CN104778882B - The special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment and its method - Google Patents

The special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment and its method Download PDF

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CN104778882B
CN104778882B CN201510139034.3A CN201510139034A CN104778882B CN 104778882 B CN104778882 B CN 104778882B CN 201510139034 A CN201510139034 A CN 201510139034A CN 104778882 B CN104778882 B CN 104778882B
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water
valve
colored
automatically controlled
colored water
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CN104778882A (en
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毛欣炜
毛根海
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/06Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
    • G09B23/08Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
    • G09B23/12Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of liquids or gases

Abstract

The invention discloses the special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment and its method.With colored water water storage case, tracheae, automatically controlled three-way air valve, air pump, valve, colored water filler and closure, siphon pipe, colored water outlet pipe, automatically controlled two breather valve, colored water injection needle and control circuit;The electronic control function of open and close or enriching colored water can be completed under the manipulation of control circuit.Easy stifled difficult thin, deep or light difficult tune, operation inconvenience regulated and controled instant invention overcomes traditional colored water micro valve etc. is a defect problem, has especially been filled up in Automated condtrol type reynolds experiment system, the blank of the automatically controlled feeder of colored water.

Description

The special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment and its method
Technical field
The present invention relates to hydrodynamics hydraulics teaching and experiment equipment.More particularly to the special-purpose colored water siphon valve of reynolds experiment The automatically controlled feeder of type and its method.
Background technology
Reynolds experiment is traditional in hydrodynamics hydraulics classical one of must test.With answering for modern technologies With the exploitation of Automated condtrol type reynolds experiment system is also in progress.
Reynolds experiment requires observation tube fluid layer stream and turbulent flow fluidised form, measures critical Reynolds number.The fluidised form of observation tube stream be Colored water is filled in pipeline and is used as traced fluid.The flow condition of traced fluid is observed, to understand the flow characteristic of laminar flow and turbulent flow.Institute Plus the amount of colored water, it is suitable with dropped amount of people's door when beating salt solution tuck.When under laminar flow conditions, the fluid particle in pipeline is mutual Not blending, makees orderly stratification flowing without any confusion.Therefore, the colored water injected from pipeline opening can form one in the duct Linear flow forward;When under turbulent flow condition, unordered random motion is made in the mutual blending of fluid particle in pipe.Therefore, injection Colored water water stock is crushed completely, diffuses to full pipe quickly as smog.The experiment effect of this experiment depends entirely on colored water Feeder and its valve adjusting function.On traditional experiment, colored water is straight by high-order water box and the gravity flow of flexible pipe and valve Water supply is connect, because the output of its colored water is small, required water supply hose is the tubule of about 1-2 millimeters of a diameter, colored water Nearly 0.7 millimeter of injection needle diameter, for the valve of open and close colored water, traditionally commonly uses the manual regulation of salt solution tuck Valve, this valve is to close hose squeezing, unclamps and opens.The problem of it is present, 1, it is long-term close after, flexible pipe follows the string, Often opening failure;2nd, connection flexible pipe and its colored water injection needle are easy to be blocked by bubble or little particle, especially in fact Colored water in pipe is trapped in after testing to be excluded, and needle tubing is often scrapped after drying, and the maintenance to experiment instrument causes difficulty;3rd, at this In experiment, coloured water consumption during laminar flow requires smaller, readily satisfies, but under turbulent flow condition, because of the flow rate of water flow of pipe stream It is larger, it is desirable to coloured water concentration enhancing, the diffusion chaotic Phenomena that could be shown and allow student to see smoke-like.Conventional method, when After the elevation of coloured water box is fixed, the supply of colored water is improved in experiment, the concentration of enhancing colored water can not be realized, deep or light Hardly possible is adjusted.4th, in Automated condtrol type reynolds experiment system, original experimental provision can not realize that automation is automatically controlled, and in the market is looked for Less than the like product about the automatically controlled feeder of colored water.
In order to overcome the above not enough, while in order to solve the technical barrier in Automated condtrol type reynolds experiment system, it is special This automatically controlled feeder is invented.
The content of the invention
It is an object of the invention to provide a kind of special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment and its method, especially It is to solve the technical barrier in Automated condtrol type reynolds experiment system, fill up the deep or light controllable electricity of the field colored water Control the blank of feeder.
Technical scheme is as follows:
A kind of special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment has colored water water storage case, tracheae, automatically controlled three Breather valve, air pump, valve, colored water filler and closure, siphon pipe, colored water outlet pipe, automatically controlled two breather valve, colored water Injection needle and control circuit;
