CN113058482A - High-precision powder metering and batching system and metering and batching method - Google Patents
High-precision powder metering and batching system and metering and batching method Download PDFInfo
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- CN113058482A CN113058482A CN202110273090.1A CN202110273090A CN113058482A CN 113058482 A CN113058482 A CN 113058482A CN 202110273090 A CN202110273090 A CN 202110273090A CN 113058482 A CN113058482 A CN 113058482A
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- weighing
- batching
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- metering
- bin
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
- B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/805—Mixing plants; Combinations of mixers for granular material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2117—Weight
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/75—Discharge mechanisms
- B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
- B01F35/7547—Discharge mechanisms characterised by the means for discharging the components from the mixer using valves, gates, orifices or openings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/46—Devices for emptying otherwise than from the top using screw conveyors
Abstract
The invention discloses a high-precision powder metering and batching system, which is connected between a storage bin and a dispersing device, and comprises a buffer bin, wherein the buffer bin is connected below the storage bin, a first weighing device is arranged in the buffer bin, an outlet below the buffer bin is connected with a spiral feeder, the spiral feeder is provided with a second weighing device, an outlet of the spiral feeder is connected with the dispersing device, the high-precision powder metering and batching system also comprises a discharging device arranged at a discharge port of the storage bin, and the discharging device, the spiral feeder, the first weighing device and the second weighing device are connected with a control device; also discloses a high-precision powder metering and batching method; the precision of final measurement can be promoted, the multi-section speed measurement is adopted, the production efficiency is improved, the variable-frequency feeding is realized, and the batching precision is improved.
Description
Technical Field
The invention relates to the technical field of batching, in particular to a high-precision powder metering and batching system and a metering and batching method.
Background
The conventional methods for metering powder mainly include: 1. weighing outside, separately and independently metering, and then manually batching; 2. directly metering by adopting a dynamic load scale in a target container; 3. and (4) weight loss measurement and secondary material transfer.
However, the above conventional powder metering methods have the following disadvantages:
1. external metering and manual batching, wherein the risk of manual missing batching after metering exists; metering data is difficult to keep and cannot be linked with a system; the open type metering system has the material accuracy kept by manpower and has the risk of material error.
2. The dynamic load measurement adopts increment measurement in a target container, and the common target container is large, has more other materials and large base number, and causes large increment measurement error and inaccurate proportioning.
3. The weightlessness measurement and the secondary material transfer easily cause the material to stick to the wall in the secondary material transfer process, and the accurately-measured material cannot completely enter a target container.
Disclosure of Invention
In view of the existing defects, the invention provides a high-precision powder metering and batching system and a metering and batching method, which can improve the precision of final metering, adopt multi-stage speed metering, improve the production efficiency, realize variable-frequency feeding and improve the batching precision.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the utility model provides a high accuracy powder measurement batching system, connects between storage silo and dispersion devices, high accuracy powder measurement batching system includes a surge bin, the surge bin is connected in the storage silo below, be equipped with first weighing device in the surge bin, a surge bin below exit linkage screw feeder, screw feeder is equipped with the second weighing device, the screw feeder export is connected with the dispersion devices, high accuracy powder measurement batching system is still including setting up the unloader at the storage silo discharge gate, unloader, screw feeder, first weighing device and second weighing device are connected with a controlling means.
According to one aspect of the invention, the blanking device comprises an activation hopper, a blanking valve and a blanking driver for controlling the opening and closing of the blanking valve, wherein the blanking driver is connected with the control device.
According to one aspect of the invention, the first weighing device comprises a first weighing sensor, and the first weighing sensor is used for acquiring a newly added weight value of the buffer bin after the powder falls from the storage bin to the buffer bin.
According to one aspect of the invention, the second weighing device comprises a second weighing sensor for acquiring the weight value lost after the powder is sent out to the dispersing device by the screw feeder.
According to one aspect of the invention, the high-precision powder metering and batching system further comprises an alarm device, and the alarm device is connected with the control device.
According to one aspect of the invention, the high-precision powder metering and batching system further comprises a vibration blanking device for promoting the powder to move.
According to one aspect of the present invention, the screw feeder includes a driving motor, a feed screw, and a discharge valve, and an output frequency of the driving motor is set to be high first and then low in one feeding process.
A high-precision powder metering and batching method comprises the following steps:
controlling a valve at the bottom of the storage bin to be opened, and performing gravity blanking to a buffer bin;
performing incremental weighing through a first weighing device in the buffer bin, and controlling a valve at the bottom of the storage bin to be closed when the increased weight reaches a preset value;
controlling a discharge valve of the buffer bin to be opened, controlling a discharge valve of the spiral feeder to be opened, and carrying out weightless weighing through a second weighing device;
controlling the output of the spiral feeder to feed at the output frequency of first high and then low;
and detecting the weighing value of the second weighing device in real time, controlling the spiral feeder to stop feeding when a preset value is reached, and closing a discharge valve of the spiral feeder.
According to one aspect of the invention, the first weighing means adds a predetermined amount of weight 1.1 to 1.3 times the target value of the ingredient.
According to one aspect of the invention, the controlling the output of the screw feeder to feed with the output frequency of the first high and the second low is specifically as follows: and initially controlling the screw feeder to feed at a higher output frequency, and reducing the frequency and controlling the screw feeder to feed at a lower output frequency when the weighing value of the second weighing device reaches a preset advance.
The implementation of the invention has the advantages that: the method comprises the following steps that a middle buffer bin is adopted in a set of system for first metering, then a spiral feeder is adopted for second metering, and accurate batching is finally achieved; an increment metering mode is adopted during the first metering, a preset value of the metering is set, the preset value is 1.1-1.3 times of a material mixing target value, the precision of weightlessness metering is facilitated, and the advance is preset to control the advanced closing of a valve at the bottom of a storage bin, so that the final blanking is 1.1-1.3 times of the material mixing target value; furthermore, the material is proportioned in a screw mode for the second metering, the discharging precision is improved, and the feeding amount of each screw blade is an inherent error of the system and is generally far smaller than the material proportioning error; meanwhile, feeding at a fast speed and a slow speed, setting a high frequency to start a feeding screw rod, and delivering the materials to a target container; when the weight loss reaches the preset advance, reducing the frequency, and outputting the screw by adopting low frequency; when the weight loss reaches the preset closing advance, closing the screw discharge valve, closing the motor and closing the buffer bin discharge valve; the system can set up the automatic blending process, accomplishes orderly automatic blending of whole batching process, realizes full automatic production.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a high-precision powder metering and batching system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, a high accuracy powder measurement and proportioning system connects between storage silo 1 and dispersion devices 2, high accuracy powder measurement and proportioning system includes a surge bin 3, the surge bin is connected in the storage silo below, be equipped with first weighing device 31 in the surge bin, a surge bin below exit linkage spiral feeder 4, spiral feeder is equipped with second weighing device 41, spiral feeder export is connected with dispersion devices, high accuracy powder measurement and proportioning system is still including setting up unloader 11 at the storage silo discharge gate, unloader 11, spiral feeder 4, first weighing device 31 and second weighing device 41 are connected with a controlling means.
In practical application, the blanking device 11 includes an activation hopper 111, a blanking valve 112, and a blanking driver 113 for controlling the opening and closing of the blanking valve, and the blanking driver is connected to the control device.
In practical application, first weighing device includes a weighing sensor for acquire the newly-increased weight value of buffer bin behind the powder drops to buffer bin by the storage silo.
In practical application, the second weighing device comprises a second weighing sensor and is used for acquiring a weight value lost after the powder is sent out to the dispersing device by the spiral feeder.
In practical application, the high-precision powder metering and batching system further comprises an alarm device 5, and the alarm device is connected with the control device.
In practical application, the high-precision powder metering and batching system further comprises a vibration blanking device 6 for urging the powder to move. The vibration blanking device 6 comprises an air hammer 61, an electromagnetic valve 62 and a pressure reducing valve 63, wherein the air hammer is connected to the position where the powder is required to be driven to fall, the air hammer is connected with the pressure reducing valve through the electromagnetic valve, the pressure reducing valve is connected with an air source, and the electromagnetic valve is connected with a control device. The vibration blanking devices are arranged on the storage bin, the pipeline connecting the storage bin with the buffer bin, the pipeline connecting the buffer bin with the spiral feeder and the pipeline connecting the spiral feeder with the dispersing device respectively.
In practical applications, the screw feeder 4 includes a driving motor 42, a feeding screw 43 and a discharging valve 44, and the output frequency of the driving motor is set to be high first and then low second in one feeding process.
