CN107684847A - The more component proportioning materials methods of screw - Google Patents
The more component proportioning materials methods of screw Download PDFInfo
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- CN107684847A CN107684847A CN201710895903.4A CN201710895903A CN107684847A CN 107684847 A CN107684847 A CN 107684847A CN 201710895903 A CN201710895903 A CN 201710895903A CN 107684847 A CN107684847 A CN 107684847A
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- Prior art keywords
- blanking
- component
- screw
- bin
- speed
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/881—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise by weighing, e.g. with automatic discharge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7176—Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/71775—Feed mechanisms characterised by the means for feeding the components to the mixer using helical screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/79—Preventing lumping, or comminuting lumps, during feeding or discharging, e.g. by means of vibrations, or by scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/882—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances
- B01F35/8821—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances involving controlling
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention discloses the more component proportioning materials methods of screw, controller carries out the blanking demarcation of each component material, prediction is iterated to the air weighting of its blanking respectively by controlling the operating of auger conveyor and reading the sensing data of Weighing module in real time；Also by adjust feed pump rotating speed blanking bin Level control in a smaller range；And the shut-in time to comparing auger conveyor based on accumulation discharge quantity and formulation data carries out dynamic regulation.The blanking successively of each component material, when the material in detecting blending bucket reaches setting value, push pedal is opened after material is well mixed, discharges compound.The present invention reduces the change that material is distributed and impacted in blanking process using range sensor, vibrating arm and tripper, accelerates iteration prediction convergence rate, higher blanking velocity is obtained while precision is ensured, and suitable for the quick dispensing of small lot.
Description
Technical field
The present invention relates to quantitative ingredient field, and in particular to a kind of more component proportioning materials methods of screw.
Background technology
In industrial or agricultural manufacture and commodity packaging, there is substantial amounts of powder grain material, as polypropylene, polystyrene, polyvinyl chloride,
The building materials raw materials such as industrial chemicals, quartz sand, cement such as light methylcellulose, polyacrylonitrile, epoxy powder coating, washing powder
Deng daily chemical product, the corn bean agricultural products such as millet, soybean, or powder, slag, granular processed food, feed, chemical fertilizer, agricultural chemicals
Automatic quantitative packing or dispensing are required to Deng agricultural production material, and the health products of granular, Chinese and Western medicine, flavouring etc.
Manufacture.
China has many enterprises still to use manual quantitative ingredient or packaging at present, and one side labor intensity is big, speed
Slowly, deficiency in economic performance；On the other hand, food, medicine etc. quantitatively tend not to meet hygienic requirements, poisonous and hazardous thing by hand
Material, artificial participation is quantitative easily to be damaged to human body.Therefore for manufacturing enterprise, be badly in need of provide cost it is relatively low but with compared with
High-speed and more component automatic ration blanking dispensing equipments of the degree of accuracy, meet substantial amounts of material dosing packaging or dispensing manufacture
It is required that.
Powder grain material automatic ration dispensing blanking common method has two kinds both at home and abroad at present, positive displacement and Weighing type.Volume
Formula quantitative basis material volume is carried out measuring filling or fed intake, and is quantitatively fed intake rapid, but quantitative quality of material is close by material
Degree changes and changed.To improve cutting stock precision, there are a variety of adjusting methods, such as the China of Application No. 201320001933.3
Patent, frequency control is used to screw rod, slowed down gradually rate of feeding close to desired value, reduce falling down error value；Application No.
201310234280.8 Chinese patent, divided in soda ash packing machine three-speed frequency conversion feeding process using big small screw under the multistage
Material；The Chinese patent of Application No. 200920248298.2 is considered unmanageable quantitatively and by first quick and back slow during fast blanking
Method come reduce feed drop influence；The blanking final value of these non-Weighing type schemes can only be close to desired value, and the degree of accuracy is not
It is high.
The secondary amounts of material one set by Weighing type quantitative basis is carried out measuring filling or fed intake, it is necessary in blanking process
Constantly weigh, according to weighing results feedback control discharge quantity, due to weigh by blanking impact and aerial hysteresis material influenceed compared with
Greatly, component blanking velocity and precision all suffer from many difficulties.In order to compensate interference of the aerial material to measuring accuracy, many schemes
Using the technology for closing valve in advance, as batching weighing process is divided into by the Chinese patent of Application No. 201410230888.8
Three phases, and controlled quentity controlled variable is shifted to an earlier date to calculate to close using iterative learning control mode in the last stage, but the program is only
The cutting stock precision after the completion of study can be improved, the accumulation cutting stock precision in learning process can not then ensure.
