CN216525444U - Portable integrated motor vehicle tail gas analyzer - Google Patents
Portable integrated motor vehicle tail gas analyzer Download PDFInfo
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- CN216525444U CN216525444U CN202122978595.6U CN202122978595U CN216525444U CN 216525444 U CN216525444 U CN 216525444U CN 202122978595 U CN202122978595 U CN 202122978595U CN 216525444 U CN216525444 U CN 216525444U
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- gas concentration
- concentration detection
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Abstract
The utility model relates to a portable integrated motor vehicle tail gas analyzer, and belongs to the field of gas detection and analysis. A portable integrated motor vehicle exhaust analyzer comprises a sample gas input pipeline, a smoke intensity detection air inlet, a gas concentration detection air inlet, a smoke intensity detection unit and a gas concentration detection unit, wherein the smoke intensity detection unit is communicated with the smoke intensity detection air inlet; the gas concentration detection unit is communicated with the gas concentration detection gas inlet. The smoke intensity detection unit and the gas concentration detection unit are integrated, smoke intensity detection and gas concentration detection can be simultaneously performed on automobile exhaust, gas circulation time is shortened, detection efficiency is improved, the two detections are not interfered with each other, and detection accuracy is improved.
Description
Technical Field
The utility model relates to the field of gas detection and analysis, in particular to a portable integrated motor vehicle tail gas analyzer.
Background
The pollution of mobile sources such as motor vehicles and the like becomes an important source of air pollution in China, serious pollution is brought to the atmospheric environment where human beings live, effective monitoring measures must be taken to monitor the opacity of tail gas of motor vehicles and non-road mobile machinery and various pollutant gases, and a direct basis is provided for environment law enforcement and decision making.
The present market mainly uses light-tight smoke meter product to detect diesel vehicle's opacity degree, detect the tail gas of gasoline vehicle and mainly use automobile exhaust analysis appearance (or monitor) to carry out five gaseous (HC, CO2, O2, NO) concentration detection, these two kinds of equipment are mainly applicable to the detection station, if want to measure motor vehicle exhaust's opacity degree and five component gases, just then just need two kinds of equipment of light-tight smoke meter and automobile exhaust analysis appearance simultaneously and just can realize, especially to the detection of way inspection and non-road removal machinery, be not convenient for carry and influence detection efficiency.
Therefore, in the production of an apparatus for detecting the exhaust gas of diesel vehicles, it is preferred to integrate a five-component gas concentration detection device and an opaque smoke detection device, for example, a patent publication No. CN202101983U found by search discloses a diesel vehicle exhaust gas detector, in which an opaque detector and a gas concentration detection device are sequentially connected through an exhaust gas suction/discharge line SO that the gas passes through the opaque detector to detect the opacity and then passes through the gas concentration detection device to detect the NO and SO of the pollution gas2And the integration of two detection modes is realized. However, the device connects the opacity detection device and the gas concentration detection device in series through a single tail gas suction and discharge pipeline, so that after the gas is introduced into the pipeline, the gas needs to enter the opacity detection device first and then enter the gas concentration detection device, the detection efficiency is reduced, and the subsequent gas concentration detection is possibly influenced by the previous opacity detection process, and the detection result precision is reduced.
SUMMERY OF THE UTILITY MODEL
1. Problems to be solved
Aiming at the problem that the tail gas cannot be simultaneously detected in the prior art, the utility model provides the portable integrated motor vehicle tail gas analyzer, which is integrated by combining the characteristics of two kinds of analysis equipment and fixedly installed by one set of equipment, so that the simultaneous detection of the automobile tail gas opacity and the harmful gas concentration is realized, and the detection efficiency is improved.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
The utility model provides a portable integration motor vehicle exhaust analysis appearance, includes sample gas input pipeline, the sample gas input pipeline has smoke detection air inlet and gas concentration detection air inlet on the way, still includes smoke detection unit, gas concentration detection unit and the control panel of being connected with each detecting element electricity, wherein:
the smoke intensity detection unit is communicated with the smoke intensity detection air inlet;
the gas concentration detection unit is communicated with the gas concentration detection gas inlet.
Preferably, the gas concentration detection unit comprises an electromagnetic directional valve communicated with the gas concentration detection gas inlet, one port of the electromagnetic directional valve is set as a standard gas inlet, and the other port of the electromagnetic directional valve is communicated with a gas concentration detection mechanism; the electromagnetic directional valve and the gas concentration detection mechanism are electrically connected with the control panel.
