A diesel engine oxidation catalytic converter

Abstract

This application relates to a diesel engine oxidation catalytic converter, belonging to the field of diesel engine exhaust gas purification technology. It includes a housing with an internal groove, an air inlet at the upper end, and an air outlet at the lower end. A mounting bracket is fixed to one side of the housing, and a through groove is formed on the front side. A detachable door is mounted on the front side of the housing via screws, and a detachable cover is mounted on the center of the detachable door via screws. A handle is fixed to the upper side of the detachable door. This application achieves a stable pressing effect by manually pulling the limiting bracket upwards, thereby improving the stability of the converter. Furthermore, the discharge of gas from the air outlet improves the conversion rate, thus enhancing the converter's working efficiency. It also achieves automatic cleaning, reducing dust accumulation on the catalyst surface and extending the catalyst's maintenance cycle, thereby improving the converter's overall performance.

Description

Technical Field

[0001] This invention relates to the field of diesel engine exhaust purification technology, specifically to a diesel engine oxidation catalytic converter. Background Technology

[0002] Diesel engines are widely used in transportation and construction machinery due to their high torque and fuel economy. However, their exhaust gases contain a large amount of harmful substances, such as particulate matter (PM), nitrogen oxides (NOx), hydrocarbons (HC), and carbon monoxide (CO). To meet increasingly stringent emission regulations, diesel engine exhaust aftertreatment technology has become a research hotspot. Currently, diesel engine oxidation catalytic converters (DOCs) are one of the mainstream technologies for reducing HC and CO emissions, converting harmful gases into harmless carbon dioxide and water through catalytic oxidation reactions.

[0003] In the actual operation of a diesel engine oxidation catalytic converter (DOC), the stability of the solid catalyst within the housing is a key factor determining its purification efficiency. Affected by the impact and fluctuations of exhaust gas flow, especially when engine operating conditions change frequently (such as acceleration and deceleration), the speed and pressure of the airflow fluctuate significantly, causing continuous disturbance to the solid catalyst. If the catalyst shifts, loosens, or even accumulates locally under this airflow, its original uniform distribution will be directly disrupted. On the one hand, this leads to a significant reduction in the contact area between the catalyst and the exhaust gas, causing some harmful gases to be emitted directly without sufficient catalytic reaction. On the other hand, catalyst movement can also cause uneven airflow distribution, creating localized "short circuits," where the exhaust gas velocity in the catalyst layer abnormally increases, preventing sufficient contact with the active components. This results in a significant decrease in the conversion efficiency of pollutants such as HC and CO, making it difficult to achieve the expected purification effect. More seriously, continuous catalyst movement can also cause mechanical wear, leading to the loss of active components. This not only further weakens the purification performance of the catalytic converter but also shortens its service life, ultimately resulting in insufficient stability of the converter. Therefore, it is necessary to invent a diesel engine oxidation catalytic converter to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a diesel engine oxidation catalytic converter to solve the problems mentioned in the background art.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a diesel engine oxidation catalytic converter, comprising a housing, a housing groove inside the housing, an air inlet at the upper end of the housing, an air outlet at the lower end of the housing, a mounting bracket fixed on one side of the housing, a through groove on the front side of the housing, a detachable door on the front side of the housing via screws, a detachable cover on the middle of the detachable door via screws, and a handle fixed on the upper side of the detachable door;

[0006] A stabilizing groove is provided on one side of the shell groove, a fixing frame is fixed on the lower side of the shell groove, a stabilizing hole is provided on one side of the fixing frame, a rotating groove is provided in the middle of the fixing frame, a rotating ring is rotatably connected to the inner wall of the rotating groove, a support frame is fixed in the middle of the rotating ring, a number of connecting rods are fixed at the upper end of the support frame, a fixing plate is fixed at the upper end of each connecting rod, a spring is fixed at the lower end of each fixing plate, and a limit frame is fixed at the lower end of two of the springs;

[0007] A connecting structure is provided on the lower side of the rotating ring, and a number of fan blades are provided on the connecting structure; the connecting structure can rotate with the number of fan blades in the circumferential direction of the rotating groove, so as to drive the support frame and the catalyst on it to rotate synchronously through the rotating ring.

