Tail gas sampling device convenient for automobile tail gas detection

Abstract

The utility model provides a tail gas sampling device convenient for automobile tail gas detection, which relates to the technical field of collecting and sampling devices and comprises an exhaust mechanism, two quick connection mechanisms are arranged outside the exhaust mechanism, a sampling mechanism is arranged between the two quick connection mechanisms, and the exhaust mechanism comprises a main pipeline. And the position, close to the front end, of the outer surface of the main pipeline fixedly communicates with a first flow dividing pipe. According to the tail gas sampling device, when the automobile tail gas is guided to the detection device through the main pipeline to be detected, part of the tail gas passes through the first flow dividing pipe, the sampling tank and the second flow dividing pipe, when sampling is needed, the sampling tank filled with tail gas samples can be detached by closing all the first valves and the second valves, and the whole structure is simple; the device is simple in structure, convenient to operate, high in convenience and low in sampling difficulty, and tail gas can be detected while a tail gas sample is extracted.

Description

Technical Field

[0001] The utility model relates to the technical field of collecting sampling devices, in particular to an exhaust gas sampling device that is convenient for automobile exhaust gas detection. Background Art

[0002] Automobile exhaust is the waste gas generated when a car is in use. It contains hundreds of different compounds, among which pollutants include solid suspended particles, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, lead and sulfur oxides. In order to effectively control the degree of air pollution caused by automobile exhaust, it is necessary to test automobile exhaust.

[0003] In the prior art, such as Chinese patent announcement number CN206246189U, a monitoring device for detecting automobile exhaust emissions is disclosed, including an exhaust monitor, a first round tube, a second round tube, a right-angle block, a bolt, a long plate, a circular connecting piece, a cross bar, a nut, a thread, an exhaust filter plate, an information receiving module, an information processing module, an information transmission module, a wireless network, an on-board terminal, a sensing end, a circuit board, a container box, a smart chip, a built-in battery, a grid blocking piece and a round through hole. The beneficial effect of this technical solution is that the first round tube and the second round tube are connected to the long plate through the right-angle block and the bolt and the nut at the bottom, and such a connection method is relatively simple to disassemble, and can be replaced and installed when facing exhaust pipes of different sizes. The circular connecting piece is made of stainless steel material and has a high service life. It can also be made into different sizes and matched with the round through holes on the cross plate to meet the exhaust pipes of different sizes, and the circular connecting piece and the cross plate can be set to multiple groups.

[0004] Although the above technical scheme can detect exhaust emissions from automobile exhaust pipes of different sizes, in order to avoid inaccurate test results caused by failure of the detection device during the exhaust gas detection process, it is necessary to sample and re-test the exhaust gas from the same batch of automobiles during the detection process. The existing exhaust gas detection device cannot sample while detecting and needs to be performed separately, which increases the difficulty of sampling and is less convenient. Therefore, we propose a new exhaust gas sampling device that is convenient for automobile exhaust gas detection. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that in order to avoid inaccurate detection results due to malfunction of the detection device during the exhaust gas detection process, it is necessary to sample and re-test the exhaust gases of the same batch of automobiles during the detection process, while the existing exhaust gas detection devices are not able to sample while detecting and need to be performed separately, which increases the difficulty of sampling and reduces the convenience. An exhaust gas sampling device that is convenient for use in automobile exhaust gas detection is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an exhaust gas sampling device convenient for automobile exhaust gas detection, comprising: an exhaust mechanism, two quick-connect mechanisms are arranged on the outside of the exhaust mechanism, a sampling mechanism is arranged between the two quick-connect mechanisms, the exhaust mechanism comprises a main pipeline, a first shunt pipe is fixedly connected to the outer surface of the main pipeline near the front end, a second shunt pipe is fixedly connected to the outer surface of the main pipeline near the rear end, the sampling mechanism comprises a sampling tank, a front end of the sampling tank is fixedly connected to the exhaust pipe, and a rear end of the sampling tank is fixedly connected to the intake pipe.

[0007] Preferably, first sealing rings are bonded to opposite side end surfaces of the first shunt pipe and the second shunt pipe, and first valves are installed on tops of the first shunt pipe and the second shunt pipe.

[0008] Preferably, the end faces of the air intake pipe and the exhaust pipe facing away from each other are both bonded with a second sealing ring, and the tops of the air intake pipe and the exhaust pipe are both installed with a second valve.

[0009] Preferably, the exhaust pipe and the first diverter pipe are located in corresponding positions, the intake pipe and the second diverter pipe are located in corresponding positions, and the two second sealing rings are respectively fitted with the two first sealing rings.

[0010] Preferably, the two quick-connect mechanisms each include a connecting ring, and the two connecting rings are fixedly connected to the outer surfaces of the first shunt pipe and the second shunt pipe, respectively.

