Side air inlet mixing device

Abstract

The utility model provides a side air inlet mixing device which comprises a cylinder body, an air inlet pipe, an air outlet pipe, an air inlet pipe, a gas inlet pipe, a gas outlet pipe, a gas outlet pipe and a gas outlet pipe, wherein one end of the cylinder body is provided with an end cover, and an air inlet hole is formed between the cylinder body and the end cover; the gas inlet pipe assembly is arranged in the gas inlet hole, and the gas inlet pipe assembly is used for allowing tail gas to enter; the spoiler is arranged in the barrel and fixedly connected with the inner side of the end cover, spoiler holes are formed in the spoiler, the catalyst assembly is fixedly arranged in the barrel and arranged on the side, away from the end cover, of the spoiler, and the catalyst assembly and the spoiler are arranged at intervals; and the sensor base assembly is arranged on the side wall of the cylinder body. The side air inlet mixing device provided by the embodiment of the utility model is simple in structure, the spoiler is beneficial to scattering and diffusing air flow, so that the air flow and DOC are mixed more sufficiently, the reaction efficiency of the DOC is improved, the risk of blockage of a catalyst carrier is reduced, the temperature before DPF is increased, and stable operation of a system is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engine tail gas post-processing, and particularly relates to a side intake mixing device. Background Art

[0002] DOC is a diesel oxidation catalyst, which is mainly used to convert carbon monoxide (CO) and hydrocarbons (HC) in diesel engine exhaust into harmless water (H20) and carbon dioxide (CO2). At present, no matter what post-treatment route is taken, DOC is standard in the diesel exhaust system, and it is used in combination with other exhaust post-treatment technologies (diesel particulate filter (DPF), selective catalytic reduction catalyst (SCR), etc.) to meet the stricter emission regulations of diesel engines.

[0003] Since the DOC is usually arranged after the engine supercharger and before the DPF, if the velocity vectors in front of the cross section of the DOC carrier (51) are very different (i.e., the DOC velocity uniformity is low), the HC in the exhaust gas is mixed unevenly in front of the DOC end face, the DOC carrier availability is reduced, the reaction efficiency is low, the HC is not fully oxidized, and adsorption and accumulation on the DOC carrier end face will cause the carrier to age and clog quickly, resulting in vehicle failure, etc. In addition, in order to match the loading boundary, it is usually necessary to compress the size of the intake mixing unit, but without sufficient mixing distance, the velocity uniformity index of the DOC cannot be met. Summary of the invention

[0004] In order to solve at least one technical problem in the prior art, the embodiment of the utility model provides a side intake mixing device with a simple structure and good turbulence effect. In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:

[0005] The present invention provides a side air intake mixing device, comprising:

[0006] A cylinder, one end of which is provided with an end cover, an air inlet is provided between the cylinder and the end cover, and the other end of the cylinder is an air outlet;

[0007] An air intake pipe assembly is arranged in the air intake hole, and the air intake pipe assembly is used for the exhaust gas to enter;

[0008] A spoiler is arranged in the cylinder and fixedly connected to the inner side of the end cover, and the spoiler is provided with a spoiler hole.

[0009] A catalyst assembly is fixedly arranged in the cylinder and arranged on a side of the spoiler away from the end cover, and the catalyst assembly is spaced apart from the spoiler;

[0010] The sensor base assembly is arranged on the side wall of the cylinder.

[0011] Further, the spoiler comprises:

[0012] A top plate, arranged at the air inlet and spaced apart from the air inlet, wherein a first spoiler hole is provided on the top plate;

[0013] A bottom plate is arranged on a side of the top plate away from the air inlet and spaced apart from the top plate, and a second spoiler hole is arranged on the bottom plate;

[0014] A side plate, one side of which is fixedly connected to a side of the top plate close to the catalyst assembly, and the other side of which is fixedly connected to a side of the bottom plate close to the catalyst assembly, and a third spoiler hole is provided on the side plate.

[0015] Further, the angle between the side plate and the top plate is a first angle, and the first angle is an acute angle;

[0016] And / or, the angle between the side plate and the bottom plate is a second angle, and the second angle is an obtuse angle.

[0017] Furthermore, the first angle is 10 to 25°;

[0018] And / or, the second angle is 100-125°.

[0019] Further, any of the first spoiler holes is a rectangular hole, and any of the first spoiler holes has a length of 40 to 50 mm and a width of 12 to 18 mm;

[0020] And / or, any of the second spoiler holes is a circular hole, and the diameter of any of the second spoiler holes is 5 to 7 mm;

[0021] And / or, any one of the third spoiler holes is a circular hole, and a diameter of any one of the third spoiler holes is 5 to 7 mm.

