CN104778880B - Double-orifice-plate pressure stabilization and electrically-controlled colored water supply type Reynolds experiment instrument and method thereof - Google Patents
Double-orifice-plate pressure stabilization and electrically-controlled colored water supply type Reynolds experiment instrument and method thereof Download PDFInfo
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- 230000006641 stabilisation Effects 0.000 title abstract description 18
- 238000011105 stabilization Methods 0.000 title abstract description 18
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- 230000000994 depressogenic effect Effects 0.000 claims description 3
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- 230000035939 shock Effects 0.000 claims description 3
- 206010016807 Fluid retention Diseases 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000008676 import Effects 0.000 claims 1
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- 230000001105 regulatory effect Effects 0.000 abstract 1
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- 238000013459 approach Methods 0.000 description 7
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Abstract
The invention discloses a double-orifice-plate pressure stabilization and electrically-controlled colored water supply type Reynolds experiment instrument and a method thereof. The Reynolds experiment instrument comprises an electrically-controlled colored water supply device, a double-orifice-plate pressure stabilization water supply box, a transparent experiment pipe, a self-circulating water supply device, a flow regulating valve, a water return pipe and a control circuit. The pressure stabilization performance of the double-orifice-plate pressure stabilization water supply box is much higher than that of a traditional single-pressure-stabilization-plate water supply box, and a half of stabilization time can be shortened; the double-orifice-plate pressure stabilization water supply box has functions of ventilation, dredging and removal of accumulated water in a syringe and can thoroughly solve the problem. The Reynolds experiment instrument is also provided with a novel electric water storage and supply device which pumps up and pressurizes with an air pump to supply water upwards and relieves air and pressure to return water, and colored water is stored and changed freely. Trials indicate that the instrument can improve the experiment efficiency and the demonstration effect, has a very good innovation enlightening effect on students and is very popular among the students and teachers.
Description
Technical field
The present invention relates to hydrodynamics hydraulics teaching and experiment equipment.More particularly to a kind of coloured water power of spectacle plate voltage regulation type
Control supply type reynolds test instrument.
Background technology
Reynolds experiment is traditional in hydrodynamics hydraulics classical one of must test.
Reynolds experiment requires observing tube fluid layer stream and turbulent flow fluidised form, measures lower critical Reynolds number.
The observation of fluidised form is in the duct plus storage colored water shows as traced fluid.The amount of added colored water, with people
Drop reserves of the door when saline tuck is beaten are suitable.When under laminar flow conditions, the mutually not blending of the fluid particle in pipeline, without any confusion
Make orderly stratification flowing.Therefore, from pipeline opening store up into colored water can form straight line shape flow forward in the duct；When
Under turbulent flow condition, unordered random motion is made in the mutual blending of fluid particle in pipe.Therefore, store up into colored water water stock break completely
It is broken, diffuse to full pipe quickly as smog.The experiment effect of this experiment depends entirely on the feeder and its valve of colored water
Adjusting function.On traditional experiment, colored water is directly supplied water by high-order water box and flexible pipe and valve gravity flow, coloured due to its
The output of water is small, and required water supply hose is the tubule of a diameter about 1-2 millimeters, and colored water injection needle diameter nearly 0.7 is in the least
Rice or so, for the valve of open and close colored water, traditionally commonly uses the manual modulation valve of saline tuck, and this valve is will be soft
Pipe extruding is closed, and is unclamped and is opened.Its problem for existing, 1, it is long-term close after, flexible pipe follows the string, often opening failure；2、
Connection flexible pipe and its colored water injection needle are easy to be blocked by bubble or little particle, are trapped in after especially testing coloured in pipe
Water can not be excluded, and needle tubing is often scrapped after being dried, and to the maintenance of experiment instrument difficulty is caused；3rd, in this experiment, having during laminar flow
Color water consumption require it is less, readily satisfy, but under turbulent flow condition, because the flow rate of water flow of pipe flow it is larger, it is desirable to colored water is dense
Degree strengthens, and could show and allow student to see the diffusion chaotic Phenomena of smoke-like.Traditional method, when the elevation of coloured water box is fixed
Afterwards, the supply of colored water is improved in experiment, strengthening the concentration of colored water cannot realize, deep or light difficult tune.4th, old-fashioned Reynolds reality
Test and water storage case is fixed on instrument supply tank be only sufficient to 1 ~ 2 experiment, and the colored water that can disappear allotted of chemical agent is difficult long-term preservation,
Colored water not Evacuable is accomplished by within several days in periodic replacement, but fixed water storage case, and long storage time easily produces precipitation, pollutes
Water storage case or pipeline, cleaning is inconvenient, is also not easy to change coloured water liquid.
