Self-cleaning exhaust pipe and automobile

Abstract

This invention discloses a self-cleaning exhaust pipe and an automobile. The self-cleaning exhaust pipe includes: a pipe body having a flue gas passage, and an inlet and an outlet communicating with the flue gas passage; a drive assembly rotatably disposed within the flue gas passage, the drive assembly rotating around a first axis under the action of flue gas flowing from the inlet to the outlet; and a scraping assembly rotatably disposed within the flue gas passage, the scraping assembly rotating around a second axis under the drive of the drive assembly, with the scraper of the scraping assembly abutting against the inner wall of the flue gas passage to scrape away impurities adhering to the inner wall of the flue gas passage during rotation; wherein the second axis is angled to the first axis. The self-cleaning exhaust pipe of this invention, by setting up a drive assembly and a scraping assembly, and utilizing the kinetic energy of the flue gas flow to drive the drive assembly to rotate, and then transmitting the power to the scraping assembly, causes the scraping assembly to rotate circumferentially along the inner wall of the flue gas passage, thereby achieving automatic scraping of impurities from the inner wall of the flue gas passage.

Description

Technical Field

[0001] This invention relates to the field of automotive exhaust pipe technology, and more particularly to a self-cleaning exhaust pipe and an automobile. Background Technology

[0002] The car exhaust pipe is part of the engine exhaust system. The exhaust system mainly includes the exhaust manifold, exhaust pipe, and muffler. A catalytic converter, which controls engine pollutant emissions, is also typically installed in the exhaust system. Exhaust pipes generally include front and rear exhaust pipes. The function of the car exhaust pipe is to reduce vibration and noise, and extend the lifespan of the exhaust muffler system.

[0003] Automobile exhaust is the waste gas produced when a car is in use. It contains hundreds of different compounds, including pollutants such as particulate matter, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, lead, and sulfur oxides. Particulate matter in automobile exhaust can adsorb various metal dusts, the potent carcinogen benzo[a]pyrene, and pathogenic microorganisms. Therefore, when automobile exhaust is expelled, these particulate matter adheres to the inside of the exhaust pipe. Long-term accumulation can easily lead to blockage of the exhaust pipe, thus affecting normal exhaust flow.

[0004] Currently, engine exhaust pipe maintenance mainly relies on regular manual cleaning. Manual maintenance is inefficient and costly, not only consuming valuable time resources but also increasing maintenance costs. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a self-cleaning exhaust pipe and automobile to solve the technical problem that the maintenance of existing engine exhaust pipes mainly relies on regular manual cleaning, which is inefficient and costly, not only consuming valuable time resources but also increasing maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a self-cleaning exhaust pipe, comprising: a pipe body having a flue gas passage, and an inlet and an outlet communicating with the flue gas passage; a drive assembly rotatably disposed within the flue gas passage, the drive assembly rotating about a first axis under the action of flue gas flowing from the inlet to the outlet; and a scraping assembly rotatably disposed within the flue gas passage, the scraping assembly rotating about a second axis under the drive of the drive assembly, wherein the scraper of the scraping assembly abuts against the inner wall of the flue gas passage to scrape off impurities adhering to the inner wall of the flue gas passage during rotation; wherein the second axis is angled to the first axis.

[0007] In some embodiments, the drive assembly includes a first drive shaft and a plurality of fan blades connected to the first drive shaft, wherein the first drive shaft is the axis of the first drive shaft and the first drive shaft is parallel to the radial direction of the tube body.

[0008] In some embodiments, the scraping assembly includes: a second drive shaft and a plurality of scraping blades connected to the second drive shaft, the second drive shaft being the axis of the second drive shaft, and the plurality of scraping blades and the second drive shaft being parallel to the axial direction of the tube body; the second drive shaft is drively connected to the first drive shaft.

[0009] In some embodiments, the plurality of scraper blades are divided into two groups, and the two groups of scraper blades are respectively disposed at both ends of the second drive shaft; the two groups of scraper blades are staggered in the circumferential direction; soft brushes are respectively extended from the proximal ends of the two groups of scraper blades; and the soft brushes of the scraper blades located in different groups have overlapping portions along the axial direction.

[0010] In some embodiments, the self-cleaning exhaust pipe further includes a transmission assembly, the transmission assembly including a meshing first bevel gear and a second bevel gear, the first bevel gear being connected to the first transmission shaft, and the second bevel gear being connected to the second bevel gear; The self-cleaning mechanism also includes a sealing box, the transmission component is disposed inside the sealing box, and the drive component and the scraping component are both disposed outside the sealing box.

[0011] In some embodiments, the self-cleaning exhaust pipe further includes a flushing assembly with the same number of wiper blades. The flushing assembly includes an inlet pipe, a mounting box, a nozzle, and a protective net. The mounting box is embedded in the pipe body and has an opening facing the flue gas passage. The circumferential width of the opening is greater than the circumferential width of the wiper blades. The protective net is disposed in the opening. The inlet pipe is connected to the input end of the nozzle, the nozzle is located inside the mounting box, and the output end of the nozzle faces the protective net.

