CN205483167U - Liquid level measuring apparatus - Google Patents
Liquid level measuring apparatus Download PDFInfo
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- CN205483167U CN205483167U CN201620255662.8U CN201620255662U CN205483167U CN 205483167 U CN205483167 U CN 205483167U CN 201620255662 U CN201620255662 U CN 201620255662U CN 205483167 U CN205483167 U CN 205483167U
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Abstract
The utility model relates to a liquid level measuring apparatus, include: liquid level detection device, liquid level detection device's cross -section is regular shape, the dynamometry module of being connected with liquid level detection device, dynamometry module institute measuring pulling force for the poor note of power for fi, then have F to float = F0 fi, the calculation module that the signal output part of signal input part and dynamometry module is connected, calculation module and data storage module are connected, a calibration module and the 2nd calibration module that signal output part and calculation module's signal input part is connected are when a calibration module is used for demarcating empty liquid level liquid level detection device's gravity F0, when the 2nd calibration module is used for demarcating liquid level detection device and is in high liquid level liquid level detection device's gravity and the poor fi mark of the power between the buoyancy that receives to mark buoyancy F buoy according to F0 and fi mark, 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 machinery instrument, particularly relates to a kind of level gauging dress
Put.
Background technology
The existing measurement apparatus to the liquid level in container mainly has differential pressure type liquid level meter, and differential pressure type liquid level meter makes
Used time first measures the pressure of container bottom, utilizes the proportion inverse of pressure and fluid to be measured to go out liquid level, is equivalent to by right
The pressure signal of container bottom carries out reprocessing and obtains liquid level signal again, is exactly the most directly a Pressure gauge scene instruction, pressure
The pressure perception part principal mode that differential liquid level gauge is used has following several:
A) diaphragm type: with a hydraulically full film chamber pressure measurement, making pressure measuring chamber and fluid to be measured separately, what pressure measurement was surveyed is film
The pressure in chamber, 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 or lower than film chamber, generation static pressure known from experience by packing fluid, causes survey
Amount deviation, the most this kind of sensor must be made of one with pressure measuring chamber, and its extension is signal cable, at complicated building ring
Under border, the stability of sensor is the highest, the precision that impact is measured；
B) isobaric leather diaphragm type: include breather and flange that sensor with lead-out wire thereon and is connected with sensor
Dish, sensor construction is a rectangle cavity, has interconnective sensor outer housing, bottom plate, auxiliary splint, and sensor both sides are felt
Pressure surface experiences the pressure of test solution site in tested ullage air pressure and liquid medium respectively by bottom plate, auxiliary splint,
When the pressure of measured medium each leads into the pressure-sensitive face of sensor high and low voltage chamber, the pressure-sensitive face of both sides produces unequal position
Moving, its displacement and pressure reduction are directly proportional, and the pressure signal measured by lead-out wire output on sensor, sealing property is carried by which
Go out the highest requirement, be 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, propose a kind of liquid level emasuring device and
Its measuring method, this liquid level emasuring device and measuring method thereof can be substantially reduced the sensitivity to environment, by environment during measurement
Impact little, improve certainty of measurement.
The technical problems to be solved in the utility model is achieved through the following technical solutions.A kind of liquid level emasuring device,
It is characterized in that, including:
The level detection parts of the fluid to be measured in inserting container, the cross section of described level detection parts is rule
Shape, the gravity of described level detection parts is F0, the sectional area of described level detection parts is S, and height is H；
The force-measuring module being connected with level detection parts, the described pulling force measured by force-measuring module is that described liquid level is visited
Survey parts are in gravity F during sky liquid level0And this gravity F0When inserting arbitrary liquid level in fluid to be measured with level detection parts
Suffered buoyancy FFloatingBetween power poor, this power difference is designated as Fi, then have FFloating=F0-Fi；
The computing module that signal input part is connected with the signal output part of force-measuring module, described computing module is deposited with data
Storage module connects；
The first demarcating module that signal output part is connected with the signal input part of computing module and the second demarcating module, described
The gravity F of first demarcating module level detection parts described in when being used for demarcating sky liquid level0, the second demarcating module is used for demarcating
Power difference F between gravity and the suffered buoyancy of the level detection parts described in when level detection parts are in high levelI marks,
And according to F0And FI marksDemarcate buoyancy FBuoy；
The display module for showing numerical value being connected with described computing module.