Actual measurement lower critical Reynolds number is to need the collection of illustrative plates of colored water in observing tube to be that turbulent flow or laminar flow could be determined.When
It was observed that current from turbulent flow be just changed into laminar flow when, the Reynolds number for being determined is lower critical Reynolds number.Its experimental precision both with
The display effect of colored water is relevant, and relevant with the stability of constant pressure water tank.Stability of the reynolds experiment to pressure-stabilizing water supply case
Can require very high, it is desirable to which the stabilization time of turbulent flow to laminar flow is more short better.Here need first to be described " stabilization time ".Herein
Described stabilization time all determines following example method：Under the experimental state of the normal overflow of supply tank, valve is opened to Reynolds number
For 2200 or so flow aperture, then keep valve opening constant, switch off the pump, in water tank of voltage regulation to be evacuated after water body, then
Water pump is opened, when pressurizer tank water tank overflow again, starts timing, now the fluid in pipeline is affected by the turbulent fluctuation of steady water tank,
Particle is disorderly and unsystematic, and colored water spreads as smoke-like, and disappears quickly, forms water in the pipe produced because water tank water body is unstable
Body turbulent flow fluidised form, because at this moment pipe flow Reynolds number is in lower critical below 2320, as long as the stability of water tank is good, the rapids in pipe
After flowing through certain hour stably, laminar flow can be automatically changeb to, in laminar condition, colored water can form straight line shape in pipe
Nowed forming.With stopwatch meter lower this period, stabilization time as mentioned herein.This stabilization time and set Reynolds
Number is relevant, the actual measurement marginal value that traditional experiment instrument to be reached typically only 2000 to 2100 or so, if it is left to be set in 2200
It is right, then stabilization time is long again, will not also be changed into laminar flow, here it is the result of steady water tank stability difference, so in Reynolds
In experiment, the voltage stabilizing requirement of steady water tank is very high.
Traditional experimental apparatus stability most preferably single orifice plate pressurizer tank.During this its Reynolds number 2200 of pressurizer tank
Stabilization time about needs ten minutes or so.Sometimes maximum critical Reynolds number can only be surveyed to 2100 or so, with ancestor's Reynolds
2320 critical Reynolds numbers for measuring have larger gap, although Reynolds survey the critical condition be in basement first static three days,
Allow water body in water tank it is highly stable it is lower just carry out, but in education experiment, teachers and students are intended to can be in the limited education experiment time
In, the critical Reynolds number closest to 2300 is measured with most fast stabilization time.So solving the steady of reynolds experiment pressure-stabilizing water supply case
Qualitative energy, is one of reynolds experiment technological difficulties.
The content of the invention
It is an object of the invention to provide a kind of stabilization time is short, stability is high, and colored water display effect is good, easy to operate
Efficient reynolds test instrument, the especially a kind of automatically controlled supply type reynolds test instrument of spectacle plate voltage regulation type colored water and its method.
Technical scheme is as follows：
A kind of automatically controlled supply type reynolds test instrument of spectacle plate voltage regulation type colored water has：The automatically controlled feeder of colored water, diplopore
Board-like pressure-stabilizing water supply case, transparent experiment tube, self-circulating water feeder, flow control valve, return pipe and control circuit, diplopore is board-like steady
The lower sides of pressure supply tank are provided with outlet and are connected with transparent experiment tube, and transparent experiment tube is provided with flow control valve, transparent reality
Test pipe to export just to funnel, funnel is connected by return pipe with self-circulating water feeder, self-circulating water feeder and the board-like voltage stabilizing of diplopore
Supply tank is connected by a water inlet pipe and an overflow outlet pipe, the pin hole of the colored water injection needle of the automatically controlled feeder of colored water
It is fixed on the axis of the water inlet that transparent experiment tube is communicated with the board-like pressure-stabilizing water supply case of diplopore.
The automatically controlled feeder of described colored water has colored water water storage case, trachea, automatically controlled three-way air valve, air pump, valve, has
It is color water filler and closure, siphon, colored water outlet pipe, the first automatically controlled two breather valve, colored water injection needle, second electric
Control two breather valve, the 3rd automatically controlled two breather valve, electronic water accumulating and supplying bottle and colored water suction hose；
Be provided with valve and colored water filler and closure at the top of colored water water storage case, valve by trachea with it is automatically controlled
Three-way air valve is connected, and automatically controlled three-way air valve is connected by trachea with air pump, in siphon insertion colored water water storage case, siphon dew
The part for going out colored water water storage case is provided with valve and water nozzle, and valve is located above or below water nozzle, siphonal valve with it is automatically controlled
Two breather valve are connected, and siphonal water nozzle is connected by colored water outlet pipe with colored water injection needle, colored water water storage case bottom
The water nozzle being connected with colored water suction hose is provided with, colored water suction hose is stretched in electronic water accumulating and supplying bottle, air pump is electric by second
Control two breather valve to be connected with electronic water accumulating and supplying bottle.One end of 3rd automatically controlled two breather valve is supplied by trachea with electronic water-retention
Water bottle is connected.Wherein colored water filler also can not set with closure.
The board-like pressure-stabilizing water supply case of described diplopore is provided with overflow plate between feed pipe and outlet pipe, feed pipe with it is transparent
Voltage stabilizing spectacle plate, shock insulation plate, voltage stabilizing spectacle plate are sequentially provided between the water inlet of experiment tube.
