Automobile exhaust treatment equipment

Abstract

The invention relates to the technical field of tail gas treatment, in particular to automobile tail gas treatment equipment which comprises an exhaust pipe, a gas guide unit, a sweeping unit, a purification unit and a silencing unit which are sequentially connected in the tail gas flowing direction. The air guiding unit comprises an air guiding inner pipe and an air guiding outer pipe which are coaxially arranged, the cleaning unit is detachably and fixedly installed on the outer wall of the air guiding inner pipe, the purifying unit is coaxially arranged on the inner wall of the air guiding outer pipe in a sleeving mode and makes contact with the cleaning unit, and the silencing unit is detachably connected to the air outlet end of the air guiding unit and makes contact with the cleaning unit. According to the automobile exhaust purification device, fine particles deposited on the surface of the purification unit are cleaned, particle impurities are collected through the dust collection groove after treatment, finally, automobile exhaust is subjected to resistive noise reduction through the noise reduction device, the automobile exhaust purification effect is good, and pollution of the automobile exhaust is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of tail gas treatment, and in particular to an automobile tail gas treatment device. Background Art

[0002] As the use of cars becomes more and more popular, cars have provided great convenience for people's travel. However, as the number of cars increases, the emission of automobile exhaust is increasing, and the direct emission of automobile exhaust will cause environmental pollution; the pollutants include solid fine particles, carbon monoxide, carbon dioxide, hydrocarbons and sulfur oxides. If the automobile exhaust is treated when it is discharged, the pollution of exhaust gas to the air can be greatly reduced.

[0003] Over the long term, unburned particulate matter in traditional exhaust purification systems tends to gradually deposit on the inner walls of the purification unit, forming a dense carbon layer. This negatively impacts the airflow channel area, reduces engine power, and covers catalytic active sites. Existing technologies often rely on manual cleaning or high-pressure flushing during downtime, resulting in high maintenance costs and incomplete cleaning. Furthermore, conventional rotating brushes are prone to elastic failure under high-temperature conditions, resulting in poor contact between the brush and the purification surface, directly impairing cleaning performance and even accelerating wear of the purification unit.

[0004] In order to solve these problems, improve the effect of automobile exhaust treatment and reduce the pollution of automobile exhaust to the environment, an automobile exhaust treatment device is proposed. Summary of the Invention

[0005] In view of the above-mentioned defects of the prior art, the object of the present invention is to provide an automobile exhaust treatment device for treating fine particulate matter deposited in an exhaust purification device.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The automobile exhaust treatment device of the present invention comprises:

[0008] An exhaust pipe, the exhaust pipe having an air inlet end and an air outlet end, the air inlet end being connected to an air inlet hole;

[0009] An air guide unit is coaxially connected to the outlet end of the exhaust pipe, and includes a coaxially arranged inner air guide tube and an outer air guide tube. The inner air guide tube has a plurality of radial through holes circumferentially provided on its wall. The outer air guide tube is sealed and fixedly connected to the exhaust pipe, and the inner air guide tube is rotatably arranged inside the outer air guide tube. An exhaust passage for exhaust is axially provided on the inner wall of the outer air guide tube. A disc is provided at one end of the inner air guide tube away from the exhaust pipe to seal the inner air guide tube port to ensure that exhaust gas is discharged along the through holes.

[0010] a cleaning unit, the cleaning unit being detachably fixedly mounted on the outer wall of the inner air guide tube;

[0011] a purification unit, the purification unit being coaxially sleeved on the inner wall of the air guide outer tube and in contact with the cleaning unit;

[0012] and a silencer unit, wherein the silencer unit is detachably connected to the air outlet end of the air guide unit.

[0013] Preferably, the cleaning unit includes a cleaning brush, a dust collecting trough and a driving plate. The cleaning brush is elastically connected to the outer surface of the air guide inner tube through an elastic member. The dust collecting trough is detachably arranged at the tail end of the air guide outer tube, and the dust collecting trough passes through the air guide outer tube and the purification unit on one side. The driving plate is installed in the inner cavity of the air guide inner tube, and the driving plate is a spiral plate.

[0014] Preferably, the cleaning brush is a gradient composite structure comprising a high temperature resistant base layer and a surface silicon carbide wear-resistant coating. The cleaning brush is spirally arranged on the outer surface of the inner air guide tube, and the spiral angle of the cleaning brush is 15°-25°.

[0015] Preferably, the purification unit is a three-way catalytic converter.

[0016] Preferably, the silencer unit includes a silencer pipe and a ceramic sheet, the silencer pipe is a funnel-shaped structure, the ceramic sheet and the silencer pipe are detachably installed, the silencer pipe is provided with a protruding cavity for collecting fine particulate matter discharged from automobile exhaust, the ceramic sheet is a honeycomb-shaped structure, and 80-120 honeycomb through holes are provided on the ceramic sheet.

[0017] Preferably, the cross-section of the cleaning brush is rectangular to increase the contact area with foreign particles.

[0018] Preferably, the end of the brush head of the cleaning brush is hemispherical in design, and the hemispherical end of the cleaning brush forms point contact with the inner wall of the purification unit.

[0019] Preferably, the elastic member is made of Inconel 718 alloy, has temperature self-compensation characteristics, and can maintain a constant elastic modulus under high temperature conditions.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This invention converts the exhaust gas flow energy into rotational mechanical energy through a drive plate inside the air guide unit, driving a spirally arranged cleaning brush to continuously scrape the purification surface. Combined with the compensation characteristics of the high-temperature resistant components, this ensures stable contact pressure under different working conditions. This self-driven cleaning mechanism not only avoids the drawbacks of traditional downtime maintenance, but its spiral airflow guide design also achieves efficient collection of peeled particles, significantly extending the effective service life of the purification component.

[0022] 2. The purification unit of the present invention is a three-way catalytic converter. Under the catalytic and adsorption effects of the three-way catalytic converter, when the exhaust gas passes through, it reacts with the harmful gases in the exhaust gas and converts the harmful gases into harmless substances. The honeycomb ceramic structure used in conjunction with it not only reduces noise through a tortuous air path, but its internal channels can also recycle the waste heat of the exhaust gas, thereby reducing energy consumption in subsequent processing links. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is an overall cross-sectional view of the present invention;

[0025] Figure 2 It is a schematic diagram of the cleaning unit of the present invention;

[0026] Figure 3 is a cross-sectional view of the cleaning unit of the present invention;

[0027] Figure 4 Schematic diagram of the drive board of the present invention;

[0028] Figure 5 is a cross-sectional view of the gas guide outer tube of the present invention;

[0029] Figure 6 Schematic diagram of the inner air guide tube of the present invention;

[0030] Figure 7 Schematic diagram of the muffler pipe of the present invention;

[0031] Figure 8 is a top view of the ceramic sheet of the present invention;

[0032] Figure 9 It is a schematic diagram of the installation of the air bag of the present invention.

[0033] In the figure: 1. Exhaust pipe; 2. Air guide unit; 21. Inner air guide tube; 22. Outer air guide tube; 23. Through hole; 24. Disc; 25. Exhaust channel; 3. Cleaning unit; 31. Cleaning brush; 32. Dust collecting trough; 33. Drive plate; 4. Silencer unit; 41. Silencer tube; 42. Ceramic sheet; 43. Cavity; 44. Honeycomb through hole; 5. Purification unit; 6. Air bag; 61. Support rod; 7. Air inlet; 8. Air outlet. DETAILED DESCRIPTION

[0034] The following is a further description of specific embodiments of the present invention with reference to the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0035] like Figures 1 to 9 As shown; the automobile exhaust treatment device of the present invention comprises:

[0036] An exhaust pipe 1, the exhaust pipe 1 having an air inlet end and an air outlet end, the air inlet end being connected to an air inlet hole 7;

[0037] An air guide unit 2 is coaxially connected to the air outlet end of the exhaust pipe 1. The air guide unit 2 includes a coaxially arranged air guide inner tube 21 and an air guide outer tube 22. A plurality of radial through holes 23 are circumferentially provided on the tube wall of the inner air guide tube 21; the outer air guide tube 22 is sealed and fixedly connected to the exhaust pipe 1, and the inner air guide tube 21 is rotatably arranged inside the outer air guide tube 22; an exhaust channel 25 for exhaust is axially provided on the inner wall of the outer air guide tube 22; a disc 24 for sealing the port of the inner air guide tube 21 is provided at the end of the inner air guide tube 21 away from the exhaust pipe 1 to ensure that the exhaust gas is discharged along the through hole 23.

[0038] After entering inner air guide tube 21, the exhaust gas's flow path is altered to a radially diffuse pattern by the blocking action of disk 24. The exhaust gas then flows through multiple circumferentially distributed through-holes 23 on the wall of inner air guide tube 21 to the purification unit 5 for purification. The design of disk 24 effectively prevents some exhaust gas from being discharged unpurified, fully ensuring the exhaust gas purification effect.

[0039] A cleaning unit 3, the cleaning unit 3 is detachably fixedly mounted on the outer wall of the air guide inner tube 21;

[0040] A purification unit 5 , the purification unit 5 is coaxially sleeved on the inner wall of the air guide outer tube 22 and contacts the cleaning unit 3 ;

[0041] and a silencer unit 4 , wherein the silencer unit 4 is detachably connected to the air outlet end of the air guide unit 2 .

[0042] The exhaust gas passes through the air inlet 7, the exhaust pipe 1, the air guide inner pipe 21, the cleaning unit 3, the purification unit 5, the exhaust channel 25, the muffler unit 4 and the air outlet 8 in sequence. When the exhaust gas passes through the air guide inner pipe 21, the exhaust gas after guidance enters the purification unit 5 for treating the exhaust gas of the automobile. After being purified, the exhaust gas of the automobile enters the muffler unit 4 through the exhaust channel 25, and resistive muffler treatment is performed on the noise generated by the vibration of the exhaust pipe 1 of the automobile.

[0043] As an embodiment of the present invention, the cleaning unit 3 includes a cleaning brush 31, a dust collecting trough 32 and a driving plate 33. The cleaning brush 31 is elastically connected to the outer surface of the air guide inner tube 21 through an elastic member. The dust collecting trough 32 is detachably arranged at the tail end of the air guide outer tube 22, and the dust collecting trough 32 passes through the air guide outer tube 22 and the purification unit 5 on one side. The driving plate 33 is installed in the inner cavity of the air guide inner tube 21, and the driving plate 33 is a spiral plate.

[0044] The cleaning brush 31 is a gradient composite structure including a high-temperature resistant base layer and a surface silicon carbide wear-resistant coating. The cleaning brush 31 is spirally arranged on the outer surface of the inner air guide tube 21 , and the spiral angle of the cleaning brush 31 is 15°-25°.

[0045] The cross-section of the cleaning brush 31 is rectangular to increase the contact area with foreign particles.

[0046] The end of the cleaning brush 31 is hemispherical in design, and the hemispherical end of the cleaning brush 31 forms point contact with the inner wall of the purification unit 5 .

[0047] The elastic member is made of Inconel 718 alloy, has temperature self-compensation characteristics, and can maintain a constant elastic modulus under high temperature conditions.

[0048] After exhaust gas enters the inner air tube 21 through the air inlet 7, it first impacts the spiral surface of the drive plate 33. The high-speed airflow pushes the drive plate 33 to rotate, which in turn drives the entire inner air tube 21 to rotate within the purification unit 5. As the inner air tube 21 rotates, the spirally wound cleaning brush 31 is driven to rotate together via the elastic member. The bristles of the cleaning brush 31 contact the inner wall of the purification unit 5 at an inclined angle. When the hemispherical end of the cleaning brush 31 contacts the inner wall of the purification unit 5, it effectively reduces the resistance between the cleaning brush 31 and the purification unit 5, which is beneficial to the rotation of the cleaning brush 31 and can reduce surface wear of the cleaning brush 31. As a result, a continuous and staggered scraping track is formed during the rotation process, effectively stripping away particulate impurities attached to the inner surface of the purification unit 5. In addition, the rectangular cleaning brush 31 increases the contact area with impurity particles, facilitating the cleaning of impurity particles. Through the self-driven design of the exhaust kinetic energy, synchronous cleaning operations are achieved during the exhaust treatment process without interrupting the purification process or requiring an external power source.

[0049] When the effective length of the bristles decreases due to long-term wear, and the cleaning brush 31 is no longer able to fully contact the inner surface of the purification unit 5, the contact pressure between the cleaning brush 31 and the inner surface of the purification unit 5 decreases, and the elastic member releases its pre-stored elastic potential energy, pushing the cleaning brush 31 to rotate a certain angle until the cleaning brush 31 contacts the inner surface of the purification unit 5 again, at which point the elastic member stops releasing its elastic potential energy. This automatic compensation mechanism ensures that the cleaning brush 31 always maintains effective contact pressure with the inner wall of the purification unit 5 at different stages of wear, thereby ensuring an effective cleaning effect.

[0050] The impurity particles removed by the cleaning brush 31 are separated from the inner wall of the purification unit 5 by centrifugal force and enter the annular chamber between the air guide inner tube 21 and the purification unit 5. At this time, the spiral winding arrangement of the cleaning brush 31 takes effect. When the cleaning brush 31 rotates, it creates a screw-like conveying effect, pushing the impurity particles along the spiral trajectory toward the dust collection trough 32. Under the action of the airflow, the impurity particles eventually enter the collection chamber of the dust collection trough 32, completing the collection and processing of the impurity particles.

[0051] As an embodiment of the present invention, the purification unit 5 is a three-way catalytic converter.

[0052] After the automobile exhaust passes through the guiding function of the air guide unit 2, the purification unit 5 can play the greatest role. The three-way catalytic converter can adsorb and catalyze these harmful substances, converting them into harmless substances, thereby treating the automobile exhaust.

[0053] As an embodiment of the present invention, the silencer unit 4 includes a silencer pipe 41 and a ceramic sheet 42. The silencer pipe 41 is a funnel-shaped structure. The ceramic sheet 42 and the silencer pipe 41 are detachably installed. The silencer pipe 41 is provided with a protruding cavity 43 for collecting fine particulate matter discharged from automobile exhaust. The ceramic sheet 42 is a honeycomb-shaped structure and is provided with 80-120 honeycomb through holes 44.

[0054] There will be a continuous flow of air during the driving of the car. There will not be much impurity particles accumulated when the vehicle is just started, and they will be processed by the cleaning unit 3. After the vehicle has been started for a period of time, when the impurity particles accumulate too much, the airflow will blow a small part of the fine particles to the silencer unit 4, and finally gather in the raised cavity 43 on the silencer unit 4. Since it is detachable, it is convenient to clean it regularly, avoiding repeated manual cleaning; the ceramic sheet 42 uses resistive silencers to eliminate the inevitable noise in the exhaust pipe 1. If a precious metal catalyst is coated on the surface of the ceramic sheet 42, it can catalyze the oxidation reaction of carbon monoxide and volatile organic compounds, converting them into harmless substances such as carbon dioxide and water. At the same time, it can also catalyze the reduction reaction of nitrogen oxides, converting them into harmless substances such as nitrogen and water. However, since the price of precious metal catalysts is generally high, you can choose whether to coat it according to the actual use scenario of the vehicle.

[0055] Regarding the silencer unit 4, the present invention also proposes another embodiment, comprising a silencer tube 41, a plurality of airbags 6, and a support rod 61. The airbags 6 are heat-resistant airbags. Too few airbags 6 do not have a good silencer effect, and too many airbags 6 may squeeze each other and explode. Therefore, 12 airbags 6 are selected, and then 8 airbags 6 are arranged in a linear array along the silencer tube 41. Each airbag 6 has a support rod 61 under it to support the airbag 6, so that the airbag 6 can achieve a better effect in the silencer tube. By utilizing the heat of the car exhaust, after the car has been running for a period of time, the air or water in the airbag 6 is heated and expanded or vaporized to inflate the airbag 6; when the car exhaust passes through the airbag 6, most of the sound waves are absorbed by the airbag 6, and a small part of the sound waves are weakened after multiple reflections of the airbag 6, thereby achieving a silencer effect.

[0056] The difference of this embodiment is that the ceramic sheet 42 is replaced with the airbag 6, so that the car gas has a better passage and the gas can flow faster, thereby reducing the resistance and pressure loss of the system, improving combustion efficiency and power output, but it cannot cool the car exhaust and the silencing effect is worse than that of the ceramic sheet 42.

[0057] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, various changes, modifications, substitutions and variations are made to these implementation modes. These changes and improvements all fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the appended claims and their equivalents. Even though the present invention has been described with reference to specific example embodiments of the present invention, many different alternatives, modifications, etc. will become obvious to those skilled in the art.

Claims

1. An automobile exhaust treatment device, characterized in that: Including connected in sequence along the exhaust gas flow direction: An exhaust pipe (1), the exhaust pipe (1) having an air inlet end and an air outlet end, the air inlet end being connected to an air inlet hole (7); An air guide unit (2), the air guide unit (2) is coaxially connected to the air outlet end of the exhaust pipe (1), the air guide unit (2) comprises a coaxially arranged air guide inner pipe (21) and an air guide outer pipe (22), a plurality of radial through holes (23) are circumferentially provided on the pipe wall of the air guide inner pipe (21); the air guide outer pipe (22) is sealed and fixedly connected to the exhaust pipe (1), and the air guide inner pipe (21) is rotatably arranged inside the air guide outer pipe (22); an exhaust channel (25) for exhaust is axially provided on the inner wall of the air guide outer pipe (22); a disc (24) for blocking a port of the air guide inner pipe (21) is provided at one end of the air guide inner pipe (21) away from the exhaust pipe (1) to ensure that the exhaust gas is discharged along the through holes (23); a cleaning unit (3), the cleaning unit (3) being detachably fixedly mounted on the outer wall of the air guide inner tube (21); a purification unit (5), the purification unit (5) being coaxially sleeved on the inner wall of the air guide outer tube (22) and in contact with the cleaning unit (3); and a silencer unit (4), wherein the silencer unit (4) is detachably connected to the air outlet end of the air guide unit (2).

2. The automobile exhaust treatment equipment according to claim 1, characterized in that: The cleaning unit (3) comprises a cleaning brush (31), a dust collecting trough (32) and a driving plate (33); the cleaning brush (31) is elastically connected to the outer surface of the air guide inner tube (21) through an elastic member; the dust collecting trough (32) is detachably arranged at the rear end of the air guide outer tube (22); and the dust collecting trough (32) penetrates the air guide outer tube (22) and the purification unit (5) on one side; the driving plate (33) is installed in the inner cavity of the air guide inner tube (21); and the driving plate (33) is a spiral plate.

3. The automobile exhaust treatment equipment according to claim 2, characterized in that: The cleaning brush (31) is a gradient composite structure comprising a high-temperature resistant base layer and a surface silicon carbide wear-resistant coating. The cleaning brush (31) is arranged in a spiral shape on the outer surface of the air guide inner tube (21). The spiral angle of the cleaning brush (31) is 15°-25°.

4. The automobile exhaust treatment equipment according to claim 1, characterized in that: The purification unit (5) is a three-way catalytic converter.

5. The automobile exhaust treatment equipment according to claim 1, characterized in that: The muffler unit (4) comprises a muffler pipe (41) and a ceramic sheet (42); the muffler pipe (41) is a funnel-shaped structure; the ceramic sheet (42) and the muffler pipe (41) are detachably mounted; a protruding cavity (43) is provided on the muffler pipe (41) for collecting fine particles discharged from automobile exhaust; the ceramic sheet (42) is a honeycomb-shaped structure; and 80-120 honeycomb through holes (44) are provided on the ceramic sheet (42).

6. The automobile exhaust treatment equipment according to claim 3, characterized in that: The cross-sectional shape of the cleaning brush (31) is rectangular.

7. The automobile exhaust treatment equipment according to claim 3, characterized in that: The end of the brush head of the cleaning brush (31) is designed to be hemispherical, and the hemispherical end of the cleaning brush (31) forms point contact with the inner wall of the purification unit (5).

8. The automobile exhaust treatment equipment according to claim 2, characterized in that: The elastic member is made of Inconel718 alloy.

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