CN112971192A - PID control charging system and using method - Google Patents
PID control charging system and using method Download PDFInfo
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- CN112971192A CN112971192A CN202110253668.7A CN202110253668A CN112971192A CN 112971192 A CN112971192 A CN 112971192A CN 202110253668 A CN202110253668 A CN 202110253668A CN 112971192 A CN112971192 A CN 112971192A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 241000208125 Nicotiana Species 0.000 claims abstract description 24
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims description 156
- 239000000463 material Substances 0.000 claims description 67
- 238000004140 cleaning Methods 0.000 claims description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000010865 sewage Substances 0.000 claims description 24
- 238000005070 sampling Methods 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000010009 beating Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims 3
- 230000008569 process Effects 0.000 abstract description 14
- 238000012545 processing Methods 0.000 abstract description 2
- 238000000889 atomisation Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/12—Steaming, curing, or flavouring tobacco
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/0093—Devices for cleaning the internal surfaces of the container and forming part of the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/02—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/08—Arrangements of devices for controlling, indicating, metering or registering quantity or price of liquid transferred
- B67D7/16—Arrangements of liquid meters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/78—Arrangements of storage tanks, reservoirs or pipe-lines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention provides a PID control feeding system and a using method thereof, and relates to the technical field of tobacco processing. The invention has convenient use and complete feeding system, ensures the high quality requirement of the silk making and feeding process, and can meet the requirements of stably controlling the feeding flow and the precision by pre-filling.
Description
Technical Field
The invention relates to the technical field of tobacco processing, in particular to a PID control feeding system and a using method thereof.
Background
The PID control is widely used in the prior tobacco shred feeding process, and has the advantages of simple principle, easy realization, wide practical range, mutually independent control parameters and the like.
For example, chinese patent invention CN109901384A provides a method and a system for controlling tobacco shred feeding accuracy, comprising: s1, respectively inputting the feeding precision error parameter and the feeding precision error change rate parameter in the tobacco shred feeding process into a preset fuzzy controller, and outputting the proportional coefficient of a PID controller by the preset fuzzy controller; and S2, constructing a PID controller based on the proportional coefficient to control the feeding precision in the tobacco shred making feeding process. The feeding precision control method and the feeding precision control system for tobacco leaf shred production provided by the invention adopt a method of combining a PID controller and fuzzy control to control the feeding precision error, and dynamically adjust the proportional value Kp of the PID controller through the fuzzy control, so that different feeding addition speeds are provided for different feeding precision errors, and the feeding precision error is further reasonably improved, and the feeding amount in the tobacco leaf shred production process meets the requirement
However, the above charging method still has the following disadvantages: 1. although the PID control parameters can be adjusted according to the flow and the accuracy of the tobacco leaves processed by the feeding equipment, the feeding accuracy of the feeding equipment and the measurement accuracy to obtain stable feeding flow control, an oscillation period exists when PID control feeding is started, and although the length of the oscillation period can be adjusted by adjusting the parameters, the fluctuation of the stable control period can be influenced, the feeding flow and the accuracy can be influenced, and the product quality can be directly influenced; 2. PID control feeding is carried out in a conventional pipeline, a complete feeding system is not provided, and the high quality requirement of a silk making feeding process cannot be ensured.
Therefore, in order to solve the above problems, it is necessary to design a reasonable PID control charging system.
Disclosure of Invention
The invention aims to provide a PID control feeding system which is convenient to use, has a complete feeding system, can execute an integral feeding-recovering-cleaning process to achieve the aim of ensuring the high quality requirement of a silk-making feeding process, can effectively avoid an oscillator during feeding by pre-filling with pipeline feedback before feeding, and meets the requirement of stably controlling the feeding flow and the precision.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a PID control feeding system comprises a material tank, a filter communicated with the material tank through a first material liquid pipeline, a feeding pump communicated with the filter through a second material liquid pipeline, a flowmeter communicated with the feeding pump through a third material liquid pipeline, a first three-way control valve communicated with the flowmeter through a fourth material liquid pipeline and a second three-way control valve communicated with a first three-way control valve through a first material liquid return pipeline, wherein the second three-way control valve is communicated with the material tank through a second material liquid return pipeline, the first three-way control valve is communicated with a double-medium feeding nozzle through a fifth material liquid pipeline, the material tank is connected with a material tank overflow pipeline, a material tank sewage discharge pipeline, a material liquid recovery pipeline, a material liquid conveying pipeline and a material tank cleaning water pipeline, and a cleaning nozzle is arranged at the joint of the material tank and the material tank cleaning water pipeline, the second three-way control valve is connected to a drain outlet through a feed liquid sewage discharge pipeline, the material tank overflow pipeline is far away from one end of the material tank and the material tank sewage discharge pipeline, and one end of the material tank is connected to the drain outlet.