In this utility model one liquid level emasuring device technical scheme, further preferred technical scheme feature is: described
Level detection parts be isometrical cylindrical level detection rod, the length of described level detection rod is more than the height of tested liquid level
Degree, the lower end of described level detection rod is used for immersing fluid to be measured, and the upper end of level detection rod is connected with the lower end of bracing wire, institute
The upper end of the bracing wire stated is connected with force-measuring module.
In this utility model one liquid level emasuring device technical scheme, further preferred technical scheme feature is:
The lever of band fulcrum, one end of described lever and described bracing wire it is provided with between described bracing wire and force-measuring module
Upper end connect, the other end of described lever is connected with described force-measuring module by dynamometry bracing wire.
In this utility model one liquid level emasuring device technical scheme, further preferred technical scheme feature is:
The upper end of described bracing wire is also connected with the balancing weight for balance liquid level detector bar, under described balancing weight is natural
Hang down.
In this utility model one liquid level emasuring device technical scheme, further preferred technical scheme feature is:
When the weight of described balancing weight is more than the weight of described level detection rod, described force-measuring module pulls down
The other end of tight described lever.
In this utility model one liquid level emasuring device technical scheme, further preferred technical scheme feature is:
When the weight of described balancing weight is less than the weight of described level detection rod, described force-measuring module pulls up
The other end of tight described lever.
In this utility model one liquid level emasuring device technical scheme, further preferred technical scheme feature is:
Also include that the protective jacket for preventing described level detection rod from tilting, described protective jacket are visited with described liquid level
Survey rod is coaxially disposed.
In this utility model one liquid level emasuring device technical scheme, further preferred technical scheme feature is:
Also including the protective jacket for sealing liquid level detector bar, including upper and lower protective jacket, described upper and lower protective jacket leads to
The sidewall of the connecting rod and described container of crossing level is connected.
The invention also discloses the measuring method of a kind of above-mentioned liquid level emasuring device, its feature is, including such as
Under step:
A () arranges the systematic parameter of liquid level emasuring device: the liquid level described in when demarcating empty liquid level by the first demarcating module
The gravity F of exploring block0, then by the gravity F of described level detection parts0, the sectional area S of described exploring block and height
Storage in the numerical value input data memory module that degree is H；
B level detection parts are moved on to the A point of known arbitrary liquid level, the liquid level height value H of record A point by ()A, then lead to
Cross force-measuring module and measure value of thrust FA, by the second demarcating module by the liquid level height value H at A point placeARecord with force-measuring module
Value of thrust FAData memory input；
The deep floating ratio parameter K of (c) scale liquid position measurement apparatus:
According to Archimedes' principle, the object being immersed in liquid is equal to quilt by buoyancy upwards, the size of buoyancy
The gravity of the liquid that this object arranges, buoyancy formula has:
FFloating=ρ .g.S.Hi(1),
Arrangement can obtain level detection parts and insert the formula of asking for of arbitrary liquid level in fluid to be measured:
Hi=FFloating/ (ρ .g.S), (2),
Wherein, ρ is the density of fluid to be measured, and g is the acceleration of gravity on level gauging ground, and S is cutting of level detection parts
Area, HiArbitrary liquid level of fluid to be measured is inserted for level detection parts；
The deep floating ratio parameter making ρ .g.S=I/K, K be system, then (2) formula can be changed into: Hi=K.FFloating, then have K=Hi/FFloating(3),
By formula FFloating=F0-Fi(3) formula of substitution, can obtain K=Hi/(F0-Fi) (4)；
Liquid level height value H by the A point of known liquid levelAWith value of thrust FA(4) formula of substitution, can obtain
KA=HA/(F0-FA), when ρ .g.S is constant, KAFor constant value, by KAValue data memory input, a height of deep floating ratio
Parameter K, demarcates complete；
D () can be obtained the formula of liquid level by formula (3) deformation,
Hi=K.FFloating=K (F0-Fi) (5)
The F that will demarcate with the first demarcating module when the constant K of gained, minimum liquid level in step (c)0Real-time with force-measuring module
The pulling force F detectedi(5) formula of substitution, calculates liquid level by computing module.
Compared with prior art, this utility model has the following technical effect that: this utility model by level detection rod,
Bracing wire, force-measuring module and computing module are organically combined and are constituted a kind of liquid level emasuring device, above-mentioned owing to have employed
Structure, the electronic module of this utility model device such as force-measuring module and computing module are all isolated with fluid to be measured, as liquid
The level detection parts of body buoyancy sensor are insensitive to the character of environment and fluid to be measured, protected from environmental little, it is ensured that survey
Accuracy of measurement, but also have cheap, strong adaptability, the advantage such as easy to maintenance, it is particularly suitable for sewage, acid-alkali salt strong oxidizing property
Level Detection Deng corrosive liquids, high-temp liquid, aqueous chemical raw material storage tank etc..
Accompanying drawing explanation
Fig. 1 is example structure schematic diagram of the present utility model；
Fig. 2 is the structural representation of the embodiment of this utility model band lever；
Fig. 3 is the structural representation of this utility model band balancing weight.
Detailed description of the invention
Referring to the drawings, concrete technical scheme of the present utility model is further described, in order to those skilled in the art
Member is further understood that this utility model, and does not constitute the restriction of its right.
Embodiment 1, with reference to Fig. 1-3, a kind of liquid level emasuring device, including:
The level detection parts of the fluid to be measured in inserting container, described level detection parts can select density
Material more than fluid to be measured density, it is also possible to select density less than the material surveying fluid density, but need in level detection portion
The bottom of part or internal outstanding setting be enough to the weight sunk, and the cross section of described level detection parts is regular shape, described
The gravity of level detection parts is F0, the sectional area of described level detection parts is S, and height is H；
The force-measuring module being connected with level detection parts, the described pulling force measured by force-measuring module is that described liquid level is visited
Survey parts are in gravity F during sky liquid level0And this gravity F0When inserting arbitrary liquid level in fluid to be measured with level detection parts
Suffered buoyancy FFloatingBetween power poor, this power difference is designated as Fi, then have FFloating=F0-Fi；
The computing module that signal input part is connected with the signal output part of force-measuring module, described computing module is deposited with data
Storage module connects；
The first demarcating module that signal output part is connected with the signal input part of computing module and the second demarcating module, described
The first demarcating module and the second demarcating module be respectively used to described in when scale liquid position exploring block is in high level and low liquid level
The gravity F of level detection parts0And the power between suffered buoyancy is poor；
The display module for showing numerical value being connected with described computing module.Display module can use display screen 3.
Above-mentioned empty liquid level refers to position when level detection parts are not inserted into fluid to be measured.
Embodiment 2, as in figure 2 it is shown, in a kind of liquid level emasuring device described in embodiment 1, this container can be such as corrosion
Property liquid, high-temp liquid, aqueous chemical raw material storage tank etc., these level detection parts can be isometrical cylindrical level detection
Rod 2, the length of described level detection rod 2 is more than the height of tested liquid level, and the lower end of described level detection rod 2 is used for immersing
Fluid to be measured 6, the upper end of level detection rod 2 is connected with the lower end of bracing wire 24, and pulley 5 can be walked around in the upper end of described bracing wire 24
Being connected with force-measuring module 31, it is also possible to be directly connected with force-measuring module 31, described force-measuring module 31 is for measuring described liquid
The power between gravity and suffered buoyancy when the gravity of position detector bar 2 and level detection rod 2 are in running order is poor；Described
The signal output part of force-measuring module 31 be connected with the signal input part of computing module 33, the signal end of computing module 33 also with number
Connecting according to memory module 34, described computing module 33 is for calculating the suffered buoyancy of described level detection rod 2.Pass through
Position exploring block is set to isometrical cylinder morpheme detector bar 2, can calculate by coincidence theory well, it is simple to gather materials on the spot, anti-
Water impact ability is strong, and most cases need not restraint device.
