A feeding device for producing vehicle urea

Abstract

This utility model relates to a feeding device for automotive urea production, aiming to solve the technical problem that urea granules are prone to continuous temperature rise during the spiral conveying process due to friction between the blades and the granules, and between the granules and the pipe wall. When the temperature exceeds 30°C, the urea granules are prone to local softening and clumping, which not only affects the smoothness of the conveying process, but also leads to incomplete dissolution and increased impurities in the subsequent dissolution process. The device includes: a base; a feeding mechanism, which is inclinedly set on one side of the top of the base. The feeding mechanism includes: a feeding pipe with a spiral feeding component for conveying urea raw materials in its inner cavity. This utility model can wrap the entire conveying path through the interlayer of the feeding pipe wall. The cooling medium (such as cooling water) enters the interlayer along the inlet pipe under the drive of the circulating pump, absorbs the heat of the feeding pipe wall, and returns to the cooling box through the return pipe, forming a closed-loop heat dissipation. This prevents the urea granules in the inner cavity of the feeding pipe from clumping due to friction and ensures that the urea granules are kept below 30°C throughout the process.

Description

Technical Field

[0001] This utility model relates to the field of automotive urea production technology, specifically to a feeding device for automotive urea production. Background Technology

[0002] Automotive urea is mainly used in diesel engines. When it reacts with nitrogen oxides in diesel exhaust, it can effectively reduce the content of nitrogen oxides, thereby achieving the purpose of purifying the exhaust.

[0003] In the feeding stage of automotive urea production, screw conveyors are commonly used to achieve continuous conveying of urea granules. However, existing screw conveyors are prone to continuous temperature rise during the conveying process due to friction between the blades and the granules, and between the granules and the pipe wall. When the temperature exceeds 30°C, the urea granules are prone to local softening and clumping, which not only affects the smoothness of the conveying process but also leads to incomplete dissolution and increased impurities in the subsequent dissolution process. Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a feeding device for automotive urea production. This device solves the problem that urea granules are prone to continuous temperature rise during the spiral conveying process due to friction between the blades and the granules, and between the granules and the pipe wall. When the temperature exceeds 30°C, the urea granules are prone to local softening and clumping, which not only affects the smoothness of the conveying process, but also leads to incomplete dissolution and increased impurities in the subsequent dissolution process.

[0005] To achieve the objective of this utility model, the technical solution adopted is as follows: A feeding device for automotive urea production is designed, comprising:

[0006] Base;

[0007] The feeding mechanism is inclinedly disposed on one side of the top of the base, and the feeding mechanism includes:

[0008] The feeding pipe has a spiral feeding assembly for conveying urea raw materials in its inner cavity;

[0009] A cooling mechanism, located outside the feeding mechanism, is used to cool the conveyed urea raw material. The cooling mechanism includes:

[0010] The interlayer is formed inside the wall of the feed pipe;

[0011] The cooling box is fixed to the base below the feeding pipe. A return water pipe is connected between the top of the cooling box and the bottom of the feeding pipe. The two ends of the return water pipe are connected to the cooling box and the interlayer, respectively.

[0012] The water inlet pipe connects the cooling box and the bottom of the feeding pipe, with its two ends connected to the cooling box and the interlayer, respectively.

[0013] The circulating pump is fixed inside the cooling tank, and its outlet is connected to the inlet pipe.

[0014] Preferably, the feeding mechanism further includes a drive motor, which is fixedly connected to the surface of the base. The drive end of the drive motor is connected to a drive shaft via a coupling, and the drive shaft is connected to the screw feeding assembly via a transmission component.

[0015] Preferably, the spiral feeding assembly includes:

[0016] A rotating shaft is rotatably connected to the center of the inner cavity of the feeding tube via a sealed bearing. One end of the rotating shaft rotatably passes through and is positioned on the lower side of the feeding tube. The drive shaft is connected to the rotating shaft via a drive assembly.

[0017] The spiral blade is fixedly connected to the outside of the rotating shaft inside the feed tube, and the outside of the spiral blade moves against the inner wall of the feed tube.

