CN217655090U - Diesel vehicle exhaust gas detection device - Google Patents
Diesel vehicle exhaust gas detection device Download PDFInfo
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- CN217655090U CN217655090U CN202221554926.1U CN202221554926U CN217655090U CN 217655090 U CN217655090 U CN 217655090U CN 202221554926 U CN202221554926 U CN 202221554926U CN 217655090 U CN217655090 U CN 217655090U
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Abstract
The invention discloses a diesel automobile tail gas detection device which comprises an air inlet pipeline, wherein a smoke intensity detection unit is arranged on the air inlet pipeline, a drying unit is connected with the outlet end of a smoke intensity detection chamber, the drying unit comprises a drying chamber and an exchange membrane channel, the exchange membrane channel is arranged in the drying chamber, the inlet end of the exchange membrane channel is connected with the outlet end of the smoke intensity detection chamber, a nitric oxide sensor, a sulfur dioxide sensor and a carbon monoxide sensor are arranged in an air outlet pipeline, the flowing direction of air in the drying chamber is opposite to the flowing direction of air in the exchange membrane channel, and the nitric oxide sensor, the sulfur dioxide sensor and the carbon monoxide sensor are electrically connected with a control terminal. The utility model discloses added the gas drying unit in tail gas detection device, gas after the particulate matter filters flows in gaseous detecting element, avoids a large amount of moisture that contain among the automobile exhaust to influence the accuracy of gaseous detection.
Description
Technical Field
The utility model belongs to the technical field of the oil gas detects, a diesel vehicle tail gas detection device is related to.
Background
Diesel oil is a light petroleum product, a complex hydrocarbon (with about 10-22 carbon atoms) mixture, is diesel fuel, is mainly prepared by blending diesel fractions produced in the processes of crude oil distillation, catalytic cracking, thermal cracking, hydrocracking, petroleum coking and the like, can also be prepared by processing shale oil and coal liquefaction, and is divided into two main categories, namely light diesel oil (with the boiling point range of about 180-370 ℃) and heavy diesel oil (with the boiling point range of about 350-410 ℃). It is widely used for large vehicles, railway locomotives and ships. It can be seen that diesel oil is one of the main sources of energy for transportation facilities, and especially in cities, the exhaust gas emitted from diesel oil type automobiles is a large air pollution source.
Detecting and analyzing diesel type automobile exhaust is the basis of carrying out pertinence prevention and control pollution to the air, current tail gas detects and analytical equipment, adopt filter paper to detect automobile exhaust and discharge, detect through the black cigarette that persists on filter paper and draw the smoke intensity, but discharge a large amount of steam that contains in the tail gas among the diesel vehicle, a large amount of steam can get into current tail gas detection and analytical equipment liquefaction into the liquid drop with the gas such as nitrogen dioxide, sulfur dioxide that the diesel combustion produced, will influence the accuracy of analysis result, so need follow-up before detecting the polluted gases such as sulphur, nitrogen dispel steam.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a diesel vehicle tail gas detection device has solved the problem of proposing among the above-mentioned background art.
The utility model discloses a technical scheme is, a diesel vehicle tail gas detection device, include:
an air intake duct;
a smoke intensity detection unit arranged on the air inlet pipeline,
the smoke intensity detection unit comprises a smoke intensity detection chamber, and filter paper is arranged in the vertical direction of the smoke intensity detection chamber;
a drying sheet connected with the outlet end of the smoke intensity detection chamber,
the drying unit comprises a drying chamber and an exchange membrane channel, the exchange membrane channel is arranged in the drying chamber, and the inlet end of the exchange membrane channel is connected with the outlet end of the smoke intensity detection chamber;
the exchange membrane channel comprises an exchange membrane support frame, two ends of the exchange membrane support frame are fixedly connected with the inner wall of the drying chamber, the exchange membrane support frame is coated with a proton exchange membrane,
the side wall of the drying chamber is provided with a drying air inlet pipe and a drying air outlet pipe, and the flowing direction of air in the drying chamber is opposite to the flowing direction of air in the exchange membrane channel;
the gas outlet pipeline is connected with the outlet end of the exchange membrane channel, the inlet end of the gas outlet pipeline is provided with a valve, the gas outlet pipeline is internally provided with a nitric oxide sensor, a sulfur dioxide sensor and a carbon monoxide sensor, and the nitric oxide sensor, the sulfur dioxide sensor and the carbon monoxide sensor are electrically connected with a control terminal.
