CN104748801B - A kind of water tank goes out the flow measurement device of stream - Google Patents
A kind of water tank goes out the flow measurement device of stream Download PDFInfo
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- CN104748801B CN104748801B CN201510151339.6A CN201510151339A CN104748801B CN 104748801 B CN104748801 B CN 104748801B CN 201510151339 A CN201510151339 A CN 201510151339A CN 104748801 B CN104748801 B CN 104748801B
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Abstract
The invention discloses the flow measurement device that a kind of water tank goes out stream, including：The Experimental Water Tank of side cornice outflow port；It is arranged on the liquid gas shift pressure measurement cylinder in the Experimental Water Tank, the bottom of the liquid gas shift pressure measurement cylinder is connected with the inner space of the Experimental Water Tank, the side wall of the liquid gas shift pressure measurement cylinder is provided with outlet discharge outlet, and the upper edge of the outlet discharge outlet is flushed with the axis horizontal plane of the outflow port；It is connected with liquid gas shift pressure measurement cylinder, the differential fluid pressure sensor for detecting the liquid gas shift pressure measurement cylinder compressed air and outside air pressure difference；It is connected with the differential fluid pressure sensor, the pressure difference for differential fluid pressure sensor to be detected changes into the micro computer of outflow port flow.The present invention can easily digitize momentum testing equipment and aperture and the jet flow of aperture and ozzle in ozzle experiment instrument in accurate measurement hydrodynamics basic experiment, and with good teaching efficiency.
Description
Technical field
The present invention relates to experimental measurement field, more particularly to a kind of aperture and ozzle class water tank based on acting head go out stream
Flow measurement device.
Background technology
Hydraulics and hydrodynamics are many professional main specialized core courses of engineering and polytechnic universities.Modern hydraulics is to build
Stand in experiment, theory, calculate on three big pillars, therefore, experiment is indispensable content in teaching link.Wherein, aperture
It is one of important study content of the teaching field with vertical water outflowing jet.The perforate on container vertical wall, fluid flows out by aperture
Flow phenomenon orifice outflow, it can determine going out under head to go out stream under stream or varying head that it, which goes out stream condition, can be stream
Enter in air or flow into the fluid of same medium.It is about orifice diameter 3 that a length is installed on the circumference in aperture
~4 times of short tube, such short tube claims cylindrical outer tube mouth.Ozzle can be divided into shape：Streamlined ozzle, cylindrical outer tube
Mouth, conical ozzle.Fluid flows through the short tube, and in Outlet Section formation full-section pipe-flow, this flow phenomenon is referred to as vertical water outflowing jet.
It is used as hydraulic facilities common in engineering --- aperture ozzle, the important Hydrodynamics in Teaching related to aperture ozzle
Experiment just has aperture ozzle experiment and momentum law.This domestic piston type with patent of invention number of 2 kinds of experiment teaching instruments
The aperture ozzle experiment instrument of momentum law tester and Tape movement contact is used by domestic hundreds of universities and colleges for representative, in reality
It is required for measuring the aperture vertical water outflowing jet flow under multigroup different heads in experimental teaching, to verify that the hydrodynamics of correlation is basic
Law.Tradition is needed in the case where stablizing head when determining orifice tube mouth flow, with gravimetric method (i.e. by manual time-keeping, in orifice tube
The downstream tank outflow port that mouth goes out stream accesses a water with water drum, and electronic scale conversion of weighing obtains water volume, then divided by meter
When the time can obtain out stream flow) or volumetric method (directly access out flowing water with big graduated cylinder, and with manual time-keeping) go measurement
Aperture ozzle goes out flow, wastes time and energy, experimental situation also easily do it is wet do dirty, flow measurement side of the student to this quasi-tradition
Experimental teaching purpose is can reach after calligraphy learning 1~2 time, it is not necessary to each hydrodynamic calculations are repeated this kind of to pass by hand
The measuring method of system, easily wastes the valuable experimental implementation time.Meanwhile, traditional flow-measuring method also can not measured hole in real time
Mouthful ozzle goes out flow.
