CN212083364U - In-situ calibration device for gas concentration detector in closed environment - Google Patents
In-situ calibration device for gas concentration detector in closed environment Download PDFInfo
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- CN212083364U CN212083364U CN202020506350.6U CN202020506350U CN212083364U CN 212083364 U CN212083364 U CN 212083364U CN 202020506350 U CN202020506350 U CN 202020506350U CN 212083364 U CN212083364 U CN 212083364U
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Abstract
The utility model discloses an airtight environment gas concentration detector normal position calibrating device, including multirange reference standard concentration gas source, standard zero gas source, system control unit, flow control unit and special calibration interface, multirange reference standard concentration gas source and standard zero gas source constitute two way parallel pipelines, are equipped with adjustable flow valve between the two way parallel pipelines. The utility model discloses airtight environment gas concentration detector normal position calibrating device, simple structure, portability and good reliability, the operation is safe convenient, changes the different reference standard gas and can realize the gas detection appearance calibration of corresponding type, and the suitability is good, and calibration work efficiency is high, satisfies the requirement of different grade type gas detection appearance examination regulation, is suitable for the popularization.
Description
Technical Field
The utility model relates to an airtight environment gas concentration detector normal position calibrating device.
Background
The gas concentration detector, the determinator or the detection alarm (hereinafter collectively referred to as the detector) in the closed environment plays a key role in the detection and alarm of hydrogen, ammonia, carbon monoxide, oxygen, hydrogen sulfide and combustible gas in various closed cabin environments, because the working closed environment is complex and the layout range is wide, the calibration work is difficult to be completed in a laboratory after the disassembly, so that the gas concentration detector, the determinator or the detection alarm and other devices in the closed environment cannot be effectively calibrated, the reliability of the operation of the gas concentration detector, the gas concentration detector or the detection alarm can be calibrated in situ on site.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple structure, portable reliable, calibration efficiency height, operation safety convenience, commonality are strong, economic nature is good, the strong airtight environment gas concentration detector normal position calibrating device of environmental adaptability.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: an in-situ calibration device for a gas concentration detector in a closed environment comprises a multi-range reference standard concentration gas source, a standard zero gas source, a system control unit, a flow control unit and a special calibration interface, wherein the multi-range reference standard concentration gas source and the standard zero gas source form two parallel pipelines, an adjustable flow valve is arranged between the two parallel pipelines, the multi-range reference standard concentration gas source pipeline is a calibration branch, and a calibration branch pressure gauge, a reference standard gas output valve, a computer, a programmable electromagnetic valve, a one-way stop valve, a high-accuracy flow meter and the special calibration interface are sequentially connected onto the calibration branch; the standard zero gas source pipeline is a zero branch, and a zero branch pressure gauge, a zero standard gas output valve, a computer, a programmable electromagnetic valve, a one-way stop valve, a high-accuracy flow meter and an adjustable flow valve are sequentially connected to the zero branch.
The multi-range reference standard concentration gas source adopts at least three reference standard concentration gas cylinders connected in parallel.
The standard zero gas source adopts pure nitrogen with the concentration of 99.99 percent to realize the evacuation of the whole pipeline of the device and the zero calibration of the calibrated detector.
The system control unit adopts a programmable electromagnetic valve to realize system control and automatic calculation processing of data through computer programming.
The flow control device adopts a high-accuracy flow meter to realize the connection of two pipelines in a parallel connection mode and controls the working state of the system.
The utility model relates to an airtight environment gas concentration detector normal position calibrating device, simple structure, portability and good reliability, the operation is safe convenient, changes the different reference standard gas and can realize the gas detection appearance calibration of corresponding type, therefore the suitability is good, and calibration work efficiency is high, satisfies the requirement of the gaseous detector examination regulation of different grade type, is suitable for the popularization.
Drawings
Fig. 1 is the utility model relates to a gas concentration detector normal position calibrating device's in airtight environment structural schematic.
