CN202631013U - On-line coal gas flow monitoring system - Google Patents

On-line coal gas flow monitoring system Download PDF

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CN202631013U
CN202631013U CN201220224514.1U CN201220224514U CN202631013U CN 202631013 U CN202631013 U CN 202631013U CN 201220224514 U CN201220224514 U CN 201220224514U CN 202631013 U CN202631013 U CN 202631013U
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transmitter
flow sensor
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gas
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黎瑞荣
庞斌
宁甲宇
洪光明
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Ouya Automation & Equipment Co ltd Liuzhou New & High-Tech Industrial Development Zone
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Ouya Automation & Equipment Co ltd Liuzhou New & High-Tech Industrial Development Zone
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Abstract

本实用新型煤气流量在线监控系统,涉及一种在线监控系统,该系统包括PLC控制系统、工控机、流量传感器、变送器、光电隔离器,PLC控制系统包括CPU模块及分别与CPU模块连接的电源模块、以太网通讯模块、模拟量输入模块,流量传感器安装在要测量的煤气管中,流量传感器的信号输出端与变送器的输入端连接,变送器的输出端与光电隔离器的输入端连接,光电隔离器的输出端与模拟量输入模块连接,工控机与以太网通讯模块连接。本系统具有能及时测量并显示煤气供给系统压力值、工作可靠性与通用性强、扩展能力强等优点。

The utility model relates to an on-line monitoring system for gas flow. The system includes a PLC control system, an industrial computer, a flow sensor, a transmitter, and a photoelectric isolator. The PLC control system includes a CPU module and devices connected to the CPU module respectively. Power supply module, Ethernet communication module, analog input module, the flow sensor is installed in the gas pipe to be measured, the signal output end of the flow sensor is connected to the input end of the transmitter, the output end of the transmitter is connected to the photoelectric isolator The input terminal is connected, the output terminal of the photoelectric isolator is connected with the analog input module, and the industrial computer is connected with the Ethernet communication module. The system has the advantages of being able to measure and display the pressure value of the gas supply system in time, having strong working reliability and versatility, and strong expansion ability.

Description

煤气流量在线监控系统Gas flow online monitoring system

技术领域 technical field

本实用新型涉及一种在线监控系统,特别是一种煤气流量在线监控系统。 The utility model relates to an on-line monitoring system, in particular to an on-line gas flow monitoring system.

背景技术 Background technique

在冶炼工业中,高炉煤气干法除尘后得到的净煤气输出给用户使用,煤气输出量的多少,是影响企业和用户各方经济利益的首要因素,但因为煤气中含有一定量的粉尘和水份,在线实测量的精度是个技术难题。当煤气供给系统出现不稳定时,如不能及时采取有效的控制措施将会导致后续炉顶煤气差压发电TRT系统或热风炉系统不能稳定运行。 In the smelting industry, the clean gas obtained after blast furnace gas dry dedusting is exported to users. The amount of gas output is the primary factor affecting the economic interests of the enterprise and users. However, because the gas contains a certain amount of dust and water The accuracy of online actual measurement is a technical problem. When the gas supply system is unstable, if effective control measures cannot be taken in time, the follow-up furnace top gas differential pressure power generation TRT system or hot blast stove system will not be able to operate stably.

实用新型内容 Utility model content

本实用新型的目的是提供一种能及时测量并显示煤气供给系统压力值、工作可靠性强的煤气流量在线监控系统。 The purpose of the utility model is to provide an on-line gas flow monitoring system capable of timely measuring and displaying the pressure value of the gas supply system and having high working reliability.

本实用新型为实现上述目的采用的技术方案是:一种煤气流量在线监控系统,该系统包括PLC控制系统、工控机、流量传感器、变送器、光电隔离器,PLC控制系统包括CPU模块及分别与CPU模块连接的电源模块、以太网通讯模块、模拟量输入模块,流量传感器安装在要测量的煤气管中,流量传感器的信号输出端与变送器的输入端连接,变送器的输出端与光电隔离器的输入端连接,光电隔离器的输出端与模拟量输入模块连接,工控机与以太网通讯模块连接。 The technical scheme adopted by the utility model for achieving the above purpose is: an on-line gas flow monitoring system, the system includes a PLC control system, an industrial computer, a flow sensor, a transmitter, a photoelectric isolator, and the PLC control system includes a CPU module and respectively The power module, Ethernet communication module, and analog input module connected to the CPU module, the flow sensor is installed in the gas pipe to be measured, the signal output end of the flow sensor is connected to the input end of the transmitter, and the output end of the transmitter It is connected with the input terminal of the photoelectric isolator, the output terminal of the photoelectric isolator is connected with the analog input module, and the industrial computer is connected with the Ethernet communication module.

