Nitrogen dioxide detection device for automobile exhaust

Abstract

The utility model discloses a nitrogen dioxide detection device for automobile exhaust, and relates to the technical field of automobile exhaust detection. One side of the outer wall of the analysis and detection equipment is fixedly connected with a first hose through a connecting pipe; one end of the outer wall of the first hose is fixedly connected with a detection pipe; one end of the outer wall of the detection pipe is fixedly connected with a collection probe through a second hose; the connection pipe and the first hose are communicated with each other; the detection pipe and the second hose are communicated with the collection probe; the outer side wall of the detection tube is fixedly connected with a guide plate through a first square block; according to the utility model, the worm is rotated to drive the worm gear to rotate, and the worm gear rotates to drive the rotating rod and the acquisition probe to rotate, so that the angle of the acquisition probe is changed, and the upward inclination angle of the acquisition probe can better acquire the tail gas in the automobile tail gas exhaust pipe, so that the detected data is more accurate, and meanwhile, the detection accuracy is improved. The angle of the acquisition probe is not required to be changed by manually pressing the detection tube.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile exhaust detection, in particular to a nitrogen dioxide detection device for automobile exhaust. Background Art

[0002] Cars need to detect the emission concentration of these pollutants so that cars with pollutant emissions exceeding the standard will be prohibited from use, thereby protecting human health and the ecological environment.

[0003] Most of the sampling probes of the prior art automobile exhaust nitrogen dioxide detection devices cannot change their angles. When the sampling probe is placed in the automobile exhaust pipe for sampling, because the automobile exhaust pipe is curved and the sampling probe needs to be placed at a certain depth for sampling, when the sampling probe is placed in the automobile exhaust pipe for sampling, in order to make the detected automobile exhaust emission concentration more accurate, most of them need to manually press the sampling tube or press the sampling tube with an object to tilt the sampling probe upward, so that the sampling probe can collect automobile exhaust more accurately. Because automobile exhaust detection takes a long time, when the sampling tube is manually pressed to tilt the sampling probe upward to collect exhaust, the staff will inhale a large amount of automobile exhaust, which is easy to cause harm to the staff's health, and pressing it with an object will easily lead to inaccurate detection results.

[0004] In view of the above technical problems, this application proposes a solution. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the sampling probes of the nitrogen dioxide detection devices for automobile exhaust in the prior art are mostly unable to change their angles, so that when the sampling probe is put into the automobile exhaust pipe for sampling, because the automobile exhaust pipe is curved and the sampling probe needs to be placed at a certain depth for sampling, when the sampling probe is put into the automobile exhaust pipe for sampling, in order to make the detected automobile exhaust emission concentration more accurate, it is mostly necessary to manually press the sampling tube or press the sampling tube with an object to make the sampling probe tilt upward, so that the sampling probe can collect automobile exhaust more accurately. Since automobile exhaust detection takes a long time, when the sampling tube is manually pressed to make the sampling probe tilt upward to collect exhaust, the staff will inhale a large amount of automobile exhaust, which is easy to cause harm to the health of the staff, and pressing it with an object will easily lead to inaccurate detection results. A nitrogen dioxide detection device for automobile exhaust is proposed.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A nitrogen dioxide detection device for automobile exhaust, comprising an analysis and detection device; a first hose is fixedly connected to one side of the outer wall of the analysis and detection device through a connecting pipe; a detection tube is fixedly connected to one end of the outer wall of the first hose; a collection probe is fixedly connected to one end of the outer wall of the detection tube through a second hose, and the connecting pipe and the first hose and the detection tube and the second hose and the collection probe are all interconnected; a guide plate is fixedly connected to the outer wall of the detection tube through a first block; a circular rod is rotatably connected to one side of the outer wall of the guide plate, and one end of the outer wall of the circular rod is rotatably connected to the outer wall of the collection probe; a rotating rod is fixedly connected to the outer wall of the collection probe, and the rotating rod and the circular rod are in the same plane; a worm wheel is fixedly connected to one end of the outer wall of the rotating rod; the outer wall of the detection tube is rotatably connected to a worm through a second block, and the worm wheel and the worm are meshed with each other.