[0018] Preferably, a support frame is fixedly connected to the side of the base away from the feeding pipe, a storage box is fixedly connected to the top of the support frame, a feeding pipe is fixedly connected to the bottom of the storage box, and the feeding pipe passes through the feeding pipe and the interlayer and communicates with the inner cavity of the feeding pipe. A discharge pipe is provided on one side of the bottom of the feeding pipe, the discharge pipe passes through the feeding pipe and the interlayer and communicates with the inner cavity of the feeding pipe, and a support rod is fixedly connected between the feeding pipe and the base.

[0019] Preferably, the feed tube is rectangular, and a connecting shaft is rotatably connected between the two ends of the inner cavity of the feed tube through a sealed bearing. Multiple actuating plates are equidistantly connected to the outer periphery of the connecting shaft. One end of the connecting shaft extends through the feed tube to the outside. A first sprocket is fixedly connected to the connecting shaft on the outside of the feed tube, and a second sprocket is fixedly connected to the outside of the drive shaft. A chain is provided between the first sprocket and the second sprocket.

[0020] Preferably, the transmission assembly includes a first arc-shaped frame, a second arc-shaped frame, and a cross, wherein the first arc-shaped frame is fixedly connected to a transmission shaft, the second arc-shaped frame is fixedly connected to a rotating shaft, and the cross is rotatably connected between the first arc-shaped frame and the second arc-shaped frame through a sealed bearing.

[0021] Preferably, a water injection hole is provided on one side of the top of the cooling box, and a sealing plug is screwed into the water injection hole.

[0022] Preferably, omnidirectional wheels are installed at the four corners of the bottom of the base, and the omnidirectional wheels have a self-locking function.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1. Uniform cooling: The entire conveying path is wrapped by the interlayer of the feeding pipe wall. The cooling medium (such as cooling water) enters the interlayer along the water inlet pipe under the drive of the circulating pump. After absorbing the heat of the feeding pipe wall, it returns to the cooling box through the return water pipe, forming a closed-loop heat dissipation. This prevents the urea particles in the inner cavity of the feeding pipe from agglomerating due to friction and ensures that the urea particles are kept below 30°C throughout the process.

[0025] 2. Low temperature maintenance: The circulating pump provides stable power, which keeps the cooling medium flowing continuously. It can remove the heat generated by the friction between the spiral blades and particles, and between the particles and the pipe wall in real time. Compared with static cooling, which is prone to cooling failure due to heat exchange saturation, it prevents the urea particles from softening and sticking together locally.

[0026] 3. Smooth conveying: In low-temperature environments, it prevents urea granules from softening and clumping. Combined with the pushing of the spiral blades, it can prevent clumping and blockage of the feeding pipe, ensuring continuous and uninterrupted conveying. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a cross-sectional view of the feeding mechanism of this utility model;

[0029] Figure 3 This is a sectional front view of the connection between the feed tube, the connecting shaft, and the actuating plate of this utility model;

[0030] Figure 4 This is a schematic diagram of the transmission component structure of this utility model;

[0031] Figure 5 This is a sectional front view of the cooling box of this utility model.

[0032] In the diagram: 1. Base; 11. Casters; 12. Support frame; 2. Storage box; 21. Feed pipe; 22. Loading pipe; 23. Discharge pipe; 24. Rotating shaft; 25. Drive motor; 26. Transmission shaft; 27. Support rod; 28. Spiral blade; 3. Transmission assembly; 31. Cross; 32. First arc frame; 33. Second arc frame; 4. Second sprocket; 41. Chain; 42. First sprocket; 5. Connecting shaft; 51. Actuating plate; 6. Cooling box; 61. Return water pipe; 62. Interlayer; 63. Water inlet pipe; 64. Circulation pump; 65. Water injection hole; 66. Sealing plug. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0034] Example 1: A feeding device for automotive urea production, see [link / reference] Figures 1 to 5 ,include:

[0035] Base 1;

[0036] The feeding mechanism is inclinedly disposed on one side of the top of the base 1, and the feeding mechanism includes:

[0037] Feed pipe 22, the inner cavity of which is equipped with a spiral feeding assembly for conveying urea raw materials;

[0038] A cooling mechanism, located outside the feeding mechanism, is used to cool the conveyed urea raw material. The cooling mechanism includes:

[0039] The interlayer 62 is formed inside the wall of the feed pipe 22;

[0040] Cooling box 6, base 1 fixed below feeding pipe 22, with a return water pipe 61 connected between its top and the bottom of feeding pipe 22, the two ends of the return water pipe 61 being connected to cooling box 6 and interlayer 62 respectively.

