Power adjustable scr urea tube

Abstract

The utility model relates to urea pipe technical field especially power adjustable's SCR urea pipe, including protection outer tube, protection outer tube sets up for L shape, protection outer tube is provided with two groups and is left and right symmetrical distribution, regulating valve joint is provided with two groups and is respectively inserted in the vertical portion of two protection outer tubes, and in the horizontal portion of two protection outer tubes, the connecting pipe that is connected with regulating valve joint bottom end is inserted, the pipe is arranged between two protection outer tubes, and both ends of pipe extend to the horizontal portion of two protection outer tubes respectively and are connected on corresponding connecting pipe, the interface mechanism is provided with two groups, two groups of interface mechanism are respectively set in both ends of pipe and are connected with corresponding protection outer tube's horizontal end, the utility model discloses through the interface mechanism can realize the quick disassembly of pipe, the whole process does not need extra tool, and the operation step is simple, can complete the check, the replacement operation fast even in the narrow space, and the maintenance time is greatly shortened.

Description

Technical Field

[0001] This utility model relates to the field of urea tube technology, and in particular to an SCR urea tube with adjustable power. Background Technology

[0002] In diesel vehicle exhaust aftertreatment systems, SCR (Selective Catalytic Reduction) technology is one of the core technologies for reducing nitrogen oxide emissions. As a key component for transporting urea solution within this system, the performance of the urea pipe directly affects the working efficiency and stability of the SCR system. With increasingly stringent diesel vehicle emission regulations and the growing demand for precise control of urea injection volume under different operating conditions, SCR systems are gradually becoming mainstream. This places higher demands on the structural design, connection reliability, and adaptability of the matching urea pipe.

[0003] Traditional urea pipes mostly use threaded connections or simple clamping structures. Under vibration and bumpy conditions during vehicle operation, problems such as loose joints and seal failure are prone to occur. Once the urea solution leaks, it will not only lead to a decrease in the denitrification efficiency of the SCR system, but may also cause urea crystals to block the pipeline and even corrode surrounding metal parts, increasing maintenance costs and failure risks. In order to meet the urea delivery requirements under different power conditions, the SCR system needs to regularly inspect or replace the urea pipes. However, the existing structure often requires the use of special tools for disassembly, which is cumbersome and time-consuming. Especially in the confined space such as the vehicle chassis, the maintenance efficiency is extremely low, affecting the normal operation of the vehicle. Therefore, this application proposes a power-adjustable SCR urea pipe. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an SCR urea tube with adjustable power to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable-power SCR urea tube, comprising: The outer protective tube is L-shaped and consists of two sets arranged symmetrically on the left and right sides. The regulating valve connector is provided with two sets, which are respectively inserted into the vertical parts of the two protective outer tubes, and a connecting pipe connected to the bottom end of the regulating valve connector is inserted into the horizontal part of the two protective outer tubes. The conduit is positioned between two protective outer tubes, with both ends extending into the horizontal portions of the two protective outer tubes and fitting onto the corresponding connecting tubes. The connecting mechanism is provided in two sets, which are respectively sleeved on both ends of the conduit and connected to the horizontal end of the corresponding protective outer tube; The corrugated pipe is fitted over the outside of the conduit and located between two protective outer tubes.

[0006] Optionally, the outer wall of the connecting tube is provided with an anti-detachment ring, and the outer wall of the end of the conduit is provided with multiple sealing rings at equal intervals. The end of the conduit is interference-fitted to the anti-detachment ring on the outer wall of the connecting tube and the inner wall of the horizontal part of the outer tube.

[0007] Optionally, a docking groove is provided on the inner wall of the horizontal end opening of the protective outer tube. Limiting grooves are provided at the top and bottom of the inner end of the docking groove, and a locking groove is provided at the inner end of both limiting grooves. The connecting mechanism of the conduit end is inserted into the docking groove, limiting groove and locking groove of the horizontal end of the protective outer tube.

[0008] Optionally, the connecting mechanism includes a protective tube and an anti-detachment component. The protective tube is fixedly sleeved on the outside of the conduit and can be inserted into the docking groove on the inner wall of the horizontal end of the protective outer tube. Two sets of anti-detachment components are provided. The two sets of anti-detachment components are respectively installed on the top and bottom of the outer wall of the protective tube, and the anti-detachment components are respectively located in the limiting groove and engaged in the corresponding slot.

