CN204439487U - A kind of system utilizing centrifuge method to measure characteristic curve of soil moisture - Google Patents
A kind of system utilizing centrifuge method to measure characteristic curve of soil moisture Download PDFInfo
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- CN204439487U CN204439487U CN201520142787.5U CN201520142787U CN204439487U CN 204439487 U CN204439487 U CN 204439487U CN 201520142787 U CN201520142787 U CN 201520142787U CN 204439487 U CN204439487 U CN 204439487U
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Abstract
The utility model discloses a kind of system utilizing centrifuge method to measure characteristic curve of soil moisture, comprise hydro-extractor, centrifuge tube, Water collecting tube, magnetostriction chi, surge drum, baffle plate, wherein: hydro-extractor has rotating shaft, rotating disk and display screen; Have apopore bottom centrifuge tube, the pipe lid of centrifuge tube has measured hole; Water collecting tube comprises stack shell, the dividing plate that catchments, water check valve, waterproof vent valve, and the dividing plate that catchments is provided with screw thread inlet opening and screw thread bleeder vent, for collecting the water that pedotheque is discharged; Magnetostriction chi is arranged on the Guan Gaichu of centrifuge tube, for measuring the stroke of pedotheque; Surge drum is for ensureing the balance of hydro-extractor rotating disk.The utility model can calculate water content in soil sample according to pedotheque decrement and water discharge and revise, and the soil water potential corresponding to centrifugal rotational speed can measure the characteristic curve of pedotheque, result is more accurate, weigh and balancing again without the need to pouring out water after measuring at every turn simultaneously, save measuring process.
Description
Technical field
The utility model relates to a kind of measuring system of characteristic curve of soil moisture, especially a kind of system utilizing centrifuge method to measure characteristic curve of soil moisture.
Background technology
Characteristic curve of soil moisture is generally also called characteristic curve of soil moisture or soil pF curve, and it describes the relation between soil water potential and soil water content.The requisite important parameter of research Soil Moisture Dynamics character, significant in production practices.
The method that method directly measures characteristic curve of soil moisture is by experiment called direct method.Have numerous laboratories and field method in direct method, as tensiometer method, pressure membrane method, centrifuge method, sand core funnel method, balance vapor pressure method etc., and front 3 kinds of application are the most general:
Tensiometer method---be that soil absorbs moisture by potter's clay cup and causes certain vacuum tightness or suction from tensiometer, when soil and the external world reach balance, measure soil matrix gesture, measure the soil moisture content around potter's clay cup again, continuous change soil moisture content also surveys corresponding suction, just can complete the mensuration of characteristic curve of soil moisture.Tensiometer method can be used for dehydration and water suction 2 processes, can measure the characteristic curve of disturbed soil and undisturbed soil, be for the important means of monitor on field soil water dynamics, be used widely in real work.But tensiometer only can measure the characteristic curve of bargain-hunting power scope 0 ~ 0.08Mpa.
Pressure membrane method---be that pressurization makes soil moisture flow out, causing soil matrix potential drop low until matric potential and added pressure equilibrium, measure soil moisture content now. the water cut progressively obtained under different pressures by changing pressure can obtain water characteristic curve.Pressure membrane method can be applicable to disturbed soil and undisturbed soil, and the characteristic curve that the shape of mensuration characteristic curve is intrinsic with soil conforms to, and can be applicable to Dynamic Simulation on Soil Moisture, but determination period is long, there is the problem of soil weight change.
Centrifuge method---water cut corresponding under measuring certain suction, principle is similar with pressure membrane method with experimentation, but the centrifugal force that its source pressure produces in hydro-extractor High Rotation Speed.Centrifuge method can be applicable to disturbed soil and undisturbed soil, and determination period is short.The characteristic curve that the relative shape of characteristic curve is intrinsic with soil conforms to, and can be used for Dynamic Simulation on Soil Moisture.But hydro-extractor only can measure dehydration, and the soil weight alters a great deal in mensuration process, if can correct the impact of unit weight, is expected higher accuracy of measurement.More than the departure degree Primary Study of the water cut of the prediction that Shao Mingan (1985) tests from soil evaporation and actual measurement 3 kinds of methods measure difference and the accuracy of soil matrix gesture, and result shows to consider that the centrifuge method of changing bulk density has higher accuracy.