[0008] Preferably, the detection tube includes a fixed tube and a telescopic tube; the inner wall of the telescopic tube is slidably connected to the outer wall of the fixed tube; a group of positioning grooves are opened at the top end of the outer wall of the fixed tube; a first through groove is opened at the top end of the outer wall of the telescopic tube; a round shell is fixedly connected to the outer wall of the telescopic tube, and the round shell is connected to the first through groove; a positioning block is fixedly connected to the top end of the inner wall of the round shell through a first spring, and the positioning block matches the positioning groove; a stretching rod is fixedly connected to the top end of the outer wall of the positioning block, and the top end of the outer wall of the stretching rod passes through the round shell.

[0009] Preferably, the outer wall of the telescopic tube is fixedly connected to a guide plate; the outer wall of the guide plate is slidably connected to a clamping plate; a square plate is provided on one side of the outer wall of the guide plate; a second spring is fixedly connected to the bottom end of the outer wall of the square plate, and the bottom end of the outer wall of the second spring is fixedly connected to the top end of the outer wall of the clamping plate.

[0010] Preferably, an arc-shaped groove is provided at the bottom end of the outer wall of the clamping plate; an inclined surface is provided at one end of the outer wall of the clamping plate; and the guide plate and the clamping plate are in a cross shape.

[0011] Preferably, one side of the outer wall of the square plate is slidably connected to one side of the outer wall of the guide plate; a threaded rod is threadedly connected to the top of one side of the outer wall of the guide plate through a third block, and the bottom end of the outer wall of the threaded rod is rotatably connected to the top of the outer wall of the square plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. When the collection probe and a part of the detection tube are placed into the exhaust pipe of the automobile, the elastic force of the second spring will squeeze the clamping plate, so that the clamping plate cooperates with the part of the detection tube placed in the exhaust pipe of the automobile to clamp the exhaust pipe of the automobile, so that the collection probe and the detection tube can be temporarily fixed in the exhaust pipe of the automobile, so that when collecting automobile exhaust, there is no need to manually hold the fixed detection tube, and when collecting automobile exhaust, the collection probe can collect the exhaust gas more stably, so that the detection effect of the device is better.

[0014] 2. By rotating the threaded rod, since the threaded rod is threadedly connected to the third block, the rotation of the threaded rod will cause the threaded rod to move up and down. Since the threaded rod is rotationally connected to the square plate, the up and down movement of the threaded rod will drive the square plate to move up and down, thereby causing the square plate to drive the second spring and the clamping plate to move up and down, so that the device can adjust the position of the clamping plate, so that when the device detects nitrogen dioxide in automobile exhaust, the position of the clamping plate can be adjusted according to the model of the automobile exhaust pipe and environmental requirements, so that the clamping plate can be more stably fixed on the automobile exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the detection tube, the second hose and the collection probe of the utility model;

[0018] Figure 3 It is a schematic diagram of the top view of the detection tube, the collection probe and the worm of the utility model;

[0019] Figure 4 It is a schematic diagram of the exploded structure of the fixed tube, the telescopic tube, the round shell and the positioning block of the utility model;

[0020] Figure 5 It is a schematic diagram of the exploded structure of the guide plate and the clamping plate of the utility model.

