Non-road tail gas after-treatment device

Abstract

The utility model provides a non-road tail gas after-treatment device which comprises a bottom plate flange, a cylinder body, a gas inlet pipe, a gas outlet pipe, a gas outlet pipe, a gas inlet pipe, a gas outlet pipe, a gas outlet pipe and a gas outlet pipe, wherein the cylinder body is arranged on one side of the bottom plate flange; the air inlet pipe is arranged at one end, close to the end cover, of the cylinder body, one end of the air inlet pipe is arranged in the cylinder body, the other end of the air inlet pipe is arranged outside the cylinder body and forms an extension part, and a plurality of air outlet holes are formed in the part, located in the cylinder body, of the air inlet pipe; the heat insulation cover assembly comprises a barrel heat insulation cover arranged on the outer side of the barrel in a sleeving mode. The bag body heat insulation cover is arranged on the extension part of the air inlet pipe in a sleeving manner; and the bracket assembly is fixedly connected with the end cover and the bottom plate flange. According to the non-road tail gas after-treatment device, the number of welding seams of the heat shield is reduced, safety performance is high, production, manufacturing and assembling are easy, cost is low, the cylinder is fixedly connected with the bottom plate flange through the support assembly, and reliability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of tail gas treatment, and in particular relates to a non-road tail gas post-treatment device. Background Art

[0002] With the introduction of the National IV non-road standard, the types of post-processing that meet the national standard are becoming increasingly diverse. The working environment of non-road machinery is changeable, mostly in factories, farmlands, mining areas and other places. Compared with commercial vehicles on the road, the operating conditions of non-road vehicles are more severe and demanding, mainly in terms of temperature, service environment and operating acceleration, and they are prone to contact with flammable materials. Therefore, higher requirements are placed on the reliability of non-road structures and product surface temperature control. Phenomena such as wiring harness ablation are not allowed, and straw and other substances are not allowed to enter the product body.

[0003] In existing exhaust gas after-treatment devices, the heat shield structure on the outside of the purifier cylinder has many welds, which are prone to stress concentration, leading to fracture and failure, affecting the insulation effect. In addition, the bracket between the cylinder and the base plate flange cannot be fixed, has low strength and is unstable, posing a safety hazard. Summary of the Invention

[0004] To solve at least one technical problem in the prior art, the present invention provides a non-road exhaust gas after-treatment device with good thermal insulation and stable structure. To achieve the above technical objectives, the present invention adopts the following technical solutions:

[0005] The present invention provides a non-road exhaust gas after-treatment device, comprising:

[0006] Base plate flange,

[0007] A cylinder body is provided on one side of the bottom plate flange, the cylinder body extends axially, and an end cover is provided at one end of the cylinder body close to the bottom plate flange;

[0008] an air inlet pipe, the air inlet pipe being arranged at one end of the cylinder body close to the end cover and sealing the end of the cylinder body together with the end cover, the air inlet pipe extending radially along the cylinder body, one end of the air inlet pipe being arranged in the cylinder body, the other end being arranged outside the cylinder body and extending toward the outside of the cylinder body to form an extension portion, the portion of the air inlet pipe located in the cylinder body being provided with a plurality of air outlet holes;

[0009] Heat shield assembly, including:

[0010] a cylinder heat insulation cover, which is sleeved on the outer side of the cylinder, wherein one end of the cylinder heat insulation cover is fixedly connected to the end of the cylinder away from the bottom plate flange, and the other end is fixedly connected to the bottom plate flange; a through hole is provided on the cylinder heat insulation cover, and the through hole is for the air intake pipe to pass through;

[0011] An enclosure heat insulation cover is sleeved on the extension portion of the air inlet pipe, and the enclosure heat insulation cover is fixedly connected to the cylinder heat insulation cover;

[0012] The bracket assembly is used to fixedly connect the end cover and the base plate flange.

[0013] Furthermore, the bracket assembly includes:

[0014] a bottom plate, fixedly connected to the bottom plate flange;

[0015] a first side plate, one side of the first side plate being fixedly connected to one side of the bottom plate, and the other side of the first side plate being fixedly connected to the end cover;

[0016] A second side plate, one side of which is fixedly connected to the other side of the bottom plate, and the other side of which is fixedly connected to the end cover.

[0017] Furthermore, the interval between the first side plate and the second side plate gradually increases from a side close to the bottom plate to a side far from the bottom plate.

[0018] Furthermore, the angle between the first side plate and the bottom plate is 110-130°;

[0019] And / or, the angle between the second side panel and the bottom panel is 110-130°.

