CN107393374A - Suitable for the self-loopa open channel weir flow experimental provision of experimental teaching - Google Patents
Suitable for the self-loopa open channel weir flow experimental provision of experimental teaching Download PDFInfo
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- CN107393374A CN107393374A CN201610330350.3A CN201610330350A CN107393374A CN 107393374 A CN107393374 A CN 107393374A CN 201610330350 A CN201610330350 A CN 201610330350A CN 107393374 A CN107393374 A CN 107393374A
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- water
- water tank
- tank
- flowmeter
- permanent position
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
Abstract
The invention discloses a kind of self-loopa open channel weir flow experimental provision suitable for experimental teaching.Including：The permanent position water tank (1) constant for ensureing water yield；For ensureing the cowling panel group (2) of water outlet level stability；Measure the linker liquid level gauge (3) of liquid level；For measuring the volumetric method water tank flowmeter (4) of actual flow；Ensure the pumping for water pump water tank (5) of device water circulation；Control the water circulating pump (6) of water outlet；Connect the permanent position water tank overflow pipe (7) of permanent position water tank and pumping for water pump water tank；Pump power (8)；Cell body (9).The present invention box volumetric method flowmeter and linker liquid level gauge, reduces and the error brought is measured in experimentation, wherein the box flowmeter of volumetric method can replace method of traditional graduated cylinder with stopwatch combination measurement of discharge by setting permanent position water tank.It is simple to operate the invention belongs to the high-precision real experiment device of laboratory weir flow experiment, it is easy to use, it is safe.
Description
Technical field
The present invention relates to meter proof technical field, and in particular to real suitable for the self-loopa open channel weir flow of experimental teaching
The association area of experiment device flow verification.
Background technology
With the quickening of process of industrialization, water environment pollution getting worse.To carry out the most stringent of water resource in China
Management system, realize reasonable allocation of water resources, it is necessary first to accomplish water consumption measurement accurately and reliably.Discharge of wastewater uses weir notch more
Method determines flow.To coordinate overall project playout or some water flow problems of research, open channel experimental tank need to be built, it is real by means of open channel
Check of foundation subsoil observes flow-shape, describes or shoots with video-corder various current phenomenons in experimentation.Therefore, open channel experimental tank is flat as an experiment
Platform, in engineering fluid mechanics and hydraulics of open channels course experiment teaching and its related field of scientific study, it is widely used, its
Guarantee to weir flow measurement accuracy in Practical Project has important practical value and practice significance.
In the standard set-up calibrating experiment of open-channel meter, commutator and volumetric standard with it is simple and practical the characteristics of, it is general
All over as open channel experiment water outlet water measure equipment.Because open channel experiment variety classes weir notch is applicable measure range of flow difference, standard
Container needs to replace, cumbersome；Water impact is larger in container, and water-level fluctuation is obvious, causes to measure not accurate enough；Standard is held
Device takes up an area big, usual amounts cylinder and stopwatch measurement flow during teaching, but graduated cylinder limited volume, and time of measuring is short when flow is larger, production
The problems such as life relative error is big, it is impossible to guarantee test required precision.
Open channel experimental rig using water pump directly to tank supply water method, by control the aperture of water pump water outlet valve come
Control water flow.Because pumping for water pump power can not keep stable in itself, and Water in Water Tanks position changes because of pumping for water pump,
This makes pumping for water pump speed more uneven, directly result in water pump to weir notch device supply water it is extremely unstable, valve opening is certain
When the changes in flow rate that provides of water pump it is very big, and then influence level measuring on weir, measurement result larger error is occurred.
Therefore, traditional laboratory apparatus needs to constantly bring forth new ideas, than such as whether fluid mechanics principle can be measured into skill with modern
Art is combined, and solves the low-flow high-precision measurement problem in this kind of large-scale teaching experimental device of open channel experimental tank, such
Theory application can actually allow a whole set of experimental provision measurement more accurate.
