Mixer assembly

Abstract

A mixer assembly comprises a shell, a partition plate, a bottom plate matched with the partition plate and a mixing pipe assembly arranged on the partition plate. The shell is divided into an air inlet cavity and an air outlet cavity by the partition plate. The mixer assembly further comprises a middle cavity at least formed by the bottom plate and the partition plate, and the middle cavity is communicated between the air inlet cavity and the air outlet cavity. The air inlet cavity comprises a first air inlet cavity body located at the top and a second air inlet cavity body located at the bottom. The bottom plate is provided with an opening communicated with the second air inlet cavity. The mixing tube assembly includes an outer tube and an inner tube. At least part of the outer pipe extends into the middle cavity, the bottom of the outer pipe is matched with the bottom plate, and the outer pipe is provided with an open groove communicated with the middle cavity. Due to the arrangement, the mixer assembly disclosed by the utility model can be used for carrying out hedging on airflow, so that the mixing effect is favorably improved.

Description

Technical Field

[0001] This utility model relates to a mixer assembly, belonging to the field of engine exhaust aftertreatment technology. Background Technology

[0002] Mixer assemblies in related technologies typically include a housing and a mixing tube located within the housing. The mixing tube includes several fins to guide airflow in a spiral pattern. When injection conditions are met, a urea nozzle injects atomized urea droplets into the mixing tube, and the airflow mixes with the urea droplets.

[0003] However, there is still room for improvement in the mixer components of the relevant technologies. Utility Model Content

[0004] The purpose of this invention is to provide a mixer assembly with an improved structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a mixer assembly, comprising a housing, a partition located within the housing, a base plate cooperating with the partition, and a mixing pipe assembly disposed on the partition; the partition divides the housing into an air inlet chamber located on one side of the partition and an air outlet chamber located on the other side of the partition; the mixer assembly further comprises an intermediate cavity formed at least by the base plate and the partition, the intermediate cavity communicating between the air inlet chamber and the air outlet chamber; the air inlet chamber comprises a first air inlet chamber located at the top and a second air inlet chamber located at the bottom; the base plate has an opening communicating with the second air inlet chamber; the mixing pipe assembly comprises an outer pipe, an inner pipe at least partially disposed within the outer pipe, and an annular space located between the outer pipe and the inner pipe, the outer pipe at least partially extending into the intermediate cavity, the bottom of the outer pipe cooperating with the base plate, and the outer pipe having a slot communicating with the intermediate cavity.

[0006] As a further improvement of this utility model, the bottom of the outer tube is fixed to the base plate.

[0007] As a further improvement of this utility model, the bottom of the outer tube is inserted into the opening.

[0008] As a further improvement of this utility model, the bottom surface of the outer tube is coplanar with the bottom surface of the base plate.

[0009] As a further improvement of the present invention, the outer tube includes a first tube body and a second tube body, the first tube body is located in the first air intake cavity, the second tube body is located in the intermediate cavity, and the slot penetrates the tube wall of the second tube body.

[0010] As a further improvement of the present invention, the inner tube includes a porous tube and a swirl tube connected to the porous tube. The porous tube is provided with a plurality of perforations communicating with the annular space, and the swirl tube is provided with a plurality of swirl vanes. Each swirl vane is partially located in the annular space and partially located in the first air intake cavity.

[0011] As a further improvement of this utility model, the porous tube and the vortex tube are two parts and are fixed together; the vortex tube is at least partially inserted into the porous tube.

[0012] As a further improvement of the present invention, the porous tube is provided with a plurality of first fixing claws extending toward the swirl vane and protruding outward, and the first fixing claws are welded and fixed to the inner wall of the outer tube.

[0013] As a further improvement of the present invention, the hybrid tube assembly further includes a fixing ring sleeved on the porous tube and located at the bottom of the porous tube. The fixing ring is located in the annular space and is provided with a plurality of second fixing claws, which are welded and fixed to the inner wall of the outer tube.

[0014] As a further improvement of the present invention, the partition includes a first partition and a second partition. The first partition includes a first mounting part and a first baffle part. The bottom plate is fixed to the first baffle part. The first mounting part is provided with a first mounting hole.

