Detection equipment for automobile exhaust

Abstract

The invention relates to the technical field of automobile exhaust detection, and discloses automobile exhaust detection equipment, four corners of the bottom of a detection box are fixedly connected with vibration reduction supports, the bottoms of the vibration reduction supports are fixedly connected with a fixed bottom plate, and the tops of the two sides of the surface of the fixed bottom plate are fixedly connected with auxiliary vibration reduction gas collection assemblies. A detection filter screen is fixedly connected to one side of the interior of the detection box, and a filter membrane is arranged in the position, fixedly connected with the detection filter screen, of the detection box. When the detection box is lifted, the vibration reduction support and the auxiliary vibration reduction gas collection assembly absorb and reduce downward force generated by bumping, and the vibration reduction spring sleeving the surface of the vibration reduction support rebounds to drive the detection box to lift. And the auxiliary vibration reduction and gas collection assembly is used for limiting again to prevent the bounce from causing deviation or poor circuit contact of an optical assembly such as a laser spectrometer lens in the detection box.

Description

Technical Field

[0001] This invention relates to the field of automotive exhaust emission detection technology, and more specifically to a detection device for automotive exhaust emissions. Background Technology

[0002] Vehicle exhaust emission testing equipment is a professional instrument used to measure pollutants emitted by motor vehicles (such as carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and particulate matter (PM). It is widely used in environmental monitoring stations, vehicle inspection agencies, and repair shops. Its core function is to analyze exhaust gas components in real time using technologies such as infrared, electrochemical, or ultraviolet spectroscopy to ensure that vehicles meet national or regional emission standards. Modern equipment usually has high-precision sensors, automatic data storage, and networking capabilities. Some support OBD (On-Board Diagnostics) for rapid detection, helping to reduce air pollution and improve regulatory efficiency. However, despite the important role of vehicle exhaust emission testing equipment in environmental regulation, there are still some limitations. In particular, the equipment carried on the road is easily affected by bumps, which can cause optical components (such as laser spectrometer lenses) to shift or poor circuit contact. In addition, the sampling port of the equipment is prone to dust inhalation in outdoor environments, which can clog the filter membrane or cover the sensor surface, requiring frequent manual cleaning and seriously affecting its detection efficiency. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a detection device for automobile exhaust gas, so as to solve the problems existing in the background art.

[0004] This invention provides the following technical solution: a detection device for automobile exhaust gases, comprising a detection chamber, vibration damping brackets fixedly connected to the four corners of the bottom of the detection chamber, a fixed base plate fixedly connected to the bottom of the vibration damping brackets, auxiliary vibration damping and gas collection components fixedly connected to the top of both sides of the fixed base plate, a detection filter fixedly connected to one side of the inside of the detection chamber, a filter membrane formed inside the detection chamber located within the fixedly connected detection filter, a cleaning cover formed around the surface of the filter membrane inside the detection chamber, and a pressure storage box fixedly connected to both sides of the surface of the detection chamber and adjacent to the middle of the auxiliary vibration damping and gas collection components, with a one-way exhaust pipe fixedly connected to one side of the surface of the pressure storage box. The other end of the one-way exhaust pipe passes through the inside of the test box and is fixedly connected to one side of the surface of the cleaning cover. The test box is fixedly connected to the internal position of the test filter and has a sampling port. Fixed connectors are fixedly connected to both sides of the surface of the test box at the top of the auxiliary vibration damping and gas collection assembly. Through the vibration damping bracket, fixed base plate and auxiliary vibration damping and gas collection assembly, the test box can absorb and reduce the downward force generated by the bumps during transportation. When the vibration damping spring sleeved on the surface of the vibration damping bracket rebounds and drives the test box to rise, the auxiliary vibration damping and gas collection assembly further restricts the rebound force to prevent the optical components inside the test box, such as the laser spectrometer lens, from shifting or the circuit contact from becoming poor. Furthermore, one-way air inlets are provided on both sides of the surface of the air pressure storage box near the bottom, a pressure gauge is provided on the top of the air pressure storage box, a pressure relief valve is provided on the top of the air pressure storage box near the pressure gauge, and an exhaust valve is provided on the side of the one-way exhaust pipe near the air pressure storage box. The pressure relief valve helps to discharge when the internal pressure of the air pressure storage box is high, thus avoiding the internal pressure of the air pressure storage box from affecting the vibration reduction effect of the test box.

