CN201251704Y - Construction site centralized control system for large scale ammonia refrigerating equipments - Google Patents
Construction site centralized control system for large scale ammonia refrigerating equipments Download PDFInfo
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- CN201251704Y CN201251704Y CNU2008200645961U CN200820064596U CN201251704Y CN 201251704 Y CN201251704 Y CN 201251704Y CN U2008200645961 U CNU2008200645961 U CN U2008200645961U CN 200820064596 U CN200820064596 U CN 200820064596U CN 201251704 Y CN201251704 Y CN 201251704Y
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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
A construction site centralized control system for large scale ammonia refrigerating equipments relates to the distributed control system (DCS) technical field, belonging to the construction site large equipment combination control and application field. The construction site centralized control system is mainly composed of an industry computer, a programmable controller PLC, an intelligent temperature controlled meter, a temperature sensor and a system module, wherein the industry computer is connected with the programmable controller PLC via a RS232 interface, the programmable controller PLC is connected with a refrigerating unit via a switch value/analogue value I/O interface, the intelligent temperature controlled meter is connected with the refrigerating unit via the temperature sensor and is connected with the industry computer via a RS-485 interface, and the system module is connected with a CPU chip in the industry computer via a system bus. The construction site centralized control system can realize centralized control on ammonia refrigerating units to complete the control, monitor, parameter setting and automatic demisting on the whole refrigerating system, and can realize online monitor, fault diagnosis and emergency response to avoid normal damage and accident of equipments. Compared with the manual control of accident ratio, the construction site centralized control system can reduce fault rate by 90% or more.
Description
Technical field
The utility model belongs to dcs (DCS) field, the centralized control system of particularly a kind of working-yard macrotype ammonia refrigerating equipment.
Background technology
Along with refrigeration unit continuous application and development technically, automatic control system has become the important component part of refrigeration unit, and the especially introducing of microsystem and development makes the control of refrigeration unit simpler, reliable, perfect.Particularly in large-scale working-yard, although the programmed control even the system controlled by computer that also have part that the various kinds of equipment unit of refrigeration system has, most of refrigeration system still adopts distributing manually to control, and causes many, the complex structure of refrigeration plant.In the refrigeration system that for example has only the device control amount can reach kind more than 100, make that refrigeration system operation is loaded down with trivial details, hidden danger is many, the ruuning situation that has not only increased workload but also various kinds of equipment can not correctly reflect in time.With large-scale working-yard, power station, left bank, Jinghong, Yunnan is example, because this ground belongs to the subtropical zone, the temperature sweltering heat, in order to satisfy the concrete construction temperature requirements, unit in charge of construction has adopted refrigeration system one cover of refrigerating capacity 1,000 ten thousand kilocalories, and this system is divided into aggregate air cooling system, a secondary and mixes and stirs three big systems such as air cooling system, ice-making system.Whole refrigeration system various kinds of equipment quantity reaches 92, the temperature spot of temperature detection reaches 32 positions, system equipment disperses, no matter still be equipment control and monitor angle from the control angle, working strength and difficulty all are quite big, per tour configuration personnel 18-20 people, adopt on-the-spot mode manually control and monitoring, disperse owing to total system is huge, occur maloperation and accident often easily, and be unfavorable for the state that puts into production of total system equipment saturability.
The utility model purpose is exactly that the manually operated large-scale refrigeration plant unit that the scene disperses is combined, at central centralized control room, utilize computing machine and auxiliary monitoring and operational means, can control and monitor whole refrigeration system, in time fully understand the working condition of whole refrigeration system; Not only increase work efficiency greatly, and guarantee the normal operation of safety system, energy regulating system.
The utility model content
Reaching the technical solution of the utility model is expressed as follows:
The centralized control system of a kind of working-yard macrotype ammonia refrigerating equipment, its feature is mainly by industrial computer, programmable controller PLC, the intelligent temperature control table, temperature sensor, system module constitutes, wherein industrial computer is connected with programmable controller PLC by the RS232 interface, programmable controller PLC is connected with refrigeration unit by switching value or analog quantity I/O interface, the intelligent temperature control table is connected with refrigeration unit by temperature sensor, be connected with industrial computer by RS-485 interface, system module is connected with cpu chip in the industrial computer by system bus, and the operation of centralized control Ammonia Refrigerating Equipment unit is to finish the control of a whole set of refrigeration system, monitoring, parameter is provided with, automatic defrosting control.
