CN114689812A - Automatic checking and calibrating system and method for online chemical instrument - Google Patents

Automatic checking and calibrating system and method for online chemical instrument Download PDF

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CN114689812A
CN114689812A CN202210302857.3A CN202210302857A CN114689812A CN 114689812 A CN114689812 A CN 114689812A CN 202210302857 A CN202210302857 A CN 202210302857A CN 114689812 A CN114689812 A CN 114689812A
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meter
transmitter
chemical instrument
online chemical
opening
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刘玮
孙祥飞
潘珺
黄茜
李晶
文俊朋
熊卫军
张卫东
张玉国
黄雪亮
刘海杰
刘继峰
姚波
汪昆
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Xian Thermal Power Research Institute Co Ltd
Huaneng Wuhan Power Generation Co Ltd
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Xian Thermal Power Research Institute Co Ltd
Huaneng Wuhan Power Generation Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G—PHYSICS
    • G01—MEASURING; TESTING
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    • G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references

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Abstract

本发明公开了一种在线化学仪表自动检验校准系统及方法，包括进水管道、标准溶液输入管道、三通电磁阀、被检在线化学仪表传感器、被检在线化学仪表变送器、控制系统、标准表及电磁阀；进水管道的出口分为两路，其中一路与三通电磁阀的第一个开口相连通，另一路经电磁阀与标准表相连通，标准溶液输入管道与三通电磁阀的第二个开口相连通，三通电磁阀的第三个开口与被检在线化学仪表传感器的入口相连通，被检在线化学仪表传感器与被检在线化学仪表变送器相连接，控制系统与被检在线化学仪表变送器、标准表、三通电磁阀及电磁阀相连接，该系统及方法能够准确、可靠的对在线化学仪表进行在线校验及校准。

Figure 202210302857

The invention discloses an online chemical instrument automatic inspection and calibration system and method, comprising a water inlet pipeline, a standard solution input pipeline, a three-way solenoid valve, a detected online chemical instrument sensor, a detected online chemical instrument transmitter, a control system, Standard meter and solenoid valve; the outlet of the water inlet pipeline is divided into two paths, one of which is connected with the first opening of the three-way solenoid valve, the other is connected with the standard meter through the solenoid valve, and the standard solution input pipeline is connected with the three-way solenoid valve. The second opening of the valve is connected, the third opening of the three-way solenoid valve is connected with the inlet of the detected online chemical instrument sensor, the detected online chemical instrument sensor is connected with the detected online chemical instrument transmitter, and the control system Connected with the tested online chemical instrument transmitter, standard meter, three-way solenoid valve and solenoid valve, the system and method can accurately and reliably perform online verification and calibration of the online chemical instrument.

Figure 202210302857

Description

Automatic checking and calibrating system and method for online chemical instrument
Technical Field
The invention belongs to the technical field of monitoring of water vapor quality of a power plant, and relates to an on-line automatic testing and calibrating system and method for a chemical instrument.
Background
The steam quality of the power plant is effectively controlled by continuously and accurately monitoring the steam quality by means of the online chemical instrument, the technical key of preventing thermal equipment from being corroded, scaled and salted is realized, and the important influence on the safety production, energy conservation and consumption reduction of the power plant is realized. In order to ensure the accuracy and reliability of the measurement of the on-line chemical instrument, the calibration needs to be checked regularly.
The measurement error of the on-line chemical instrument is mainly caused by the influence of pure water factors and on-line factors, which only appear during the on-line measurement of the instrument, when a sensor (or an electrode) of the instrument is taken out of a measurement flow cell and placed in a standard solution for off-line inspection or calibration, because the influence of the pure water factors and the on-line factors is removed, the accurate on-line chemical instrument for off-line inspection by the standard solution cannot ensure the accuracy during the on-line measurement. Therefore, the current on-line chemical instrument inspection and calibration mainly has the following problems:
1) the meter is sent to a measurement yard for testing. After the electrode is detached by a measuring hospital, a standard solution is used for testing, or a standard measuring instrument is used for testing a transmitter (a secondary instrument), and the testing method cannot ensure accurate online measurement after the testing is qualified.