[0021] In the figure: 1. analysis and detection equipment; 2. first hose; 3. detection tube; 4. second hose; 5. collection probe; 6. guide plate; 7. round rod; 8. rotating rod; 9. worm gear; 10. worm; 301. fixed tube; 302. telescopic tube; 11. positioning groove; 12. first through groove; 13. round shell; 14. positioning block; 15. stretching rod; 16. guide plate; 17. clamping plate; 18. square plate; 19. arc groove; 20. inclined surface; 21. threaded rod. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 5As shown, a nitrogen dioxide detection device for automobile exhaust comprises an analysis and detection device 1; a first hose 2 is fixedly connected to one side of the outer wall of the analysis and detection device 1 through a connecting pipe; a detection tube 3 is fixedly connected to one end of the outer wall of the first hose 2; a collection probe 5 is fixedly connected to one end of the outer wall of the detection tube 3 through a second hose 4, and the connecting pipe and the first hose 2 and the detection tube 3 and the second hose 4 and the collection probe 5 are all interconnected; a guide plate 6 is fixedly connected to the outer wall of the detection tube 3 through a first block; a circular rod 7 is rotatably connected to one side of the outer wall of the guide plate 6, and one end of the outer wall of the circular rod 7 is rotatably connected to the outer wall of the collection probe 5; a rotating rod 8 is fixedly connected to the outer wall of the collection probe 5, and the rotating rod 8 and the circular rod 7 are in the same plane; a worm gear 9 is fixedly connected to one end of the outer wall of the rotating rod 8; The outer wall of the measuring tube 3 is rotatably connected with a worm 10 through a second block, and the worm 10 is meshed with the worm wheel 9. By rotating the worm 10, the worm 10 and the worm wheel 9 are meshed with each other, so that the rotation of the worm 10 drives the worm wheel 9 to rotate, and the rotation of the worm wheel 9 drives the rotating rod 8 and the collection probe 5 to rotate, thereby changing the angle of the collection probe 5, so that the upward tilt angle of the collection probe 5 can better collect the exhaust gas in the automobile exhaust pipe, so that the detection data is more accurate, so that the device does not need to manually press the detection tube 3 to change the angle of the collection probe 5, making the device more convenient, and also preventing the staff from inhaling automobile exhaust gas due to the need to change the angle of the collection probe 5, and the detection tube 3 includes a fixed tube 301 and a telescopic tube 302; the telescopic The inner wall of the tube 302 is slidably connected to the outer wall of the fixed tube 301; a group of positioning grooves 11 are opened at the top of the outer wall of the fixed tube 301; a first through groove 12 is opened at the top of the outer wall of the telescopic tube 302; a round shell 13 is fixedly connected to the outer wall of the telescopic tube 302, and the round shell 13 is connected to the first through groove 12; a positioning block 14 is fixedly connected to the top of the inner wall of the round shell 13 through a first spring, and the positioning block 14 matches the positioning groove 11; a stretching rod 15 is fixedly connected to the top of the outer wall of the positioning block 14, and the top of the outer wall of the stretching rod 15 passes through the round shell 13, and the detection tube 3 includes a fixed tube 301 and a telescopic tube 302, and the fixed tube 301 and the telescopic tube 302 are slidably connected, so that when the device needs to change the length of the detection tube 3, the stretching rod 15 is pulled , so that the stretching rod 15 drives the positioning block 14 to move out of the positioning groove 11, thereby releasing the fixation of the fixed tube 301 and the telescopic tube 302, and then adjusting the length between the fixed tube 301 and the telescopic tube 302. After the adjustment, the stretching rod 15 is released, and the first spring will bounce the positioning block 14 into the positioning groove 11, so that the fixed tube 301 and the telescopic tube 302 are fixed together, so that the device can change the length of the detection tube 3 according to the length and specific needs of the automobile exhaust pipe, so that the device can adjust the length of the detection tube 3 according to the needs of different models of automobile exhaust pipes, so