其中所述系统设有n个流量传感器、n个变送器、n个光电隔离器,n为大于1的自然数,n个流量传感器分别安装在同一煤气管中不同位置或同一输送系统不同的煤气管中,流量传感器n的信号输出端与变送器n的输入端连接,变送器n的输出端与光电隔离器n的输入端连接,n个光电隔离器的输出端分别与模拟量输入模块连接。 Among them, the system is equipped with n flow sensors, n transmitters, and n photoelectric isolators, n is a natural number greater than 1, and n flow sensors are respectively installed in different positions in the same gas pipe or at different gas sources in the same delivery system. In the pipe, the signal output end of the flow sensor n is connected to the input end of the transmitter n, the output end of the transmitter n is connected to the input end of the photoelectric isolator n, and the output ends of the n photoelectric isolators are respectively connected to the analog input module connection.

其中所述模拟量输入模块为8路12位4-20mA 2线制 模拟量输入模块。 Wherein the analog input module is an 8-way 12-bit 4-20mA 2-wire analog input module.

其中所述电源模块为DC24V直流电源模块。 Wherein the power supply module is a DC24V direct current power supply module.

由于采用了上述方案,本实用新型与现有其它同类技术相比较具有如下有益效果: Due to the adoption of the above scheme, the utility model has the following beneficial effects compared with other existing similar technologies:

1、能及时测量并显示煤气供给系统压力值 1. It can measure and display the pressure value of the gas supply system in time

本实用新型煤气流量在线监控系统由于在煤气管中安装有流量传感器,流量传感器分别安装在同一煤气管中不同位置或同一输送系统不同的煤气管中,流量传感器能测出煤气管道中的差压信号,变送器将差压信号转换成电流信号,再将电流信号通过光电隔离器及模拟量输入模块传输给CPU模块,CPU模块计数分析后通过以太网通讯模块将压力值显示在工控机监视面板上,在系统中设置正常压力值,只要检测的压力值超出正常压力值,即可通过与本实用新型煤气流量在线监控系统配套的控制系统对煤气供给系统采取控制措施。 The gas flow online monitoring system of the utility model has flow sensors installed in the gas pipes, and the flow sensors are respectively installed in different positions in the same gas pipe or in different gas pipes in the same delivery system, and the flow sensors can measure the differential pressure in the gas pipes signal, the transmitter converts the differential pressure signal into a current signal, and then transmits the current signal to the CPU module through the photoelectric isolator and the analog input module. After counting and analyzing the CPU module, the pressure value is displayed on the industrial computer monitor through the Ethernet communication module On the panel, set the normal pressure value in the system, as long as the detected pressure value exceeds the normal pressure value, the gas supply system can be controlled by the control system matched with the gas flow online monitoring system of the utility model.

2、工作可靠性与通用性强 2. Strong work reliability and versatility

本实用新型煤气流量在线监控系统硬件部分模块化,变送器将差压信号转换成电流信号,通过光电隔离器传输给模拟量输入模块,使输入与输出绝缘隔离,信号单向传输,无反馈影响,抗干扰性强,响应速度快,在现场工作可靠性与通用性强,友好的编程环境让人可以在最短的时间内完成比较繁琐的任务编程且可以很容易的修改程序,特别便于上手。 The hardware part of the gas flow online monitoring system of the utility model is modularized. The transmitter converts the differential pressure signal into a current signal, and transmits it to the analog input module through a photoelectric isolator, so that the input and output are insulated and isolated, and the signal is transmitted in one direction without feedback. Impact, strong anti-interference, fast response, strong reliability and versatility in field work, friendly programming environment allows people to complete tedious task programming in the shortest time and can easily modify the program, especially easy to use .

