Tail gas purification device

Abstract

The utility model discloses a tail gas purifying device which comprises a first filtering assembly, the first filtering assembly comprises a filtering box, a second filtering assembly and a third filtering assembly, a containing cavity is defined in the filtering box, and an air inlet and an air outlet which are communicated with the containing cavity are formed in the filtering box; the filtering piece is arranged in the containing cavity and located between the air inlet and the air outlet; the cleaning mechanism comprises fan blades, a rotating shaft and cleaning parts, the rotating shaft is rotatably arranged in the filter box, the fan blades are fixed to the rotating shaft and located on the side, facing the air inlet, of the filter part, the cleaning parts are fixed to the rotating shaft, the cleaning parts and the fan blades are arranged in the axial direction of the rotating shaft, and the cleaning parts extend in the radial direction of the rotating shaft; the cleaning part is in contact with the surface of one side, facing the air inlet, of the filtering part to clean the filtering part. According to the tail gas purification device disclosed by the utility model, the cleaning mechanism is arranged, so that the filtering piece can be cleaned, the failure probability of the filtering piece is reduced, and the reliability of the tail gas purification device in the working process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an exhaust gas purification device. Background Art

[0002] A smart car is a comprehensive system integrating environmental perception, decision-making, and multi-level assisted driving. It utilizes computers, modern sensing, information fusion, communications, artificial intelligence, and automatic control technologies, making it a typical high-tech complex. Like traditional cars, smart cars also need to emit exhaust gases. Vehicle exhaust contains a high concentration of particulate matter and harmful gases, requiring exhaust purification devices to purify exhaust gases before discharge to avoid direct pollution. Exhaust purification devices are equipped with filters. Over time, impurities accumulate on the filters, potentially clogging them and rendering them ineffective. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an exhaust gas purification device with higher reliability.

[0004] According to the exhaust gas purification device of the present utility model, it includes a first filter assembly, the first filter assembly includes: a filter box, a accommodating chamber is defined in the filter box, and an air inlet and an air outlet connected to the accommodating chamber are formed on the filter box; a filter element, the filter element is arranged in the accommodating chamber and is located between the air inlet and the air outlet, the filter element is a filter plate, and a plurality of filter holes are formed on the filter plate; a cleaning mechanism, the cleaning mechanism includes a fan blade, a rotating shaft and a cleaning element, the rotating shaft is rotatably arranged in the filter box, the fan blade is fixed on the rotating shaft and is located on the side of the filter element facing the air inlet, the cleaning element is fixed on the rotating shaft and is arranged in the axial direction of the rotating shaft with the fan blade, the cleaning element extends radially along the rotating shaft, and the cleaning element contacts the surface of the filter element on one side facing the air inlet to clean the filter element.

[0005] According to the exhaust gas purification device of the present invention, the cleaning mechanism is provided to clean the filter element, thereby reducing the probability of filter element failure and improving the reliability of the exhaust gas purification device during operation.

[0006] According to some embodiments of the present invention, the cleaning member is a scraper bar, and there are multiple scrapers, which are arranged at intervals along the circumference of the rotating shaft.

[0007] According to some embodiments of the present invention, the scraper strip includes a first section, a second section, and a third section, the first section extends radially along the rotating shaft, and one end is connected to the rotating shaft, the second section is connected to the other end of the first section, and extends axially along the rotating shaft toward the filter element, the third section is connected to one end of the second section close to the filter element, and extends radially outward along the rotating shaft, and the third section is configured to contact the filter element.

[0008] According to some embodiments of the present invention, a dust collecting port connected to the accommodating cavity is further formed on the filter box, and the dust collecting port is arranged on the lower side of the cleaning member. The first filter assembly also includes: a collecting box, which is detachably connected to the lower side of the filter box, and a collecting cavity is defined in the collecting box. A collecting port connected to the collecting cavity is formed on the collecting box, and the collecting port is directly opposite to and connected to the dust collecting port in upper and lower directions.

[0009] According to some embodiments of the present invention, a fixing hole opening in a first direction is formed on the outer wall of the collecting box, and a fixing rod is provided on the filter box. The fixing rod is movable between a first position and a second position along the first direction. In the first position, one end of the fixing rod is engaged with the fixing hole to fix the collecting box to the filter box, and in the second position, the fixing rod is disengaged from the fixing hole.