The content of the invention
Simple screw feed appliance belongs to positive displacement quantitative category, and positive displacement quantitative filling measures filling based on volume
The quantity of material, its is simple in construction, and cost is low, but quantitative filling speed stability and precision depend on the stabilization of material apparent gravity
Property, had a great influence by physicochemical properties such as material loosening degree, particle uniformity coefficient, hygroscopicity.
From principle, at present positive displacement quantitative filling can be divided into control attal flow or the time and
Material both types are measured with identical measuring container.The former is frequently with the time of vibration or control spiral shell for controlling oscillating feeder
The rotational time of rotation filling machine realizes quantitative filling；The latter is with quantitative filling machine of measuring cup, graduated cylinder or plunger etc..No matter use that
A kind of filling of positive displacement quantitative, have one it is common the problem of, seek to make as far as possible the apparent gravity of material stable.
Because common positive displacement is substantially conversion formula, no image of Buddha Weighing type equally grasps the definite quality of blanking, after
Although to occur finishes the scheme for being collectively referred to as weight, can only be sent due to the prediction of no air weighting by blanking final stage is extremely low
Speed is expected to ensure precision.
Therefore, patent of the present invention is carried out while dynamic weighing detection is combined with screw feeding device to blanking process
Improve, reduce the change of compactness and material falling down error in material silo, and by being predicted in iteration by error current and
For accumulated error as controlled volume, dynamic adjusts the operating speed in auger conveyor dwell time and last stage in blanking process
Degree, so as to obtain higher average operating speed while precision is ensured, general screw baiting method is avoided most
The problem of stage operating is especially slow afterwards.
The technical solution of the present invention is to provide a kind of more component proportioning materials methods of screw, and it includes following step
Suddenly：
S1, according to a secondary amounts and each formula rate, determine a discharge quantity Ws of each component, the accumulation blanking to each component
Error E assigns initial value 0；Current component is set as the first component；
S2, the blanking since blanking bin to current component, controller read the sensed values of the Weighing module of support weighing hopper,
The initial weight G0 of weighing hopper is recorded, starts auger conveyor and with μ amaxAcceleration accelerates, when speed reaches vH=λ vR
When keep speed it is constant, record start the moment be t0；
Wherein, amaxFor the specified peak acceleration of screw rod of auger conveyor, vRFor maximal rate, μ be (0.5~0.9) it
Between acceleration factor, velocity coeffficients of the λ between (0.85~1.0)；
S3, when detecting that weighing hopper weight reaches (G0+Ws-Wa-0.5 λ dts) when, begin to shut off helical feed
Device and with μ amaxAcceleration reduces speed now, until stopping；
Wherein, Wa is air weighting predicted value, the blanking speed of auger conveyor, t when d is operated for screw rod with maximal rates
For from the moment that reduces speed now to the time span between the stop timing, ts=λ vR/μ·amax；
S4, wait material to drop down onto weighing hopper down completely, read the sensed values of Weighing module, obtain currently practical discharge quantity
Wr, calculate this drafting error e=Wr-Ws；
S5, renewal accumulation drafting error E '=E+e, calculate air weighting predicted value Wa '=Wa+ (α e+ β E '), wherein, α and β
Respectively the iteration coefficient of section (0,1) and there is alpha+beta=1；
S6, iteration, make E=E ', Wa=Wa ', are that the blanking next time of this component prepares；
S7, blanking component is changed, if whole component blankings finish, turn in next step, otherwise, to go to step S2；
S8, the discharge valve for opening weighing hopper bottom so that a formula ratio material of more component material compositions falls into batch mixing
Bucket, reads the state of level sensor in blending bucket, if detecting, material position exceedes given threshold, blender in order blending bucket
Stirring, after more component materials are well mixed, the push pedal of blending bucket bottom is opened, mixed material is exported from conveying pipeline；
If S9, default blanking batch have been completed, terminate blanking；Otherwise, component is set as the first component, turned
Step S2.
Preferably, before the step S1, also following steps：
T1, by test experiment, the range sensor in Weighing module and blanking bin is demarcated；
T2, parameter setting, including a secondary amounts, formula table, batch value, blanking speed mark are carried out by the touch-screen of controller
Fixed duration Tb and number of repetition, stably weigh delay Td；
T3, blanking demarcation is carried out to each component：Operated since 0 moment by the speed governing curve of even acceleration-constant speed-even deceleration
Auger conveyor certain time length Tb, at the Tb+Td moment after closing auger conveyor Tb moment and stabilization of weighing, read respectively simultaneously
Record the gravimetric value Wcb and Wdb of Weighing module；After repeatedly, the blanking speed d and air weighting initial value Wa of this component are calculated
=AVG (Wdb-Wcb).
