CN108227796A - Grain heap multi- scenarios method experimental provision in bulk - Google Patents
Grain heap multi- scenarios method experimental provision in bulk Download PDFInfo
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- CN108227796A CN108227796A CN201810141040.6A CN201810141040A CN108227796A CN 108227796 A CN108227796 A CN 108227796A CN 201810141040 A CN201810141040 A CN 201810141040A CN 108227796 A CN108227796 A CN 108227796A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/51—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for storing agricultural or horticultural products
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- Storage Of Harvested Produce (AREA)
Abstract
The invention discloses a kind of grain heap multi- scenarios method experimental provisions in bulk, including upper open mould babinet, temperature and relative humidity are provided in babinet, the forward and backward side wall of model babinet is provided with observation window；The left and right side walls of babinet are cavity structure, and the circulating water pipe being connected with external high and low temperature control system is respectively disposed in it, and box opening is provided with servo flexibility Loading Control System：The system includes withholding the cover board in box opening, and being horizontally disposed under cover board has pressure air bag, and air bag is issued equipped with pressure sensor.The configuration of the present invention is simple, it is easy to operate, accuracy is high, using filling the model babinet of grain as a certain specific location in silo, pass through control pressurer system, temperature control system, ventilated control system, visualization window, and infrared hot digital picture and sessile drop method, multinomial measure be combined with each other, realize to grain heap Pressure Field, temperature field, moisture field, Tiny pore field multi- scenarios method rule research.
Description
Technical field
The present invention relates to the measurement of large warehoused grain heap, more particularly, to a kind of one-dimensional multi- scenarios method experiment dress of grain heap in bulk
It puts.
Background technology
The safe storage issue concerns of grain are to national economy and national security.In all storehouse types of foodstuff preservation, put down
Room storehouse is with its capacity is big, low cost, is widely used into putting out cereal the features such as facilitating.The grain built in state grain depot at present
More than 85% storehouse storehouse type is bulk grain horizontal warehouse, therefore the stored grain safety of horizontal warehouse is particularly important.
It is investigated according to FAO (Food and Agriculture Organization of the United Nation), the annual foodstuff preservation in the whole world is because of loss 3% of going mouldy, because of pest injurious loss 5%,
Total total 8%.In recent years, China's grain yield continuously improves, and produces grain per year more than 600,000,000 tons, and national grain inventory is in history height
Position, it is extremely prominent that contradiction is stored up in part main producing region, it is ensured that grain storage quality safety difficulty is larger, grain post-harvest loss incredible amount.
Correlative study shows to be stored in the large volume grain heap in silo, and there is pressure fields, temperature field, moisture field, micro-
Multiple physical fields such as airflow field, there is close correlation, i.e. coupled relation between each physical agent, and each physical field is
Influence stored grain quality, grain is even caused to go mouldy, insect pest an important factor for.Therefore, grain heap multiple physical field coupling model is built,
The state change rule between more physical agents such as grain heap pressure field, temperature field, moisture field, Tiny pore field is controlled, instructs grain
Storage, reduces grain insect pest and goes mouldy, and ensures that stored grain quality has become one of grain storage main problem in the urgent need to address.
During foodstuff preservation, because external environment and grain itself respiration etc. can all cause the generating heat of grain heap, mould
Change and insect pest, if processing can cause a large amount of grains to go bad not in time.So grain is often controlled by force ventilation in silo
Temperature, humidity, and then inhibit the fever of grain heap and phenomena such as going mouldy, and grain heap porosity is then the pass for studying silo force ventilation
Bond parameter.Grain heap porosity refers to the ratio between grain heap void volume and grain heap total volume.Increase and grain heap with Filling high
The increase of pressure, grain is compacted, bulk density of grain increases, porosity reduces, ventilation resistance increases, and is not easy to obtain in a short time
Ideal reducing temperature and humidity effect.So the relation pair of research grain heap pressure and porosity determines rational ventilation index, reduces and store up
Grain loss is of great significance.
The coupling to focus mostly between two physical fields of grain heap to the research of grain heap multi- scenarios method at present, such as the wet biography of grain heap heat
Numerical simulation study, the numerical simulation study of grain heap stream-power, grain heap moisture condensation simulated experiment for passing etc., Canadian Manitoba is big
It learns research and focuses primarily upon stored grain ecological system modeling, grain heap hot spot and safe storage condition, the flowing of grain heap air-flow, pest is in grain
The relationship between migration, distribution and sampling, trapping in food, image processing techniques assessment stored grain quality etc., about grain heap pressure
Field, temperature field, moisture field, Tiny pore field Coupling Rule then study it is less.Institute of Science and Technology, National Food Bureau has built wheat
Grain heap condenses simulation experiment platform, and main purpose is to study temperature during foodstuff preservation, moisture distribution and changed
Journey, but the temperature and moisture of grain heap are only accounted for, do not account for large volume grain heap grain heap space because of caused by its own gravity
The influence that the inhomogeneities of pressure field distribution brings foodstuff preservation.
In large volume silo grain heap storage, because of the difference of Filling high, grain heap is under self gravitation effect, hole
Rate changes, and the variation of grain heap porosity, can influence the migration of grain heap Tiny pore and moisture, so as to cause grain heap temperature,
The inhomogeneities of moisture distribution.
Summer, warehouse is under solar radiation effect, and bulkhead ambient temperature is stepped up, because of the bad thermal conduction characteristic of grain itself
Influence, grain heap itself can be formed a surrounding hanker between cold " hot skin cold core " state, form silo stationary field.Can calorimetric by
Bulkhead surrounding is directed toward inside grain heap, and equally, according to the principle of water translocation, moisture is consistent with the direction of energy heat transfer, i.e. table
The high temperature of layer makes water translocation, and to inner layer, so that skin temperature increases, moisture reduces.And the environmental benefits of high temperature and humidity are in micro-
Biology and the growth of pest, the environment grain of high temperature low humidity will not be then destroyed.Because intermediate cold core region is larger, migrate to cold
The moisture of core is comparatively small namely low temperature and low humidity environment, will not equally derive microorganism.Peripheral high temperature low humidity, it is inner
Layer low temperature and low humidity under the action of the inside and outside temperature difference, forms Tiny pore cycle, such state is a stable state.
In winter, external environment temperature is relatively low, energy heat flow be directed toward with summer on the contrary, but energy heat transfer to bulkhead can lead to
It crosses heat exchange and scatters and disappears, and water translocation to bulkhead can be detained due to bulkhead completely cuts off, with the variation in season and the product of moisture
It is tired, moisture condensation can be formed, and then cause going mouldy for grain.People is strengthened in the breeding that suitable temperature and humidity will encourage microorganism again
Work intervention and grain storage regulation and control, it will preferably regulate and control humiture in storehouse, and then inhibit the growth of microorganism.
The phenomenon that Tiny pore is also similary, by transpiration, moisture can move up, and encountering cold air on grain heap top can coagulate
Knot, encountering bulkhead can also condense on bulkhead, that is, so-called knot top and knot wall phenomenon.It is but not exhausted in grain heap storage
To will appear condense, the unstable states such as go mouldy, depend primarily on the migration velocity of moisture.The temperature difference is bigger, water transport speed
Degree is faster, otherwise rate of water migration is slower, if the temperature difference is smaller in grain heap, causes the water translocation time when being longer than season alternation
Between, moisture condensation would not be formed or gone mouldy.So grain storage can or can not go wrong, first, depending on the temperature difference, two depend on Tiny pore
Intensity.
To sum up, during practical grain storage, under the effect of the factors such as environment, pressure field, temperature are existed simultaneously inside grain heap
Multiple physical fields such as field, moisture field, Tiny pore field are spent, and are influenced each other between each physical agent, goes mouldy, tie caused by grain heap
Dew, insect pest etc. are not the influences between certain individual two field, but the coupling of multiple physical field, this is existing experimental provision
It could not consider.It realizes the experiment of grain heap multiple physical field coupling, is not only able to make up the reality of existing grain storage grain heap multi- scenarios method
Proved recipe method, and the basis for the more science that provides can be provided for Grain Reserve Ecology.In consideration of it, inside a kind of achievable grain heap of invention
Multiple physical field（Pressure field, temperature field, moisture field, Tiny pore field）The experiment porch of Coupling Research is particularly important.
