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. By means of the arrangement, the mixer assembly can conduct hedging on airflow, and therefore the mixing effect can be improved.

Description

Technical Field

[0001] The invention relates to a mixer component and belongs to the technical field of engine exhaust post-processing. Background Art

[0002] Mixer assemblies in related art typically include a housing and a mixing tube within the housing. The mixing tube includes several fins that direct airflow into the mixing tube in a spiral pattern. When injection conditions are met, a urea nozzle sprays atomized urea droplets into the mixing tube, where the airflow and urea droplets mix.

[0003] However, there is still room for improvement in the mixer assemblies of the related art. Summary of the Invention

[0004] An object of the present invention is to provide a mixer assembly having an improved structure.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a mixer assembly, which includes a shell, a partition located in the shell, a bottom plate matched with the partition, and a mixing tube assembly provided on the partition; the partition divides the shell into an air inlet cavity located on one side of the partition and an air outlet cavity located on the other side of the partition; the mixer assembly also includes an intermediate cavity formed by at least the bottom plate and the partition, and the intermediate cavity is connected between the air inlet cavity and the air outlet cavity; the air inlet cavity includes a first air inlet cavity located at the top and a second air inlet cavity located at the bottom; the bottom plate is provided with an opening connected to the second air inlet cavity; the mixing tube assembly includes an outer tube, an inner tube at least partially provided in the outer tube, and an annular space located 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 matches the bottom plate, and the outer tube is provided with a groove connected to the intermediate cavity.

[0006] As a further improved technical solution of the present invention, the bottom of the outer tube is fixed to the bottom plate.

[0007] As a further improved technical solution of the present invention, the bottom of the outer tube is inserted into the opening.

[0008] As a further improved technical solution of the present invention, the bottom surface of the outer tube is coplanar with the bottom surface of the bottom plate.

[0009] As a further improved technical solution of the present invention, the outer tube includes a first tube body portion and a second tube body portion, the first tube body portion is located in the first air inlet cavity, the second tube body portion is located in the middle cavity, and the groove runs through the tube wall of the second tube body portion.

[0010] As a further improved technical solution 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 through holes connected to the annular space, the swirl tube is provided with a plurality of swirl plates, each swirl plate is partially located in the annular space and partially located in the first air inlet cavity.

[0011] As a further improved technical solution of the present invention, 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 improved technical solution of the present invention, the porous tube is provided with a plurality of first fixing claws extending toward the swirl plate and protruding outward, and the first fixing claws are welded and fixed to the inner wall of the outer tube.

[0013] As a further improved technical solution of the present invention, the mixing tube assembly also includes a fixing ring that is sleeved on the porous tube and located at the bottom of the porous tube, the fixing ring is located in the annular space, and the fixing ring 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 improved technical solution of the present invention, the partition includes a first partition and a second partition, the first partition includes a first mounting portion and a first retaining wall portion, the bottom plate is fixed to the first retaining wall portion, and the first mounting portion is provided with a first mounting hole;

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

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

[0017] As a further improved technical solution of the present invention, the mixer assembly further includes a baffle matched with the partition, the baffle shielding the rear end of the intermediate cavity, and the baffle is provided with a plurality of openings connecting the intermediate cavity and the air outlet cavity.

[0018] As a further improved technical solution of the present invention, the mixer assembly also includes a spoiler fixed in the shell, the spoiler is located in the air outlet cavity, the spoiler is provided with an extension arm extending toward the baffle, and the extension arm is provided with a plurality of air flow through holes.

[0019] As a further improved technical solution of the present invention, the axial direction of the shell is perpendicular to the axial direction of the mixing tube assembly.

[0020] Compared to the prior art, the mixer assembly of the present invention is provided with an air inlet cavity, which includes a first air inlet cavity at the top and a second air inlet cavity at the bottom; the bottom plate is provided with an opening connected to the second air inlet cavity; the mixing tube assembly includes an outer tube, an inner tube at least partially disposed in the outer tube, and an annular space located between the outer tube and the inner tube, the outer tube at least partially extending into the intermediate cavity, the bottom of the outer tube cooperates with the bottom plate, and the outer tube is provided with a slot connected to the intermediate cavity. With this arrangement, the mixer assembly can allow the airflows flowing from the first air inlet cavity and the second air inlet cavity into the mixing tube assembly to offset each other, thereby improving the mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a perspective schematic diagram of a mixing tube assembly according to one embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A top view of

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

[0024] Figure 4 It is along Figure 2 Schematic diagram of the cross section along line AA. DETAILED DESCRIPTION

[0025] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings. If there are several specific embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the drawings, unless otherwise specified, the same numbers or symbols in different drawings represent the same or similar elements. The contents described in the following exemplary embodiments do not represent all embodiments of the present invention. On the contrary, they are only examples of products consistent with the present invention as described in the claims of the present invention.

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

[0027] Please refer to Figures 1 to 4As shown, the present invention discloses a mixing tube assembly 100, which includes a housing 1, a partition 2 located in the housing 1, a bottom plate 3 cooperating with the partition 2, a mixing tube assembly 4 provided on the partition 2, a baffle 5 cooperating with the partition 2, a spoiler 6 fixed in the housing 1, an intake cone 7 connected to the housing 1, an air flow distribution plate 8 fixed in the intake cone 7, and a nozzle mounting base 9 cooperating with the mixing tube assembly 4. The nozzle mounting base 9 is used to mount a urea nozzle (not shown), which is used to spray atomized urea droplets into the mixing tube assembly 4.

