CN214894064U - Engine exhaust gas analyzer accuracy detection device - Google Patents
Engine exhaust gas analyzer accuracy detection device Download PDFInfo
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- CN214894064U CN214894064U CN202120748314.5U CN202120748314U CN214894064U CN 214894064 U CN214894064 U CN 214894064U CN 202120748314 U CN202120748314 U CN 202120748314U CN 214894064 U CN214894064 U CN 214894064U
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Abstract
The utility model provides an engine tail gas analysis appearance accuracy detection device, including airtight gas pitcher for the standard gas of certain concentration of storage and pressure, be connected with the detection pipeline on the airtight gas pitcher, the detection pipeline is used for directly adopting the sample connection with engine tail gas analysis appearance. The utility model discloses a save standard gas in the airtight gas jar to be connected airtight gas jar and the straight sampling mouth of adopting of analysis appearance, the gas that can guarantee to get into the analysis appearance is whole standard gas, need not the personal air-vent valve aperture of adjusting, does not have danger, and can not lead to the analysis appearance to have the leakage problem to discover because of gas pressure is too big.
Description
Technical Field
The utility model relates to an engine exhaust detects the technique, especially relates to an engine exhaust analysis appearance accuracy detection device.
Background
In the current engine bench test, a direct sampling gas analyzer is used for detecting the tail gas of the engine. Although the linearization is checked periodically during the gas analyzer and the calibration is performed by using standard gas, the gas analyzer may have faults and gas leakage, which may result in incorrect measurement results. Because the standard gas does not pass through the sampling pipe and the pre-filter no matter linear or standard gas calibration is carried out, and the pressure of the standard gas is 1bar-1.5bar, even if the gas analyzer has the condition of leakage caused by untight sealing at a certain position, the situation can not be found. At present, a bottle of standard gas is generally used, and is connected with a three-way pipe after being regulated by a pressure regulating valve, one path of gas is sent into a sampling port, and the concentration of the measured gas is compared with the concentration of the standard gas after being detected by an analyzer. If the difference is within 2%, it indicates that the analyzer is not a problem. In the mode, the opening of the pressure regulating valve needs to be manually regulated to a proper position, so that light gas flows out from the other path of the three-way pipe, and the fact that the gas is completely standard gas extracted by the analyzer can be guaranteed. However, most of the used standard gases are flammable and harmful gases, so that potential safety hazards exist, and the standard gas pressure at the outlet of the tee joint cannot be standardized by the feeling of individuals. Furthermore, the standard gas pressure is high, and cannot be detected in this way if the analyzer has a leak.
Disclosure of Invention
An object of the utility model is to provide a safer, accurate engine exhaust analysis appearance accuracy detection device.
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
According to the utility model discloses an aspect provides an engine tail gas analysis appearance accuracy detection device, including airtight gas pitcher for the standard gas of certain concentration of storage and pressure, be connected with the detection pipeline on the airtight gas pitcher, the detection pipeline is used for directly adopting the sample connection with engine tail gas analysis appearance.
In one embodiment, a first valve is arranged on the detection pipeline of the accuracy detection device of the engine exhaust gas analyzer.
In an embodiment, an inflation pipeline is connected to the closed gas tank of the device for detecting the accuracy of the engine exhaust analyzer, the inflation pipeline is used for being connected with a standard gas cylinder, and a second valve is arranged on the inflation pipeline.
In an embodiment, the closed gas tank of the device for detecting the accuracy of the engine exhaust analyzer is connected with an air pumping pipeline, the air pumping pipeline is connected with a vacuum pump, and a third valve is arranged on the air pumping pipeline.
In an embodiment, the first valve, the second valve and the third valve of the device for detecting accuracy of an engine exhaust gas analyzer are all solenoid valves.
In an embodiment, the first valve, the second valve, the third valve and the vacuum pump of the device for detecting the accuracy of the engine exhaust analyzer are electrically connected with a control panel.
In one embodiment, a pressure sensor is connected to the closed gas tank of the device for detecting the accuracy of the engine exhaust gas analyzer.
In one embodiment, the pressure sensor of the accuracy detection device of the engine exhaust gas analyzer is electrically connected with the control panel.
In one embodiment, the pressure of the standard gas in the closed gas tank of the device for detecting the accuracy of the engine exhaust gas analyzer is 101.3 kpa.
In one embodiment, a vacuum gauge is connected to the closed gas tank of the device for detecting the accuracy of the engine exhaust gas analyzer.
The embodiment of the utility model provides a beneficial effect is: through saving standard gas in the airtight gas jar to directly adopting the sample connection with airtight gas jar and analysis appearance, can guarantee that the gas that gets into the analysis appearance is all standard gas, need not individual regulation air-vent valve aperture, there is not danger, and gas pressure can not too big and lead to the analysis appearance to have the leakage problem to discover.
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.
The above features and advantages of the present invention will be better understood upon reading the detailed description of embodiments of the present disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.
Fig. 1 is a schematic diagram of a connection relationship according to an embodiment of the present invention;
wherein: 1-a control panel; 2-a vacuum pump; 3-sealing the gas tank; 4-standard gas cylinder; 5-a pressure sensor; 7-a vacuum gauge; 8-detecting the pipeline; 81-a first valve; 9-an inflation pipeline; 91-a second valve; 10-an air extraction pipeline; 11-third valve.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be understood as imposing any limitation on the scope of the present invention.
As shown in fig. 1, the embodiment of the utility model provides an engine exhaust analysis appearance accuracy detection device, including airtight gas pitcher 3, this airtight gas pitcher 3 is used for saving the standard gas of certain concentration and pressure. The closed gas tank 3 is connected with a detection pipeline 8, and the detection pipeline 8 is used for being connected with a direct sampling port of an engine tail gas analyzer.
When the tail gas analyzer is required to be detected, the detection pipeline 8 is connected to a direct sampling port of the tail gas analyzer, the tail gas analyzer samples, after 1 minute is stable, the concentration displayed on a display of the tail gas analyzer and the concentration of the standard gas in the sealed gas tank 3 are compared, and if the difference between the concentration measured by the tail gas analyzer and the concentration of the standard gas in the sealed gas tank 3 is not more than 2%, the tail gas analyzer is free of problems. If the difference between the concentration measured by the tail gas analyzer and the concentration of the gas filled in the closed gas tank 3 is more than 2%, the tail gas analyzer has problems and needs to be checked step by step.
In a possible embodiment, the detection line 8 is provided with a first valve 81 to facilitate the on-off control of the detection line 8.
In order to facilitate the filling of the sealed gas tank 3 with the standard gas, in a possible embodiment, a gas filling line 9 is connected to the sealed gas tank 3, the gas filling line 9 is used for connecting with the standard gas cylinder 4, and the standard gas cylinder 4 can be replaced after use. The second valve 91 is arranged on the charging pipeline 9. In addition, an air extraction pipeline 10 is connected to the closed air tank 3, the air extraction pipeline 10 is connected to the vacuum pump 2, and a third valve 11 is arranged on the air extraction pipeline 10.
In a possible embodiment, the first valve 81, the second valve 91 and the third valve 11 may be all solenoid valves, and the first valve 81, the second valve 91, the third valve 11 and the vacuum pump 2 may be all electrically connected to the control panel 1 so as to be conveniently controlled. The sealed air tank 3 is connected with a pressure sensor 5. The pressure sensor 5 is electrically connected to the control panel 1. Preferably, the pressure of the standard gas in the closed gas tank 3 is maintained at 101.3kpa, so that when the exhaust gas analyzer has a leakage problem, it can be found in time.
When it is necessary to fill the standard gas into the airtight gas tank 3, it is necessary to first evacuate the air in the airtight gas tank 3 and evacuate the airtight gas tank 3. The third valve 11 is controlled to open by a button on the control panel 1, and the vacuum pump 2 is informed to operate. When the pressure sensor 5 detects that the absolute pressure in the tank is less than 0.1kpa, it is considered that the vacuum state is achieved in the sealed gas tank 3, and the third valve 11 and the vacuum pump 2 are automatically closed. The second valve 91 is opened to fill the airtight gas tank 3 with standard gas. When the pressure sensor 5 detects that the absolute pressure is 101.3kpa, the second valve 91 is automatically closed, and the standard gas is stopped from being continuously filled.
It is easily understood that a vacuum gauge 7 may also be connected to the airtight gas tank 3 to detect the degree of vacuum.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The above description is only a preferred example of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.
Claims (10)
1. The utility model provides an engine exhaust analysis appearance accuracy detection device which characterized in that: the device comprises a closed gas tank for storing standard gas with certain concentration and pressure, wherein the closed gas tank is connected with a detection pipeline, and the detection pipeline is used for being connected with a direct sampling port of an engine tail gas analyzer.
2. The engine exhaust gas analyzer accuracy detection device according to claim 1, characterized in that: and a first valve is arranged on the detection pipeline.
3. The engine exhaust gas analyzer accuracy detection device according to claim 2, characterized in that: the sealed gas tank is connected with an inflation pipeline, the inflation pipeline is used for being connected with a standard gas bottle, and a second valve is arranged on the inflation pipeline.
4. The engine exhaust gas analyzer accuracy detection device according to claim 3, characterized in that: and the closed gas tank is connected with a gas extraction pipeline, the gas extraction pipeline is connected with a vacuum pump, and a third valve is arranged on the gas extraction pipeline.
5. The engine exhaust gas analyzer accuracy detection device according to claim 4, characterized in that: the first valve, the second valve and the third valve are all electromagnetic valves.
6. The engine exhaust gas analyzer accuracy detection device according to claim 5, characterized in that: and the first valve, the second valve, the third valve and the vacuum pump are all electrically connected with the control panel.
7. The engine exhaust gas analyzer accuracy detection device according to claim 6, characterized in that: and the closed gas tank is connected with a pressure sensor.
8. The engine exhaust gas analyzer accuracy detection device according to claim 7, characterized in that: the pressure sensor is electrically connected with the control panel.
9. The engine exhaust gas analyzer accuracy detection device according to claim 7, characterized in that: the pressure of the standard gas in the closed gas tank is 101.3 kpa.
10. The engine exhaust gas analyzer accuracy detection device according to claim 4, characterized in that: and the sealed gas tank is connected with a vacuum gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120748314.5U CN214894064U (en) | 2021-04-13 | 2021-04-13 | Engine exhaust gas analyzer accuracy detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120748314.5U CN214894064U (en) | 2021-04-13 | 2021-04-13 | Engine exhaust gas analyzer accuracy detection device |
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| CN214894064U true CN214894064U (en) | 2021-11-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114624031A (en) * | 2022-03-14 | 2022-06-14 | 中公高远(北京)汽车检测技术有限公司 | Standard device and method for comparing automobile emission tests |
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2021
- 2021-04-13 CN CN202120748314.5U patent/CN214894064U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114624031A (en) * | 2022-03-14 | 2022-06-14 | 中公高远(北京)汽车检测技术有限公司 | Standard device and method for comparing automobile emission tests |
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