[0008] Preferably, the connection structure includes a lower fixing frame, a stabilizing block fixed in the middle of the lower fixing frame, a fixing rod fixed in the middle of the stabilizing block, a support plate fixed at the lower end of the fixing rod, and several fan blades fixed on the side of the support plate.

[0009] Preferably, the upper end of the lower fixing frame is fixed to the lower side of the rotating ring, the middle part of the lower fixing frame is fixed to the four ends of the stabilizing block, the cross section of the stabilizing block is arranged in a cross shape, and the middle part of the stabilizing block is fixed to the upper end of the fixing rod.

[0010] Preferably, the lower end of the fixing rod is fixed to the middle of the upper side of the support plate, the cross-section of the support plate is circular, a number of fan blades are distributed in a ring, and the near ends of the number of fan blades are fixed to the side of the support plate.

[0011] Preferably, the outer end of the support frame is fixed to the inner wall of the rotating ring, the cross-section of the rotating ring is circular, the outer surface of the rotating ring is rotatably connected to the inner wall of the rotating groove, and the rotating groove is opened in the middle of the fixed frame.

[0012] Preferably, the lower ends of several connecting rods are fixed to the upper end of the support frame, and the upper ends of several connecting rods are fixed to the middle of the lower ends of several fixed discs, with each fixed disc having a circular cross-section.

[0013] Preferably, the upper end of each spring is fixed to the lower side of each fixed plate, the lower end of each spring is fixed to one end of each limiting frame, and the inner wall of one end of each limiting frame is slidably connected to the outer surface of each connecting rod, and a plurality of limiting frames are arranged in a spaced-out manner.

[0014] Preferably, an upper frame is fixed on the upper side of the rotating ring, a gear ring is fixed on the outer side of the upper frame, the gear ring is meshed with a driven gear, a rotating frame is fixed in the middle of the driven gear, a driving bevel gear is fixed at the upper end of the rotating frame, the driving bevel gear is meshed with a driven bevel gear, a stabilizing frame is fixed in the middle of the driven bevel gear, and a brush holder is fixed on one side of the stabilizing frame.

[0015] Preferably, the lower end of the upper fixing frame is fixed to the upper side of the rotating ring, the outer side of the upper fixing frame is fixed to the inner wall of the gear ring, the gear ring is meshed with the driven gear, the middle part of the driven gear is fixed to the middle part of the rotating frame, the outer surface of the rotating frame is rotatably connected to the inner wall of the stabilizing hole, and the vertical section of the rotating frame is T-shaped.

[0016] Preferably, the middle part of the driving bevel gear is fixed to the upper end of the rotating frame, the driving bevel gear is meshed with the driven bevel gear, the middle part of the driven bevel gear is fixed to one side of the stabilizing frame, the outer surface of the stabilizing frame is rotatably connected to the inner wall of the stabilizing groove, the cross section of the stabilizing frame is T-shaped, the middle part of the brush holder is fixed to one side of the stabilizing frame, and the brush bristles of the brush holder are attached to the outer surface of the limiting frame.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) When the limiting frame is pulled upward by human force, the support frame, connecting rod, fixed plate, spring and limiting frame work together to achieve the effect of pressing and stabilizing, effectively avoiding the position displacement of the catalyst due to the change of the accumulation form caused by physical loss, preventing it from affecting the purification reaction efficiency, and finally achieving the purpose of improving the stability of the converter.

[0019] (2) When the gas is discharged from the outlet, the lower frame, stabilizing block, fixing rod, support plate, fan blade, fixing frame, rotating groove and rotating ring work together to achieve the effect of improving the conversion rate, thereby improving the conversion rate of HC and CO, and thus improving the working efficiency of the converter.

