Adblue multi-stage stirring tank

Abstract

The utility model provides an adblue multi-stage stirring tank, including first-stage stirring tank, second-stage stirring tank, third-stage stirring tank and bracing frame that connect in proper order from top to bottom, the upper cover plate of first-stage stirring tank is provided with main feed inlet, the bottom plate of first-stage stirring tank is provided with first blanking pipe connected with second-stage stirring tank, the bottom plate of first-stage stirring tank is provided with second blanking pipe connected with third-stage stirring tank, and the bottom plate of second-stage stirring tank is provided with second blanking pipe connected with third-stage stirring tank. A first stirring mechanism and a filter screen are arranged in the first-stage stirring tank, a second stirring mechanism is arranged in the second-stage stirring tank, a third stirring mechanism is arranged in the third-stage stirring tank, and a main discharge port is formed in the third-stage stirring tank. Through the arrangement of the first-stage stirring tank, the second-stage stirring tank and the third-stage stirring tank, graded stirring of adblue is achieved, stirring mechanisms of different grades can conduct stirring of different degrees according to needs, graded stirring and circulating stirring can enable the adblue to be mixed more evenly, and therefore the stirring effect and the product quality are improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of vehicle urea, and in particular to a vehicle urea multi-stage stirring tank. Background Art

[0002] Automotive urea is a liquid used in SCR technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. It is composed of 31.8%-33.3% high-purity urea and the rest of deionized water. The quality of automotive urea solution directly affects the performance of the SCR system. Unqualified urea aqueous solution products will lead to a decrease in the conversion efficiency of the SCR system, and are more prone to blockage, crystallization and coking, which seriously affects the life of the SCR system.

[0003] For example, Chinese patent application number CN201721469228.0 discloses a vehicle urea solution stirring device, including a stirring kettle and a stirrer rotatably arranged inside the stirring kettle; the stirrer is provided with a water suction hole and a drainage hole interconnected with each other, the water suction hole is connected to the lower side of the stirrer, and the drainage hole is connected to the peripheral side of the stirrer.

[0004] The stirring equipment in the above application is not very versatile and has only a first-stage stirring system, which may result in insufficient urea dissolution or slow dissolution, thereby affecting the quality of the produced urea aqueous solution product. Utility Model Content

[0005] 1. Technical problems to be solved by the utility model:

[0006] The utility model provides a multi-stage stirring tank for vehicle urea, which is used to solve the technical problems existing in the above-mentioned background technology.

[0007] 2. Technical solution:

[0008] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: a multi-stage stirring tank for automotive urea, comprising a primary stirring tank, a secondary stirring tank, a tertiary stirring tank and a supporting frame connected in sequence from top to bottom, a main feed port is provided on the upper cover plate of the primary stirring tank, a first discharge pipe connected to the secondary stirring tank is provided on the bottom plate of the primary stirring tank, a first stirring mechanism and a filter screen are provided in the primary stirring tank, a second stirring mechanism is provided in the secondary stirring tank, a third stirring mechanism is provided in the tertiary stirring tank, the first stirring mechanism, the second stirring mechanism and the third stirring mechanism are connected in sequence, the first stirring mechanism is connected to a driving mechanism, a main discharge port is provided on the tertiary stirring tank, the tertiary stirring tank is also connected to a circulation pump, and the circulation pump is connected to the secondary stirring tank through a circulation pipe.

[0009] Preferably, the first stirring mechanism includes a first rotating shaft rotatably installed in the first-stage stirring tank, and a first stirring blade and a second stirring blade are fixedly installed on the first rotating shaft, and the first stirring blade and the second stirring blade are respectively located on the upper and lower sides of the filter screen, the upper end of the first rotating shaft extends out of the upper cover plate and is connected to the driving mechanism, and the lower end extends into the second-stage stirring tank, and the driving mechanism is fixed on the upper cover plate.

[0010] Preferably, the second stirring mechanism comprises a second rotating shaft connected to the first rotating shaft, four first mounting frames are equidistantly arranged on the second rotating shaft, and a third stirring blade, a fourth stirring blade, a fifth stirring blade and a rotating frame are rotatably arranged on the four first mounting frames respectively.

[0011] Preferably, four second mounting frames are equidistantly mounted on the rotating frame, and a sixth stirring blade is rotatably mounted on the second mounting frame.

[0012] Preferably, the third stirring mechanism includes a third rotating shaft rotatably arranged in the three-stage stirring tank, the third rotating shaft is connected to the second rotating shaft, a seventh stirring blade is fixedly mounted on the second rotating shaft, a second discharge pipe and a third discharge pipe are arranged at the lower end of the three-stage stirring tank, the second discharge pipe is connected to the main discharge port, and the third discharge pipe is connected to a circulation pump.