It is preferably, further comprising the steps of：
Step S1 also includes：Sorted from big to small by discharge quantity Ws of each component value, determine the blanking time of each component
Sequence；
Step S3 also includes：As time t >=t0+0.85Ws/d, controller is forbidden all outer in addition to security response
Interrupt in portion；
Step S8 also includes：Blender discontinuously one small fan angle of multiple rotary, the state of level sensor is again read off,
If still material position exceedes given threshold, batch mixing stirring is just carried out.
It is preferably, further comprising the steps of：
The range sensor that rotation is located in blanking bin on the drift angle of nearly frame central carrys out detectable substance burden distribution, and passes through
Weighing module carries out real-time tracking to blanking speed, when discovery blanking bin material EDS maps exceed setting range, or discovery list
After time blanking rate fluctuation in position exceedes given threshold such as 5%, control order is fixed on frame and close to blanking bin side wall
Vibrating arm acts, and adjusts the solid accumulation form in blanking bin.
Preferably, being provided with storage bin and feed pump above the blanking bin, the feed pump is screw feed pump, its
There is a material shower nozzle outlet of rear end feed pipe, and the material shower nozzle is spherical, and its surface distributed has circular aperture, described
Charging revolution speed is controlled by such as following formula：
Wherein, VEnter 0For a setting maximum feed velocity, l is the current material position of blanking bin, LMAnd LmRespectively it is default most
High, minimum blanking bin material position.
Preferably, setting a tripper on the top of weighing hopper, the tripper is that cone bottom is pressure in top
The hourglass shape tripper of flat cone structure, its top are opening shape, and then only there is slope shape spray bottom at the both ends of length direction
Mouth；The weighing hopper is raised towards spherical crown shape sub-material straggly is distributed with the direction of the nozzle, and material is through sub-material during blanking
The material heap that device nozzle and sub-material projection are fallen into weighing hopper.
Preferably, a pumping board is arranged at the blanking bin bottom；The auger conveyor include screw case, conveying screw rod,
Connector and motor, the motor housing are connected by connector with screw case, and the conveying screw rod in screw case passes through axle
Set is connected with motor shaft, and with respect to there is a charging aperture at blanking bin bottom opening, screw case is relative with motor for screw case upper surface
The other end is also associated with a tremie pipe placed vertically, opens pumping board during blanking, material passes through from the opening of blanking bin bottom
Auger conveyor is fallen on the material heap in weighing hopper to tremie pipe, then through tripper.
Preferably, the vibrating arm include being sequentially connected pillar, head, vibrator, shake bar, the vibrator bottom
There is a spring buffer, the bar surface distributed of shaking has particle raised, the vibrator starting of oscillation and bar that shakes does snakelike stir when vibrating arm acts
It is dynamic.
Using distribution of the present invention, compared with prior art, there is advantages below：Distance-sensing is respectively adopted in the present invention
Device and rotatable vibrating arm are detected and adjusted to the solid accumulation form in blanking bin, ensure that material compacting degree is stable；Again
Reduce the change of material falling down error and buckles by setting tripper in weighing hopper, the convergence of iteration prediction can be accelerated
Speed；By the control to blanking accumulated error in the iteration prediction measured in the air so that the blanking energy quilt in learning process
Effectively utilize, avoid material waste；Simultaneously because the convergence of iteration prediction so that screw rod can be kept higher in blanking process
Running speed, improve blanking efficiency.
Brief description of the drawings
Fig. 1 is the composition structure chart of the more component proportioning materials devices of screw；
Fig. 2 is the shape assumption diagram of the more component proportioning materials devices of screw；
Fig. 3 is material dropping process schematic diagram；
Fig. 4 is storage bin and blanking bin partial structural diagram；
Fig. 5 is material position schematic diagram in blanking bin；
Fig. 6 is that material is distributed detects schematic diagram in blanking bin；
Fig. 7 is vibrating arm structure and running orbit schematic diagram；
Fig. 8 is tripper and weighing hopper side wall construction schematic diagram；
Fig. 9 is electric machine speed regulation curve；
Figure 10 is more component material layering schematic diagrames in weighing hopper；
Figure 11 is variation diagram of being weighed in material dropping process；
Figure 12 is the error statistics figure in a kind of material iteration prediction blanking process.
Wherein：1st, blanking bin 2, auger conveyor 3, weighing hopper 4, Weighing module 5, discharge valve 6, blending bucket 7, push away
Plate 8, conveying pipeline 9, controller 10, storage bin 11, feed pump 12, vibrating arm 13, blender 14, level sensor
15th, feed pipe 16, material shower nozzle 17, aperture 18, range sensor base 19, range sensor 20, material position face 21, stop
By pointing to point 22, scan line 23, tripper 24, tripper nozzle 25, sub-material projection 26, tremie pipe
30th, frame 101, pumping board
121st, pillar 122, head 123, vibrator 124, the bar 125 that shakes, particle projection 126, shake bar track
201st, screw case 202, conveying screw rod 203, connector 204, motor
Embodiment
The preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any replacement made in the spirit and scope of the present invention, modification, equivalent method and scheme.