3、扩展能力强 3. Strong expansion ability

如果要实现什么其它的功能只需增加输入模块和在工控机的组态界面,并在原来程序基础上添加扩展功能的程序段即可。 If you want to realize any other functions, you only need to add the input module and the configuration interface in the industrial computer, and add the program segment of the extended function on the basis of the original program.

下面结合附图和实施例对本实用新型煤气流量在线监控系统作进一步说明。 The gas flow on-line monitoring system of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

附图说明 Description of drawings

图1是本实用新型煤气流量在线监控系统的结构方框图。 Fig. 1 is a structural block diagram of the utility model gas flow online monitoring system.

具体实施方式 Detailed ways

如图1所示,本实用新型煤气流量在线监控系统,该系统包括PLC控制系统、工控机、流量传感器、变送器、光电隔离器。PLC控制系统1包括CPU模块及分别与CPU模块连接的电源模块、以太网通讯模块、模拟量输入模块。流量传感器和变送器安装在要测量的煤气管中,流量传感器的信号输出端与变送器的输入端连接,变送器的输出端与光电隔离器的输入端连接,光电隔离器的输出端与模拟量输入模块连接。工控机通过以太网网线与以太网通讯模块连接。 As shown in Figure 1, the gas flow online monitoring system of the utility model includes a PLC control system, an industrial computer, a flow sensor, a transmitter, and a photoelectric isolator. The PLC control system 1 includes a CPU module, a power supply module connected to the CPU module, an Ethernet communication module, and an analog input module. The flow sensor and transmitter are installed in the gas pipe to be measured, the signal output of the flow sensor is connected to the input of the transmitter, the output of the transmitter is connected to the input of the photoelectric isolator, and the output of the photoelectric isolator The terminal is connected to the analog input module. The industrial computer is connected to the Ethernet communication module through the Ethernet network cable.

本系统中设有n个流量传感器、n个变送器、n个光电隔离器(图中仅示出3第1、2及n组),n为大于1的自然数(n为监测点数量),n个流量传感器分别安装在同一煤气管中不同位置或同一输送系统不同的煤气管中。如图中所示,流量传感器1的信号输出端与变送器1的输入端连接,变送器1的输出端与光电隔离器1的输入端连接,流量传感器2的信号输出端与变送器2的输入端连接,变送器2的输出端与光电隔离器2的输入端连接,流量传感器3的信号输出端与变送器3的输入端连接,流量传感器n的信号输出端与变送器n的输入端连接,变送器n的输出端与光电隔离器n的输入端连接,n个光电隔离器的输出端分别与模拟量输入模块连接。当然,若n值较大,模拟量输入模块接口不够用时可以设置多块模拟量输入模块,此时多块模拟量输入模块同时与CPU模块连接。 There are n flow sensors, n transmitters and n photoelectric isolators in this system (only 3 groups 1, 2 and n are shown in the figure), and n is a natural number greater than 1 (n is the number of monitoring points) , n flow sensors are respectively installed in different positions in the same gas pipe or in different gas pipes in the same delivery system. As shown in the figure, the signal output terminal of the flow sensor 1 is connected to the input terminal of the transmitter 1, the output terminal of the transmitter 1 is connected to the input terminal of the photoelectric isolator 1, and the signal output terminal of the flow sensor 2 is connected to the transmitter The input terminal of transmitter 2 is connected, the output terminal of transmitter 2 is connected with the input terminal of photoelectric isolator 2, the signal output terminal of flow sensor 3 is connected with the input terminal of transmitter 3, and the signal output terminal of flow sensor n is connected with the transformer The input terminal of transmitter n is connected, the output terminal of transmitter n is connected with the input terminal of photoelectric isolator n, and the output terminals of n photoelectric isolators are respectively connected with the analog input module. Of course, if the value of n is large and the interface of the analog input module is not enough, multiple analog input modules can be installed. At this time, multiple analog input modules are connected to the CPU module at the same time.

