CN217787034U - Nitrogen-oxygen conversion calibration device - Google Patents
Nitrogen-oxygen conversion calibration device Download PDFInfo
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- CN217787034U CN217787034U CN202221235662.3U CN202221235662U CN217787034U CN 217787034 U CN217787034 U CN 217787034U CN 202221235662 U CN202221235662 U CN 202221235662U CN 217787034 U CN217787034 U CN 217787034U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The utility model relates to an automobile exhaust gas detection device, in order to improve the detection efficiency to the conversion rate of exhaust gas analyzer, provide a nitrogen-oxygen conversion calibration device, including the nitric oxide source, the first valve of being connected with the nitric oxide source, the first connecting pipe of being connected with first valve, keep away from the first three-way valve that first valve one end is connected with first connecting pipe, zero air supply, the nitrogen dioxide air supply, the second valve of being connected with the nitrogen dioxide air supply, the second connecting pipe of being connected with the second valve to and keep away from the second three-way valve that second valve one end is connected with the second connecting pipe; the first three-way valve and the second three-way valve are both connected with the waste gas analyzer, the zero gas source is connected with the first three-way valve and the second three-way valve simultaneously, the side wall of the first connecting pipe is connected with a first pressure sensor, and the side wall of the second connecting pipe is connected with a second pressure sensor. The utility model discloses a nitrogen oxygen conversion calibration device can high-efficiently and accurately detect exhaust gas analyzer's conversion efficiency.
Description
Technical Field
The utility model relates to an automobile exhaust detection device's technical field particularly, relates to a nitrogen oxygen conversion calibration device.
Background
One of the most important items in annual inspection of automobiles is to reach the exhaust emission standard, because the emission standard is related to serious environmental pollution problems, and therefore, the emission standard needs to be paid extra attention.
For the detection of the automobile exhaust emission, one of the methods is to detect the content of oxynitride in the exhaust, and the oxynitride can pollute the environment and human health to a certain extent, so that the content of oxynitride in the automobile exhaust is required to be lower than a certain value.
The conventional detection method is to discharge tail gas into an exhaust gas analyzer, and the exhaust gas analyzer is used for detecting the content of nitrogen oxides in the exhaust gas, wherein the nitrogen oxides mainly comprise nitric oxide and nitrogen dioxide, but the exhaust gas analyzer can only detect the nitric oxide, so that the nitrogen dioxide is required to be converted into the nitric oxide for detection, the problem of conversion rate of the nitrogen dioxide into the nitric oxide is involved, when the content of the nitrogen dioxide in the exhaust gas is higher, if the conversion rate of the nitrogen dioxide of the exhaust gas analyzer is low, the final data can be caused to have larger deviation, and therefore the conversion efficiency of the nitrogen dioxide of the exhaust gas analyzer needs to be regularly detected. The common detection method is to introduce standard nitric oxide into the exhaust gas analyzer to obtain a measured value, introduce zero gas (zero gas refers to gas with the minimum scale for adjusting the gas analyzer and gas which shows zero when entering the analyzer, the zero gas should not contain components to be measured or interfering substances but can contain components irrelevant to the measurement, generally use high-purity nitrogen or clean air without the components to be measured as the zero gas), take an average value after multiple times, introduce nitrogen dioxide, measure a numerical value, introduce zero gas, obtain the average value after multiple times, and finally calculate the conversion rate of nitrogen dioxide in the exhaust gas analyzer according to the numerical value. However, the above process is not only cumbersome, but also requires frequent connection/disconnection of the waste analyzer to/from various gas pipelines during the whole process, which is time-consuming and labor-consuming in operation and prone to error.
Therefore, the efficiency can be improved to a certain extent by designing a device which can be used for calibrating the nitrogen dioxide conversion efficiency of the waste analyzer efficiently.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a nitrogen oxygen conversion calibration device, its conversion efficiency that can high-efficiently and accurately detect exhaust gas analyzer.
