Vehicle exhaust gas detection device

Abstract

The present invention provides a vehicle exhaust detection device, which relates to the technical field of exhaust detection, including a gas analyzer, wherein a connecting pipe is provided at the front end of the gas analyzer, and an air intake assembly is provided on the outside of the connecting pipe, and the air intake assembly includes a receiving pipe, one end of the receiving pipe is slidably plugged with an inserting pipe, and the other end of the receiving pipe is slidably plugged with a push rod, and the push rod and the inner diameter of the inserting pipe are the same. Compared with the prior art, the air intake assembly can be inserted into the exhaust pipe to receive the exhaust gas, and the exhaust gas is sent into the gas analyzer for internal detection through the connection between the air supply assembly and the connecting pipe. After each detection is completed, the air intake assembly is retracted and its inner wall is automatically cleaned. Two groups of air supply assemblies are used interchangeably to keep the interior clean by cleaning. At the same time, multiple branch pipes disperse and transport the exhaust gas, which is convenient for dissipating most of the heat of the high-temperature exhaust gas and avoiding damage to the electronic components inside the analyzer.

Description

Technical Field

[0001] The present invention relates to the technical field of exhaust gas detection, and in particular to a vehicle exhaust gas detection device. Background Art

[0002] Environmental monitoring instruments vary widely, including various organic matter detectors and water pollution monitors. Automobile exhaust also has a certain impact on the environment, so there are also instruments specifically designed to detect it. Five-gas analyzers measure exhaust from in-use vehicles and can measure CO2, CO, NOX, O2, and HC in gasoline engine exhaust. Exhaust gas measurements are typically performed by directly extending the exhaust analyzer sampling probe into the exhaust pipe to measure exhaust composition.

[0003] In the existing process of detecting automobile exhaust, it is necessary to manually insert a detection tube into the exhaust pipe to collect the exhaust gas. During this process, the exhaust gas may contain oily particles and be sucked into the interior of the detection tube. If it is not cleaned for a long time, it is easy to affect the normal use of the detection tube. The exhaust gas generally has a certain temperature. If the temperature is too high, it is easy to damage the electronic components of the instrument if it is directly sent into the detection instrument. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a vehicle exhaust gas detection device to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. The air intake component can be inserted into the exhaust pipe to receive the exhaust gas, and the exhaust gas is sent into the gas analyzer for internal detection through the connection between the air supply component and the connecting pipe. After each detection is completed, the air intake component is retracted to automatically clean its inner wall, and the two groups of air supply components are used interchangeably to keep the interior clean by cleaning. At the same time, multiple branch pipes disperse and transport the exhaust gas, which is convenient for dissipating most of the heat of the high-temperature exhaust gas and avoiding damage to the electronic components inside the analyzer.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a vehicle exhaust gas detection device, including a gas analyzer, a connecting pipe is provided at the front end of the gas analyzer, and an air intake assembly is provided on the outside of the connecting pipe, the air intake assembly includes a receiving pipe, one end of the receiving pipe is slidably plugged with an insert pipe, and the other end of the receiving pipe is slidably plugged with a push rod, the push rod and the insert pipe have the same inner diameter size, two groups of air supply assemblies are provided between the tail end of the receiving pipe and the connecting pipe, the air supply assembly includes two connecting disks, a plurality of branch pipes are symmetrically installed between the center of the circle of the two connecting disks, and plug ends are installed at both ends of the branch pipes, The plug-in end is inserted into the storage tube and the connecting tube, and a water collection pan is provided at the bottom of the air supply assembly, and a drainage pipe is provided on one side of the water collection pan. A shaft rod is installed between the two groups of the air supply assemblies, and the connecting pan is slidably installed on the shaft rod. The top of the water collection pan is located at both ends of the shaft rod and symmetrically fixed with telescopic plates, and the two ends of the shaft rod are rotatably connected to the extended ends of the telescopic plates through bearings, and the top of the telescopic plates are fixedly connected to the bottoms of the storage tube and the connecting tube respectively, and a driving assembly is provided at the top of the air supply assembly, and the driving assembly includes a top frame, and the two ends of the top frame are fixed to the tops of the storage tube and the connecting tube, and the storage tube and the connecting tube are in the same straight line.