that the detection result of the device is more accurate, and the application range of the device is increased, making the device more practical, and the guide plate 16 is fixedly connected to the outer wall of the telescopic tube 302;The outer wall of the guide plate 16 is slidably connected with a clamping plate 17; a square plate 18 is provided on one side of the outer wall of the guide plate 16; a second spring is fixedly connected to the bottom end of the outer wall of the square plate 18, and the bottom end of the outer wall of the second spring is fixedly connected to the top end of the outer wall of the clamping plate 17. When the collection probe 5 and a part of the detection tube 3 are placed in the exhaust pipe of the automobile, the elastic force of the second spring will squeeze the clamping plate 17, so that the clamping plate 17 cooperates with the part of the detection tube 3 placed in the exhaust pipe of the automobile to clamp the exhaust pipe of the automobile, so that the collection probe 5 and the detection tube 3 can be temporarily fixed in the exhaust pipe of the automobile, so that when collecting automobile exhaust, there is no need to manually hold the fixed detection tube 3, and when collecting automobile exhaust, the collection probe 5 can collect exhaust more stably, so that The detection effect of the present invention is better, and the outer wall side of the square plate 18 is slidably connected to the outer wall side of the guide plate 16; the top of the outer wall side of the guide plate 16 is threadedly connected with a threaded rod 21 through a third block, and the bottom end of the outer wall of the threaded rod 21 is rotatably connected to the top of the outer wall of the square plate 18. By rotating the threaded rod 21, since the threaded rod 21 is threadedly connected to the third block, the rotation of the threaded rod 21 will cause the threaded rod 21 to move up and down. Since the threaded rod 21 is rotatably connected to the square plate 18, the up and down movement of the threaded rod 21 will drive the square plate 18 to move up and down, so that the square plate 18 drives the second spring and the clamping plate 17 to move up and down, so that the present invention can adjust the position of the clamping plate 17, so that the present invention can detect the second spring in the automobile exhaust. When nitrogen oxides are released, the position of the clamping plate 17 can be adjusted according to the model of the automobile exhaust pipe and environmental requirements, so that the clamping plate 17 can be fixed on the automobile exhaust pipe more stably, and the elastic force of the second spring can be increased by adjusting the position of the square plate 18, so that the elastic force of the second spring is reduced due to long-term use, so that when the clamping force of the clamping plate 17 is insufficient, the clamping force of the clamping plate 17 can be increased by adjusting the position of the square plate 18, thereby increasing the service life of the second spring and the clamping plate 17, and an arc groove 19 is opened at the bottom end of the outer wall of the clamping plate 17; an inclined surface 20 is opened at one end of the outer wall of the clamping plate 17; the guide plate 16 and the clamping plate 17 are in a cross shape, and an arc groove 19 is opened at the bottom end of the outer wall of the clamping plate 17 due to automobile exhaust The tube is in a round shape, so that when the clamping plate 17 clamps and fixes the automobile exhaust pipe, the arc surface can have more contact points and surfaces with the automobile exhaust pipe, so that the clamping effect is better. The outer wall of the clamping plate 17 is provided with a slope 20, so that when the detection tube 3 is placed in the automobile exhaust pipe, when the automobile exhaust pipe encounters the clamping plate 17, the detection tube 3 continues to move, so that the detection tube 3 drives the clamping plate 17 to move. Due to the slope 20 of the clamping plate 17, when the slope 20 encounters the automobile exhaust pipe, the clamping plate 17 will slowly move upward along the slope 20 until the automobile exhaust pipe cannot block the clamping plate 17. At this time, the elastic force of the second spring will squeeze the clamping plate 17, so that the clamping plate 17 squeezes and fixes the automobile exhaust pipe, so that the clamping plate 17 does not need manual assistance when fixing. ;