The utility model discloses a characteristics still lie in:
two filter paper rotating shafts are arranged in the smoke intensity detection chamber, two ends of the filter paper are wound on the filter paper rotating shafts, the filter paper rotating shafts rotate in the same direction to drive the filter paper, and the filter paper penetrates through the smoke intensity detection chamber in a mode of cutting off the flowing direction of gas.
The drying chamber is provided with a spiral flow guide frame, the spiral flow guide frame is arranged around the proton exchange membrane, and the spiral flow guide frame guides the gas in the drying chamber to flow in the spiral direction in the drying chamber.
A return pipeline is arranged between the air inlet pipeline and the air outlet pipeline.
The inlet end of the air outlet pipeline is provided with a humidity sensor which is electrically connected with the control terminal.
The valve is an electric control valve and is electrically connected with the control terminal.
An air pump is arranged on the return pipeline.
An electric control valve is arranged on the return pipeline.
The beneficial effects of the utility model are that:
1. the utility model discloses gas drying unit has been added in tail gas detection device, gas after the particulate matter filters, flow in gas detection unit, avoid a large amount of moisture that contains among the automobile exhaust to influence the accuracy that gaseous detected, and still be equipped with backflow pipeline at whole device, humidity through the tail gas that detects the play drying chamber, judge whether dry thoroughly of tail gas, if still have moisture, it carries out the secondary drying to flow back to the drying chamber, gaseous reaching predetermines drying standard after the drying, just carry out next link, guarantee the effect to tail gas drying with this.
2. The utility model arranges the spiral flow guiding frame in the drying chamber, the drying gas flows along the spiral direction, so that the reverse drying gas flow uniformly passes through the proton exchange membrane, and the flow velocity of the contact position of the drying gas and the proton exchange membrane is increased; the spiral diversion frame increases the effective length of back blowing and increases the retention time of back blowing.
Drawings
FIG. 1 is a schematic structural view of a diesel vehicle exhaust gas detection device of the present invention;
FIG. 2 is a cross-sectional view of the diesel vehicle exhaust gas detection device of the present invention;
in the figure, 1, an air inlet pipeline, 2, a smoke degree detection unit, 3, filter paper, 4, a drying unit, 5, an air outlet pipeline, 6, a nitric oxide sensor, 7, a sulfur dioxide sensor, 8, a carbon monoxide sensor, 9, a control terminal, 10, a backflow pipeline, 11, a humidity sensor, 12, an air pump, 13, an electric control valve, 2-1, a smoke degree detection chamber, 2-2, a filter paper rotating shaft, 4-1, a drying chamber, 4-2, an exchange membrane channel, 4-3, an exchange membrane support frame, 4-4, a proton exchange membrane, 4-5, 4-6, a drying air inlet pipe, 4-7, a drying air outlet pipe and 4-8, a spiral diversion frame.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a diesel oil automobile exhaust detection device, as shown in figure 1, 2, including admission line 1, be provided with smoke intensity detecting element 2 on admission line 1, smoke intensity detecting element 2 is including smoke intensity detecting chamber 2-1, the vertical direction of smoke intensity detecting chamber 2-1 is provided with filter paper 3, separate two spaces with the baffle in smoke intensity detecting chamber 2-1, be provided with filter paper pivot 2-2 in this space, 3 both ends of filter paper are around rolling up on filter paper pivot 2-2, filter paper pivot 2-2 can connect the motor, control terminal 9 control motor work, the automatic filter paper that filters the detection gas body usefulness of changing, filter paper pivot 2-2 syntropy rotates and drives the filter paper, the filter paper runs through smoke intensity detecting chamber 2-1 setting with the mode of cutting the gas flow direction, control terminal 9 selects the computer.
The smoke of the drying unit 4 is connected with the outlet end of the smoke intensity detection chamber 2, solid particles of gas to be detected are filtered out through the smoke intensity detection chamber 2-1, and the gas enters the drying unit 4 to remove water vapor contained in the gas.