Invention content
The purpose of the present invention is to provide a kind of grain heap multi- scenarios method experimental provision in bulk, by control pressure, temperature, wet
Degree, ventilation condition etc. simulate the environmental condition of different location in different zones and silo, for research grain heap pressure field, temperature
The multi- scenarios method basic law of field, moisture field and Tiny pore field establishes the background mathematics model of a multiple physical field coupling.
To achieve the above object, the present invention can take following technical proposals：
Grain heap multi- scenarios method experimental provision in bulk of the present invention is used to contain the upper opening mould of grain including square structure
Molding box body is provided with temperature and relative humidity in the model casing body, and the forward and backward side wall of the model babinet is provided with observation window；
The left and right side walls of the model babinet are cavity structure, are respectively disposed with circulating water pipe inside it, described left and right
Circulating water pipe in side wall is connected respectively with external high temperature control system and low-temperature control system；
The opening of the model babinet is provided with servo flexibility Loading Control System, the servo loading control system includes
The cover board in the model box opening is withheld, the lower horizontal of the cover board is provided with pressure air bag, in the pressure gas
With being provided with pressure sensor on the contact surface of grain below capsule.
The high-temperature control system includes high temperature water tank, and heating unit, the mould are provided in the high temperature water tank
The entery and delivery port of circulating water pipe is connected by carrying the hot water pipeline of circulating pump with the high temperature water tank in molding box body left side wall
It is logical；The low-temperature control system includes low temperature water tank, and cooling device, the model babinet are provided in the low temperature water tank
The entery and delivery port of circulating water pipe is connected by carrying the cold water pipes of circulating pump with the low temperature water tank in right side wall.
The left and right side walls outer surface is provided with insulating layer；The heating unit is air-heating type totally-enclosed compressor group；
The cooling device is air-cooled totally-enclosed compressor group.
It is tightly connected between the corresponding ventilation hole opened up on the inside and outside laminate of the left and right side walls and forms ventilating duct, it is described
Closeouts have been screwed on the outside of ventilating duct.
Tiny pore collecting hood is installed in the left and right side walls external seal, the Tiny pore collecting hood exit is connected with
Transparent horizontal duct is placed with drop in transparent horizontal duct.
The air outlet of the centrifugal fan of work is controlled to pass through ventilation duct and model by wind pressure control system by computer
Ventilating duct on wall box is connected.
The pressure air bag is made of mutually independent multiple blister cavities, and the lower surface of the cover board is and multiple blister cavities sizes
The compartment-type structure to match is provided with rubber pad on the faying face of the blister cavities and cover board.
Control is adjusted by barometric pressure servo-control system by computer in the atmospheric pressure of the pressure air bag.
Industrial camera is provided with outside one of observation window of the model babinet, is provided with outside another observation window
Thermal-induced imagery equipment.
The experimental provision is placed in constant-temperature constant-humidity environment, and the constant-temperature constant-humidity environment is adjusted by constant temperature and humidity machine.
The advantage of the invention is that simple in structure, easy to operate, accuracy is high, this experimental provision is using the mould for filling grain
Molding box body is as a certain specific location in silo, by being disposed thereon the control pressurer system of opening and being arranged on its side
Temperature control system outside wall, can accurate simulation different zones, Various Seasonal, different Filling highs, different Temperature Humidity Combinations items
Grain storage environment under part；By ventilated control system, can process be adjusted with the force ventilation during the practical grain storage of accurate simulation；
By visualization window, with the variation of Digital image technology research grain heap interior porosity；It can by infrared hot digital picture
To study the transition process of Tiny pore in grain heap；By water droplet method, the variation of the grain heap Tiny pore caused by the temperature difference is studied；It is multinomial
Measure be combined with each other, realize to grain heap Pressure Field, temperature field, moisture field, Tiny pore field multi- scenarios method rule research.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the structure chart of Fig. 1 middle left and right side walls.
Fig. 3 is the schematic diagram of Fig. 1 cavity structure side walls.
