Motor vehicle exhaust detection device

Abstract

The present invention provides a motor vehicle exhaust gas detection device, comprising a connecting pipe assembly, a separation assembly, a detection assembly and a catalytic treatment assembly; one end of the connecting pipe assembly is used to communicate with the exhaust gas emission port of the motor vehicle; the separation assembly has an inlet, a first outlet and a second outlet, and the inlet is connected to the other end of the connecting pipe assembly; the detection assembly comprises a first detection unit and a second detection unit, the inlet of the first detection unit is connected to the first outlet, and the inlet of the second detection unit is connected to the second outlet; the catalytic treatment assembly comprises a first treatment box and a second treatment box, the first treatment box is connected to the emission port of the first detection unit, and the second treatment box is connected to the emission port of the second detection unit. The exhaust gas detection device is not only easy to operate, but also can avoid adverse effects on the health of operators.

Description

Technical Field

[0001] This invention relates to the field of exhaust emission detection technology, and in particular to a motor vehicle exhaust emission detection device. Background Art

[0002] In recent years, with the rapid growth in the number of motor vehicles, the proportion of air pollution caused by motor vehicle exhaust emissions has been increasing year by year, and the emissions of pollutants such as nitrogen oxides and sulfur dioxide contained in motor vehicle exhaust have also increased year by year.

[0003] To better control the amount of pollutants emitted from vehicle exhaust, it is necessary to test vehicle exhaust. Currently, when testing vehicle exhaust, operators first use a simple air extraction pump inserted into the exhaust pipe to extract a certain amount of exhaust gas. Then, the exhaust gas in the air extraction pump is discharged into the exhaust gas detection unit for testing. After the exhaust gas detection unit has completed the test, the exhaust gas in the exhaust gas detection unit is directly discharged into the air.

[0004] The above-mentioned exhaust gas detection methods are inconvenient to operate, and the exhaust gas sampling process can have adverse effects on the health of operators. Summary of the Invention

[0005] This invention provides a vehicle exhaust emission detection device that is not only easy to operate, but also avoids adverse effects on the health of operators.

[0006] This invention provides a motor vehicle exhaust emission detection device, including a connecting pipe assembly, a separation assembly, a detection assembly, and a catalytic treatment assembly; one end of the connecting pipe assembly is detachably connected and communicates with the exhaust emission port of the motor vehicle; the separation assembly has an inlet, a first outlet, and a second outlet, the inlet being communicated with the other end of the connecting pipe assembly; the detection assembly includes a first detection unit and a second detection unit, the inlet of the first detection unit being communicated with the first outlet, and the inlet of the second detection unit being communicated with the second outlet; the catalytic treatment assembly includes a first treatment chamber and a second treatment chamber, the first treatment chamber being communicated with the emission port of the first detection unit, and the second treatment chamber being communicated with the emission port of the second detection unit.

[0007] In the motor vehicle exhaust emission detection device described above, optionally, the connecting pipe assembly includes a connecting pipe and a connecting hose, one end of the connecting hose being connected to the connecting pipe, and the other end of the connecting hose being connected to the exhaust emission port.

[0008] Optionally, in the motor vehicle exhaust emission detection device described above, an auxiliary air intake component is provided inside the connecting pipe. The auxiliary air intake component includes an annular fixing ring fixed on the inner wall of the connecting pipe and a guide vane disposed on the annular fixing ring. The guide vane can rotate around the axis of the annular fixing ring.

[0009] Optionally, in the motor vehicle exhaust emission detection device described above, the surface of the guide vanes is provided with a hydrophobic coating.

[0010] As described above, in the motor vehicle exhaust emission detection device, optionally, the separation component includes a U-shaped tube, a first outlet tube, and a second outlet tube. The inlet is located at one end of the U-shaped tube, the first outlet is located at a recess in the U-shaped tube, and the second outlet is located at the other end of the U-shaped tube. One end of the first outlet tube is connected to the first outlet, and the other end of the first outlet tube is connected to the inlet of the first detection unit. One end of the second outlet tube is connected to the second outlet, and the other end of the second outlet tube is connected to the inlet of the second detection unit.

