CN207146354U - A kind of medium-and-large-sized gas-steam boiler specific PLC control system - Google Patents
A kind of medium-and-large-sized gas-steam boiler specific PLC control system Download PDFInfo
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- CN207146354U CN207146354U CN201721092621.2U CN201721092621U CN207146354U CN 207146354 U CN207146354 U CN 207146354U CN 201721092621 U CN201721092621 U CN 201721092621U CN 207146354 U CN207146354 U CN 207146354U
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Abstract
The utility model discloses a kind of medium-and-large-sized gas-steam boiler specific PLC control system, including housing, the PLC being arranged in housing and the power input being connected in PLC, on-off model input is connected with PLC, output switch parameter, analog input and output, feed DC24V and communication interface, on-off model input includes the input of 5 tunnel pulse level electrodes, 8 road passive switch inputs and 2 road 220V signals inputs, output switch parameter includes 12 road Controls, analog input and output inputs including 3 road PT100, the 20MA of 3 tunnel 4 is inputted, 1 road K indexing signal inputs and the output of the 20MA normalized currents of 2 tunnel 4.The utility model integrates many control functions with PLC, and main frame carries temperature, pressure analog signal, and without peripheral expansion, product is succinctly stablized, and user can voluntarily increase control function on demand, powerful, cost-effective.
Description
Technical field
It the utility model is related to a kind of control system, more particularly to a kind of medium-and-large-sized gas-steam boiler specific PLC control
System.
Background technology
At present, boiler control system is divided into PLC control system and single-chip computer control system, common PLC controls on the market
System is disadvantageous in that, to be realized that boiler implosion requirement must increase each expansion module combination in PLC peripheries, be caused hardware
Connection is excessive, and fault rate increase, separate unit production time length, for cost price with regard to high, cost performance is low.
And single-chip computer control system is disadvantageous in that, the boiler implosion requirement to be realized must unify, it is impossible to difference
Change control.Control program must be fixed by controller producer, and underaction, function is not powerful, and product is stereotyped, personalized
Low, function is simple.
Utility model content
The utility model is in order to solve defect present in above-mentioned prior art and deficiency, there is provided a kind of by multiple controls
Function integrates, without peripheral expansion can normal use, product succinctly stablizes, and user can also voluntarily increase on demand
Control function, powerful, cost-effective medium-and-large-sized gas-steam boiler specific PLC control system.
The technical solution of the utility model：A kind of medium-and-large-sized gas-steam boiler specific PLC control system, including housing,
The PLC being arranged in housing and the power input being connected in PLC, it is connected with out in the PLC
Pass amount signal input, output switch parameter, analog input and output, feed DC24V and communication interface, the on-off model input
Include 12 including the input of 5 tunnel pulse level electrodes, 8 road passive switch inputs and 2 road 220V signals inputs, the output switch parameter
Road Control, the analog input and output includes 3 road PT100 inputs, 3 road 4-20MA are inputted, 1 road K indexing signals are defeated
Enter and 2 road 4-20MA normalized currents outputs.
The utility model is developed specifically for boiler, many control functions is integrated with PLC, such as electrode
Liquid level signal, combustor control function, main frame carry temperature, pressure analog signal, and without peripheral expansion, product is succinctly stablized, and use
Family can voluntarily increase control function on demand, powerful, cost-effective.
Preferably, 4 tunnels connect measuring cylinder electrode in the 5 tunnel pulse level electrode input, and 1 tunnel connects main body protection electrode.
Water resistance value is sensitive adjustable.
Preferably, 8 road passive switch input difference corresponding pressure low switch, pressure height switch, hyperpressure switchs,
System power-on switch, system shutdown switch, failure silence switch, fault of water pump switch and water pump feedback switch, the 2 road 220V
The corresponding burning operation input of signal input and the input of flame-out failure, the 3 road PT100 inputs are corresponded into flue-gas temperature, gone out respectively
Flue-gas temperature and feed temperature, the 3 road 4-20MA normalized currents input correspond to steam pressure input, liquid level of steam drum input respectively
Inputted with water pump frequency, the corresponding water pump rate-adaptive pacemaker of 2 road 4-20MA normalized currents output, the 1 road K indexing signal input
Corresponding K-type thermocouple.
Wherein 3 road PT100 input (0-500 DEG C), precision 0.5.
Preferably, 12 road Control difference correspondence system Fault Control, burning operation control, system operation control
System, the control of failure alarm bell, water circulating pump is controlled, feed pump controls, combustion air fan controls, load increases control, load reduction is controlled
System, the public line traffic control of Load Regulation, burning starts control and burning stops control.
Preferably, the feed DC24V can connect transmitter and display screen power supply, and its Fu carries Neng Li≤30W 150MA.
Preferably, the communication interface is arranged on shell, and it includes 2 232 communication interfaces and 1 485 communication interface,
235 communication interface can connect touch-screen or text display, and 485 communication interface can connect long-range MODBUS and lead to
News.
Preferably, the PLC is Mitsubishi PLC GX series, selects FX2N step numbers 8000.
The utility model is developed specifically for boiler, many control functions is integrated with PLC, such as electrode
Liquid level signal, combustor control function, main frame carry temperature, pressure analog signal, and without peripheral expansion, product is succinctly stablized, and use
Family can voluntarily increase control function on demand, powerful, cost-effective.
Brief description of the drawings
Fig. 1 is wiring schematic diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings, but is not that model is protected to the utility model
The limitation enclosed.