[0041] The water inlet pipe 63 is connected between the cooling box 6 and the bottom end of the feeding pipe 22, and its two ends are respectively connected to the cooling box 6 and the interlayer 62.

[0042] The circulating pump 64 is fixedly connected inside the cooling tank 6, and its outlet end is connected to the inlet pipe 63.

[0043] This device, through its feeding and cooling mechanisms, achieves the following during use:

[0044] Uniform cooling: The jacket 62 of the feed pipe 22 can cover the entire conveying path. The cooling medium (such as cooling water) enters the jacket 62 along the inlet pipe 63 under the drive of the circulating pump 64. After absorbing the heat of the feed pipe 22 wall, it returns to the cooling box 6 through the return pipe 61, forming a closed-loop heat dissipation. This prevents the urea particles in the inner cavity of the feed pipe 22 from agglomerating due to friction and ensures that the urea particles are kept below 30°C throughout the process.

[0045] Low temperature maintenance: The circulating pump 64 provides stable power to keep the cooling medium flowing continuously, which can remove the heat generated by the friction between the spiral blades 28 and the particles, and between the particles and the pipe wall in real time. Compared with static cooling, which is prone to cooling failure due to heat exchange saturation, this prevents the urea particles from softening and sticking together locally.

[0046] Smooth conveying: In low-temperature environments, urea granules are prevented from softening and clumping. With the push of the spiral blades 28, clumping and blockage of the feed pipe 22 can be avoided, ensuring continuous and uninterrupted conveying.

[0047] For details, see Figure 1The feeding mechanism further includes a drive motor 25, which is fixedly connected to the surface of the base 1. The drive end of the drive motor 25 is connected to a transmission shaft 26 via a coupling. The transmission shaft 26 is connected to the screw feeding assembly via a transmission component 3. The drive motor 25 drives the screw feeding assembly to rotate at a uniform speed via the transmission shaft 26 and the transmission component 3, thereby avoiding severe friction between particles and the pipe wall and blades caused by non-uniform speed conveying, reducing heat generation from the source, and making it easier to maintain a low temperature with the help of the cooling mechanism.

[0048] Further, see Figure 2 The spiral feeding assembly includes:

[0049] The rotating shaft 24 is rotatably connected to the center of the inner cavity of the feeding tube 22 via a sealed bearing. One end of the rotating shaft 24 is rotatably inserted through the lower end of the feeding tube 22. The transmission shaft 26 is connected to the rotating shaft 24 via the transmission assembly 3.

[0050] The spiral blade 28 is fixedly connected to the outside of the rotating shaft 24 inside the feed pipe 22, and the outside of the spiral blade 28 moves against the inner wall of the feed pipe 22. By tightly fitting the outside of the spiral blade 28 against the inner wall of the feed pipe 22, the particles are prevented from being stuck due to excessive gap between the spiral blade 28 and the pipe wall, and the urea particles can be completely pushed.