[0011] Optionally, in the motor vehicle exhaust emission detection device described above, the first outlet pipe has a vertical pipe section, the top end of which is connected to the first outlet; a liquid level sensor is provided near the top end of the vertical pipe section, and a solenoid valve is provided near the bottom end of the vertical pipe section; a water supply pipe is connected to the portion of the vertical pipe section between the liquid level sensor and the solenoid valve; the solenoid valve is electrically connected to the liquid level sensor, and the solenoid valve opens the vertical pipe section when the liquid level sensor detects that the water level in the vertical pipe section exceeds a preset water level.

[0012] In the motor vehicle exhaust emission detection device described above, optionally, the first detection unit is a sulfur dioxide detector; and the second detection unit is a nitrogen oxide detector.

[0013] As described above, in the motor vehicle exhaust gas detection device, optionally, the nitrogen oxide detector includes an ozone chamber and a light sensor disposed above the ozone chamber, wherein the side wall of the ozone chamber facing the light sensor is a light-transmitting wall; the ozone chamber has an air inlet and an exhaust outlet, the air inlet being connected to the second outlet, and the exhaust outlet being connected to the second processing chamber.

[0014] Optionally, in the motor vehicle exhaust emission detection device described above, the nitrogen oxide detector is further equipped with an alarm, which is electrically connected to the light sensor. The alarm sounds when the light sensor detects that the light intensity inside the ozone chamber exceeds a preset intensity.

[0015] As described above, in the motor vehicle exhaust gas detection device, optionally, the first treatment box is used to contain alkaline slurry, and a waste discharge port is provided at the bottom of the first treatment box; the second treatment box is connected to an ammonia inlet pipe.

[0016] The vehicle exhaust gas detection device of the present invention includes a connecting pipe assembly, a separation assembly, a detection assembly, and a catalytic treatment assembly. By detachably connecting and communicating one end of the connecting pipe assembly to the exhaust outlet of a vehicle, the device can be directly installed on the vehicle's exhaust outlet for exhaust gas detection. This not only facilitates operation but also eliminates the need for manual sampling, thus preventing operators from inhaling exhaust gases and affecting their health. The separation assembly has an inlet, a first outlet, and a second outlet, with the inlet communicating with the other end of the connecting pipe assembly. The detection assembly includes a first detection unit and a second detection unit, with the inlet of the first detection unit communicating with the first outlet, and the inlet of the second detection unit communicating with the second outlet. This allows for separation of the exhaust gas before detection, improving detection accuracy. Furthermore, the catalytic treatment assembly includes a first treatment chamber and a second treatment chamber, with the first treatment chamber communicating with the exhaust outlet of the first detection unit and the second treatment chamber communicating with the exhaust outlet of the second detection unit. This allows for catalytic treatment of the exhaust gas emitted after detection, preventing direct emission of exhaust gas into the air and causing pollution. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart illustrating the workflow of a motor vehicle exhaust emission detection device according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of a motor vehicle exhaust emission detection device provided in an embodiment of the present invention;

[0020] Figure 3 This is an exploded view of the connecting pipe assembly of a motor vehicle exhaust emission detection device according to an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1-Connecting pipe assembly;

[0023] 11-Connecting pipe;

[0024] 12-Connecting hose;

[0025] 121-Elastic fixing strap;

[0026] 1211-Snap fastener;

[0027] 122 - Sealing ring;

[0028] 13-Auxiliary suction components;

[0029] 131 - Circular retaining ring;

[0030] 132 - Guide vane;

[0031] 2-Separate components;

[0032] 21-U-shaped tube;

[0033] 22-First outlet tube;

[0034] 221 - Liquid level sensor;

[0035] 222 - Solenoid valve;

[0036] 223 - Water pipe;

[0037] 23-Second outlet tube;

[0038] 31-First detection unit;

[0039] 32 - Second detection unit;

[0040] 321 - Ozone Chamber;

[0041] 3211 - Translucent box wall;

[0042] 322 - Optical Sensor;

[0043] 323 - Alarm;

[0044] 41-First processing box;

[0045] 411 - Waste discharge outlet;

[0046] 42 - Second processing box;

