A device suitable for automatic detection of a zirconium oxide oxygen analyzer

Abstract

The application discloses a kind of instrument detection device, in particular to a kind of device suitable for the automatic detection of zirconium oxide oxygen analyzer.Its structure is as follows: gas supply system is used to transport standard gas for the instrument (23) to be detected, vacuum detection system is used to detect the vacuum leakage of the instrument (23) to be detected, the electric contact vacuum gauge (6) of vacuum detection system is connected with programmable controller (9) two-way communication, programmable controller (9) is connected with integrated touch screen (8) two-way communication, for collecting the millivoltmeter (16) of the output signal of the instrument (23) to be detected and the input end of the output end of each transmitter and programmable controller (9) is connected, the output end of programmable controller (9) and the actuator of gas supply system and vacuum detection system are connected.The application has the characteristics of high accuracy, not by human factors interference, automatic recording, timeliness, multi-index detection, and its detection precision is high, detection efficiency is high.

Description

Technical Field

[0001] This invention relates to a detection device, and more particularly to a device suitable for automatic detection of zirconia oxygen content analyzers, belonging to the field of instrumentation technology. Background Technology

[0002] A zirconia oxygen analyzer mainly consists of a zirconia transmitter and a zirconia probe. It is considered a convenient and reliable method for measuring oxygen content in various boiler exhaust gases. This necessitates that each analyzer's readings be accurate. Currently, there is no specialized instrument for testing zirconia analyzers in this field; testing is primarily done manually and visually by technicians, resulting in poor instrument accuracy and stability, causing significant production problems.

[0003] The technical specifications that need to be tested for a zirconia oxygen analyzer are as follows: response time, background potential, zirconia cell internal resistance, measurement accuracy, linearity, transmission accuracy and fluctuation, probe leakage, and heating temperature fluctuation.

[0004] The traditional zirconia oxygen analyzer's detection indicators, methods, and existing technical problems are as follows: Response time detection is done visually and manually, which suffers from poor accuracy, instability, and significant susceptibility to human factors; background potential detection is also done visually and manually, again suffering from poor accuracy, instability, and significant susceptibility to human factors; zirconia cell internal resistance detection is also done visually and manually, again suffering from poor accuracy, instability, and significant susceptibility to human factors; measurement accuracy detection is also done visually and manually, again suffering from poor accuracy, instability, and significant susceptibility to human factors; linearity detection is also done visually and manually, again suffering from poor accuracy, instability, and significant susceptibility to human factors; transmission accuracy and fluctuation detection is also done visually and manually, again suffering from poor accuracy, instability, and significant susceptibility to human factors; probe leakage is generally not tested; heating temperature fluctuation detection is done visually or not at all.

[0005] Currently, there is essentially no reliable standard applicable to the testing of zirconia oxygen analyzers. Testing methods vary among different manufacturers and users. The main method involves simple manual observation and recording of the instrument's display values ​​by inspectors. There is no standardized and comprehensive testing method for checking for leaks in the zirconia probe, and the results from different inspectors using the same analyzer can have significant errors.

[0006] In addition, there is no method to detect the leakage of zirconia probes, manual recording may cause data errors, and manual reports are subject to human interference, resulting in poor reliability.

[0007] Ensuring that the accuracy, precision, and degradation of newly manufactured zirconia oxygen analyzers and those used in operating environments for a period of time meet the technical standards is a pressing technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a device suitable for automatic detection of zirconia oxygen content analyzer. It has the characteristics of high accuracy, no human interference, automatic recording, timeliness, and multi-index detection, and has high detection precision and high detection efficiency.

[0009] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0010] A device for automatically detecting zirconia oxygen analyzers has the following structure: a gas supply system for supplying standard gas to the instrument under test; a vacuum detection system for detecting vacuum leakage in the instrument under test; a vacuum gauge with electrical contacts in the vacuum detection system is bidirectionally connected to a programmable controller (PLC); the PLC is bidirectionally connected to an integrated touchscreen; the output terminals of a millivoltmeter for acquiring the output signals of the instrument under test and each transmitter are connected to the input terminals of the PLC; and the output terminals of the PLC are connected to the actuators of the gas supply system and the vacuum detection system.

[0011] Preferably, the above-mentioned air supply system is structured as follows: the air pump and the outlet of each of the first, second, and third standard gas cylinders are connected to a multi-channel air converter, and the outlet of the multi-channel air converter is connected to the instrument being tested through a pipeline, on which a float flow meter is installed.

