Cylinder type urea mixing device

Abstract

The application provides a barrel type urea mixing device, which comprises a barrel body extending in the axial direction, a nozzle mounting seat arranged on the side of the barrel body, an air inlet end and an air outlet end of the barrel body, an air inlet cover plate arranged on the air inlet end, an air inlet arranged on the air inlet cover plate, an air outlet cover plate arranged on the air outlet end, and an air outlet hole arranged on the air outlet cover plate; a mixing assembly arranged in the barrel body and fixedly connected with the barrel body, the mixing assembly comprising a cyclone pipe arranged in the radial direction, one end of the cyclone pipe corresponding to the nozzle mounting seat and being arranged in the interval with the nozzle mounting seat, and a cyclone hole arranged on the cyclone pipe; a spoiler arranged on one end of the cyclone pipe close to the nozzle mounting seat; and a breaking plate arranged on one end of the cyclone pipe away from the nozzle mounting seat, and a plurality of breaking holes arranged on the breaking plate. The application has simple structure, small space occupation, and good mixing effect of urea and air flow.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of diesel engine exhaust treatment equipment, and particularly relates to a cylindrical urea mixing device. BACKGROUND

[0002] With the development of diesel engine technology of national VI and non-road T4 aftertreatment, the vehicle manufacturer makes corresponding compression in the space arrangement of the aftertreatment, so that the aftertreatment is very compact, and the urea mixing module in the aftertreatment needs enough space to solve the full mixing of urea and exhaust. The urea mixing module on the market currently occupies a large space, has a complex structure, and has a high manufacturing cost. SUMMARY

[0003] To solve at least one technical problem in the prior art, a cylindrical urea mixing device is provided. To achieve the above technical purpose, the technical scheme adopted by the embodiments of the present application is:

[0004] The embodiments of the present application provide a cylindrical urea mixing device, which comprises:

[0005] A cylinder body extends in an axial direction, a nozzle mounting seat is arranged on the side of the cylinder body, the cylinder body comprises an air inlet end and an air outlet end, an air inlet cover plate is arranged on the air inlet end, an air inlet is arranged on the air inlet cover plate, an air outlet cover plate is arranged on the air outlet end, and an air outlet hole is arranged on the air outlet cover plate;

[0006] A mixing assembly is arranged in the cylinder body and fixedly connected with the cylinder body, and the mixing assembly comprises:

[0007] A cyclone pipe is arranged in a radial direction, one end of the cyclone pipe corresponds to the nozzle mounting seat and is arranged in a spaced manner with the nozzle mounting seat, and a cyclone hole is arranged on the cyclone pipe;

[0008] A spoiler is arranged at one end of the cyclone pipe close to the nozzle mounting seat;

[0009] A breaking plate is arranged at one end of the cyclone pipe away from the nozzle mounting seat, and a plurality of breaking holes are arranged on the breaking plate.

[0010] Further, the air inlet cover plate comprises a first cover plate and a second cover plate, the air inlet is arranged between the first cover plate and the second cover plate, and the height of the air inlet is 20-25 mm.

[0011] Further, the first cover plate is semicircular, has a flat plate structure, and is arranged on one side of the air inlet close to the spoiler;

[0012] The second cover plate is semicircular, protrudes from the cylinder body in a direction away from the cylinder body, and is arranged on one side of the air inlet close to the breaking plate.

[0013] Further, the second cover plate is further provided with a groove, the groove protrudes towards the air outlet end of the cylinder;

[0014] The groove is provided with a groove hole, the groove hole is close to one side of the first cover plate, and the groove is provided with a groove fin close to one side of the air outlet end of the cylinder, and the included angle between the groove fin and the groove is 30-40°.

[0015] Further, the air outlet cover plate is provided with a plurality of air outlet holes, any air outlet hole is a sector, and a plurality of air outlet holes are distributed along the circumference at intervals.

[0016] Further, any swirl hole on the swirl tube is a long hole and extends along the axial direction of the swirl tube;

[0017] One side of any swirl hole and the outer side of the swirl tube are provided with a swirl fin;

[0018] The included angle between any swirl fin and the tangent of the swirl tube is 30-35°.

[0019] Further, the diameter of any breaking hole on the breaking plate is 8-10mm.

[0020] Further, the spoiler plate comprises a first side edge, the first side edge is provided with a first extension part, the first extension part is bent towards the direction of the breaking plate, and the bending angle of the first extension part is 130-150°.