With the development of modern measurement technology, the laboratory apparatus in other every profession and trade fields modern measurement technology innovation and
Using upper far ahead of hydrodynamics class experiment teaching instrument.And it is this kind of for the experiment of aperture ozzle and momentum law
Laboratory apparatus wants to realize that comprehensively digitlization measures the network remote even realized in the future towards MOOC and tested, and the first step will be solved
Being how certainly realizes the digitlization real-time measurement of aperture vertical water outflowing jet flow.
A variety of modern measure about pipeline, open channel liquid flow measurement are shown with public technology data on the market to fill
Put and patent of invention, but also You nothing preferable for the aperture vertical water outflowing jet flow under desktop type laboratory apparatus low pressure head
High-precision digital real-time measurement apparatus.
The content of the invention
The invention provides the flow measurement device that a kind of water tank goes out stream, in that context it may be convenient to digitizes accurate measurement fluid force
The momentum testing equipment and aperture and the jet flow of aperture and ozzle in ozzle experiment instrument in basic experiment are learned, and with good
Teaching efficiency.
A kind of water tank goes out the flow measurement device of stream, including：
The Experimental Water Tank of side cornice outflow port；
It is arranged on the liquid gas shift pressure measurement cylinder in the Experimental Water Tank, the bottom of the liquid gas shift pressure measurement cylinder and the reality
Test the inner space connection of water tank, the side wall of liquid gas shift pressure measurement cylinder is provided with outlet discharge outlet, the outlet discharge outlet it is upper
Edge is flushed with the axis horizontal plane of the outflow port；
It is connected with liquid gas shift pressure measurement cylinder, for detecting that the liquid gas shift pressure measurement cylinder compressed air and the external world are empty
The differential fluid pressure sensor of draught head；
It is connected with the differential fluid pressure sensor, the pressure difference for differential fluid pressure sensor to be detected changes into outflow port
The micro computer of flow.
In the present invention, during experiment, Experimental Water Tank is by water pump water-filling, and the swing that liquid level has larger fluctuation rises, now
The water inlet (can set one or more) for enough flows that liquid gas shift pressure measurement cylinder (abbreviation pressure measurement cylinder) passes through bottom can same stepping
Water, bottom water inlet mode can allow Experimental Water Tank wave water to have current stabilization effect, pressure measurement cylinder water level inside can be made to increase very steady.With
Liquid gas shift pressure measurement cylinder water level inside with Experimental Water Tank reclaimed water bit synchronization to rise, air can lead to upwards in liquid gas shift pressure measurement cylinder
Outlet discharge outlet is crossed to be discharged in the protection straight tube of outside, then by protecting straight tube to discharge upwards.With in outside Experimental Water Tank
Water level raises and is higher than pressure measurement cylinder, and water level steadily rises in the contour outlet discharge outlet for touching upper portion side wall in correspondence pressure measurement cylinder
Along when, pressure measurement cylinder top can close one section of air column and can not discharge, and now pressure measurement cylinder water level inside is no longer raised.
In the small water tank of this kind of desktop type, because head is not high (being less than 100cm water columns), the hollow air pressure contracting of pressure measurement cylinder is brought
Head height error it is very limited (<0.12%, can ignore), so the compressed air pressure of pressure measurement cylinder inner sealing is reality
Water in Water Tanks body phase is tested for aperture and the acting head of ozzle axis horizontal plane.
But here, to add an insulation blocking pipe why outside outlet discharge outletAlthough Experimental Water Tank and pressure measurement cylinder are interior
Water level rises basic synchronization but still has several millimeters of gaps, and because also having surge swing when water level rises in Experimental Water Tank, if
Without insulation blocking pipe, the outlet discharge outlet of pressure measurement cylinder side wall does not wait also air in cylinder to be emptied to edge on aperture, will be by experiment water
Rise liquid level in case to seal one step ahead, due to the surface tension overlaying influence of aperture, air column is difficult to be discharged in pressure measurement cylinder
Position, the acting head error that this sample liquid gas shift is measured will be very big, up to more than 10%.There is the sealed insulation blocking of this root
Pipe, due to bottom inlet opening very little, in protection pipe, liquid level, which rises, lags far behind the liquid level rate of climb in pressure measurement cylinder, therefore phase
When foring a unimpeded exhaust passage in outlet discharge outlet and Experimental Water Tank water body are kept apart, it is ensured that in pressure measurement cylinder
Liquid level is risen in outlet discharge outlet along preceding, and air unimpeded can pass through this isolation air flue and discharge in cylinder.And when pressure measurement cylinder
Interior liquid level reaches out edge in outlet discharge outlet, seals after pressure measurement cylinder upper air post, water can pass through outlet draining again in pressure measurement cylinder
Mouth outflow is communicated with extraneous Experimental Water Tank water body.