Preferably, the gas concentration detection mechanism comprises an infrared optical sensor communicated with one end of the electromagnetic directional valve, and the infrared optical sensor is sequentially connected with O2Electrochemical sensors and NO electrochemical sensors; each sensor is electrically connected with the control panel.
Preferably, the smoke intensity detection unit comprises a measurement chamber communicated with the smoke intensity detection air inlet, one end of the measurement chamber is provided with a prism, and the other end of the measurement chamber is provided with a smoke intensity plate; the smoke intensity plate is electrically connected with the control plate.
Preferably, a first fan is arranged at the triple prism and used for forming a first air curtain on the surface of the triple prism; the smoke intensity plate is provided with a second fan which is used for forming a second air curtain on the surface of the smoke intensity plate; the first fan and the second fan are both electrically connected with the control panel.
Preferably, the side wall of the measuring chamber is provided with a measuring chamber wall temperature sensor, the measuring chamber is also internally provided with a flue gas temperature sensor, and the measuring chamber wall temperature sensor and the flue gas temperature sensor are both electrically connected with the control board.
Preferably, the sample gas input pipeline is provided with a filtering mechanism for filtering dust in the gas and realizing flue gas cooling.
Preferably, the filtering mechanism comprises a pre-condensing filter and further comprises a water filter communicated with the pre-condensing filter; the gas concentration detection air inlet is arranged at the air outlet of the water filter, and the smoke intensity detection air inlet is arranged at the air outlet on one side of the preposed condensation filter.
Preferably, the analyzer further comprises an operation unit connected with the control panel and used for controlling the operation and the closing of the analyzer.
Preferably, the operation unit includes a printer and/or a touch screen electrically connected to the control board.
3. Advantageous effects
Compared with the prior art, the utility model has the beneficial effects that:
(1) the smoke intensity detection unit and the gas concentration detection unit are integrated, the smoke intensity and the gas concentration of the automobile exhaust can be detected simultaneously, the gas circulation time is shortened, the detection efficiency is improved, the two detections are not interfered with each other, and the detection accuracy is improved.
(2) The utility model adopts a modular design, although all parts are integrated in the same equipment shell, the parts are mostly communicated by adopting lines, any module is damaged and can be directly replaced, the maintenance is easy, and the maintenance cost is low.
Drawings
FIG. 1 is a connection diagram of the internal structure of a gas concentration detection unit according to the present invention;
FIG. 2 is a diagram illustrating the connection relationship between the interior of a conventional smoke detection unit;
FIG. 3 is a block diagram of the internal connection structure of the data processor of the present invention;
FIG. 4 is a block diagram of the internal connections of the power supply of the present invention;
FIG. 5 is a diagram of the circuit connection according to the present invention;
fig. 6 is a structural diagram of the smoke density detection unit of the present invention.
In the figure:
1. a sample gas input pipeline;
2. a filtering mechanism;
21. a pre-condensing filter; 22. a water filter;
3. a smoke intensity detection unit;
31. a measurement chamber; 311. a measurement channel; 312. a light inlet; 313. a reflected light port; 314. an air inlet;
32. a pyramid prism; 33. a photoelectric conversion panel; 34. a first fan; 35. a second fan;
36. a laser emitting element; 37. a laser receiving element; 38. a collimating lens;
4. a gas concentration detection unit;
41. an electromagnetic directional valve; 42. a standard gas inlet; 43. a gas concentration detection mechanism;
431. an infrared optical sensor; 432. o is2An electrochemical sensor; 433. a NO electrochemical sensor;
5. a control panel;
6. a printer;
7. a touch screen;
8. a smoke detection air inlet; 9. a gas concentration detection inlet.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the embodiment.
As shown in fig. 5, a portable integrated motor vehicle exhaust analyzer is mainly composed of an air intake system, a smoke intensity detection unit 3 and a gas concentration detection unit 4, wherein the unit systems are controlled by a control board 5 and are powered by the same power supply system, and the power supply system also supplies power to the control board 5. Wherein the smoke intensity detection sheetAnd the unit 3 is mainly used for detecting the smoke intensity of the tail gas sampling gas. The gas concentration detection unit 4 mainly detects HC (hydrocarbon), CO (carbon monoxide), and CO in the exhaust gas sample gas2(carbon dioxide), O2(oxygen) and NO (nitric oxide).