[0021] Further, the spoiler plate comprises a second side edge, the second side edge is provided with a first boss, the first cover plate is provided with a first positioning hole, and the first positioning hole is used for inserting the first boss;

[0022] The breaking plate 23 comprises a third side edge, the third side edge is provided with a second extension part (23b), the second extension part (23b) is bent towards the direction of the spoiler plate 22, and the second extension part (23b) is welded and connected with the inner wall of the cylinder 1.

[0023] Further, a heat shield is further included, the heat shield is sleeved with the cylinder, the end of the heat shield is fixedly connected with the end of the cylinder, and the heat shield and the cylinder are provided with heat insulation materials.

[0024] The technical scheme provided by the embodiment of the application has the beneficial effects that:

[0025] The embodiment of the present application can guide part of the airflow to flow through between the broken plate and the cylinder by designing the air inlet end cover as the first cover plate and the second cover plate which are different in structure, avoid urea crystallization on the inner wall of the cylinder, and ensure that the airflow inside and outside the cyclone tube can contact with urea by arranging the spoiler and the broken plate at two ends of the cyclone tube respectively, and the embodiment of the present application has simple structure, small space occupation, and good urea and airflow mixing effect. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is an installation schematic diagram of the cylindrical urea mixing device in the embodiment of the present application.

[0027] Figure 2 It is an exploded view of the cylindrical urea mixing device in the embodiment of the present application.

[0028] Figure 3 It is a partial detail view of the cylindrical urea mixing device in the embodiment of the present application.

[0029] Figure 4 It is a sectional view of the cylindrical urea mixing device in the embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0031] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the connection between two elements inside, it can be wireless connection, or wired connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as they do not conflict with each other.

[0034] The embodiment of the application provides a barrel type urea mixing device, which comprises:

[0035] A barrel body 1 extends in an axial direction, and a nozzle mounting seat 11 is arranged on the side of the barrel body 1. The barrel body 1 comprises an air inlet end and an air outlet end. The air inlet end is provided with an air inlet cover plate 12, and the air inlet cover plate 12 is provided with an air inlet. The air outlet end is provided with an air outlet cover plate 13, and the air outlet cover plate 13 is provided with an air outlet hole 13a.

[0036] A mixing assembly 2 is arranged in the barrel body 1 and fixedly connected with the barrel body 1. The mixing assembly 2 comprises:

[0037] A cyclone pipe 21 is arranged in a radial direction. One end of the cyclone pipe 21 corresponds to the nozzle mounting seat 11 and is arranged in a spaced manner with the nozzle mounting seat 11. The cyclone pipe 21 is provided with a cyclone hole.

[0038] A spoiler 22 is arranged at one end of the cyclone pipe 21 close to the nozzle mounting seat 11.

[0039] A crushing plate 23 is arranged at one end of the cyclone pipe 21 away from the nozzle mounting seat 11. The crushing plate 23 is provided with a plurality of crushing holes 23a.

[0040] In a specific embodiment, as shown in Figs. Figure 1 , Figure 2 and Figure 4 , the barrel body 1 extends in a left-right direction. The left end is the air inlet end, and the right end is the air outlet end. The nozzle mounting seat 11 is arranged above the barrel body 1.

[0041] The spoiler 22, the cyclone pipe 21 and the crushing plate 23 in the mixing assembly 2 are arranged from top to bottom. The urea nozzle is arranged on the urea nozzle mounting seat 11. The urea nozzle sprays misty urea. Since the upper end of the cyclone pipe 21 is arranged in a spaced manner with the nozzle mounting seat 11, part of the urea enters the cyclone pipe 21, and the other part of the urea is sprayed from the outside of the cyclone pipe 21.

[0042] During operation, the airflow enters the barrel body 1 from the left air inlet end. Most of the airflow directly flows into the cyclone pipe 21 through the cyclone hole and contacts the urea jet in the cyclone pipe 21.

[0043] It should be noted that when the urea nozzle sprays the urea spray, the upper end of the cyclone pipe 21 is in a negative pressure state, thus enabling part of the airflow to flow from the lower end to the upper end of the cyclone pipe 21 and mix with the urea, and most of the mixed gas at this position enters the cyclone pipe 21 under the action of the urea spray, and part of the mixed gas flows outside the cyclone pipe 21 and passes through the breaking plate 23, and the breaking holes 23a break the mixed gas, thus improving the decomposition effect of the urea;

[0044] In addition, a small part of the airflow enters from the lower end, flows out of the upper end through the lower part of the mixing assembly 2, and urea crystallization between the lower end of the cyclone pipe 21 and the barrel 1 can be avoided.