[0028] In the illustrated embodiment of the present invention, the housing 1 is cylindrical, with its axial direction being a first direction BB (e.g., horizontal direction). The axial direction of the mixing tube assembly 4 is a second direction CC (e.g., vertical direction). The first direction BB is perpendicular to the second direction CC.

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

[0030] Specifically, in the illustrated embodiment of the present invention, 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 retaining wall portion 212. The first retaining wall portion 212 is perpendicular to the first mounting portion 211. The bottom plate 3 is fixed to the first retaining wall portion 212. The first mounting portion 211 is provided with a first mounting hole 2110. The first mounting hole 2110 is generally semicircular.

[0031] The second partition plate 22 includes a second mounting portion 221 and a second retaining wall portion 222. The second mounting portion 221 defines a second mounting hole 2210. The second mounting hole 2210 is generally semicircular in shape. The second retaining wall portion 222 is welded to the inner wall of the housing 1. The first mounting portion 211 and the second mounting portion 221 are fixed together. The first mounting hole 2110 and the second mounting hole 2210 form a mounting hole 20, through which the mixing tube assembly 4 at least partially passes.

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

[0033] In the illustrated embodiment of the present invention, the mixing 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 that fixes the inner tube 42 in the outer tube 41.

[0034] The outer tube 41 at least partially extends into the middle 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 communicating with the middle cavity 103 .

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

[0036] The outer tube 41 includes a first tube portion 411 and a second tube portion 412. The first tube portion 411 is located in the first air inlet cavity 1011, and the second tube portion 412 is located in the middle cavity 103. The slot 4120 passes through the wall of the second tube portion 412 and communicates with the middle 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 connected to the annular space 40. The swirl tube 422 is provided with a plurality of swirl plates 4221. Each swirl plate 4221 is partially located in the annular space 40 and partially located in the first air inlet cavity 1011.

[0038] In the illustrated embodiment of the present invention, the porous tube 421 and the swirl tube 422 are two separate parts 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 plate 4221 and protruding outward. 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 is provided with a plurality of second fixing claws 431, which are welded and fixed to the inner wall of the outer tube 41.

[0039] Specifically, in the illustrated embodiment of the present invention, the slot 4120 includes a first slot 4120a located at the top and a second slot 4120b located at the bottom. 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 middle cavity 103 , and is provided with a plurality of openings 51 communicating with the middle cavity 103 and the gas 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 air flow through holes 610 .

[0042] During use, the engine's exhaust gas passes through the air flow distribution plate 8 and enters the intake chamber 101. Under the action of the baffle 5 and the bottom plate 3, a portion of the exhaust gas flows from the first intake chamber 1011 into the mixer assembly 4, and another portion 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 sprays urea droplets into 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 granules collide with the walls of the inner tube 42 and the outer tube 41 and break into pieces. The urea granules then pass through the baffle 5 and the spoiler 6 to improve the uniformity of the ammonia.

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

Claims

1. A mixer assembly, characterized in that:

18. The ventilator as claimed in claim 17, wherein the air filter is a pipe which is connected to the air intake port of the air inlet pipe, the pipe having a first end and a second end connected to the air outlet pipe by a channel having a first end and a second end connected to the air outlet pipe by a channel having a first end and a second end connected to the air outlet pipe by a channel having a first end and a second end connected to the air outlet pipe by a channel 2. The mixer assembly according to claim 1, wherein: The bottom of the outer tube is fixed to the bottom plate.

3. The mixer assembly according to claim 2, wherein: The bottom of the outer tube is inserted into the opening.

4. The mixer assembly according to claim 3, wherein: The bottom surface of the outer tube is coplanar with the bottom surface of the bottom plate.

5. The mixer assembly according to claim 1, wherein: The outer tube includes a first tube body portion and a second tube body portion, the first tube body portion is located in the first air inlet cavity, the second tube body portion is located in the middle cavity, and the groove runs through the tube wall of the second tube body portion.

6. The mixer assembly according to claim 5, wherein: 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 through holes connected to the annular space. The swirl tube is provided with a plurality of swirl plates. Each swirl plate is partially located in the annular space and partially located in the first air inlet cavity.

7. The mixer assembly according to claim 6, wherein: The porous tube and the cyclone tube are two parts and are fixed together; the cyclone tube is at least partially inserted into the porous tube.

8. The mixer assembly according to claim 7, wherein: The porous tube is provided with a plurality of first fixing claws extending toward the swirl plate and protruding outward, and the first fixing claws are welded and fixed to the inner wall of the outer tube.

9. The mixer assembly according to claim 8, wherein: The mixing 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. The second fixing claws 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 portion and a first retaining wall portion, the bottom plate is fixed to the first retaining wall portion, and the first mounting portion is provided with a first mounting hole; The second partition includes a second mounting portion and a second retaining wall portion, and the second mounting portion is provided with a second mounting hole; The first mounting portion is fixed to the second mounting portion, the first mounting hole and the second mounting hole form a mounting hole, and the outer tube at least partially passes through the mounting hole.

11. The mixer assembly of claim 1 , wherein: The mixer assembly further comprises a baffle matched with the partition, the baffle shielding the rear end of the intermediate cavity, and the baffle is provided with a plurality of openings communicating with the intermediate cavity and the gas outlet cavity.

12. The mixer assembly of claim 11, wherein: The mixer assembly further comprises a spoiler fixed in the housing, the spoiler being located in the air outlet cavity, the spoiler being provided with an extension arm extending toward the baffle, and the extension arm being provided with a plurality of air flow through holes.

13. The mixer assembly of claim 1, wherein: The axial direction of the shell is perpendicular to the axial direction of the mixing tube assembly.

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