[0006] Furthermore, a second electric push rod is fixed to one side of the water collection tray located on the receiving tube, and the extended end of the second electric push rod is fixedly connected to the bottom of the receiving tube, and a hose is fixed between the air inlet of the gas analyzer and the connecting tube.

[0007] Furthermore, the air intake assembly also includes a cover, which is sleeved on the outer side of the front end of the cannula, and two-way electric push rods are fixed on both sides of the storage tube, one end of the two-way electric push rod is fixedly connected to the rear end of the cover of the cannula, and the other end of the two-way electric push rod is fixed with a fixing plate, and the fixing plate is fixedly connected to the outer end of the push rod.

[0008] Furthermore, a collecting plate is fixed to the tail end of the storage tube, the top rod and the plug end are plugged into the surface of the collecting plate, and the air supply component is plugged into the connecting plate at the tail end of the storage tube and a movable notch is provided at the position of the fixed plate.

[0009] Furthermore, the air supply component also includes a socket, and a socket is provided at the center of the circle of one end of the connecting plate for inserting into the storage tube, and the push rod slides through the inside of the socket, and an elastic tube is fixed between the plug end and the branch tube.

[0010] Furthermore, a lower connecting frame is fixed to the bottom of the connecting disk, and an upper connecting frame is fixed to the top of the connecting disk. A sliding groove is provided on the surface of the shaft corresponding to the position of the lower connecting frame, and the lower connecting frame slides along the inside of the sliding groove.

[0011] Furthermore, the driving assembly also includes a movable groove, a movable groove is opened on the surface of the top frame, and a bidirectional screw is rotatably installed inside the movable groove through a bearing. The bidirectional screw and the shaft are both driven by a motor, and two screw blocks are symmetrically threaded on the surface of the bidirectional screw.

[0012] Furthermore, a push plate is fixed to the bottom of the screw block, and the push plate is in compression contact with the outer surface of the upper end connecting frame.

[0013] Furthermore, a circular plate is fixed to one end of the inserting tube inserted into the interior of the receiving tube, and the circular plate is slidably connected to the inner wall of the receiving tube.

[0014] Furthermore, the bottom of one end of the shaft is located on the outside of the connecting plate and is rotatably installed with a water supply plate through a bearing seat, and a plurality of water outlets are evenly spaced on the surface of the water supply plate. The water outlets are in the same straight line as the plug-in end and the branch pipe, and a water inlet pipe is fixed on the outside of the water supply plate.

[0015] Beneficial effects of the present invention:

[0016] 1. The present invention uses a second electric push rod to drive the storage tube to move up and down, and the telescopic plate extends or shortens synchronously. When the connecting tube moves, it maintains connection with the gas analyzer through a hose, and can be adjusted according to the position of the automobile exhaust pipe, so that the front end of the intake assembly can be smoothly inserted into the exhaust pipe to collect exhaust gas.

[0017] 2. After the detection is completed, the bidirectional electric push rod of the present invention is retracted, thereby driving the circular ring plate at the tail end of the cannula to slide along the inner wall of the storage tube, cleaning the inner wall of the storage tube, and pushing the cleaned particulate impurities to the side of the collection plate. When moving, the push rod will be inserted into the inside of the cannula and clean out the impurities inside the cannula from the front end. The moving gap of the connecting plate can avoid the movement interference between the bidirectional electric push rod and the push rod connection position, which makes the two sets of air supply components unable to rotate and replace.

[0018] 3. The present invention drives the two screw blocks to slide along the slide groove through the rotation of the bidirectional screw, and pushes the upper end connecting frame to move through the push plate at the bottom of the screw block, so that the elastic tube is unfolded, and the connecting plate is pushed into the tail end of the storage tube. The plug-in end is inserted into the corresponding circular hole of the collection plate and connected with the inside of the storage tube. The other side is connected with the connecting tube in the same way to realize the connection of the entire gas pipeline. When the screw block is retracted, the elasticity of the elastic tube automatically separates the connecting plate from the storage tube, which is convenient for replacing the two sets of air supply components by rotating it through the shaft.

[0019] 4. In the present invention, after the air supply component rotates to the lower end along with the shaft, the connecting plate will correspond to the water supply plate. At this time, the water outlet is close to the plug-in end, and clean water is sent to the water supply pipe through the water inlet pipe. It flows into the inside of the branch pipe through the water outlet and flows out from the plug-in end at the other end. It is collected on the water accumulation plate to clean the inside of the branch pipe. At the same time, the temperature of the branch pipe is lowered by cold water so that the air supply component can use its own low temperature to neutralize the temperature of the exhaust gas when it is used next time.

