An exhaust gas sampling and analyzing device for vehicle inspection

Abstract

The utility model provides a kind of exhaust sampling analysis device for vehicle inspection belongs to automobile detection technical field, including sampling analysis device main part, clamping sealing assembly includes installation base, the upper side of installation base is movably connected with movable seat, the outside of movable seat is fixedly installed with handle, the surface of movable seat is equipped with sliding slot, the inner surface of installation base is fixedly installed with locating plate, the inboard of movable seat is fixedly installed with ear plate, and rotatingly connected with motion lever on ear plate, rotatingly connected with sealing plate on motion lever through pin shaft, and sealing plate and locating plate are movably connected by locating bolt between sealing plate and locating plate.The utility model is around the design of exhaust pipe by multiple groups of arc sealing plate, can adapt to exhaust pipe of different diameters, realize stable clamping by adjusting movable seat position, compared with the mode that bolt is adjusted clamping plate in prior art needs to be rotated gradually, the adaptation efficiency of different specifications exhaust pipe and operation convenience are significantly improved.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle inspection technology and relates to an exhaust sampling and analysis device for vehicle inspection. Background Technology

[0002] In the field of vehicle testing technology, sampling and analyzing automobile engine exhaust is a key step in evaluating engine performance and emission indicators.

[0003] In the prior art, there are many solutions for the design of exhaust sampling devices. For example, Chinese patent literature discloses an exhaust sampling device for automobile engine testing (publication number: CN221148212U). This device includes a sampling cylinder, a sampling port, a clamping mechanism, a sealing assembly, and a volume control mechanism. It fixes exhaust pipes of different specifications by adjusting bolts and clamping plates, improves the sealing effect by using sealing rings and elastic rings, and adjusts the sampling volume by using a volume control mechanism composed of a sliding rod, a sealing plate, and a spring. This solves the problems of exhaust pipe fixation and volume control during the sampling process to a certain extent.

[0004] However, practical experience has shown that the aforementioned existing technologies still have the following shortcomings:

[0005] Insufficient ease of operation: The clamping mechanism uses adjusting bolts to adjust the clamping plate to fix the exhaust pipe. For exhaust pipes of different diameters, the bolts need to be rotated repeatedly. Four sets of bolts need to be rotated repeatedly to achieve fixation. The operation process is cumbersome and difficult to meet the needs of rapid on-site testing.

[0006] Based on this, we propose an exhaust gas sampling and analysis device for vehicle inspection. Utility Model Content

[0007] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an exhaust gas sampling and analysis device for vehicle inspection. The technical problem this invention aims to solve is: how to improve operational portability and achieve rapid operation.

[0008] The objective of this utility model can be achieved through the following technical solutions:

[0009] A vehicle inspection exhaust sampling and analysis device includes a sampling and analysis device body, which includes a sampling cylinder and a sampling port. The sampling cylinder is connected to the sampling port, and a clamping and sealing assembly is connected to the top of the sampling port.

[0010] The clamping and sealing assembly includes a mounting base, which is fixedly connected to the sampling port. A movable seat is movably connected to the top of the mounting base, and a handle is fixedly installed on the outer side of the movable seat. A sliding groove is formed on the surface of the movable seat. A limit block is fixedly connected to the top of the mounting base and engages with the inner side of the sliding groove. A positioning plate is fixedly installed on the inner surface of the mounting base, and an ear plate is fixedly installed on the inner side of the movable seat. A moving rod is rotatably connected to the ear plate, and a sealing plate is rotatably connected to the moving rod via a pin. The sealing plate and the positioning plate are movably connected via a positioning bolt.

[0011] The working principle of this utility model is as follows: the operator holds the handle and rotates it to drive the movable seat to rotate. At this time, the movable seat slides on the limiting block through the sliding groove. The ear plate on the inner side of the movable seat drives the moving rod to rotate, and the moving rod drives the sealing plate to rotate through the pin. The sealing plate deflects around the positioning bolt. Multiple sets of sealing plates thus complete the clamping and fixing of the exhaust pipe, improving the ease of operation and enabling quick operation.

[0012] A hole is provided in the center of the positioning plate, and the exhaust pipe passes through the center of the hole.

[0013] With the above structure, when it is necessary to sample the exhaust pipe of a car engine, the exhaust pipe is passed through the hole in the center of the positioning plate to achieve the detection of exhaust gas.

[0014] The sealing plate is provided in multiple sets, which surround the outer edge of the exhaust pipe, and the edge of the sealing plate is arc-shaped.