Described control circuit includes the first controlling switch, the second controlling switch, self-resetting switch composition.First control is opened
Close one end to be connected with positive source, the other end is connected respectively with the positive pole of automatically controlled three-way air valve, air pump, automatically controlled three-way air valve, gas
Pump negative pole is connected with power cathode, and second controlling switch one end is connected with positive source, the other end and the first automatically controlled two breather valve
Positive pole be connected, the first automatically controlled two breather valve negative pole is connected with power cathode, and self-resetting switch one end is connected with positive source,
The other end is connected respectively with air pump, the second automatically controlled two breather valve, the 3rd automatically controlled two breather valve positive pole, all electrical equipment negative poles with electricity
Source negative pole is connected.Self-resetting switch can also be using two or more by logical or close by disconnecting.
The Examination on experimental operation of the automatically controlled supply type reynolds test instrument of the spectacle plate voltage regulation type colored water is：
1）Main power is opened, self-resetting switch is pressed, the second automatically controlled two breather valve conducting, the 3rd automatically controlled two breather valve are closed
Close, until filling up required colored water water consumption, unclamp self-resetting switch；
Then pump switch is opened, standard-sized sheet self-circulating water feeder treats the board-like pressure-stabilizing water supply case overflow of diplopore, and experiment head is steady
It is fixed；
2）Open colored water siphon injection
When the first controlling switch is pressed, air pump and automatically controlled three-way air valve are while energization, colored water water storage case and air
Path is cut off by automatically controlled three-way air valve, and air pump is supplied into box, and air pressure is improved in box, and the colored water liquid level in siphon is carried therewith
Height, the air on pipe top is discharged via colored water outlet pipe, colored water injection needle, until colored water is full of siphon pipe top and has
Color water outlet pipe, forms siphon jet, treats the 3-5 seconds, and colored water goes out after stream to unclamp the first controlling switch again from colored water injection needle, sees
Examine the colored water fluidised form in pipe;
3）The deep or light regulation of colored water and Reynolds number measurement experimental implementation
The deep or light i.e. water supply flow size of colored water by automatically controlled realization, under the siphon injection state of colored water proper flow,
The first controlling switch is pressed, air pump is communicated with ozzle, aerating in box, while water storage case is closed, air pressure is improved, coloured discharge
Increase, increases coloured water concentration in experimental channel, if desired for the first controlling switch can be depressed multiple times, increases coloured water concentration
Plus, display effect is apparent.
During Reynolds number measurement experimental implementation, multiple slowly closing flow control valve observes colored water fluidised form, treats close laminar flow
During phenomenon, often adjust a valve, all need to stablize 1-2 minutes, once colored water formed one it is stable linear when, survey its thunder
Promise number, just obtains lower critical Reynolds number；
4）Close colored water siphon injection
At the end of needing to close coloured water injection or experiment, the second controlling switch is pressed, the first automatically controlled two breather valve is opened,
Automatically controlled two breather valve of valve Jing first and big gas phase under the normal siphon injection state of colored water, at the top of colored water water storage case
Logical, air is in open passive state in water storage case, and negative pressure is presented in box in the siphon of water level above section, when with siphon
When the normally closed first automatically controlled two breather valve that top is connected is powered, the first automatically controlled two breather valve is open-minded, under atmospheric pressure effect, air-flow
Automatically controlled two breather valve of Jing first flows into siphon top, and vacuum is destroyed, and siphon cutout, i.e., coloured water supply is closed.
5）Water storage case adds water and water discharge method
Water feeding method：Electronic water accumulating and supplying bottle, is a hermetic container, presses self-resetting switch left side, and now, air pump is opened
Dynamic, the second automatically controlled two breather valve is opened, and the 3rd automatically controlled two breather valve, automatically controlled three-way air valve are in normally off, air-flow
Into electronic water accumulating and supplying bottle, air pressure is improved in bottle, and water flows through colored water suction hose and is transported to colored water under hyperbar effect
In water storage case;
Water discharge method：When colored water needs to exclude in experiment end or water storage case, press on the right side of self-resetting switch, the 3rd
Automatically controlled two breather valve is opened, and gas is communicated with air in electronic water accumulating and supplying bottle, and air pressure is eliminated, high-order colored water water storage case
Middle water body just flow back in the electronic water accumulating and supplying bottle of low level automatically, completes the process of coloured Water Sproading and emptying water storage case.
6）The dredging method of colored water outlet pipe and colored water injection needle
After colored water high-level water storage box emptying hydrops, pin the first controlling switch, now because of whole air-channel system in, only
There is colored water injection needle to communicate with air, water injection box gases at high pressure can only be discharged by communicating pipe and injection needle,
Then the delay water body in pin, pipe is drained, while realizing dredging function.
7）Experiment end operation
Treat the above-mentioned 5th）Step colored water drain operation is complete, and the after 6) dredging of step injection pipeline is clean, and switch off the pump switch, pass
Main power is closed, that is, terminates reynolds experiment overall process.