[0047] 421 - Ammonia gas inlet tube. Detailed Implementation

[0048] The increase in the number of motor vehicles has led to a year-on-year increase in the emissions of pollutants such as nitrogen oxides and sulfur dioxide from vehicle exhaust. When the concentration of nitrogen oxides in the air is too high, it irritates the lungs, making people more susceptible to respiratory illnesses such as colds, and may also damage the lung development of children. Furthermore, nitrogen oxides, primarily nitric oxide and nitrogen dioxide, are a major cause of photochemical smog and acid rain. Specifically, nitrogen oxides in vehicle exhaust react with hydrocarbons under ultraviolet radiation to form toxic smog, known as photochemical smog. Photochemical smog has a distinctive odor, irritates the eyes, damages plants, and reduces atmospheric visibility, endangering driving safety. Additionally, the nitric acid and nitrite produced by the reaction of nitrogen oxides with water in the air are important components of acid rain. When the concentration of sulfur dioxide in the air is too high, it oxidizes to form sulfuric acid mist or sulfate aerosols, which are important precursors to environmental acidification. Sulfur dioxide also irritates the human body, increasing the incidence of diseases and causing rapid deterioration of chronic conditions, seriously threatening human health.

[0049] For the reasons mentioned above, controlling the pollutant content in vehicle exhaust to reduce emissions of nitrogen oxides and sulfur dioxide has become a widespread concern. Therefore, to better control the nitrogen oxide and sulfur dioxide content in vehicle exhaust, it is first necessary to test the exhaust to determine if the levels of nitrogen oxides and sulfur dioxide meet requirements. Current technology requires operators to use a simple suction pump inserted into the vehicle's exhaust pipe to extract a certain amount of exhaust gas. This gas is then fed into an exhaust gas detection unit for testing. After the unit completes the test, the exhaust gas is directly released into the air. This method is not only inconvenient, but also poses a health risk to operators who may inhale exhaust fumes during sampling. Furthermore, directly releasing the exhaust gas into the air after testing increases the concentration of exhaust gases in the working environment, polluting the environment and threatening the health of operators.

[0050] To address the aforementioned technical problems, this invention provides a motor vehicle exhaust gas detection device. This device comprises a connecting pipe assembly, a separation assembly, a detection assembly, and a catalytic treatment assembly. The connecting pipe assembly allows the motor vehicle exhaust gas detection device to be detachably installed at the exhaust gas outlet of the motor vehicle. This not only facilitates exhaust gas detection operations but also eliminates the need for manual sampling by operators, thus helping to prevent operators from inhaling exhaust gases and affecting their health.

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0052] Figure 1 This is a flowchart illustrating the workflow of a motor vehicle exhaust emission detection device according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of a motor vehicle exhaust emission detection device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the connecting pipe assembly of a motor vehicle exhaust emission detection device according to an embodiment of the present invention.

[0053] like Figures 1 to 3 As shown, this embodiment provides a motor vehicle exhaust gas detection device, which includes a connecting pipe assembly 1, a separation assembly 2, a detection assembly, and a catalytic treatment assembly.

[0054] One end of the connecting pipe assembly 1 is used to detachably connect and communicate with the exhaust outlet of the motor vehicle. That is, the motor vehicle exhaust gas detection device can be installed on the exhaust outlet of the motor vehicle through the connecting pipe assembly 1, so that the exhaust gas discharged from the exhaust outlet of the motor vehicle can enter the motor vehicle exhaust gas detection device for detection through the connecting pipe assembly 1.

[0055] The separation assembly 2 has an inlet, a first outlet, and a second outlet. The inlet is connected to the other end of the connecting pipe assembly 1, allowing the exhaust gas from the vehicle to enter the separation assembly 2 through the connecting pipe assembly 1. The exhaust gas is separated into two types of pollutants, such as sulfur dioxide and nitrogen oxides, by the separation assembly 2. These two types of pollutants can be discharged from the first outlet and the second outlet, respectively. The separation assembly 2 typically separates gases based on their physicochemical properties. For example, sulfur dioxide and nitrogen oxides can be separated based on their different solubilities in water. In other embodiments, other separation methods can be set according to the differences in the physicochemical properties of the gases to be separated, which will not be elaborated here.

[0056] The detection assembly includes a first detection unit 31 and a second detection unit 32. The inlet of the first detection unit 31 is connected to the first outlet of the separation assembly, and the inlet of the second detection unit 32 is connected to the second outlet of the separation assembly. This allows the components of the vehicle exhaust gas separated by the separation assembly 2, such as sulfur dioxide and nitrogen oxides, to enter the first detection unit 31 and the second detection unit 32 for detection, respectively. This improves the accuracy of the detection and facilitates targeted catalytic treatment of the exhaust gas emitted from the first detection unit 31 and the second detection unit 32 to prevent the exhaust gas emitted from the first detection unit 31 and the second detection unit 32 from continuing to pollute the environment.

