Three-way catalytic high-low temperature anti-aging testing machine and testing method thereof

Abstract

The invention relates to the technical field of three-way catalysis testing, and discloses a three-way catalysis high-low temperature anti-aging testing machine and a testing method thereof, and the three-way catalysis high-low temperature anti-aging testing machine comprises a testing machine body, a monitoring pipe, a channel group, a driving assembly, a sealing assembly, a transposition monitoring assembly and a stirring assembly. By arranging the normally open channel and the three surrounding channels with different functions, multi-dimensional gas detection is achieved, and data of gas catalyzed by the three-way catalyst under different working conditions can be comprehensively obtained. The channel I is used for detecting static gas and analyzing a stable working condition catalytic effect; a unique transposition monitoring assembly of the second channel enables a detection probe to stir gas in a multi-angle mode through spiral sliding rods with different rotating directions, and multi-element catalytic performance data are obtained; the third channel simulates a complex airflow environment to detect non-static stirring gas. By means of the design, the automation degree of the testing process is high, all the assemblies cooperate to achieve rapid detection state switching, and the accuracy of evaluating the high-low-temperature anti-aging performance of the three-way catalyst is remarkably improved through comprehensive data collection.

Description

Technical Field

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

[0002] In the automotive industry, the three-way catalytic converter is a key component for controlling exhaust emissions and purifying waste gas. Its performance is directly related to whether the automobile exhaust meets the standards and the degree of pollution to the environment. With the increasingly stringent 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 and complex gas composition of the exhaust gas discharged by the automobile engine, 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 composition of the exhaust gas.

[0003] The detection channel design of the existing test machine is relatively simple, with a single function. It can only perform detection 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 a different state needs to be changed, multiple drive sources need to work together, which not only increases the equipment cost and failure probability, but also makes operation and maintenance more difficult, affecting the test efficiency and accuracy.

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

[0005] In order to solve the technical problems that the detection channel design of the existing test machine is relatively simple, the function is single, and the detection can only be performed in a single state, and rich data cannot be obtained to deeply analyze the working mechanism and anti-aging performance of the three-way catalytic converter; each time a different state needs to be changed, multiple driving 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: A three-way catalytic high and low temperature anti-aging test machine comprises a test machine body and a monitoring pipe arranged at the exhaust position of the test machine body.

[0006] A channel group is provided inside the monitoring tube, the channel group includes a normally open channel and channel one, channel two and channel three surrounding the side wall thereof, and detection probes are installed inside the channel group; A driving assembly is provided on the outside of the monitoring tube, and the driving assembly includes two guide slopes corresponding to channel one and channel two and a positioning slope corresponding to channel two; The channel 1 and the channel 2 are provided with sealing assemblies, and the sealing assemblies include sealing plates that slide along the outer edge of the guide slope to seal the corresponding channels; A transposition monitoring assembly is provided inside the second channel, and the transposition monitoring assembly includes a pair of collars with detection probes installed thereon, and the pair of collars slide along the positioning slope to change the monitoring position, and the detection probe on each collar slides on a spiral slide rod with a different rotation direction corresponding thereto, and a spoiler is installed on the detection probe; A stirring component is provided inside the channel three.

[0007] As a preferred embodiment of the present invention, a support leg is installed at the bottom of the testing machine body, an anti-slip pad is installed at the bottom of the support leg, 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 interconnected with the monitoring pipe, and an air outlet pipe is installed at the other end of the exhaust pipe, a base is installed on the testing machine body, a substrate is installed on the base, and the substrate is welded to the bottom of the exhaust pipe and the air outlet pipe.

[0008] As a preferred embodiment of the present invention, the driving assembly also includes a positioning ring, which is rotatably mounted on the outer edge of the monitoring tube, the inner side walls of the positioning ring are respectively interconnected with the guide slope and the positioning slope, the side walls of the positioning ring are installed with slide rails, a slide seat is slidably arranged on the slide rails, and the slide seat is fixedly mounted on the testing machine body.

[0009] 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 on the rotation center of the driving gear, a driving motor is installed on the upper end of the transmission shaft, and the driving motor is welded to the testing machine body.

[0010] As a preferred embodiment of the present invention, slides are installed at both ends of the sealing plate, a guide rod is movably installed inside the slide, guide seats are installed at both ends of the guide rod, the guide seats are welded to the side walls of the monitoring tube, a guide spring is sleeved on the guide rod, 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.

[0011] As a preferred embodiment of the present invention, a vertical rod is vertically installed on the sealing plate, a synchronous plate is installed on the vertical rod, a synchronous seat is installed at the center of the synchronous plate, a guide wheel is installed on the synchronous seat, and the guide wheel and the guide slope are in contact with each other.

[0012] 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, a fixed seat is installed at one end of the spiral slide rod, and the fixed seat is installed on the inner wall of the second channel, a positioning plate with a limiting function is installed at the other end of the spiral slide rod, 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 provided on the inner wall of the second channel, a sealing cavity is transversely provided at the center position of the sliding cavity, and a piston plate is slidably arranged inside the sealing cavity, and the piston plate and the end of the push rod are connected to each other.

[0013] As a preferred embodiment of the present invention, a push plate is installed on the top of the piston plate, and the push plate movably passes through the notch opened on the surface of the synchronization plate. A connecting rod is installed on the top of the push plate, and a ball is installed at the end of the connecting rod, and the position of the ball and the positioning slope are adapted to each other. A limit rod is movably inserted and inserted inside the push plate, and both ends of the limit rod are installed in the sliding cavity, and a limit spring is sleeved on the limit rod, one end of the limit spring is clamped on the side wall of the sliding cavity, and the other end of the limit spring is clamped on the push plate.

[0014] As a preferred embodiment of the present invention, the stirring assembly includes a stirring shaft, and the stirring shaft is placed in channel three, a connecting seat is installed on the stirring shaft, and the connecting seat is installed on the side wall of channel three, a stirring rod is installed around the side wall of the stirring shaft, and a flow-around fan blade is installed at the end of the stirring shaft.

[0015] As a preferred embodiment of the present invention, the testing method of the three-way catalytic high and low temperature anti-aging testing machine comprises the following steps: Step 1: Equipment preparation, install the three-way catalytic converter into the test machine body; Step 2: Test environment simulation: introduce simulated exhaust gas into the test machine body through the air intake pipe, use the temperature control system of the test machine body to simulate the high and low temperature environment of the actual operation of the car, make the exhaust gas flow through the three-way catalytic converter under the simulated environment, simulate the real working condition, and start the high and low temperature anti-aging test process of the three-way catalytic converter; Step 3: Initial data collection: When the exhaust gas flows into the monitoring tube, the detection probe in the normally open channel detects the exhaust gas just flowing in from the exhaust pipe in real time, obtains the composition, concentration, temperature and other parameters of the exhaust gas in the initial state, and provides basic comparative data for subsequent detection under different states; Step 3: Static gas detection, start the drive motor to drive the positioning ring to rotate, and the guide slope drives the sealing plate to seal channel 1. The detection probe in the channel detects static gas and analyzes the catalytic effect of the three-way catalytic converter under stable working conditions; Step 4: Static stirring and transposition detection, the guide slope rotates, the positioning slope pushes the ball, so that the ring slides along the positioning slope to change the monitoring position, and the detection probe moves along the spiral slide bar with different rotation directions, the spoiler disturbs the gas at multiple angles, and the detection probe obtains the catalytic performance data at different positions and gas mixing states; Step 5: Non-static stirring test: the exhaust gas impacts the inner flow fan blades of 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 airflow. Step 6: Result evaluation: Comprehensively evaluate the high and low temperature anti-aging performance of the three-way catalytic converter by integrating the detection data of each channel and the test environment parameters to obtain the test results.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention can detect exhaust gas in various states such as initial, static, static stirring variable position, non-static stirring, etc. by setting a normally open channel and three surround channels with different functions, and comprehensively obtain the data of the gas after catalysis of the three-way catalytic converter under different working conditions, with rich detection dimensions and more accurate evaluation results, which can fully reflect the actual performance of the three-way catalytic converter; wherein channel one realizes static gas detection to provide data for analyzing the catalytic effect of the three-way catalytic converter under stable working conditions; channel two can not only detect statically, but also use a unique transposition monitoring component to make the detection probe stir the gas at multiple angles by using spiral slide bars of different rotation directions to obtain catalytic performance data under different positions and gas mixing states; channel three simulates a complex airflow environment to detect non-static stirring gas, which is more in line with the actual exhaust gas flow conditions of the automobile, and helps to deeply evaluate the performance of the three-way catalytic converter, and the internal structures of the above channels are all realized by a driving source, which is convenient and stable to operate; the entire test process has a high degree of automation, and the components work together to quickly realize the switching of different detection states, which greatly improves the test efficiency. At the same time, the comprehensive data obtained by 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.