Embodiment 3, in the liquid level emasuring device described in the above embodiments: between described bracing wire 24 and force-measuring module 31
Being provided with the lever 4 of band fulcrum, one end of described lever 4 is connected with the upper end of described bracing wire 24, another of described lever 4
End is connected with described force-measuring module 31 by dynamometry bracing wire 51.Lever 4 is set, level detection rod 2, lever 4 can be made and survey
Power module 31 forms moment, then can adjust the measurement scope of force-measuring module 31 by adjusting the position of balance pivot, as will
Point moves to level detection rod 2, can increase the measurement scope of force-measuring module 31, if by fulcrum to force-measuring module 31 side shifting,
Then can reduce the measurement scope of force-measuring module 31, go for the microsystem that the buoyancy change of detection part is the least,
Improve certainty of measurement.
Embodiment 4, in the liquid level emasuring device described in embodiment 1: the upper end of described bracing wire 24 also with for balance liquid
The balancing weight 7 of position detector bar 2 connects, and described balancing weight 7 naturally droops.Arranging balancing weight 7 can be by level detection parts
Gross weight equilibrates to close to zero, only can measure buoyancy and substantially eliminate the impact of system weight.Balancing weight 7 can be
Weights.
Embodiment 5, in the liquid level emasuring device described in embodiment 1: when the weight of described balancing weight 7 is more than described liquid
Position detector bar 2 weight time, described force-measuring module 31 strains downwards the other end of described lever 4.
Embodiment 6, in the liquid level emasuring device described in embodiment 1: when the weight of described balancing weight 7 is less than described liquid
Position detector bar 2 weight time, described force-measuring module 31 upwards strains the other end of described lever 4.
Embodiment 7, in the liquid level emasuring device described in embodiment 1: also include for preventing described level detection rod 2 from inclining
Oblique protective jacket, described protective jacket is coaxially disposed with described position detector bar.By arranging protective jacket, it is possible to prevent liquid level to visit
Surveying the situation that rod 2 topples in liquid level change procedure or under water impact, tilts, drifts about, eliminating these may be to measurement
The factor that result has a negative impact, improves certainty of measurement.
Embodiment 8, in the liquid level emasuring device described in embodiment 1: also include the protection for sealing liquid level detector bar 2
Set, including upper protective jacket 23 and lower protective jacket 21, described upper and lower protective jacket passes through the connecting rod 22 of level and described container
The sidewall of 1 connects.
Embodiment 9, in the liquid level emasuring device described in embodiment 1: described level detection parts are that some head and the tail connect
Beading or some end to end cylinders, as long as each unit of beading is uniform and each unit, error will not
Cumulative, and not over the linkage section length of a unit.Each pearl is away from equal, and the same size wanted by pearl, each pearl
Proportion can be unequal, usually requires that proportion is greater than water (not piling up when can guarantee that floating, proportion might be less that water),
There is protecting pipe.The benefit of bead string type is easy standardization, it is easy to Maintenance and Repair, and length adjusts well, and good packed and transported does not interferes with
Time, automatic perpendicular shape, inclination will not be produced, can be as the canonical form of buoyancy sensor.
