CN208860708U - A kind of varying head permeability experimental facility that accurately can quickly measure geotechnical sample infiltration coefficient - Google Patents
A kind of varying head permeability experimental facility that accurately can quickly measure geotechnical sample infiltration coefficient Download PDFInfo
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- CN208860708U CN208860708U CN201821447215.8U CN201821447215U CN208860708U CN 208860708 U CN208860708 U CN 208860708U CN 201821447215 U CN201821447215 U CN 201821447215U CN 208860708 U CN208860708 U CN 208860708U
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Abstract
A kind of varying head permeability experimental facility that accurately can quickly measure geotechnical sample infiltration coefficient, including for water vat, bucket, electromagnetical spiral machine, varying head pipe, permeability vessel, control box, host computer.Described to connect vacuum pump by drinking-water pipe for water vat, for being equipped with helical rotor in water vat, the helical rotor rotates under the magnetic fields that electromagnetical spiral machine generates；The first interface of the varying head pipe connection four-way connection, the second interface of four-way connection connects permeability vessel, the third interface of four-way connection connects control box by liquidometer, it controls box and connects host computer, 4th interface connecting line one of four-way connection, bucket connecting line two, the pipeline one, pipeline two summarize connection and are followed by for water vat.The utility model one kind accurately can quickly measure the varying head permeability experimental facility of geotechnical sample infiltration coefficient, not only largely exclude the bubble in distilled water；The error and security risk manually read can also be removed from, while experimental precision and working efficiency can be improved.
Description
Technical field
The utility model relates to Geotechnical Engineering fields, and in particular to one kind accurately can quickly measure geotechnical sample infiltration
The varying head permeability experimental facility of coefficient.
Background technique
The common falling head permeameter in centrifugal modeling room needs to prepare some more complex work before formal experiment, tests
Distilled water used need to be boiled in advance or is evacuated to exclude bubble, but discovery underwater bubble is difficult to exclude clean, bubble in an experiment
Not small influence is caused on experimental result, in order to improve distillation water quality, it may be necessary to secondary or repeatedly boil or be evacuated.If real
Completion water is tested there are also extra, takes away again again when recycling next time and boils or be evacuated, this is one.Second, testing
People station is needed aloft accurately to read the scale value on head pipe in specific time in the process, just not saying this manual operation people
The error of autoreactivity time, there are also the presence of error in reading and security risk, and the data point that reading obtains is less, precision
It is low.Third, in general, a sample can just obtain reliable infiltration coefficient after needing to carry out 5~6 permeability tests.This
Period is complicated for operation, and parameter is too many, spends the time long, and error is constantly accumulated, and largely influences experimental result, or even directly
Lead to the failure of experiment.Therefore, divination by means of the milfoil need to find a kind of device for solving above-mentioned drawback to promote quality of experiments and benefit.
Summary of the invention
Based on above several drawbacks, the utility model provides a kind of change that accurately can quickly measure geotechnical sample infiltration coefficient
Head permeability experimental provision can easily overcome above-mentioned shortcomings.The device utilizes sensor and electromagnetic equipment, in conjunction with single-chip microcontroller
The programming Control of data processing and host computer, the automatic operation of basic realization device.Not only largely exclude distillation
Bubble in water；The error and security risk manually read can also be removed from, while experimental precision and working efficiency can be improved.
The technical solution that the utility model is taken are as follows:
A kind of varying head permeability experimental facility that accurately can quickly measure geotechnical sample infiltration coefficient, including for water vat, water
Bucket, electromagnetical spiral machine, varying head pipe, permeability vessel, control box, host computer.
Described to connect vacuum pump by drinking-water pipe for water vat, for being equipped with helical rotor in water vat, the helical rotor is in electricity
It is rotated under the magnetic fields that magnetic screw machine generates；
The first interface of the varying head pipe connection four-way connection, the second interface connection permeability vessel of four-way connection, four
The third interface of pass joint connects control box by liquidometer, and control box connects host computer, the 4th interface connection of four-way connection
Pipeline one, bucket connecting line two, the pipeline one, pipeline two summarize connection and are followed by for water vat.
On the bracket for being placed in wall eminence for water vat, it is higher than varying head tube top end for water vat placement height, it is described
For bracket upper support for water vat, bracket lower suspension has plank, places an electromagnetical spiral machine on the plank.