Whole experimental provision wants measurement of discharge will also be by demarcation：After after Experimental Water Tank overflow fixed level, pass through fluid pressure
Gap sensor and micro computer, can measure the acting head pressure based on ozzle and aperture, then with gravimetric method, measure aperture and ozzle
Go out flow, so that it may form one group of nominal data.
According to the physics law of aperture and ozzle and go out to flow flow formula：
Wherein, QvFor aperture or vertical water outflowing jet flow, A is aperture ozzle area, H0To act on the axis in aperture and ozzle
The head height of horizontal plane, μ (is directed to the aperture of same breed laboratory apparatus for the coefficient related to aperture ozzle necked-down section etc.
Although the aperture of ozzle design or ozzle shape size are consistent, because of actual processing error, the μ values of every are all different).
By upper, the flowing out stream flow of penetrating of fixed aperture and ozzle only goes out stream with acting on this on a casing vertical sidewall
Mouthful acting head it is related, only need to one group of Q for the laboratory apparatus of every fixed orifice and ozzlev-H0Nominal data, i.e.,
μ values are can determine that, the flow formula equation is write into micro computer by program, you can aperture ozzle is acted on by measurement in real time
Acting head pressure, is converted by internal processes, and the real-time traffic of aperture ozzle is shown in LED gauge outfits.
The isolation of the outlet discharge outlet is protected to protect preferably, being fixed with the outer wall of described liquid gas shift pressure measurement cylinder
Straight tube is protected, the bottom of the insulation blocking straight tube, which is carried, carries Inlet and outlet water through hole, the insulation blocking straight tube on bottom surface, the bottom surface
Top for sky.The top of described insulation blocking straight tube is flushed with the top surface of described liquid gas shift pressure measurement cylinder.The isolation
Protection straight tube is arranged on the periphery of the outlet discharge outlet and is fixed on the outer wall of described liquid gas shift pressure measurement cylinder.
Preferably, described outflow port is aperture or ozzle.
Preferably, the bottom of described liquid gas shift pressure measurement cylinder is provided with what is communicated with the inner space of the Experimental Water Tank
Connected entrance, for being connected with the Experimental Water Tank.The bottom and the bottom surface of the Experimental Water Tank of the liquid gas shift pressure measurement cylinder are consolidated
It is fixed, or, the side wall of the side wall and the Experimental Water Tank of the liquid gas shift pressure measurement cylinder is fixed.
Preferably, be provided with described Experimental Water Tank by Experimental Water Tank be divided into overflow into water workspace and overflow area every
Plate, weir divider is arranged in Experimental Water Tank, is fixed on the bottom surface of Experimental Water Tank, two parts, one will be divided into inside Experimental Water Tank
Part is water inlet workspace, and liquid gas shift pressure measurement cylinder is arranged on into water workspace, the outflow port of Experimental Water Tank be also disposed at into
In water workspace.
Further preferably, the bottom of water inlet workspace is provided with water inlet, described Experimental Water Tank in described Experimental Water Tank
Middle overflow area is provided with delivery port.The water that water inlet workspace is overflowed is discharged by delivery port.
Still more preferably, described delivery port is arranged on the bottom of overflow area in the Experimental Water Tank, facilitates draining.
Described weir divider is provided with spout hole, the spout hole and is plugged with plug., can when needing adjustment overflow position
Realized by opening plug.Different spout holes can be set on the different height of weir divider, overflow so as to preferably adjust
Flowing water position.
Preferably, the measurement mouth in described differential fluid pressure sensor leads to air, described differential fluid pressure sensor
In another measurement mouthful be tightly connected by conduit and the liquid gas shift pressure measurement tin.