[0015] Using the above structure, multiple sealing plates form a surrounding clamping structure. By adjusting the position of the movable seat, it can accommodate exhaust pipes of different diameters. The arc-shaped edge can tightly fit the outer wall of the exhaust pipe, and stable clamping can be achieved through the mechanical structure regardless of the pipe diameter.

[0016] The limiting block is T-shaped, and the lower top of the limiting block slides against the top of the sliding groove.

[0017] With the above structure, after the T-shaped limiting block is embedded in the sliding groove, the contact between its top and the inner wall of the groove can limit the vertical displacement range of the movable seat, while ensuring that the movable seat can only slide along the trajectory of the sliding groove, avoiding deviation or shaking.

[0018] The surface of the sampling tube is provided with an observation window, which is made of transparent glass.

[0019] With the above structure, the sampling situation can be observed through the observation window on the surface of the sampling cylinder, and the flow rate of the exhaust gas entering the sampling cylinder can be adjusted by the flow control valve on the side to control the sampling speed.

[0020] A flow control valve is fixed to the side of the sampling cylinder.

[0021] By adopting the above structure, the flow rate of exhaust gas entering the sampling cylinder can be controlled in real time by adjusting the opening of the flow control valve, thus avoiding sampling volume errors caused by exhaust pressure fluctuations.

[0022] The sampling cylinder has a piston head inside, which fits against the inner wall of the sampling cylinder. A return spring, which is a tower spring, is fixedly connected to the bottom end of the piston head.

[0023] With the above structure, as exhaust gas continuously enters the sampling cylinder, the piston head moves downwards, and the compression of the return spring gradually increases. When the piston head is observed to have moved to the position corresponding to the required sampling volume, the flow control valve is closed to stop the exhaust gas from entering, thus completing the fixed-volume sampling. The tower spring-type return spring has good stability and reset capability, ensuring the accuracy of the piston head position and thus guaranteeing the precision of the sampling volume.

[0024] Compared with existing technologies, this vehicle exhaust sampling and analysis device has the following advantages:

[0025] 1. This utility model, through the design of multiple sets of arc-shaped sealing plates surrounding the exhaust pipe, can adapt to exhaust pipes of different diameters. Stable clamping is achieved by adjusting the position of the movable seat. Compared with the existing technology, which requires adjusting the clamping plate by rotating the bolts one by one, it significantly improves the adaptability and ease of operation for exhaust pipes of different specifications.

[0026] 2. The transparent glass observation window of this utility model, combined with the flow control valve, allows for real-time observation of the sampling situation and adjustment of the exhaust gas flow rate, avoiding volume errors caused by pressure fluctuations. It can also assist in precise volume calibration, improving sampling accuracy and the reliability of test results.

[0027] 3. This utility model, through the setting of piston head and tower spring return spring in the sampling cylinder, can complete fixed volume sampling by piston movement. The stability and return capability of tower spring ensure accurate piston position and accurate sampling volume, meeting the sampling accuracy requirements of different detection scenarios. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0029] Figure 2 This is a schematic diagram of the exhaust pipe being inserted into the sampling port of this utility model.

[0030] Figure 3 This is a schematic diagram of the connection structure of the clamping and sealing component in this utility model.

[0031] Figure 4 This is a schematic diagram of the piston head connection structure in this utility model.

[0032] In the diagram: 1. Main body of the sampling and analysis device; 2. Sampling cylinder; 3. Sampling port; 4. Clamping and sealing assembly; 41. Mounting base; 42. Movable seat; 421. Ear plate; 43. Handle; 44. Sliding groove; 45. Limiting block; 46. Positioning plate; 47. Moving rod; 48. Pin; 49. Sealing plate; 410. Positioning bolt; 5. Observation window; 6. Flow control valve; 7. Piston head; 8. Return spring; 9. Exhaust pipe. Detailed Implementation

[0033] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0034] like Figures 1-4 As shown, a vehicle exhaust sampling and analysis device includes a sampling and analysis device body 1. The sampling and analysis device body 1 includes a sampling cylinder 2 and a sampling port 3. The sampling cylinder 2 is connected to the sampling port 3. A detection component is provided inside the sampling cylinder 2. A display screen connected to the detection component by wire is provided on the outside of the sampling cylinder 2. It is used to perform detection and analysis on vehicle exhaust after sampling. The detection component and the display screen are existing detection technologies. This application has not improved them and will not describe them in detail here. A clamping and sealing component 4 is connected to the top of the sampling port 3.

