bottom of described pressure measurement air hose is provided with air bag, the QI KOU of described air bag and described pressure measurement
The lower port of air hose connects.
In this utility model one air pressure sensing liquidometer technical scheme, further preferred technical scheme is special
Levy and be:
The bottom sides of described container is circumscribed with and the closing container of container composition linker, and described air bag sets
In described closing container.
The invention also discloses the measuring method of a kind of above-mentioned air pressure sensing liquidometer, its feature exists
In, comprise the following steps that
A () arranges the systematic parameter of air pressure sensing liquidometer: by sectional area S and the pressure measurement of pressure measurement air hose
Air hose volume V0Numerical value input data memory module in storage；
(b) demarcating steps: known for the lower end of described pressure measurement air hose successively alignment submerged depth is divided
Wei H1And H2High level point and low liquid level point, then by manometric module measure pressure measurement air hose be in
Gas pressure intensity P in pipe corresponding during this two positions1And P2, then by the first demarcating module and second
Demarcating module is by H1、P1And H2、P2Numerical value input data memory module in storage；
C () is set up liquid level by computing module and is asked for equation: according to the state equation of ideal gas:And the parameter characteristic of pressure measurement air hose, obtain the atmospheric pressure in pressure measurement air hose and liquid
The equation of bit depth:
P0.V0=Pi.Vi=(P0+pi).Vi (1)
Wherein, P0For standard atmospheric pressure, with mmH2O counts；
V0For pressure measurement air hose original volume, with mmH2O counts,
PiFor the air pressure absolute pressure variable in pressure measurement air hose during pressure measurement state, with mmH2O counts,
piFor the air pressure in pressure measurement air hose during pressure measurement state relative to pressure variable, with mmH2O counts,
ViFor gas volume variable in pressure-measuring pipe during pressure measurement state, with mm3Meter；
According to the characteristic of pressure measurement air hose, there is Vi=V0-Δ H.S=V0-(Hi-pi) .S (2),
Wherein, Δ H is to enter the depth of water variable in pressure-measuring pipe, with mmH2O counts,
S is the sectional area of pressure measurement air hose, with mm2Meter,
HiFor the submerged depth variable of pressure measurement air hose, in terms of mm；
Bring (2) formula into (1) formula, obtain P0.V0=Pi.Vi=(P0+pi).[V0-(Hi-pi) .S)],
Abbreviation must be about the submerged depth variable H of pressure measurement air hoseiEquation:
Computing module is by gas pressure intensity in the high level point in step (b) and the pipe corresponding to low liquid level point
P1And P2Numerical value and submerged depth H1And H2Numerical value bring formula (3) into, try to achieve V0And P0Value
VcAnd Pc；
By V0And p0Substitution (3) formula, can obtain:
(d) level gauging step: the bottom surface of the container described in the bottom of described pressure measurement air hose is contacted,
By gas pressure intensity p in the pipe in manometric module measurement pressure measurement air hoseiNumerical value, then incited somebody to action by computing module
piNumerical value input formula (4) calculates HiValue, this HiValue is exactly the liquid level of fluid to be measured in container.
Compared with prior art, this utility model has the following technical effect that: this utility model is by surveying
Pressure air hose, pressure guiding pipe, manometric module, computing module, the first demarcating module, the second demarcating module and
Display module is organically combined and is constituted a kind of air pressure sensing liquidometer, above-mentioned owing to have employed
Structure, the electronic module of this utility model device such as manometric module and computing module are all separated by with fluid to be measured
From, the level detection parts as liquid buoyancy sensor are insensitive to the character of environment and fluid to be measured,
Protected from environmental little, it is ensured that certainty of measurement, but also have cheap, strong adaptability, maintenance side
The advantage such as just, is particularly suitable for corrosive liquids, high-temp liquid, the liquid such as sewage, acid-alkali salt strong oxidizing property
The Level Detection of chemical raw material storage tank etc..
Accompanying drawing explanation
Fig. 1 is example structure schematic diagram of the present utility model；
Fig. 2 is embodiment 2 structural representation of the present utility model；
Fig. 3 is embodiment 4 structural representation of the present utility model.
Detailed description of the invention
Referring to the drawings, concrete technical scheme of the present utility model is further described, in order to this area
Technical staff be further understood that this utility model, and do not constitute the restriction of its right.
