CN203240921U - Safety cooling tower based on PLC (Programmable Logic Controller) intelligent control - Google Patents

Safety cooling tower based on PLC (Programmable Logic Controller) intelligent control Download PDF

Info

Publication number
CN203240921U
CN203240921U CN2013202143477U CN201320214347U CN203240921U CN 203240921 U CN203240921 U CN 203240921U CN 2013202143477 U CN2013202143477 U CN 2013202143477U CN 201320214347 U CN201320214347 U CN 201320214347U CN 203240921 U CN203240921 U CN 203240921U
Authority
CN
China
Prior art keywords
cooling tower
plc
hydraulic turbine
water
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2013202143477U
Other languages
Chinese (zh)
Inventor
郑源
范小娟
史金华
朱飞
杨春霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Hehai Technology Co Ltd
Hohai University HHU
Original Assignee
Nanjing Hehai Technology Co Ltd
Hohai University HHU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Hehai Technology Co Ltd, Hohai University HHU filed Critical Nanjing Hehai Technology Co Ltd
Priority to CN2013202143477U priority Critical patent/CN203240921U/en
Application granted granted Critical
Publication of CN203240921U publication Critical patent/CN203240921U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The utility model provides a safety cooling tower based on PLC (Programmable Logic Controller) intelligent control. The safety cooling tower based on PLC intelligent control comprises a cooling tower main body, a draught fan, a water turbine, a variable frequency speed regulation water pump, a return water temperature sensor, a variable frequency speed regulation water pump revolution speed transducer, a water distribution system pipeline pressure sensor, a water turbine water intake pressure sensor, a draught fan revolution speed transducer, a water collection tank liquid level sensor, a yielding water temperature sensor, a data information collection transmission cable, a PLC control cabinet and an optical fiber and is characterized by also comprising a central control room comprising an upper computer, an industrial touch screen and an electromagnetic clutch. Compared with the prior art, the safety cooling tower has the prominent advantages that the safety cooling tower is intelligently controlled by a PLC, so that workers can intuitively, easily and really know the operation state of the whole tower, and faults or irregular operating conditions occurring in each operation link of the cooling tower can be timely precautioned and monitored.