[0012] Preferably, the structure of the above-mentioned vacuum detection system is as follows: the negative pressure tank is connected to the instrument being tested, the negative pressure tank is equipped with a second vacuum solenoid valve, the vacuum pump is connected to the negative pressure tank through a gas supply pipeline, and the gas supply pipeline is equipped with an electric contact vacuum gauge and a first vacuum solenoid valve.

[0013] Preferably, each of the above transmitters includes an oxygen transmitter, a resistance transmitter, and a temperature transmitter, wherein the resistance transmitter and the temperature transmitter are electrically connected to the instrument being tested.

[0014] Preferably, the instrument being tested is electrically connected to the rotary switch, and the rotary switch is in contact with the millivoltmeter or oxygen transmitter.

[0015] Preferably, the millivoltmeter is connected in parallel with the variable resistor.

[0016] Preferably, the actuator structure of the above-mentioned gas supply system and vacuum detection system includes a first vacuum solenoid valve, a second vacuum solenoid valve, a first manual contactor, and a second contactor.

[0017] Preferably, the air pump is connected to a first power source via the manual first contactor, the second contactor is electrically connected to a second power source, and the second contactor is electrically connected to a vacuum pump; the output terminal of the programmable controller is connected to the second contactor, and the input terminals of the first vacuum solenoid valve and the second vacuum solenoid valve are connected to the output terminal of the programmable controller.

[0018] Preferably, the output terminal of the integrated touch screen is connected to a printer.

[0019] Preferably, the programmable controllers mentioned above are Hollysys LE5107L and LE5310; the integrated touch screen is Kunlun TPC1071Gt.

[0020] By adopting the above technical solution, the present invention has the following characteristics and effects:

[0021] The specific functions of this invention are as follows:

[0022] 1. Calculate the interaction between oxygen content and oxygen potential at different temperatures, and the output current value under different oxygen content ranges. The system features automatic response time detection and recording, high accuracy, zero error, consistent measurement values, and automatic detection of measurement results as "qualified" or "unqualified" without manual judgment.

[0023] 2. The background potential value is accurate and error-free, and the measured values ​​are consistent.

[0024] 3. The internal resistance of the zirconium oxide battery is detected and recorded by a computer program, with high accuracy, no error, and consistent measurement values.

[0025] 4. Measurement accuracy: Automatic detection and recording ensures high accuracy, zero error, and consistent measurement values.

[0026] 5. Linearity: Computer program detection and recording ensures high accuracy, zero error, and consistent measurement values.

[0027] 6. The accuracy and fluctuation of transmission are detected and recorded by computer program, with high accuracy, no error, and consistent measurement values.

[0028] 7. Probe leakage is controlled by a high-precision pressure sensor. The computer program detects and records data, ensuring high accuracy, zero error, and consistent measurement values.

[0029] 8. Heating temperature fluctuations, continuous curves and digital displays, automatic display and recording of fault points.

[0030] 9. Display and recording of fault points.

[0031] 10. Automatic storage of test data.

[0032] 11. The test results can be judged and reports generated, and can be stored for a long time or printed directly.

[0033] 12. The integrated touch screen preferably adopts a multi-screen color touch screen, which can display continuous curves, various measurement indicators, record fault points, and automatically determine whether the measurement indicators are "qualified" or "unqualified".

[0034] This invention is a relatively complete zirconia oxygen analyzer testing instrument. It automatically detects the main technical indicators required by the instrument, displaying "qualified" or "unqualified" without manual judgment. It outputs data over a long period, automatically recording any fault points. No fault points are missed, and no human error is introduced into the testing. All test data can be stored and archived long-term. This reduces production costs while improving testing efficiency and quality. It features high accuracy, immunity to human interference, automatic recording, timeliness, and multi-indicator testing, resulting in high precision and efficiency. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the gas path system structure of the present invention.

[0036] Figure 2 This is a schematic diagram of the circuit system structure of the present invention.

[0037] Figure 3 A schematic diagram of the overall structure of the present invention.

[0038] In the diagram: 1. Negative pressure tank; 2. Oxygen transmitter; 3. Vacuum pump; 4. Resistance transmitter; 5. Temperature transmitter; 6. Electrical contact vacuum gauge; 7. First vacuum solenoid valve; 8. Integrated touch screen; 9. Programmable controller; 10. Variable resistor; 11. Float flow meter; 12. Multi-channel gas converter; 14. Air pump; 15. Printer; 16. Millivoltmeter; 17. Second vacuum solenoid valve; 19. First power supply; 20. Second power supply; 21. Manual first contactor; 22. Second contactor; 23. Instrument under test; 24. Rotary switch; 25. First standard gas cylinder; 26. Second standard gas cylinder; 27. Third standard gas cylinder. Detailed Implementation

[0039] The present invention will be further illustrated below with specific examples. However, these embodiments are merely illustrative and not intended to limit the scope of the invention. Equivalent variations made according to the substance and scope defined in the claims of the present invention shall still fall within the scope of the present invention.

