CN103776983A - Rock soil wetting-drying cyclic experiment apparatus - Google Patents
Rock soil wetting-drying cyclic experiment apparatus Download PDFInfo
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- CN103776983A CN103776983A CN201410039386.7A CN201410039386A CN103776983A CN 103776983 A CN103776983 A CN 103776983A CN 201410039386 A CN201410039386 A CN 201410039386A CN 103776983 A CN103776983 A CN 103776983A
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Abstract
The invention provides a rock soil wetting-drying cyclic experiment apparatus which comprises a shell, a control unit, a wetting-drying conversion device and a weighing unit, wherein the control unit, wetting-drying conversion device and weighing unit are arranged in the shell; the wetting-drying conversion device is provided with a humidifier and a drying unit; the humidifier, drying unit and weighing unit are respectively connected with the control unit through an analog-to-digital converter; the control unit is connected with a digital-to-analog converter; the digital-to-analog converter is connected with the humidifier, drying unit and weighing unit; the weighing unit is arranged below the wetting-drying conversion device; and the control unit is used for receiving a water quantity control signal of the wetting-drying conversion device and a mass signal of the weighing unit, performing wetting-drying judgment, and sending a control signal to the wetting-drying conversion device. The experiment apparatus and experiment method provided by the invention are specially used for wetting-drying cyclic experiments in geotechnical engineering to enhance the automation degree and precision of the experiment.
Description
Technical field
The present invention relates to a kind of ground drying and watering cycle experimental provision, belong to Geotechnical Engineering field.
Background technology
Still there is no at present the instrument for ground drying and watering cycle experiment specially, researcher is all to test by the method manually adding water and dry mostly, and amount of water and degree of drying are difficult to control.Drying and watering cycle experiment is divided into humidification experiment and drying experiment, and the humidification requirement of experiment water yield is accurate, and makes ground sample complete wetting; Drying experiment requires sample to meet the requirements of degree of drying.In traditional experiment process, due to the disappearance of instrumentation, in drying and watering cycle experiment, the multiple samples repeatedly humidification water yield are difficult to accomplish accurately, unify; In dry run, accurately whether judgement sample has reached required degree of drying, and the conversion of humidification and dry run, must realize by artificial.The result discreteness obtaining by traditional experiment device is large, only has by increasing experimental group number and reduces error, not only time-consuming but also require great effort, and increases experimental cost.
Summary of the invention
The invention provides a kind of experimental provision, specialty, for Geotechnical Engineering aspect drying and watering cycle experiment, improves laboratory automation degree and precision.
For solving above technical matters, the invention provides following technical scheme: a kind of ground drying and watering cycle experimental apparatus, described experimental apparatus comprises housing, control device, dry wet conversion equipment and weighing device, and control device, dry wet conversion equipment and weighing device are arranged in housing; Dry wet conversion equipment is provided with damping device and drying device, and damping device, drying device and weighing device are all connected controller by analog to digital converter, controller linking number weighted-voltage D/A converter, and digital to analog converter connects humidification, drying device and weighing device; The below of described dry wet conversion equipment is weighing device; Control device receives dry wet conversion equipment water yield control signal and weighing device quality signal, and does-wet judgement, sends control signal to dry wet conversion equipment.
Further; described damping device comprise reserve tank, water receiver, main flow meter, secondary flowmeter and with the matching used quantitative controller of secondary flowmeter and dropper; the below of described reserve tank connects main flow meter; main flow meter below connects water receiver; water receiver below auxiliary connection flowmeter, secondary flowmeter below connects quantitative controller; The equal connection mode analog-to-digital conversion apparatus of main flow meter and secondary flowmeter.
Further, described drying device comprises drying lamp, lampshade and base, and described drying lamp is fixed on lampshade inwall, and lampshade is fixed on base, is sample on base, and drying lamp is arranged on the side top of sample; The control device linking number digital-to-analog conversion apparatus of drying lamp, sends by the signal of control device, realizes the startup of drying device and carries out dry irradiation according to the setting of drying time.
Further, described weighing device is a weighing unit, and weighing unit top connects the base of drying device, and base is the uncovered container in a top, and bottom has boss, and boss embeds and is connected with the depression of weighing unit center; Base top excircle step place supports described lampshade.
Further, the below of described quantitative controller connects dropper, and dropper is just to sample.
Further, on described housing, be provided with web joint, web joint has two, is arranged on the two ends up and down of water receiver, for fixing water receiver.
Further, the water outlet of described water receiver is provided with porous plug.