[0020] 5. Compared with the prior art, the air intake assembly of the present invention can be inserted into the exhaust pipe to receive the exhaust gas, and the exhaust gas is sent into the gas analyzer for internal detection through the connection between the air supply assembly and the connecting pipe. After each detection is completed, the air intake assembly is retracted and its inner wall is automatically cleaned. The two groups of air supply assemblies are used interchangeably to keep the interior clean by cleaning. At the same time, multiple branch pipes disperse and transport the exhaust gas, which is convenient for dissipating most of the heat of the high-temperature exhaust gas and avoiding damage to the electronic components inside the analyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a vehicle exhaust detection device according to the present invention;

[0022] Figure 2 This is a schematic diagram showing the connection between an air intake assembly, an air delivery assembly, and a gas analyzer of a vehicle exhaust gas detection device according to the present invention;

[0023] Figure 3 This is a schematic diagram of the top structure of a water collection tray of a vehicle exhaust gas detection device according to the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of a driving component of a vehicle exhaust detection device according to the present invention;

[0025] Figure 5 This is a schematic structural diagram of an air supply component of a vehicle exhaust detection device according to the present invention;

[0026] Figure 6 This is a schematic diagram of the connection between the air supply component and the drive component of a vehicle exhaust detection device of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of an air intake assembly of a vehicle exhaust detection device according to the present invention;

[0028] Figure 8 This is a schematic diagram of the connection between the intubation tube and the push rod of a vehicle exhaust detection device of the present invention.

[0029] In the figure: 1. Gas analyzer; 11. Hose; 12. Connecting pipe; 2. Air intake assembly; 21. Storage tube; 22. Insert tube; 23. Cover; 24. Bidirectional electric push rod; 25. Second electric push rod; 26. Collecting tray; 27. Circular plate; 28. Push rod; 29. ​​Fixed plate; 210. Moving notch; 3. Air supply assembly; 31. Connecting plate; 32. Socket; 33. Plug end; 34. Elastic tube; 35. Shaft; 36. Lower end connecting frame; 37. Upper end connecting frame; 38. Branch pipe; 39. Slide; 4. Water collection tray; 41. Drain pipe; 42. Water supply tray; 43. Water inlet pipe; 44. Telescopic plate; 45. Water outlet; 5. Drive assembly; 51. Top frame; 52. Moving trough; 53. Bidirectional screw; 54. Screw block; 55. Push plate. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] See also Figures 1 to 8The present invention provides a technical solution: a vehicle exhaust detection device, including a gas analyzer 1, a connecting pipe 12 is provided at the front end of the gas analyzer 1, and an air intake assembly 2 is provided on the outside of the connecting pipe 12, the air intake assembly 2 includes a receiving tube 21, one end of the receiving tube 21 is slidably plugged with an inserting tube 22, and the other end of the receiving tube 21 is slidably plugged with a push rod 28, the push rod 28 has the same inner diameter as the inserting tube 22, and two groups of air supply assemblies 3 are provided between the tail end of the receiving tube 21 and the connecting pipe 12, the air supply assembly 3 includes two connecting plates 31, a plurality of branch pipes 38 are symmetrically installed between the center of the circle of the two connecting plates 31, and plug ends 33 are installed at both ends of the branch pipes 38, the plug ends 33 are inserted into the inside of the receiving tube 21 and the connecting pipe 12, a water collection tray 4 is provided at the bottom of the air supply assembly 3, and a drainage pipe 41 is provided on one side of the water collection tray 4, and a shaft rod 35 is installed between the two groups of air supply assemblies 3. The connecting plate 31 is slidably mounted on the shaft 35, and the top of the water collection tray 4 is symmetrically fixed with telescopic plates 44 at both ends of the shaft 35, and the two ends of the shaft 35 are rotatably connected to the extended ends of the telescopic plates 44 through bearings, and the top of the telescopic plates 44 are respectively fixedly connected to the bottom of the storage tube 21 and the connecting tube 12. A driving assembly 5 is provided on the top of the air supply assembly 3, and the driving assembly 5 includes a top frame 51, and the two ends of the top frame 51 are fixed to the top of the storage tube 21 and the connecting tube 12, and the storage tube 21 and the connecting tube 12 are in the same straight line. When using the device, the car is parked near the intake assembly 2, and after the cannula 22 of the intake assembly 2 is inserted into the exhaust pipe, the tail end of the intake assembly 2 is connected to the air supply assembly 3, and then connected to the gas analyzer 1, and the exhaust gas is sucked in by the built-in fan of the gas analyzer 1 to detect the substance content in the exhaust gas. After the detection is completed, the intake assembly 2 is retracted and self-cleaning is completed, and the two sets of air supply assemblies 3 are used interchangeably.