Example two
A high-precision powder metering and batching method comprises the following steps:
step S1: controlling a valve at the bottom of the storage bin to be opened, and performing gravity blanking to a buffer bin;
firstly, placing powder materials in a powder raw material bin, namely a storage bin, at the upper part, and urging the powder to be uniform through a vibration discharging device; then setting an initial state, and resetting a metering system;
the host system, namely the control device, sends an instruction, and the PLC controls the valve at the bottom of the raw material bin to be opened to perform gravity blanking to the middle buffer bin. In the process, the powder in the connecting pipeline is urged to fall down by vibrating the blanking device, so that the wall adhesion is prevented.
Step S2: performing incremental weighing through a first weighing device in the buffer bin, and controlling a valve at the bottom of the storage bin to be closed when the increased weight reaches a preset value;
the system monitors the first weighing device in real time in an incremental metering mode and a blanking process, and can calculate the real blanking amount according to the lead; the system can be controlled by a PLC to close the blanking valve in time to carry out first metering in the blanking process, and the error cannot be overlarge.
In practical application, due to the shaking of the environment system in the blanking process, the standing time can be set, and the data capture accuracy between the PLC and the weighing instrument is ensured.
The weighing and metering value of the first weighing device of the grabbing buffering bin is compared with the batching target value, and when the weighing value is 1.1 times larger than the target value and is smaller than 1.3 times of the target value, the precise batching process is started.
Step S3: controlling a discharge valve of the buffer bin to be opened, controlling a discharge valve of the spiral feeder to be opened, and carrying out weightless weighing through a second weighing device;
the weightlessness measuring mode is adopted at this time, the PLC opens the discharge valve of the buffer bin and the discharge valve of the spiral feeder, and the second weighing device is started to carry out weightlessness measurement.
Step S4: controlling the output of the spiral feeder to feed at the output frequency of first high and then low;
firstly, setting a high frequency to start a spiral feeder, and delivering materials to a target container; and when the weight loss reaches the preset advance, reducing the frequency, and outputting the screw by adopting low frequency. In this embodiment, 50Hz is set to start the screw feeder and deliver the material to the dispersing device; and when the weight loss reaches the preset lead, reducing the frequency, and outputting the screw by adopting 20 Hz.
Step S5: and detecting the weighing value of the second weighing device in real time, controlling the spiral feeder to stop feeding when a preset value is reached, and closing a discharge valve of the spiral feeder.
When the weight loss amount reaches the preset closing advance amount in the step S4, the discharge valve of the screw feeder is closed, and the discharge valve of the buffer bin is closed.
In the whole process, the vibration feeder is adopted to urge feeding, so that the powder is prevented from sticking to the wall.
After the preset standing time, the weighing value of the buffer bin is read and compared with the initially set batching target quantity. When the error is in the controllable range, the burdening is finished; otherwise, other emergency plans such as alarm and the like are started.
The deviation between the ingredient amount and the target amount of the first weighing is not suitable to be overlarge, and is generally 1.1-1.3 times, so that the accuracy of weightless metering is facilitated.
The second weighing is carried out in a fast and slow mode, so that the production and batching process can be accelerated.
Adopt the screw rod mode batching, improve ejection of compact precision, the blade pay-off volume of every screw rod is systematic inherent error, is generally less than the batching error far away.
The implementation of the invention has the advantages that: the method comprises the following steps that a middle buffer bin is adopted in a set of system for first metering, then a spiral feeder is adopted for second metering, and accurate batching is finally achieved; an increment metering mode is adopted during the first metering, a preset value of the metering is set, the preset value is 1.1-1.3 times of a material mixing target value, the precision of weightlessness metering is facilitated, and the advance is preset to control the advanced closing of a valve at the bottom of a storage bin, so that the final blanking is 1.1-1.3 times of the material mixing target value; furthermore, the material is proportioned in a screw mode for the second metering, the discharging precision is improved, and the feeding amount of each screw blade is an inherent error of the system and is generally far smaller than the material proportioning error; meanwhile, feeding at a fast speed and a slow speed, setting a high frequency to start a feeding screw rod, and delivering the materials to a target container; when the weight loss reaches the preset advance, reducing the frequency, and outputting the screw by adopting low frequency; when the weight loss reaches the preset closing advance, closing the screw discharge valve, closing the motor and closing the buffer bin discharge valve; the system can set up the automatic blending process, accomplishes orderly automatic blending of whole batching process, realizes full automatic production.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The utility model provides a high accuracy powder measurement and proportioning system, connects between storage silo and dispersion devices, a serial communication port, high accuracy powder measurement and proportioning system includes a surge bin, the surge bin is connected in the storage silo below, be equipped with first weighing device in the surge bin, a surge bin below exit linkage screw feeder, screw feeder is equipped with the second weighing device, the screw feeder export is connected with the dispersion devices, high accuracy powder measurement and proportioning system is still including setting up the unloader at the storage silo discharge gate, unloader, screw feeder, first weighing device and second weighing device are connected with a controlling means.