[0017] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached picture: Figure 1 It is a three-dimensional structural schematic diagram of a three-way catalytic high and low temperature anti-aging test machine; Figure 2 It is a schematic diagram of the overall structure of a three-way catalytic high and low temperature anti-aging test machine; Figure 3 A three-way catalytic high and low temperature anti-aging test machine Figure 2 Enlarged view of point A in the middle; Figure 4 A schematic diagram of the partial structure of a three-way catalytic high and low temperature anti-aging test machine Figure 1 ; Figure 5 A three-way catalytic high and low temperature anti-aging test machine Figure 4 Enlarged view of point B in the middle; Figure 6 A schematic diagram of the partial structure of a three-way catalytic high and low temperature anti-aging test machine Figure 2 ; Figure 7 A cross-sectional view of a channel of a three-way catalytic high and low temperature anti-aging testing machine; Figure 8 It is a cross-sectional view of two passages of a three-way catalytic high and low temperature anti-aging testing machine; Fig. 9 A three-way catalytic high and low temperature anti-aging test machine Figure 8 Enlarged view of point C in the middle; Fig.10 A three-way catalytic high and low temperature anti-aging test machine Figure 8 Enlarged view of point D in the middle; Fig.11 A schematic diagram of the partial structure of a three-way catalytic high and low temperature anti-aging test machine Figure 3 ; Fig.12 It is a cross-sectional view of three channels of a three-way catalytic high and low temperature anti-aging test machine; Fig.13 This is a three-dimensional diagram of the positioning ring of a three-way catalytic high and low temperature anti-aging testing machine.

[0019] In the figure: 1. Test machine body; 11. Support legs; 12. Inlet pipe; 13. Exhaust pipe; 131. Exhaust pipe; 132. Base; 133. Base plate; 14. Monitoring tube; 15. Normally open channel; 151. Channel 1; 152. Channel 2; 153. Channel 3; 16. Detection probe; 2. Positioning ring; 21. Driven gear; 211. Driving gear; 212. Driving motor; 213. Transmission shaft; 22. Sliding seat; 221. Sliding rail; 23. Guide slope; 24. Positioning slope; 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; 4. collar; 41. spiral slide rod; 411. fixed seat; 412. positioning plate; 413. guide rail; 42. spoiler; 421. spoiler block; 43. push rod; 431. slide chamber; 432. piston plate; 433. sealing chamber; 44. push plate; 441. limit rod; 442. limit spring; 443. notch; 444. connecting rod; 445. ball bearing; 5. stirring shaft; 51. stirring rod; 52. connecting seat; 53. flow-around fan blade. DETAILED DESCRIPTION

[0020] In order to make the purpose, 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 drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0021] Embodiment 1: like Figures 1 to 13 As shown, a three-way catalytic high and low temperature anti-aging test machine includes a test machine body 1 and a monitoring tube 14 arranged at its exhaust position.

[0022] A channel group is provided inside the monitoring tube 14, including a normally open channel 15 and channel one 151, channel two 152 and channel three 153 surrounding its side wall, and a detection probe 16 is installed inside each channel group; the advantage of this multi-channel design is that it can detect exhaust gas from multiple dimensions at the same time, 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 exhaust gas in real time, providing basic data for subsequent comparison; channel one 151, channel two 152 and channel three 153 respectively simulate the exhaust gas state under different working conditions, providing rich data support for comprehensive evaluation.