[0045] At the same time, part of the mixed gas in the cyclone pipe 21 can also be sprayed from the right side of the cyclone hole, mixed with the urea outside the cyclone pipe 21, and again divided, part of which flows upwards above the spoiler plate 22, and part of which flows downwards to be broken by the breaking plate 23, so that the airflow and the urea in the barrel type urea mixing device can be mixed and broken multiple times by the spoiler plate 22, the cyclone pipe 21 and the breaking plate 23, and circulate, thus greatly improving the mixing effect of the airflow and the urea.

[0046] The present application has the advantages of simple structure, easy manufacturing, low cost, and improved efficiency of mixing gas and urea spray.

[0047] The present application does not limit the specific configuration of the air inlet cover plate 12 of the air inlet end. In a specific embodiment, the air inlet cover plate 12 includes a first cover plate 121 and a second cover plate 122, and the air inlet is formed between the first cover plate 121 and the second cover plate 122, and the height H of the air inlet is 20-25 mm.

[0048] It should be noted that the height H of the air inlet is not limited, and the height H can be adaptively modified according to actual needs, and the structure can ensure that sufficient airflow can enter the barrel 1.

[0049] Further, the first cover plate 121 is semicircular and has a flat plate structure, and is arranged on one side of the air inlet end close to the spoiler plate 22.

[0050] The second cover plate 122 is semicircular and protrudes from the barrel 1 in a direction away from the barrel 1, and is arranged on one side of the air inlet end close to the breaking plate 23.

[0051] In a specific embodiment, as shown in Figure 4As shown, the first cover plate 121 is arranged above the air inlet end, and the second cover plate 122 is arranged below the air inlet end. Since the first cover plate 121 is a flat plate and the second cover plate 122 protrudes from the cylinder 1, the first cover plate 121 and the second cover plate 122 can guide part of the airflow. When part of the airflow collides with the first cover plate 121, it flows from the second cover plate 122 and the cylinder 1 towards the bottom, and then flows from the bottom of the crushing plate 23, i.e. between the crushing plate 23 and the cylinder 1, thereby avoiding urea crystallization on the inner wall of the cylinder 1, and at the same time, part of the mixed gas flowing downward due to the action of the urea jet can flow out of the cylinder 1.

[0052] Further, the second cover plate 122 is further provided with a groove 123, which protrudes towards the air outlet end of the cylinder 1.

[0053] The groove 123 is provided with a groove hole, and the groove 123 is provided with a groove fin 124 near the side of the air outlet end of the cylinder 1. The included angle between the groove fin 124 and the groove 123 is 30-40°.

[0054] The number and position of the groove 123 are not limited in the application. The more the number of the groove 123 and the groove hole, the more the gas passing through. In a specific embodiment, as shown in Figure 4 The second cover plate 122 is provided with three grooves 123, which are equally spaced along an arc. The three grooves 123 are each provided with a groove hole, which allows part of the gas to pass through. The groove 123 is provided with a groove fin 124, which can guide the airflow to flow into the cylinder 1 at different angles. Since the groove fin 124 is arranged on the upper side of the groove hole, it can guide part of the airflow to flow from the bottom of the crushing plate 23, thereby avoiding urea crystallization on the inner wall of the cylinder 1. The length of the groove fin 124 is 35-40 mm, and the width is 10-15 mm.

[0055] The specific configuration of the air outlet cover plate 13, the shape, number and position of the air outlet hole 13a are not limited in the application.

[0056] In a specific embodiment, the air outlet cover plate 13 is provided with a plurality of air outlet holes 13a. Any air outlet hole 13a is an oblong hole, and any oblong hole extends in the radial direction.

[0057] In another specific embodiment, the air outlet cover plate 13 is provided with a plurality of air outlet holes 13a. Any air outlet hole 13a is a sector, and a plurality of air outlet holes 13a are spaced along the circumference.Figure 1 As shown, the air outlet cover plate 13 is provided with six air outlet holes 13a, which are distributed equidistantly along the circumference, so that the mixed gas can flow out of the cylindrical urea mixing device more uniformly, and the fan-shaped air outlet holes 13a can also produce a swirling effect on the gas, thereby improving the mixing effect between the urea and the gas.

[0058] Further, the swirling tube 21 is provided with a swirling hole which is a long hole and extends along the axial direction of the swirling tube 21.

[0059] One side of the swirling hole and the outer side of the swirling tube 21 are provided with a swirling vane 211.

[0060] The included angle between the swirling vane 211 and the swirling tube 21 is 30-35°.

[0061] As shown, the swirling hole extends from top to bottom, and the left side of the swirling hole and the outer side of the swirling tube 21 are provided with the swirling vane 211, thereby producing a swirling effect on the gas flow and improving the mixing effect of the gas flow and the urea. At the same time, when the urea nozzle sprays urea, the swirling vane 211 can also break part of the urea sprayed from the outer side of the swirling tube, further improving the effect of urea atomization. Figure 1 The number, position and size of the breaking holes 23a on the breaking plate 23 are not limited, and can be adjusted as needed. In a specific embodiment, the diameter of each breaking hole 23a on the breaking plate 23 is 8-10 mm.