Description

A kind of safe cooling tower based on the PLC Based Intelligent Control
Technical field
The utility model belongs to the cooling tower technical field, particularly relates to a kind of safe cooling tower based on the PLC Based Intelligent Control.
Background technology
Cooling tower plays an important role in the application in the fields such as electric power, oil, chemical industry, iron and steel, light textile and service trade, and particularly the safe and reliable operation of cooling tower systems is more and more important.At present, many circulating water Tower Systems still adopt conventional instrument control in the industrial production, the changes in process parameters situation that the post operation personnel show according to instrumentation, by rule of thumb production process is carried out Artificial Control, large, the inefficiency of working strength not only, and security reliability is poor, cause security incident multiple.During the nearly last ten years, along with the development of cooling tower systems intelligent control technology, preferably resolve cooling tower working strength in service greatly and the difficult problem of high efficiency, but the poor difficult problem of cooling tower security reliability in service not yet obtains satisfied solution.
A kind of " Intellectual cooling tower " that Chinese patent application 97246148.5 proposes is although this scheme can solve the difficult problem that the ventilation of cooling tower changes automatically with payload preferably, to realize energy-conservation and purpose noise reduction; But this only is the Partial controll to cooling tower systems, and the operating general safety reliability of cooling tower systems not yet obtains due monitoring, and potential safety hazard does not still solve.
A kind of intelligent driving device for fan of cooling tower that Chinese patent application 200910242250.5 proposes, this scheme is a kind of intelligent driving device for fan of cooling tower based on hybrid power and Based Intelligent Control, put into operation or out of service by intelligent controller control blower motor, solve energy-conservation and integrity problem, but the ratchet mechanism in this intelligent drive device is by the intermeshing work of multi-gear, mechanical wear will inevitably occur in its running, if wherein a certain gear can't work, may cause whole ratchet mechanism to break down, therefore there is very large potential safety hazard, and without the security control means.
" based on the research of the circulating water cooling tower control system of PLC " literary composition that the report of the academic dissertation of Zhang Hongyu is delivered, proposed employing Siemens industrial computer as host computer, PLC as slave computer, the whole technical process of circulating water cooling tower is monitored and managed, realize the control to main production target and quality index with data acquisition, PID control, but not that the operating general safety integrity problem of cooling tower is still unresolved to the security monitoring of circulating water cooling tower operation.
How to overcome the deficiencies in the prior art and become one of emphasis difficult problem that needs to be resolved hurrily in the current cooling tower technical field.
Summary of the invention
The purpose of this utility model is to provide a kind of safe cooling tower based on the PLC Based Intelligent Control for overcoming the deficiencies in the prior art, the utlity model has the usefulness to early warning, warning and the Real Time Monitoring of cooling tower operation, ensures the safe operation of cooling tower systems.
According to a kind of safe cooling tower based on the PLC Based Intelligent Control that the utility model proposes, it comprises the cooling tower main body, blower fan, the hydraulic turbine, frequency conversion speed adjusting pump, the backwater cooling-water temperature sensor, the frequency conversion speed adjusting pump speed probe, the water distribution system pipe pressure sensor, the hydroturbine water intake pressure sensor, the rotation speed of fan sensor, the header tank liquid level sensor, the output water temperature sensor, gather the transmit information data cable, PLC switch board and optical fiber, characterized by further comprising the central control room that is formed by host computer, graphic control panel, electromagnetic clutch, the PLC switch board is by gathering transmit information data cable and the backwater cooling-water temperature sensor that is arranged on the water return pipeline, be arranged on the speed probe on the frequency conversion speed adjusting pump, be arranged on the water distribution system pipe pressure sensor of hydraulic turbine outlet, be arranged on the intake pressure sensor of hydraulic turbine import, be arranged on the rotation speed of fan sensor on the hydraulic turbine and the blower fan connecting axle, the header tank liquid level sensor that is arranged on the header tank connects with output water temperature sensor on being connected outlet conduit; The information exchange of the cooling tower systems operation of PLC switch board collection is crossed optical fibre transmission to central control room, implements remote monitoring or implements on-site manual control by on-the-spot graphic control panel by central control room again; The output shaft of the hydraulic turbine is connected with blower fan by electromagnetic clutch, and the signal that electromagnetic clutch sends according to central control room or on-the-spot graphic control panel is connected with blower fan enforcement or disconnects the hydraulic turbine.
Safe operation principle of the present utility model: more and more higher to the requirement of security of operation along with the lifting of a circulating water cooling tower running body to colony's synthetic operation, so that conventional processing quality control mode can't satisfy the security control requirements of cooling tower systems.The utility model is based on the safe cooling tower of PLC Based Intelligent Control, by setting in advance the wherein scope of the restriction relation between the different parameters and parameters safe operation, Real-Time Monitoring goes out operating each equipment of cooling tower and whether is in the safe operation state, and whether the coordinated between each equipment is unusual.When abnormal conditions appearred in cooling tower operation somewhere, this safe cooling tower systems can carry out accident analysis to it automatically, and the trouble point is got rid of, and has guaranteed the reliability of cooling tower safe operation.The utility model is under the prerequisite that guarantees single cooling tower safe and reliable operation simultaneously, also can implement safe optimum control to Cooling Towers, so that single cooling tower institute on-load homogenising in the whole Cooling Towers, to prevent single cooling tower to break down because of overload, improve thus the time limit of Cooling Towers safe operation, realize the safe optimum control to Cooling Towers.