[0057] The catalytic treatment assembly includes a first treatment box 41 and a second treatment box 42. The first treatment box 41 is connected to the exhaust port of the first detection unit 31, and the second treatment box 42 is connected to the exhaust port of the second detection unit 32. This allows the exhaust gas from the first detection unit 31 to be discharged into the first treatment box 41 for catalytic treatment, and the exhaust gas from the second detection unit 32 to be discharged into the second treatment box 42 for catalytic treatment. This avoids the exhaust gas from the first detection unit 41 and the second detection unit 42 from directly entering the environment and causing pollution.

[0058] In practice, when it is necessary to test the exhaust emissions of a motor vehicle, firstly, the motor vehicle exhaust emission testing device is installed at the exhaust outlet of the motor vehicle via the connecting pipe assembly 1. Then, the motor vehicle is started to bring it into the operating condition required for exhaust emission testing, so that the exhaust emission testing device can test the exhaust emissions. Specifically, the exhaust emissions generated by the motor vehicle when it is running enter the connecting pipe assembly 1 of the exhaust emission testing device through the exhaust outlet, and are then transported to the separation assembly 2. The separation assembly 2 can separate the exhaust emissions of the motor vehicle, for example, separating sulfur dioxide and nitrogen oxides from the exhaust emissions. Sulfur dioxide and nitrogen oxides are discharged through the first outlet and the second outlet of the separation assembly, respectively, and transported to the first detection unit 31 and the second detection unit 32 of the motor vehicle exhaust emission testing device. The first detection unit 31 and the second detection unit 32 can analyze and detect the components of the exhaust emissions transported from the separation assembly 2, thereby enabling the motor vehicle exhaust emission testing device to test the exhaust emissions of the motor vehicle. The purpose of the exhaust gas testing is as follows: after the first testing unit 31 completes its test, the remaining exhaust gas in the first testing unit 31 can be discharged from the exhaust port of the first testing unit 31 to the first treatment box 41; after the second testing unit 32 completes its test, the remaining exhaust gas in the second testing unit 32 can be discharged from the exhaust port of the second testing unit 32 to the second treatment box 42. The first treatment box 41 can perform targeted catalytic treatment on the exhaust gas from the first testing unit 31, and the second treatment box 42 can perform targeted catalytic treatment on the exhaust gas from the second testing unit 32, thereby preventing the exhaust gas from being directly emitted into the environment and causing pollution. After the vehicle exhaust gas test is completed, the vehicle exhaust gas testing device can be removed from the vehicle's exhaust port.

[0059] The vehicle exhaust gas detection device of this embodiment includes a connecting pipe assembly 1, a separation assembly 2, a detection assembly, and a catalytic converter assembly. By detachably connecting and communicating one end of the connecting pipe assembly 1 to the exhaust outlet of the vehicle, the vehicle exhaust gas detection device can be directly installed on the exhaust outlet of the vehicle for exhaust gas detection. This not only facilitates operation but also eliminates the need for manual sampling by operators, thus avoiding the health risks associated with inhaling exhaust gases. The separation assembly 2 has an inlet, a first outlet, and a second outlet, with the inlet communicating with the other end of the connecting pipe assembly 1. The detection assembly includes… The first detection unit 31 and the second detection unit 32 are connected. The inlet of the first detection unit 31 is connected to the first outlet, and the inlet of the second detection unit 32 is connected to the second outlet, so as to separate the exhaust gas for detection and improve the accuracy of detection. In addition, by setting a catalytic treatment assembly including a first treatment box 41 and a second treatment box 42, the first treatment box 41 is connected to the exhaust port of the first detection unit 31, and the second treatment box 42 is connected to the exhaust port of the second detection unit 32, so as to perform catalytic treatment on the exhaust gas emitted after the detection unit completes the detection, thereby avoiding the exhaust gas from being directly emitted into the air and causing pollution.

[0060] like Figure 3 As shown, the connecting pipe assembly 1 includes a connecting hose 12 and a connecting pipe 11. One end of the connecting hose 12 is connected to the connecting pipe 11, and the other end of the connecting hose 12 is used to connect to the exhaust outlet of the vehicle. Preferably, the end of the connecting hose 12 connected to the exhaust outlet of the vehicle can be directly fitted onto the exhaust outlet of the vehicle to connect the connecting pipe assembly 1 to the exhaust outlet of the vehicle, thereby achieving the purpose of connecting the vehicle exhaust emission detection device to the exhaust outlet of the vehicle.