Further preferably, described conduit inserts one end of the liquid gas shift pressure measurement cylinder positioned at the outlet discharge outlet
Between upper edge and the top surface of liquid gas shift pressure measurement cylinder, and higher than the upper edge of the outlet discharge outlet.
Compared with prior art, the invention has the advantages that：
Cleverly coordinate modern measurement technology using the acting head conversion of aperture ozzle, realize the real-time of aperture ozzle
Flow detection, inspection is digitized for the real-time traffic that this kind of experimental teaching quasi-instrument of hydrodynamics realizes aperture and ozzle first
Survey, be easy to that the upgrading even data network of overall instrument from now on is remotely transmitted, remote web experiment lays the first stone.
By the liquid gas voltage stabilizing switch technology of pressure measurement cylinder, for the measurement of low pressure head within routine 1m on experimental bench, keep away
Exempt from when liquid is directly contacted with differential fluid pressure sensor airtight connection pipe due to existing it is difficult to liquid caused by the minute bubbles of emptying
The pressure error for almost 10% rank that body surface face tension band comes.Substantially increase the Common fluids differential pressure pickup under 1m heads
Fluid pressure accuracy of detection under low pressure head pressure.
Positioning outlet discharge outlet by the UNICOM on pressure measurement cylinder top can automatically determine relative to aperture ozzle acting head
Elevation zero on the basis of the axis horizontal plane of reference elevation, i.e. aperture ozzle.Hole will act on by liquid gas shift pressure measurement cylinder again
The acting head pressure of mouth ozzle is conducted to differential pressure pickup by compressed air, and what it is due to differential pressure pickup measurement is relatively large
The pressure of air pressure, thus can direct convenience measure the acting head pressure for acting on aperture ozzle, then by simply demarcating
Aperture ozzle can be shown by micro computer conversion goes out flow.The front end of this ingenious utilization fluid mechanics principle design
Measurement apparatus, while DATA REASONING is simple direct, also with good teaching efficiency.The application of such as current-stabilizing structure, every
From breather pipe principle, the hydrostatic pressure transfer theory of liquid gas shift, aperture ozzle flow rate calculation principle etc., it is particularly suitable for teaching real
Test the innovative teaching of instrument.
Brief description of the drawings
Fig. 1 is the structural representation for the flow measurement device that water tank of the present invention goes out stream.
Embodiment
As shown in figure 1, go out the flow measurement device of stream for water tank of the present invention, including：Experimental Water Tank 7 with outflow port 8；If
The liquid gas shift pressure measurement cylinder 2 in Experimental Water Tank 7 is put, the bottom of liquid gas shift pressure measurement cylinder 2 connects with the inner space of Experimental Water Tank 7
Logical, the side wall of liquid gas shift pressure measurement cylinder 2 is provided with outlet discharge outlet 5, the upper edge of the outlet discharge outlet 5 and the axis water of outflow port 8
Plane 20 is flushed；It is connected with liquid gas shift pressure measurement cylinder 2, for detecting liquid gas shift pressure measurement 8 compressed airs of cylinder and outside air
The differential fluid pressure sensor 10 of pressure difference；It is connected with differential fluid pressure sensor 10, for detect differential fluid pressure sensor 10
Pressure difference changes into the micro computer of the flow of outflow port 8.
The semicircle insulation blocking straight tube 3 of protection outlet discharge outlet 5, semicircle are fixed with the outer wall of liquid gas shift pressure measurement cylinder 2
The bottom of insulation blocking straight tube 3, which is carried, carries Inlet and outlet water through hole 6 on bottom surface, the bottom surface, the top of semicircle insulation blocking straight tube 3 is
It is empty.The top of semicircle insulation blocking straight tube 3 is flushed with the top surface of liquid gas shift pressure measurement cylinder 2.Semicircle insulation blocking straight tube 3 is arranged on
The periphery of outlet discharge outlet 5 is simultaneously fixed on the outer wall of liquid gas shift pressure measurement cylinder 2.Outflow port 8 is aperture or ozzle.
The bottom of liquid gas shift pressure measurement cylinder 2 is provided with the connected entrance 1 that is communicated with the inner space of Experimental Water Tank 7, for reality
Water tank 7 is tested to connect.The bottom and the bottom surface of Experimental Water Tank 7 of liquid gas shift pressure measurement cylinder 2 are fixed.
