Mixing device for producing urea liquid for vehicles

Abstract

The invention discloses a mixing device for producing urea liquid for vehicles, and relates to the technical field of processing of urea liquid for vehicles. The device comprises a mixing tank, a raw material barrel is fixed to the top of the mixing tank through a support, a liquid input pipe is fixed to the side wall of the raw material barrel, the bottom of the inner wall of the raw material barrel is conical, and two feeding pipes are fixed between the top of the mixing tank and the bottom of the raw material barrel. Through the arrangement of the pretreatment device, a stirring blade rod, a blooming disc, an arc block ring and an abutting rod are matched to drive a conical net barrel to screen urea raw materials, small-particle urea can directly fall into soft water, large-particle urea can be ground and smashed through a grinding roller and grinding teeth of the conical net barrel, and then the urea raw materials are separated from the conical net barrel. The ground and crushed urea falls into the soft water, small-particle urea is directly put into the soft water, large-particle urea is put into the soft water after being ground and crushed, the crushing time can be shortened, and the production efficiency of the whole urea liquid for the vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle urea solution processing, and specifically relates to a mixing device for producing vehicle urea solution. Background Art

[0002] A mixing device for producing vehicle urea solution is a device used to mix high-purity urea and deionized water in a certain proportion. It is widely used in the manufacture of vehicle urea solution used in the SCR (Selective Catalytic Reduction) system, which helps to reduce nitrogen oxides emitted by vehicles and meets environmental protection requirements.

[0003] Chinese Patent with the patent announcement number CN219502524U discloses a vehicle urea mixing production device, belonging to the technical field of vehicle urea processing. Specifically, it is a vehicle urea mixing production device, including a mixing and stirring main body and a motor rotating shaft. Inside the mixing and stirring main body, there is a material transfer box. On the outer side of the motor rotating shaft near the upper end, there is a rolling roller for rolling the materials. At the upper end of the rolling roller, there is a material guiding slope for guiding the materials downward. On one side of the upper end of the mixing and stirring main body, there is a urea feeding port. Through the arrangement of the rolling roller on the outer side of the motor rotating shaft and the material transfer box sleeved on the outside, the urea particles can be guided into the interior of the material transfer box through the guide pipe and crushed and ground by the rolling roller, and then slide downward, so that it can be directly fused with the internal soft water to improve the mixing efficiency. At the same time, part of the water quality can be guided into the interior of the material transfer box through the shunt pipe for flushing to prevent some materials from adhering to the inner wall and being difficult to fall off by themselves.

[0004] However, the current mixing device has the following problems: When the mixing device is working, it will crush and grind the urea raw materials through the rolling roller and then perform the feeding operation. The feeding efficiency of this method is relatively low. For urea with smaller particles, which is already in a form that is relatively easy to dissolve, it can be directly put into soft water for mixing. If the smaller particles of urea are crushed again, the feeding efficiency of the urea raw materials will be greatly reduced, thus reducing the production efficiency of vehicle urea solution. Therefore, we propose a mixing device for producing vehicle urea solution. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a mixing device for producing vehicle urea solution, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A mixing device for the production of vehicle urea solution, including a mixing tank. A raw material barrel is fixed on the top of the mixing tank through a bracket. A liquid input pipe is fixed on the side wall of the raw material barrel. The bottom of the inner wall of the raw material barrel is arranged in a conical shape. Two feed pipes are fixed between the top of the mixing tank and the bottom of the raw material barrel. Due to the conical setting of the bottom of the inner wall of the raw material barrel, it is beneficial for the raw materials in the raw material barrel to be discharged from the feed pipes. A stirring blade rod is rotatably installed in the mixing tank and is driven by a motor. A pretreatment device is arranged above the interior of the mixing tank. The pretreatment device includes a number of elastic telescopic columns evenly fixed around the bottom of the inner wall of the mixing tank, a grinding roller fixed on the outer wall above the stirring blade rod, and a blooming disc fixed on the outer wall above the stirring blade rod. A conical mesh cylinder is fixed between the bottom ends of the telescopic ends of the number of elastic telescopic columns. A circular groove is provided in the middle of the conical mesh cylinder, and grinding teeth are fixed on the inner wall of the circular groove of the conical mesh cylinder. The grinding roller is located inside the circular groove of the conical mesh cylinder. An arc block ring is fixed at the bottom of the blooming disc. Two abutting rods are evenly fixed around the top of the conical mesh cylinder. A number of arc blocks are evenly fixed around the bottom of the arc block ring. The bottom of the abutting rod is located on the movement track of the arc blocks of the arc block ring. The stirring blade rod drives the arc block ring to rotate through the blooming disc. A number of arc blocks of the arc block ring push the abutting rod to drive the conical mesh cylinder to move downward, and the conical mesh cylinder drives the telescopic end of the elastic telescopic column to stretch. When a number of arc blocks of the arc block ring no longer push the abutting rod, under the elastic force of the elastic telescopic column, the telescopic end of the elastic telescopic column drives the conical mesh cylinder to reset and move upward. So on and so forth, thus making the conical mesh cylinder shake up and down, and the conical mesh cylinder screens the urea raw materials falling on it.

