Automobile emission pollutant analysis and detection device

Abstract

The invention discloses an automobile emission pollutant analysis and detection device, and relates to the technical field of automobile exhaust detection, and the automobile emission pollutant analysis and detection device comprises a detector body; the side, away from the detector body, of the first conveying pipe is fixedly connected with a dilution assembly, the dilution assembly comprises a first connecting block, the first connecting block is fixedly connected with the first conveying pipe, the side, away from the first conveying pipe, of the first connecting block is fixedly connected with a uniform mixing chamber, and the middle of the upper end of the first connecting block is fixedly connected with a controller; the upper part of the connecting block I is symmetrically and fixedly connected with concentration detectors. The controller can control the air flow control valve to operate, then the air flow control valve can control the flow of air conveyed into an inner cavity of the uniform mixing chamber, the two concentration detectors are matched, the concentration of tail gas can be monitored, and therefore the concentration of the tail gas can be monitored according to the dilution proportion. The tail gas dilution precision of the dilution assembly is improved, so that the final detection precision can be improved, and the tail gas can be continuously diluted in the conveying path through the uniform mixing chamber.

Description

Technical Field

[0001] The invention relates to the technical field of automobile exhaust detection, and in particular to an automobile exhaust pollutant analysis and detection device. Background Art

[0002] The analysis and testing of automobile emission pollutants uses professional equipment and technology to accurately measure harmful components such as carbon monoxide, hydrocarbons, nitrogen oxides and particulate matter in exhaust gas. It aims to comprehensively evaluate the emission performance of vehicles and their potential impact on the atmospheric environment and human health. This is not only a key measure to protect the environment, but also can promptly detect and reduce excessive emissions, effectively alleviating urban air pollution.

[0003] In the analysis and detection of automobile exhaust pollutants, exhaust gas dilution is a core step, and its importance is self-evident. The main purposes of dilution are two-fold: first, to avoid nucleation, that is, to reduce the nucleation phenomenon caused by the saturation of volatile substances in the exhaust gas during the cooling and dilution process, thereby inhibiting the formation of a large number of ultrafine particles, which pose a particularly serious threat to the environment and human health; secondly, dilution can significantly improve the detection accuracy by making the concentration distribution of pollutants in the exhaust gas more uniform, providing more accurate and stable measurement conditions for the detection equipment, while reducing the risk of wear and blockage of equipment by solid particles.

[0004] However, some current automobile emission pollutant analysis and detection devices show obvious deficiencies in exhaust gas dilution treatment. These devices generally ignore the continuous dilution process of exhaust gas in the transportation path, and tend to implement a one-time dilution before detection. This practice leads to multiple problems. First, one-time dilution often leads to uneven distribution of pollutant concentrations in the exhaust gas, thereby weakening the accuracy of the test results. Secondly, in the face of exhaust emission fluctuations caused by changes in complex factors such as load and speed during actual vehicle driving, the one-time dilution method cannot fully capture these dynamic characteristics, limiting the comprehensiveness and effectiveness of the detection.

[0005] Chinese patent document CN220271276U discloses an automobile emission pollutant analysis and detection device, including a sleeve, the top and the left sides of the bottom of the sleeve are both threadedly connected with a threaded rod, the right side of the sleeve is provided with a detection box, the side of the threaded rod close to the detection box penetrates into the inner cavity of the sleeve and is movably connected to a movable plate through a bearing, and the side of the movable plate away from the threaded rod is fixedly connected with an anti-slip tooth plate; however, there are still the following defects in the implementation process:

[0006] The device in the above-mentioned document can connect the entire detection device to the exhaust emission point of a car and prevent it from falling off. However, the device in the above-mentioned document dilutes the exhaust gas multiple times during the process of transporting the exhaust gas to the device for detection, resulting in a high concentration of exhaust gas transported to the inner cavity of the device, which can easily cause inaccurate detection results and damage to the device, affecting the service life of the device. Summary of the invention