The drinking-water pipe is equipped with three-way connection, and three-way connection first interface is connected by water pipe for water vat, three-way connection
Second interface connects deflation valve, and three-way connection third interface connects vacuum pump by evacuating valve.
The electromagnetical spiral machine connects control switch by control line, and the control switch is equipped with start button, transfers the files
Button.
The permeability vessel is equipped with exhaust water pipe, water outlet, and exhaust water pipe is equipped with tongs.
It is equipped with single-chip microcontroller in the control box, controls box by USB data line and connects host computer.
The pipeline one is equipped with the first valve, solenoid valve, the solenoid valve connection control box, and the pipeline two is equipped with
Water-pumping valve.
The second interface of the four-way connection is equipped with the second valve.
The utility model one kind accurately can quickly measure the varying head permeability experimental facility of geotechnical sample infiltration coefficient, technology
Effect is as follows:
1, from common falling head permeameter is different in the market or in laboratory, steaming used in common falling head permeameter
Distilled water typically contains bubble, it is difficult to clean, have not small influence to experiment, and extra distilled water is difficult to utilize again.This is practical new
The helical rotor rotation of type generates vortex and underwater bubble is strongly discharged, and is being taken bubble air etc. away together using vacuum pump, very
Experimental precision is improved in big degree.
2, for common falling head permeameter in reading, artificial reading has the reaction time and reading mistake equal error exists,
Reading is slow and the data point that obtains is again few, while personnel station is aloft dangerous, liquidometer to head height in varying head pipe certainly
Security risk is also discharged in dynamic measurement while improving accuracy of reading, and machine automatically records head height in the entire period and becomes
Change, data point is more and accurate.
3, ordinary circumstance, common falling head permeameter are all to be manually recorded in water in specific time in each experimentation
Head changing value, to calculate the infiltration coefficient of sample by calculator in conjunction with formula, how much is the infiltration coefficient being calculated in this way
There are errors.And invention directly runs the direct programmed of single-chip microcontroller on host computer, the infiltration coefficient of sample and its with
The change curve of time or head height is shown during the experiment already, fast and accurate.
4, the instruments such as electromagnetical spiral machine, liquidometer, solenoid valve used in the utility model are not rare, on the market or net
On be easy purchase, cost is not high, easy for installation, and effect is promoted obvious.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples:
Fig. 1 is the general structure schematic diagram of the utility model experimental provision.
Fig. 2 is the partial structural diagram one of the utility model experimental provision (for water vat part).
Fig. 3 is the partial structural diagram two (comprising drawing water, extraction gas, control switch) of the utility model experimental provision.
Fig. 4 is the partial structural diagram three (including four way valve, permeability vessel) of the utility model experimental provision.
In figure: water supply container 1, drinking-water pipe 2, control line 3, three-way connection 4, evacuating valve 5, control switch 6, start button
7, button 8 of transferring the files, vacuum pump 9, water container 10；
Deflation valve 11, Water-pumping valve 12, electromagnetical spiral machine 13, supporting plate 14, bracket 15, cord or iron wire 16 become water
Head tube 17, four-way connection 18, shelter-clad 19, solenoid valve 20；
Permeability vessel 21, exhaust water pipe 22, water outlet 23, tongs 24, liquidometer 25, single-chip microcontroller 26 control box 27,
USB data line 28, host computer 29, the first valve 30, the second valve 31.
Specific embodiment
As shown in Figure 1-Figure 3, a kind of varying head permeability experimental facility that accurately can quickly measure geotechnical sample infiltration coefficient,
Including water supply container 1, water container 10, electromagnetical spiral machine 13, varying head pipe 17, permeability vessel 21, control box 27, host computer
29。
The water supply container 1 connects vacuum pump 9 by drinking-water pipe 2, is equipped with helical rotor, the spiral in water supply container 1
Rotor rotates under the magnetic fields that electromagnetical spiral machine 13 generates.The water supply container 1 is that vacuum is saturated cylinder, organic glass material
Hole is arranged at matter, cylinder top, and to connect 2 upper port of drinking-water pipe, vacuum pump 9 is taken away air in cylinder by drinking-water pipe 2.
