Exhaust aftertreatment system

Abstract

The utility model relates to the field of vehicle aftertreatment, and discloses an exhaust aftertreatment system which comprises a pressure sensor and a limiting mechanism, air inlets in the two ends of the pressure sensor are connected with air guide pipes and the limiting mechanism, the limiting mechanism comprises a limiting plate and a fixing piece, and the limiting plate is provided with a first limiting piece and a second limiting piece which are spaced from each other. The first limiting piece and the second limiting piece are correspondingly connected to the two air guiding pipes respectively so as to limit the relative position between each air guiding pipe and the limiting plate, and the fixing piece is used for limiting the relative position relation between the limiting plate and the pressure sensor. Therefore, according to the utility model, the air guide pipe can not deviate relative to the pressure sensor, so that the air guide pipe can be kept at a correct position and angle in the installation and use processes, and the pressure sensor can provide an accurate measurement result.

Description

Technical Field

[0001] This utility model relates to the field of vehicle aftertreatment technology, and specifically to an exhaust aftertreatment system. Background Technology

[0002] Exhaust aftertreatment systems are crucial components for controlling and reducing vehicle emissions. Within these systems, pressure sensors measure and monitor pressure differences within the exhaust system's exhaust gas processors, helping to reflect flow resistance and back pressure conditions.

[0003] In existing exhaust aftertreatment systems, pressure sensors are connected to air intake tubes at both ends. These tubes are connected to the air pipes on the exhaust gas processor via connectors and secured with nuts. However, due to the lack of positioning constraints on the air intake tubes, turning the nuts to fix them may cause the tubes to shift. This shift can alter the angle between the air intake tubes connected to the pressure sensor, potentially affecting the accuracy of the pressure sensor readings.

[0004] In addition, the offset and angle change of the air tube can sometimes even cause deformation in parts of the air tube, which can further affect the measurement accuracy of the pressure sensor and may lead to a decrease in post-processing performance. Utility Model Content

[0005] The purpose of this invention is to overcome the problem in the prior art where the air vent rotates in the direction of tightening the nut.

[0006] To achieve the above objectives, this utility model provides an exhaust aftertreatment system including a pressure sensor, with air inlets connected to both ends of the pressure sensor; a limiting mechanism including a limiting plate and a fixing member, wherein the limiting plate is provided with a first limiting member and a second limiting member spaced apart from each other, the first limiting member and the second limiting member being respectively connected to two air inlets to limit the relative position between each air inlet and the limiting plate, and the fixing member being used to limit the relative positional relationship between the limiting plate and the pressure sensor.

[0007] Optionally, the exhaust aftertreatment system also includes an exhaust gas processor, and the fixing component includes a support column and a fixing foot. The support column is disposed on the limiting plate and close to the second limiting component. The support column is supported between the limiting plate and the exhaust gas processor, and the fixing foot is used to detachably fix the support column to the exhaust gas processor.

[0008] Optionally, the second limiting member includes a baffle disposed on the support column and in contact with the air intake tube to prevent the air intake tube from shifting relative to the pressure sensor.

[0009] Optionally, the end of the support column connected to the exhaust gas treatment device is provided with a fixing foot, and a fixing groove is provided inside the fixing foot, and the fixing foot is detachably connected to the fixing groove.

[0010] Optionally, the fixing foot includes a magnetic fixing foot, and each end of the magnetic fixing foot in the length direction is provided with a locking plate, which respectively locks into the two ends of the fixing groove in the length direction.

[0011] Optionally, the fastener may also include a limiting block, which is used to limit the relative position of the magnetic fastening foot and the exhaust gas processor.

[0012] Optionally, the support column and the limiting plate are detachably connected.

[0013] Optionally, the limiting mechanism also includes multiple bolts, and the limiting plate is provided with multiple through holes. The multiple bolts pass through the multiple through holes and are connected to the multiple connecting holes on the support column.

[0014] Optionally, the limiting plate includes a first strip plate and a second strip plate connected at an angle, with the first limiting member disposed on the first strip plate and the second limiting member disposed on the second strip plate.

[0015] Optionally, the first limiting member includes a rectangular boss, with a limiting groove at the center of the rectangular boss, the limiting groove being adapted to the outer contour shape of the air duct.

