A motor vehicle emissions detection device

Abstract

The utility model discloses a motor vehicle emission detection device relates to motor vehicle detection field, aims at solving the problem that traditional device is difficult to realize tail gas flow refinement adjustment. The device includes horizontal exhaust duct, longitudinal exhaust duct, joint and regulating valve, and horizontal and longitudinal exhaust duct vertical connection and through joint intercommunication, and longitudinal exhaust duct bottom end connects the emission detector. Regulating valve contains mounting bracket, adjusting chamber, handle, deflector, deflection chamber, limit frame, dial and positioning column, and the positioning column bottom end connects disc -shaped regulating valve board, and its diameter is matched with longitudinal exhaust duct. The handle can drive deflector, positioning column and regulating valve board synchronous rotation, and the dial is combined to realize flow accurate regulation, and the arc deflection chamber is cooperated with the limit frame and is guaranteed to adjust stability. The device improves the detection data accuracy and operation reliability, and the structure is reasonable and practical durable.

Description

Technical Field

[0001] This utility model relates to the field of motor vehicle testing, and in particular to a motor vehicle emission testing device. Background Technology

[0002] With the continuous growth of motor vehicle ownership, motor vehicle exhaust emissions have become one of the important factors affecting air quality, and accurate detection of motor vehicle emissions is a key link in implementing environmental protection control.

[0003] Currently, motor vehicle emission testing devices on the market typically introduce vehicle exhaust gas into the emission detector through the exhaust pipe in order to detect the concentration of pollutants such as carbon monoxide, hydrocarbons, and nitrogen oxides.

[0004] In existing technologies, the connection structure between the exhaust pipe and the detector is mostly fixed or uses simple valves for on / off control, making it difficult to achieve precise adjustment of the exhaust gas flow rate. Specifically, the adjustment components of traditional devices lack precise quantitative markings and stable limit structures. Operators can only rely on experience during adjustment, which can easily lead to excessively high or low exhaust gas flow rates entering the detector. When the flow rate is too high, it may exceed the detector's detection range, causing data distortion; when the flow rate is too low, it will prolong the detection time, reduce detection efficiency, and may even affect the representativeness of the detection results due to insufficient sampling.

[0005] Based on this, we propose a motor vehicle emission testing device. Utility Model Content

[0006] To address the technical problem that the connection structure between the exhaust pipe and the detector is mostly fixed or uses simple valves for on / off control, making it difficult to achieve precise adjustment of the exhaust gas flow, this utility model provides a motor vehicle emission detection device.

[0007] This utility model is achieved by the following technical solution: a motor vehicle emission detection device, including a transverse exhaust pipe and a longitudinal exhaust pipe, both of which are equipped with regulating valves; the transverse exhaust pipe is inserted into the inside of a connector. The regulating valve includes: Mounting bracket, which is fixedly connected to the surface of the horizontal exhaust pipe and the vertical exhaust pipe; An adjustment cavity is provided on the surface of the mounting bracket; Handles are provided on the surface of the mounting bracket. A deflector plate is mounted on top of the handle; The deflection cavity is formed in an arc shape on the surface of the deflection disk; The limiting bracket is snapped and positioned inside the deflection cavity, and the bottom end of the limiting bracket is mounted on the surface of the mounting bracket. A scale is provided on the surface of the deflection disk; The positioning column penetrates the surface of the deflection plate, and the bottom end of the positioning column is connected to an adjusting valve plate, which is installed inside the longitudinal exhaust pipe.

[0008] As a further optimization of this utility model, the horizontal exhaust pipe and the vertical exhaust pipe are connected vertically, and the connection between the horizontal exhaust pipe and the vertical exhaust pipe is connected by a joint.

[0009] As a further optimization of this utility model, the regulating valve plate is disc-shaped, and the positioning post is connected through the center of the regulating valve plate. The diameter of the regulating valve plate matches the diameter of the longitudinal exhaust pipe.