Specific embodiment
More detailed explanation is done to the present invention with reference to specific attached drawing.
As shown in Figure 1, grain heap multi- scenarios method experimental provision in bulk of the present invention, is used to contain including square structure
The upper open mould babinet 1 of grain, the size of model babinet 1 is 1m × 1m × 1m, and pressure sensor is provided in model babinet 1
And temperature and relative humidity（Sensing station is typically placed in the center of model babinet 1, and lead can draw from opening, connect
Enter data collecting system）, grain porosity and the dynamic change of Tiny pore in model casing body in order to facilitate observation of, in model babinet 1
Forward and backward side wall setting observation window 2（During actual fabrication, transparent organic glass can be used in forward and backward side wall）, in an observation window
Outer setting CCD industrial cameras 3, set thermal-induced imagery equipment outside another observation window（It is not shown in figure）；Model babinet 1
Left and right side walls be cavity structure（It is made of metallic plate）, it is respectively disposed with circulating water pipe inside it（Such as Fig. 2 institutes
Show）, the circulating water pipe in left and right side walls is connected respectively with external high temperature control system and low-temperature control system；In model casing
The opening of body 1 is provided with servo flexibility Loading Control System.
Specifically, it is the temperature gradient in the practical silo of accurate simulation, high-temperature control system of the invention includes arrangement
High temperature circulation water pipe in left side wall 4.1, the water inlet of high temperature circulation water pipe is by carrying the hot water of high temperature side circulating pump 5.1
Pipeline is connected with high temperature water tank 6.1, and water outlet is connected by water return pipeline with the water inlet of high temperature water tank 6.1,
Air-heating type totally-enclosed compressor group heating unit is provided in high temperature water tank 6.1（Commercial product）, by circulating water heating extremely
The temperature of requirement of experiment（Maximum temperature is no more than 98 DEG C, and minimum temperature is 30 DEG C, can cover the high temperature ring of granary storage substantially
Border）, water supplement port on high temperature water tank 6.1 can also be set when necessary, quantity of circulating water is supplemented（It can certainly will be upper
Lid, which is removed, directly carries out moisturizing）；The low-temperature control system of the present invention includes the low-temperature circulating water pipe being arranged in right side wall 4.2,
The water inlet of low-temperature circulating water pipe is connected by carrying the cold water pipes of low temperature side circulating pump 5.2 with low temperature water tank 6.2,
Water outlet is connected by water return pipeline with the water inlet of low temperature water tank 6.2, is provided in low temperature water storage box 6.2 air-cooled
Totally-enclosed compressor group（Commercial product）, it is sent into after water is freezed（Or directly freezed using miniature cooling-water machine）, according to practical reality
Requirement is tested, cold water temperature can be adjusted between 0 ~ 30 DEG C；It, can be in left and right sidewall to improve the heat insulation effect of left and right side walls
Outer surface sets insulating layer.
For the force ventilation regulating effect during the practical grain storage of accurate simulation, Ventilation Control system has also been devised in the present invention
System：It is tightly connected between the corresponding ventilation hole opened up on the inside and outside laminate of left and right side walls and forms ventilating duct, on the outside of ventilating duct
Closeouts are screwed（Closure bolt with sealing ring）；During experiment, wind pressure control system 11 is passed through by computer 9（Wind pressure control
Device processed）The air outlet of the centrifugal fan 12 of work is controlled to be connected by ventilation duct with the ventilating duct on 1 side wall of model babinet,
The ventilation quantity of certain wind pressure is provided with to the grain heap in model babinet 1.
Infundibulate Tiny pore collecting hood is installed in left and right side walls external seal, as shown in figure 3, by taking right side wall 4.2 as an example（It is left
Side wall is identical）：Infundibulate Tiny pore collecting hood 4.3 is connected outside right side wall 4.2, is connected in the exit of Tiny pore collecting hood 4.3
Transparent horizontal duct 4.4 is connected to, drop 4.5 is placed in transparent horizontal duct 4.4（The drop 4.5 have it is small, unit weight is small,
Viscosity resistance is small, nonvolatile property）, at this time under non-ventilation state, unscrew closeouts, the different temperature meeting of left and right side walls
Tiny pore is formed in model babinet 1, Tiny pore pushes drop in being collected by Tiny pore collecting hood 4.3 into transparent conduit 4.4
4.5 movements, you can to study the total Tiny pore amount of grain heap under different action of thermal difference.