[0011] Preferably, mounting sleeves are fixedly connected to the outer surfaces of opposite sides of the two connecting rings near the edges, and inner flanges are fixedly connected between the inner surface walls of the two mounting sleeves.

[0012] Preferably, an outer flange is slidably provided between the inner surface walls of the installation sleeve, the outer flange and the outer surface of the inner flange are in contact with each other, and the outer surfaces of the opposite sides of the two outer flanges are fixedly connected with connecting sleeves near the inner edges.

[0013] Preferably, the inner walls of the two connecting sleeves are respectively fitted with the outer surfaces of the intake pipe and the exhaust pipe, and a spring is connected between the connecting ring and the outer flange, and the spring is arranged inside the mounting sleeve.

[0014] Compared with the prior art, the advantages and positive effects of the utility model are:

[0015] 1. In the utility model, when the automobile exhaust gas is guided to the detection device for detection through the main pipeline, a part of the exhaust gas will pass through the first branch pipe, the sampling tank and the second branch pipe. When sampling is required, the sampling tank filled with the exhaust gas sample can be removed by closing all the first valves and the second valves. The overall structure is simple and easy to operate. The exhaust gas sample can be taken out while the exhaust gas is being detected. The convenience is high and the sampling difficulty is low.

[0016] 2. In the utility model, when the sampling tank is removed, the connecting sleeves on the surfaces of the intake pipe and the exhaust pipe are pressed into the inside of the installation sleeves on both sides. At this time, the outer flange at the rear of the connecting sleeve will squeeze the spring to shrink and detach from the surfaces of the intake pipe and the exhaust pipe. Then, the sampling tank is directly removed and replaced with another sampling tank. When installing another sampling tank, the intake pipe and the exhaust pipe are aligned with the first branch pipe and the second branch pipe respectively, and then the connecting sleeve is loosened. At this time, the spring rebounds and pushes the connecting sleeve to slide to the surfaces of the intake pipe and the exhaust pipe to complete the fixation of the sampling tank. This design makes the disassembly and assembly of the sampling tank convenient, simple to operate, and highly practical. The outer flange and the inner flange cooperate with each other to limit the maximum sliding distance of the connecting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A stereoscopic diagram of an exhaust gas sampling device convenient for automobile exhaust gas detection is provided for the utility model;

[0018] Figure 2 The utility model provides a structural cross-sectional view of an exhaust gas sampling device that is convenient for automobile exhaust gas detection;

[0019] Figure 3 The utility model provides a partial structural schematic diagram of an exhaust gas sampling device that is convenient for automobile exhaust gas detection;

[0020] Figure 4 The utility model provides a schematic diagram of the structure of a sampling mechanism of an exhaust gas sampling device that is convenient for automobile exhaust gas detection;

[0021] Figure 5 The utility model provides a schematic diagram of the structure of a quick-connect mechanism of an exhaust gas sampling device which is convenient for automobile exhaust gas detection.

[0022] Legend: 1. Exhaust mechanism; 101. Main pipeline; 102. First branch pipe; 103. Second branch pipe; 104. First valve; 105. First sealing ring; 2. Sampling mechanism; 201. Sampling tank; 202. Inlet pipe; 203. Exhaust pipe; 204. Second sealing ring; 205. Second valve; 3. Quick-connect mechanism; 301. Connecting ring; 302. Mounting sleeve; 303. Inner flange; 304. Outer flange; 305. Connecting sleeve; 306. Spring. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0025] Embodiment 1, as Figure 1-Figure 5 As shown, the utility model provides an exhaust gas sampling device that is convenient for automobile exhaust gas detection, including: an exhaust mechanism 1, two quick-connect mechanisms 3 are arranged outside the exhaust mechanism 1, a sampling mechanism 2 is arranged between the two quick-connect mechanisms 3, the exhaust mechanism 1 includes a main pipeline 101, a first shunt pipe 102 is fixedly connected to the outer surface of the main pipeline 101 near the front end, a second shunt pipe 103 is fixedly connected to the outer surface of the main pipeline 101 near the rear end, the sampling mechanism 2 includes a sampling tank 201, an exhaust pipe 203 is fixedly connected to the front end of the sampling tank 201, and an intake pipe is fixedly connected to the rear end of the sampling tank 201. 202, the first side end surfaces of the first diverter pipe 102 and the second diverter pipe 103 are bonded with the first sealing ring 105, the tops of the first diverter pipe 102 and the second diverter pipe 103 are installed with the first valve 104, the opposite side end surfaces of the intake pipe 202 and the exhaust pipe 203 are bonded with the second sealing ring 204, the tops of the intake pipe 202 and the exhaust pipe 203 are installed with the second valve 205, the exhaust pipe 203 and the first diverter pipe 102 are positioned correspondingly, the intake pipe 202 and the second diverter pipe 103 are positioned correspondingly, and the two second sealing rings 204 are respectively fitted with the two first sealing rings 105.