[0022] Furthermore, the interval between any two adjacent first spoiler holes is 12 to 18 mm;

[0023] and / or, the interval between any two adjacent second spoiler holes is 8 to 12 mm;

[0024] And / or, the interval between any two adjacent third spoiler holes is 8-12 mm.

[0025] Furthermore, the air intake pipe assembly comprises:

[0026] An air intake pipe is provided on the air intake hole, the air intake pipe extends radially, and the cross-sectional area of ​​the air intake pipe gradually increases from an end away from the spoiler to an end close to the spoiler;

[0027] An air intake flange is used to fixedly connect the air intake pipe and the air intake hole.

[0028] Furthermore, the catalyst assembly comprises:

[0029] A DOC carrier is disposed in the cylinder and spaced apart from the spoiler;

[0030] A DOC gasket is disposed between the DOC carrier and the cylinder, and the DOC gasket can fix the position of the DOC carrier.

[0031] Furthermore, the catalyst assembly further comprises:

[0032] A DPF carrier is arranged in the cylinder and on a side of the DOC carrier away from the spoiler, and the DPF carrier is spaced apart from the DOC carrier;

[0033] The DPF gasket is disposed between the DPF carrier and the cylinder, and the DPF gasket can fix the position of the DPF carrier.

[0034] Furthermore, the sensor base assembly comprises:

[0035] a first sensor base, disposed on the cylinder and outside the DOC pad, the first sensor base being used to mount a temperature sensor;

[0036] and / or, a second sensor base, disposed on the cylinder and on the outside of the DOC liner, the second sensor base being used for mounting a NOx sensor;

[0037] And / or, a third sensor base is arranged on the cylinder and on the outer side of the DPF gasket, and the third sensor base is used to install a temperature sensor.

[0038] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0039] (1) The side air intake mixing device provided in the embodiment of the utility model makes full use of the limited mixing space, and has a compact and simple structure. A large hole is provided on the top plate of the spoiler to help break up the airflow, and small holes are provided on the side plate and the bottom plate to help diffuse the airflow. This structure allows the airflow to mix more fully with the DOC, improves the reaction efficiency of the DOC, effectively guarantees the speed uniformity index, reduces the risk of catalyst carrier blockage, increases the temperature before the DPF, and ensures stable operation of the system.

[0040] (2) The side air intake mixing device provided in the embodiment of the utility model has a simple preparation process and is integrally formed, which can reduce the cost of tooling and molds and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic structural diagram of the side air intake mixing device in the embodiment of the present utility model.

[0042] Figure 2 This is an exploded view of the side air intake mixing device in the embodiment of the present utility model.

[0043] Figure 3 This is a schematic structural diagram of the spoiler in the embodiment of the present utility model.

[0044] Figure 4 This is the front view of the spoiler in the embodiment of the present utility model. Detailed implementation manners

[0045] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be 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 utility model and are not used to limit the present utility model.

[0046] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0047] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can also be the communication inside two elements. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0048] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0049] The embodiment of the present utility model provides a side air intake mixing device, including:

[0050] A cylinder 1, one end of which is provided with an end cover 2, an air inlet 1a is provided between the cylinder 1 and the end cover 2, and the other end of the cylinder 1 is an air outlet 1b;

[0051] An air intake pipe assembly 3 is provided in the air intake hole 1a, and the air intake pipe assembly 3 is used for the exhaust gas to enter;

[0052] The spoiler 4 is arranged in the cylinder 1 and fixedly connected to the inner side of the end cover 2. The spoiler 4 is provided with spoiler holes.

[0053] A catalyst assembly 5 is fixedly arranged in the cylinder 1 and arranged on a side of the spoiler 4 away from the end cover 2, and the catalyst assembly 5 is spaced apart from the spoiler 4;

[0054] The sensor base assembly 6 is arranged on the side wall of the cylinder 1 .