[0040] Unless otherwise specified, the following embodiments are all conventional techniques.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides an automatic detection device for a zirconia oxygen analyzer. Its structure is as follows: a gas supply system supplies standard gas to the instrument under test (23); a vacuum detection system detects vacuum leakage in the instrument under test (23); the vacuum gauge 6 of the vacuum detection system is bidirectionally connected to the programmable controller (9); a millivoltmeter 16 is electrically connected in parallel to a variable resistor 10; the programmable controller 9 is bidirectionally connected to an integrated touchscreen 8; the output of the integrated touchscreen 8 is connected to a printer 15; the outputs of the millivoltmeter 16 and each transmitter used to collect the output signal of the instrument under test (23) are connected to the input of the programmable controller 9; and the output of the programmable controller 9 is connected to the actuators of the gas supply system and the vacuum detection system.

[0042] The above-mentioned air supply system structure is as follows: the air pump 14 and the outlet of the first standard gas cylinder 25, the second standard gas cylinder 26, the third standard gas cylinder, and the outlet of each standard gas cylinder 27 are connected to the multi-channel air converter 12. The outlet of the multi-channel air converter 12 is connected to the instrument under test 23 through a pipeline, and a float flow meter 11 is installed on the pipeline.

[0043] The structure of the vacuum detection system described above is as follows: the negative pressure tank 1 is connected to the instrument 23 being tested, the negative pressure tank 1 is equipped with a second vacuum solenoid valve 17, the vacuum pump 3 is connected to the negative pressure tank 1 through a gas supply pipeline, and the gas supply pipeline is equipped with an electric contact vacuum gauge 6 and a first vacuum solenoid valve 7.

[0044] The aforementioned transmitters include an oxygen transmitter 2, a resistance transmitter 4, and a temperature transmitter 5. The resistance transmitter 4 and the temperature transmitter 5 are electrically connected to the instrument under test 23. The instrument under test 23 is electrically connected to a rotary switch 24, and the rotary switch 24 is in contact with a millivoltmeter 16 or an oxygen transmitter 2.

[0045] The actuator structure of the aforementioned gas supply system and vacuum detection system includes a first vacuum solenoid valve 7, a second vacuum solenoid valve 17, a first manual contactor 21, and a second contactor 22.

[0046] Air pump 14 is connected to first power supply 19 via manual first contactor 21, second contactor 22 is electrically connected to second power supply 20, and second contactor 22 is electrically connected to vacuum pump 3; the output terminal of programmable controller 9 is connected to second contactor 22, and the input terminals of first vacuum solenoid valve 7 and second vacuum solenoid valve 17 are connected to the output terminal of programmable controller 9.

[0047] In the following detailed examples of the present invention, the following types of electrical components may be preferred for each component, but this shall not be used to limit the scope of protection of the present invention, and the selected type of component may be replaced by other types of components with equivalent effects. Among them, the programmable controller 9 can be: Hollysys LE5107L, LE5310; integrated touch screen 8: Kunlun TPC1071Gt; vacuum pump 3: VACUUM-01; first vacuum solenoid valve 7 and second vacuum solenoid valve 17: TV301V-5G1; printer 15: HP DesKJet1112; millivoltmeter 16: AI-501-mV; temperature transmitter 5: AI-501-T; resistance transmitter 4: COSO-2K; electrical contact vacuum gauge 6: HONGQI-0--0.01; float flowmeter 11: LZB60-600mL / min; variable resistor 10: ZX55; air pump 14: TNY32-6D0; first contactor and second contactor: RXM24VD. As a preferred option, such as Figure 1 , Figure 2 and Figure 3As shown, the detailed connection relationship of the device for automatic detection of zirconia oxygen analyzer according to the present invention is described as follows: The integrated touch screen 8 is bidirectionally connected to the RS485 port of the programmable controller 9. The output end of the integrated touch screen 8 is connected to the printer 15 through the USB port. The negative pressure tank 1 is provided with a second vacuum solenoid valve 17. The input end of the second vacuum solenoid valve 17 is electrically connected to the output port Q.02 of the programmable controller 9. The vacuum pump 3 is connected to the negative pressure tank 1 through a gas supply pipeline. The gas supply pipeline is provided with an electric contact vacuum gauge 6 and a first vacuum solenoid valve 7. The first vacuum solenoid valve 7 is connected to the output port Q.01 of the programmable controller 9. The electric contact vacuum gauge 6 is bidirectionally connected to the I.01 and I.02 ports of the programmable controller 9. The output terminal Q.00 of the programmable controller 9 is connected to the second contactor 22, which is electrically connected to the second power supply 20 and the vacuum pump 3. The air pump 14 is connected to the first power supply 19 via the manual first contactor 21. The air pump 14 and the outlets of the first standard gas cylinder 25, the second standard gas cylinder 26, the third standard gas cylinder, and the standard gas cylinder 27 are connected to the multi-channel gas converter 12. The outlet of the multi-channel gas converter 12 is connected to the instrument under test 23 via a pipeline. A float flow meter 11 is installed on the pipeline. The instrument under test 23... The rotary switch 24 is electrically connected to the millivoltmeter 16 or the oxygen transmitter 2. The output terminal of the millivoltmeter 16 is connected to the input port RA of the programmable controller 9. The variable resistor 10 is electrically connected in parallel with the millivoltmeter 16. The output terminal of the oxygen transmitter 2 is connected to the input port RD of the programmable controller 9. The instrument being tested 23 is electrically connected to the resistance transmitter 4 and the temperature transmitter 5. The output terminal of the resistance transmitter 4 is connected to the input port RB of the programmable controller 9. The output terminal of the temperature transmitter 5 is connected to the input port RC of the programmable controller 9.

[0048] The working principle of this invention is as follows: Figure 1 , Figure 2 and Figure 3 The gas path system of the present invention consists of a gas supply system that delivers standard gas to the instrument under test 23 and a vacuum detection system that detects vacuum leakage in the instrument under test 23. The vacuum gauge 6 of the vacuum detection system outputs the detected data to the programmable controller 9. After the programmable controller 9 performs calculations and comparisons with the standard values ​​stored in its internal memory, it outputs the results to the integrated touch screen 8. The integrated touch screen 8 records and stores the data. Each transmitter used to collect the output signal of the instrument under test 23 outputs the collected signal to the programmable controller 9. The programmable controller 9 outputs the detection data to the integrated touch screen 8. The integrated touch screen 8 outputs control signals to the programmable controller 9. The programmable controller 9 outputs control signals to the actuators of the gas supply system and the vacuum detection system.

[0049] The working process of the present invention is as follows:

[0050] An output instruction is triggered on the integrated touch screen 8, the second contactor 22 is triggered through the programmable logic controller 9, the first solenoid valve 7 is opened, the second solenoid valve 17 is closed, and the vacuum pump 3 is started. The normally open contact of the vacuum gauge 6 is closed, and an instruction is output through the programmable logic controller 9 to control to the set vacuum degree, the first solenoid valve 7 is closed, and the second solenoid valve 17 is closed. At the unit time (already set) set on the integrated touch screen 8, the normally closed contact of the vacuum gauge 6 does not start, and the leakage index of the inspected instrument is qualified, otherwise it is unqualified. After being automatically recorded and stored on the integrated touch screen 8, an instruction is output to close the first solenoid valve 7 and open the second solenoid valve 17, and the negative pressure tank 1 is depressurized.

[0051] The rotary switch 24 contacts the millivoltmeter 16 and sends an output signal to the programmable logic controller 9; manually start the air pump 14, rotate the multi-channel gas path converter 12 to the first gas path, and the rotameter 11 controls the flow rate. After the value of the millivoltmeter 16 is stable, this millivolt value is the background potential, and a background confirmation is triggered on the integrated touch screen 8 and automatically recorded and stored on the integrated touch screen 8.

[0052] The rotary switch 24 contacts the millivoltmeter 16 and sends an output signal to the programmable logic controller 9; open the first standard gas cylinder 25, rotate the multi-channel gas path converter 12 to the second gas path, and the rotameter 11 controls the flow rate. After the value of the millivoltmeter 16 is stable, there is a stable value for the millivolt value. Adjust the variable resistor 10 until the value of the millivoltmeter 16 is 1 / 2 of the previous value, and an internal resistance confirmation is triggered on the integrated touch screen 8 and automatically recorded and stored on the integrated touch screen 8.

[0053] The rotary switch 24 contacts the oxygen transmitter 2 and sends an output signal to the programmable logic controller 9; open the first standard gas cylinder 25, rotate the multi-channel gas path converter 12 to the second gas path, and the rotameter 11 controls the flow rate. After the value of the oxygen transmitter 2 is stable, an oxygen 1 confirmation is triggered on the integrated touch screen 8 and automatically recorded and stored on the integrated touch screen 8.