Thoroughly understand in order that the public has to the present invention, be described in detail in present invention below preferred embodiment specific
Details, and description without these details can also understand the present invention completely for a person skilled in the art.
More specifically description is of the invention by way of example referring to the drawings in the following passage.It should be noted that accompanying drawing is adopted
Non- accurately ratio is used with more simplified form and, only to convenience, lucidly aid in illustrating the embodiment of the present invention
Purpose.
As depicted in figs. 1 and 2, the present invention is based on the more component proportioning materials devices of screw, and described device includes blanking bin
1st, auger conveyor 2, weighing hopper 3, Weighing module 4, discharge valve 5, blending bucket 6 and controller 9, wherein the material of every kind of component is all
There are one group of blanking bin 1 and the correspondence of auger conveyor 2, conventional component classification is 2~6 kinds, can also increase component as needed
Classification.Preferably, the feed bin shape structure that blanking bin 1 is formed from right-angled trapezium and rectangle, the blanking bin and helical feed
Device is 2~6 groups.
One pumping board 101 arranged at the bottom of blanking bin 1, and pumping board is opened during blanking, and material flows out at blanking bin bottom opening.
Auger conveyor 2 includes screw case 201, conveying screw rod 202, connector 203 and motor 204, the shell of motor 204
It is connected by connector 203 with screw case 201, the conveying screw rod 202 in screw case 201 passes through axle sleeve and motor 204
Axle is connected；At the bottom opening of blanking bin 1 with respect to there is a charging aperture upper surface of screw case 201, its other end relative with motor
Tremie pipe 26 is connected to, tremie pipe 26 is fixed in frame 30.
Preferably, the inwall of tremie pipe 26 can set helicla flute, and the cell wall of the helicla flute is close to blanking bottom of the tube
Endpiece is discontinuously distribution.
Preferably, can be set in tremie pipe 26 one be made up of two frustums of a cone, its vertex of a cone is relative and there is lotus at lower frustum bottom
The part of fluffy head shower nozzle, makes material even drop down.
With reference to shown in Fig. 1 and Fig. 2, during blanking, controller 9 opens pumping board 101, and material falls into spiral transferring from blanking bin 1
Send in the screw case 201 of device 2, order motor 204 starts controller 9 again, and conveying screw rod 202 rotates with motor, by material
The tremie pipe 26 of end is transported to, and is fallen into from tremie pipe 26 in the weighing hopper 3 of lower section.
Framework of the frame 30 as equipment, for fixing and supporting other all parts.Weighing module 4 is fixed on frame 30
On, weighing hopper 3 is then movable to be withheld on Weighing module 4, and opening, the opening of the opening and closing are arranged at the bottom of weighing hopper 3
By the control of discharge valve 5.Weighing hopper 4 is located at the bottom of tremie pipe 26, and multiple auger conveyors 2 are with respect to tremie pipe 26 and weighing hopper
4 center is radially distributed.
Controller 9 uses touching type operation mode, there is formula of the man-machine interface for the more component materials of progress on its touch-screen
And the setting of other specification, formula includes the gross weight of a blanking and each component accounts for the percentage of the weight.Controller 9 is dynamic
State reads the current reading of Weighing module 4, passes through the blanking dispensing for controlling each action component to realize by formula.
Blending bucket 6 is located at the lower section of discharge valve 5, and a push pedal 7 is arranged at its bottom, and a conveying pipeline 8 is connected with below push pedal,
The mixed material of more components is transported to packaging bag or production equipment by the latter.
Preferably, a level sensor 14 is installed in the side wall of blending bucket 6, its internal also blender
13, the blender 13 uses helical blade agitator.The capacity of blending bucket 6 is some such as 15 times of weighing hopper 3, is completed
After multiple secondary amounts blankings, controller 9 reads the state of level sensor 14, if detecting, material position exceedes given threshold, controls
Blender Stirring processed, by various materials it is well mixed after, under the control of controller 9, push pedal 7 is opened, mixed material from
Conveying pipeline 8 exports.
Fig. 3 illustrates the change that material position drop impacts with blanking speed to weighing hopper in material dropping process, and material is with first
Speed v0Fallen from auger conveyor 2, the distance of the outlet of auger conveyor 2 and the bottom of weighing hopper 3 is H, with weighing hopper
Material position h2Increase, falling down error h1It will diminish.