[0055] In a specific embodiment, Figure 1 and Figure 2 As shown, the left upper end of the cylinder 1 is provided with a first notch, the upper end of the end cover 2 is provided with a second notch, and the air inlet 1a is formed between the first notch and the second notch. The spoiler 4 is fixedly connected to the end cover 2, and since the air inlet 1a is provided between the cylinder 1 and the end cover 2, it can be understood that the spoiler 4 is arranged below the air inlet 1a. When the gas enters the cylinder 1 from the intake pipe assembly 3, the spoiler 4 can play a role in disturbing the airflow. The airflow disturbed by the spoiler 4 is processed by the catalyst assembly 5 in the cylinder 1 and then flows out from the outlet end 1b of the cylinder 1. The structure is simple, and the spoiler 4 buffers the airflow to ensure that the airflow is fully mixed with the catalyst assembly 5, so as to avoid the local aging of the catalyst assembly 5 caused by the excessive airflow velocity, and prolong the service life of the side intake mixing device.

[0056] The spoiler 4 is fixedly connected to the end cover 2 in any manner. For example, the spoiler 4 can be spot welded to the end cover 2, or the side of the spoiler 4 can be fixed to the end cover 2 by screws.

[0057] The structure of the spoiler 4 is not limited. In a specific embodiment, the spoiler 4 includes:

[0058] A top plate 41 is disposed at the air inlet 1a and spaced apart from the air inlet 1a, and a first spoiler hole 41a is provided on the top plate 41;

[0059] The bottom plate 42 is disposed on a side of the top plate 41 away from the air inlet 1a and is spaced apart from the top plate 41. The bottom plate 42 is provided with a second spoiler hole 42a.

[0060] A side plate 43, one side of the side plate 43 is fixedly connected to one side of the top plate 41 close to the catalyst assembly 5, the other side of the side plate 43 is fixedly connected to one side of the bottom plate 42 close to the catalyst assembly 5, and a third flow disturbing hole 43a is provided on the side plate 43.

[0061] As Figure 2 and Figure 3 shown, air flow enters the side air intake mixing device from the air intake hole 1a. The first flow disturbing plate 4 on the top plate 41 can break up the air flow and play a buffering role on the air flow. The second flow disturbing hole 42a on the bottom plate 42 and the third flow disturbing hole 43a on the side plate 43 can block the strong direct impact air flow, thereby promoting the full mixing of the air flow and the catalyst assembly 5, improving the reaction efficiency of the catalyst assembly 5, preventing the rapid aging of the catalyst assembly 5, and effectively ensuring the high-speed uniformity index at the front end of the catalyst assembly 5. The flow disturbing plate 4 has a simple structure and low manufacturing cost.

[0062] In the present application, the angle of the side plate 43, the shapes, sizes, numbers and positions of the first flow disturbing hole 41a, the second flow disturbing hole 42a and the third flow disturbing hole 43a can be adaptively adjusted according to actual needs.

[0063] Further, a first included angle A between the side plate 43 and the top plate 41 is an acute angle;

[0064] and / or, an included angle between the side plate 43 and the bottom plate 42 is a second included angle B, and the second included angle B is an obtuse angle. As Figure 3 and Figure 4 shown, the side plate 43 is inclined, which is more conducive to the collision between the flow disturbing plate 4 and the air flow, and improves the flow disturbing effect on the exhaust gas air flow. The inclined angle of the side plate 43 is not limited. In a specific embodiment, the first included angle A is 10-25°;

[0065] and / or, the second included angle B is 100-125°, and the flow disturbing effect of the flow disturbing plate 4 is better at this angle.

[0066] Further, any one of the first flow disturbing holes 41a is a rectangular hole, the length of any one of the first flow disturbing holes 41a is 40-50 mm, and the width is 12-18 mm;

[0067] and / or, any one of the second flow disturbing holes 42a is a circular hole, and the diameter of any one of the second flow disturbing holes 42a is 5-7 mm;

[0068] and / or, any one of the third flow disturbing holes 43a is a circular hole, and the diameter of any one of the third flow disturbing holes 43a is 5-7 mm.

[0069] It is understandable that the area of the first spoiler hole 41a is relatively large, which is conducive to the inflow of air into the side air intake mixing device, reducing the back pressure, and at the same time can buffer the air flow. While the areas of the second spoiler hole 42a and the third spoiler hole 43a are relatively small, which helps to disperse the air flow. This structural design improves the spoiler effect on the air flow, promotes the full mixing of the air flow with the catalyst assembly 5, and improves the reaction efficiency of the catalyst assembly 5.

[0070] The number and positions of the first spoiler holes 41a on the top plate 41, the number and positions of the second spoiler holes 42a on the side plate 43, and the number and positions of the third spoiler holes 43a on the bottom plate 42 are not limited. In a specific embodiment, as Figure 3 shown, six first spoiler holes 41a are provided on the top plate 41, and the six first spoiler holes 41a are arranged at equal intervals.

