CN107715727B - Screw multiple groups part proportioning materials device and its controller - Google Patents
Screw multiple groups part proportioning materials device and its controller Download PDFInfo
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- CN107715727B CN107715727B CN201710895901.5A CN201710895901A CN107715727B CN 107715727 B CN107715727 B CN 107715727B CN 201710895901 A CN201710895901 A CN 201710895901A CN 107715727 B CN107715727 B CN 107715727B
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Classifications
-
- 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
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2112—Level of material in a container or the position or shape of the upper surface of the material
-
- 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
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/2201—Control or regulation characterised by the type of control technique used
- B01F35/2206—Use of stored recipes for controlling the computer programs, e.g. for manipulation, handling, production or composition in mixing plants
-
- 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
- B01F35/7173—Feed mechanisms characterised by the means for feeding the components to the mixer using gravity, e.g. from a hopper
- B01F35/71731—Feed mechanisms characterised by the means for feeding the components to the mixer using gravity, e.g. from a hopper using a hopper
-
- 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
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets
-
- 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
- B01F35/71815—Feed mechanisms characterised by the means for feeding the components to the mixer using vibrations, e.g. standing waves or ultrasonic vibrations
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention discloses screw multiple groups part proportioning materials device and its controller, the proportioner includes rack, multiple groups blanking bin and auger conveyor, weighing hopper, Weighing module, discharge valve, blending bucket, controller, storage bin and feed pump；There is a hourglass shape tripper on the top of weighing hopper, is separately installed with range sensor and vibrating arm on blanking bin side wall and rack.Controller makes the Level control of blanking bin in a close limit by adjusting the revolving speed of feed pump, adjusts the running speed of auger conveyor, and be iterated PREDICTIVE CONTROL to its shut-in time based on current and accumulation drafting error.The present invention reduces the variation of material distribution and impact in blanking process using range sensor, vibrating arm and tripper, accelerates iteration and predicts convergence rate, higher blanking velocity is obtained while guaranteeing precision, and be suitable for the quick ingredient of small lot.
Description
Technical field
The present invention relates to quantitative ingredient fields, and in particular to a kind of screw multiple groups part proportioning materials device and its control
Device.
Background technique
In industrial or agricultural manufacture and commodity packaging, there is a large amount of powder grain material, as polypropylene, polystyrene, polyvinyl chloride,
The industrial chemicals such as light methylcellulose, polyacrylonitrile, epoxy powder coating, the building materials raw material such as quartz sand, cement, washing powder
Equal daily chemical products, the corn beans such as millet, soybean agricultural products or powder, slag, granular processed food, feed, chemical fertilizer, pesticide
Equal agricultural productions material and health care product, Chinese and Western medicine, the flavouring of granular etc. are required to automatic quantitative packing or ingredient
Manufacture.
China has many enterprises still to use manual quantitative ingredient or packaging, one side large labor intensity, rate at present
Slowly, deficiency in economic performance；On the other hand, food, drug etc. quantitatively tend not to meet hygienic requirements, poisonous and hazardous object by hand
Material, it is artificial to participate in quantitatively being easy to cause harm to the human body.Therefore for manufacturing enterprise, be badly in need of provide cost is relatively low but have compared with
High-speed and multiple groups part automatic ration blanking dispensing equipment of accuracy perhaps device meet a large amount of material dosing packaging or
Ingredient manufacture requires.
At present both at home and abroad there are two types of powder grain material automatic quantitative blanking machine common methods, positive displacement and Weighing type.Volume
Formula quantitative basis material volume carries out metering filling or feeds intake, and quantitatively feeds intake rapidly, but quantitative quality of material is close by material
Degree changes and changes.To improve cutting stock precision, there are a variety of adjusting methods, such as application No. is 201320001933.3 China
Patent uses frequency control to screw rod, slows down gradually rate of feeding close to target value, reduces falling down error value；Application No. is
201310234280.8 Chinese patent, under dividing the multistage using big small screw in soda ash packing machine three-speed frequency conversion feeding process
Material；It considers to be difficult to control when fast blanking quantitatively and by first quick and back slow application No. is 200920248298.2 Chinese patent
Method come reduce feed drop influence；The blanking final value of these non-Weighing type schemes can only be close to desired value, and accuracy is not
It is high.