The air inlet system mainly comprises a sample gas input pipeline 1 and a filtering mechanism arranged on the sample gas input pipeline 1. The filtering mechanism 2 comprises a preposed condensing filter 21 arranged at the initial end of the sample gas input pipeline 1 and is used for filtering dust in tail gas, cooling the flue gas and preventing the gas entering the analysis optical platform from generating condensed water; the preposed condensing filter 21 is communicated with a water filter 22, and the water filter 22 separates oil and water in the sample gas to be measured and filters out dust; the water filter 22 and the condensing filter 21 are both communicated with the air pump, thereby discharging the moisture. Wherein the gas concentration detection inlet 9 is arranged at the gas outlet of the water filter 22, and the smoke intensity detection inlet 8 is arranged at the gas outlet on one side of the preposed condensing filter 21. With this realization through appearance gas input pipeline 1 suction tail gas, again with leading-in smoke intensity detecting element 3 and gas concentration detecting element 4 simultaneously of tail gas to the smoke intensity and the component gas concentration of simultaneous detection tail gas have promoted detection efficiency greatly.
As shown in fig. 1 and 5, the gas concentration detecting unit 4 is mainly used for detecting five-component gas, and includes an electromagnetic directional valve 41 communicated with the gas concentration detecting gas inlet 9 for switching between zero gas and sampling gas, wherein the electromagnetic directional valve 41 may be a three-way electromagnetic valve. One end of the electromagnetic directional valve 41 is provided with a standard gas inlet 42 for adjusting the zero value of the gas concentration detection mechanism 43, and a zero gas filter is arranged behind the standard gas inlet 42 and used for removing dust in air; the other end of the electromagnetic directional valve 41 is communicated with a gas concentration detection mechanism 43, the gas concentration detection mechanism 43 comprises an infrared optical sensor 431 communicated with one end of the electromagnetic directional valve 41, and the infrared optical sensor 431 is sequentially connected with O2Electrochemical sensor 432 and NO electrochemical sensor 433; besides, a second air pump is arranged behind the electromagnetic directional valve 41, and a calibration air interface is arranged. Wherein the infrared optical sensor 431 is used for real-time measurement of CO and CO2And concentration of HC, NO electrochemistrySensor 433 for measuring the concentration of NO, O2Electrochemical sensor 432 for measuring O2Wherein the infrared optical sensor 431 adopts the principle of non-spectroscopic infrared absorption method, after the infrared radiation emitted from the infrared light source is absorbed by the gas to be measured with a certain concentration, the spectral intensity in direct proportion to the gas concentration will change, so that the concentration of the gas to be measured can be inverted by obtaining the variation of the spectral intensity. The air inlet end of the infrared optical sensor 431 is also connected with a calibration air interface. The control panel 5 controls the air pump 24 to be switched with standard air (standard air) through the electromagnetic directional valve 41.
The smoke detection measures the smoke value of the tail gas by utilizing the principle that the tail gas absorbs light mainly according to the Lambert-beer law, and comprises the following steps: the light absorption coefficient K value and the light absorption ratio N value. The optical channel length is specified by JJG 976-. As shown in fig. 2, a conventional smoke intensity detecting device is generally provided with a laser transmitter at one end of a detecting channel and a laser receiver at the other end of the detecting channel, so that the length of the detecting channel is limited, and the standard length of 0.430m is still inconvenient for the whole device to carry about, and therefore, the utility model is further improved as follows:
as shown in fig. 5 and 6, the main body of the smoke density detection unit 3 is a measurement chamber 31 communicating with the smoke density detection intake port 8, and the pre-condensation filter 21 is separated from the other exhaust port on the basis of the above-described device, and led to the measurement chamber 31 having a cavity structure. The measurement chamber 31 is provided with a measurement channel 311 for gas circulation and laser reciprocation, the measurement channel 311 is provided with a light inlet 312 and a reflected light inlet 313, the side wall of the measurement chamber 31 is provided with a gas inlet 314 communicated with the measurement channel, one end of the measurement chamber 31 provided with the light inlet 312 is provided with a photoelectric conversion plate 33, the photoelectric conversion plate 33 is a smoke intensity plate in the prior art, and accessories contained in the device refer to the description of the prior art and are not repeated herein; the photoelectric conversion plate 33 is provided with a laser emitting element 36 and a laser receiving element 37, and the photoelectric conversion plate 33 is used for transmitting or converting electric signals for the laser emitting element 36 and the laser receiving element 37; a collimator lens 38 is provided between the photoelectric conversion plate 33 and the end of the measurement chamber 31 to refract the laser light emitted from the laser emitting element 36 into a parallel beam passing through the measurement channel 311; one end of the measuring chamber 31, which is provided with the reflected light port 313, is provided with a reflecting element for reflecting the laser light emitted by the laser emitting element 36 back to the laser receiving element 37, and the reflecting element can be a pyramid prism 32, and can be a prism specifically; the laser emitting element 36 and the laser receiving element 37 are electrically connected to the control board 5.