The drinking-water pipe 2 be equipped with three-way connection 4,4 first interface of three-way connection by water pipe connection water supply container 1, three
4 second interface of pass joint connects deflation valve 11, and 4 third interface of three-way connection connects vacuum pump 9 by evacuating valve 5.It is described
Evacuating valve 5 and 9 one Guan Liantong of vacuum pump close air door, open evacuating valve 5, starting vacuum pump 9 can be by water supply container
Air is taken away in 1, and air pressure reduces in water supply container 1, is conducive to draw water.
There is shelter-clad 19 at 11 port of deflation valve, when deflating, air pours in water supply container 1 and negative
Pressure, the dust that can effectively avoid in air enter in water supply container 1 with air, cause water pollution.
The varying head pipe 17 connects the first interface of four-way connection 18, and the second interface connection infiltration of four-way connection 18 is held
Device 21 can supply water for sample, and the third interface of four-way connection 18 is connected by liquidometer 25 controls box 27, in the control connection of box 27
Position machine 29, the 4th interface connecting line one of four-way connection 18,10 connecting line two of water container, the pipeline one, pipeline two
Summarize connection to be followed by water supply container 1.The pipeline one is equipped with the first valve 30, solenoid valve 20, and the solenoid valve 20 connects
Box 27 is controlled, the pipeline two is equipped with Water-pumping valve 12.Hole is arranged at 1 bottom of water supply container, to connect drinking-water pipe 2, takes out
Water source flows into water supply container 1 in water container 10 under penstock 12 is controllable.The Water-pumping valve 12 is opening occasion, closes
Solenoid valve 20 is closed, when vacuum pump 9 is normally evacuated, is extracted water source in water container 10 using negative pressure in water supply container 1
Into water supply container 1.Water container 10 uses wooden barrel.
The water supply container 1 is placed on the bracket 15 of wall eminence, and the placement height of water supply container 1 is higher than varying head pipe 17
Top, the 15 upper support water supply container 1 of bracket, 15 lower suspension of bracket have supporting plate 14, and supporting plate 14 uses plank.The support
An electromagnetical spiral machine 13 is placed on plate 14, which can just give birth to high-intensitive magnetic field in energization, and magnetic direction is not
It is disconnected to change, it is matched with the helical rotor.1 inner bottom surface of water supply container is placed with one piece of helical rotor, the rotor
Generally metal, size is smaller, and inclined slender type generates under high-strength magnetic fields, high speed rotation in electromagnetical spiral machine 13, supplies water
Water in container 1 generates vortex under the rotation of this rotor, conducive to the bubble discharge hidden in water body.The electromagnetical spiral machine 13
Control switch 6 is connected by control line 3, the control switch 6 is equipped with start button 7, button 8 of transferring the files.The permeability vessel
21 are equipped with exhaust water pipe 22, water outlet 23, and exhaust water pipe 22 is equipped with tongs 24.Single-chip microcontroller is equipped in the control box 27
26, control box 27 connects host computer 29 by USB data line 28.The single-chip microcontroller 26 is 51 single-chip microcontrollers, includes four 8 parallel-by-bits
I/O interface, 4KB ROM and 128BRAM.Host computer 29 is programmed using Labview, single by sending instruction control and management
Piece machine 26, single-chip microcontroller 26 manage the state of a control of the solenoid valve 20 of subordinate, liquidometer 25 again.
The host computer 29 is programmed using Labview, by sending instruction control and management single-chip microcontroller 26, single-chip microcontroller
26 manage the solenoid valve 20 of subordinate and the state of a control of liquidometer 25 again.
The second interface of the four-way connection 18 is equipped with the second valve 31.
The control switch 6 of the electromagnetical spiral machine 13 and pumping are deflated and three valves that draw water are placed in orientation under wall
It sets, facilitates control and regulation.
The liquidometer 25 is static pressure liquid level meter, is a kind of pressure sensor for measuring liquid level, is based on surveyed fluid pressure
The principle proportional to the height of the liquid, can degree of precision measure the total height of water column in varying head pipe 17.
When the water supply container 1 is 17 moisturizing of varying head pipe, liquidometer 25 jointly controls with solenoid valve 20, in host computer 29
Upper input head height value, water supply container 1 are 17 moisturizing of varying head pipe, 20 real-time control water flow size of solenoid valve, liquidometer
25 monitoring 17 head heights of varying head pipe variations, when head height is close to preset height, solenoid valve 20 controls water flow and reduces,
Until solenoid valve 20 is thoroughly closed when head just reaches preset height, stop moisturizing.
The varying head pipe 17 is placed on metope vertically, there is graduation mark above, is facilitated head reading and is examined.
It is a kind of can the method for rapid survey sample infiltration coefficient in advance need to firstly, fill distilled water to water container 10
The saturated sample for carrying out permeability test is carefully packed into permeability vessel 21, starting vacuum pump (9, evacuating valve 5 is opened,
Remaining valve is closed, in this way, vacuum pump 9 gradually extracts air in water supply container 1 out, after being evacuated a few minutes, only opens water pumping valve
Door 12, the distilled water in water container 10 enter in water supply container 1 by water pipe, carry out aqueous vapor with pumping；In addition, drawing water
Meanwhile the power supply line of the electromagnetical spiral machine 13 of 1 lower section of water supply container is connected, it presses above the control switch 6 of electromagnetical spiral machine 13
Start button 7, the helical rotor high speed rotation of 1 inner bottom of water supply container generates vortex, while on rotary control switch 6
It transfers the files knob 8, accelerates the revolving speed of helical rotor, underwater bubble is further discharged；It reach a certain height to water storage in water supply container 1
When, it stops pumping, closes Water-pumping valve 12, after for distillation water vapor bubbles exclude completely substantially in water vat, press start button 7,
Stop electromagnetical spiral machine 13 to work.After water body is stablized, evacuating valve 5 is first closed, the switch of vacuum pump 9 is then shut off, stopped
The work of vacuum pump 9.And then deflation valve 11 is opened, air, which enters, neutralizes its negative pressure, this process bubble in water supply container 1
Discharge is completed, and is carried out in next step.
Then, the first valve 30 on four way valve 18 is opened, solenoid valve 20 is closed, starts liquidometer 25, in host computer
It carries out " head height " on 29 human-computer interaction interface to preset, after clicking " supplement head " key, solenoid valve 20 is automatically opened, and supplies
Water source is gradually flowed into varying head pipe 17 in water container 1, while 25 real-time monitoring head height of liquidometer, to head close in advance
If after head height, solenoid valve 20 controls water supply flow and reduces, and head speedup is slack-off, detects head to liquidometer 25 and just reaches
When to default head height, solenoid valve 20 is thoroughly closed, blocks and supplies water, the bubble inspection supplied water followed by sample；Open the
Two valves 31, the water in varying head pipe 17 are flowed into permeability vessel 21, are then passed through container bottom and are overflowed from exhaust water pipe 22,
While overflowing water, generally wait overflow in water after basic bubble-free, exhaust water pipe can be tightly clamped with tongs 24 with bubble
22, it is ensured that water spilling is not had, is then shut off the second valve 31, is laid flat permeability vessel 21, consumption part head during this,
The interference of bubble is discharged.
And then it gives varying head pipe 17 moisturizing again, repeats last time step, the point on the human-computer interaction interface of host computer 29
" head height " key is hit, solenoid valve 20 controls water supply flow, and liquidometer 25 monitors head height, after the completion of moisturizing, formally
Start permeability test, open the second valve 31, head gradually decreases, and water slowly flows into the sample in permeability vessel 21, and observation is seeped
The water outlet 23 on saturating 21 top of container starts to click liquidometer 25 on operation 29 screen of host computer when water outlet 23 has water spilling
Button, head height changes with time in real-time monitoring varying head pipe 17, acquires data.
Acquisition and calculating to data are realized in the programming of host computer 29, and varying head infiltration coefficient theoretical formula is as follows, wherein a,
L can be measured in advance, t1、t2And H1、H2It is measured by experiment, thus calculates the infiltration coefficient of first time sample.
In formula: a-varying head pipe basal area (cm2)；
The conversion coefficient of 2.3-ln and log；
L-seepage paths, i.e. specimen height (cm)；
t1、t2- it is respectively to survey the starting for reading head and terminate time (s)；
H1、H2- starting and termination head.