One secondary amounts of material set by Weighing type quantitative basis carries out metering filling or feeds intake, and needs in blanking process
Constantly weighing, according to weighing results feedback control discharge quantity, due to weighing by blanking impact and aerial lag material influenced compared with
Greatly, blanking velocity and precision all suffer from many difficulties.Interference in order to compensate for aerial material to measuring accuracy, many schemes use
The technology of valve is closed in advance, and such as application No. is 201410230888.8 Chinese patents is divided into three for batching weighing process
Stage, and calculate closing using iterative learning control mode in the last stage and shift to an earlier date control amount, but the program is only capable of mentioning
Cutting stock precision after the completion of height study, the accumulation cutting stock precision in learning process not can guarantee then.
Summary of the invention
Simple screw feed appliance belongs to positive displacement quantitative scope, and filling is measured in positive displacement quantitative filling based on volume
The quantity of material, structure is simple, at low cost, but quantitative filling speed stability and precision depend on the stabilization of material apparent gravity
Property, it is affected by material 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 for revolving filling machine realizes quantitative filling；The latter's measuring cup, graduated cylinder or quantitative filling machine of plunger etc.；Two types are all
There is a common problem, seeks to make as far as possible the apparent gravity of material to stablize.
Since common positive displacement is substantially conversion formula, no image of Buddha Weighing type equally grasps the definite quality of blanking, after
Although occur finishing the scheme for being collectively referred to as weight, can only be sent by blanking final stage is extremely low due to there is no air weighting to predict
Speed is expected to guarantee precision.
For this purpose, the invention patent by dynamic weighing detection in conjunction with screw feeding device while, under blanking device
Feed bin and weighing hopper improve, and reduce the variation of compactness and material falling down error in material silo, and by pre- in iteration
Using error current and accumulated error as controlled volume in survey, dynamic adjusts in blanking process auger conveyor dwell time and last
The running speed in one stage avoids general screw rod to obtain higher average operating speed while guaranteeing precision
Formula blanking device operates especially slow problem in final stage.
The technical solution of the invention is as follows, provides a kind of screw multiple groups part proportioning materials device with flowering structure: its
Including rack, blanking bin, auger conveyor, weighing hopper, Weighing module, discharge valve, blending bucket, controller, storage bin and charging
Pump；
The auger conveyor is located at the lower section of blanking bin, and the blanking bin and auger conveyor are 2~6 groups,
The weighing hopper below auger conveyor, is mounted on the Weighing module for being fixed on rack, and its bottom
Opening is controlled by discharge valve；One tripper is arranged at the top of the weighing hopper；
The blending bucket is located at below discharge valve, and a push plate is arranged at its bottom；
The controller makes the material position of blanking bin in a preset range by controlling the revolving speed of feed pump, by each
The opening time and running speed of a auger conveyor are controlled and are read to the sensing data of Weighing module, carry out each component respectively
The blanking of material is demarcated；Prediction, and the comparison based on accumulation discharge quantity and formulation data are iterated to the air weighting of its blanking
The shut-in time of auger conveyor is adjusted；Controller successively controls each auger conveyor movement, completes primary formula
After measuring blanking, discharge valve is opened, then after detecting the accumulation of material to setting value in blending bucket, push plate is opened, will mix
Uniform material discharge.
Preferably, the feed pump is screw feed pump, there are a material spray head, institute in the outlet of its rear end feed pipe
State material spray head be it is spherical, circular aperture is distributed in surface.
Preferably, the charging revolution speed is controlled as the following formula:
Wherein, VInto 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, being equipped with a range sensor on the apex angle of the nearly frame central of the blanking bin, the distance is passed
Sensor has a rotating base.
Preferably, it is the cone structure flattened that the tripper, which is cone lower part in top, upper part is opening shape,
Then only there is slope shape nozzle in lower part at the both ends of length direction；The weighing hopper is distributed with straggly on the direction towards the nozzle
Spherical crown shape sub-material protrusion.
