A three-way catalytic high and low temperature anti-aging tester and its testing method

Abstract

The present invention relates to the technical field of three-way catalytic testing, and discloses a high and low temperature anti-aging testing machine for three-way catalysts and a testing method thereof, including a testing machine body, a monitoring tube, a channel group, a driving component, a sealing component, a transposition monitoring component and a stirring component. By setting a normally open channel and three surrounding channels with different functions, the present invention realizes multi-dimensional gas detection and can comprehensively obtain the data of the gas after catalysis by the three-way catalytic converter under different working conditions. Channel 1 is used for static gas detection to analyze the catalytic effect under stable working conditions; Channel 2 has a unique transposition monitoring component, which uses spiral slide rods with different rotation directions to stir the gas at multiple angles by the detection probe to obtain multi-element catalytic performance data; Channel 3 simulates a complex air flow environment to detect non-static stirred gas. This design makes the testing process highly automated, and each component cooperates to achieve a rapid switching of the detection state. The comprehensive data collection significantly improves the accuracy of the evaluation of the high and low temperature anti-aging performance of the three-way catalytic converter.

Description

Technical Field

[0001] The present invention belongs to the technical field of three-way catalytic testing, and specifically relates to a high and low temperature anti-aging testing machine for three-way catalysts and a testing method thereof. Background Art

[0002] In the automotive industry, as a key component for controlling exhaust emissions and purifying waste gases, the performance of the three-way catalytic converter directly affects whether the vehicle exhaust meets the standards and the degree of environmental pollution. With the increasingly strict environmental protection standards, the performance requirements for three-way catalytic converters are also getting higher and higher. In actual use, the three-way catalytic converter needs to withstand the high and low temperature changes of the exhaust gas discharged from the vehicle engine and complex gas components, which poses a severe test to its anti-aging performance. Among them, the high and low temperature test standard of the three-way catalytic converter is to analyze and monitor the state and components of the exhaust gas.

[0003] The detection channels of existing testing machines are designed relatively simply and have a single function. They can only be detected in a single state and cannot obtain rich data for in-depth analysis of the working mechanism and anti-aging performance of the three-way catalytic converter. Each time different states need to be changed, multiple drive sources need to work together, which not only increases the equipment cost and the probability of failure, but also makes the operation and maintenance more difficult, affecting the test efficiency and accuracy.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] In order to solve the technical problems that the detection channels of existing testing machines are designed relatively simply and have a single function, they can only be detected in a single state and cannot obtain rich data for in-depth analysis of the working mechanism and anti-aging performance of the three-way catalytic converter. Each time different states need to be changed, multiple drive sources need to work together, which not only increases the equipment cost and the probability of failure, but also makes the operation and maintenance more difficult, affecting the test efficiency and accuracy, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A high and low temperature anti-aging testing machine for three-way catalysts includes a testing machine body and a monitoring pipe provided at its exhaust position.

[0007] A channel group is provided inside the monitoring pipe. The channel group includes a normally open channel and channels one, two, and three surrounding its side wall. Detection probes are installed inside the channel group.

[0008] A driving component is provided outside the monitoring pipe. The driving component includes two guiding slopes corresponding to channels one and two and a positioning slope corresponding to channel two.

[0009] Sealing components are provided on channels one and two. The sealing components include sealing plates that slide along the outer edge of the guiding slope to seal the corresponding channels.

[0010] Inside the second channel, there is a transposition monitoring component. The transposition monitoring component includes a pair of collars installed with detection probes, and the pair of collars slide along the positioning slope for changing the monitoring position. The detection probes on each collar slide on spiral slide bars with different rotation directions corresponding to them, and spoiler plates are installed on the detection probes.

[0011] Inside the third channel, there is a stirring component.

[0012] As a preferred embodiment of the present invention, support legs are installed at the bottom of the testing machine body. Anti-slip pads are installed at the bottom of the support legs. An air inlet pipe is installed on the side wall of the testing machine body. An exhaust pipe is installed at the air outlet position of the testing machine body. One end of the exhaust pipe is connected to the monitoring pipe, and the other end of the exhaust pipe is installed with an air outlet pipe. A base is installed on the testing machine body, and a substrate is installed on the base. The substrate is welded to the bottoms of the exhaust pipe and the air outlet pipe.

[0013] As a preferred embodiment of the present invention, the driving component further includes a positioning ring. The positioning ring is rotatably installed on the outer edge of the monitoring pipe. The inner side wall of the positioning ring is respectively connected to the guiding slope and the positioning slope. A slide rail is installed on the side wall of the positioning ring, and a slide seat is slidably arranged on the slide rail. The slide seat is fixedly installed on the testing machine body.

[0014] As a preferred embodiment of the present invention, a driven gear is installed on the side wall of the positioning ring. A driving gear is meshed on the side wall of the driven gear. A transmission shaft is installed at the rotation center of the driving gear, and a driving motor is installed at the upper end of the transmission shaft. The driving motor is welded to the testing machine body.

[0015] As a preferred embodiment of the present invention, slide plates are installed at both ends of the sealing plate. Guide rods are movably installed through the inside of the slide plates. Guide seats are installed at both ends of the guide rods. The guide seats are welded to the side wall of the monitoring pipe. Guide springs are sleeved on the guide rods. One end of the guide spring is clamped on the guide seat, and the other end of the guide spring is clamped on the slide plate.

[0016] As a preferred embodiment of the present invention, a vertical rod is installed vertically on the sealing plate. A synchronous plate is installed on the vertical rod. A synchronous seat is installed at the center position of the synchronous plate. A guide wheel is installed on the synchronous seat. The guide wheel is in contact with the guiding slope.

[0017] As a preferred embodiment of the present invention, a guide rail is provided inside the collar, and the detection probe housing slides on the guide rail. One end of the spiral slide rod is provided with a fixed seat, and the fixed seat is installed on the inner wall of the second channel. The other end of the spiral slide rod is provided with a positioning plate for limiting. A plurality of pairs of spoiler blocks are installed on the surface of the spoiler plate. A push rod is installed on the collar, and the push rod is slidably arranged in a sliding cavity opened on the inner wall of the second channel. A sealing cavity is horizontally opened at the central position of the sliding cavity, and a piston plate is slidably arranged inside the sealing cavity, and the piston plate is connected to the end of the push rod.

[0018] As a preferred embodiment of the present invention, a push plate is installed on the top of the piston plate. The push plate movably penetrates through a notch opened on the surface of the synchronous plate. A connecting rod is installed on the top of the push plate. A ball is installed at the end of the connecting rod, and the ball is adapted to the positioning slope. A limiting rod is movably penetrated and inserted inside the push plate. Both ends of the limiting rod are installed in the sliding cavity, and a limiting spring is sleeved on the limiting rod. One end of the limiting spring is clamped on the side wall of the sliding cavity, and the other end of the limiting spring is clamped on the push plate.

[0019] As a preferred embodiment of the present invention, the stirring assembly includes a stirring shaft, and the stirring shaft is placed in the third channel. A connecting seat is installed on the stirring shaft, and the connecting seat is installed on the side wall of the third channel. Stirring rods are installed around the side wall of the stirring shaft, and a flow-around fan blade is installed at the end of the stirring shaft.

[0020] As a preferred embodiment of the present invention, the test method of a three-way catalytic high and low temperature anti-aging tester is as follows:

[0021] Step 1: Equipment preparation, install the three-way catalytic converter into the tester body;

[0022] Step 2: Test environment simulation, introduce simulated exhaust gas into the tester body through the intake pipe, use the temperature control system of the tester body to simulate the high and low temperature environment in the actual operation of the vehicle, make the exhaust gas flow through the three-way catalytic converter in the simulated environment, simulate the real working conditions, and start the three-way catalytic high and low temperature anti-aging test process;

[0023] Step 3: Initial data collection, when the exhaust gas flows into the monitoring pipe, the detection probe in the normally open channel continuously detects the exhaust gas just flowing in from the exhaust pipe, and obtains parameters such as the composition, concentration, and temperature of the exhaust gas in the initial state, providing basic comparison data for subsequent detections in different states;

[0024] Step 3: Static gas detection, start the drive motor to drive the positioning ring to rotate, and the guiding slope drives the sealing plate to seal the first channel. The detection probe in this channel detects the static gas to analyze the catalytic effect of the three-way catalytic converter under stable working conditions;

[0025] Step 4: Static stirring and position-changing detection. The guiding slope rotates, and the positioning slope pushes the ball bearings, causing the collar to slide along the positioning slope to change the monitoring position. At the same time, the detection probe moves along the spiral slide rod with different rotation directions, and the spoiler disturbs the gas at multiple angles. The detection probe obtains the catalytic performance data under different positions and gas mixing states.

[0026] Step 5: Non-static stirring detection. The exhaust gas impacts the flow-around fan blades in Channel 3, driving the stirring shaft to stir the exhaust gas. The detection probe detects the non-static stirring gas to evaluate the performance of the three-way catalytic converter under complex airflows.

[0027] Step 6: Result evaluation. Comprehensive detection data of each channel and test environment parameters are used to comprehensively evaluate the high and low temperature anti-aging performance of the three-way catalytic converter, and the test results are obtained.

[0028] The present invention has the following beneficial effects compared with the prior art:

[0029] By setting a normally open channel and three surrounding channels with different functions, the present invention can detect the exhaust gas in multiple states such as initial, static, variable position with static stirring, and non-static stirring, comprehensively obtain the data of the gas after catalysis by the three-way catalytic converter under different working conditions, with rich detection dimensions, more accurate evaluation results, and can fully reflect the actual performance of the three-way catalytic converter. Among them, Channel 1 realizes static gas detection, providing data for analyzing the catalytic effect of the three-way catalytic converter under stable working conditions; Channel 2 can not only detect statically, but also through a unique position-changing monitoring component, use spiral slide rods with different rotation directions to make the detection probe stir the gas at multiple angles, and obtain the catalytic performance data under different positions and gas mixing states; Channel 3 simulates a complex airflow environment, detects non-static stirring gas, is more in line with the actual exhaust gas flow situation of the vehicle, helps to deeply evaluate the performance of the three-way catalytic converter, and the structures inside the above channels are all realized by one driving source, with convenient and stable operation; the entire test process has a high degree of automation, and each component works together to quickly realize the switching of different detection states, greatly improving the test efficiency. At the same time, the comprehensive data obtained from multi-state detection effectively improves the accuracy of the evaluation of the high and low temperature anti-aging performance of the three-way catalytic converter.

[0030] The following further describes in detail the specific implementation manners of the present invention in conjunction with the accompanying drawings. Description of the Drawings

[0031] In the drawings:

[0032] Figure 1 is a three-dimensional structure schematic diagram of a three-way catalytic high and low temperature anti-aging tester;

[0033] Figure 2 is an overall structure schematic diagram of a three-way catalytic high and low temperature anti-aging tester;

[0034] Figure 3For a three-way catalytic high and low temperature anti-aging test machine Figure 2 Enlarged view of part A in

[0035] Figure 4 Schematic diagram of the partial structure of a three-way catalytic high and low temperature anti-aging test machine Figure 1 ;

[0036] Figure 5 For a three-way catalytic high and low temperature anti-aging test machine Figure 4 Enlarged view of part B in

[0037] Figure 6 Schematic diagram of the partial structure of a three-way catalytic high and low temperature anti-aging test machine Figure 2 ;

[0038] Figure 7 Cross-sectional view of the first channel of a three-way catalytic high and low temperature anti-aging test machine;

[0039] Figure 8 Cross-sectional view of the second channel of a three-way catalytic high and low temperature anti-aging test machine;

[0040] Figure 9 For a three-way catalytic high and low temperature anti-aging test machine Figure 8 Enlarged view of part C in

[0041] Figure 10 For a three-way catalytic high and low temperature anti-aging test machine Figure 8 Enlarged view of part D in

[0042] Figure 11 Schematic diagram of the partial structure of a three-way catalytic high and low temperature anti-aging test machine Figure 3 ;

[0043] Figure 12 Cross-sectional view of the third channel of a three-way catalytic high and low temperature anti-aging test machine;

[0044] Figure 13 3D diagram of the positioning ring of a three-way catalytic high and low temperature anti-aging test machine.

[0045] In the figure:

[0046] 1. Test machine body; 11. Support legs; 12. Inlet pipe; 13. Exhaust pipe; 131. Outlet pipe; 132. Base; 133. Substrate; 14. Monitoring pipe; 15. Normally open channel; 151. Channel one; 152. Channel two; 153. Channel three; 16. Detection probe;

[0047] 2. Positioning ring; 21. Driven gear; 211. Driving gear; 212. Driving motor; 213. Transmission shaft; 22. Slide; 221. Slide rail; 23. Guide slope; 24. Positioning slope;

[0048] 3. Sealing plate; 31. Vertical rod; 311. Synchronous plate; 312. Synchronous seat; 313. Guide wheel; 32. Slide plate; 321. Guide rod; 322. Guide spring; 323. Guide seat;

[0049] 4. Collar; 41. Spiral slide rod; 411. Fixed seat; 412. Positioning plate; 413. Guide rail; 42. Turbulence plate; 421. Turbulence block; 43. Thrust rod; 431. Slide cavity; 432. Piston plate; 433. Sealing cavity; 44. Push plate; 441. Limit rod; 442. Limit spring; 443. Notch; 444. Connecting rod; 445. Ball;

[0050] 5. Stirring shaft; 51. Stirring rod; 52. Connecting seat; 53. Flow-around fan blade. Detailed implementation mode

[0051] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0052] Embodiment 1:

[0053] As Figures 1 to 13 shown, a ternary catalytic high and low temperature anti-aging tester includes a tester body 1 and a monitoring tube 14 provided at its exhaust position.

[0054] A channel group is provided inside the monitoring tube 14. The channel group includes a normally open channel 15 and channels one 151, two 152 and three 153 surrounding its side wall. Detection probes 16 are installed inside the channel group. The advantage of this multi-channel design is that it can detect the tail gas from multiple dimensions simultaneously, obtain more comprehensive data, and thus more accurately evaluate the performance of the three-way catalytic converter. The normally open channel 15 can monitor the initial state of the tail gas in real time, providing basic data for subsequent comparison; channels one 151, two 152 and three 153 respectively simulate the tail gas states under different working conditions, providing rich data support for comprehensive evaluation.

[0055] A driving component is provided outside the monitoring tube 14. The driving component includes two guiding slopes 23 installed corresponding to channels one 151 and two 152 and a positioning slope 24 corresponding to channel two 152;

[0056] A sealing component is provided on channels one 151 and two 152. The sealing component includes a sealing plate 3 that slides along the outer edge of the guiding slope 23 for sealing the corresponding channel; through the sealing component, static detection of the gas in a specific channel can be realized.

[0057] Inside the second channel 152, there is a position-changing monitoring component. The position-changing monitoring component includes a pair of collars 4 installed with detection probes 16, and the pair of collars 4 slide along the positioning slope 24 for changing the monitoring position. The detection probes 16 on each collar slide on the spiral slide rods 41 with different rotation directions corresponding to them, and spoiler plates 42 are installed on the detection probes 16. The position-changing monitoring component can enable the detection probes 16 to detect the gas in the second channel 152 from multiple angles and positions. The spoiler plates 42 can also disturb the gas from multiple angles, promote the uniform mixing of the gas, simulate a more complex reaction environment, and make the detection data more accurate.

[0058] Inside the third channel 153, there is a stirring component. It simulates the complex flow conditions of the exhaust gas during the operation of the vehicle, making the test results closer to the actual application scenario and providing a strong basis for evaluating the performance of the three-way catalytic converter under complex airflows.

[0059] As Figure 1 and Figure 2 shown, in the specific implementation, support legs 11 are installed at the bottom of the test machine body 1, and anti-slip pads are installed at the bottom of the support legs 11 to enhance the stability of the test machine during use and avoid affecting the test results due to shaking. An intake pipe 12 is installed on the side wall of the test machine body 1, an exhaust pipe 13 is installed at the gas outlet position of the test machine body 1. One end of the exhaust pipe 13 is connected to the monitoring pipe 14, and an outlet pipe 131 is installed at the other end of the exhaust pipe 13. A base 132 is installed on the test machine body 1, and a substrate 133 is installed on the base 132. The substrate 133 is welded to the bottoms of the exhaust pipe 13 and the outlet pipe 131. The substrate 133 provides a stable support structure for the exhaust pipe and the outlet pipe.

[0060] Embodiment 2:

[0061] Based on Embodiment 1, the difference in this embodiment is that: as Figure 2 , Figure 3 , Figure 6 and Figure 13 shown, the driving component further includes a positioning ring 2. The positioning ring 2 is rotatably installed on the outer edge of the monitoring pipe 14. The inner side wall of the positioning ring 2 is respectively connected to the guiding slope 23 and the positioning slope 24. A slide rail 221 is installed on the side wall of the positioning ring 2, and a sliding seat 22 is slidably arranged on the slide rail 221. The sliding seat 22 is fixedly installed on the test machine body 1. A driven gear 21 is installed on the side wall of the positioning ring 2, and a driving gear 211 is meshed on the side wall of the driven gear 21. The rotation center of the driving gear 211 is installed with a transmission shaft 213, and a driving motor 212 is installed at the end of the transmission shaft 213. The driving motor 212 is welded to the test machine body 1. With this design of the driving component, the rotation of the positioning ring 2 can be accurately controlled by the driving motor 212, and then the positions of the guiding slope 23 and the positioning slope 24 can be accurately controlled, realizing the precise driving of the sealing component and the position-changing monitoring component, and improving the controllability of the test process and the accuracy of the test results.