[0007] According to the above technical solution, a notch is provided on the outer wall of the blooming disc, and the discharge port of the feed pipe is located on the movement track of the notch of the blooming disc. At the same time, when the blooming disc rotates, when the notch of the blooming disc moves to the position below the feed pipe, the urea raw materials transported by the feed pipe can fall on the conical mesh cylinder at this time. When the notch of the blooming disc is not at the position below the feed pipe, the blooming disc blocks the discharge port of the feed pipe, and the urea raw materials transported by the feed pipe cannot be discharged at this time.

[0008] According to the above technical solution, the pretreatment device further includes three elastic telescopic push rods, three arc rods, and two arc blocking rods. The fixed ends of the three elastic telescopic push rods are evenly fixed around the bottom of the blooming disc. The three arc rods are respectively fixed at the bottom ends of the telescopic ends of the three elastic telescopic push rods. The two arc blocking rods are respectively fixed on both sides of the top of the conical mesh cylinder. During the process that the urea raw materials fall on the grinding roller along the inclined surface of the conical mesh cylinder, the arc blocking rods increase the moving stroke of the urea raw materials on the conical mesh cylinder and increase the contact time between the urea raw materials and the screen of the conical mesh cylinder.

[0009] According to the above technical solution, a dispersion device is provided at the bottom of the conical mesh cylinder. The dispersion device includes a rotating ring and a plurality of U-shaped spreading plates. The rotating ring is rotatably installed on the outer wall of the lower part of the conical mesh cylinder. A plurality of the U-shaped spreading plates are circumferentially and evenly hinged on the outer wall of the stirring blade rod. At both sides of the top of each of the U-shaped spreading plates, chute plates are fixed. A plurality of T-shaped rods are circumferentially and evenly fixed at the bottom of the rotating ring. The bottom of the T-shaped rod is slidably installed between the interiors of two adjacent chute plates. Some of the ground and pulverized urea will fall into the U-shaped spreading plates. When the stirring blade rod rotates, the stirring blade rod drives the U-shaped spreading plates to rotate. The U-shaped spreading plates drive the T-shaped rods to rotate through the chute plates. The T-shaped rods drive the rotating ring to rotate outside the conical mesh cylinder. Every time the conical mesh cylinder moves up and down reciprocally, the conical mesh cylinder pushes the rotating ring to drive the T-shaped rods to move up and down reciprocally. The T-shaped rods slide along the interiors of the chute plates, and the T-shaped rods push the chute plates to drive the U-shaped spreading plates to swing up and down.

[0010] According to the above technical solution, a blanking device is provided at the feed pipe. The blanking device includes a large gear ring and two small gear rings. The large gear ring is fixed on the top of the flowering disc. The two small gear rings are respectively rotatably installed at the bottoms of the two feed pipes. At the inner walls of the two small gear rings, a rotating rod is fixed through a bracket. At the outer wall of the upper part of the rotating rod, a spiral blade is fixed. When the flowering disc rotates, it drives the large gear ring to rotate. The large gear ring drives the small gear rings to rotate. The small gear rings drive the rotating rod to rotate. The rotating rod drives the spiral blade to rotate. The spiral blade drives the raw materials in the raw material barrel to be conveyed into the feed pipe. The spiral blade can continuously push the raw materials during the rotation process.