Preferably, the rack is equipped with vibrating arm close to blanking bin side-walls, the vibrating arm includes being sequentially connected
Pillar, holder, vibrator, vibration bar, spring buffer is arranged at the vibrator bottom, and it is convex that particle is distributed in the vibration bar surface
It rises.
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 axis
Set is connected with motor shaft, and with respect to having a feed inlet at blanking bin bottom opening, screw case is opposite with motor for screw case upper surface
The other end is also connected with the feeder pipe placed vertically.
It is internal there are one blender preferably, be equipped with a level sensor on the side wall of the blending bucket,
The blender uses helical blade blender, and there are one conveying pipelines for the push plate lower section.
Preferably, the controller predicts the air weighting of blanking using following formula:
Wak+1=Wak+(α·ek+β·Ek),
Wherein, WakAnd Wak+1It is air weighting predicted value twice in succession, e respectivelykAnd EkBlanking when respectively kth is secondary misses
Difference and accumulation drafting error, α and β are respectively the coefficient in section (0,1) and have alpha+beta=1.
Preferably, the controller in the following way controls the running speed of auger conveyor:
A, from halted state with μ amaxAcceleration starts, when speed reaches λ vRWhen keep speed it is constant；
B, upon closing between then, with μ amaxAcceleration reduces speed now, until stopping；
Wherein, amaxFor the specified peak acceleration of screw rod of auger conveyor, vRFor maximum speed, μ be (0.5~0.9) it
Between acceleration factor, velocity coeffficient of the λ between (0.85~1.0)；
The shut-in time refers to that the cutting stock weight currently read from Weighing module is equal to:
Wherein, Ws and Wa is respectively discharge quantity of current material and air weighting predicted value, and d is that screw rod is transported with maximum speed
The blanking rate of auger conveyor, t when turningsFor deceleration dwell time length: ts=λ vR/μ·amax。
Another technical solution of the invention is to provide screw multiple groups part proportioning materials Setup Controller comprising
Input module, memory module, output module and processing module, the processing module include again prediction module, monitoring weight module,
Error calculating module and Logic control module；
Input module receives touch screen operation instruction and reads the sensing data of Weighing module,
Memory module is used for storage configuration data and process data,
Real-time weight value that monitoring weight module is obtained according to input module with through the compensated target of air weighting predicted value
Weight value is compared and closes the auger conveyor below blanking bin by output module when this two weight values are equal,
Error calculating module carries out calculating update to this drafting error and accumulation drafting error,
Prediction module predicts air weighting according to last air weighting predicted value, this drafting error and accumulation drafting error
Value is iterated update,
Logic control module wheel flow control each auger conveyor, weighing hopper bottom discharge valve and blanking bin in vibrating arm
Movement carries out ingredient by formula.
Using structure of the invention, compared with prior art, have the advantage that range sensor is respectively adopted in the present invention
The material accumulation form in blanking bin is detected and adjusted with rotatable vibrating arm, guarantees that material compacting degree is stablized；Lead to again
It crosses and tripper is set in weighing hopper to reduce the variation of material falling down error and buckles, the convergence speed of iteration prediction can be accelerated
Degree；By the control to blanking accumulated error in the iteration prediction measured in the sky, the blanking in learning process is had
Effect utilizes, and avoids material waste；Simultaneously because the convergence of iteration prediction, keeps screw rod in blanking process compared with Gao Yun
Rotary speed improves blanking efficiency.
Detailed description of the invention
Fig. 1 is the composite structural diagram of screw multiple groups part proportioning materials device；
Fig. 2 is the shape assumption diagram of screw multiple groups part proportioning materials device；
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 detection schematic diagram in blanking bin；
Fig. 7 is vibration rod structure and running track 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 multiple groups part material layering schematic diagram in weighing hopper；
Figure 11 is variation diagram of weighing in material dropping process；
Figure 12 is the error statistics figure in a kind of material iteration prediction blanking process；
Figure 13 is the composite structural diagram of screw multiple groups part proportioning materials Setup Controller.