It repeats aforesaid operations step 5~6 times, can obtain multiple infiltration coefficients, take its average value, as this sample is final
Infiltration coefficient.
Claims (8)
1. one kind accurately can quickly measure the varying head permeability experimental facility of geotechnical sample infiltration coefficient, including water supply container (1),
Water container (10), electromagnetical spiral machine (13), varying head pipe (17), permeability vessel (21), control box (27), host computer (29)；
It is characterized by: the water supply container (1), by drinking-water pipe (2) connection vacuum pump (9), water supply container (1) is interior to be turned equipped with spiral
Son, the helical rotor rotate under the magnetic fields that electromagnetical spiral machine (13) generates；
The second interface of the first interface of varying head pipe (17) connection four-way connection (18), four-way connection (18) connects infiltration
Container (21), the third interface of four-way connection (18) are controlled in box (27) connection by liquidometer (25) connection control box (27)
Position machine (29), the 4th interface connecting line one of four-way connection (18), water container (10) connecting line two, the pipeline one,
Pipeline two summarizes connection and is followed by water supply container (1).
2. a kind of varying head permeability test dress that accurately can quickly measure geotechnical sample infiltration coefficient according to claim 1
It sets, it is characterised in that: on water supply container (1) placement bracket (15), water supply container (1) placement height is higher than varying head pipe
(17) top, bracket (15) the upper support water supply container (1), bracket (15) lower suspension have supporting plate (14), the supporting plate
(14) an electromagnetical spiral machine (13) is placed on.
3. a kind of varying head permeability test dress that accurately can quickly measure geotechnical sample infiltration coefficient according to claim 1
It sets, it is characterised in that: the drinking-water pipe (2) is equipped with three-way connection (4), and three-way connection (4) first interface is connected by water pipe
Water supply container (1), three-way connection (4) second interface connect deflation valve (11), and three-way connection (4) third interface passes through extraction valve
Door (5) connection vacuum pump (9).
4. a kind of varying head permeability test dress that accurately can quickly measure geotechnical sample infiltration coefficient according to claim 1
It sets, it is characterised in that: the electromagnetical spiral machine (13) passes through control line (3) connection control switch (6), the control switch (6)
It is equipped with start button (7), button of transferring the files (8).
5. a kind of varying head permeability test dress that accurately can quickly measure geotechnical sample infiltration coefficient according to claim 1
It sets, it is characterised in that: the permeability vessel (21) is equipped with exhaust water pipe (22), water outlet (23), and exhaust water pipe (22) is equipped with
Tongs (24).
6. a kind of varying head permeability test dress that accurately can quickly measure geotechnical sample infiltration coefficient according to claim 1
It sets, it is characterised in that: be equipped with single-chip microcontroller (26) in the control box (27), control box (27) connection host computer (29).
7. a kind of varying head permeability test dress that accurately can quickly measure geotechnical sample infiltration coefficient according to claim 1
It sets, it is characterised in that: the pipeline one is equipped with the first valve (30), solenoid valve (20), solenoid valve (20) the connection control
Box (27), the pipeline two are equipped with Water-pumping valve (12).
8. a kind of varying head permeability test dress that accurately can quickly measure geotechnical sample infiltration coefficient according to claim 1
It sets, it is characterised in that: the second interface of the four-way connection (18) is equipped with the second valve (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821447215.8U CN208860708U (en) | 2018-09-04 | 2018-09-04 | A kind of varying head permeability experimental facility that accurately can quickly measure geotechnical sample infiltration coefficient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821447215.8U CN208860708U (en) | 2018-09-04 | 2018-09-04 | A kind of varying head permeability experimental facility that accurately can quickly measure geotechnical sample infiltration coefficient |
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| Publication Number | Publication Date |
|---|---|
| CN208860708U true CN208860708U (en) | 2019-05-14 |
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ID=66416775
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821447215.8U Expired - Fee Related CN208860708U (en) | 2018-09-04 | 2018-09-04 | A kind of varying head permeability experimental facility that accurately can quickly measure geotechnical sample infiltration coefficient |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208860708U (en) |
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2018
- 2018-09-04 CN CN201821447215.8U patent/CN208860708U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190514 Termination date: 20200904 |