[0051] It is worth noting that, see Figure 1 and Figure 2 A support frame 12 is fixedly connected to the side of the base 1 away from the feeding pipe 22. A storage box 2 is fixedly connected to the top of the support frame 12. A feeding pipe 21 is fixedly connected to the bottom of the storage box 2. The feeding pipe 21 passes through the feeding pipe 22 and the interlayer 62 and communicates with the inner cavity of the feeding pipe 22. A discharge pipe 23 is provided on one side of the bottom of the feeding pipe 22. The discharge pipe 23 passes through the feeding pipe 22 and the interlayer 62 and communicates with the inner cavity of the feeding pipe 22. The feeding pipe 22 is fixedly connected to the base 1. The device is connected to a support rod 27, which can store a certain amount of urea granules through the storage box 2. The urea granules are continuously fed to the inclined feeding pipe 22 through the feed pipe 21. The support rod 27, the base 1 and the feeding pipe 22 form a triangular stable structure, which improves the stability of the feeding pipe 22 during use. Moreover, the feed pipe 21 and the discharge pipe 23 are sealed when they pass through the interlayer 62 to ensure that there is no leakage of cooling medium. This ensures that the circulation efficiency of the cooling medium in the interlayer 62 is not affected, and at the same time, it prevents the granules from leaking out from the penetration point, maintaining a closed environment inside the feeding pipe 22.

[0052] It is worth noting that, see Figure 1 and Figure 3The feed pipe 21 is rectangular. A connecting shaft 5 is rotatably connected between the two ends of the inner cavity of the feed pipe 21 via a sealed bearing. Multiple actuating plates 51 are equidistantly connected to the outer circumference of the connecting shaft 5. One end of the connecting shaft 5 extends through the feed pipe 21 to the outside. A first sprocket 42 is fixedly connected to the connecting shaft 5 on the outside of the feed pipe 21. A second sprocket 4 is fixedly connected to the outside of the drive shaft 26. A chain 41 is provided between the first sprocket 42 and the second sprocket 4. The drive shaft 26 is connected to the first sprocket 42 and the second sprocket 4 by the chain 41, the first sprocket 42, and the second sprocket 4. The configuration allows the drive motor 25 to rotate the spiral blades 28 to feed urea granules. The connecting shaft 5 drives the agitator 51 to rotate synchronously with the transmission shaft 26, which can evenly push the granules in the storage box 2 into the feeding pipe 22, thereby avoiding the blockage of the feed inlet caused by the free fall of urea granules. This ensures that the granules are immediately pushed by the spiral blades 28 after entering the pipe, and the agitation speed is synchronized with the spiral conveying speed. The relative speed difference between the granules and the spiral blades 28 when they enter the pipe is reduced, avoiding the generation of additional heat due to violent collisions caused by speed mismatch.

[0053] It is worth mentioning that, see Figure 1 and Figure 4 The transmission assembly 3 includes a first arc frame 32, a second arc frame 33, and a cross 31. The first arc frame 32 is fixedly connected to the transmission shaft 26, and the second arc frame 33 is fixedly connected to the rotating shaft 24. The cross 31 is rotatably connected between the first arc frame 32 and the second arc frame 33 through a sealed bearing. The arrangement of the first arc frame 32, the second arc frame 33, and the cross 31 can accommodate the angular deviation between the transmission shaft 26 and the rotating shaft 24, ensuring smooth power transmission and reducing the sudden increase or decrease of blade speed due to poor transmission. Furthermore, the contact between the arc frame and the cross 31 is a rolling friction, which reduces the wear of transmission components and avoids unstable power transmission due to component wear, ensuring long-term stable operation of the equipment.

[0054] It is worth mentioning that, see Figure 5 The cooling tank 6 has a water injection hole 65 on one side of its top, and a sealing plug 66 is screwed into the water injection hole 65. The cooling medium can be quickly replenished through the water injection hole 65 to ensure that the circulation system always maintains a sufficient amount of medium. After the sealing plug 66 is tightened, it can prevent external dust and impurities from entering the cooling tank 6, avoid impurities from clogging the circulation pump 64 or the jacket 62 pipe, ensure the long-term efficient operation of the cooling system, and reduce local temperature rise caused by blockage.

[0055] It is worth mentioning that, see Figure 1The base 1 is equipped with casters 11 at the four corners of its bottom. The casters 11 have a self-locking function. The device can be flexibly moved to different production line stations and docked with the dissolving tank through the casters 11. There is no need to increase the conveying distance due to the fixed position. The casters 11 with the self-locking function can lock the casters 11 after the device is in place, so as to avoid the slight movement of the equipment during production.

