CN108821227B - Chemical raw material conveying system based on automatic liquid level of computer control - Google Patents
Chemical raw material conveying system based on automatic liquid level of computer control Download PDFInfo
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- CN108821227B CN108821227B CN201810752404.4A CN201810752404A CN108821227B CN 108821227 B CN108821227 B CN 108821227B CN 201810752404 A CN201810752404 A CN 201810752404A CN 108821227 B CN108821227 B CN 108821227B
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- tank
- post
- valve
- material conveying
- tank area
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- 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
- B67D7/0288—Container connection means
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- 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
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- 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
- B67D7/36—Arrangements of flow- or pressure-control valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention provides a chemical raw material conveying system based on automatic liquid level controlled by a computer, which mainly comprises a conveying valve, a tank, a computer, a programmable logic control cabinet (PLC control cabinet for short), a pneumatic cut-off valve, a tank area conveying pump and an electronic scale, wherein the conveying valve is arranged on the tank; the invention mainly solves the problem that the production post can realize automatic material conveying by controlling a computer system.
Description
Technical Field
The invention relates to the field of industrial control and the field of chemical industry, in particular to a chemical raw material conveying system based on automatic liquid level controlled by a computer.
Background
Xinhua pharmaceutical products, Inc., as a large pharmaceutical manufacturing enterprise, requires a large amount of chemical liquid raw materials in the production process. In the past, when materials are conveyed, in order to ensure that the materials can be conveyed accurately and timely, a large amount of manpower is consumed. Moreover, some materials such as highly toxic chemicals dimethyl sulfate, highly corrosive chemicals formic acid and the like have great safety risks in the process of conveying the dangerous materials. A programmable logic controller (hereinafter referred to as PLC system) is a digital arithmetic operation electronic system designed specifically for application in an industrial environment. It uses a programmable memory, in which the instructions for implementing logical operation, sequence control, timing, counting and arithmetic operation are stored, and utilizes digital or analog input and output to control various mechanical equipments or production processes. In order to improve the production efficiency and the stability, accuracy and safety of raw material conveying in the production process, a PLC system is used as a platform to construct a set of material conveying program by collecting and configuring signals of various instruments on site, so that the self-service conveying of materials by post operators is realized.
Disclosure of Invention
The invention provides a chemical raw material conveying system based on automatic liquid level controlled by a computer, which is characterized in that: the system mainly comprises a material conveying valve, a tank, a computer, a programmable logic control cabinet (PLC control cabinet for short), a pneumatic cut-off valve, a tank area material conveying pump and an electronic scale; wherein the tank is divided into a tank area metering tank and a post intermediate tank; the computer is divided into a post control computer and a tank area control computer; the PLC control cabinet is divided into a post PLC control cabinet and a tank field PLC control cabinet; the pneumatic cut-off valve is divided into a pneumatic cut-off valve before a material conveying pump of the tank area, a pneumatic cut-off valve after the material conveying pump of the tank area, a pneumatic cut-off valve at the bottom of the post intermediate tank and a pneumatic cut-off valve before the post intermediate tank.
A industrial chemicals conveying system based on automatic liquid level of computer control, its characterized in that: when materials are conveyed, the system automatically opens a material conveying valve of a tank area metering tank, a pneumatic cut-off valve in front of a tank area material conveying pump, a pneumatic cut-off valve behind the tank area material conveying pump according to the quantity of the requested materials, and finally starts the tank area material conveying pump; during the automatic material conveying period, different kinds of materials can be conveyed simultaneously; and when the weight of the materials in the middle tank of the post reaches the required quantity, automatically closing a material conveying valve of the tank area metering tank and popping up a dialog box to display material conveying information.
A industrial chemicals conveying system based on automatic liquid level of computer control, its characterized in that: the tank area delivery pump can be stopped emergently through an emergency button at any time; the material conveying system automatically closes the material conveying control valve of the tank area metering tank, and simultaneously emergently stops the material conveying pump of the tank area through an emergency button, and signals are displayed on a control computer of the tank area for alarming.
The electronic scale is arranged in the post intermediate tank, the weight of the materials in the post intermediate tank is displayed in real time, and the operation of the whole program is based on the weight displayed on the electronic scale of the post intermediate tank.
The invention mainly solves the problem that the production post can realize automatic material conveying by controlling a computer system.
Drawings
FIG. 1 is a schematic view of an automatic feeding system. 1. A material delivery valve; 2. a tank farm metering tank; 3. a pneumatic cut-off valve in front of a material conveying pump in a tank area; 4. a tank area delivery pump; 5. a pneumatic cut-off valve behind a material conveying pump of the tank area; 6. a post intermediate tank bottom pneumatic cut-off valve; 7. a post intermediate tank; 8. an electronic scale; 9. a post intermediate tank front pneumatic cut-off valve; 10. a post control computer; 11. a post PLC control cabinet; 12. a tank field PLC control cabinet; 13. a tank farm control computer.
Detailed Description
The PCS7 of each process station in the present invention is a separate project and the project of each process station is finally integrated into the multi-project of PCS7 of the tank farm. And establishing communication among a plurality of AS stations, and carrying out network configuration in NetPro. The PLCs of each process station are connected together through an Ethernet through a switch, and then the PLCs control the mutual communication among cabinets by using S7 link in PCS7 software.
The invention designs an automatic material conveying control system of a tank farm, which consists of PCS7 software and an S7-400PLC lower computer, and mainly realizes the functions of data acquisition, control and feedback of field equipment of the tank farm; the upper computer adopts Siemens configuration software winCC to monitor the design of the picture, and realizes the functions of tank area automation, post automation, manual control, bird's-eye view overview, general appearance state, sub-picture state display, alarm recording, alarm setting, historical curve query, report statistics, printing and the like in the material conveying process.
The most prominent programming language used by the present invention is the SFC language. The SFC implements the functions of: selecting a tank, processing a valve and a material conveying pump, switching a tank area metering tank, processing a material conveying button, judging the end of material conveying, processing a conflicted workshop during material conveying, performing overweight alarm on a workshop metering tank and processing a high-liquid-level cut-off material conveying pump. During the period, the automatic start and stop of 8 material conveying pumps and the automatic switch of a plurality of pneumatic valves are automatically completed at one time.
The system SFC functional block is always in an automatic circulation state. When the PLC collects a trigger operation signal, the system enters a driving stage: when a workshop post worker inputs a material conveying set value on the post control computer 10, the input material conveying set value is transmitted to the process post PLC control cabinet 11, a CPU in the control cabinet automatically judges whether the pneumatic cut-off valve 6 at the bottom of the process post tundish is closed, and material conveying can be carried out only when the pneumatic cut-off at the bottom of the process post tundish is in a closed state. Meanwhile, whether a metering tank of which post needs which material or not is judged, and if so, the system pops up a dialog box to prompt 'conflict with material delivery of a certain post, and at the moment, material delivery is not allowed, and a user asks for waiting a little'. If the material is allowed to be delivered, the system can automatically open valves related to the metering tank, such as a tank area material delivery pump front pneumatic cut-off valve 3, a tank area material delivery pump rear pneumatic cut-off valve 5 and a post intermediate tank front pneumatic cut-off valve 9; after the system automatically judges that the judgment requirement is met, the corresponding tank area delivery pump 4 is automatically started; when the data of the electronic scale 8 connected with the post intermediate tank 7 reaches a set value, the system can close the pneumatic cut-off valve related to the post, if other posts use the tank area material conveying pump 4, the tank area material conveying pump 4 cannot be stopped when the material conveying is finished, otherwise, the tank area material conveying pump 4 is automatically stopped, and therefore the automatic material conveying is achieved. In the whole process, the liquid level information of the tank area metering tank in the tank area metering tank 2, the switch information of the pneumatic cut-off valve and the switch information of the delivery pump are all fed back to the PLC control cabinet 12 of the tank area in a signal form, and the PLC system displays the information on the control computer 13 of the tank area in an animation form according to the pre-programmed and configuration program.
In the invention, the weight information of each metering tank is transmitted to a PLC control cabinet in real time through a profibus-DP communication line, the alarm value and the interlocking cut-off value of each material metering tank are preset, and the PLC control cabinet automatically compares the numerical value with the alarm value and the cut-off value when collecting the weight of the metering tank; when the PLC control cabinet collects that the weight data of the post metering tank is larger than or equal to the alarm value of the tank, alarm information is displayed in a configuration picture of the upper computer; when the PLC control cabinet collects that the weight data of the post metering tank is larger than or equal to the cut-off value of the tank, the PLC system forcibly stops the material delivery pump, and the material delivery pump can be started again until the data of the metering tank is smaller than the cut-off value.