The content of the invention
The invention provides the self-loopa open channel weir flow experimental provision suitable for experimental teaching, can not only solve volumetric standard
Interior water surface wave is big, the problems such as measuring water level shakiness, moreover it is possible to which according to Flow-rate adjustment vessel volume, the flow for adapting to different weir notches is surveyed
Amount.With using manpower and material resources sparingly, it is simple and convenient practical the characteristics of, be use for laboratory open channel high-precision flow instrument, while also may be used
For real stream calibrating of the environmental administration to sewage, facilitate charging etc..
A kind of self-loopa open channel weir flow experimental provision suitable for experimental teaching, including：
The permanent position water tank constant for ensureing water yield, cowling panel group, measure the linker liquid level gauge of liquid level, groove
Body, for measuring the volumetric method water tank flowmeter of actual flow, ensure the pumping for water pump water tank of device water circulation, control water outlet
Water circulating pump, connect the permanent position water tank overflow pipe of permanent position water tank and pumping for water pump water tank, pump power.
Permanent position water tank；
Described permanent position water tank bottom, is connected with pumping line, and the water flowed out in water pump flows into permanent position via outlet pipe
The lucite tube of water tank bottom, uniformly spill from the apopore in glass tube side wall.
Inside described permanent position water tank, pump outlet updrift side sets overflow plate group, for adjusting permanent position water box liquid
Position height, controls permanent position water tank water yield.
The described permanent position water tank of connection and the permanent position water tank overflow pipe of pumping for water pump water tank, are arranged on the outside of overflow plate group,
The water overflowed from overflow plate is back to pumping for water pump water tank.
Inside described permanent position water tank, pump outlet downstream direction sets cowling panel group, to rectification, makes permanent position water tank
The water surface is steady.
Described permanent position water tank is provided with delivery port with cell body junction, after the rectified plate of current after rectification, is delivered to groove
Body.
Cell body；
Described cell body section is rectangle, and the deck for laying weir plate is provided with certain position, and its correlation length should meet water
Mechanics related specifications, bottom of gullet are connected with the rubber tube of linker liquid level gauge, and arc delivery port is provided with the end of cell body,
Drained at box flowmeter downwards.
Described cowling panel group, cell body is located at close to permanent position water tank side, i.e. delivery port downstream, for coming to permanent position water tank
The rectification of water.
Described linker liquid level gauge, installed in cell body side wall, including be connected with the circular hole of cell body bottom rubber tube, use
Glass tube, water gauge in reading, it is spaced apart with cowling panel group, to measure the head height of current in tank.
Volumetric method water tank flowmeter；
Described volumetric method water tank flowmeter casing center is provided with the energy dissipating bucket of cylinder, is just offseted below sink outlet
Can bucket water inlet.
Described energy dissipating bottom of the barrel is provided with ball valve, and it can seal energy dissipating bottom of the barrel when closing, can when open for energy dissipating
Current are made to flow directly into pumping for water pump water tank.
It is provided with dividing plate group in described water tank flowmeter casing, three pieces of permeable dividing plates of level in the dividing plate group of bottom opening
Connected by a, width identical with the box height thin plate slightly narrower than dividing plate group, thin plate can be taken out.Respectively there is an aperture junction
For stretching out wire.Horizontal permeable baffle central respectively has a circular aperture to be used to place floating inductor, the phase of floating inductor
Position height can be adjusted.
Described floating inductor is connected by wire with automatic controller, floating inductor above and its deck
It can dismantle, to adjust inductor relative altitude, and then regulating tank flowmeter real work volume.
Described volumetric method water tank flowmeter, the water tank volume in institute's timing range are known fixed numerical value, it is necessary to carry
Preceding demarcation.
Described automatic controller, floating inductor from below start beginning timing of floating, and the floating to top senses
Device rises to stopping timing at dividing plate.Volume can be preset, it is directly automatic to calculate volume divided by time after timing stops, obtaining
Outflow.
Described pumping for water pump water tank is located at below box flowmeter, is placed under volumetric method water tank flowmeter delivery port
Side, side wall have apopore, are connected with water pump water inlet, the water of box flowmeter are passed through for access, and supply water for water pump.