[0023] A driving assembly is provided on the outside of the monitoring tube 14, and the driving assembly includes two guide slopes 23 corresponding to the channel 1 151 and the channel 2 152 and a positioning slope 24 corresponding to the channel 2 152; A sealing assembly is provided on channel 1 151 and channel 2 152 , and the sealing assembly includes a sealing plate 3 that slides along the outer edge of the guide slope 23 to seal the corresponding channel; through the sealing assembly, static detection of gas in a specific channel can be achieved.

[0024] A transposition monitoring component is provided inside the channel two 152, and the transposition monitoring component includes a pair of rings 4 on which detection probes 16 are installed, and the pair of rings 4 slide along the positioning slope 24 to change the monitoring position, and the detection probe 16 on each ring slides on a spiral slide rod 41 with a corresponding different rotation direction, and a spoiler 42 is installed on the detection probe 16; the transposition monitoring component can enable the detection probe 16 to detect the gas in the channel two 152 from multiple angles and positions, and the spoiler 42 can also disturb the gas at multiple angles to promote uniform mixing of the gas, simulate a more complex reaction environment, and make the detection data more accurate.

[0025] A stirring assembly is provided inside channel three 153. The complex flow of exhaust gas during vehicle operation is simulated to make the test results closer to the actual application scenario, providing a strong basis for evaluating the performance of the three-way catalytic converter under complex airflow.

[0026] like Figure 1 and Figure 2 As shown, in a specific embodiment, a support leg 11 is installed at the bottom of the test machine body 1, and an anti-skid pad is installed at the bottom of the support leg 11 to enhance the stability of the test machine during use and prevent the test results from being affected by shaking. An air inlet pipe 12 is installed on the side wall of the test machine body 1, and an exhaust pipe 13 is installed at the air outlet position of the test machine body 1. One end of the exhaust pipe 13 is connected to the monitoring pipe 14, and the other end of the exhaust pipe 13 is installed with an outlet pipe 131. 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 bottom 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.

[0027] Embodiment 2: The difference between Example 1 and this Example is that: Figure 2 , Figure 3 , Figure 6 and Fig.13 As shown, the drive assembly also includes a positioning ring 2, which is rotatably mounted on the outer edge of the monitoring tube 14, and the inner side wall of the positioning ring 2 is respectively connected to the guide slope 23 and the positioning slope 24, and the side wall of the positioning ring 2 is installed with a slide rail 221, and a slide seat 22 is slidably arranged on the slide rail 221, and the slide 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 with the side wall of the driven gear 21. A transmission shaft 213 is installed at the rotation center of the driving gear 211, and a driving motor 212 is installed at the end of the transmission shaft 213, and the driving motor 212 is welded to the test machine body 1. The design of this driving assembly can accurately control the rotation of the positioning ring 2 through the driving motor 212, and then accurately control the position of the guide slope 23 and the positioning slope 24, so as to realize the precise driving of the sealing assembly and the transposition monitoring assembly, and improve the controllability of the test process and the accuracy of the test results.

[0028] like Figure 4 and Figure 5 As shown, in a specific embodiment, a slide plate 32 is installed at both ends of the sealing plate 3, a guide rod 321 is installed inside the slide plate 32, a guide seat 323 is 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. The guide spring 322 can provide the sealing plate 3 with power to reset after completing the sealing action, so that the device structure is more reasonable, the operation is more convenient, and the use efficiency of the device is improved.

[0029] like Figure 4 , Figure 5 , Figure 7 , Figure 8 and Fig.10 As shown, further, 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 fitted together. Through the fitting of the guide wheel 313 and the guide slope 23, the rotation of the guide slope 23 can be converted into the linear motion of the sealing plate 3, so as to achieve precise sealing operation, and at the same time ensure the stability of the movement of the sealing plate 3, thereby improving the sealing effect.

