CN110091428B - Discharging device and method capable of automatically adjusting discharging amount - Google Patents
Discharging device and method capable of automatically adjusting discharging amount Download PDFInfo
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- CN110091428B CN110091428B CN201910449773.0A CN201910449773A CN110091428B CN 110091428 B CN110091428 B CN 110091428B CN 201910449773 A CN201910449773 A CN 201910449773A CN 110091428 B CN110091428 B CN 110091428B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000007599 discharging Methods 0.000 title abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 41
- 238000007789 sealing Methods 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 20
- 238000005303 weighing Methods 0.000 claims description 20
- 230000008859 change Effects 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 15
- 230000003993 interaction Effects 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- 230000003750 conditioning effect Effects 0.000 claims description 11
- 230000002159 abnormal effect Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 238000013507 mapping Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims 2
- 102100035115 Testin Human genes 0.000 claims 1
- 101710070533 Testin Proteins 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 239000000806 elastomer Substances 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 238000010998 test method Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/023—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities
- B28B13/0235—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities the feed box being provided with agitating means, e.g. stirring vanes to avoid premature setting of the moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/023—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities
- B28B13/0245—Rotatable feed frames, e.g. horizontally rotated over 90 degrees
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/023—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities
- B28B13/025—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities the feed box being vibrated, e.g. to promote discharging of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/0063—Control arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention provides a blanking device and a blanking method capable of automatically adjusting blanking amount, wherein the device is arranged above a die conveying track of a precast slab production line and comprises a frame, a feed bin, a hopper, a loading device, a rotary blanking valve and a controller, wherein the feed bin, the hopper, the loading device, the rotary blanking valve and the controller are sequentially communicated from top to bottom, the loading device is arranged on the frame, the feed bin, the hopper, the rotary blanking valve and the built-in slurry weight are applied to a loading end of the loading device, and a data interface of the loading device is electrically connected to the controller. The device acquires the discharging amount of the loading device in one discharging period through the controller, and adjusts the rotating speed of the impeller of the rotary discharging valve on line, so as to realize the purpose of automatically adjusting the discharging amount; the on-line sliding filter can eliminate on-site mechanical vibration interference and pulse interference, improves the precision of blanking amount detection, and meets the real-time requirement of on-line monitoring; the device compact structure, degree of automation is high, can improve work efficiency and product quality.
Description
Technical Field
The invention belongs to the technical field of prefabricated plate manufacturing, and particularly relates to a blanking device and method capable of automatically adjusting blanking amount.
Background
At present, prefabricated panels are widely used in building construction, and are generally produced by adopting a prefabricated panel production system formed by flat dies, wherein the prefabricated panel production system generally comprises a die conveying system, a distributing system and a grid cloth laying system, a discharging device is arranged in the distributing system, and the discharging device is one of key components and is used for controlling slurry to enter a forming die according to a preset quantity.
According to different application occasions, the thicknesses of the precast slabs are different, so that the blanking amount of the slurry entering the forming die in unit time is required to be accurately controlled to obtain different material layer thicknesses, the current common practice is to adjust the blanking amount by manually adjusting the opening of the blanking valve, the accuracy is poor, time and labor are wasted, and the online operation cannot be realized.
The existing blanking device generally adopts a blanking valve to control blanking quantity, the blanking valve is generally provided with a turning plate blanking valve and a rotary blanking valve, the blanking quantity of the turning plate blanking valve is related to the size of a feeding hole, the blanking quantity of slurry in a storage bin and a hopper is also related to the self weight of the slurry in the storage bin and the hopper, and uneven blanking quantity easily occurs in a discharging period, so that uneven thickness of a precast slab is caused, and particularly for a gel material with strong fluidity, the flow control is poor, and the blanking accuracy is poor; the rotary blanking valve realizes constant volume feeding by the rotation of the impeller, and the flow control of the rotary blanking valve on materials is better than that of a flap valve, but in the existing rotary blanking valve, the impeller is usually made of metal, so that the rotation of the impeller is not influenced, the friction between the impeller and the inner wall of a valve body is avoided, and a small gap is reserved between the impeller and the valve body. The impeller has poor tightness, slurry is easy to leak from a gap, and the blanking precision is affected; in addition, in the actual operation process, tiny sand and stone are easy to clamp in the gap between the impeller and the valve body, so that friction of the rotary blanking valve is increased, the impeller is easy to damage and even cannot operate, and production continuity is affected.
In addition, for the cementing material with poor fluidity and high cohesiveness, the slurry in the hopper is easy to wall, and the problem of unsmooth discharging can be generated.
Therefore, how to make the blanking amount of the prefabricated plate blanking device more accurate and smooth is an urgent problem to be solved in the industry.
Disclosure of Invention
Aiming at the defects, the invention aims to provide the blanking device which is accurate, efficient, time-saving and labor-saving and can automatically adjust the blanking amount, and is particularly suitable for occasions of gel slurry with poor fluidity and higher viscosity.
The technical scheme adopted by the invention is as follows:
but unloader of automatically regulated unloading volume installs in prefabricated plate production line's mould delivery track's top, including frame (07) and feed bin (02), hopper (03), gyration unloading valve (01), loading device (05) and controller (08) that communicate in proper order from last to down, loading device (05) are installed on frame (07), and feed bin (02), hopper (03) and gyration unloading valve (01) and built-in ground paste weight all are applyed at loading device's (05) load end, and loading device's (05) data interface electricity is connected to controller (08).