Described water circulating pump water inlet is connected with pumping for water pump water tank, and delivery port is connected with permanent position water tank, for circulating
Supply water.
Compared with prior art, the invention has the advantages that：
The present invention is applied to the self-loopa open channel weir flow experimental provision of experimental teaching, ingenious applied fluid mechanics principle, solution
Problem is measured during the high-precision real of Cassia canal weir notch experimental provision low discharge：
The box flowmeter of volumetric method that this experimental provision is configured, solve volumetric standard water-level fluctuation by energy dissipating bucket and ask
Topic.Water is reduced after tank outflow by energy dissipating bucket, its impulsive force, is slowly risen after the water outflow energy dissipating bucket returned up,
Liquid level is steady, so that inductor induction level is accurate.
The box flowmeter of volumetric method that this experimental provision is configured, the measurement of volume is converted into the measurement of liquid level,
And the change of liquid level is transmitted to floating inductor, and then realize the measurement of time.The method reduces flow measurement process
In be likely to occur time, the artificial measurement error of volume, save manpower needed for experiment, automaticity is high.
The box flowmeter casing that this experimental provision is configured can be according to actual conditions adjusting size using partial volume, side
Just it is durable.
The permanent position water tank that this experimental provision is configured, it is ingenious to apply overflow plate, water level can be made to be adjusted to arbitrary height at any time,
Return duct is set at the water outlet of water fender, realizes watering cycle.
The cowling panel group that this experimental provision is configured, ensure stable water outlet, shorten cell body length, save space.
The automatic controller that this experimental provision is configured, the time real-time flow data can will be converted into by calculating, digital display shows
Show, intuitive and convenient.
The design of this experimental provision perseverance position water tank overflow pipe, water pump water outlet water tank etc., ensure device water circulation, avoid testing
During add water.
This experimental provision space-consuming is less, and space availability ratio is higher.
Brief description of the drawings
Fig. 1 is the structural representation for the self-loopa open channel weir flow experimental provision that the present invention is applied to experimental teaching；
Fig. 2 is permanent position cisten mechanism schematic diagram in the present invention；
Fig. 3 is the box flowmeter schematic diagram of volumetric method in the present invention；
Fig. 4 is cell body (being free of permanent position water tank) structural representation in the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Reference picture 1, suitable for the self-loopa open channel weir flow experimental provision of experimental teaching, including：For ensureing water yield perseverance
Fixed permanent position water tank 1, the cowling panel group 2 for ensureing water outlet level stability, the linker liquid level gauge 3 for measuring liquid level, use
The pumping for water pump water tank 5 of volumetric method water tank flowmeter 4, guarantee device water circulation in measurement actual flow, control following for water outlet
Permanent position water tank overflow pipe 7, the pump power 8 of ring water pump 6, the permanent position water tank of connection and pumping for water pump water tank, cell body 9.
Reference picture 2, permanent position water tank, includes：Permanent position tank inlet pipe 11, overflow pipe installing port 12, overflow plate group 1314,
Cowling panel group 1516, delivery port 17.
Water pump draws water from water tank in experimentation, and the water of extraction enters permanent position water tank, permanent position from permanent position tank inlet pipe 11
Water in Water Tanks position constantly rises, and overflow occurs when water level exceedes overflow plate group height, and the water that overflow goes out is returned by overflow pipe
Flow in water pump water outlet water tank.Because overflow plate is highly constant, therefore permanent position Water in Water Tanks position is invariable, by adjusting overflow
Plate height can control the flow of permanent position water tank water outlet, and adjustable overflow plate group plays regulation flow at this.Permanent position water tank
After stable level, water flows out permanent position water tank by delivery port 17, into weir notch device, in order to control stable water outlet uniform, tank
Front end sets cowling panel group, and cowling panel group aperture is close by dredging, and guaranteed water level is steady, and current can be uniformly through weir plate.On weir
The bottom of gullet perforate of correct position before plate, is connected by rubber linking tube with glass tube, there is scale on glass tube, and fixed
Outside tank, when current pass through tank, water forms linker between tank and glass tube, can directly read tank reclaimed water
The height of position.