[0020] Furthermore, a first extension portion is provided on a side of the first side plate facing away from the bottom plate, and the first extension portion is fitted with and fixedly connected to the end cover;

[0021] And / or, a second extension portion is further provided on a side of the second side plate facing away from the bottom plate, and the second extension portion is in contact with and fixedly connected to the end cover.

[0022] Furthermore, the bottom plate is provided with a mounting hole.

[0023] The bottom plate flange is provided with an assembly hole.

[0024] Also included is a mounting screw, which passes through the assembly hole and is threadedly connected to the mounting hole.

[0025] Furthermore, the bottom plate is provided with four mounting holes, and the four mounting holes are distributed at the four corners of the bottom plate;

[0026] The bottom plate flange is provided with four assembly holes, and the positions of the assembly holes correspond one to one with the positions of the installation holes.

[0027] Furthermore, the air outlet includes a plurality of first air outlets,

[0028] Along the axial direction of the air inlet pipe, the plurality of first air outlet holes are evenly spaced; along the circumferential direction of the air inlet pipe, any two adjacent rows of the first air outlet holes are staggered;

[0029] The diameter of any of the first air outlet holes is 7 to 9 mm;

[0030] The interval between any two adjacent first air outlet holes along the axial direction of the air inlet pipe is 6 to 8 mm;

[0031] Along the circumference of the air inlet pipe, the interval between any two adjacent first air outlet holes is 6 to 8 mm.

[0032] Furthermore, the air outlet further comprises a plurality of second air outlets, which are provided on a side of the first air outlet away from the extension portion, and the plurality of second air outlets are evenly spaced along the axial direction and the circumferential direction of the air inlet pipe;

[0033] The diameter of any of the second air outlet holes is 6 to 7 mm;

[0034] The interval between any two adjacent second air outlet holes along the axial direction of the air inlet pipe is 7 to 9 mm;

[0035] Along the circumference of the air inlet pipe, the interval between any two adjacent second air outlet holes is 11-12 mm.

[0036] Furthermore, a catalyst assembly is provided in the cylinder, and the catalyst assembly includes:

[0037] A catalyst carrier is disposed in the cylinder;

[0038] The catalyst liner is arranged between the catalyst carrier and the inner wall of the cylinder, and the catalyst liner can fix the catalyst carrier.

[0039] The beneficial effects of the technical solution provided by the embodiment of the utility model are:

[0040] The non-road exhaust gas after-treatment device provided by the embodiment of the present invention extends the cylinder heat insulation cover to the bottom plate flange and is fixedly connected to the enclosure heat insulation cover, thereby greatly reducing the number of welds, improving safety performance, facilitating easy production and assembly, and reducing costs. The cylinder and the bottom plate flange are fixedly connected by a bracket assembly, and the overall structure is stable, firm, strong, and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a cross-sectional view of a non-road exhaust gas after-treatment device in an embodiment of the present utility model.

[0042] Figure 2 This is a partial structural diagram of a non-road exhaust gas after-treatment device in an embodiment of the present utility model.

[0043] Figure 3 It is a structural schematic diagram of the bracket assembly and the base plate flange in an embodiment of the present utility model. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal connections between two components; they can refer to wireless connections or wired connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0047] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] The present invention provides a non-road exhaust gas after-treatment device, comprising:

[0049] Bottom plate flange 1,

[0050] The cylinder 2 is provided on one side of the bottom flange 1. The cylinder 2 extends axially. An end cap 21 is provided at one end of the cylinder 2 close to the bottom flange 1.

[0051] an air inlet pipe 3, the air inlet pipe 3 being disposed at one end of the cylinder 2 close to the end cover 21 and sealing the end of the cylinder 2 together with the end cover 21; the air inlet pipe 3 extending radially along the cylinder 2; one end of the air inlet pipe 3 being disposed within the cylinder 2, and the other end being disposed outside the cylinder 2 and extending toward the outside of the cylinder 2 to form an extension portion; a portion of the air inlet pipe 3 located within the cylinder 2 being provided with a plurality of air outlet holes 31;

[0052] The heat shield assembly 4 comprises:

[0053] The cylinder heat insulation cover 41 is sleeved on the outer side of the cylinder 2, one end of the cylinder heat insulation cover 41 is fixedly connected to the end of the cylinder 2 away from the bottom plate flange 1, and the other end is fixedly connected to the bottom plate flange 1. The cylinder heat insulation cover 41 is provided with a through hole for the air intake pipe 3 to pass through.