[0015] The second partition includes a second mounting portion and a second baffle portion, wherein the second mounting portion is provided with a second mounting hole;

[0016] The first mounting part is fixed to the second mounting part, and the first mounting hole and the second mounting hole form a mounting hole, through which the outer tube passes at least partially.

[0017] As a further improvement of the present invention, the mixer assembly further includes a baffle that cooperates with the partition plate. The baffle covers the rear end of the intermediate cavity and has several openings that connect the intermediate cavity and the air outlet cavity.

[0018] As a further improvement of the present invention, the mixer assembly further includes a baffle plate fixed inside the housing. The baffle plate is located in the air outlet cavity. The baffle plate is provided with an extension arm extending toward the baffle plate. The extension arm is provided with a plurality of airflow perforations.

[0019] As a further improvement of this utility model, the axial direction of the housing is perpendicular to the axial direction of the mixing tube assembly.

[0020] Compared to existing technologies, the mixer assembly of this invention features an air intake chamber comprising a first air intake chamber at the top and a second air intake chamber at the bottom. The base plate has an opening communicating with the second air intake chamber. The mixing pipe assembly includes an outer pipe, an inner pipe at least partially disposed within the outer pipe, and an annular space between the outer pipe and the inner pipe. The outer pipe extends at least partially into the intermediate cavity, its bottom fitting into the base plate, and has a slot communicating with the intermediate cavity. This configuration allows the mixer assembly to counteract the airflow flowing from the first and second air intake chambers into the mixing pipe assembly, thereby improving the mixing effect. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the hybrid tube assembly of this utility model in one embodiment;

[0022] Figure 2 yes Figure 1 Top view;

[0023] Figure 3 yes Figure 1 3D exploded view;

[0024] Figure 4 It is along Figure 2 A cross-sectional view of line AA in the middle. Detailed Implementation

[0025] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Where several specific embodiments exist, features in these embodiments can be combined with each other without conflict. When the description relates to the drawings, unless otherwise stated, the same numbers or symbols in different drawings represent the same or similar elements. The content described in the following exemplary embodiments does not represent all embodiments of this utility model; rather, they are merely examples of products consistent with this utility model and as described in the claims.

[0026] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the scope of protection of this invention. It should be understood that terms such as "first," "second," and similar words used in the specification and claims of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish the features.

[0027] Please refer to Figures 1 to 4As shown, this utility model discloses a mixing tube assembly 100, which includes a housing 1, a partition 2 located in the housing 1, a base plate 3 cooperating with the partition 2, a mixing tube assembly 4 disposed on the partition 2, a baffle 5 cooperating with the partition 2, a baffle 6 fixed in the housing 1, an intake cone 7 connected to the housing 1, an airflow distribution plate 8 fixed in the intake cone 7, and a nozzle mounting seat 9 cooperating with the mixing tube assembly 4. The nozzle mounting seat 9 is used to install a urea nozzle (not shown), and the urea nozzle is used to spray atomized urea droplets into the mixing tube assembly 4.

[0028] In the embodiment illustrated in this utility model, the housing 1 is cylindrical, and its axial direction is a first direction BB (e.g., horizontal). The axial direction of the mixing tube assembly 4 is a second direction CC (e.g., vertical). The first direction BB is perpendicular to the second direction CC.

[0029] The partition 2 divides the housing 1 into an air inlet chamber 101 located on one side of the partition 2 and an air outlet chamber 102 located on the other side of the partition 2.

[0030] Specifically, in the embodiment illustrated in this utility model, the partition 2 includes a first partition 21 and a second partition 22. The first partition 21 includes a first mounting portion 211 and a first baffle portion 212. The first baffle portion 212 is perpendicular to the first mounting portion 211. The base plate 3 is fixed to the first baffle portion 212, and the first mounting portion 211 is provided with a first mounting hole 2110. The first mounting hole 2110 is approximately semi-circular.