Provided with the weir divider 15 being divided into Experimental Water Tank 7 into water workspace and overflow area, weir divider in Experimental Water Tank 7
15 are arranged in Experimental Water Tank 7, are fixed on the bottom surface of Experimental Water Tank 7, will be divided into two parts inside Experimental Water Tank 7, a part is
Intake workspace, and liquid gas shift pressure measurement cylinder 2 is arranged on into water workspace, and the outflow port of Experimental Water Tank 7 is also disposed at into water conservancy project
Make in area.
The bottom of water inlet workspace is provided with overflow area in water inlet 16, Experimental Water Tank 7 and is provided with delivery port in Experimental Water Tank 7
17.The water that water inlet workspace is overflowed is discharged by delivery port 17.
Delivery port 17 is arranged on the bottom of overflow area in Experimental Water Tank 7, facilitates draining.
Weir divider 15 is provided with spout hole, the spout hole and is plugged with plug 18, plug 19.Can be in weir divider 15
Different spout holes are set on different height, so as to preferably adjust flood level.When needing adjustment overflow position, it can pass through
Plug 18, plug 19 is opened to realize.
Another measurement mouthful that a measurement mouth in differential fluid pressure sensor 10 leads in air, differential fluid pressure sensor 10 passes through
Conduit (hollow pressure conducting tube 12, flexible pipe 9 and breather pipe 4) is tightly connected with liquid gas shift pressure measurement cylinder 2.Conduit insertion liquid gas turns
The one end for changing pressure measurement cylinder 2 is located between the upper edge of outlet discharge outlet 5 and the top surface of liquid gas shift pressure measurement cylinder 2, and higher than outlet row
The upper edge at the mouth of a river 5.
Water tank of the present invention goes out aperture and ozzle class water tank of the flow measurement device of stream specially based on acting head and goes out stream
Flow measurement device, the Experimental Water Tank 7 of measurement of discharge is treated with a fenestrated or vertical water outflowing jet, such Experimental Water Tank is big
Sizable application：Generally there is a pump intake 16, one piece of weir divider 15 less than tank height is by water tank internal insulation into 2
Liquid level goes out higher than weir divider 15 i.e. overflow after part, water tank water intake, passes through delivery port 17 and discharges Experimental Water Tank 7.In order to obtain
Multiple overflow constant water levels are obtained, this kind of Experimental Water Tank can open up several overflow macropores on weir divider 15 in different height, and
Clogged with plug 18,19, the overflow constant water level that different height plug just can adjust different height is pulled out as needed.Horizontal plane
21 be overflow constant water level when not pulling out plug.
Liquid gas shift pressure measurement cylinder 2 (also abbreviation pressure measurement cylinder 2) provided with a transparent organic glass material in Experimental Water Tank 7,
Pressure measurement cylinder 2 is a diameter 5cm or so cylinder, and the aperture ozzle axis horizontal line 1cm of stream is highly gone out higher than Experimental Water Tank 7, is had
Sealer glass cover, no bottom surface, leaving aperture ozzle, distance is fixed on the bottom surface of Experimental Water Tank 7 with glue bonding farther out.Survey
Pressure cylinder sidewall bottom is provided with the small UNICOM mouthful 1 of semicircle, and (sidewall bottom can open several small UNICOMs mouthful more along the circle of bottom one, play filtering
Current stabilization water inlet is acted on, it is ensured that fluid level is stable in cylinder rises), can be logical with the aqueous phase of Experimental Water Tank 7.Pressure measurement 2 upper portion side walls of cylinder are opened
Have and flushed along the horizontal plane with going out the aperture ozzle axis horizontal plane 20 of stream in an outlet discharge outlet 5, outlet discharge outlet 5, this goes out
The outer wall of gas discharge outlet 5 also vertical seal is bonded with a semicircle insulation blocking straight tube 3 for slicing off a half side wall, semicircle insulation blocking
The bottom of straight tube 3, which has on sealing bottom surface, bottom surface, an Inlet and outlet water aperture 6, and top surface is sky.
