CN205422842U - Steam turbine valve control system based on CAN bus - Google Patents
Steam turbine valve control system based on CAN bus Download PDFInfo
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- CN205422842U CN205422842U CN201620205646.8U CN201620205646U CN205422842U CN 205422842 U CN205422842 U CN 205422842U CN 201620205646 U CN201620205646 U CN 201620205646U CN 205422842 U CN205422842 U CN 205422842U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The utility model relates to a steam turbine field, concretely relates to steam turbine valve control system based on CAN bus. Including DEH rack and field bus, the DEH rack includes distributed processing unit and data bus, field bus links to each other with data bus, the distributed processing unit links to each other with data bus. The utility model provides a based on the distributed steam turbine valve control system of CAN bus, on having guaranteed the basis of steam turbine valve at operational reliability, realization reduce cost, improvement production efficiency's target.
Description
Technical field
This utility model relates to steam turbine field, is specifically related to a kind of steam turbine valve control system based on CAN.
Background technology
Steam turbine valve control system is an important component part in steam turbine control.Each valve of steam turbine typically uses steam turbine valve control system be adjusted and control.Traditional Valve controlling mode is by hardwire mode, use centerized fusion, concentrating in the analog quantity IO input-output card being connected to steam turbine valve control system by controller or the servo card of each valve, control or feedback signal use the mode of the analogue signal of 4-20mA or-10-+10V.
Use the centerized fusion method of hardwire form, each electromagnetic valve is required in single cable access control system, each electromagnetic valve needs valve position to point and valve position feedback at least two group totally four signal cables, the most numerous power line, digital quantity input/output signal line etc..Therefore, on-site cable is gathered, and on the one hand improves in-site installation cost, is on the other hand not easy to maintenance and transformation.
Fieldbus be applied between field apparatus, digital communication technology between field apparatus and control system, be characterized in instead of analogue signal and the transmission of regular tap amount signal of tradition 4-20mA or-10-+10V with digital communication.CAN is a set of industrial field bus with the feature such as high-performance, high reliability, and international standard is ISO11898.CAN has high reliability and good error detection capability, is widely used in that ambient temperature is severe, electromagnetic radiation strong and vibrates in big industrial control condition.CANOpen agreement is a kind of framework higher layer applications communications protocol in CAN.
Utility model content
The purpose of this utility model is to overcome the deficiency existing for conventional valves control technology, provide a kind of distributed steam turbine valve control system based on CAN, ensure that steam turbine valve is on the basis of operational reliability, it is achieved reduce cost, the target of raising production efficiency.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of steam turbine valve control system based on CAN, including DEH rack and fieldbus, described DEH rack includes disperseing processing unit and data/address bus, and described fieldbus is connected with data/address bus, and described dispersion processing unit is connected with data/address bus.
Also including that host computer and switch, described switch one end are connected with host computer, the other end is connected with dispersion processing unit.
Described dispersion processing unit is DPU, and described data/address bus is DATA-BUS, and described fieldbus is CAN.
Described switch and DPU are two, and are redundancy link.
Also including that CAN address card, described CAN address card are arranged between DATA-BUS and CAN, one end is connected with DATA-BUS, and the other end is connected with CAN.
Also including positioner, described positioner carry is in CAN.
Owing to have employed technique scheme, the beneficial effects of the utility model are:
1, this utility model uses field bus technique based on CAN, it is dispersed between valve positioner and the steam turbine valve control system at scene and can transmit substantial amounts of information, thus realize valve positioner and perform complex task, improve the utilization rate of holding wire, save hardware and put into.The wiring of fieldbus is simpler than tradition hardwire, based on CAN technology, only uses a transmission lines, it is possible to mount multiple valve positioner, has saved in-site installation cost.
2, switch and the redundancy link of DPU, add the stability of system.Even if one of them switch or DPU damage, do not affect the normal work of system.
3, host computer acts primarily as supervisory control system running situation and the effect of change DPU parameter, improves the stability of system.
4, CAN address card realizes data/address bus and the high efficiency of transmission of fieldbus data and conversion, improves system running speed and stability.
Accompanying drawing explanation
Fig. 1 is this utility model structure chart.