Embodiment 10, the invention also discloses the measuring method of above-mentioned liquid level emasuring device, including following step
Rapid:
A () arranges the systematic parameter of liquid level emasuring device: the liquid level described in when demarcating empty liquid level by the first demarcating module
The gravity F of exploring block0, then by the gravity F of described level detection parts0, the sectional area S of described exploring block and height
Storage in the numerical value input data memory module that degree is H；
B level detection parts are moved on to the A point of known arbitrary liquid level, the liquid level height value H of record A point by ()A, then lead to
Cross force-measuring module and measure value of thrust FA, by the second demarcating module by the liquid level height value H at A point placeARecord with force-measuring module
Value of thrust FAData memory input；
The deep floating ratio parameter K of (c) scale liquid position measurement apparatus:
According to Archimedes' principle, the object being immersed in liquid is equal to quilt by buoyancy upwards, the size of buoyancy
The gravity of the liquid that this object arranges, so suffered buoyancy is that it arranges in the slotting fluid to be measured that submerges of level detection rod 2
The gravity of liquid, its formula can be designated as:
FFloating=ρ .g.S.Hi(1),
Arrangement can obtain level detection parts and insert the formula of asking for of arbitrary liquid level in fluid to be measured:
Hi=FFloating/ (ρ .g.S), (2),
Wherein, ρ is the density of fluid to be measured, and the unit of ρ is kg/m3；G is the acceleration of gravity on level gauging ground, unit
For m/m2；S is the sectional area of level detection rod, and unit is m2；HiSubmerge for level detection rod the length of liquid, be also test solution
The liquid level of body, HiUnit be m；
Make ρ .g.S=1/K, then (2) formula can be changed into: Hi=K.FFloating, then have K=Hi/FFloating(3),
By formula FFloating=F0-Fi(3) formula of substitution, can obtain K=Hi/(F0-Fi) (4)；
Liquid level height value H by the A point of known liquid levelAWith value of thrust FA(4) formula of substitution, can obtain
KA=HA/(F0-FA), KAFor constant value, by KAValue data memory input, deep floating more complete than parameter K demarcation；
K is the characterisitic parameter relevant with S with ρ, g, only with the density of fluid to be measured, local acceleration of gravity and liquid level
The sectional area of detector bar is relevant, and it is here referred to as by we: deep floating ratio parameter, its dimension is s2/ Kg, namely the degree of depth is with floating
The meaning of the ratio of power, this value can be determined by above-mentioned calculation procedure；
D () is by by the constant K of gained in step (c)A(2) formula of substitution, can obtain the formula of liquid level: Hi=KA.FFloating=KA
(F0-Fi) (5), by this Formula Input Technology computing module；
The bottom surface of the container described in being inserted by level detection parts again, detects its suffered drawing in real time by force-measuring module
Power Fi, this pulling force data is transferred to computing module by force-measuring module, if the position of level detection rod is not changed in, and submerged depth
HiIt is exactly liquid level, when the displacement error caused when dynamometry parts are measured can accept, can not revise, so can be by
Computing module calculates liquid level by formula (5).
In the above embodiments, force-measuring module can select DAYSENSOR Miniature square S type LOAD CELLS, it is also possible to choosing
With in prior art, other can be used to the electronic device of dynamometry, and length and the diameter of level detection rod can be according to actual needs
Selecting, liquid level emasuring device of the present utility model also includes demarcating button 36, and output module is such as used for sending digital liquid level signal
Wireless module, liquid-level switch amount outfan 32；Supply module 35, protection shell, mounting fixing parts and mark: CCC, LOGO,
Model and Quick Response Code.
Input/go out module: a miniUSB power port can be shared with a supply module, data can be transmitted simultaneously；
Supply module: can input/go out module with one and share a miniUSB power port, data can be transmitted simultaneously.
Protection shell and mounting fixing parts, consider according to combined factors such as board layout, use occasion degree of protection.