[0007] The purpose of the present invention is to provide a vehicle emission pollutant analysis and detection device to solve the problems raised in the above background technology.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0009] A device for analyzing and detecting automobile exhaust pollutants comprises a detector body; a delivery pipe 1 is plugged into one side of the detector body, a dilution assembly is fixedly connected to a side of the delivery pipe 1 away from the detector body, the dilution assembly comprises a connecting block 1, the connecting block 1 is fixedly connected to the delivery pipe 1, a mixing chamber is fixedly connected to a side of the connecting block 1 away from the delivery pipe 1, a controller is fixedly connected to the middle of the upper end of the connecting block 1, a concentration detector is symmetrically fixedly connected to the upper part of the connecting block 1, an air flow control valve is fixedly connected to one side of the upper end of the connecting block 1, an air filter chamber assembly is fixedly connected to an input end of the air flow control valve, and a sampling assembly is fixedly connected to a side of the connecting block 1 away from the delivery pipe 1.

[0010] A further improvement of the technical solution of the present invention is that the sampling component includes a second filter component, the second filter component is fixedly connected to a delivery pipe 2 on the side away from the connecting block 1, the middle of the delivery pipe 2 is fixedly connected to a block component, and the input end of the delivery pipe 2 is fixedly connected to the first filter component.

[0011] The above-mentioned technical scheme is adopted. In this scheme, the second filter component can filter impurities such as fine particles in the exhaust gas to prevent these impurities from being transported to the inside of the detector body and then causing damage to the components inside the detector body. The block component can be used to easily connect the sampling component to the exhaust pipe of the automobile to prevent the sampling component from falling off the exhaust pipe of the automobile during the detection process; and the block component can be connected to the exhaust pipe through the block component, and then the first filter component can be located in the center of the exhaust pipe, thereby improving the efficiency and quality of the sampling of the first filter component, and the automobile exhaust gas can be sampled and transported through the first filter component, and then the automobile exhaust gas can be filtered and intercepted by the first filter component, and large particles of impurities in the exhaust gas can be intercepted to prevent these large particles of impurities from being transported along with the exhaust gas and then transported for a long time, causing blockage inside the pipeline, etc.

[0012] A further improvement of the technical solution of the present invention is that the second filter component includes a connecting tube 1 and a connecting tube 2, the connecting tube 1 is fixedly connected to the opposite surfaces of the connecting tube 2, the side of the inner cavity of the connecting tube 1 away from the connecting tube 2 is fixedly connected to the connecting tube 3, the side of the connecting tube 1 away from the connecting tube 2 is fixedly connected to the delivery tube 2, the inner cavity of the delivery tube 2 is communicated with the inner cavity of the connecting tube 3, the outer surface of the connecting tube 3 is threadedly connected with a filter element, and the inner cavity of the filter element is communicated with the inner cavity of the connecting tube 3.

[0013] The above-mentioned technical scheme is adopted, in which connecting pipe one and connecting pipe two are fixedly connected by flanges and bolts, so that connecting pipe two and connecting pipe one are conveniently separated, the filter core is threadedly connected to connecting pipe three, and then the inner cavity of delivery pipe two is communicated with the inner cavity of connection pipe three, so that the exhaust gas delivered to the inner cavity of delivery pipe two will be delivered to the inner cavity of filter core, and then the exhaust gas is filtered for a second time by the filter core, which can intercept fine particles in the exhaust gas, thereby improving the quality of the delivered exhaust gas, and can reduce or even avoid these fine particles from being delivered to the inside of the detector body, and then causing damage to the components inside the detector body, thereby affecting the service life of the device, and the filter core is threadedly connected to connecting pipe three, so that the filter core is conveniently separated from connecting pipe three, and then it is convenient to deal with dust particles in the inner cavity of the filter core, or replace the filter core.

[0014] A further improvement of the technical solution of the present invention is that the block assembly includes a connecting ring, a plurality of fixed blocks are fixedly connected to the annular array in the inner cavity of the connecting ring, the plurality of fixed blocks are fixedly connected to the second conveying pipe together, and a plurality of limit blocks are fixedly connected to the annular array on one side of the inner cavity of the connecting ring away from the fixed block.

[0015] The above-mentioned technical scheme is adopted, in which a plurality of fixed blocks are fixedly connected in a circular array in the inner cavity of the connecting ring, and then the plurality of fixed blocks are fixedly connected to the second conveying pipe, thereby improving the stability when the connecting ring and the second conveying pipe are connected, and a plurality of limit blocks are fixedly connected in a circular array in the inner cavity of the connecting ring, thereby making it possible to use the limit blocks to connect and fix exhaust pipes of different sizes.

[0016] A further improvement of the technical solution of the present invention is that: the limit block is arranged obliquely, a spring is fixedly connected to one side of the limit block close to the connecting ring, and the spring is fixedly connected to the inner cavity of the connecting ring.

[0017] The above technical solution is adopted, in which the limit block is set at an angle, so that it is convenient to fit the limit block with the outer surface of the exhaust pipe, and then to connect the limit block with the exhaust pipe. By providing a spring, the spring can be used to push the limit block to connect with the outer surface of the exhaust pipe, so that the connection between the limit block and the exhaust pipe can be made more stable.

[0018] A further improvement of the technical solution of the present invention is that the first filter component includes a probe, the probe is fixedly connected to the input end of the second delivery pipe, and the inner cavity of the second delivery pipe is communicated with the inner cavity of the probe, a coarse filter chamber is symmetrically fixedly connected to the side of the probe away from the second delivery pipe, and filter holes are provided on the side of the coarse filter chamber close to the probe.

[0019] The above-mentioned technical scheme is adopted, in which a filter hole is opened on the side of the coarse filter chamber close to the probe, so that large particles of impurities in the exhaust gas can be filtered and intercepted through the filter hole, and then the filtered exhaust gas can flow into the inner cavity of the probe through the filter hole. By setting the side wall connecting the coarse filter chamber and the probe to an inclined state, the exhaust gas can be used to blow the impurities intercepted by the filter hole, making it easier for these impurities to roll into the inner cavity of the coarse filter chamber, thereby reducing the phenomenon of impurities clogging the filter hole.

[0020] A further improvement of the technical solution of the present invention is that: the mixing chamber is fixedly connected to an input end of a delivery pipe, and the inner cavity of the mixing chamber is communicated with an inner cavity of a delivery pipe, the upper part of the mixing chamber is fixedly connected to an output end of an air flow control valve, and the inner cavity of the mixing chamber is communicated with the inner cavity of the air flow control valve, the mixing chamber is fixedly connected to the output end of a second filter component, and the inner cavity of the mixing chamber is communicated with the inner cavity of the second filter component, and a stirring fan is rotatably connected to the inner cavity of the mixing chamber.

[0021] The above-mentioned technical scheme is adopted, in which the air flow control valve is connected with the inner cavity of the mixing chamber, so that clean air can be delivered to the inner cavity of the mixing chamber through the air flow control valve, and then the stirring fan is blown out to rotate. Since the inner cavity of the second filter component is connected with the inner cavity of the mixing chamber, the filtered exhaust gas can be delivered to the inner cavity of the mixing chamber through the second filter component, and then mixed with the clean air delivered by the air flow control valve in the inner cavity of the mixing chamber, so that the exhaust gas can be diluted. Through the cooperation of air and exhaust gas, the stirring fan can be driven to rotate in the inner cavity of the mixing chamber, and then the mixing and dilution of air and exhaust gas can be accelerated.

[0022] A further improvement of the technical solution of the present invention is that the air filter chamber assembly includes a connecting block 2, which is fixedly connected to the input end of the air flow control valve, and the inner cavity of the connecting block 2 is communicated with the inner cavity of the air flow control valve, a dust box is clamped on the side of the connecting block 2 away from the air flow control valve, a filter plate is fixedly connected to the inner cavity of the dust box, and a fan is fixedly connected to the side of the inner cavity of the connecting block 2 away from the air flow control valve.

[0023] The above technical solution is adopted, in which the air drawn by the fan can be filtered and intercepted by the filter plate, and impurities such as dust in the air can be intercepted to prevent these dust ends from entering the inner cavity of the air flow control valve along with the air, and then being transported to the inner cavity of the mixing chamber, and then causing blockage of the device.