Preferably, the first feed liquid pipeline is provided with a first control valve close to the charging bucket and a first manual valve close to the filter, the first feed liquid pipeline is communicated with a cleaning water pipeline and a compressed air pipeline, and the cleaning water pipeline and the compressed air pipeline are communicated between the first control valve and the first manual valve.
Preferably, a second manual valve is arranged between the filter and the feeding pump.
Preferably, the fourth feed liquid pipeline is communicated with a feed liquid sampling pipeline, the fourth feed liquid pipeline is provided with a third manual valve, the feed liquid sampling pipeline is provided with a fourth manual valve, and the feed liquid sampling pipeline is communicated to one side, close to the flowmeter, of the third manual valve.
Preferably, the dual-medium feeding nozzle is communicated with an atomizing steam pipeline.
Preferably, the feed liquid conveying pipeline is provided with a second control valve, the charging bucket cleaning water pipeline is provided with a third control valve, the cleaning water pipeline is provided with a fourth control valve, the compressed air pipeline is provided with a fifth control valve, the charging bucket draining pipeline is provided with a sixth control valve, and the charging bucket feed liquid recycling pipeline is provided with a seventh control valve. The first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve and the seventh control valve are all pneumatic or electromagnetic control valves, and are provided with opening and closing position detection.
Preferably, the feeding pump is a gear pump, and the flow meter is an anti-blocking type flow meter.
Preferably, an opening A of the first three-way control valve is communicated with the fourth feed liquid pipeline, an opening B of the first three-way control valve is communicated with the fifth feed liquid pipeline, an opening C of the first three-way control valve is communicated with the first feed liquid return pipeline, and the first three-way control valve has two flowing states of A-B and A-C; the A port of the second three-way control valve is communicated with the first material liquid return pipeline, the B port of the second three-way control valve is communicated with the second material liquid return pipeline, the C port of the second three-way control valve is communicated with the material liquid sewage discharge pipeline, and the second three-way control valve has two flowing states of A-B and A-C. And the first three-way control valve and the second three-way control valve are both pneumatic or electromagnetic control valves.
Of course, the invention also comprises a PLC controller, and the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve, the seventh control valve, the charging pump, the flow meter, the first three-way control valve and the second three-way control valve are all electrically connected with the PLC controller.
The invention also provides a use method of the PID control charging system, which comprises the following steps:
s1: dispensing the formula; setting feeding parameters, wherein the feeding parameters comprise tobacco flow and feeding ratio;
s2: material liquid is required; opening a second control valve, and loading the feed liquid required by production into the charging bucket through a feed liquid conveying pipeline;
s3: pre-filling feed liquid; starting the feed pump to enable the feed liquid in the feed tank to return to the feed tank through the feed pump, the flowmeter, the first three-way control valve (the port A flows to the port C) and the second three-way control valve (the port A flows to the port B);
s4: starting feeding; the feed liquid is mixed with the atomized steam in the atomized steam pipeline through the conversion of a first three-way control valve (from the opening A to the opening B), and the mixture is sprayed and fed through a double-medium feeding nozzle;
s5: PID control feeding; performing PID control on feeding according to the real-time flow of the tobacco leaves, the feeding parameters, the rotating speed of a feeding pump and the reading of a flowmeter;
s6: finishing the feeding; after the flow of the tobacco leaves is zero, switching a first three-way control valve (from the port A to the port C) and closing the feeding pump;
s7: recovering the feed liquid; opening the fifth control valve, and blowing the feed liquid in the pipeline back to the feed tank by using compressed air through the charging pump, the flowmeter, the first three-way control valve (the port A flows to the port C) and the second three-way control valve (the port A flows to the port B); then opening a seventh control valve to recover the feed liquid in the charging bucket;
s8: cleaning a pipeline charging bucket; opening a fourth control valve, using clean water to sequentially pass through a charging pump, a flowmeter, a first three-way control valve (an opening A flows to an opening C) and a second three-way control valve (an opening A flows to an opening C), cleaning a pipeline, and beating the cleaning water to treat a sewage outlet; then opening a fifth control valve, and blowing clean cleaning water in the pipeline by using compressed air through a charging pump, a flow meter, a first three-way control valve (an opening A flows to an opening C) and a second three-way control valve (an opening A flows to an opening C); and opening the third control valve to clean the charging bucket through the cleaning nozzle by using cleaning water, and then opening the sixth control valve to discharge the cleaning water in the charging bucket to a sewage discharge outlet.