The scheme is further improved, a first fan 34 is arranged between the corner cube 32 and the measuring chamber 31, and therefore a first air curtain is formed by the air curtain formed by air blowing of the first fan; a second fan 35 is provided between the photoelectric conversion panel 33 and the measurement chamber 31, thereby forming a second air curtain; the first fan 34 and the second fan 35 are both in control connection with the control board 5. The formation of the air curtain avoids the nearby lens from being contaminated by soot particles and influencing the measurement result. The photoelectric conversion plate 33 is connected with a smoke intensity sampling circuit in the control plate 5. The measuring chamber 31 is provided with a temperature sensor, mainly a measuring chamber wall temperature sensor which is arranged on the side wall and connected with the control panel 33 and used for monitoring the temperature of the measuring chamber, and a flue gas temperature sensor which is arranged in the measuring chamber 31 and connected with the control panel 33 and used for measuring the temperature of the flue gas; the measuring chamber 31 is also provided with a heater electrically connected with the control board 33, and the heater is used for heating the measuring chamber 31 to keep the temperature of the measuring chamber above 70 ℃, so that the water vapor in the tail gas is prevented from being condensed into fog to influence the measuring result.
The technical scheme utilizes the reflection principle of laser, shortens the lengths of the measuring chamber and the measuring channel on the premise of meeting the national standard, reduces the volume of the device, and is beneficial to the integration and carrying of the device.
As shown in fig. 3 and 5, the control board 5 includes a data processing board, and a solenoid valve assembly connected to the data processing board. The solenoid valve set is used for controlling the start and stop of the air pump 24. And the data processing board is also connected with a touch screen 7 for controlling the data processing board by personnel. The data processing board is also connected to a printer 6 for printing the analysis report generated by the data processor. And the data processing board is also connected with a 4G or 5G communication module for dynamically transmitting the analysis to the remote corollary equipment. The data processing board is also connected with a rotating speed sensor which is used for being installed on the tested automobile and monitoring the running speed of the automobile engine in real time. The data processing board is also connected with an oil temperature sampling circuit, and an oil temperature sensor connected with the oil temperature sampling circuit is used for monitoring the real-time oil temperature of the automobile. The data processing board is also connected with an environment temperature and humidity sampling circuit, and the temperature sensor and the humidity sensor which are connected with the data processing board are used for monitoring the environment temperature.
As shown in fig. 4, the power supply system includes an AC/DC charger, which is connected to a 12V lithium battery, and the 12V lithium battery is connected to a voltage sampling and power supply circuit serial port on the data processing board to implement power supply control.
The working principle of the utility model is as follows: in the smoke intensity detection unit 3, a sampling probe is connected to the measurement chamber 31 through a sampling tube, receives the exhaust gas discharged from the pre-condensation filter 21, and then introduces the exhaust gas into the measurement chamber 31. The photoelectric conversion plate 33 emits a light source to pass through the measuring chamber 31, the light source is refracted by the corner cube prism 32 and then reflected to a photoelectric receiving circuit board of the photoelectric conversion plate 33 in parallel, the receiving result is converted into an analog data signal to be transmitted to a smoke intensity sampling circuit for processing, the processing result is printed by a printer 6 controlled by a data processor, and meanwhile, the touch screen 7 displays the processing result.
In the gas concentration detection unit 4, the tail gas sampling gas passes through the preposed condensing filter 21, the preposed condensing filter 21 filters dust in the tail gas, and the flue gas is cooled to prevent the gas entering the analysis optical platform from generating condensed water. Then, the water filter 22 separates oil and water in the sample gas to be measured, and filters off dust. The air pump 24 is used to discharge the moisture in the pre-condensation filter 21 and the water filter 22. The air filter 23 is used to filter dust in the air. The electromagnetic directional valve 41 is used for switching between zero gas and sampling gas. Infrared optical sensor 431 measures CO and CO in real time2And HC concentration, NO electrochemical sensor 433 measures the concentration of NO, O2Electrochemical sensor 432 measures O2The concentration of (c). The final detection result is printed by a printer 6 controlled by the data processor and displayed by a touch screen 7.