The concrete steps of experimental technique are as follows:
(1) reserve tank is connected with water source by water inlet, unnecessary water is discharged instrument outside by overflow vent, and flowmeter, quantitative controller, drying lamp, weighing unit are connected with analog to digital converter and digital to analog converter respectively;
(2) before sample preparation, need to test and obtain sample initial water content by geotechnique
w 0, initial mass
m 0.
(3) by after instrument assembling, in control device by quality zero clearing;
(4) set the humidification water yield
v, as need be by sample humidification to water cut
w 1, need add water volume and be:
；
(5) set infiltrating time
t 1, amount of water extremely
vafter, quantitative controller valve-off, adds water and stops, and sample enters dry run after fully infiltrating;
(6) set the judgment value that enters humidification process by dry run
a, return to the mass value of control device by weighing device, dry ground mass value judges, realizes dry wet conversion, judgment value
aformula be:
(7) set cool time
t 2, after samples dried, need just can carry out humidification after cooling certain hour;
(8) set drying moistening cycle
n.
This ground drying and watering cycle experimental provision the present invention relates to, transfer the electric signal of weighing device, dry wet conversion equipment to digital signal by A/D analog to digital converter, pass to control device, control device receives signal judgement, and send instruction by D/A digital to analog converter to drying and watering cycle module, carry out humidification and dry and between conversion.Dry wet conversion equipment and weighing device composition one, standardization accessory, can combination in any between accessory, formation one covering device.Under the connection of porous plug, can realize multiple, many groups of carrying out of testing simultaneously.After humidification and dry run all complete, be a drying and watering cycle, when sample carries out repeatedly drying and watering cycle experiment, only need to repeat the action of a circulation.
accompanying drawing explanation
Fig. 1 is ground drying and watering cycle experimental provision structural drawing of the present invention;
Fig. 2 is that Fig. 1 I-I is to sectional view;
Fig. 3 is that Fig. 1 II-II is to sectional view;
Fig. 4 is that Fig. 1 III-III is to sectional view;
Fig. 5 is dry-wet conversion and control process flow diagram of experimental provision of the present invention;
Description of reference numerals:
1-control device; 2-analog-to-digital conversion device; 3-digital to analog converter; 4-reserve tank; 5-water inlet; 6-overflow vent; 7-main flow meter; 8-installing plate; 9-water receiver; The secondary flowmeter of 10-; 11-quantitative controller; 12-drying lamp; 13-dropper; 14-weighing unit; 15-sample; 16-base; 17-housing; 18-vent port; 19-lampshade; 20-porous plug.
Embodiment
As shown in Figure 1, damping device comprise reserve tank 4, water receiver 9, main flow meter 7, secondary flowmeter 10 and with the matching used quantitative controller 11 of secondary flowmeter 10 and dropper 13, the below of described reserve tank 4 connects main flow meter 7, main flow meter 7 belows connect water receiver 9, water receiver 9 below auxiliary connection flowmeters 10, secondary flowmeter 10 belows connect quantitative controller 11.
Wherein, reserve tank 4 is a large capacity tank, and top has water inlet, and water inlet connects water source; The side of reserve tank 4 tops, water inlet is provided with overflow vent, and for carrying out overflow in the interior dilutional hyponatremia situation of reserve tank 4, overflow vent generally connects receiving trap, in order to avoid the dilutional hyponatremia in reserve tank 4 flows out outside case.The Main Function of water receiver 9 is to form free-water level, reduces hydraulic pressure and flow velocity, realizes the water yield and accurately controls.Water receiver 9 is the container that a relative capacity is less, and water receiver 9 is connected and fixed on housing by installing plate 8.
Drying device comprises drying lamp 12, lampshade 19 and base 16, and described drying lamp 12 is fixed on lampshade 19 inwalls, and lampshade is fixed on base 16, is sample 15 on base, and drying lamp is arranged on the side top of sample 15.Wherein, lampshade side wall upper part is provided with vent port 18, and sample, under the irradiation of drying lamp, distributes a large amount of steam, and steam is discharged from vent port 18.
Weighing device is a weighing unit, and weighing unit 14 tops connect the base of drying device.
The below of quantitative controller connects dropper 13, dropper just to sample 15.
On housing 17, be provided with web joint, web joint has two, is arranged on the two ends up and down of fixing water receiver 9, for fixing water receiver 9.
The water outlet of water receiver 9 is provided with porous plug 20.
Weighing device mainly contains weighing unit 14 compositions such as grade.Weighing unit produces electric pressure signal and passes to A/D analog to digital converter 2; Base 16, for holding sample 15, is mutual coupling with weighing unit 14, dismountable.
