Automobile exhaust detection device

Abstract

The utility model discloses an automobile tail gas detection device, which belongs to the technical field of automobile detection, and adopts the technical scheme that the automobile tail gas detection device comprises a tail gas analyzer. The probe is connected with the tail gas analyzer, the gas collecting hood is arranged on the periphery of the probe, the exhaust fan is communicated with the gas collecting hood through a gas pipe, and the tail gas treatment structure is arranged on the gas pipe; a positioning ring for mounting the probe is arranged on the inner wall of the small end of the gas-collecting hood, a lead outlet of the probe is formed in the gas-collecting hood, and a sealing ring is arranged at the joint of the gas-collecting hood and the lead outlet; a lifting support is arranged on the lower portion of the gas collecting hood, and the automobile exhaust pipe is located between the probe and the gas collecting hood. The device has the beneficial effects that the probe collects tail gas for analysis, and the gas collecting hood collects peripheral waste gas and purifies the waste gas through the tail gas treatment structure, so that indoor pollution is reduced; the height-adjustable lifting support can adapt to the positions of tail pipes of different vehicle types.

Description

Technical Field

[0001] This utility model belongs to the field of automotive testing technology, and specifically relates to an automotive exhaust gas testing device. Background Technology

[0002] In indoor environments such as auto repair and testing stations, vehicle exhaust emission testing is a crucial step in assessing vehicle emissions compliance. Traditional exhaust emission testing typically involves inserting a handheld probe directly into the exhaust pipe for sampling. However, uncollected exhaust gases (such as CO, NOx, and particulate matter) accumulate indoors during the testing process, posing a health hazard to operators and being difficult to remove in a timely manner. Utility Model Content

[0003] The purpose of this invention is to provide an automotive exhaust gas detection device.

[0004] This utility model is achieved through the following measures: an automobile exhaust gas detection device, including an exhaust gas analyzer, characterized in that it further includes a probe connected to the exhaust gas analyzer, a gas collection hood disposed around the probe, a fan connected to the gas collection hood via a gas pipe, and an exhaust gas treatment structure disposed on the gas pipe.

[0005] The gas collecting hood has a positioning ring for mounting the probe on the inner wall of the small end. The gas collecting hood has a lead wire outlet for the probe and a sealing ring is provided at the connection between the lead wire outlet and the lead wire.

[0006] The lower part of the gas collection hood is equipped with a lifting bracket, and the vehicle exhaust pipe is located between the probe and the gas collection hood.

[0007] The exhaust gas treatment structure includes a hollow cylinder, with both ends of the cylinder connected to a gas pipe via connectors. Inside the cylinder, there is a honeycomb ceramic carrier coated with a catalyst and an activated carbon filter, with the honeycomb ceramic carrier located near the gas collection hood.

[0008] Furthermore, the cylinder and connector are assembled from two symmetrical structures and secured with several bolts, with sealing gaskets at the joints of the two symmetrical structures. The exhaust gas treatment structure features a detachable design for easy replacement of the filter or honeycomb ceramic carrier, and the sealing gaskets ensure airtightness at the joints.

[0009] Furthermore, the exhaust fan's outer casing is equipped with several support legs, and rollers are mounted on the support legs. The rollers facilitate the movement of the device between testing stations.

[0010] Furthermore, several screws are threaded through the side wall of the positioning ring and press against the outer wall of the probe. The positioning ring is fixed to the inner wall of the small end of the gas collecting hood by several diagonal rods. The positioning ring is fixed to the small end of the gas collecting hood so that the side wall of the gas collecting hood fits against the outer end of the vehicle tailpipe during use, minimizing the escape of gas.

[0011] Furthermore, the lifting bracket includes a hollow column, inside which an adjusting rod is sleeved. The upper end of the adjusting rod is fixedly connected to the outer wall of the air intake hood. A threaded screw is threaded through the upper part of the side wall of the hollow column, capable of pressing against the adjusting rod. Several support rods are screwed onto the lower part of the side wall of the hollow column. Loosening the screw can change the position of the adjusting rod, thereby adjusting the height of the air intake hood to adapt to the exhaust pipe position of different vehicle models.