Reference picture 3, preferably, volumetric method water tank flowmeter refers to one kind using Application No. 201620273764.2
The structure design of flow measurement device based on volumetric method, includes：Certain volume water tank 25, for cutting down water impact pressure
Come ensure the stable energy dissipating bucket 26 of measurement process, be used to placing the permeable square column of floating inductor inside water tank, for timing and
The automatic automatic controller 32 for calculating flow, the floating inductor 30 for controlling timing beginning and end, connected floating inductor and
The wire of autotimer, the ball valve 28 installed in energy dissipating bottom of the barrel, it is used to installed in water tank bottom to empty the ball valve 29 of casing.
Box volume is fixed between two floating inductors above and below water tank flowmeter, there is two floating sensings in permeable square column
Device.Energy dissipating bucket ball valve, which is opened, when testing interval ensures package unit water circulation.When experiment starts, energy dissipating bucket ball valve is closed, water tires out
The cylindrical part that product fills centre is spilt into water tank, and water level steadily rises in casing, lower section floating inductor induction level
Signal is passed into automatic controller afterwards, automatic controller starts to clock.Water level continues to rise, until top floating inductor sense
Liquid level should be arrived and signal is passed into automatic controller, automatic controller timing stops.Automatic controller is automatically according to setting
Program the volume of input and time are divided by obtain to the flow that casing is flowed into this period of time.Every time case is opened after experiment
Bottom ball valve discharges water.
Reference picture 4, cell body, includes：Cowling panel group 18 19 20, the rubber tube 21 being connected with the circular hole of cell body bottom,
For the glass tube 22 of reading, water gauge 23, the deck 24 for laying weir plate.
Water, via cowling panel group, flows downstream to sink outlet after the delivery port outflow of permanent position water tank.Laying weir notch
Deck on insert weir plate, you can start to test.By law of connected vessels, from glass tube and water gauge can read liquid level.
The course of work of the present invention is as follows：Water pump 6 draws water from pumping for water pump water tank 5, and current enter permanent position water tank 1, permanent position
Water in Water Tanks position rises, and overflow occurs when water level exceedes overflow plate, the water that overflow goes out is back to pumping for water pump water through pipeline 7
5 in case, permanent position Water in Water Tanks position is kept constant, can highly control water flow by adjusting overflow plate.Water flows through apopore
Into after the rectified plate group 2 of weir notch device, water flow stationary, current flow to the box flowmeter 4 of volumetric method after weir plate.Box flow
Current enter flowmeter casing when gauge energy dissipating bucket bottom valve is closed, and water level rises triggering inductor, Dose times in case.Weir notch wall
On linker liquid level gauge 3 can directly read head height.After box flowmeter completes flow measurement, casing bottom valve, water are opened
Pumping for water pump water tank is flowed at bottom valve, realizes water circulation.
Beneficial effects of the present invention；
The box flowmeter of a set of volumetric method that apparatus of the present invention include, the stopwatch and graduated cylinder used instead of laboratory measurement of discharge
Method, reduce artificial card table, artificial water receiving, the error of artificial reading.Principle based on volumetric method, measurement process are removed and artificially opened
Open shutoff valve to be carried out automatically by instrument completely outdoors, human factor influence can be eliminated, strengthen flow measurement accuracy, and do not account for
Used how unnecessary space, save device overall space.
Apparatus of the present invention add permanent position water tank in weir notch device water pump to tank watering place, and the water level in permanent position water tank is certain
When, the flow that the aperture of permanent position water tank bottom flows to tank is exactly definite value, it is ensured that water level no longer fluctuates in the sink, reduces
The unstability directly to be supplied water from water pump to tank.
