CN203115980U - Boiler Water Level Pressure Interlocking Protection System Based on PLC Control - Google Patents
Boiler Water Level Pressure Interlocking Protection System Based on PLC Control Download PDFInfo
- Publication number
- CN203115980U CN203115980U CN201220725589.8U CN201220725589U CN203115980U CN 203115980 U CN203115980 U CN 203115980U CN 201220725589 U CN201220725589 U CN 201220725589U CN 203115980 U CN203115980 U CN 203115980U
- Authority
- CN
- China
- Prior art keywords
- plc
- water level
- analog
- contact
- input module
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- 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]
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
本实用新型公开了一种基于PLC控制的锅炉水位压力联锁保护系统，具有PLC和SM231模拟量输入模块，RS485连接线实现两者通信，其中：所述PLC的DI接点连接投切开关，DO接点连接控制继电器和报警指示灯，SM231模拟量输入模块的AI接点接入现场模拟量。利用PLC的模拟量输入模块采集现场汽包压力、液位、主汽压力信号，通过PLC内部比较模块进行逻辑运算，达到逻辑规定的动作条件时，PLC输出开关量信号控制排粉风机跳闸或打开向空排汽阀，从而实现联锁功能。其结构简单，安装方便快捷，成本低，稳定可靠。
The utility model discloses a boiler water level pressure interlocking protection system based on PLC control, which has PLC and SM231 analog quantity input module, RS485 connection line realizes the communication between the two, wherein: the DI contact of the PLC is connected with the switching switch, and the DO The contact is connected to the control relay and the alarm indicator light, and the AI contact of the SM231 analog input module is connected to the field analog. Use the analog input module of PLC to collect the on-site steam drum pressure, liquid level, and main steam pressure signals, and perform logic operations through the comparison module inside the PLC. When the action conditions specified by the logic are reached, the PLC outputs the switching signal to control the powder discharge fan to trip or open. To empty the exhaust valve, so as to realize the interlock function. The utility model has the advantages of simple structure, convenient and quick installation, low cost, stable and reliable.
Description
技术领域 technical field
本实用新型属于压力控制技术领域，具体涉及一种基于PLC控制的锅炉水位压力联锁保护系统。 The utility model belongs to the technical field of pressure control, in particular to a boiler water level pressure interlock protection system based on PLC control. the
背景技术 Background technique
现有的85t锅炉，系统多采用盘装柜（仪表）和DCS控制，锅炉联锁和风门控制都通过盘装柜实现，DCS只能监控主要参数。近年来随着安全要求逐渐升高，热电厂要求安装超压、低水位联锁跳闸系统。采用市场上现有的联锁跳闸系统，结构复杂，成本较高，需要10万元左右，且工期长，需要1个月时间。 For the existing 85t boiler, the system mostly uses panel-mounted cabinets (instruments) and DCS control. Boiler interlock and damper control are all realized through panel-mounted cabinets, and DCS can only monitor the main parameters. In recent years, with the gradual increase in safety requirements, thermal power plants require the installation of overpressure and low water level interlock tripping systems. Using the existing interlock tripping system on the market has a complex structure and high cost, requiring about 100,000 yuan, and the construction period is long, requiring one month. the
发明内容 Contents of the invention
为解决现有技术存在的上述缺陷，本实用新型的目的在于提供一种结构简单，安装方便快捷，成本低，稳定可靠的实现联锁跳闸控制的基于PLC控制的锅炉水位压力联锁保护系统。 In order to solve the above-mentioned defects existing in the prior art, the purpose of this utility model is to provide a boiler water level pressure interlocking protection system based on PLC control with simple structure, convenient and fast installation, low cost, stable and reliable realization of interlock trip control. the
本实用新型采用的技术方案是：该基于PLC控制的锅炉水位压力联锁保护系统，具有PLC和SM231模拟量输入模块，RS485连接线实现两者通信，其特征在于：所述PLC的DI接点连接投切开关，DO接点连接控制继电器和报警指示灯，SM231模拟量输入模块的AI接点接入现场模拟量。 The technical scheme adopted by the utility model is: the boiler water level pressure interlocking protection system based on PLC control has PLC and SM231 analog input module, and the RS485 connection line realizes the communication between the two. It is characterized in that: the DI contact of the PLC is connected The switching switch, the DO contact is connected to the control relay and the alarm indicator, and the AI contact of the SM231 analog input module is connected to the field analog. the
所述投切开关包括低水位投入开关、超压投入开关；所述控制继电器包括向空排控制继电器和排粉风机控制继电器，所述向空排控制继电器控制向空汽阀，所述排粉风机控制继电器控制排粉风机；所述现场模拟量包括汽包压力、液位、主汽压力信号；所述报警指示灯与现场模拟量信号相对应。 The switching switch includes a low water level input switch and an overpressure input switch; the control relay includes an empty discharge control relay and a powder discharge fan control relay, the empty discharge control relay controls the air valve, and the powder discharge The fan control relay controls the powder exhaust fan; the on-site analog quantity includes drum pressure, liquid level, and main steam pressure signals; the alarm indicator light corresponds to the on-site analog quantity signal. the
