CN106989800A - One kind floating evaporation from water surface station liquid level device for accurately measuring - Google Patents
One kind floating evaporation from water surface station liquid level device for accurately measuring Download PDFInfo
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- CN106989800A CN106989800A CN201710343552.6A CN201710343552A CN106989800A CN 106989800 A CN106989800 A CN 106989800A CN 201710343552 A CN201710343552 A CN 201710343552A CN 106989800 A CN106989800 A CN 106989800A
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- water surface
- evaporator
- liquid level
- measuring cylinder
- evaporation
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/56—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements
- G01F23/62—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements using magnetically actuated indicating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The present invention provides a kind of floating evaporation from water surface station liquid level device for accurately measuring, including installing instruction case and evaporator above deck, suspension is provided with barrel cover in the instruction case, measuring cylinder is installed in barrel cover, the magnetic ball float of magnetostriction type sensor is enclosed on inductive axis to move up and down with water surface change along inductive axis, the signal processing unit of magnetostriction type sensor is arranged on outside measuring cylinder, communicating pipe, connect interface, " L " shape connector and connecting tube, which are engaged, realizes that measuring cylinder mutually circulates with the aqueous phase in evaporator, the end of " L " shape connector is additionally provided with limitation measuring cylinder and evaporator water convection velocity current limliting diaphragm, this measurement apparatus technology is realized easy, measurement accuracy is high, can be by measurement error control within 0.2mm, floating evaporation station liquid level accurate measuring technique problem is solved well, monitoring effect is good, evaporation information gathering automation is set really to become a reality.
Description
Technical field
It is specifically a kind of floating evaporation from water surface station liquid level the present invention relates to one kind floating evaporation from water surface station liquid level emasuring device
Device for accurately measuring.
Background technology
Evaporation is one of important channel of water circulation, and accurate measurements evaporation capacity, to seeking regional water circulation law, instructs water
MRP is utilized, and service industrial and agricultural production is significant.Because evaporation discharge observation requirement is accurate to 0.1mm, by metering system
Method and sensor accuracy class limitation, water surface evaporation automatic data collection is always industry problem.Float evaporation from water surface station wind-engaging
Unrestrained fluctuating factor influence, evaporator level monitoring is particularly difficult, and the station liquid level observing of floating evaporation at present is based on artificial, automatic prison
Survey and be still in the exploratory stage.The problem of conventional liquid level high-acruracy survey is present, current resolving power reaches that 0.1mm liquid level gauge is main
There are ultrasonic liquid level meter, pressure resistance type liquid level gauge, angular coding float type level gauge, magnetostriction liquidometer etc., but practical function is all
Not ideal enough, measurement error is larger, and subject matter is as follows：
Ultrasonic liquid level meter
Because the velocity of sound is relevant with temperature, but actual measurement water body or air ambient temperature distributing measuring are difficult, therefore the velocity of sound
Compensation is inaccurate, causes measured result error very big.
Pressure resistance type liquid level gauge
Because the drift of piezoresistance liquid level meter own temperature is big, when tested water body is rocked by Lidar Equation, by the dynamic pressure shadow of water
Ring, cause measured result error very big.
Angular coding float type level gauge
Need to overcome starting torque because the measurement wheel of encoder is rotated, suffering from this float movement can not completely and liquid level
Height change is synchronous, and float is rocked acutely under floating evaporating field, Lidar Equation, causes measured result error very big.
The content of the invention
Invention provides a kind of floating evaporation from water surface station liquid level device for accurately measuring, present apparatus choosing according to the deficiencies in the prior art
With magneto strictive sensor as core measurement part, reduced by hanging mounting means between sensor sensing axle and ball float
Frictional force, it is ensured that ball float height change changes Complete Synchronization to improve measurement accuracy with water surface elevation, using law of connected vessels simultaneously
Weaken wave disturbance factor to improve measurement accuracy using current limliting buffer unit.
