CN112230610B - Network System of Helium Cryogenic Control System - Google Patents
Network System of Helium Cryogenic Control System Download PDFInfo
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- CN112230610B CN112230610B CN202010972507.9A CN202010972507A CN112230610B CN 112230610 B CN112230610 B CN 112230610B CN 202010972507 A CN202010972507 A CN 202010972507A CN 112230610 B CN112230610 B CN 112230610B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/33—Director till display
- G05B2219/33139—Design of industrial communication system with expert system
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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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a network system of a helium low-temperature control system, which relates to the technical field of low-temperature engineering. The invention combines the functional characteristics and the required grade of the helium cryogenic system to formulate a risk prevention and control strategy, divide a special communication network, disperse specific tasks and centralize hierarchical management, and can meet the operation requirement of a large-scale complex helium cryogenic plant-grade cryogenic control system. The network structure of the helium low-temperature control system provided by the invention has universality and is suitable for industrial process control systems.
Description
Technical Field
The invention relates to the technical field of low-temperature engineering, in particular to a network system of a helium low-temperature control system.
Background
Helium is the most difficult gas to liquefy in nature, has a very low critical temperature of 5.2K, and has a boiling point of 4.2K at normal atmospheric pressure. Helium is extremely stable in chemical properties, has the advantages of high specific heat, high thermal conductivity, low density and the like, and is an excellent low-temperature refrigerant.
With the rapid development of low-temperature and superconducting technologies, helium cryogenic systems have been widely used in high-energy physics, energy security, strategic resources and basic scientific research, and the refrigerating capacity of large helium cryogenic systems in the temperature range from 20K to liquid helium ranges from hundreds of watts to tens of kilowatts. With the rapid development of domestic science and technology, the demand on a large helium cryogenic system is more urgent, and the stability of the system directly influences the safe operation of the device.
The control structure of the large helium cryogenic system usually adopts a network structure based on a programmable controller supplier, a field layer adopts a local or remote slave station, a control layer adopts a programmable controller, and a management layer adopts a human-computer interaction interface. With the equipment scale industrialization and the complicated use environment of the large-scale helium cryogenic system, higher requirements are put on the large-scale helium cryogenic control system.
The helium low-temperature factory control system is required to have the characteristics of interface standardization, function modularization and structure openness, and a network structure which takes industrial communication as a core and is used for centralized management, decentralized control and flexible configuration is realized. In addition, the control system of a large-scale helium cryogenic plant has to consider the problems of equipment safety, personal safety, occupational health and the like in different regions and is compatible with other external control systems.
Disclosure of Invention
In view of this, the present invention provides a network system of a helium cryogenic control system, which is suitable for a cryogenic control system used in a large-scale helium cryogenic plant, is used for designing and operating a control system of a large-scale complex helium cryogenic plant, and can provide technical specifications for engineering implementation of the control system of the large-scale helium cryogenic plant.
In order to achieve the purpose, the technical scheme of the invention is as follows: the method comprises the following steps: a top monitoring layer, a communication network layer and a field control layer.
The top monitoring layer comprises a top control system, a top interlocking system and a top safety system.
The field control layer comprises at least one low-temperature field control subsystem, and the low-temperature field control subsystem comprises more than one of an interlocking controller, a process controller and a safety controller;
the communication network layer is provided with a low-temperature internal network, a field control network, a top-layer interlocking network and a top-layer safety network.
The low-temperature internal network respectively acquires a control signal and an interlocking signal from the process controller and the interlocking controller.
The field control network is used for realizing data communication between the top-level control system and the process controller and the interlocking controller in the field control layer.
The top-level interlocking network is used for realizing data communication between the top-level interlocking system and the interlocking controller in the field control layer.
The top-level security network is used to implement data communication between the top-level security system and security controllers in the field control layer (20).
Further, the top-level control system monitors the control signals, the interlocking signals and the safety signals of the field control layer in real time by accessing the field control network, the top-level interlocking network and the top-level safety network, and controls the process controller to realize the process control of the field control layer according to the operation modes and the conversion conditions of the division of the field control layer.
The top-level interlocking system monitors the interlocking signals and the safety signals of the field control layer in real time by accessing a top-level interlocking network and a top-level safety network, and controls the interlocking controller to realize the equipment protection of the field control layer according to the interlocking events and the interlocking measures divided by the field control layer.
The top safety system monitors the safety signal of the field control layer in real time by accessing the top safety network, and controls the safety controller to realize the field occupational safety of the field control layer according to the safety events and the safety measures divided by the field control layer.
Further, the communication network layer adopts a PROFIBUS, PROFINET or ETHERNET standard field bus protocol.
Further, the field control layer comprises a refrigerating machine control system, a low-temperature cooling control system and a low-temperature auxiliary control system.
The refrigerator control system includes a first interlock controller, a first process controller.
The cryogenic cooling control system includes a second interlock controller, a second process controller, and a safety controller.
The cryogenic auxiliary control system includes a third interlocking controller and a third process controller.
Further, the control signal of the field control layer comprises pressure, temperature, flow, rotating speed, current and vacuum degree of a low-temperature field; and according to the operation mode of the top control system, flow control of a field control layer is realized through an actuating mechanism comprising a regulating valve, a driving motor, a brake and a heater, and the flow control comprises a cooling process, a stable operation and a temperature return process.
The interlocking signals of the field control layer comprise pressure, temperature, flow, rotating speed, current and vacuum degree from a low-temperature field, and equipment protection of the low-temperature system is realized through interlocking operation including scram, cut-off and evacuation according to the interlocking events of the top-layer interlocking system.
The safety signals of the field control layer comprise pressure, temperature, flow, rotating speed, current and vacuum degree from a low-temperature field, and the occupational safety of the low-temperature system is realized through safety measures including scram, cutting off and isolation according to the safety events of the top-layer safety system.
Has the advantages that:
the top monitoring layer of the invention adopts an open management system architecture, the low-temperature field system adopts a general industrial controller, the low-temperature communication network adopts a mature industrial communication network, and the system is divided into process control, interlocking control, safety control and the like according to the characteristics of the field sub-control system. The invention combines the functional characteristics and the required grade of the helium cryogenic system to formulate a risk prevention and control strategy, divide a special communication network, disperse specific tasks and centralize hierarchical management, and can meet the operation requirement of a large-scale complex helium cryogenic plant-grade cryogenic control system. The network structure of the helium low-temperature control system provided by the invention has universality and is suitable for industrial process control systems.
Drawings
Fig. 1 is a network system composition diagram of a helium cryogenic control system according to an embodiment of the present invention.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The network structure of the helium cryogenic control system provided by the invention comprises a top monitoring layer, a field control layer and a communication network layer, as shown in fig. 1.
The top monitoring layer includes: a top level control system responsible for low temperature process operation, a top level interlock system responsible for equipment protection, and a top level safety system responsible for occupational health.
The field control layer includes the following: the system comprises a plurality of low-temperature field sub-control systems which are divided according to different areas or functions, wherein each low-temperature field sub-control system comprises a refrigerator control system for acquiring low-temperature working media, a low-temperature cooling control system for distributing the low-temperature working media and a low-temperature auxiliary control system for managing low-temperature peripheral equipment.
The communication network layer includes: the system comprises a top-level safety network for realizing data interaction between a top-level safety system and a low-temperature field safety controller, a top-level interlocking network for realizing data interaction between a top-level interlocking system and the low-temperature field interlocking controller, a field control network for realizing data interaction between a top-level control system and a field process controller, and a low-temperature internal network for realizing data interaction between low-temperature field sub-control systems;
the working principle is as follows: and dividing the field control layer into a plurality of low-temperature field sub-control systems with different tasks according to the equipment type and the field layout characteristics of the helium low-temperature plant. The sub-control systems of the low temperature field are divided into one or more controllers of the type process controller, interlock controller, safety controller, etc. according to the risk requirements of the sub-control systems. The state signal of the low-temperature field sub-control system realizes the sharing of the state data of the low-temperature system through a low-temperature internal network; the control signal of the low-temperature field sub-control system realizes the access of low-temperature control data through a field control network, and the top-level control system realizes the flow control of the low-temperature system through a field process controller; the interlocking signal of the low-temperature field sub-control system accesses data through a top-layer interlocking network, and the top-layer interlocking system and the field interlocking controller realize the interlocking protection of the low-temperature system; the safety signal of the low-temperature field sub-control system carries out data access through a top-layer safety network, and the safety protection of the low-temperature system is realized by the top-layer safety system and the field safety controller.
As shown in fig. 1, the present invention provides a network system of a helium cryogenic control system, which specifically comprises: a top monitoring layer 10, a field control layer 20, and a communication network layer 30.
The field control layer 20 comprises a plurality of low-temperature field sub-control systems, and is provided with a refrigerating machine control system 21, a low-temperature cooling control system 22 and a low-temperature auxiliary control system 23;
the field control layer 20 is provided with process controllers 211, 221 and 231, measures control signals such as pressure, temperature, flow, rotating speed, current, vacuum degree and the like from a low-temperature field in real time, and realizes flow control such as a cooling process, a stable operation, a temperature return process and the like of the low-temperature system through actuating mechanisms such as a regulating valve, a driving motor, a brake, a heater and the like according to an operation mode of the top control system 11;
the field control layer 20 is provided with interlocking controllers 212, 222 and 232, measures interlocking signals such as pressure, temperature, flow, rotating speed, current, vacuum degree and the like from a low-temperature field in real time, and realizes equipment protection of the low-temperature system through interlocking operations such as scram, cut-off, emptying and the like according to the interlocking events of the top-layer interlocking system;
the field control layer 20 is provided with a safety controller 223 for measuring safety signals such as pressure, temperature, flow, rotating speed, current, vacuum degree and the like from a low-temperature field in real time, and realizing the occupational safety of the low-temperature system through interlocking operations such as scram, cutting off, isolation and the like according to the safety events of the top-layer safety system.
The communication network layer 30 is provided with a low-temperature internal network 31, a field control network 32, a top-layer interlocking network 33 and a top-layer safety network 34;
the low-temperature internal network 31 is formed by low-temperature field process controllers 211, 221 and 231 and low-temperature field interlocking controllers 212, 222 and 232, and realizes data sharing of low-temperature system status signals from different instruments and controllers through a PROFIBUS field bus standard;
the field control network 32 is formed by the top-level control system 11, the low-temperature field process controllers 211, 221 and 231 and the low-temperature field interlocking controllers 212, 222 and 232, and realizes data communication between low-temperature field control signals from different controllers and the top-level control system 11 through a PROFINET field bus standard;
the top interlock network 33 is formed by the top interlock system 12, the low-temperature field interlock controllers 212, 222 and 232, and realizes data communication between low-temperature field interlock signals from different interlock controllers and the top interlock system 12 through a PROFINET field bus standard;
the top-level security network 34 is formed by the top-level security system 13 and the field security controller 223, and data communication of the low-temperature field security signal from the field security controller 223 with the top-level security system 13 is realized by the PROFINET field bus standard.
The top monitoring layer 10 is provided with a top control system 11, a top interlocking system 12 and a top safety system 13;
the top-level control system 11 monitors the control signals, the interlocking signals and the safety signals of the communication network layer in real time by accessing the field control network 32, the top-level interlocking network 33 and the top-level safety network 34, and realizes the flow control of the low-temperature system by the low-temperature field process controller according to the divided operation modes and the conversion conditions of the low-temperature system;
the top layer interlocking system 12 monitors the interlocking signals and the safety signals of the low-temperature communication network in real time by accessing the top layer interlocking network 33 and the top layer safety network 34, and realizes the equipment protection of the low-temperature system by the low-temperature field interlocking controller according to the interlocking events and the interlocking measures divided by the low-temperature system;
the top safety system 13 monitors the safety signal of the low-temperature communication network in real time by accessing the top safety network 34, and the low-temperature field safety controller realizes the field occupational safety of the low-temperature system according to the divided safety events and the safety measures of the low-temperature system.
The working process of the system is as follows:
status signals of all instruments and controllers from the field control layer 20 are accessed to the low-temperature internal network 31, so that internal data of the low-temperature control system are shared; all control signals from the field control layer 20 are accessed to the field control network 32, the top control system 11 sends control commands to the corresponding process controllers 211, 221, 231 according to the control signals and the operation mode, and the corresponding process controllers implement flow operations; all interlock signals from the field control layer 20 are accessed to the top interlock system 12 through the top interlock network 33, and the low temperature system interlock operation is implemented by the top interlock system 12 and the field interlock controllers 212, 222 and 232; all safety signals from field control layer 20 access top safety system 13 through top safety network 34, and cryogenic system safety operations are performed by top safety system 13 and field safety controller 223.
In conclusion, the embodiment of the invention can effectively decompose the control task and the control level of the low-temperature field complex system, establish the special communication network to realize the data inter-access of the same type of controllers at the same level, and establish the access authority among different communication networks. The embodiment of the invention has the advantages of hierarchical control and centralized management, can reduce the construction cost of the control system, has flexible expansibility and is suitable for a low-temperature control system of a large helium low-temperature factory.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
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| US6110586A (en) * | 1998-08-27 | 2000-08-29 | Illinois Tool Works Inc. | Fastener tape fabrication equipment and process |
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| TW200921517A (en) * | 2007-09-21 | 2009-05-16 | Silverbrook Res Pty Ltd | Coding pattern having cell translations identifiable in different orientations |
| KR100964261B1 (en) * | 2008-03-28 | 2010-06-16 | 한국기초과학지원연구원 | Remote Control System of Tokamak Device Using Integrated Network |
| CN101738970A (en) * | 2008-12-17 | 2010-06-16 | 北京德百利泰科技有限公司 | Pollution source data acquisition transmitter, monitoring system and monitoring method |
| CN102420020A (en) * | 2011-11-08 | 2012-04-18 | 厦门大学 | A digital safety interlock system for a magnetic confinement nuclear fusion experimental device |
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