Be provided with valve and colored water filler and closure at the top of colored water water storage case, valve by tracheae with it is automatically controlled Three-way air valve is connected, and automatically controlled three-way air valve is connected by tracheae with air pump, in siphon pipe insertion colored water water storage case, siphon pipe dew Go out colored water water storage case part be provided with valve and water nozzle, valve be located at water nozzle above or below, the valve of siphon pipe with it is automatically controlled Two breather valves are connected, and the water nozzle of siphon pipe is connected by colored water outlet pipe with colored water injection needle.
Described control circuit is constituted by first by power-on switch, second by power-on switch, and first presses power-on switch one End is connected with positive source, and positive pole of the other end respectively with automatically controlled three-way air valve, air pump is connected, and automatically controlled three-way air valve, air pump are born Pole is connected with power cathode, and second is connected by power-on switch one end with positive source, the positive pole of the other end and automatically controlled two breather valve It is connected, automatically controlled two breather valves negative pole is connected with power cathode.
The special-purpose colored water power control supply method of reynolds experiment of the automatically controlled feeder is:
1)Open colored water siphon injecting method
When pressing first by pass is opened up, air pump is powered simultaneously with automatically controlled three-way air valve, colored water water storage case (1) and air Path cut off by automatically controlled three-way air valve, air pump is supplied into box, and air pressure is improved in box, and the colored water liquid level in siphon pipe is therewith Improve, the air on pipe top is discharged via colored water outlet pipe, colored water injection needle, until colored water full of siphon pipe tube top and Colored water outlet pipe, forms siphon jet, and first is unclamped again by opening up pass after colored water goes out stream from colored water injection needle;
2)The deep or light adjusting method of colored water
The deep or light i.e. water supply flow size of colored water is realized by automatically controlled, under the siphon injection state of colored water proper flow, First is pressed by pass is opened up, air pump is communicated with ozzle, aerating in box, while water storage case is closed, air pressure is improved, coloured water-carrying capacity Increase, increases coloured water concentration in experimental channel, the time pressed is longer, the coloured water concentration in pipeline is denseer;
3)Close colored water siphon injecting method
Under the normal siphon injection state of colored water, valve at the top of colored water water storage case (1) through automatically controlled three-way air valve with Air is communicated, and air is in open passive state in water storage case.In box water level above section siphon pipe in present negative pressure, when by When descending second by pass is opened up, automatically controlled two breather valve is opened.Under atmospheric pressure effect, air-flow flows into siphon pipe through automatically controlled two breather valve Top, vacuum is destroyed, and siphon pipe cutout, i.e., coloured water supply is closed.
4)Inject pipeline dredging method
After experiment terminates, second is pinned by the pass several seconds is opened up, treats that liquid level drop to colored water storage box in pressure-measuring pipe Unclamp, then press by the pass several seconds is opened up again when near interior liquid level, treat that pressure-measuring pipe liquid level rises to the valve or water at top Unclamped when near mouth.So it is repeated several times, you can exclude the colored water in communicating pipe and injection needle totally, due to the gas of air pump Pressure is up to more than 3 meter water columns, therefore this process is both drainage exhaust process, is the air pressure using air pump again to pipeline and needle tubing The process dredged.
The device provides a kind of special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment, especially solve automatic Change the technical barrier in control type reynolds experiment system, fill up the blank of the deep or light controllable automatically controlled feeder of the field colored water.
The invention has the advantages that:
1st, the device provides a kind of special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment, especially solve certainly Technical barrier in dynamicization control type reynolds experiment system, fills up the sky of the deep or light controllable automatically controlled feeder of the field colored water In vain.
2nd, easily stifled difficult thin, operation inconvenience regulated and controled instant invention overcomes traditional colored water with micro valve etc. is that a defect is asked Topic.For example, connection flexible pipe and its colored water injection needle are easy to, by bubble or little particle blocking, be trapped in after especially testing Colored water can not be excluded in pipe, and needle tubing is often scrapped after drying.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.
3rd, colored water is deep or light automatically controlled adjustable, easy to operate.
4th, the present invention is as hydrodynamic calculations instruments used for education, and innovative make use of fluid mechanics principle to solve experiment hardly possible Topic, the creativity consciousness for the student that can motivate students' interest in learning, inspire is beneficial to culture innovation ability, possesses good teaching Effect.
Brief description of the drawings
Fig. 1 is the part composition and connection diagram of the special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment,
Fig. 2 is the control circuit diagram of the present invention;
In figure, colored water water storage case 1, tracheae 2, automatically controlled three-way air valve 3, air pump 4, valve 5, colored water filler is with sealing Lid 6, siphon pipe 7, colored water outlet pipe 8, automatically controlled two breather valve 9, colored water injection needle 10, first presses power-on switch 11, second By power-on switch 12.
Embodiment
As illustrated in fig. 1 and 2, a kind of special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment has colored water water storage case 1st, tracheae 2, automatically controlled three-way air valve 3, air pump 4, valve 5, colored water filler and closure 6, siphon pipe 7, colored water outlet pipe 8th, automatically controlled two breather valve 9, colored water injection needle 10 and control circuit;
The top of colored water water storage case 1 is provided with valve 5 and colored water filler and closure 6, and valve 5 passes through tracheae 2 It is connected with automatically controlled three-way air valve 3, automatically controlled three-way air valve 3 is connected by tracheae 2 with air pump 4, the insertion colored water water storage case of siphon pipe 7 In 1, the part that siphon pipe 7 exposes colored water water storage case 1 is provided with valve and water nozzle, and valve is located above water nozzle, the gas of siphon pipe 7 Mouth is connected with automatically controlled two breather valve 9, and the water nozzle of siphon pipe 7 is connected by colored water outlet pipe 8 with colored water injection needle 10.
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 should also enable colored water flow automatically in injection experimentses pipeline.Added by colored water filler 6 Enter colored water, and use seal cap sealing.Threeway common port is connected with valve 5 with tracheae, normal-closed end is connected with air pump, threeway Normally opened end leads to air.Automatically controlled three-way air valve is in the case of no power, and common port leads to air, and common port is communicated with air pump during energization, And with big flow of QI being obstructed.Ozzle at the top of siphon pipe is connected with normally closed automatically controlled two breather valve, the automatically controlled two breather valves other end is logical big Gas.Automatically controlled two breather valve is closed in the case of no power, open-minded during energization.By another ozzle of siphon tube top, with injection needle 10 It is connected.The bottom opening of its siphon pipe, top sealing.
Described control circuit is constituted by first by power-on switch 11, second by power-on switch 12, and first is opened by energization Close 11 one end with positive source to be connected, positive pole of the other end respectively with automatically controlled three-way air valve 3, air pump 4 is connected, automatically controlled three-way air valve 3rd, the negative pole of air pump 4 is connected with power cathode, and second is connected by the one end of power-on switch 12 with positive source, the other end and automatically controlled two-way The positive pole of air valve 9 is connected, and the automatically controlled negative pole of two breather valve 9 is connected with power cathode.
The special-purpose colored water power control supply method of reynolds experiment of the automatically controlled feeder is:
1)Open colored water siphon injection
When pressing first by pass 11 is opened up, air pump is powered simultaneously with automatically controlled three-way air valve, colored water water storage case 1 and air Path cut off by automatically controlled three-way air valve, air pump is supplied into box, and air pressure is improved in box, and the colored water liquid level in siphon pipe is therewith Improve, the air on pipe top is discharged via colored water outlet pipe 8, colored water injection needle 10, until colored water is full of siphon pipe pipe Top and colored water outlet pipe 8, form siphon jet, and first is unclamped again by opening up pass after colored water goes out stream from colored water injection needle 10 11;
2)The deep or light regulation of colored water
The deep or light i.e. water supply flow size of colored water is realized by automatically controlled, under the siphon injection state of colored water proper flow, First is pressed by pass 11 is opened up, air pump is communicated with ozzle 5, 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, the time pressed is longer, the coloured water concentration in pipeline is denseer;One As when testing, as long as of short duration press button 11, the colored water filled is just enough to show the fluidised form of turbulent flow, and display effect Fruit is perfectly clear.
3)Close colored water siphon injection
Under the normal siphon injection state of colored water, the valve at the top of colored water water storage case (1)(5)Through automatically controlled three-way air valve (3)Communicated with air, air is in open passive state in water storage case.Presented in box in the siphon pipe of water level above section negative Pressure, when pressing second by opening up pass(12)When, automatically controlled two breather valve(9)Open.Under atmospheric pressure effect, air-flow is through automatically controlled two-way Air valve is flowed at the top of siphon pipe, and vacuum is destroyed, and siphon pipe cutout, i.e., coloured water supply is closed.
It, is referred to as " siphon valve " by this device that valve switch function is realized by siphon pipe principle herein.
4)Inject pipeline dredging method
After experiment terminates, second is pinned by opening up pass(12)Several seconds, treat that liquid level drop to colored water storage in pressure-measuring pipe Water box(1)Unclamp, then press by opening up pass again when near interior liquid level(11)Several seconds, treat that pressure-measuring pipe liquid level rises to top Valve or water nozzle near when unclamp.So it is repeated several times, you can by communicating pipe(8)And injection needle(10)In colored water exclude Totally, due to air pump air pressure up to 3 meter water columns more than, therefore this process is both drainage exhaust process, is to utilize air pump again The process dredged to pipeline and needle tubing of air pressure.