[0024] Working principle: When the detection tube 3 and the collection probe 5 are placed in the exhaust pipe of the automobile to collect exhaust gas, the detection tube 3 includes a fixed tube 301 and a telescopic tube 302, and the fixed tube 301 and the telescopic tube 302 are slidably connected. When the device needs to change the length of the detection tube 3, the stretching rod 15 is pulled, so that the stretching rod 15 drives the positioning block 14 to move out of the positioning groove 11, thereby releasing the fixation of the fixed tube 301 and the telescopic tube 302, and then adjusts the length between the fixed tube 301 and the telescopic tube 302. After the adjustment, the stretching rod 15 is released. At this time, the first spring will bounce the positioning block 14 into the positioning groove 11, so that the fixed tube 301 and the telescopic tube 302 are fixed together, so that the device can change the detection tube according to the length of the automobile exhaust pipe and specific needs. 3, the device can adjust the length of the detection tube 3 according to the needs of different types of automobile exhaust pipes, so that the detection result of the device is more accurate, and the application range of the device is increased, making the device more practical. When the length of the detection tube 3 is adjusted, the collection probe 5 and a part of the detection tube 3 are placed in the automobile exhaust pipe. At this time, the elastic force of the second spring will squeeze the clamping plate 17, so that the clamping plate 17 cooperates with the part of the detection tube 3 placed in the automobile exhaust pipe to clamp the automobile exhaust pipe, so that the collection probe 5 and the detection tube 3 can be temporarily fixed in the automobile exhaust pipe, so that when collecting automobile exhaust, there is no need to manually hold the fixed detection tube 3, and when collecting automobile exhaust, the collection probe 5 can collect the exhaust gas more stably. , so that the detection effect of the device is better, and an arc groove 19 is opened at the bottom end of the outer wall of the clamping plate 17. Because the automobile exhaust pipe is round, the clamping plate 17 can have more contact points and surfaces with the automobile exhaust pipe through the arc surface when clamping and fixing the automobile exhaust pipe, so that the clamping effect is better. An inclined surface 20 is opened at one end of the outer wall of the clamping plate 17, so that when the detection tube 3 is placed in the automobile exhaust pipe, when the automobile exhaust pipe encounters the clamping plate 17, the detection tube 3 continues to move, so that the detection tube 3 drives the clamping plate 17 to move. Because of the inclined surface 20 of the clamping plate 17, when the inclined surface 20 encounters the automobile exhaust pipe, the clamping plate 17 will slowly move upward along the inclined surface 20 until the automobile exhaust pipe can no longer block the clamping plate 17. At this time, the elastic force of the second spring will squeeze The clamping plate 17 is used to squeeze and fix the automobile exhaust pipe, so that the clamping plate 17 does not need manual assistance when being fixed. When the collection probe 5 is fixed by the clamping plate 17 and is relatively stable, the worm 10 is rotated. Since the worm 10 and the worm wheel 9 are meshed with each other, the rotation of the worm 10 drives the worm wheel 9 to rotate, and the rotation of the worm wheel 9 drives the rotating rod 8 and the collection probe 5 to rotate, thereby changing the angle of the collection probe 5, so that the upward tilt angle of the collection probe 5 can better collect the exhaust gas in the automobile exhaust pipe, so that the detection data is more accurate, so that the device does not need to manually press the detection tube 3 to change the angle of the collection probe 5, making the device more convenient, and also preventing the staff from inhaling automobile exhaust gas due to the need to change the angle of the collection probe 5.Because the collection probe 5 is limited by the guide plate 6, the rotation of the worm 10 and the worm wheel 9 will only cause the collection probe 5 to rotate, and will not cause the collection probe 5 to shift. In addition, the collection probe 5 and the detection tube 3 are connected through the second hose 4, so that when the collection probe 5 rotates, the flexibility of the second hose 4 can support the rotation of the collection probe 5. In addition, by rotating the threaded rod 21, since the threaded rod 21 is threadedly connected to the third block, the rotation of the threaded rod 21 will cause the threaded rod 21 to move up and down. Since the threaded rod 21 is rotatably connected to the square plate 18, the up and down movement of the threaded rod 21 will drive the square plate 18 to move up and down, so that the square plate 18 drives the second spring and the clamping plate 17 to move up and down, so that the device can adjust the clamping The position of the holding plate 17 allows the device to adjust the position of the clamping plate 17 according to the model of the automobile exhaust pipe and environmental requirements when detecting nitrogen dioxide in automobile exhaust gas, so that the clamping plate 17 can be fixed on the automobile exhaust pipe more stably, and the elastic force of the second spring can be increased by adjusting the position of the square plate 18, so that the elastic force of the second spring is reduced due to long-term use, so that when the clamping force of the clamping plate 17 is insufficient, the clamping force of the clamping plate 17 can be increased by adjusting the position of the square plate 18, thereby increasing the service life of the second spring and the clamping plate 17, so that the device is not only more accurate in detecting nitrogen dioxide in automobile exhaust gas, but also does not need to be manually held, thereby ensuring the health of the staff.