[0016] Through the above technical solution, this utility model provides a first limiting member and a second limiting member in an exhaust aftertreatment system that are respectively connected to two air intake pipes on a pressure sensor, limiting the relative position between each air intake pipe and the limiting plate, so as to keep the included angle between the two air intake pipes unchanged. At the same time, the fixing member limits the relative positional relationship between the limiting plate and the pressure sensor, so that the air intake pipe will not shift relative to the pressure sensor. Therefore, it is ensured that the air intake pipe maintains the correct position and angle during installation and use, so as to ensure that the pressure sensor can provide accurate measurement results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the exhaust gas processor structure in this utility model;

[0018] Figure 2 This is a schematic diagram of the limiting mechanism in this utility model;

[0019] Figure 3 This is a top perspective view of the limiting mechanism in this utility model;

[0020] Figure 4 This is a bottom-view perspective view of the limiting mechanism in this utility model.

[0021] Explanation of reference numerals in the attached figures

[0022] 1. Exhaust gas processor; 101. First air pipe; 102. Second air pipe; 103. Third air pipe; 104. Sealing connecting strip; 105. Nut; 2. Pressure sensor; 3. Air intake pipe; 4. Limiting component; 401. Through hole; 402. Handle; 403. Limiting plate; 404. First strip plate; 405. Second strip plate; 5. Fixing component; 501. Support column; 502. Fixing base; 503. Fixing groove; 504. Magnetic fixing foot; 505. Limiting block; 506. Fixing plate; 507. Clamping plate; 508. First side; 509. Second side; 510. Supporting base; 6. First limiting component; 601. Rectangular boss; 602. Limiting groove; 7. Second limiting component; 701. Baffle. Detailed Implementation

[0023] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this utility model by way of example, but should not be used to limit the scope of this utility model. This utility model can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0024] These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0025] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0027] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0030] refer to Figure 1 and Figure 2 The exhaust aftertreatment system includes:

[0031] Pressure sensor 2, with air inlets 3 connected to both ends of the pressure sensor 2;

[0032] The limiting mechanism includes a limiting plate 403 and a fixing member 5. The limiting plate 403 is provided with a first limiting member 6 and a second limiting member 7 spaced apart from each other. The first limiting member 6 and the second limiting member 7 are respectively connected to two air inlet pipes 3 to limit the relative position between each air inlet pipe 3 and the limiting plate 403. The fixing member 5 is used to limit the relative positional relationship between the limiting plate 403 and the pressure sensor 2.

[0033] The first limiting member 6 and the second limiting member 7 respectively connect the two air intake tubes 3 to the limiting plate 403 and limit the relative position of each air intake tube 3 and the limiting plate 403, so that the air intake tube 3 and the limiting plate 403 do not shift, thereby indirectly locking the included angle between the two air intake tubes 3.

[0034] In addition, the fixing member 5 limits the relative position of the limiting plate 403 and the pressure sensor 2, so that the limiting plate 403 will not shift relative to the pressure sensor 2 under the driving force of the movement of the two air inlet tubes 3, so that the two air inlet tubes 3 are connected to the two air inlets of the pressure sensor 2 at a certain angle.

[0035] Through the above technical solution, the first limiting member 6 and the second limiting member 7 are respectively connected to the two air inlet tubes 3 on the pressure sensor 2. By limiting the relative position between each air inlet tube 3 and the limiting plate 403, the included angle between the two air inlet tubes 3 remains unchanged. At the same time, the fixing member 5 limits the relative positional relationship between the limiting plate 403 and the pressure sensor 2, so that the air inlet tube 3 will not shift relative to the pressure sensor 2 during installation. Therefore, it is ensured that the air inlet tube 3 maintains the correct position and angle during installation and use, so as to ensure that the pressure sensor 2 can provide accurate measurement results.

[0036] In some embodiments, reference Figure 1 It is understood that the exhaust aftertreatment system in this utility model may also include an exhaust gas processor 1, and the fixing member 5 may include a support column 501 and a fixing foot. The support column 501 may be set on the limiting plate 403 and close to the second limiting member 7. The support column 501 is supported between the limiting plate 403 and the exhaust gas processor 1, so that the limiting plate 403 can be located above the two air intake pipes 3. The fixing foot is used to detachably fix the support column 501 to the exhaust gas processor 1.

[0037] In addition, a first air pipe 101 and a third air pipe 103 can be provided on the exhaust gas processor 1. The two air intake pipes 3 can be threadedly connected to the first air pipe 101 and the third air pipe 103 respectively. Nuts 105 can be provided at the connection between the air intake pipe 3 and the first air pipe 101 and the third air pipe 103. After the air intake pipe 3 is inserted into the first air pipe 101 and the third air pipe 103, the air intake pipe 3 can be fixed in the first air pipe 101 by tightening the nuts 105.

[0038] In some embodiments, the second limiting member 7 may include a baffle 701, which may be disposed on the support column 501 and in contact with the air intake tube 3 to prevent the air intake tube 3 from shifting relative to the limiting plate 403.