[0032] In this embodiment, the water collection tray 4 is fixed with a second electric push rod 25 on one side of the storage tube 21, and the extended end of the second electric push rod 25 is fixedly connected to the bottom of the storage tube 21. A hose 11 is fixed between the air inlet of the gas analyzer 1 and the connecting tube 12. The storage tube 21 is driven to move up and down by the second electric push rod 25, and the telescopic plate 44 is synchronously extended or shortened. When the connecting tube 12 moves, it maintains the connection with the gas analyzer 1 through the hose 11, and can be adjusted according to the position of the automobile exhaust pipe, so that the front end of the intake assembly 2 can be smoothly inserted into the exhaust pipe to collect exhaust gas.

[0033] In this embodiment, the air intake component 2 also includes a cover 23, and the front end outer side of the cannula 22 is sleeved with a cover 23, and two sides of the storage tube 21 are fixed with a two-way electric push rod 24, one end of the two-way electric push rod 24 is fixedly connected to the rear end of the cover 23 of the cannula 22, and the other end of the two-way electric push rod 24 is fixed with a fixing plate 29, and the fixing plate 29 is fixedly connected to the outer end of the push rod 28, and the tail end of the storage tube 21 is fixed with a collecting tray 26, and the push rod 28 and the plug end 33 are plugged into the surface of the collecting tray 26, and the air supply component 3 is plugged into the connecting disk 31 at the tail end of the storage tube 21, and a movable notch 210 is opened at the position of the fixing plate 29, and the cannula 22 is plugged into the storage tube 21. One end is fixed with a circular plate 27, and the circular plate 27 and the storage tube The inner wall of the storage tube 21 is slidably connected. When in use, the two-way electric push rod 24 pushes the cannula 22 and the push rod 28 to pass through the front and rear ends of the storage tube 21 respectively. The cannula 22 can be inserted into the exhaust pipe of the car and wrapped around the outer periphery of the exhaust pipe through the cover 23 to receive the exhaust gas. After the detection is completed, the two-way electric push rod 24 is retracted, thereby driving the annular plate 27 at the tail end of the cannula 22 to slide along the inner wall of the storage tube 21, cleaning the inner wall of the storage tube 21, and pushing the cleaned particulate impurities to one side of the collection plate 26. The push rod 28 will be inserted into the inside of the cannula 22 when moving, and clean out the impurities inside the cannula 22 from the front end. The moving notch 210 of the connecting plate 31 can avoid the movement interference of the connection position of the two-way electric push rod 24 and the push rod 28, which makes the two sets of air supply components 3 unable to rotate and replace.

[0034] The cam 35 is provided with a screw thread 32 for receiving the cam 35, and the cam 35 is provided with a screw thread 32 for receiving the cam 35. The cam 35 is provided with a screw thread 32 for receiving the cam 35, and the cam 35 is provided with a screw thread 32 for receiving the cam 35. When the screw block 54 is retracted, the connecting plate 31 is automatically separated from the storage tube 21 by the elasticity of the elastic tube 34, making it convenient to drive it to rotate by the shaft 35 to replace the two sets of gas supply components 3.