[0054] The rotary switch 24 contacts the oxygen transmitter 2 and sends an output signal to the programmable logic controller 9; open the second standard gas cylinder 26, rotate the multi-channel gas path converter 12 to the third gas path, and the rotameter 11 controls the flow rate. After the value of the oxygen transmitter 2 is stable, an oxygen 2 confirmation is triggered on the integrated touch screen 8, and the detection system automatically records it.

[0055] The rotary switch 24 contacts the oxygen transmitter 2 and sends an output signal to the programmable logic controller 9; open the third standard gas cylinder 27, rotate the multi-channel gas path converter 12 to the fourth gas path, and the rotameter 11 controls the flow rate. After the value of the oxygen transmitter 2 is stable, an oxygen 3 confirmation is triggered on the integrated touch screen 8 and automatically recorded and stored on the integrated touch screen 8.

[0056] Rotary switch 24 contacts oxygen transmitter 2, starts air pump 14, rotates multi-channel air converter 12 to the first air channel, float flow meter 11 controls the flow rate, after oxygen transmitter 2 value stabilizes, oxygen quantity 4 is confirmed on integrated touch screen 8, and output signal is sent to programmable controller 9; automatic recording and storage are turned on.

[0057] After the above-mentioned test indicators are completed, the integrated touch screen 8 can output instructions to the printer 15 to print out the above test values ​​in a standard table.

Claims

1. A device suitable for automatic detection in a zirconia oxygen analyzer, characterized in that... The structure is as follows: the gas supply system is used to supply standard gas to the instrument under test (23), the vacuum detection system is used to detect the vacuum leakage of the instrument under test (23), the vacuum gauge (6) of the vacuum detection system is bidirectionally connected to the programmable controller (9), the programmable controller (9) is bidirectionally connected to the integrated touch screen (8), the millivoltmeter (16) used to collect the output signal of the instrument under test (23) and the output terminals of each transmitter are connected to the input terminal of the programmable controller (9), and the output terminal of the programmable controller (9) is connected to the actuator of the gas supply system and the vacuum detection system; the structure of the gas supply system is as follows: the air pump (14) and the outlet of the first standard gas cylinder (25), the second standard gas cylinder (26), and the third standard gas cylinder (27) are connected to the multi-channel gas converter (12), the outlet of the multi-channel gas converter (12) is connected to the instrument under test (23) through the pipeline, and a float flow meter (11) is installed on the pipeline. The vacuum detection system structure is as follows: the negative pressure tank (1) is connected to the instrument under test (23), the negative pressure tank (1) is equipped with a second vacuum solenoid valve (17), the vacuum pump (3) is connected to the negative pressure tank (1) through the gas supply pipeline, and the gas supply pipeline is equipped with an electric contact vacuum gauge (6) and a first vacuum solenoid valve (7); the gas supply system and the actuator structure of the vacuum detection system include a first vacuum solenoid valve (7), a second vacuum solenoid valve (17), a manual first contactor (21), and a second contactor (22). The air pump (14) is connected to the first power supply (19) through the manual first contactor (21), the second contactor (22) is electrically connected to the second power supply (20), and the second contactor (22) is electrically connected to the vacuum pump (3); the output end of the programmable controller (9) is connected to the second contactor (22), and the input ends of the first vacuum solenoid valve (7) and the second vacuum solenoid valve (17) are connected to the output end of the programmable controller (9).

2. The device for automatic detection of zirconia oxygen content in a zirconia analyzer according to claim 1, characterized in that... The transmitters include an oxygen transmitter (2), a resistance transmitter (4), and a temperature transmitter (5), and the resistance transmitter (4) and the temperature transmitter (5) are electrically connected to the instrument being tested (23).

3. The device for automatic detection in a zirconia oxygen analyzer according to claim 2, characterized in that... The instrument being tested (23) is electrically connected to the rotary switch (24), and the rotary switch (24) is in contact with the millivoltmeter (16) or the oxygen transmitter (2).

4. A device for automatically detecting oxygen content in a zirconia analyzer according to claim 1 or 3, characterized in that... The millivoltmeter (16) is electrically connected in parallel with the variable resistor (10).

5. The device for automatic detection in a zirconia oxygen analyzer according to claim 1, characterized in that... The output end of the integrated touch screen (8) is connected to the printer (15).

6. The device for automatic detection of zirconia oxygen content in a zirconia analyzer according to claim 1, characterized in that... The programmable controller (9) is Hollysys LE5107L or LE5310; the integrated touch screen (8) is Kunlun TPC1071Gt.

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