所述模拟量输入模块为8路12位4-20mA 2线制 模拟量输入模块,变送器为2线制4-20mA变送器,变送器通过2芯电缆与模拟量输入模块的1路模拟量输入通道端子(图中未示出)连接。PLC控制系统1的CPU模块、电源模块、以太网通讯模块、模拟量输入模块分别设置在PLC背板上,且上述各模块通过PLC背板相连直接相连。电源模块为DC24V直流电源模块,PLC控制系统1内部所有模块由DC24V直流电源模块通过PLC背板供电。 The analog input module is an 8-way 12-bit 4-20mA 2-wire analog input module, the transmitter is a 2-wire 4-20mA transmitter, and the transmitter is connected to 1 of the analog input module through a 2-core cable. Connect to an analog input channel terminal (not shown in the figure). The CPU module, power supply module, Ethernet communication module, and analog input module of the PLC control system 1 are respectively arranged on the PLC backplane, and the above-mentioned modules are directly connected through the PLC backplane. The power supply module is a DC24V direct current power supply module, and all modules inside the PLC control system 1 are powered by the DC24V direct current power supply module through the PLC backplane.

测量原理:流量计是一种插入式流量测量仪表,在管道中插入一根流量传感器,当流体流过流量传感器时,在其前部迎流方向产生一个高压分布区,在其后部产生一个低压分布区。流量传感器在高、低压区有按一定规则排列的多对取压孔(一般为三对),分别测量流体的全压力,包括平均速度压力 Pl和静压力P2。将 P1和P2分别引入变送器,测量出差压 △P=P1-P2,△P反映流体平均速度的大小,以此可推算出流体的流量。插入箱体出口管道中的流量传感器及时检测到差压值并输出到变送器。差压在控制范围外,则可能出现含尘量超标等反常情况。 Measuring principle: The flowmeter is a plug-in flow measuring instrument. A flow sensor is inserted into the pipeline. When the fluid flows through the flow sensor, a high-pressure distribution area is generated in the upstream direction of the front of the flow sensor, and a high-pressure distribution area is generated in the rear of the flow sensor. Low pressure distribution area. The flow sensor has multiple pairs of pressure-taking holes (generally three pairs) arranged in certain rules in the high and low pressure areas, respectively measuring the total pressure of the fluid, including the average velocity pressure P1 and static pressure P2. Introduce P1 and P2 into the transmitter respectively, and measure the differential pressure △P=P1-P2, △P reflects the average velocity of the fluid, so the flow rate of the fluid can be calculated. The flow sensor inserted into the outlet pipe of the box body detects the differential pressure value in time and outputs it to the transmitter. If the differential pressure is outside the control range, there may be abnormal conditions such as excessive dust content.

工作时,流量传感器将现场煤气流量转换为差压信号,可根据现场监测点的增加,增加流量传感器、变送器及光电隔离器的数量;变送器将流量传感器检测到的差压信号转换为标准的4-20mA电流信号;光电隔离器的作用是传送电信号,使输入与输出绝缘隔离,信号单向传输,无反馈影响,抗干扰性强,响应速度快;PLC控制系统1对现场传送过来的电信号通过事先编写好的程序进行周期性运算,得到操作员能直接看的懂得含尘量数值,并最终通过工控机的监视面板以数值或棒图等格式显示,在系统中设置正常压力值(可通过软件设置),只要检测的压力值超出正常压力值(可能出现含尘量超标等反常情况),即可通过与本实用新型煤气流量在线监控系统配套的控制系统(控制系统不是本实用新型的发明点,在此不做详细描述)对煤气供给系统采取控制措施。当然,我们也可以根据需要在显示屏中显示含尘量实时曲线,并可以打印报表等。当监测点出现含尘量超标等反常情况时,此时,系统也有声光报警,便于操作员及时采取必要措施。 When working, the flow sensor converts the on-site gas flow into a differential pressure signal, and the number of flow sensors, transmitters and photoelectric isolators can be increased according to the increase of on-site monitoring points; the transmitter converts the differential pressure signal detected by the flow sensor It is a standard 4-20mA current signal; the function of the photoelectric isolator is to transmit electrical signals, so that the input and output are isolated, the signal is transmitted in one direction, there is no feedback effect, the anti-interference is strong, and the response speed is fast; the PLC control system 1 is on-site The transmitted electrical signal is periodically calculated through the pre-written program, and the dust content value that the operator can directly see is obtained, and finally displayed in the format of numerical value or bar graph through the monitoring panel of the industrial computer, and set in the system Normal pressure value (can be set by software), as long as the detected pressure value exceeds the normal pressure value (abnormal situations such as excessive dust content may occur), the control system (control system) matched with the gas flow online monitoring system of the utility model can It is not the invention point of the present utility model, and will not be described in detail here) Take control measures for the gas supply system. Of course, we can also display the real-time curve of dust content on the display screen as needed, and can print reports and so on. When abnormal conditions such as dust content exceeding the standard appear at the monitoring point, the system also has an audible and visual alarm at this time, which is convenient for the operator to take necessary measures in time.