The embodiment of the utility model discloses a realize through following technical scheme: the utility model discloses a nitrogen oxygen conversion calibration device, including the nitric oxide source, with the first valve that the nitric oxide source is connected, with the first connecting pipe that the first valve is connected, keep away from the first three-way valve that first valve one end is connected with the first connecting pipe, zero air supply, the nitrogen dioxide air supply, with the second valve that the nitrogen dioxide air supply is connected, with the second connecting pipe that the second valve is connected, and keep away from the second three-way valve that second valve one end is connected with the second connecting pipe; the first three-way valve with the second three-way valve all is connected with exhaust gas analyzer, zero air supply simultaneously with the first three-way valve with the second three-way valve is connected, first connecting pipe lateral wall is connected with first pressure sensor, second connecting pipe lateral wall is connected with second pressure sensor.
Furthermore, the gas-liquid separation device also comprises a nitric oxide gas bag which is in conductive connection with the side wall of the first connecting pipe.
Furthermore, the nitrogen dioxide gas bag is in conductive connection with the side wall of the second connecting pipe.
Furthermore, a first conduit and a second conduit are arranged at the outlet end of the zero gas source, one end of the first conduit, which is far away from the zero gas source, is connected with the first three-way valve, and the first conduit is provided with a third valve; one end of the second conduit, which is far away from the zero gas source, is connected with the second three-way valve, and the second conduit is provided with a fourth valve.
Further, the first valve, the second valve, the first three-way valve and the second three-way valve are all electromagnetic valves.
Further, the three valves and the fourth valve are electromagnetic valves.
The utility model discloses technical scheme has following advantage and beneficial effect at least: the utility model discloses a nitrogen oxygen conversion calibration device, when using, first three-way valve switches on first connecting pipe and exhaust gas analyzer, and the nitrogen monoxide source passes through first valve this moment, and first three-way valve lets in standard nitrogen monoxide gas to exhaust gas analyzer, exhaust gas analyzer output numerical value, then first three-way valve makes zero air supply and exhaust gas analyzer switch on, and zero air supply is through the gas that does not contain nitrogen monoxide and nitrogen dioxide, and nitrogen monoxide and nitrogen dioxide in the exhaust gas analyzer are discharged totally, and multiple repetition lets in nitrogen monoxide and zero gas in proper order to exhaust gas analyzer; the second three-way valve conducts the second connecting pipe with the waste gas analyzer, standard nitrogen dioxide in the nitrogen dioxide gas source enters the waste gas analyzer through the second valve and the second three-way valve, numerical values are output after conversion, then the second three-way valve conducts the zero gas source with the waste gas analyzer, nitrogen monoxide and nitrogen dioxide in the waste gas analyzer are completely discharged by using the zero gas, nitrogen dioxide and the zero gas are repeatedly introduced into the waste gas analyzer for a plurality of times, and finally the conversion efficiency of the waste gas analyzer is calculated according to the obtained numerical values. The device that will provide standard nitric oxide, standard nitrogen dioxide and zero gas for abandonment analysis appearance in this device integrates as an organic whole, makes its various pipelines of the various pipelines of not needing frequent connection/disconnection when the operation, and the holistic leakproofness of device is better, and the operation is more standard, and the rate of accuracy is higher.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a nitrogen-oxygen conversion calibration apparatus provided by an embodiment of the present invention.
Icon: 10-nitric oxide source, 11-first valve, 12-first connecting pipe, 13-first three-way valve, 14-nitric oxide air bag, 15-first pressure sensor, 20-zero air source, 21-first conduit, 22-second conduit, 23-third valve, 24-fourth valve, 30-nitrogen dioxide air source, 31-second valve, 32-second connecting pipe, 33-second three-way valve, 34-nitrogen dioxide air bag, 35-second pressure sensor and 40-waste gas analyzer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of this application is used, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific orientation, be constructed in a specific orientation and be operated is not to be construed as limiting the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be broadly construed, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