[0009] Optionally, the anti-detachment component includes a fixing block, a limiting block, and a second spring. The fixing block is installed on the outer wall of the protective tube. An opening is provided between the two ends of the fixing block. A notch is provided at the top of the opening near the end of the connecting tube. An arc-shaped notch is provided at the end of the fixing block away from the notch. The top of the notch is flush with the top of the opening. A fixing shaft located below the notch is installed inside the opening. The limiting block is L-shaped. The horizontal end of the limiting block is fitted onto the fixing shaft, and the horizontal part of the limiting block is inclined. The vertical part of the limiting block extends into the groove. The second spring is fixedly connected between the bottom of the opening and the horizontal part of the limiting block. The top of the vertical part of the limiting block and the corner away from the fixing shaft are set as a slope.

[0010] Optionally, the connecting mechanism further includes a fixed ring, a compression ring, a movable ring, and a first spring. The fixed ring is fixedly sleeved on the outside of the protective tube. A first annular groove is formed on the side of the fixed ring near the fixed block. The notch at one end of the fixed block is aligned with the first annular groove. A second annular groove is formed on the other side of the fixed ring. The top and bottom of the inner end of the first annular groove are provided with through holes communicating with the second annular groove. The compression ring is located in the first annular groove. The end of the compression ring near the fixed block is set as an arc shape, and the arc end of the compression ring can extend into the notch at one end of the fixed block. The movable ring is located in the second annular groove. Two connecting rods inserted into the through holes are connected between the movable ring and the compression ring. The first spring is sleeved on the protective tube and located in the second annular groove. The two ends of the first spring are respectively connected to the inner end of the second annular groove and the movable ring.

[0011] The beneficial effects of this utility model are: An anti-detachment ring is installed on the outer wall of the connecting pipe. The end of the conduit is interference-fitted between the anti-detachment ring and the inner wall of the horizontal part of the protective outer pipe. Together with the connecting mechanism, a double anti-detachment guarantee is formed. Even when the vehicle is driving on complex road conditions (such as bumpy roads and off-road scenarios), the connection between the conduit and the protective outer pipe and the connecting pipe is not easy to loosen, avoiding the problem of urea delivery interruption due to pipeline separation. Multiple sealing rings are equidistantly set on the outer wall of the conduit end, which fit tightly with the inner wall of the horizontal part of the protective outer pipe to form a multi-layer sealing barrier, effectively preventing urea solution leakage and avoiding corrosion of surrounding metal parts (such as chassis brackets and pipelines) by leaked urea, thus reducing the cost of component replacement.

[0012] The connecting mechanism is designed for tool-free, rapid installation and removal of the conduit: during installation, simply insert the protective tube at the end of the conduit into the mating groove of the outer protective tube; the limiting block of the anti-detachment component engages with the groove under the action of the second spring, thus securing it. During disassembly, pushing the moving ring compresses the first spring, which, through the connecting rod, drives the compression ring into the notch of the fixing block. The compression limiting block rotates around the fixed axis, disengaging it from the groove, allowing the conduit to be directly pulled out. The entire process requires no additional tools, is simple to operate, and can be quickly completed even in confined spaces, significantly reducing maintenance time, minimizing vehicle downtime losses due to maintenance, and improving operational efficiency. Attached Figure Description

[0013] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the regulating valve connector, protective outer tube, conduit, and bellows connection of this utility model. Figure 3 This is a cross-sectional structural diagram of the connection between the outer protective tube, the connecting tube, and the conduit of this utility model; Figure 4 This is a schematic cross-sectional view of the connection between the outer protective tube and the conduit of this utility model. Figure 5 This is a schematic cross-sectional view of the horizontal section of the outer tube of this utility model. Figure 6 This is a cross-sectional structural diagram of the connecting component of this utility model; Figure 7 This is a schematic diagram of the structure of the fixing block of this utility model; Figure 8 This is a schematic diagram of the structure of the fixed ring, the first spring, the compression ring, and the moving ring of this utility model; Figure 9 This is a schematic diagram of the connection between the fixing block and the extrusion ring of this utility model; In the picture: 1. Regulating valve connector; 2. Protective outer pipe; 3. Connecting pipe; 4. Conduit; 5. Bellows; 6. Connecting mechanism; 21. Docking groove; 22. Limiting groove; 23. Locking groove; 41. Sealing ring; 61. Protective tube; 62. Anti-detachment component; 63. Fixing ring; 64. Compression ring; 65. Moving ring; 66. First spring; 621. Fixing block; 622. Through opening; 623. Fixing shaft; 624. Notch; 625. Groove; 626. Limiting block; 627. Second spring; 631. First annular groove; 632. Second annular groove; 633. Through hole; 651. Connecting rod. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] Please see Figures 1-9 This utility model provides a technical solution: an adjustable SCR urea pipe, including a protective outer pipe 2, which is L-shaped and has two sets arranged symmetrically. Two sets of regulating valve connectors 1 are inserted into the vertical parts of the two protective outer pipes 2, and connecting pipes 3 connected to the bottom of the regulating valve connectors 1 are inserted into the horizontal parts of the two protective outer pipes 2. The urea solution delivery rate is flexibly adjusted through the regulating valve connectors 1, ensuring that the SCR system receives a matching urea injection quantity under different driving conditions such as idling, low speed, and high speed. This avoids the risk of crystallization caused by excessive urea under low-power conditions and solves the problem of reduced denitrification efficiency caused by insufficient urea under high-power conditions, perfectly meeting the increasingly stringent diesel vehicle emission regulations. A conduit 4 is positioned between the two protective outer pipes 2, and the guide... Both ends of the pipe 4 extend into the horizontal sections of the two protective outer pipes 2 and are sleeved on the corresponding connecting pipes 3. Two sets of connecting mechanisms 6 are provided, each sleeved on both ends of the conduit 4 and connected to the horizontal ends of the corresponding protective outer pipes 2. The corrugated pipe 5 is sleeved on the outside of the conduit 4 and located between the two protective outer pipes 2. The two sets of L-shaped and symmetrical protective outer pipes 2 provide stable support. Together with the regulating valve connector 1, connecting pipe 3, conduit 4, corrugated pipe 5 and connecting mechanism 6, a complete and highly adaptable urea delivery structure is formed. The regulating valve connector 1 can meet the precise adjustment requirements of urea delivery under different power conditions. The corrugated pipe 5 can provide external protection for the conduit 4, while the connecting mechanism 6 lays the foundation for subsequent disassembly and maintenance. The overall structure not only ensures the working efficiency and stability of the SCR system, but also adapts to the complex installation and operating environment of diesel vehicles.

[0016] like Figure 2 , Figure 3 and Figure 4 As shown, the outer wall of the connecting pipe 3 is provided with an anti-detachment ring, and the outer wall of the end of the conduit 4 is provided with multiple sealing rings 41 at equal intervals. The end of the conduit 4 is interference-fitted to the anti-detachment ring on the outer wall of the connecting pipe 3 and the inner wall of the horizontal part of the protective outer pipe 2. The interference-fit design between the anti-detachment ring on the outer wall of the connecting pipe 3 and the end of the conduit 4 effectively prevents the conduit 4 from separating from the connecting pipe 3 and the protective outer pipe 2 when the vehicle vibrates or bumps, thus preventing the interruption of urea delivery. At the same time, the multiple sealing rings 41 at equal intervals on the outer wall of the end of the conduit 4 fit tightly against the inner wall of the horizontal part of the protective outer pipe 2, forming a multi-layer sealing barrier, which can significantly reduce the risk of urea solution leakage, prevent leaked urea from corroding surrounding metal parts, and reduce maintenance costs and potential failures.

[0017] like Figure 3 , Figure 4 and Figure 5 As shown, the inner wall of the horizontal end opening of the protective outer tube 2 is provided with a docking groove 21. Limiting grooves 22 are provided at the top and bottom of the inner end of the docking groove 21, and the inner ends of the two limiting grooves 22 are provided with locking grooves 23. The connecting mechanism 6 at the end of the conduit 4 is inserted into the docking groove 21, limiting groove 22 and locking groove 23 at the horizontal end of the protective outer tube 2. The docking groove 21, limiting groove 22 and locking groove 23 provided on the inner wall of the horizontal end opening of the protective outer tube 2 are precisely matched with the connecting mechanism 6 at the end of the conduit 4, which can realize the rapid positioning of the conduit 4 and the protective outer tube 2, ensure the accurate connection position of the two, avoid sealing failure or poor transportation caused by misalignment, and provide a precise structural foundation for subsequent stable connection and efficient disassembly and assembly.