[0013] 3. Beneficial effects:

[0014] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0015] The utility model realizes graded stirring of automotive urea by sequentially connecting a primary stirring tank, a secondary stirring tank and a tertiary stirring tank. The stirring mechanisms at different levels can stir to different degrees as needed. The graded stirring and circulating stirring can make the automotive urea more evenly mixed, reduce the local unevenness, and thus improve the stirring effect and product quality. The utility model has a compact structure and occupies a small area.

[0016] The filter screen arranged in the primary stirring tank of the utility model can filter the materials, remove the impurities and particles therein, and improve the purity of the product.

[0017] The utility model can realize the circulation stirring of vehicle urea between the secondary stirring tank and the tertiary stirring tank by arranging the circulation pump and the circulation pipe, thereby further improving the stirring effect and mixing uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2This is a schematic diagram of the structure of a first-stage stirring tank of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of a two-stage stirring tank of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of a three-stage stirring tank of the utility model.

[0022] Reference numerals:

[0023] 1. First-stage stirring tank; 11. Upper cover plate; 12. Main feed port; 13. Bottom plate; 14. First rotating shaft; 15. First stirring blade; 16. Second stirring blade; 17. Filter screen; 18. First discharge pipe; 2. Second-stage stirring tank; 21. Second rotating shaft; 22. First mounting frame; 23. Third stirring blade; 24. Fourth stirring blade; 25. Fifth stirring blade; 26. Rotating frame; 27. Second mounting frame; 28. Sixth stirring blade; 3. Third-stage stirring tank; 31. Third rotating shaft; 32. Seventh stirring blade; 33. Second discharge pipe; 34. Third discharge pipe; 4. Support frame; 5. Driving mechanism; 6. Circulation pump; 7. Circulation pipe; 8. Main discharge port. DETAILED DESCRIPTION

[0024] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", etc. 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] It should be noted that the structures not introduced in the present invention are not related to the design points and improvement directions of the present invention, and are the same as the prior art or can be implemented by using the prior art, and will not be described in detail here. Example

[0029] Refer to the attached Figures 1 to 4 A multi-stage stirring tank for automotive urea comprises a primary stirring tank 1, a secondary stirring tank 2, a tertiary stirring tank 3 and a support frame 4 which are sequentially connected from top to bottom. A main feed port 12 is provided on an upper cover plate 11 of the primary stirring tank 1. A first discharge pipe 18 connected to the secondary stirring tank 2 is provided on a bottom plate 13 of the primary stirring tank 1. A first stirring mechanism and a filter screen 17 are provided in the primary stirring tank 1. A second stirring mechanism is provided in the secondary stirring tank 2. A third stirring mechanism is provided in the tertiary stirring tank 3. The first stirring mechanism, the second stirring mechanism and the third stirring mechanism are sequentially connected. The first stirring mechanism is connected to a driving mechanism 5. A main discharge port 8 is provided on the tertiary stirring tank 3. The tertiary stirring tank 3 is also connected to a circulation pump 6. The circulation pump 6 is connected to the secondary stirring tank 2 through a circulation pipe 7.

[0030] The first stirring mechanism includes a first rotating shaft 14 rotatably mounted in the primary stirring tank 1, and a first stirring blade 15 and a second stirring blade 16 are fixedly mounted on the first rotating shaft 14. The first stirring blade 15 and the second stirring blade 16 are respectively located on the upper and lower sides of the filter screen 17. The upper end of the first rotating shaft 14 extends out of the upper cover plate 11 and is connected to the driving mechanism 5, and the lower end extends into the secondary stirring tank 2. The driving mechanism 5 is fixed on the upper cover plate 11.

[0031] The second stirring mechanism includes a second rotating shaft 21 connected to the first rotating shaft 14, and four first mounting frames 22 are arranged at equal distances on the second rotating shaft 21, and the third stirring blade 23, the fourth stirring blade 24, the fifth stirring blade 25 and the rotating frame 26 are respectively arranged on the four first mounting frames 22. Four second mounting frames 27 are arranged at equal distances on the rotating frame 26, and the sixth stirring blade 28 is arranged on the second mounting frame 27. The third stirring blade 23 is V-shaped, the fourth stirring blade 24 is a trapezoidal longitudinal section, and is arranged to be tilted downward, and the fifth stirring blade 25 and the sixth stirring blade 28 are rectangular. The third stirring blade 23 is V-shaped, and the V-shaped blade is usually designed to generate a strong vortex flow, which helps to push the material from the center of the container to the edge, thereby accelerating the mixing process. The V-shaped design can increase fluid power and improve stirring efficiency. The fourth stirring blade 24 can ensure that the material can be fully mixed at all levels, thereby improving the uniformity of mixing. Rectangular blades are usually used to provide a smooth flow field to avoid excessive vortices.

[0032] The third stirring mechanism includes a third rotating shaft 31 rotatably arranged in the three-stage stirring tank 3, the third rotating shaft 31 is connected to the second rotating shaft 21, and a seventh stirring blade 32 is fixedly installed on the second rotating shaft 21. A second discharge pipe 33 and a third discharge pipe 34 are arranged at the lower end of the three-stage stirring tank 3, the second discharge pipe 33 is connected to the main discharge port 8, and the third discharge pipe 34 is connected to the circulation pump 6.