Technical scheme：
One kind floating evaporation from water surface station liquid level device for accurately measuring, including instruction case and evaporator above deck be installed,
The bottom of the instruction case and evaporator is in below water surface curve, and suspension is provided with barrel cover in the instruction case, pacifies in barrel cover
Measuring cylinder is filled, magnetostriction type sensor, which is arranged in barrel cover, to be used to measure the water level in measuring cylinder, magnetostriction type
The inductive axis of sensor is inserted into measuring cylinder, and the magnetic ball float of magnetostriction type sensor is enclosed on inductive axis to be changed with the water surface
Moved up and down along inductive axis, the signal processing unit of magnetostriction type sensor is arranged on outside measuring cylinder, the side of the instruction case
Interface is connected with being offered at identical height on the side wall of evaporator on wall, and the two ends of communicating pipe connect the side wall of instruction case respectively
The connection interface opened up on the upper and side wall of evaporator realizes that instruction case is connected with evaporator, and measuring cylinder on the wall of instruction case side with opening
If connected entrance connected by connecting tube, the connection opened up on " L " the shape connector and the side wall of evaporator set in evaporator
Orifice, communicating pipe, connection interface, " L " shape connector and connecting tube are engaged the water realized in measuring cylinder and evaporator
Mutually circulation, the end of " L " shape connector is additionally provided with limitation measuring cylinder and evaporator water convection velocity current limliting diaphragm.
The instruction case inside top is provided with lower draw-bar, and the upper extension being engaged with lower draw-bar is provided with the upper end of barrel cover
Hook, upper hook and lower draw-bar, which coordinate, causes barrel cover and measuring cylinder to be in plumbness all the time.
Connecting tube between the connected entrance opened up in the measuring cylinder and instruction case side wall is internal diameter 8mm flexible pipe, it is ensured that
Barrel cover and measuring cylinder are in plumbness all the time during instruction case run-off the straight.
The bottom of the measuring cylinder, which is offered, causes the inductive axis of magnetostriction type sensor to keep vertical positioning hole.
The center of the magnetic ball float offers the middle through-hole for being conveniently inserted in inductive axis, and magnetic ball float is freely floated
Middle through-hole keeps vertical under state.
The magnetic ball float middle through-hole diameter is than the sensing big 1mm of shaft diameter, axis keeping parallelism each other during work.
The external diameter of the magnetic ball float is 100mm, and density is 0.55g/cm3, water line is close to floating under free floating condition
In the middle part of ball, it is ensured that ball float is synchronized with the movement most sensitive with the water surface.
The current limliting diaphragm it is tight stick to " L " shape connector end, the current limliting diaphragm thickness is 0.5mm, current limliting
A diameter of 2mm hole, limitation measuring cylinder and evaporator water convection velocity are provided with the middle part of diaphragm.
The technique effect of the present invention：
1) this measurement apparatus technology realizes that easily measurement accuracy is high, can control measurement error within 0.2mm,
Well solve floating evaporation station liquid level accurate measuring technique problem, in the south water to north source Danjiangkou Reservoir come into operation with
Come, monitoring effect is good, evaporation information gathering automation is really become a reality.
2) special construction of current limliting diaphragm is with the ball valve with aperture, compared with the tubule of internal diameter, and the mobility of water is more preferable, no
Easily there is the flowing that air embolism interdicts water, be not in the not contour phenomenon of linker or so liquid level.
3) this measurement apparatus is simple in construction, easy to maintenance, with low cost, with good market popularization value.
4) the magneto strictive sensor technology mature that this measurement apparatus is selected, has very high resolving power, can recognize
The micro-displacement of 0.01mm sizes, meets observation criteria technical requirements, and it is obvious to compare technical advantage with congenerous instrument；Mangneto is stretched
Contracting sensor construction is simple, small volume, convenient for installation and maintenance, it is only necessary to opens an aperture in container top, inserts inductive axis, so
Tightly it can be used with a nut handle afterwards.Being compared with congenerous sensor has very high price advantage, is pushed away with good market
Wide value.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is instruction case mounting structure schematic diagram of the present invention；
Fig. 3 is magnetic floating ball structure schematic diagram of the present invention；
Fig. 4 is current limliting diaphragm structure schematic diagram of the present invention；
Fig. 5 is ball float through hole vertical calibrating installation signal figure structure schematic representation；
Fig. 6 is inductive axis of the present invention scheme of installation in measuring cylinder.