In the blanking device, the load device (05) comprises a weighing sensor (051), a signal conditioning circuit (052) and a signal processing unit (053), wherein the weighing sensor (051) is positioned at the load end of the load device (05) and converts pressure generated by the born weight into an electric signal; the signal conditioning circuit (052) comprises an amplifying and filtering circuit and is used for amplifying and filtering the electric signal output by the weighing sensor (051); the signal processing unit (053) comprises an A/D converter and a processor, the A/D converter converts an analog signal output by the signal conditioning circuit (052) into a digital signal, and the processor processes, stores and transmits the obtained digital signal to the controller (08).
Among the above-mentioned unloader, weighing sensor (051) is resistance strain type weighing sensor, including elastomer, paste resistance strain gauge and the detection circuitry on the elastomer, landing leg (031) that the lateral wall was equipped with on hopper (03) upper end supports on weighing sensor (051) elastomer, elastic buffer pad has been laid between elastomer and landing leg (031), and the resistance of resistance strain gauge changes along with the deformation of resistance strain gauge on the elastomer, and detection circuitry changes the resistance of resistance strain gauge and changes into voltage signal.
In the blanking device, the rotary blanking valve comprises a valve body (4) provided with a cavity and a mandrel (3) arranged in the cavity of the valve body (4), the end part of the mandrel (3) extending out of the valve body (4) is connected with an output shaft of a motor (9), and the motor (9) is electrically connected to the controller (08); an impeller (8) is arranged in a cavity of the valve body (4), the impeller (8) is a plurality of plate-type blades which are arranged on the periphery of the mandrel (3) at intervals, flexible sealing plates (7) are fixed at the free ends of at least two blades, and the flexible sealing plates (7) are tightly contacted with the inner wall of the cavity of the valve body (4).
In the blanking device, the flexible sealing plate (7) is made of rubber, and the flexible sealing plate (7) is sleeved with the free ends of the blades or fixed through bolts; the free end of each blade is fixed with a flexible sealing plate (7) or the blades of which the free ends are fixed with the flexible sealing plates (7) are arranged at intervals with the blades of which the free ends are not fixed with the flexible sealing plates (7).
In the blanking device, an inlet of the hopper (03) is connected with an outlet of the stock bin (02) through a partition plate, the opening and closing of the partition plate are driven by a discharge valve, and a vibrator (06) is arranged on the outer side wall of the hopper (03); the upper portion of feed bin (02) is equipped with raw materials entry (021) and mixer (04), and the discharge valve of the actuating mechanism of drive baffle opening/closing of drive vibrator (06) and mixer (04) are connected to controller (08) electrically respectively.
In the above-mentioned unloader, controller (08) include the treater and be connected to the memory cell and the human-computer interaction unit of treater electricity, wherein:
The method comprises the steps that a processor (08) obtains preset parameters from a human-computer interaction unit, and calculates and obtains a motor rotating speed V1, a vibration frequency of a vibrator (06), a stirring speed V2 of the stirrer (04) and a theoretical blanking amount of a blanking period T1 according to the obtained preset parameters, wherein the preset parameters comprise a performance index of gel materials, a material layer thickness value TH, a specification L multiplied by K of a forming die, a travelling speed V3 of the forming die, the blanking period T1, the number N1 of impellers of a rotary blanking valve and an effective volume VL of a blanking cavity; or alternatively
The processor (08) obtains the corresponding motor rotating speed V1, the vibration frequency of the vibrator (06), the stirring speed V2 of the stirrer (04) and the theoretical blanking amount of a blanking period through a mapping table of preset parameters stored in the memory and the running speed V1 of the motor (9), the vibration frequency of the vibrator (06), the stirring speed V2 of the stirrer (04) and the theoretical blanking amount of the blanking period.
The invention also provides a blanking method capable of automatically adjusting the blanking amount, which adopts any one of the above blanking devices to operate, and comprises the following steps:
Step 1, a controller (08) acquires preset parameters of a precast slab, divides the blanking process into a plurality of blanking periods T1, and obtains control parameters of a motor (9) and theoretical blanking amount of one blanking period T1 according to the acquired preset parameter values, wherein the control parameters comprise a preset rotating speed range and a running speed V1 of the motor (9); acquiring performance indexes of gel materials, and acquiring the vibration frequency of a corresponding vibrator (06) and the stirring speed V2 of a stirrer (04);
Step 2, a controller (08) controls the stirrer (04) to stir raw materials to form slurry according to the obtained stirring speed V2 of the stirrer (04), and a discharge valve is opened after stirring is completed to enable the slurry to enter a hopper (03); the controller (08) closes the stirrer (04) and the discharge valve, and vibrates the vibrator (06) according to the vibration frequency of the vibrator (06) so as to increase the fluidity of the slurry;
And 3, the controller (08) controls the motor (9) to drive the impeller of the rotary blanking valve (01) to rotate according to the acquired control parameters, so that blanking in one blanking period is completed, meanwhile, the weight change of the blanking device in the blanking period fed back by the load device (05) is received, namely, the actual blanking amount in the blanking period is compared with the theoretical blanking amount, the controller (8) adjusts the rotating speed of the impeller of the rotary blanking valve (01) according to the comparison result, namely, the running speed V1 of the motor (9), and the blanking amount is automatically adjusted.