[0054] The enclosure heat insulation cover 42 is sleeved on the extension portion of the intake pipe 3 , and the enclosure heat insulation cover 42 is fixedly connected to the cylinder heat insulation cover 41 ;

[0055] The bracket assembly 5 is used to fixedly connect the end cover 21 and the base plate flange 1 .

[0056] In a specific embodiment, Figure 1 and Figure 2 As shown, the cylinder 2 is provided on the upper side of the base flange 1, the cylinder 2 extends in the up-down direction, and the end cover 21 is provided at the lower end. The air intake pipe 3 is also provided at the lower end of the cylinder 2, and the lower end of the cylinder 2 is sealed together with the end cover 21. The cylinder 2, the air intake pipe 3, and the end cover 21 are fixedly connected to form a whole, and are fixed to the base flange 1 by the bracket assembly 5. The structural design is reasonable, stable and firm.

[0057] like Figure 1 As shown, the air intake pipe 3 extends in the left-right direction. The left end of the air intake pipe 3 is located in the cylinder 2. The air outlet hole 31 is provided on the air intake pipe 3. The right end of the air intake pipe 3 is located outside the cylinder 2. Gas enters the air intake pipe 3 from the right end, flows out from the air outlet hole 31, and then passes through the cylinder 2. Furthermore, an air intake flange is provided at one end of the air intake pipe 3 near the extension portion, which facilitates the installation of the air intake pipe 3.

[0058] The cylinder heat shield 41 extends from the upper end of the cylinder 2 to the bottom plate flange 1, and is provided with the through hole on the right side. The right end of the intake pipe 3 passes through the through hole, and the enclosure heat shield 42 is sleeved on the extension. The cylinder heat shield 41 and the enclosure heat shield 42 can both play a role in heat insulation and heat preservation, further enhancing the heat insulation effect of the non-road exhaust gas after-treatment device. The cylinder heat shield 41 can be an integrally formed cylindrical heat shield with the through hole provided thereon, or it can be formed by splicing and fixing two semicircular heat shields, and a groove is provided on any of the semicircular heat shields. When the two semicircular heat shields are combined, the groove forms the through hole. Similarly, the enclosure heat shield 42 can also be an integrally formed cylindrical heat shield, or it can be spliced ​​and fixed by two semicircular heat shields. The overall structure has few welds, is easy to manufacture and assemble, has few parts, and is low in cost.

[0059] The specific configuration of the bracket assembly 5 is not limited. In a specific embodiment, the bracket assembly 5 includes:

[0060] Bottom plate 51, fixedly connected to the bottom plate flange 1;

[0061] a first side plate 52 , one side of which is fixedly connected to one side of the bottom plate 51 , and the other side of which is fixedly connected to the end cover 21 ;

[0062] The second side plate 53 has one side fixedly connected to the other side of the bottom plate 51 , and the other side fixedly connected to the end cover 21 .

[0063] like Figure 3 As shown, the bottom plate 51, the first side plate 52 and the second side plate 53 can be integrally formed, or can be separately provided and then welded together to form a whole. The bracket assembly 5 can play the role of double-layer heat insulation, and can also enhance the stability of the connection between the end cover 21 and the bottom plate flange 1, thereby improving the reliability of the non-road exhaust gas after-treatment device.

[0064] In this embodiment, the interval between the first side plate 52 and the second side plate 53 can be adaptively adjusted according to actual needs. In one embodiment, the first side plate 52 and the second side plate 53 are arranged in parallel.

[0065] In another embodiment, the spacing between the first side panel 52 and the second side panel 53 gradually increases from the side close to the bottom panel 51 to the side away from the bottom panel 51, thereby forming an inverted trapezoidal structure. This structural design is more stable and improves the structural strength of the bracket assembly 5.

[0066] Furthermore, the angle between the first side plate 52 and the bottom plate 51 is 110-130°;

[0067] And / or, the included angle between the second side plate 53 and the bottom plate 51 is 110-130°.

[0068] Furthermore, the included angle between the first side plate 52 and the bottom plate 51 and the included angle between the second side plate 53 and the bottom plate 51 are both 120°, at which angle the structure of the bracket assembly 5 is most stable.

[0069] In the bracket assembly 5, the connection method between the first side plate 52, the second side plate 53 and the end cover 21 is not limited. In a specific embodiment, Figure 3 As shown, a first extension portion 55 is further provided on a side of the first side plate 52 facing away from the bottom plate 51 , and the first extension portion 55 is in contact with and fixedly connected to the end cover 21 ;

[0070] And / or, a second extension portion 54 is further provided on the side of the second side plate 53 facing away from the bottom plate 51, and the second extension portion 54 is in contact with and fixedly connected to the end cover 21, and the first extension portion 55 and the end cover 21, and the second side plate 53 and the end cover 21 can be welded.