Embodiment 1, with reference to Fig. 1-3, a kind of air pressure sensing liquidometer, including:
The pressure measurement air hose 3 in fluid to be measured 2 in inserting container 1 vertically, the shape of pressure-measuring pipe
Shape is the most regular, and the partial cross section that liquid enters is long-pending can not be changed, and otherwise can produce measured deviation, described
Pressure measurement air hose upper end connect pressure guiding pipe 31；
The manometric module 57 being connected with the upper end of described pressure guiding pipe 31, when pressure measurement air hose lower end is inserted
Time in fluid to be measured 2, described manometric module 57 measures gas pressure intensity in the pipe of described pressure measurement air hose
And gas pressure intensity and the corresponding relation of this pressure measurement air hose submerged depth in fluid to be measured, pressure measurement in pipe
The gas pressure transmitter module that module 57 uses model to be XGZP6847；
The computing module 54 that signal input part is connected with the signal output part of described manometric module, this calculating
The interior gas pressure intensity data of pipe and the characteristic of pressure measurement air hose that module 54 collects according to manometric module 57 are joined
Number calculates the liquid level numerical value of fluid to be measured, and computing module 54 uses model to be CC2530 chip；
The first demarcating module 51 that signal output part is connected with the signal input part of described computing module 54
With the second demarcating module 52, the first described demarcating module 54 is used for demarcating pressure measurement air hose and is in known
Submerged depth during high level point and the gas pressure intensity in corresponding pressure measurement air hose, the second described mark
Cover half block 52 is for demarcating submerged depth when pressure measurement air hose is in known low liquid level point and corresponding
Gas pressure intensity in pressure measurement air hose, computing module 54 can be connected with wireless transport module 56, calculates
The result that module 54 calculates is by being wirelessly transmitted to client terminal；
The display module 5 for showing numerical value being connected with described computing module 54.Display module is permissible
With display screen 5.
This container 1 can be such as corrosive liquids, high-temp liquid, aqueous chemical raw material storage tank etc..
Embodiment 2, as in figure 2 it is shown, in a kind of air pressure sensing liquidometer described in embodiment 1, described
Pressure measurement air hose 3 outside be arranged with sleeve pipe 32, the lower end of described sleeve pipe 32 is near described pressure measurement
The lower end of air hose, the liquid level of fluid to be measured 2 is stretched out in the upper end of described sleeve pipe.By arranging protective jacket,
It is possible to prevent pressure measurement air hose 3 to topple in liquid level change procedure or under water impact, tilt, float
Situation about moving, eliminates these factors may having a negative impact measurement result, improves certainty of measurement.
Embodiment 3, as in figure 2 it is shown, in a kind of air pressure sensing liquidometer described in embodiment 1, described
The bottom of pressure measurement air hose be provided with air bag 6, the QI KOU of described air bag and described pressure measurement air hose 3
Lower port connect.
Embodiment 4, as it is shown on figure 3, in a kind of air pressure sensing liquidometer described in embodiment 1, described
The bottom sides of container 1 be circumscribed with and the closing container 7 of container composition linker, described air bag 6
It is located in described closing container 7.