The measuring process of current centrifuge method is: after cutting ring sample earth, be soaked in water saturated, be then put in centrifuge tube, under different centrifugal force, survey soil moisture content.Its shortcoming is that will take out centrifuge tube after each rotating speed has turned weighs, pour out centrifugal go out water, then put into hydro-extractor after balancing, thus process is loaded down with trivial details, complicated; In the characteristic curve of soil moisture of centrifuge method survey simultaneously process, unit weight can change, larger impact can be produced to the precision of characteristic curve of soil moisture, therefore need in measuring process to measure soil weight change, thus utilize model to revise characteristic curve of soil moisture.
Utility model content
For solving above-mentioned the problems of the prior art, the utility model provides a kind of system utilizing centrifuge method to measure characteristic curve of soil moisture.
The technical solution adopted in the utility model is: a kind of system utilizing centrifuge method to measure characteristic curve of soil moisture, comprises hydro-extractor, centrifuge tube, Water collecting tube, magnetostriction chi, balance pipe, baffle plate, wherein:
Described hydro-extractor inside has rotating shaft and rotating disk, and described hydro-extractor outside has the operating display of setting and display parameter of noncentricity;
Described centrifuge tube is located on hydro-extractor rotating disk, comprise at the bottom of pipe shaft, Guan Gai and pipe, be structure as a whole at the bottom of wherein said pipe shaft and pipe, described pipe shaft is cylindrical structural, measured hole is provided with in the middle part of described pipe lid, be provided with apopore at the bottom of described pipe, described pipe shaft is inner is provided with near pipe bottom the filter plate matched with tube body diameter size, is provided with the pore interconnected at the bottom of described pipe shaft and pipe;
Described Water collecting tube is sleeved on bottom centrifuge tube, described Water collecting tube comprises stack shell, be located at dismountable dividing plate that catchments of stack shell inside, water check valve and waterproof vent valve, described dividing plate and the stack shell of catchmenting is combined to form closed hollow structure, the described dividing plate that catchments is provided with screw thread apopore, the water inlet end of described water check valve is threaded connection and is arranged on screw thread apopore, the water side of described water check valve is located in the hollow structure that catchment dividing plate and stack shell formed, the described dividing plate that catchments is provided with stepped appearance projection, described stepped appearance high spot is provided with threaded air vent, described waterproof vent valve to be located in hollow structure that catchment dividing plate and stack shell formed and to be threaded connection and is arranged on threaded air vent,
Described magnetostriction chi comprises stock, main body, position magnet, display instrument and wire, wherein said stock stretches into centrifuge tube inside by the measured hole in the middle part of the pipe lid of described centrifuge tube, the pipe lid that described main body is located at centrifuge tube is outside, described position magnet to be enclosed within stock and to be located in centrifuge tube, and described display instrument is located at hydro-extractor rotating shaft top and is connected main body by wire;
Establish round-meshed circular slab centered by described baffle plate, between on the stock that described baffle plate is installed on magnetostriction chi and at the bottom of position magnet and cylinder, the radius of described baffle plate is less than the internal diameter of centrifuge tube;
Described balance pipe is located on the rotating disk of hydro-extractor, and symmetrical centered by hydro-extractor rotating shaft relative to centrifuge tube.
Under the centrifugal action that High Rotation Speed produces, pedotheque contained humidity is through filter plate and flowed out by apopore, enter into the inside of Water collecting tube by catchment screw thread apopore on dividing plate and water check valve and collect again, air in Water collecting tube is discharged to outside centrifuge tube by waterproof vent valve and pore, and ensure that moisture can not leak out so that test result is forbidden.Simultaneously, pedotheque can produce compression under centrifugal action, the position magnet of baffle plate and magnetostriction chi along with pedotheque change in depth together with slide on stock, baffle plate then avoids position magnet and is absorbed in pedotheque and causes test result inaccurate.