The quality of material equivalent change that Weighing module detects can be represented by the formula：
Wherein, the unit interval blanking quality (g/s) exported in t, dm for auger conveyor 2, v0Fallen for material
When initial velocity, the speed of Δ m material when falling on weighing hopper is within the Δ t times from speed v1It is changed into 0.
From formula (1) as can be seen that with falling down error h1 change, impact of the material to weighing hopper also with change, because
This, the weight change of weighing hopper changes over time.
On the other hand, in formula (1) unit interval blanking mass equivalent also by the shadow of material fractions distribution in blanking bin 1
Ring.
Simple screw feed appliance belongs to positive displacement quantitative category, and the present invention is entered using dynamic weighing to material falling amount
Row detection, and pass through the prediction of iterative learning progress material air weighting.The change of material descent rate during in order to reduce screw rod transmission
Change, accelerate study convergence rate and suppress the fluctuation range of controlled quentity controlled variable, with reference to shown in 4,5,6 and 7, the present invention uses Distance-sensing
Device and rotatable vibrating arm are detected and adjusted to the solid accumulation form in blanking bin so that are alternately gone out above its feed opening
Now the formation of dynamic material arch ensures the stabilization of material compacting degree and blanking form with caving in.
As shown in figure 4, blanking bin 1 constantly discharges, when material position is reduced to certain value in storehouse, it is necessary to carry out feed supplement to it.
Therefore, setting a storage bin 10 above blanking bin 1, the material in storage bin 10 is entered by feed pump 11 and feed pipe 15
Blanking bin 1.To cause material particles even drop down, a material shower nozzle 16, material are provided with the end outlet of feed pipe 15
The surface of shower nozzle 16 is spherical, and its surface distributed has circular aperture 17, and small aperture carries out preferred according to the granularity of material.Charging
Pump 11 uses screw feed pump, and its action is controlled by controller.
As shown in figure 5, feed pump 11 is under the control of the controller so that the material position of material top surface is maintained at pre- in blanking bin
If value LTNear, its rotating speed is controlled as the following formula：
Wherein, VEnter 0For a setting maximum feed velocity, l is the current material position of blanking bin, LMAnd LmIt is respectively default
LTNeighbouring highest, minimum material position.
With reference to shown in Fig. 6,7, the present invention is coordinated by the detection of range sensor and vibrating arm with action, is significantly subtracted
Compaction force effect caused by weak charging impact, effectively prevent the size segregation of material in storehouse, makes in the magazine of bottom
Material activating, it ensure that being uniformly distributed for material so that uniform laminar flow regime is presented in particle swarm in blanking process.
Two figures of left and right are respectively from the side view of blanking bin 1 and overlook direction in Fig. 6, as shown in fig. 6, near in blanking bin 1
Range sensor 19 is installed, the range sensor 19 has a range sensor base on one drift angle of frame central
18, this base can carry out pitching and rotation so that range sensor can carry out material in different stop on the direction for pointing to point 21
Detection, it is each to stop the scan line 22 for pointing to the composition of point 21 close to concentric circles, so as to judge the distribution in material position face 20.
As shown in fig. 7, the present invention is acted to improve the distribution of material by vibrating arm 12 in blanking bin 1.Vibrating arm 12
It is fixed in frame 30, its pillar 121 for including being sequentially connected, head 122, vibrator 123, shake bar 124, in vibrator 123
Spring buffer is arranged at bottom, and the surface distributed of bar 124 of shaking has particle projection 125, and head 122 can carry out pitching and rotation so that shake
Bar 124 does curvilinear motion in blanking bin 1.
In blanking process, the present invention is sentenced by the detection of range sensor and the tracking to unit interval blanking rate respectively
The distribution of material in disconnected blanking bin so that the material position face in blanking bin keeps near parabolic face shape.With reference to shown in Fig. 6 and Fig. 7,
When material is uniformly distributed, material distance value that range sensor is detected in different azimuth is through ray and vertical direction angle
It is approximately centered in after geometric transformation in a less scope.When hardened or stable material arch locally occurs for material, detect
Distance value exceed this scope.Meanwhile real-time tracking is carried out by blanking speed of the Weighing module to each blanking bin.When distance passes
After sensor detects above-mentioned abnormality or finds that the fluctuation of unit interval discharge quantity exceedes given threshold such as 5%, controller life
Vibrating arm is made to act, by the operating of head, its bar that shakes does snake from the off through material position high point region to material position low spot region
Shape stirs, and shake bar track 126 of the tail end of bar 124 in blanking bin 1 that shake is as shown in Figure 7；Meanwhile vibrator starting of oscillation, shake on bar
The raised particle for driving periphery of particle, so as to abolish the hardened or material arch formed once in a while, material distribution is set to recover uniform.By right
The dynamic detection of material distribution and control, reduce the fluctuation of material compacting degree, so as to the stabilization of guarantor unit's time charging quantity.