[0031] The second partition 22 includes a second mounting portion 221 and a second baffle portion 222. The second mounting portion 221 has a second mounting hole 2210. The second mounting hole 2210 is generally semi-circular. The second baffle portion 222 is welded and fixed to the inner wall of the housing 1. The first mounting portion 211 is fixed to the second mounting portion 221, and the first mounting hole 2110 and the second mounting hole 2210 form a mounting hole 20, through which the mixing tube assembly 4 passes at least partially.

[0032] The mixer assembly 4 includes an intermediate cavity 103 formed by the base plate 3, the partition plate 2, and the baffle plate 5, the intermediate cavity 103 connecting the air intake cavity 101 and the air outlet cavity 102. The air intake cavity 101 includes a first air intake cavity 1011 located at the top and a second air intake cavity 1012 located at the bottom. The base plate 3 has an opening 31 communicating with the second air intake cavity 1012.

[0033] In the embodiment illustrated in this utility model, the hybrid tube assembly 4 includes an outer tube 41, an inner tube 42 at least partially disposed in the outer tube 41, an annular space 40 located between the outer tube 41 and the inner tube 42, and a fixing ring 43 for fixing the inner tube 42 in the outer tube 41.

[0034] The outer tube 41 extends at least partially into the intermediate cavity 103, the bottom of the outer tube 41 cooperates with the bottom plate 3, and the outer tube 41 is provided with a slot 4120 that communicates with the intermediate cavity 103.

[0035] Specifically, in the embodiment illustrated in this utility model, the bottom of the outer tube 41 is fixed to the base plate 3. The bottom of the outer tube 41 is inserted into the opening 31 and welded to the base plate 3. The bottom surface of the outer tube 41 is coplanar with the bottom surface of the base plate 3.

[0036] The outer tube 41 includes a first tube body 411 and a second tube body 412. The first tube body 411 is located in the first air intake cavity 1011, and the second tube body 412 is located in the intermediate cavity 103. The slot 4120 penetrates the tube wall of the second tube body 412 and communicates with the intermediate cavity 103.

[0037] The inner tube 42 includes a porous tube 421 and a swirl tube 422 connected to the porous tube 421. The porous tube 421 is provided with a plurality of through holes 4211 communicating with the annular space 40. The swirl tube 422 is provided with a plurality of swirl vanes 4221. Each swirl vane 4221 is partially located in the annular space 40 and partially located in the first air intake chamber 1011.

[0038] In the embodiment illustrated in this utility model, the porous tube 421 and the swirl tube 422 are two parts and are fixed together. The swirl tube 422 is at least partially inserted into the porous tube 421. The porous tube 421 is provided with a plurality of first fixing claws 4212 extending toward the swirl vane 4221 and protruding outward, and the first fixing claws 4212 are welded and fixed to the inner wall of the outer tube 41. The fixing ring 43 is sleeved on the porous tube 421 and located at the bottom of the porous tube 421. The fixing ring 43 is located in the annular space 40, and the fixing ring 43 is provided with a plurality of second fixing claws 431, and the second fixing claws 431 are welded and fixed to the inner wall of the outer tube 41.

[0039] Specifically, in the embodiment illustrated in this utility model, the slot 4120 includes a first slot 4120a located at the upper part and a second slot 4120b located at the lower part. The porous tube 421 extends downward to the top of the second slot 4120b. The fixing ring 43 is located between the first slot 4120a and the second slot 4120b.

[0040] The baffle 5 covers the rear end of the intermediate cavity 103, and the baffle 5 is provided with a plurality of openings 51 connecting the intermediate cavity 103 and the air outlet cavity 102.

[0041] The spoiler 6 is located in the air outlet cavity 102. The spoiler 6 is provided with an extension arm 61 extending toward the baffle 5. The extension arm 61 is provided with a plurality of airflow perforations 610.