As further described below with reference to the specific embodiment, as shown in fig. 1, the nitrogen-oxygen conversion calibration apparatus of the embodiment includes a nitric oxide source 10, a first valve 11 connected to the nitric oxide source 10, a first connection pipe 12 connected to the first valve 11, a first three-way valve 13 connected to one end of the first connection pipe 12 away from the first valve 11, a zero gas source 20, a nitrogen dioxide gas source 30, a second valve 31 connected to the nitrogen dioxide gas source 30, a second connection pipe 32 connected to the second valve 31, and a second three-way valve 33 connected to one end of the second connection pipe 32 away from the second valve 31; the first three-way valve 13 and the second three-way valve 33 are both connected with the exhaust gas analyzer 40, the zero gas source 20 is simultaneously connected with the first three-way valve 13 and the second three-way valve 33, the side wall of the first connecting pipe 12 is connected with the first pressure sensor 15, and the side wall of the second connecting pipe 32 is connected with the second pressure sensor 35. Specifically, when the device is used, the first three-way valve 13 conducts the first connecting pipe 12 with the exhaust gas analyzer 40, at this time, the nitric oxide source 10 passes through the first valve 11, the first three-way valve 13 introduces standard nitric oxide gas into the exhaust gas analyzer 40, the exhaust gas analyzer 40 outputs a numerical value, then the first three-way valve 13 conducts the zero gas source 20 with the exhaust gas analyzer 40, the zero gas source 20 completely discharges nitrogen oxide and nitrogen dioxide in the exhaust gas analyzer 40 through gas without nitrogen oxide and nitrogen dioxide, and the nitrogen oxide and the zero gas are sequentially introduced into the exhaust gas analyzer 40 repeatedly for many times; the second three-way valve 33 connects the second connecting pipe 32 with the exhaust gas analyzer 40, the standard nitrogen dioxide in the nitrogen dioxide gas source 30 enters the exhaust gas analyzer 40 through the second valve 31 and the second three-way valve 33, a numerical value is output after conversion, then the second three-way valve 33 connects the zero gas source 20 with the exhaust gas analyzer 40, nitrogen monoxide and nitrogen dioxide in the exhaust gas analyzer 40 are discharged by using the zero gas, the nitrogen dioxide and the zero gas are repeatedly introduced into the exhaust gas analyzer 40 for many times, and finally the conversion efficiency of the exhaust gas analyzer 40 is calculated according to the obtained numerical value (according to the "motor vehicle emission periodic inspection specification" of the zero gas source 20 of the HJ123 second conduit 227-20 first pressure sensor 1521). The device that will provide standard nitric oxide, standard nitrogen dioxide and zero gas for abandonment analysis appearance in this device integrates as an organic whole, makes its various pipelines of the various pipelines of not needing frequent connection/disconnection when the operation, and the holistic leakproofness of device is better, and the operation is more standard, and the rate of accuracy is higher. It should be noted that the zero gas used in this example is nitrogen.
In this embodiment, the nitric oxide gas bag further comprises a nitric oxide gas bag 14 which is in conductive connection with the side wall of the first connecting pipe 12. Specifically, although the first valve 11 can be matched with the first gas pressure sensor, and the second valve 31 can be matched with the second sensor to control the flow of nitric oxide and nitrogen dioxide, the fluctuation of gas flow always occurs in the pipeline, so the nitric oxide gas bag 14 mainly has the function of adjusting the stability of the nitric oxide gas flow, when the flow of nitric oxide in the first connecting pipe 12 is too large, the nitric oxide gas bag 14 can be opened, at the moment, the high-flow nitric oxide can be prevented from entering the first three-way valve 13, when the flow of nitric oxide in the first connecting pipe 12 is small, the gas in the nitric oxide gas bag 14 can enter the connecting pipe again, and thus the nitric oxide gas bag 14 can play a certain pressure stabilizing role.
In this embodiment, a nitrogen dioxide gas bag 34 is further included, which is in fluid connection with the sidewall of the second connecting pipe 32. In particular, the nitrogen dioxide balloon 34 functions much like the nitric oxide balloon 14.
In this embodiment, a first conduit 21 and a second conduit 22 are disposed at an outlet end of the zero gas source 20, one end of the first conduit 21, which is far away from the zero gas source 20, is connected to the first three-way valve 13, and the first conduit 21 is provided with a third valve 23; the end of the second conduit 22 away from the zero gas source 20 is connected to a second three-way valve 33, and the second conduit 22 is provided with a fourth valve 24. Specifically, the zero gas that will discharge nitric oxide and discharge nitrogen dioxide separates into solitary pipeline, can avoid the palirrhea condition of gas to can control the air current better.
The first valve 11, the second valve 31, the first three-way valve 13, and the second three-way valve 33 in this embodiment are all electromagnetic valves. The third valve and the fourth valve 24 are electromagnetic valves. Specifically, the electromagnetic valve can realize the automatic operation of the whole process, and the detection efficiency and the accuracy are improved.