Apparatus of the present invention set adjustable overflow plate group, and permanent position water can be controlled to adjust by controlling the height of overflow plate
Height of water level in case, and the water flow of water tank can be controlled by controlling the height of permanent position Water in Water Tanks position, in overflow
When the height of plate is certain value, the flow of the water of permanent position water tank supply screw clamp is exactly fixed value.
Apparatus of the present invention set up cowling panel group after permanent position water tank aperture water exit position, play a part of rectification, through experiment
Checking is found, after multiple rectification, the basic smooth flow of the position water surface on tank at a certain distance from aperture.
Suitable position adds linker liquid level gauge to apparatus of the present invention before weir plate in the sink, facilitates the reading of height of water level
Take.
Claims (16)
- A kind of 1. self-loopa open channel weir flow experimental provision suitable for experimental teaching, it is characterised in that including：The permanent position water tank (1) constant for ensureing water yield, cowling panel group (2), measure the linker liquid level gauge of liquid level (3), for measuring the volumetric method water tank flowmeter (4) of actual flow, the pumping for water pump water tank (5) of device water circulation, control are ensured The water circulating pump (6) of water is made, connects the permanent position water tank overflow pipe (7) of permanent position water tank and pumping for water pump water tank, pump power (8), tank (9).
- 2. a kind of volumetric method open channel weir notch experimental provision as claimed in claim 1, it is characterised in that described to be used to ensure Constant permanent position water tank (1) bottom of water is provided with the water inlet pipe (11) being connected with pumping line (10), controls permanent position Water in Water Tank The delivery port (12) of the overflow pipe of position height；Overflow plate group (13) and (14) are provided with inside described permanent position water tank (1)；Described permanent position water tank (1) is provided with cowling panel group (15) and (16)；Described permanent position water tank (1) is provided with the delivery port (17) to be supplied water to tank.
- 3. the water inlet pipe being connected as claimed in claim 2 with pumping line, it is characterised in that pumped out in bottom half and water Water pipe is connected, and the section tubular wall more than casing is provided with some uniformly water outlet circular holes.
- 4. the overflow plate group of height can be adjusted as claimed in claim 2, it is characterised in that can exist with slidable adjustment overflow plate A range of height, and a certain position can be fixed on.
- 5. cowling panel group (2) as claimed in claim 1, it is characterised in that whole including the different cowling panel of polylith pore size There is certain distance between flowing plate, aperture is gradually reduced along water (flow) direction, plays rectified action.
- 6. linker liquid level gauge (3) as claimed in claim 1, it is characterised in that including what is be connected with the circular hole of cell body bottom Rubber tube (21), the glass tube (22) for reading, water gauge (23).
- 7. the volumetric method water tank flowmeter (4) as claimed in claim 1 for being used to measure actual flow, it is characterised in thatRectangular box (25) is divided into three spaces by the dividing plate group (27) of energy dissipating bucket (26), bottom opening, positioned at rectangle case The energy dissipating bottom of the barrel in body center has the ball valve (28) of control water outlet, and rectangular box bottom sets water drain ball valve (29), bottom to open Mouthful dividing plate group be internally provided with two floating inductors respectively positioned at bottom dividing plate bottom deck (30) and second piece every On the bottom deck (31) of plate, the automatic controller (32) that is connected with two pieces of decks.
- 8. the volumetric method water tank flowmeter as claimed in claim 7 for being used to measure actual flow, it is characterised in that rectangle case Body center is provided with the energy dissipating bucket of cylinder, cell body delivery port lower section face energy dissipating bucket water inlet.
- 9. the volumetric method water tank flowmeter as claimed in claim 7 for being used to measure actual flow, it is characterised in that energy dissipating bucket bottom Portion is provided with ball valve, and it can seal energy dissipating bottom of the barrel when closing, and make tank water outlet energy dissipating.
- 10. the volumetric method water tank flowmeter as claimed in claim 7 for being used to measure actual flow, it is characterised in thatThree pieces of permeable dividing plates of level in the dividing plate group of bottom opening are slightly narrower than dividing plate group by a, width identical with box height Thin plate connection, thin plate can take out.Junction respectively has an aperture to be used to stretch out wire.Horizontal permeable baffle central respectively has a circle Shape aperture is used to place floating inductor, and the relative position height of floating inductor can be adjusted.