Wherein: 1, 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
15, feed pipe 16, material spray head 17, aperture 18, range sensor pedestal 19, range sensor 20, material position face 21, stop
By being directed toward point 22, scan line 23, tripper 24, tripper nozzle 25, sub-material protrusion 26, feeder pipe
30, rack
91, input module 92, processing module 93, memory module 94, output module 95, monitoring weight module 96, patrol
Collect control module 97, prediction module 98, error calculating module
101, pumping board
121, pillar 122, holder 123, vibrator 124, vibration bar 125, particle protrusion 126, vibration bar track
201, screw case 202, conveying screw rod 203, connector 204, motor
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific
Details, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating the embodiment of the present invention
Purpose.
As depicted in figs. 1 and 2, screw multiple groups part proportioning materials device of the present invention comprising blanking bin 1, helical feed
Device 2, weighing hopper 3, Weighing module 4, discharge valve 5, blending bucket 6 and controller 9, wherein the material of every kind of component has one group of blanking
Storehouse 1 and auger conveyor 2 are corresponding, and common component classification is 2~6 kinds, can also increase component classification as needed.As excellent
Choosing, blanking bin 1 select the feed bin shape structure of right-angled trapezium and rectangle composition, and the blanking bin and auger conveyor are 2~6 groups.
One pumping board 101 arranged at 1 bottom of blanking bin, and pumping board is opened when blanking, and material flows out from 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
Axis is connected；201 upper surface of screw case is with respect to having a feed inlet at 1 bottom opening of blanking bin, the other end opposite with motor
It is connected to feeder pipe 26, feeder pipe 26 is fixed in rack 30.
Preferably, 26 inner wall of feeder pipe 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, in feeder pipe 26 settable one be made of two frustums of a cone, its vertex of a cone is opposite and there is lotus at lower frustum bottom
The component of fluffy head spray head, makes material even drop down.
Referring to figs. 1 and 2, when blanking, controller 9 opens pumping board 101, and material falls into spiral transferring from blanking bin 1
It send in the screw case 201 of device 2, order motor 204 starts controller 9 again, and conveying screw rod 202 is rotated with motor, by material
It is transported to the feeder pipe 26 of end, and from the weighing hopper 3 that feeder pipe 26 falls into lower section.
Frame of the rack 30 as equipment, for fixing and supporting other all parts.Weighing module 4 is fixed on rack 30
On, weighing hopper 3 is then movable to be withheld on Weighing module 4, and opening arranged at the bottom of weighing hopper 3, the opening it is on and off
By the control of discharge valve 5.Weighing hopper 4 is located at the lower part of feeder pipe 26, multiple auger conveyors 2 opposite feeder pipe 26 and weighing hopper
4 center is radially distributed.
In conjunction with shown in Fig. 1 and Figure 13, controller 9, including input module 91, memory module 93, output module 94 and processing
Module 92, the processing module 92 includes prediction module 97, monitoring weight module 95, error calculating module 98 and logic control again
Module 96.
Input module 91 receives the sensing number of operational order and reading Weighing module and range sensor etc. by touch screen
According to memory module 93 is used for storage configuration data and process data, and monitoring weight module 95 is obtained according to input module 91
Real-time weight value be compared with through the compensated target weight value of air weighting predicted value and when this two weight values are equal
The auger conveyor 2 of 1 lower section of blanking bin is closed by output module 94, error calculating module 98 is to this drafting error and accumulation
Drafting error carries out calculating update, and prediction module 97 is according to last air weighting predicted value, this drafting error and accumulation blanking
Error is iterated update to air weighting predicted value, and Logic control module 98 takes turns each auger conveyor 2 of flow control, weighing hopper bottom
Discharge valve and other action components include vibrating arm in blanking bin, in blending bucket push plate and feed pump etc. movement operating, press
Formula carries out ingredient.
Controller 9 uses touching type operation mode, has man-machine interface for the formula of progress multiple groups part material on touch screen
And the setting of other parameters, total weight and each component of the formula including a blanking account for the percentage of the weight.Controller 9 is dynamic
State reads the current reading of Weighing module 4, realizes the blanking ingredient by formula by controlling each action component.
Blending bucket 6 is located at 5 lower section of discharge valve, and a push plate 7 is arranged at its bottom, is connected with a conveying pipeline 8 below push plate,
The mixed material of multiple groups part is transported to packaging bag or production equipment by the latter.