The invention has the advantages that：
1st, short there is provided a kind of stabilization time, stability is high, good, the easy to operate efficient Reynolds reality of colored water display effect
Test instrument.
2nd, spectacle plate pressure-stabilizing water supply case, simple structure, voltage regulation result is good, confession of its voltage regulation performance than traditional monostable pressing plate
Water tank stability is significantly improved, and stabilization time can reduce half.
3rd, instant invention overcomes the easily stifled hardly possible that traditional colored water micro valve regulates and controls is dredged, operates the series of defect such as inconvenience to ask
Topic.For example, connect flexible pipe and its colored water injection needle is easy to be blocked by bubble or little particle, be trapped in after especially testing
Colored water can not be excluded in pipe, and needle tubing is often scrapped after being dried.The present invention has dredging colored water outlet pipe and coloured water injection
The function of pin, and be electric-controlled type, it is easy to operate.
4th, colored water is deep or light automatically controlled adjustable, easy to operate.
5th, increasing has electronic water accumulating and supplying bottle, can save the experiment colored water of abundance, can provide multigroup student repeatedly real
Test and use；Supply water upwards with being inflated to pressurize with air pump, the novel electric water accumulating and supplying device of deflation release backwater, automatically controlled supply
Colored water and recovery all easily, maintain the clean of colored water high-level water storage box, without hard cleaning.Also, colored water stores
Water water supply bottle is changed freely, easy to clean.
6th, used as hydrodynamic calculations instruments used for education, the fluid mechanics principle that make use of of novelty solves experiment hardly possible to the present invention
Topic, can inspire the creativity consciousness of student, beneficial to cultivating innovation ability, possess good teaching efficiency.
Description of the drawings
A kind of automatically controlled supply type reynolds test instrument structure of spectacle plate voltage regulation type colored waters of Fig. 1 and self-loopa schematic diagram；
The automatically controlled feeder structures of Fig. 2 and gas circuit connection diagram；
Fig. 3 control circuit schematic diagrams；
In figure, the automatically controlled feeder 1 of colored water, pressure-stabilizing water supply case 2, overflow plate 3, shock insulation plate 4, voltage stabilizing spectacle plate 5 has
Color water injection pin 6, transparent experiment tube 7, self-circulating water feeder 8, flow control valve 9, return pipe 10, colored water high-level water storage box
11, trachea 12, automatically controlled three-way air valve 13, air pump 14, valve 15, colored water adds storage mouth and closure 16, siphon 17 to have
Color water outlet pipe 18, the first automatically controlled two breather valve 19, colored water injection needle 20, the second automatically controlled two breather valve the 21, the 3rd is automatically controlled
Two breather valve 22, electronic water accumulating and supplying bottle 23, colored water suction hose 24, the first controlling switch 25, the second controlling switch 26, from
Reset switch 27, overflow outlet pipe 28, water inlet pipe 29.
Specific embodiment
The present invention is described further below in conjunction with the accompanying drawings, as shown in Figure 1-Figure 3, the present invention is divided into three parts： 1、
Automatically controlled feeder colored water water storage system and operational approach；2nd, the coloured water supply system of automatically controlled feeder and operational approach；3rd, it is real
Test operating system and its operational approach.
1. automatically controlled feeder colored water water storage system and operational approach
The system includes the second automatically controlled two breather valve 21, the 3rd automatically controlled two breather valve 22, electronic water accumulating and supplying bottle 23, has
Color water suction hose 24, the bottom of colored water water storage case 11 is provided with the water nozzle being connected with colored water suction hose 24, colored water suction hose 24
In stretching into electronic water accumulating and supplying bottle 23, air pump 14 is connected by the second automatically controlled two breather valve 21 with colored water suction hose 24, and the 3rd
Automatically controlled two breather valve 22 is connected on the trachea of the second automatically controlled two breather valve 21 and colored water suction hose 24
Water feeding method：Electronic water accumulating and supplying bottle 23, is a hermetic container, and interior storage colored water, this colored water is that one kind has
The special-purpose colored water of the Reynolds that self-loopa can be used for of colour killing function.Water supply bottle 23 is placed on the table.When colored water water storage case 11
When need to add colored water, the left side of self-resetting switch 27 is pressed, now, air pump starts, and the second automatically controlled two breather valve 21 is opened, and
3rd automatically controlled two breather valve 22, automatically controlled three-way air valve 13 is in normally off.Air-flow enters electronic water accumulating and supplying bottle 23, bottle
Interior air pressure is improved, and water flows through colored water suction hose 24 and is transported in color water water storage case 11.This button is decontroled after liquid feeding, button is automatic
Reset, now the second automatically controlled two breather valve 21 is closed, air pressure keeps constant in air-tight bottle, and the liquid in water storage case will not flow back；
Water discharge method：When colored water needs to exclude in experiment end or water storage case, the right side of self-resetting switch 27 is pressed, the
Three automatically controlled two breather valve 22 are opened, and gas is communicated with air in electronic water accumulating and supplying bottle 23, and air pressure is eliminated, high-order coloured
Water body just flow back in the electronic water accumulating and supplying bottle 23 of low level automatically in water water storage case 11, completes removal process.