While vibrating arm acts, suspend blanking, and pumping board is shut.
With reference to shown in Fig. 3 and Fig. 8, from formula (1) as can be seen that due to material falling down error h1 change, material is to metering
Also with change, it is change to cause the weight gain in the Weighing module unit interval for the impact of bucket.As shown in figure 8, to subtract
The influence of small falling down error change, the present invention set a tripper 23 on the top of weighing hopper 3, and tripper 23 is circular cone in top
Body bottom is the hourglass shape tripper of the cone structure flattened；Its middle and upper part is opening shape, receives the material in blanking bin；Bottom
Then only slope shape nozzle 24 has been symmetrically distributed it at the both ends of length direction.Weighing hopper 3 is towards being distributed with the direction of nozzle 24
Spherical crown shape sub-material projection 25 straggly, preferably, sub-material projection diameter is 0.2~0.6 millimeter or is the 2 of institute's junk material diameter
~3 times.
By the effect of tripper, material, which falls, was divided into for three stages, and the first stage is from the opening of blanking bin bottom through spiral
Conveyer is to tremie pipe, and second stage falls on tripper under tremie pipe, during the phase III is from tripper nozzle to weighing hopper
Expect heap.Wherein, the material impact in the first two stage is approximate constant, the phase III, due to wrong on tripper and metering headwall
Fall to be distributed sub-material raised role, the speed that material particles impact material face in weighing hopper has substantially reduced, and is sprayed from tripper
The impulsive force difference that mouth reaches different height material heap face in weighing hopper is very small, so as to provide bar for the prediction of the iteration of controller
Part.
The air weighting to be fallen based on iterative learning, controller dynamic prediction material, with reference to shown in Fig. 9, the step of blanking control
It is rapid as follows：
(1) according to a secondary amounts and each formula rate, a discharge quantity Ws of each component, the accumulation blanking to each component are determined
Error E assigns initial value 0；Current component is set as the first component；
(2) sensed values of Weighing module are read to current component blanking, controller, record the initial weight G0 of weighing hopper,
Start auger conveyor and with μ amaxAcceleration accelerates, when speed reaches vH=λ vRWhen keep speed it is constant, record start
Moment is t0；
Wherein, amaxFor the specified peak acceleration of screw rod of auger conveyor, vRFor maximal rate, μ be (0.5~0.9) it
Between acceleration factor, velocity coeffficients of the λ between (0.85~1.0)；
(3) when detecting that weighing hopper weight reaches (G0+Ws-Wa-0.5 λ dts) when, begin to shut off helical feed
Device and with μ amaxAcceleration reduces speed now, until stopping；
Wherein, the blanking speed of auger conveyor, t when d is operated for screw rod with maximal ratesFor from the moment t that reduces speed now2
Start to stop timing t3Between time span：ts=λ vR/μ·amax；
(4) wait material to drop down onto weighing hopper down completely, read the sensed values of Weighing module, obtain currently practical discharge quantity
Wr, calculate this drafting error e=Wr-Ws；
(5) renewal accumulation drafting error E '=E+e, calculates air weighting predicted value Wa '=Wa+ (α e+ β E '), wherein, α and β
Respectively the iteration coefficient of section (0,1) and there is alpha+beta=1；
(6) iteration, E=E ', Wa=Wa ' are made, is that the blanking next time of this component prepares；
(7) blanking component is changed, if whole component blankings finish, turns in next step, otherwise, to go to step 2；
(8) discharge valve is opened so that a formula ratio material of more component material compositions falls into blending bucket, reads material position and passes
The state of sensor, if detecting, material position exceedes given threshold, controls blender Stirring, more component materials are well mixed
Afterwards, push pedal is opened, mixed material is exported from conveying pipeline；
(9) if default blanking batch has been completed, blanking is terminated；Otherwise, component is set as the first component, turned
Step 2.
During blanking, controller is also analyzed by the calculating of adjust the distance sensor and Weighing module signal, in blanking bin
Material heap form detected in real time, if finding improper blanking, order rotatable vibrating arm to act in time, when ensureing blanking
Entirety be uniformly distributed.
It is preferably, further comprising the steps of in the blanking control of dispensing：
(a) sorted from big to small by discharge quantity Ws of each component value, determine the blanking order of each component；
(b) for digitial controller, as time t >=t0+0.85Ws/d, controller forbids the institute in addition to security response
There is external interrupt；
(b) when detecting blending bucket material position, blender discontinuously one small fan angle of multiple rotary, the shape of level sensor is read
State, if there is material position to exceed given threshold always, batch mixing stirring is just carried out, to prevent full material false during material heap skewness.
