CN207991970U - Grain heap compressive deformation and grain heap-bulkhead interfacial pressure test device - Google Patents
Grain heap compressive deformation and grain heap-bulkhead interfacial pressure test device Download PDFInfo
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- CN207991970U CN207991970U CN201820245534.4U CN201820245534U CN207991970U CN 207991970 U CN207991970 U CN 207991970U CN 201820245534 U CN201820245534 U CN 201820245534U CN 207991970 U CN207991970 U CN 207991970U
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Abstract
Include the pedestal with support platform the utility model discloses a kind of grain heap compressive deformation and grain heap bulkhead interfacial pressure test device, the column lower end of door shaped stent both sides extends to below platform on platform is linked together by cross-tie；Be hinged pressing lever in the middle part of cross-tie, and the long and short axis both ends of pressing lever are arranged with counterweight；It is placed with test container in support platform below door shaped stent, it is provided with locating piece in the middle part of the pressing plate of test container inner wall sliding, location dimples are longitudinally offered on locating piece, the screw lower end being screwed on door shaped stent top plate extends into location dimples, and the contact of the fixed vertical displacement meter in the magnetic frame end being placed in support platform is contacted with the upper end of lead screw；Water inlet is offered on the side wall of test container bottom, water inlet is connected by water injection pipe with water volume measuring cylinder, and valve is provided on water injection pipe.The utility model is simple in structure, and a set of equipment can test the multinomial compressive deformation value of grain seed in grain heap.
Description
Technical field
The utility model is related to the compressive deformation of grain heap measurement, more particularly, to a kind of grain heap compressive deformation and grain heap-storehouse
Wall interfacial pressure test device.
Background technology
During foodstuff preservation, because external environment and grain own cells respiration etc. can all cause grain heap fever,
It goes mouldy and insect pest, if processing will cause a large amount of grains rotten not in time.Grain temperature is often controlled by force ventilation in silo
Degree, humidity inhibit phenomena such as going mouldy of generating heat, and grain heap porosity is to study the key parameter of silo force ventilation.Grain heap hole
Rate refers to the ratio between grain heap void volume and grain heap total volume.With the difference of grain heap Filling high, after a period of time, grain heap because
Grain heap porosity caused by its own gravity can change, and with the increase of Filling high, bulk density of grain, compression increase therewith
Add, the compressive deformation that grain is compacted, grain heap is total increases, and pressure not only reduces the hole of grain heap skeleton, while can also make grain
It eats seed and generates compressive deformation, cause grain heap porosity to reduce, ventilation resistance increase, and then influence the ventilation effect of grain heap.Grain
Compressive deformation, the grain heap porosity etc. of grain seed are the key parameters of food storage in the compressive deformation of heap, grain heap.Research pressure
The compressive deformation of grain seed in power and grain heap compressive deformation, grain heap, grain heap porosity relationship to determining rational ventilation side
Formula, reduction grain storage loss are of great significance.
In engineering research, no matter prototype measurement or scale (model) test, measure such as pore water pressure, load, position
The physical quantitys such as shifting can reach quite high precision.It is large volume grain heap, bulkhead side pressure but in grain heap of storing in a warehouse, in silo
Power is the importance that practice and text calculates, but the more of difficulty are then wanted in the measurement of pressure.On the one hand, traditional soil pressure cell
It is usually used in the measurement of soil pressure, soil particle skeleton is smaller and thinks that soil is indeformable, and grain is two-phase substance, grain seed
Size is larger compared to soil particle, and grain is as a kind of bulk solid, and cohesive force is faint between seed, and seed discreteness is larger, compression
Grain heap framework deformation is larger in the process, and grain heap modulus is different from soil, and rigidity is smaller, and grain seed will produce change in compression process
Shape；The relationship between power and deformation and displacement on grain seed is nonlinear, and the mutual contact of grain seed is single
Contact point on.These points or the more specifically actual stress in these small areas are more than using continuum Model as base
A lot of times of the mean stress that plinth is calculated.On the other hand, when measuring grain heap pressure, in grain heap especially scaled model itself,
Originally all there are one distributions for grain heap internal stress field, and after sensor is placed wherein, due to the presence of sensor itself, it will be right
Stress field around the stress field of script especially sensor in grain heap has an impact, and changes original stress distribution.And it passes
The principle that sensor measures pressure is that the sense film of sensor generates deflection deformation under pressure, passes through the survey to deflection deformation
Amount realizes the measurement to pressure.However, being influenced by the deformation of this film, the stress field around sensor will appear divides again
Cloth equally causes the inaccuracy of pressure measurement.
