Anti-crystallization floating mechanism for urea tank liquid level sensor

Abstract

The utility model discloses a kind of urea tank liquid level sensor anti-crystallization floating mechanism, specifically related to anti-crystallization floating technical field, including guide rod, the outer wall of guide rod is equipped with floating cleaning assembly, floating cleaning assembly includes: floating ring, slidingly connected on the outer wall of guide rod, the upper surface and lower surface of floating ring are fixed with scraper ring, scraper ring is used to scrape crystalline along the outer wall of guide rod;Multiple buoyancy blocks, are fixed on the outer wall of floating ring, the upper surface of each buoyancy block is fixed with positioning rod.The utility model is through floating cleaning assembly, two counterweight strips and two counterweight sleeve blocks can provide vertical counterweight force to two buoyancy blocks, buoyancy block and floating ring are synchronous and move up, when urea liquid level reduces, counterweight strip counterweights counterweight sleeve block, can utilize large-area floating counterweight force to realize cleaning crystalline site, and anti-crystallization effect is more excellent.

Description

Technical Field

[0001] This utility model relates to the field of anti-crystallization floating technology, and more specifically, to an anti-crystallization floating mechanism for a urea tank level sensor. Background Technology

[0002] In the urea nozzle device of the SCR system, the core function of the anti-crystallization floating mechanism of the urea tank level sensor is that the anti-crystallization floating mechanism adopts a sealed structure or special coating. The float is usually made of corrosion-resistant and anti-crystallization plastic or metal material, and the surface is covered with an anti-stick coating to reduce the adhesion of urea crystals.

[0003] Among the existing published documents, patent publication number CN217042082U discloses an SCR mixing device for preventing urea crystallization. This technology works by expelling the floating crystal particles through vehicle exhaust emissions, thus facilitating the removal of initially formed small urea particles from the vehicle. The auxiliary rotation of the steel balls makes the rotation of the rotating ring smoother. The vehicle exhaust emissions impact the wind deflector, which in turn drives the rotating column to rotate, preventing urea crystal particles from floating into the vehicle's interior. However, this patent has the following drawbacks.

[0004] During the anti-crystallization floating process of the urea tank level sensor, crystals easily adhere to the float, and it is difficult to use the large-area floating counterweight force to clean the crystallized parts on the outer wall of the float. This can easily cause the floating part of the urea tank level sensor to get stuck when the amount of crystals is large. Therefore, an anti-crystallization floating mechanism for the urea tank level sensor is needed. Utility Model Content

[0005] To overcome the aforementioned deficiencies of the prior art, this utility model provides the following technical solution: a urea tank level sensor anti-crystallization floating mechanism, comprising a guide rod, the outer wall of which is provided with a floating cleaning assembly, the floating cleaning assembly comprising: A floating ring is slidably connected to the outer wall of the guide rod. Scraper rings are fixed on both the upper and lower surfaces of the floating ring. The scraper rings are used to scrape the crystals along the outer wall of the guide rod. Multiple buoyancy blocks are fixed to the outer wall of the floating ring, and a positioning rod is fixed to the upper surface of each buoyancy block; The counterweight sleeve is slidably inserted into the outer wall of the positioning rod, and multiple counterweight strips are fixed between the two counterweight sleeves.

[0006] In a preferred embodiment, the two scraper rings are symmetrically arranged about the floating ring, and the outer wall of the scraper ring is a smooth surface.

[0007] In a preferred embodiment, the two buoyancy blocks are symmetrically arranged about the guide rod, and both the buoyancy blocks and the floating ring are made of foam resin.

[0008] In a preferred embodiment, each of the buoyancy blocks has a mounting block fixed to one side, the mounting block being used to mount a liquid level sensor.

[0009] In a preferred embodiment, a fixing block is fixed to the bottom end of the guide rod, and the fixing block has multiple mounting holes inside; Each of the mounting holes has a circular cross-sectional shape.

[0010] In a preferred embodiment, a linkage rod is fixed on the upper surface of the floating ring and at a position on one side of the counterweight bar, and a limit sleeve is fixed at the top end of the guide rod. The linkage rod is used to pass through the limit sleeve and move. A guide ring is fixed on the upper surface of the limiting sleeve. The guide ring is slidably connected to the linkage rod. A grip block is installed at the top of the linkage rod. A handle is connected to the outer wall of the grip block. Both the handle and the linkage rod are fixedly connected to the grip block.

[0011] In a preferred embodiment, the grip block is perpendicularly disposed between the grip and the handle, and the cross-sectional area of ​​the grip block is larger than the cross-sectional area of ​​the linkage rod.