Preferably, being equipped with a level sensor 14 on the side wall of blending bucket 6, internal there are one blenders
13, the blender 13 uses helical blade blender.The capacity of blending bucket 6 is the several 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 is more than given threshold, controls
Blender Stirring processed, after mixing by various materials, under the control of controller 9, push plate 7 open, mixed material from
Conveying pipeline 8 exports.
Fig. 3 illustrates the variation that material position drop and blanking speed impact weighing hopper in material dropping process, and material is with first
Speed v0It is fallen from auger conveyor 2, the outlet of auger conveyor 2 is H at a distance from 3 bottom of weighing hopper, in weighing hopper
Material position h2Increase, falling down error h1It will become smaller.
The quality of material equivalent variation that Weighing module detects can be represented by the formula:
Wherein, in t moment, dm is the unit time blanking quality (g/s) that auger conveyor 2 exports, v0For material whereabouts
When initial velocity, speed of the material of Δ m when falling on weighing hopper is within the Δ t time from speed v1Become 0.
From formula (1) as can be seen that with falling down error h1Variation, material to the impact of weighing hopper also with change, because
This, the weight change of weighing hopper changes over time.
On the other hand, shadow of the unit time blanking mass equivalent also by material fractions distribution in blanking bin 1 in formula (1)
It rings.
Simple screw feed appliance belongs to positive displacement quantitative scope, the present invention using dynamic weighing to material falling amount into
Row detection, and pass through the prediction of iterative learning progress material air weighting.The change of material descent rate when in order to reduce screw rod transmission
Change, accelerate study convergence rate and inhibit the fluctuation range of control amount, in conjunction with shown in 4,5,6 and 7, the present invention uses Distance-sensing
Device and rotatable vibrating arm are detected and are adjusted to the material accumulation form in blanking bin, so that alternately going out above its feed opening
The now formation and collapsing of dynamic material arch, guarantees the stabilization of material compacting degree and blanking form.
As shown in figure 4, blanking bin 1 constantly discharges, when material position is reduced to certain value in storehouse, need to carry out feed supplement to it.
For this purpose, a storage bin 10 is arranged above blanking bin 1, the material in storage bin 10 is entered by feed pump 11 and feed pipe 15
Blanking bin 1.To make material particles even drop down, a material spray head 16, material are equipped at the end outlet of feed pipe 15
16 surface of spray head be it is spherical, surface is distributed with circular aperture 17, and small aperture carries out preferred according to the granularity of material.Charging
Pump 11 uses screw feed pump, and movement 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, revolving speed is controlled as the following formula:
Wherein, VInto 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.
In conjunction with shown in Fig. 6,7, the present invention is cooperated by the detection and movement of range sensor and vibrating arm, is significantly subtracted
Weak charging impact caused by compaction force effect, effectively prevent the size segregation of material in storehouse, make in the magazine of lower part
Material activating ensure that being uniformly distributed for material.
Two figures are controlled in Fig. 6 respectively from the side view of blanking bin 1 and overlook direction, as shown in fig. 6, close in blanking bin 1
Range sensor 19 is installed, the range sensor 19 has a range sensor pedestal on one apex angle of frame central
18, this pedestal can be carried out pitching and rotation, and range sensor is enabled to carry out material on the direction for being directed toward point 21 in different stop
Detection, it is each to stop the scan line 22 for being directed toward 21 composition of point close to concentric circles, to judge the distribution in material position face 20.
As shown in fig. 7, the present invention is acted in blanking bin 1 by vibrating arm 12 to improve the distribution of material.Vibrating arm 12
It is fixed in rack 30 comprising pillar 121, holder 122, vibrator 123, the vibration bar 124 being sequentially connected, in vibrator 123
Spring buffer is arranged at bottom, and particle protrusion 125 is distributed in vibration 124 surface of bar, and holder 122 can be carried out pitching and rotation, so that vibration
Bar 124 does curvilinear motion in blanking bin 1.