[0010] According to some embodiments of the present invention, a driving groove extending along a second direction is formed on the fixed rod, and the second direction is perpendicular to the first direction. A driving rod is also provided on the filter box, and a first axis and a second axis are connected to the side walls of the driving rod. The first axis and the second axis are arranged at intervals in the length direction of the driving rod. The first axis is rotatably connected to the filter box, and the second axis is engaged in the driving groove. The driving rod drives the fixed rod to move between the first position and the second position through the second axis. A first elastic member is provided on the first axis, and the first elastic member is connected between the driving rod and the filter box. The first elastic member is used to always drive the fixed rod to move to the first position.

[0011] According to some embodiments of the present invention, the filter box is further provided with a guide rail, the guide rail extends along the first direction, the fixing rod is provided with a guide portion, a guide hole is formed on the guide portion and passes through the guide portion along the first direction, and the guide portion can be slidably mounted on the guide rail through the guide hole.

[0012] According to some embodiments of the present invention, there are two fixing rods and two fixing holes, and the fixing rods and the fixing holes correspond one to one, and the two fixing holes are respectively provided on both side outer walls of the collection box in the first direction.

[0013] According to some embodiments of the present invention, the exhaust gas purification device also includes: a second filter assembly, the second filter assembly includes a particulate trap and a three-way catalytic converter, the three-way catalytic converter is connected in series between the particulate trap and the filter box, and the outlet end of the three-way catalytic converter is connected to the air inlet; and / or, a third filter assembly, the third filter assembly includes a purification liquid tank, an air inlet pipe and an air outlet pipe, the purification liquid tank is provided with purification liquid, one end of the air inlet pipe is connected to the air outlet, the other end of the air inlet pipe extends into the purification liquid, one end of the air outlet pipe extends into the cavity between the purification liquid and the purification liquid tank, and the other end of the air outlet pipe extends out of the purification liquid tank.

[0014] According to some embodiments of the present invention, the exhaust gas purification device further includes: a protective component, the protective component including a protective plate and a cover plate, the protective plate is arranged on the lower side of the first filter component, a through hole is formed on the protective plate, and the cover plate can be openably arranged at the through hole.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of an exhaust gas purification device according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the first filter assembly and the third filter assembly shown in ;

[0018] Figure 3 yes Figure 2 Schematic diagram of the filter element, cleaning mechanism and collection box described in;

[0019] Figure 4 yes Figure 1 A schematic diagram of the first filter assembly shown in ;

[0020] Figure 5 yes Figure 4 An enlarged view of point A shown in FIG;

[0021] Figure 6 yes Figure 1 A schematic diagram of another angle of the first filter assembly and the third filter assembly shown in FIG;

[0022] Figure 7 yes Figure 6 A schematic diagram of the third filter assembly shown in ;

[0023] Figure 8 yes Figure 1 Exploded view of the guard assembly shown in ;

[0024] Figure 9 yes Figure 8 Schematic diagram of the rotating shaft and the second torsion spring shown in .

[0025] Reference numerals:

[0026] 100. Exhaust gas purification device;

[0027] 10. First filter assembly;

[0028] 11. Filter box; 111. Accommodating chamber; 112. Air inlet; 113. Dust collection port; 12. Filter element; 13. Cleaning mechanism; 131. Fan blade; 132. Rotating shaft; 133. Cleaning element; 1331. First section; 1332. Second section; 1333. Third section; 14. Fixing rod; 141. Driving groove; 142. Guide portion; 143. Guide rod portion; 15. Driving rod; 151. First shaft; 152. First elastic member; 16. Guide rail; 17. Collection box; 171. Collection port; 172. Fixing hole;

[0029] 20. Second filter assembly; 21. Particulate trap; 211. First air duct; 22. Three-way catalytic converter; 221. Second air duct; 222. Third air duct;

[0030] 30. Third filter assembly; 31. Purified liquid tank; 32. Air inlet pipe; 33. Air outlet pipe; 34. Manifold; 35. Fourth air guide pipe; 36. Liquid inlet pipe; 361. Sealing cover; 37. Liquid outlet pipe; 371. On / off valve;

[0031] 40. Muffler;

[0032] 50. Exhaust pipe;

[0033] 60. Protective assembly; 61. Protective plate; 611. Through hole; 612. Rotation hole; 62. Cover plate; 621. Rotation shaft; 622. Second torsion spring; 623. Handle;

[0034] 200. Engine exhaust pipe. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] Reference below Figures 1-9 An exhaust gas purification device 100 according to an embodiment of the present invention is described.

[0037] like Figure 1-Figure 3 As shown, the exhaust gas purification device 100 according to an embodiment of the present invention includes a first filter assembly 10 , and the first filter assembly 10 includes: a filter box 11 , a filter element 12 and a cleaning mechanism 13 .

[0038] Specifically, a accommodating chamber 111 is defined in the filter box 11, and an air inlet 112 and an air outlet connected to the accommodating chamber 111 are formed on the filter box 11. The filter element 12 is arranged in the accommodating chamber 111 and is located between the air inlet 112 and the air outlet. The cleaning mechanism 13 includes a fan blade 131, a rotating shaft 132 and a cleaning member 133. The rotating shaft 132 is rotatably arranged in the filter box 11, the fan blade 131 is fixed on the rotating shaft 132 and is located on the side of the filter element 12 facing the air inlet 112, the cleaning member 133 is fixed on the rotating shaft 132 and is arranged axially with the fan blade 131 on the rotating shaft 132, the cleaning member 133 extends radially along the rotating shaft 132, and the cleaning member 133 contacts the surface of the side of the filter element 12 facing the air inlet 112 to clean the filter element 12.

[0039] During vehicle operation, exhaust gas from the engine enters the filter box 11 through the air inlet 112, passes through the filter element 12, filters the exhaust gas, and then flows out of the filter box 11 through the air outlet. Simultaneously, the exhaust gas blows the fan blades 131, causing the fan blades 131 to rotate the rotating shaft 132, which in turn rotates the cleaning element 133, which cleans the surface of the filter element 12. This reduces the accumulation of impurities filtered from the exhaust gas by the filter element 12 on the surface of the filter element 12, thereby reducing the probability of impurities clogging the filter element 12 and causing it to fail, thereby improving the reliability of the exhaust gas purification device 100 during operation.

[0040] It can be understood that during the rotation process, the cleaning member 133 will generate a torque on the connection between the rotating shaft 132 and the filter element 12. By fixing the cleaning member 133 on the rotating shaft 132 and arranging it with the fan blades 131 in the axial direction of the rotating shaft 132, the force arm of the cleaning member 133 on the connection between the rotating shaft 132 and the filter element 12 can be shortened, thereby reducing the impact of the cleaning member 133 on the connection between the rotating shaft 132 and the filter element 12 during the cleaning process, and further improving the reliability of the exhaust gas purification device 100 during operation.

[0041] According to the exhaust gas purification device 100 of the embodiment of the present invention, the cleaning mechanism 13 is provided to clean the filter element 12, thereby reducing the probability of failure of the filter element 12 and improving the reliability of the exhaust gas purification device 100 during operation.

[0042] In some embodiments of the present invention, Figure 3 As shown, the cleaning member 133 is a scraper bar, and the number of scrapers can be multiple, for example, two, three, or four scrapers, and the multiple scrapers are arranged at intervals along the circumference of the rotating shaft 132. The scraper bar structure is relatively simple, which can further reduce production costs. Impurities are not easily accumulated on the scraper bar, which can reduce the frequency of scraper bar replacement during use and improve the user experience. Among them, by providing multiple scrapers, on the one hand, each scraper bar can clean the filter element 12, which can improve cleaning efficiency. On the other hand, it can make the force of the scraper bar on the rotating shaft 132 more evenly distributed, thereby improving the stability of the rotating shaft 132 during rotation.

[0043] In some embodiments of the present invention, Figure 3 As shown, the scraper includes a first section 1331, a second section 1332 and a third section 1333. The first section 1331 extends radially along the rotating shaft 132 and is connected to the rotating shaft 132 at one end. The second section 1332 is connected to the other end of the first section 1331 and extends axially toward the filter element 12 along the rotating shaft 132. The third section 1333 is connected to one end of the second section 1332 close to the filter element 12 and extends radially outward along the rotating shaft 132. The third section 1333 is configured to contact the filter element 12.

[0044] Thus, the scraper connected to the rotating shaft 132 can be brought into contact with the filter element 12. As the scraper is rotated, the third section 1333 contacts the filter element 12, thereby scraping away impurities on the filter element 12 and cleaning the filter element 12. During product design, parameters such as the size, shape, or relative angle of the first section 1331, the second section 1332, and the third section 1333 can be adjusted to meet various product design requirements.

[0045] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the filter element 12 is a filter plate having a plurality of filter holes formed thereon. Thus, the structure of the filter element 12 is relatively simple, which can reduce the difficulty of product design and production cost.

[0046] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the filter box 11 is also formed with a dust collecting port 113 connected to the accommodating chamber 111, and the dust collecting port 113 is arranged on the lower side of the cleaning member 133. The first filter assembly 10 also includes: a collecting box 17, the collecting box 17 is detachably connected to the lower side of the filter box 11, and a collecting chamber is defined in the collecting box 17. A collecting port 171 connected to the collecting chamber is formed on the collecting box 17, and the collecting port 171 is directly opposite to and connected to the dust collecting port 113 above and below.

[0047] During operation of the exhaust gas purification device 100, impurities removed from the filter element 12 by the cleaning member 133 fall from the dust collection port 113 through the collection port 171 into the collection chamber. When a large amount of impurities is contained in the collection box 17, the collection box 17 can be removed from the filter box 11 and the impurities in the collection box 17 can be cleaned. The collection box 17 can accommodate the impurities removed by the cleaning member 133, and the collection box 17 can be detachably connected to the filter box 11 to clean the collection box 17, thereby enabling the exhaust gas purification device 100 to operate normally.

[0048] In some embodiments of the present invention, Figure 3-Figure 5 As shown, a fixing hole 172 opening in a first direction is formed on the outer wall of the collecting box 17, and a fixing rod 14 is provided on the filter box 11. The fixing rod 14 is movable between a first position and a second position along the first direction. In the first position, one end of the fixing rod 14 is engaged in the fixing hole 172 to fix the collecting box 17 to the filter box 11. In the second position, the fixing rod 14 is disengaged from the fixing hole 172.

[0049] When it is necessary to clean the impurities in the collection box 17, the fixing rod 14 is moved from the first position to the second position, so that the fixing rod 14 is disengaged from the fixing hole 172, thereby releasing the fixing rod 14 from limiting the collection box 17, and then the collection box 17 can be removed for cleaning. After the collection box 17 is cleaned, the collection box 17 is placed in a suitable position, and the fixing rod 14 is moved from the second position to the first position, so that one end of the fixing rod 14 extends into the fixing hole 172 to fix the collection box 17, thereby achieving a detachable connection between the collection box 17 and the filter box 11.

[0050] In some embodiments of the present invention, Figure 4 and Figure 5As shown, a driving groove 141 extending along a second direction is formed on the fixed rod 14, and the second direction is perpendicular to the first direction. A driving rod 15 is also provided on the filter box 11, and a first shaft 151 and a second shaft are connected to the side wall of the driving rod 15. The first shaft 151 and the second shaft are arranged at intervals in the length direction of the driving rod 15. The first shaft 151 is rotatably connected to the filter box 11, and the second shaft is engaged in the driving groove 141. The driving rod 15 drives the fixed rod 14 to move between the first position and the second position through the second shaft.

[0051] When the driving rod 15 drives the second shaft to rotate, the second shaft will move in the driving groove 141. At the same time, the second shaft will generate a force on the inner wall of the driving groove 141, thereby driving the fixed rod 14 to move. In this way, the driving structure of the fixed rod 14 is relatively simple, which can further reduce the design difficulty and production cost.

[0052] Preferably, a guide rod portion 143 extending along the second direction is formed on the fixing rod 14 , and the driving slot 141 is formed on the guide rod portion 143 .

[0053] A first elastic member 152 is provided on the first shaft 151 and is connected between the drive rod 15 and the filter box 11. The first elastic member 152 is configured to constantly drive the fixing rod 14 to the first position. In other words, the first elastic member 152 constantly applies a force from the second position toward the first position to the fixing member. Thus, during the installation of the collection box 17 onto the filter box 11, the first elastic member 152 can drive the fixing rod 14 toward the fixing hole 172. Once the fixing rod 14 is inserted into the fixing hole 172, the first elastic member 152 secures the fixing rod 14 in the fixing hole 172, thereby improving the reliability of the fixing rod 14 within the fixing hole 172.

[0054] Preferably, the first elastic member 152 is a first torsion spring, which is sleeved on the first shaft 151, with one end of the first torsion spring connected to the second shaft and the other end of the first torsion spring connected to the filter box 11. The first torsion spring is low in cost and easy to arrange. When the driving rod 15 drives the fixed rod 14 to move from the first position to the second position, the driving rod 15 can compress the first torsion spring. When the driving rod 15 drives the fixed rod 14 to move from the second position to the first position, the first torsion spring gradually releases and generates a force on the driving rod 15, thereby driving the fixed rod 14 to reset.

[0055] In some embodiments of the present invention, Figure 3 、 Figure 4 and Figure 5As shown, the filter box 11 is also provided with a guide rail 16, which extends along the first direction. The fixed rod 14 is provided with a guide portion 142, and the guide portion 142 is formed with a guide hole that penetrates the guide portion 142 along the first direction. The guide portion 142 can be slidably mounted on the guide rail 16 through the guide hole.

[0056] During the movement of the fixed rod 14, the guide hole and the guide slide rail 16 can cooperate to limit the fixed rod 14, so that the guide rod can move between the first position and the second position along the first direction. Among them, the guide slide rail 16 and the guide hole cooperate to achieve limitation, occupying a smaller layout space, which can reduce the design difficulty, and using less production materials, which can reduce production costs.

[0057] In some embodiments of the present invention, Figure 4 As shown, there are two fixing rods 14 and two fixing holes 172, and the fixing rods 14 and the fixing holes 172 correspond one to one. The two fixing holes 172 are respectively provided on the outer walls of the collection box 17 on both sides in the first direction. In this way, the two fixing rods 14 can fix the collection box 17 on the outer walls of the collection box 17 on both sides in the first direction, thereby improving the reliability of the collection box 17 on the filter box 11.

[0058] In some embodiments of the present invention, Figure 1 As shown, the exhaust gas purification device 100 also includes: a second filter component 20, the second filter component 20 includes a particulate trap 21 and a three-way catalytic converter 22, the three-way catalytic converter 22 is connected in series between the particulate trap 21 and the filter box 11, and the outlet end of the three-way catalytic converter 22 is connected to the air inlet 112. The particulate filter 21 is connected to the engine exhaust pipe 200 via a first air duct 211. The first air duct 211 and the engine exhaust pipe 200 are connected via a flange. The particulate filter 21 is connected to the three-way catalytic converter 22 via a second air duct 221. The three-way catalytic converter 22 is connected to the air inlet 112 of the filter box 11 via a third air duct 222. During vehicle operation, exhaust gas discharged from the engine exhaust pipe 200 enters the particulate filter 21 through the first air duct 211. After being filtered by the particulate filter 21, the exhaust gas passes through the second air duct 221 and enters the three-way catalytic converter 22. The three-way catalytic converter 22 further purifies the exhaust gas. Exhaust gas flowing out of the outlet of the three-way catalytic converter 22 then passes through the third air duct 222 and enters the filter box 11. The provision of the particulate filter 21 and the three-way catalytic converter 22 improves exhaust gas treatment.

[0059] In some embodiments of the present invention, Figure 1 、 Figure 6 and Figure 7As shown, the exhaust gas purification device 100 also includes: a third filter component 30, the third filter component 30 includes a purification liquid tank 31, an air inlet pipe 32 and an air outlet pipe 33, the purification liquid tank 31 is provided with purification liquid, one end of the air inlet pipe 32 is connected to the air outlet, and the other end of the air inlet pipe 32 extends into the purification liquid, one end of the air outlet pipe 33 extends into the cavity between the purification liquid and the purification liquid tank 31, and the other end of the air outlet pipe 33 extends out of the purification liquid tank 31.

[0060] During the operation of the exhaust gas purification device 100, the exhaust gas flows out of the filter box 11 through the air outlet, then passes through the air inlet pipe 32 into the purification liquid, and the purification liquid further purifies the exhaust gas. Then, the purified exhaust gas flows out of the purification liquid and flows out of the filter box 11 through the air outlet pipe 33.

[0061] The exhaust gas purification device 100 further includes a muffler 40 and an exhaust pipe 50. The muffler 40 is connected to the end of the outlet pipe 33 extending from the purification liquid tank 31, and the exhaust pipe 50 is connected to the end of the muffler 40 away from the purification liquid tank 31. The muffler 40 can reduce the exhaust noise of the engine.

[0062] Preferably, there are multiple inlet pipes 32 and outlet pipes 33, and both the inlet pipes 32 and the outlet pipes 33 are curved pipes. A manifold 34 is also provided between the outlet pipe 33 and the muffler 40. The exhaust gas in the multiple outlet pipes 33 is converged through the manifold 34, and the manifold 34 is connected to the muffler 40 through the fourth air guide pipe 35.

[0063] In some embodiments of the present invention, Figure 2 、 Figure 6 and Figure 7 As shown, the upper side of the purified liquid tank 31 is provided with a liquid inlet pipe 36, which has a liquid inlet formed therein. The upper cover of the liquid inlet is provided with an openable sealing cap 361. The lower end of the purified liquid tank 31 is provided with a liquid outlet pipe 37, which has a liquid outlet formed therein. The outlet is provided with an on-off valve 371, which can open and close the outlet. When the purified liquid in the purified liquid tank 31 needs to be replaced, the on-off valve 371 is controlled to open the outlet to release the purified liquid. The on-off valve 371 is then closed, the sealing cap 361 on the liquid inlet is opened, an appropriate amount of purified liquid is added from the liquid inlet, and the sealing cap 361 is then replaced. In this manner, the purified liquid can be replaced.

[0064] A liquid level bar is also provided on the purification liquid tank 31 , so that during use, the amount of purification liquid can be judged by observing the relative position of the liquid level and the liquid level bar.

[0065] In some embodiments of the present invention, Figure 1 and Figure 8As shown, the exhaust gas purification device 100 also includes: a protective component 60, the protective component 60 includes a protective plate 61 and a cover plate 62, the protective plate 61 is arranged on the lower side of the first filter component 10, a through hole 611 is formed on the protective plate 61, and the cover plate 62 is openably arranged at the through hole 611.

[0066] Among them, the two ends of the protective plate 61 are respectively connected to the first air duct 211 and the exhaust pipe 50, and the through hole 611 is opposite to the collection box 17 and the purification liquid tank 31 up and down. When it is necessary to clean the impurities in the collection box 17 or release the purification liquid in the purification liquid tank 31, open the cover 62 in the through hole 611, and then operate the collection box 17 and the purification liquid tank 31 through the through hole 611. After the operation is completed, the cover 62 blocks the through hole 611, thereby facilitating the operation of the collection box 17 and the purification liquid tank 31.

[0067] By providing the protection component 60 , the first filter component 10 , the second filter component 20 and the third filter component 30 can be protected, thereby improving the reliability of the vehicle during operation.

[0068] In some embodiments of the present invention, Figure 8 and Figure 9 As shown, two opposite inner walls of the through hole 611 are provided with rotating holes 612, and the cover plate 62 is provided with a rotating shaft 621 corresponding to the rotating hole 612. A second torsion spring 622 is sleeved on the rotating shaft 621, and the rotating shaft 621 is fitted in the rotating hole 612. The two ends of the second torsion spring 622 are respectively connected to the rotating shaft 621 and the inner wall of the rotating hole 612. A handle 623 is also provided on the cover plate 62. When the cover plate 62 is opened, the operator uses the handle 623 to make the cover plate 62 open. 2 is rotated, and the cover plate 62 compresses the second torsion spring 622. After the operation is completed, the second torsion spring 622 can generate a force on the cover plate 62, so that the cover plate 62 moves toward the position of blocking the through hole 611, thereby facilitating the restoration of the cover plate 62. After the cover plate 62 blocks the through hole 611, the edge of the cover plate 62 abuts against the inner wall of the through hole 611, and the second torsion spring 622 continues to exert a force on the cover plate 62, so that the cover plate 62 can be fixed in the through hole 611.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0070] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0071] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0073] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An exhaust gas purification device, characterized in that: The invention comprises a first filter assembly, wherein the first filter assembly comprises: A filter box, wherein a receiving cavity is defined in the filter box, and an air inlet and an air outlet communicating with the receiving cavity are formed on the filter box; A filter element is provided in the accommodating cavity and is located between the air inlet and the air outlet. The filter element is a filter plate having a plurality of filter holes formed thereon. A cleaning mechanism, the cleaning mechanism includes fan blades, a rotating shaft and a cleaning member, the rotating shaft is rotatably arranged in the filter box, the fan blades are fixed on the rotating shaft and are located on the side of the filter member facing the air inlet, the cleaning member is fixed on the rotating shaft and is arranged axially with the fan blades on the rotating shaft, the cleaning member extends radially along the rotating shaft, and the cleaning member contacts the surface of the filter member facing the air inlet to clean the filter member.

2. The exhaust gas purification device according to claim 1, characterized in that: The cleaning member is a scraper bar, and there are multiple scrapers, which are arranged at intervals along the circumference of the rotating shaft.

3. The exhaust gas purification device according to claim 2, characterized in that: The scraper strip includes a first section, a second section, and a third section. The first section extends radially along the rotating shaft and is connected to the rotating shaft at one end. The second section is connected to the other end of the first section and extends axially along the rotating shaft toward the filter element. The third section is connected to one end of the second section close to the filter element and extends radially outward along the rotating shaft. The third section is configured to contact the filter element.

4. The exhaust gas purification device according to claim 1, characterized in that: The filter box is also provided with a dust collecting port communicating with the accommodating cavity, and the dust collecting port is provided on the lower side of the cleaning member. The first filter assembly also includes: a collection box, which is detachably connected to the lower side of the filter box, defining a collection cavity inside the collection box, and a collection port connected to the collection cavity is formed on the collection box, and the collection port is directly opposite to and connected to the dust collection port.

5. The exhaust gas purification device according to claim 4, characterized in that: A fixing hole opening in a first direction is formed on the outer wall of the collection box, and a fixing rod is provided on the filter box. The fixing rod is movable between a first position and a second position along the first direction. In the first position, one end of the fixing rod is engaged with the fixing hole to fix the collection box to the filter box. In the second position, the fixing rod is disengaged from the fixing hole.

6. The exhaust gas purification device according to claim 5, characterized in that: The fixing rod is formed with a driving groove extending along a second direction, wherein the second direction is perpendicular to the first direction. The filter box is further provided with a driving rod, and a first shaft and a second shaft are connected to the side wall of the driving rod, and the first shaft and the second shaft are arranged at intervals in the length direction of the driving rod. The first shaft is rotatably connected to the filter box, and the second shaft is engaged in the driving groove. The driving rod drives the fixing rod to move between the first position and the second position through the second shaft. A first elastic member is provided on the first shaft. The first elastic member is connected between the driving rod and the filter box. The first elastic member is used to always drive the fixing rod to move to the first position.

7. The exhaust gas purification device according to claim 6, characterized in that: The filter box is also provided with a guide rail, which extends along the first direction. The fixing rod is provided with a guide portion, and a guide hole is formed on the guide portion that penetrates the guide portion along the first direction. The guide portion can be slidably mounted on the guide rail through the guide hole.

8. The exhaust gas purification device according to claim 5, characterized in that: The number of the fixing rods and the number of the fixing holes are both two, and the fixing rods and the fixing holes correspond one to one, and the two fixing holes are respectively provided on the outer walls on both sides of the collection box in the first direction.

9. The exhaust gas purification device according to claim 1, characterized in that: Also includes: A second filter assembly, the second filter assembly comprising a particulate trap and a three-way catalytic converter, the three-way catalytic converter being connected in series between the particulate trap and the filter box, the outlet end of the three-way catalytic converter being in communication with the air inlet; and / or, The third filter assembly includes a purified liquid tank, an air inlet pipe and an air outlet pipe. The purified liquid tank is provided with purified liquid. One end of the air inlet pipe is connected to the air outlet, and the other end of the air inlet pipe extends into the purified liquid. One end of the air outlet pipe extends into the cavity between the purified liquid and the purified liquid tank, and the other end of the air outlet pipe extends out of the purified liquid tank.

10. The exhaust gas purification device according to any one of claims 1 to 9, characterized in that: Also includes: The protection component includes a protection plate and a cover plate. The protection plate is arranged on the lower side of the first filter component. A through hole is formed on the protection plate. The cover plate is openably arranged at the through hole.

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