Pressure measurement 2 top seals of cylinder are inserted with stainless steel hollow vent pipe 41 thinner, internal diameter about 1.5mm, outside breather pipe 4
Wall is communicated by 502 glue and pressure measurement 2 top perforate inwall hermetic seal adhesions of cylinder with the 2 upper air posts sealed in pressure measurement cylinder,
The outer valve protrusion pressure measurement 2 about 1cm or so of cylinder of cylinder, salable overcoat is adapted to the PVC transparent flexible pipe of internal diameter as ventilation pressure measurement connection
Flexible pipe 9 (namely PVC hose 9), PVC hose 9 possesses preferable elasticity, can be tightly it is outer be enclosed on the outside of stainless steel breather pipe,
This experiment is that in 1.1 times of atmospheric pressures, PVC hose 9 can accomplish good airtight company with stainless steel breather pipe 4 compared with low pressure
Connect.PVC hose 9 is about 80cm, draws the interface sky that the outer other end of Experimental Water Tank 7 is tightly enclosed on differential fluid pressure sensor 10
On heart pressure transmission pipe 12, differential fluid pressure sensor 10 is relative pressure sensor, with 2 Hes of hollow pressure conducting tube 11
12, hollow pressure conducting tube 11 is communicated with air.
During experiment, desktop level is mixed up, Experimental Water Tank 7 on the table is put by water pump water-filling, liquid level can be with undaform
Swing and rise, now pressure measurement cylinder 2 makes pressure measurement cylinder water level inside substantially same by the synchronous current stabilization filtered water inlet of bottom water inlet 1
Step is steady to be risen, and pressure measurement 2 inner airs of cylinder can be discharged upwardly through outlet discharge outlet 5, then be arranged upwards through insulation blocking straight tube 3
Fall, as water level is increased to in outlet discharge outlet 5 along the horizontal plane in outside Experimental Water Tank 7, insulation blocking straight tube 3 is due to bottom
Inlet opening 6 is smaller, and water level rises slowly in pipe, can form an isolation airway, can make the water in pressure measurement cylinder of outlet discharge outlet 5
Position is increased on aperture 5 before edge, will not seal outlet discharge outlet 5 by extraneous Experimental Water Tank reclaimed water, it is to avoid 2 air in pressure measurement cylinder
The systematic error of bit strip is not discharged to.When water level is steadily risen in outlet discharge outlet 5 along the horizontal plane in pressure measurement cylinder 2, that is, go out stream
Aperture ozzle axis horizontal plane 20 when, 2 tops of pressure measurement cylinder can close one section of air column and can not discharge, inside now pressure measurement cylinder 2
Water level is no longer raised, and water can flow out from the outlet discharge outlet 5 of side wall in pressure measurement cylinder 2, with the water body UNICOM of Experimental Water Tank 7.Therefore flow
Body differential pressure pickup 10 is by the hollow pipe 4 of gas circuit UNICOM, and survey is exactly the relatively large air pressure of seal compression air column in pressure measurement cylinder 2
Pressure.In the pressure signal feeding micro computer that differential fluid pressure sensor 10 is measured, through being converted inside micro computer by calibration formula
After good, aperture ozzle flow number is shown in the LED screen of microcomputer-recognized intelligent gauge outfit 13.
Placed against experiment instrument side, convenient that the connected electrical measuring instrument 14 of PVC hose 9 is connected with pressure measurement, electrical measuring instrument 14 includes
Differential fluid pressure sensor 10 and the micro computer digital display meter head 13 of programmable storage, the pressure signal that differential fluid pressure sensor 10 is measured
It can be input in micro computer, be changed through internal A/D, and go out to flow the program of flow formula by micro computer inner orifice or ozzle
Conversion directly displays outflow data in gauge outfit.
When it is implemented, often covering aperture based on acting head and ozzle class water tank goes out the flow measurement device of stream in experiment
Under some stable head of water tank, one group of Q is to flow detectorv-H0Nominal data, i.e., flow according to the stream that goes out of aperture and ozzle
Measure formulaThe μ values of every are calculated to calibrate and come, the program arrange parameter of micro computer gauge outfit is stored in
In.A μ value fixed constant is demarcated, you can according to real-time acting head H0, the hole in real-time measurement experiment instrument each stage
Mouth or vertical water outflowing jet flow.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the field, it can also do on the basis of the above description
Go out other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
Among the obvious changes or variations that Shen goes out is still in protection scope of the present invention.