[0035] The clamping and sealing assembly 4 includes a mounting base 41, which is fixedly connected to the sampling port 3. A movable seat 42 is movably connected to the top of the mounting base 41. A handle 43 is fixedly installed on the outer side of the movable seat 42. A sliding groove 44 is provided on the surface of the movable seat 42. A limit block 45 is fixedly connected to the top of the mounting base 41 and engages with the inner side of the sliding groove 44. A positioning plate 46 is fixedly installed on the inner surface of the mounting base 41. An ear plate 421 is fixedly installed on the inner side of the movable seat 42. A moving rod 47 is rotatably connected to the ear plate 421. A sealing plate 49 is rotatably connected to the moving rod 47 via a pin 48. The sealing plate 49 and the positioning plate 46 are movably connected via a positioning bolt 410.

[0036] With the above structure, the operator holds the handle 43 and rotates it to rotate the movable seat 42. At this time, the movable seat 42 slides on the limiting block 45 through the sliding groove 44. The ear plate 421 on the inner side of the movable seat 42 drives the moving rod 47 to rotate. The moving rod 47 drives the sealing plate 49 to rotate through the pin 48. The sealing plate 49 deflects around the positioning bolt 410. Multiple sets of sealing plates 49 thus complete the clamping and fixing of the exhaust pipe 9.

[0037] A hole is provided at the center of the positioning plate 46, and the exhaust pipe 9 passes through the center of the hole.

[0038] With the above structure, when it is necessary to sample the exhaust pipe 9 of the car engine, the exhaust pipe 9 is passed through the hole in the center of the positioning plate 46 to achieve the detection of exhaust gas.

[0039] Multiple sets of sealing plates 49 are provided, and the multiple sets of sealing plates 49 surround the outer periphery of the exhaust pipe 9, with the edges of the sealing plates 49 being arc-shaped.

[0040] Using the above structure, multiple sealing plates 49 form a surrounding clamping structure. By adjusting the position of the movable seat 42, it can accommodate exhaust pipes 9 of different diameters. The arc-shaped edge can fit tightly against the outer wall of the exhaust pipe 9, and stable clamping can be achieved through the mechanical structure regardless of the pipe diameter.

[0041] The limiting block 45 is T-shaped, and the lower side of the top of the limiting block 45 slides against the top of the sliding groove 44.

[0042] With the above structure, after the T-shaped limiting block 45 is embedded in the sliding groove 44, the contact between its top end and the inner wall of the groove can limit the vertical displacement range of the movable seat 42, while ensuring that the movable seat 42 can only slide along the trajectory of the sliding groove 44, avoiding deviation or shaking.

[0043] The surface of the sampling tube 2 is provided with an observation window 5, which is made of transparent glass.

[0044] With the above structure, the sampling situation can be observed through the observation window 5 on the surface of the sampling cylinder 2, and the flow rate of the exhaust gas entering the sampling cylinder 2 can be adjusted by the flow control valve 6 on the side to control the sampling speed.

[0045] A flow control valve 6 is fixed to the side of the sampling cylinder 2.

[0046] By adopting the above structure, the flow rate of exhaust gas entering the sampling cylinder 2 can be controlled in real time by adjusting the opening of the flow control valve 6, thus avoiding sampling volume errors caused by exhaust pressure fluctuations.

[0047] The sampling cylinder 2 is equipped with a piston head 7 inside. The piston head 7 is in contact with the inner wall of the sampling cylinder 2. A return spring 8 is fixedly connected to the bottom end of the piston head 7. The return spring 8 is a tower spring.

[0048] Using the above structure, as exhaust gas continuously enters the sampling cylinder 2, the piston head 7 moves downwards continuously, and the compression of the return spring 8 gradually increases. When the piston head 7 is observed to have moved to the position corresponding to the required sampling volume, the flow control valve 6 is closed to stop the exhaust gas from entering, thus completing the fixed-volume sampling. The tower spring-type return spring 8 has good stability and reset capability, which can ensure the accuracy of the piston head 7 position, thereby ensuring the accuracy of the sampling volume.

[0049] The working principle of this utility model:

[0050] This vehicle inspection exhaust sampling and analysis device mainly consists of a sampling and analysis device body 1, which includes a sampling cylinder 2 and a sampling port 3. The top of the sampling port 3 is equipped with a clamping and sealing assembly 4. When it is necessary to sample the exhaust pipe 9 of the automobile engine, the exhaust pipe 9 is passed through the hole in the center of the positioning plate 46.

[0051] The operator grips handle 43 and rotates it, causing the movable seat 42 to rotate. The movable seat 42 then slides on the limiting block 45 via the sliding groove 44. The ear plate 421 on the inner side of the movable seat 42 drives the moving rod 47 to rotate. The moving rod 47, via the pin 48, drives the sealing plate 49 to rotate. The sealing plate 49 deflects around the positioning bolt 410, and multiple sets of sealing plates 49 thus clamp and fix the exhaust pipe 9. Multiple sets of arc-shaped sealing plates 49 surround the outer edge of the exhaust pipe 9, accommodating exhaust pipes of different specifications and improving the applicability of the device.

[0052] Exhaust gas from the car engine enters the sampling cylinder 2 through the exhaust pipe 9. The piston head 7 inside the sampling cylinder 2 is in contact with the inner wall of the sampling cylinder 2. After the exhaust gas enters, it pushes the piston head 7 downward, and the return spring 8 at the bottom of the piston head 7 is compressed.

[0053] Operators can observe the sampling situation through the observation window 5 on the surface of the sampling cylinder 2, and at the same time adjust the flow rate of the exhaust gas entering the sampling cylinder 2 through the flow control valve 6 on the side to control the sampling speed.

[0054] As exhaust gas continuously enters the sampling cylinder 2, the piston head 7 moves downwards, and the compression of the return spring 8 gradually increases. When the piston head 7 is observed to have moved to the position corresponding to the required sampling volume, the flow control valve 6 is closed to stop the exhaust gas from entering, thus completing the fixed-volume sampling. The tower spring-type return spring 8 has good stability and reset capability, which can ensure the accuracy of the piston head 7 position and thus guarantee the accuracy of the sampling volume.

[0055] In summary, the design of multiple sets of arc-shaped sealing plates surrounding the exhaust pipe can accommodate exhaust pipes of different diameters. Stable clamping is achieved by adjusting the position of the movable seat. Compared with the existing technology that requires adjusting the clamping plate by rotating the bolts one by one, this design significantly improves the efficiency of adapting to exhaust pipes of different specifications and the ease of operation.

[0056] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A vehicle inspection exhaust sampling and analysis device, comprising a sampling and analysis device body (1), characterized in that, The main body (1) of the sampling and analysis device includes a sampling tube (2) and a sampling port (3). The sampling tube (2) is connected to the sampling port (3), and a clamping and sealing assembly (4) is connected to the top of the sampling port (3). The clamping and sealing assembly (4) includes a mounting base (41), which is fixedly connected to the sampling port (3). A movable seat (42) is movably connected above the mounting base (41). A handle (43) is fixedly installed on the outer side of the movable seat (42). A sliding groove (44) is opened on the surface of the movable seat (42). A limiting block (45) is fixedly connected above the mounting base (41). The limiting block (45) is engaged with the inner side of the sliding groove (44). A positioning plate (46) is fixedly installed on the inner surface of the mounting base (41). An ear plate (421) is fixedly installed on the inner side of the movable seat (42). A moving rod (47) is rotatably connected to the ear plate (421). A sealing plate (49) is rotatably connected to the moving rod (47) through a pin (48). The sealing plate (49) and the positioning plate (46) are movably connected through a positioning bolt (410).

2. The exhaust gas sampling and analysis device for vehicle inspection according to claim 1, characterized in that, The positioning plate (46) has a hole at its center, through which the exhaust pipe (9) passes.

3. The exhaust gas sampling and analysis device for vehicle inspection according to claim 2, characterized in that, The sealing plate (49) is provided in multiple sets, and the multiple sets of sealing plates (49) surround the outer periphery of the exhaust pipe (9), and the edge of the sealing plate (49) is arc-shaped.

4. The exhaust gas sampling and analysis device for vehicle inspection according to claim 1, characterized in that, The limiting block (45) is T-shaped, and the lower side of the top of the limiting block (45) slides against the top of the sliding groove (44).

5. The exhaust gas sampling and analysis device for vehicle inspection according to claim 1, characterized in that, The surface of the sampling tube (2) is provided with an observation window (5), which is made of transparent glass.

6. The exhaust gas sampling and analysis device for vehicle inspection according to claim 1, characterized in that, A flow control valve (6) is fixed to the side of the sampling cylinder (2).

7. The exhaust gas sampling and analysis device for vehicle inspection according to claim 1, characterized in that, The sampling cylinder (2) is provided with a piston head (7) inside. The piston head (7) is attached to the inner wall of the sampling cylinder (2). A return spring (8) is fixedly connected to the bottom end of the piston head (7). The return spring (8) is a tower spring.

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