The invention also discloses the measuring method of the air pressure sensing liquidometer of above-described embodiment, including as
Under step:
A () arranges the systematic parameter of air pressure sensing liquidometer: by sectional area S and the pressure measurement of pressure measurement air hose
Air hose volume V0Numerical value input data memory module in storage；
(b) demarcating steps: first select submerged depth and be respectively H1And H2High level point and low liquid level point,
Measure H1And H2Numerical value, then the lower end of described pressure measurement air hose is successively directed at this high level point and
Low liquid level point, then measures pipe corresponding when pressure measurement air hose is in this two positions by manometric module
Interior gas pressure intensity P1And P2, then pass through the first demarcating module and the second demarcating module by H1、P1And H2、P2
Numerical value input data memory module in storage；
C () is set up liquid level by computing module and is asked for equation: according to the state equation of ideal gas:And the parameter characteristic of pressure measurement air hose, obtain the atmospheric pressure in pressure measurement air hose and liquid
The equation of bit depth:
P0.V0=Pi.Vi=(P0+pi).Vi (1)
Wherein, P0For standard atmospheric pressure, with mmH2O counts；
V0For pressure measurement air hose original volume, with mmH2O counts,
PiFor the air pressure absolute pressure variable in pressure measurement air hose during pressure measurement state, with mmH2O counts,
piFor the air pressure in pressure measurement air hose during pressure measurement state relative to pressure variable, with mmH2O counts,
ViGas volume variable in pressure-measuring pipe during pressure measurement state, with mm3Meter；
According to the characteristic of pressure measurement air hose, there is Vi=V0-Δ H.S=V0-(Hi-pi) .S (2),
Wherein, Δ H is to enter the depth of water variable in pressure-measuring pipe, with mmH2O counts,
S is the sectional area of pressure measurement air hose, with mm2Meter,
HiFor the submerged depth variable of pressure measurement air hose, in terms of mm；
Bring (2) formula into (1) formula, obtain P0.V0=Pi.Vi=(P0+pi).[V0-(Hi-pi) .S)],
Abbreviation must be about the submerged depth variable H of pressure measurement air hoseiEquation:
Computing module is by gas pressure intensity in the high level point in step (b) and the pipe corresponding to low liquid level point
P1And P2Numerical value and submerged depth H1And H2Numerical value bring formula (3) into, try to achieve V0And P0Value
VcAnd Pc；
By V0And p0Substitution (3) formula, can obtain:
(d) level gauging step: the bottom surface of the container described in the bottom of described pressure measurement air hose is contacted,
By gas pressure intensity p numerical value in the pipe in manometric module measurement pressure measurement air hose, then will by computing module
piNumerical value input formula (4) calculates HiValue, this HiValue is exactly the liquid level of fluid to be measured in container.
Demarcating steps can select any liquid level demarcate, but proving operation for convenience, it is stipulated that
Scale liquid position H1=1000mmH2O, H2=500mmH2O, (can certainly be by other value.Demarcation standard
The depth of water chooses bigger value can expand wide-measuring range, but can run into many tired on proving operation
Difficulty, usually minimum load cell is 10kPa, selects h=1000mm can meet universal bar well
Part).
In the above embodiments, length and the diameter of level detection rod can select according to actual needs, this reality
Also include that demarcating module such as demarcates button with novel air pressure sensing liquidometer；Output module: include for
Send the wireless transport module 56 of digital liquid level signal, liquid-level switch amount outfan 55；Supply module 53,
Protection shell, mounting fixing parts and mark: CCC, LOGO, model and Quick Response Code.
What liquidometer was measured is numerical value, the simply on-off model that liquid-level switch provides, nearly all
In the case of, liquidometer can replace liquid-level switch to work.But with liquidometer replace liquid-level switch be without
Ji, it needs numerical value is converted to switching value.If by the intelligent direct liquid feeding of air pressure sensing liquidometer
Bit switch amount outfan 55, then can increase the application of many occasions.Usually, liquid-level switch have HH,
H, M, L, LL five, uses other liquid-level switch usually can only have 2 positions H, L, the need to
More multidigit is accomplished by installing more liquid-level switch.The liquid-level switch of multidigit output also has, but typically can be relatively
Expensive.If intelligent air pressure sensing liquidometer directly to be added the output of liquid-level switch amount, in general compare
Simply, how many costs are not increased.
Claims (4)
1. an air pressure sensing liquidometer, it is characterised in that including:
For inserting the pressure measurement air hose in the fluid to be measured in container vertically, the upper end of described pressure measurement air hose connects pressure guiding pipe；
The manometric module being connected with the upper end of described pressure guiding pipe, when pressure measurement air hose lower end is inserted in fluid to be measured, gas pressure intensity and the corresponding relation of this pressure measurement air hose submerged depth in fluid to be measured in the interior gas pressure intensity of pipe of the described pressure measurement air hose described in manometric module measurement and pipe；
The computing module that signal input part is connected with the signal output part of described manometric module, this computing module calculates the liquid level numerical value of fluid to be measured according to the characterisitic parameter managing interior gas pressure intensity data and pressure measurement air hose that manometric module collects；
The first demarcating module that signal output part is connected with the signal input part of described computing module and the second demarcating module, the first described demarcating module is gas pressure intensity in the pipe demarcating submerged depth when pressure measurement air hose is in known high level point and corresponding pressure measurement air hose, and the second described demarcating module is gas pressure intensity in the pipe demarcating submerged depth when pressure measurement air hose is in known low liquid level point and corresponding pressure measurement air hose；
The display module for showing numerical value being connected with described computing module.