[0018] like Figure 4 and Figure 6 As shown, the connecting mechanism 6 includes a protective tube 61 and an anti-detachment component 62. The protective tube 61 is fixedly sleeved on the outside of the conduit 4 and can be inserted into the docking groove 21 on the inner wall of the horizontal end of the protective outer tube 2. Two sets of anti-detachment components 62 are provided. The two sets of anti-detachment components 62 are respectively installed on the top and bottom of the outer wall of the protective tube 61, and the anti-detachment components 62 are respectively located in the limiting groove 22 and locked in the corresponding locking groove 23. The protective tube 61 in the connecting mechanism 6 can form protection for the end of the conduit 4 and is adapted to the docking groove 21 on the horizontal end of the protective outer tube 2. The two sets of anti-detachment components 62 are respectively installed on the top and bottom of the protective tube 61 and can be locked in the locking groove 23 of the protective outer tube 2. The mechanical locking structure further strengthens the connection stability between the conduit 4 and the protective outer tube 2. Even under long-term complex operating conditions of the vehicle, it can effectively prevent the conduit 4 from loosening and ensure the overall connection reliability of the urea tube.

[0019] like Figure 6 and Figure 7As shown, the anti-detachment component 62 includes a fixing block 621, a limiting block 626, and a second spring 627. The fixing block 621 is installed on the outer wall of the protective tube 61. An opening 622 is provided between the two ends of the fixing block 621. A notch 624 is provided at the top of the opening 622 near the connecting tube 3. An arc-shaped groove 625 is provided at the end of the fixing block 621 away from the notch 624. The top of the groove 625 is flush with the top of the opening 622. A fixing shaft 623 located below the groove 625 is installed inside the opening 622. The limiting block 626 is L-shaped. The horizontal end of the limiting block 626 is sleeved on the fixing shaft 623, and the horizontal part of the limiting block 626 is inclined. The vertical part of the limiting block 626 extends into the groove 23. The second spring 627 is fixedly connected to... Between the bottom of the opening 622 and the horizontal part of the limiting block 626, the top of the vertical part of the limiting block 626 and the corner away from the fixed shaft 623 are set as a slope. The L-shaped limiting block 626 in the anti-detachment assembly 62 is installed in the opening 622 on the fixed block 621 through the fixed shaft 623. The horizontal part of the limiting block 626 is inclined and cooperates with the second spring 627 to give the limiting block 626 elastic reset capability. The sloped design at the top of the vertical part makes it easy to slide into the slot 23 during installation. At the same time, the opening 622, notch 624 and groove 625 on the fixed block 621 provide reasonable space for the movement of the limiting block 626, which not only ensures the stability of the limiting block 626 when it is engaged, but also creates conditions for the force rotation during subsequent disassembly, thus improving the operational flexibility of the connecting mechanism 6.

[0020] like Figure 6 , Figure 8 and Figure 9As shown, the connecting mechanism 6 also includes a fixed ring 63, a compression ring 64, a movable ring 65, and a first spring 66. The fixed ring 63 is fixedly sleeved on the outside of the protective tube 61. A first annular groove 631 is formed on the side of the fixed ring 63 near the fixed block 621. The notch 625 at one end of the fixed block 621 is aligned with the first annular groove 631. A second annular groove 632 is formed on the other side of the fixed ring 63. Through holes 633 communicating with the second annular groove 632 are formed at the top and bottom of the inner end of the first annular groove 631. The compression ring 64 is located in the first annular groove 631. The end of the compression ring 64 near the fixed block 621 is set as an arc shape, and the arc end of the compression ring 64 can extend into the notch 625 at one end of the fixed block 621. The movable ring 65 is located in the second annular groove 632. Two connecting rods 6, which are inserted into the through holes 633, are connected between the movable ring 65 and the compression ring 64. 51. The first spring 66 is sleeved on the protective tube 61 and located in the second annular groove 632. The two ends of the first spring 66 are respectively connected to the inner end of the second annular groove 632 and the moving ring 65. The fixed ring 63, the compression ring 64, the moving ring 65 in the connecting mechanism 6 form a linkage structure with the first spring 66. Pushing the moving ring 65 can drive the compression ring 64 to extend into the notch 625 at one end of the fixed block 621 through the connecting rod 651. The compression ring 64 squeezes the inclined horizontal part of the limiting block 626, so that the top of the vertical part of the limiting block 626 is disengaged from the slot 23, realizing the quick disassembly of the guide tube 4. After the moving ring 65 is released, the first spring 66 resets and drives each component back to the initial position, which is convenient for the next installation. The entire disassembly and assembly process does not require additional tools and the operation steps are simple. It is especially suitable for inspection and replacement work in narrow spaces such as vehicle chassis, which greatly shortens the maintenance time.