[0062] As Figure 4 and Figure 5 shown, in the specific implementation manner, sliding plates 32 are installed at both ends of the sealing plate 3. A guiding rod 321 is movably installed through the inside of the sliding plate 32. Guiding seats 323 are installed at both ends of the guiding rod 321. The guiding seats 323 are welded to the side wall of the monitoring pipe 14. A guiding spring 322 is sleeved on the guiding rod 321. One end of the guiding spring 322 is clamped on the guiding seat 323, and the other end of the guiding spring 322 is clamped on the sliding plate 32. After the sealing plate 3 completes the sealing action, the guiding spring 322 can provide the power for its reset, making the device structure more reasonable, the operation more convenient, and improving the use efficiency of the device.

[0063] As Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 10 shown, further, a vertical rod 31 is installed vertically on the sealing plate 3. A synchronous plate 311 is installed on the vertical rod 31. A synchronous seat 312 is installed at the central position of the synchronous plate 311. A guiding wheel 313 is installed on the synchronous seat 312. The guiding wheel 313 is in mutual contact with the guiding slope 23. Through the contact between the guiding wheel 313 and the guiding slope 23, the rotation of the guiding slope 23 can be converted into the linear motion of the sealing plate 3, realizing precise sealing operation, and at the same time ensuring the smoothness of the movement of the sealing plate 3 and improving the sealing effect.

[0064] Example 3:

[0065] Based on the difference between Example 2 and this example: As Figure 8 , Figure 9 , Figure 10 and Figure 11 shown, a guide rail 413 is provided inside the collar 4, and the outer shell of the detection probe 16 slides on the guide rail 413. One end of the spiral slide rod 41 is provided with a fixed seat 411, and the fixed seat 411 is installed on the inner wall of the second channel 152. The other end of the spiral slide rod 41 is provided with a positioning plate 412 for limiting. A number of pairs of spoiler blocks 421 are installed on the surface of the spoiler plate 42. A push rod 43 is installed on the collar 4. The push rod 43 is slidably arranged in a sliding cavity 431 opened on the inner wall of the second channel 152. A sealing cavity 433 is horizontally opened at the central position of the sliding cavity 431, and a piston plate 432 is slidably arranged inside the sealing cavity 433, and the piston plate 432 is connected to the end of the push rod 43. With such a structural design, the detection probe 16 can be stably moved along the spiral slide rod 41 under the drive of the collar 4. At the same time, the spoiler plate 42 and the spoiler blocks 421 can efficiently disturb the gas, and the cooperation of the piston plate 432 and the push rod 43 can realize the precise control of the position of the collar 4, ensuring the accuracy and stability of the detection process.

[0066] AsFigure 8 , Figure 9 , Figure 10 and Figure 11 As shown in Figure 10 , Figure 11 , in the specific embodiment, a push plate 44 is installed on the top of the piston plate 432. The push plate 44 movably penetrates through a notch 443 formed on the surface of the synchronization plate 311. A connecting rod 444 is installed on the top of the push plate 44, and a ball 445 is installed at the end of the connecting rod 444. The ball 445 is adapted to the position of the positioning slope 24. A limiting rod 441 is movably inserted through the push plate 44. Both ends of the limiting rod 441 are installed in the sliding cavity 431, and a limiting spring 442 is sleeved on the limiting rod 441. One end of the limiting spring 442 is clamped on the side wall of the sliding cavity 431, and the other end of the limiting spring 442 is clamped on the push plate 44. The limiting spring 442 can quickly reset the push plate 44 after the pushing action is completed, ensuring the continuous and stable operation of the device and improving the test efficiency.

[0067] As Figure 12 shown, further, the stirring assembly includes a stirring shaft 5, and the stirring shaft 5 is placed in the third channel 153. A connecting seat 52 is installed on the stirring shaft 5, and the connecting seat 52 is installed on the side wall of the third channel 153. Stirring rods 51 are installed around the side wall of the stirring shaft 5, and a flow deflecting fan blade 53 is installed at the end of the stirring shaft 5. The tail gas impacts the flow deflecting fan blade 53 to drive the stirring shaft 5 to rotate, and then stirs the tail gas through the stirring rods 51. Without an additional power source, the structure is simple and energy-efficient, and it can effectively simulate the situation of the tail gas under complex flow conditions.

[0068] The present invention also discloses a test method for a three-way catalytic high and low temperature anti-aging tester, and the steps are as follows:

[0069] Step 1: Equipment preparation, install the three-way catalytic converter into the tester body 1;

[0070] Step 2: Test environment simulation, introduce simulated tail gas into the tester body 1 through the intake pipe 12, and use the temperature control system of the tester body 1 to simulate the high and low temperature environment during the actual operation of the vehicle, so that the tail gas flows through the three-way catalytic converter in the simulated environment, simulate the real working conditions, and start the three-way catalytic high and low temperature anti-aging test process;

[0071] Step 3: Initial data collection, when the tail gas flows into the monitoring pipe 14, the detection probe 16 in the normally open channel 15 detects the tail gas that has just flowed in from the exhaust pipe 13 in real time, and obtains parameters such as the composition, concentration, and temperature of the tail gas in the initial state, providing basic comparison data for subsequent detections in different states;

[0072] Step 3: Static gas detection, start the driving motor 212 to drive the positioning ring 2 to rotate, and the guiding slope 23 drives the sealing plate 3 to seal the first channel 151. The detection probe 16 in this channel detects the static gas to analyze the catalytic effect of the three-way catalytic converter under stable working conditions;

[0073] Step 4: Static stirring and position change detection. The guiding slope 23 rotates, and the positioning slope 24 pushes the ball 445, causing the collar 4 to slide along the positioning slope 24 to change the monitoring position. At the same time, the detection probe 16 moves along the helical slide rod 41 with different rotation directions, and the spoiler 42 disturbs the gas at multiple angles. The detection probe 16 obtains the catalytic performance data under different positions and gas mixing states.

[0074] Step 5: Non-static stirring detection. The exhaust gas impacts the flow fan blade 53 in the channel three 153, driving the stirring shaft 5 to stir the exhaust gas. The detection probe 16 detects the non-static stirring gas to evaluate the performance of the three-way catalytic converter under complex airflows.

[0075] Step 6: Result evaluation. Comprehensive detection data of each channel and test environment parameters are used to comprehensively evaluate the high and low temperature anti-aging performance of the three-way catalytic converter, and the test results are obtained.

[0076] The implementation principle of a high and low temperature anti-aging tester for a three-way catalytic converter and its testing method of the present invention is as follows:

[0077] The operator can first place the three-way catalytic converter into the tester body 1, then input simulated exhaust gas into it through the intake pipe 12, and then the tester body 1 uses its own temperature control system to simulate the high and low temperature environment during actual vehicle operation, allowing the exhaust gas to flow through the three-way catalytic converter in this environment to conduct an anti-aging test on the three-way catalytic converter by simulating the real working conditions (the specific testing principle of the above-mentioned tester body is prior art, and its specific working principle will not be elaborated here).

[0078] After the exhaust gas exits the tester body 1 and enters the monitoring pipe 14, the monitoring pipe 14 starts to perform its detection function. The detection probes 16 in the normally open channel 15 and the channel one 151, channel two 152, and channel three 153 surrounding its sidewall detect parameters such as the composition, concentration, and temperature of the flowing exhaust gas in real time, providing data for preliminarily evaluating the catalytic effect of the three-way catalytic converter under dynamic airflows (the detection probe 16 is prior art, and its working principle will not be elaborated).

[0079] Among them, the normally open channel 15 serves as the detection channel in the initial state. The detection probe 16 in it detects the exhaust gas that has just flowed from the exhaust pipe 13 into the monitoring pipe 14 in real time, obtaining parameters such as the composition, concentration, and temperature of the exhaust gas in the initial state, providing basic comparison data for subsequent detections in different states.

[0080] When static detection of the gas in a specific channel is required, the drive assembly starts to work. The operator can start the drive motor 212, and the output shaft of the drive motor 212 drives the transmission shaft 213 to rotate, thereby causing the drive gear 211 to rotate. The drive gear 211 meshes with the driven gear 21, and then drives the positioning ring 2 to rotate along the outer edge of the monitoring tube 14. At this time, the slide rail 221 on the side wall of the positioning ring 2 slides on the slide seat 22, playing a role in limiting. And because the guiding slope 23 and the positioning slope 24 are connected to the inner side wall of the positioning ring 2, they also rotate when the positioning ring 2 rotates.

[0081] When the guiding slope 23 rotates, the sealing assembly starts to operate. The guiding wheel 313 on the sealing plate 3 slides along the outer edge of the guiding slope 23. Then, the guiding wheel 313, the synchronization seat 312 and the synchronization plate 311 drive the sealing plate 3 connected to the vertical rod 31 to move towards the axis. Finally, the sealing of the channel 151 can be achieved. When the sealing plate 3 slides, the slide plate 32 on the side wall of the sealing plate 3 slides on the guiding rod 321 at this time, and the guiding spring 322 on the guiding rod 321 is compressed synchronously, which facilitates the later reset operation through the guiding spring 322.