The utility model compared with prior art its remarkable advantage is: the one, and safe cooling tower of the present utility model is subjected to the PLC Based Intelligent Control, can make the staff understand intuitively, easily and truly the operation conditions of whole system, can in time make early warning and alert detecting to the fault or the irregular operating situation that occur in each operation link of cooling tower, and abnormal signal is implemented man-machine real-time control; The 2nd, the utility model not only has the remarkable usefulness of security monitoring, and the operating efficiency, the energy efficient that improve cooling tower have also been brought into play important effect; The 3rd, safe operation principle of the present utility model also can realize the safe optimum control to Cooling Towers, in order to solve the difficult problem of the synchronous synergetic operation monitoring of individual security cooling tower and whole Cooling Towers.The utility model extensively is suitable for applying in the fields such as electric power, oil, chemical industry, iron and steel, light textile and service trade.
Description of drawings
Fig. 1 is the structural representation of a kind of safe cooling tower based on the PLC Based Intelligent Control that the utility model proposes.
Fig. 2 is the control principle schematic diagram of a kind of safe cooling tower based on the PLC Based Intelligent Control that the utility model proposes.
Fig. 3 is the control flow schematic diagram of a kind of safe cooling tower based on the PLC Based Intelligent Control that the utility model proposes.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
In conjunction with Fig. 1, a kind of safe cooling tower based on the PLC Based Intelligent Control that the utility model proposes, it comprises cooling tower main body (1), blower fan (2), the hydraulic turbine (3), frequency conversion speed adjusting pump (4), backwater cooling-water temperature sensor (5), frequency conversion speed adjusting pump (4) speed probe (6), water distribution system pipe pressure sensor (7), the hydraulic turbine (3) intake pressure sensor (8), rotation speed of fan sensor (9), header tank liquid level sensor (10), output water temperature sensor (11), gather transmit information data cable (12), PLC switch board (13), optical fiber (14), the central control room (15) that host computer forms, graphic control panel (16) and electromagnetic clutch (17), wherein: backwater cooling-water temperature sensor (5) is arranged on the water return pipeline, speed probe (6) is arranged on the frequency conversion speed adjusting pump (4), water distribution system pipe pressure sensor (7) is arranged on the hydraulic turbine (3) outlet of cooling tower main body (1), intake pressure sensor (8) is arranged on the hydraulic turbine (3) import of cooling tower main body (1), rotation speed of fan sensor (9) is arranged on the connecting axle of the hydraulic turbine (3) and blower fan (2), header tank liquid level sensor (10) is arranged on the header tank, output water temperature sensor (11) is arranged on the outlet conduit, PLC switch board (13) passes through to gather the data cable (12) of transmission information to the rotating speed of blower fan (2), the pressure of water distribution system, the hydraulic turbine (3) intake pressure, the rotating speed of frequency conversion speed adjusting pump (4), return water temperature on the water return pipeline, leaving water temperature on header tank liquid level and the outlet conduit is implemented real-time information collection and monitoring, the output shaft of the hydraulic turbine (3) is connected with blower fan (2) by electromagnetic clutch (17), the signal that electromagnetic clutch (17) sends according to central control room (15) is implemented to be connected or to disconnect to the hydraulic turbine (3) and blower fan (2).
In conjunction with Fig. 2, each sensor of the present utility model is by gathering transmit information data cable (12), real-time rotate speed with the cooling tower that collects on-the-spot blower fan in service (2), the pressure of water distribution system, the hydraulic turbine (3) intake pressure, frequency conversion speed adjusting pump (4) rotating speed, return water temperature on the water return pipeline, leaving water temperature signal on header tank liquid level and the outlet conduit is input in the PLC switch board (13), be transferred to central control room (15) and output signal behind the sequential operation of correspondence by optical fiber (14), to blower fan (2), the hydraulic turbine (3), frequency conversion speed adjusting pump (4) and electromagnetic clutch (17) are controlled automatically, perhaps pass through on-the-spot graphic control panel (16) to blower fan (2), the hydraulic turbine (3), frequency conversion speed adjusting pump (4) and electromagnetic clutch (17) carry out on-site manual control, realize safe and reliable control to cooling tower with this.
In conjunction with Fig. 1 and Fig. 3, take the water outlet temperature setting value of PLC switch board (13) control as T-SP, the actual temperature of leaving water temperature is T-PV, and the leaving water temperature higher limit is T-SP The upper limit, the leaving water temperature lower limit is T-SP Lower limitAs T-PV<T-SP Lower limitThe time, close blower fan (2); Work as T-PV〉T-SP The upper limitThe time, then need to stop the operation of cooling tower, and it is carried out shutdown inspection; Work as T-SP Lower limit<T-PV<T-SP The upper limitThe time, if T-PV<T-SP, the quantity that then needs to improve frequency conversion speed adjusting pump (4) rotating speed or increase frequency conversion speed adjusting pump (4) operation has namely increased the hydraulic turbine (3) intake pressure; If T-PV〉during T-SP, the quantity that then needs to reduce the rotating speed of frequency conversion speed adjusting pump (4) or reduce frequency conversion speed adjusting pump (4) operation has namely reduced the hydraulic turbine (3) intake pressure.In like manner, leaving water temperature on return water temperature on the pressure of water distribution system in this cooling tower, the hydraulic turbine (3) water feeding pressure, the water return pipeline, header tank liquid level, the outlet conduit is monitored, set respectively upper limit value and lower limit value, system can in time report to the police when unusual when data occur, and alarm bell sounds simultaneously.PLC switch board of the present utility model (13) passes through to gather the data cable (12) of transmission information with the rotating speed of blower fan (2), the pressure of water distribution system, the hydraulic turbine (3) intake pressure, the rotating speed of frequency conversion speed adjusting pump (4), return water temperature on the water return pipeline, leaving water temperature on header tank liquid level and the outlet conduit is implemented Real-time Collection, signal after the collection uses STEP7-Micro/WIN to carry out programming after processing through data, use KingView corresponding man-machine interface is set, central control room (15) shows the information in the PLC switch board (13) and the graphic control panel (16) by host computer by optical fiber (14), the output of PLC switch board (13) links to each other with field apparatus again, thereby realizes the Based Intelligent Control to this cooling tower.
The utility model has been obtained satisfied effect through validation trial.

