An EGR-based exhaust gas treatment device

Abstract

The present invention relates to the technical field of waste treatment equipment, and specifically discloses an exhaust gas treatment device based on EGR, which includes a connecting pipe; the connecting pipe includes a connecting part and a filtering part; a primary dust cleaning component is connected to the connecting part; a secondary dust cleaning component is connected to the filtering part; a gas mixing component is connected to the secondary dust cleaning component; a dust accumulation component is connected to the secondary dust cleaning component; when the present invention is in use, the larger solid particles are filtered by the primary dust cleaning component, and the exhaust gas after filtration is further filtered by the secondary dust cleaning component. At the same time of filtration, the filtered solid particles are cleaned into the dust accumulation component for storage, which is convenient for cleaning, improves the cleanliness of the exhaust gas, and the exhaust gas after secondary filtration is mixed with external air through the gas mixing component and then re-enters the cylinder interior to improve the mixing degree.

Description

Technical Field

[0001] The present invention relates to the technical field of waste treatment equipment, and particularly to an exhaust gas treatment device based on EGR. Background Art

[0002] Automobile exhaust is the waste gas generated when an automobile is in use, containing hundreds of different compounds, and the pollutants therein include solid suspended particles, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, lead, sulfur oxides, etc.; while directly endangering human health, the exhaust gas will also have a profound impact on the environment in which humans live. In order to reduce the content of nitrogen oxides in automobile exhaust, the EGR technology is usually adopted to recycle the exhaust gas and cool the temperature in the cylinder.

[0003] EGR, namely the abbreviation of Exhaust Gas Recirculation; Exhaust Gas Recirculation means that a part of the exhaust gas discharged from the engine is sent back to the intake manifold through the EGR valve and enters the cylinder again together with the fresh mixture; since the exhaust gas contains a large amount of polyatomic gases such as CO2, and gases such as CO2 cannot burn but absorb a large amount of heat due to their high specific heat capacity, the maximum combustion temperature of the mixture in the cylinder is reduced, thereby reducing the generation amount of nitrogen oxides; however, during the process of the exhaust gas entering the cylinder, the content of solid particles inside the cylinder will also increase. With the accumulation of solid particles, it is easy to cause blockage at the outlet of the cylinder, affecting the operation of the cylinder. For this reason, we propose an exhaust gas treatment device based on EGR. Summary of the Invention

[0004] The purpose of the present invention is to provide an exhaust gas treatment device based on EGR to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An exhaust gas treatment device based on EGR, comprising: a connecting pipe;

[0006] The connecting pipe includes a connecting part and a filtering part;

[0007] A primary dust cleaning component, which is connected to the connecting part and preliminarily filters the solid particles in the exhaust gas;

[0008] A secondary dust cleaning component, which is connected to the filtering part, filters the solid particles in the exhaust gas, and cleans the attached solid particles;

[0009] A gas mixing component, which is connected to the secondary dust cleaning component and is used for mixing the exhaust gas and external air;

[0010] A dust accumulation component, which is connected to the secondary dust cleaning component and is used for collecting the solid particles.

[0011] Preferably, the first-stage cleaning component includes a slot opened in the connecting part, one side of the slot is connected to the outside and the other side is closed, a filter plate that cooperates with the exhaust gas inside the connecting part is slidably connected inside the slot, and elastic clamping strips that clamp the side walls of the filter plate are symmetrically fixedly connected on both sides of the filter plate on the connecting part.

[0012] Preferably, the secondary cleaning component includes a cylindrical filter cover fixedly connected to the outer periphery of the filter part, a filter hole is provided on the side of the filter cover away from the ground, annular grooves are provided on both sides of the inside of the filter part, an inner annular plate is rotatably connected inside the annular groove, a cross-shaped support frame is fixedly connected to the inner wall of the inner annular plate, annular grooves are also provided on both sides of the outside of the filter part at positions corresponding to the internal annular grooves, outer annular plates are rotatably connected in the annular grooves on the outsides of both sides, mounting plates are fixedly connected on the inner and outer annular plates on both sides, brush shafts are fixedly connected between the mounting plates corresponding to the inner annular plates on both sides and between the mounting plates corresponding to the outer annular plates on both sides, a brush cylinder is fixedly connected to the brush shaft, and the secondary cleaning component also includes a driving component, which drives the inner and outer annular plates to rotate.

