A sampling device for motor vehicle exhaust detection

Abstract

The utility model provides a kind of for motor vehicle exhaust detection's sampling device, it is related to motor vehicle exhaust detection technical field, including temporary storage sleeve frame, the left side of the temporary storage sleeve frame is provided with exhaust detection sampling assembly, the left side of the sampling sleeve frame is provided with exhaust detection filtering assembly;Sampling tank is embedded into the clamping groove between sampling sleeve frame and temporary storage sleeve frame, gas check valve automatic docking gas flow structure, ensure that exhaust one-way flows into sampling tank, excess gas is discharged from the gas check valve of another side, to constitute complete gas flow channel, when gas collection and detection end, sampling tank can be taken out, gas sample stored in sampling tank will be sealed and stored, to facilitate sampling retention, and after inserting stainless steel filter screen into carbon particle filter groove, exhaust gas stream overflowed from sampling tank will first pass through stainless steel filter screen, to intercept large carbon particles, avoid causing subsequent structure congestion.

Description

Technical Field

[0001] This utility model relates to the field of motor vehicle exhaust emission detection technology, and in particular to a sampling device for motor vehicle exhaust emission detection. Background Technology

[0002] Motor vehicle exhaust emission testing is a professional test of the exhaust gases emitted by motor vehicles while they are in operation. Its purpose is to control exhaust pollution. The test targets harmful components such as carbon monoxide, nitrogen oxides, and particulate matter, and determines whether the emissions are up to standard according to national environmental protection standards. Only vehicles that pass the test can be legally driven on the road, thereby reducing the impact of exhaust emissions on air quality and human health.

[0003] A search revealed that the document with publication number "CN218629142U" mentions "a sampler for detecting motor vehicle exhaust gases, comprising a sampler body, the sampler body being connected to a fixing assembly via a corrugated pipe, the fixing assembly including a sealing cover and a fixing ring, a fixing post and a positioning post on the periphery of the sealing cover, a threaded sleeve being rotatably engaged at one end of the fixing post, a connecting screw and a positioning rod on the periphery of the fixing ring, the connecting screw passing through the threaded sleeve and the fixing post and engaging with the threaded sleeve, the positioning rod passing through the positioning post, and two sets of fixing bolts threaded through the periphery of the fixing ring, the ends of the two sets of fixing bolts passing through the fixing ring being rotatably engaged with arc-shaped clamping plates." In use, rotating the two sets of fixing bolts moves the two sets of arc-shaped clamping plates, allowing the device to be fixed to motor vehicle exhaust pipes of different sizes, improving the device's practicality. Rotating the threaded sleeve ensures a tight fit between the sealing cover and the exhaust outlet of the motor vehicle exhaust pipe, preventing exhaust gas leakage during collection and improving the safety of the device.

[0004] However, in the process of vehicle exhaust gas testing, traditional exhaust gas sampling devices are usually relatively simple in structure, often using a single filter structure, which makes it difficult to effectively separate particulate matter and gaseous pollutants of different sizes. This makes the test results susceptible to interference. Furthermore, during the testing process, no original exhaust gas samples are collected, resulting in a lack of reliable samples and data when it is necessary to verify or perform secondary analysis of the original exhaust gas composition.

[0005] Therefore, we provide a sampling device for detecting motor vehicle exhaust emissions to solve the above problems. Utility Model Content

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sampling device for detecting motor vehicle exhaust emissions includes a temporary storage frame. An exhaust emission detection sampling assembly is disposed on the left side of the temporary storage frame. The exhaust emission detection sampling assembly includes a sampling frame installed on the left side of the temporary storage frame. A sampling canister is installed between the sampling frame and the temporary storage frame. A carbon particle filter groove is disposed in the middle of the sampling frame. A stainless steel filter screen is installed inside the carbon particle filter groove. An exhaust emission detection filter assembly is disposed on the left side of the sampling frame. The exhaust emission detection filter assembly includes a connecting flange welded to the left side of the sampling frame. An activated carbon filter canister is screwed to the left side of the connecting flange. An activated carbon filter core is installed inside the activated carbon filter canister. A gas guide pipe is installed on the left side of the activated carbon filter canister.

[0008] As a further description of the above technical solution:

[0009] A rubber sleeve is adhesively connected to the right side of the temporary storage frame, and a fixing bracket is connected to the outer groove of the rubber sleeve.

[0010] As a further description of the above technical solution:

[0011] The outer side of the sampling sleeve is welded with a side slot, and the outer side slot of the side slot is connected to a side clip. The temporary storage sleeve and the sampling sleeve form a limiting structure through the side slot and the side clip.

[0012] As a further description of the above technical solution:

[0013] The sampling canister is connected to the sampling frame and the temporary storage frame by a slot. Gas check valves are installed on both the left and right sides of the sampling canister, and there is a gas flow structure between the gas check valves and the sampling frame and the temporary storage frame.

[0014] As a further description of the above technical solution:

[0015] The stainless steel filter screen is connected to the carbon particle filter tank by a slot, and the stainless steel filter screen has a porous mesh structure.

[0016] As a further description of the above technical solution:

[0017] The inner side of the connecting flange is provided with an embedded groove, and a glass fiber filter membrane plate is connected to the inner groove of the embedded groove.

[0018] As a further description of the above technical solution:

[0019] The activated carbon filter core and the activated carbon filter canister are connected by a slot, and the activated carbon filter core and the glass fiber filter membrane plate form a dual filtration structure.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. This utility model utilizes an exhaust gas detection and sampling component. When needed, the sampling canister is embedded into the slot between the sampling sleeve and the temporary storage sleeve. The gas check valve automatically connects to the gas flow structure, ensuring that the exhaust gas flows into the sampling canister in one direction. Excess gas is discharged from the gas check valve on the other side, thus forming a complete gas flow channel. After gas collection and detection are completed, the sampling canister can be removed, and the gas sample remaining in the sampling canister will be sealed and preserved for easy sampling and storage. After inserting the stainless steel filter plate into the carbon particle filter tank, the exhaust gas flow overflowing from the sampling canister will first pass through the stainless steel filter plate, thereby intercepting large carbon particles and preventing subsequent structural blockage. Furthermore, during detection and sampling, the stainless steel filter plate can be extracted separately to detect and sample the amount and composition of carbon particle deposition.

[0022] 2. This utility model uses an exhaust gas detection and filtration component. After being captured by a stainless steel filter screen, the exhaust gas flow passes through a glass fiber filter membrane. At this point, the glass fiber filter membrane further filters out fine particulate matter in the exhaust gas, reducing the filtration burden on the subsequent activated carbon filter core. The activated carbon filter core is then inserted into the activated carbon filter canister. The exhaust gas, after being initially filtered by the glass fiber filter membrane, enters the activated carbon filter core, where impurities such as oil mist are filtered out. This provides a purer gas sample for subsequent vehicle exhaust gas testing, effectively avoiding interference from oil mist and fine particulate matter on the testing equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the overall frontal disassembled structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the overall side-by-side disassembled structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the combined structure of the activated carbon filter canister and the activated carbon filter core of this utility model.

[0028] The following are labeled in the diagram: 1. Temporary storage sleeve; 2. Rubber sleeve; 3. Fixing bracket; 4. Exhaust gas detection and sampling assembly; 401. Sampling sleeve; 402. Side slot; 403. Side clamp; 404. Sampling tank; 405. Gas check valve; 406. Carbon particle filter tank; 407. Stainless steel filter screen; 5. Exhaust gas detection and filtration assembly; 501. Connecting flange; 502. Embedded groove; 503. Glass fiber filter membrane plate; 504. Activated carbon filter tank; 505. Activated carbon filter core; 506. Gas guide pipe. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-5 As shown, this utility model provides a technical solution: a sampling device for detecting motor vehicle exhaust emissions, including a temporary storage frame 1, an exhaust emission detection sampling component 4 disposed on the left side of the temporary storage frame 1, the exhaust emission detection sampling component 4 including a sampling frame 401 installed on the left side of the temporary storage frame 1, a sampling canister 404 installed between the sampling frame 401 and the temporary storage frame 1, a carbon particle filter groove 406 disposed in the middle of the sampling frame 401, a stainless steel filter screen 407 installed on the inner side of the carbon particle filter groove 406, an exhaust emission detection filter component 5 disposed on the left side of the sampling frame 401, the exhaust emission detection filter component 5 including a connecting flange 501 welded to the left side of the sampling frame 401, an activated carbon filter canister 504 screwed to the left side of the connecting flange 501, an activated carbon filter core 505 installed on the inner side of the activated carbon filter canister 504, and a gas guide pipe 506 installed on the left side of the activated carbon filter canister 504.