The servo loading control system that the present invention uses includes withholding the cover board 7 in 1 opening of model babinet（By high intensity
Steel Precision Machining into）, the lower horizontal of cover board 7 is provided with pressure air bag 8, is connect below the pressure air bag 8 with grain
Pressure sensor is provided in contacting surface.It is balanced to the pressure of grain heap in model babinet 1 to ensure, pressure air bag 8 during actual fabrication
It can be by mutually independent multiple（Four are shown as in figure）Blister cavities forms, and the lower surface of cover board 7 is and blister cavities quantity and size
The compartment-type structure to match is provided with rubber pad on the faying face of blister cavities and cover board 7, can effectively avoid the abrasion of blister cavities.
During experiment, control can be adjusted by barometric pressure servo-control system 10 by computer 9 in the air pressure inside power of 8 each blister cavities of pressure air bag
System.Pressure sensor is provided on contact surface below pressure air bag 8 with grain heap（Grain upper surface can be laid with one layer of geotechnique
Cloth, pressure sensor are arranged in geotextiles）；After gas enters pressure air bag 8 pressure can be generated to grain heap（Grain heap pressure value
It can be acquired by pressure sensor）, and cover board 7 plays confining pressure air bag 8 and provides counter-force to pressure air bag simultaneously
Effect；Relative to Rigid Plates Under Compression, the pressure that the pressure air bag 8 of flexibility loading applies is more uniform, and computer is used to feed back
Control can make the load of loading continual and steady.Heat to ensure model babinet 1 is transmitted in one-dimensional square, in model babinet 1
Bottom surface can be laid with insulating pad layer.
To realize the grain storage environment of simulation different zones, Various Seasonal, experimental provision of the invention is placed on constant temperature and humidity
Environment（Such as thermostatic constant wet chamber 13）In, the humiture of the constant-temperature constant-humidity environment can be adjusted by constant temperature and humidity machine 14.
The one-dimensional multi- scenarios method experimental provision application method of grain heap in bulk of the present invention is as follows：
1st, prepare：Laboratory temperature environment is adjusted, the wheat/corn/paddy for preparing enough different water cuts is placed in constant temperature and humidity
In room 13, make cereal temperature consistent with environment temperature, humidity reaches equilibrium state；Measure wheat/corn/paddy rigidity, selection
The rubber pad being close with wheat/corn/paddy rigidity is pasted in model babinet 1 on the metallic plate of the left and right sides, ensures boundary
Condition is approached with grain heap rigidity；One layer of rubber pad is arranged in the downside of pressure air bag 8, for the stickup of pressure sensor, and is protected
Demonstrate,prove the uniformity of pressurization.
2nd, calibration sensor：By the measurement experiment of grain and works interfacial pressure, to wheat/corn/paddy
Pressure is demarcated, and selects the pressure sensor of suitable dimension；By preliminary experiment, to temperature sensor, humidity sensor into
Rower is determined, and can meet the requirement that experiment measures.
3rd, photogrammetric apparatus is arranged：CCD industrial cameras 3 are fixed on in front of the preceding observation window of model babinet 1 1.0m
Place is put, adjustment makes the preceding vertical plane of organic glass observation window 2 all be placed in the range of the central region of camera；Thermal-induced imagery is set
Standby camera is fixed at the outer 1.0m positions of observation window after model babinet 1, camera angle is adjusted, before making organic glass form
Vertical plane is all placed in the range of its central region.