2) The off-line test was performed using standard solutions. The measurement accuracy of the online chemical instrument is tested by adopting the standard solution offline, and the online chemical instrument which is inaccurate under the actual measurement condition cannot be found due to the fact that the test condition is inconsistent with the actual measurement condition and the influence of pure water factors and online factors is eliminated. That is, the standard solution is used to test the accurate on-line chemical instrument, and the actual on-line measurement is not necessarily accurate.
3) And (5) carrying out online comparison and inspection by adopting standard inspection device equipment. Although the method can meet the requirement that the online chemical instrument inspection must be carried out, the inspection operation needs to be carried out manually and periodically, the automation cannot be realized, about fifty online chemical instruments exist in one unit, and the manual inspection workload is very large. More importantly, when the standard inspection device is used for online comparison inspection, the inspection result has uncertainty errors due to the limitation of the technical level and the operation proficiency of field maintenance personnel.
In summary, various standards require online inspection and calibration of an online chemical instrument, and at present, there is no online chemical instrument automatic inspection and calibration method and system suitable for field use, high accuracy and reliability, and no need of manual intervention, and the problem needs to be solved urgently.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an on-line chemical instrument automatic checking and calibrating system and method, which can accurately and reliably carry out on-line checking and calibrating on-line chemical instruments.
In order to achieve the aim, the automatic detection and calibration system for the online chemical instrument comprises a water inlet pipeline, a standard solution input pipeline, a three-way electromagnetic valve, a detected online chemical instrument sensor, a detected online chemical instrument transmitter, a control system, a standard meter and an electromagnetic valve;
the outlet of the water inlet pipeline is divided into two paths, wherein one path is communicated with a first opening of the three-way electromagnetic valve, the other path is communicated with the standard meter through the electromagnetic valve, the standard solution input pipeline is communicated with a second opening of the three-way electromagnetic valve, a third opening of the three-way electromagnetic valve is communicated with the inlet of the detected on-line chemical instrument sensor, the detected on-line chemical instrument sensor is connected with the detected on-line chemical instrument transmitter, and the control system is connected with the detected on-line chemical instrument transmitter, the standard meter, the three-way electromagnetic valve and the electromagnetic valve.
The detected on-line chemical instrument sensor is a conductivity meter sensor, a hydrogen conductivity meter sensor, a pH meter sensor, a dissolved oxygen meter sensor, a sodium meter sensor, a silicon meter sensor, a TOC meter sensor, a TOCi meter sensor, an iron meter sensor, a phosphorus meter sensor, a chlorine meter sensor, an ORP meter sensor, a hydrazine meter sensor, a densimeter sensor, a turbidity meter sensor or an SDI meter sensor.
The detected on-line chemical meter transmitter is a conductivity meter transmitter, a hydrogen conductivity meter transmitter, a pH meter transmitter, a dissolved oxygen meter transmitter, a sodium meter transmitter, a silicon meter transmitter, a TOC meter transmitter, a TOCi meter transmitter, an iron meter transmitter, a phosphorus meter transmitter, a chlorine meter transmitter, an ORP meter transmitter, an hydrazine meter transmitter, a densimeter transmitter, a turbidity meter transmitter or an SDI meter transmitter.
Under the normal measurement state, the control system controls the conduction between the first opening and the third opening of the three-way electromagnetic valve, the disconnection between the second opening and the third opening, the electromagnetic valve is closed, water output by the water inlet pipeline enters the detected on-line chemical instrument sensor through the three-way electromagnetic valve, and the detected on-line chemical instrument transmitter displays measurement data.
The automatic inspection method of the online chemical instrument comprises the following steps:
the control system controls the three-way electromagnetic valve to be communicated between the first opening and the third opening, the second opening and the third opening are disconnected, the water output by the water inlet pipeline is divided into two paths, one path enters the detected on-line chemical instrument sensor, the other path enters the standard meter, the detected on-line chemical instrument transmitter and the standard meter display the measured values, the control system respectively reads the measured values of the detected on-line chemical instrument transmitter and the standard meter, and the error calculation of the detected on-line chemical instrument is carried out according to the measured values of the detected on-line chemical instrument transmitter and the standard meter, so that the detection of the detected on-line chemical instrument is completed.