[0031] Furthermore, a rubber sleeve 2 is adhesively connected to the right side of the temporary storage sleeve 1. A fixing bracket 3 is connected to the outer groove of the rubber sleeve 2. When needed, the rubber sleeve 2 is put onto the exhaust pipe of the motor vehicle that needs to be sampled, and then secured by the fixing bracket 3. In this way, the rubber sleeve 2 can adapt to exhaust pipes of different diameters and shapes during sampling, ensuring good connection and sealing. The fixing bracket 3 is then used to limit and fix the rubber sleeve 2 to prevent the rubber sleeve 2 from detaching from the exhaust pipe due to high exhaust pressure.

[0032] Furthermore, a side slot 402 is welded to the outside of the sampling sleeve 401, and a side clip 403 is connected to the outside of the side slot 402. The temporary storage sleeve 1 and the sampling sleeve 401 form a limiting structure through the side slot 402 and the side clip 403. When needed, the sampling sleeve 401 and the temporary storage sleeve 1 are connected together, and then the side slot 402 outside the sampling sleeve 401 and the temporary storage sleeve 1 are fixed together by the side clip 403, thereby realizing the quick installation and disassembly of the two, which facilitates the replacement of the sampling container 404.

[0033] Furthermore, the stainless steel filter plate 407 and the carbon particle filter tank 406 are connected by a slot. The stainless steel filter plate 407 has a porous mesh structure. When needed, the stainless steel filter plate 407 is inserted into the carbon particle filter tank 406. At this time, the exhaust gas flow overflowing from the sampling tank 404 will first pass through the stainless steel filter plate 407, thereby intercepting large carbon particles and avoiding subsequent structural blockage. In addition, during detection and sampling, the stainless steel filter plate 407 can be extracted separately to detect and sample the amount and composition of carbon particles deposited.

[0034] Furthermore, the sampling canister 404 is connected to the sampling frame 401 and the temporary storage frame 1 by a slot. Gas check valves 405 are installed on both the left and right sides of the sampling canister 404. There is a gas flow structure between the gas check valves 405 and the sampling frame 401 and the temporary storage frame 1. When needed, the sampling canister 404 is inserted into the slot between the sampling frame 401 and the temporary storage frame 1. The gas check valves 405 automatically connect to the gas flow structure to ensure that the exhaust gas flows into the sampling canister 404 in one direction. Excess gas is discharged from the gas check valve 405 on the other side, thus forming a complete gas flow channel. After the gas collection and detection are completed, the sampling canister 404 can be taken out. The gas sample stored in the sampling canister 404 will be sealed and preserved, which facilitates sampling and retention.

[0035] Furthermore, the activated carbon filter core 505 and the activated carbon filter canister 504 are connected by a slot. The activated carbon filter core 505 and the glass fiber filter membrane plate 503 form a dual filtration structure. When needed, the activated carbon filter core 505 is inserted into the activated carbon filter canister 504. At this time, the exhaust gas, which has been preliminarily filtered by the glass fiber filter membrane plate 503, enters the activated carbon filter core 505, where oil mist and other impurities are filtered out, thereby providing a purer gas sample for subsequent vehicle exhaust gas testing and effectively avoiding interference from oil mist and fine particulate matter on the testing equipment.

[0036] Furthermore, an embedded groove 502 is provided on the inner side of the connecting flange 501, and a glass fiber filter membrane plate 503 is connected to the inner groove of the embedded groove 502. When needed, after being captured by the stainless steel filter screen plate 407, the exhaust gas flow will pass through the glass fiber filter membrane plate 503. At this time, the glass fiber filter membrane plate 503 will further filter the fine particulate matter in the exhaust gas, reducing the filtration burden on the subsequent activated carbon filter core 505.