采用上述技术方案的有益效果：该基于PLC控制的锅炉水位压力联锁保护系统，利用PLC的模拟量输入模块采集现场汽包压力、液位、主汽压力信号，通过PLC内部比较模块进行逻辑运算，达到逻辑规定的动作条件时，PLC输出开关量信号控制排粉风机跳闸或打开向空排汽阀，从而实现联锁功能。该系统经生产系统进行试验，能够实现设计中所有联锁跳闸功能，且结构简单，成本低，安装方便快捷，运行平稳可靠，为生产安全平稳运行提供了可靠的保障。 Beneficial effects of adopting the above-mentioned technical scheme: the boiler water level pressure interlocking protection system based on PLC control uses the PLC analog input module to collect on-site steam drum pressure, liquid level, and main steam pressure signals, and performs logic operations through the comparison module inside the PLC , when the action condition stipulated by the logic is reached, the PLC outputs a switch signal to control the powder exhaust fan to trip or open the exhaust valve to the air, thus realizing the interlock function. The system has been tested by the production system and can realize all the interlocking and tripping functions in the design. It has simple structure, low cost, convenient and quick installation, stable and reliable operation, and provides a reliable guarantee for safe and stable production. the
附图说明 Description of drawings
下面结合附图对本实用新型的具体实施例作进一步详细的说明。 Below in conjunction with accompanying drawing, specific embodiment of the utility model is described in further detail. the
图1为本实用新型的结构示意图。 Fig. 1 is the structural representation of the utility model. the
具体实施方式 Detailed ways
如图1所示的基于PLC的锅炉水位压力联锁保护系统，具有S7-200PLC 1和1个SM231模拟量输入模块3，S7-200PLC中的CPU模块选用224XP，含14个DI通道，10个DO通道，每个SM231模块，含4路模拟量输入。所述S7-200PLC和SM231模拟量输入模块采用RS485连接线2实现通信。所述S7-200PLC的DI接点连接低水位投入开关SQ1、超压投入开关SQ2；DO接点连接向空排控制继电器KA1和排粉风机控制继电器KA2，所述向空排控制继电器控制向空汽阀，所述排粉风机控制继电器控制排粉风机；DO接点还连接有与现场模拟量信号相对应的报警指示灯HL1、HL2、HL3、HL4；所述SM231模拟量输入模块的AI接点接入现场汽包压力YB3、左侧水位YB1、右侧水位YB2、主汽压力YB4信号。根据需要控制的设备，采集其模拟量信号，增加SM231模拟量输入模块，可以实现更多通道的联锁控制。
As shown in Figure 1, the PLC-based boiler water level pressure interlock protection system has S7-
利用PLC的模拟量输入模块采集现场汽包压力、液位、主汽压力信号，通过PLC内部比较模块进行逻辑运算，达到逻辑规定的动作条件时，PLC输出开关量信号控制排粉风机跳闸或打开向空排汽阀，从而实现联锁功能。 Use the analog input module of PLC to collect the on-site steam drum pressure, liquid level, and main steam pressure signals, and perform logic operations through the comparison module inside the PLC. When the action conditions specified by the logic are reached, the PLC outputs the switching signal to control the powder discharge fan to trip or open. To empty the exhaust valve, so as to realize the interlock function. the
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220725589.8U CN203115980U (en) | 2012-12-26 | 2012-12-26 | Boiler Water Level Pressure Interlocking Protection System Based on PLC Control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220725589.8U CN203115980U (en) | 2012-12-26 | 2012-12-26 | Boiler Water Level Pressure Interlocking Protection System Based on PLC Control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203115980U true CN203115980U (en) | 2013-08-07 |
Family
ID=48896319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220725589.8U Expired - Fee Related CN203115980U (en) | 2012-12-26 | 2012-12-26 | Boiler Water Level Pressure Interlocking Protection System Based on PLC Control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203115980U (en) |
-
2012
- 2012-12-26 CN CN201220725589.8U patent/CN203115980U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203941436U (en) | The interactive Industrial Boiler safety in a kind of scene and energy efficiency monitoring device | |
| CN104298276A (en) | Internal temperature monitoring device of electrical equipment mechanism | |
| CN203115980U (en) | Boiler Water Level Pressure Interlocking Protection System Based on PLC Control | |
| CN203850099U (en) | Pre-alarm transformer based on transformer oil monitoring | |
| CN201568742U (en) | Heat insulation control device for fire-fighting pipeline in tunnel | |
| CN205208132U (en) | Full -automatic SF6 aerating device | |
| CN203775473U (en) | Power-saving control cabinet of intelligent street lamp | |
| CN204300699U (en) | The control pressurer system of electrified heating device control cabinet | |
| CN204314679U (en) | A kind of fault routing inspection circuit exported for many power sources in parallel | |
| CN205208133U (en) | But wireless control's full -automatic SF6 aerating device | |
| CN204241980U (en) | The anti-overflow cistern of a kind of Household intelligent | |
| CN204190987U (en) | A kind of control cabinet for street lamp | |
| CN202917405U (en) | Circuit breaker having network function | |
| CN103269128B (en) | Intelligent transformer load monitoring method | |
| CN205247175U (en) | Automatic device that diffuses of coal gas | |
| CN207580119U (en) | A kind of naval light control panel peculiar to vessel | |
| CN207487881U (en) | Based on SF6 pressure monitor systems in wireless communication networks GIS | |
| CN206331288U (en) | Garden energy device online monitoring system | |
| CN205068090U (en) | A safety protection relay for unattended substation | |
| CN204781078U (en) | Outdoor type silence network pressure -superposition water supply installation | |
| CN110452721A (en) | Electrical control cabinet of pressure regulating system of carbonization chamber | |
| CN204188679U (en) | A kind of electric power meter for transformer station | |
| CN102082467A (en) | Monitoring device for telemechanical digital channel of transformer substation | |
| CN204269695U (en) | An electric energy metering device for street lamp box transformer | |
| CN201956750U (en) | Device for monitoring telecontrol digital channel of transformer station |
Legal Events
| 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 |
Granted publication date: 20130807 Termination date: 20211226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |