CN205246591U - Cereal water analysis appearance and grain drying system - Google Patents
Cereal water analysis appearance and grain drying system Download PDFInfo
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- CN205246591U CN205246591U CN201521139402.6U CN201521139402U CN205246591U CN 205246591 U CN205246591 U CN 205246591U CN 201521139402 U CN201521139402 U CN 201521139402U CN 205246591 U CN205246591 U CN 205246591U
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Abstract
The utility model relates to a cereal water analysis appearance, including hopper, plastic slab, sensor plate, bottom plate, bottom plate motor, control circuit, wherein, the hopper is vertical to be placed, and hopper open -top just receives cereal, and the bottom of hopper is sealed by the bottom plate, the bottom plate is opened and is closed under the drive of bottom plate motor the hopper, it has a fluting to open on at least one lateral wall of hopper, and the plastic slab is embedded into in this fluting, sensor plate is pasting the plastic slab and is arranging in the outside of hopper just insulatingly with the hopper, hopper and sensor plate make by the current conducting plate, and have constituted the positive pole and the negative pole of the cereal water analysis appearance of capacitanc. This application still relates to the grain drying system.
Description
Technical field
Grain moisture analyzer and cereal that the utility model relates in a kind of cereal continuous drying process are driedSystem.
Background technology
Grain drying is the elementary object that grain stores. Dry not grain exists easily and rots, evenCause fire equivalent risk.
In the dry run of grain, in grain, the detection of moisture is exactly a necessary task.
Tradition Grain Drying Process moisture on-line detects the methods such as capacitance method or electric-resistivity method that adopt more and detects, nearPhase is domestic, and there is the recent studies on and the trend that adopt weight to carry out online water content detection and control in oneself also.
It is to utilize the dependency relation between grain moisture and its resistance value that electric-resistivity method moisture on-line detects principleIndirect determination grain moisture, moisture high resistance is little, and moisture low resistance is large. At Cirulation type grain dryer oneAs use resistance-type moisture transducer to detect online, be conventionally arranged on the elevator cylinder side of drying machineWall, the cereal-granules from the elevator bucket of elevator is scattered is constantly scattered into a pair of counterrotating roller,Roller is pair of electrodes, when grain is pulverized during by roller, measures material between circular electrode simultaneouslyResistance variations curve; The extraction of the cereal-granules resistance variations eigenvalue of curve to some is also rolledMoving statistics, obtains its mean value; According to this mean value and moisture correlation function relation (having demarcated in advance),Solve the moisture value of cereal; The finally control of dry run implementation goal or the mistake to cereal according to moisture valueProcess control.
The shortcoming that existing electric-resistivity method moisture on-line detects is: 1. inhomogeneous when grain moisture, contain moreWhen blue or green grain, immature kernel, error detection value is larger; 2. complex structure, fault is many; 3. when material has stoneWhen the foreign matter, easily stop up at roller place, damage roller; 4. can only adaptive character, paddy that granularity is closeThing, as paddy and wheat, when cereal type change, sensor will be done large change, that is to say, specifically inspectionSurvey instrument and can only detect specific cereal type, for various types of grain, versatility is poor; 5. be detectedCereal is all damaged and cannot preserve or use, and belongs to and damages detection: the 6. detection of high moisture grains moisturePrecision is low.
It is that the dependency relation of applying between grain moisture and electric capacity is come indirectly that capacitance method moisture on-line detects principleMensuration grain moisture, moisture high capacitance is large, and the low electric capacity of moisture is little. At present, cereal automatic drier is adoptedWhile using capacitance-type sensor for moisture content, be generally the tubular article with a fortune capacity, be arranged on Cirulation type grainIn the delay section inside or outlet grain stream of drying machine, grain stream is through capacitor plate, according to grain moisture content notSame its dielectric property is just different, and the variation of measuring moisture content. Realize the detection to moisture, then pass throughSecondary meter or host computer are adjusted the dry control of cereal according to grain moisture value.
The shortcoming that existing capacitance method moisture on-line detects is: 1. install and overhaul inconvenience; 2. detect essenceDegree is subject to the impact of environment and cereal humiture, cereal density, grain flow rate large; 3. when cereal is impureWhen high, monitor error large.