In blanking process, the present invention sentences by the detection of range sensor and to the tracking of unit time 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.In conjunction with shown in Fig. 6 and Fig. 7,
When material is uniformly distributed, material distance value that range sensor is detected in different direction is through ray and vertical direction angle
It is approximately centered in after geometric transformation in a lesser range.When hardened or stable material arch locally occurs for material, detect
Distance value exceed this range.Meanwhile real-time tracking is carried out by blanking rate of the Weighing module to each blanking bin.When distance passes
Sensor detects above-mentioned abnormality or discovery unit time discharge quantity fluctuation is more than controller life after given threshold such as 5%
Vibrating arm is enabled to act, by the operating of holder, the bar that shakes does snake from the off through material position high point region to material position low spot region
Shape agitation, vibration bar track 126 of 124 tail end of bar in blanking bin 1 that shake are as shown in Figure 7；Meanwhile vibrator starting of oscillation, it shakes on bar
Particle protrusion drives the particle on periphery, to abolish the hardened or material arch formed once in a while, material distribution is made to restore uniform.By right
The dynamic detection and control of material distribution, reduce the fluctuation of material compacting degree, thus the stabilization of guarantor unit's time charging quantity.?
While vibrating arm acts, suspend blanking, and pumping board is shut.
In conjunction with shown in Fig. 3 and Fig. 8, the variation due to material falling down error h1 can be seen that from formula (1), material is to metering
Also with change, causing the weight gain in the Weighing module unit time is variation for the impact of bucket.As shown in figure 8, to subtract
A tripper 23 is arranged on 3 top of weighing hopper in the influence of small falling down error variation, the present invention, and tripper 23 is circular cone in top
Body lower part is the hourglass shape tripper of the cone structure flattened；Its middle and upper part is opening shape, receives the material in blanking bin；Lower part
Then slope shape nozzle 24 only has been symmetrically distributed at the both ends of length direction.Weighing hopper 3 is distributed on the direction towards nozzle 24
Spherical crown shape sub-material protrusion 25 straggly, preferably, sub-material projection diameter is 0.2~0.6 millimeter or is the 2 of institute's falling material diameter
~3 times.
By the effect of tripper, material whereabouts was divided into for three stages, and the first stage is from the opening of blanking bin bottom through spiral
For conveyer to feeder pipe, second stage falls on tripper under feeder pipe, the phase III from tripper nozzle to weighing hopper in
Material heap.Wherein, the material impact in the first two stage is approximate constant, the phase III, due to wrong on tripper and metering headwall
Distribution sub-material raised role is fallen, the speed in material face has substantially reduced in material particles impact weighing hopper, sprays from tripper
The impact force difference that mouth reaches different height material heap face in weighing hopper is very small, so that the iteration prediction for controller provides item
Part.
Based on the air weighting that iterative learning, controller dynamic prediction material fall, as shown in connection with 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 is determined, to the accumulation blanking of each component
Error E assigns initial value 0；Current component is set as the first component；
(2) to current component blanking, controller reads the sensed values of Weighing module, records 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；
Wherein, amaxFor the specified peak acceleration of screw rod of auger conveyor, vRFor maximum speed, μ be (0.5~0.9) it
Between acceleration factor, velocity coeffficient of the λ between (0.85~1.0)；
(3) when detecting that weighing hopper weight reaches (G0+Ws-Wa-0.5 λ dts), helical feed is begun to shut off
Device and with μ amaxAcceleration reduces speed now, until stopping；
Wherein, d is the blanking rate of auger conveyor when screw rod is operated with maximum speed, tsFor from the moment t that reduces speed now2
Start to stop timing t3Between time span: ts=λ vR/μ·amax；
(4) it waits material to fall to weighing hopper completely, reads the sensed values of Weighing module, obtain currently practical discharge quantity
Wr calculates this drafting error e=Wr-Ws；
(5) accumulation drafting error E '=E+e is updated, is calculated 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 enables E=E ', Wa=Wa ', for the preparation of blanking next time；
(7) blanking component is replaced, 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 multiple groups part material composition falls into blending bucket, material position is read and passes
The state of sensor, if detecting, material position is more than given threshold, controls blender Stirring, multiple groups part material is uniformly mixed
Afterwards, push plate is opened, mixed material is exported from conveying pipeline；
(9) if default blanking batch has been completed, terminate blanking；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 be measured in real time, if finding improper blanking, rotatable vibrating arm is ordered to act in time, when ensureing blanking
Entirety be uniformly distributed.