[0005] Furthermore, a sealing plug is movably fitted inside the pressure relief valve, and a resistance spring is fixedly connected to the top of the sealing plug. The other end of the resistance spring is fixedly connected to the top of the pressure relief valve. A pressure relief hole is opened on the surface of the pressure relief valve near the top. Through the sealing plug, the resistance spring, and the pressure relief hole, when the pressure inside the air pressure storage tank exceeds the threshold, the air pressure will push the sealing plug up and compress the resistance spring, thereby allowing the air pressure inside the air pressure storage tank to be discharged through the pressure relief hole to complete the pressure relief.

[0006] Furthermore, a cleaning cavity is provided inside the cleaning hood, and an air inlet is provided at the location where the cleaning hood is fixedly connected to the one-way exhaust pipe. Cleaning nozzles are arranged in a regular pattern around the inner wall of the cleaning hood. Through the cleaning hood, when it is necessary to clean the filter membrane, the cleaning gas discharged through the cleaning hood impacts the filter membrane in the reverse direction, so that the dust attached to its surface is removed, reducing the number of manual cleaning steps.

[0007] Furthermore, the cleaning nozzle includes a nozzle body, and a baffle plate is fixedly connected to one side of the nozzle body. A one-way exhaust valve core is movably sleeved on the top of the baffle plate. Through the cleaning nozzle, when the filter membrane needs to be cleaned, the cleaning gas discharged through the cleaning hood impacts the filter membrane in the opposite direction, so that the dust attached to its surface is cleaned, reducing the number of manual cleaning steps.

[0008] Furthermore, each position of the fixed base plate that is fixedly connected to the auxiliary vibration damping and air collection component is fixedly connected to a support plate. A cleaning mesh is fixedly sleeved inside each support plate. The vibration damping bracket includes a vibration damping cavity tube. A vibration damping spring is movably sleeved inside the vibration damping cavity tube. A vibration damping piston rod is movably sleeved on the surface of the vibration damping cavity tube. Through the support plate and the cleaning mesh, the auxiliary vibration damping and air collection component is supported. And through the cleaning mesh and the cleaning filter element, the air entering the auxiliary vibration damping and air collection component is filtered and cleaned.

[0009] Furthermore, an inflation plug assembly is movably sleeved inside the auxiliary vibration damping and air collection component near the top. One-way air guide pipes are fixedly connected to the surface of the auxiliary vibration damping and air collection component near the air pressure storage tank. A one-way air inlet bend is fixedly connected to the surface of the auxiliary vibration damping and air collection component away from the one-way air guide pipes. A cleaning filter element is fixedly connected to the bottom of the auxiliary vibration damping and air collection component. The other end of the one-way air inlet bend is fixedly connected to the surface of the cleaning filter element near the top. Through the cleaning filter element and the one-way air inlet bend, it is convenient to send the cleaned and filtered air into the auxiliary vibration damping and air collection component via the one-way air inlet bend, facilitating the subsequent collection and use of clean air.

[0010] Furthermore, the inflation plug assembly includes a fixed push rod with a handle fixedly connected to its top. Piston inflation rods are fixedly connected to both sides of the bottom of the fixed push rod. Threaded grooves are formed on the surface of each piston inflation rod near its top, and limit nuts are movably fitted onto the surface of each threaded groove. A sealing rubber plug is fixedly connected to one end of each piston inflation rod inside the one-way valve core. A circular through-hole is formed at the top of the auxiliary vibration damping and air collection assembly. One-way valve cores are formed inside the one-way air inlet bend and the one-way air guide pipe. Each one-way valve core includes a one-way sealing block, and a rotating air guide plate is movably connected to one side of the one-way sealing block. The inflation plug assembly facilitates up-and-down movement of the inflation plug assembly when vibrations occur during the transport of the testing box. This absorbs and reduces the force of the vibration while simultaneously drawing external air into the auxiliary vibration damping and air collection assembly for collection. The collected air then passes through the one-way valve core inside the air inlet bend and the one-way air guide pipe, preventing air backflow from affecting subsequent cleaning and use.