In addition, applicant also knows two kinds of capacitance method moisture detectors. A kind of is the electric capacity of hand-heldMethod moisture detector, the shortcoming of this detector is to be directly connected with the circuit of crop dryer, needsVery important person carrys out manual operation. In addition, this detector need to coordinate specific measuring cup, to pack into just in timeThe cereal of quantity. The spring controlled base plate of measuring cup bottom can be opened in side direction spring, to make cereal sameTime fall into hand-held tester (if not so, pour cereal the mode of detector into but adopt,Can cause larger measure error). In addition, in the time containing more impurity in cereal, the measurement meeting of detectorBe affected.
Another kind is at capacitance method on-line detector, and itself and crop dryer are used in conjunction with. Examine online at thisSurvey in instrument, the positive pole of capacitor board, negative pole alternately vertically arrange, and cereal is continual passing through from top to bottomSpace between positive pole and the negative pole of capacitor board. But this on-line detector has following shortcoming: 1, byAll to be exposed in mobile moist cereal in both positive and negative polarity, therefore cereal by meeting affect both positive and negative polarity itBetween capacitance characteristic, if contain the conductive impurity of iron wire class in cereal, easily make capacitor board short circuit;2, secondly, the cereal that long-term use can cause capacitor board to be passed through in a large number grinds to obtain attenuation, cause capacitor board itBetween capacitance characteristic further change, and the variation of this capacitance characteristic be difficult to calibration; 3, due to paddyThing is longilineal and capacitor board itself is also longilineal, at the upper and lower side place of capacitor board, and cereal and electricityThe contact pattern that holds plate also can have influence on the degree of accuracy of capacitance measurement, for example, and the tip of cereal and capacitor boardThe electric capacity of upper end in contact be just different from the electric capacity of the elongated sides of cereal and the upper end in contact of capacitor board, because ofThis, such uncertainty has further caused the inaccurate of capacitance measurement.
The principle that gravimetric method moisture on-line detects is that in application units' volume, the material of different in moisture content hasDifferent weight is carried out the method for water content detection or is known at oneself under the condition of initial moisture, passes through weight reducingCalculate the method for the real-time online moisture of cereal. Weight detecting method exists precision high and good stabilityAdvantage, installs the not convenient and difficult shortcoming of eliminating of dynamic error but also exist. China's application number is01310682597.8 and 201410052968.9 Patent Application Publication the cereal circulation based on total re-detectionDry moisture online monitoring method method and system thereof, disclose a kind of weight detecting real-time online that utilizes and detectedMethod.
Utility model content
The grain moisture that provides a kind of improved capacitance method moisture on-line to detect is provided the purpose of this utility modelAnalyzer and grain drying system.
According to an embodiment, a kind of grain moisture analyzer, comprise hopper, plastic plate, sensor board,Base plate, base plate motor, control circuit, wherein, hopper is vertically placed, and hopper open top, for connecingReceive cereal to be measured, the bottom of hopper is sealed by base plate, and described base plate is under the driving of base plate motorOpen and close described hopper; On at least one sidewall of hopper, have a fluting, plastic plate is embedded intoIn this fluting; Sensor board is pasting plastic plate and is being arranged in the outside of hopper and insulate with hopper; Hopper and biographySensor plate is made by conductive plate, and has formed positive pole and the negative pole of capacitive grain moisture analyzer.
According to a preferred embodiment, sensor board and plastic plate are of similar shape, described shapeRectangle, circle or ellipse.
According to a preferred embodiment, plastic plate blocks described fluting, so that the inner surface of hopper is flatSliding mode is embedded in described fluting.
According to a preferred embodiment, the length of side of sensor board is greater than the length of side of described fluting.
According to a preferred embodiment, the described fluting of hopper is apart from the pre-spacing in one, top of this hopperFrom.
According to a preferred embodiment, the hopper edge above this fluting offers at least one ventilationHole, accumulate cereal in hopper during, the top blowing by air vent to hopper, thereby by shrivelledGrain and impurity blow out hopper.
According to a preferred embodiment, in control circuit, the circuit part that is connecting sensor board sets up separatelyBe equipped with antistatic switch; In the time not starting to measure, the circuit that described antistatic switch connects sensor boardPartial earthing; And in the time starting to measure, circuit part's tap that described antistatic switch connects sensor boardEnter the computing unit to control circuit.
