CN203446505U - Double PID control system used for cut stem drying machine - Google Patents
Double PID control system used for cut stem drying machine Download PDFInfo
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- CN203446505U CN203446505U CN201320309575.2U CN201320309575U CN203446505U CN 203446505 U CN203446505 U CN 203446505U CN 201320309575 U CN201320309575 U CN 201320309575U CN 203446505 U CN203446505 U CN 203446505U
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Abstract
The utility model discloses a double PID control system used for a cut stem drying machine. The double PID control system used for the cut stem drying machine includes a PLC control system and three temperature sensors. The three temperature sensors are arranged in output ports of heat exchangers in a first control zone, a second control zone and a third control zone. Signal output terminals of the three temperature sensors are connected with the PLC control system. An output terminal of the PLC control system controls opening degrees of three air doors respectively. Pressure sensors are arranged in output ports of pneumatic film valves in the first control zone and the second control zone. Signal output terminals of the pressure sensors are connected with a signal input terminal of the PLC control system. A signal output terminal of the PLC control system is connected with control terminals of the pneumatic film valves in the first control zone and the second control zone and controls the opening degrees. By adopting the double PID control, water content control precision of an outlet is increased substantially and fluctuation range is small and within an indication range, influence on water control due to material element and vapor element is reduced, and occurrence probability of large fluctuation is eliminated effectively.
Description
Technical field
The utility model relates to the stem drying machine in a kind of tobacco business, relates in particular to a kind of two PID control systems of stem drying machine.
Background technology
At present, stem is as one of cigarette important component part, its crudy whether stablize the interior external quality that directly affects cigarette, and stem drying machine is to control the most important ring of stem crudy, its process control ability to stem temperature and moisture content, directly affects the final processing quality of stem product.
By investigation, find that the dry outlet of stem moisture content Measure of Process Capability is obviously on the low side, the fluctuation of outlet moisture content is larger, and when especially the fluctuation of supplied materials moisture content is larger, the control ability of outlet moisture content obviously declines.Stem is dried on controlling and is divided into San Ge district, there are independently temperature and air quantity control in each district, by moisture content of outlet instrument, detect and feed back, when moisture content actual value and setting value have deviation, program regulates automatically, if when stem drying machine outlet moisture content does not reach setting value, control system is preferentially adjusted Second Region temperature, when Second Region is adjusted to the limit and still can not reaches requirement, adjust ,San district, a district temperature to meet outlet stem moisture content.Due to the temperature in San Ge district, control and all adopt steam heat-exchanger, certainly will cause whole system response speed partially slow; (data signal that can provide by host computer is carried out the folding of valve to Pneumatic diaphragm valve, control by valve body steam number) can only control the steam passing through by fixing aperture, in slave mode not, can not dynamically control, when vapour source steam pressure changes, the aperture of Pneumatic diaphragm valve is certain, can not vary with temperature in time and adjust, cause temperature excessive because vapour source problem changes, the control of impact outlet moisture content.When fluctuation or pressure appear in Steam moisture, change while waiting uncontrollable factor, control system can not control effectively, and temperature is produced to considerable influence, causes the fluctuation of outlet moisture content larger, and moisture content reaches stable time growth, and process control ability is poor.
Utility model content
The purpose of this utility model is to provide a kind of control system of stem drying machine, can improve the control accuracy of outlet moisture content.
The utility model adopts following technical proposals: the two PID control systems of a kind of stem drying machine, comprise PLC control system, three temperature sensors, three temperature sensors are separately positioned on the first control zone, the equipped at outlet port of heat exchanger in the second control zone and the 3rd control zone, the signal output part of three temperature sensors connects PLC control system, the output of PLC control system is controlled respectively the aperture of three air doors, the delivery outlet of the Pneumatic diaphragm valve in the first control zone and the second control zone is respectively arranged with pressure sensor, the signal output part of described pressure sensor is connected with the signal input part of PLC control system, the signal output part of described PLC control system connects respectively the control end of Pneumatic diaphragm valve in the first control zone and the second control zone, control its aperture.
Described PLC control system communicates to connect by middle control I/O server and host computer.
Described pressure sensor is connected with PLC control system by PROFIBUS-PA bus.
The utility model is by adding pressure sensor to stem drying machine one He Er district, district, carrying out two PID controls, greatly improved the control accuracy of outlet moisture content, make its minor swing in indication range, reduce the impact that supplied materials factor and vapour source factor are controlled moisture, effectively eliminate large fluctuation and occur.PLC control system is in conjunction with two district's wind-warm syndrome setting values, again according to moisture content of outlet instrument setting value and actual value difference feedback, revise two district's throttle openings and regulate wind-warm syndrome, moisture is controlled can intervene in advance, can revise in time two district's wind-warm syndrome according to moisture content of outlet deviation again, thereby before and after forming, moisture is controlled two closed loop programs controls that He Er district wind-warm syndrome is controlled, and has improved control accuracy.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present utility model.