Hinge structure, the beneficial effects of the utility model are:
1. the utility model adopts centrifugal force to provide pressure for pedotheque, the moisture of being discharged by pedotheque under certain rotating speed is imported in Water collecting tube collected by apopore, the dividing plate that catchments, water check valve, the water discharge under corresponding centrifugal force is calculated by poidometer, without the need to the moisture of discharging under each setting speed being outwelled and measuring, therefore only a balancing is needed, completely all to pour out moisture and balancing again without the need to measuring at every turn, dramatically reduce measuring process;
2. the utility model adopts water check valve to prevent aqueous reflux, ensure that the accuracy of measurement result;
3. the utility model by arranging filter plate in centrifuge tube, can effectively prevent mud particles from being spun off by apopore and blocking the flexible pipe that catchments;
4. the utility model directly can read the soil stroke under each setting speed by magnetostriction chi, thus calculate the unit weight of the pedotheque under each setting speed, and then the water cut of pedotheque is revised, make the water characteristic curve measured more accurate, and measuring process is simple to operation.
Accompanying drawing explanation
Fig. 1 is overall schematic of the present utility model.
Fig. 2 is the structural representation of centrifuge tube described in the utility model, Water collecting tube and magnetostriction chi.
In figure: 1-hydro-extractor, 11-rotating shaft, 12-rotating disk, 13-operating display, 2-centrifuge tube, 21-pipe shaft, 22-pipe lid, at the bottom of 23-pipe, 24-measured hole, 25-apopore, 26-filter plate, 27-pore, 3-Water collecting tube, 31-stack shell, 32-catchments dividing plate, 33-water check valve, 34-waterproof vent valve, 35-screw thread apopore, 36-threaded air vent, 4-magnetostriction chi, 41-stock, 42-main body, 43-position magnet, 44-display instrument, 45-wire, 5-balance pipe, 6-baffle plate, 7-cutting ring, 8-pedotheque.
Embodiment
By reference to the accompanying drawings and embodiment the technical solution of the utility model is further illustrated.
As shown in Figure 1 and Figure 2, the technical solution adopted in the utility model is: a kind of system utilizing centrifuge method to measure characteristic curve of soil moisture, comprises hydro-extractor 1, centrifuge tube 2, Water collecting tube 3, magnetostriction chi 4, balance pipe 5, baffle plate 6, wherein:
The inside of described hydro-extractor 1 is provided with rotating shaft 11 and rotating disk 12, and the outside of described hydro-extractor 1 is provided with and sets and show the operating display 13 of parameter of noncentricity;
As shown in Figure 2, described centrifuge tube 2 is located on hydro-extractor rotating disk 12, to comprise at the bottom of pipe shaft 21, pipe lid 22 and pipe 23, wherein said pipe shaft 21 with 23 to be structure as a whole at the bottom of pipe, described pipe shaft 21 is cylindrical structural, is provided with measured hole 24 in the middle part of described pipe lid 22, and at the bottom of described pipe, 23 are provided with apopore 25, described pipe shaft 21 inner at the bottom of pipe 23 places be provided with the filter plate 26 matched with pipe shaft 21 internal diameter size, at the bottom of described pipe shaft 21 and pipe, 23 are provided with the pore 27 interconnected; Described Water collecting tube 3 is sleeved on the bottom of centrifuge tube 2, described Water collecting tube bag 3 is drawn together stack shell 31, is located at dismountable dividing plate 32 that catchments of stack shell inside, water check valve 33 and waterproof vent valve 34, and the wherein said dividing plate 32 that catchments is combined to form closed hollow structure with stack shell 31; The described dividing plate 32 that catchments is provided with screw thread apopore 35, and the water inlet end of described water check valve 33 is threaded connection and is arranged on screw thread apopore 35, and the water side of described water check valve 33 is located in the hollow structure that catchment dividing plate 32 and stack shell 31 formed; The described dividing plate 32 that catchments is provided with stepped appearance projection, and described stepped appearance high spot is provided with threaded air vent 36, and it is interior and be threaded connection and be arranged on threaded air vent 36 that described waterproof vent valve 34 is located at hollow structure that catchment dividing plate 32 and stack shell 31 formed; Described magnetostriction chi 4 comprises stock 41, main body 42, position magnet 43, display instrument 44 and wire 45, it is inner that wherein said stock 41 stretches into centrifuge tube 2 by the measured hole 24 in the middle part of the pipe lid 22 of described centrifuge tube 2, it is outside that described main body 42 is located at pipe lid 22, described position magnet 43 to be enclosed within stock 41 and to be located in centrifuge tube 2, and described display instrument 44 is located at the top of hydro-extractor rotating shaft 11 and is connected main body 42 by wire 45; Round-meshed circular slab is established, on the stock that described baffle plate is installed on magnetostriction chi 4 and at the bottom of position magnet 43 and cylinder between 23, the radius of described baffle plate 6 is less than the internal diameter of centrifuge tube 2 centered by described baffle plate 6; Described balance pipe 5 is located on the rotating disk 12 of hydro-extractor 1, and symmetrical centered by hydro-extractor rotating shaft 12 relative to centrifuge tube 2.
The centrifugal force that the utility model utilizes High Rotation Speed to produce is as pressure, utilize ring 7 cutter get pedotheque 8 through being dipped to saturated after put into centrifuge tube 2, setting speed can be started measure, wherein pedotheque 8 moisture of discharging is flowed out by apopore 25 through filter plate 26, enter into the inside of Water collecting tube 3 by catchment screw thread apopore 35 on dividing plate 31 and water check valve 33 and collect again, air in Water collecting tube 3 is discharged to outside centrifuge tube 2 by waterproof vent valve 34 and pore 27, and ensure that moisture can not leak out so that test result is forbidden, again through the water discharge that can calculate under corresponding rotating speed of weighing to Water collecting tube 3, all to pour out moisture after avoiding in prior art each measurement to weigh and the problem of balancing again, intuitively can be measured the height change of pedotheque by magnetostriction chi 4 simultaneously, through calculating the unit weight of pedotheque under setting speed and revising pedotheque 8 water cut, simple to operate, save measuring process and workload, and make the water characteristic curve measured more accurate.
Claims (1)
1. the system utilizing centrifuge method to measure characteristic curve of soil moisture, it is characterized in that, comprise hydro-extractor (1), centrifuge tube (2), Water collecting tube (3), magnetostriction chi (4), balance pipe (5), baffle plate (6), wherein:
The inside of described hydro-extractor (1) is provided with rotating shaft (11) and rotating disk (12), and the outside of described hydro-extractor (1) is provided with operating display (13);
Described centrifuge tube (2) is located on the rotating disk (12) of hydro-extractor (1), comprise pipe shaft (21), at the bottom of pipe lid (22) and pipe (23), wherein said pipe shaft (21) is structure as a whole with (23) at the bottom of pipe, described pipe shaft (21) is cylindrical structural, described pipe lid (22) middle part is provided with measured hole (24), (23) at the bottom of described pipe are provided with apopore (25), at the bottom of the inner close pipe of described pipe shaft (21), (23) place is provided with the filter plate (26) matched with pipe shaft (21) internal diameter size, at the bottom of described pipe shaft (21) and pipe, (23) are provided with the pore (27) interconnected,
Described Water collecting tube (3) is sleeved on the bottom of centrifuge tube (2), described Water collecting tube (3) comprises stack shell (31), be located at dismountable dividing plate that catchments (32) that stack shell (31) is inner, water check valve (33) and waterproof vent valve (34), the described dividing plate that catchments (32) and stack shell (31) are combined to form closed hollow structure, the described dividing plate that catchments (32) is provided with screw thread apopore (35), the water inlet end of described water check valve (33) is threaded connection and is arranged on screw thread apopore (35), the water side of described water check valve (33) is located in the hollow structure that the dividing plate that catchments (32) and stack shell (31) formed, the described dividing plate that catchments (32) is provided with stepped appearance projection, described stepped appearance high spot is provided with threaded air vent (36), described waterproof vent valve (34) to be located in hollow structure that the dividing plate that catchments (32) and stack shell (31) formed and to be threaded connection and is arranged on threaded air vent (36),
Described magnetostriction chi (4) comprises stock (41), main body (42), position magnet (43), display instrument (44) and wire (45), it is inner that wherein said stock (41) stretches into centrifuge tube (2) by the measured hole (24) at pipe lid (22) middle part of described centrifuge tube (2), it is outside that described main body (42) is located at pipe lid (22), described position magnet (43) is enclosed within stock (41) and goes up and be located in centrifuge tube (2), described display instrument (44) is located at the top of hydro-extractor rotating shaft (11) and is connected main body (42) by wire (45),