According to a preferred embodiment, at the top center of the hopper slit that suspended, cereal passes throughSlit drops in hopper.
According to a preferred embodiment, this grain moisture analyzer also comprises insulation board, this insulation board withAforesaid plastic plate is clipped in sensor board wherein.
According to a preferred embodiment, this grain moisture analyzer be placed on grain drying system underAuger place or be positioned over the sidewall of elevator.
According to a preferred embodiment, a kind of grain drying system comprises drying machine main body, elevator, drumBlower fan, signal test and conversion unit, control display unit, humiture probe group, enter grain elephant trunk, underAuger, is characterized in that, also comprises grain moisture analyzer.
By the utility model, realize following beneficial effect:
1, the application's grain moisture analyzer can be combined use with grain drying system, and hasHigh certainty of measurement;
2, because hopper inner side is level and smooth, avoided the wearing and tearing of plastic plate, also made between capacitor plateDielectric constant can not change, thereby further improved certainty of measurement;
3, be greater than the length of side of described fluting due to the length of side of sensor board, therefore effectively prevented sensorPlate is not aimed at the error that causes or completely due to sensor board the caused error of expanding with heat and contract with cold;
4, because the upper edge of hopper is provided with at least one air vent, can dispel not full paddyComposition granule and impurity, therefore further improved certainty of measurement;
5, owing to being provided with antistatic switch in control circuit, therefore protected the safety of control circuit,Extend the service life of grain moisture analyzer.
All the other technique effects of the application will further be discussed in detailed description of the invention.
Brief description of the drawings
By below in conjunction with accompanying drawing, embodiment being described, above-mentioned feature of the present utility model and technologyAdvantage will become apparent and easily understands.
Fig. 1 a-Fig. 1 d is the structure chart of a preferred embodiment of grain moisture analyzer, wherein, and Fig. 1 aBe bottom view, Fig. 1 b is stereogram, and Fig. 1 c is a side view, and Fig. 1 d is another side view.
Fig. 2 a-Fig. 2 b is the side view of the opening and closing of the base plate of grain moisture analyzer, wherein, and figure2a demonstrates base plate and closes, and Fig. 2 b demonstrates base plate and opens.
Fig. 3 be fluting in another preferred embodiment of grain moisture analyzer, plastic plate, sensor board,The exploded view of insulation board.
Fig. 4 is the overall schematic of grain drying system.
Fig. 5 a and Fig. 5 b are the schematic diagrames that grain moisture analyzer is positioned at the lower auger place of grain drying system.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is done to further detailed description.
In the following description, only by the mode of explanation, some example embodiment of the present utility model is enteredLine description, unquestionable, those of ordinary skill in the art can recognize, is not departing from this practicality newlyIn the situation of the spirit and scope of type, can revise described embodiment with various different modes.Therefore, accompanying drawing and be described in just illustrative in essence, instead of for limiting the protection of claimScope.
With reference to figure 1-Fig. 3, grain moisture analyzer 100 comprise hopper 1, plastic plate 2, sensor board 3,Base plate 4, base plate motor 5, control circuit 6, wherein, hopper 1 can vertically be placed, hopper 1 topOpening, for receiving cereal to be measured, the bottom of hopper 1 is sealed by base plate 4, and base plate 4 is the end of atUnder the driving of board motor 5, open and close described hopper. On at least one sidewall of hopper 1, have oneFluting, plastic plate 2 is embedded in this fluting; Sensor board 3 is pasting plastic plate 2 and is being arranged in hopper 1Outside and insulate with hopper 1; Hopper 1 and sensor board 3 are made by conductive plate (conductive material),And positive pole and the negative pole of capacitive grain moisture analyzer are formed. Because being embedded into this, opens plastic plate 2In groove, the inner surface that therefore makes whole hopper 1 is level and smooth, thereby can not produce accumulation with cerealFriction, has avoided the wearing and tearing of hopper 1 with plastic plate 2.