[0024] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0025] 1. The present invention provides an automobile emission pollutant analysis and detection device, which can filter and intercept the air delivered to the inner cavity of a mixing chamber through an air filter chamber component, thereby improving the quality of the air, and then the controller can control the operation of an air flow control valve, and then the air flow delivered to the inner cavity of the mixing chamber can be controlled by the air flow control valve, and the concentration of the exhaust gas can be monitored through the cooperation of two concentration detectors, so that the dilution accuracy of the dilution component on the exhaust gas can be improved according to the dilution ratio, thereby improving the final detection accuracy, and the exhaust gas can be continuously diluted in the delivery path through the mixing chamber, and the concentration detector can detect the concentration data of the diluted exhaust gas, and then the exhaust gas can be diluted twice, thereby improving the final detection accuracy and reducing the damage to the device caused by the exhaust gas.

[0026] 2. The present invention provides an automobile emission pollutant analysis and detection device, which can filter impurities such as fine particles in exhaust gas through a second filter component to prevent these impurities from being transported to the inside of the detector body and then damaging the components inside the detector body. The sampling component can be conveniently connected to the exhaust pipe of the automobile through a block component to prevent the sampling component from falling off the exhaust pipe of the automobile during the detection process; and can be connected to the exhaust pipe through the block component, and then the first filter component can be located in the center of the exhaust pipe, thereby improving the efficiency and quality of the sampling of the first filter component, and the automobile exhaust gas can be sampled and transported through the first filter component, and then the automobile exhaust gas can be filtered and intercepted by the first filter component, and large particles of impurities in the exhaust gas can be intercepted to prevent these large particles of impurities from being transported along with the exhaust gas, and then long-term transportation will cause blockage inside the pipeline, thereby affecting the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 3 A schematic diagram of a dilution assembly of the present invention;

[0031] Figure 4 It is a schematic diagram of the sampling assembly of the present invention;

[0032] Figure 5 is a schematic diagram of a second filter assembly of the present invention;

[0033] Figure 6 It is a schematic diagram of a card block assembly of the present invention;

[0034] Figure 7 is a schematic diagram of a first filter assembly of the present invention;

[0035] Figure 8 It is a schematic diagram of a mixing chamber of the present invention;

[0036] Fig. 9 It is a schematic diagram of an air filter chamber assembly of the present invention;

[0037] In the figure: 1. detector body; 2. delivery pipe 1; 3. dilution component; 31. connection block 1; 32. mixing chamber; 321. stirring fan; 33. controller; 34. concentration detector; 35. air filter chamber component; 351. connection block 2; 352. fan; 353. dust collection box; 355. filter plate; 36. air flow control valve; 4. sampling component; 41. second filter component; 411. connection pipe 1; 412. connection pipe 2; 413. filter element; 414. connection pipe 3; 42. delivery pipe 2; 43. block component; 431. connection ring; 432. limit block; 433. fixing block; 44. first filter component; 441. probe; 442. coarse filter chamber. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with embodiments:

[0039] Example 1

[0040] like Figure 1-9 As shown, the present invention provides an automobile emission pollutant analysis and detection device, including a detector body 1; a delivery pipe 2 is inserted into one side of the detector body 1, and a dilution component 3 is fixedly connected to the side of the delivery pipe 2 away from the detector body 1, and the dilution component 3 includes a connecting block 31, the connecting block 31 is fixedly connected to the delivery pipe 2, and a mixing chamber 32 is fixedly connected to the side of the connecting block 31 away from the delivery pipe 2, a controller 33 is fixedly connected to the middle of the upper end of the connecting block 31, and a concentration detector 34 is symmetrically fixedly connected to the upper part of the connecting block 31, an air flow control valve 36 is fixedly connected to one side of the upper end of the connecting block 31, and an air filter chamber component 35 is fixedly connected to the input end of the air flow control valve 36, and a sampling component 4 is fixedly connected to the side of the connecting block 31 away from the delivery pipe 2.

[0041] In this embodiment, the detector body 1 can be used to detect pollutants in automobile exhaust gas, the diluted exhaust gas can be transported to the interior of the detector body 1 through the delivery pipe 2, and then detected by the detector body 1, the filtered exhaust gas can be diluted with clean air through the mixing chamber 32, the controller 33 can control the operation of the air flow control valve 36 according to the concentration and dilution ratio of the automobile exhaust gas, the two concentration detectors 34 can detect the automobile exhaust concentration before dilution and the automobile exhaust concentration after dilution respectively, the air delivered to the inner cavity of the mixing chamber 32 can be filtered through the air filter chamber assembly 35, and impurities such as dust in the air can be intercepted, the air flow control valve 36 can control the air flow into the inner cavity of the mixing chamber 32 according to the dilution ratio, and the sampling assembly 4 can penetrate into the automobile exhaust pipe to sample the automobile exhaust gas.

[0042] Example 2

[0043] like Figure 4 , Figure 6 , Figure 7 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the sampling component 4 includes a second filter component 41, the side of the second filter component 41 away from the connecting block 1 31 is fixedly connected to the second delivery pipe 42, the middle of the second delivery pipe 42 is fixedly connected to the block component 43, the input end of the second delivery pipe 42 is fixedly connected to the first filter component 44, the block component 43 includes a connecting ring 431, the inner cavity of the connecting ring 431 is fixedly connected to a plurality of fixed blocks 433 in an annular array, the plurality of fixed blocks 433 are fixedly connected to the second delivery pipe 42 together, the inner cavity of the connecting ring 431 is fixedly connected to a plurality of limit blocks 432 in an annular array on the side away from the fixed blocks 433, the limit blocks 432 are inclined, and the limit blocks 432 are fixedly connected to a spring on the side close to the connecting ring 431, and the spring is fixedly connected to the inner cavity of the connecting ring 431;

[0044] The first filter assembly 44 includes a probe 441, which is fixedly connected to the input end of the second delivery pipe 42, and the inner cavity of the second delivery pipe 42 is communicated with the inner cavity of the probe 441. A coarse filter chamber 442 is symmetrically fixedly connected to the side of the probe 441 away from the second delivery pipe 42, and a filter hole is opened on the side of the coarse filter chamber 442 close to the probe 441.

[0045] In this embodiment, when it is necessary to analyze and detect the pollutants emitted by the automobile, first, the staff drives the automobile to be tested to the detection area, and then connects the detector body 1 with the delivery pipe 2, then debugs the parameters of the detector body 1, and then inserts the first filter component 44 into the inner cavity of the exhaust pipe of the automobile. During the deepening process, the outer surface of the exhaust pipe of the automobile will exert a force on the limit block 432, driving the limit block 432 to move away from the exhaust pipe, and then under the action of the spring force on the limit block 432, the limit block 432 will be driven to move toward the direction of the automobile exhaust pipe, and then under the action of several limit blocks 432, the block assembly 43 can be connected to the exhaust pipe. Together, the staff then lets the car run, and then the exhaust gas will blow from the inner cavity of the exhaust pipe of the car to the inner cavity of the coarse filter chamber 442, and then the large particles in the exhaust gas transported to the coarse filter chamber 442 can be filtered and intercepted through the filter holes on the coarse filter chamber 442 to prevent long-term use, which will lead to the accumulation of a large number of large particles of impurities, thereby clogging the pipeline and affecting the normal use of the device. Under the flushing effect of the exhaust gas, the particles can be blown into the inner cavity of the coarse filter chamber 442, and then the filtered exhaust gas will be transported to the inner cavity of the probe 441, and then through the cooperation of the probe 441 and the delivery pipe 2 42, the exhaust gas can be transported to the inner cavity of the connecting pipe 3 414.

[0046] Example 3

[0047] like Figure 5 As shown, on the basis of Example 2, the present invention provides a technical solution: preferably, the second filter component 41 includes a connecting tube 1 411 and a connecting tube 2 412, the connecting tube 1 411 is fixedly connected to the opposite surfaces of the connecting tube 2 412, the side of the inner cavity of the connecting tube 1 411 away from the connecting tube 2 412 is fixedly connected to the connecting tube 3 414, the side of the connecting tube 1 411 away from the connecting tube 2 412 is fixedly connected to the conveying tube 2 42, the inner cavity of the conveying tube 2 42 is communicated with the inner cavity of the connecting tube 3 414, the outer surface of the connecting tube 3 414 is threadedly connected with a filter element 413, and the inner cavity of the filter element 413 is communicated with the inner cavity of the connecting tube 3 414.

[0048] In this embodiment, the exhaust gas transported to the inner cavity of the connecting pipe three 414 can be filtered for the second time by the filter element 413, and some fine particles in the exhaust gas can be intercepted to prevent these fine particles and impurities from entering the detector body 1 along with the exhaust gas, and then causing damage to some components inside the detector body 1. When the particulate matter in the inner cavity of the filter element 413 accumulates to a certain amount and needs to be processed or the filter element 413 needs to be replaced, the position limit of the two flanges can be released by turning the bolts, and then the connecting pipe one 411 and the connecting pipe two 412 can be separated, and then the filter element 413 can be separated from the connecting pipe three 414 by rotating the filter element 413, so that the dust in the inner cavity of the filter element 413 can be processed or the filter element 413 can be replaced.

[0049] Example 4

[0050] like Figure 3 , Figure 8 , Fig. 9 As shown, on the basis of Example 3, the present invention provides a technical solution: preferably, the mixing chamber 32 is fixedly connected to the input end of the delivery pipe 2, and the inner cavity of the mixing chamber 32 is communicated with the inner cavity of the delivery pipe 2, the upper part of the mixing chamber 32 is fixedly connected to the output end of the air flow control valve 36, and the inner cavity of the mixing chamber 32 is communicated with the inner cavity of the air flow control valve 36, the mixing chamber 32 is fixedly connected to the output end of the second filter component 41, and the inner cavity of the mixing chamber 32 is communicated with the inner cavity of the second filter component 41, and the inner cavity of the mixing chamber 32 is connected to the inner cavity of the second filter component 41. The stirring fan 321 is rotatably connected, and the air filter chamber assembly 35 includes a connecting block 351, which is fixedly connected to the input end of the air flow control valve 36, and the inner cavity of the connecting block 351 is communicated with the inner cavity of the air flow control valve 36, and a dust box 353 is clamped on the side of the connecting block 351 away from the air flow control valve 36, and a filter plate 355 is fixedly connected to the inner cavity of the dust box 353, and a fan 352 is fixedly connected to the side of the inner cavity of the connecting block 351 away from the air flow control valve 36.

[0051] In this embodiment, the exhaust gas filtered by the filter element 413 is transported to the inner cavity of the mixing chamber 32 through the connecting pipe 412, and then the exhaust gas concentration can be detected by the concentration detector 34. Then, the controller 33 controls the fan 352 to run according to the exhaust gas concentration detected by the concentration detector 34, and the surrounding clean air is extracted by the fan 352, and then filtered by the filter plate 355. The filtered air can be transported to the inner cavity of the mixing chamber 32 through the air flow control valve 36, and then, under the action of the air and the exhaust gas, the stirring fan 321 is driven to rotate in the inner cavity of the mixing chamber 32. The air is then delivered to the inner cavity of the delivery pipe 2, and then the concentration of the diluted exhaust gas is detected by another concentration detector 34, so that the controller 33 can control the operation of the air flow control valve 36 according to the dilution ratio of the concentration, and then the air flow control valve 36 is used to control the air flow delivered to the inner cavity of the mixing chamber 32, so as to further improve the quality of dilution, and then the diluted exhaust gas is delivered to the detector body 1, so that the detector body 1 can be used to detect pollutants in the exhaust gas of the vehicle.

[0052] The working principle of the automobile emission pollutant analysis and detection device is described in detail below.

[0053] like Figure 1-9 As shown, when it is necessary to analyze and detect automobile exhaust pollutants, first, the staff drives the automobile to be tested to the detection area, and then connects the detector body 1 with the delivery pipe 2, then debugs the parameters of the detector body 1, and then inserts the first filter component 44 into the inner cavity of the exhaust pipe of the automobile. During the deepening process, the outer surface of the exhaust pipe of the automobile will exert a force on the limit block 432, driving the limit block 432 to move away from the exhaust pipe, and then under the action of the spring force on the limit block 432, the limit block 432 will be driven to move toward the direction of the automobile exhaust pipe, and then under the action of several limit blocks 432, the block assembly 43 can be connected to the exhaust pipe. Then the staff runs the car, and then the exhaust gas will be blown from the inner cavity of the exhaust pipe of the car to the inner cavity of the coarse filter chamber 442, and then the large particles in the exhaust gas transported to the coarse filter chamber 442 can be filtered and intercepted through the filter holes on the coarse filter chamber 442 to prevent long-term use, which will lead to the accumulation of a large number of large particles of impurities, thereby clogging the pipeline and affecting the normal use of the device. Under the flushing effect of the exhaust gas, the particles can be blown into the inner cavity of the coarse filter chamber 442, and then the filtered exhaust gas will be transported to the inner cavity of the probe 441, and then through the cooperation of the probe 441 and the delivery pipe 2 42, the exhaust gas can be transported to the inner cavity of the connecting pipe 3 414;

[0054] Then, the exhaust gas transported to the inner cavity of the connecting pipe three 414 can be filtered twice by the filter element 413, and some fine particles in the exhaust gas can be intercepted to prevent these fine particles and impurities from entering the detector body 1 together with the exhaust gas, and then damaging some components inside the detector body 1. When the particles in the inner cavity of the filter element 413 accumulate to a certain amount and need to be processed or the filter element 413 needs to be replaced, the position limit of the two flanges can be released by rotating the bolts, and then the connecting pipe one 411 and the connecting pipe two 412 can be separated, and then the filter element 413 can be separated from the connecting pipe three 414 by rotating the filter element 413, so that the dust in the inner cavity of the filter element 413 can be processed, or the filter element 413 can be replaced;

[0055] The exhaust gas filtered by the filter element 413 is transported to the inner cavity of the mixing chamber 32 through the connecting pipe 412, and then the exhaust gas concentration can be detected by the concentration detector 34. Then, the controller 33 controls the fan 352 to run according to the exhaust gas concentration detected by the concentration detector 34, and the surrounding clean air is extracted by the fan 352, and then filtered by the filter plate 355. The filtered air can be transported to the inner cavity of the mixing chamber 32 through the air flow control valve 36, and then, under the action of the air and the exhaust gas, the stirring fan 321 is driven to rotate in the inner cavity of the mixing chamber 32, thereby Air can be used to dilute the concentration of automobile exhaust gas, and then the diluted exhaust gas will be transported to the inner cavity of the delivery pipe 2, and then the diluted exhaust gas concentration will be detected by another concentration detector 34, so that the controller 33 can control the operation of the air flow control valve 36 according to the dilution ratio requirement of the concentration, and then the air flow control valve 36 is used to control the air flow transported to the inner cavity of the mixing chamber 32, so as to further improve the quality of dilution, and then the diluted exhaust gas will be transported to the detector body 1, so that the detector body 1 can be used to detect pollutants in the automobile exhaust gas.

[0056] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A vehicle emission pollutant analysis and detection device, comprising a detector body (1); Features: A delivery tube (2) is plugged into one side of the detector body (1); a dilution assembly (3) is fixedly connected to a side of the delivery tube (2) away from the detector body (1); the dilution assembly (3) comprises a connection block (31); the connection block (31) is fixedly connected to the delivery tube (2); a mixing chamber (32) is fixedly connected to a side of the connection block (31) away from the delivery tube (2); a controller (33) is fixedly connected to the middle of the upper end of the connection block (31); a concentration detector (34) is symmetrically fixedly connected to the upper part of the connection block (31); an air flow control valve (36) is fixedly connected to one side of the upper end of the connection block (31); an air filter chamber assembly (35) is fixedly connected to an input end of the air flow control valve (36); and a sampling assembly (4) is fixedly connected to a side of the connection block (31) away from the delivery tube (2).

2. The vehicle emission pollutant analysis and detection device according to claim 1, Features: The sampling assembly (4) comprises a second filter assembly (41), a side of the second filter assembly (41) away from the connection block (31) being fixedly connected to a second delivery pipe (42), a middle portion of the second delivery pipe (42) being fixedly connected to a block assembly (43), and an input end of the second delivery pipe (42) being fixedly connected to a first filter assembly (44).

3. The vehicle emission pollutant analysis and detection device according to claim 2, Features: The second filter assembly (41) comprises a connecting tube 1 (411) and a connecting tube 2 (412); the connecting tube 1 (411) is fixedly connected to the opposite surface of the connecting tube 2 (412); a connecting tube 3 (414) is fixedly connected to the side of the inner cavity of the connecting tube 1 (411) away from the connecting tube 2 (412); a delivery tube 2 (42) is fixedly connected to the side of the connecting tube 1 (411) away from the connecting tube 2 (412); the inner cavity of the delivery tube 2 (42) is in communication with the inner cavity of the connecting tube 3 (414); a filter core (413) is threadedly connected to the outer surface of the connecting tube 3 (414); and the inner cavity of the filter core (413) is in communication with the inner cavity of the connecting tube 3 (414).

4. The automobile emission pollutant analysis and detection device according to claim 2, Features: The clamping block assembly (43) comprises a connecting ring (431), a plurality of fixing blocks (433) are fixedly connected in an annular array in the inner cavity of the connecting ring (431), the plurality of fixing blocks (433) are fixedly connected to the second conveying pipe (42) together, and a plurality of limiting blocks (432) are fixedly connected in an annular array on a side of the inner cavity of the connecting ring (431) away from the fixing blocks (433).

5. The vehicle emission pollutant analysis and detection device according to claim 4, Features: The limit block (432) is arranged in an inclined manner, and a spring is fixedly connected to one side of the limit block (432) close to the connecting ring (431), and the spring is fixedly connected to the inner cavity of the connecting ring (431).

6. The automobile emission pollutant analysis and detection device according to claim 5, Features: The first filter assembly (44) comprises a probe (441), the probe (441) being fixedly connected to the input end of the second delivery pipe (42), and the inner cavity of the second delivery pipe (42) being communicated with the inner cavity of the probe (441), a coarse filter chamber (442) being symmetrically fixedly connected to the side of the probe (441) away from the second delivery pipe (42), and a filter hole is provided on the side of the coarse filter chamber (442) close to the probe (441).

7. The automobile emission pollutant analysis and detection device according to claim 1, Features: The mixing chamber (32) is fixedly connected to the input end of the conveying pipe (2), and the inner cavity of the mixing chamber (32) is communicated with the inner cavity of the conveying pipe (2). The upper part of the mixing chamber (32) is fixedly connected to the output end of the air flow control valve (36), and the inner cavity of the mixing chamber (32) is communicated with the inner cavity of the air flow control valve (36). The mixing chamber (32) is fixedly connected to the output end of the second filter component (41), and the inner cavity of the mixing chamber (32) is communicated with the inner cavity of the second filter component (41). The inner cavity of the mixing chamber (32) is rotatably connected to a stirring fan (321).

8. The automobile emission pollutant analysis and detection device according to claim 1, Features: The air filter chamber assembly (35) comprises a second connection block (351), wherein the second connection block (351) is fixedly connected to the input end of the air flow control valve (36), and the inner cavity of the second connection block (351) is communicated with the inner cavity of the air flow control valve (36), a dust collecting box (353) is clamped on the side of the second connection block (351) away from the air flow control valve (36), a filter plate (355) is fixedly connected to the inner cavity of the dust collecting box (353), and a fan (352) is fixedly connected to the side of the inner cavity of the second connection block (351) away from the air flow control valve (36).

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