[0021] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power-adjustable SCR urea tube, characterized in that, include: The outer protective tube (2) is L-shaped and has two sets that are symmetrically distributed on the left and right sides. The regulating valve connector (1) is provided with two sets which are respectively inserted into the vertical part of the two protective outer tubes (2), and a connecting pipe (3) connected to the bottom end of the regulating valve connector (1) is inserted into the horizontal part of the two protective outer tubes (2). The conduit (4) is set between the two protective outer tubes (2), and both ends of the conduit (4) extend into the horizontal part of the two protective outer tubes (2) and are sleeved on the corresponding connecting tubes (3); The connecting mechanism (6) is provided in two sets. The two sets of connecting mechanisms (6) are respectively sleeved on both ends of the conduit (4) and connected to the horizontal end of the corresponding protective outer tube (2); The corrugated pipe (5) is fitted outside the conduit (4) and located between the two protective outer pipes (2).

2. The power-adjustable SCR urea tube according to claim 1, characterized in that, The outer wall of the connecting pipe (3) is provided with an anti-detachment ring, and the outer wall of the end of the conduit (4) is provided with multiple sealing rings (41) at equal intervals. The end of the conduit (4) is interference-fitted to the anti-detachment ring on the outer wall of the connecting pipe (3) and the inner wall of the horizontal part of the outer pipe (2).

3. The power-adjustable SCR urea tube according to claim 1, characterized in that, The inner wall of the horizontal end opening of the protective outer tube (2) is provided with a docking groove (21). A limiting groove (22) is provided at the top and bottom of the inner end of the docking groove (21), and a locking groove (23) is provided at the inner end of the two limiting grooves (22). The connecting mechanism (6) at the end of the conduit (4) is inserted into the docking groove (21), limiting groove (22) and locking groove (23) at the horizontal end of the protective outer tube (2).

4. The power-adjustable SCR urea tube according to claim 3, characterized in that, The connecting mechanism (6) includes a protective tube (61) and an anti-detachment component (62). The protective tube (61) is fixedly sleeved on the outside of the guide tube (4), and the protective tube (61) can be inserted into the docking groove (21) on the inner wall of the horizontal end of the protective outer tube (2). There are two sets of anti-detachment components (62). The two sets of anti-detachment components (62) are respectively installed on the top and bottom of the outer wall of the protective tube (61), and the anti-detachment components (62) are respectively located in the limiting groove (22) and engaged in the corresponding slot (23).

5. The power-adjustable SCR urea tube according to claim 4, characterized in that, The anti-detachment component (62) includes a fixing block (621), a limiting block (626), and a second spring (627). The fixing block (621) is installed on the outer wall of the protective tube (61). A through-hole (622) is provided between the two ends of the fixing block (621). A notch (624) is provided at the top of the through-hole (622) near the end of the connecting tube (3). An arc-shaped notch (625) is provided at the end of the fixing block (621) away from the notch (624). The top of the notch (625) is flush with the top of the through-hole (622). The interior of the through-hole (622) A fixed shaft (623) is installed below the notch (625). The limiting block (626) is L-shaped. The horizontal end of the limiting block (626) is sleeved on the fixed shaft (623), and the horizontal part of the limiting block (626) is inclined. The vertical part of the limiting block (626) extends into the slot (23). The second spring (627) is fixedly connected between the bottom of the opening (622) and the horizontal part of the limiting block (626). The top of the vertical part of the limiting block (626) and the corner away from the fixed shaft (623) are set as inclined surfaces.

6. The power-adjustable SCR urea tube according to claim 5, characterized in that, The connecting mechanism (6) further includes a fixing ring (63), a compression ring (64), a moving ring (65), and a first spring (66). The fixing ring (63) is fixedly sleeved on the outside of the protective tube (61). A first annular groove (631) is provided on the side of the fixing ring (63) near the fixing block (621). The notch (625) at one end of the fixing block (621) is aligned with the first annular groove (631). A second annular groove (632) is provided on the other side of the fixing ring (63). The top and bottom of the inner end of the first annular groove (631) are provided with through holes (633) communicating with the second annular groove (632). The compression ring (64) The extrusion ring (64) is located in the first annular groove (631). The end of the extrusion ring (64) near the fixed block (621) is set in an arc shape, and the arc end of the extrusion ring (64) can extend into the notch (625) at one end of the fixed block (621). The moving ring (65) is located in the second annular groove (632). Two connecting rods (651) inserted into the through hole (633) are connected between the moving ring (65) and the extrusion ring (64). The first spring (66) is sleeved on the protective tube (61) and located in the second annular groove (632). The two ends of the first spring (66) are respectively connected to the inner end of the second annular groove (632) and the moving ring (65).

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