[0011] Furthermore, a cleaning exhaust port is provided at the position where the cleaning filter element is fixedly connected to the one-way air intake bend pipe. An activated carbon core is fixedly sleeved inside the cleaning filter element. A non-powered fan is fixedly connected to the bottom of the activated carbon core. A cleaning brush rod is provided on the side of the non-powered fan away from the activated carbon core. The cleaning brush rod on the side of the non-powered fan helps the non-powered fan drive the cleaning brush rod to rotate when air is intake, thereby cleaning the surface of the cleaning screen and preventing it from being blocked by dust and affecting the air intake.

[0012] The technical effects and advantages of this invention are as follows: This invention, by incorporating a vibration-damping bracket, a fixed base plate, and an auxiliary vibration-damping and gas-collecting assembly, facilitates the absorption and reduction of downward forces generated by the bumps during transport of the testing box. Furthermore, when the vibration-damping spring, fitted onto the surface of the vibration-damping bracket, rebounds and lifts the testing box, the auxiliary vibration-damping and gas-collecting assembly further restricts the rebound force, preventing it from causing misalignment of optical components inside the testing box, such as laser spectrometer lenses, or poor circuit contact.

[0013] This invention, by incorporating an auxiliary vibration damping and gas collection component, a cleaning filter element, an inflation plug assembly, a pressure storage box, and a cleaning hood, facilitates the movement of the inflation plug assembly within the auxiliary vibration damping and gas collection component when the detection box vibrates. This allows the auxiliary vibration damping and gas collection component to send the cleaning gas inside into the pressure storage box for storage. When the filter membrane surface needs cleaning, the exhaust air through the cleaning hood causes the reverse air pressure to blow off dust particles from the filter membrane surface, thus reducing manual operation steps and improving its actual working efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 3 This is a schematic cross-sectional view of the detection box structure of the present invention.

[0017] Figure 4 This is a cross-sectional schematic diagram of the air pressure storage box structure of the present invention.

[0018] Figure 5 This is a schematic cross-sectional view of the pressure relief valve structure of the present invention.

[0019] Figure 6 This is a schematic cross-sectional view of the cleaning hood structure of the present invention.

[0020] Figure 7 This is a cross-sectional schematic diagram of the cleaning nozzle structure of the present invention.

[0021] Figure 8 This is a schematic diagram of the fixed base plate structure of the present invention.

[0022] Figure 9 This is a cross-sectional schematic diagram of the vibration-damping hollow tube structure of the present invention.

[0023] Figure 10 This is a schematic diagram of the auxiliary vibration damping and gas collection component of the present invention.

[0024] Figure 11 This is a schematic diagram of the structure of the inflatable plug rod assembly of the present invention.

[0025] Figure 12 This is a schematic cross-sectional view of the auxiliary vibration damping and gas collection component structure of the present invention.

[0026] Figure 13 This is a schematic cross-sectional view of the cleaning filter element structure of the present invention.

[0027] Figure 14 This is a schematic diagram of the non-powered fan structure of the present invention.

[0028] Figure 15 This is a schematic diagram of the one-way valve core structure of the present invention.