[0020] (3) When the gas is discharged from the outlet, the fixed frame, rotating groove, rotating ring, stabilizing groove, stabilizing hole, upper fixed frame, gear ring, driven gear, rotating frame, driving bevel gear, driven bevel gear, stabilizing frame and brush frame work together to achieve automatic cleaning effect, which can reduce the dust accumulation on the catalyst surface, extend the catalyst maintenance cycle, and thus improve the performance of the converter. Attached Figure Description

[0021] Figure 1 This is an overall structural diagram of the present invention;

[0022] Figure 2 This is a front cross-sectional view of the housing of the present invention;

[0023] Figure 3 This is a side cross-sectional view of the housing of the present invention;

[0024] Figure 4 This is a partial structural cross-sectional view of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged view of the structure of section A in the middle;

[0026] Figure 6 This is a schematic diagram of the support frame structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the lower fixing frame structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the upper fixing frame structure of the present invention;

[0029] Figure 9 This is a partial structural diagram of the present invention;

[0030] Figure 10 This is a schematic diagram of the fixing frame structure of the present invention.

[0031] In the diagram: 1. Shell; 2. Shell groove; 3. Air inlet; 4. Air outlet; 5. Mounting bracket; 6. Through groove; 7. Sealing door; 8. Sealing cover; 9. Handle; 10. Stabilizing groove; 11. Fixing bracket; 12. Stabilizing hole; 13. Rotating groove; 14. Rotating ring; 15. Support bracket; 16. Connecting rod; 17. Fixing plate; 18. Spring; 19. Limiting bracket; 20. Lower fixing bracket; 21. Stabilizing block; 22. Fixing rod; 23. Supporting plate; 24. Fan blade; 25. Upper fixing bracket; 26. Gear ring; 27. Driven gear; 28. Rotating bracket; 29. ​​Driving bevel gear; 30. Driven bevel gear; 31. Stabilizing bracket; 32. Brush holder. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] This embodiment provides a diesel engine oxidation catalytic converter;

[0035] Please see Figure 1 - Figure 10As shown, the device includes a housing 1, with a housing groove 2 inside the housing 1, an air inlet 3 at the upper end of the housing 1, an air outlet 4 at the lower end of the housing 1, a mounting bracket 5 fixed to one side of the housing 1, a through groove 6 on the front side of the housing 1, a detachable door 7 on the front side of the housing 1 via screws, and a detachable cover 8 on the middle of the detachable door 7 via screws. The design of the detachable door 7 and the detachable cover 8 allows personnel to easily open the housing 1 for maintenance and replacement of the catalyst. A handle 9 is fixed to the upper side of the detachable door 7. A stabilizing groove 10 is formed on one side of the housing groove 2, a fixing bracket 11 is fixed to the lower side of the housing groove 2, a stabilizing hole 12 is formed on one side of the fixing bracket 11, and a stabilizing hole 12 is formed in the middle of the fixing bracket 11. A rotating groove 13 is provided, and a rotating ring 14 is rotatably connected to the inner wall of the rotating groove 13. A support frame 15 is fixed in the middle of the rotating ring 14. Several connecting rods 16 are fixed to the upper end of the support frame 15. A fixing plate 17 is fixed to the upper end of each connecting rod 16, and a spring 18 is fixed to the lower end of each fixing plate 17. Two of the springs 18 are fixed to the lower end of a limiting frame 19. Through the elastic force of the springs 18, a continuous and gentle driving force can be formed, which is transmitted to the catalyst surface through the limiting frame 19. In this process, the limiting frame 19 and the support frame 15 form a clever cooperation. The support frame 15 provides a stable bottom support for the catalyst, ensuring that it will not be displaced due to its own weight or slight external force. The limiting frame 19, under the action of the spring 18, flexibly compresses the catalyst from above. This flexible compression is not a rigid, forced fixation, but rather adapts to minor morphological changes that may occur in the catalyst through the elastic deformation of the spring 18. When the catalyst experiences slight physical wear due to long-term use, such as a slight reduction in overall thickness caused by particle wear, the spring 18 will promptly release some of its elastic force, pushing the limiting frame 19 downward accordingly, maintaining effective compression of the catalyst at all times, avoiding gaps that could affect stability. Simultaneously, this flexible compression method does not damage the catalyst structure, preventing catalyst particle breakage or active component detachment, thus maximizing the preservation of catalyst. This structure not only protects the integrity of the catalyst, but also buffers the impact and fluctuations of the exhaust gas flow. When the engine operating conditions change frequently and the airflow speed and pressure fluctuate significantly, the elastic force of the spring 18 will form a dynamic buffer protection for the catalyst through the limiting frame 19, reducing the disturbance of the catalyst by the airflow impact and preventing the catalyst from shifting, loosening or even locally accumulating in the housing 1. In this way, the elastic force of the spring 18, through the cooperation of the limiting frame 19 and the support frame 15, achieves flexible compression of the catalyst, maintaining the stability of the catalyst in the housing 1 from multiple aspects, and providing a reliable guarantee for its full contact and reaction with the exhaust gas.