[0026] The effect achieved by the entire embodiment 1 is that when the device is in use, it receives automobile exhaust gas through the front end of the main pipeline 101, and uses the exhaust gas detection device to detect the exhaust gas discharged from the rear end of the main pipeline 101. When the exhaust gas circulates inside the main pipeline 101, a part of it will enter the first branch pipe 102, and then enter the sampling tank 201 through the intake pipe 202, and then be discharged from the rear end of the main pipeline 101 through the exhaust pipe 203 and the second branch pipe 103. When it is necessary to sample the exhaust gas being detected, first close the second branch pipe 103 and the first valve 104 and the second valve 205 on the exhaust pipe 203. At this time, the exhaust gas will enter the sampling tank 201 and be retained, and then close the second branch pipe 103. After the first valve 104 and the second valve 205 on a branch pipe 102 and the intake pipe 202 are closed, the exhaust gas sample can be sealed in the sampling tank 201, and the first branch pipe 102 and the second branch pipe 103 will not affect the vehicle exhaust gas detection when they are in a closed state. The overall structure is simple and the operation is convenient. The exhaust gas sample can be taken out while the exhaust gas is being detected. The convenience is high and the sampling difficulty is low. Through this operation, different sampling tanks 201 can be replaced to sample exhaust gas from different batches of automobiles. The first sealing ring 105 and the second sealing ring 204 are set to improve the sealing effect between the intake pipe 202 and the exhaust pipe 203 and the first branch pipe 102 and the second branch pipe 103.

[0027] Embodiment 2, as Figure 1-Figure 5 As shown, the difference between this embodiment and embodiment 1 is that the two quick-connect mechanisms 3 both include a connecting ring 301, and the two connecting rings 301 are respectively fixedly connected to the outer surfaces of the first shunt pipe 102 and the second shunt pipe 103, and the outer surfaces of the opposite sides of the two connecting rings 301 are fixedly connected with mounting sleeves 302 near the edges, and the inner walls of the two mounting sleeves 302 are fixedly connected with inner flanges 303, and outer flanges 304 are slidably arranged between the inner walls of the mounting sleeves 302, and the outer surfaces of the outer flanges 304 and the inner flanges 303 are fitted together, and connecting sleeves 305 are fixedly connected to the outer surfaces of the opposite sides of the two outer flanges 304 near the inner edges, and the inner walls of the two connecting sleeves 305 are respectively fitted with the outer surfaces of the intake pipe 202 and the exhaust pipe 203, and a spring 306 is connected between the connecting ring 301 and the outer flange 304, and the spring 306 is arranged inside the mounting sleeve 302.

[0028] The effect achieved by the entire embodiment 2 is that when the sampling tank 201 is removed, the connecting sleeve 305 on the surface of the intake pipe 202 and the exhaust pipe 203 is pressed into the inside of the installation sleeves 302 on both sides, and the outer flange 304 at the rear of the connecting sleeve 305 squeezes the spring 306 to shrink and detach from the surface of the intake pipe 202 and the exhaust pipe 203. Then, the sampling tank 201 is directly removed and replaced with another sampling tank 201. When installing another sampling tank 201, the intake pipe 202 is replaced with another sampling tank 201. 02 and the exhaust pipe 203 are aligned with the first shunt pipe 102 and the second shunt pipe 103 respectively, and then the connecting sleeve 305 is loosened. At this time, the spring 306 rebounds and pushes the connecting sleeve 305 to slide to the surface of the intake pipe 202 and the exhaust pipe 203 to complete the fixation of the sampling tank 201. This design makes the sampling tank 201 convenient to disassemble and assemble, simple to operate, and highly practical. The outer flange 304 and the inner flange 303 cooperate with each other to limit the maximum sliding distance of the connecting sleeve 305.

[0029] Working principle: When in use, the device receives automobile exhaust gas through the front end of the main pipeline 101, and uses the exhaust gas detection device to detect the exhaust gas discharged from the rear end of the main pipeline 101. When the exhaust gas circulates inside the main pipeline 101, a part of it will enter the first branch pipe 102, and then enter the sampling tank 201 through the intake pipe 202, and then be discharged from the rear end of the main pipeline 101 through the exhaust pipe 203 and the second branch pipe 103. When it is necessary to sample the exhaust gas being detected, first close the second branch pipe 103 and The first valve 104 and the second valve 205 on the exhaust pipe 203, at this time, the exhaust gas will enter the sampling tank 201 and be retained, and then the first valve 104 and the second valve 205 on the first shunt pipe 102 and the intake pipe 202 can be closed to seal the exhaust gas sample in the sampling tank 201, and the first shunt pipe 102 and the second shunt pipe 103 in a closed state will not affect the vehicle exhaust gas detection, the overall structure is simple, the operation is convenient, the exhaust gas sample can be taken out while the exhaust gas is being detected, the convenience is high, and the sampling The difficulty is relatively small. Through this operation, different sampling tanks 201 can be replaced to sample exhaust gas from different batches of cars. In addition, when removing the sampling tank 201, the connecting sleeves 305 on the surfaces of the intake pipe 202 and the exhaust pipe 203 are pressed into the inside of the mounting sleeves 302 on both sides. At this time, the outer flange 304 at the rear of the connecting sleeve 305 will squeeze the spring 306 to shrink and detach from the surfaces of the intake pipe 202 and the exhaust pipe 203. Then, the sampling tank 201 can be directly removed and replaced with another sampling tank 201, and another one can be installed. When taking a sampling tank 201, align its intake pipe 202 and exhaust pipe 203 with the first branch pipe 102 and the second branch pipe 103 respectively, and then release the connecting sleeve 305. At this time, the spring 306 rebounds and pushes the connecting sleeve 305 to slide to the surface of the intake pipe 202 and the exhaust pipe 203 to complete the fixation of the sampling tank 201. This design makes the sampling tank 201 easy to assemble and disassemble, simple to operate, and highly practical. The outer flange 304 and the inner flange 303 cooperate with each other to limit the maximum sliding distance of the connecting sleeve 305.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An exhaust gas sampling device for automobile exhaust gas detection, characterized in that: include: An exhaust mechanism (1), wherein two quick-connect mechanisms (3) are arranged outside the exhaust mechanism (1), and a sampling mechanism (2) is arranged between the two quick-connect mechanisms (3); The exhaust mechanism (1) comprises a main pipe (101), a first shunt pipe (102) is fixedly connected to a position of the outer surface of the main pipe (101) near the front end, and a second shunt pipe (103) is fixedly connected to a position of the outer surface of the main pipe (101) near the rear end; The sampling mechanism (2) comprises a sampling tank (201), the front end of the sampling tank (201) being fixedly connected to an exhaust pipe (203), and the rear end of the sampling tank (201) being fixedly connected to an intake pipe (202).

2. The exhaust gas sampling device for automobile exhaust gas detection according to claim 1 is characterized in that: First sealing rings (105) are bonded to opposite side end surfaces of the first shunt pipe (102) and the second shunt pipe (103), and first valves (104) are installed on the tops of the first shunt pipe (102) and the second shunt pipe (103).

3. The exhaust gas sampling device for automobile exhaust gas detection according to claim 2 is characterized in that: The end surfaces of the air intake pipe (202) and the exhaust pipe (203) facing each other are both bonded with a second sealing ring (204), and the tops of the air intake pipe (202) and the exhaust pipe (203) are both installed with a second valve (205).

4. The exhaust gas sampling device for automobile exhaust gas detection according to claim 3 is characterized in that: The exhaust pipe (203) and the first shunt pipe (102) are located in corresponding positions, the intake pipe (202) and the second shunt pipe (103) are located in corresponding positions, and the two second sealing rings (204) are respectively fitted with the two first sealing rings (105).

5. The exhaust gas sampling device for automobile exhaust gas detection according to claim 4 is characterized in that: The two quick-connect mechanisms (3) each comprise a connecting ring (301), and the two connecting rings (301) are respectively fixedly connected to the outer surfaces of the first shunt pipe (102) and the second shunt pipe (103).

6. The exhaust gas sampling device for automobile exhaust gas detection according to claim 5 is characterized in that: The outer surfaces of the two connecting rings (301) on opposite sides are both fixedly connected with mounting sleeves (302) near the edges, and the inner surface walls of the two mounting sleeves (302) are both fixedly connected with inner flanges (303).

7. The exhaust gas sampling device for automobile exhaust gas detection according to claim 6 is characterized in that: An outer flange (304) is slidably arranged between the inner surface walls of the installation sleeve (302), the outer surfaces of the outer flange (304) and the inner flange (303) are in contact with each other, and connecting sleeves (305) are fixedly connected to the outer surfaces of the opposite sides of the two outer flanges (304) near the inner edges.

8. The exhaust gas sampling device for automobile exhaust gas detection according to claim 7 is characterized in that: The inner walls of the two connecting sleeves (305) are respectively fitted with the outer surfaces of the intake pipe (202) and the exhaust pipe (203); a spring (306) is connected between the connecting ring (301) and the outer flange (304); and the spring (306) is arranged inside the mounting sleeve (302).

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