Fig. 2-Fig. 4 is each position profile figure of Fig. 1.
Fig. 5 is dry-wet conversion and control process flow diagram of experimental provision, sample is positioned over weighing device top and is dried and weighs, control device judges according to weighing results and setting value A, if weighing results reaches setting value, control device sends humidification signal to damping device; If weighing results does not reach setting value A, control device sends signal to drying device, sample is dried after certain hour, then is weighed by weighing device, and control device judges according to weighing results, and above process circulates.
The present invention is specifically designed to ground drying and watering cycle experiment, compare experimental apparatus in the past, have the function of automatic humidification, automatic drying, humidification and dry conversion do not need manual adjustment, return to the signal of control device according to weighing device, humidification and dry conversion automatically.Humidification and dry run, soil sample is weighed in real time, and whether humidification reaches setting requirement with dry, and instrument is judged automatically.Experimental apparatus standardization, can arbitrarily be combined to form many covering devices, realizes multiple samples and tests simultaneously, and can accurately control.This instrument can be realized the robotization of experimentation, and experimental precision is high, and error is little.
Embodiment of the present invention does not form the restriction to the application's scope; every within the spirit and principle of the present invention design, any modification that one of skill in the art can make, be equal to and replace and within improvement etc. all should be included in protection scope of the present invention.
Claims (7)
1. a ground drying and watering cycle experimental apparatus, is characterized in that, described experimental apparatus comprises housing, control device, dry wet conversion equipment and weighing device, and control device, dry wet conversion equipment and weighing device are arranged in housing; Dry wet conversion equipment is provided with damping device and drying device, and damping device, drying device and weighing device are all connected controller by analog to digital converter, controller linking number weighted-voltage D/A converter, and digital to analog converter connects humidification, drying device and weighing device; The below of described dry wet conversion equipment is weighing device; Control device receives dry wet conversion equipment water yield control signal and weighing device quality signal, and does-wet judgement, sends dry wet control signal to dry wet conversion equipment.
2. ground drying and watering cycle experimental apparatus according to claim 1, it is characterized in that, described damping device comprise reserve tank, water receiver, main flow meter, secondary flowmeter and with the matching used quantitative controller of secondary flowmeter, porous plug and dropper, the below of described reserve tank connects main flow meter, main flow meter below connects water receiver, water receiver below auxiliary connection flowmeter, secondary flowmeter below connects quantitative controller.
3. ground drying and watering cycle experimental apparatus according to claim 1, is characterized in that, described drying device comprises drying lamp, lampshade and base, described drying lamp is fixed on lampshade inwall, lampshade is fixed on base, is sample on base, and drying lamp is arranged on the side top of sample.
4. ground drying and watering cycle experimental apparatus according to claim 1, is characterized in that, described weighing device is a weighing unit, and weighing unit top connects the base of drying device.
5. ground drying and watering cycle experimental apparatus according to claim 3, is characterized in that, the below of described quantitative controller connects dropper, and dropper is just to sample.
6. ground drying and watering cycle experimental apparatus according to claim 1, is characterized in that, on described housing, be provided with web joint, web joint has two, is arranged on the two ends up and down of fixing water receiver, for fixing water receiver.
7. ground drying and watering cycle experimental apparatus according to claim 1, is characterized in that, the water outlet of described water receiver is provided with porous plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410039386.7A CN103776983B (en) | 2014-01-27 | 2014-01-27 | Ground drying and watering cycle experimental provision |
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|---|---|---|---|
| CN201410039386.7A CN103776983B (en) | 2014-01-27 | 2014-01-27 | Ground drying and watering cycle experimental provision |
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| CN103776983A true CN103776983A (en) | 2014-05-07 |
| CN103776983B CN103776983B (en) | 2015-08-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108287128A (en) * | 2018-01-29 | 2018-07-17 | 中国科学院武汉岩土力学研究所 | A kind of ground drying and watering cycle permeability measurement systems and its method |
| WO2021000563A1 (en) * | 2019-07-01 | 2021-01-07 | 长沙矿冶研究院有限责任公司 | Parameter measuring device and method for polymetallic nodules |
| CN112903973A (en) * | 2021-03-03 | 2021-06-04 | 中国矿业大学 | Soil body dry-wet cycle effect simulation experiment instrument based on quality threshold control |
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| CN112903973A (en) * | 2021-03-03 | 2021-06-04 | 中国矿业大学 | Soil body dry-wet cycle effect simulation experiment instrument based on quality threshold control |
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| CN103776983B (en) | 2015-08-05 |
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