The specific embodiment
As shown in Figure 1, the utility model discloses the two PID control systems of a kind of stem drying machine, comprise PLC control system, three temperature sensors, three temperature sensors are separately positioned on the first control zone, the equipped at outlet port of heat exchanger in the second control zone and the 3rd control zone, the signal output part of three temperature sensors connects PLC control system, the output of PLC control system is controlled respectively the aperture of three air doors, the delivery outlet of the Pneumatic diaphragm valve in the first control zone and the second control zone is respectively arranged with pressure sensor, the signal output part of described pressure sensor is connected with the signal input part of PLC control system, the signal output part of described PLC control system connects respectively the control end of Pneumatic diaphragm valve in the first control zone and the second control zone, control its aperture.Wherein said pressure sensor is connected with PLC control system by PROFIBUS-PA bus; Described PLC control system communicates to connect by middle control I/O server and host computer, pressure sensor data sends to PLC control system, PLC routine data is communicated by letter with host computer by middle control I/O server, by pressure transmitter data visualization, by monitored picture, carry out PID adjusting, and warning message is visual, monitoring state of network and warning message at any time.
The Pneumatic diaphragm valve of the first control zone and the second control zone, pressure transmitter are realized pressure P ID and are regulated, by the difference of pressure actual value and setting value, relatively control like this aperture size of Pneumatic diaphragm valve, forming one-level PID controls, minimizing, because of the membrane valve output pressure fluctuation that vapour source pressure wave power need cause, solves vapour source pressure transient problem; On the basis of steady pressure, realizing temperature PID regulates, wind-warm syndrome is controlled and air door regulates, according to actual temperature and design temperature deviation, calculated to control the size of throttle opening, form secondary PID control, two PID control separate, be independent of each other, form independently closed-loop control, thereby eliminate vapour source factor to temperature controlled impact, under minor swing state, realize accurate smooth adjustment.
Claims (3)
1. two PID control systems of a stem drying machine, comprise PLC control system, three temperature sensors, three temperature sensors are separately positioned on the first control zone, the equipped at outlet port of heat exchanger in the second control zone and the 3rd control zone, the signal output part of three temperature sensors connects PLC control system, the output of PLC control system is controlled respectively the aperture of three air doors, it is characterized in that: the delivery outlet of the Pneumatic diaphragm valve in the first control zone and the second control zone is respectively arranged with pressure sensor, the signal output part of described pressure sensor is connected with the signal input part of PLC control system, the signal output part of described PLC control system connects respectively the control end of Pneumatic diaphragm valve in the first control zone and the second control zone, control its aperture.
2. the two PID control systems of stem drying machine according to claim 1, is characterized in that: described PLC control system communicates to connect by middle control I/O server and host computer.
3. the two PID control systems of stem drying machine according to claim 2, is characterized in that: described pressure sensor is connected with PLC control system by PROFIBUS-PA bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320309575.2U CN203446505U (en) | 2013-05-31 | 2013-05-31 | Double PID control system used for cut stem drying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320309575.2U CN203446505U (en) | 2013-05-31 | 2013-05-31 | Double PID control system used for cut stem drying machine |
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| Publication Number | Publication Date |
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| CN203446505U true CN203446505U (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320309575.2U Expired - Lifetime CN203446505U (en) | 2013-05-31 | 2013-05-31 | Double PID control system used for cut stem drying machine |
Country Status (1)
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| CN (1) | CN203446505U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106072743A (en) * | 2016-06-17 | 2016-11-09 | 河南中烟工业有限责任公司 | A kind of stem method of quality control being dried based on stem and system |
| CN108378406A (en) * | 2018-04-11 | 2018-08-10 | 红塔烟草(集团)有限责任公司 | Smoked sheet multiple roasting machine moisture regain area's temperature/humidity control method and its system |
| CN112034791A (en) * | 2020-07-10 | 2020-12-04 | 张家口卷烟厂有限责任公司 | Intelligent control system and method for sheet cut-tobacco drier |
-
2013
- 2013-05-31 CN CN201320309575.2U patent/CN203446505U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106072743A (en) * | 2016-06-17 | 2016-11-09 | 河南中烟工业有限责任公司 | A kind of stem method of quality control being dried based on stem and system |
| CN106072743B (en) * | 2016-06-17 | 2018-05-25 | 河南中烟工业有限责任公司 | A kind of stem method of quality control and system based on stem drying |
| CN108378406A (en) * | 2018-04-11 | 2018-08-10 | 红塔烟草(集团)有限责任公司 | Smoked sheet multiple roasting machine moisture regain area's temperature/humidity control method and its system |
| CN108378406B (en) * | 2018-04-11 | 2021-02-19 | 红塔烟草(集团)有限责任公司 | Temperature and humidity control method and system for moisture regain area of tobacco flake redrying machine |
| CN112034791A (en) * | 2020-07-10 | 2020-12-04 | 张家口卷烟厂有限责任公司 | Intelligent control system and method for sheet cut-tobacco drier |
| US11576420B2 (en) | 2020-07-10 | 2023-02-14 | Zhangjiakou Cigarette Factory Co., Ltd | Intelligent control system and method of thin plate drier for cut tobacco |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 450000 Yulin South Road, Henan, Zheng Dong, No. 16 South Road, Zhengzhou Patentee after: CHINA TOBACCO HENAN INDUSTRIAL Co.,Ltd. Address before: 450000 Zhengzhou agricultural road, Henan, No. 29 Patentee before: CHINA TOBACCO HENAN INDUSTRIAL Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |