Motor vehicle tail gas collecting and detecting device

Abstract

The utility model discloses a motor vehicle tail gas collecting and detecting device which is characterized in that a tail exhaust pipe is clamped and fixed through a fixing mechanism, so that motor vehicle tail gas stably enters the detecting device; the content of particulate matters in the tail gas is detected through an arranged dust sensor; motor vehicle tail gas is cooled through the cooling pipe, and device damage caused by high temperature is avoided; dust in the tail gas is removed through the dust removal tank, so that the detected tail gas is primarily purified; detecting the content of sulfur dioxide and carbon monoxide through a PH value sensor and a carbon monoxide concentration sensor which are arranged in the detection tank; the detected tail gas is subjected to secondary purification through an activated carbon adsorption plate arranged in the detection tank; certain air pressure is kept in the detection tank through the one-way air valve and the movable cover plate arranged on the detection tank, so that the dissolution rate of sulfur dioxide is increased, and the detection result is more accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor vehicle exhaust detection, and in particular relates to a motor vehicle exhaust gas collection and detection device. Background Art

[0002] The composition of automobile exhaust is complex and contains a variety of compounds. The main harmful substances include particulate matter, carbon monoxide, sulfur dioxide and other substances. Particulate matter is the solid component in the engine exhaust, mainly composed of incompletely burned fuel, lubricating oil and impurities in the air; in internal combustion engines, when there is insufficient air or other reasons that lead to incomplete combustion of fuel, carbon monoxide will be produced; sulfur dioxide is one of the sulfur oxides in motor vehicle exhaust. In order to make the test results more accurate, the above three substances should be tested separately to avoid mutual interference of the test results and to more accurately find the data of substandard emissions. During the test process, the detection device needs to play a certain purification role on the test gas to avoid harm to the test operator.

[0003] After searching, the prior art authorization announcement number CN 221377878 U is an exhaust gas collection device for automobile environmental protection detection, which includes a base, a collection box fixedly installed on the top surface of the base, a detection mechanism arranged inside the collection box, a bellows fixedly connected to the left side of the collection box, a first valve arranged inside the bellows, an air intake hood fixedly connected to one end of the bellows, and a lifting mechanism arranged on the top surface of the base. The height of the air intake hood is adjusted by setting the lifting mechanism so that the air intake hood is aligned with the automobile exhaust pipe, which is convenient for collecting exhaust gas discharged from automobile tail pipes at different heights; the device is provided with a single chamber and a single sensor for detecting exhaust gas, which cannot effectively and comprehensively detect various components in the exhaust gas, and the collected data also has errors.

[0004] After searching, the prior art authorization announcement number CN 219977894 U is a collection device for automobile exhaust detection, which includes a collection bottle, a connecting cylinder is fixedly installed on the top of the collection bottle, a connecting cover is connected to the top of the connecting cylinder through a thread, and a conical cylinder is connected to the top of the connecting cover through a hose; a limit box is fixedly installed on the outer wall of the collection bottle, and a heat insulation board is detachably connected to the bottom of the limit box, and fixing grooves are provided on both sides of the inner wall of the heat insulation board; a limit assembly is provided on the top of the limit box, and a rectangular plate is slidably connected to the top of the limit box; the device has the function of collecting and detecting, but cannot purify the detected gas, and the excess gas is directly discharged from the exhaust pipe to the surrounding environment, causing harm to the health of the detection operator. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a motor vehicle exhaust gas collection and detection device, wherein a fixing mechanism clamps and fixes the vehicle rear exhaust pipe, and is fixedly connected to the vehicle rear exhaust pipe, so that the motor vehicle exhaust gas can stably enter the detection device; the content of particulate matter in the exhaust gas is detected by a provided dust sensor; the motor vehicle exhaust gas is cooled by a cooling pipe; the particulate matter and dust in the exhaust gas are removed by a dust removal tank; the content of sulfur dioxide and carbon monoxide is detected by a detection tank and a pH value sensor and a carbon monoxide concentration sensor provided in the detection tank; the detected exhaust gas is adsorbed and purified by an activated carbon adsorption plate provided in the detection tank; a certain air pressure is maintained in the detection tank by a one-way air valve and a movable cover provided on the detection tank, so as to reduce the detection error caused by the air pressure, increase the dissolution rate of sulfur dioxide, and make the detection result more accurate.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A motor vehicle exhaust gas collection and detection device comprises a rear exhaust pipe, a fixing mechanism, a box body, a dust sensor, a cooling pipe, a dust removal tank, a detection tank, an air outlet pipe, a one-way air valve, a pH sensor, a carbon monoxide concentration sensor, and an air supply pipe; the fixing mechanism is arranged at the front end of the device and fixedly connected to the rear exhaust pipe of the vehicle so that the exhaust gas of the motor vehicle enters the detection device stably, the rear end of the fixing mechanism is connected to the air supply pipe, the front end of the air supply pipe is provided with a dust sensor, the rear end of the air supply pipe is connected to the cooling pipe, the box compartment where the cooling pipe is located has cooling water, the rear end of the cooling pipe is provided with a dust removal tank, the dust removal tank is connected to the detection tank through a pipeline, the air outlet of the dust removal tank is provided with a one-way air valve, the bottom of the detection tank is provided with clean water, the upper end of the detection tank is provided with an air outlet pipe, and the pH sensor and the carbon monoxide concentration sensor are arranged inside the detection tank.

[0008] The fixing mechanism includes a hand-cranked turntable, a two-way screw, a positioning plate I, an arc-shaped fixed plate, a positioning shaft, and a fixed shell; the hand-cranked turntable is arranged on the outside of the fixed shell and is connected to the two-way screw, and two sets of positioning plates I are symmetrically arranged on the two-way screw and are connected to the two-way screw. An arc-shaped fixed plate is provided in the middle of the positioning plate I, and a positioning shaft is also provided at the lower part of the positioning plate I. The positioning shaft is provided in the fixed shell and is slidingly connected to the positioning plate I; the hand-cranked turntable is rotated to drive the two-way screw to rotate, so that the positioning plates I on both sides of the two-way screw move in a centering manner, and the arc-shaped fixed plate provided in the middle of the positioning plate I clamps and fixes the middle vehicle tail exhaust pipe, and is fixedly connected to the vehicle tail exhaust pipe, so that the exhaust gas of the motor vehicle can stably enter the detection device.

[0009] The dust removal tank includes a dust removal tank body, a motor, a main shaft, an air intake fan blade, an ash collecting trough, a cross-shaped connecting plate, a filter plate, and a fan-shaped brush plate; the motor is arranged inside the dust removal tank body, the motor is connected to the main shaft, a cross-shaped connecting plate is provided in the middle of the main shaft, a fan-shaped brush plate is provided below the cross-shaped connecting plate, and an air intake fan blade is also provided on the top of the main shaft, the filter plate is arranged in the dust removal tank body, and an ash collecting trough is provided below the filter plate; the motor drives the air intake fan blade to rotate through the main shaft, and the air intake fan blade draws the gas in the cooling pipe into the dust removal tank, and the gas passes downward through the filter plate, and the filter plate filters the dust particles in the gas, and the motor drives the cross-shaped connecting plate to rotate through the main shaft at the same time, and the cross-shaped connecting plate drives the fan-shaped brush plate to clean the filter plate, and the accumulated dust on the filter plate is cleaned into the ash collecting trough to prevent the accumulated dust from clogging the filter holes, thereby completing the gas dust removal.

[0010] The detection tank includes a connecting pipe, a detection tank body, an activated carbon adsorption plate, a piston plate, a sliding positioning shaft, a spring, a worm, a worm gear, a rotating shaft I, a rotating shaft positioning frame I, a transmission belt, a rotating shaft II, a rotating shaft positioning frame II, a bevel gear I, a bevel gear II, a connecting shaft, a movable cover plate, and a piston cylinder; the connecting pipe is connected to the inside of the detection tank body, two sets of activated carbon adsorption plates are arranged in the middle position inside the detection tank body, a piston cylinder is provided on the upper part of the detection tank body, a piston plate is provided in the piston cylinder, a sliding positioning shaft is connected in the middle of the piston plate, a spring is arranged on the sliding positioning shaft, and a piston plate is provided on the piston plate. A worm is also provided, the worm is meshed with a worm wheel, the worm wheel is arranged on the rotating shaft I, the rotating shaft I is arranged between the rotating shaft positioning frame I, the rotating shaft positioning frame I and the rotating shaft positioning frame II are arranged on the detection tank body, the rotating shaft II is arranged between the rotating shaft positioning frame II, a transmission belt is provided between the rotating shaft I and the rotating shaft II, and a helical gear I is also provided on the rotating shaft II, the helical gear I is meshed with the helical gear II at the bottom, the lower part of the helical gear II is connected to the connecting shaft, the lower part of the connecting shaft is provided with a movable cover plate, the movable cover plate is inside the detection tank body, and the opening provided on the movable cover plate is the same size as the opening on the detection tank body;

[0011] Gas enters the detection tank from the connecting pipe. Clean water is provided at the bottom of the detection tank. Most of the sulfur dioxide in the gas dissolves in the water, increasing the pH value of the water. Carbon monoxide is insoluble in water and is discharged from the water. The pH sensor and carbon monoxide concentration sensor installed in the detection tank determine the ratio of sulfur dioxide to carbon monoxide in the gas. The gas is adsorbed by the activated carbon adsorption plate and moves upward. When the air pressure in the detection tank rises, it helps the sulfur dioxide dissolve in the water, making the detection result more accurate. The air pressure continues to rise, causing the piston plate to contact the spring and the worm to rise. The worm drives worm gear 1 to rotate, which drives shaft I to rotate. Shaft I drives shaft II to rotate through the transmission belt. Shaft II drives helical gear 1 to rotate. Helical gear 1 meshes with helical gear II, which drives helical gear II to rotate. Helical gear II drives the connecting shaft to rotate, and the connecting shaft drives the movable cover to rotate. When the air pressure in the tank is too high, the movable cover rotates. The circular hole on the movable cover is aligned with the circular hole on the upper part of the detection tank body. The gas is discharged from the outlet pipe. The pressure in the tank decreases and the movable cover resets.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1) The hand-cranked turntable of the fixing mechanism rotates, driving the bidirectional screw to rotate, causing the positioning plates I on both sides of the bidirectional screw to move in the center. The arc-shaped fixing plate provided in the middle of the positioning plate I clamps and fixes the middle tail exhaust pipe, fixing the tail exhaust pipe to the vehicle, so that the exhaust gas of the motor vehicle can stably enter the detection device;

[0014] 2) The motor of the dust removal tank drives the air intake fan blades to rotate through the main shaft. The air intake fan blades draw the gas in the cooling pipe into the dust removal tank. The gas passes downward through the filter plate, and the filter plate filters the dust particles in the gas. The motor drives the cross-shaped connecting plate to rotate through the main shaft. The cross-shaped connecting plate drives the fan-shaped brush plate to clean the filter plate, scraping the dust on the filter plate into the dust collecting trough to prevent the dust from clogging the filter holes, thus completing the gas dust removal;

[0015] 3) The air pressure in the test tank continues to rise, causing the piston plate to touch the spring and the worm to rise. The worm drives the worm gear to rotate, and the worm gear drives the rotating shaft I to rotate. The rotating shaft I drives the rotating shaft II to rotate through the transmission belt. The rotating shaft II drives the helical gear I to rotate. The helical gear I engages with the helical gear II to drive the helical gear II to rotate. The helical gear II drives the connecting shaft to rotate. The connecting shaft drives the movable cover to rotate, ensuring that a certain air pressure is maintained in the test tank, reducing the detection error caused by air pressure, increasing the dissolution rate of sulfur dioxide, and making the detection results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attachment Figure 1 This is a schematic diagram of the structure of a motor vehicle exhaust gas collection and detection device of the utility model Figure 1 ;

[0017] Attachment Figure 2This is a schematic diagram of the structure of a motor vehicle exhaust gas collection and detection device of the utility model Figure 2 ;

[0018] Attachment Figure 3 It is attached Figure 1 Schematic diagram of the fixed mechanism structure;

[0019] Attachment Figure 4 It is attached Figure 1 Cross-sectional view of the structure of the middle dust removal tank;

[0020] Attachment Figure 5 It is attached Figure 1 Schematic diagram of the structure of the middle dust removal tank;

[0021] Attachment Figure 6 It is attached Figure 1 Structural cross-section of the medium detection tank;

[0022] Attachment Figure 7 It is attached Figure 1 Schematic diagram of the structure of the middle detection tank;

[0023] In the figure: 11, rear exhaust pipe; 12, fixing mechanism; 13, box; 14, dust sensor; 15, cooling pipe; 16, dust removal tank; 18, detection tank; 19, exhaust pipe; 20, one-way valve; 21, pH sensor; 22, carbon monoxide concentration sensor; 23, gas pipe; 101, hand-cranked turntable; 102, two-way screw; 103, positioning plate I; 104, arc-shaped fixing plate; 105, positioning shaft; 106, fixed shell; 201, dust removal tank body; 202, motor; 203, main shaft; 204, intake fan blade; 20 5. Ash collecting trough; 206. Cross-shaped connecting plate; 207. Filter plate; 208. Fan-shaped brush plate; 301. Connecting pipe; 302. Detection tank body; 303. Activated carbon adsorption plate; 304. Piston plate; 305. Sliding positioning shaft; 306. Spring; 307. Worm; 308. Worm gear; 309. Rotating shaft I; 310. Rotating shaft positioning frame I; 311. Transmission belt; 312. Rotating shaft II; 313. Rotating shaft positioning frame II; 314. Bevel gear I; 315. Bevel gear II; 316. Connecting shaft; 317. Movable cover plate; 318. Piston cylinder. DETAILED DESCRIPTION

[0024] To facilitate understanding by those skilled in the art, Figure 1-7 , the technical solution of the utility model is further described in detail.

[0025] A motor vehicle exhaust gas collection and detection device includes a rear exhaust pipe 11, a fixing mechanism 12, a box 13, a dust sensor 14, a cooling pipe 15, a dust removal tank 16, a detection tank 18, an air outlet pipe 19, a one-way air valve 20, a pH sensor 21, a carbon monoxide concentration sensor 22, and an air supply pipe 23; the fixing mechanism 12 is arranged at the front end of the device and is fixedly connected to the rear exhaust pipe 11, so that the motor vehicle exhaust gas can stably enter the detection device, the rear end of the fixing mechanism 12 is connected to the air supply pipe 23, the front end of the air supply pipe 23 is provided with a dust sensor 14, the rear end of the air supply pipe 23 is connected to the cooling pipe 15, the compartment of the box 13 where the cooling pipe is located has cooling water, the rear end of the cooling pipe 15 is provided with a dust removal tank 16, the dust removal tank 16 is connected to the detection tank 18 through a pipeline, the air outlet of the dust removal tank 16 is provided with a one-way air valve 20, the bottom of the detection tank is provided with clean water, the upper end of the detection tank 18 is provided with an air outlet pipe 19, and the pH sensor and the carbon monoxide concentration sensor 22 are arranged inside the detection tank 18.

[0026] The fixing mechanism 12 includes a hand-cranked turntable 101, a two-way screw 102, a positioning plate I 103, an arc-shaped fixed plate 104, a positioning shaft 105, and a fixed shell 106; the hand-cranked turntable 101 is arranged on the outside of the fixed shell 106 and is connected to the two-way screw 102, and two groups of positioning plates I 103 are symmetrically arranged on the two-way screw 102 and cooperate with the two-way screw 102 to be connected, an arc-shaped fixed plate 104 is provided in the middle of the positioning plate I 103, and a positioning shaft 105 is also provided at the lower part of the positioning plate I 103, and the positioning shaft 105 is provided in the fixed shell 106 and is slidably connected to the positioning plate I 103; the hand-cranked turntable 101 is rotated to drive the two-way screw 102 to rotate, so that the positioning plates I 103 on both sides of the two-way screw 102 move in the center, and the arc-shaped fixed plate 104 provided in the middle of the positioning plate I 103 clamps and fixes the middle vehicle tail exhaust pipe 11, and is fixedly connected to the vehicle tail exhaust pipe 11, so that the exhaust gas of the motor vehicle can stably enter the detection device.

[0027] The dust removal tank 16 includes a dust removal tank body 201, a motor 202, a main shaft 203, an air intake fan blade 204, an ash collecting trough 205, a cross-shaped connecting plate 206, a filter plate 207, and a fan-shaped brush plate 208; the motor 202 is arranged inside the dust removal tank body 201, the motor 202 is connected to the main shaft 203, a cross-shaped connecting plate 206 is provided in the middle of the main shaft 203, a fan-shaped brush plate 208 is provided below the cross-shaped connecting plate 206, an air intake fan blade 204 is also provided at the top of the main shaft 203, a filter plate 207 is provided in the dust removal tank body 201, and a filter plate 207 is provided in the dust removal tank body 201. An ash collecting trough 205 is provided at the bottom; the motor 202 drives the air intake fan blades 204 to rotate through the main shaft 203, and the air intake fan blades 204 draw the gas in the cooling pipe 15 into the dust removal tank 16, and the gas passes downward through the filter plate 207, and the filter plate 207 filters the dust particles in the gas. The motor 202 drives the cross-shaped connecting plate 206 to rotate through the main shaft 203 at the same time, and the cross-shaped connecting plate 206 drives the fan-shaped brush plate 208 to clean the filter plate 207. The accumulated dust on the filter plate 207 is cleaned into the ash collecting trough 205 to prevent the accumulated dust from clogging the filter holes, thereby completing the gas dust removal.

[0028] The detection tank 18 includes a connecting pipe 301, a detection tank body 302, an activated carbon adsorption plate 303, a piston plate 304, a sliding positioning shaft 305, a spring 306, a worm 307, a worm gear 308, a rotating shaft I 309, a rotating shaft positioning frame I 310, a transmission belt 311, a rotating shaft II 312, a rotating shaft positioning frame II 313, a bevel gear I 314, a bevel gear II 315, a connecting shaft 316, a movable cover plate 317, and a piston cylinder 318; the connecting pipe 301 is connected to the inside of the detection tank body 302, two sets of activated carbon adsorption plates 303 are arranged in the middle position of the detection tank body 302, a piston cylinder 318 is provided on the upper part of the detection tank body 302, a piston plate 304 is provided in the piston cylinder 318, the sliding positioning shaft 305 is connected to the middle of the piston plate 304, and a spring 306 is provided on the sliding positioning shaft 305. A worm 307 is further provided on the piston plate 304, and the worm 307 is connected to a worm gear 308. The worm gear 308 is provided on a rotating shaft I 309, and the rotating shaft I 309 is provided between the rotating shaft positioning frames I 310. The rotating shaft positioning frames I 310 and the rotating shaft positioning frames II 313 are provided on the detection tank body 302. The rotating shaft II 312 is provided between the rotating shaft positioning frames II 313. A transmission belt 311 is provided between the rotating shaft I 309 and the rotating shaft II 312. The rotating shaft II 312 is further provided with a bevel gear I 314, which meshes with the bevel gear II 315 at the bottom. The lower part of the bevel gear II 315 is connected to a connecting shaft 316. A movable cover plate 317 is provided at the lower part of the connecting shaft 316. The movable cover plate 317 is inside the detection tank body 302, and the opening provided on the movable cover plate 317 is the same size as the opening on the detection tank body 302.

[0029] The gas enters the detection tank 18 from the connecting pipe 301. There is clean water at the bottom of the detection tank 18. Most of the sulfur dioxide in the gas dissolves in the water, which increases the pH value of the water. Carbon monoxide is insoluble in water and is discharged from the water. The pH value sensor 21 and the carbon monoxide concentration sensor 22 set in the detection tank 18 determine the content ratio of sulfur dioxide to carbon monoxide in the gas. The gas is adsorbed by the activated carbon adsorption plate 303 and moves upward. When the air pressure in the detection tank 18 rises, it helps the sulfur dioxide dissolve in the water, making the detection result more accurate. The air pressure continues to rise, causing the piston plate 304 to touch the spring 306 and the worm 307 to rise, and the worm 307 with As the movable worm gear 308 rotates, the worm gear 308 drives the rotating shaft I 309 to rotate, and the rotating shaft I 309 drives the rotating shaft II 312 to rotate through the transmission belt 311, and the rotating shaft II 312 drives the bevel gear I 314 to rotate, and the bevel gear I 314 engages with the bevel gear II 315 to drive the bevel gear II 315 to rotate, and the bevel gear II 315 drives the connecting shaft 316 to rotate, and the connecting shaft 316 drives the movable cover plate 317 to rotate. When the air pressure in the tank is too high, the movable cover plate 317 rotates, and the circular hole on the movable cover plate 317 is in the same position as the circular hole on the upper part of the detection tank body 302. The gas is discharged from the air outlet pipe 19, and the pressure in the tank is reduced, and the movable cover plate 317 is reset.

[0030] A motor vehicle exhaust gas collection and detection device, the working process is as follows:

[0031] During operation, the hand-cranked turntable 101 is rotated to drive the bidirectional screw 102 to rotate, so that the positioning plates Ⅰ103 on both sides of the bidirectional screw 102 move in the center. The arc-shaped fixing plate 104 provided in the middle of the positioning plate Ⅰ103 clamps and fixes the middle vehicle tail exhaust pipe 11, and is fixedly connected to the vehicle tail exhaust pipe 11, so that the exhaust gas of the motor vehicle enters the detection device stably. The exhaust gas of the motor vehicle first passes through the dust sensor 14, and then passes through the cooling pipe 15 for cooling. The motor 202 drives the air intake fan blades 204 to rotate through the main shaft 203, and the air intake fan blades 204 draw the gas in the cooling pipe 15 into the dust collector Tank 16, the gas passes downward through the filter plate 207, the filter plate 207 filters the dust particles in the gas, the motor 202 drives the cross-shaped connecting plate 206 to rotate through the main shaft 203, and the cross-shaped connecting plate 206 drives the fan-shaped brush plate 208 to clean the filter plate 207. The dust on the filter plate 207 is cleaned into the dust collecting tank 205 to prevent the dust from clogging the filter holes, completing the gas dust removal. The dust-removed gas enters the detection tank 18 through the one-way air valve 20 and the connecting pipe 301. There is clean water at the bottom of the detection tank 18, and most of the sulfur dioxide in the gas dissolves in water. , so that the pH value of the water increases, carbon monoxide is insoluble in water and is discharged from the water, and the content of sulfur dioxide and carbon monoxide in the gas is judged by the pH value sensor 21 and the carbon monoxide concentration sensor 22 set in the detection tank 18. The gas is adsorbed by the activated carbon adsorption plate 303 and moves upward. When the air pressure in the detection tank 18 rises, it helps sulfur dioxide dissolve in water, making the detection result more accurate. The air pressure continues to rise, causing the piston plate 304 to touch the spring 306 and the worm 307 to rise, and the worm 307 drives the worm wheel 308 to rotate, and the worm wheel 308 drives the rotating shaft I 309 to rotate. The rotating shaft I 309 drives the rotating shaft II 312 to rotate through the transmission belt 311, the rotating shaft II 312 drives the bevel gear I 314 to rotate, the bevel gear I 314 engages the bevel gear II 315 to drive the bevel gear II 315 to rotate, the bevel gear II 315 drives the connecting shaft 316 to rotate, the connecting shaft 316 drives the movable cover 317 to rotate. When the air pressure in the tank is too high, the movable cover 317 rotates, the circular hole on the movable cover 317 is consistent with the position of the circular hole on the upper part of the detection tank body 302, the gas is discharged from the air outlet pipe 19, the pressure in the tank is reduced, and the movable cover 317 is reset.

[0032] In the description of the present invention, unless otherwise specified, "plurality" means two or more; the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "head", "tail", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0033] In summary, electronic or electrical components including but not limited to motors, dust sensors, pH sensors, carbon monoxide sensors, etc. are components in the prior art, obtained through private customization or purchase, and the electrical connections between the components are conventional circuit connections or electrical connections in the prior art and are not within the scope of protection of the present utility model; among them, the specific model of the dust sensor is PMS7003 dust sensor, the specific model of the pH sensor is DPS-600 digital pH sensor, and the specific model of the carbon monoxide sensor is PS-CO-1000 carbon monoxide detection sensor.

[0034] The above content is merely an example and explanation of the structure of the present utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the scope of protection of the present utility model.

Claims

1. A motor vehicle exhaust collection and detection device, comprising a rear exhaust pipe, a fixing mechanism, a housing, a dust sensor, a cooling pipe, a dust removal tank, a detection tank, an exhaust pipe, a one-way valve, a pH sensor, a carbon monoxide concentration sensor, and an air supply pipe; characterized in that The fixing mechanism is arranged at the front end of the device and is fixedly connected to the exhaust pipe at the rear of the vehicle, so that the exhaust gas of the motor vehicle can stably enter the detection device. The rear end of the fixing mechanism is connected to the air supply pipe. A dust sensor is provided at the front end of the air supply pipe. The rear end of the air supply pipe is connected to a cooling pipe. There is cooling water in the compartment of the cooling pipe. A dust removal tank is provided at the rear end of the cooling pipe. The dust removal tank is connected to the detection tank through a pipeline. A one-way air valve is provided at the air outlet of the dust removal tank. Clean water is provided at the bottom of the detection tank. An air outlet pipe is provided at the upper end of the detection tank. A pH sensor and a carbon monoxide concentration sensor are provided inside the detection tank. The fixing mechanism includes a hand-cranked turntable, a two-way screw, a positioning plate I, an arc-shaped fixed plate, a positioning shaft, and a fixed shell; the hand-cranked turntable is arranged on the outside of the fixed shell and is connected to the two-way screw, and two sets of positioning plates I are symmetrically arranged on the two-way screw and are connected to the two-way screw. An arc-shaped fixed plate is provided in the middle of the positioning plate I, and a positioning shaft is also provided at the lower part of the positioning plate I. The positioning shaft is provided in the fixed shell and is slidably connected to the positioning plate I; the two-way screw is driven to rotate by the hand-cranked turntable, so that the positioning plates I on both sides of the two-way screw move in a centering manner, and the arc-shaped fixed plate provided in the middle of the positioning plate I clamps and fixes the middle tail exhaust pipe.

2. A motor vehicle exhaust gas collection and detection device according to claim 1, characterized in that The dust removal tank includes a dust removal tank body, a motor, a main shaft, an air intake fan blade, an ash collecting trough, a cross-shaped connecting plate, a filter plate, and a fan-shaped brush plate; the motor is arranged inside the dust removal tank body, the motor is connected to the main shaft, a cross-shaped connecting plate is provided in the middle of the main shaft, a fan-shaped brush plate is provided below the cross-shaped connecting plate, and an air intake fan blade is also provided on the top of the main shaft, the filter plate is arranged in the dust removal tank body, and an ash collecting trough is provided below the filter plate; the motor drives the air intake fan blade to rotate through the main shaft, and the air intake fan blade draws the gas in the cooling pipe into the dust removal tank, and the gas passes downward through the filter plate, and the filter plate filters the dust particles in the gas, and the motor drives the cross-shaped connecting plate to rotate through the main shaft at the same time, and the cross-shaped connecting plate drives the fan-shaped brush plate to clean the filter plate, and the accumulated dust on the filter plate is cleaned into the ash collecting trough to complete the gas dust removal.

3. The vehicle exhaust gas collection and detection device according to claim 1, characterized in that The detection tank includes a connecting pipe, a detection tank body, an activated carbon adsorption plate, a piston plate, a sliding positioning shaft, a spring, a worm, a worm gear, a rotating shaft I, a rotating shaft positioning frame I, a transmission belt, a rotating shaft II, a rotating shaft positioning frame II, a bevel gear I, a bevel gear II, a connecting shaft, a movable cover plate, and a piston cylinder; the connecting pipe is connected to the inside of the detection tank body, two sets of activated carbon adsorption plates are arranged in the middle position inside the detection tank body, a piston cylinder is provided on the upper part of the detection tank body, a piston plate is provided in the piston cylinder, a sliding positioning shaft is connected in the middle of the piston plate, a spring is arranged on the sliding positioning shaft, and a piston plate is provided on the piston plate. A worm is also provided, which is engaged with a worm wheel. The worm wheel is arranged on a rotating shaft I, which is arranged between a rotating shaft positioning frame I, and a rotating shaft positioning frame I and a rotating shaft positioning frame II are arranged on the body of the detection tank. The rotating shaft II is arranged between the rotating shaft positioning frames II, and a transmission belt is provided between the rotating shaft I and the rotating shaft II. A helical gear I is also provided on the rotating shaft II, which is engaged with the helical gear II at the bottom. The lower part of the helical gear II is connected to a connecting shaft, and a movable cover is provided at the lower part of the connecting shaft. The movable cover is inside the body of the detection tank, and the opening provided on the movable cover is the same size as the opening on the body of the detection tank.

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