2. The high-precision powder metering and batching system of claim 1, wherein the blanking device comprises an activation hopper, a blanking valve and a blanking driver for controlling the opening and closing of the blanking valve, and the blanking driver is connected with the control device.
3. The high-precision powder metering and proportioning system of claim 1, wherein the first weighing device comprises a first weighing sensor for obtaining a newly added weight value of the buffer bin after the powder falls from the storage bin to the buffer bin.
4. The high-precision powder metering and batching system of claim 1, wherein the second weighing device comprises a second weighing sensor for obtaining the weight value lost after the powder is sent out to the dispersing device by the screw feeder.
5. The high-precision powder metering and batching system according to claim 1, further comprising an alarm device, wherein the alarm device is connected with the control device.
6. The high-precision powder metering and batching system according to claim 1, further comprising a vibrating blanking device for urging powder to move.
7. The high-precision powder metering and batching system of any one of claims 1 to 6, wherein the screw feeder comprises a driving motor, a feeding screw and a discharging valve, and the output frequency of the driving motor is set to be high first and low second in one feeding process.
8. A high-precision powder metering and batching method is characterized by comprising the following steps:
controlling a valve at the bottom of the storage bin to be opened, and performing gravity blanking to a buffer bin;
performing incremental weighing through a first weighing device in the buffer bin, and controlling a valve at the bottom of the storage bin to be closed when the increased weight reaches a preset value;
controlling a discharge valve of the buffer bin to be opened, controlling a discharge valve of the spiral feeder to be opened, and carrying out weightless weighing through a second weighing device;
controlling the output of the spiral feeder to feed at the output frequency of first high and then low;
and detecting the weighing value of the second weighing device in real time, controlling the spiral feeder to stop feeding when a preset value is reached, and closing a discharge valve of the spiral feeder.
9. The high-precision powder metering and batching method according to claim 8, wherein the weight added by the first weighing device reaches a preset value which is 1.1-1.3 times of the batching target value.
10. The high-precision powder metering and batching method according to claim 8, wherein the feeding by controlling the output of the screw feeder with the output frequency of first high and then low is specifically: and initially controlling the screw feeder to feed at a higher output frequency, and reducing the frequency and controlling the screw feeder to feed at a lower output frequency when the weighing value of the second weighing device reaches a preset advance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110273090.1A CN113058482A (en) | 2021-03-14 | 2021-03-14 | High-precision powder metering and batching system and metering and batching method |
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| CN202110273090.1A CN113058482A (en) | 2021-03-14 | 2021-03-14 | High-precision powder metering and batching system and metering and batching method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307721A (en) * | 2022-01-20 | 2022-04-12 | 广东邦普循环科技有限公司 | Lithium salt metering and batching system and batching method |
| CN114534565A (en) * | 2022-03-21 | 2022-05-27 | 江苏神力特生物科技股份有限公司 | Attapulgite-based high polymer material feed preparation device and method |
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2021
- 2021-03-14 CN CN202110273090.1A patent/CN113058482A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307721A (en) * | 2022-01-20 | 2022-04-12 | 广东邦普循环科技有限公司 | Lithium salt metering and batching system and batching method |
| WO2023138255A1 (en) * | 2022-01-20 | 2023-07-27 | 广东邦普循环科技有限公司 | Lithium salt metering and batching system, and batching method |
| CN114534565A (en) * | 2022-03-21 | 2022-05-27 | 江苏神力特生物科技股份有限公司 | Attapulgite-based high polymer material feed preparation device and method |
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