[0012] The technical effects and advantages of this utility model are as follows: 1. This utility model uses a floating cleaning component to insert the liquid level sensor into the mounting block to complete the installation operation. Two counterweight bars and two counterweight sleeves can provide vertical counterweight force to two buoyancy blocks. The counterweight force on the two buoyancy blocks is provided to the floating ring. The buoyancy blocks and the floating ring move upward synchronously. After the floating ring receives buoyancy, it drives the two scraper rings to move upward synchronously. When the urea liquid level drops, the counterweight bars counterweight the counterweight sleeves, and the counterweight sleeves counterweight the buoyancy blocks. It can use the large-area floating counterweight force to clean the crystallization part, and the anti-crystallization effect is more excellent.

[0013] 2. This utility model guides the linkage rod to move upward along the inner wall of the limiting sleeve, and at the same time, the linkage rod moves upward along the inner wall of the guide ring. The grip block causes the handle to move upward. When personnel need to perform maintenance, the linkage rod drives the floating ring to make the two scraper rings move up and down back and forth. Maintenance is performed to check whether the scraper rings can perform scraping work along the outer wall of the guide rod, which facilitates later maintenance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the anti-crystallization floating mechanism of the urea tank level sensor of this utility model.

[0015] Figure 2 This is a schematic diagram of a partial structure of the guide rod cutoff of this utility model.

[0016] Figure 3 This is a partial structural diagram of the connection between the floating ring and the scraping ring of this utility model.

[0017] Figure 4 This is a partial structural diagram of the connection between the positioning rod and the counterweight block of this utility model.

[0018] Figure 5 This is a partial structural diagram of the connection between the linkage rod and the gripping block of this utility model.

[0019] The attached diagram is labeled as follows: 1. Guide rod; 2. Floating ring; 3. Scraper ring; 4. Buoyancy block; 5. Positioning rod; 6. Counterweight sleeve block; 7. Counterweight bar; 8. Mounting block; 9. Fixing block; 10. Mounting hole; 11. Linkage rod; 12. Limiting sleeve; 13. Guide ring; 14. Grip block; 15. Handle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1 - Figure 5 The diagram shows a floating anti-crystallization mechanism for a urea tank level sensor. This floating mechanism includes a floating cleaning component. When the urea level decreases, the counterweight bar 7 counterweights the counterweight sleeve 6, and the counterweight sleeve 6 counterweights the buoyancy block 4. This allows for the cleaning of the crystallized areas using a large-area floating counterweight force, resulting in a superior anti-crystallization effect. The specific structure of the floating cleaning component is as follows.

[0022] In this embodiment, as Figure 1 - Figure 4 As shown, the outer wall of the guide rod 1 is equipped with a floating cleaning assembly, which includes: a floating ring 2, slidably connected to the outer wall of the guide rod 1, with scraper rings 3 fixed to both the upper and lower surfaces of the floating ring 2, the scraper rings 3 being used to scrape the crystals along the outer wall of the guide rod 1; multiple buoyancy blocks 4, all fixed to the outer wall of the floating ring 2, with a positioning rod 5 fixed to the upper surface of each buoyancy block 4; and counterweight sleeves 6, slidably inserted into the outer wall of the positioning rods 5, with multiple counterweight strips 7 fixed between two counterweight sleeves 6. The two scraper rings 3 are symmetrically arranged about the floating ring 2, and the outer wall of the scraper ring 3 is a smooth surface. The two buoyancy blocks 4 are symmetrically arranged about the guide rod 1, and both the buoyancy blocks 4 and the floating ring 2 are made of foam resin.

[0023] In this embodiment, as Figure 2 As shown, each buoyancy block 4 has a mounting block 8 fixed to one side, and the mounting block 8 is used to install the liquid level sensor. The installation operation is completed by inserting the liquid level sensor into the mounting block 8, which facilitates the positioning and installation of the liquid level sensor.

[0024] In this embodiment, as Figure 2 As shown, a fixing block 9 is fixed to the bottom end of the guide rod 1, and multiple mounting holes 10 are opened inside the fixing block 9; the cross-sectional shape of each mounting hole 10 is circular. By inserting bolts into the mounting holes 10, the fixing block 9 is fixed to the bottom position of the inner wall of the urea tank. The fixing block 9 supports the guide rod 1 and increases the stability of the guide rod 1.

[0025] In this technology, the anti-crystallization floating mechanism for the urea tank level sensor is installed by inserting bolts into the mounting holes 10 to fix the fixing block 9 to the bottom of the inner wall of the urea tank. Simultaneously, the level sensor is inserted into the mounting block 8 to complete the installation. The positioning rod 5 positions and supports the counterweight sleeve 6. The two counterweight bars 7 and the two counterweight sleeves 6 provide vertical counterweight force to the two buoyancy blocks 4. This counterweight force on the two buoyancy blocks 4 is also provided to the floating ring 2. When the urea buoyancy contacts the two buoyancy blocks 4 and the floating ring 2, the buoyancy blocks 4 and the floating ring 2 move in tandem. As the urea liquid level decreases, the counterweight 7 weighs the counterweight sleeve 6, which in turn weighs the buoyancy block 4. The buoyancy block 4 causes the floating ring 2 to move downwards, and the floating ring 2 causes the lower scraper ring 3 to scrape the crystals on the outer wall of the guide rod 1. The buoyancy is always greater than the gravity, so when the scraper ring 3 moves downwards, it has enough gravity to remove the crystals from the outer wall of the guide rod 1, thus preventing larger crystals from adhering to the outer wall of the guide rod 1.