[0029] The attached figures are labeled as follows: 1. Detection box; 101. Sampling port; 102. Fixed connector; 2. Vibration damping bracket; 201. Vibration damping cavity tube; 202. Vibration damping spring; 203. Vibration damping piston rod; 3. Fixed base plate; 301. Support plate; 302. Cleaning screen; 4. Auxiliary vibration damping gas collection assembly; 401. Circular through hole; 5. Detection filter screen; 6. Filter membrane; 7. Cleaning cover; 701. Cleaning inner cavity; 702. Air inlet hole; 703. Cleaning nozzle; 7031. Nozzle body; 7032. Barrier plate; 7033. One-way exhaust valve core; 8. Air pressure storage box; 801. One-way air inlet; 802. Pressure gauge; 803. Leakage valve. 8031, Pressure valve; 8032, Sealing plug; 8033, Resistance spring; 8034, Pressure relief hole; 9, One-way exhaust pipe; 901, Exhaust valve; 10, One-way intake bend pipe; 11, One-way air guide pipe; 12, Cleaning filter element; 1201, Cleaning exhaust port; 1203, Activated carbon core; 1204, Non-powered fan; 1205, Cleaning brush rod; 13, Inflation plug rod assembly; 1301, Fixed push rod; 1302, Handle; 1303, Piston inflation rod; 1304, Sealing rubber plug; 1305, Threaded groove; 1306, Limit nut; 14, One-way valve core; 1401, One-way sealing block; 1402, Rotary air guide plate. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The detection device for automobile exhaust gas involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Reference Figures 1-15 As shown, the present invention provides a detection device for automobile exhaust gas, including a detection box 1. Vibration damping brackets 2 are fixedly connected to the four corners of the bottom of the detection box 1. A fixed base plate 3 is fixedly connected to the bottom of the vibration damping brackets 2. Auxiliary vibration damping gas collection components 4 are fixedly connected to the top of both sides of the fixed base plate 3. A detection filter 5 is fixedly connected to one side of the inside of the detection box 1. A filter membrane 6 is provided inside the detection box 1 at the position where the detection filter 5 is fixedly connected. A cleaning cover 7 is provided around the surface of the filter membrane 6 inside the detection box 1. A pressure storage box 8 is fixedly connected to both sides of the surface of the detection box 1 and at the middle of the adjacent auxiliary vibration damping gas collection components 4. A one-way exhaust pipe 9 is fixedly connected to one side of the surface of the pressure storage box 8. The other end of the one-way exhaust pipe 9 passes through the inside of the detection box 1 and is fixedly connected to one side of the surface of the cleaning cover 7. A sampling port 101 is provided inside the detection box 1 where the detection filter 5 is fixedly connected. A fixed connector 102 is fixedly connected to both sides of the surface of the detection box 1 at the top of the auxiliary vibration damping gas collection components 4. In this embodiment: the vibration damping bracket 2, the fixed base plate 3, and the auxiliary vibration damping and gas collection component 4 are used to absorb and reduce the downward force generated by the bumps when the test box 1 is transported and bumps. When the vibration damping spring 202 sleeved on the surface of the vibration damping bracket 2 rebounds and drives the test box 1 to rise, the auxiliary vibration damping and gas collection component 4 further restricts the rebound force to prevent the optical components inside the test box 1, such as the laser spectrometer lens, from shifting or the circuit contact from becoming faulty.

[0032] Among them, the air pressure storage box 8 has a one-way air inlet 801 on both sides near the bottom, a pressure gauge 802 on the top of the air pressure storage box 8, a pressure relief valve 803 on the top of the air pressure storage box 8 near the pressure gauge 802, and an exhaust valve 901 on the one-way exhaust pipe 9 near the air pressure storage box 8. In this embodiment, the pressure relief valve 803 helps to release the pressure when the internal pressure of the air pressure storage box 8 is high, thus avoiding the internal pressure of the air pressure storage box 8 from affecting the vibration reduction effect of the test box 1.

[0033] Among them, a sealing plug 8031 ​​is movably sleeved inside the pressure relief valve 803, a resistance spring 8032 is fixedly connected to the top of the sealing plug 8031, the other end of the resistance spring 8032 is fixedly connected to the top of the pressure relief valve 803, and a pressure relief hole 8033 is opened on the surface of the pressure relief valve 803 near the top. In this embodiment, the sealing plug 8031, the resistance spring 8032, and the pressure relief hole 8033 facilitate the pressure relief when the internal pressure of the air pressure storage box 8 exceeds the threshold. The air pressure will push the sealing plug 8031 ​​up and compress the resistance spring 8032, thereby allowing the air pressure inside the air pressure storage box 8 to be discharged through the pressure relief hole 8033 to complete the pressure relief.

[0034] The cleaning cover 7 has a cleaning cavity 701 inside, an air inlet 702 at the location where the one-way exhaust pipe 9 is fixedly connected to the cleaning cover 7, and cleaning nozzles 703 arranged in a regular pattern are provided around the inner wall of the cleaning cover 7. In this embodiment, the cleaning hood 7 allows the cleaning gas discharged through the cleaning hood 7 to impact the filter membrane 6 in the reverse direction when cleaning is required, thereby removing the dust adhering to its surface and reducing the number of manual cleaning steps.

[0035] The cleaning nozzle 703 includes a nozzle body 7031, a baffle plate 7032 is fixedly connected to one side of the nozzle body 7031, and a one-way exhaust valve core 7033 is movably sleeved on the top of the baffle plate 7032. In this embodiment, the cleaning nozzle 703 facilitates the reverse impact of the cleaning gas discharged through the cleaning hood 7 on the filter membrane 6 when cleaning is required, thereby removing the dust adhering to its surface and reducing the number of manual cleaning steps.