[0030] Embodiment 3: The difference between Example 2 and this example is that: Figure 8 , Fig. 9 , Fig.10 and Fig.11 As 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, 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, and a positioning plate 412 with a limiting function is installed at the other end of the spiral slide rod 41, and a plurality of pairs of spoiler blocks 421 are installed on the surface of the spoiler plate 42, and a push rod 43 is installed on the collar 4, and the push rod 43 is slidably set in a sliding cavity 431 provided on the inner wall of the second channel 152, and a sealing cavity 433 is transversely provided at the center position of the sliding cavity 431, and a piston plate 432 is slidably set inside the sealing cavity 433, and the piston plate 432 is connected to the end of the push rod 43. Such a structural design allows the detection probe 16 to move stably along the spiral slide rod 41 under the drive of the collar 4. At the same time, the spoiler 42 and the spoiler block 421 can efficiently disturb the gas, and the cooperation of the piston plate 432 and the push rod 43 can achieve precise control of the position of the collar 4, thereby ensuring the accuracy and stability of the detection process.

[0031] like Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, in a specific embodiment, a push plate 44 is installed on the top of the piston plate 432, and the push plate 44 movably penetrates the notch 443 opened on the surface of the synchronization plate 311, and 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, and the position of the ball 445 and the positioning slope 24 are mutually adapted, and a limit rod 441 is inserted and arranged in the push plate 44, and both ends of the limit rod 441 are installed in the sliding cavity 431, and a limit spring 442 is sleeved on the limit rod 441, and 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. The limit spring 442 can quickly reset the push plate 44 after it completes the pushing action, so as to ensure the continuous and stable operation of the equipment and improve the test efficiency.

[0032] like Fig.12 As shown, further, the stirring assembly includes a stirring shaft 5, and the stirring shaft 5 is placed in the channel three 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 channel three 153, a stirring rod 51 is installed around the side wall of the stirring shaft 5, and a flow-around blade 53 is installed at the end of the stirring shaft 5. The exhaust gas impacts the flow-around blade 53 to drive the stirring shaft 5 to rotate, and then the exhaust gas is stirred by the stirring rod 51, without the need for an additional power source, the structure is simple and energy-saving and efficient, and can effectively simulate the exhaust gas under a complex flow state.

[0033] The present invention also discloses a testing method for a three-way catalytic high and low temperature anti-aging testing machine, the steps of which are as follows: Step 1: Equipment preparation, install the three-way catalytic converter into the test machine body 1; Step 2: Test environment simulation: simulated exhaust gas is introduced into the test machine body 1 through the air intake pipe 12, and the temperature control system of the test machine body 1 is used to simulate the high and low temperature environment of the actual operation of the car, so that the exhaust gas flows through the three-way catalytic converter under the simulated environment, simulating the real working condition, and starting the high and low temperature anti-aging test process of the three-way catalytic converter; Step 3: Initial data collection. When the exhaust gas flows into the monitoring tube 14, the detection probe 16 in the normally open channel 15 detects the exhaust gas just flowing in from the exhaust pipe 13 in real time, and obtains the composition, concentration, temperature and other parameters of the exhaust gas in the initial state, so as to provide basic comparative data for subsequent detection under different states. Step 3: Static gas detection, start the drive motor 212, drive the positioning ring 2 to rotate, and the guide slope 23 drives the sealing plate 3 to seal the channel 151. The detection probe 16 in the channel detects the static gas and analyzes the catalytic effect of the three-way catalytic converter under stable working conditions; Step 4: Static stirring and transposition detection, the guide slope 23 rotates, the positioning slope 24 pushes the ball 445, so that the collar 4 slides along the positioning slope 24 to change the monitoring position, and at the same time the detection probe 16 moves along the spiral slide bar 41 with different rotation directions, the spoiler 42 disturbs the gas at multiple angles, and the detection probe 16 obtains the catalytic performance data at different positions and gas mixing states; Step 5: non-static stirring detection, the exhaust gas impacts the flow blades 53 in the third channel 153, driving the stirring shaft 5 to stir the exhaust gas, and the detection probe 16 detects the non-static stirring gas to evaluate the performance of the three-way catalytic converter under complex airflow; Step 6: Result evaluation: Comprehensively evaluate the high and low temperature anti-aging performance of the three-way catalytic converter by integrating the detection data of each channel and the test environment parameters to obtain the test results.