The drying unit 4 comprises a drying chamber 4-1 and an exchange membrane channel 4-2, the exchange membrane channel 4-2 is arranged in the drying chamber 4-1, and the inlet end of the exchange membrane channel 4-2 is connected with the outlet end of the smoke intensity detection chamber 2;
the exchange membrane channel comprises an exchange membrane support frame 4-3, two ends of the exchange membrane support frame 4-3 are fixedly connected to the inner wall of the drying chamber 4-1, the exchange membrane support frame 4-3 is coated with a proton exchange membrane 4-4, and the exchange membrane support frame 4-3 is preferably made of stainless steel and PTFE materials. The proton exchange membrane 4-4 is a soft material, and can be a copolymer film material of polytetrafluoroethylene and perfluoro-3, 6-diepoxy-4-methyl-7-decene-sulfuric acid. The drying chamber 4-1 is provided with a spiral flow guide frame 4-8, the spiral flow guide frame 4-8 is arranged around the proton exchange membrane 4-4, and the spiral flow guide frame 4-8 guides the gas in the drying chamber 4-1 to flow in the spiral direction in the drying chamber 4-1.
The proton exchange membrane 4-4 is clamped and fixed by the exchange membrane support frame 4-3 and the spiral diversion frame 303 so as to avoid the proton exchange membrane 4-4 from collapsing, being adhered or excessively expanding to influence the sample gas flow and the adsorption of the sample.
The side wall of the drying chamber 4-1 is provided with a drying air inlet pipe 4-6 and a drying air outlet pipe 4-7, the flowing direction of the gas in the drying chamber 4-1 is opposite to the flowing direction of the gas in the exchange membrane channel 4-2, the drying chamber 4-1 is continuously filled with the drying gas, the gas to be detected exchanges water vapor with the spirally flowing drying gas through the proton exchange membrane, and the gas to be detected enters the air outlet pipeline 5 after the exchange.
The air outlet pipeline 5 is connected with the outlet end of the exchange membrane channel 4-2, the inlet end of the air outlet pipeline 5 is provided with a valve 4-5, the valve is an electric control valve 4-5 and is electrically connected with a control terminal 9, the inlet end of the air outlet pipeline 5 is provided with a humidity sensor 11, and the humidity sensor 11 is arranged on the inner side of the valve 4-5. Be provided with nitric oxide sensor 6, sulfur dioxide sensor 7 and carbon monoxide sensor 8 in the pipeline 5 of giving vent to anger, nitric oxide sensor 6, sulfur dioxide sensor 7 and carbon monoxide sensor 8 electric connection control terminal 9, carbon monoxide sensor 8, nitric oxide sensor 6, sulfur dioxide sensor 7 set up in the valve 4-5 outside. Humidity sensor 11 detects the humidity of the gas that awaits measuring after the drying, and the humidity value that detects compares with the humidity value that sets for in advance in control terminal 9, is less than this value, and control terminal 9 opens valve 4-5, and the gas that awaits measuring passes through carbon monoxide sensor 8, nitrogen monoxide sensor 6, sulfur dioxide sensor 7, has three sensor survey wherein gas concentration and uploads control terminal 9.
A backflow pipeline 10 is arranged between the air inlet pipeline 1 and the air outlet pipeline 5, an air pump 12 is arranged on the backflow pipeline 10, and an electric control valve 13 is arranged on the backflow pipeline 10. If the value is larger than the preset value, the control terminal 9 opens the air pump 12 and the electric control valve 13, so that the gas to be detected enters the air inlet pipeline 1 through the backflow pipeline 10 and enters the drying unit 4 again for drying.
The utility model relates to a diesel vehicle tail gas detection device, its beneficial effect lies in: the utility model discloses gas drying unit has been added in tail gas detection device, gas after the particulate matter filters, flow in gas detection unit, avoid a large amount of moisture that contains among the automobile exhaust to influence the accuracy of gaseous detection, and still be equipped with backflow pipeline at whole device, humidity through the tail gas that detects the play drying chamber, judge whether dry thoroughly of tail gas, if still have moisture, the backflow is carried out the secondary drying in the drying chamber, gaseous reaching the predetermined drying standard after the drying, just carry out next link, guarantee the effect to tail gas drying with this. The utility model arranges a spiral flow guiding frame in the drying chamber, and the drying gas flows along the spiral direction, so that the reverse drying airflow uniformly passes through the proton exchange membrane, and the flow velocity of the contact position of the drying gas and the proton exchange membrane is increased; the spiral diversion frame increases the effective length of back blowing and increases the retention time of back blowing.