2. the coloured water supply system of automatically controlled feeder and operational approach
1）, part and connection
The automatically controlled feeder 1 of described colored water has colored water water storage case 11, trachea 12, automatically controlled three-way air valve 13, air pump
14th, valve 15, colored water filler and closure 16, siphon 17, colored water outlet pipe 18, the first automatically controlled two breather valve 19,
Colored water injection needle 20, the second automatically controlled two breather valve 21, the 3rd automatically controlled two breather valve 22, electronic water accumulating and supplying bottle 23 and coloured
Water suction hose 24；
The top of colored water water storage case 11 is provided with valve 15 and colored water filler and closure 16, and valve 15 passes through gas
Pipe 12 is connected with automatically controlled three-way air valve 13, and automatically controlled three-way air valve 13 is connected by trachea 12 with air pump 14, and siphon 17 is inserted with
In color water water storage case 11, siphon 17 exposes the part of colored water water storage case 11 and is provided with valve and water nozzle, and valve is located on water nozzle
Side or lower section, the valve of siphon 17 is connected with automatically controlled two breather valve 19, and the water nozzle of siphon 17 passes through colored water outlet pipe 18
It is connected with colored water injection needle 20.
Colored water water storage case is arranged on higher position, and its position height should make minimum level in box be consistently higher than Reynolds reality
The highest liquid level of instrument supply tank is tested, while its height installed should be also made in coloured water energy gravity flow injection experimentses pipeline.
The common port of automatically controlled three-way air valve 13 is connected with valve 15 with trachea, normal-closed end is connected with air pump, threeway it is normally opened
The logical air in end.In the case of no power, common port leads to air to automatically controlled three-way air valve 13, and common port is communicated with air pump during energization, and
With big flow of QI being obstructed.Ozzle at the top of siphon is connected with normally closed automatically controlled two breather valve 19, the automatically controlled other end of two breather valve 19
Logical air.Automatically controlled two breather valve 19 is closed in the case of no power, open-minded during energization.By another ozzle on siphon top, with note
Penetrate pin 20 to be connected.Its siphonal bottom opening, top sealing.
2）Circuit system
Control circuit includes the first controlling switch 25, and the second controlling switch 26, self-resetting switch 27 is constituted.Self-resetting switch
Be a kind of two groups of single press-button type third gear by pass is opened up, its middle two-way is common port, presses right side then common port and right side two-way
Communicate, by a left side, then common port is communicated with left side two-way, is then switched during release and is automatically reset, left and right two-way is with common port not
Communicate.
The one end of first controlling switch 25 is connected with positive source, the other end respectively with automatically controlled three-way air valve 13, air pump 14
Positive pole is connected, and automatically controlled three-way air valve 13, the negative pole of air pump 14 are connected with power cathode, the one end of the second controlling switch 26 and positive source
It is connected, the positive pole of the other end two breather valve 19 automatically controlled with first is connected, the first automatically controlled negative pole of two breather valve 19 and power cathode
Be connected, the one end of self-resetting switch 27 is connected with positive source, the other end respectively with air pump 14, the second automatically controlled two breather valve 21, the
The three automatically controlled positive poles of two breather valve 22 are connected, and all electrical equipment negative poles are connected with power cathode.
3rd, the automatically controlled supply type reynolds test instrument total system of spectacle plate voltage regulation type colored water and operational approach
A kind of automatically controlled supply type reynolds test instrument of spectacle plate voltage regulation type colored water has：The automatically controlled feeder 1, diplopore of colored water
Board-like pressure-stabilizing water supply case 2, transparent experiment tube 7, self-circulating water feeder 8, flow control valve 9, return pipe 10 and control circuit, diplopore
The lower sides of board-like pressure-stabilizing water supply case 2 are provided with outlet and are connected with transparent experiment tube 7, and transparent experiment tube 7 is provided with Flow-rate adjustment
Valve 9, transparent experiment tube 7 is exported just to funnel, and funnel is connected by return pipe 10 with self-circulating water feeder 8, self-circulating water feeder 8
It is connected by a water inlet pipe and an overflow outlet pipe with the board-like pressure-stabilizing water supply case 2 of diplopore, the automatically controlled feeder 1 of colored water has
The pin hole of color water injection pin 20 is fixed on the axis of the water inlet that transparent experiment tube 7 is communicated with the board-like pressure-stabilizing water supply case 2 of diplopore
On.