[0034] The implementation principle of a three-way catalytic high and low temperature anti-aging tester and its testing method of the present invention is as follows: The operator can first put the three-way catalyst into the test machine body 1, and then input simulated exhaust gas into the interior through the intake pipe 12. Then the test machine body 1 uses its own temperature control system to simulate the high and low temperature environment of the actual operation of the car, and allows the exhaust gas to flow through the three-way catalytic converter under this environment to simulate the actual working conditions and perform an anti-aging test on the three-way catalytic converter (the specific testing principle of the above-mentioned test machine body is the existing technology, and its specific working principle will not be repeated here).

[0035] After the exhaust gas is discharged from the test machine body 1 and enters the monitoring tube 14, the monitoring tube 14 begins to play its detection function. The detection probe 16 in the normally open channel 15 and the channel 1 151, channel 2 152 and channel 3 153 surrounding its side wall detects the composition, concentration, temperature and other parameters of the flowing exhaust gas in real time, providing data for preliminary evaluation of the catalytic effect of the three-way catalytic converter under dynamic airflow (the detection probe 16 is a prior art, and its working principle is not repeated here).

[0036] The normally open channel 15 serves as the detection channel for the initial state, and the detection probe 16 therein detects the exhaust gas that has just flowed into the monitoring tube 14 from the exhaust pipe 13 in real time, obtains the composition, concentration, temperature and other parameters of the exhaust gas in the initial state, and provides basic comparison data for subsequent detections under different states.

[0037] When it is necessary to perform static detection on the gas in a specific channel, the drive assembly starts working. 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 rotating the drive gear 211, and the drive gear 211 and the driven gear 21 are meshed with each other, thereby driving the positioning ring 2 to rotate around 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, which plays a role of limiting. And because the guide slope 23 and the positioning slope 24 are connected to the inner wall of the positioning ring 2, they also rotate when the positioning ring 2 rotates.

[0038] When the guide slope 23 rotates, the sealing assembly starts to operate, and the guide wheel 313 on the sealing plate 3 slides along the outer edge of the guide slope 23, and then the guide wheel 313, the synchronous seat 312 and the synchronous plate 311 drive the sealing plate 3 connected to the vertical rod 31 to move toward the axis, and finally the channel 151 can be sealed. When the sealing plate 3 slides, the slide plate 32 on the side wall of the sealing plate 3 slides on the guide rod 321, and the guide spring 322 on the guide rod 321 is compressed synchronously, and the guide spring 322 is used to facilitate the subsequent resetting operation.

[0039] When the sealing assembly has completed its movement, the gas in channel one 151 and channel two 152 is in a static state. At this time, the detection probe 16 in channel one 151 detects the gas in a static state to obtain relevant data of the three-way catalytic converter in a static state of the gas after catalysis, so as to analyze its catalytic effect in a stable environment.

[0040] For the second channel 152, not only static detection can be achieved, but also the enclosed gas can be stirred and the detection position can be changed. After the sealing assembly moves, the guide wheel 313 slides along the arc outer wall of the guide slope 23, and the sealing plate 3 does not slide.

[0041] However, when the guide slope 23 corresponding to the second channel 152 rotates a certain angle, the positioning slope 24 on the guide slope 23 contacts the ball 445, and the ball 445 is pushed by the positioning slope 24, driving the push plate 44 to slide horizontally through the connecting rod 444, and the push plate 44 can also slide on the limit rod 441 and compress the limit spring 442, which is convenient for later reset through the limit spring 442. When the push plate 44 slides, the push plate 44 pushes the piston plate 432 to move in the sealing cavity 433, which has a sealing effect, and can also push the push rod 43 to move in the sliding cavity 431, so that the collar 4 slides along the positioning slope 24 to achieve the change of the monitoring position.