[0035] In this embodiment, the bottom of one end of the shaft 35 is located on the outside of the connecting plate 31 and is rotatably installed with a water supply plate 42 through a bearing seat, and a plurality of water outlets 45 are equidistantly arranged on the surface of the water supply plate 42. The water outlet 45 is in the same line as the plug-in end 33 and the branch pipe 38. A water inlet pipe 43 is fixed to the outside of the water supply plate 42. After the air supply component 3 rotates to the lower end along with the shaft 35, the connecting plate 31 will correspond to the water supply plate 42. At this time, the water outlet 45 is close to the plug-in end 33, and clean water is sent to the water supply pipe through the water inlet pipe 43. It flows into the inside of the branch pipe 38 through the water outlet 45 and flows out from the plug-in end 33 at the other end. It is collected on the water accumulation tray 4 to clean the inside of the branch pipe 38. At the same time, the temperature of the branch pipe 38 is lowered by cold water so that the air supply component 3 can use its own low temperature to neutralize the temperature of the exhaust gas when it is used next time.

[0036] When the device is used, the car is parked near the air intake assembly 2, and the bidirectional electric push rod 24 pushes the cannula 22 and the push rod 28 to pass through the front and rear ends of the receiving tube 21 respectively. The cannula 22 can be inserted into the exhaust pipe of the car and wrapped around the outer periphery of the exhaust pipe through the cover 23 to receive the exhaust gas. After the detection is completed, the bidirectional electric push rod 24 is retracted, thereby driving the annular plate 27 at the tail end of the cannula 22 to slide along the inner wall of the receiving tube 21, cleaning the inner wall of the receiving tube 21 and pushing the cleaned particulate impurities to the side of the collection tray 26, while the push rod 28 is inserted into the cannula 22 when moving, and the inside of the cannula 22 is filled with air. The impurities are cleaned out from the front end, and the moving notch 210 of the connecting plate 31 can prevent the two-way electric push rod 24 from interfering with the connection position of the push rod 28, resulting in the two sets of air supply components 3 being unable to rotate and replace. Because the branch pipe 38 and the plug end 33 are connected by an elastic tube 34, the elastic tube 34 is a material with a certain degree of elasticity. In the initial state, the elastic tube 34 is in a contracted state, and the plug end 33 is close to the branch pipe 38. After rotating to the top, the two screw blocks 54 are driven to slide along the slide groove 39 by the rotation of the two-way screw 53, and the upper end connecting frame 3 is pushed by the push plate 55 at the bottom of the screw block 54. 7 moves, so that the elastic tube 34 is unfolded, and the connecting plate 31 is pushed into the tail end of the receiving tube 21. The plug end 33 is inserted into the corresponding circular hole of the collecting plate 26 and communicates with the inside of the receiving tube 21. The other side is connected with the connecting tube 12 in the same way to realize the connection of the entire gas pipeline. When the screw block 54 is retracted, the elasticity of the elastic tube 34 automatically separates the connecting plate 31 from the receiving tube 21, which is convenient for the shaft 35 to drive it to rotate and replace the two sets of gas supply components 3. Then the gas analyzer 1 is connected, and the exhaust gas is sucked in by the built-in fan of the gas analyzer 1 to detect the substance content in the exhaust gas. After the test is completed, the air intake component 2 is retracted and self-cleaning is completed. The two sets of air supply components 3 are used interchangeably. After the air supply component 3 rotates to the lower end along with the shaft 35, the connecting plate 31 will correspond to the water supply plate 42. At this time, the water outlet 45 is close to the plug-in end 33, and clean water is sent to the water supply pipe through the water inlet pipe 43. It flows into the inside of the branch pipe 38 through the water outlet 45 and flows out from the plug-in end 33 at the other end. It is collected on the water accumulation tray 4 to clean the inside of the branch pipe 38. At the same time, the temperature of the branch pipe 38 is lowered by cold water so that the air supply component 3 can use its own low temperature to neutralize the temperature of the exhaust gas when it is used next time.