[0036] Please refer to it again. Figure 1 - Figure 10As shown, the outer end of the support frame 15 is fixed to the inner wall of the rotating ring 14. The cross-section of the rotating ring 14 is circular. The outer surface of the rotating ring 14 is rotatably connected to the inner wall of the rotating groove 13. The rotating groove 13 is opened in the middle of the fixed frame 11. The lower ends of several connecting rods 16 are fixed to the upper end of the support frame 15. The upper ends of several connecting rods 16 are fixed to the middle of the lower end of several fixed plates 17. The cross-section of each fixed plate 17 is circular. The upper end of each spring 18 is fixed to the lower side of each fixed plate 17. The lower end of each spring 18 is fixed to one end of each limiting frame 19. The inner wall of one end of each limiting frame 19 is slidably connected to the outer surface of each connecting rod 16. Several limiting frames 19 are arranged at intervals.

[0037] The specific implementation process is as follows: When the limiting frame 19 is pulled upwards manually, it moves upwards synchronously under the stable support of the connected rod 16. During the upward movement, the limiting frame 19 compresses the spring 18 fixed at its upper end, and the spring 18 contracts under the support of the fixed plate 17 fixed at the top of the connecting rod 16. At this time, the limiting frame 19 obtains a movable compression space; in this state, the catalyst can be placed stably between the limiting frame 19 and the support frame 15. After the external force is released, the compressed spring 18 releases its elastic potential energy, causing the limiting frame 19 to flexibly press against the catalyst surface. Subsequently, the exhaust gas enters the interior of the shell 1 through the air inlet 3, reacts fully with the catalyst, and is then discharged through the air outlet 4.

[0038] By utilizing the contact action of the limiting frame 19 and the support frame 15 at both ends of the catalyst, the installation stability of the catalyst on the support frame 15 can be effectively improved, significantly reducing catalyst displacement caused by airflow impact and ensuring that the catalyst remains uniformly distributed on the support frame 15. It is worth noting that with long-term operation, the catalyst may experience physical losses such as particle wear and fragmentation due to mechanical actions such as airflow impact and vibration, leading to a gradual decrease in the overall core height. At this time, the spring 18 will use its elasticity to drive the limiting frame 19 to move downwards synchronously, ensuring that the limiting frame 19 maintains a stable contact force with the catalyst through sliding, thereby achieving a stable pressing effect. This effectively prevents the catalyst from shifting position due to changes in its stacking morphology caused by physical losses, preventing it from affecting the purification reaction efficiency and ultimately improving the stability of the converter.

[0039] Example 2

[0040] During the reaction between exhaust gas and catalyst, if the contact angle between their surfaces remains fixed for a long period, two types of problems are likely to occur: first, local areas are continuously subjected to strong airflow, leading to accelerated catalyst depletion; second, some areas become reaction blind zones due to dead airflow, resulting in incomplete pollutant conversion. These two problems together lead to a low overall catalyst conversion rate. Therefore, it is necessary to achieve automatic adjustment of the contact angle between exhaust gas and catalyst surfaces through structural design to improve the catalyst's conversion efficiency for pollutants such as HC and CO.