Claims (3)

1. a kind of special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment, it is characterised in that it has colored water water storage case (1), tracheae (2), automatically controlled three-way air valve (3), air pump (4), the first valve (5), colored water filler and closure (6), siphon Manage (7), colored water outlet pipe (8), automatically controlled two breather valve (9), colored water injection needle(10)And control circuit;
The first valve (5) and colored water filler and closure (6), the first valve are provided with the top of colored water water storage case (1) (5) it is connected by tracheae (2) with automatically controlled three-way air valve (3), automatically controlled three-way air valve (3) is connected by tracheae (2) with air pump (4), In siphon pipe (7) insertion colored water water storage case (1), the part that siphon pipe (7) exposes colored water water storage case (1) is provided with the second valve And water nozzle, the second valve is located above or below water nozzle, and the second valve of siphon pipe (7) is connected with automatically controlled two breather valve (9), The water nozzle of siphon pipe (7) passes through colored water outlet pipe (8) and colored water injection needle(10)It is connected.
2. the special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment according to claim 1, it is characterised in that described Control circuit be by first by power-on switch (11), second by power-on switch(12)Composition, first presses power-on switch (11) one End is connected with positive source, and positive pole of the other end respectively with automatically controlled three-way air valve (3), air pump (4) is connected, automatically controlled three-way air valve (3), air pump (4) negative pole is connected with power cathode, and second presses power-on switch(12)One end is connected with positive source, the other end and electricity The positive pole for controlling two breather valves (9) is connected, and automatically controlled two breather valve (9) negative pole is connected with power cathode.
3. a kind of reynolds experiment of the special-purpose colored automatically controlled feeder of water siphon valve-type of reynolds experiment as claimed in claim 2 is special to be had Color water power control supply method, it is characterised in that:
1)Open colored water siphon injecting method
When pressing first by power-on switch(11)When, air pump and automatically controlled three-way air valve are powered simultaneously, colored water water storage case (1) and greatly The path of gas is cut off by automatically controlled three-way air valve, and air pump is supplied into colored water water storage case, and air pressure is improved in box, having in siphon pipe Color aqueous position is improved therewith, and the air on siphon pipe top is via colored water outlet pipe(8), colored water injection needle(10)Discharge, directly Siphon pipe tube top and colored water outlet pipe are full of to colored water(8), siphon jet is formed, treats colored water from colored water injection needle(10) First is unclamped after outflow again by power-on switch(11);
2)The deep or light adjusting method of colored water
The deep or light i.e. water supply flow size of colored water is realized by automatically controlled, under the siphon injection state of colored water proper flow, is pressed First presses power-on switch(11), air pump and the first valve(5)Communicate, aerating in box, while water storage case is closed, air pressure is improved, Coloured water-carrying capacity increase, increases coloured water concentration in experimental channel, the time pressed is longer, the coloured water concentration in pipeline is got over It is dense;
3)Close colored water siphon injecting method
Under the normal siphon injection state of colored water, the first valve at the top of colored water water storage case (1)(5)Through automatically controlled three-way air valve (3)Communicated with air, air is in open passive state in water storage case;
Negative pressure is presented in box in the siphon pipe of water level above section, when pressing second by power-on switch(12)When, automatically controlled two ventilation Valve(9)Open;
Under atmospheric pressure effect, air-flow is flowed at the top of siphon pipe through automatically controlled two breather valve, and vacuum is destroyed, siphon pipe cutout, i.e., Coloured water supply is closed;
4)Inject pipeline dredging method
After experiment terminates, second is pinned by power-on switch(12)Several seconds, treat that liquid level drop to colored water water storage in siphon pipe Box(1)Unclamped again when near interior liquid level, then press first by power-on switch(11)Several seconds, treat that siphon pipe liquid level rises to Unclamped when near second valve or water nozzle at top;
So it is repeated several times, you can by colored water outlet pipe(8)And injection needle(10)In colored water exclude it is clean, due to air pump Air pressure up to 3 meter water columns more than, therefore this process is both drainage exhaust process, be again using the air pressure of air pump to pipeline and The process that needle tubing is dredged.
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