In the blanking method capable of automatically adjusting the blanking amount, in the step 3, a controller (08) processes weight data acquired by a loading device (05) by adopting an online sliding filter to acquire the actual blanking amount of a blanking period T1;
The actual blanking amount is compared with the theoretical blanking amount: if the difference between the actual and theoretical discharge amounts is greater than an allowable range value (the allowable range value is preset), the operation speed V1 of the motor (9) of the rotary discharge valve (01) is adjusted within a preset rotation speed range until the obtained difference between the actual and theoretical discharge amounts is within the allowable range.
In the blanking method capable of automatically adjusting the blanking amount, the implementation steps of the online sliding filter are as follows:
Step S0, determining a sampling period T2 of the weight data collected by the load device according to the number N1 of impellers of the rotary blanking valve and the effective volume VL of the material cavity; initializing two queues R1 and R2 (first-in first-out), wherein the length of the queues is N, n=int (T1/T2), and N is a natural number;
Step S1, calculating the blanking amount of a blanking period;
The method specifically comprises the following steps: the load device collects weight data, the weight data in the queue R1 sequentially move towards the queue head, the detected weight data are put into the queue tail of the queue R1, and if the queue head data in the queue R1 are not empty, the blanking quantity delta W=R (1) -R (N) of a first complete blanking period is obtained; if the queue head data in the queue R1 is empty, repeating the step S1;
s2, eliminating abnormal values;
the method specifically comprises the following steps: sequentially moving the blanking amount in the queue R2 towards the queue head, putting the acquired blanking amount data delta W into the queue tail of the queue R2, if the queue head data in the queue R2 is not empty and N is more than 15, adopting a Laider criterion to reject abnormal values of N blanking amount data in the queue R2, and if the blanking amount data are rejected, repeating the steps S1 and S2;
If the queue head data in the queue R2 is not empty and N is less than or equal to 15, adopting a Grabbs test method to reject abnormal values of N blanking amount data in the queue R2; if the blanking amount data is removed, repeating the steps S1 and S2;
If the queue head data in the queue R2 is empty, repeating the steps S1 and S2;
step S3, obtaining the average value of the blanking amount data in the queue R2 As the actual blanking amount of the current blanking period.
The beneficial effects of the invention are as follows:
(1) The device adopts the rotary blanking valve to realize constant volume feeding, controls the blanking amount by controlling the rotating speed of the impeller flexibly connected with the valve body, monitors the weight change of the hopper in one blanking period on line by the loading device, feeds back the weight change to the controller, and the controller adjusts the rotating speed of the impeller of the rotary blanking valve on line according to a feedback signal so as to ensure the blanking amount to be basically constant in one blanking period and realize the aim of automatically adjusting the blanking amount according to the thickness of a material layer of a precast slab;
(2) The online sliding filter can eliminate interference signals such as mechanical vibration, noise and the like in the blanking process of the on-site vibrator and the rotary blanking valve and pulse interference signals in the detection process, improves the precision of blanking amount detection, and meets the real-time requirement of online monitoring of the blanking amount;
(3) For gel materials with poor fluidity and high viscosity, the controller automatically adjusts the frequency of the vibrator and the stirring speed of the stirrer according to the obtained performance indexes of the raw materials, so that the fluidity of the slurry is increased, uniform and stable discharging is facilitated, and the problems of wall hanging and unsmooth discharging of the slurry in a hopper are solved.
The device compact structure, degree of automation is high, can save the cost of labor, improves work efficiency and product quality.
Drawings
FIG. 1 is a schematic structural view of a blanking apparatus of the present invention;
FIG. 1A is an enlarged schematic view of area A of FIG. 1;
FIG. 2 is a block diagram of the electrical connection of the load device;
FIG. 3 is a schematic diagram of the structure of a rotary blanking valve;
fig. 4 is a cross-sectional view taken along line B-B in fig. 3.
The reference numerals in the drawings are as follows:
01-rotating a blanking valve; 02-bin, 021-raw material inlet; 03-hopper, 031-leg; 04-stirring machine;
05-a load device, 051-a weighing sensor, a 052-a signal conditioning circuit, a 053-a signal processing unit and a mounting base 054;
06-a vibrator; 07-a frame; 08-a controller;
1-a feed inlet, 2-a sealing end cover, 3-a mandrel, 4-a valve body, 5-a discharge outlet, 6-an overhaul port, 7-a flexible sealing plate, 8-an impeller and 9-a motor.
Detailed Description
In order to solve the problems of low automation degree, uneven blanking amount, easy clamping and easy damage of a blanking valve, low blanking amount control precision and the like in a blanking device in the existing precast slab production system, the invention provides a blanking device and a blanking method capable of automatically adjusting the blanking amount.
The following describes in detail the blanking device and method capable of automatically adjusting the blanking amount according to the present invention with reference to the examples and the accompanying drawings.
Device and method for controlling the same
Fig. 1 is a structural example of the blanking apparatus of the present invention. As shown in fig. 1, the blanking device is installed above a die conveying track of a prefabricated plate production line, and comprises a stock bin 02, a hopper 03, a loading device 05 and a rotary blanking valve 01 which are sequentially communicated from top to bottom, wherein:
As shown in fig. 1, the hopper 03 has a conical structure with a wide upper part and a narrow lower part, an inlet of the hopper 03 is connected with an outlet of the bin 02 through a partition plate, and the opening and closing of the partition plate are driven by a discharge valve; the outlet of the hopper 03 is communicated with the feed inlet 1 of the rotary blanking valve 01; the vibrator 06 is arranged on the outer side wall of the hopper 03, slurry in the hopper 03 is activated through vibration of the vibrator 06, slurry blocking and wall hanging phenomena can be effectively eliminated, the problem of unsmooth discharge of the hopper 03 is solved, and the vibrator 06 has different vibration frequencies according to performance indexes (including fluidity and viscosity) of slurry (usually gel materials) in an optimized mode; in one embodiment, the outlet end of the bin 02 is welded to the inlet end of the hopper 03, and the outlet end of the hopper 03 is mechanically connected to the inlet end of the rotary blanking valve 01.