[0062] Further, the spoiler plate 22 includes a first side edge provided with a first extension 221 which is bent towards the direction of the breaking plate 23, and the bending angle of the first extension 221 is 130-150°. When the gas flow enters the cylinder 1 from the air inlet end, part of the gas flow flows towards the direction of the nozzle mounting seat 11. At this time, the first extension 221 can further guide the gas flow, so that part of the gas flow can flow upwards into the space between the swirling tube 21 and the urea mounting seat, and then enter the swirling tube 21.

[0063] Further, the spoiler plate 22 includes a second side edge provided with a first boss 222, and the first cover plate is provided with a first positioning hole 121a for the insertion of the first boss 222.

[0064]

[0065] ​The breaking plate 23 comprises a third side edge, and the third side edge is provided with a second extension 23b which is bent towards the direction of the spoiler 22, and the second extension 23b is welded to the inner wall of the cylinder 1.

[0066] In a specific embodiment, as shown in the figure, the second side edge is provided with two first bosses 222 which are arranged at intervals, and the first cover plate 121 is provided with two first positioning holes 121a, and the first bosses 222 and the first positioning holes 121a are in one-to-one correspondence, and during installation, the first bosses 222 are inserted into the first positioning holes 121a and welded, and then the spoiler 22 and the first cover plate 121 are connected and fixed. Figure 2

[0067] The two third side edges of the breaking plate 23 are provided with the second extensions 23b, and the cylinder 1 is provided with four welding holes, and during installation, the breaking plate 23 is rotated so that the second extensions 23b on the breaking plate 23 cover the welding holes of the cylinder 1, and the cylinder and the second extensions 23b are welded through the welding holes, so that the breaking plate 23 and the cylinder 1 are connected and fixed.

[0068] Further, the first positioning hole 121a is rectangular, with a length of 8-10 mm and a width of 1-2 mm.

[0069] The welding hole is rectangular, with a length of 14-16 mm and a width of 3-5 mm.

[0070] The application is not limited to the installation method of the spoiler 22 and the breaking plate 23. In a specific embodiment, the spoiler 22 is provided with a first mounting hole 22a, and the breaking plate 23 is provided with a second mounting hole 23c, and the edges of the first mounting hole 22a and the second mounting hole 23c are provided with mounting flanges, as shown in the figure. Figure 3 The upper end of the cyclone pipe 21 is inserted into the first mounting hole 22a of the spoiler 22 and welded to the mounting flange of the first mounting hole 22a, and the lower end of the cyclone pipe 21 is inserted into the second mounting hole 23c of the breaking plate 23 and welded to the mounting flange of the second mounting hole 23c, and then the breaking plate 23, the cyclone pipe 21 and the spoiler 22 are connected and fixed and form an integral whole, which is stable in structure and is not easy to move relatively, thereby ensuring the mixing effect of urea and gas and being easy to install.

[0071] ​Further, a temperature sensor 4 is arranged on the side of the cylinder 1, and is used to test the temperature of the cylinder 1. When the temperature sensor 4 detects that the temperature inside the cylinder urea mixing device reaches 200°C or above, the urea nozzle on the urea nozzle mounting seat sprays urea solution.

[0072] Further, a heat shield 3 is sleeved on the cylinder 1, and the end of the heat shield 3 is fixedly connected with the end of the cylinder 1. A heat insulation material is arranged between the heat shield 3 and the cylinder 1.

[0073] The fixed connection of the end of the heat shield 3 with the end of the cylinder 1 can be bolt connection, welding connection, or lap joint, etc. The heat insulation material arranged between the heat shield 3 and the cylinder 1 plays a heat preservation role, avoiding the temperature instability in the mixing assembly 2 to cause the urea solution to be not effectively and fully mixed, and reducing the risk of urea crystallization.

[0074] The material of the heat insulation material is not limited, and in a specific embodiment, the heat insulation material is high-temperature-resistant glass fiber cotton, and the high-temperature-resistant range of the high-temperature-resistant glass fiber cotton is 650-850°C.

[0075] Further, the heat shield 3 comprises:

[0076] A first heat shield 31 in a semicircular shape, and a first connecting portion is arranged on the side of the first heat shield 31 close to the second heat shield 32, and the first connecting portion connects the inner wall of the second heat shield 32.