[0071] Further, the interval between any two adjacent first spoiler holes 41a is 12 - 18 mm;

[0072] and / or, the interval between any two adjacent second spoiler holes 42a is 8 - 12 mm;

[0073] and / or, the interval between any two adjacent third spoiler holes 43a is 8 - 12 mm. This structural distribution is conducive to improving the spoiler effect on the air flow. The air flow after being spoiler by the spoiler plate 4 is relatively stable, which is beneficial to ensuring the stable and good sensor signal when the air flow passes through the sensor on the sensor base assembly 6 on the cylinder body 1.

[0074] Further, the intake pipe assembly 3 includes:

[0075] An intake pipe 31, which is arranged on the intake hole 1a, the intake pipe 31 extends radially, and the cross-sectional area of the intake pipe 31 gradually increases from the end away from the spoiler plate 4 to the end close to the spoiler plate 4;

[0076] An intake flange 32, which fixedly connects the intake pipe 31 and the intake hole 1a.

[0077] As Figure 1 shown, the exhaust gas air flow enters the side air intake mixing device through the intake pipe 31. Due to the inertia effect, the air flow directly rushes into the cylinder body 1 through the intake pipe 31. Since the cross-sectional area of the intake pipe 31 gradually increases from top to bottom, it can further expand the diffusion area of the air flow, thereby improving the spoiler effect of the spoiler plate 4 on the air flow.

[0078] Further, the catalyst assembly 5 includes:

[0079] The DOC carrier 51 is disposed in the cylinder 1 and spaced apart from the spoiler 4;

[0080] The DOC gasket 52 is disposed between the DOC carrier 51 and the cylinder 1 , and the DOC gasket 52 can fix the position of the DOC carrier 51 .

[0081] It should be noted that the distance between the side of the DOC close to the spoiler 4 and the spoiler 4 can be adaptively adjusted according to actual needs. Furthermore, the distance between the end of the side panel close to the DOC carrier and the DOC carrier is 40 to 45 cm. The DOC can convert carbon monoxide and hydrocarbons in the exhaust gas into harmless water and carbon dioxide.

[0082] Furthermore, the catalyst assembly 5 further comprises:

[0083] A DPF carrier 53 is disposed in the cylinder 1 and on a side of the DOC carrier 51 away from the spoiler 4, and the DPF carrier 53 is spaced apart from the DOC carrier 51;

[0084] The DPF gasket 54 is disposed between the DPF carrier 53 and the cylinder 1 , and the DPF gasket 54 can fix the position of the DPF carrier 53 .

[0085] The DPF substrate 53 can reduce the emission of particulate matter in the exhaust gas.

[0086] The present application does not limit the type and quantity of the catalyst carrier in the catalyst assembly 5. In addition to the DOC carrier 51 (diesel oxidation catalyst) and the DPF carrier 53 (diesel particulate filter) mentioned in the present application, the catalyst assembly 5 can also be a TWC (carrier three-way catalyst), SCR (carrier selective catalytic reduction catalyst), and multiple stages of the DOC carrier 51 can also be provided. Therefore, the present application can be applied to any exhaust device with a side intake cylinder structure, and has a wide range of applications.

[0087] Furthermore, the sensor base assembly 6 comprises:

[0088] A first sensor base 61 is provided on the cylinder 1 and outside the DOC gasket 52, and the first sensor base 61 is used to install a temperature sensor;

[0089] and / or, a second sensor base 62, provided on the cylinder 1 and outside the DOC gasket 52, the second sensor base 62 being used for mounting a NOx sensor;

[0090] And / or, a third sensor base 63 is disposed on the cylinder body 1 and outside the DPF gasket 54, and the third sensor base 63 is used for installing a temperature sensor.

[0091] Wherein, a temperature sensor is installed on the first sensor base 61, and the temperature sensor can detect the temperature of the air flow after passing through the DPF carrier 53. A temperature sensor is also installed on the third sensor base 63, and the temperature sensor can detect the temperature of the air flow after passing through the DPF carrier 53. The second sensor installs a NOx sensor, which can detect nitrogen oxides in the air flow. In this application, due to the flow disturbing effect of the flow disturbing plate 4 on the air flow, the mixing effect of the air flow and the catalyst assembly 5 can be ensured, the smoothness of the air flow when it reaches the catalyst assembly 5 can be ensured, and further the detection effect of the sensor assembly can be ensured.