[0037] Working principle: When needed, a new sampling canister 404 is inserted between the temporary storage sleeve 1 and the sampling sleeve 401, and the temporary storage sleeve 1 and the sampling sleeve 401 are fixed by the side clip 403 and the side slot 402. Then, a new stainless steel filter plate 407 is inserted into the carbon particle filter tank 406. After preparation, the rubber sleeve 2 is put on the outside of the car exhaust pipe, and then it is tightened by the thread of the fixing clip 3. Then, the air guide pipe 506 is connected to the external exhaust gas detection equipment. At this time, as the vehicle starts, the exhaust gas enters the sampling canister through the gas check valve 405. 404. When the sampling canister 404 is full, the gas is discharged from the gas check valve 405 on the other side. Then, it is filtered by the stainless steel filter screen 407 to remove carbon particulate impurities. The gas is then injected into the connecting flange 501 and filtered by the glass fiber filter membrane 503 in the embedded groove 502. The gas is then injected into the activated carbon filter canister 504 and filtered by the activated carbon filter core 505 before being discharged from the gas guide pipe 506. After the test is completed, the sampling canister 404 and the stainless steel filter screen 407 are removed for sample retention. This completes the use of a sampling device for motor vehicle exhaust gas testing.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sampling device for detecting motor vehicle exhaust emissions, comprising a temporary storage frame (1), characterized in that: A tail gas detection sampling assembly (4) is provided on the left side of the temporary storage frame (1). The tail gas detection sampling assembly (4) includes a sampling frame (401) installed on the left side of the temporary storage frame (1). A sampling tank (404) is installed between the sampling frame (401) and the temporary storage frame (1). A carbon particle filter tank (406) is provided in the middle of the sampling frame (401). A stainless steel filter screen (407) is installed on the inner side of the carbon particle filter tank (406). A tail gas detection filter assembly (5) is provided on the left side of the sampling frame (401). The tail gas detection filter assembly (5) includes a connecting flange (501) welded to the left side of the sampling frame (401). An activated carbon filter tank (504) is screwed to the left side of the connecting flange (501). An activated carbon filter core (505) is installed on the inner side of the activated carbon filter tank (504). A gas guide pipe (506) is installed on the left side of the activated carbon filter tank (504).

2. The sampling device for detecting motor vehicle exhaust emissions according to claim 1, characterized in that, A rubber sleeve (2) is adhesively connected to the right side of the temporary storage frame (1), and a fixing bracket (3) is connected to the outer groove of the rubber sleeve (2).

3. The sampling device for detecting motor vehicle exhaust emissions according to claim 1, characterized in that, The sampling sleeve (401) has a side slot (402) welded on the outside. The side slot (402) is connected to a side clip (403). The temporary storage sleeve (1) and the sampling sleeve (401) form a limiting structure through the side slot (402) and the side clip (403).

4. A sampling device for detecting motor vehicle exhaust emissions according to claim 1, characterized in that, The sampling canister (404) is connected to the sampling frame (401) and the temporary storage frame (1) by a slot. Gas check valves (405) are installed on both the left and right sides of the sampling canister (404). There is a gas flow structure between the gas check valve (405) and the sampling frame (401) and the temporary storage frame (1).

5. A sampling device for detecting motor vehicle exhaust emissions according to claim 1, characterized in that, The stainless steel filter plate (407) and the carbon particle filter tank (406) are connected by a slot, and the stainless steel filter plate (407) has a porous mesh structure.

6. A sampling device for detecting motor vehicle exhaust emissions according to claim 1, characterized in that, The inner side of the connecting flange (501) is provided with an embedded groove (502), and the inner side of the embedded groove (502) is connected to a glass fiber filter membrane plate (503).

7. A sampling device for detecting motor vehicle exhaust emissions according to claim 1, characterized in that, The activated carbon filter core (505) and the activated carbon filter canister (504) are connected by a slot, and the activated carbon filter core (505) and the glass fiber filter membrane plate (503) form a dual filtration structure.

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