Before continuous blanking, following operate also is carried out：
(i) by test experiment, Weighing module and range sensor are demarcated；
(ii) parameter setting, including a secondary amounts, formula table, batch value, blanking speed are carried out by the touch-screen of controller
The duration Tb and number of repetition of demarcation, stably weigh delay Td；
(iii) blanking demarcation is carried out to each component：Since 0 moment as or with reference to shown in figure 9 speed governing curve operating spiral shell
Conveyer certain time length Tb is revolved, at the Tb+Td moment after closing auger conveyor Tb moment and stabilization of weighing, reads and remembers respectively
Record the gravimetric value Wcb and Wdb of Weighing module；After repeatedly, the blanking speed d=AVG [Wdb/ (Tb- of this component are calculated
ts)]/λ, air weighting initial value Wa=AVG (Wdb-Wcb).
Blanking is carried out using the inventive method, Figure 10-12 gives the result of blanking.Wherein, Figure 10 show 4 kinds of components
Material distribution schematic diagram during blanking in weighing hopper.Figure 11 is mould of being weighed in 900ms duration material dropping process of a component
The change curve of block reading, wherein, abscissa is the delay time after closing auger conveyor.It is therefrom visible, due to impulsive force
Effect, reading of weighing will appear from overshooting, and then just be returned to actual weight；Also, after auger conveyor closes about 700ms
Aerial material just falls completely within weighing hopper, and Weighing module reading tends towards stability.
Figure 12 is the statistics of one-component material drafting error in blanking process of the present invention, it can be seen that due to repeatedly
The factor of accumulated error is considered in generation prediction, therefore, not only drafting error can level off to 0, by iteration several times, accumulated error
Also gradually convergence.Therefore, the material in iterative learning procedure need not be discarded compared to other iterative learnings, this method, and
It is that may be directly applied to subsequent production, so the quick dispensing blanking suitable for small lot.
Embodiments described above, the restriction to the technical scheme protection domain is not formed.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical scheme
Within enclosing.
Claims (8)
1. the more component proportioning materials methods of screw, it comprises the following steps：
S1, according to a secondary amounts and each formula rate, determine a discharge quantity Ws of each component, the accumulation drafting error to each component
E assigns initial value 0；Current component is set as the first component；
S2, the blanking since blanking bin to current component, controller read the sensed values of the Weighing module of support weighing hopper, record
The initial weight G0 of weighing hopper, start auger conveyor and with μ amaxAcceleration accelerates, when speed reaches vH=λ vRShi Bao
It is constant to hold speed, the record starting moment is t0；
Wherein, amaxFor the specified peak acceleration of screw rod of auger conveyor, vRFor maximal rate, μ is between (0.5~0.9)
Acceleration factor, velocity coeffficients of the λ between (0.85~1.0)；
S3, when detecting that weighing hopper weight reaches (G0+Ws-Wa-0.5 λ dts) when, begin to shut off auger conveyor and with
μ·amaxAcceleration reduces speed now, until stopping；
Wherein, Wa is air weighting predicted value, the blanking speed of auger conveyor, t when d is operated for screw rod with maximal ratesFor from opening
Begin to slow down the moment to the time span between the stop timing, ts=λ vR/μ·amax；
S4, wait material to drop down onto weighing hopper down completely, read the sensed values of Weighing module, obtain currently practical discharge quantity Wr, count
Calculate this drafting error e=Wr-Ws；
S5, renewal accumulation drafting error E '=E+e, calculate air weighting predicted value Wa '=Wa+ (α e+ β E '), wherein, α and β difference
Iteration coefficient for section (0,1) and there is alpha+beta=1；
S6, iteration, make E=E ', Wa=Wa ', are that the blanking next time of this component prepares；
S7, blanking component is changed, if whole component blankings finish, turn in next step, otherwise, to go to step S2；
S8, the discharge valve for opening weighing hopper bottom so that a formula ratio material of more component material compositions falls into blending bucket, reads
The state of level sensor in blending bucket is taken, material position exceedes given threshold if detecting, blender rotates in order blending bucket
Stirring, after more component materials are well mixed, the push pedal of blending bucket bottom is opened, mixed material is exported from conveying pipeline；
If S9, default blanking batch have been completed, terminate blanking；Otherwise, component is set as the first component, gone to step
S2。
2. the more component proportioning materials methods of screw according to claim 1, it is characterised in that before the step S1,
Also following steps：
T1, by test experiment, the range sensor in Weighing module and blanking bin is demarcated；
T2, the touch-screen progress parameter setting by controller, including a secondary amounts, formula table, batch value, blanking rate self-calibration
Duration Tb and number of repetition, stably weigh delay Td；
T3, blanking demarcation is carried out to each component：Since 0 moment spiral is operated by the speed governing curve of even acceleration-constant speed-even deceleration
Conveyer certain time length Tb, at the Tb+Td moment after closing auger conveyor Tb moment and stabilization of weighing, read and record respectively
The gravimetric value Wcb and Wdb of Weighing module；After repeatedly, the blanking speed d and air weighting initial value Wa=of this component are calculated
AVG(Wdb-Wcb)。
3. the more component proportioning materials methods of screw according to claim 1, it is characterised in that further comprising the steps of：
Step S1 also includes：Sorted from big to small by discharge quantity Ws of each component value, determine the blanking order of each component；
Step S3 also includes：As time t >=t0+0.85Ws/d, controller is forbidden in all outsides in addition to security response
It is disconnected；
Step S8 also includes：Blender discontinuously one small fan angle of multiple rotary, the state of level sensor is again read off, if still
Right material position exceedes given threshold, just carries out batch mixing stirring.
4. the more component proportioning materials methods of screw according to claim 1, it is characterised in that further comprising the steps of：
The range sensor that rotation is located in blanking bin on the drift angle of nearly frame central carrys out detectable substance burden distribution, and passes through Weighing module
Real-time tracking is carried out to blanking speed, when discovery blanking bin material EDS maps exceed under setting range, or discovery unit interval
After expecting that rate fluctuation exceedes given threshold such as 5%, control order is fixed on frame and the vibrating arm close to blanking bin side wall moves
Make, adjust the solid accumulation form in blanking bin.
5. the more component proportioning materials methods of screw according to claim 1, it is characterised in that set above the blanking bin
There are storage bin and feed pump, the feed pump is screw feed pump, and there are a material shower nozzle, institute in the outlet of its rear end feed pipe
Material shower nozzle is stated to be spherical, its surface distributed has circular aperture, and the charging revolution speed is controlled by such as following formula：
Wherein, VEnter 0For a setting maximum feed velocity, l is the current material position of blanking bin, LMAnd LmRespectively default highest, most
Low bin-level.
6. the more component proportioning materials methods of screw according to claim 1, it is characterised in that：Set on the top of weighing hopper
One tripper, the tripper is in the hourglass shape tripper that top is that cone bottom is the cone structure flattened, its top
For opening shape, then only there is slope shape nozzle bottom at the both ends of length direction；The weighing hopper is towards on the direction of the nozzle
It is distributed with that spherical crown shape sub-material straggly is raised, the material that material is fallen into weighing hopper through tripper nozzle and sub-material projection during blanking
Heap.
7. the more component proportioning materials methods of screw according to claim 6, it is characterised in that：The blanking bin bottom has
One pumping board；The auger conveyor includes screw case, conveying screw rod, connector and motor, and the motor housing passes through connection
Device is connected with screw case, and the conveying screw rod in screw case is connected by axle sleeve with motor shaft, screw case upper surface relatively under
Bin bottom opening has a charging aperture, and screw case the other end relative with motor is also associated with a blanking placed vertically
Pipe, pumping board is opened during blanking, material falls on meter through auger conveyor from the opening of blanking bin bottom to tremie pipe, then through tripper
On material heap in batch box.
8. the more component proportioning materials methods of screw according to claim 4, it is characterised in that：The vibrating arm include according to
Secondary connected pillar, head, vibrator, shake bar, and spring buffer arranged at the vibrator bottom, and the bar surface distributed of shaking has
Grain is raised, the vibrator starting of oscillation and bar that shakes does snakelike agitation when vibrating arm acts.
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| CN110073998A (en) * | 2019-06-12 | 2019-08-02 | 天津农学院 | A kind of forage compounding feeding system |
| CN110694542A (en) * | 2019-11-01 | 2020-01-17 | 刘洋 | Waterproof coating, preparation system thereof and waterproof coating processing method |
| WO2020143440A1 (en) * | 2019-01-08 | 2020-07-16 | 金发科技股份有限公司 | Material distribution apparatus and method |
| US11934652B2 (en) | 2020-10-14 | 2024-03-19 | Samsung Electronics Co., Ltd. | Display apparatus and control method thereof |
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| CN103350765A (en) * | 2013-06-13 | 2013-10-16 | 周怡 | Soda packing machine three-speed frequency conversion feeding process |
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| CN101226377A (en) * | 2008-02-04 | 2008-07-23 | 南京理工大学 | Robust control method for asphalt mixing plant batching error |
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| WO2020143440A1 (en) * | 2019-01-08 | 2020-07-16 | 金发科技股份有限公司 | Material distribution apparatus and method |
| CN110073998A (en) * | 2019-06-12 | 2019-08-02 | 天津农学院 | A kind of forage compounding feeding system |
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