[0061] In other embodiments, the connecting hose may also be connected to the vehicle's exhaust outlet in other ways, which will not be described in detail here.

[0062] Furthermore, to make the connection between the connecting hose 12 in the connecting pipe assembly 1 and the exhaust outlet of the vehicle more reliable, after the connecting hose 12 is sleeved on the outside of the exhaust outlet of the vehicle, an elastic fixing band 121 can be sleeved around the portion of the connecting hose 12 that is sleeved on the outside of the exhaust outlet of the vehicle. The elastic fixing band 121 can apply a contraction force to the connecting hose 12 to press the connecting hose 12 tightly on the outside of the exhaust outlet of the vehicle, thereby preventing the connecting hose 12 from coming loose from the exhaust outlet of the vehicle during the operation of the exhaust gas detection device. This allows the vehicle exhaust gas detection device to be reliably installed on the exhaust outlet of the vehicle and to successfully complete the exhaust gas detection.

[0063] Preferably, the elastic fixing band 121 is provided with a buckle 1211 that can connect the two ends of the elastic fixing band 121. Specifically, after the connecting hose 12 is fitted onto the outside of the exhaust port of the vehicle, the elastic fixing band 121 is wrapped around the part of the connecting hose 12 fitted onto the outside of the exhaust port of the vehicle, and the two ends of the elastic fixing band 121 are connected with the buckle 1211 to form a ring structure that can press the connecting hose 12 tightly against the outside of the exhaust port of the vehicle, so that the vehicle exhaust gas detection device can be installed more reliably on the exhaust port of the vehicle.

[0064] In other embodiments, the elastic fixing band can also be a complete annular elastic fixing band. When the vehicle exhaust emission detection device is in an unused state, the annular elastic fixing band can be sleeved around the connecting hose to prevent loss. Specifically, after the connecting hose is sleeved on the outside of the vehicle's exhaust outlet, the annular elastic fixing band is moved from other positions on the connecting hose to the portion of the connecting hose sleeved on the outside of the vehicle's exhaust outlet, so that the annular elastic fixing band can press the connecting hose tightly onto the vehicle's exhaust outlet, thereby enabling the vehicle exhaust emission detection device to be installed more reliably on the vehicle's exhaust outlet.

[0065] Furthermore, to make the connection between the connecting hose 12 and the vehicle's exhaust outlet more reliable, a sealing ring 122 can be provided on the inner wall of the connecting hose 12. When the connecting hose 12 is fitted onto the vehicle's exhaust outlet, the sealing ring 122 is located between the inner wall of the connecting hose and the outer wall of the vehicle's exhaust outlet, thereby increasing the sealing between the connecting hose 12 and the vehicle's exhaust outlet. This ensures that the exhaust gas emitted from the vehicle's exhaust outlet will not leak during its entry into the connecting pipe assembly, thus avoiding environmental pollution.

[0066] In specific implementation, the connecting pipe assembly 1 includes a connecting pipe 11 and a connecting hose 12 connected together. A sealing ring 122 is provided on the inner side of the end of the connecting hose 12 that communicates with the exhaust port of the vehicle, and an elastic fixing strap 121 is provided on the outer side of the end of the connecting hose 12 that communicates with the exhaust port of the vehicle. When it is necessary to test the exhaust emissions of the vehicle, the vehicle exhaust emission testing device is first installed on the exhaust port of the vehicle. That is, the connecting hose 12 in the connecting pipe assembly 1 is directly sleeved on the exhaust port of the vehicle, and then the elastic fixing strap 121 is wrapped around the part of the connecting hose 12 that is sleeved on the outer side of the exhaust port of the vehicle, and the buckle 1211 on the elastic fixing strap 121 is fastened so that the elastic fixing strap 121 presses the connecting hose tightly on the exhaust port of the vehicle, thereby ensuring the reliability of the connection between the vehicle exhaust emission testing device and the exhaust port of the vehicle.

[0067] This embodiment includes a connecting hose 12 in the connecting pipe assembly 1 and connects the connecting hose 12 to the exhaust outlet of the motor vehicle, thereby enabling the motor vehicle exhaust detection device of this embodiment to be applicable to exhaust outlets of different sizes. That is, the motor vehicle exhaust detection device of this embodiment can be used to detect exhaust gases emitted by different motor vehicles.