Hopper 1 can be column tubular, and plastic plate 2 can be rectangle with sensor board 3. In addition,Plastic plate 2 can be also other shape with sensor board 3, such as circular, oval etc. Hopper 1 HeSensor board 3 all can be made of metal, and formed condenser type water analysis instrument anodal capacitor board andAnd/or negative pole capacitor board. Control circuit 6 is made up of PCB circuit board, comprises CPU (single-chip microcomputer), numberAccording to transport module, water content detection module, digital display module etc. Grain moisture analyzer 100 is all rightComprise display circuit 7, display circuit 7 is connected to control circuit 6, for showing that detection number of times, moisture containThe numerical value such as amount.
As a preferred embodiment, plastic plate 2 comprises inner panel and outer ring plate, wherein, and outside inner panel quiltRing flat-plate surrounds, and inner panel is the direction projection to the fluting on hopper 1 sidewall with respect to outer ring plate, projectionThickness is approximately 1-2 millimeter, but as to protruding restriction, and this projection is with the sidewall of hopper 1Thickness equates for the best, so that plastic plate 2 is just in time stuck in fluting place. In the time that inner panel is stuck in fluting place, outerRing flat-plate fits with the sidewall outside (holding the relative opposite side of cereal) of hopper 1. The fixing side of laminatingFormula can be multiple selection of the prior art, does not do concrete restriction at this. For example, the limit of outer ring plateAlong can there are multiple circular holes, for holding, plastic plate 2 entirety are fixed on to the spiral shell on the sidewall of hopper 1Nail.
As a preferred embodiment, the length of side of sensor board 3 is preferably more than on hopper 1 sidewallThe length of side of fluting. The benefit of doing is like this, the relative area between both positive and negative polarity electric capacity is remained unchanged,Even in the situation that expanding with heat and contract with cold or in the situation that sensor board is not aimed at completely with fluting, also canEnsure that the polar plate area between hopper 1 and sensor board 3 remains unchanged, thereby prevent due between pole plateThe variation of the polar plate area of not aiming at completely or cause due to the reason such as expand with heat and contract with cold.
Have a slit in the top center of hopper 1, cereal flows into hopper 1 lentamente from this slit, therebyEnsure the accuracy of measuring. In the time not carrying out moisture measurement, base plate 4, in open mode, makes cerealBy this water analysis instrument 100; In the time measuring, base plate 4 is closed under the driving of base plate motor 5,Cereal is accumulated in hopper 1, until after the whole region of the full plastic plate 2 of cereal lid, just startThe measurement of grain moisture. In current setting, after base plate 4 is closed, cereal approximately needs 2 points of bells fullHopper 1; Certainly, those skilled in the art will know that this filling time of cereal is adjustable, not structureThe application's restriction in pairs, as long as ensure that cereal evenly falls, thereby ensures the precision of measuring.
As a preferred embodiment, can be provided with in the interior position near base plate motor 5 of hopper 1Temperature sensor, for measuring the grain temperature in hopper 1. This temperature sensor can be preferably oneIndividual cylindric nib type, diameter is 5mm preferably. In order to prevent that the foreign matters such as weeds from hanging over this temperature sensorUpper and cannot together slip down along with cereal, thus cause residual, preferably this temperature sensor with toThe mode having a down dip is inserted in hopper 1. Preferably, this temperature sensor is with downward-sloping miter angleMode is inserted in hopper 1.
Because tested cereal lid has been expired the region of whole plastic plate 2, be therefore equivalent to as both positive and negative polarity electricityBetween the hopper 1 of appearance plate and sensor board 3, be full of cereal, measurement can obtain more accurately like thisResult. If cereal fails to cover the region of whole plastic plate 2, even if know that the concrete ratio of covering is (allAs, covering 50%, covering 70% etc.), also cannot obtain measurement result accurately.
In the time that measurement completes, base plate 4 is opened, and cereal is fallen, and completes one and measures circulation.
After the whole region of cereal plastic covering plate 2, can start to measure, capacitance variations is passed through sensingThe metallic rod that device plate 3 centers are connecting is delivered to control circuit, thereby carries out electric capacity calculating, obtains thusThe measured value of the moisture of tested cereal. As an examples of circuits, and unrestricted, moisture height electric capacity is large,The low electric capacity of moisture is little.
As a preferred embodiment, the fluting of hopper 1 can be predetermined apart from one, the top of hopper 1Distance, when too high to avoid slotting, cereal is accumulated cannot the corresponding plastic plate 2 of this fluting of uniform fold,Thereby coming out, two drift angles that make plastic plate 2 do not have cereal to cover.
In addition, can also above this fluting, offer at least one air vent 11, in hopper 1, accumulateDuring cereal, the top blowing by air vent 11 to hopper 1, thus shrivelled grain and impurity are blownDischarge bucket 1, to avoid these impurity effect measurement results.
As a preferred embodiment, in control circuit 6, connecting the circuit part of sensor board 3Divide and be provided with antistatic switch; In the time not starting to measure, described antistatic switch connects sensor board 3Circuit part ground connection, thereby avoid the electric capacity accumulation at capacitor board place; And in the time starting to measure, described anti-The circuit part that static switching connects sensor board 3 is linked into the computing unit of control circuit 6, therebyMeasure. Such circuit structure has further strengthened the accuracy of measuring, and has avoided controlling electricity simultaneouslyThe damage on road 6, has extended service life of whole grain analyzer, has also ensured at cereal dry simultaneouslyContinuous measurement in the non-stop-machine situation of machine.
As a preferred embodiment, this grain moisture analyzer also comprises insulation board 22, this insulation board22 are clipped in sensor board 3 wherein with aforesaid plastic plate 2, to improve insulation effect. Insulation board 22 canTo there is identical material and shape with plastic plate 2, also can have the material different from plastic plate 2 andShape, as long as can reach the application's object, just can not form the restriction to the application.
As a preferred embodiment, grain moisture analyzer can also comprise display circuit, temperature controlThe existing parts such as system and testing circuit, these parts, as known technology, do not repeat them here.
As a preferred embodiment, the method for carrying out grain moisture analysis comprises the steps: to closeBase plate 4, makes to cover gradually plastic plate 2 by the cereal of hopper 1; Utilize capacitance method in hopper 1The moisture of cereal measure; After measurement completes, open base plate 4, cereal is fallen.
Referring to Fig. 4 and Fig. 5 a-Fig. 5 b, a kind of continous way grain drying system comprise drying machine main body 200,Elevator 300, air blast 400, signal test and conversion unit (not illustrating in the drawings), control showUnit (not illustrating in the drawings), humiture probe group (not illustrating in the drawings), enter grain elephant trunk 500, lower strandDragon 600 etc. As a preferred embodiment, the grain moisture analyzer in above-mentioned multiple embodiment100 also can be included in this grain drying system.
When drying operation, cereal to be dried is raised machine and rises to the top of drying machine main body, by entering grainElephant trunk enters in drying machine main body, and cereal to be dried is dried in drying machine main body, falls layer by layerArrive in the storehouse at lower auger place of drying machine operating system bottom, and by lower auger, cereal is transported to and is carriedThe bottom of the machine of liter, thus the machine that is again raised promotes, and realizes the cyclic drying of cereal. Lower auger in Fig. 5 aThe arrow left of 600 tops is being indicated wind-force direction, and the particle of grain moisture analyzer 100 tops representsCereal falls and drops in grain moisture analyzer 100.
Grain drying system also comprises control circuit, and control circuit is for monitoring and control whole operating systemOperation, and by control display unit effective information is shown to operator, check and remember to facilitateRecord. Because grain drying system is technology contents known in those skilled in the art, therefore at this no longerRepeat.
By detecting grain moisture or moisture rate of change, can manual adjustments or automatic control and adjustmentCereal running speed and/or baking temperature, change and cereal running speed and/or baking temperature grain moistureAdapt. Nonrestrictive for instance exemplary, if grain moisture rate of drying is slow, reduce cerealRunning speed and/or increase baking temperature; If grain moisture rate of drying is too fast, increase cereal running speedDegree and/or reduction baking temperature. Preferred as one, the automatic control of cereal running speed and/or baking temperatureSystem strategy can adopt traditional pid control mode.
When water analysis instrument above-mentioned the application is incorporated in this drying system, the control of water analysis instrumentCircuit 6 also can be electrically connected with the control circuit of system, thereby shows to operator in more integrated modeInformation.