Xu Guangming（Measurement [J] the rock-soil mechanics .2007 of super gravity field median surface soil pressure, 28（12）:2671-2674）If
Counted a kind of miniature soil pressure cell measured with works interface soil pressure for soil, and carried out water pressure, dry sand pressure and
The centrifugal model test of the soil lateral pressure distribution of calibration and diaphram wall in three kinds of media of sand pressure, obtains side
Pressure coefficient.But grain seed is than soil particle bigger, and seed intergranular pore is also bigger than the hole between soil particle more, with interface grain
There are larger differences for pressure sensor calibrating in food pressure and grain heap.
Utility model patent 201521042045.1 discloses a kind of indoor soil pressure cell tank prover.It is mainly by soil pressure
Power box is placed on fixation steel plate sand, then covers soil pressure cell with sand, increases the air pressure in tank prover by pressure control machine,
The pressure that air pressure forces rubber pneumatic bag to generate surface to sand again passes through harvester handle to act on above soil pressure cell
The voltage value of soil pressure cell reflection is collected into, and according to the voltage that pressure gauge reading and soil pressure cell reflect, is obtained soil pressure cell and is existed
Calibration curve in sand.The device is more huge, and rubber pneumatic bag, loading system need to be configured etc., cost is higher, and operation is more
Complexity, and applied in grain heap not yet.
Utility model patent 201520317266.9 discloses embedded soil pressure cell simple calibrating in a kind of sandy soil medium
Device.Its main method is a kind of model casing of design, and soil pressure cell is embedded on bottom plate, by reaction frame to the sand in model casing
Soil pressurization, what is mainly measured is the pressure rather than interfacial pressure in soil.
Utility model patent 201710226558.5 discloses a kind of measurement silo bulk material pressure and sidewall friction power
Test method and device.Its main approaches is by the embedding pressure sensor of grain heap bottom and side wall, passing through data
Acquisition and analysis system measure grain heap pressure and sidewall friction power.The device is to use counterweight for the calibration of pressure sensor
And the demarcating module that sensor is included, counterweight is different from pressure effect caused by grain Loose Bodies, and mistake is brought for measurement result
Difference.
Utility model patent 201510527703.4 discloses a kind of detection method and pressure sensing of quantity of stored grains in granary
Device.It mainly acquires multiple pressure values of grain storage in silo, root by being set to multiple pressure sensors of a silo bottom surface
One side pressure mean value, a bottom surface pressure mean value and a height mean value are obtained to obtain grain storage quantitative value according to multiple pressure values.
Although this method can obtain the pressure value of grain heap one side, pressure sensor is more needed for experiment, and detecting system cost is higher.
At present in research storage grain heap compression, related scholar only considers grain framework deformation mostly, and has ignored grain
The deformation of seed.During practical grain storage, with the increase of Filling high, the pressure that grain heap itself generates increases, because of grain seed
Grain is larger, and there is larger holes between seed and seed, and under grain heap self gravitation effect, grain heap generates compressive deformation,
It includes the compressive deformation of grain heap skeleton and grain seed compressive deformation that it, which is deformed, existing research method and theory, it is difficult to distinguish grain
The compressive deformation of the compressive deformation and grain seed of heap skeleton.
Measurement method about porosity is relatively more, mainly there is bottle method, mercury injection method, buoyancy method, microscopic method, scanning
Method, acoustic method, calculating method etc..The above method is mostly used in engineer application（Such as detect ground, soil, exploration operation）Field, such as
Utility model patent 201420557419.2 discloses a kind of system of loaded coal rock porosity dynamic change, mainly by close
The variation of helium volume accurately measures coal petrography porosity in envelope system.The system need to configure helium tank, pressure reducing valve, air gauge etc.
Device, device air-tightness requires height, and the system is mainly used for the dynamic change of loaded coal rock porosity, measures porosity
Technology is difficult to be applicable in grain heap.