[0037] The basic principles, main features and advantages of the present invention are shown and described above. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0038] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A vehicle exhaust gas detection device, comprising a gas analyzer (1), characterized in that: The front end of the gas analyzer (1) is provided with a connecting tube (12), and an air intake assembly (2) is provided on the outside of the connecting tube (12), the air intake assembly (2) includes a receiving tube (21), one end of the receiving tube (21) is slidably plugged with a cannula (22), and the other end of the receiving tube (21) is slidably plugged with a push rod (28), the push rod (28) and the cannula (22) have the same inner diameter size, two groups of air supply assemblies (3) are provided between the tail end of the receiving tube (21) and the connecting tube (12), the air supply assembly (3) includes two connecting disks (31), a plurality of branch tubes (38) are symmetrically installed between the two connecting disks (31), and plug ends (33) are installed at both ends of the branch tubes (38), the plug ends ( 33) is inserted into the receiving tube (21) and the connecting tube (12), the bottom of the air supply component (3) is provided with a water collection tray (4), and a drainage pipe (41) is provided on one side of the water collection tray (4), a shaft (35) is installed between the two groups of the air supply components (3), the connecting tray (31) is slidably installed on the shaft (35), the top of the water collection tray (4) is symmetrically fixed with telescopic plates (44) at both ends of the shaft (35), and the two ends of the shaft (35) are rotatably connected to the extended end of the telescopic plate (44) through bearings, the top of the telescopic plate (44) is fixedly connected to the bottom of the receiving tube (21) and the connecting tube (12), respectively, the top of the air supply component (3) is provided with a driving component (5), and the driving component (5) includes a top frame (51 ), the two ends of the top frame (51) are fixed on the top of the storage tube (21) and the connecting tube (12), and the storage tube (21) and the connecting tube (12) are on the same straight line, the air intake assembly (2) also includes a cover (23), the front end of the insert tube (22) is sleeved with the cover (23), two sides of the storage tube (21) are fixed with a two-way electric push rod (24), one end of the two-way electric push rod (24) is fixedly connected to the rear end of the cover (23) of the insert tube (22), and the other end of the two-way electric push rod (24) is fixed with a fixing plate (29), the fixing plate (29) is fixedly connected to the outer end of the top rod (28), the air supply assembly (3) also includes a socket (32), the connecting plate (31) is inserted into the storage tube (21 ) is provided with a socket (32) at the center of one end thereof, and the top rod (28) slides through the inside of the socket (32), an elastic tube (34) is fixed between the plug end (33) and the branch pipe (38), a circular ring plate (27) is fixed to one end of the plug pipe (22) plugged into the inside of the receiving pipe (21), and the circular ring plate (27) is slidably connected to the inner wall of the receiving pipe (21), the bottom of one end of the shaft rod (35) is located on the outside of the connecting plate (31) and is rotatably mounted with a water supply plate (42) through a bearing seat, and a plurality of water outlets (45) are equidistantly arranged on the surface of the water supply plate (42), the water outlets (45) are in the same straight line as the plug end (33) and the branch pipe (38), and a water inlet pipe (43) is fixed to the outside of the water supply plate (42).The ejector rod (28) is inserted into the interior of the cannula (22) when it moves, and removes impurities inside the cannula (22) from the front end.

2. A vehicle exhaust gas detection device according to claim 1, characterized in that: The water collection tray (4) is located on one side of the receiving tube (21) and is fixed with a second electric push rod (25), and the extended end of the second electric push rod (25) is fixedly connected to the bottom of the receiving tube (21), and a hose (11) is fixed between the air inlet of the gas analyzer (1) and the connecting tube (12).

3. The vehicle exhaust gas detection device according to claim 1, characterized in that: A collecting plate (26) is fixed to the tail end of the receiving tube (21), the push rod (28) and the plug end (33) are plugged into the surface of the collecting plate (26), and a movable notch (210) is provided at a position of the connecting plate (31) plugged into the tail end of the receiving tube (21) corresponding to the fixed plate (29).

4. The vehicle exhaust gas detection device according to claim 1, characterized in that: A lower connecting frame (36) is fixed to the bottom of the connecting disk (31), and an upper connecting frame (37) is fixed to the top of the connecting disk (31). A sliding groove (39) is provided on the surface of the shaft (35) at a position corresponding to the lower connecting frame (36), and the lower connecting frame (36) slides inside the sliding groove (39).

5. The vehicle exhaust gas detection device according to claim 4, characterized in that: The driving assembly (5) further comprises a movable groove (52), the movable groove (52) being provided on the surface of the top frame (51), and a bidirectional screw (53) being rotatably mounted inside the movable groove (52) via a bearing, the bidirectional screw (53) and the shaft (35) being driven by a motor, and two screw blocks (54) being symmetrically threadedly sleeved on the surface of the bidirectional screw (53).

6. The vehicle exhaust gas detection device according to claim 5, characterized in that: A push plate (55) is fixed to the bottom of the screw block (54), and the push plate (55) is in extrusion contact with the outer surface of the upper end connecting frame (37).

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