As a preferred embodiment, can consider water analysis instrument to be placed on the dry system automatically of cerealMultiple positions of system, such as, can place it in the sidewall of elevator, also can place it in downAuger place.
Under above-mentioned instruction of the present utility model, those skilled in the art can be on the basis of above-described embodimentOn carry out various improvement and distortion, and these improvement and distortion all drop on protection domain of the present utility modelIn, it will be understood by those skilled in the art that above-mentioned specific descriptions just explain the utility model betterObject, protection domain of the present utility model is limited by claim and equivalent thereof.
Claims (11)
1. a grain moisture analyzer, comprises hopper, plastic plate, sensor board, base plate, base plate motor, control circuit,
Wherein, hopper is vertically placed, hopper open top and reception cereal, and the bottom of hopper is sealed by base plate, and described base plate opens and closes described hopper under the driving of base plate motor;
On at least one sidewall of hopper, have a fluting, plastic plate is embedded in this fluting;
Sensor board is pasting plastic plate and is being arranged in the outside of hopper and insulate with hopper;
Hopper and sensor board are made by conductive plate, and have formed positive pole and the negative pole of capacitive grain moisture analyzer.
2. grain moisture analyzer according to claim 1, is characterized in that, sensor board and plastic plate are of similar shape, and described shape is rectangle, circle or ellipse.
3. grain moisture analyzer according to claim 1, is characterized in that, plastic plate blocks described fluting, is embedded in described fluting so that the inner surface of hopper is level and smooth mode.
4. grain moisture analyzer according to claim 1, is characterized in that, the length of side of sensor board is greater than the length of side of described fluting.
5. grain moisture analyzer according to claim 1, is characterized in that, the described fluting of hopper is apart from one, the top preset distance of this hopper.
6. grain moisture analyzer according to claim 1, it is characterized in that, the hopper edge above this fluting offers at least one air vent, accumulate cereal in hopper during, top blowing by from air vent to hopper, thus shrivelled grain and impurity are blown out to hopper.
7. grain moisture analyzer according to claim 1, is characterized in that, in control circuit, the circuit part that is connecting sensor board is provided with antistatic switch; In the time not starting to measure, the circuit part ground connection that described antistatic switch connects sensor board; And in the time starting to measure, the circuit part that described antistatic switch connects sensor board is linked into the computing unit of control circuit.
8. grain moisture analyzer according to claim 1, is characterized in that, at the top center of the hopper slit that suspended, cereal drops in hopper by slit.
9. grain moisture analyzer according to claim 1, is characterized in that, this grain moisture analyzer also comprises insulation board, and this insulation board and aforesaid plastic plate are clipped in sensor board wherein.
10. grain moisture analyzer according to claim 1, is characterized in that, this grain moisture analyzer is placed on the lower auger place of grain drying system or is positioned over the sidewall of elevator.
11. 1 kinds of grain drying systems, comprise drying machine main body, elevator, air blast, signal test and conversion unit, control display unit, humiture probe group, enter grain elephant trunk, lower auger, it is characterized in that, also comprise grain moisture analyzer as claimed in any one of claims 1-9 wherein.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521139402.6U CN205246591U (en) | 2015-12-31 | 2015-12-31 | Cereal water analysis appearance and grain drying system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521139402.6U CN205246591U (en) | 2015-12-31 | 2015-12-31 | Cereal water analysis appearance and grain drying system |
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| CN205246591U true CN205246591U (en) | 2016-05-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247076A (en) * | 2017-05-31 | 2017-10-13 | 合肥艾瑞德电气有限公司 | A kind of online moisture analyser |
| CN108732208A (en) * | 2018-05-22 | 2018-11-02 | 上海交通大学 | A kind of Crop moisture sensor and the method for measuring grain moisture |
-
2015
- 2015-12-31 CN CN201521139402.6U patent/CN205246591U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247076A (en) * | 2017-05-31 | 2017-10-13 | 合肥艾瑞德电气有限公司 | A kind of online moisture analyser |
| CN108732208A (en) * | 2018-05-22 | 2018-11-02 | 上海交通大学 | A kind of Crop moisture sensor and the method for measuring grain moisture |
| CN108732208B (en) * | 2018-05-22 | 2020-11-06 | 上海交通大学 | Grain moisture sensor and method for measuring grain moisture |
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