Claims (2)

1. safe cooling tower based on the PLC Based Intelligent Control, it comprises cooling tower main body (1), blower fan (2), the hydraulic turbine (3), frequency conversion speed adjusting pump (4), backwater cooling-water temperature sensor (5), frequency conversion speed adjusting pump (4) speed probe (6), water distribution system pipe pressure sensor (7), the hydraulic turbine (3) intake pressure sensor (8), rotation speed of fan sensor (9), header tank liquid level sensor (10), output water temperature sensor (11), gather transmit information data cable (12), PLC switch board (13) and optical fiber (14), characterized by further comprising the central control room (15) that is formed by host computer, graphic control panel (16), electromagnetic clutch (17), PLC switch board (13) is by gathering transmit information data cable (12) and the backwater cooling-water temperature sensor (5) that is arranged on the water return pipeline, be arranged on the speed probe (6) on the frequency conversion speed adjusting pump (4), be arranged on the water distribution system pipe pressure sensor (7) of the hydraulic turbine (3) outlet, be arranged on the intake pressure sensor (8) of the hydraulic turbine (3) import, be arranged on the rotation speed of fan sensor (9) on the hydraulic turbine (3) and blower fan (2) connecting axle, the header tank liquid level sensor (10) that is arranged on the header tank connects with output water temperature sensor (11) on being connected outlet conduit; The information exchange of the cooling tower systems operation that PLC switch board (13) gathers is crossed optical fiber (14) and is transferred to central control room (15), implements remote monitoring or implements on-site manual control by on-the-spot graphic control panel (16) by central control room (15) again; The output shaft of the hydraulic turbine (3) is connected with blower fan (2) by electromagnetic clutch (17), the signal that electromagnetic clutch (17) sends according to central control room (15) or on-the-spot graphic control panel (16) is connected with blower fan (2) enforcement or disconnects the hydraulic turbine (3).
2. a kind of safe cooling tower based on the PLC Based Intelligent Control according to claim 1 is characterized in that the data cable (12) of PLC switch board (13) by gathering transmission information implement real-time information collection and monitoring to the leaving water temperature on the rotating speed of the pressure of the rotating speed of blower fan (2), water distribution system, the hydraulic turbine (3) intake pressure, frequency conversion speed adjusting pump (4), return water temperature, header tank liquid level and the outlet conduit on the water return pipeline.
CN2013202143477U 2013-04-24 2013-04-24 Safety cooling tower based on PLC (Programmable Logic Controller) intelligent control Expired - Fee Related CN203240921U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013202143477U CN203240921U (en) 2013-04-24 2013-04-24 Safety cooling tower based on PLC (Programmable Logic Controller) intelligent control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013202143477U CN203240921U (en) 2013-04-24 2013-04-24 Safety cooling tower based on PLC (Programmable Logic Controller) intelligent control