Utility model patent 201620432011.1 discloses a kind of bulk material porosimeter, mainly by vacuumizing
Device goes the internal gas extraction of storeroom in material container, provides kinetic energy using hydraulic cylinder, is incuded by distance-sensor
Distance signal to block passes to processor, and the porosity of storeroom is calculated using processor.The method is to material container
Air-tightness have a higher requirement, and stripper plate and the easy gas leakage in material container inner wall contact slide position influence measurement accuracy, separately
Outer this method needs to configure hydraulic loading system and pumped vacuum systems, and device is huge, not easy to operate.
Field Xiao Hong etc.（Grain porosity measurement means discussion [J] grain processing .2009,34 (5):35-37,45）By certainly
The porosimeter of system is measured the porosity of wheat, corn and soybean, paddy, and the device is equal using two volumes
Not modification pressure vessel A and B, grain materials are filled in container B, seal.It is blown into centainly into container A with air compressor
The gas of pressure obtains grain materials porosity according to The Ideal-Gas Equation.
Wang Juan（Experimental study [D] He'nan University of Technology .2016 of grain heap porosity）Lever consolidation apparatus is reequiped,
Sample is placed in compression box, by being further applied load on top, according to the decrement of sample itself, obtains grain heap pressure and hole
The relationship of ratio.This method thinks that grain compression is framework deformation caused by becoming smaller due to pore volume, has ignored grain sheet
The compressive deformation of body affects the measurement accuracy of experiment.
To sum up, although there are many method for measuring deformation, while there is also measure grain heap interfacial pressure and soil pressure cell design
Device and method, but：（1）Most scholars think that grain seed does not deform, and the deformation of discrete material is only because hole subtracts
It is small to cause, and actual conditions are grain seeds will produce compressive deformation under pressure；（2）Majority takes into consideration only grain heap certainly
Porosity change under right state, does not account in practical grain storage environment, because heap grain height difference grain pressure itself draws
The variation of the grain heap porosity risen, lacks actual application value.（3）Grain seed is larger compared with soil particle, seed and seed
There are larger holes between grain, and the calibration of measurement and soil pressure cell with interface soil pressure is there are prodigious difference, and mesh
The preceding apparatus and method still without pressure sensor calibrating in Accurate Determining interface pressure and grain heap.（4）About grain heap
The computational methods of compressive deformation, some scholars only give roughly computational methods when ignoring the deformation of grain seed, with practical storage
The grain heap actual compression deformation caused by raft height is not inconsistent in grain environment.（5）Existing some scholars are devised for measuring soil
Pressure sensor, but because soil particle with grain seed differs larger, there is also prodigious for the sensor for measuring pressure
Deficiency seriously affects engineering in practice to the accurate measurement of pressure.
Invention content
The purpose of this utility model is to provide a kind of grain heap compressive deformation and grain heap-bulkhead interfacial pressure test device,
Accurately to measure the total compression deformation of grain heap under different pressures, reaches in the practical grain storage environment of simulation and cause because heap is high different
Grain heap inside variation.
To achieve the above object, the utility model can take following technical proposals：
Grain heap compressive deformation described in the utility model and grain heap-bulkhead interfacial pressure test device, including carry support
The column lower end of the pedestal of platform, the door shaped stent both sides being vertically set in the support platform extends to the support platform
Lower section is linked together by cross-tie；Pressing lever, the long axis of the pressing lever are hinged in the middle part of the cross-tie
End set has draw ring, and the hoist cable bottom-loaded being suspended on the draw ring has standard test weight, the short axle end of the pressing lever
Portion is arranged with standard test weight；The test container for containing grain is placed in the support platform below door shaped stent, along described
It is provided with locating piece in the middle part of the pressing plate that test container inner wall slides up and down, location dimples are longitudinally offered on the locating piece, is revolved
The screw lower end being screwed on the door shaped stent top plate extends into the location dimples, the magnetic being placed in the support platform
The contact of the fixed vertical displacement meter in power frame end portion is contacted with the upper end of the lead screw；Side close to the test container bottom
Water inlet is offered on wall, the water inlet is connected by water injection pipe with water volume measuring cylinder, and valve is provided on the water injection pipe
Door.
The quadrangle of the pressing plate offers permeable hole respectively.
The left and right sides wall of the test container is aluminium alloy plate, and front-rear side walls are perspex transparent plate, described
Industrial camera is provided with outside isotropic disk.
The water volume measuring cylinder is in the test container in same horizontal line.
The bottom of the test container is placed with movable floor, is provided in the center position of the movable floor recessed
Slot is placed with pressure gauge in the groove, is tilted in the recess sidewall of the pressure gauge lead-out wire and offers lead perforation,
It is provided with out line groove on pressing plate side wall corresponding with the lead punch position.
It is of low cost the utility model has the advantage of simple in structure, it is easy to operate, it not only can be with using same complete equipment
Test the compressive deformation of grain seed in the total compressive deformation of grain heap, grain heap, the compressive deformation of grain heap skeleton, grain under different pressures
The porosity change of heap can also test different grain kinds and different rulers in the measurement of works interface pressure and grain medium
The measurement of very little embedded pressure gauge calibration.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is usage state diagram when measuring interfacial pressure.
Fig. 4 is the structure chart of movable floor in Fig. 3.
Fig. 5 is the structure chart of pressure gauge in Fig. 4.
Specific implementation mode
More detailed explanation is done to the utility model below in conjunction with the accompanying drawings.
As shown in Figs. 1-2, grain heap compressive deformation described in the utility model and grain heap-bulkhead interfacial pressure test device,
Include the pedestal with support platform 1,2 lower end of column for the door shaped stent both sides being vertically set in support platform 1 extends to
The lower section of support platform 1 is linked together by cross-tie 3；It is hinged with pressing lever 4, pressing lever at 3 middle part of cross-tie
4 long axis end is provided with draw ring, and 5 bottom-loaded of hoist cable being suspended on draw ring has standard test weight 6.1, in pressing lever 4
Stud ends are arranged with simultaneously with standard test weight 6.2 is reused, to control the pressure value of experiment；Branch below door shaped stent
It is placed with the test container 7 for containing grain on support platform 1, it is fixed to be provided with along 8 middle part of pressing plate that 7 inner wall of test container slides up and down
Position block 9, longitudinally offers location dimples on locating piece 9, the lead screw 10 being screwed on door shaped stent top plate（Using tensile property compared with
Good steel lead screw）Lower end extends into location dimples, ensures center pressurization；It is placed on 11 end of magnetic frame in support platform 1
The contact of the fixed vertical displacement meter in portion 12 is contacted with the upper end of lead screw 10, the displacement of pressing plate 8 when recording different pressures；It leans on
Water inlet is offered on the side wall of nearly 7 bottom of test container（Bore 10mm）, water inlet passes through water injection pipe（Caliber 5mm）Be filled with water
Graduated cylinder 13（Volume is 500mL）Sealing connection, is provided with the valve 14 with strainer, it is noted that water volume measuring cylinder 13 on water injection pipe
It should be in same horizontal line with the bottom surface of test container 7.When actual fabrication, between 7 water inlet of valve 14 and test container
Caliber is 10mm, and the caliber between valve 14 and water volume measuring cylinder 13 is 5mm.
When actual fabrication, the aluminium alloy plate of 10mm thickness, forward and backward side wall can be used in the bottom wall and left and right side walls of test container 7
It using the perspex transparent plate of 10mm thickness, is connected by screw bolts between adjacent plate face, centre is lined with rubber pad, and seam crossing is used
703 glue seal, and ensure the seal of test container 7；CCD industrial cameras, CCD industrial cameras are set outside perspex transparent plate
It is fixed on before the transparent plexiglass plate side of test container 7 at the positions 500mm, adjustment makes poly (methyl methacrylate) plate（Form）It is preceding hang down
Face is all placed within the scope of the central region of camera.The pressing plate 8 slided up and down along 7 inner wall of test container（The aluminium alloy of 10mm thickness
Plate）Appearance and size it is smaller compared with test container 7, both facilitate the sliding of pressing plate 8, also to ensure that grain is unlikely to leak out；
The permeable hole 15 for offering diameter 2mm at the corner location of pressing plate 8 respectively, to ventilative and observation liquid level.
The parameter of selected grain heap pressure gauge and measure grain interfacial pressure and to the embedded pressure of different sizes in grain medium
When power meter is demarcated, a movable floor 16 can be placed in the bottom of test container 7, as shown in Figure 3, Figure 4, in dump bottom
The center position of plate 16 is arranged groove, and placement force meter 17 in groove, the shape of pressure gauge 17 is slightly less than groove, ensures wherein
Between stay unlikely excessive at seam, grain cannot be made to enter, certainly can not be too small, in order to avoid influence the embedded of pressure gauge and tear open
It unloads；Depth of groove and box body pressure gauge height are equal, i.e., upper surface is flushed with movable floor 16；Pressure gauge 17 uses side outlet
Mode, therefore the lead perforation 18 for offering diameter 3mm is tilted in the recess sidewall close to pressure gauge 17 lead-out wire（It tilts
45°）, perforate with lead and offer out line groove 19 on corresponding 8 side wall of pressing plate in 18 positions；The lead of pressure gauge 17 is from lead
Perforation 18 is pierced by, and the avris for measuring container 7 is led to along movable floor 16, and the outlet opened up from 8 side wall of pressing plate then up is recessed
Slot 19 is drawn, and data collecting system is accessed.
The concrete structure of pressure gauge 17 used in the utility model is as shown in figure 5, including taking the shape of the letter U structure and outer diameter is D, thickness
Degree is the box body of h, and diameter D is equipped in box body bottom0, thickness t sensor sensing film.Set a diameter of of grain seed
D, due to the particle size compared to soil, the size of grain seed is much greater, so when testing grain heap pressure, grain seed
Deflection cannot ignore, that is to say, that d/D0Grain heap pressure be can not ignore.If the size selection mistake of sensor sensing film
Small, then the pressure measured is inaccurate, and sensor sensing membrane area is excessive, and there are excessive sensor sensing films and grain phase
Interaction influences pressure testing results.Therefore, when testing silo pressure, to the preferably extremely heavy of sensor sensing film size
It wants.The utility model can be by testing grain data, and carries out the design of pressure gauge accordingly.Measuring carries out wheat grain
The diameter D of the sensor sensing film of pressure gauge 17 used when heap pressure test0Effect is tested when for 28mm, thickness t being 0.4mm
The most precisely.
The test of grain heap compressive deformation and computational methods are as follows：
1, grain seed in the total compressive deformation of grain heap, the compressive deformation of grain heap skeleton, grain heap under different load actions
Compressive deformation, the experiment of grain heap porosity test：
The inside dimension that test container 7 is measured with vernier caliper, acquires cross-sectional area A, grain seed is carefully poured into
In test container 7, makes the loading of grain seed at away from the positions side plate top edge 5mm, grain is shakeout；Pressing plate 8 is placed
In on grain seed；Vertical displacement meter 12 is fixed on by magnetic frame 11 in support platform 1, the contact of vertical displacement meter 12 with
10 top contact of lead screw, 10 times contacts of lead screw are positioned in the longitudinal register pit of locating piece 9 on pressing plate 8, observe vertical displacement
The reading of meter 12h 0；Valve 14 is closed, enough drops are packed into water volume measuring cylinder 13 color（Such as red）Clear water, record are filled with water
The volume of initial water in graduated cylinder 13V 0；CCD industrial cameras are fixed on before the transparent plexiglass plate of test container 7 500mm
Place is set, visual angle is adjusted, so that the preceding vertical plane of organic glass form is all placed within the scope of the central region of camera, take pictures, pass through figure
As treatment technology, grain heap skeleton area is obtainedS 0, grain seed area, grain seed long axis axial lengtha 0, short axle axial lengthb 0；Root
Load requires according to the experiment, in the 5 bottom-loaded standard test weight 6.1 of long axis hoist cable of pressing lever 4, at the short axle end of pressing lever 4
Portion is arranged simultaneously with standard test weight 6.2 is reused, and system is in stress state, and pressure value isP 1, after stablizing, read vertical displacement
The numerical value of meter 12h 1, Digital image technology extraction grain heap skeleton areaS 1, grain seed area, grain seed long axis axial lengtha 1、
Short axle axial lengthb 1, obtain seed deflection；Valve 14 is opened, test container 7 is injected water into, is observed by transparent organic glass
Liquid level rises situation, waits for that liquid level rises at the lower edge of pressing plate 8, and liquid level is observed by permeable hole 15, until just contacting pressing plate 8
When bottom, valve 14, the volume of record injection water are closedV 1；It is obtained respectively under the pressure with image processing techniques by calculating
The compressive deformation of grain seed, grain heap porosity in the total compressive deformation of grain heap, the compressive deformation of grain heap skeleton, grain heap；Change and adds
Load value（Change the weight of standard test weight 6.1 and 6.2）, repeat above-mentioned experiment, you can obtain the grain heap pressure under different pressures effect
Compression deformation and porosity.