Claims (4)

1.一种煤气流量在线监控系统,其特征在于,该系统包括PLC控制系统、工控机、流量传感器、变送器、光电隔离器,PLC控制系统包括CPU模块及分别与CPU模块连接的电源模块、以太网通讯模块、模拟量输入模块,流量传感器安装在要测量的煤气管中,流量传感器的信号输出端与变送器的输入端连接,变送器的输出端与光电隔离器的输入端连接,光电隔离器的输出端与模拟量输入模块连接,工控机与以太网通讯模块连接。 1. A gas flow online monitoring system is characterized in that the system includes a PLC control system, an industrial computer, a flow sensor, a transmitter, a photoelectric isolator, and the PLC control system includes a CPU module and a power supply module connected to the CPU module respectively , Ethernet communication module, analog input module, the flow sensor is installed in the gas pipe to be measured, the signal output end of the flow sensor is connected to the input end of the transmitter, and the output end of the transmitter is connected to the input end of the photoelectric isolator Connection, the output terminal of the photoelectric isolator is connected with the analog input module, and the industrial computer is connected with the Ethernet communication module. 2.如权利要求1所述的煤气流量在线监控系统,其特征在于,所述系统设有n个流量传感器、n个变送器、n个光电隔离器,n为大于1的自然数,n个流量传感器分别安装在同一煤气管中不同位置或同一输送系统不同的煤气管中,流量传感器n的信号输出端与变送器n的输入端连接,变送器n的输出端与光电隔离器n的输入端连接,n个光电隔离器的输出端分别与模拟量输入模块连接。 2. The gas flow online monitoring system as claimed in claim 1, wherein said system is provided with n flow sensors, n transmitters, n photoelectric isolators, n is a natural number greater than 1, n The flow sensors are respectively installed in different positions in the same gas pipe or in different gas pipes of the same delivery system. The signal output end of the flow sensor n is connected to the input end of the transmitter n, and the output end of the transmitter n is connected to the photoelectric isolator n The input terminals of n photoelectric isolators are respectively connected to the analog input modules. 3.如权利要求1所述的煤气流量在线监控系统,其特征在于,所述模拟量输入模块为8路12位4-20mA 2线制 模拟量输入模块。 3. The gas flow online monitoring system as claimed in claim 1, wherein said analog input module is an 8-way 12-bit 4-20mA 2-wire analog input module. 4.如权利要求1所述的煤气流量在线监控系统,其特征在于,所述电源模块为DC24V直流电源模块。 4. The gas flow online monitoring system according to claim 1, wherein the power supply module is a DC24V direct current power supply module.
CN201220224514.1U 2012-05-18 2012-05-18 On-line coal gas flow monitoring system Expired - Lifetime CN202631013U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103866069A (en) * 2014-03-20 2014-06-18 莱芜钢铁集团有限公司 Centralized online monitoring system of multiple blast furnaces coal gas environment and control method thereof
CN109406720A (en) * 2018-09-19 2019-03-01 淮北矿业股份有限公司 A kind of long-range monitoring coke oven on-line checking data
CN111351560A (en) * 2020-03-27 2020-06-30 江苏联峰实业有限公司 A load cell online detection device
CN113252099A (en) * 2021-06-15 2021-08-13 阳春新钢铁有限责任公司 Automatic detection loop system for optimizing primary meter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103866069A (en) * 2014-03-20 2014-06-18 莱芜钢铁集团有限公司 Centralized online monitoring system of multiple blast furnaces coal gas environment and control method thereof
CN109406720A (en) * 2018-09-19 2019-03-01 淮北矿业股份有限公司 A kind of long-range monitoring coke oven on-line checking data
CN111351560A (en) * 2020-03-27 2020-06-30 江苏联峰实业有限公司 A load cell online detection device
CN113252099A (en) * 2021-06-15 2021-08-13 阳春新钢铁有限责任公司 Automatic detection loop system for optimizing primary meter

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