Detailed description of the invention
Below in conjunction with the accompanying drawings, this utility model is described in detail.
Embodiment 1
As a kind of preferred embodiment of the present utility model, with reference to Figure of description 1, present embodiment discloses a kind of steam turbine valve control system based on CAN, the present embodiment includes:
A kind of steam turbine valve control system based on CAN, including DEH rack 7 and fieldbus 6, described DEH rack 7 includes disperseing processing unit 3 and data/address bus 4, and described fieldbus 6 is connected with data/address bus 4, and described dispersion processing unit 3 is connected with data/address bus 4.Also including that host computer 1 and switch 2, described switch 2 one end are connected with host computer 1, the other end is connected with dispersion processing unit 3.Described dispersion processing unit 3 is DPU, and described data/address bus 4 is DATA-BUS, and described fieldbus 6 is CAN.Described switch 2 and DPU3 is two, and is redundancy link.Also including that CAN address card (5), described CAN address card 5 are arranged between DATA-BUS4 and CAN 6, one end is connected with DATA-BUS4, and the other end is connected with CAN 6.Also including positioner 8, described positioner 8 carry is in CAN 6.
This utility model uses field bus technique based on CAN, it is dispersed between valve positioner 8 and the steam turbine valve control system at scene and can transmit substantial amounts of information, thus realize valve positioner 8 and perform complex task, improve the utilization rate of holding wire, save hardware and put into.The wiring of fieldbus 6 is simpler than tradition hardwire, based on CAN technology, only uses a transmission lines, it is possible to mount multiple valve positioner 8, has saved in-site installation cost.The redundancy link of switch 2 and DPU3, adds the stability of system.Even if one of them switch 2 or DPU3 damages, do not affect the normal work of system.Host computer 1 acts primarily as supervisory control system running situation and the effect of change DPU3 parameter, improves the stability of system.CAN address card 5 realizes data/address bus 4 and the high efficiency of transmission of fieldbus 6 data and conversion, improves system running speed and stability.
The positioner 8 with CAN 6 interface uses CANOpen bus communication protocol, there is the input/output functions such as position-force control, automatic Verification, Non-follow control, signal amplification, with the signal feeding of individual reception valve location, and the closed loop valve position regulation control of valve setting and the comparison of valve position feedback, PID arithmetic and outputting drive voltage or electric current can be completed by the displacement transducer on servomotor oil cylinder and programming program on the controller.
Positioner 8 is provided with multiple, and positioner 8 controls to control accordingly on steam turbine servomotor valve, it is achieved Valve controlling function.Each positioner 8 has two CAN interfaces.CAN communication card 5 is connected with the CAN1 mouth of positioner 8 by a shielded cable.The CAN2 mouth of positioner 8 is connected with the CAN1 mouth of another location controller 8 by a shielded cable.The CAN2 mouth of each positioner 8 is all connected to the CAN1 mouth of next positioner 8, is continuously connected to N number of positioner 8.The corollary apparatus such as terminal build-out resistor, CAN 6 repeater can be added the when of necessary.
Described CAN 6, DPU3 and DATA-BUS4, the technical term known the most as is known to those skilled in the art.
CAN 6 is the abbreviation of controller local area network, is by the German BOSCH company exploitation famous with research and development and production automobile electronics, and eventually becomes international standard (ISO11898), is one of the most most widely used fieldbus.In North America and West Europe, CAN agreement has become as Computer Controlled System for Vehicle and the STD bus of built-in industrial control area net（CAN）, and has and aim at high capacity waggon and the J1939 agreement of heavy industry motor vehicles and machines design with CAN for underlying protocol.
DPU3 is the abbreviation of dispersion processing unit, and it is a station on WDPF high-speed data highway.Sometimes, DPU is otherwise known as multipurpose controller MAC(Multi-ApplicationController).The control strategy of its energy executive engineer's configuration, it both can realize discrete ladder logic and control, and also can realize continuously adjusting control.DPU can perform more than 70 kind of specific function and 150 various procedures control algolithms；Additionally, it can also realize the functions such as data acquisition, scale conversion, alarm limits inspection, operation note, sequential affair record.
DATA-BUS4 is the English name of data/address bus.