[0068] like Figure 3 As shown, the connecting pipe 11 of this embodiment is provided with an auxiliary suction component 13. Specifically, the auxiliary suction component 13 includes an annular fixing ring 131 fixed on the inner wall of the connecting pipe 11 and a guide vane 132 disposed on the annular fixing ring 131, and the guide vane 132 can rotate around the axis of the annular fixing ring 131.

[0069] In practice, a vehicle exhaust emission detection device equipped with an auxiliary intake component 13 is installed on the vehicle's exhaust outlet. When exhaust gas from the vehicle's exhaust outlet enters the connecting pipe 11 of the vehicle exhaust emission detection device and flows through the auxiliary intake component 13, the flow of exhaust gas drives the guide vanes 132 of the auxiliary intake component 13 to rotate. The rotation of the guide vanes 132 further accelerates the flow speed of exhaust gas into the vehicle exhaust emission detection device, thereby increasing the speed at which the vehicle exhaust emission detection device collects exhaust gas and thus improving the detection efficiency of the vehicle exhaust emission detection device. The number of guide vanes 132 can be set to three, four, five, or other numbers according to actual needs, and no specific limitation is made here.

[0070] Furthermore, in order to prevent harmful substances in the exhaust gas of motor vehicles from adhering to the guide vane 132 and affecting the exhaust gas analysis results of the motor vehicle exhaust gas detection device, a hydrophobic coating can be provided on the surface of the guide vane 132. The hydrophobic coating can be a polymer material such as alkanes, silanes or fluoroalkanes.

[0071] In practice, a vehicle exhaust gas detection device with a hydrophobic coating on the surface of the guide vane 132 is installed on the exhaust outlet of a vehicle. When the exhaust gas discharged from the exhaust outlet of the vehicle enters the connecting pipe of the vehicle exhaust gas detection device and flows through the guide vane 132, the hydrophobic coating on the surface of the guide vane 132 can prevent harmful substances in the exhaust gas from adhering to the guide vane, thereby avoiding distortion of the detection results of the vehicle exhaust gas detection device.

[0072] like Figure 2As shown, the separation component 2 in this embodiment includes a U-shaped tube 21, a first outlet tube 22, and a second outlet tube 23. The inlet of the separation component is located at one end of the U-shaped tube 21, the first outlet of the separation component is located at the recess of the U-shaped tube 21, and the second outlet of the separation component is located at the other end of the U-shaped tube 21. One end of the first outlet tube 22 is connected to the first outlet, and the other end of the first outlet tube 22 is connected to the inlet of the first detection unit 31. One end of the second outlet tube 23 is connected to the second outlet, and the other end of the second outlet tube 23 is connected to the inlet of the second detection unit 32.

[0073] In practice, the vehicle exhaust gas detection device is installed on the exhaust gas outlet of the vehicle. The exhaust gas emitted by the vehicle can enter the U-shaped tube 21 through the inlet of the U-shaped tube, and then be separated into two paths in the U-shaped tube 21. One path is discharged from the first outlet of the U-shaped tube and enters the first detection unit 31 through the first outlet pipe 22 for analysis and detection. The other path is discharged from the second outlet of the U-shaped tube and enters the second detection unit 32 through the second outlet pipe 23 for analysis and detection.

[0074] In this embodiment, sulfur dioxide and nitrogen oxides in motor vehicle exhaust are separated and detected separately using a U-shaped tube 21. This not only improves the accuracy of detection but also facilitates targeted catalytic treatment of the exhaust gases emitted from the first detection unit 31 and the second detection unit 32, preventing the exhaust gases emitted from the first detection unit 31 and the second detection unit 32 from continuing to pollute the environment.

[0075] Specifically, the first outlet pipe 22 has a vertical pipe section, the top of which is connected to the first outlet. A liquid level sensor 221 is installed near the top of the vertical pipe section, which can be used to detect the liquid level in the vertical pipe section. A solenoid valve 222 is installed near the bottom of the vertical pipe section, which is used to disconnect or open the first outlet pipe 22, that is, to disconnect or open the passage between the first outlet of the U-shaped pipe and the first detection unit 31. When the vehicle exhaust gas detection device is in an idle state, the solenoid valve 222 is in a normally closed state, and the first outlet pipe 22 is in an open state. A water supply pipe 223 is connected to the part of the vertical pipe section between the liquid level sensor 221 and the solenoid valve 222, which is used to supply water into the vertical pipe section of the first outlet pipe 22. In addition, the solenoid valve 222 is electrically connected to the liquid level sensor 221, and the solenoid valve 222 can open the vertical pipe section when the liquid level sensor 221 detects that the water level in the vertical pipe section exceeds a preset water level.