[0036] Among them, the fixed base plate 3 is fixedly connected to the auxiliary vibration damping and gas collection component 4 at each position, and the support plate 301 is fixedly sleeved inside the support plate 301. The vibration damping bracket 2 includes a vibration damping cavity tube 201, a vibration damping spring 202 is movably sleeved inside the vibration damping cavity tube 201, and a vibration damping piston rod 203 is movably sleeved on the surface of the vibration damping cavity tube 201. In this embodiment, the support plate 301 and the cleaning net 302 help to support the position of the auxiliary vibration damping and air collection component 4, and the air entering the auxiliary vibration damping and air collection component 4 is filtered and cleaned by the cleaning net 302 and the cleaning filter element 12.

[0037] Among them, an inflation plug rod assembly 13 is movably sleeved inside the auxiliary vibration damping and gas collection component 4 near the top position; a one-way air guide pipe 11 is fixedly connected to the surface of the auxiliary vibration damping and gas collection component 4 near the air pressure storage box 8; a one-way air inlet bend pipe 10 is fixedly connected to the surface of the auxiliary vibration damping and gas collection component 4 away from the one-way air guide pipe 11; a cleaning filter element 12 is fixedly connected to the bottom position of the auxiliary vibration damping and gas collection component 4; and the other end of the one-way air inlet bend pipe 10 is fixedly connected to the surface of the cleaning filter element 12 near the top position. In this embodiment, the cleaning filter 12 and the one-way air inlet bend 10 facilitate the delivery of the cleaned and filtered air into the auxiliary vibration damping and air collection assembly 4, making it easier to collect and use the clean air in the future.

[0038] The inflation rod assembly 13 includes a fixed push rod 1301, a handle 1302 fixedly connected to the top of the fixed push rod 1301, piston inflation rods 1303 fixedly connected to both sides of the bottom of the fixed push rod 1301, threaded grooves 1305 opened on the surface of the piston inflation rod 1303 near the top, and limit nuts 1306 movably sleeved on the surface of the threaded grooves 1305. A sealing rubber plug 1304 is fixedly connected to one end of the piston inflation rod 1303 inside the one-way valve core 14. A circular through hole 401 is opened at the top of the auxiliary vibration damping and air collection assembly 4. One-way valve cores 14 are opened inside the one-way air inlet bend pipe 10 and the one-way air guide pipe 11. The one-way valve core 14 includes a one-way sealing block 1401, and a rotating air guide plate 1402 is movably connected to one side of the one-way sealing block 1401. In this embodiment: the inflation plug rod assembly 13 is used to drive the inflation plug rod assembly 13 to move up and down when the test box 1 vibrates during transportation, thereby absorbing and reducing the force of vibration and driving external air to be adsorbed and filtered into the auxiliary vibration damping and air collection assembly 4 for collection. The air then passes through the one-way valve core 14 inside the air inlet bend pipe 10 and the one-way air guide pipe 11 to prevent air backflow from affecting subsequent cleaning and use.

[0039] The cleaning filter element 12 is fixedly connected to the one-way air intake bend pipe 10 and has a cleaning exhaust port 1201. An activated carbon core 1203 is fixedly sleeved inside the cleaning filter element 12. A non-powered fan 1204 is fixedly connected to the bottom of the activated carbon core 1203. A cleaning brush rod 1205 is provided on the side of the non-powered fan 1204 away from the activated carbon core 1203. In this embodiment: the cleaning brush rod 1205 on one side of the non-powered fan 1204 helps the non-powered fan 1204 to drive the cleaning brush rod 1205 to rotate when air is intake, thereby cleaning the surface of the cleaning mesh 301 and preventing it from being blocked by dust and affecting the intake of air.

[0040] Working principle of the invention: First, when the testing box 1 is transported and experiences bumps and vibrations, the downward force of the testing box 1 compresses the damping spring 202 and the damping piston rod 203. This causes the damping spring 202 to compress the damping piston rod 203 and enter the damping cavity tube 201. Simultaneously, the fixed connector 102 on the surface of the testing box 1 drives the piston inflation rod 1303 and the sealing rubber plug 1304, which are limited by the limit nut 1306, into the auxiliary damping air collection assembly 4. This causes the air inside the auxiliary damping air collection assembly 4 to be compressed and enter the air pressure storage tank 8 through the one-way valve core 14 inside the one-way air guide pipe 11. At this time, the one-way valve core 14 inside the one-way air intake return pipe 10 closes the one-way air intake return pipe 10. At the same time, the downward force of the testing box 1 is further limited by the gas flow speed. Then, when the damping piston rod 203 rebounds and pushes the damping spring 202 and the testing box 1 to rise, the testing box 1 drives the inflation plug rod assembly 13 to assist in the process. The vibration damping and air collection assembly 4 rises up, and then the one-way valve core 14 inside the one-way air guide pipe 11 blocks the one-way air guide pipe 11. At this time, the one-way air intake bend pipe 10 drives the air inside the cleaning filter element 12 to be drawn into the auxiliary vibration damping and air collection assembly 4. At the same time, the external air is filtered by the support plate 301 inside the fixed base plate 3, so that the filtered air enters the cleaning filter element 12 and drives the non-powered fan 1204 to rotate. The non-powered fan 1204 drives the cleaning brush rod 1205 to clean the surface of the support plate 301. Then, the pre-filtered air is filtered again by the activated carbon core 1203 and sent into the one-way air intake bend pipe 10, so that the air inside the auxiliary vibration damping and air collection assembly 4 is relatively clean. Then, the rate at which the air enters the auxiliary vibration damping and air collection assembly 4 further limits the rebound force of the vibration damping piston rod 203, so that the bumps and vibrations received by the detection box 1 are absorbed and reduced, thereby avoiding optical components such as laser spectrometer lens misalignment or poor circuit contact. Then, the clean air inside the auxiliary vibration damping and air collection component 4 is sent into the pressure storage tank 8 through the one-way air guide pipe 11 for storage during the bumpy vibration. At the same time, the pressure value inside the pressure storage tank 8 can be monitored in real time by the pressure gauge 802. When the pressure value inside the pressure storage tank 8 exceeds the threshold, the pressure inside the pressure storage tank 8 will push the sealing plug 8031 ​​up and squeeze the resistance spring 8032, so that the sealing plug 8031 ​​reaches the top position of the pressure relief hole 8033 to release pressure. Then, when the pressure value returns to normal, the resistance spring 8032 will push again. The sealing plug 8031 ​​is reset and pressure relief is stopped. Then, when the test box 1 needs to be cleaned for frequent testing of automobile exhaust, the exhaust valve 901 at the top of the one-way exhaust pipe 9 is turned so that the clean air inside the air pressure storage box 8 reaches the air inlet hole 702 through the one-way exhaust pipe 9, which pressurizes the air inside the cleaning cavity 701. Then, the one-way exhaust valve core 7033 inside the cleaning nozzle 703 is blown to one side and rotated so that the clean air enters the sampling port 101 and blows back towards the filter membrane 6, thereby blowing off the dust on the surface of the filter membrane 6 and completing the cleaning operation. Then, when cleaning is required and the internal pressure of the air storage tank 8 is insufficient, rotate the limit nut 1306 to remove the position restriction between the piston inflation rod 1303 and the fixed connector 102. Then, hold the handle 1302 to drive the fixed push rod 1301 to pull up and down, so that the fixed push rod 1301 drives the piston inflation rod 1303 and the sealing rubber plug 1304 to extend and retract up and down inside the auxiliary vibration damping air collection assembly 4, thereby manually pressurizing and inflating the air storage tank 8 for subsequent cleaning operations.

[0041] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting automobile exhaust emissions, comprising a detection chamber (1), characterized in that: The test chamber (1) has vibration damping brackets (2) fixedly connected to the four corners of its bottom. A fixed base plate (3) is fixedly connected to the bottom of each vibration damping bracket (2). Auxiliary vibration damping and gas collection components (4) are fixedly connected to the top of both sides of the fixed base plate (3). A test filter (5) is fixedly connected to one side of the inside of the test chamber (1). A filter membrane (6) is provided inside the test chamber (1) at the location where the test filter (5) is fixedly connected. A cleaning cover (7) is provided around the surface of the filter membrane (6) inside the test chamber (1). A pressure storage box (8) is fixedly connected to both sides of the surface and to the middle position adjacent to the auxiliary vibration damping gas collection component (4). A one-way exhaust pipe (9) is fixedly connected to one side of the surface of the pressure storage box (8). The other end of the one-way exhaust pipe (9) passes through the inside of the detection box (1) and is fixedly connected to one side of the surface of the cleaning cover (7). A sampling port (101) is opened inside the detection filter (5) fixedly connected to the detection box (1). Fixed connectors (102) are fixedly connected to both sides of the surface of the detection box (1) at the top position of the auxiliary vibration damping gas collection component (4).