[0071] In the bracket assembly 5, the connection method between the bottom plate 51 and the bottom plate flange 1 is also not limited. In a specific embodiment, the bottom plate 51 is provided with a mounting hole.

[0072] The bottom plate flange 1 is provided with an assembly hole.

[0073] The bracket assembly 5 is further provided with mounting screws 56, which pass through the assembly holes and are threadedly engaged with the mounting holes. It will be appreciated that the number and position of the assembly holes correspond one-to-one with the number and position of the mounting holes. The bracket assembly 5 is fixedly connected to the base plate flange 1 using the mounting screws 56, making it easy to disassemble and replace the bracket assembly 5, thereby facilitating subsequent maintenance.

[0074] The number and position of the mounting holes and the assembly holes can be adjusted according to actual needs. Figure 3 As shown, the bottom plate 51 is provided with four mounting holes, and the four mounting holes are distributed at the four corners of the bottom plate 51;

[0075] The bottom plate flange 1 is provided with four assembly holes, and the positions of the assembly holes correspond one to one with the positions of the installation holes. The structure is reasonably distributed and stable.

[0076] Furthermore, the air outlet 31 includes a plurality of first air outlets 311.

[0077] Along the axial direction of the air inlet pipe 3, the first air outlet holes 311 are evenly spaced; along the circumferential direction of the air inlet pipe 3, any two adjacent rows of the first air outlet holes 311 are staggered.

[0078] The diameter of any of the first air outlet holes 311 is 7 to 9 mm;

[0079] Along the axial direction of the air inlet pipe 3, the interval between any two adjacent first air outlet holes 311 is 6 to 8 mm;

[0080] Along the circumference of the air inlet pipe 3 , the interval between any two adjacent first air outlet holes 311 is 6 to 8 mm.

[0081] Furthermore, the air outlet 31 further includes a plurality of second air outlets 312, which are provided on a side of the first air outlet 311 away from the extension portion, and the plurality of second air outlets 312 are evenly spaced along the axial and circumferential directions of the air inlet pipe 3;

[0082] The diameter of any of the second air outlet holes 312 is 6-7 mm;

[0083] Along the axial direction of the air inlet pipe 3, the interval between any two adjacent second air outlet holes 312 is 7 to 9 mm;

[0084] Along the circumference of the air inlet pipe 3 , the interval between any two adjacent second air outlet holes 312 is 11-12 mm.

[0085] like Figure 1 As shown, on the intake pipe 3, the second air outlet 312 is on the left side, and the first air outlet 311 is on the right side. The first air outlet 311 can play a role in silencer, reducing the noise of the gas flowing through the non-road exhaust after-treatment device, and the second air outlet 312 can reduce the back pressure of the intake pipe 3.

[0086] Furthermore, a catalyst assembly 22 is further provided in the cylinder 2, and the catalyst assembly 22 includes:

[0087] The catalyst carrier 221 is provided in the cylinder 2;

[0088] The catalyst liner 222 is disposed between the catalyst carrier 221 and the inner wall of the cylinder 2 , and the catalyst liner 222 can fix the catalyst carrier 221 .

[0089] The present application does not limit the type and level of the catalyst carrier 221. In a specific embodiment, the cylinder 2 is equipped with an SCR catalyst carrier 221, a DPF catalyst carrier 221, and a DOC catalyst carrier 221 from bottom to top, and the three catalyst carriers 221 are all fixed in the cylinder 2 by the catalyst liner 222.

[0090] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A non-road exhaust gas post-treatment device, characterized in that: include: Base plate flange (1), A cylinder (2) is provided on one side of the bottom flange (1), the cylinder (2) extends in the axial direction, and an end cover (21) is provided at one end of the cylinder (2) close to the bottom flange (1); An air intake pipe (3), the air intake pipe (3) being arranged at one end of the cylinder (2) close to the end cover (21) and sealing the end of the cylinder (2) together with the end cover (21), the air intake pipe (3) extending in the radial direction of the cylinder (2), one end of the air intake pipe (3) being arranged in the cylinder (2), and the other end being arranged outside the cylinder (2) and extending toward the outside of the cylinder (2) to form an extension portion, and a portion of the air intake pipe (3) located in the cylinder (2) being provided with a plurality of air outlet holes (31); The heat shield assembly (4) comprises: a barrel heat insulation cover (41) sleeved on the outer side of the barrel (2), one end of the barrel heat insulation cover (41) being fixedly connected to one end of the barrel (2) away from the bottom plate flange (1), and the other end being fixedly connected to the bottom plate flange (1), and a through hole being provided on the barrel heat insulation cover (41), for the air inlet pipe (3) to pass through; An enclosure heat insulation cover (42) is sleeved on the extension portion of the air inlet pipe (3), and the enclosure heat insulation cover (42) is fixedly connected to the cylinder heat insulation cover (41); A bracket assembly (5) fixedly connects the end cover (21) and the base plate flange (1).