Publications (1)

Publication Number Publication Date
CN203240921U true CN203240921U (en) 2013-10-16

Family

ID=49318209

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013202143477U Expired - Fee Related CN203240921U (en) 2013-04-24 2013-04-24 Safety cooling tower based on PLC (Programmable Logic Controller) intelligent control

Country Status (1)

Country Link
CN (1) CN203240921U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103256828A (en) * 2013-04-24 2013-08-21 河海大学 Safe cooling tower system based on programmable logic controller (PLC) intelligent control
CN109405629A (en) * 2018-10-16 2019-03-01 广州合众富华节能环保科技有限公司 A kind of intelligence cooling tower systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103256828A (en) * 2013-04-24 2013-08-21 河海大学 Safe cooling tower system based on programmable logic controller (PLC) intelligent control
CN109405629A (en) * 2018-10-16 2019-03-01 广州合众富华节能环保科技有限公司 A kind of intelligence cooling tower systems

Similar Documents

Publication Publication Date Title
CN103234585A (en) Online monitoring and fault diagnosis system of large wind turbine units
CN204925745U (en) Roots blower intelligent monitoring system
CN102777887B (en) Protection control device and protection control method for constant-differential-pressure electric adjusting valve for water-supply of boiler
CN104179529B (en) Mine Ventilator intelligent monitoring and fault diagnosis system based on Internet of Things and cloud computing
CN103256828A (en) Safe cooling tower system based on programmable logic controller (PLC) intelligent control
CN101819436A (en) System for monitoring running of oil extractor in oil field
CN204007304U (en) Plate type heat exchanger monitoring early-warning system
CN102454589A (en) Frequency conversion cooling tower fan running state monitoring and fault diagnosis remote monitor system
CN203614130U (en) Mine drainage system
CN203240921U (en) Safety cooling tower based on PLC (Programmable Logic Controller) intelligent control
CN102629126A (en) On-line monitoring terminal system for urban pipe network water and monitoring method of urban pipe network water
CN103676783A (en) Monitoring system for cotton picker
CN104423323A (en) Numerical control machine tool remote control system
CN203490073U (en) A real-time monitoring system of a wind-driven generator gear case
CN203337653U (en) Monitoring device for oil pollution state of gear box of wind turbine generator
CN202325873U (en) Remote centralized control device for generator set
CN204082446U (en) Based on the offshore wind farm unit comprehensive monitoring system of 6LoWPAN radio sensing network
CN204788462U (en) Circulation water heat exchanger failure diagnosis experimental system based on wireless sensor
CN203350668U (en) Remote intelligent industrial fan monitoring system
CN202560532U (en) Remote monitoring system for monitoring and fault diagnosis of running states of variable-frequency cooling tower fan
CN202725631U (en) Oil tank automatic drainage device for filmatic bearing lubricating system of rolling mill
CN202120094U (en) Special-purpose controller of foamed plastic machine
CN205375179U (en) Monitoring device is made to thing networking forging
CN109410520A (en) A kind of early warning plate of real-time monitoring hazardous chemical major hazard source warning message
CN103727979A (en) Draught fan vibration on-line monitoring terminal

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131016

Termination date: 20140424

C17 Cessation of patent right