[0076] In practice, the vehicle exhaust gas detection device is installed on the vehicle's exhaust outlet, and a certain amount of water is introduced into the vertical section of the first outlet pipe 22 through the water supply pipe 223. The liquid level in the vertical pipe section is a certain distance lower than the liquid level sensor 221. When the vehicle's exhaust gas enters the U-shaped tube 21 in the vehicle exhaust gas detection device, the sulfur dioxide gas contained in the exhaust gas entering the U-shaped tube 21 will dissolve in the water, causing the liquid level in the vertical pipe section to rise. If the sulfur dioxide gas content in the exhaust gas exceeds the requirement, the liquid level in the vertical pipe section will rise more significantly. When the liquid level in the vertical pipe section reaches or exceeds the height of the liquid level sensor 221, the liquid level sensor 221 will send an electrical signal to control the solenoid valve 222 to open the first outlet pipe 22, allowing the liquid containing sulfur dioxide gas to flow into the first detection unit 31, so as to detect the sulfur dioxide content in the first detection unit 31.

[0077] The first detection unit 31 in this embodiment can be a sulfur dioxide detector, which can detect the sulfur dioxide content in a liquid containing sulfur dioxide to ultimately determine the sulfur dioxide content in motor vehicle exhaust. The second detection unit 32 in this embodiment can be a nitrogen oxide detector, which can detect the nitrogen oxide content in the gas discharged from the second outlet of the separation component to ultimately determine the nitrogen oxide content in motor vehicle exhaust.

[0078] Specifically, the nitrogen oxide detector may include an ozone chamber 321 and a light sensor 322 disposed above the ozone chamber 321. The side wall of the ozone chamber 321 facing the light sensor 322 is configured as a light-transmitting wall 3211 so that the light sensor 322 can detect the light intensity in the ozone chamber 321. The ozone chamber 321 has an air inlet and an exhaust outlet. The air inlet of the ozone chamber 321 is connected to the second outlet of the separation component so that the gas discharged from the second outlet of the separation component can directly enter the ozone chamber 321 for analysis and detection. The exhaust outlet of the ozone chamber 321 is connected to the second treatment chamber 42 so that the detection exhaust gas discharged from the ozone chamber 321 can enter the second treatment chamber 42 for catalytic treatment, thereby preventing the detection exhaust gas from being emitted into the air and causing pollution.

[0079] In practice, the vehicle exhaust gas detection device is installed on the exhaust outlet of the vehicle. After the vehicle exhaust gas is discharged, it first enters the separation component 2. The sulfur dioxide gas in the exhaust gas dissolves in water and is separated. The nitrogen oxide gas that does not dissolve in water in the exhaust gas is directly discharged from the second outlet of the separation component and enters the ozone chamber 321 of the nitrogen oxide detector. The nitrogen oxide reacts with ozone in the ozone chamber 321 and generates light intensity. This light intensity can pass through the light-transmitting chamber wall 3211 of the ozone chamber 321 and be detected by the light sensor 322. Thus, the content of nitrogen oxide in the exhaust gas can be analyzed based on the light intensity detected by the light sensor 322.

[0080] Furthermore, an alarm 323 can be installed on the nitrogen oxide detector, and the alarm 323 can be electrically connected to the light sensor 322. The alarm 323 can sound an alarm when the light sensor 322 detects that the light intensity inside the ozone chamber 321 exceeds a preset intensity. The alarm 323 can sound an alarm by emitting sound, by illuminating a light, or by emitting sound and illuminating a light simultaneously.

[0081] In practice, a vehicle exhaust gas detection device with an alarm 323 is installed on the exhaust gas outlet of a vehicle to detect exhaust gas. When the light intensity emitted after the gas entering the ozone chamber 321 reacts with ozone exceeds the preset value of the light sensor 322, the light sensor 322 will send an electrical signal to drive the alarm 323 connected to it to sound an alarm, so as to remind the testing personnel that the nitrogen oxide content in the exhaust gas is too high.