[0025] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A nitrogen dioxide detection device for automobile exhaust, comprising an analysis and detection device (1); a first hose (2) is fixedly connected to one side of the outer wall of the analysis and detection device (1) through a connecting pipe; a detection tube (3) is fixedly connected to one end of the outer wall of the first hose (2); a collection probe (5) is fixedly connected to one end of the outer wall of the detection tube (3) through a second hose (4), and the connecting pipe and the first hose (2) and the detection tube (3) and the second hose (4) and the collection probe (5) are all interconnected; characterized in that The outer wall of the detection tube (3) is fixedly connected to a guide plate (6) via a first block; a circular rod (7) is rotatably connected to one side of the outer wall of the guide plate (6), and one end of the outer wall of the circular rod (7) is rotatably connected to the outer wall of the collection probe (5); a rotating rod (8) is fixedly connected to the outer wall of the collection probe (5), and the rotating rod (8) and the circular rod (7) are in the same plane; a worm wheel (9) is fixedly connected to one end of the outer wall of the rotating rod (8); and a worm (10) is rotatably connected to the outer wall of the detection tube (3) via a second block, and the worm (10) and the worm wheel (9) are meshed with each other.

2. A nitrogen dioxide detection device for automobile exhaust according to claim 1, characterized in that: The detection tube (3) comprises a fixed tube (301) and a telescopic tube (302); the inner wall of the telescopic tube (302) is slidably connected to the outer wall of the fixed tube (301); a group of positioning grooves (11) are provided at the top of the outer wall of the fixed tube (301); a first through groove (12) is provided at the top of the outer wall of the telescopic tube (302); a round shell (13) is fixedly connected to the outer wall of the telescopic tube (302), and the round shell (13) is connected to the first through groove (12); a positioning block (14) is fixedly connected to the top of the inner wall of the round shell (13) through a first spring, and the positioning block (14) matches the positioning groove (11); a stretching rod (15) is fixedly connected to the top of the outer wall of the positioning block (14), and the top of the outer wall of the stretching rod (15) passes through the round shell (13).

3. A nitrogen dioxide detection device for automobile exhaust according to claim 2, characterized in that: The outer wall of the telescopic tube (302) is fixedly connected to a guide plate (16); the outer wall of the guide plate (16) is slidably connected to a clamping plate (17); a square plate (18) is provided on one side of the outer wall of the guide plate (16); a second spring is fixedly connected to the bottom end of the outer wall of the square plate (18), and the bottom end of the outer wall of the second spring is fixedly connected to the top end of the outer wall of the clamping plate (17).

4. A nitrogen dioxide detection device for automobile exhaust according to claim 3, characterized in that: An arc groove (19) is provided at the bottom end of the outer wall of the clamping plate (17); an inclined surface (20) is provided at one end of the outer wall of the clamping plate (17); and the guide plate (16) and the clamping plate (17) are in a cross shape.

5. A nitrogen dioxide detection device for automobile exhaust according to claim 4, characterized in that: One side of the outer wall of the square plate (18) is slidably connected to one side of the outer wall of the guide plate (16); a threaded rod (21) is threadedly connected to the top of one side of the outer wall of the guide plate (16) through a third block, and the bottom end of the outer wall of the threaded rod (21) is rotatably connected to the top of the outer wall of the square plate (18).

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