[0056] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0057] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A feeding device for automotive urea production, characterized in that, include: Base (1); The feeding mechanism is inclinedly disposed on one side of the top of the base (1), and the feeding mechanism includes: The feed pipe (22) has a spiral feed assembly for conveying urea raw materials in its inner cavity; A cooling mechanism, located outside the feeding mechanism, is used to cool the conveyed urea raw material. The cooling mechanism includes: The interlayer (62) is formed inside the wall of the feed pipe (22); Cooling box (6) is fixed to base (1) below feed pipe (22). A return water pipe (61) is connected between its top and the bottom of feed pipe (22). The two ends of the return water pipe (61) are connected to cooling box (6) and interlayer (62) respectively. The water inlet pipe (63) is connected between the bottom end of the cooling box (6) and the feeding pipe (22), and its two ends are respectively connected to the cooling box (6) and the interlayer (62). The circulating pump (64) is fixed inside the cooling tank (6), and its outlet end is connected to the inlet pipe (63).

2. The feeding device for automotive urea production as described in claim 1, characterized in that, The feeding mechanism further includes a drive motor (25), which is fixedly connected to the surface of the base (1). The drive end of the drive motor (25) is connected to a transmission shaft (26) via a coupling. The transmission shaft (26) is connected to the spiral feeding assembly via a transmission component (3).

3. The feeding device for automotive urea production as described in claim 2, characterized in that, The spiral feeding assembly includes: A rotating shaft (24) is rotatably connected to the center of the inner cavity of the feeding tube (22) through a sealed bearing. One end of the rotating shaft (24) is rotatably inserted through the lower end of the feeding tube (22). The transmission shaft (26) is connected to the rotating shaft (24) through a transmission assembly (3). The spiral blade (28) is fixedly connected to the outside of the rotating shaft (24) inside the feed tube (22), and the outside of the spiral blade (28) moves against the inner wall of the feed tube (22).

4. The feeding device for automotive urea production as described in claim 3, characterized in that, A support frame (12) is fixedly connected to the side of the base (1) away from the feeding pipe (22). A storage box (2) is fixedly connected to the top of the support frame (12). A feeding pipe (21) is fixedly connected to the bottom of the storage box (2). The feeding pipe (21) passes through the feeding pipe (22) and the interlayer (62) and communicates with the inner cavity of the feeding pipe (22). A discharge pipe (23) is provided on one side of the bottom of the feeding pipe (22). The discharge pipe (23) passes through the feeding pipe (22) and the interlayer (62) and communicates with the inner cavity of the feeding pipe (22). A support rod (27) is fixedly connected between the feeding pipe (22) and the base (1).

5. The feeding device for automotive urea production as described in claim 4, characterized in that, The feed tube (21) is rectangular. A connecting shaft (5) is rotatably connected between the two ends of the inner cavity of the feed tube (21) through a sealed bearing. Multiple actuating plates (51) are equidistantly connected to the outer periphery of the connecting shaft (5). One end of the connecting shaft (5) extends through the feed tube (21) to the outside. A first sprocket (42) is fixedly connected to the connecting shaft (5) on the outside of the feed tube (21). A second sprocket (4) is fixedly connected to the outside of the transmission shaft (26). A chain (41) is provided between the first sprocket (42) and the second sprocket (4).

6. A feeding device for automotive urea production as described in claim 2 or 3, characterized in that, The transmission assembly (3) includes a first arc frame (32), a second arc frame (33) and a cross (31). The first arc frame (32) is fixedly connected to the transmission shaft (26), the second arc frame (33) is fixedly connected to the rotating shaft (24), and the cross (31) is rotatably connected between the first arc frame (32) and the second arc frame (33) through a sealed bearing.

7. The feeding device for automotive urea production as described in claim 1, characterized in that, A water injection hole (65) is provided on one side of the top of the cooling box (6), and a sealing plug (66) is screwed into the water injection hole (65).

8. The feeding device for automotive urea production as described in claim 1, characterized in that, The base (1) is equipped with casters (11) at the four corners of its bottom, and the casters (11) have a self-locking function.

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