[0011] According to the above technical solution, the blanking device further includes two L-shaped shells, two oval groove discs, and a plurality of elastic sheets. The two L-shaped shells are respectively fixed on both sides of the raw material barrel. Inside each of the two L-shaped shells, an L-shaped column rod is slidably installed. At the bottom of the horizontal cross-bar of the L-shaped column rod, a sliding column is fixed. The two oval groove discs are respectively fixed on the tops of the two rotating rods, and an oval groove is opened at the top of the oval groove disc. The sliding column of the L-shaped column rod is slidably installed inside the oval groove of the oval groove disc. One ends of the plurality of elastic sheets are respectively fixed at the inner walls of the feed pipes. The other ends of the plurality of elastic sheets penetrate through the inner walls of the feed pipes, and the other ends of the plurality of elastic sheets are fixed at the lower outer walls of the L-shaped column rods. When the rotating rod rotates, the rotating rod drives the oval groove disc to rotate. The oval groove of the oval groove disc pushes the sliding column of the L-shaped column rod to drive the L-shaped column rod to reciprocally move along the inside of the L-shaped shell. When the L-shaped column rod moves away from the raw material barrel, the L-shaped column rod pulls the elastic sheet to move along, and the elastic sheet is straightened, so that the elastic sheet moves dynamically inside the feed pipe.

[0012] The present invention provides a mixing device for producing vehicle urea solution. It has the following beneficial effects: (1) The present invention sets a pretreatment device so that the stirring blade rod, the flower disk, the arc block ring, and the abutment rod cooperate to drive the conical mesh cylinder to screen the urea raw material. The smaller particles of urea will fall directly into the soft water. The grinding teeth of the grinding roller and the conical mesh cylinder will grind and crush the larger particles of urea. The ground and crushed urea will fall into the soft water. By directly putting the smaller particles of urea into the soft water and grinding and crushing the larger particles of urea before putting them into the soft water, the grinding time can be reduced and the overall production efficiency of the automotive urea liquid can be improved. At the same time, the notch of the flower disk can intermittently open and close the outlet of the feed pipe. The material opening is closed, so that the urea raw material will not be continuously and massively accumulated on the conical mesh cylinder, reducing the blockage problem of the conical mesh cylinder caused by the accumulation of raw materials; at the same time, the arc baffle increases the moving stroke of the urea raw material on the conical mesh cylinder, and increases the contact time between the urea raw material and the conical mesh cylinder screen, which means that the urea raw material has more time to pass through the screen during the screening process, thereby improving the screening effect; the blooming disc and the elastic telescopic push rod cooperate to drive the arc rod to push the urea raw material at the arc baffle rod to be dispersed on the conical mesh cylinder screen, thereby further improving the screening effect of the conical mesh cylinder on the urea raw material.

[0013] (2) The present invention provides a dispersion device so that the stirring blade, the U-shaped spreading plate, the chute plate, the T-shaped rod, and the swivel cooperate to drive the U-shaped spreading plate to swing up and down, so that the U-shaped spreading plate dynamically puts the ground urea into the soft water, so that the urea raw material can be evenly dispersed in a shorter time, which helps to ensure that the dissolution and absorption of urea in the soft water are more uniform.