[0077] A second heat shield 32 in a semicircular shape, which can be sleeved on the cylinder 1 after being combined with the first heat shield 31 into a cylinder, and a second connecting portion is arranged on the side of the second heat shield 32 close to the first heat shield 31 and away from the first connecting portion, and the second connecting portion connects the inner wall of the first heat shield 31.

[0078] In a specific embodiment, as shown in Figure 2 From left to right, the left side of the first heat shield 31 is provided with the first connecting portion, and the right side of the second heat shield 32 is provided with the second connecting portion. When installed, the first connecting portion of the first heat shield 31 is inserted into the inner wall on the left side of the second heat shield 32 and is welded and connected, and the second connecting portion of the second heat shield 32 is inserted into the inner wall on the right side of the first heat shield 31 and is welded and connected. This structure is simple, convenient to install, and easy to implement.

[0079] Finally, it should be noted that the above detailed description is merely illustrative of the technical solutions of the present application and is not limiting, and although the present application has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A cylindrical urea mixing device, characterized by, The application relates to a cylinder type urea mixing device which comprises a cylinder body (1) extending in the axial direction, a nozzle mounting base (11) arranged on the side of the cylinder body (1), an air inlet end and an air outlet end of the cylinder body (1), an air inlet cover plate (12) arranged on the air inlet end, an air inlet arranged on the air inlet cover plate (12), a first cover plate (121) and a second cover plate (122) comprising the air inlet cover plate (12), the first cover plate (121) being semicircular and in a flat plate structure and arranged on one side of the air inlet end close to a spoiler (22), the second cover plate (122) being semicircular and protruding from the cylinder body (1) in a direction away from the cylinder body (1) and arranged on one side of the air inlet end close to a crushing plate (23), a groove (123) arranged on the second cover plate (122) and protruding towards the air outlet end of the cylinder body (1), a groove hole arranged on the groove (123), a groove fin (124) arranged on one side of the groove (123) close to the air outlet end of the cylinder body (1) and one side of the groove (123) close to the air outlet end of the cylinder body (1), an angle between the groove fin (124) and the groove (123) being 30-40 DEG, the air inlet existing between the first cover plate (121) and the second cover plate (122), a height (H) of the air inlet being 20-25 mm, an air outlet cover plate (13) arranged on the air outlet end, an air outlet hole (13a) arranged on the air outlet cover plate (13), a mixing assembly (2) arranged in the cylinder body (1) and fixedly connected with the cylinder body (1), the mixing assembly (2) comprising a cyclone pipe (21) arranged in the radial direction, one end of the cyclone pipe (21) corresponding to the nozzle mounting base (11) and being arranged in a spaced mode with the nozzle mounting base (11), a cyclone hole arranged on the cyclone pipe (21), a spoiler (22) arranged on one end of the cyclone pipe (21) close to the nozzle mounting base (11), a crushing plate (23) arranged on one end of the cyclone pipe (21) away from the nozzle mounting base (11), and a plurality of crushing holes (23a) arranged on the crushing plate (23).

2. The cylinder type urea mixing device according to claim 1, wherein the air outlet cover plate (13) is provided with a plurality of air outlet holes (13a), any air outlet hole (13a) is fan-shaped, and the plurality of air outlet holes (13a) are distributed in a spaced mode along the circumference.

3. The cylinder type urea mixing device according to claim 1, wherein any cyclone hole arranged on the cyclone pipe (21) is a long hole and extends in the axial direction of the cyclone pipe (21), one side of any cyclone hole is provided with a cyclone fin (211), and the angle between any cyclone fin (211) and the tangent of the cyclone pipe (21) is 30-35 DEG.

4. The cylinder type urea mixing device according to claim 1, wherein the diameter of any crushing hole (23a) arranged on the crushing plate (23) is 8-10 mm.

5. The cylinder type urea mixing device according to claim 1, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The spoiler (22) comprises a first side edge provided with a first extension (221) which is bent towards the direction of the crushing plate (23) by an angle of 130-150°.

6. The barrel type urea mixing device according to claim 1, characterized in that, The spoiler (22) comprises a second side edge provided with a first boss (222), and the first cover plate (121) is provided with a first positioning hole (121a) for inserting the first boss (222). The crushing plate (23) comprises a third side edge provided with a second extension (23b) which is bent towards the direction of the spoiler (22) and is welded to the inner wall of the barrel (1).

7. The barrel type urea mixing device according to claim 1, characterized in that, Further comprising a heat insulation cover (3) sleeved on the barrel (1), the end of the heat insulation cover (3) is fixedly connected with the end of the barrel (1), and a heat insulation material is arranged between the heat insulation cover (3) and the barrel (1).

Images