To sum up, the total compressive deformation of grain heap test unitIt is measured by vertical displacement meter 12, grain seed in grain heap
Compressive deformationIt is analyzed by digital image processing techniques, grain heap framework deformation subtracts grain by the total deformation of grain heap test unit
Eat seed deformation gained：。
It can show that the total compressive deformation of the lower grain heap of different pressures effect, the compression of grain heap skeleton become with image processing techniques
The compressive deformation of grain seed, grain heap porosity in shape, grain heap：
A certain pressure is acted on into the photo that lower 7 surface of test container bat takes and sets up one suitably by the gray value to image
Threshold value come distinguish grain seed and hole roughly；Then Morphological watersheds cutting techniques are utilized, in conjunction with image smoothing, region
The processing methods such as label obtain edge image, use two-dimensional functionThe picture for indicating shooting, by continuous function discretization,
The edge coordinate of grain seed and some other information are obtained out from image；And then the size shape of grain seed can be obtained
Parameter, size shape parameter of hole etc..
Computational methods are as follows：
The total deformation of grain heap test unit
The strain of sample cell
The strain of grain heap middle skeleton
The strain of grain seed in grain heap
The compression modulus of grain heap skeleton
The compression modulus of grain seed
The total deformation of grain heap
The porosity of grain heap。
2, grain interfacial pressure measure and grain medium in the different embedded pressure gauges of size rating test：
The pressure gauge 17 of corresponding size is positioned in the groove of movable floor 16, pressure gauge 17 and 16 upper table of movable floor
Face is concordant, and 17 lead of pressure gauge is pierced by from lead perforation 18, the avris for measuring container 7 is led to along movable floor 16, then up
What is opened up from 8 side wall of pressing plate goes out the extraction of line groove 19, accesses data collecting system.Grain seed is carefully poured into measurement container
In 7, makes the loading of grain seed at away from the positions side plate top edge 5mm, grain seed is shakeout；Pressing plate 8 is positioned over grain seed
On grain；Vertical displacement meter 12 is fixed on by magnetic frame 11 on platform, contact and 10 top of lead screw of vertical displacement meter 12 connect
It touches, 10 times contacts of lead screw are positioned in the longitudinal register pit of locating piece 9 on pressing plate 8, the reading of observation vertical displacement meter 12；Root
Load requires according to the experiment, in the 5 bottom-loaded standard test weight 6.1 of long axis hoist cable of pressing lever 4, at the short axle end of pressing lever 4
Portion is arranged simultaneously with standard test weight 6.2 is reused, and system is in stress state, after stablizing, reads the numerical value of vertical displacement meter 12,
The value in data collecting system is recorded simultaneously, obtains grain interfacial pressure.
The movable floor 16 for replacing different fluting sizes, repeats above-mentioned experiment, obtains different size insertions in grain medium
The calibration of formula pressure gauge 17.
3, the design experiment of pressure meter：
By the measurement to pressures such as wheat, corn, paddy, soybean, according to different grain heap seed diameters, grain heap mould
The influences of the factors to factor to pressure such as amount, determine film diameter, film thickness, the sensor material of grain heap pressure sensor
Deng the design of completion grain heap pressure gauge, that is to say, that according to different grain characteristics, design different sense film diameters, induction
Film thickness and induction membrane material so that pressure gauge can reflect the characteristic of grain seed diameter, reflect grain seed compressibility
And the relative deformation of grain heap and sense film.