[0013] Preferably, the driving assembly includes a mounting shell fixedly connected to one side of the filter cover, a small motor fixedly connected inside the mounting shell, a driving shaft fixedly connected to the output end of the small motor, a gear 1 fixedly connected to the driving shaft, a ring gear 2 meshing with gear 1 fixedly connected to the outer ring plate on the side away from the connecting part, a rotating shaft fixedly connected to the center of the support frame on the side away from the connecting part, and a pulley assembly for transmission connection between the rotating shaft and the driving shaft.

[0014] Preferably, the gas mixing assembly includes a mixing box fixedly connected to the side of the filter cover away from the ground, the mixing box is connected to the filter hole, an air inlet pipe is connected to one side of the mixing direction, and an air outlet pipe is fixedly connected to the side of the mixing box away from the connection part.

[0015] Preferably, the dust collection component includes a dust collection hole opened at the bottom of the filter cover along the length direction of the filter cover, and sliding seats along the length direction of the filter cover are symmetrically fixedly connected on both sides of the dust collection hole outside the filter cover, and sliding grooves are opened on the side walls of the sliding seats on both sides that are away from each other along their length direction, and a dust collection box opening toward one side of the dust collection hole is slidably connected inside the sliding groove, and a locking assembly that contacts the end face of the dust collection box is provided at one end of the sliding seats on both sides close to the connecting part.

[0016] Preferably, the locking assembly includes a fixed seat fixed on one side of the sliding seats on both sides close to the connecting part, a rotating shaft is rotatably connected between the fixed seats on both sides, a pressure plate that contacts the end face of the dust box is fixedly connected to the rotating shaft, and a torsion spring is fixedly connected between the pressure plate and the fixed seat.

[0017] Preferably, the cross-section of the clamping strip is C-shaped, and a portion of the clamping strip extends to the outside of the connecting portion.

[0018] Preferably, the intake pipe is located on the side of the mixing box away from the ground and is of an inclined structure.

[0019] Preferably, a number of spoiler plates are fixedly connected inside the mixing box.

[0020] The present invention has at least the following beneficial effects:

[0021] 1. When the present invention is in use, the exhaust gas at the rear of the vehicle enters the inside of the connecting pipe through the EGR valve, and then the larger solid particles are filtered by the primary dust cleaning component. After filtering, the exhaust gas is further filtered by the secondary dust cleaning component. At the same time of filtering, the filtered solid particles are cleaned into the dust accumulation component for storage, which is convenient for cleaning, improves the cleanliness of the exhaust gas, and avoids blockage at the air inlet and outlet of the oil cylinder due to excessive solid particles. After being filtered twice, the exhaust gas is mixed with the external air through the gas mixing component and then re-enters the cylinder, improving the mixing degree and facilitating use.

[0022] 2. In the present invention, the intake pipe is located on the side of the mixing box away from the ground and is of an inclined structure; when in use, since the exhaust gas has a certain temperature and moves upward, and the temperature of the air is lower than that of the exhaust gas and moves downward, arranging the intake pipe at the top of the mixing box can promote the mixing between the air and the exhaust gas, and the inclined design of the intake pipe can reduce the influence of the inflow of air on the exhaust gas flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is one of the overall three-dimensional structure diagrams of the present invention;

[0024] Figure 2 is the second of the overall three-dimensional structure diagrams of the present invention;

[0025] Figure 3 is one of the front view sectional three-dimensional structure diagrams of the present invention;

[0026] Figure 4 is one of the front view sectional three-dimensional structure diagrams of the present invention;

[0027] Figure 5 is the third of the front view sectional three-dimensional structure diagrams of the present invention;

[0028] Figure 6 is the fourth of the front view sectional three-dimensional structure diagrams of the present invention;

[0029] Figure 7 is one of the side view sectional three-dimensional structure diagrams of the present invention;

[0030] Figure 8 is the second of the side view sectional three-dimensional structure diagrams of the present invention;

[0031] Figure 9This is a schematic diagram of the front view plane structure of the present invention.