[0012] Furthermore, the probe is concentrically positioned with the gas collection hood.

[0013] Furthermore, the gas collection hood is generally a cone-shaped hood. The cone-shaped hood guides the exhaust gas to converge towards the center.

[0014] How to use:

[0015] Move the exhaust fan to the testing station, place the probe inside the positioning ring, and then tighten the screws. Adjust the height of the lifting bracket so that the gas collection hood is aligned with the vehicle's tailpipe and the inner wall of the gas collection hood is flush with the end of the tailpipe, ensuring the probe insertion depth is appropriate. Check that the lead wire outlet sealing ring is tightened. Start the exhaust fan; the exhaust gas enters the gas pipe through the gas collection hood, is purified by the honeycomb ceramic carrier and activated carbon filter, and is then discharged. Simultaneously turn on the exhaust gas analyzer and collect exhaust gas data through the probe. The exhaust gas analyzer monitors the exhaust gas composition in real time and records the test results.

[0016] The beneficial effects of the technical solution provided by this utility model embodiment are: the probe collects exhaust gas for analysis, the gas collection hood collects the external exhaust gas and purifies it through the exhaust gas treatment structure, reducing indoor pollution; the height-adjustable lifting bracket can adapt to the tailpipe position of different vehicle models. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings listed below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 This is a structural diagram of the conical cover, probe, and lifting support;

[0020] Figure 3 Is with Figure 2 Schematic diagrams of structures at different angles;

[0021] Figure 4This is a schematic diagram of the internal structure of the exhaust gas treatment system.

[0022] The components represented by each number in the attached diagram are listed below: 1. Probe; 2. Gas collection hood; 3. Gas pipe; 4. Exhaust fan; 5. Exhaust gas treatment structure; 6. Lifting bracket; 7. Positioning ring; 101. Lead wire; 401. Support leg; 402. Roller; 501. Cylinder; 502. Connector; 503. Honeycomb ceramic carrier; 504. Activated carbon filter; 601. Hollow column; 602. Adjusting rod; 603. Support leg; 604. Screw; 701. Diagonal rod; 702. Screw. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. Of course, the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0024] See Figures 1-4 A vehicle exhaust gas detection device includes an exhaust gas analyzer, characterized in that it further includes a probe 1 connected to the exhaust gas analyzer, an exhaust gas collection hood 2 disposed around the probe 1, an exhaust fan 4 connected to the exhaust gas collection hood 2 via an air pipe 3, and an exhaust gas treatment structure 5 disposed on the air pipe 3.

[0025] A positioning ring 7 for mounting the probe 1 is provided on the inner wall of the small end of the gas collection hood 2. The gas collection hood 2 has an opening for the lead wire outlet of the probe 1, and a sealing ring is provided at the connection between the lead wire outlet and the lead wire 101, which is not shown in the attached figure.

[0026] A lifting bracket 6 is provided at the lower part of the gas collection hood 2, and the vehicle exhaust pipe 3 is located between the probe 1 and the gas collection hood 2.

[0027] The exhaust gas treatment structure 5 includes a hollow cylinder 501. Both ends of the cylinder 501 are connected to the gas pipe 3 through connectors 502. Inside the cylinder 501, a honeycomb ceramic carrier 503 coated with a catalyst and an activated carbon filter 504 are arranged. The honeycomb ceramic carrier 503 is close to the gas collection hood 2.

[0028] The cylinder 501 and connector 502 are composed of two symmetrical structures joined together and fixed by several bolts. A sealing gasket is provided at the joint of the two symmetrical structures. The exhaust gas treatment structure 5 adopts a detachable design to facilitate the replacement of the activated carbon filter 504 or the honeycomb ceramic carrier 503. The sealing gasket ensures the airtightness of the joint.

[0029] The outer casing of the exhaust fan 4 is provided with several support legs 401, and rollers 402 are installed on the support legs 401. The rollers 402 are designed to facilitate the movement of the device between testing stations.