As shown in figure 1, a kind of medium-and-large-sized gas-steam boiler specific PLC control system, including housing, it is arranged in housing
PLC and the power input that is connected in PLC, be connected with on-off model input, switch in PLC
Output, analog input and output, feed DC24V and communication interface are measured, the on-off model input includes 5 tunnel pulse water levels electricity
Pole input, 8 road passive switch inputs and 2 road 220V signals inputs, the output switch parameter includes 12 road Controls, described
Analog input and output includes 3 road PT100 inputs, 3 road 4-20MA inputs, 1 road K indexing signal inputs and 2 road 4-20MA standards
Electric current exports.The high switch of corresponding pressure low switch, pressure, hyperpressure switch, system startup are opened respectively for 8 road passive switch inputs
Pass, system shutdown switch, failure silence switch, fault of water pump switch and water pump feedback switch, the 2 road 220V signals input pair
Should be burnt operation input and the input of flame-out failure, 3 road PT100 input correspond to respectively into flue-gas temperature, go out flue-gas temperature and
Feed temperature, the 3 road 4-20MA normalized currents input correspond to steam pressure input, liquid level of steam drum input and water pump frequency respectively
Input, the corresponding water pump rate-adaptive pacemaker of 2 road 4-20MA normalized currents output, the corresponding K-type heat of 1 road K indexing signal input
Galvanic couple.12 road Control difference correspondence system Fault Controls, burning operation control, system operation control, failure alarm bell control
System, water circulating pump control, feed pump controls, combustion air fan controls, load increases control, load reduction controls, Load Regulation public affairs
Conllinear control, burning start control and burning stops control.Feed DC24V can connect transmitter and display screen power supply, and it is loaded
Neng Li≤30W 150MA.Communication interface is arranged on shell, and it includes 2 232 communication interfaces and 1 485 communication interface, institute
Touch-screen or text display can be connected by stating 232 communication interfaces, and 485 communication interface can connect long-range MODBUS communications.
PLC is Mitsubishi PLC GX series, selects FX2N step numbers 8000.
The utility model is applied to the medium-and-large-sized gas-steam boilers of 3-30T.Power input is alternating current 220V 185V-260V
Switching Power Supply.
The utility model is developed specifically for boiler, many control functions is integrated with PLC, such as electrode
Liquid level signal, combustor control function, main frame carry temperature, pressure analog signal, and without peripheral expansion, product is succinctly stablized, and use
Family can voluntarily increase control function on demand, powerful, cost-effective.
Claims (7)
1. a kind of medium-and-large-sized gas-steam boiler specific PLC control system, including housing, the PLC that is arranged in housing
With the power input being connected in PLC, it is characterised in that：Be connected with the PLC on-off model input,
Output switch parameter, analog input and output, feed DC24V and communication interface, the on-off model input include 5 road pulsating waters
Position electrode input, 8 road passive switch inputs and 2 road 220V signals inputs, the output switch parameter include 12 road Controls,
The analog input and output includes 3 road PT100 inputs, 3 road 4-20MA inputs, 1 road K indexing signal inputs and 2 road 4-20MA
Normalized current exports.
A kind of 2. medium-and-large-sized gas-steam boiler specific PLC control system according to claim 1, it is characterised in that：Institute
State 4 tunnels in the input of 5 tunnel pulse level electrodes and connect measuring cylinder electrode, 1 tunnel connects main body protection electrode.
A kind of 3. medium-and-large-sized gas-steam boiler specific PLC control system according to claim 1, it is characterised in that：Institute
State 8 road passive switch the inputs high switch of corresponding pressure low switch, pressure, hyperpressure switch, system power-on switch, system respectively
Shutdown switch, failure silence switch, fault of water pump switch and water pump feedback switch, the corresponding burning of 2 road 220V signals input
Operation input and the input of flame-out failure, the 3 road PT100 inputs correspond into flue-gas temperature, go out flue-gas temperature and to water temperature respectively
Degree, the 3 road 4-20MA normalized currents input correspond to steam pressure input, liquid level of steam drum input and the input of water pump frequency respectively,
The corresponding water pump rate-adaptive pacemaker of 2 road 4-20MA normalized currents output, the corresponding K-type thermocouple of the 1 road K indexing signal input.
A kind of 4. medium-and-large-sized gas-steam boiler specific PLC control system according to claim 1, it is characterised in that：Institute
State 12 road Controls difference correspondence system Fault Controls, burning operation control, system operation control, the control of failure alarm bell,
Water circulating pump control, feed pump control, combustion air fan control, load increasing control, load reduce control, Load Regulation common wire
Control, burning start control and burning stops control.
A kind of 5. medium-and-large-sized gas-steam boiler specific PLC control system according to claim 1, it is characterised in that：Institute
Transmitter and display screen power supply can be connected by stating feed DC24V, and its Fu carries Neng Li≤30W 150MA.
A kind of 6. medium-and-large-sized gas-steam boiler specific PLC control system according to claim 1, it is characterised in that：Institute
State communication interface to be arranged on housing, it includes 2 232 communication interfaces and 1 485 communication interface, and 232 communication interface can
Touch-screen or text display are connected, 485 communication interface can connect long-range MODBUS communications.
A kind of 7. medium-and-large-sized gas-steam boiler specific PLC control system according to claim 1, it is characterised in that：Institute
PLC is stated as Mitsubishi PLC GX series, selects FX2N step numbers 8000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721092621.2U CN207146354U (en) | 2017-08-29 | 2017-08-29 | A kind of medium-and-large-sized gas-steam boiler specific PLC control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721092621.2U CN207146354U (en) | 2017-08-29 | 2017-08-29 | A kind of medium-and-large-sized gas-steam boiler specific PLC control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207146354U true CN207146354U (en) | 2018-03-27 |
Family
ID=61670487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721092621.2U Active CN207146354U (en) | 2017-08-29 | 2017-08-29 | A kind of medium-and-large-sized gas-steam boiler specific PLC control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207146354U (en) |
-
2017
- 2017-08-29 CN CN201721092621.2U patent/CN207146354U/en active Active
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