As a preference of the present invention, in performing step S3, the feed liquid pre-filling comprises two stages; the first stage is open-loop control, a charging pump is started for pre-filling, and the rotating speed of the charging pump is controlled to be 60-80% of the rated rotating speed so as to realize that the feed liquid is quickly filled in a pipeline; and the second stage is closed-loop control, and the feed liquid is automatically controlled to be pre-filled by PID by controlling the rotating speed of a feeding pump according to the flow rate and the feeding ratio of the tobacco leaves as input signals of PID control.
The PID control charging system and the using method have the advantages that: the feeding device is convenient to use, has a complete feeding system, can execute the integral feeding-recovery-cleaning process to achieve the aim of ensuring the high quality requirement of the silk-making feeding process, can also be pre-filled through feedback with a pipeline before feeding, effectively avoids an oscillator during feeding, and meets the requirements of stably controlling the feeding flow and precision.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a PID control charging system according to the invention;
FIG. 2 is a schematic view of the feed liquid flow direction during pre-fill of the feed liquid of a PID controlled feed system according to the invention;
FIG. 3 is a schematic view of the feed liquid flow direction during feed liquid recovery of a PID controlled feed system according to the invention;
FIG. 4 is a schematic diagram of the flow direction of the fluid during the cleaning of the pipeline bucket of the PID control charging system;
FIG. 5 is a schematic view of the feed flow trend of a PID controlled feed system of the invention;
FIG. 6 is a schematic flow diagram of a method of using a PID controlled charging system according to the invention;
in the figure: 1. a charging bucket, 1-1, a charging bucket overflow pipeline, 1-2, a charging bucket sewage discharge pipeline, 1-3, a charging bucket liquid recovery pipeline, 1-4, a first liquid pipeline, 1-5, a liquid conveying pipeline, 1-6, a charging bucket cleaning water pipeline, 2, a first control valve, 3, a first manual valve, 4, a filter, 4-1, a cleaning water pipeline, 4-2, a compressed air pipeline, 4-6, a second liquid pipeline, 5, a second manual valve, 6, a charging pump, 6-7, a third liquid pipeline, 7, a flow meter, 7-1, a liquid sampling pipeline, 7-10, a fourth liquid pipeline, 8, a third manual valve, 9, a fourth manual valve, 10, a first three-way control valve, 10-12, a fifth liquid pipeline, 11, an atomization steam pipeline, 12 and a double-medium charging nozzle, 10-13 parts of a first feed liquid return pipeline, 13 parts of a second three-way control valve, 13-1 parts of a second feed liquid return pipeline, 13-2 parts of a feed liquid drain pipeline, 14 parts of a second control valve, 15 parts of a third control valve, 16 parts of a cleaning touch nozzle, 17 parts of a fourth control valve, 18 parts of a fifth control valve, 19 parts of a sixth control valve, 20 parts of a seventh control valve.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the modules and steps set forth in these embodiments and steps do not limit the scope of the invention unless specifically stated otherwise.