The feed bin 02 is cylindrical structure, and upper portion is equipped with raw materials entry 021 and mixer 04, and the bottom of feed bin 02 passes through the discharge valve and the entry linkage of hopper 03, and the raw materials gets into feed bin 02 from the raw materials entry 021 of feed bin 02, and at this moment, the discharge valve is closed, and the continuous stirring of mixer 04 makes the raw materials mix evenly in feed bin 02 and forms the ground paste, opens the discharge valve back ground paste entering hopper 03 stores.
In one embodiment, the loading device 05 is mounted on a leg 031 arranged on the outer side wall of the upper end of the hopper 03, and bears the weight of the stock bin 02, the hopper 03, the rotary blanking valve 01 and slurry therein, and the loading device 05 is used for weighing the blanking amount of the hopper 03 in a time period (which can be set according to requirements).
In the embodiment shown in fig. 1A and 2, the load device 05 includes a load cell 051, a signal conditioning circuit 052, a signal processing unit 053 and a mounting base 054, as in the embodiment shown in fig. 1A, the load cell 051 is fixed on the mounting base 054, the mounting base 054 is fixed on a frame 07, it is understood that the mounting base 054 may be fixed on other mechanisms, and the shape and the mounting position of the mounting base 054 are not limited by the present invention; the load end of the load device 05 is connected with the supporting leg 031 of the hopper 03, and the weighing sensor 051 is located at the load end, so that the weight of the stock bin 02, the hopper 03, the rotary blanking valve 01 and slurry in the rotary blanking valve are transmitted to the weighing sensor 051, the pressure generated by the weight is converted into an electric signal by the weighing sensor 051, and the electric signal output by the weighing sensor 051 is electrically connected with the signal processing unit 053 through the signal conditioning circuit 052. In the embodiment shown in fig. 2, the signal conditioning circuit 052 includes an amplifying filter circuit for amplifying the electric signal output by the load cell 051 and filtering out the ripple wave in the electric signal; the signal processing unit 053 includes an a/D converter for converting the analog signal processed by the signal conditioning circuit 052 into a digital signal, and a processor for processing, storing, and transmitting the obtained digital signal to the and controller 08.
In one embodiment, the load cell 051 is a resistive strain gauge load cell, and includes an elastomer (elastic element), a resistive strain gauge (conversion element) attached to the elastomer, and a detection circuit, wherein the leg 031 of the hopper 03 is supported on the elastomer of the load cell 051, the weight change of the hopper 02, the hopper 03, the rotary blanking valve 01 and the slurry therein is applied to the elastomer, the deformation of the resistive strain gauge attached to the elastomer is changed, the resistance value of the resistive strain gauge is changed, and the detection circuit converts the resistance value change of the resistive strain gauge into a voltage signal and outputs the voltage signal. Preferably, an elastic buffer pad, such as a rubber pad, is laid between the elastic body and the leg 031 for buffering and reducing vibration interference generated during the weighing process.
The rotary blanking valve 01 is arranged at the outlet of a hopper 01 for storing slurry, and in the embodiment shown in fig. 3 and 4, the rotary blanking valve 01 comprises a valve body 4 and a mandrel 3 arranged in the middle of the valve body 4, the upper part of the valve body 4 is provided with a feed inlet 1, the lower part is provided with a discharge outlet 5, and two ends of the valve body 4 are respectively provided with a sealing end cover 2; the inside of valve body 4 is equipped with the cavity, and dabber 3 locates in the cavity of valve body 4, and the both ends of dabber 3 are respectively supported on two seal end covers 2 of valve body 4 through the bearing, and the end that dabber 3 stretches out valve body 4 is connected with the output shaft of a motor 9, and the dabber can rotate under the drive of motor 9.
An impeller 8 is arranged in the cavity of the valve body 4, the impeller 8 is a plurality of plate-type blades which are arranged at intervals in the circumferential direction of the mandrel 3, and adjacent blades and the inner wall of the valve body 4 form an independent material cavity; the free ends of at least two blades are fixed with a flexible sealing plate 7, and the flexible sealing plate 7 has certain elasticity, and is tightly contacted with the inner wall of the cavity of the valve body 4 through self Zhang Liya on the inner wall of the cavity of the valve body 4, so that flexible sealing is realized, and sand and stone are prevented from being blocked in the running process of the impeller; preferably, the blades of the two free ends fixed with the flexible sealing plate 7 are symmetrically arranged, and in the running process of the impeller, the flexible sealing plate 7 can clean slurry (gel materials for example) or sand stuck on the inner wall of the valve body 4, so that the impeller is prevented from being blocked by the sand and the work is influenced. In one embodiment, the flexible sealing plate 7 is made of rubber.
In one embodiment, the flexible sealing plate 7 is plate-shaped with the same width as the blade, preferably, the free end of the flexible sealing plate 7 is arc-shaped and matches the inner wall of the valve body 4.