The automatic inspection method of the online chemical instrument comprises the following steps:
the control system controls the conduction between the second opening and the third opening in the three-way electromagnetic valve, the disconnection between the first opening and the third opening, the electromagnetic valve is closed, the standard solution enters the detected on-line chemical instrument sensor through the three-way electromagnetic valve, the detected on-line chemical instrument transmitter displays the measured value, the control system reads the measured value of the detected on-line chemical instrument transmitter, the error calculation of the detected on-line chemical instrument is carried out by using the parameter value of the standard solution and the measured value of the detected on-line chemical instrument transmitter, and the detection of the detected on-line chemical instrument is completed.
The automatic calibration method of the online chemical instrument comprises the following steps:
the control system controls the three-way electromagnetic valve to be communicated between the first opening and the third opening, the second opening and the third opening are closed, the electromagnetic valve is opened, water output by the water inlet pipeline is divided into two paths, one path of water enters the detected on-line chemical instrument sensor through the three-way electromagnetic valve, the other path of water enters the standard meter through the electromagnetic valve, the detected on-line chemical instrument transmitter and the standard meter carry out measurement data display, the control system respectively reads the measured values of the detected on-line chemical instrument transmitter and the standard meter, the measured value of the detected on-line chemical instrument transmitter is automatically calibrated to be the measured value of the standard meter, and calibration of the detected on-line chemical instrument is completed.
The automatic calibration method of the online chemical instrument comprises the following steps:
and the control system controls the conduction between the second opening and the third opening in the three-way electromagnetic valve, the disconnection between the first opening and the third opening, the electromagnetic valve is closed, the standard solution enters the detected online chemical instrument sensor through the three-way electromagnetic valve, the detected online chemical instrument transmitter displays the measured data, the control system reads the measured value of the detected online chemical instrument transmitter, the measured value of the detected online chemical instrument transmitter is automatically calibrated to the corresponding parameter value of the standard solution, and the calibration of the detected online chemical instrument is completed.
The invention has the following beneficial effects:
the system and the method for automatically checking and calibrating the on-line chemical instrument realize the switching of the standard solution and the inlet water by utilizing the three-way electromagnetic valve during the specific operation, meanwhile, the standard solution or the standard meter is used for checking and calibrating the detected online chemical instrument, the problems and the defects of the existing methods of checking in a measuring institute, checking the standard solution offline, performing online comparison and checking by adopting standard checking equipment and the like are solved, the automatic online checking and calibrating of the detected online chemical instrument can be realized completely according to the standard requirements, the method is more suitable for field use, does not need manual intervention, and has the advantages of automation, intellectualization and the like, the measurement accuracy of the online chemical instrument is greatly improved, the water quality supervision is ensured to be accurate and effective, the running cost of a power plant is greatly reduced, and a new method and a new thought are provided for the construction of an intelligent power station for accurately monitoring the water vapor quality.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a three-way electromagnetic valve, 2 is a sensor of a detected online chemical instrument, 3 is a transmitter of the detected online chemical instrument, 4 is an electromagnetic valve, 5 is a standard meter, and 6 is a control system.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of the various regions, layers and their relative sizes, positional relationships are shown in the drawings as examples only, and in practice deviations due to manufacturing tolerances or technical limitations are possible, and a person skilled in the art may additionally design regions/layers with different shapes, sizes, relative positions, according to the actual needs.
Referring to fig. 1, the method and system for automatically checking and calibrating an online chemical meter according to the present invention includes a three-way solenoid valve 1, a sensor 2 of the checked online chemical meter, a transmitter 3 of the checked online chemical meter, a control system 6, a standard meter 5, and a solenoid valve 4;
the outlet of the water inlet pipeline is divided into two paths, wherein one path is communicated with a first opening of the three-way electromagnetic valve 1, the other path is communicated with a standard meter 5 through an electromagnetic valve 4, the standard solution input pipeline is communicated with a second opening of the three-way electromagnetic valve 1, a third opening of the three-way electromagnetic valve 1 is communicated with the inlet of the detected online chemical instrument sensor 2, the detected online chemical instrument sensor 2 is connected with the detected online chemical instrument transmitter 3, and the control system 6 is connected with the detected online chemical instrument transmitter 3, the standard meter 5, the three-way electromagnetic valve 1 and the electromagnetic valve 4.
The detected on-line chemical instrument sensor 2 is a conductivity meter sensor, a hydrogen conductivity meter sensor, a pH meter sensor, a dissolved oxygen meter sensor, a sodium meter sensor, a silicon meter sensor, a TOC meter sensor, a TOCi meter sensor, an iron meter sensor, a phosphorus meter sensor, a chlorine meter sensor, an ORP meter sensor, a hydrazine meter sensor, a densimeter sensor, a turbidity meter sensor or an SDI meter sensor.
The detected on-line chemical meter transmitter 3 is a conductivity meter transmitter, a hydrogen conductivity meter transmitter, a pH meter transmitter, a dissolved oxygen meter transmitter, a sodium meter transmitter, a silicon meter transmitter, a TOC meter transmitter, a TOCi meter transmitter, an iron meter transmitter, a phosphorus meter transmitter, a chlorine meter transmitter, an ORP meter transmitter, an hydrazine meter transmitter, a densimeter transmitter, a turbidity meter transmitter or an SDI meter transmitter.
Under the normal measurement state, the control system 6 controls the three-way electromagnetic valve 1 to open between the first opening and the third opening, the second opening and the third opening to close, the electromagnetic valve 4 is closed, water output by the water inlet pipeline enters the detected on-line chemical instrument sensor 2 through the three-way electromagnetic valve 1, and the detected on-line chemical instrument transmitter 3 displays the measurement data.
The automatic inspection is divided into two modes, namely a standard table comparison inspection method and a standard solution comparison inspection method.
The specific process of the standard table comparison test method is as follows: in a test state, the control system 6 controls the three-way electromagnetic valve 1 to be communicated between the first opening and the third opening, the second opening and the third opening are disconnected, the water output by the water inlet pipeline is divided into two paths, one path of water enters the tested on-line chemical instrument sensor 2, the other path of water enters the standard meter 5, the tested on-line chemical instrument transmitter 3 and the standard meter 5 display the measured values, the control system 6 respectively reads the measured values of the tested on-line chemical instrument transmitter 3 and the standard meter 5, and error calculation of the tested on-line chemical instrument is carried out according to the measured values of the tested on-line chemical instrument transmitter 3 and the standard meter 5, so that the test of the tested on-line chemical instrument is completed.
The specific process of the standard solution comparison test method is as follows: in a test state, the control system 6 controls the conduction between the second opening and the third opening in the three-way electromagnetic valve 1, the disconnection between the first opening and the third opening, the electromagnetic valve 4 is closed, the standard solution enters the tested online chemical instrument sensor 2 through the three-way electromagnetic valve 1, the tested online chemical instrument transmitter 3 displays the measured value, the control system 6 reads the measured value of the tested online chemical instrument transmitter 3, and error calculation of the tested online chemical instrument is carried out by using the parameter value of the standard solution and the measured value of the tested online chemical instrument transmitter 3, so that the test of the tested online chemical instrument is completed.
The automatic calibration is divided into two modes, namely a standard table 5 calibration method and a standard solution calibration method;
standard table 5 the specific procedure of the calibration method is: in a calibration state, the control system 6 controls the three-way electromagnetic valve 1 to be communicated between the first opening and the third opening, the second opening and the third opening are closed, the electromagnetic valve 4 is opened, the water output by the water inlet pipeline is divided into two paths, one path of the water enters the detected online chemical instrument sensor 2 through the three-way electromagnetic valve 1, the other path of the water enters the standard meter 5 through the electromagnetic valve 4, the detected online chemical instrument transmitter 3 and the standard meter 5 perform measurement data display, the control system 6 respectively reads the measurement values of the detected online chemical instrument transmitter 3 and the standard meter 5, the measurement value of the detected online chemical instrument transmitter 3 is automatically calibrated to be the measurement value of the standard meter 5, and the calibration of the detected online chemical instrument is completed.
The specific process of the standard solution calibration method is as follows: in a calibration state, the control system 6 controls the conduction between the second opening and the third opening in the three-way electromagnetic valve 1, the disconnection between the first opening and the third opening, the electromagnetic valve 4 is closed, the standard solution enters the detected online chemical instrument sensor 2 through the three-way electromagnetic valve 1, the detected online chemical instrument transmitter 3 carries out measurement data display, the control system 6 reads the measurement value of the detected online chemical instrument transmitter 3, the measurement value of the detected online chemical instrument transmitter 3 is automatically calibrated to be the corresponding parameter value of the standard solution, and the calibration of the detected online chemical instrument is completed.
The intelligent water quality monitoring system is more suitable for field use, does not need manual intervention, has the advantages of automation, intelligence and the like, greatly improves the accuracy of measurement of an online chemical instrument, ensures the accuracy and effectiveness of water quality supervision, greatly solves the operating cost of a power plant, and provides a new method and a new idea for the construction of an intelligent power station to accurately monitor the water vapor quality.

Claims (8)

1.一种在线化学仪表自动检验校准系统，其特征在于，包括进水管道、标准溶液输入管道、三通电磁阀(1)、被检在线化学仪表传感器(2)、被检在线化学仪表变送器(3)、控制系统(6)、标准表(5)及电磁阀(4)；1. An on-line chemical instrument automatic inspection and calibration system is characterized in that, comprising a water inlet pipeline, a standard solution input pipeline, a three-way solenoid valve (1), a detected on-line chemical instrument sensor (2), a detected on-line chemical instrument variable transmitter (3), control system (6), standard meter (5) and solenoid valve (4); 进水管道的出口分为两路，其中一路与三通电磁阀(1)的第一个开口相连通，另一路经电磁阀(4)与标准表(5)相连通，标准溶液输入管道与三通电磁阀(1)的第二个开口相连通，三通电磁阀(1)的第三个开口与被检在线化学仪表传感器(2)的入口相连通，被检在线化学仪表传感器(2)与被检在线化学仪表变送器(3)相连接，控制系统(6)与被检在线化学仪表变送器(3)、标准表(5)、三通电磁阀(1)及电磁阀(4)相连接。The outlet of the water inlet pipe is divided into two paths, one of which is connected to the first opening of the three-way solenoid valve (1), the other is connected to the standard meter (5) via the solenoid valve (4), and the standard solution input pipe is connected to the standard meter (5). The second opening of the three-way solenoid valve (1) is connected, and the third opening of the three-way solenoid valve (1) is connected with the inlet of the detected online chemical instrument sensor (2), and the detected online chemical instrument sensor (2) ) is connected with the tested online chemical instrument transmitter (3), and the control system (6) is connected with the tested online chemical instrument transmitter (3), standard meter (5), three-way solenoid valve (1) and solenoid valve (4) Connected. 2.根据权利要求1所述的在线化学仪表自动检验校准系统，其特征在于，所述被检在线化学仪表传感器(2)为电导率表传感器、氢电导率表传感器、pH表传感器、溶解氧表传感器、钠表传感器、硅表传感器、TOC表传感器、TOCi表传感器、铁表传感器、磷表传感器、氯表传感器、ORP表传感器、联氨表传感器、密度计传感器、浊度仪传感器或SDI表传感器。2. The online chemical meter automatic inspection and calibration system according to claim 1, wherein the detected online chemical meter sensor (2) is a conductivity meter sensor, a hydrogen conductivity meter sensor, a pH meter sensor, a dissolved oxygen meter Meter Sensor, Sodium Meter Sensor, Silicon Meter Sensor, TOC Meter Sensor, TOCi Meter Sensor, Iron Meter Sensor, Phosphorus Meter Sensor, Chlorine Meter Sensor, ORP Meter Sensor, Hydrazine Meter Sensor, Density Meter Sensor, Turbidity Meter Sensor or SDI table sensor. 3.根据权利要求1所述的在线化学仪表自动检验校准系统，其特征在于，所述被检在线化学仪表变送器(3)为电导率表变送器、氢电导率表变送器、pH表变送器、溶解氧表变送器、钠表变送器、硅表变送器、TOC表变送器、TOCi表变送器、铁表变送器、磷表变送器、氯表变送器、ORP表变送器、联氨表变送器、密度计变送器、浊度仪变送器或SDI表变送器。3. online chemical instrument automatic inspection and calibration system according to claim 1, is characterized in that, described tested online chemical instrument transmitter (3) is conductivity meter transmitter, hydrogen conductivity meter transmitter, pH meter transmitter, dissolved oxygen meter transmitter, sodium meter transmitter, silicon meter transmitter, TOC meter transmitter, TOCi meter transmitter, iron meter transmitter, phosphorus meter transmitter, chlorine meter transmitter meter transmitter, ORP meter transmitter, hydrazine meter transmitter, density meter transmitter, turbidity meter transmitter or SDI meter transmitter. 4.根据权利要求1所述的在线化学仪表自动检验校准系统，其特征在于，正常测量状态下，控制系统(6)控制三通电磁阀(1)的第一开口至第三开口之间导通，第二开口至第三开口之间断开，电磁阀(4)关闭，进水管道输出的水经三通电磁阀(1)进入到被检在线化学仪表传感器(2)，被检在线化学仪表变送器(3)进行测量数据显示。4. The online chemical instrument automatic inspection and calibration system according to claim 1, characterized in that, in a normal measurement state, the control system (6) controls the conduction between the first opening to the third opening of the three-way solenoid valve (1) The second opening to the third opening is disconnected, the solenoid valve (4) is closed, the water output from the water inlet pipe enters the detected online chemical instrument sensor (2) through the three-way solenoid valve (1), and the detected online chemical The instrument transmitter (3) displays the measurement data. 5.一种在线化学仪表自动检验方法，其特征在于，基于权利要求1所述的在线化学仪表自动检验校准系统，包括以下步骤：5. an online chemical instrument automatic inspection method, is characterized in that, based on the online chemical instrument automatic inspection and calibration system described in claim 1, comprises the following steps: 控制系统(6)控制三通电磁阀(1)中第一开口至第三开口之间导通，第二开口至第三开口之间断开，进水管道输出的水分为两路，其中一路进入到被检在线化学仪表传感器(2)中，另一路进入到标准表(5)中，被检在线化学仪表变送器(3)及标准表(5)进行测量值显示，控制系统(6)分别读取被检在线化学仪表变送器(3)及标准表(5)的测量值，根据被检在线化学仪表变送器(3)及标准表(5)的测量值进行被检在线化学仪表的误差计算，完成对被检在线化学仪表的检验。The control system (6) controls the conduction between the first opening and the third opening in the three-way solenoid valve (1), and the disconnection between the second opening and the third opening. The water output from the water inlet pipeline is divided into two paths, one of which enters To the detected online chemical instrument sensor (2), the other way enters the standard table (5), the detected online chemical instrument transmitter (3) and the standard table (5) display the measured value, and the control system (6) Read the measured values of the tested online chemical instrument transmitter (3) and the standard table (5) respectively, and carry out the tested online chemical analysis according to the measured values of the tested online chemical instrument transmitter (3) and the standard table (5). The error calculation of the instrument completes the inspection of the online chemical instrument under inspection. 6.一种在线化学仪表自动检验方法，其特征在于，基于权利要求1所述的在线化学仪表自动检验校准系统，包括以下步骤：控制系统(6)控制三通电磁阀(1)中第二开口至第三开口之间导通，第一开口至第三开口之间断开，电磁阀(4)关闭，标准溶液通过三通电磁阀(1)进入被检在线化学仪表传感器(2)，被检在线化学仪表变送器(3)进行测量值显示，控制系统(6)读取被检在线化学仪表变送器(3)的测量值，利用标准溶液的参数值以及被检在线化学仪表变送器(3)的测量值进行被检在线化学仪表的误差计算，完成对被检在线化学仪表的检验。