2. The non-road exhaust gas after-treatment device according to claim 1, characterized in that: The bracket assembly (5) comprises: A bottom plate (51) fixedly connected to the bottom plate flange (1); a first side plate (52), one side of the first side plate (52) being fixedly connected to one side of the bottom plate (51), and the other side of the first side plate (52) being fixedly connected to the end cover (21); A second side plate (53), one side of the second side plate (53) is fixedly connected to the other side of the bottom plate (51), and the other side of the second side plate (53) is fixedly connected to the end cover (21).

3. The non-road exhaust gas after-treatment device according to claim 2, characterized in that: The interval between the first side plate (52) and the second side plate (53) gradually increases from a side close to the bottom plate (51) to a side away from the bottom plate (51).

4. The non-road exhaust gas after-treatment device according to claim 2, characterized in that: The included angle between the first side plate (52) and the bottom plate (51) is 110-130°; And / or, the angle between the second side plate (53) and the bottom plate (51) is 110-130°.

5. The non-road exhaust gas after-treatment device according to claim 2, characterized in that: A first extension portion (55) is further provided on a side of the first side plate (52) facing away from the bottom plate (51), and the first extension portion (55) is fitted with and fixedly connected to the end cover (21); And / or, a second extension portion (54) is further provided on a side of the second side plate (53) facing away from the bottom plate (51), and the second extension portion (54) is fitted with and fixedly connected to the end cover (21).

6. The non-road exhaust gas post-treatment device according to claim 2, characterized in that: The bottom plate (51) is provided with a mounting hole. The bottom plate flange (1) is provided with an assembly hole. It also includes a mounting screw (56), which passes through the assembly hole and is threadedly connected to the mounting hole.

7. The non-road exhaust gas after-treatment device according to claim 6, characterized in that: The bottom plate (51) is provided with four mounting holes, and the four mounting holes are distributed at the four corners of the bottom plate (51); Four assembly holes are provided on the bottom plate flange (1), and the positions of the assembly holes correspond one to one with the positions of the installation holes.

8. The non-road exhaust gas after-treatment device according to claim 1, characterized in that: The air outlet holes (31) include a plurality of first air outlet holes (311), Along the axial direction of the air inlet pipe (3), the plurality of first air outlet holes (311) are distributed at equal intervals; along the circumferential direction of the air inlet pipe (3), any two adjacent rows of the first air outlet holes (311) are distributed in a staggered manner; The diameter of any one of the first air outlet holes (311) is 7 to 9 mm; Along the axial direction of the air inlet pipe (3), the interval between any two adjacent first air outlet holes (311) is 6 to 8 mm; Along the circumference of the air inlet pipe (3), the interval between any two adjacent first air outlet holes (311) is 6 to 8 mm.

9. The non-road exhaust gas after-treatment device according to claim 8, characterized in that: The air outlet hole (31) further comprises a plurality of second air outlet holes (312) which are arranged on a side of the first air outlet hole (311) away from the extension portion, and the plurality of second air outlet holes (312) are distributed at equal intervals along the axial direction and the circumferential direction of the air inlet pipe (3); The diameter of any one of the second air outlet holes (312) is 6 to 7 mm; Along the axial direction of the air inlet pipe (3), the interval between any two adjacent second air outlet holes (312) is 7 to 9 mm; Along the circumferential direction of the air inlet pipe (3), the interval between any two adjacent second air outlet holes (312) is 11-12 mm.

10. The non-road exhaust gas after-treatment device according to claim 1, characterized in that: A catalyst assembly (22) is further provided in the cylinder (2), and the catalyst assembly (22) comprises: A catalyst carrier (221) is disposed in the cylinder (2); A catalyst liner (222) is provided between the catalyst carrier (221) and the inner wall of the cylinder (2), and the catalyst liner (222) is capable of fixing the catalyst carrier (221).

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