Before continuous blanking, also to perform the following operation:
(i) by test experiment, Weighing module and range sensor are demarcated；
(ii) parameter setting, including a secondary amounts, formula table, batch value, blanking rate are carried out by the touch screen of controller
The duration Tb and number of repetition of calibration, stablize weighing delay Td；
(iii) blanking calibration is carried out to each component: operates spiral shell by or with reference to speed governing curve shown in Fig. 9 since 0 moment
Conveyer certain time length Tb is revolved, the auger conveyor Tb moment is being closed and the Tb+Td moment after stablizing of weighing, is reading and remember respectively
Record the weight value Wcb and Wdb of Weighing module；After repeatedly, the blanking rate d=AVG [Wdb/ (Tb- of this component is calculated
ts)]/λ, air weighting initial value Wa=AVG (Wdb-Wcb).
Blanking is carried out using apparatus of the present invention, Figure 10-12 gives the result of blanking.Wherein, Figure 10 show 4 kinds of components
Material distribution schematic diagram when blanking in weighing hopper.Figure 11 is Weighing module reading in a 900ms duration material dropping process
Change curve, wherein abscissa be close auger conveyor after delay time.Therefrom as it can be seen that due to impact force effect,
Weighing reading will overshoot, and then just be returned to actual weight；Also, the aerial object after auger conveyor closes about 700ms
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 apparatus of the present invention blanking process, it can be seen from the figure that by
The factor of accumulated error is considered in iteration prediction, therefore, not only drafting error can level off to 0, by iteration several times, accumulation
Error also gradually restrains.Therefore, compared to other iterative learnings, the present apparatus does not need to give up the material in iterative learning procedure
It abandons, but may be directly applied to subsequent production, so being suitable for the quick ingredient blanking of small lot.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (9)
1. screw multiple groups part proportioning materials device comprising rack, blanking bin, auger conveyor, weighing hopper, Weighing module,
Discharge valve, blending bucket, controller, storage bin and feed pump；
The auger conveyor is located at the lower section of blanking bin, and the blanking bin and auger conveyor are 2~6 groups, is located at spiral transferring
The weighing hopper below device is sent, is mounted on the Weighing module for being fixed on rack, and its bottom opening is controlled by discharge valve；Institute
One tripper is arranged at the top for stating weighing hopper；
It is the cone structure flattened that the tripper, which is cone lower part in top, and upper part is opening shape, and lower part is then only in length
There is slope shape nozzle at the both ends in degree direction；Spherical crown shape sub-material straggly is distributed in the weighing hopper on the direction towards the nozzle
Protrusion；
The blending bucket is located at below discharge valve, and a push plate is arranged at its bottom；
The controller makes the material position of blanking bin in a preset range by controlling the revolving speed of feed pump, by each spiral shell
The opening time and running speed for revolving conveyer are controlled and are read to the sensing data of Weighing module, carry out each component material respectively
Blanking calibration；Prediction is iterated to the air weighting of its blanking, and based on accumulation discharge quantity and formulation data to comparing spiral shell
The shut-in time of rotation conveyer is adjusted；Controller successively controls each auger conveyor movement, in the case where completing a formula ratio
After material, discharge valve is opened, then after detecting the accumulation of material to setting value in blending bucket, push plate is opened, will be uniformly mixed
Material discharge.
2. screw multiple groups part proportioning materials device according to claim 1, it is characterised in that: the feed pump is screw rod
There are a material spray head in formula feed pump, the outlet of its rear end feed pipe, the material spray head be it is spherical, circle is distributed in surface
Shape aperture；
The charging revolution speed is controlled as the following formula:
Wherein, VInto 0For a setting maximum feed velocity, l is the current material position of blanking bin, LMAnd LmRespectively default highest, most
Low bin-level.
3. screw multiple groups part proportioning materials device according to claim 1, it is characterised in that: the nearly rack of the blanking bin
One range sensor is installed, the range sensor has a rotating base on the apex angle at center.