Meanwhile, it should be understood that the flows in the drawings are not merely performed individually for convenience of description, but a plurality of steps are performed alternately with each other.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and systems known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
The first embodiment is as follows: as shown in fig. 1 to 5, which are only one embodiment of the present invention, a PID-controlled charging system includes a charging bucket 1, a filter 4 communicating with the charging bucket 1 through a first feed liquid pipeline 1-4, a charging pump 6 communicating with the filter 4 through a second feed liquid pipeline 4-6, a flow meter 7 communicating with the charging pump 6 through a third feed liquid pipeline 6-7, a first three-way control valve 10 communicating with the flow meter 7 through a fourth feed liquid pipeline 7-10, and a second three-way control valve 13 communicating with the first three-way control valve 10 through a first feed liquid return pipeline 10-13, the second three-way control valve 13 communicating with the charging bucket 1 through a second feed liquid return pipeline 13-1, the first three-way control valve 10 communicating with a dual-medium charging nozzle 12 through a fifth feed liquid pipeline 10-12, the material tank 1 is connected with a material tank overflow pipeline 1-1, a material tank sewage discharge pipeline 1-2, a material tank material liquid recovery pipeline 1-3, a material liquid conveying pipeline 1-5 and a material tank cleaning water pipeline 1-6, a cleaning nozzle 16 is arranged at the joint of the material tank 1 and the material tank cleaning water pipeline 1-6, a second three-way control valve 13 is connected to a sewage discharge port through the material liquid sewage discharge pipeline 13-2, the material tank overflow pipeline 1-1 is far away from one end of the material tank 1 and the material tank sewage discharge pipeline 1-2, and one end of the material tank 1 is connected to the sewage discharge port.
In the present invention, the largest loop is: the feed liquid in the charging bucket 1 can flow to the filter 4 through the first feed liquid pipeline 1-4; then flows to a charging pump 6 through a second feed liquid pipeline 4-6; then flows to a flow meter 7 through a third feed liquid pipeline 6-7; then flows to a first three-way control valve 10 through a fourth feed liquid pipeline 7-10; finally flows through the second three-way control valve 13 through the first feed liquid return pipeline 10-13 and returns to the charging bucket 1 through the second feed liquid return pipeline 13-1. The charging bucket 1 is communicated with a feed liquid conveying pipeline 1-5 for supplying materials into the charging bucket 1, a charging bucket cleaning water pipeline 1-6 for filling cleaning water into the charging bucket 1, a charging bucket sewage discharge pipeline 1-2 for discharging sewage in the charging bucket 1 and a charging bucket feed liquid recovery pipeline 1-3 for recovering the feed liquid in the charging bucket 1 during feed liquid recovery, wherein the charging bucket overflow pipeline 1-1 is arranged above the charging bucket 1, and once the feed liquid in the charging bucket 1 is excessive (generally, the feed liquid exceeds 90% of the total capacity of the charging bucket 1), the feed liquid overflows through the charging bucket overflow pipeline 1-1.
Here, the port a of the first three-way control valve 10 is communicated with the fourth feed liquid pipeline 7-10, the port B of the first three-way control valve 10 is communicated with the fifth feed liquid pipeline 10-12, the port C of the first three-way control valve 10 is communicated with the first feed liquid return pipeline 10-13, and the first three-way control valve 10 has two flow states of a-B and a-C; the port A of the second three-way control valve 13 is communicated with the first material liquid return pipeline 10-13, the port B of the second three-way control valve 13 is communicated with the second material liquid return pipeline 13-1, the port C of the second three-way control valve 13 is communicated with the material liquid sewage discharge pipeline 13-2, and the second three-way control valve 13 has two flowing states of A-B and A-C. The first three-way control valve 10 and the second three-way control valve 13 are both pneumatic or electromagnetic control valves.
When the first three-way control valve 10 is an A-C passage and the second three-way control valve 13 is an A-B passage, the loop is connected, and the feed liquid flows out of the charging bucket 1 and returns to the charging bucket 1 through the filter 4, the feed pump 6, the flowmeter 7, the first three-way control valve 10 and the second three-way control valve 13 in sequence.
If the first three-way control valve 10 is switched to the A-B passage, the feed liquid flows out of the charging bucket 1 and is sprayed out through the filter 4, the feeding pump 6, the flowmeter 7, the first three-way control valve 10 and the double-medium feeding nozzle 12 in sequence;
and if the first three-way control valve 10 is the A-B passage but the second three-way control valve 13 is switched to the A-C passage, the fluid does not return to the charging bucket 1 but flows out to the sewage draining outlet.