Label is represented respectively in figure：1- instruction cases, 2- evaporators, 3- measuring cylinders, 4- communicating pipes, 5- barrel covers, 6- magnetic are floated
Ball, 7- signal processing units, 8- inductive axis, 9- current limlitings diaphragm, 10- lower draw-bars, hook on 11-, 12- through holes, 13- communicating pipes,
14- " L " shapes connector, 31- positioning holes, 91- circular holes.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings：
As Figure 1-Figure 5, a kind of floating evaporation from water surface station liquid level device for accurately measuring, including install above deck
Instruction case 1 and evaporator 2, the bottom of the instruction case 1 and evaporator 2 are in below water surface curve, suspension peace in the instruction case 1
Equipped with barrel cover 5, measuring cylinder 3 is installed in barrel cover 5, magnetostriction type sensor, which is arranged in barrel cover 5, to be used in measuring cylinder
Water level is measured, and the inductive axis 8 of magnetostriction type sensor is inserted into measuring cylinder 3, the magnetic of magnetostriction type sensor
Ball float 6 is enclosed on inductive axis 8 to move up and down with water surface change along inductive axis, the signal processing unit 7 of magnetostriction type sensor
It is arranged on outside measuring cylinder 3, interface is connected with being offered at identical height on the side wall of evaporator 2 on the side wall of the instruction case 1,
The two ends of communicating pipe 4 connect on the side wall of instruction case 1 and to realize instruction case with the interface that connects opened up on the side wall of evaporator 2 respectively
1 is connected with evaporator 2, and measuring cylinder 3 is connected with the connected entrance opened up on the side wall of instruction case 1 by connecting tube 13, in evaporator 2
" L " the shape connector 14 set and the connection orifice opened up on the side wall of evaporator 2, communicating pipe 4, connection interface, " L " shape
Connector 14 and connecting tube 13, which are engaged, realizes that measuring cylinder 3 mutually circulates with the aqueous phase in evaporator 2, " L " shape connector 14
End is additionally provided with limitation measuring cylinder 3 and the water convection velocity current limliting diaphragm 9 of evaporator 2.
Lower draw-bar 10 is installed below the upper side wall of instruction case 1, is provided with and is engaged with lower draw-bar 10 in the upper end of barrel cover 5
Upper hook 11, upper hook 11 and lower draw-bar 10, which coordinate, causes barrel cover 5 and measuring cylinder 3 to be in plumbness all the time.
Connecting tube 13 between the connected entrance opened up in the measuring cylinder 3 and the side wall of instruction case 1 is internal diameter 8mm flexible pipe,
Ensure that barrel cover 5 and measuring cylinder 3 are in plumbness all the time during 1 run-off the straight of instruction case.
The inductive axis 8 of magnetostriction type sensor is caused to keep hanging down as shown in fig. 6, the bottom of the measuring cylinder 3 is offered
Straight positioning hole 31.
There is the middle through-hole 12 for being conveniently inserted in inductive axis 8 at the middle part of magnetic ball float 6 of sensor as shown in Figures 2 and 3, pacifies
First carrying out posture calibration under natural floating state before dress makes through-bore axis keep vertical.Ball float pose calibrating method such as Fig. 5,
There is 2 points of A, the B of a plumb line by bottom surface on container in water container, ball float is swum on the water surface, one is set in A points
The light source of individual high brightness, the diameter of light source is approximate with the through hole bore of ball float, and mobile ball float makes the lower end of through hole face light source,
If through-bore axis is not vertical during floating, light will be from the point of view of C to a hot spot, in the adhesion of ball float lower left side through ball float through hole
The metallic particles of appropriate weight changes the posture of ball float, it is ensured that on the premise of mouth and light source are aligned under through hole, when seeing in hot spot
The through hole that the heart is adjusted to ball float during B points is just vertical.