2. The detection device for automobile exhaust gases according to claim 1, characterized in that: The air pressure storage box (8) has one-way air inlets (801) on both sides near the bottom, a pressure gauge (802) on the top of the air pressure storage box (8), a pressure relief valve (803) on the top of the air pressure storage box (8) near the pressure gauge (802), and an exhaust valve (901) on the side of the one-way exhaust pipe (9) near the air pressure storage box (8).

3. The detection device for automobile exhaust gases according to claim 2, characterized in that: The pressure relief valve (803) has a sealing plug (8031) movably sleeved inside. A resistance spring (8032) is fixedly connected to the top of the sealing plug (8031). The other end of the resistance spring (8032) is fixedly connected to the top of the pressure relief valve (803). A pressure relief hole (8033) is opened on the surface of the pressure relief valve (803) near the top.

4. The detection device for automobile exhaust gases according to claim 1, characterized in that: The cleaning cover (7) has a cleaning cavity (701) inside, and an air inlet hole (702) is provided at the position where the cleaning cover (7) is fixedly connected to the one-way exhaust pipe (9). Cleaning nozzles (703) are arranged in a regular pattern around the inner wall of the cleaning cover (7).

5. The detection device for automobile exhaust gases according to claim 4, characterized in that: The cleaning nozzle (703) includes a nozzle body (7031), a baffle plate (7032) is fixedly connected to one side of the nozzle body (7031), and a one-way exhaust valve core (7033) is movably sleeved on the top of the baffle plate (7032).

6. The detection device for automobile exhaust gases according to claim 1, characterized in that: The fixed base plate (3) is fixedly connected to the auxiliary vibration damping and gas collection component (4) with a support plate (301) at each position. A cleaning net (302) is fixedly sleeved inside the support plate (301). The vibration damping bracket (2) includes a vibration damping cavity tube (201). A vibration damping spring (202) is movably sleeved inside the vibration damping cavity tube (201). A vibration damping piston rod (203) is movably sleeved on the surface of the vibration damping cavity tube (201).

7. The detection device for automobile exhaust gases according to claim 1, characterized in that: An inflation plug assembly (13) is movably sleeved inside the auxiliary vibration damping and gas collection assembly (4) near the top position. One-way air guide pipes (11) are fixedly connected to the surface of the auxiliary vibration damping and gas collection assembly (4) near the air pressure storage box (8). One-way air inlet bend pipes (10) are fixedly connected to the surface of the auxiliary vibration damping and gas collection assembly (4) away from the one-way air guide pipes (11). A cleaning filter element (12) is fixedly connected to the bottom position of the auxiliary vibration damping and gas collection assembly (4). The other end of the one-way air inlet bend pipe (10) is fixedly connected to the surface of the cleaning filter element (12) near the top position.

8. The detection device for automobile exhaust gases according to claim 7, characterized in that: The inflation rod assembly (13) includes a fixed push rod (1301), a handle (1302) is fixedly connected to the top of the fixed push rod (1301), and piston inflation rods (1303) are fixedly connected to both sides of the bottom of the fixed push rod (1301). Threaded grooves (1305) are formed on the surface of the piston inflation rods (1303) near the top, and limit nuts (1306) are movably fitted onto the surface of each threaded groove (1305). 1303) A sealing rubber plug (1304) is fixedly connected to one end of the one-way valve core (14). A circular through hole (401) is opened at the top of the auxiliary vibration damping gas collection assembly (4). A one-way valve core (14) is opened inside the one-way air inlet bend pipe (10) and the one-way air guide pipe (11). The one-way valve core (14) includes a one-way sealing block (1401). A rotating air guide plate (1402) is movably connected to one side of the one-way sealing block (1401).

9. A detection device for automobile exhaust gases according to claim 7, characterized in that: The cleaning filter element (12) is fixedly connected to the one-way air intake bend pipe (10) and has a cleaning exhaust port (1201). An activated carbon core (1203) is fixedly sleeved inside the cleaning filter element (12). A non-powered fan (1204) is fixedly connected to the bottom of the activated carbon core (1203). A cleaning brush rod (1205) is provided on the side of the non-powered fan (1204) away from the activated carbon core (1203).

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