And a first control valve 2 close to the charging bucket 1 and a first manual valve 3 close to the filter 4 are arranged on the first feed liquid pipeline 1-4, the first feed liquid pipeline 1-4 is communicated with a cleaning water pipeline 4-1 and a compressed air pipeline 4-2, the cleaning water pipeline 4-1 and the compressed air pipeline 4-2 are communicated between the first control valve 2 and the first manual valve 3, and when the first control valve 2 is closed, fluid in the cleaning water pipeline 4-1 or the compressed air pipeline 4-2 can pass through the filter 4, the charging pump 6 and the flow meter 7 to the first three-way control valve 10 and the second three-way control valve 13.
Moreover, a second control valve 14 is arranged on the feed liquid conveying pipeline 1-5, a third control valve 15 is arranged on the charging bucket cleaning water pipeline 1-6, a fourth control valve 17 is arranged on the cleaning water pipeline 4-1, a fifth control valve 18 is arranged on the compressed air pipeline 4-2, a sixth control valve 19 is arranged on the charging bucket sewage discharge pipeline 1-2, and a seventh control valve 20 is arranged on the charging bucket feed liquid recovery pipeline 1-3. Here, the first control valve 2, the second control valve 14, the third control valve 15, the fourth control valve 17, the fifth control valve 18, the sixth control valve 19, and the seventh control valve 20 are all pneumatic or electromagnetic control valves, and are provided with open and closed position detection.
Of course, the invention also comprises a PLC controller, and the first control valve 2, the second control valve 14, the third control valve 15, the fourth control valve 17, the fifth control valve 18, the sixth control valve 19, the seventh control valve 20, the charging pump 6, the flowmeter 7, the first three-way control valve 10 and the second three-way control valve 13 are all electrically connected with the PLC controller. Before feeding, feeding parameters of feeding control need to be sent to a PLC (programmable logic controller), and then the controller controls the whole system, wherein the feeding parameters comprise tobacco flow and feeding ratio.
Here, the first control valve 2, the second control valve 14, the third control valve 15, the fourth control valve 17, the fifth control valve 18, the sixth control valve 19, and the seventh control valve 20 are provided with open and closed position detection, and the open and closed positions of these control valves may be fed back to the PLC controller. Similarly, the first three-way control valve 10 and the second three-way control valve 13 are provided with corresponding position detection, so that the opening positions (A-B or A-C) of the three-way control valves can be fed back to the PLC, and the readings of the feeding pump 6 and the flowmeter 7 can be fed back to the PLC; after acquiring the signals, the PLC controller can control all the control valves and the three-way control valve to open and close.
The specific charging operation is as follows:
firstly, the material liquid is required; opening a second control valve, and loading the feed liquid required by production into the charging bucket through a feed liquid conveying pipeline;
then, pre-filling the feed liquid; starting the feed pump to enable the feed liquid in the feed tank to return to the feed tank through the feed pump, the flowmeter, the first three-way control valve (the port A flows to the port C) and the second three-way control valve (the port A flows to the port B);
then feeding and starting; the feed liquid is mixed with the atomized steam in the atomized steam pipeline through the conversion of a first three-way control valve (from the opening A to the opening B), and the mixture is sprayed and fed through a double-medium feeding nozzle;
then PID control feeding is carried out; performing PID control on feeding according to the real-time flow of the tobacco leaves, the feeding parameters, the rotating speed of a feeding pump and the reading of a flowmeter;
finally, finishing the feeding; after the flow of the tobacco leaves is zero, switching a first three-way control valve (from the port A to the port C) and closing the feeding pump;
and also to carry out feed liquid recovery; opening the fifth control valve, and blowing the feed liquid in the pipeline back to the feed tank by using compressed air through the charging pump, the flowmeter, the first three-way control valve (the port A flows to the port C) and the second three-way control valve (the port A flows to the port B); then opening a seventh control valve to recover the feed liquid in the charging bucket;
in addition, cleaning a pipeline charging bucket; opening a fourth control valve, using clean water to sequentially pass through a charging pump, a flowmeter, a first three-way control valve (an opening A flows to an opening C) and a second three-way control valve (an opening A flows to an opening C), cleaning a pipeline, and beating the cleaning water to treat a sewage outlet; then opening a fifth control valve, and blowing clean cleaning water in the pipeline by using compressed air through a charging pump, a flow meter, a first three-way control valve (an opening A flows to an opening C) and a second three-way control valve (an opening A flows to an opening C); and opening the third control valve to clean the charging bucket through the cleaning nozzle by using cleaning water, and then opening the sixth control valve to discharge the cleaning water in the charging bucket to a sewage discharge outlet.
The PID control feeding system is convenient to use, has a complete feeding system, can execute the integral feeding-recovery-cleaning process to achieve the aim of ensuring the high quality requirement of the silk-making feeding process, can also be pre-filled by feeding back with a pipeline before feeding, effectively avoids an oscillator during feeding, and meets the requirements of stably controlling the feeding flow and the precision.
Embodiment two, still as shown in fig. 1 to 5, is only one embodiment of the present invention, and on the basis of embodiment one, in a PID-controlled charging system of the present invention, a second manual valve 5 is provided between the filter 4 and the charging pump 6.
In addition, a material liquid sampling pipeline 7-1 is communicated with the fourth material liquid pipeline 7-10, a third manual valve 8 is arranged on the fourth material liquid pipeline 7-10, a fourth manual valve 9 is arranged on the material liquid sampling pipeline 7-1, and the material liquid sampling pipeline 7-1 is communicated to one side, close to the flowmeter 7, of the third manual valve 8.
All the manual valves are manually opened to block liquid flow in the pipeline, and are closed to protect the pipeline when the pipeline is abnormal.
Moreover, charge pump 6 is the gear pump, just the maximum flow of charge pump 6 needs to satisfy the technology demand, flowmeter 7 is anti-blocking type flowmeter, can the accurate measurement take the graininess feed liquid flow of insolubility.
And finally, the double-medium charging nozzle 12 is communicated with an atomization steam pipeline 11, and when the feed liquid flows out of the charging bucket 1 and is sprayed out through the filter 4, the charging pump 6, the flowmeter 7, the first three-way control valve 10 and the double-medium charging nozzle 12 in sequence, the feed liquid is mixed with the atomization steam in the atomization steam pipeline 11 at the position of the double-medium charging nozzle 12 to be sprayed out.
In a third embodiment, as shown in fig. 6, the present invention further provides a method for using a PID-controlled charging system in all the above embodiments, comprising the following steps:
s1: dispensing the formula; setting feeding parameters, wherein the feeding parameters comprise tobacco flow and feeding ratio;
s2: material liquid is required; opening a second control valve, and loading the feed liquid required by production into the charging bucket through a feed liquid conveying pipeline;
s3: pre-filling feed liquid; starting the feed pump to enable the feed liquid in the feed tank to return to the feed tank through the feed pump, the flowmeter, the first three-way control valve (the port A flows to the port C) and the second three-way control valve (the port A flows to the port B);
s4: starting feeding; the feed liquid is mixed with the atomized steam in the atomized steam pipeline through the conversion of a first three-way control valve (from the opening A to the opening B), and the mixture is sprayed and fed through a double-medium feeding nozzle;
s5: PID control feeding; performing PID control on feeding according to the real-time flow of the tobacco leaves, the feeding parameters, the rotating speed of a feeding pump and the reading of a flowmeter;
s6: finishing the feeding; after the flow of the tobacco leaves is zero, switching a first three-way control valve (from the port A to the port C) and closing the feeding pump;
s7: recovering the feed liquid; opening the fifth control valve, and blowing the feed liquid in the pipeline back to the feed tank by using compressed air through the charging pump, the flowmeter, the first three-way control valve (the port A flows to the port C) and the second three-way control valve (the port A flows to the port B); then opening a seventh control valve to recover the feed liquid in the charging bucket;
s8: cleaning a pipeline charging bucket; opening a fourth control valve, using clean water to sequentially pass through a charging pump, a flowmeter, a first three-way control valve (an opening A flows to an opening C) and a second three-way control valve (an opening A flows to an opening C), cleaning a pipeline, and beating the cleaning water to treat a sewage outlet; then opening a fifth control valve, and blowing clean cleaning water in the pipeline by using compressed air through a charging pump, a flow meter, a first three-way control valve (an opening A flows to an opening C) and a second three-way control valve (an opening A flows to an opening C); and opening the third control valve to clean the charging bucket through the cleaning nozzle by using cleaning water, and then opening the sixth control valve to discharge the cleaning water in the charging bucket to a sewage discharge outlet.