[0026] In this embodiment, as Figure 5 As shown, a linkage rod 11 is fixed to the upper surface of the floating ring 2, located on one side of the counterweight bar 7. A limit sleeve 12 is fixed to the top of the guide rod 1, and the linkage rod 11 is used to pass through the limit sleeve 12 and move. A guide ring 13 is fixed to the upper surface of the limit sleeve 12, and the guide ring 13 is slidably connected to the linkage rod 11. A grip block 14 is installed at the top of the linkage rod 11, and a handle 15 is connected to the outer wall of the grip block 14. Both the handle 15 and the linkage rod 11 are fixedly connected to the grip block 14. The grip block 14 and the handle 15 are arranged perpendicularly, and the cross-sectional area of ​​the grip block 14 is larger than the cross-sectional area of ​​the linkage rod 11.

[0027] When the anti-crystallization floating mechanism of the urea tank level sensor is in use, the floating ring 2 moves upward, which drives the linkage rod 11 to move upward. The linkage rod 11 moves upward along the inner wall of the limiting sleeve 12 and simultaneously moves upward along the inner wall of the guide ring 13. The linkage rod 11 also causes the grip block 14 to move upward, which in turn causes the handle 15 to move upward. When maintenance is required, the user can hold the handle 15 and the outer wall of the grip block 14 with their hand. After moving the grip block 14 and the handle 15 upward, they can move them downward. The grip block 14 drives the linkage rod 11 to move up and down repeatedly, which in turn drives the floating ring 2 to move the two scraper rings 3 up and down repeatedly.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A urea tank level sensor anti-crystallization floating mechanism, comprising a guide rod (1), characterized in that: The outer wall of the guide rod (1) is provided with a floating cleaning assembly, the floating cleaning assembly comprising: A floating ring (2) is slidably connected to the outer wall of the guide rod (1). Both the upper and lower surfaces of the floating ring (2) are fixed with scraper rings (3). The scraper rings (3) are used to scrape the crystals along the outer wall of the guide rod (1). Multiple buoyancy blocks (4) are fixed on the outer wall of the floating ring (2), and a positioning rod (5) is fixed on the upper surface of each buoyancy block (4). The counterweight sleeve (6) is slidably inserted into the outer wall of the positioning rod (5), and multiple counterweight strips (7) are fixed between the two counterweight sleeves (6).

2. The anti-crystallization floating mechanism for a urea tank level sensor according to claim 1, characterized in that: The two scraper rings (3) are symmetrically arranged about the floating ring (2), and the outer wall of the scraper ring (3) is a smooth surface.

3. The anti-crystallization floating mechanism for a urea tank level sensor according to claim 1, characterized in that: The two buoyancy blocks (4) are symmetrically arranged about the guide rod (1), and both the buoyancy blocks (4) and the floating ring (2) are made of foam resin.

4. The anti-crystallization floating mechanism for a urea tank level sensor according to claim 1, characterized in that: Each of the buoyancy blocks (4) has a mounting block (8) fixed on one side, the mounting block (8) being used to mount a liquid level sensor.

5. The anti-crystallization floating mechanism for a urea tank level sensor according to claim 1, characterized in that: The bottom end of the guide rod (1) is fixed with a fixing block (9), and the fixing block (9) has multiple mounting holes (10) inside. Each of the mounting holes (10) has a circular cross-sectional shape.

6. The anti-crystallization floating mechanism for a urea tank level sensor according to claim 1, characterized in that: A linkage rod (11) is fixed on the upper surface of the floating ring (2) and at a position on one side of the counterweight (7). A limit sleeve (12) is fixed at the top of the guide rod (1). The linkage rod (11) is used to pass through the limit sleeve (12) and move. The upper surface of the limiting sleeve (12) is fixed with a guide ring (13), the guide ring (13) is slidably connected to the linkage rod (11), and a grip block (14) is installed at the top of the linkage rod (11). A handle (15) is connected to the outer wall of the grip block (14), and the handle (15) and the linkage rod (11) are both fixedly connected to the grip block (14).

7. The anti-crystallization floating mechanism for a urea tank level sensor according to claim 6, characterized in that: The grip block (14) is vertically positioned between the grip (15) and the handle (15), and the cross-sectional area of ​​the grip block (14) is greater than the cross-sectional area of ​​the linkage rod (11).

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