[0032] In the figure: 1 - connecting pipe; 11 - connecting part; 12 - filtering part; 2 - primary dust cleaning component; 21 - clamping groove; 22 - filter plate; 23 - clamping strip; 3 - secondary dust cleaning component; 31 - filter cover; 32 - annular groove; 33 - inner annular plate; 34 - support frame; 35 - outer annular plate; 36 - mounting plate; 37 - brush shaft; 38 - brush barrel; 39 - drive component; 391 - mounting shell; 392 - small motor; 393 - drive shaft; 394 - gear one; 395 - rotating shaft; 396 - pulley assembly; 397 - gear two; 301 - filtering hole; 4 - gas mixing component; 41 - mixing box; 42 - intake pipe; 44 - outlet pipe; 5 - dust accumulation component; 51 - dust falling hole; 52 - sliding seat; 53 - sliding groove; 54 - dust accumulation box; 55 - engaging component; 551 - fixed seat; 552 - rotating shaft; 553 - torsion spring; 554 - pressing plate; 6 - scraping plate; 7 - flow disturbing plate. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1-9 , the present invention provides a technical solution: Embodiment 1, an exhaust gas treatment device based on EGR, including: a connecting pipe 1;

[0035] The connecting pipe 1 includes a connecting part 11 and a filtering part 12. A number of holes are provided on the filtering part 12. The connecting part 11 is connected to the EGR valve, where EGR is the exhaust gas recirculation system;

[0036] The primary dust cleaning component 2 is connected to the connecting part 11 to preliminarily filter solid particles in the tail gas;

[0037] The secondary dust cleaning component 3 is connected to the filtering part 12. The secondary dust cleaning component 3 filters solid particles in the tail gas and cleans the attached solid particles;

[0038] The gas mixing component 4 is connected to the secondary dust cleaning component 3 and is used to mix the tail gas and external air;

[0039] The dust accumulation component 5 is connected to the secondary dust cleaning component 3 and is used to collect solid particles;

[0040] During use, the exhaust gas at the rear of the vehicle enters the interior of the connecting pipe 1 through the EGR valve, and then the larger solid particles are filtered by the primary dust cleaning assembly 2. The exhaust gas after filtration is further filtered by the secondary dust cleaning assembly 3. During the filtration process, the filtered solid particles are cleaned into the dust accumulation assembly 5 for storage, which is convenient for cleaning, improves the cleanliness of the exhaust gas, and avoids blockage at the air inlet and outlet of the oil cylinder due to a large number of solid particles. The exhaust gas after secondary filtration is mixed with external air through the gas mixing assembly 4 and then re-enters the cylinder interior to improve the mixing degree and facilitate use.

[0041] The primary dust cleaning assembly 2 includes a card slot 21 opened in the connecting portion 11. One side of the card slot 21 is communicated with the outside and the other side is closed. Specifically, the side of the card slot 21 away from the ground is communicated with the outside, and the side close to the ground is a closed structure. A filter plate 22 that mates with the tail gas inside the connecting portion 11 is slidably connected inside the card slot 21. On both sides of the filter plate 22 on the connecting portion 11, elastic clamping strips 23 that clamp the side wall of the filter plate 22 are symmetrically and fixedly connected; during use, in the initial state, the filter plate 22 is kept stable under the clamping of the clamping strips 23 on both sides. When the filter plate 22 needs to be cleaned, the clamping strips 23 on both sides are pulled outwards, and then the filter plate 22 can be taken out. The solid particles after filtration can be manually cleaned out from the port close to the connecting portion 11.

[0042] The secondary dust cleaning component 3 includes a cylindrical filter cover 31 fixedly connected to the outer periphery of the filtering part 12. A filter hole 301 is provided on the side of the filter cover 31 away from the ground. Annular grooves 32 are respectively provided on both sides inside the filtering part 12, specifically on both sides along the length direction of the filtering part 12. An inner annular plate 33 is rotatably connected inside the annular groove 32. A cross-shaped support frame 34 is fixedly connected to the inner wall of the inner annular plate 33. Annular grooves 32 are also respectively provided at positions corresponding to the internal annular grooves 32 on both sides outside the filtering part 12. Outer annular plates 35 are rotatably connected inside the annular grooves 32 on both sides. Mounting plates 36 are fixedly connected to both the inner annular plates 33 on both sides and the outer annular plates 35 on both sides. Brush shafts 37 are fixedly connected between the mounting plates 36 corresponding to the inner annular plates 33 on both sides and between the mounting plates 36 corresponding to the outer annular plates 35 on both sides. Brush cylinders 38 are fixedly connected to the brush shafts 37. The secondary dust cleaning component 3 further includes a driving component 39. The driving component 39 drives the inner annular plate 33 and the outer annular plate 35 to rotate. The driving component 39 includes a mounting shell 391 fixedly connected to one side of the filter cover 31. A small motor 392 is fixedly connected inside the mounting shell 391. The small motor 392 is connected to the vehicle internal circuit. The output end of the small motor 392 is fixedly connected to a driving shaft 393. A gear one 394 is fixedly connected to the driving shaft 393. An annular gear two 397 meshing with the gear one 394 is fixedly connected to the outer annular plate 35 on the side away from the connecting part 11. A rotating shaft 395 is fixedly connected to the center of the support frame 34 on the side away from the connecting part 11. A pulley assembly 396 is connected in a transmission manner between the rotating shaft 395 and the driving shaft 393;

[0043] During use, the waste gas passes through the filtering part 12 and then enters the mixing box 41 through the filter holes 301 on the filter cover 31. The small motor 392 is started. The small motor 392 drives the driving shaft 393 to rotate. The rotation of the driving shaft 393 drives the gear one 394 and the pulley assembly 396 to rotate at the same time. The transmission of the pulley assembly 396 drives the rotating shaft 395 to rotate. The rotation of the rotating shaft 395 drives the inner annular plate 33 to rotate inside the annular groove 32 through the support frame 34, thereby driving the brush cylinder 38 to rotate and cleaning the inner wall of the filtering part 12. At the same time, the gear one 394 drives the gear two 397 to mesh and rotate. The rotation of the gear two 397 drives the outer annular plate 35 to rotate, thereby driving the external brush cylinder 38 to clean the outer wall of the filtering part 12.

[0044] The gas mixing assembly 4 includes a mixing box 41 fixedly connected to the side of the filter cover 31 away from the ground. The mixing box 41 is communicated with the filter holes 301. One side of the mixing box is connected with an air inlet pipe 42. The air inlet pipe 42 is located in the middle of the mixing box 41 and is offset from the position of the filter holes 301. The side of the mixing box 41 away from the connecting part 11 is fixedly connected with an air outlet pipe 44. When in use, the tail gas enters the interior of the mixing box 41 through the filter holes 301 and then mixes with the air entering through the air inlet pipe 42, and finally is communicated with the intake manifold of the vehicle through the air outlet pipe 44.

[0045] The dust accumulation assembly 5 includes dust falling holes 51 opened at the bottom of the filter cover 31 along the length direction of the filter cover 31. Symmetrically fixed to both sides of the dust falling holes 51 outside the filter cover 31 are sliding seats 52 along the length direction of the filter cover 31. On the mutually facing side walls of the two sliding seats 52, chutes 53 are opened along their length directions. Inside the chutes 53, a dust accumulation box 54 with an opening facing the dust falling holes 51 is slidably connected. At one end of the two sliding seats 52 close to the connecting part 11, there is a clamping assembly 55 that abuts against the end face of the dust accumulation box 54. The clamping assembly 55 includes fixed seats 551 fixed to the sides of the two sliding seats 52 close to the connecting part 11. Between the two fixed seats 551, a rotating shaft 552 is rotatably connected. Fixedly connected to the rotating shaft 552 is a pressing plate 554 that abuts against the end face of the dust accumulation box 54. A torsion spring 553 is fixedly connected between the pressing plate 554 and the fixed seat 551. When in use, the dust cleaned by the secondary dust cleaning assembly 3 will fall into the dust accumulation box 54 for collection. When it is necessary to clean the dust accumulation box 54, the pressing plate 554 is rotated upward, and the pressing plate 554 starts to disengage from the surface of the dust accumulation box 54, and then the torsion spring 553 starts to store energy. At this time, the dust accumulation box 54 can be pulled out of the chute 53 for cleaning. After cleaning, it is placed back in the original position, and then using the acting force of the torsion spring 553 on the pressing plate 554, the pressing plate 554 is abutted against the end face of the dust accumulation box 54 to limit and fix the dust accumulation box 54.

[0046] The cross-sectional shape of the clamping strip 23 is C-shaped, and a part of it extends to the outside of the connecting part 11. When in use, the shape design of the clamping strip 23 facilitates the operator to stretch the clamping strip 23 outward and can conveniently take out the filter plate 22.

[0047] A number of flow disturbing plates 7 are fixedly connected inside the mixing box 41. In this embodiment, the number of flow disturbing plates 7 is ten. When in use, the flow disturbing plates 7 can improve the mixing degree between the air and the tail gas, which is beneficial to the combustion of the tail gas.

[0048] According to the above-mentioned embodiment, Embodiment Two,

[0049] The brush barrel 38 on the outer annular plate 35 is fixedly connected with a brush on one side and a scraper 6 on the other side. The brush cooperates with the outer wall of the filtering part 12, and the scraper 6 cooperates with the inner wall of the filter cover 31. During use, by the cooperation of the brush and the scraper 6, the attached solid particles can be cleaned in multiple directions, which is beneficial to the flow of the tail gas.

[0050] According to the above embodiment, Embodiment Three,

[0051] The intake pipe 42 is located on the side of the mixing box 41 away from the ground and has an inclined structure. During use, since the tail gas moves upward due to a certain temperature, and the temperature of the air is lower than that of the tail gas and will move downward, arranging the intake pipe 42 at the top of the mixing box 41 can promote the mixing between the air and the tail gas, and the inclined design of the intake pipe 42 can reduce the influence of the inflow of air on the flow rate of the tail gas.

[0052] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An EGR-based exhaust gas treatment device, comprising: Connecting pipe (1); It is characterized in that: The connecting pipe (1) includes a connecting part (11) and a filtering part (12); A primary dust cleaning assembly (2), the primary dust cleaning assembly (2) is connected to the connecting part (11) to preliminarily filter solid particles in the tail gas; A secondary dust cleaning assembly (3), the secondary dust cleaning assembly (3) is connected to the filtering part (12), the secondary dust cleaning assembly (3) filters solid particles in the tail gas and cleans the attached solid particles; A gas mixing assembly (4), the gas mixing assembly (4) is connected to the secondary dust cleaning assembly (3) for mixing the tail gas and external air; A dust accumulation assembly (5), the dust accumulation assembly (5) is connected to the secondary dust cleaning assembly (3) for collecting solid particles; The primary dust cleaning assembly (2) includes a clamping groove (21) opened in the connecting part (11). One side of the clamping groove (21) is communicated with the outside and the other side is closed. A filter plate (22) that cooperates with the tail gas inside the connecting part (11) is slidably connected inside the clamping groove (21). On both sides of the filter plate (22) on the connecting part (11), elastic clamping strips (23) that clamp the side wall of the filter plate (22) are symmetrically and fixedly connected; The secondary dust cleaning assembly (3) includes a cylindrical filter cover (31) fixedly connected to the outer periphery of the filtering part (12). A filter hole (301) is opened on the side of the filter cover (31) away from the ground. Annular grooves (32) are respectively opened on both sides inside the filtering part (12). An inner annular plate (33) is rotatably connected inside the annular groove (32). A cross-shaped support frame (34) is fixedly connected to the inner wall of the inner annular plate (33). Annular grooves (32) are also respectively opened at positions corresponding to the internal annular grooves (32) on both sides outside the filtering part (12). Outer annular plates (35) are rotatably connected in the two outer annular grooves (32) on both sides. Mounting plates (36) are fixedly connected to both the inner annular plates (33) and the outer annular plates (35) on both sides. Brush shafts (37) are fixedly connected between the mounting plates (36) corresponding to the inner annular plates (33) on both sides and between the mounting plates (36) corresponding to the outer annular plates (35) on both sides. Brush cylinders (38) are fixedly connected to the brush shafts (37). The secondary dust cleaning assembly (3) further includes a driving assembly (39), and the driving assembly (39) drives the inner annular plate (33) and the outer annular plate (35) to rotate.

2. The exhaust gas treatment device based on EGR according to claim 1, characterized in that: The driving assembly (39) comprises a mounting shell (391) fixedly connected to one side of the filter cover (31), a small motor (392) fixedly connected inside the mounting shell (391), an output end of the small motor (392) fixedly connected to a driving shaft (393), a gear 1 (394) fixedly connected to the driving shaft (393), a ring gear 2 (397) meshing with the gear 1 (394) fixedly connected to the outer ring plate (35) on the side away from the connecting portion (11), a rotating shaft (395) fixedly connected to the center of the supporting frame (34) on the side away from the connecting portion (11), and a pulley assembly (396) is connected in a transmission manner between the rotating shaft (395) and the driving shaft (393).

3. The exhaust gas treatment device based on EGR according to claim 2, characterized in that: The gas mixing assembly (4) comprises a mixing box (41) fixedly connected to a side of the filter cover (31) away from the ground, the mixing box (41) being in communication with the filter hole (301), one side of the mixing box being connected to an air inlet pipe (42), and a side of the mixing box (41) away from the connecting portion (11) being fixedly connected to an air outlet pipe (44).

4. An exhaust gas treatment device based on EGR according to claim 3, characterized in that: The dust collection assembly (5) comprises a dust collection hole (51) provided at the bottom of the filter cover (31) along the length direction of the filter cover (31); sliding seats (52) along the length direction of the filter cover (31) are symmetrically fixedly connected to the two sides of the dust collection hole (51) outside the filter cover (31); sliding grooves (53) are provided on the side walls of the sliding seats (52) on both sides away from each other along the length direction thereof; a dust collection box (54) opened toward one side of the dust collection hole (51) is slidably connected inside the sliding groove (53); and a clamping assembly (55) abutting against the end surface of the dust collection box (54) is provided at one end of the sliding seats (52) on both sides close to the connecting portion (11).

5. The exhaust gas treatment device based on EGR according to claim 4, characterized in that: The engaging assembly (55) comprises a fixed seat (551) fixed to the sliding seat (52) on both sides close to the connecting portion (11); a rotating shaft (552) is rotatably connected between the fixed seats (551) on both sides; a pressing plate (554) abutting against the end surface of the dust box (54) is fixedly connected to the rotating shaft (552); and a torsion spring (553) is fixedly connected between the pressing plate (554) and the fixed seat (551).

6. The exhaust gas treatment device based on EGR according to claim 1, characterized in that: The cross-sectional shape of the clamping strip (23) is C-shaped, and a portion thereof extends to the outside of the connecting portion (11).

7. An exhaust gas treatment device based on EGR according to claim 3, characterized in that: The air inlet pipe (42) is located on a side of the mixing box (41) away from the ground and has an inclined structure.

8. An EGR-based exhaust gas treatment device according to claim 3, characterized in that: Several flow-interference plates (7) are fixedly connected inside the mixing box (41).

Images