[0010] As a further optimization of this utility model, the positioning post passes through the dial and is connected to the dial. The rotation of the positioning post drives the deflection disk to deflect synchronously.

[0011] As a further optimization of this utility model, the bottom end of the longitudinal exhaust pipe is connected to the emission detector.

[0012] As a further optimization of this utility model, when the exhaust gas of a motor vehicle needs to be tested for emissions, the exhaust gas first enters the transverse exhaust pipe and flows through the connector into the longitudinal exhaust pipe that is vertically connected thereto, and finally delivers the exhaust gas to the emission detector connected to the bottom of the longitudinal exhaust pipe.

[0013] As a further optimization of this utility model, during the exhaust gas transmission process, the exhaust gas flow rate can be adjusted by regulating valves installed on the horizontal and vertical exhaust pipes. During adjustment, the operator turns the handle, which drives the deflector at the top to rotate. Since the positioning pin passes through and is connected to the deflector, the rotation of the deflector synchronously drives the positioning pin to rotate. Simultaneously, the positioning pin passes through and is connected to the scale, so the scale rotates along with the positioning pin, allowing the operator to visually understand the adjustment range through the scale markings on the scale.

[0014] As a further optimization of this utility model, the bottom end of the positioning column is connected to an adjusting valve plate installed inside the longitudinal exhaust pipe. The rotation of the positioning column will drive the adjusting valve plate to rotate synchronously. Since the adjusting valve plate is disc-shaped and its diameter matches the diameter of the longitudinal exhaust pipe, its rotation can change the size of the flow cross section formed between it and the inner wall of the pipe, thereby achieving fine adjustment of the exhaust gas flow.

[0015] As a further optimization of this utility model, during the rotation of the deflector, the arc-shaped deflection cavity on the surface of the deflector moves along the limiting frame that is engaged inside it. The bottom end of the limiting frame is mounted on the surface of the mounting bracket, which can limit and guide the rotation of the deflector, ensuring the stability of the adjustment process. The mounting bracket is fixedly connected to the surface of the horizontal exhaust pipe and the vertical exhaust pipe, providing mounting support for the various components of the regulating valve. The adjusting cavity is opened on the surface of the mounting bracket, providing space for the movement of the relevant components.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a graduated regulating valve on the horizontal and vertical exhaust pipes. Operators can intuitively control the adjustment range with the help of the scale. Combined with the matching design of the disc-shaped regulating valve plate and the pipe diameter, it can achieve fine adjustment of the exhaust gas flow, avoid the efficiency affected by the flow rate being too large and exceeding the detection range, and greatly improve the accuracy and stability of the detection data.

[0017] 2. This utility model connects the transverse and longitudinal exhaust pipes in the device vertically through a joint. Combined with the snap-fit ​​structure between the arc-shaped deflection chamber inside the regulating valve and the limiting frame, it not only ensures the sealing of the pipe connection and prevents exhaust gas leakage from polluting the environment or harming the health of operators, but also provides stable guidance for the regulating components and enhances the reliability of the operation process.

[0018] 3. This utility model, through the linkage design of the valve handle, deflector, and positioning column, makes flow regulation simple and efficient, eliminating the need for operator experience and judgment. Simultaneously, the mounting bracket provides stable support for each component, the adjustment chamber ensures sufficient space for component movement, and the overall structural layout is reasonable, enhancing the practicality and durability of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Schematic diagram of the cross-section of the middle section.

[0020] Explanation of key symbols: 1. Horizontal exhaust pipe; 2. Longitudinal exhaust pipe; 3. Connector; 4. Regulating valve; 41. Mounting bracket; 42. Adjusting chamber; 43. Handle; 44. Deflection plate; 45. Deflection chamber; 46. Limiting bracket; 47. Dial; 48. Positioning post. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] Example 1: Please combine Figures 1-2 This embodiment proposes a motor vehicle emission detection device, characterized by comprising a transverse exhaust pipe 1 and a longitudinal exhaust pipe 2, both of which are equipped with regulating valves 4; the transverse exhaust pipe 1 is inserted into the interior of a connector 3; the transverse exhaust pipe 1 and the longitudinal exhaust pipe 2 are connected vertically, and the connection between the transverse exhaust pipe 1 and the longitudinal exhaust pipe 2 is communicated through the connector 3. The bottom end of the longitudinal exhaust pipe 2 is connected to an emission detector.