[0092] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A side intake mixing device, characterized in that: include: A cylinder (1), one end of the cylinder (1) being provided with an end cover (2), an air inlet (1a) being provided between the cylinder (1) and the end cover (2), and the other end of the cylinder (1) being an air outlet (1b); An air intake pipe assembly (3) is arranged in the air intake hole (1a), and the air intake pipe assembly (3) is used for exhaust gas to enter; A spoiler (4) is disposed in the cylinder (1) and fixedly connected to the inner side of the end cover (2), and a spoiler hole is provided on the spoiler (4). a catalyst assembly (5) fixedly arranged in the cylinder (1) and arranged on a side of the spoiler (4) away from the end cover (2), the catalyst assembly (5) and the spoiler (4) being arranged at a distance; The sensor base assembly (6) is arranged on the side wall of the cylinder (1).

2. The side intake mixing device according to claim 1, characterized in that: The spoiler (4) comprises: A top plate (41) is disposed at the air inlet hole (1a) and is spaced apart from the air inlet hole (1a); a first spoiler hole (41a) is provided on the top plate (41); A bottom plate (42) is arranged on a side of the top plate (41) away from the air inlet hole (1a) and is spaced apart from the top plate (41); a second spoiler hole (42a) is provided on the bottom plate (42); A side plate (43), one side of the side plate (43) being fixedly connected to a side of the top plate (41) close to the catalyst assembly (5), and the other side of the side plate (43) being fixedly connected to a side of the bottom plate (42) close to the catalyst assembly (5), and a third spoiler hole (43a) being provided on the side plate (43).

3. The side intake mixing device according to claim 2, characterized in that: The angle between the side plate (43) and the top plate (41) is a first angle (A), and the first angle (A) is an acute angle; And / or, the angle between the side plate (43) and the bottom plate (42) is a second angle (B), and the second angle (B) is an obtuse angle.

4. The side intake mixing device according to claim 3, characterized in that: The first angle (A) is 10 to 25°; And / or, the second angle (B) is 100-125°.

5. The side intake mixing device according to claim 2, characterized in that: Any of the first spoiler holes (41a) is a rectangular hole, and any of the first spoiler holes (41a) has a length of 40 to 50 mm and a width of 12 to 18 mm; And / or, any of the second spoiler holes (42a) is a circular hole, and the diameter of any of the second spoiler holes (42a) is 5 to 7 mm; And / or, any one of the third spoiler holes (43a) is a circular hole, and the diameter of any one of the third spoiler holes (43a) is 5 to 7 mm.

6. The side intake mixing device according to claim 2, characterized in that: The interval between any two adjacent first spoiler holes (41a) is 12 to 18 mm; and / or, the interval between any two adjacent second spoiler holes (42a) is 8 to 12 mm; And / or, the interval between any two adjacent third spoiler holes (43a) is 8 to 12 mm.

7. The side intake mixing device according to claim 1, characterized in that: The air intake pipe assembly (3) comprises: an air intake pipe (31) disposed on the air intake hole (1a), the air intake pipe (31) extending in a radial direction, and a cross-sectional area of ​​the air intake pipe (31) gradually increasing from an end away from the spoiler (4) to an end close to the spoiler (4); An air intake flange (32) fixedly connects the air intake pipe (31) and the air intake hole (1a).

8. The side intake mixing device according to claim 1, characterized in that: The catalyst assembly (5) comprises: A DOC carrier (51) is disposed in the cylinder (1) and is spaced apart from the spoiler (4); A DOC gasket (52) is provided between the DOC carrier (51) and the cylinder (1), and the DOC gasket (52) is capable of fixing the position of the DOC carrier (51).

9. The side intake mixing device according to claim 8, characterized in that: The catalyst assembly (5) further comprises: A DPF carrier (53) is arranged in the cylinder (1) and on a side of the DOC carrier (51) facing away from the spoiler (4), the DPF carrier (53) and the DOC carrier (51) being arranged at a distance from each other; A DPF gasket (54) is provided between the DPF carrier (53) and the cylinder (1), and the DPF gasket (54) is capable of fixing the position of the DPF carrier (53).

10. The side intake mixing device according to claim 9, characterized in that: The sensor base assembly (6) comprises: a first sensor base (61) disposed on the cylinder (1) and on the outside of the DOC gasket (52), the first sensor base (61) being used to mount a temperature sensor; and / or, a second sensor base (62) disposed on the cylinder (1) and on the outside of the DOC gasket (52), the second sensor base (62) being used for mounting a NOx sensor; And / or, a third sensor base (63) is arranged on the cylinder (1) and on the outside of the DPF gasket (54), and the third sensor base (63) is used to install a temperature sensor.

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