In the figure: A. a multi-range reference standard concentration gas source; B. a system control unit; C. a flow control unit; 1. a reference standard concentration gas cylinder; 2. calibrating a branch pressure gauge; 3. a computer; 4. a programmable electromagnetic valve; 5. an adjustable flow valve; 6. a one-way stop valve; 7. a high accuracy flow meter; 8. a dedicated calibration interface; 9. a zero standard gas output valve; 10. a standard zero gas source; 11. a zero branch pressure gauge; 12. a reference standard gas output valve; 13. and (5) a detected detector.
Detailed Description
As shown in fig. 1, the in-situ calibration device for the gas concentration detector in the closed environment comprises a multi-range reference standard concentration gas source a, a standard zero gas source 10, a system control unit B, a flow control unit C and a special calibration interface 8, wherein the multi-range reference standard concentration gas source a and the standard zero gas source 10 form two parallel pipelines, an adjustable flow valve 5 is arranged between the two parallel pipelines, the multi-range reference standard concentration gas source pipeline is a calibration branch, and the calibration branch is sequentially connected with a calibration branch pressure gauge 2, a reference standard gas output valve 12, a computer 3, a programmable electromagnetic valve 4, a one-way stop valve 6, a high-accuracy flow meter 7 and the special calibration interface 8; the standard zero gas source pipeline is a zero branch, a zero branch pressure gauge 11, a zero standard gas output valve 9, a computer 3, a programmable electromagnetic valve 4, a one-way stop valve 6, a high-accuracy flow meter 7 and an adjustable flow valve 5 are sequentially connected to the zero branch, a multi-range reference standard concentration gas source A adopts at least three reference standard concentration gas cylinders 1 which are connected in parallel, various reference standard gases such as hydrogen, ammonia, carbon monoxide, oxygen, hydrogen sulfide and combustible gas can be assembled according to the type of a detector to be calibrated, in-situ calibration of a specified amount of value points of the detector is realized, a system control unit B adopts the programmable electromagnetic valve 4 to realize system control and automatic calculation processing of data through programming of the computer 3, pure nitrogen with the concentration of 99.99 percent is used as the standard zero gas, evacuation of the whole pipeline of the device and zero calibration of the detector to be calibrated are realized, the flow control unit C uses a high-accuracy flow meter with the accuracy grade of 4 and above to realize the connection of two pipelines in a parallel connection mode, the working state of the system is controlled, a special calibration interface is designed to cover a sensor interface of a calibrated detector, the characteristic of the sensor interface meets the chemical and physical characteristics and the environmental requirement of working gas of the calibrated detector, and the influence of environmental factors on calibration work is prevented.
When in-situ calibration of a gas concentration detector in a closed environment is carried out, a special calibration interface 8 of the device is butted with a sensitive element of a detected detector 13, a computer 3 and a system control unit B are started, firstly, a standard zero gas source 10 is connected, a zero standard gas output valve 9 is opened, an adjustable flow valve 5 of a system pipeline is adjusted, a zero branch pressure gauge 11 and a high-accuracy flow meter 7 are observed, zero clearing is carried out on the system, the zero position of the detected detector 13 is calibrated at the same time, and a one-way stop valve 6 ensures that the calibrated standard gas flows correctly; and then closing the standard zero gas source branch, configuring gases with different reference standard concentrations according to the requirements of related operation rules and standard methods, opening a standard gas output valve 12, observing the flow pressure of the standard gases through a calibration branch pressure gauge 2 to ensure the normal flow rate of the gases in the pipeline, automatically controlling a programmable electromagnetic valve 4 by a computer 3, keeping the indication value of a high-accuracy flowmeter 7 of the flow control unit C at a specified flow value, and if the operation rules and the standard methods require more calibration points on the detected detector 13, replacing the standard gases with the required concentrations at a standard concentration gas source interface according to the requirements.