[0014] (3) The present invention sets a feeding device so that the flower disk, the large tooth ring, the small tooth ring, and the rotating rod cooperate to drive the spiral blade to rotate, and the spiral blade drives the raw material in the raw material barrel to be transported into the feed pipe. The spiral blade can continuously push the raw material during the rotation process, instead of relying on the gravity of the urea raw material or external force to directly push the urea raw material to flow. In this way, the urea can be effectively prevented from being blocked or stuck in the feed pipe due to uneven particles. At the same time, the rotating rod, the elliptical groove disk, the L-shaped column rod, and the L-shaped shell cooperate to drive the elastic sheet to move dynamically inside the feed pipe. The dynamic movement of the elastic sheet inside the feed pipe can help break up the accumulation or agglomeration of the raw material. Since the elastic sheet is constantly straightening, it can slightly vibrate or push the urea raw material through its physical action, thereby increasing the fluidity of the urea raw material in the feed pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the present invention as a whole; Figure 2 It is a partial cross-sectional schematic diagram of the present invention; Figure 3 A partial cross-sectional view of the pretreatment device of the present invention Figure 1 ; Figure 4Partial sectional schematic diagram of the pretreatment device of the present invention Figure 2 ; Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the structure at position A; Figure 6 Schematic diagram of the blanking device of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at position B.

[0016] In the figure: 1, mixing tank; 2, raw material barrel; 21, feed pipe; 3, stirring blade rod; 4, pretreatment device; 41, elastic telescopic column; 42, conical mesh cylinder; 43, grinding roller; 44, arc block ring; 45, contact rod; 46, blooming disc; 47, elastic telescopic push rod; 48, arc rod; 49, arc blocking rod; 5, dispersion device; 51, rotating ring; 52, T-shaped rod; 53, chute plate; 54, U-shaped sprinkling plate; 6, blanking device; 61, large gear ring; 62, small gear ring; 63, rotating rod; 64, spiral blade; 65, L-shaped shell; 66, elliptical groove plate; 67, L-shaped column rod; 68, elastic sheet. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0018] Please refer to Figure 1 - Figure 7, an embodiment of the present invention is: a mixing device for producing vehicle urea solution, including a mixing tank 1. A raw material barrel 2 is fixed to the top of the mixing tank 1 through a bracket. A liquid input pipe is fixed to the side wall of the raw material barrel 2. The bottom of the inner wall of the raw material barrel 2 is tapered. Two feed pipes 21 are fixed between the top of the mixing tank 1 and the bottom of the raw material barrel 2. Due to the tapered setting of the bottom of the inner wall of the raw material barrel 2, it is beneficial for the raw materials in the raw material barrel 2 to be discharged from the feed pipes 21. A stirring blade rod 3 is rotatably installed in the mixing tank 1, and the stirring blade rod 3 is driven by a motor. A pretreatment device 4 is arranged above the inside of the mixing tank 1. The pretreatment device 4 includes a plurality of elastic telescopic columns 41 evenly fixed around the bottom of the inner wall of the mixing tank 1 in a circumferential direction, a grinding roller 43 fixed to the outer wall above the stirring blade rod 3, and a blooming disc 46 fixed to the outer wall above the stirring blade rod 3. A tapered mesh cylinder 42 is fixed between the bottom ends of the telescopic ends of the plurality of elastic telescopic columns 41. A circular groove is provided in the middle of the tapered mesh cylinder 42, and grinding teeth are fixed to the inner wall of the circular groove of the tapered mesh cylinder 42. The grinding roller 43 is located inside the circular groove of the tapered mesh cylinder 42. An arc block ring 44 is fixed to the bottom of the blooming disc 46. Two abutting rods 45 are evenly fixed around the top of the tapered mesh cylinder 42 in a circumferential direction. A plurality of arc blocks are evenly fixed around the bottom of the arc block ring 44 in a circumferential direction. The bottom of the abutting rod 45 is located on the movement track of the arc blocks of the arc block ring 44. Through the setting of the above structure, the tapered mesh cylinder 42 shakes up and down, and the tapered mesh cylinder 42 screens the urea raw materials falling on it. The smaller particle urea will directly fall into the soft water, while the larger particle urea falls along the inclined surface of the tapered mesh cylinder 42 to the grinding roller 43. When the stirring blade rod 3 rotates, it will drive the grinding roller 43 to rotate. The grinding roller 43 and the grinding teeth of the tapered mesh cylinder 42 will grind and crush the larger particle urea. The ground and crushed urea will fall into the soft water. By directly putting the smaller particle urea into the soft water and putting the larger particle urea into the soft water after grinding and crushing, the crushing time can be reduced, and the overall production efficiency of the vehicle urea solution can be improved.