[0082] After the sealing assembly finishes moving, the gases in the channel 151 and the channel 152 are in a static state at this time. The detection probe 16 in the channel 151 detects the gas in the static state, obtains the relevant data of the gas in the static state after the three-way catalytic converter catalyzes, so as to analyze its catalytic effect in a stable environment.

[0083] For the channel 152, not only static detection can be realized, but also the sealed gas can be stirred and the detection position can be changed. After the sealing assembly finishes moving, the guiding wheel 313 slides along the outer wall of the arc of the guiding slope 23 at this time, and the sealing plate 3 does not slide at this time.

[0084] However, when the guiding slope 23 corresponding to the channel 152 rotates a certain angle, at this time, the positioning slope 24 on the guiding slope 23 contacts the ball 445. The ball 445 is pushed by the positioning slope 24 and drives the push plate 44 to slide horizontally through the connecting rod 444. At this time, the push plate 44 can also slide on the limiting rod 441 and compress the limiting spring 442, which facilitates the later reset through the limiting spring 442. When the push plate 44 slides, the push plate 44 pushes the piston plate 432 to move in the sealing cavity 433, playing a sealing effect, and can also push the ejector rod 43 to move in the sliding cavity 431, so that the collar 4 slides along the positioning slope 24, realizing the change of the detection position.

[0085] During the movement of the collar 4, the detection probe 16 slides on the guide rail 413 of the collar 4 due to its housing, and the collar 4 drives the detection probe 16 to move along the spiral rods 41 with different helix directions, enabling the detection probe 16 to detect the gas in the second channel 152 from different angles and positions. It is particularly worth mentioning that due to the spiral rods 41 with different helix angles, when the detection probes 16 on both sides move along the spiral rods 41 with different helix directions, the movement trajectories of the spoiler plates 42 on their side walls are different and do not rotate in one direction. This enables the spoiler plates 42 to disturb the enclosed gas from multiple angles, greatly improving the stirring effect on the gas, promoting the uniform mixing of the gas, and simulating a more complex reaction environment.

[0086] At the same time, the spoiler plates 42 and spoiler blocks 421 on the detection probe 16 disturb the enclosed gas during detection, promoting the uniform mixing of the gas and simulating a more complex reaction environment. The detection probe 16 detects the gas in this state, and the obtained data can more comprehensively reflect the catalytic performance of the three-way catalytic converter at different positions and different gas mixing states.

[0087] In the third channel 153, the gas is not in a static state but in a stirred state. When the exhaust gas flows into the third channel 153, the stirring shaft 5 can rely on the impact force of the exhaust gas flow itself to drive the flow-around fan blades 53 to rotate, and then drive the same stirring shaft 5 to rotate. The stirring rods 51 on the stirring shaft 5 stir the exhaust gas to make its composition more uniform. The detection probe 16 in the third channel 153 detects the gas in this non-static but stirred state, providing data support for evaluating the catalytic performance of the three-way catalytic converter under complex gas flow conditions, so as to be closer to the complex flow situation of the exhaust gas during actual vehicle operation.

[0088] By monitoring the detection of the gas in different channels of the monitoring tube 14 in different states such as the initial state (normally open channel), static state (channel one), static stirring and variable detection position (channel two), non-static stirring (channel three), etc., this testing machine can comprehensively and fully evaluate the performance of the three-way catalytic converter, providing more accurate test results for the high and low temperature anti-aging performance of the three-way catalytic converter.