Claims (5)
1. a kind of grain heap compressive deformation and grain heap-bulkhead interfacial pressure test device, it is characterised in that：Including carrying support platform
Pedestal, the column lower end for the door shaped stent both sides being vertically set in the support platform extends under the support platform
Side, is linked together by cross-tie；Pressing lever, the longitudinal end of the pressing lever are hinged in the middle part of the cross-tie
Portion is provided with draw ring, and the hoist cable bottom-loaded being suspended on the draw ring has standard test weight, the stud ends of the pressing lever
It is arranged with standard test weight；The test container for containing grain is placed in the support platform below door shaped stent, along the survey
It is provided with locating piece in the middle part of the pressing plate that examination container inner wall slides up and down, location dimples is longitudinally offered on the locating piece, screws
Screw lower end on the door shaped stent top plate extends into the location dimples, the magnetic force being placed in the support platform
The contact of the fixed vertical displacement meter in frame end portion is contacted with the upper end of the lead screw；Side wall close to the test container bottom
On offer water inlet, the water inlet is connected by water injection pipe with water volume measuring cylinder, and valve is provided on the water injection pipe.
2. grain heap compressive deformation according to claim 1 and grain heap-bulkhead interfacial pressure test device, it is characterised in that：
The quadrangle of the pressing plate offers permeable hole respectively.
3. grain heap compressive deformation according to claim 1 and grain heap-bulkhead interfacial pressure test device, it is characterised in that：
The left and right sides wall of the test container is aluminium alloy plate, and front-rear side walls are perspex transparent plate, outside the transparent panel
It is provided with industrial camera.
4. grain heap compressive deformation according to claim 1 and grain heap-bulkhead interfacial pressure test device, it is characterised in that：
The water volume measuring cylinder is in the test container in same horizontal line.
5. grain heap compressive deformation according to claim 1 and grain heap-bulkhead interfacial pressure test device, it is characterised in that：
The bottom of the test container is placed with movable floor, fluted in the center position setting of the movable floor, described recessed
It is placed with pressure gauge in slot, is tilted in the recess sidewall of the pressure gauge lead-out wire and offers lead perforation, drawn with described
It is provided with out line groove on the corresponding pressing plate side wall of line punch position.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108414364A (en) * | 2018-02-11 | 2018-08-17 | 河南工业大学 | A kind of grain heap test device and the method using device measurement grain heap compressive deformation and grain heap interfacial pressure |
| CN109166443A (en) * | 2018-10-24 | 2019-01-08 | 河南工业大学 | A kind of vertical silo model synthesis experiment platform |
| CN110068504A (en) * | 2019-06-09 | 2019-07-30 | 河南工业大学 | The device and method that a kind of test grain inside temperature and humidity influences its compression property |
| CN112461665A (en) * | 2020-12-02 | 2021-03-09 | 华北科技学院 | High-precision measurement device and test method for interface pressure distribution of silo test model |
| CN114509347A (en) * | 2022-01-06 | 2022-05-17 | 河南工业大学 | Silo model equipment and hoop pressure loading device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414364A (en) * | 2018-02-11 | 2018-08-17 | 河南工业大学 | A kind of grain heap test device and the method using device measurement grain heap compressive deformation and grain heap interfacial pressure |
| CN108414364B (en) * | 2018-02-11 | 2023-09-15 | 河南工业大学 | Grain pile testing device and method for measuring grain pile compression deformation and grain pile interface pressure by adopting same |
| CN109166443A (en) * | 2018-10-24 | 2019-01-08 | 河南工业大学 | A kind of vertical silo model synthesis experiment platform |
| CN110068504A (en) * | 2019-06-09 | 2019-07-30 | 河南工业大学 | The device and method that a kind of test grain inside temperature and humidity influences its compression property |
| CN110068504B (en) * | 2019-06-09 | 2024-01-30 | 河南工业大学 | Device and method for testing influence of internal temperature and humidity of grain on compression characteristics of grain |
| CN112461665A (en) * | 2020-12-02 | 2021-03-09 | 华北科技学院 | High-precision measurement device and test method for interface pressure distribution of silo test model |
| CN114509347A (en) * | 2022-01-06 | 2022-05-17 | 河南工业大学 | Silo model equipment and hoop pressure loading device thereof |
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