Claims (8)
1. a liquid level emasuring device, it is characterised in that including:
The level detection parts of the fluid to be measured in inserting container, the cross section of described level detection parts is rule shape
Shape, the gravity of described level detection parts is F0, the sectional area of described level detection parts is S, and height is H；
The force-measuring module being connected with level detection parts, the described pulling force measured by force-measuring module is described level detection portion
Part is in gravity F during sky liquid level0And this gravity F0When inserting arbitrary liquid level in fluid to be measured with level detection parts suffered
The buoyancy F arrivedFloatingBetween power poor；
The computing module that signal input part is connected with the signal output part of force-measuring module, described computing module stores mould with data
Block connects；
The first demarcating module that signal output part is connected with the signal input part of computing module and the second demarcating module, described
The gravity F of the level detection parts described in when one demarcating module is used for demarcating sky liquid level0, the second demarcating module is used for scale liquid position
Power difference F between gravity and the suffered buoyancy of the level detection parts described in when exploring block is in high levelI marksAnd according to
F0And FI marksDemarcate buoyancy FBuoy；
The display module for showing numerical value being connected with described computing module.
Liquid level emasuring device the most according to claim 1, it is characterised in that: described level detection parts are isometrical circle
Cylindricality level detection rod, the length of described level detection rod is more than the height of tested liquid level, under described level detection rod
End is used for immersing fluid to be measured, and the upper end of level detection rod is connected with the lower end of bracing wire, the upper end of described bracing wire and dynamometry mould
Block connects.
Liquid level emasuring device the most according to claim 2, it is characterised in that: it is provided with between described bracing wire and force-measuring module
With the lever of fulcrum, one end of described lever is connected with the upper end of described bracing wire, and the other end of described lever is by surveying
Power bracing wire is connected with described force-measuring module.
Liquid level emasuring device the most according to claim 3, it is characterised in that: the upper end of described bracing wire also and is used for balancing
The balancing weight of level detection rod connects, and described balancing weight naturally droops.
Liquid level emasuring device the most according to claim 4, it is characterised in that: when the weight of described balancing weight is more than described
Level detection rod weight time, described force-measuring module strains downwards the other end of described lever.
Liquid level emasuring device the most according to claim 4, it is characterised in that: when the weight of described balancing weight is less than described
Level detection rod weight time, described force-measuring module upwards strains the other end of described lever.
7. according to the liquid level emasuring device described in any one of claim 1-6, it is characterised in that: also include for preventing described
The protective jacket that level detection rod tilts, described protective jacket is coaxially disposed with described level detection rod.
Liquid level emasuring device the most according to claim 7, it is characterised in that: also include for sealing the anti-of liquid level detector bar
Sheath, including upper and lower protective jacket, described upper and lower protective jacket is connected with the sidewall of described container by the connecting rod of level.
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|---|---|---|---|
| CN201620255662.8U CN205483167U (en) | 2016-03-30 | 2016-03-30 | Liquid level measuring apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620255662.8U CN205483167U (en) | 2016-03-30 | 2016-03-30 | Liquid level measuring apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352943A (en) * | 2016-10-13 | 2017-01-25 | 吉林师范大学 | Liquid level measuring device |
| CN106441496A (en) * | 2016-10-13 | 2017-02-22 | 吉林师范大学 | Liquid level measuring method |
| CN108225476A (en) * | 2017-12-18 | 2018-06-29 | 青岛海尔智能技术研发有限公司 | A kind of hydraulic measurement device |
-
2016
- 2016-03-30 CN CN201620255662.8U patent/CN205483167U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352943A (en) * | 2016-10-13 | 2017-01-25 | 吉林师范大学 | Liquid level measuring device |
| CN106441496A (en) * | 2016-10-13 | 2017-02-22 | 吉林师范大学 | Liquid level measuring method |
| CN108225476A (en) * | 2017-12-18 | 2018-06-29 | 青岛海尔智能技术研发有限公司 | A kind of hydraulic measurement device |
| CN108225476B (en) * | 2017-12-18 | 2020-06-02 | 青岛海尔智能技术研发有限公司 | Hydraulic measuring device |
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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. |