4th, temperature control system is adjusted：According to requirement of experiment, high temperature water storage is heated using air-heating type totally-enclosed compressor group
Water in case 6.1 is passed to through high temperature side circulating pump 5.1 in high temperature circulation water tank 4.1, the heat in high temperature circulation water tank 4.1
After the side wall of water and model babinet 1 generates heat exchange, it is back in high temperature water tank 6.1, is followed through hot water after a period of time
Ring makes the high temperature sidewall paneling constant temperature of model babinet 1, forms stationary temperature field；It will pass through air-cooled totally-enclosed pressure simultaneously
The cold water generated after contracting unit refrigeration is sent into low temperature water tank 6.2, is followed cold water feeding low temperature by low temperature side circulating pump 5.2
In ring water tank 4.2, after generating heat exchange with the side wall of model babinet 1, it is back in low temperature water tank 6.2, during through one section
Between circulating chilled water, make the low temperature sidewall paneling constant temperature of model babinet 1, form stationary temperature field.
The closeouts in ventilating duct in 1 left and right sidewall of model babinet are unscrewed, when left and right side wall surface constant temperature, record
The position of drop 4.5 in transparent horizontal duct 4.4；According to the displacement distance of drop 4.5, you can to calculate rating model babinet 1
Interior Tiny pore amount.
5th, loading and embedding sensor：By taking wheat as an example, a certain moisture content wheat is filled by density stratification in practical silo
Enter in model babinet 1, during loading, according to requirement of experiment, corresponding position is respectively arranged pressure sensor in grain heap（Layering,
Disjunction face is arranged）, temperature sensor（Layering, disjunction face arrangement）, humidity sensor（Layering, disjunction face arrangement）, loading is supreme
It spends and stops for 950 mm, make its surface horizontal, and record the pressure value under original state and epidemic disaster value.
6th, placement force air bag 8 and cover board 7：By pressure sensor according to requirement of experiment, the geotextiles being pasted under air bag
On, cover board 8 is placed, constraint reaction is provided for pressure air bag 7.By all the sensors lead in grain heap from the one of pressure air bag 8
Side is drawn, and is passed through the reserved fairlead of cover board 7 and drawn the data collecting system outside accessing.
7th, it checks and adjusts：Check sensor（Including pressure sensor, temperature sensor and humidity sensor）Whether connect
It is good, check the connection of barometric pressure servo-control system, temperature control system etc., check whether ventilated control system connects, check with
Adjust thermal-induced imagery equipment and CCD industrial cameras visual angle and fixation；Experimenter is temporarily to reduce interference.
8th, apply pressure：Barometric pressure servo-control system 10 is adjusted, pressure value is adjusted according to requirement of experiment, simulates practical grain storage
In, caused by different heap grain height inside grain heap at different location pressure value variation.
9th, ventilation experiment：Tiny pore collecting hood is removed, centrifugal fan 12 is connected with ventilation duct, ventilation duct and model
Ventilating duct connection on 1 side wall of babinet, all junctions are required to increase rubber cushion, ensure air-tightness during ventilation；Then basis
Requirement of experiment sets certain wind pressure and ventilation quantity by computer 9, and centrifugal fan is controlled by wind pressure control system 11
12 work, divulge information into model babinet 1.
10th, data record and reading：Grain heap picture is recorded by thermal-induced imagery equipment and CCD industrial cameras 3 automatically, is led to
Data collecting system is crossed, the automatic pressure value recorded in experimentation in grain heap, temperature value, humidity value.
11st, data processing：Grain heap can be handled at various pressures according to Matlab softwares, the photograph of grain heap porosity change
Piece, distinguishes grain and hole, and the porosity under grain heap different pressures, grain seed aligns rule and force ventilation
Effect.According to infrared hot digital picture, the migration velocity of air-flow in grain heap can be obtained through processing；It is moved according to water droplet in conduit
Distance, can obtain in grain medium, total Tiny pore amount generated under different action of thermal difference；It can be acquired by data collecting system
Pressure value, temperature value in experimentation in grain heap, humidity value.According to obtained data, research grain heap pressure can be fitted
Field, temperature field, moisture field, Tiny pore field multiple physical field coupling transfer law.