[0023] In the specific technical solution, when the exhaust gas of a motor vehicle needs to be tested for emissions, the exhaust gas first enters the transverse exhaust pipe 1, and then flows into the longitudinal exhaust pipe 2 connected to it vertically through the connector 3, and finally delivers the exhaust gas to the emission detector connected to the bottom of the longitudinal exhaust pipe 2.

[0024] Control valve 4 includes: Mounting bracket 41 is fixedly connected to the surface of the transverse exhaust pipe 1 and the longitudinal exhaust pipe 2; Adjustment cavity 42 is formed on the surface of mounting bracket 41; Handle 43, handle 43 is set on the surface of mounting bracket 41; Deflection disk 44 is mounted on the top of handle 43; Deflection cavity 45 is arc-shaped and formed on the surface of deflection disk 44; The limiting bracket 46 is snapped and positioned inside the deflection cavity 45, and the bottom end of the limiting bracket 46 is mounted on the surface of the mounting bracket 41. A scale 47 is provided on the scale 47 and is disposed on the surface of the deflection disk 44; The positioning post 48 penetrates the surface of the deflection plate 44, and the bottom end of the positioning post 48 is connected to an adjusting valve plate, which is installed inside the longitudinal exhaust pipe 2.

[0025] A further technical solution involves adjusting the exhaust gas flow rate during the exhaust gas transmission process using regulating valves 4 installed on the transverse exhaust pipe 1 and the longitudinal exhaust pipe 2. During adjustment, the operator rotates handle 43, which in turn rotates the deflector plate 44 at the top. Since the positioning pin 48 passes through and is connected to the deflector plate 44, the rotation of the deflector plate 44 synchronously drives the positioning pin 48 to rotate. Simultaneously, the positioning pin 48 passes through and is connected to the scale 47; therefore, when the positioning pin 48 rotates, the scale 47 also rotates accordingly. The operator can visually understand the adjustment range through the scale on the scale 47.

[0026] The bottom end of the positioning column 48 is connected to a regulating valve plate installed inside the longitudinal exhaust pipe 2. Rotation of the positioning column 48 will cause the regulating valve plate to rotate synchronously. Since the regulating valve plate is disc-shaped and its diameter matches the diameter of the longitudinal exhaust pipe 2, its rotation can change the size of the flow cross section formed between it and the inner wall of the pipe, thereby achieving fine adjustment of the exhaust gas flow.

[0027] During the rotation of the deflection disk 44, the arc-shaped deflection cavity 45 formed on the surface of the deflection disk 44 moves along the limiting frame 46 that is engaged inside it. The bottom end of the limiting frame 46 is mounted on the surface of the mounting frame 41, which can limit and guide the rotation of the deflection disk 44, ensuring the stability of the adjustment process. The mounting frame 41 is fixedly connected to the surface of the transverse exhaust pipe 1 and the longitudinal exhaust pipe 2, providing mounting support for the various components of the regulating valve 4. The regulating cavity 42 is formed on the surface of the mounting frame 41, providing space for the movement of related components.

[0028] It should be noted that the regulating valve plate is disc-shaped, and the positioning pin 48 is connected through the center of the regulating valve plate. The diameter of the regulating valve plate matches the diameter of the longitudinal exhaust pipe 2. The positioning pin 48 passes through the scale 47 and is connected to the scale 47. The rotation of the positioning pin 48 drives the deflection plate 44 to deflect synchronously.

[0029] The working principle of this utility model is as follows: When vehicle exhaust needs to be tested, the exhaust gas first enters the transverse exhaust pipe 1, and then flows through the connector 3 into the longitudinal exhaust pipe 2 connected to it vertically, and finally delivers the exhaust gas to the emission detector connected to the bottom of the longitudinal exhaust pipe 2.