The axis of so inductive axis and ball float through hole all keeps vertical, and inductive axis is parallel with the axis of ball float through hole, axle and
Pressure between ball is just greatly reduced, frictional force very little during relative motion, and ball float and surface motions are synchronous, now measurement accuracy pole
It is high.
The center of magnetic ball float 6 offers the middle through-hole 12 for being conveniently inserted in inductive axis 8, and magnetic ball float 6 freely floats
Middle through-hole 12 keeps vertical under floating state.The diameter of 6 middle through-hole of magnetic ball float 12 than the big 1mm of diameter of inductive axis 8, during work that
This axis keeping parallelism.The external diameter of magnetic ball float 6 is 100mm, and density is 0.55g/cm3, water line connects under free floating condition
In the middle part of nearly ball float, it is ensured that ball float is synchronized with the movement most sensitive with the water surface.Even if there is friction to cause ball asynchronous with surface motions, Yin Ke
The measurement error that takes frictional force generation is minimum, and (float ball density is to increase spheroid in the steady of the water surface slightly larger than 0.50g/cm3
Degree).Through-hole diameter is 14mm, a diameter of 13mm of inductive axis, and the average distance for so ensureing inductive axis and ball float is 0.5mm
(because the viscous force apart from too near water can increase measurement error, too far can be too big because of ball float and inductive axis relative position luffing,
Increase measurement error on the contrary).
As Figure 1 and Figure 4, what the current limliting diaphragm 9 was tight sticks to the end of " L " shape connector 14, the current limliting diaphragm
9 thickness are 0.5mm, and the middle part of current limliting diaphragm 9 is provided with measuring cylinder 3 and evaporation under a diameter of 2mm hole 91, limitation Lidar Equation
The water convection velocity of device 2.
The error that so reduction wave disturbance factor is brought to greatest extent, liquid level measurement precision is high.Experiment proves current limliting
The endoporus of diaphragm also should not be too small, and otherwise the obvious delayed evaporator of liquid level rise during rainfall day in measuring cylinder, causes measurement to be tied
Fruit distortion.
Claims (8)
1. one kind floating evaporation from water surface station liquid level device for accurately measuring, including instruction case and evaporator above deck, institute are installed
The bottom for stating instruction case and evaporator is in below water surface curve, it is characterised in that：Suspension is provided with barrel cover in the instruction case,
Measuring cylinder is installed, magnetostriction type sensor, which is arranged in barrel cover, to be used to measure the water level in measuring cylinder, magnetic in barrel cover
Cause the inductive axis of telescopic sensor to be inserted into measuring cylinder, the magnetic ball float of magnetostriction type sensor be enclosed on inductive axis with
Water surface change is moved up and down along inductive axis, and the signal processing unit of magnetostriction type sensor is arranged on outside measuring cylinder, the instrument
Interface is connected with being offered at identical height on the side wall of evaporator on the side wall of device cabinet, and the two ends of communicating pipe connect instrument respectively
The connection interface opened up on the side wall of cabinet and on the side wall of evaporator realizes that instruction case is connected with evaporator, measuring cylinder and instruction case
The connected entrance opened up on the wall of side is connected by connecting tube, is opened on " L " the shape connector and the side wall of evaporator set in evaporator
If connection orifice, communicating pipe, connection interface, " L " shape connector and connecting tube are engaged and realize measuring cylinder and evaporation
Aqueous phase in device mutually circulates, and the end of " L " shape connector is additionally provided with limitation measuring cylinder and evaporator water convection velocity current limliting
Diaphragm.
2. a kind of floating evaporation from water surface station liquid level device for accurately measuring according to claim 1, it is characterised in that：The instrument
Device cabinet inside top is provided with lower draw-bar, is provided with the upper hook being engaged with lower draw-bar in the upper end of barrel cover, upper hook and under
Hook, which coordinates, causes barrel cover and measuring cylinder to be in plumbness all the time.