Claims

1. A three-way catalytic high and low temperature anti-aging test machine, comprising a test machine body (1) and a monitoring tube (14) arranged at the exhaust position thereof, characterized in that: A channel group is provided inside the monitoring tube (14), the channel group comprising a normally open channel (15) and channel one (151), channel two (152) and channel three (153) surrounding the side wall thereof, and detection probes (16) are installed inside the channel group; A driving assembly is provided on the outside of the monitoring tube (14), the driving assembly comprising two guide slopes (23) corresponding to the first channel (151) and the second channel (152) and a positioning slope (24) corresponding to the second channel (152); A sealing assembly is provided on the channel 1 (151) and the channel 2 (152), and the sealing assembly comprises a sealing plate (3) which slides along the outer edge of the guide slope (23) and is used to seal the corresponding channel; A transposition monitoring assembly is provided inside the second channel (152), the transposition monitoring assembly comprising a pair of collars (4) on which detection probes (16) are mounted, and the pair of collars (4) slide along the positioning slope (24) for changing the monitoring position, the detection probe (16) on each collar slides on a spiral slide bar (41) with a different rotation direction corresponding thereto, and a spoiler (42) is mounted on the detection probe (16); A stirring assembly is provided inside the channel three (153); A guide rail (413) is provided inside the collar (4), and the outer shell of the detection probe (16) slides on the guide rail (413); a fixing seat (411) is installed at one end of the spiral slide rod (41), and the fixing seat (411) is installed on the inner wall of the second channel (152); a positioning plate (412) having a limiting function is installed at the other end of the spiral slide rod (41); a plurality of pairs of spoiler blocks (421) are installed on the surface of the spoiler plate (42); a push rod (43) is installed on the collar (4), and the push rod (43) is slidably arranged in a sliding cavity (431) provided on the inner wall of the second channel (152); a sealing cavity (433) is transversely provided at the center of the sliding cavity (431), and a piston plate (432) is slidably arranged inside the sealing cavity (433), and the piston plate (432) is connected to the end of the push rod (43); A push plate (44) is installed on the top of the piston plate (432). The push plate (44) movably passes through a notch (443) provided on the surface of the synchronous plate (311). A connecting rod (444) is installed on the top of the push plate (44). A ball (445) is installed at the end of the connecting rod (444). The ball (445) and the positioning slope (24) are mutually adapted. A limit rod (441) is movably inserted and inserted inside the push plate (44). Both ends of the limit rod (441) are installed in the sliding cavity (431). A limit spring (442) is sleeved on the limit rod (441). One end of the limit spring (442) is clamped on the side wall of the sliding cavity (431), and the other end of the limit spring (442) is clamped on the push plate (44).

2. A three-way catalytic high and low temperature anti-aging tester according to claim 1, characterized in that: The bottom of the test machine body (1) is provided with a support leg (11), the bottom of the support leg (11) is provided with an anti-skid pad, the side wall of the test machine body (1) is provided with an air inlet pipe (12), the air outlet position of the test machine body (1) is provided with an exhaust pipe (13), one end of the exhaust pipe (13) is connected to a monitoring pipe (14), the other end of the exhaust pipe (13) is provided with an exhaust pipe (131), the test machine body (1) is provided with a base (132), the base (132) is provided with a substrate (133), and the substrate (133) is welded to the bottom of the exhaust pipe (13) and the exhaust pipe (131).

3. A three-way catalytic high and low temperature anti-aging tester according to claim 1, characterized in that: The drive assembly further comprises a positioning ring (2), wherein the positioning ring (2) is rotatably mounted on the outer edge of the monitoring tube (14), wherein the inner side wall of the positioning ring (2) is respectively connected to the guide slope (23) and the positioning slope (24), wherein a slide rail (221) is mounted on the side wall of the positioning ring (2), wherein a slide seat (22) is slidably mounted on the slide rail (221), and wherein the slide seat (22) is fixedly mounted on the testing machine body (1).

4. A three-way catalytic high and low temperature anti-aging tester according to claim 3, characterized in that: A driven gear (21) is mounted on the side wall of the positioning ring (2), a driving gear (211) is meshed with the side wall of the driven gear (21), a transmission shaft (213) is mounted at the rotation center of the driving gear (211), a driving motor (212) is mounted on the upper end of the transmission shaft (213), and the driving motor (212) is welded to the testing machine body (1).

5. A three-way catalytic high and low temperature anti-aging tester according to claim 1, characterized in that: Slide plates (32) are installed at both ends of the sealing plate (3), a guide rod (321) is movably installed inside the slide plate (32), guide seats (323) are installed at both ends of the guide rod (321), the guide seat (323) is welded to the side wall of the monitoring tube (14), a guide spring (322) is sleeved on the guide rod (321), one end of the guide spring (322) is clamped on the guide seat (323), and the other end of the guide spring (322) is clamped on the slide plate (32).

6. A three-way catalytic high and low temperature anti-aging tester according to claim 1, characterized in that: A vertical rod (31) is vertically mounted on the sealing plate (3), a synchronous plate (311) is mounted on the vertical rod (31), a synchronous seat (312) is mounted at the center of the synchronous plate (311), a guide wheel (313) is mounted on the synchronous seat (312), and the guide wheel (313) and the guide slope (23) are in contact with each other.

7. A three-way catalytic high and low temperature anti-aging tester according to claim 1, characterized in that: The stirring assembly comprises a stirring shaft (5), and the stirring shaft (5) is placed in the third channel (153), a connecting seat (52) is installed on the stirring shaft (5), and the connecting seat (52) is installed on the side wall of the third channel (153), a stirring rod (51) is installed around the side wall of the stirring shaft (5), and a flow-around fan blade (53) is installed at the end of the stirring shaft (5).

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