Claims (8)
1. A diesel vehicle exhaust detection device, characterized by, includes:
an air intake duct (1);
a smoke intensity detection unit (2) arranged on the air inlet pipeline (1),
the smoke intensity detection unit (2) comprises a smoke intensity detection chamber (2-1), and filter paper (3) is arranged in the vertical direction of the smoke intensity detection chamber (2-1);
a drying unit (4) connected with the outlet end of the smoke intensity detection unit (2),
the drying unit (4) comprises a drying chamber (4-1) and an exchange membrane channel (4-2), the exchange membrane channel (4-2) is arranged in the drying chamber (4-1), and the inlet end of the exchange membrane channel (4-2) is connected with the outlet end of the smoke intensity detection chamber (2-1);
the exchange membrane channel comprises an exchange membrane support frame (4-3), two ends of the exchange membrane support frame (4-3) are fixedly connected with the inner wall of the drying chamber (4-1), the exchange membrane support frame (4-3) is coated with a proton exchange membrane (4-4),
a drying air inlet pipe (4-6) and a drying air outlet pipe (4-7) are arranged on the side wall of the drying chamber (4-1), and the flowing direction of the gas in the drying chamber (4-1) is opposite to the flowing direction of the gas in the exchange membrane channel (4-2);
the gas outlet pipeline (5) is connected with the outlet end of the exchange membrane channel (4-2), the inlet end of the gas outlet pipeline (5) is provided with a valve (4-5), the gas outlet pipeline (5) is internally provided with a nitric oxide sensor (6), a sulfur dioxide sensor (7) and a carbon monoxide sensor (8), and the nitric oxide sensor (6), the sulfur dioxide sensor (7) and the carbon monoxide sensor (8) are electrically connected with a control terminal (9).
2. The diesel vehicle exhaust detection device according to claim 1, wherein two filter paper rotating shafts (2-2) are arranged in the smoke intensity detection chamber (2-1), two ends of the filter paper (3) are wound around the filter paper rotating shafts (2-2), the filter paper rotating shafts (2-2) rotate in the same direction to drive the filter paper, and the filter paper penetrates through the smoke intensity detection chamber (2-1) in a manner of cutting off the gas flow direction.
3. The diesel automobile exhaust detection device according to claim 1, characterized in that the drying chamber (4-1) is provided with a spiral flow guiding frame (4-8), the spiral flow guiding frame (4-8) is arranged around the proton exchange membrane (4-4), and the spiral flow guiding frame (4-8) guides the gas in the drying chamber (4-1) to flow in a spiral direction in the drying chamber (4-1).
4. The diesel vehicle exhaust detection device according to claim 1, characterized in that a return line (10) is provided between the inlet line (1) and the outlet line (5).
5. The diesel vehicle exhaust detection device according to claim 1, wherein a humidity sensor (11) is disposed at an inlet end of the air outlet pipe (5), and the humidity sensor (11) is electrically connected to the control terminal (9).
6. The diesel vehicle exhaust gas detection device according to claim 1, wherein the valves (4-5) are electrically controlled valves, and the valves (4-5) are electrically connected to the control terminal (9).
7. The diesel vehicle exhaust detection device according to claim 4, wherein an air pump (12) is disposed on the return pipe (10).
8. The diesel automobile exhaust detection device according to claim 4, characterized in that an electric control valve (13) is arranged on the return pipe (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221554926.1U CN217655090U (en) | 2022-06-21 | 2022-06-21 | Diesel vehicle exhaust gas detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221554926.1U CN217655090U (en) | 2022-06-21 | 2022-06-21 | Diesel vehicle exhaust gas detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217655090U true CN217655090U (en) | 2022-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221554926.1U Active CN217655090U (en) | 2022-06-21 | 2022-06-21 | Diesel vehicle exhaust gas detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217655090U (en) |
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2022
- 2022-06-21 CN CN202221554926.1U patent/CN217655090U/en active Active
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