3. a kind of floating evaporation from water surface station liquid level device for accurately measuring according to claim 1, it is characterised in that：It is described to survey
Connecting tube between the connected entrance opened up on graduated cylinder and instruction case side wall is internal diameter 8mm flexible pipe, it is ensured that instruction case run-off the straight
When barrel cover and measuring cylinder all the time be in plumbness.
4. a kind of floating evaporation from water surface station liquid level device for accurately measuring according to claim 1, it is characterised in that：The magnetic
The center of property ball float offers middle through-hole under the middle through-hole for being conveniently inserted in inductive axis, magnetic ball float free floating condition
Keep vertical.
5. floating evaporation from water surface station according to claim 4 liquid level device for accurately measuring, it is characterised in that：The magnetic is floated
Ball middle through-hole diameter is than the sensing big 1mm of shaft diameter, axis keeping parallelism each other during work.
6. a kind of floating evaporation from water surface station liquid level device for accurately measuring according to claim 1, it is characterised in that：It is described to survey
The bottom of graduated cylinder, which is offered, causes the inductive axis of magnetostriction type sensor to keep vertical positioning hole.
7. a kind of floating evaporation from water surface station liquid level device for accurately measuring according to claim 1, it is characterised in that：The magnetic
Property ball float external diameter be 100mm, density is 0.55g/cm3, water line is close in the middle part of ball float under free floating condition, it is ensured that ball float
It is synchronized with the movement with the water surface most sensitive.
8. a kind of floating evaporation from water surface station liquid level device for accurately measuring according to claim 1, it is characterised in that：The limit
Stream diaphragm it is tight stick to " L " shape connector end, the current limliting diaphragm thickness is to be provided with one in the middle part of 0.5mm, current limliting diaphragm
Individual a diameter of 2mm hole, limitation measuring cylinder and evaporator water convection velocity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710343552.6A CN106989800A (en) | 2017-05-16 | 2017-05-16 | One kind floating evaporation from water surface station liquid level device for accurately measuring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710343552.6A CN106989800A (en) | 2017-05-16 | 2017-05-16 | One kind floating evaporation from water surface station liquid level device for accurately measuring |
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| CN106989800A true CN106989800A (en) | 2017-07-28 |
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| CN201710343552.6A Pending CN106989800A (en) | 2017-05-16 | 2017-05-16 | One kind floating evaporation from water surface station liquid level device for accurately measuring |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478277A (en) * | 2017-09-30 | 2017-12-15 | 北京尚水信息技术股份有限公司 | The measurement apparatus and its measuring method of pipe with small pipe diameter non-full pipe flow and concentration |
| CN109341817A (en) * | 2018-11-16 | 2019-02-15 | 中国水利水电科学研究院 | A kind of monitoring device of Water Evaporation |
| CN113029282A (en) * | 2021-04-13 | 2021-06-25 | 成减 | Water level monitoring device and method for hydraulic engineering management |
| CN114791283A (en) * | 2022-04-24 | 2022-07-26 | 华中科技大学 | Device for dynamically eliminating influence of corrugations on water surface evapotranspiration measurement |
| CN113124964B (en) * | 2021-05-06 | 2022-08-02 | 承德水创工程项目咨询有限公司 | Water level measuring device for reservoir engineering management |
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| CN113124964B (en) * | 2021-05-06 | 2022-08-02 | 承德水创工程项目咨询有限公司 | Water level measuring device for reservoir engineering management |
| CN114791283A (en) * | 2022-04-24 | 2022-07-26 | 华中科技大学 | Device for dynamically eliminating influence of corrugations on water surface evapotranspiration measurement |
| CN114791283B (en) * | 2022-04-24 | 2023-10-20 | 华中科技大学 | Device for dynamically eliminating influence of wave on water surface evaporation and emission measurement |
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