Embodiment 2
As a kind of preferred embodiment of the present utility model, with reference to Figure of description 1, present embodiment discloses a kind of steam turbine valve control system based on CAN, the present embodiment includes:
A kind of steam turbine valve control system based on CAN, including DEH rack 7 and fieldbus 6, described DEH rack 7 includes disperseing processing unit 3 and data/address bus 4, and described fieldbus 6 is connected with data/address bus 4, and described dispersion processing unit 3 is connected with data/address bus 4.Also including that host computer 1 and switch 2, described switch 2 one end are connected with host computer 1, the other end is connected with dispersion processing unit 3.
This utility model uses field bus technique based on CAN, it is dispersed between valve positioner 8 and the steam turbine valve control system at scene and can transmit substantial amounts of information, thus realize valve positioner 8 and perform complex task, improve the utilization rate of holding wire, save hardware and put into.The wiring of fieldbus 6 is simpler than tradition hardwire, based on CAN technology, only uses a transmission lines, it is possible to mount multiple valve positioner 8, has saved in-site installation cost.
Embodiment described above only have expressed the detailed description of the invention of the application, and it describes more concrete and detailed, but therefore can not be interpreted as the restriction to the application protection domain.It should be pointed out that, for the person of ordinary skill of the art, on the premise of conceiving without departing from technical scheme, it is also possible to making some deformation and improvement, these broadly fall into the protection domain of the application.
Claims (6)
1. a steam turbine valve control system based on CAN, it is characterized in that: include DEH rack (7) and fieldbus (6), described DEH rack (7) includes disperseing processing unit (3) and data/address bus (4), described fieldbus (6) is connected with data/address bus (4), and described dispersion processing unit (3) is connected with data/address bus (4).
A kind of steam turbine valve control system based on CAN the most according to claim 1, it is characterized in that, also including host computer (1) and switch (2), described switch (2) one end is connected with host computer (1), and the other end is connected with dispersion processing unit (3).
A kind of steam turbine valve control system based on CAN the most according to claim 2, it is characterised in that described dispersion processing unit (3) is DPU, and described data/address bus (4) is DATA-BUS, and described fieldbus (6) is CAN.
A kind of steam turbine valve control system based on CAN the most according to claim 3, it is characterised in that described switch (2) and DPU(3) be two, and be redundancy link.
A kind of steam turbine valve control system based on CAN the most according to claim 4, it is characterized in that, also include CAN address card, described CAN address card (5) is arranged at DATA-BUS(4) and CAN (6) between, one end and DATA-BUS(4) it is connected, the other end is connected with CAN (6).
A kind of steam turbine valve control system based on CAN the most according to claim 5, it is characterised in that also including positioner (8), described positioner (8) carry is in CAN (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620205646.8U CN205422842U (en) | 2016-03-17 | 2016-03-17 | Steam turbine valve control system based on CAN bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620205646.8U CN205422842U (en) | 2016-03-17 | 2016-03-17 | Steam turbine valve control system based on CAN bus |
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| CN205422842U true CN205422842U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620205646.8U Active CN205422842U (en) | 2016-03-17 | 2016-03-17 | Steam turbine valve control system based on CAN bus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249729A (en) * | 2016-09-29 | 2016-12-21 | 中国电力工程顾问集团西南电力设计院有限公司 | Electrically with DCS Integrated Monitoring System |
| CN109027377A (en) * | 2018-07-06 | 2018-12-18 | 长春市多为尔流体控制设备有限公司 | CAN bus based valve control device |
-
2016
- 2016-03-17 CN CN201620205646.8U patent/CN205422842U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249729A (en) * | 2016-09-29 | 2016-12-21 | 中国电力工程顾问集团西南电力设计院有限公司 | Electrically with DCS Integrated Monitoring System |
| CN109027377A (en) * | 2018-07-06 | 2018-12-18 | 长春市多为尔流体控制设备有限公司 | CAN bus based valve control device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 618000 No. 18, Third Section of Lushan South Road, Deyang City, Sichuan Province Patentee after: Dongfang Electric Automatic Control Engineering Co., Ltd. Address before: 618099 No. 18, Section 3, Lushan South Road, Deyang City, Sichuan Province Patentee before: Sichuan Orient Electric Automatic Control Engineering Co., Ltd. |