CN204495674U - A kind of device being measured P in soil F curve by centrifuge method - Google Patents
A kind of device being measured P in soil F curve by centrifuge method Download PDFInfo
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- CN204495674U CN204495674U CN201520195834.2U CN201520195834U CN204495674U CN 204495674 U CN204495674 U CN 204495674U CN 201520195834 U CN201520195834 U CN 201520195834U CN 204495674 U CN204495674 U CN 204495674U
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Abstract
The utility model discloses a kind of device being measured P in soil F curve by centrifuge method, comprise hydro-extractor, centrifuge tube, Water collecting tube, Shang type chi, surge drum, 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; Shang type 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 measurement mechanism of P in soil F curve, especially a kind of device being measured P in soil F curve by centrifuge method.
Background technology
Characteristic curve of soil moisture is generally also called soil characteristic curve 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; The characteristic curve of centrifuge method survey simultaneously also can make the soil weight change, and the water content in soil sample error measured is comparatively large, and the soil characteristic curve of thus making is not accurate enough.
Utility model content
For solving above-mentioned the problems of the prior art, the utility model provides a kind of device being measured P in soil F curve by centrifuge method.
The technical solution adopted in the utility model is: a kind of device being measured P in soil F curve by centrifuge method, comprises hydro-extractor, centrifuge tube, Water collecting tube, Shang type chi, balance pipe, 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 notch cuttype projection, described notch cuttype 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,
State Shang type chi and comprise the graduated chi bar of band and be located at the baffle plate of chi bar one end, described baffle plate is located in centrifuge tube, and the other end of described chi bar stretches out outside centrifuge tube through measured hole;
Described balance pipe is located on the rotating disk of hydro-extractor, and symmetrical centered by hydro-extractor rotating shaft relative to centrifuge tube, and the rotating disk for equilibrium centrifugation machine vibrates to avoid producing.
Further, described baffle plate is circular slab.
Under the centrifugal action that the utility model produces at High Rotation Speed, 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.Meanwhile, pedotheque can produce compression under centrifugal action, and Suo Shu Shang type chi moves along with the movement of pedotheque, can draw the decrement of described pedotheque according to the scale of chi bar.
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 rotating speed is calculated by poidometer, 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 Tong Guo Shang type chi directly can read the soil compression amount under each setting speed, for the unit weight of the pedotheque calculated under each setting speed, and then the water cut of pedotheque under corresponding rotating speed is revised, not only make the PF 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-Shang type chi, 41-chi bar, 42-baffle plate, 5-balance pipe, 6-cutting ring, 7-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 device utilizing centrifuge method to measure soil characteristic curve, comprises hydro-extractor 1, centrifuge tube 2, Water collecting tube 3, Shang type chi 4, balance pipe 5, 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 3 comprises 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 notch cuttype projection, and described notch cuttype 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; State the baffle plate 42 that Shang type chi 4 comprises the graduated chi bar of band 41 and be located at chi bar 41 one end, described baffle plate 42 is for circular slab and be located in centrifuge tube 2, and the other end of described chi bar 41 stretches out outside centrifuge tube 2 through measured hole 24; 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, Tong Guo Shang type chi 4 intuitively can measure the height change of pedotheque 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 (2)
1. measured a device for P in soil F curve by centrifuge method, it is characterized in that, comprise hydro-extractor (1), centrifuge tube (2), Water collecting tube (3), Shang type chi (4), balance pipe (5), 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 notch cuttype projection, described notch cuttype 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),
State Shang type chi (4) and comprise the graduated chi bar (41) of band and be located at the baffle plate (42) of chi bar (41) one end, described baffle plate (42) is located in centrifuge tube (2), and the other end of described chi bar (41) stretches out centrifuge tube (2) outward through measured hole (24);
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).
2. a kind of device being measured P in soil F curve by centrifuge method as claimed in claim 1, is characterized in that described baffle plate (42) is circular slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520195834.2U CN204495674U (en) | 2015-04-02 | 2015-04-02 | A kind of device being measured P in soil F curve by centrifuge method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520195834.2U CN204495674U (en) | 2015-04-02 | 2015-04-02 | A kind of device being measured P in soil F curve by centrifuge method |
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| CN204495674U true CN204495674U (en) | 2015-07-22 |
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| CN201520195834.2U Expired - Fee Related CN204495674U (en) | 2015-04-02 | 2015-04-02 | A kind of device being measured P in soil F curve by centrifuge method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319144A (en) * | 2015-12-09 | 2016-02-10 | 李琛 | Digital display tensile-sensitive hole ratio tester and detecting method thereof |
| CN110095374A (en) * | 2019-04-08 | 2019-08-06 | 三峡大学 | The device and method of soil-water characteristic curve is surveyed with salt solustion mehtod |
-
2015
- 2015-04-02 CN CN201520195834.2U patent/CN204495674U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319144A (en) * | 2015-12-09 | 2016-02-10 | 李琛 | Digital display tensile-sensitive hole ratio tester and detecting method thereof |
| CN110095374A (en) * | 2019-04-08 | 2019-08-06 | 三峡大学 | The device and method of soil-water characteristic curve is surveyed with salt solustion mehtod |
| CN110095374B (en) * | 2019-04-08 | 2022-03-08 | 三峡大学 | Device and method for measuring soil-water characteristic curve by using salt solution method |
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| Date | Code | Title | Description |
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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 |
Granted publication date: 20150722 Termination date: 20160402 |
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| CF01 | Termination of patent right due to non-payment of annual fee |