Claims (10)
1. a kind of grain heap multi- scenarios method experimental provision in bulk, it is characterised in that：It is used to contain grain including square structure
Open mould babinet is provided with temperature and relative humidity in the model casing body, and the forward and backward side wall of the model babinet is provided with
Observation window；
The left and right side walls of the model babinet are cavity structure, are respectively disposed with circulating water pipe inside it, described left and right
Circulating water pipe in side wall is connected respectively with external high temperature control system and low-temperature control system；
The opening of the model babinet is provided with servo flexibility Loading Control System, the servo loading control system includes
The cover board in the model box opening is withheld, the lower horizontal of the cover board is provided with pressure air bag, in the pressure gas
With being provided with pressure sensor on the contact surface of grain below capsule.
2. grain heap multi- scenarios method experimental provision in bulk according to claim 1, it is characterised in that：The high-temperature control system
Including high temperature water tank, it is provided with heating unit in the high temperature water tank, circulating water pipe in the model babinet left side wall
Entery and delivery port is connected by carrying the hot water pipeline of circulating pump with the high temperature water tank；The low-temperature control system includes
Low temperature water tank, is provided with cooling device in the low temperature water tank, in the model babinet right side wall circulating water pipe into and out of
The mouth of a river is connected by carrying the cold water pipes of circulating pump with the low temperature water tank.
3. grain heap multi- scenarios method experimental provision in bulk according to claim 2, it is characterised in that：In the left and right side walls
Outer surface is provided with insulating layer；The heating unit is air-heating type totally-enclosed compressor group；The cooling device is air-cooled complete
Closed compression unit.
4. grain heap multi- scenarios method experimental provision in bulk according to claim 2, it is characterised in that：The left and right side walls
It is tightly connected between the corresponding ventilation hole opened up on inside and outside laminate and forms ventilating duct, closeouts have been screwed on the outside of the ventilating duct.
5. grain heap multi- scenarios method experimental provision in bulk according to claim 4, it is characterised in that：In the left and right side walls
External seal is installed with Tiny pore collecting hood, and the Tiny pore collecting hood exit is connected with transparent horizontal duct, and transparent level is led
Drop is placed in pipe.
6. grain heap multi- scenarios method experimental provision in bulk according to claim 4, it is characterised in that：Wind pressure is passed through by computer
The air outlet of the centrifugal fan of control system control work is connected by ventilation duct with the ventilating duct on model wall box.
7. grain heap multi- scenarios method experimental provision in bulk according to claim 1, it is characterised in that：The pressure air bag is by phase
Mutually independent multiple blister cavities composition, the lower surface of the cover board is the compartment-type structure to match with multiple blister cavities sizes, in institute
It states and is provided with rubber pad on the faying face of blister cavities and cover board.
8. grain heap multi- scenarios method experimental provision in bulk according to claim 1, it is characterised in that：The gas of the pressure air bag
Control is adjusted by barometric pressure servo-control system by computer in pressure.
9. grain heap multi- scenarios method experimental provision in bulk according to claim 1, it is characterised in that：In the model babinet
Industrial camera is provided with outside one of observation window, thermal-induced imagery equipment is provided with outside another observation window.
10. grain heap multi- scenarios method experimental provision in bulk according to claim 1, it is characterised in that：The experimental provision is put
In constant-temperature constant-humidity environment, the constant-temperature constant-humidity environment is adjusted by constant temperature and humidity machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810141040.6A CN108227796B (en) | 2018-02-11 | 2018-02-11 | Multi-field coupling experimental device for bulk grain stack |