[0041] Please see Figure 1 - Figure 10 As shown, a conversion rate improvement function has been added based on Example 1;

[0042] Please refer to it again. Figure 1 - Figure 10 As shown, a connecting structure is provided on the lower side of the rotating ring 14. The connecting structure includes a lower fixing frame 20, a stabilizing block 21 fixed in the middle of the lower fixing frame 20, a fixing rod 22 fixed in the middle of the stabilizing block 21, a support plate 23 fixed at the lower end of the fixing rod 22, and several fan blades 24 fixed on the side of the support plate 23. The upper end of the lower fixing frame 20 is fixed to the lower side of the rotating ring 14, and the middle of the lower fixing frame 20 is fixed to the four ends of the stabilizing block 21. The cross-section of the stabilizing block 21 is cross-shaped, and the middle of the stabilizing block 21 is fixed to the upper end of the fixing rod 22. The lower end of component 22 is fixed to the upper middle part of support plate 23. The cross-section of support plate 23 is circular, and several fan blades 24 are arranged in a ring. The near ends of several fan blades 24 are fixed to the side of support plate 23. Since the inside of the catalyst consists of densely distributed narrow channels, when air flows through these channels, a significant septum effect will occur due to the limited space. Under this effect, the air velocity will increase significantly along the channel axis, forming a high-speed airflow. According to Bernoulli's principle, as the fluid velocity increases, its pressure will increase accordingly. The catalyst reduces pressure, creating a high-speed, low-pressure airflow. When this high-speed airflow, accelerated by the catalyst's internal pores, flows out, it interacts with the surface of the fan blade 24. On one hand, the high-speed airflow directly impacts the fan blade 24, causing it to rotate. On the other hand, a pressure difference is created on both sides of the blade due to the airflow velocity difference; the pressure on the front side is relatively high, while the pressure on the back side is lower due to the acceleration of the airflow. This pressure difference further generates additional thrust, which, together with the direct impact force, drives the fan blade 24 to rotate continuously. It is worth noting that the narrow structure of the catalyst's internal pores not only ensures the acceleration effect of the airflow, but its uniformly distributed channels also maintain a certain stability in the outflowing airflow, avoiding rotational vibration caused by uneven force on the fan blade 24 due to airflow turbulence. This power transmission method, based on the septum effect and Bernoulli's principle, does not require additional energy to drive the fan blade 24. It directly utilizes the energy of the exhaust gas flow to achieve autonomous rotation, providing stable power for the subsequent transmission mechanism. This demonstrates the efficient combination of structural design and fluid mechanics principles.

[0043] The specific implementation process is as follows: When gas is discharged from the outlet 4, it compresses several fan blades 24, causing them to generate rotational power. The rotating fan blades 24 drive the support disks 23 fixed at their adjacent ends to rotate, and the rotating support disks 23 drive the fixed rods 22 fixed in the middle to rotate synchronously. The fixed rods 22 then drive the stabilizing block 21 fixed at the upper end to rotate, and the stabilizing block 21 in turn drives the lower fixed frame 20 fixed at four ends to rotate. The rotating lower fixed frame 20 drives the rotating ring 14 fixed at the upper end to rotate stably under the limiting action of the inner wall of the rotating groove 13 opened in the middle of the fixed frame 11. The stably rotating rotating ring 14 then drives the catalyst fixed on the support frame 15 fixed in the middle and fixed by the limiting frame 19 to rotate.

[0044] When the catalyst rotates, the contact angle between the exhaust gas and the catalyst surface changes continuously. This can effectively prevent the catalyst from being worn out too quickly in local areas due to excessive airflow scouring, or the reaction from insufficient reaction due to dead airflow, thereby improving the conversion rate and increasing the conversion rates of HC and CO, thus improving the working efficiency of the converter.

[0045] Example 3

[0046] When exhaust gas first enters the catalyst, the accumulated ash easily adheres to its surface. This ash can clog the air intake passages, leading to a decrease in reaction efficiency. Currently, regular maintenance and cleaning of the catalyst by staff is required, which not only increases operating costs but may also affect converter performance if maintenance is not timely. Therefore, automatic cleaning of the catalyst surface is essential. This can promptly remove ash, clear the air intake path, reduce the frequency of manual maintenance, and thus effectively improve the continuous performance of the converter.