[0042] During the movement of the collar 4, the detection probe 16 slides on the guide rail 413 of the collar 4 due to its shell, and the collar 4 drives the detection probe 16 to move along the spiral slide bars 41 with different rotation directions, so that the detection probe 16 can detect the gas in the channel 2 152 from different angles and positions. It is particularly worth mentioning that, due to the provision of the spiral slide bars 41 with different rotation angles, when the detection probes 16 on both sides move along the spiral slide bars 41 with different rotation directions, the movement trajectories of the spoilers 42 on the side walls are different, and they do not rotate in one direction, which enables the spoilers 42 to disturb the enclosed gas from multiple angles, greatly improving the stirring effect on the gas, promoting uniform mixing of the gas, and simulating a more complex reaction environment.

[0043] At the same time, the spoiler 42 and the spoiler block 421 on the detection probe 16 disturb the enclosed gas during detection, promote uniform mixing of the gas, and simulate a more complex reaction environment. The detection probe 16 detects the gas in this state, and the acquired data can more comprehensively reflect the catalytic performance of the three-way catalytic converter at different positions and under different gas mixing conditions.

[0044] In channel three 153, the gas is not in a static state, but in a stirring state. When the exhaust gas flows into channel three 153, the stirring shaft 5 can rely on the impact force of the exhaust gas flow itself to drive the flow blades 53 to rotate, and then drive the stirring shaft 5 to rotate. The stirring rod 51 on the stirring shaft 5 stirs the exhaust gas to make its composition more uniform. The detection probe 16 in channel three 153 detects the gas in this non-static but stirring 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 of exhaust gas in actual automobile operation.

[0045] By monitoring different channels in the tube 14 to detect gases in different states such as initial state (normally open channel), static state (channel one), static stirring with variable detection position (channel two), and non-static stirring (channel three), this test machine can comprehensively and fully evaluate the performance of the three-way catalytic converter and provide 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 channel three (153).

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: 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) and the end of the push rod (43) are connected to each other.

8. A three-way catalytic high and low temperature anti-aging tester according to claim 7, characterized in that: 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).

9. 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).

10. A three-way catalytic high and low temperature anti-aging test method, characterized in that: A three-way catalytic high and low temperature anti-aging test machine applied to any one of claims 1 to 9, wherein the testing method of the three-way catalytic high and low temperature anti-aging test machine comprises the following steps: Step 1: Equipment preparation: install the three-way catalytic converter into the testing machine body (1); Step 2: Test environment simulation, introducing simulated exhaust gas into the test machine body (1) through the air intake pipe (12), using the temperature control system of the test machine body (1) to simulate the high and low temperature environment of the actual operation of the automobile, so that the exhaust gas flows through the three-way catalytic converter under the simulated environment, simulating the actual working condition, and starting the high and low temperature anti-aging test process of the three-way catalytic converter; Step 3: Initial data collection: when the exhaust gas flows into the monitoring tube (14), the detection probe (16) in the normally open channel (15) detects the exhaust gas just flowing in from the exhaust pipe (13) in real time, and obtains the composition, concentration, temperature and other parameters of the exhaust gas in the initial state, so as to provide basic comparative data for subsequent detection under different states; Step 3: Static gas detection, start the drive motor (212), drive the positioning ring (2) to rotate, and the guide slope (23) drives the sealing plate (3) to seal the channel 1 (151). The detection probe (16) in the channel detects the static gas and analyzes the catalytic effect of the three-way catalytic converter under stable working conditions; Step 4: static stirring and transposition detection, the guide slope (23) rotates, the positioning slope (24) pushes the ball (445), so that the ring (4) slides along the positioning slope (24) to change the monitoring position, and at the same time the detection probe (16) moves along the spiral slide bar (41) with different rotation directions, the spoiler (42) disturbs the gas at multiple angles, and the detection probe (16) obtains catalytic performance data at different positions and gas mixing states; Step 5: non-static stirring detection, the exhaust gas impacts the inner flow fan blade (53) of the channel 3 (153), driving the stirring shaft (5) to stir the exhaust gas, and the detection probe (16) detects the non-static stirring gas to evaluate the performance of the three-way catalytic converter under complex airflow; Step 6: Result evaluation: Comprehensively evaluate the high and low temperature anti-aging performance of the three-way catalytic converter by integrating the detection data of each channel and the test environment parameters to obtain the test results.

Images