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| CN201810141040.6A CN108227796B (en) | 2018-02-11 | 2018-02-11 | Multi-field coupling experimental device for bulk grain stack |
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| CN108227796A true CN108227796A (en) | 2018-06-29 |
| CN108227796B CN108227796B (en) | 2023-04-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884948A (en) * | 2019-03-19 | 2019-06-14 | 辽宁省粮食科学研究所 | A kind of Multifunctional grain situation monitoring experiment system and its control method |
| 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 |
| CN112304856A (en) * | 2020-11-06 | 2021-02-02 | 国家粮食和物资储备局科学研究院 | Test device for tracking and detecting multi-factor coupling effect of grain pile and environment |
| CN113390463A (en) * | 2021-06-15 | 2021-09-14 | 河南工业大学 | Grain storage simulation multi-field coupling test platform |
| CN114216928A (en) * | 2021-11-19 | 2022-03-22 | 河南工业大学 | Simulation granary device for measuring airflow resistance and heat transfer characteristic of grain pile and measuring method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101569263A (en) * | 2009-06-01 | 2009-11-04 | 国家粮食局科学研究院 | Granary lateral ventilation method and system thereof |
| CN104007776A (en) * | 2014-05-23 | 2014-08-27 | 国家粮食局科学研究院 | Grain pile dewing early-warning, prevention and control system and method based on temperature field and humidity field coupling |
| CN105607680A (en) * | 2016-02-24 | 2016-05-25 | 北京联合大学 | Grain storage ventilation control experiment system and control method thereof |
| JP3205519U (en) * | 2016-03-17 | 2016-07-28 | 台灣尖端先進生技醫藥股▲分▼有限公司Ｔａｉｗａｎ Ａｄｖａｎｃｅ Ｂｉｏ−Ｐｈａｒｍ Ｉｎｃ | Laboratory environment control system |
| CN105843291A (en) * | 2016-05-03 | 2016-08-10 | 中国航天空气动力技术研究院 | One-storey barn heat dissipation temperature control system based on heat pipe technology |
| CN205485693U (en) * | 2016-02-24 | 2016-08-17 | 北京联合大学 | Store up grain ventilation control experimental system |
| CN105865683A (en) * | 2015-01-23 | 2016-08-17 | 航天长征火箭技术有限公司 | Grain bin pressure sensing system and grain bin reserve online monitoring and early warning system |
| CN207992849U (en) * | 2018-02-11 | 2018-10-19 | 河南工业大学 | Grain heap multi- scenarios method experimental provision in bulk |
-
2018
- 2018-02-11 CN CN201810141040.6A patent/CN108227796B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101569263A (en) * | 2009-06-01 | 2009-11-04 | 国家粮食局科学研究院 | Granary lateral ventilation method and system thereof |
| CN104007776A (en) * | 2014-05-23 | 2014-08-27 | 国家粮食局科学研究院 | Grain pile dewing early-warning, prevention and control system and method based on temperature field and humidity field coupling |
| CN105865683A (en) * | 2015-01-23 | 2016-08-17 | 航天长征火箭技术有限公司 | Grain bin pressure sensing system and grain bin reserve online monitoring and early warning system |
| CN105607680A (en) * | 2016-02-24 | 2016-05-25 | 北京联合大学 | Grain storage ventilation control experiment system and control method thereof |
| CN205485693U (en) * | 2016-02-24 | 2016-08-17 | 北京联合大学 | Store up grain ventilation control experimental system |
| JP3205519U (en) * | 2016-03-17 | 2016-07-28 | 台灣尖端先進生技醫藥股▲分▼有限公司Ｔａｉｗａｎ Ａｄｖａｎｃｅ Ｂｉｏ−Ｐｈａｒｍ Ｉｎｃ | Laboratory environment control system |
| CN105843291A (en) * | 2016-05-03 | 2016-08-10 | 中国航天空气动力技术研究院 | One-storey barn heat dissipation temperature control system based on heat pipe technology |
| CN207992849U (en) * | 2018-02-11 | 2018-10-19 | 河南工业大学 | Grain heap multi- scenarios method experimental provision in bulk |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884948A (en) * | 2019-03-19 | 2019-06-14 | 辽宁省粮食科学研究所 | A kind of Multifunctional grain situation monitoring experiment system and its control method |
| 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 |
| CN112304856A (en) * | 2020-11-06 | 2021-02-02 | 国家粮食和物资储备局科学研究院 | Test device for tracking and detecting multi-factor coupling effect of grain pile and environment |
| CN113390463A (en) * | 2021-06-15 | 2021-09-14 | 河南工业大学 | Grain storage simulation multi-field coupling test platform |
| CN113390463B (en) * | 2021-06-15 | 2023-01-24 | 河南工业大学 | Grain storage simulation multi-field coupling test platform |
| CN114216928A (en) * | 2021-11-19 | 2022-03-22 | 河南工业大学 | Simulation granary device for measuring airflow resistance and heat transfer characteristic of grain pile and measuring method |
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