The centralized control system of described a kind of working-yard macrotype ammonia refrigerating equipment, what it is characterized in that industrial computer selects for use is to grind the above computing machine of magnificent P3-1G.
The centralized control system of described a kind of working-yard macrotype ammonia refrigerating equipment, what it is characterized in that programmable controller PLC selects for use is KOYO SU-6B series.
The centralized control system of described a kind of working-yard macrotype ammonia refrigerating equipment, what it is characterized in that being that the intelligent temperature control table selects for use is the intelligent temperature control table with RS-485 communication port.
The centralized control system of described a kind of working-yard macrotype ammonia refrigerating equipment, what it is characterized in that described temperature sensor selects for use is the PT100 temperature sensor.
In engineering practice, implement to have produced positive its advantage applies of significant effect in the following aspects according to this novel described scheme and measure.
1, the utilization of computing machine and PLC and I/O module has changed traditional manual control mode, belongs to the leading position in the integrated control of water power working-yard large-scale refrigerating system, especially is worth practicing in engineering practice.
2, a situation of change that novel characteristics with real-time, accuracy, integrality, ease for use and compatibility are the various state parameters of system's operation in time shows on computers; The various state parameters of system's operation can accurately reflect the situation of change of fielded system, and the various state parameters of system's operation have reflected the state of system comprehensively; The system database design has good user interface, convenient and reliable operation; System design takes into full account the compatibility of system running environment, system in case of system halt, situation such as out of control do not occur causing.Store by the The data standard of native system, general data layout, can manage by enough third party's data softwares, the exchanges data between convenient simultaneously and higher level nets.
3, utilize computing machine central authorities control Centralized Monitoring not only to realize conventional monitoring, control function, also have on-line monitoring and fault diagnosis functions; And can go out to do emergency reaction, device damage and the accident of avoiding non-normal working to cause; Strengthened equipment the automatic precautionary measures should have been arranged.Compare failure rate with original failure rate of manual control and significantly reduced more than 90%, saved substantial contribution.
Description of drawings
Fig. 1 is described large-scale refrigeration plant centralized control system structured flowchart synoptic diagram.
Fig. 2 is described centralized control master operating station structural representation.
Fig. 3 is the described embodiment first cooling by wind control operation panel figure of system.
Fig. 4 is a described embodiment first cooling by wind system control operation process flow diagram.
Fig. 5 is the first cooling by wind ammonia system process flow diagram that described embodiment computer interface shows
Embodiment
Referring to Fig. 1 Fig. 2 and provide embodiment.Industrial computer, programmable controller PLC, intelligent temperature control table, temperature sensor, system module are to constitute main hardware equipment of the present utility model as can be seen.Wherein industrial computer is mainly selected for use and is ground the above computing machine of magnificent P3-1G.It is to grind magnificent IPC-6100 industrial computer that present embodiment is selected for use.Its powerful Intel P4 processor 2800MHZ dominant frequency, configuration 512MB memory size, the 120G hard-disk capacity, CRT17 inch display and CD-ROM drive floppy drive keyboard and mouse USB, 100M network interface card, RS232 interface etc., possessed powerful extendibility and extendability, by the software support in the system module, satisfied industrial automation control, the requirement of the contour performance high stability of data acquisition, communication and detection.The said system module of the utility model has comprised that the monitoring of tools management software based on the VB6.0 exploitation is written among the SDRAM.System module S) RAM is connected with cpu chip in the industrial computer by system bus, can instruct with control, monitoring, parameter setting, the automatic defrosting control of a whole set of refrigeration system to the operation of Ammonia Refrigerating Equipment unit under the cpu chip centralized control.The IPC-6100 industrial computer is connected with programmable controller PLC by the RS232 interface, what programmable controller PLC selected for use in the present embodiment is KOYO SU-6B series, and its key property comprises program capacity (K language) 15.5, I/0 ability (point) 512, processing speed (μ s) 0.33, instruction type (bar) 191, data register (word) 7840.Type of drive adopts the general CCM agreement of KOYO company; Be connected with refrigeration unit by switching value or analog quantity I/O interface.For example only the PLC of U-05N model has just disposed 10, its load module 16 points, and the PLC of U-05T model has disposed 9, its output module 16 points.The input and output point that needs PLC control and detect in the engineering practice of this refrigeration system can reach up to a hundred.PLC mainly carries out various detection of dynamic here and control is promptly carried out real-time programmed control, state acquisition according to the refrigeration process flow process.And industrial computer mainly carries out data management and monitoring as host computer, industrial computer carries out communication by RS232C interface and PLC, visit relevant register respectively, control with the actual value of obtaining on-the-spot each technological parameter or to the switching value at scene and the aperture of analog quantity such as each by-pass valve control.The intelligent temperature control table is connected with refrigeration unit by temperature sensor, be connected with industrial computer by RS-485 interface, the intelligent temperature control table that is based on the 89C52 single-chip microcomputer that present embodiment intelligent temperature control table is selected for use with communication port, its RS-485 interface selects for use MAX487 as the communication port chip, constitutes temperature polling instrument with temperature sensor platinum resistance PT100; To be its operational amplifier convert the variation of dut temperature to voltage signal to principle of work, carrying out V/F by its LM331 chip is transformed to the T0 mouth that pulse signal inputs to the 89C52 chip and carries out frequency counting, this counting pulse frequency has promptly reflected the size of measured temperature, system carries out the PID computing, if measured temperature does not conform to the default temperature, according to PID result of calculation by the electromagnetic relay adhesive in the optocoupler TIL117 controlling output circuit, carry out thermoregulator control, RS-485 communication port the MAX487 and the main frame of each extension set carry out data communication and transmission simultaneously, can be carried out the temperature of all temp controlled meters by the main frame input parameter and set.The temperature data that system sets is stored in the watchdog chip, and system reports to the police when detected temperatures surpasses the design temperature certain value simultaneously.Select for use 2 intelligent temperature control loggings to realize in the present embodiment to the detection of 16 road temperature signals and by RS-485 interface and industrial computer communication, 16 road temperature signals are sent to industrial computer carry out computing, demonstration, and industrial computer is with its foundation as management, monitoring, parameter setting.
Fig. 3 is the embodiment first cooling by wind control operation panel figure of system described in the utility model, and the control operation of first cooling by wind system will be undertaken by this panel.Fig. 4 is that described first cooling by wind system control operation flow process is introduced embodiment; Fig. 5 is the computer interface flow for displaying picture of producing according to above processing step, and the switching of key frame and each picture realizes with command language with button.
Flowing etc. from the various device running status of the whole as can be seen refrigeration primary system of Fig. 5 window picture, ammoniacal liquor all clearly is presented on the picture, and the refrigeration system technological process such as flow of the operation of blower fan, turnover ammoniacal liquor is showed visually intuitively.
Following embodiment provides the important technological parameters of native system:
1) I/O module: adopt 16 tunnel conversion photoelectricity to isolate.
2) CPU module: possess programming, communication baud rate 38400bps.
3) industrial computer adopts the RS232 serial ports to connect.
4) intelligent temperature control table: PID regulates to report to the police and carries RS485, bus communication.
5) temperature sensor: PT100 temperature range-50 degree---100 degree
System acquisition and communication: industrial computer directly carries out communication with the I/O equipment at scene.
The input of I/O equipment provides the various information of refrigeration unit: whether for example ammonia machine, ammonia pump, power storehouse and the current ruuning situation of auxiliary device, break down or the like.The output of I/O mouth is generally used for field control.For example: the startup of ammonia machine, ammonia pump etc., all kinds of electronic return valves and pilot lamp etc., itself program of some I/O equipment such as PLC is finished the control to the scene, and program is according to value of each output of input decision.The numerical value of input and output leaves in the register of I/O equipment, and register is quoted by other address.Most of I/O equipment provide the PORT COM or the data channel of carrying out communication with miscellaneous equipment or industrial computer, and industrial computer is by the register of these communication channel read-writes I/O equipment, and the data that collect can be used for further monitoring.
Operation instructions:
Should carry out safety inspection before the start, confirm to meet the start condition, otherwise will cause serious consequence.
Operator's console powers on:
1) will control the master operating station key switch and be screwed to open position, and press the startup knob, power light is bright, and the PLC run indicator is bright, and temperature polling instrument LCD begins to show. and (each switch of guidance panel places stop position).
2) open industrial computer, enter refrigeration monitoring management picture.
The first cooling by wind system operation:
1. once-1 system start-up of first cooling by wind:
1) click first cooling by wind system icon enters first cooling by wind system monitoring picture.
2) 1#, 2# evaporative condenser 1#, 2#, the corresponding A1#-A4# solenoid valve with air cooler of 3# ammonia compressor A1#-A4# air cooler 1#, 2# ammonia pump group turn-knob switch are placed automated location.
3) A1#-A4# air cooler defrosting control turn-knob switch is all placed automated location.
4) will be once-1 system select the turn-knob switch to place enable position, once-1 each equipment of system starts relevant device by certain hour successively at interval with follow procedure.
5) in the operational process as will stop a certain equipment, this choice of equipment switch is placed stop position, this equipment both had been forced to stop. noting, even do not place stop position also can quit work automatically with this equipment turn-knob switch of equipment of this equipment tight association.
6) air cooler operation continuous working enters the defrosting programmed control after 4 hours automatically, with the automatic follow procedure start and stop of related each equipment of defrosting. and after defrosting finished, this air cooler put into operation automatically.
7) will be once-1 turn-knob switch place stop position, once-1 system's follow procedure stops at interval each equipment of this system successively with certain hour.
Claims (5)
1, the centralized control system of a kind of working-yard macrotype ammonia refrigerating equipment, its feature is mainly by industrial computer, programmable controller PLC, the intelligent temperature control table, temperature sensor, system module constitutes, wherein industrial computer is connected with programmable controller PLC by the RS232 interface, programmable controller PLC is connected with refrigeration unit by switching value or analog quantity I/O interface, the intelligent temperature control table is connected with refrigeration unit by temperature sensor, be connected with industrial computer by RS-485 interface, system module is connected with cpu chip in the industrial computer by system bus, and the operation of centralized control Ammonia Refrigerating Equipment unit is to finish the control of a whole set of refrigeration system, monitoring, parameter is provided with, automatic defrosting control.
2, the centralized control system of a kind of working-yard according to claim 1 macrotype ammonia refrigerating equipment, what it is characterized in that industrial computer selects for use is to grind the above computing machine of magnificent P3-1G.
3, the centralized control system of a kind of working-yard according to claim 1 macrotype ammonia refrigerating equipment, what it is characterized in that programmable controller PLC selects for use is KOYO SU-6B series.
4, the centralized control system of a kind of working-yard according to claim 1 macrotype ammonia refrigerating equipment, what it is characterized in that being that the intelligent temperature control table selects for use is the intelligent temperature control table with RS-485 communication port.
5, the centralized control system of a kind of working-yard according to claim 1 macrotype ammonia refrigerating equipment, what it is characterized in that described temperature sensor selects for use is the PT100 temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200645961U CN201251704Y (en) | 2008-08-05 | 2008-08-05 | Construction site centralized control system for large scale ammonia refrigerating equipments |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200645961U CN201251704Y (en) | 2008-08-05 | 2008-08-05 | Construction site centralized control system for large scale ammonia refrigerating equipments |
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| CN201251704Y true CN201251704Y (en) | 2009-06-03 |
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| CNU2008200645961U Expired - Fee Related CN201251704Y (en) | 2008-08-05 | 2008-08-05 | Construction site centralized control system for large scale ammonia refrigerating equipments |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106155015A (en) * | 2016-06-28 | 2016-11-23 | 巢湖市金辉自控设备有限公司 | A kind of automatic control system produced for little cylinder silk |
| CN106288598A (en) * | 2016-08-09 | 2017-01-04 | 开封市盛晶仓储服务有限公司 | Freezer refrigerating automatic control system based on distributed photovoltaic power generation and method |
-
2008
- 2008-08-05 CN CNU2008200645961U patent/CN201251704Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106155015A (en) * | 2016-06-28 | 2016-11-23 | 巢湖市金辉自控设备有限公司 | A kind of automatic control system produced for little cylinder silk |
| CN106288598A (en) * | 2016-08-09 | 2017-01-04 | 开封市盛晶仓储服务有限公司 | Freezer refrigerating automatic control system based on distributed photovoltaic power generation and method |
| CN106288598B (en) * | 2016-08-09 | 2018-12-25 | 开封市盛晶仓储服务有限公司 | Freezer refrigerating automatic control system and method based on distributed photovoltaic power generation |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 Termination date: 20170805 |