Also, in performing step S3, the feed liquid pre-filling includes two stages; the first stage is open-loop control, a charging pump is started for pre-filling, and the rotating speed of the charging pump is controlled to be 60-80% of the rated rotating speed so as to realize that the feed liquid is quickly filled in a pipeline; and the second stage is closed-loop control, and the feed liquid is automatically controlled to be pre-filled by PID by controlling the rotating speed of a feeding pump according to the flow rate and the feeding ratio of the tobacco leaves as input signals of PID control.
The PID control feeding system and the use method are convenient to use, have a complete feeding system, can execute the integral feeding-recovery-cleaning process to achieve the aim of ensuring the high quality requirement of the silk-making feeding process, can also pre-fill the silk-making feeding process through feedback with a pipeline before feeding, effectively avoid an oscillator during feeding, and meet the requirements of stably controlling the feeding flow and precision.
The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A PID control charging system is characterized in that: comprises a charging bucket (1), a filter (4) communicated with the charging bucket (1) through a first liquid-liquid pipeline (1-4), a charging pump (6) communicated with the filter (4) through a second liquid-liquid pipeline (4-6), a flow meter (7) communicated with the charging pump (6) through a third liquid-liquid pipeline (6-7), a first three-way control valve (10) communicated with the flow meter (7) through a fourth liquid-liquid pipeline (7-10), and a second three-way control valve (13) communicated with the first three-way control valve (10) through a first liquid-liquid return pipeline (10-13), wherein the second three-way control valve (13) is communicated with the charging bucket (1) through a second liquid-liquid return pipeline (13-1), the first three-way control valve (10) is communicated with a double-medium charging nozzle (12) through a fifth liquid pipeline (10-12), the material jar (1) is connected with material jar overflow pipeline (1-1), material jar blowdown pipeline (1-2), material jar feed liquid recovery pipeline (1-3), feed liquid conveying pipeline (1-5) and material jar washing water pipeline (1-6), material jar (1) with the junction of material jar washing water pipeline (1-6) is provided with washing nozzle (16), second three way control valve (13) are connected to the drain through feed liquid blowdown pipeline (13-2), material jar overflow pipeline (1-1) is kept away from the one end of material jar (1) and material jar blowdown pipeline (1-2) are kept away from the one end of material jar (1) all is connected to the drain.
2. The PID-controlled charging system of claim 1, wherein: be provided with on first feed liquid pipeline (1-4) and be close to first control valve (2) of material jar (1) and be close to first manual valve (3) of filter (4), first feed liquid pipeline (1-4) intercommunication has wash water pipeline (4-1) and compressed air pipeline (4-2), just wash water pipeline (4-1) and compressed air pipeline (4-2) all communicate to between first control valve (2) and first manual valve (3).
3. The PID-controlled charging system of claim 1, wherein: and a second manual valve (5) is arranged between the filter (4) and the feed pump (6).
4. The PID-controlled charging system of claim 1, wherein: the fourth liquid pipeline (7-10) is communicated with a liquid sampling pipeline (7-1), the fourth liquid pipeline (7-10) is provided with a third manual valve (8), the liquid sampling pipeline (7-1) is provided with a fourth manual valve (9), and the liquid sampling pipeline (7-1) is communicated to one side, close to the flowmeter (7), of the third manual valve (8).
5. The PID-controlled charging system of claim 1, wherein: the double-medium charging nozzle (12) is communicated with an atomizing steam pipeline (11).