[0012] In some embodiments, the self-cleaning exhaust pipe further includes an elastic limiting component, the elastic limiting component including an installation cavity formed in the pipe body and communicating with the flue gas passage, and an elastic member and a stop member disposed in the installation cavity; The stop member extends into the flue gas channel under the elastic force of the elastic member to limit the scraping assembly to a position directly opposite the protective net; the stop member overcomes the elastic force of the elastic member and exits the flue gas channel under the action of the flue gas.

[0013] In some embodiments, the scraper includes a scraping portion, an elastic portion, and a mounting portion. The mounting portion is fixedly connected to the second drive shaft. The scraping portion is disposed on the side of the mounting portion facing the inner wall of the flue gas passage and abuts against the inner wall of the flue gas passage. The elastic portion is disposed between the scraping portion and the mounting portion.

[0014] In some embodiments, the self-cleaning exhaust pipe further includes a collection box embedded in the pipe body, the collection box having a collection port facing the flue gas passage.

[0015] In a second aspect, the present invention provides an automobile, including an engine and the self-cleaning exhaust pipe described in the first aspect, the self-cleaning exhaust pipe being connected to the exhaust end of the engine.

[0016] The self-cleaning exhaust pipe of the present invention, by setting up a drive component and a scraping component, utilizes the kinetic energy of the flue gas flow to drive the drive component to rotate, and then transmits the power to the scraping component, causing the scraping component to rotate circumferentially along the inner wall of the flue gas passage, thereby realizing the automatic scraping of impurities on the inner wall of the flue gas passage. It does not require an external power source, and can complete self-cleaning solely by the energy of the flue gas discharged from the engine, thus solving the technical problems of easy carbon accumulation on the inner wall of the exhaust pipe and the need for regular manual cleaning in the prior art.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the self-cleaning exhaust pipe according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the self-cleaning exhaust pipe according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the cooperative structure of the drive component and the scraping component in the self-cleaning exhaust pipe according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the transmission assembly in the self-cleaning exhaust pipe according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the separation structure of the flushing component in the self-cleaning exhaust pipe according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the scraper in the self-cleaning exhaust pipe according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the collection box in the self-cleaning exhaust pipe according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 10. Pipe body; 20. Drive assembly; 21. Fan blade; 22. First drive shaft; 30. Scraping assembly; 31. Scraper strip; 311. Scraper part; 312. Elastic part; 313. Mounting part; 32. Second drive shaft; 33. Connecting rod; 40. Transmission assembly; 41. First bevel gear; 42. Second bevel gear; 50. Sealing box; 51. Mounting column; 60. Flushing assembly; 61. Liquid inlet pipe; 62. Mounting box; 63. Nozzle; 64. Protective net; 70. Collection box. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] 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.

[0022] The car exhaust pipe is part of the engine exhaust system. The exhaust system mainly includes the exhaust manifold, exhaust pipe, and muffler. A catalytic converter, which controls engine pollutant emissions, is also typically installed in the exhaust system. Exhaust pipes generally include front and rear exhaust pipes. The function of the car exhaust pipe is to reduce vibration and noise, and extend the lifespan of the exhaust muffler system.

[0023] Automobile exhaust is the waste gas produced when a car is in use. It contains hundreds of different compounds, including pollutants such as particulate matter, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, lead, and sulfur oxides. Particulate matter in automobile exhaust can adsorb various metal dusts, the potent carcinogen benzo[a]pyrene, and pathogenic microorganisms. Therefore, when automobile exhaust is expelled, these particulate matter adheres to the inside of the exhaust pipe. Long-term accumulation can easily lead to blockage of the exhaust pipe, thus affecting normal exhaust flow.

[0024] Currently, engine exhaust pipe maintenance mainly relies on regular manual cleaning. Manual maintenance is inefficient and costly, not only consuming valuable time resources but also increasing maintenance costs.

[0025] Please see Figures 1-3This invention provides a self-cleaning exhaust pipe, comprising: a pipe body 10 having a flue gas passage, and an inlet and an outlet connected to the flue gas passage; a drive assembly 20 rotatably disposed within the flue gas passage, the drive assembly 20 rotating around a first axis under the action of flue gas flowing from the inlet to the outlet; and a scraping assembly 30 rotatably disposed within the flue gas passage, the scraping assembly 30 rotating around a second axis under the drive of the drive assembly 20, and the scraper 31 of the scraping assembly 30 abutting against the inner wall of the flue gas passage to scrape off impurities adhering to the inner wall of the flue gas passage during rotation; wherein the second axis is angled to the first axis.

[0026] For example, the air inlet of the pipe body 10 is connected to the exhaust end of the engine. When the engine is working, the flue gas generated enters the flue gas passage through the air inlet. During the flow through the flue gas passage, solid suspended particles, carbon soot and other impurities carried in the flue gas will gradually adhere to the inner wall of the flue gas passage. If it is not cleaned for a long time, these impurities will continue to accumulate, causing the exhaust pipe to be blocked, thereby affecting the engine's power output and fuel economy.