Claims (10)
1. a kind of water tank goes out the flow measurement device of stream, it is characterised in that including：
The Experimental Water Tank of side cornice outflow port；
It is arranged on the liquid gas shift pressure measurement cylinder in the Experimental Water Tank, the bottom of the liquid gas shift pressure measurement cylinder and the experiment water
The inner space connection of case, the side wall of liquid gas shift pressure measurement cylinder is provided with outlet discharge outlet, the upper edge of the outlet discharge outlet with
The axis horizontal plane of the outflow port is flushed；
It is connected with liquid gas shift pressure measurement cylinder, for detecting the liquid gas shift pressure measurement cylinder compressed air and outside air pressure
The differential fluid pressure sensor of difference；
It is connected with the differential fluid pressure sensor, the pressure difference for differential fluid pressure sensor to be detected changes into outflow port flow
Micro computer.
2. water tank according to claim 1 goes out the flow measurement device of stream, it is characterised in that described liquid gas shift pressure measurement
The insulation blocking straight tube for protecting the outlet discharge outlet is fixed with the outer wall of cylinder, the bottom of the insulation blocking straight tube carries bottom
Inlet and outlet water through hole is carried on face, the bottom surface, the top of the insulation blocking straight tube is sky.
3. water tank according to claim 2 goes out the flow measurement device of stream, it is characterised in that described insulation blocking straight tube
Top be located between the upper edge of the outlet discharge outlet and the top surface of the Experimental Water Tank, and higher than the outlet discharge outlet
Upper edge.
4. water tank according to claim 1 goes out the flow measurement device of stream, it is characterised in that described outflow port is aperture
Or ozzle.
5. water tank according to claim 1 goes out the flow measurement device of stream, it is characterised in that described liquid gas shift pressure measurement
The bottom of cylinder is provided with the connected entrance communicated with the inner space of the Experimental Water Tank.
6. water tank according to claim 1 goes out the flow measurement device of stream, it is characterised in that set in described Experimental Water Tank
Have weir divider Experimental Water Tank being divided into water workspace and overflow area.
7. water tank according to claim 6 goes out the flow measurement device of stream, it is characterised in that enter in described Experimental Water Tank
The bottom of water workspace is provided with overflow area in water inlet, described Experimental Water Tank and is provided with delivery port.
8. water tank according to claim 6 goes out the flow measurement device of stream, it is characterised in that set on described weir divider
There is spout hole, plug is plugged with the spout hole.
9. water tank according to claim 1 goes out the flow measurement device of stream, it is characterised in that described fluid pressure difference sensing
Another measurement mouthful that a measurement mouth in device leads in air, described differential fluid pressure sensor passes through conduit and the liquid gas shift
Pressure measurement cylinder is tightly connected.
10. water tank according to claim 9 goes out the flow measurement device of stream, it is characterised in that described conduit insertion institute
The one end for stating liquid gas shift pressure measurement cylinder is located between the upper edge of the outlet discharge outlet and the top surface of liquid gas shift pressure measurement cylinder,
And higher than the upper edge of the outlet discharge outlet.
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| CN105181027B (en) * | 2015-09-01 | 2017-09-26 | 上海理工大学 | Gas-liquid two-phase reverse flow detection means in pipe |
| CN105590524B (en) * | 2016-03-03 | 2018-01-05 | 鲁东大学 | The hydrodynamic calculations platform of rotary adjustment overflow plate height |
| CN106351170B (en) * | 2016-08-15 | 2018-03-27 | 武汉大学 | It is a kind of to determine head diversion water distributing device |
| CN107174249B (en) * | 2017-04-18 | 2020-02-21 | 南阳师范学院 | Differential pressure type vital capacity measuring device |
| DE102017121426A1 (en) * | 2017-09-15 | 2019-03-21 | Marco Systemanalyse Und Entwicklung Gmbh | Method for level detection |
| CN109443454B (en) * | 2018-11-12 | 2023-10-03 | 北京市水科学技术研究院 | Flow monitoring device and method suitable for limited space |
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