4. screw multiple groups part proportioning materials device according to claim 1, it is characterised in that: the rack is close to blanking
Storehouse side-walls are equipped with vibrating arm, and the vibrating arm includes the pillar being sequentially connected, holder, vibrator, vibration bar, the vibrator
Spring buffer is arranged at bottom, and particle protrusion is distributed in the vibration bar surface.
5. screw multiple groups part proportioning materials device according to claim 1, 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 feed inlet, and screw case the other end opposite with motor is also connected with the blanking placed vertically
Pipe.
6. screw multiple groups part proportioning materials device according to claim 1, it is characterised in that: the side wall of the blending bucket
On a level sensor is installed, internal there are one blender, the blender uses helical blade blender, institute
Conveying pipeline there are one stating below push plate.
7. screw multiple groups part proportioning materials device described in any one according to claim 1~6, it is characterised in that: described
Controller predicts the air weighting of blanking using following formula:
Wak+1=Wak+(α·ek+β·Ek),
Wherein, WakAnd Wak+1It is air weighting predicted value twice in succession, e respectivelykAnd EkRespectively kth time when drafting error and
Drafting error is accumulated, α and β are respectively the coefficient in section (0,1) and have alpha+beta=1.
8. screw multiple groups part proportioning materials device described in any one according to claim 1~6, it is characterised in that: described
Controller in the following way controls the running speed of auger conveyor:
A, from halted state with μ amaxAcceleration starts, when speed reaches λ vRWhen keep speed it is constant；
B, upon closing between then, with μ amaxAcceleration reduces speed now, until stopping；
Wherein, amaxFor the specified peak acceleration of screw rod of auger conveyor, vRFor maximum speed, μ is between (0.5~0.9)
Acceleration factor, velocity coeffficient of the λ between (0.85~1.0)；
The shut-in time refers to that the cutting stock weight currently read from Weighing module is equal to:
Wherein, Ws and Wa is respectively discharge quantity of current material and air weighting predicted value, when d is that screw rod is operated with maximum speed
The blanking rate of auger conveyor, tsFor deceleration dwell time length: ts=λ vR/μ·amax。
9. screw multiple groups part proportioning materials Setup Controller comprising input module, memory module, output module and processing mould
Block, the processing module include prediction module, monitoring weight module, error calculating module and Logic control module again；
Input module receives touch screen operation instruction and reads the sensing data of Weighing module,
Memory module is used for storage configuration data and process data,
Real-time weight value that monitoring weight module is obtained according to input module with through the compensated target weight of air weighting predicted value
Value is compared and closes the auger conveyor below blanking bin by output module when this two weight values are equal,
Error calculating module carries out calculating update to this drafting error and accumulation drafting error,
Prediction module predicts air weighting according to last air weighting predicted value, this drafting error e and accumulation drafting error E '
Value is iterated update: Wa '=Wa+ (α e+ β E '), wherein and α and β is respectively the iteration coefficient in section (0,1) and has alpha+beta=1,
Each auger conveyor of Logic control module wheel flow control, weighing hopper bottom discharge valve and blanking bin in vibrating arm it is dynamic
Make, carries out ingredient by formula.
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| CN111251491B (en) * | 2018-12-03 | 2022-02-22 | 宁波优禾新材料科技有限公司 | A equipment for masterbatch production |
| CN110538609A (en) * | 2019-07-18 | 2019-12-06 | 中山市马里奥机械科技有限公司 | Metering system of static mixer |
| KR20220049407A (en) | 2020-10-14 | 2022-04-21 | 삼성전자주식회사 | Display apparatus and control method thereof |
| CN112976290B (en) * | 2021-02-08 | 2022-06-10 | 沈阳建筑大学 | Concrete pouring automatic compensation control method for prefabricated parts |
| CN112945361B (en) * | 2021-03-12 | 2022-09-23 | 四川仲玛智造科技有限公司 | Vibrating type accurate weighing equipment |
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Effective date of registration: 20231124 Address after: Room 407-10, floor 4, building 2, Haichuang science and technology center, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province, 311100 Patentee after: Zhejiang Zhiduo Network Technology Co.,Ltd. Address before: 310018, No. 258, source street, Xiasha Higher Education Park, Hangzhou, Zhejiang Patentee before: China Jiliang University |