The utility model discloses airtight environment gas concentration detector normal position calibrating device, different grade type detector and calibration point according to relevant examination regulation at first require the standard gas source of the corresponding gas type of configuration and reference concentration, satisfy the needs of polymorphic type, multirange detector calibration, standard zero gas source uses the pure nitrogen gas that the concentration of regulation is 99.99%, used reference standard gas source is external, and can convenient change, can satisfy the requirement of more calibration points of the detector of being examined; secondly, a programmable electromagnetic valve with high reliability is used for automatically controlling the system work and automatically processing the calibration result through a computer; thirdly, controlling the standard gas flow of the calibration branch and the zero branch by using a standard flowmeter with the accuracy grade of more than 4 grade; fourthly, aiming at the shapes and installation modes of sensors of different detectors, a coating type or communicating vessel type special interface for calibration is designed, and the interface has the advantages of convenient connection, certain air tightness and capability of meeting the requirement of work safety.
Claims (5)
1. The utility model provides a gaseous concentration detection appearance normal position calibrating device of airtight environment which characterized in that: the multi-range reference standard concentration gas source and the standard zero gas source form two parallel pipelines, an adjustable flow valve is arranged between the two parallel pipelines, the multi-range reference standard concentration gas source pipeline is a calibration branch, and a calibration branch pressure gauge, a reference standard gas output valve, a computer, a programmable electromagnetic valve, a one-way stop valve, a high-accuracy flow meter and a special calibration interface are sequentially connected onto the calibration branch; the standard zero gas source pipeline is a zero branch, and a zero branch pressure gauge, a zero standard gas output valve, a computer, a programmable electromagnetic valve, a one-way stop valve, a high-accuracy flow meter and an adjustable flow valve are sequentially connected to the zero branch.
2. The in-situ calibration device for the closed environment gas concentration detector according to claim 1, characterized in that: the multi-range reference standard concentration gas source adopts at least three reference standard concentration gas cylinders connected in parallel.
3. The in-situ calibration device for the closed environment gas concentration detector according to claim 1, characterized in that: the standard zero gas source adopts pure nitrogen with the concentration of 99.99 percent to realize the evacuation of the whole pipeline of the device and the zero calibration of the calibrated detector.
4. The in-situ calibration device for the closed environment gas concentration detector according to claim 1, characterized in that: the system control unit adopts a programmable electromagnetic valve to realize system control and automatic calculation processing of data through computer programming.
5. The in-situ calibration device for the closed environment gas concentration detector according to claim 1, characterized in that: the flow control device adopts a high-accuracy flow meter to realize the connection of two pipelines in a parallel connection mode and controls the working state of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020506350.6U CN212083364U (en) | 2020-04-09 | 2020-04-09 | In-situ calibration device for gas concentration detector in closed environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020506350.6U CN212083364U (en) | 2020-04-09 | 2020-04-09 | In-situ calibration device for gas concentration detector in closed environment |
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| CN212083364U true CN212083364U (en) | 2020-12-04 |
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| CN202020506350.6U Expired - Fee Related CN212083364U (en) | 2020-04-09 | 2020-04-09 | In-situ calibration device for gas concentration detector in closed environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008336A (en) * | 2021-02-18 | 2021-06-22 | 合肥工业大学 | Method for realizing permanent magnet sodium flowmeter cross-correlation method in-situ calibration based on error correction |
-
2020
- 2020-04-09 CN CN202020506350.6U patent/CN212083364U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008336A (en) * | 2021-02-18 | 2021-06-22 | 合肥工业大学 | Method for realizing permanent magnet sodium flowmeter cross-correlation method in-situ calibration based on error correction |
| CN113008336B (en) * | 2021-02-18 | 2022-07-12 | 重庆川仪自动化股份有限公司 | Method for realizing permanent magnet sodium flowmeter cross-correlation method in-situ calibration based on error correction |
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