Described baffle plate establishes round-meshed circular slab centered by (6), the stock that described baffle plate is installed on magnetostriction chi (4) is positioned at the bottom of position magnet (43) and cylinder between (23), and the radius of described baffle plate (6) is less than the internal diameter of centrifuge tube (2);
Described balance pipe (5) is located on the rotating disk (12) of hydro-extractor (1), and symmetrical centered by hydro-extractor rotating shaft (12) relative to centrifuge tube (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520142787.5U CN204439487U (en) | 2015-03-13 | 2015-03-13 | A kind of system utilizing centrifuge method to measure characteristic curve of soil moisture |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520142787.5U CN204439487U (en) | 2015-03-13 | 2015-03-13 | A kind of system utilizing centrifuge method to measure characteristic curve of soil moisture |
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| CN204439487U true CN204439487U (en) | 2015-07-01 |
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| CN201520142787.5U Expired - Fee Related CN204439487U (en) | 2015-03-13 | 2015-03-13 | A kind of system utilizing centrifuge method to measure characteristic curve of soil moisture |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105547905A (en) * | 2015-12-28 | 2016-05-04 | 中建商品混凝土有限公司 | Determination device and method of solid content of waste slurry of concrete mixing station |
| CN105809680A (en) * | 2016-03-06 | 2016-07-27 | 中国水利水电科学研究院 | Soil moisture characteristic curve simulating method based on multiple fractal |
| CN105842039A (en) * | 2016-05-12 | 2016-08-10 | 河海大学 | Centrifuge shield device for centrifugal extraction of soil solution |
| CN105973746A (en) * | 2016-01-25 | 2016-09-28 | 天津城建大学 | Apparatus for testing unfrozen water content of frozen soil, and method thereof |
| CN106033043A (en) * | 2015-03-13 | 2016-10-19 | 西北农林科技大学 | System and method for measuring soil moisture characteristic curve by using centrifuge method |
| CN112326496A (en) * | 2020-04-28 | 2021-02-05 | 胡力涛 | Material moisture content detection device for microwave technology |
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2015
- 2015-03-13 CN CN201520142787.5U patent/CN204439487U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106033043A (en) * | 2015-03-13 | 2016-10-19 | 西北农林科技大学 | System and method for measuring soil moisture characteristic curve by using centrifuge method |
| CN106033043B (en) * | 2015-03-13 | 2018-07-27 | 西北农林科技大学 | A kind of system and measurement method measuring characteristic curve of soil moisture using centrifuge method |
| CN105547905A (en) * | 2015-12-28 | 2016-05-04 | 中建商品混凝土有限公司 | Determination device and method of solid content of waste slurry of concrete mixing station |
| CN105547905B (en) * | 2015-12-28 | 2018-06-08 | 中建商品混凝土有限公司 | A kind of measurement device and assay method of concrete mixing plant waste slurry solid content |
| CN105973746A (en) * | 2016-01-25 | 2016-09-28 | 天津城建大学 | Apparatus for testing unfrozen water content of frozen soil, and method thereof |
| CN105809680A (en) * | 2016-03-06 | 2016-07-27 | 中国水利水电科学研究院 | Soil moisture characteristic curve simulating method based on multiple fractal |
| CN105809680B (en) * | 2016-03-06 | 2019-02-26 | 中国水利水电科学研究院 | A kind of characteristic curve of soil moisture analogy method based on multi-fractal |
| CN105842039A (en) * | 2016-05-12 | 2016-08-10 | 河海大学 | Centrifuge shield device for centrifugal extraction of soil solution |
| CN105842039B (en) * | 2016-05-12 | 2018-12-18 | 河海大学 | A kind of centrifugal centrifuge shield device for extracting the soil liquid |
| CN112326496A (en) * | 2020-04-28 | 2021-02-05 | 胡力涛 | Material moisture content detection device for microwave technology |
| CN112326496B (en) * | 2020-04-28 | 2022-07-19 | 苏州喜全软件科技有限公司 | Material moisture content detection device for microwave technology |
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| C14 | Grant of patent or utility model | ||
| 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: 20150701 Termination date: 20160313 |