In this patent, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which shall fall within the scope of the claimed invention. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a portable integration motor vehicle exhaust analysis appearance, includes sample gas input pipeline (1), its characterized in that, it detects air inlet (8) and gas concentration detection air inlet (9) to have the smoke intensity on sample gas input pipeline (1), still includes smoke intensity detecting element (3), gas concentration detecting element (4) and control panel (5) of being connected with each detecting element electricity, wherein:
the smoke intensity detection unit (3) is communicated with the smoke intensity detection air inlet (8);
the gas concentration detection unit (4) is communicated with the gas concentration detection gas inlet (9).
2. The portable integrated automobile exhaust analyzer according to claim 1, wherein the gas concentration detection unit (4) comprises an electromagnetic directional valve (41) communicated with the gas concentration detection inlet (9), one port of the electromagnetic directional valve (41) is set as a standard gas inlet (42), and the other port is communicated with a gas concentration detection mechanism (43); the electromagnetic directional valve (41) and the gas concentration detection mechanism (43) are electrically connected with the control panel (5).
3. A method as claimed in claim 2The portable integrated motor vehicle exhaust gas analyzer is characterized in that the gas concentration detection mechanism (43) comprises an infrared optical sensor (431) communicated with one end of the electromagnetic directional valve (41), and the infrared optical sensor (431) is sequentially connected with O2An electrochemical sensor (432) and a NO electrochemical sensor (433); each sensor is electrically connected with the control board (5).
4. The portable integrated automobile exhaust gas analyzer according to claim 1, wherein the smoke intensity detection unit (3) comprises a measurement chamber (31) communicated with the smoke intensity detection air inlet (8), one end of the measurement chamber (31) is provided with a triangular prism (32), and the other end is provided with a smoke intensity plate (33); the smoke intensity plate (33) is electrically connected with the control plate (5).
5. The portable integrated automobile exhaust gas analyzer according to claim 4, wherein a first fan (34) is disposed at the triangular prism (32) for forming a first air curtain on the surface of the triangular prism (32); a second fan (35) is arranged at the smoke intensity plate (33) and is used for forming a second air curtain on the surface of the smoke intensity plate (33); the first fan (34) and the second fan (35) are both electrically connected with the control board (5).
6. The portable integrated automobile exhaust gas analyzer according to claim 4, wherein a measuring chamber wall temperature sensor is arranged on the side wall of the measuring chamber (31), a flue gas temperature sensor is further arranged in the measuring chamber (31), and the measuring chamber wall temperature sensor and the flue gas temperature sensor are both electrically connected with the control board (5).
7. The portable integrated automobile exhaust gas analyzer according to claim 1, wherein the sample gas input pipeline (1) is provided with a filtering mechanism (2) for filtering dust in gas and realizing flue gas cooling.
8. The portable integrated motor vehicle exhaust gas analyzer according to claim 7, wherein the filter mechanism (2) comprises a pre-condenser filter (21), and further comprises a water filter (22) in communication with the pre-condenser filter (21); the gas concentration detection gas inlet (9) is arranged at the gas outlet of the water filter (22), and the smoke intensity detection gas inlet (8) is arranged at the gas outlet on one side of the preposed condensation filter (21).
9. The portable integrated automobile exhaust gas analyzer according to claim 1, further comprising an operation unit electrically connected to the control board (5) for operating the analyzer to operate and shut down.
10. The portable integrated motor vehicle exhaust gas analyzer according to claim 9, wherein the operating unit comprises a printer (6) and/or a touch screen (7) electrically connected to the control board (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978595.6U CN216525444U (en) | 2021-11-26 | 2021-11-26 | Portable integrated motor vehicle tail gas analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978595.6U CN216525444U (en) | 2021-11-26 | 2021-11-26 | Portable integrated motor vehicle tail gas analyzer |
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| Publication Number | Publication Date |
|---|---|
| CN216525444U true CN216525444U (en) | 2022-05-13 |
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ID=81464778
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122978595.6U Active CN216525444U (en) | 2021-11-26 | 2021-11-26 | Portable integrated motor vehicle tail gas analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216525444U (en) |
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2021
- 2021-11-26 CN CN202122978595.6U patent/CN216525444U/en active Active
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