[0082] In this embodiment, the first treatment tank 41 is used to contain an alkaline slurry. The alkaline solution can react with the sulfur dioxide-containing liquid discharged from the sulfur dioxide detector to remove the sulfur dioxide, thereby preventing sulfur dioxide from being discharged and polluting the environment. Simultaneously, a waste discharge port 411 is provided at the bottom of the first treatment tank 41 to facilitate the discharge of waste material from the sulfur dioxide-containing liquid treated in the first treatment tank 41. In this embodiment, the second treatment tank 42 is connected to an ammonia inlet pipe 421. The ammonia introduced into the second treatment tank 42 can react with the detection waste gas discharged from the ozone chamber 321 and entering the second treatment tank 42 to remove nitrogen oxides from the detection waste gas, thereby preventing nitrogen oxides from being discharged and polluting the environment.

[0083] In the description of this invention, it should be understood that the terms "top", "bottom", "upper", "lower" (if present) indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0084] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0085] The terms "first" and "second" in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A motor vehicle exhaust gas detection device, characterized in that: It includes a connecting pipe assembly, a separation assembly, a detection assembly and a catalytic treatment assembly; One end of the connecting pipe assembly is used to be detachably connected to and communicate with the exhaust gas outlet of the motor vehicle; The separation assembly has an inlet, a first outlet, and a second outlet, wherein the inlet is connected to the other end of the connecting pipe assembly; The detection assembly comprises a first detection unit and a second detection unit, the inlet of the first detection unit is connected to the first outlet, and the inlet of the second detection unit is connected to the second outlet; The catalytic treatment assembly includes a first treatment box and a second treatment box, the first treatment box is communicated with the discharge port of the first detection unit, and the second treatment box is communicated with the discharge port of the second detection unit; The connecting pipe assembly comprises a connecting pipe; An auxiliary air suction member is arranged in the connecting pipe, and the auxiliary air suction member comprises an annular fixing ring fixed on the inner wall of the connecting pipe and a guide vane arranged on the annular fixing ring, and the guide vane can rotate around the axis of the annular fixing ring; The surface of the guide vane is provided with a hydrophobic coating; The separation assembly comprises a U-shaped tube, a first outlet tube and a second outlet tube, the inlet is opened at one end of the U-shaped tube, the first outlet is opened at a recess of the U-shaped tube, and the second outlet is opened at the other end of the U-shaped tube; One end of the first outlet pipe is connected to the first outlet, and the other end of the first outlet pipe is connected to the inlet of the first detection unit; One end of the second outlet pipe is connected to the second outlet, and the other end of the second outlet pipe is connected to the inlet of the second detection unit; The first outlet pipe has a vertical pipe section, and the top end of the vertical pipe section is connected to the first outlet; A liquid level sensor is arranged near the top end of the vertical pipe section, a solenoid valve is arranged near the bottom end of the vertical pipe section, and a water pipe is connected to the part of the vertical pipe section between the liquid level sensor and the solenoid valve; The solenoid valve is electrically connected to the liquid level sensor, and the solenoid valve conducts the vertical pipe section when the liquid level sensor detects that the water level in the vertical pipe section exceeds a preset water level; The first detection unit is a sulfur dioxide detector; The second detection unit is a nitrogen oxide detector.

2. The motor vehicle exhaust gas detection device according to claim 1, characterized in that: The connecting pipe assembly further comprises a connecting hose, one end of which is in communication with the connecting pipe, and the other end of which is in communication with the exhaust port.

3. The motor vehicle exhaust gas detection device according to claim 1 or 2, characterized in that: The nitrogen oxide detector comprises an ozone box and a light sensor arranged above the ozone box, and a box wall of the ozone box facing the light sensor is a light-transmitting box wall; The ozone box has an air inlet and an air outlet, the air inlet is communicated with the second outlet, and the air outlet is communicated with the second processing box.

4. The motor vehicle exhaust gas detection device according to claim 3, characterized in that: The nitrogen oxide detector is also provided with an alarm, which is electrically connected to the light sensor. The alarm sounds an alarm when the light sensor detects that the light intensity in the ozone box exceeds a preset intensity.

5. The motor vehicle exhaust gas detection device according to claim 3, characterized in that: The first processing box is used to contain alkaline slurry, and a waste discharge port is provided at the bottom of the first processing box; The second processing box is connected to an ammonia gas introduction pipe.

6. The motor vehicle exhaust gas detection device according to claim 4, characterized in that: The first processing box is used to contain alkaline slurry, and a waste discharge port is provided at the bottom of the first processing box; The second processing box is connected to an ammonia gas introduction pipe.

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