[0027] For example, the drive assembly 20 uses the airflow dynamics of the flue gas as the driving force. When the flue gas flows through the drive assembly 20 at a certain flow rate, the flue gas impacts the force-bearing surface of the drive assembly 20, causing it to rotate around the first axis. The first axis is the rotational center axis of the drive assembly 20.

[0028] For example, the scraping assembly 30 rotates around the second axis under the drive of the drive assembly 20, and the drive assembly 20 and the scraping assembly 30 transmit power to each other through the transmission assembly 40. The second axis is the rotation center axis of the scraping assembly 30. When the scraping assembly 30 rotates, its scraper 31 moves in a circular motion along the inner wall of the flue gas passage to scrape off the impurities attached to the inner wall.

[0029] For example, the first rotating shaft and the second rotating shaft are set at an angle, that is, the rotation axis of the drive assembly 20 is not parallel to the rotation axis of the scraping assembly 30, and there is an angle between them. Thus, the drive assembly 20 and the scraping assembly 30 can be flexibly arranged according to the spatial layout and airflow direction in the flue gas channel to optimize the power transmission path.

[0030] In some embodiments, the first rotating shaft is perpendicular to the second rotating shaft, the rotation plane of the drive assembly 20 is perpendicular to the rotation plane of the scraping assembly 30, the drive assembly 20 can be arranged in the position most favorable for airflow impact, and the scraping assembly 30 rotates and scrapes along the circumference of the flue gas passage, and the two do not interfere with each other.

[0031] It is understood that the self-cleaning exhaust pipe of this embodiment is provided with a drive component 20 and a scraping component 30. The drive component 20 is driven to rotate by the kinetic energy of the flue gas flow, and then the power is transmitted to the scraping component 30, so that the scraping component 30 rotates circumferentially along the inner wall of the flue gas passage. This achieves automatic scraping of impurities on the inner wall of the flue gas passage without the need for an external power source. It can complete self-cleaning by relying only on the energy of the flue gas discharged from the engine, which solves the technical problem of easy carbon accumulation on the inner wall of the exhaust pipe in the prior art and the need for regular manual cleaning.

[0032] like Figure 2 and Figure 3 As shown, in some embodiments, the drive assembly 20 includes a first drive shaft 22 and a plurality of fan blades 21 connected to the first drive shaft 22. The first shaft is the axis of the first drive shaft 22, and the first drive shaft 22 is parallel to the radial direction of the tube body 10.

[0033] For example, the first drive shaft 22 is the rotational center component of the drive assembly 20, and the fan blade 21 is fixedly connected to the outer periphery of the first drive shaft 22 and rotates together with the first drive shaft 22. For example, the fan blade 21 can be made of thin metal sheet or high-temperature resistant engineering plastic, and has a certain torsion angle and curvature to generate driving torque under the impact of flue gas.

[0034] For example, multiple fan blades 21 are evenly arranged circumferentially along the first drive shaft 22, forming a structure similar to a fan or turbine. For example, the number of fan blades 21 can be determined according to the diameter of the tube body 10 and the driving requirements; for example, three, four, or six fan blades 21 can be provided. The even arrangement ensures that the fan blades 21 are subjected to balanced forces in the circumferential direction, which is beneficial to the smooth rotation of the first drive shaft 22. For example, the windward and leeward sides of the fan blades 21 have different curvatures. When the flue gas impacts the windward side, a pressure difference is generated, driving the fan blades 21 to rotate around the first drive shaft.

[0035] Understandably, the first drive shaft 22 is parallel to the radial direction of the tube body 10, so that the fan blade 21 can be exposed to the flue gas flow path to the maximum extent. When the flue gas flows along the axial direction of the tube body 10, it directly impacts the surface of the fan blade 21, converting the kinetic energy of the airflow into the rotational mechanical energy of the fan blade 21.

[0036] In some embodiments, the scraping assembly 30 includes: a second drive shaft 32 and a plurality of scraping strips 31 connected to the second drive shaft 32, the second rotating shaft being the axis of the second drive shaft 32, and the plurality of scraping strips 31 and the second drive shaft 32 being parallel to the axial direction of the tube body 10; the second drive shaft 32 is connected to the first drive shaft 22 in a driving connection.

[0037] For example, the second drive shaft 32 is the central rotating component of the scraping assembly 30, and the scraper 31 is fixedly connected to the outer periphery of the second drive shaft 32 and rotates together with the second drive shaft 32. For example, the scraping part 311 of the scraper 31 can be made of a material with a certain degree of flexibility and wear resistance, such as rubber, polyurethane or soft plastic, to avoid damaging the inner wall of the tube 10 during the scraping process.

[0038] For example, multiple scraper blades 31 are evenly arranged circumferentially along the second drive shaft 32. The number of scraper blades 31 can be determined according to the diameter of the tube body 10 and the scraping requirements, such as setting two, three, or four sets of scraper blades 31. The even arrangement of multiple scraper blades 31 circumferentially along the second drive shaft 32 ensures that the scraping force of the scraper blades 31 on the inner wall of the tube body 10 is uniform, which is beneficial to improving the scraping effect and rotational stability.

[0039] It is understandable that multiple scraper blades 31 and the second drive shaft 32 are parallel to the axial direction of the tube body 10, that is, the extension direction of the scraper blades 31 is consistent with the axial direction of the tube body 10, and the rotation plane of the scraper blades 31 is perpendicular to the axial direction of the tube body 10, so that the scraper blades 31 continuously scrape the inner wall of the tube body 10 during rotation.

[0040] In some embodiments, the plurality of scraper blades 31 are divided into two groups, and the two groups of scraper blades 31 are respectively disposed at both ends of the second drive shaft 32; the two groups of scraper blades 31 are staggered in the circumferential direction; soft brushes are respectively provided at the close ends of the two groups of scraper blades 31; along the axial direction, the soft brushes of the scraper blades 31 located in different groups have overlapping portions.

[0041] For example, multiple scraper blades 31 are divided into two groups, with each group positioned at one end of the second drive shaft 32. One group of scraper blades 31 is installed at the end of the second drive shaft 32 closest to the air inlet, and the other group is installed at the end of the second drive shaft 32 closest to the air outlet. Each group of scraper blades 31 contains several blades 31, evenly distributed circumferentially along the second drive shaft 32. The two groups of scraper blades 31 are spaced a certain distance axially, each responsible for scraping the pipe wall of different axial regions of the pipe body 10.

[0042] For example, the two sets of scraper blades 31 are staggered circumferentially, meaning their installation positions are offset from each other in the circumferential direction. For instance, if each set has three scraper blades 31 evenly distributed, one set of blades 31 can have position angles of 0°, 120°, and 240°, while the other set can have position angles of 60°, 180°, and 300°. Understandably, this staggered distribution allows the scraping trajectories of the two sets of blades 31 to complement each other circumferentially, covering more circumferential angles and reducing blind spots.

[0043] For example, soft brushes are provided at the proximal ends of the two sets of scraper blades 31, that is, a soft brush is provided at one end of each set of scraper blades 31 facing the other set of scraper blades 31 (i.e., the end near the middle of the second drive shaft 32). For example, the soft brushes are made of soft bristle material, such as nylon filaments or animal hair, and have a certain degree of flexibility and elasticity.

[0044] For example, along the axial direction, the soft brushes of the scraper strips 31 in different groups have overlapping portions, that is, the ends of the soft brushes of one group of scraper strips 31 overlap with the ends of the soft brushes of another group of scraper strips 31 in the axial direction, so that the axial gap that originally existed between the two groups of scraper strips 31 is filled by the soft brushes. During rotation, the soft brushes can clean the pipe wall area between the two groups of scraper strips 31, ensuring that the pipe wall in the entire axial range of the pipe body 10 can be effectively scraped.

[0045] Understandably, this embodiment divides the scraper strips 31 into two groups and distributes them in a staggered manner, so that the scraping trajectories of the two groups of scraper strips 31 are complementary in the circumferential direction, thereby improving the scraping coverage. At the same time, by setting soft brushes with overlapping parts at the near ends of the two groups of scraper strips 31, the axial gap between the two groups of scraper strips 31 is filled, eliminating scraping blind spots and achieving all-round cleaning of the inner wall of the tube body 10. This ensures that the inner wall of the entire length of the tube body 10 can be effectively scraped, avoiding the problem of local carbon buildup caused by insufficient axial coverage of the scraper strips 31.

[0046] like Figures 2-4 As shown, in some embodiments, the self-cleaning exhaust pipe further includes a transmission assembly 40, which includes a first bevel gear 41 and a second bevel gear 42 meshing with each other. The first bevel gear 41 is connected to the first transmission shaft 22, and the second bevel gear 42 is connected to the second bevel gear 42. The self-cleaning mechanism also includes a sealing box 50, with the transmission assembly 40 disposed inside the sealing box 50, and the drive assembly 20 and the scraping assembly 30 disposed outside the sealing box 50.

[0047] For example, the sealing box 50 is fixedly connected to the pipe body 10, for example, by welding or bolting to the pipe body 10 via mounting post 51. For example, the first drive shaft 22 and the second drive shaft 32 are rotatably passed through different side walls of the sealing box 50 via sealed bearings, respectively. One end of the first drive shaft 22 extends out of the outer side of the sealing box 50 and is connected to the fan blade 21, while the other end of the first drive shaft 22 is located inside the sealing box 50 and is fixedly connected to the first bevel gear 41; both ends of the second drive shaft 32 extend out of the outer side of the sealing box 50 and are connected to the scraper 31, while the middle part of the second drive shaft 32 is located inside the sealing box 50 and is fixedly connected to the second bevel gear 42.

[0048] For example, the axes of the first bevel gear 41 and the second bevel gear 42 are perpendicular to each other. The first bevel gear 41 rotates with the first drive shaft 22, and drives the second bevel gear 42 to rotate through meshing, thereby driving the second drive shaft 32 and the scraper 31 to rotate.

[0049] It is understood that in this embodiment, the transmission component 40 is encapsulated within the sealed box 50, isolating it from the flue gas environment in the flue gas channel. This effectively prevents carbon soot particles and corrosive substances in the flue gas from entering the transmission component 40, avoiding wear and jamming of the bevel gear and extending the service life of the transmission component 40. Meanwhile, the drive component 20 and the scraping component 30 are both located outside the sealed box 50, in different areas of the flue gas channel, and each performs the drive and scraping functions respectively.

[0050] like Figure 2 and Figure 3 As shown, in some embodiments, the sealing box 50 is located in the flue gas passage and divides the flue gas passage into at least two channels at its location, so that the flue gas can only flow through the channel provided with the drive assembly 20.

[0051] For example, a seal is formed between the outer periphery of the sealing box 50 and part of the inner wall of the pipe body 10, dividing the flue gas passage into two independent flow channels at the location of the sealing box 50. A drive assembly 20 is provided in each of the two flow channels. After the flue gas enters from the inlet, it is diverted into the two flow channels, impacting the blades 21 of the two sets of drive assemblies 20 respectively, thereby ensuring that all or most of the flue gas impacts the blades 21 of the drive assembly 20, improving drive efficiency.

[0052] Understandably, in this embodiment, the flue gas passage is separated by the sealing box 50, forcing all the flue gas to flow through the flow channel where the drive component 20 is located. This allows the drive component 20 to fully utilize the kinetic energy of the flue gas flow, improving energy conversion efficiency. Simultaneously, this separation design also prevents the flue gas from bypassing the drive component 20 and flowing directly through it, which could lead to insufficient driving force in the drive component 20. This ensures that the self-cleaning component receives sufficient rotational driving force under various operating conditions.

[0053] In some embodiments, the drive assembly 20 is provided in two sets, and the two sets of drive assemblies 20 are symmetrically arranged on opposite sides of the sealing box 50.

[0054] For example, a set of drive components 20 are respectively provided on opposite sides of the sealing box 50. Each set of drive components 20 includes a first drive shaft 22, a fan blade 21, and a first bevel gear 41. Both first bevel gears 41 mesh with second bevel gears 42. The two sets of drive components 20 are arranged symmetrically, and the fan blades 21 are located on both sides of the sealing box 50, both exposed in the flue gas flow path.

[0055] It is understandable that this embodiment increases the total number of fan blades 21 and the total frontal area by setting two sets of symmetrical drive components 20, thereby generating a larger driving torque under the same flue gas flow rate and velocity, and driving the scraping component 30 to rotate more reliably. At the same time, the symmetrical arrangement makes the driving torque of the two sets of drive components 20 on the second transmission shaft 32 mutually balanced, reducing the unilateral force on the second transmission shaft 32, which is beneficial to improving the smoothness of rotation and the service life of the transmission component 40.

[0056] like Figure 1 and Figure 5 As shown, in some embodiments, the self-cleaning exhaust pipe also includes a flushing assembly 60 in the same number as the scraper 31. The flushing assembly 60 includes an inlet pipe 61, a mounting box 62, a nozzle 63, and a protective net 64. The mounting box 62 is embedded in the pipe body 10 and has an opening facing the flue gas passage. The circumferential width of the opening is greater than that of the protective net 64, which is disposed in the opening. The inlet pipe 61 is connected to the input end of the nozzle 63. The nozzle 63 is located inside the mounting box 62, and the output end of the nozzle 63 faces the protective net 64.

[0057] For example, the rinsing assembly 60 is used to rinse the scraper 31 when it rotates to a position directly opposite the opening of the mounting box 62, removing oil and impurities adhering to the surface of the scraper 31, thus keeping the scraper 31 clean and efficient for wiping. For example, the number of rinsing assemblies 60 is the same as the number of scraper 31s, with one rinsing assembly 60 corresponding to each scraper 31, ensuring that each scraper 31 is rinsed once during one rotation.

[0058] For example, one end of the inlet pipe 61 is connected to the fluid supply system of the vehicle or an external device, such as the vehicle's windshield washer fluid reservoir or a dedicated cleaning fluid supply device, and the other end of the inlet pipe 61 is connected to the collection chamber inside the mounting box 62. For example, the fluid supply system can be manually controlled (e.g., the driver presses the washer button) or automatically controlled (e.g., periodic automatic spraying or automatic triggering based on the degree of contamination of the wiper blade 31).

[0059] For example, the mounting box 62 is embedded inside the side wall of the pipe body 10. The interior of the mounting box 62 may include a liquid collection chamber and a spray chamber. The liquid collection chamber is connected to the liquid inlet pipe 61 and is used to temporarily store the cleaning fluid. The nozzle 63 is disposed in the spray chamber, with its input end connected to the liquid collection chamber and its output end facing the protective net 64. For example, multiple nozzles 63 may be provided and arranged along the axial direction of the pipe body 10 to expand the rinsing coverage and ensure that all parts of the scraper 31 along the axial direction can be rinsed.

[0060] For example, a protective net 64 is disposed at the opening of the mounting box 62 to prevent large particulate impurities in the flue gas from entering the interior of the mounting box 62, thus avoiding clogging of the nozzle 63 or contamination of the liquid collection chamber. For example, the protective net 64 may be made of high-temperature resistant and corrosion-resistant metal wire mesh, with a mesh size large enough to allow cleaning fluid to pass through while effectively intercepting impurities.

[0061] It is understood that, in this embodiment, by setting up the rinsing component 60, when the scraper 31 rotates to the opening position of the mounting box 62, the cleaning liquid sprayed by the nozzle 63 passes through the protective net 64 and impacts the surface of the scraper 31, washing away the oil and impurities attached to the scraper 31. This ensures that the scraper 31 can be cleaned when it rotates to the corresponding position of the rinsing component 60, preventing the scraper 31 from losing its scraping ability due to excessive oil, thereby ensuring the long-term effective operation of the self-cleaning component.

[0062] It should be explained that the rinsing component 60 can rinse the scraper 31 either during the rotation of the scraper component 30 or after the scraper component 30 stops rotating. If the scraper 31 is rinsed during the rotation of the scraper component 30, the nozzle 63 needs to complete the spraying at the instant the scraper 31 rotates rapidly, which requires a high response speed and control precision from the nozzle 63. Furthermore, the contact time between the cleaning fluid and the scraper 31 is extremely short, and the rinsing effect may be insufficient. At the same time, the cleaning fluid sprayed during rotation may be thrown off the surface of the scraper 31 by centrifugal force, resulting in waste of cleaning fluid. If the squeegee 31 is rinsed after the squeegee assembly 30 stops rotating, the squeegee 31 will be stationary in the position directly opposite the nozzle 63. The nozzle 63 will have sufficient time to continuously spray the squeegee 31, and the cleaning fluid can fully wet and soften the oil on the surface of the squeegee 31, resulting in a better rinsing effect. At the same time, the control logic for rinsing after stopping is relatively simple, without the need for complex timing control or precise tracking of the position of the squeegee 31 during rotation, making it easy to implement and operate.

[0063] In some embodiments, the self-cleaning exhaust pipe further includes an elastic limiting component, which includes an installation cavity formed in the pipe body 10 and communicating with the flue gas passage, and an elastic member and a stop member disposed in the installation cavity. The stop extends into the flue gas channel under the elastic force of the elastic element to limit the scraping assembly 30 to a position directly opposite the protective net 64; the stop overcomes the elastic force of the elastic element and exits the flue gas channel under the action of the flue gas.

[0064] For example, the elastic limiting component is used to temporarily limit the scraper 31 to the position when it rotates to the position directly opposite the protective net 64 of the flushing component 60, so that the nozzle 63 has enough time to flush the scraper 31; after flushing, when the flue gas flow increases, the stop automatically retracts, releasing the limitation on the scraper 31 and allowing the scraper 31 to resume rotation.

[0065] For example, the flue gas flowing from the inlet to the outlet partially enters the mounting cavity during its flow. The flue gas creates pressure within the mounting cavity, acting on the end of the stop member away from the flue gas passage. When the flue gas flow rate is low, the flue gas pressure within the mounting cavity is low and insufficient to overcome the elastic force of the elastic element. At this time, the stop member remains extended into the flue gas passage under the elastic force of the elastic element. When the scraper blade 31 rotates to contact the stop member, the stop member holds the scraper blade 31 in place, keeping it in a position directly opposite the protective net 64, and the nozzle 63 washes the scraper blade 31. When the flue gas flow rate increases, the flue gas pressure within the mounting cavity rises, pushing the stop member to overcome the elastic force of the elastic element and retract into the mounting cavity. The stop member exits the flue gas passage, releasing the restriction on the scraper blade 31, and the scraper blade 31 resumes rotation.

[0066] For example, the elastic element can be a coil spring, a leaf spring, or an elastic rubber block, and its elastic force needs to be calibrated according to the flue gas pressure range and limiting requirements. For example, the stop can be made of wear-resistant metal material, and its end extending into the flue gas channel is provided with a bevel or arc surface so that the scraper 31 can smoothly push the stop aside during rotation and avoid jamming.

[0067] It is understood that this embodiment achieves automatic positioning and release of the scraper 31 in the rinsing position by setting an elastic limiting component and utilizing the dynamic balance between the elastic force of the elastic element and the flue gas pressure. When the flue gas flow rate is low, the scraper 31 is limited to the rinsing position for thorough rinsing; when the flue gas flow rate increases, the stop component automatically retracts, and the scraper 31 resumes rotation for rinsing.

[0068] like Figure 3 and Figure 6 As shown, in some embodiments, the scraper 31 includes a scraper portion 311, an elastic portion 312, and a mounting portion 313. The mounting portion 313 is fixedly connected to the second drive shaft 32. The scraper portion 311 is disposed on the side of the mounting portion 313 facing the inner wall of the flue gas passage and abuts against the inner wall of the flue gas passage. The elastic portion 312 is disposed between the scraper portion 311 and the mounting portion 313.

[0069] For example, the scraper part 311 is the portion of the scraper strip 31 that directly contacts the inner wall of the flue gas passage, and is used to scrape the inner wall during rotation. For example, the scraper part 311 can be made of a material with a certain degree of flexibility and wear resistance, such as rubber, polyurethane, or soft plastic, to avoid damaging the inner wall of the pipe body 10 during scraping. For example, the edge of the scraper part 311 that contacts the inner wall can be serrated, resulting in better scraping effect and more thorough cleaning.

[0070] For example, an elastic part 312 is disposed between the scraper part 311 and the mounting part 313 to provide elastic preload to the scraper part 311, ensuring that the scraper part 311 remains in close contact with the inner wall of the flue gas passage during rotation. For example, the elastic part 312 can be in the form of a spring, an elastic rubber block, or an elastic metal sheet. It is understood that since the inner wall of the flue gas passage may have minor unevenness, or local protrusions may occur due to carbon buildup during use, the presence of the elastic part 312 allows the scraper part 311 to adaptively conform to the inner wall surface, maintaining good contact pressure even when encountering uneven areas, thereby improving the scraping effect. Simultaneously, the buffering effect of the elastic part 312 can also reduce the rigid impact between the scraper part 311 and the inner wall, reducing wear and noise.

[0071] For example, the mounting part 313 is the portion of the scraper 31 that is fixedly connected to the second drive shaft 32, and is used to mount the scraper 31 as a whole onto the second drive shaft 32. For example, the mounting part 313 may be made of rigid plastic or metal to ensure connection strength.

[0072] For example, the scraping assembly 30 also includes multiple connecting rods 33, which connect the mounting portion 313 and the second drive shaft 32. For example, one end of each connecting rod 33 is fixedly connected to the second drive shaft 32, and the other end is fixedly connected to the mounting portion 313. For example, the length of each connecting rod 33 determines the radial distance between the scraper blade 31 and the second drive shaft 32; by adjusting the length of the connecting rod 33, the scraping radius of the scraper blade 31 can be changed to accommodate tubes 10 with different inner diameters. For example, the multiple connecting rods 33 are evenly distributed circumferentially along the second drive shaft 32, providing stable support for the scraper blade 31.

[0073] Understandably, this embodiment, through its three-section structural design of the scraping part 311, the elastic part 312, and the mounting part 313, ensures that the scraper 31 maintains close contact with the inner wall of the flue gas passage during the scraping process, guaranteeing the scraping effect even when the inner wall of the pipe body 10 is uneven or has uneven carbon deposits. The adaptive adjustment function of the elastic part 312 effectively compensates for manufacturing tolerances and deformation during use of the inner wall of the pipe body 10, improving the reliability and consistency of scraping.

[0074] In some embodiments, the scraper 31 further includes a filter screen connected between the scraper portion 311 and the mounting portion 313, and an elastic portion 312 is disposed within the space formed by the scraper portion 311, the mounting portion 313 and the filter screen.

[0075] For example, the filter screen is made of high-temperature resistant and corrosion-resistant metal wire mesh or nylon mesh, and its mesh size is smaller than the particle size of carbon soot particles in the flue gas, which can effectively block impurities from entering the space where the elastic part 312 is located. For example, the filter screen wraps around the elastic part 312, isolating the elastic part 312 from the external flue gas environment. At the same time, the filter screen has a certain degree of flexibility, which will not hinder the expansion and contraction of the elastic part 312, nor affect the floating of the scraper part 311 relative to the mounting part 313.

[0076] It is understood that in this embodiment, by setting a filter screen to encapsulate the elastic part 312 within the closed space formed by the scraper part 311, the mounting part 313 and the filter screen, the carbon soot particles and impurities in the flue gas are effectively prevented from entering the interior of the elastic part 312. This avoids the elastic part 312 from getting stuck, failing or losing its elasticity due to the intrusion of impurities, thereby extending the service life of the scraper 31 and ensuring the scraping effect and reliability of the scraper 31 during long-term use.

[0077] like Figure 2 and Figure 7 As shown, in some embodiments, the self-cleaning exhaust pipe also includes a collection box 70 embedded in the pipe body 10, the collection box 70 having a collection port facing the flue gas passage.

[0078] For example, the collection box 70 is axially movably connected to the tube body 10, for example, by means of a sliding groove and a slider to achieve a pull-out connection. The collection box 70 can be detached from the tube body 10 for easy periodic cleaning of the impurities collected therein.

[0079] For example, the collection box 70 is embedded on the lower side of the tube body 10, that is, at the lowest position of the bottom of the tube body 10. Impurities scraped off from the inner wall by the scraper 31 fall naturally under gravity and into the collection box 70 at the bottom of the tube body 10. For example, the collection port is flush with or slightly recessed from the inner wall of the tube body 10 to avoid interfering with the rotation of the scraper 31. For example, a drain port may be provided at the bottom of the collection box 70 for discharging impurities and accumulated liquid during cleaning.

[0080] It is understood that, by setting up the collection box 70, this embodiment collects the impurities removed from the inner wall by the scraper 31, thus preventing impurities from accumulating at the bottom of the pipe body 10 or being re-entrained by the flue gas. The detachable design of the collection box 70 makes cleaning impurities simple and convenient; it eliminates the need to disassemble the entire exhaust pipe, requiring only the collection box 70 to be pulled out for emptying and cleaning, further reducing maintenance difficulty and costs.

[0081] The present invention provides an automobile, including an engine and a self-cleaning exhaust pipe, the self-cleaning exhaust pipe being connected to the exhaust end of the engine.

[0082] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0083] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0084] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0085] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0086] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] The above examples are merely illustrative of the technical content of the present invention to facilitate reader understanding, but do not imply that the implementation of the present invention is limited thereto. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A self-cleaning exhaust pipe, characterized in that, include: The pipe body has a flue gas passage, and an inlet and an outlet connected to the flue gas passage; A drive assembly is rotatably disposed within the flue gas passage, and the drive assembly rotates about a first axis under the action of flue gas flowing from the inlet to the outlet; A scraping assembly is rotatably disposed in the flue gas channel. The scraping assembly rotates around a second rotating shaft under the drive of the driving assembly, and the scraper of the scraping assembly abuts against the inner wall of the flue gas channel to scrape off impurities adhering to the inner wall of the flue gas channel during rotation. The second rotating shaft is set at an angle to the first rotating shaft.

2. The self-cleaning exhaust pipe according to claim 1, characterized in that, The drive assembly includes a first drive shaft and a plurality of fan blades connected to the first drive shaft. The first shaft is the axis of the first drive shaft, and the first drive shaft is parallel to the radial direction of the tube body.

3. The self-cleaning exhaust pipe according to claim 2, characterized in that, The scraping assembly includes: a second drive shaft and a plurality of scraping blades connected to the second drive shaft, the second drive shaft being the axis of the second drive shaft, and the plurality of scraping blades and the second drive shaft being parallel to the axial direction of the tube body; the second drive shaft is drivingly connected to the first drive shaft.

4. The self-cleaning exhaust pipe according to claim 3, characterized in that, The multiple scraper blades are divided into two groups, and the two groups of scraper blades are respectively disposed at both ends of the second drive shaft; the two groups of scraper blades are staggered in the circumferential direction; soft brushes are respectively extended from the near ends of the two groups of scraper blades; along the axial direction, the soft brushes of the scraper blades located in different groups have overlapping portions.

5. The self-cleaning exhaust pipe according to claim 3, characterized in that, The self-cleaning exhaust pipe also includes a transmission assembly, which includes a meshing first bevel gear and a second bevel gear, wherein the first bevel gear is connected to the first transmission shaft and the second bevel gear is connected to the second bevel gear. The self-cleaning mechanism also includes a sealing box, the transmission component is disposed inside the sealing box, and the drive component and the scraping component are both disposed outside the sealing box.

6. The self-cleaning exhaust pipe according to any one of claims 2-5, characterized in that, The self-cleaning exhaust pipe also includes a flushing assembly with the same number of wiper blades. The flushing assembly includes an inlet pipe, a mounting box, a nozzle, and a protective net. The mounting box is embedded in the pipe body and has an opening facing the flue gas passage. The circumferential width of the opening is greater than the circumferential width of the wiper blades. The protective net is disposed in the opening. The inlet pipe is connected to the input end of the nozzle. The nozzle is located inside the mounting box, and the output end of the nozzle faces the protective net.

7. The self-cleaning exhaust pipe according to claim 6, characterized in that, The self-cleaning exhaust pipe also includes an elastic limiting component, which includes an installation cavity formed in the pipe body and communicating with the flue gas passage, and an elastic element and a stop element disposed in the installation cavity. The stop member extends into the flue gas channel under the elastic force of the elastic member to limit the scraping assembly to a position directly opposite the protective net; the stop member overcomes the elastic force of the elastic member and exits the flue gas channel under the action of the flue gas.

8. The self-cleaning exhaust pipe according to any one of claims 1-5, characterized in that, The scraper includes a scraping part, an elastic part, and a mounting part. The mounting part is fixedly connected to the second drive shaft. The scraping part is disposed on the side of the mounting part facing the inner wall of the flue gas passage and abuts against the inner wall of the flue gas passage. The elastic part is disposed between the scraping part and the mounting part.

9. The self-cleaning exhaust pipe according to any one of claims 1-5, characterized in that, The self-cleaning exhaust pipe also includes a collection box embedded in the pipe body, the collection box having a collection port facing the flue gas passage.

10. A car, characterized in that, The invention includes an engine and a self-cleaning exhaust pipe as described in any one of claims 1-9, the self-cleaning exhaust pipe being connected to the exhaust end of the engine.

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