[0033] Working process:

[0034] Feeding: Add automotive urea into the primary stirring tank 1 through the main feeding port 12.

[0035] Stirring: Start the driving mechanism 5 to drive the first rotating shaft 14 to rotate, so that the first stirring mechanism starts to work, and the first stirring blade 15 performs initial stirring on the material.

[0036] Filtration: After being filtered through the filter screen 17 , the material enters the lower layer of the filter screen 17 , is stirred again by the second stirring blade 16 , and then enters the secondary stirring tank through the first discharge pipe 18 .

[0037] Secondary stirring: The first rotating shaft 14 drives the second rotating shaft 21 to rotate, and the second stirring mechanism further stirs the material in the secondary stirring tank. By setting a plurality of stirring blades, namely the third stirring blade 23, the fourth stirring blade 24, the fifth stirring blade 25 and the sixth stirring blade 28, the material can be stirred from different directions, thereby improving the uniformity and efficiency of stirring. The setting of the rotating frame 26 and the sixth stirring blade 28 increases the stirring area and reduces the local unevenness, and then enters the tertiary stirring tank.

[0038] Three-stage stirring: the second rotating shaft 21 drives the third rotating shaft 31 to rotate, and the seventh stirring blade 32 of the third stirring mechanism stirs the material again in the three-stage stirring 3. After the stirring is completed, it is tested. If it meets the requirements, the second discharge pipe 33 is opened, and if it does not meet the requirements, the third discharge pipe 34 is opened.

[0039] Circulation stirring: the material enters the circulation pump 6 through the third discharge pipe 34, and the material is pumped back from the tertiary stirring tank 3 to the secondary stirring tank 2, so as to realize circulation stirring, make the material more uniform, and prevent the occurrence of insufficient stirring.

[0040] Discharging: The automotive urea product stirred in step 8 is discharged through the main discharging port.

[0041] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A multi-stage stirring tank for automotive urea, characterized in that: The invention comprises a primary stirring tank (1), a secondary stirring tank (2), a tertiary stirring tank (3) and a support frame (4) which are connected in sequence from top to bottom. The upper cover plate (11) of the primary stirring tank (1) is provided with a main feed port (12). The bottom plate (13) of the primary stirring tank (1) is provided with a first discharge pipe (18) connected to the secondary stirring tank (2). The primary stirring tank (1) is provided with a first stirring mechanism and a filter screen (17). The secondary stirring tank (2) is provided with a second stirring mechanism. The tertiary stirring tank (3) is provided with a third stirring mechanism. The first stirring mechanism, the second stirring mechanism and the third stirring mechanism are connected in sequence. The first stirring mechanism is connected to a driving mechanism (5). The tertiary stirring tank (3) is provided with a main discharge port (8). The tertiary stirring tank (3) is also connected to a circulation pump (6). The circulation pump (6) is connected to the secondary stirring tank (2) via a circulation pipe (7).

2. The multi-stage stirring tank for automotive urea according to claim 1, characterized in that: The first stirring mechanism comprises a first rotating shaft (14) rotatably mounted in the first stirring tank (1), a first stirring blade (15) and a second stirring blade (16) being fixedly mounted on the first rotating shaft (14), the first stirring blade (15) and the second stirring blade (16) being respectively located on upper and lower sides of a filter screen (17), the upper end of the first rotating shaft (14) extending out of an upper cover plate (11) and connected to a driving mechanism (5), and the lower end extending into the second stirring tank (2), the driving mechanism (5) being fixed on the upper cover plate (11).

3. The multi-stage stirring tank for automotive urea according to claim 2, characterized in that: The second stirring mechanism comprises a second rotating shaft (21) connected to the first rotating shaft (14); four first mounting frames (22) are arranged at equal distances on the second rotating shaft (21); and a third stirring blade (23), a fourth stirring blade (24), a fifth stirring blade (25) and a rotating frame (26) are rotatably arranged on the four first mounting frames (22).

4. The multi-stage stirring tank for automotive urea according to claim 3, characterized in that: Four second mounting frames (27) are mounted at equal distances on the rotating frame (26), and a sixth stirring blade (28) is rotatably mounted on the second mounting frame (27).

5. The multi-stage stirring tank for automotive urea according to claim 3, characterized in that: The third stirring mechanism comprises a third rotating shaft (31) rotatably arranged in the three-stage stirring tank (3), the third rotating shaft (31) being connected to the second rotating shaft (21), a seventh stirring blade (32) being fixedly mounted on the second rotating shaft (21), a second discharge pipe (33) and a third discharge pipe (34) being arranged at the lower end of the three-stage stirring tank (3), the second discharge pipe (33) being connected to the main discharge port (8), and the third discharge pipe (34) being connected to the circulation pump (6).

Images