[0039] The support column 501 can be set next to the air intake pipe 3 and located on the path of the air intake pipe 3 rotating in the tightening direction of the nut 105. The baffle 701 can be set on the side of the support column 501 close to the air intake pipe 3 so that the baffle 701 is close to the air intake pipe 3 from the rotation direction of the air intake pipe 3, so as to prevent it from rotating with the nut 105.

[0040] Of course, in some other embodiments, the baffle 701 can also be set on the side of the limiting plate 403 near the air intake pipe 3 and located on the path of the air intake pipe 3 rotating in the tightening direction of the nut 105; it is worth noting that in this case, it is not required that the support column 501 be set on the path of the air intake pipe 3 rotating in the tightening direction of the nut 105.

[0041] In some embodiments, reference Figure 3As shown, a fixing seat 502 can be provided at one end of the support column 501 that is connected to the exhaust gas processor 1. A fixing groove 503 can be provided in the fixing seat 502. The fixing foot can be detachably connected to the fixing groove 503 to facilitate the replacement of the damaged fixing seat 502.

[0042] The width of the fixing groove 503 can be the same as the width of the sealing connecting strip 104 of the exhaust gas processor 1, so that the fixing groove 503 can be fastened onto the sealing connecting strip 104.

[0043] Additionally, the height direction of the fixed base 502 and the height direction of the support column 501 can form a certain angle, for reference. Figure 1 It can be seen that the included angle between the fixed base 502 and the support column 501 allows the support column 501 to move closer to the air intake pipe 3, so that the limiting plate 403 connected to the other end of the support column 501 is located above the two air intake pipes 3, while facilitating the fit between the baffle 701 and the air intake pipe 3.

[0044] Of course, in some other embodiments, the fixing foot can also be directly set on the end of the support column 501 that is connected to the exhaust gas processor 1. However, in this case, the fixing foot itself needs to have a certain tilt angle. Alternatively, the support column 501 can be set to extend tilted towards the air intake pipe 3 so that the support column 501 can move closer to the air intake pipe 3 and the limiting plate 403 can be located above the two air intake pipes 3.

[0045] In some embodiments, the fixing foot may include a magnetic fixing foot 504, and both ends of the magnetic fixing foot 504 in the length direction are provided with a locking plate 507. The two locking plates 507 are respectively locked at both ends of the fixing groove 503 in the length direction to fix the magnetic fixing foot 504 in the fixing groove 503.

[0046] In this method, by lifting the two side clamping plates 507, the magnetic fixing feet 504 can be detached from the fixing grooves 503. Of course, in some other embodiments, other connection methods can be used, which will not be described in detail here.

[0047] In some embodiments, the fastener 5 may further include a limiting block 505, which is used to define the relative position of the magnetic fastening foot 504 and the exhaust gas processor 1.

[0048] Among them, reference Figure 1 and Figure 4 As shown, a second air tube 102 can be provided on the side of the air intake tube 3 near the pressure sensor 2. A magnetic fixing foot can be provided between the second air tube 102 and the first air tube 101. A limiting block 505 can be provided on the first side 508 of the fixing base 502 so that it can be locked between the magnetic fixing foot and the second air tube 102, thereby restricting the magnetic fixing foot 504 from sliding away from the air intake tube 3.

[0049] In addition, a fixing plate 506 is provided on the side of the limiting block 505 near the second air pipe 102, and the fixing plate 506 is detachably fixed to the second side 509 of the fixing seat 502 by bolts.

[0050] In some embodiments, the support column 501 and the limiting plate 403 are detachably connected to facilitate the replacement of a damaged support column 501 or limiting plate 403.

[0051] In some embodiments, the limiting mechanism further includes multiple bolts, and the limiting plate 403 is provided with multiple through holes 401. The multiple bolts pass through the multiple through holes 401 and are connected to the multiple connecting holes on the support column 501.

[0052] Among them, a support base 510 can be provided at one end of the support column 501 connected to the limiting plate 403 to increase the contact area between the support column 501 and the limiting plate and enhance the stability of the connection; multiple connection holes can be provided on the support base.

[0053] In some embodiments, the limiting plate 403 may include a first strip plate 404 and a second strip plate 405 connected at an angle, a first limiting member 6 may be disposed on the first strip plate 404, and a second limiting member 7 may be disposed on the second strip plate 405.

[0054] The angle between the first strip plate 404 and the second strip plate 405 is equal to the angle between the air inlet tubes 3 connected to both ends of the pressure sensor 2, so that the first limiting member 6 and the second limiting member 7 can connect the two air inlet tubes 3 at an angle to the limiting plate 403.

[0055] Of course, in some other embodiments, the limiting plate 403 may include a straight plate. However, it is worth noting that in this case, the first limiting member 6 and the second limiting member 7 at both ends of the limiting plate 403 need to be set at a certain angle. This will not be elaborated on further here.

[0056] In some embodiments, the first limiting member 6 may include a rectangular boss 601, and a limiting groove 602 may be provided at the center of the rectangular boss 601. The limiting groove 602 may be adapted to the outer contour shape of the air intake tube 3 to limit the relative position of the air intake tube 3 and the limiting plate 403.

[0057] The top of the limiting groove 602 may be provided with an opening, through which the air intake tube 3 can enter the limiting groove 602. This prevents the inner wall of the limiting groove 602 from blocking the air intake tube 3 from rotating with the nut 105 when the nut 105 at the connection between the air intake tube 3 and the third air tube 103 is tightened.

[0058] In some embodiments, reference Figure 4As shown, a handle 402 may be provided on the limiting plate 403 to facilitate the installation or removal of the limiting mechanism.

[0059] The two ends of the handle 402 can be fixed to the limiting plate 403 by bolts.

[0060] In this utility model, after tightening the nuts 105 on the two air intake pipes 3 and the first air pipe 101 and the third air pipe 103, the magnetic fixing foot 504 can be removed from the sealing connecting strip 104 and fixed to the sealing connecting strip 104 of the next exhaust gas processor 1 with the nut 105 not tightened, so that the limiting plate 403 and the support column 501 can be reused, reducing production costs.

[0061] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and all fall within the protection scope of the present invention.

Claims

1. An exhaust aftertreatment system, characterized in that, include: Pressure sensor (2), with air inlets (3) connected to both ends of the pressure sensor (2); The limiting mechanism includes a limiting plate (403) and a fixing member (5). The limiting plate (403) is provided with a first limiting member (6) and a second limiting member (7) spaced apart from each other. The first limiting member (6) and the second limiting member (7) are respectively connected to the two air inlet tubes (3) to limit the relative position between each air inlet tube (3) and the limiting plate (403). The fixing member (5) is used to limit the relative positional relationship between the limiting plate (403) and the pressure sensor (2).

2. The exhaust aftertreatment system according to claim 1, characterized in that, The exhaust aftertreatment system also includes an exhaust gas processor (1). The fixing member (5) includes a support column (501) and a fixing foot. The support column (501) is disposed on the limiting plate (403) and close to the second limiting member (7). The support column (501) is supported between the limiting plate (403) and the exhaust gas processor (1). The fixing foot is used to detachably fix the support column (501) on the exhaust gas processor (1).

3. The exhaust aftertreatment system according to claim 2, characterized in that, The second limiting member (7) includes a baffle (701), which is disposed on the support column (501) and in contact with the air intake pipe (3) to prevent the air intake pipe (3) from shifting relative to the limiting plate (403).

4. The exhaust aftertreatment system according to claim 2, characterized in that, The support column (501) is connected to the exhaust gas treatment device at one end and is provided with a fixing seat (502). The fixing seat (502) is provided with a fixing groove (503), and the fixing foot is detachably connected to the fixing groove (503).

5. The exhaust aftertreatment system according to claim 4, characterized in that, The fixing foot includes a magnetic fixing foot (504), and both ends of the magnetic fixing foot (504) in the length direction are provided with a locking plate (507), and the two locking plates (507) are respectively locked at both ends of the fixing groove (503) in the length direction.

6. The exhaust aftertreatment system according to claim 5, characterized in that, The fixing member (5) also includes a limiting block (505), which is used to limit the relative position of the magnetic fixing foot (504) and the exhaust gas processor (1).

7. The exhaust aftertreatment system according to claim 2, characterized in that... The support column (501) and the limiting plate (403) are detachably connected.

8. The exhaust aftertreatment system according to claim 7, characterized in that, The limiting mechanism also includes multiple bolts, and the limiting plate (403) is provided with multiple through holes (401). The multiple bolts pass through the multiple through holes (401) and are connected to the multiple connecting holes on the support column (501).

9. The exhaust aftertreatment system according to claim 1, characterized in that, The limiting plate (403) includes a first strip plate (404) and a second strip plate (405) connected at an angle. The first limiting member (6) is disposed on the first strip plate (404), and the second limiting member (7) is disposed on the second strip plate (405).

10. The exhaust aftertreatment system according to claim 1, characterized in that, The first limiting member (6) includes a rectangular boss (601), and a limiting groove (602) is provided at the center of the rectangular boss (601). The limiting groove (602) is adapted to the outer contour shape of the air duct (3).

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