[0019] A notch is provided on the outer wall of the blooming disc 46, and the discharge port of the feed pipe 21 is located on the movement track of the notch of the blooming disc 46. Through the setting of the above structure, the blooming disc 46 intermittently opens and closes the discharge port of the feed pipe 21, so that the urea raw materials will not continuously accumulate in large quantities on the tapered mesh cylinder 42, reducing the blockage problem of the tapered mesh cylinder 42 caused by raw material accumulation.

[0020] The pre-treatment device 4 further includes three elastic telescopic push rods 47, three arc-shaped rods 48, and two arc-shaped retaining rods 49. The fixed ends of the three elastic telescopic push rods 47 are evenly fixed on the bottom of the blooming disc 46 in a circumferential manner. The three arc-shaped rods 48 are respectively fixed to the bottom of the telescopic ends of the three elastic telescopic push rods 47. The two arc-shaped retaining rods 49 are respectively fixed to both sides of the top of the conical mesh cylinder 42. Through the above structural arrangement, the arc-shaped retaining rods 49 increase the moving stroke of the urea raw material on the conical mesh cylinder 42 and increase the contact time between the urea raw material and the screen of the conical mesh cylinder 42. This means that the urea raw material has more time to pass through the screen during the screening process, improving the screening effect. When the blooming disc 46 rotates, the blooming disc 46 drives the arc-shaped rod 48 to rotate through the elastic telescopic push rod 47, and the arc-shaped rod 48 pushes the urea raw material at the arc-shaped retaining rod 49 to be dispersed on the screen of the conical mesh cylinder 42, thereby further improving the screening effect of the conical mesh cylinder 42 on the urea raw material.

[0021] A dispersion device 5 is provided at the bottom of the conical mesh cylinder 42. The dispersion device 5 includes a rotating ring 51 and a plurality of U-shaped spreading plates 54. The rotating ring 51 is rotatably installed on the outer wall below the conical mesh cylinder 42. A plurality of U-shaped spreading plates 54 are evenly hinged on the outer wall of the stirring blade rod 3 in a circumferential manner. Both sides of the top of the plurality of U-shaped spreading plates 54 are fixedly provided with chute plates 53. A plurality of T-shaped rods 52 are evenly fixed on the bottom circumference of the rotating ring 51. The bottom of the T-shaped rod 52 is slidably installed between the interiors of two adjacent chute plates 53. Through the above structural arrangement, the U-shaped spreading plates 54 swing up and down, so that the U-shaped spreading plates 54 dynamically put the ground and pulverized urea into the soft water, so that the urea raw material can be evenly dispersed in a relatively short time, which helps to ensure that the dissolution and absorption of urea in the soft water are more uniform.

[0022] During use, soft water is input into the interior of the mixing tank 1 through the liquid input pipe of the raw material tank 2. The urea raw material is placed in the raw material tank 2, and the urea raw material is put into the mixing tank 1 through the feed pipe 21. Then, the stirring blade rod 3 is rotated by a motor, and the stirring blade rod 3 stirs and mixes the liquid inside the mixing tank 1. During the process of putting the urea raw material into the interior of the mixing tank 1, the urea raw material will first fall onto the conical mesh cylinder 42. During the rotation of the stirring blade rod 3, the stirring blade rod 3 drives the arc block ring 44 to rotate through the blooming disc 46. Several arc blocks of the arc block ring 44 push the contact rod 45 to drive the conical mesh cylinder 42 to move downward, and the conical mesh cylinder 42 drives the telescopic end of the elastic telescopic column 41 to stretch. When several arc blocks of the arc block ring 44 no longer push the contact rod 45, under the elastic force of the elastic telescopic column 41, the telescopic end of the elastic telescopic column 41 drives the conical mesh cylinder 42 to reset and move upward. This process repeats, so that the conical mesh cylinder 42 shakes up and down. The conical mesh cylinder 42 screens the urea raw material falling on it. Smaller particle urea will directly fall into the soft water, while larger particle urea falls along the inclined surface of the conical mesh cylinder 42 to the grinding roller 43. When the stirring blade rod 3 rotates, it drives the grinding roller 43 to rotate. The grinding teeth of the grinding roller 43 and the conical mesh cylinder 42 will grind and crush the larger particle urea. The ground and crushed urea will fall into the soft water. By directly putting smaller particle urea into the soft water and putting the larger particle urea into the soft water after grinding and crushing, the crushing time can be reduced, and the production efficiency of the overall vehicle urea solution can be improved. At the same time, when the blooming disc 46 rotates, when the notch of the blooming disc 46 moves to the position below the feed pipe 21, the urea raw material transported by the feed pipe 21 can fall on the conical mesh cylinder 42 at this time. When the notch of the blooming disc 46 is not at the position below the feed pipe 21, the blooming disc 46 blocks the discharge port of the feed pipe 21, and the urea raw material transported by the feed pipe 21 cannot be discharged at this time. This process repeats, so that the blooming disc 46 intermittently opens and closes the discharge port of the feed pipe 21, so that the urea raw material will not continuously accumulate in large quantities on the conical mesh cylinder 42, reducing the blockage problem of the conical mesh cylinder 42 caused by raw material accumulation. During the process of the urea raw material falling along the inclined surface of the conical mesh cylinder 42 to the grinding roller 43, the arc blocking rod 49 increases the moving stroke of the urea raw material on the conical mesh cylinder 42 and increases the contact time between the urea raw material and the screen of the conical mesh cylinder 42. This means that the urea raw material has more time to pass through the screen during the screening process, improving the screening effect. When the blooming disc 46 rotates, the blooming disc 46 drives the arc rod 48 to rotate through the elastic telescopic push rod 47. The arc rod 48 pushes the urea raw material at the arc blocking rod 49 to be dispersed on the screen of the conical mesh cylinder 42, thereby further improving the screening effect of the conical mesh cylinder 42 on the urea raw material. It should be noted that under the elastic force of the elastic telescopic push rod 47, the telescopic end of the elastic telescopic push rod 47 always pushes the arc rod 48 to abut against the top surface of the conical mesh cylinder 42.

[0023] Part of the ground urea will fall into the U-shaped spreading plate 54. When the stirring blade rod 3 rotates, the stirring blade rod 3 drives the U-shaped spreading plate 54 to rotate. The U-shaped spreading plate 54 drives the T-shaped rod 52 to rotate through the chute plate 53. The T-shaped rod 52 drives the rotating ring 51 to rotate outside the conical mesh cylinder 42. Each time the conical mesh cylinder 42 moves up and down reciprocally, the conical mesh cylinder 42 pushes the rotating ring 51 to drive the T-shaped rod 52 to move up and down reciprocally. The T-shaped rod 52 slides inside the chute plate 53, and the T-shaped rod 52 pushes the chute plate 53 to drive the U-shaped spreading plate 54 to swing up and down. Thus, the U-shaped spreading plate 54 dynamically puts the ground urea into the soft water, so that the urea raw material can be evenly dispersed in a relatively short time, which helps to ensure that the dissolution and absorption of urea in the soft water are more uniform. It should be noted that the height of the soft water liquid level inside the mixing tank 1 is lower than that of the dispersing device 5.

[0024] Please refer to Figure 1 - Figure 7 , on the basis of the above embodiments, in another embodiment of the present invention, a blanking device 6 is provided at the feed pipe 21. The blanking device 6 includes a large gear ring 61 and two small gear rings 62. The large gear ring 61 is fixed on the top of the flowering disc 46. The two small gear rings 62 are respectively rotatably installed at the bottoms of the two feed pipes 21. A rotating rod 63 is fixed at the inner wall of the two small gear rings 62 through a bracket. A spiral blade 64 is fixed on the outer wall above the rotating rod 63. Through the above structural arrangement, the spiral blade 64 drives the raw materials in the raw material barrel 2 to be conveyed into the feed pipe 21. The spiral blade 64 can continuously push the raw materials during rotation, rather than relying on the gravity of the urea raw materials or an external force to directly push the urea raw materials to flow. In this way, it can effectively avoid the blockage or jamming phenomenon of urea in the feed pipe 21 due to uneven particle size.