- 11. the volumetric method water tank flowmeter as claimed in claim 7 for being used to measure actual flow, it is characterised in that positioned at upper The floating inductor and its deck of side can be dismantled, and to adjust inductor relative altitude, and then regulating tank flowmeter is actual Working volume.
- 12. the volumetric method water tank flowmeter as claimed in claim 7 for being used to measure actual flow, it is characterised in that automatic meter When device floating inductor from below start to float and start timing, the floating inductor to top, which rises to, stops meter at dividing plate When.
- 13. the volumetric method water tank flowmeter as claimed in claim 7 for being used to measure actual flow, it is characterised in that counted When in the range of water tank volume be known fixed numerical value, it is necessary to demarcate in advance, when timing stops, automatic controller calculates automatically Flow number.
- 14. ensure the pumping for water pump water tank (5) of device water circulation as claimed in claim 1, it is characterised in that be placed on volume Below method water tank flowmeter delivery port, side wall has apopore, is connected with water pump water inlet.
- 15. the water circulating pump (6) of control water outlet as claimed in claim 1, it is characterised in that its water inlet and pumping for water pump water Case is connected, and its delivery port is connected with permanent position water tank overflow pipe.
- 16. tank (9) as claimed in claim 1, it is characterised in that the deck (24) for laying weir plate is provided with certain position, A few place's openings of bottom of gullet are connected with the rubber tube of linker liquid level gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610330350.3A CN107393374A (en) | 2016-05-14 | 2016-05-14 | Suitable for the self-loopa open channel weir flow experimental provision of experimental teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610330350.3A CN107393374A (en) | 2016-05-14 | 2016-05-14 | Suitable for the self-loopa open channel weir flow experimental provision of experimental teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107393374A true CN107393374A (en) | 2017-11-24 |
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ID=60338166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610330350.3A Pending CN107393374A (en) | 2016-05-14 | 2016-05-14 | Suitable for the self-loopa open channel weir flow experimental provision of experimental teaching |
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| Country | Link |
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| CN (1) | CN107393374A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679697A (en) * | 2020-06-12 | 2020-09-18 | 深圳职业技术学院 | Liquid level control device |
| CN112996354A (en) * | 2021-02-08 | 2021-06-18 | 哈尔滨工业大学 | Control method for simulated electric load heat dissipation water circulation system |
| CN113029513A (en) * | 2021-02-10 | 2021-06-25 | 中国地质大学（武汉） | Device and method for simulating generation of constant open channel flow |
| CN113309182A (en) * | 2021-06-04 | 2021-08-27 | 中国农业大学 | Blade energy dissipation type stable liquid level adjustable water tank for pipeline transient flow |
-
2016
- 2016-05-14 CN CN201610330350.3A patent/CN107393374A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679697A (en) * | 2020-06-12 | 2020-09-18 | 深圳职业技术学院 | Liquid level control device |
| CN112996354A (en) * | 2021-02-08 | 2021-06-18 | 哈尔滨工业大学 | Control method for simulated electric load heat dissipation water circulation system |
| CN113029513A (en) * | 2021-02-10 | 2021-06-25 | 中国地质大学（武汉） | Device and method for simulating generation of constant open channel flow |
| CN113029513B (en) * | 2021-02-10 | 2022-04-15 | 中国地质大学（武汉） | Device and method for simulating generation of constant open channel flow |
| CN113309182A (en) * | 2021-06-04 | 2021-08-27 | 中国农业大学 | Blade energy dissipation type stable liquid level adjustable water tank for pipeline transient flow |
| CN113309182B (en) * | 2021-06-04 | 2022-06-28 | 中国农业大学 | Blade energy dissipation type stable liquid level adjustable water tank for pipeline transient flow |
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Application publication date: 20171124 |
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