[0042] In operation, the engine exhaust gas passes through the airflow distribution plate 8 and enters the intake chamber 101. Under the action of the baffle 5 and the bottom plate 3, part of the exhaust gas flows from the first intake chamber 1011 into the mixer assembly 4, and another part of the exhaust gas flows from the second intake chamber 1012 into the mixer assembly 4. When the injection conditions are met, the urea nozzle atomizes urea droplets into the nozzle of the mixer assembly 4. At this time, the urea droplets, the exhaust gas flowing into the mixer assembly 4 from the first intake chamber 1011, and the exhaust gas flowing into the mixer assembly 4 from the second intake chamber 1012 collide in the mixer assembly 4. The urea particles collide and break through the walls of the inner pipe 42 and the outer pipe 41, and then the uniformity of ammonia is improved by the baffle 5 and the baffle 6.

[0043] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. A mixer assembly, characterized in that, The device includes a housing, a partition within the housing, a base plate cooperating with the partition, and a mixing tube assembly disposed on the partition. The partition divides the housing into an air inlet chamber on one side of the partition and an air outlet chamber on the other side of the partition. The mixing tube assembly further includes an intermediate cavity formed by at least the base plate and the partition, the intermediate cavity communicating between the air inlet chamber and the air outlet chamber. The air inlet chamber includes a first air inlet chamber at the top and a second air inlet chamber at the bottom. The base plate has an opening communicating with the second air inlet chamber. The mixing tube assembly includes an outer tube, an inner tube at least partially disposed within the outer tube, and an annular space between the outer tube and the inner tube. The outer tube at least partially extends into the intermediate cavity, the bottom of the outer tube cooperating with the base plate, and the outer tube having a slot communicating with the intermediate cavity.

2. The mixer assembly as claimed in claim 1, characterized in that: The bottom of the outer tube is fixed to the base plate.

3. The mixer assembly as claimed in claim 2, characterized in that: The bottom of the outer tube is inserted into the opening.

4. The mixer assembly as claimed in claim 3, characterized in that: The bottom surface of the outer tube is coplanar with the bottom surface of the base plate.

5. The mixer assembly as claimed in claim 1, characterized in that: The outer tube includes a first tube body and a second tube body. The first tube body is located in the first air intake cavity, and the second tube body is located in the intermediate cavity. The slot penetrates the tube wall of the second tube body.

6. The mixer assembly as claimed in claim 5, characterized in that: The inner tube includes a porous tube and a swirl tube connected to the porous tube. The porous tube has several perforations that communicate with the annular space. The swirl tube has several swirl vanes, each of which is partially located in the annular space and partially located in the first air intake cavity.

7. The mixer assembly as claimed in claim 6, characterized in that: The porous tube and the vortex tube are two parts and are fixed together; the vortex tube is at least partially inserted into the porous tube.

8. The mixer assembly as claimed in claim 7, characterized in that: The porous tube is provided with a plurality of first fixing claws extending toward the swirl vane and protruding outward, and the first fixing claws are welded and fixed to the inner wall of the outer tube.

9. The mixer assembly as claimed in claim 8, characterized in that: The hybrid tube assembly also includes a fixing ring sleeved on the porous tube and located at the bottom of the porous tube. The fixing ring is located in the annular space and is provided with a plurality of second fixing claws, which are welded and fixed to the inner wall of the outer tube.

10. The mixer assembly of claim 5, wherein: The partition includes a first partition and a second partition. The first partition includes a first mounting part and a first baffle part. The bottom plate is fixed to the first baffle part. The first mounting part is provided with a first mounting hole. The second partition includes a second mounting portion and a second baffle portion, wherein the second mounting portion is provided with a second mounting hole; The first mounting part is fixed to the second mounting part, and the first mounting hole and the second mounting hole form a mounting hole, through which the outer tube passes at least partially.

11. The mixer assembly as claimed in claim 1, characterized in that: The mixer assembly also includes a baffle that cooperates with the partition, the baffle covering the rear end of the intermediate cavity, and the baffle having a plurality of openings connecting the intermediate cavity and the air outlet cavity.

12. The mixer assembly of claim 11, characterized in that: The mixer assembly further includes a baffle plate fixed inside the housing, the baffle plate being located in the air outlet cavity, the baffle plate having an extension arm extending toward the baffle, the extension arm having a plurality of airflow perforations.

13. The mixer assembly as claimed in claim 1, characterized in that: The axial direction of the housing is perpendicular to the axial direction of the mixing tube assembly.

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