[0047] Please see Figure 1 - Figure 10 As shown, an automatic cleaning function has been added based on Embodiment 1;

[0048] Please refer to it again. Figure 1 - Figure 10As shown, an upper fixing frame 25 is fixed to the upper side of the rotating ring 14, and a gear ring 26 is fixed to the outer side of the upper fixing frame 25. The gear ring 26 is meshed with a driven gear 27. A rotating frame 28 is fixed to the middle of the driven gear 27. A driving bevel gear 29 is fixed to the upper end of the rotating frame 28. The driving bevel gear 29 is meshed with a driven bevel gear 30. A stabilizing frame 31 is fixed to the middle of the driven bevel gear 30. A brush holder 32 is fixed to one side of the stabilizing frame 31. The lower end of the upper fixing frame 25 is fixed to the upper side of the rotating ring 14, and the outer side of the upper fixing frame 25 is fixed to the inner wall of the gear ring 26. The gear ring 26 meshes with the driven gear 27. The driven gear 27 is fixed in the middle of the rotating frame 28. The outer surface of the rotating frame 28 is rotatably connected to the inner wall of the stabilizing hole 12. The vertical section of the rotating frame 28 is T-shaped. The driving bevel gear 29 is fixed in the middle of the upper end of the rotating frame 28. The driving bevel gear 29 meshes with the driven bevel gear 30. The middle of the driven bevel gear 30 is fixed to one side of the stabilizing frame 31. The outer surface of the stabilizing frame 31 is rotatably connected to the inner wall of the stabilizing groove 10. The cross section of the stabilizing frame 31 is T-shaped. The middle of the brush holder 32 is fixed to one side of the stabilizing frame 31. The bristles of the brush holder 32 are attached to the outer surface of the limiting frame 19.