Claims (3)
1. The utility model provides a industrial chemicals conveying system based on automatic liquid level of computer control which characterized in that: the system mainly comprises a feeding valve (1), a tank, a computer, a PLC control cabinet, a pneumatic cut-off valve, a tank area delivery pump (4) and an electronic scale (8); wherein the tank is divided into a tank area metering tank (2) and a post intermediate tank (7); the computer is divided into a post control computer (10) and a tank area control computer (13); the PLC control cabinet is divided into a post PLC control cabinet (11) and a tank area PLC control cabinet (12); the pneumatic cut-off valve is divided into a front pneumatic cut-off valve (3) of a tank area material conveying pump (4), a rear pneumatic cut-off valve (5) of the tank area material conveying pump (4), a post intermediate tank bottom pneumatic cut-off valve (6) and a post intermediate tank front pneumatic cut-off valve (9);
when a workshop post worker inputs a material conveying set value on a post control computer (10), the input material conveying set value can be transmitted to a post PLC control cabinet (11), a CPU in the post PLC control cabinet (11) automatically judges whether a post tundish bottom pneumatic cut-off valve (6) is closed or not, and only when the post tundish bottom pneumatic cut-off valve (6) is in a closed state, material conveying can be carried out, meanwhile, which post metering tank needs which material and whether a post conflict condition exists or not are judged, and if a conflict exists, a dialog box can be popped out by a system to prompt that the system conflicts with material conveying of a certain post, and material conveying is not allowed at the moment, and the system asks for the situation to be slightly equal;
when materials are conveyed, the system can automatically open a feeding valve (1) of a tank area metering tank (2), a pneumatic stop valve (3) in front of a tank area delivery pump and a pneumatic stop valve (5) behind the tank area delivery pump according to the quantity of the requested materials, and finally start the tank area delivery pump (4); during the automatic material conveying period, different kinds of materials can be conveyed simultaneously; when the weight of the materials in the tank area metering tank (2) reaches the required quantity, automatically closing a feeding valve (1) of the tank area metering tank (2) and popping up a dialog box to display material conveying information;
when the data of the electronic scale (8) connected with the post tundish (7) reaches a set value, the system can close a pneumatic cut-off valve (3) in front of a tank area feed pump related to the post, a pneumatic cut-off valve (5) behind the tank area feed pump, a pneumatic cut-off valve (6) at the bottom of the post tundish and a pneumatic cut-off valve (9) in front of the post tundish, if other posts use the tank area feed pump (4), the tank area feed pump (4) cannot be stopped when the feed delivery is finished, otherwise, the tank area feed pump (4) is automatically stopped.
2. The system of claim 1, wherein the automated liquid level control system comprises: the tank area conveying pump (4) can be stopped emergently through an emergency button at any time; the raw material conveying system automatically closes a feeding valve (1) of a tank area metering tank, and simultaneously emergently stops a conveying pump (4) of the tank area through an emergency button, and signals are displayed on a tank area control computer (13) for alarming.
3. The system of claim 1, wherein the automated liquid level control system comprises: the electronic scale (8) is arranged in the post intermediate tank, the weight of the materials in the post intermediate tank (7) is displayed in real time, and the operation of the whole program is based on the weight displayed on the post intermediate tank electronic scale (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810752404.4A CN108821227B (en) | 2018-07-10 | 2018-07-10 | Chemical raw material conveying system based on automatic liquid level of computer control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810752404.4A CN108821227B (en) | 2018-07-10 | 2018-07-10 | Chemical raw material conveying system based on automatic liquid level of computer control |
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| CN108821227A CN108821227A (en) | 2018-11-16 |
| CN108821227B true CN108821227B (en) | 2020-08-14 |
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| CN109945072A (en) * | 2019-03-29 | 2019-06-28 | 江西景旺精密电路有限公司 | A kind of removal waste fluid device and method |
| CN112306025A (en) * | 2020-11-02 | 2021-02-02 | 中海石油(中国)有限公司 | Underwater production control monitoring visual monitoring method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2742478Y (en) * | 2004-11-01 | 2005-11-23 | 济南大学 | Flexible burden metering control system device |
| CN2772794Y (en) * | 2005-03-25 | 2006-04-19 | 上海延锋江森座椅有限公司 | Automatic batching system |
| CN202886975U (en) * | 2012-11-12 | 2013-04-17 | 南阳市亚龙筑路机械制造有限公司 | Intelligent control system of asphalt stirring device |
| CN204622340U (en) * | 2014-11-25 | 2015-09-09 | 金昌冠百工贸有限公司 | Aerated blocks produces automatic blending stirring system |
| CN204588681U (en) * | 2015-05-08 | 2015-08-26 | 武汉源锦科技股份有限公司 | The automatic transport of TGA and mercaptopropionic acid and gauging device |
| CN108045961B (en) * | 2018-01-08 | 2023-08-18 | 江苏跃华石化工程有限公司 | Powder pressurized metering and conveying device and conveying method thereof |
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