Air pressure sensing liquidometer the most according to claim 1, it is characterised in that: being arranged with sleeve pipe outside described pressure measurement air hose, the lower end of described sleeve pipe is near the lower end of described pressure measurement air hose, and the liquid level of fluid to be measured is stretched out in the upper end of described sleeve pipe.
Air pressure sensing liquidometer the most according to claim 1 and 2, it is characterised in that: the bottom of described pressure measurement air hose is provided with air bag, and the QI KOU of described air bag is connected with the lower port of described pressure measurement air hose.
Air pressure sensing liquidometer the most according to claim 3, it is characterised in that: the bottom sides of described container is circumscribed with and the closing container of container composition linker, and described air bag is located in described closing container.
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| CN201620255661.3U CN205483166U (en) | 2016-03-30 | 2016-03-30 | Atmospheric pressure sensing level gauge |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758495A (en) * | 2016-03-30 | 2016-07-13 | 连云港大发环保科技有限公司 | Air pressure sensing level gauge and measuring method thereof |
| CN106352945A (en) * | 2016-11-22 | 2017-01-25 | 山东钢铁股份有限公司 | Liquid level measurement device |
| CN109990867A (en) * | 2019-04-11 | 2019-07-09 | 安徽中科龙安科技股份有限公司 | A kind of road ponding on-line intelligence detection method and system |
| CN110375823A (en) * | 2019-08-15 | 2019-10-25 | 泰华智慧产业集团股份有限公司 | Contactless static pressure liquid level meter and level measuring method |
| CN111896068A (en) * | 2020-07-08 | 2020-11-06 | 惠州拓邦电气技术有限公司 | Method and device for detecting water consumption of equipment and cleaning equipment |
| CN116626566A (en) * | 2023-07-25 | 2023-08-22 | 北京中科富海低温科技有限公司 | Low-temperature experiment system, liquid level measurement method and rewarming method of low-temperature experiment system |
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2016
- 2016-03-30 CN CN201620255661.3U patent/CN205483166U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758495A (en) * | 2016-03-30 | 2016-07-13 | 连云港大发环保科技有限公司 | Air pressure sensing level gauge and measuring method thereof |
| CN106352945A (en) * | 2016-11-22 | 2017-01-25 | 山东钢铁股份有限公司 | Liquid level measurement device |
| CN109990867A (en) * | 2019-04-11 | 2019-07-09 | 安徽中科龙安科技股份有限公司 | A kind of road ponding on-line intelligence detection method and system |
| CN109990867B (en) * | 2019-04-11 | 2020-07-10 | 安徽中科龙安科技股份有限公司 | Road accumulated water online intelligent detection method and system |
| CN110375823A (en) * | 2019-08-15 | 2019-10-25 | 泰华智慧产业集团股份有限公司 | Contactless static pressure liquid level meter and level measuring method |
| CN111896068A (en) * | 2020-07-08 | 2020-11-06 | 惠州拓邦电气技术有限公司 | Method and device for detecting water consumption of equipment and cleaning equipment |
| CN111896068B (en) * | 2020-07-08 | 2022-09-30 | 惠州拓邦电气技术有限公司 | Method and device for detecting water consumption of equipment and cleaning equipment |
| CN116626566A (en) * | 2023-07-25 | 2023-08-22 | 北京中科富海低温科技有限公司 | Low-temperature experiment system, liquid level measurement method and rewarming method of low-temperature experiment system |
| CN116626566B (en) * | 2023-07-25 | 2023-09-22 | 北京中科富海低温科技有限公司 | Low-temperature experiment system, liquid level measurement method and rewarming method of low-temperature experiment system |
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| CP01 | Change in the name or title of a patent holder | ||
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Address after: 222000 Court Dormitory 101-1, Majun District, Xincheng Street, Haizhou District, Lianyungang City, Jiangsu Province Patentee after: Jiangsu Dafa Environmental Protection Technology Co., Ltd. Address before: 222000 Court Dormitory 101-1, Majun District, Xincheng Street, Haizhou District, Lianyungang City, Jiangsu Province Patentee before: LIANYUNGANG DAFA ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. |