In one embodiment, a flexible sealing plate 7 is fixed at the free end of each blade, or the blades of the flexible sealing plate 7 fixed at the free end and the blades of the flexible sealing plate 7 not fixed at the free end are arranged at intervals, so that gaps between the free ends of the blades and the inner wall of the valve body 4 are eliminated as much as possible, slurry leakage is prevented in the running process of the impeller, and the blanking precision is further ensured.
The flexible sealing plate 7 and the free end of the blade may be fixed by sleeving or bolting, for example, when the flexible sealing plate 7 is made of plate-shaped rubber with the same width as the blade, the flexible sealing plate 7 may be sleeved on the free end of the blade by using its elasticity, or the end of the flexible sealing plate 7 may be screwed with the free end of the blade by bolting.
In one embodiment, in order to facilitate maintenance or replacement of the impeller 8 and the flexible sealing plate 7 mounted in the cavity of the valve body 4, the side surface of the valve body 4 is provided with at least one access opening 6, and when the rotary blanking valve 01 works, the access opening 6 is buckled and sealed through a cover; the impeller 8 and flexible seal plate 7 can be opened when maintenance or replacement is required.
In one embodiment, the motor 9 driving the spindle 3 to rotate is a speed reducing motor with a speed regulating function, and the gear of the speed reducing motor can be regulated according to production requirements to drive the spindle 3 and the impeller 8 to rotate at a preset speed, so that the blanking amount is accurately controlled.
The working process of the rotary blanking valve is as follows: the motor drives the dabber 3 that is located the cavity of valve body 4 to rotate, and then drives impeller 8 that is fixed in dabber 3 to rotate, and the rotation in-process sets up flexible closing plate 7 and the cavity inner wall of valve body 4 at the blade tip of impeller 8 and pastes tightly, and the ground paste in hopper 01 gets into between the blade of impeller 8 from feed inlet 1, and the ground paste between the blade changes to below discharge gate 5 department, and the material falls into wallboard forming die. In a preset rotating speed range (when the viscosity of the material is high, the rotating speed is not higher than the highest allowable rotating speed, and when the viscosity is higher, the material cavity where the material is located is not faster than the discharging cavity and is taken away by the impeller when the material reaches the discharging hole 5, but the discharging quantity is smaller, so that the passing speed of the forming die is required to be slowed down, the rotating speed of the rotary discharging valve is controlled to be in the preset range at the same time), and the rotating speed of the motor is higher, the corresponding rotating speed of the impeller 8 is higher, and the discharging quantity is higher in unit time, so that the aim of accurately controlling discharging is fulfilled.
The rotary blanking valve is simple in structure and convenient to use, the blanking amount can be accurately controlled by controlling the rotation speed of the impeller, and gaps between free ends of blades and the inner wall of the valve body 4 can be eliminated by arranging the flexible sealing plate 7 at the end parts of the blades of the impeller 8, so that sand and stones are prevented from being blocked between the impeller and the inner wall of the cavity of the valve body 4 to cause the impeller to be damaged or not to operate, the service life of the rotary blanking valve is prolonged, and the cost is reduced; by providing the access opening 6 in the side of the valve body 4, maintenance or replacement of the impeller 8 and the flexible sealing plate 7 is facilitated.
In the embodiment shown in fig. 1, the discharging device of the present invention further comprises a controller 08, and the driving mechanism of the mixer 04, the data interface of the loading device 05, the driving mechanism of the vibrator 06, the driving mechanism of the motor 9 of the rotary discharging valve 01, and the discharging valve for driving the partition plate to open/close are electrically connected to the controller 08, respectively. The controller 08 comprises a processor, a storage unit and a man-machine interaction unit, wherein the storage unit and the man-machine interaction unit are electrically connected to the processor, the processor obtains preset parameters from the man-machine interaction unit, and calculates and obtains a motor rotating speed V1, a vibration frequency of the vibrator 06, a stirring speed V2 of the stirrer 04 and a theoretical blanking amount in a blanking period according to the obtained preset parameters, wherein the preset parameters comprise performance indexes (including flowability and viscosity) of gel materials, a material layer thickness TH, a specification L multiplied by K (length multiplied by width) of a forming die, a travelling speed V3 of the forming die, a blanking period T1, the number N1 of impellers of a rotary blanking valve and an effective volume VL of a material cavity; or obtaining the corresponding motor rotation speed V1, the vibration frequency of the vibrator 06 and the stirring speed V2 of the stirrer 04 through a mapping table of preset parameters stored in a memory and the running speed V1 of the motor 9, the vibration frequency of the vibrator 06 and the stirring speed V2 of the stirrer 04, wherein the mapping table can be obtained according to calculation, experiment or experience values; in a blanking period, the processor generates a control command according to the acquired motor rotation speed and sends the control command to the driving mechanism of the motor 9, the driving motor 9 rotates according to the corresponding motor rotation speed, meanwhile, the load device 05 monitors the weight change of the blanking device on line and feeds the weight change back to the controller 08, the controller 08 generates a control command through a weight change signal (blanking amount in one blanking period) fed back, the rotation speed of the rotary blanking valve 01 is regulated on line, the blanking amount is accurately controlled, manual participation is not needed, and the degree of automation is improved. In addition, in the working process of the blanking device, the controller 08 controls the stirrer 04, the vibrator 06 and the discharge valve to work according to a preset time sequence. In one embodiment, the human-computer interaction unit may be a touch screen provided with a human-computer interaction interface.
The blanking device is assembled according to the connection relation, and the blanking device is positioned above a die conveying track of a prefabricated plate production system, so that the aim of automatically adjusting the blanking amount according to the material layer thickness of the prefabricated plate is fulfilled. The device adopts the rotary blanking valve 01 to realize constant volume feeding, controls the blanking amount by controlling the rotating speed of the impeller flexibly connected with the valve body 4, monitors the weight change of the blanking device in one blanking period on line by the loading device 05, feeds back the weight change to the controller 08, and ensures that the blanking amount is basically constant in one blanking period by the controller 08 according to the rotating speed of the impeller of the rotary blanking valve 01 regulated by the feedback signal; for gel materials with poor fluidity and high viscosity, the controller automatically adjusts the frequency of the vibrator 06 and the stirring speed of the stirrer 04 according to the obtained raw material performance indexes, so as to increase the fluidity of the slurry, be beneficial to uniform and stable discharging, and solve the problems of wall hanging and unsmooth discharging of the slurry in the hopper 03. The device has compact structure, saves labor cost, and improves working efficiency and product quality.
Method of
The blanking device adopts the loading device 05 to monitor the blanking amount of the blanking device on line, and the blanking amount can be adjusted on line through the on-line feedback of the blanking amount. Because the weighing sensor 051 of the load device 05 is influenced by mechanical vibration generated by the vibrator 06 and disturbance generated by materials in the blanking process in the measuring process, the accuracy of the blanking amount detected by the load device 5 is influenced; in addition, the material in the rotary blanking valve 01 is located in an independent material cavity formed by adjacent blades and the inner wall of the valve body, when the material cavity is transferred to the discharge port 5 of the rotary blanking valve 01, the material can fall from the discharge port 5, when the discharge port 5 is small (for example, only a part of the outlet of one material cavity can be covered), the blanking of the rotary blanking valve 01 can be discontinuous, and when the load device 05 continuously samples, errors can be caused, even invalid data (data acquired during a blanking period) can be acquired, and the obtained blanking amount data is invalid, so that in order to improve the accuracy of the blanking amount on-line monitoring, the discharge port 5 of the rotary blanking valve 01 is optimally designed to cover at least the outlet of one complete material cavity, and preferably, the discharge port 5 covers the discharge ports of two material cavities. At this time, the blanking process is basically uniform and continuous at the same rotating speed.
Based on the above-mentioned blanking device, the invention provides a blanking method capable of automatically adjusting blanking amount, comprising the following steps:
step 1, a controller 08 obtains preset parameters of a precast slab, and obtains control parameters of a motor 9 and theoretical blanking amount in a blanking period according to the obtained preset parameter values, wherein the control parameters comprise a preset rotating speed range and an operating speed V1 of the motor 9; performance indexes (such as flow property and viscosity) of the gel material are obtained, and the vibration frequency of the corresponding vibrator 06 and the stirring speed V2 of the stirrer 04 are obtained.
The obtained material layer thickness value, the control parameter of the motor 9, the performance index data of the gel material, the vibration frequency of the vibrator 06 and the stirring speed of the stirrer 04 can be manually input through a man-machine interaction unit of the controller 08, or can be automatically obtained through a mapping table of the material layer thickness TH1 and the running speed V1 of the motor 9, which are pre-stored on a storage unit, and a mapping table of the performance index of the gel material, the vibration frequency of the vibrator 06 and the stirring speed V2 of the stirrer 04, and in general, the gel materials with different performances have different corresponding preset rotating speed ranges (namely the rotating speed range of the rotary blanking valve 01) of the motor 9, and the running speed V1 of the motor 9 is usually limited in the preset rotating speed range.
Step 2, the controller 08 controls the stirrer 04 to stir raw materials to form slurry according to the obtained stirring speed V2 of the stirrer 04, and after stirring is completed, a discharge valve is opened to enable the slurry to enter the hopper 03; the controller 08 closes the mixer 04 and the discharge valve to vibrate the vibrator 06 according to the vibration frequency of the vibrator 06 to increase the fluidity of the slurry.
Step 3, the controller 08 controls the motor 9 to drive the impeller of the rotary blanking valve 01 to rotate according to the obtained control parameter, and at the same time, receives the weight change of the blanking device in one blanking period fed back by the load device 05, namely, the actual blanking amount in one blanking period, and the controller 8 compares the obtained actual blanking amount with the theoretical blanking amount and adjusts the impeller rotating speed of the rotary blanking valve 01 (namely, the running speed V1 of the motor 9) according to the comparison result.
The controller 08 generates a control command according to the acquired control parameters of the motor 9 and sends the control command to the driving mechanism of the motor 9 to control the motor 9 to drive the impeller to rotate; the controller 08 receives the weight change of the hopper 03 in a blanking period fed back by the loading device 05, and increases the impeller rotating speed of the rotary blanking valve 01 in a preset rotating speed range when the blanking amount in the unit blanking period is smaller than a preset value; and when the blanking amount in the blanking period is larger than a preset value, reducing the rotating speed of the impeller of the rotary blanking valve 01 in a preset rotating speed range.
In step 3, the controller 08 processes the weight data acquired by the loading device 05 by using an online sliding filter to acquire an actual blanking amount in a blanking period.
The actual blanking amount is compared with the theoretical blanking amount: if the difference between the actual discharge amount and the theoretical discharge amount is greater than the allowable range value (the allowable range value is preset), the operation speed V1 of the motor 9 of the rotary discharge valve 01 is adjusted within the predetermined rotation speed range until the obtained difference between the actual discharge amount and the theoretical discharge amount is within the allowable range.
In the above steps, the online sliding filter performs the following steps:
Step S0, determining a sampling period T2 of the weight data collected by the load device 05 according to the number N1 of impellers of the rotary blanking valve and the effective volume VL of the material cavity; two queues R1 and R2 (first-in first-out) are initialized, the length of the queues being N, n=int (T1/T2) (N is a natural number).
And S1, calculating the blanking amount of a blanking period.
The method specifically comprises the following steps: the loading device 05 collects weight data, the weight data in the queue R1 sequentially move towards the queue head, the detected weight data are put into the queue tail of the queue R1, and if the queue head data in the queue R1 are not empty, the blanking quantity delta W=R (1) -R (N) of a first complete blanking period is obtained; if the queue head data in the queue R1 is empty, the step S1 is repeated.
Because the weight measured by the load device 05 comprises the stock bin 02, the hopper 03, the rotary blanking valve 01 and slurry in the hopper 03, the weight change of each sampling is relative to the measured weight, or the blanking amount in one period is relative to the measured weight, the ratio is small, and the signal processing is not facilitated; the blanking amount of the blanking period is calculated, the blanking amount is sensitive to abnormal blanking and vibration influence, and the blanking amount detection precision can be improved through filtering treatment.
And S2, eliminating abnormal values.
The method specifically comprises the following steps: sequentially moving the blanking amount in the queue R2 towards the queue head, putting the acquired blanking amount data delta W into the queue tail of the queue R2, if the queue head data in the queue R2 is not empty and N is more than 15, adopting a Laider criterion to reject abnormal values of N blanking amount data in the queue R2, and if the blanking amount data are rejected, repeating the steps S1 and S2;
If the queue head data in the queue R2 is not empty and N is less than or equal to 15, adopting a Grabbs test method to reject abnormal values of N blanking amount data in the queue R2; if the blanking amount data is removed, repeating the steps S1 and S2;
If the queue head data in the queue R2 is empty, steps S1 and S2 will be repeated.
Step S3, obtaining the average value of the blanking amount data in the queue R2As the actual blanking amount of the current blanking period.
According to different sampling frequencies in the blanking period, an outlier rejection algorithm combining the Lat criterion and the Grabbs test method is adopted, so that the influence of outliers on smooth filtering precision is eliminated, namely when the sampling frequency is larger (N is larger), the outliers are rejected by adopting a simpler Lat criterion, the calculation resources are saved, and the real-time requirement is met; when the sampling frequency is smaller (N is smaller), a Grabbs test method with a definite probability meaning is adopted to prevent rule failure; the online sliding filter can eliminate interference signals such as mechanical vibration, noise and the like in the blanking process of the on-site vibrator 06 and the rotary blanking valve 01 and pulse interference signals in the detection process, improves the precision of blanking quantity detection, and meets the real-time requirement of online monitoring of the blanking quantity.
It will be appreciated by those skilled in the art that these examples are intended to illustrate the invention and not to limit the scope of the invention, and that various equivalent variations and modifications to the invention are within the scope of the present disclosure.
Claims (2)
1. The blanking device capable of automatically adjusting the blanking amount comprises a frame (07) and a feed bin (02), a hopper (03) and a rotary blanking valve (01) which are sequentially communicated from top to bottom, and is characterized by further comprising a loading device (05) and a controller (08), wherein the loading device (05) is arranged on the frame (07), the feed bin (02), the hopper (03) and the rotary blanking valve (01) and the weight of built-in slurry are applied to the loading end of the loading device (05), and a data interface of the loading device (05) is electrically connected to the controller (08); the load device (05) comprises a weighing sensor (051), a signal conditioning circuit (052) and a signal processing unit (053), wherein the weighing sensor (051) is positioned at the load end of the load device (05) and converts the pressure generated by the born weight into an electric signal; the signal conditioning circuit (052) comprises an amplifying and filtering circuit and is used for amplifying and filtering the electric signal output by the weighing sensor (051); the signal processing unit (053) comprises an A/D converter and a processor, the A/D converter converts an analog signal output by the signal conditioning circuit (052) into a digital signal, and the processor processes and stores the obtained digital signal and transmits the digital signal to the controller (08); the weighing sensor (051) is a resistance strain type weighing sensor and comprises an elastic body, a resistance strain gauge and a detection circuit, wherein the resistance strain gauge is adhered to the elastic body, a supporting leg (031) arranged on the outer side wall of the upper end of the hopper (03) is supported on the elastic body of the weighing sensor (051), the resistance value of the resistance strain gauge is changed along with the deformation of the resistance strain gauge on the elastic body, and the detection circuit converts the resistance value change of the resistance strain gauge into a voltage signal; the rotary blanking valve comprises a valve body (4) provided with a cavity and a mandrel (3) arranged in the cavity of the valve body (4), the end part of the mandrel (3) extending out of the valve body (4) is connected with an output shaft of a motor (9), and the motor (9) is electrically connected to a controller (08); an impeller (8) is arranged in a cavity of the valve body (4), the impeller (8) is a plurality of plate-type blades which are arranged at intervals on the circumference of the mandrel (3), flexible sealing plates (7) are fixed at the free ends of at least two blades, and the flexible sealing plates (7) are tightly contacted with the inner wall of the cavity of the valve body (4); the flexible sealing plate (7) is made of rubber, and the flexible sealing plate (7) is sleeved with the free ends of the blades or fixed through bolts; the free end of each blade is fixed with a flexible sealing plate (7) or the blades of which the free ends are fixed with the flexible sealing plates (7) are arranged at intervals with the blades of which the free ends are not fixed with the flexible sealing plates (7); the inlet of the hopper (03) is connected with the outlet of the stock bin (02) through a partition plate, the opening and closing of the partition plate are driven by a discharge valve, and a vibrator (06) is arranged on the outer side wall of the hopper (03); the upper part of the feed bin (02) is provided with a raw material inlet (021) and a stirrer (04), and a driving mechanism of the stirrer (04), a driving mechanism of the vibrator (06) and a discharge valve for driving the partition plate to open/close are respectively and electrically connected to a controller (08); the controller (08) comprises a processor, a storage unit and a man-machine interaction unit, wherein the storage unit and the man-machine interaction unit are electrically connected to the processor, and the man-machine interaction unit comprises:
The processor (08) obtains the preset parameters from the man-machine interaction unit, and calculates the motor rotation speed according to the obtained preset parameters Vibration frequency of vibrator (06) and stirring speed of stirrer (04)/>, and method for producing the sameOne blanking period/>The preset parameters comprise the performance index of the gel material, the material layer thickness value/>Specification of forming die/>，/>For the length of the forming die,/>Is the width of the forming die, the travelling speed of the forming die/>Blanking period/>Impeller number/>, of rotary blanking valveEffective volume of the mixing cavity/>; Or the processor (08) and the operating speed/>, of the motor (9) through preset parameters stored in a memoryVibration frequency of vibrator (06), stirring speed of stirrer (04)/>, and method for producing the sameAnd a mapping table of theoretical blanking amount of a blanking period to obtain corresponding motor rotation speed/>Vibration frequency of vibrator (06), stirring speed of stirrer (04)/>, and method for producing the sameAnd a theoretical blanking amount for a blanking period.
2. A method of using the automatic blanking device of claim 1, wherein: the blanking method comprises the following steps:
Step 1, a controller (08) obtains preset parameters of a precast slab, and divides the blanking process into a plurality of blanking periods And obtaining the control parameters of the motor (9) and a blanking period/>, according to the obtained preset parameter valuesThe control parameters comprise a preset rotating speed range and an operating speed V1 of the motor (9); acquiring performance indexes of gel materials, and acquiring the vibration frequency of a corresponding vibrator (06) and the stirring speed V2 of a stirrer (04);
Step 2, a controller (08) controls the stirrer (04) to stir raw materials to form slurry according to the obtained stirring speed V2 of the stirrer (04), and a discharge valve is opened after stirring is completed to enable the slurry to enter a hopper (03); the controller (08) closes the stirrer (04) and the discharge valve, and vibrates the vibrator (06) according to the vibration frequency of the vibrator (06) so as to increase the fluidity of the slurry;
Step 3, a controller (08) controls a motor (9) to drive an impeller of a rotary blanking valve (01) to rotate according to the acquired control parameters, blanking of a blanking period is completed, meanwhile, the weight change of the blanking device of the blanking period fed back by a loading device (05) is received, namely, the actual blanking amount in the blanking period is processed by the controller (08) through an online sliding filter, the actual blanking amount of the blanking period is acquired, the controller (8) compares the acquired actual blanking amount with the theoretical blanking amount, and the comparison of the actual blanking amount with the theoretical blanking amount means that: if the difference between the actual blanking amount and the theoretical blanking amount is larger than a preset range, the running speed V1 of the motor (9) of the rotary blanking valve (01) is adjusted in a preset rotating speed range until the obtained difference between the actual blanking amount and the theoretical blanking amount is in an allowable range, and the rotating speed of the impeller of the rotary blanking valve (01), namely the running speed V1 of the motor (9), is adjusted according to a comparison result, so that the blanking amount is automatically adjusted;
The implementation steps of the online sliding filter are as follows:
step S0, according to the number of impellers of the rotary blanking valve Effective volume of the mixing cavity/>Determining the sampling period/>, of the weight data collected by the load device; Initialize two queues/>And/>Queue length is/>，/>，/>Is a natural number;
step S1, calculating the blanking amount of a blanking period, which specifically comprises the following steps: the load device collects weight data and queues The weight data in the queue head moves sequentially, and the detected weight data is put into the queue/>Tail of queue, if queue/>The queue head data in the first complete blanking period is not empty, and the blanking quantity/>, of the first complete blanking period is obtained; If queue/>If the queue head data is empty, repeating the step S1;
step S2 of eliminating abnormal values, specifically comprising the following steps: queues The blanking amount of the device is moved to the queue head in sequence, and the acquired blanking amount data/>Put into queue/>Tail of queue, if queue/>The queue head data in (1) is not null, and/>Then use Laider criterion for queue/>In/>Abnormal value rejection is carried out on the blanking amount data, and if blanking amount data are rejected, the steps S1 and S2 are repeated; if queue/>The queue head data in (1) is not null, and/>Queue/>, using a glabros testIn/>Abnormal value rejection is carried out on the blanking amount data; if the blanking amount data is removed, repeating the steps S1 and S2; if queue/>If the queue head data in the queue head is empty, repeating the steps S1 and S2;
step S3 obtaining a queue Average value of the feed amount data/>As the actual blanking amount of the current blanking period.
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| CN112454636B (en) * | 2020-11-25 | 2022-04-19 | 广东博智林机器人有限公司 | Control method and device, material distributor and storage medium |
| CN113985824B (en) * | 2021-10-15 | 2024-06-25 | 内蒙古双欣环保材料股份有限公司 | Automatic timing feeding control device and method |
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