6. An online chemical instrument automatic inspection method is characterized in that, based on the online chemical instrument automatic inspection and calibration system according to claim 1, comprising the following steps: the control system (6) controls the second in the three-way solenoid valve (1) The opening to the third opening is connected, the first opening to the third opening is disconnected, the solenoid valve (4) is closed, the standard solution enters the detected online chemical instrument sensor (2) through the three-way solenoid valve (1), and is The detection online chemical instrument transmitter (3) displays the measured value, and the control system (6) reads the measurement value of the detected online chemical instrument transmitter (3), and uses the parameter value of the standard solution and the detected online chemical instrument to change the measurement value. The measured value of the transmitter (3) is used to calculate the error of the checked online chemical instrument, and the inspection of the checked online chemical instrument is completed. 7.一种在线化学仪表自动校准方法，其特征在于，基于权利要求1所述的在线化学仪表自动检验校准系统，包括以下步骤：7. An online chemical instrument automatic calibration method, characterized in that, based on the online chemical instrument automatic inspection and calibration system according to claim 1, comprising the following steps: 控制系统(6)控制三通电磁阀(1)中第一开口至第三开口之间导通，第二开口至第三开口之间关断，电磁阀(4)开启，进水管道输出的水分为两路，其中一路经三通电磁阀(1)进入到被检在线化学仪表传感器(2)中，另一路通过电磁阀(4)进入标准表(5)，被检在线化学仪表变送器(3)与标准表(5)进行测量数据显示，控制系统(6)分别读取被检在线化学仪表变送器(3)及标准表(5)的测量值，将被检在线化学仪表变送器(3)的测量值自动校准为标准表(5)的测量值，完成对被检在线化学仪表的校准。The control system (6) controls the conduction between the first opening to the third opening in the three-way solenoid valve (1), the shut-off between the second opening and the third opening, the solenoid valve (4) is opened, and the water output from the water inlet pipeline is turned off. The water is divided into two paths, one of which enters the detected online chemical instrument sensor (2) through the three-way solenoid valve (1), and the other enters the standard meter (5) through the solenoid valve (4), and the detected online chemical instrument transmits The device (3) and the standard meter (5) display the measurement data, and the control system (6) reads the measured values of the tested online chemical meter transmitter (3) and the standard meter (5) respectively, and sends the tested online chemical meter to the measured values. The measured value of the transmitter (3) is automatically calibrated to the measured value of the standard table (5), and the calibration of the detected online chemical instrument is completed. 8.一种在线化学仪表自动校准方法，其特征在于，基于权利要求1所述的在线化学仪表自动检验校准系统，包括以下步骤：8. An online chemical instrument automatic calibration method, characterized in that, based on the online chemical instrument automatic inspection and calibration system according to claim 1, comprising the following steps: 控制系统(6)控制三通电磁阀(1)中第二开口至第三开口之间导通，第一开口至第三开口之间关断，电磁阀(4)关闭，标准溶液通过三通电磁阀(1)进入被检在线化学仪表传感器(2)，被检在线化学仪表变送器(3)进行测量数据显示，控制系统(6)读取被检在线化学仪表变送器(3)的测量值，将被检在线化学仪表变送器(3)的测量值自动校准为标准溶液的对应参数值，完成对被检在线化学仪表的校准。The control system (6) controls the conduction between the second opening and the third opening in the three-way solenoid valve (1), the opening between the first opening and the third opening is closed, the solenoid valve (4) is closed, and the standard solution passes through the three-way opening. The solenoid valve (1) enters the detected online chemical instrument sensor (2), the detected online chemical instrument transmitter (3) displays the measurement data, and the control system (6) reads the detected online chemical instrument transmitter (3) The measured value of the tested online chemical instrument transmitter (3) is automatically calibrated to the corresponding parameter value of the standard solution, and the calibration of the tested online chemical instrument is completed.
CN202210302857.3A 2022-03-25 2022-03-25 Automatic checking and calibrating system and method for online chemical instrument Pending CN114689812A (en)

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