[0030] During exhaust gas transmission, the exhaust gas flow rate can be adjusted via regulating valves 4 installed on the transverse exhaust pipe 1 and the longitudinal exhaust pipe 2. During adjustment, the operator turns handle 43, which in turn rotates the deflector plate 44 at the top. Since the positioning pin 48 passes through and is connected to the deflector plate 44, the rotation of the deflector plate 44 synchronously drives the positioning pin 48 to rotate. Simultaneously, the positioning pin 48 passes through and is connected to the scale 47; therefore, when the positioning pin 48 rotates, the scale 47 also rotates accordingly. The operator can visually understand the adjustment range through the scale on the scale 47.

[0031] The bottom end of the positioning column 48 is connected to a regulating valve plate installed inside the longitudinal exhaust pipe 2. Rotation of the positioning column 48 will cause the regulating valve plate to rotate synchronously. Since the regulating valve plate is disc-shaped and its diameter matches the diameter of the longitudinal exhaust pipe 2, its rotation can change the size of the flow cross section formed between it and the inner wall of the pipe, thereby achieving fine adjustment of the exhaust gas flow.

[0032] During the rotation of the deflection disk 44, the arc-shaped deflection cavity 45 formed on the surface of the deflection disk 44 moves along the limiting frame 46 that is engaged inside it. The bottom end of the limiting frame 46 is mounted on the surface of the mounting frame 41, which can limit and guide the rotation of the deflection disk 44, ensuring the stability of the adjustment process. The mounting frame 41 is fixedly connected to the surface of the transverse exhaust pipe 1 and the longitudinal exhaust pipe 2, providing mounting support for the various components of the regulating valve 4. The regulating cavity 42 is formed on the surface of the mounting frame 41, providing space for the movement of related components.

[0033] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A motor vehicle emission testing device, characterized in that, It includes a horizontal exhaust pipe (1) and a vertical exhaust pipe (2), and both the horizontal exhaust pipe (1) and the vertical exhaust pipe (2) are equipped with regulating valves (4); the horizontal exhaust pipe (1) is inserted into the inside of the connector (3); The regulating valve (4) includes: Mounting bracket (41), which is fixedly connected to the surface of the transverse exhaust pipe (1) and the longitudinal exhaust pipe (2); An adjustment cavity (42) is formed on the surface of the mounting bracket (41); A handle (43) is disposed on the surface of the mounting bracket (41); A deflection disk (44) is mounted on top of the handle (43); A deflection cavity (45) is formed in an arc shape on the surface of the deflection disk (44); A limiting frame (46) is snapped into and positioned inside the deflection cavity (45), and the bottom end of the limiting frame (46) is mounted on the surface of the mounting frame (41). A scale (47) is provided on the scale, and the scale (47) is disposed on the surface of the deflection disk (44); The positioning post (48) penetrates the surface of the deflection disk (44), and the bottom end of the positioning post (48) is connected to an adjusting valve plate, which is installed in the longitudinal exhaust pipe (2).

2. The motor vehicle emission testing device as described in claim 1, characterized in that, The horizontal exhaust pipe (1) and the vertical exhaust pipe (2) are connected vertically, and the connection between the horizontal exhaust pipe (1) and the vertical exhaust pipe (2) is connected by a connector (3).

3. The motor vehicle emission testing device as described in claim 1, characterized in that, The regulating valve plate is disc-shaped, and the positioning column (48) is connected through the center of the regulating valve plate. The diameter of the regulating valve plate matches the diameter of the longitudinal exhaust pipe (2).

4. The motor vehicle emission testing device as described in claim 1, characterized in that, The positioning post (48) passes through the dial (47) and is connected to the dial (47). The rotation of the positioning post (48) drives the deflection disk (44) to deflect synchronously.

5. The motor vehicle emission testing device as described in claim 1, characterized in that, The bottom end of the longitudinal exhaust pipe (2) is connected to the emission detector.

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