[0025] The blanking device 6 further includes two L-shaped shells 65, two oval groove discs 66, and a plurality of elastic sheets 68. The two L-shaped shells 65 are respectively fixed on both sides of the raw material barrel 2. An L-shaped column rod 67 is slidably installed inside each of the two L-shaped shells 65. A sliding column is fixed at the bottom of the horizontal branch rod of the L-shaped column rod 67. The two oval groove discs 66 are respectively fixed on the tops of the two rotating rods 63, and an oval groove is opened at the top of the oval groove disc 66. The sliding column of the L-shaped column rod 67 is slidably installed inside the oval groove of the oval groove disc 66. One ends of the plurality of elastic sheets 68 are respectively fixed at the inner wall of the feed pipe 21, and the other ends of the plurality of elastic sheets 68 penetrate through the inner wall of the feed pipe 21, and the other ends of the plurality of elastic sheets 68 are fixed at the outer wall below the L-shaped column rod 67. Through the above structural arrangement, the elastic sheets 68 move dynamically inside the feed pipe 21. The dynamic movement of the elastic sheets 68 inside the feed pipe 21 can help to break the accumulation or caking of the raw materials. Since the elastic sheets 68 are constantly straightened, they can slightly vibrate or push the urea raw materials through their physical action, thereby increasing the fluidity of the urea raw materials in the feed pipe 21.

[0026] During use, when the flowering disc 46 rotates, it drives the large gear ring 61 to rotate. The large gear ring 61 drives the small gear ring 62 to rotate, the small gear ring 62 drives the rotating rod 63 to rotate, the rotating rod 63 drives the spiral blade 64 to rotate, and the spiral blade 64 drives the raw materials in the raw material barrel 2 to be conveyed into the feed pipe 21. The spiral blade 64 can continuously push the raw materials during rotation, rather than relying on the gravity of the urea raw materials or an external force to directly push the urea raw materials to flow. This can effectively avoid the phenomenon of blockage or jamming of the urea in the feed pipe 21 due to uneven particles; when the rotating rod 63 rotates, the rotating rod 63 drives the elliptical groove disc 66 to rotate. The elliptical groove of the elliptical groove disc 66 pushes the sliding column of the L-shaped column rod 67 to drive the L-shaped column rod 67 to reciprocate inside the L-shaped shell 65. When the L-shaped column rod 67 moves away from the raw material barrel 2, the L-shaped column rod 67 pulls the elastic sheet 68 to move along with it, and the elastic sheet 68 is straightened, so that the elastic sheet 68 moves dynamically inside the feed pipe 21. The dynamic movement of the elastic sheet 68 inside the feed pipe 21 can help break the accumulation or caking of the raw materials. Since the elastic sheet 68 continuously undergoes a straightening movement, it can slightly vibrate or push the urea raw materials through its physical action, thereby increasing the fluidity of the urea raw materials in the feed pipe 21.

[0027] As described above, it is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A mixing device for producing automotive urea liquid, comprising a mixing tank (1), a raw material barrel (2) being fixed to the top of the mixing tank (1) via a bracket, two feed pipes (21) being fixed between the top of the mixing tank (1) and the bottom of the raw material barrel (2), a stirring blade rod (3) being rotatably mounted on the mixing tank (1), and the stirring blade rod (3) being driven by a motor, characterized in that: A pretreatment device (4) is arranged above the interior of the mixing tank (1), and the pretreatment device (4) comprises a plurality of elastic telescopic columns (41) uniformly fixed on the bottom of the inner wall of the mixing tank (1), a grinding roller (43) fixed on the upper outer wall of the stirring blade rod (3), and a flower plate (46) fixed on the upper outer wall of the stirring blade rod (3). A conical net cylinder (42) is fixed between the bottoms of the telescopic ends of the plurality of elastic telescopic columns (41), a circular groove is provided in the middle of the conical net cylinder (42), and grinding teeth are fixed on the inner wall of the circular groove of the conical net cylinder (42), the grinding roller (43) is located inside the circular groove of the conical net cylinder (42), an arc block ring (44) is fixed at the bottom of the flower plate (46), and two abutment rods (45) are uniformly fixed on the top of the conical net cylinder (42).