[0030] The positioning ring 7 has several screws 702 threaded through it and pressing against the outer wall of the probe. The positioning ring 7 is fixed to the inner wall of the small end of the gas collection hood 2 by several diagonal rods 701.

[0031] The lifting bracket 6 includes a hollow column 601, inside which an adjusting rod 602 is sleeved. The upper end of the adjusting rod 602 is fixedly connected to the outer wall of the air intake hood 2. A screw 604, which can rest on the adjusting rod 602, is threaded through the upper part of the side wall of the hollow column 601. Several support rods 603 are screwed onto the lower part of the side wall of the hollow column 601. Loosening the screw 604 can change the position of the adjusting rod 602, thereby adjusting the height of the air intake hood 2 to adapt to the tailpipe position of different vehicle models.

[0032] The probe 1 and the gas collection hood 2 are set concentrically.

[0033] The exhaust hood 2 is generally a cone-shaped hood. The cone-shaped hood can guide the exhaust gas to converge towards the center.

[0034] The exhaust gas analyzer and probe utilize existing technology; their specific structure will not be detailed here. For further information, please refer to the VXV100-HC / CO2 / CO / NOX analyzer and its built-in probe. Additionally, when other probe types are used, a cylindrical probe structure is generally employed.

[0035] How to use:

[0036] Move the exhaust fan 4 to the testing station, place the probe 1 inside the positioning ring 7, and then tighten the screws. Adjust the height of the lifting bracket 6 so that the gas collection hood 2 is aligned with the vehicle's exhaust pipe, ensuring the probe 1 is inserted to the appropriate depth. Start the exhaust fan 4; the exhaust gas enters the gas pipe 3 through the gas collection hood 2, is purified by the honeycomb ceramic carrier and activated carbon filter 504, and is then discharged. Simultaneously turn on the exhaust gas analyzer, collecting exhaust gas data through the probe 1. The exhaust gas analyzer monitors the exhaust gas composition in real time and records the test results.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for detecting exhaust gas of an automobile, comprising an exhaust gas analyzer, characterized in that, It also includes a probe connected to the exhaust gas analyzer, a gas collection hood set around the probe, a fan connected to the gas collection hood via a gas pipe, and an exhaust gas treatment structure set on the gas pipe. The gas collecting hood has a positioning ring for mounting the probe on the inner wall of the small end. The gas collecting hood has a lead wire outlet for the probe and a sealing ring is provided at the connection between the lead wire outlet and the lead wire. The lower part of the gas collection hood is equipped with a lifting bracket, and the vehicle exhaust pipe is located between the probe and the gas collection hood. The exhaust gas treatment structure includes a hollow cylinder, with both ends of the cylinder connected to a gas pipe via connectors. Inside the cylinder, a honeycomb ceramic carrier coated with a catalyst and an activated carbon filter are arranged, with the honeycomb ceramic carrier located close to the gas collection hood.

2. The automobile exhaust detection device according to claim 1, wherein The cylinder and connector are assembled from two symmetrical structures and fixed by several bolts. A sealing gasket is provided at the joint of the two symmetrical structures.

3. The automobile exhaust detection device according to claim 1, wherein The exhaust fan has a number of support legs on its outer casing, and the support legs are equipped with rollers.

4. The automobile exhaust detection device according to claim 1, wherein The positioning ring has several screws threaded through its side wall and resting against the outer wall of the probe. The positioning ring is fixed to the inner wall of the small end of the gas collection hood by several diagonal rods.

5. The automobile exhaust detection device according to claim 1, wherein The lifting support includes a hollow column, an adjusting rod is sleeved inside the hollow column, the upper end of the adjusting rod is fixedly connected to the outer wall of the gas collection hood, and a screw rod that can push against the adjusting rod is threaded through the upper part of the side wall of the hollow column; several support rods are provided on the lower part of the side wall of the hollow column by screws.

6. The automobile exhaust detection device according to claim 1, wherein The probe is concentrically positioned with the gas collection hood.

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