6. The PID-controlled charging system of claim 2, wherein: the feed liquid recycling system is characterized in that a second control valve (14) is arranged on the feed liquid conveying pipeline (1-5), a third control valve (15) is arranged on the charging bucket cleaning water pipeline (1-6), a fourth control valve (17) is arranged on the cleaning water pipeline (4-1), a fifth control valve (18) is arranged on the compressed air pipeline (4-2), a sixth control valve (19) is arranged on the charging bucket blowdown pipeline (1-2), and a seventh control valve (20) is arranged on the charging bucket feed liquid recycling pipeline (1-3).
7. The PID-controlled charging system of claim 1, wherein: the feed pump (6) is a gear pump, and the flowmeter (7) is an anti-blocking flowmeter.
8. The PID-controlled charging system of claim 1, wherein: the port A of the first three-way control valve (10) is communicated with the fourth feed liquid pipeline (7-10), the port B of the first three-way control valve (10) is communicated with the fifth feed liquid pipeline (10-12), the port C of the first three-way control valve (10) is communicated with the first feed liquid return pipeline (10-13), and the first three-way control valve (10) has two flow states of A-B and A-C; the opening A of the second three-way control valve (13) is communicated with the first material liquid return pipeline (10-13), the opening B of the second three-way control valve (13) is communicated with the second material liquid return pipeline (13-1), the opening C of the second three-way control valve (13) is communicated with the material liquid sewage pipeline (13-2), and the second three-way control valve (13) has two flowing states of A-B and A-C.
9. The method of using a PID controlled charging system according to any one of claims 1 to 8, comprising the steps of:
s1: dispensing the formula; setting feeding parameters, wherein the feeding parameters comprise tobacco flow and feeding ratio;
s2: material liquid is required; opening a second control valve, and loading the feed liquid required by production into the charging bucket through a feed liquid conveying pipeline;
s3: pre-filling feed liquid; starting the feed pump to enable the feed liquid in the feed tank to return to the feed tank through the feed pump, the flowmeter, the first three-way control valve (the port A flows to the port C) and the second three-way control valve (the port A flows to the port B);
s4: starting feeding; the feed liquid is mixed with the atomized steam in the atomized steam pipeline through the conversion of a first three-way control valve (from the opening A to the opening B), and the mixture is sprayed and fed through a double-medium feeding nozzle;
s5: PID control feeding; performing PID control on feeding according to the real-time flow of the tobacco leaves, the feeding parameters, the rotating speed of a feeding pump and the reading of a flowmeter;
s6: finishing the feeding; after the flow of the tobacco leaves is zero, switching a first three-way control valve (from the port A to the port C) and closing the feeding pump;
s7: recovering the feed liquid; opening the fifth control valve, and blowing the feed liquid in the pipeline back to the feed tank by using compressed air through the charging pump, the flowmeter, the first three-way control valve (the port A flows to the port C) and the second three-way control valve (the port A flows to the port B); then opening a seventh control valve to recover the feed liquid in the charging bucket;
s8: cleaning a pipeline charging bucket; opening a fourth control valve, using clean water to sequentially pass through a charging pump, a flowmeter, a first three-way control valve (an opening A flows to an opening C) and a second three-way control valve (an opening A flows to an opening C), cleaning a pipeline, and beating the cleaning water to treat a sewage outlet; then opening a fifth control valve, and blowing clean cleaning water in the pipeline by using compressed air through a charging pump, a flow meter, a first three-way control valve (an opening A flows to an opening C) and a second three-way control valve (an opening A flows to an opening C); and opening the third control valve to clean the charging bucket through the cleaning nozzle by using cleaning water, and then opening the sixth control valve to discharge the cleaning water in the charging bucket to a sewage discharge outlet.
10. The method of using a PID controlled charging system as claimed in claim 9, characterized in that:
in performing step S3, the feed liquid pre-filling includes two stages; the first stage is open-loop control, a charging pump is started for pre-filling, and the rotating speed of the charging pump is controlled to be 60-80% of the rated rotating speed so as to realize that the feed liquid is quickly filled in a pipeline; and the second stage is closed-loop control, and the feed liquid is automatically controlled to be pre-filled by PID by controlling the rotating speed of a feeding pump according to the flow rate and the feeding ratio of the tobacco leaves as input signals of PID control.
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