The automatically controlled supply type reynolds test instrument total system of the spectacle plate voltage regulation type colored water and operational approach：
1）Main power is opened, self-resetting switch 27 is pressed, the second automatically controlled two breather valve 21 is turned on, the 3rd automatically controlled two ventilation
Valve 22 is closed, and until filling up required colored water water consumption, unclamps self-resetting switch 27,
Then pump switch is opened, standard-sized sheet self-circulating water feeder 8 treats the board-like pressure-stabilizing water supply case overflow of diplopore, tests head
It is stable；
2）Open colored water siphon injection
When the first controlling switch 25 is pressed, air pump and automatically controlled three-way air valve are powered simultaneously, colored water water storage case 11 with it is big
The path of gas is cut off by automatically controlled three-way air valve, and air pump is supplied into box, in box air pressure improve, the colored water liquid level in siphon with
Raising, the air on pipe top discharges via colored water outlet pipe 18, colored water injection needle 20, until colored water is full of siphon
Pipe top and colored water outlet pipe 18, form siphon jet, treat the 3-5 seconds, and colored water goes out after stream to unclamp the again from colored water injection needle 20
One controlling switch 25, the colored water fluidised form in observing tube,
3）The deep or light regulation of colored water and Reynolds number measuring and operating method
The deep or light i.e. water supply flow size of colored water by automatically controlled realization, under the siphon injection state of colored water proper flow,
The first controlling switch 25 is pressed, air pump is communicated with ozzle 15, aerating in box, while water storage case is closed, air pressure is improved, colored water
Flow increases, and increases coloured water concentration in experimental channel, if desired for the first controlling switch 25 can be depressed multiple times, makes colored water dense
Degree increases, and display effect is apparent,
Repeatedly slowly closing flow control valve 9 observes colored water fluidised form, when close laminar flow phenomenon, often adjusts a valve
Door, all needs to stablize 1-2 minutes, once colored water formed one it is stable linear when, survey its Reynolds number, just obtain lower critical thunder
Promise number；
4）Close colored water siphon injection
At the end of needing to close colored water or experiment, the second controlling switch 26 is pressed, the first automatically controlled two breather valve 19 is opened
Open, under the normal siphon injection state of colored water, first automatically controlled two breather valve 19 of Jing of valve 15 at the top of colored water water storage case 11
Communicate with air, air is in open passive state in water storage case, negative pressure is presented in box in the siphon of water level above section, when
When the normally closed first automatically controlled two breather valve being connected with siphon top is powered, the first automatically controlled two breather valve is open-minded, makees in atmospheric pressure
With under, automatically controlled two breather valve of air-flow Jing first flows into siphon top, and vacuum is destroyed, siphon cutout, i.e., coloured water supply
Close.
5）Water storage case adds water and water discharge method
Water feeding method：Electronic water accumulating and supplying bottle 23, is a hermetic container, presses the left side of self-resetting switch 27, now, air pump
Start, the second automatically controlled two breather valve 21 is opened, and the 3rd automatically controlled two breather valve 22, automatically controlled three-way air valve 13 is in normally closed shape
State.Air-flow enters electronic water accumulating and supplying bottle 23, and air pressure is improved in bottle, and to flow through colored water suction hose 24 defeated for water under hyperbar effect
In being sent to colored water water storage case 11.This button is decontroled after liquid feeding, button automatically resets, now the second automatically controlled two breather valve 21 is closed
Close, air pressure keeps constant in air-tight bottle, add the liquid in water storage case 11 not flow back.
Water discharge method：When colored water needs to exclude in experiment end or water storage case, the right side of self-resetting switch 27 is pressed, the
Three automatically controlled two breather valve 22 are opened, and gas is communicated with air in electronic water accumulating and supplying bottle 23, and air pressure is eliminated, high-order colored water
Water body just flow back in the electronic water accumulating and supplying bottle 23 of low level automatically in water storage case 11, completes coloured Water Sproading and emptying water storage case
Process.
6）The dredging method of colored water outlet pipe 18 and colored water injection needle 20
After the emptying hydrops of colored water high-level water storage box 11, the first controlling switch 25 is pinned, now because of whole air-channel system
In, only colored water injection needle 20 can be communicated with air, and water injection box gases at high pressure can only be by communicating pipe 18 and injection needle
20 discharge, and then the delay water body in pin, pipe is drained, while realizing dredging function.
7）Experiment end operation
Treat the above-mentioned 5th）Step colored water drain operation is complete, and after the injection pipeline dredging of the 6th step is clean, switch off the pump switch, closes
Main power is closed, that is, terminates reynolds experiment overall process.