The utility model discloses technical scheme has following advantage and beneficial effect at least: the utility model discloses a nitrogen oxygen conversion calibration device, when using, first three-way valve 13 switches on first connecting pipe 12 and exhaust gas analyzer 40, nitrogen monoxide source 10 passes through first valve 11 this moment, first three-way valve 13 lets in standard nitrogen monoxide gas to exhaust gas analyzer 40, exhaust gas analyzer 40 output numerical value, then first three-way valve 13 makes zero air supply 20 and exhaust gas analyzer 40 switch on, zero air supply 20 is through the gas that does not contain nitrogen monoxide and nitrogen dioxide, nitrogen monoxide and nitrogen dioxide in exhaust gas analyzer 40 are arranged totally, and multiple repetition lets in nitrogen monoxide and zero gas in proper order to exhaust gas analyzer 40; the second three-way valve 33 connects the second connection pipe 32 with the exhaust gas analyzer 40, the standard nitrogen dioxide in the nitrogen dioxide gas source 30 enters the exhaust gas analyzer 40 through the second valve 31 and the second three-way valve 33, and outputs a numerical value after conversion, then the second three-way valve 33 connects the zero gas source 20 with the exhaust gas analyzer 40, nitrogen monoxide and nitrogen dioxide in the exhaust gas analyzer 40 are completely discharged by using the zero gas, and the nitrogen dioxide and the zero gas are repeatedly introduced into the exhaust gas analyzer 40 for a plurality of times, and finally the conversion efficiency of the exhaust gas analyzer 40 is calculated according to the obtained numerical value. The device that will provide standard nitric oxide, standard nitrogen dioxide and zero gas for abandonment analysis appearance in this device integrates as an organic whole, makes its various pipelines of the various pipelines of not needing frequent connection/disconnection when the operation, and the holistic leakproofness of device is better, and the operation is more standard, and the rate of accuracy is higher.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A nitrogen oxygen conversion calibration device is characterized in that: the device comprises a nitric oxide source, a first valve connected with the nitric oxide source, a first connecting pipe connected with the first valve, a first three-way valve connected with one end of the first connecting pipe, which is far away from the first valve, a zero gas source, a nitrogen dioxide gas source, a second valve connected with the nitrogen dioxide gas source, a second connecting pipe connected with the second valve, and a second three-way valve connected with one end of the second connecting pipe, which is far away from the second valve;
the first three-way valve with the second three-way valve all is connected with exhaust gas analyzer, zero air supply simultaneously with the first three-way valve with the second three-way valve is connected, first connecting pipe lateral wall is connected with first pressure sensor, second connecting pipe lateral wall is connected with second pressure sensor.
2. The nitrogen-oxygen conversion calibration device according to claim 1, wherein: the nitric oxide gas bag is in conductive connection with the side wall of the first connecting pipe.
3. The nitrogen-oxygen conversion calibration device according to claim 1, characterized in that: the nitrogen dioxide gas bag is in conductive connection with the side wall of the second connecting pipe.
4. The nitrogen-oxygen conversion calibration device according to claim 1, wherein: a first conduit and a second conduit are arranged at the outlet end of the zero gas source, one end of the first conduit, which is far away from the zero gas source, is connected with the first three-way valve, and the first conduit is provided with a third valve;
one end of the second conduit, which is far away from the zero gas source, is connected with the second three-way valve, and the second conduit is provided with a fourth valve.
5. The nitrogen-oxygen conversion calibration device according to claim 1, characterized in that: the first valve, the second valve, the first three-way valve and the second three-way valve are all electromagnetic valves.
6. The nitrogen-oxygen conversion calibration device according to claim 4, wherein: the third valve and the fourth valve are electromagnetic valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221235662.3U CN217787034U (en) | 2022-05-20 | 2022-05-20 | Nitrogen-oxygen conversion calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221235662.3U CN217787034U (en) | 2022-05-20 | 2022-05-20 | Nitrogen-oxygen conversion calibration device |
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| Publication Number | Publication Date |
|---|---|
| CN217787034U true CN217787034U (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221235662.3U Active CN217787034U (en) | 2022-05-20 | 2022-05-20 | Nitrogen-oxygen conversion calibration device |
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| CN (1) | CN217787034U (en) |
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- 2022-05-20 CN CN202221235662.3U patent/CN217787034U/en active Active
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