2. A mixing device for producing automotive urea liquid according to claim 1, characterized in that: A plurality of arc blocks are evenly fixed on the bottom circumference of the arc block ring (44), and the bottom of the abutment rod (45) is located on the arc block movement trajectory of the arc block ring (44).

3. The mixing device for producing automotive urea liquid according to claim 1, characterized in that: A notch is provided on the outer wall of the flowering disc (46), and the discharge port of the feed pipe (21) is located on the movement track of the notch of the flowering disc (46).

4. The mixing device for producing automotive urea liquid according to claim 1, characterized in that: The bottom of the inner wall of the raw material barrel (2) is arranged in a conical shape.

5. The mixing device for producing vehicle urea liquid according to claim 1, characterized in that: The pretreatment device (4) further comprises three elastic telescopic push rods (47), three arc rods (48), and two arc blocking rods (49); the fixed ends of the three elastic telescopic push rods (47) are evenly fixed at the bottom of the flower disk (46); the three arc rods (48) are respectively fixed at the bottom of the telescopic ends of the three elastic telescopic push rods (47); and the two arc blocking rods (49) are respectively fixed at both sides of the top of the conical net tube (42).

6. The mixing device for producing vehicle urea liquid according to claim 1, characterized in that: A dispersion device (5) is provided at the bottom of the conical net cylinder (42), and the dispersion device (5) comprises a rotating ring (51) and a plurality of U-shaped spreading plates (54). The rotating ring (51) is rotatably mounted on the outer wall below the conical net cylinder (42), and the plurality of U-shaped spreading plates (54) are evenly hinged on the outer wall of the stirring blade rod (3) at a circumference thereof. Both sides of the tops of the plurality of U-shaped spreading plates (54) are fixed with slide plates (53), and the bottom of the rotating ring (51) is evenly fixed with a plurality of T-shaped rods (52), and the bottoms of the T-shaped rods (52) are slidably mounted between the insides of two adjacent slide plates (53).

7. The mixing device for producing vehicle urea liquid according to claim 1, characterized in that: The feed pipe (21) is provided with a feeding device (6), the feeding device (6) comprising a large tooth ring (61) and two small tooth rings (62), the large tooth ring (61) being fixed on the top of the flower disk (46), the two small tooth rings (62) being rotatably mounted on the bottoms of the two feed pipes (21), the inner walls of the two small tooth rings (62) being fixed with a rotating rod (63) via a bracket, and the upper outer wall of the rotating rod (63) being fixed with a spiral blade (64).

8. The mixing device for producing vehicle urea liquid according to claim 7, characterized in that: The unloading device (6) further comprises two L-shaped shells (65), two elliptical groove plates (66), and a plurality of elastic sheets (68). The two L-shaped shells (65) are respectively fixed on both sides of the raw material barrel (2). L-shaped column rods (67) are slidably installed inside the two L-shaped shells (65). A sliding column is fixed at the bottom of the cross support rod of the L-shaped column rod (67). The two elliptical groove plates (66) are respectively fixed on the top of the two rotating rods (63), and an elliptical groove is opened on the top of the elliptical groove plates (66). The sliding column of the L-shaped column rod (67) is slidably installed inside the elliptical groove of the elliptical groove plates (66). One end of the plurality of elastic sheets (68) is respectively fixed on the inner wall of the feeding pipe (21), and the other end of the plurality of elastic sheets (68) passes through the inner wall of the feeding pipe (21), and the other end of the plurality of elastic sheets (68) is fixed on the lower outer wall of the L-shaped column rod (67).

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