Claims (4)
1. the automatically controlled supply type reynolds test instrument of a kind of spectacle plate voltage regulation type colored water, it is characterised in that it has：Colored water is automatically controlled
The board-like pressure-stabilizing water supply case (2) of feeder (1), diplopore, transparent experiment tube（7）, self-circulating water feeder（8）, flow control valve（9）、
Return pipe（10）And control circuit, the lower sides of the board-like pressure-stabilizing water supply case (2) of diplopore are provided with outlet and transparent experiment tube（7）Phase
Even, transparent experiment tube（7）It is provided with flow control valve（9）, transparent experiment tube（7）Just to funnel, funnel passes through return pipe for outlet
（10）With self-circulating water feeder（8）It is connected, self-circulating water feeder（8）With the board-like pressure-stabilizing water supply case (2) of diplopore by a water inlet
Pipe（29）With an overflow outlet pipe（28）It is connected, the colored water injection needle of the automatically controlled feeder of colored water (1)（20）Pin hole position
It is placed in experiment tube import（6）Axis on；
The automatically controlled feeder of described colored water (1) is with colored water high-level water storage box (11), trachea (12), automatically controlled three-way air valve
(13), air pump (14), valve (15), colored water filler and closure (16), siphon (17), colored water outlet pipe (18),
First automatically controlled two breather valve (19), colored water injection needle（20）, the second automatically controlled two breather valve (21), the 3rd automatically controlled two breather valve
(22), electronic water accumulating and supplying bottle（23）With colored water suction hose（24）；
Valve (15) and colored water filler and closure (16), valve are provided with the top of colored water high-level water storage box (11)
(15) it is connected with automatically controlled three-way air valve (13) by trachea (12), automatically controlled three-way air valve (13) is by trachea (12) and air pump (14)
It is connected, in siphon (17) insertion colored water high-level water storage box (11), siphon (17) exposes colored water high-level water storage box (11)
Part be provided with valve and water nozzle, valve is located above or below water nozzle, the valve of siphon (17) and automatically controlled two breather valve
(19) it is connected, the water nozzle of siphon (17) is by colored water outlet pipe (18) and colored water injection needle（20）It is connected, colored water is high
Position water storage case (11) bottom is provided with and colored water suction hose（24）Connected water nozzle, colored water suction hose（24）Stretch into electronic water-retention
Water supply bottle（23）In, air pump (14) is by the second automatically controlled two breather valve (21) and electronic water accumulating and supplying bottle（23）It is connected；
One end of 3rd automatically controlled two breather valve (22) is by trachea and electronic water accumulating and supplying bottle（23）It is connected.
2. a kind of automatically controlled supply type reynolds test instrument of spectacle plate voltage regulation type colored water according to claim 1, its feature exists
In the described board-like pressure-stabilizing water supply case of diplopore（2）Overflow plate is provided between feed pipe and outlet pipe（3）, feed pipe with it is transparent
Experiment tube（7）Water inlet between be sequentially provided with voltage stabilizing spectacle plate（5）, shock insulation plate（4）, voltage stabilizing spectacle plate（5）.
3. a kind of automatically controlled supply type reynolds test instrument of spectacle plate voltage regulation type colored water according to claim 1, its feature exists
Include the first controlling switch in described control circuit（25）, the second controlling switch（26）, self-resetting switch（27）；
First controlling switch（25）One end is connected with positive source, the other end respectively with automatically controlled three-way air valve (13), air pump (14)
Positive pole be connected, automatically controlled three-way air valve (13), air pump (14) negative pole are connected with power cathode, the second controlling switch（26）One end with
Positive source is connected, and the positive pole of the other end two breather valve (19) automatically controlled with first is connected, and the first automatically controlled two breather valve (19) is born
Pole is connected with power cathode, self-resetting switch（27）One end is connected with positive source, the other end respectively with air pump (14), second electric
Control two breather valve (21), the 3rd automatically controlled two breather valve (22) positive pole to be connected, all electrical equipment negative poles are connected with power cathode.
4. a kind of Examination on experimental operation of reynolds test instrument as claimed in claim 1, it is characterised in that：
1）Main power is opened, self-resetting switch is pressed（27）, the second automatically controlled two breather valve (21) conducting, the 3rd automatically controlled two ventilation
Valve (22) is closed, and until filling up required colored water water consumption, unclamps self-resetting switch（27）；
Then pump switch, standard-sized sheet self-circulating water feeder are opened（8）, the board-like pressure-stabilizing water supply case overflow of diplopore is treated, experiment head is steady
It is fixed；
2）Open colored water siphon injection
When pressing the first controlling switch（25）When, air pump is powered simultaneously with automatically controlled three-way air valve, colored water high-level water storage box (11)
Cut off by automatically controlled three-way air valve with the path of air, air pump is supplied into box, air pressure is improved in box, the coloured aqueous in siphon
Position is improved therewith, and the air on pipe top is via colored water outlet pipe（18）, colored water injection needle（20）Discharge, until colored water fills
Full siphon pipe top and colored water outlet pipe（18）, siphon jet is formed, to treat the 3-5 seconds, colored water is from colored water injection needle（20）Go out
Unclamp the first controlling switch after stream again（25）, the colored water fluidised form in observing tube,
3）The deep or light regulation of colored water and Reynolds number measurement experimental implementation