[0049] The specific implementation process is as follows: When gas is discharged from the outlet 4, it compresses several fan blades 24, causing them to generate rotational power. This power is then transmitted through the support plate 23 and fixed rod 22 connected to the fan blades 24, and via the stabilizing block 21 and lower fixed frame 20, drives the rotating ring 14 to rotate. The rotating ring 14 drives the upper fixed frame 25 to rotate, which in turn drives the outer fixed gear ring 26 to rotate synchronously. The rotating gear ring 26 drives the meshing driven gear 27 to rotate, which in turn drives the central fixed rotating frame 28 to rotate. The rotating frame 28 achieves stable rotation under the constraint of the stabilizing hole 12 on one side of the fixed frame 11. The stable rotating frame 28 drives the upper fixed driving bevel gear 29 to rotate, which in turn drives the meshing driven bevel gear 30 to rotate. The driven bevel gear 30 then drives the central fixed stabilizing frame 31 to rotate under the constraint of the stabilizing groove 10 on one side of the shell groove 2. The stable rotating frame 31 drives the brush frame 32 fixed on one side to rotate. The rotating brush frame 32 sweeps and cleans the catalyst air inlet surface fixed between the support frame 15 and the limit frame 19, achieving an automatic cleaning effect. This reduces dust accumulation on the catalyst surface, extends the catalyst maintenance cycle, and thus improves the performance of the converter.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A diesel engine oxidation catalytic converter, comprising a housing (1), characterized in that: The shell (1) has a shell groove (2) inside, an air inlet (3) is provided at the upper end of the shell (1), an air outlet (4) is provided at the lower end of the shell (1), a mounting bracket (5) is fixed on one side of the shell (1), a through groove (6) is provided on the front side of the shell (1), a closed door (7) is detachably installed on the front side of the shell (1) by screws, a closed cover (8) is detachably installed in the middle of the closed door (7) by screws, and a handle (9) is fixed on the upper side of the closed door (7). A stabilizing groove (10) is provided on one side of the shell groove (2), a fixing frame (11) is fixed on the lower side of the shell groove (2), a stabilizing hole (12) is provided on one side of the fixing frame (11), a rotating groove (13) is provided in the middle of the fixing frame (11), a rotating ring (14) is rotatably connected to the inner wall of the rotating groove (13), a support frame (15) is fixed in the middle of the rotating ring (14), a number of connecting rods (16) are fixed at the upper end of the support frame (15), a fixing plate (17) is fixed at the upper end of each connecting rod (16), a spring (18) is fixed at the lower end of each fixing plate (17), and a limit frame (19) is fixed at the lower end of two springs (18). A connecting structure is provided on the lower side of the rotating ring (14), and several fan blades (24) are provided on the connecting structure; the connecting structure can rotate in the circumferential direction of the rotating groove (13) with several fan blades (24) so ​​as to drive the support frame (15) and the catalyst on it to rotate synchronously through the rotating ring (14); The connection structure includes a lower frame (20), a stabilizing block (21) is fixed in the middle of the lower frame (20), a fixing rod (22) is fixed in the middle of the stabilizing block (21), a support plate (23) is fixed at the lower end of the fixing rod (22), and several fan blades (24) are fixed on the side of the support plate (23). The outer end of the support frame (15) is fixed to the inner wall of the rotating ring (14). The cross section of the rotating ring (14) is circular. The outer surface of the rotating ring (14) is rotatably connected to the inner wall of the rotating groove (13). The rotating groove (13) is opened in the middle of the fixed frame (11). The upper end of each spring (18) is fixed to the lower side of each fixed plate (17), the lower end of each spring (18) is fixed to one end of each limiting frame (19), and the inner wall of one end of each limiting frame (19) is slidably connected to the outer surface of each connecting rod (16). Several limiting frames (19) are arranged in a spaced-out manner. A top frame (25) is fixed on the upper side of the rotating ring (14). A gear ring (26) is fixed on the outer side of the top frame (25). A driven gear (27) is meshed with the gear ring (26). A rotating frame (28) is fixed in the middle of the driven gear (27). A driving bevel gear (29) is fixed at the upper end of the rotating frame (28). A driven bevel gear (30) is meshed with the driving bevel gear (29). A stabilizing frame (31) is fixed in the middle of the driven bevel gear (30). A brush holder (32) is fixed on one side of the stabilizing frame (31). The lower end of the upper frame (25) is fixed to the upper side of the rotating ring (14), and the outer side of the upper frame (25) is fixed to the inner wall of the gear ring (26). The gear ring (26) meshes with the driven gear (27). The middle part of the driven gear (27) is fixed to the middle part of the rotating frame (28). The outer surface of the rotating frame (28) is rotatably connected to the inner wall of the stabilizing hole (12). The vertical section of the rotating frame (28) is T-shaped.

2. The diesel engine oxidation catalytic converter according to claim 1, characterized in that: The upper end of the lower fixing frame (20) is fixed to the lower side of the rotating ring (14), and the middle part of the lower fixing frame (20) is fixed to the four ends of the stabilizing block (21). The cross section of the stabilizing block (21) is set in a cross shape, and the middle part of the stabilizing block (21) is fixed to the upper end of the fixing rod (22).

3. The diesel engine oxidation catalytic converter according to claim 1, characterized in that: The lower end of the fixing rod (22) is fixed to the middle of the upper side of the support plate (23). The cross-section of the support plate (23) is circular. Several fan blades (24) are arranged in a ring. The near ends of several fan blades (24) are fixed to the side of the support plate (23).

4. A diesel engine oxidation catalytic converter according to claim 1, characterized in that: The lower ends of several connecting rods (16) are fixed to the upper end of the support frame (15), and the upper ends of several connecting rods (16) are fixed to the middle of the lower end of several fixed discs (17). Each fixed disc (17) has a circular cross-section.

5. A diesel engine oxidation catalytic converter according to claim 1, characterized in that: The active bevel gear (29) is fixed at the upper end of the rotating frame (28) in the middle. The active bevel gear (29) is meshed with the driven bevel gear (30). The driven bevel gear (30) is fixed at the middle on one side of the stabilizer (31). The outer surface of the stabilizer (31) is rotatably connected to the inner wall of the stabilizer groove (10). The cross section of the stabilizer (31) is T-shaped. The brush holder (32) is fixed at the middle on one side of the stabilizer (31). The bristles of the brush holder (32) are attached to the outer surface of the limiting frame (19).

Images