The deep or light i.e. water supply flow size of colored water under the siphon injection state of colored water proper flow, is pressed by automatically controlled realization
First controlling switch（25）, air pump and valve（15）Communicate, aerating in box, while colored water high-level water storage box is closed, air pressure
Improve, coloured discharge increase increases coloured water concentration in experimental channel, and the first controlling switch is depressed multiple times（25）, made
Color water concentration increases, and display effect is apparent,
During Reynolds number measurement experimental implementation, multiple slowly closing flow control valve（9）Observation colored water fluidised form, treats that close laminar flow shows
As when, often adjust a valve, all need to stablize 1-2 minutes, once colored water formed one it is stable linear when, survey its Reynolds
Number, just obtains lower critical Reynolds number；
4）Close colored water siphon injection
At the end of needing to close coloured water injection or experiment, the second controlling switch is pressed（26）, the first automatically controlled two breather valve (19)
Open, under the normal siphon injection state of colored water, the valve at the top of colored water high-level water storage box (11)（15）Jing first is automatically controlled
Two breather valve (19) are communicated with air, and air is in open passive state in colored water high-level water storage box, and water level is with top in box
Negative pressure is presented in the siphon for dividing, when the be connected with siphon top normally closed first automatically controlled two breather valve is powered, first is automatically controlled
Two breather valve are open-minded, and under atmospheric pressure effect, automatically controlled two breather valve of air-flow Jing first flows into siphon top, and vacuum is destroyed,
Siphon stops, i.e., coloured water supply is closed;
5）Colored water high-level water storage box adds water and water discharge method
Water feeding method：Electronic water accumulating and supplying bottle (23) is a hermetic container, presses self-resetting switch (27) left side, now, air pump
Start, the second automatically controlled two breather valve (21) is opened, and the 3rd automatically controlled two breather valve (22), automatically controlled three-way air valve (13) is in
Normally off, air-flow enters electronic water accumulating and supplying bottle (23), and air pressure is improved in bottle, and water flows through colored water suction hose (24) and is transported to
In colored water high-level water storage box (11);
Water discharge method：When colored water needs to exclude in experiment end or colored water high-level water storage box, self-resetting switch is pressed
(27) right side, the 3rd automatically controlled two breather valve (22) is opened, and gas is communicated with air in electronic water accumulating and supplying bottle (23), air pressure quilt
Eliminate, water body just flow back in the electronic water accumulating and supplying bottle (23) of low level automatically in colored water high-level water storage box (11), has completed
The process of color Water Sproading and emptying colored water high-level water storage box;
6）The dredging method of colored water outlet pipe (18) and colored water injection needle (20)
After colored water high-level water storage box (11) emptying hydrops, the first controlling switch (25) is pinned, now because of whole air-channel system
In, only colored water injection needle (20) can be communicated with air, and water injection box gases at high pressure can only pass through coloured outlet pipe (18) and have
Color water injection pin (20) is discharged, and then the delay water body in pin, pipe is drained, while realizing dredging function；
7）Experiment end operation
Treat the above-mentioned 5th）Step colored water drain operation is complete, and the after 6) dredging of step injection pipeline is clean, and switch off the pump switch, closes always
Power supply, that is, terminate reynolds experiment overall process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510139028.8A CN104778880B (en) | 2015-03-27 | 2015-03-27 | Double-orifice-plate pressure stabilization and electrically-controlled colored water supply type Reynolds experiment instrument and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510139028.8A CN104778880B (en) | 2015-03-27 | 2015-03-27 | Double-orifice-plate pressure stabilization and electrically-controlled colored water supply type Reynolds experiment instrument and method thereof |
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| CN105469674A (en) * | 2015-12-29 | 2016-04-06 | 浙江大学 | Electric control supply device for adding solution and method thereof |
| CN107833516B (en) * | 2017-09-08 | 2024-03-15 | 营口巨成教学科技开发有限公司 | Medium supply system for puncture/intubation training and method for simulating aspiration medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3726025A (en) * | 1969-08-26 | 1973-04-10 | K Salem | Methods and apparatus for visually illustrating sound waves |
| CN1595473A (en) * | 2004-07-02 | 2005-03-16 | 浙江大学 | Self-circulating Reynolds experiment instrument with automatic color killing |
| CN201732497U (en) * | 2010-06-04 | 2011-02-02 | 西安理工大学 | Reynolds experimental apparatus |
| CN102044184A (en) * | 2010-12-29 | 2011-05-04 | 中国矿业大学 | Fluid flow curve observation experiment device |
| CN204557883U (en) * | 2015-03-27 | 2015-08-12 | 浙江大学 | The automatically controlled supply type reynolds test instrument of a kind of spectacle plate voltage regulation type colored water |
-
2015
- 2015-03-27 CN CN201510139028.8A patent/CN104778880B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3726025A (en) * | 1969-08-26 | 1973-04-10 | K Salem | Methods and apparatus for visually illustrating sound waves |
| CN1595473A (en) * | 2004-07-02 | 2005-03-16 | 浙江大学 | Self-circulating Reynolds experiment instrument with automatic color killing |
| CN201732497U (en) * | 2010-06-04 | 2011-02-02 | 西安理工大学 | Reynolds experimental apparatus |
| CN102044184A (en) * | 2010-12-29 | 2011-05-04 | 中国矿业大学 | Fluid flow curve observation experiment device |
| CN204557883U (en) * | 2015-03-27 | 2015-08-12 | 浙江大学 | The automatically controlled supply type reynolds test instrument of a kind of spectacle plate voltage regulation type colored water |
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