A reinforced anti-deformation EGR gas outlet pipe assembly
By introducing a spiral guide plate and reinforcing rib structure into the EGR outlet pipe assembly, combined with clamping components and rubber buffer pads, the deformation problem of the EGR outlet pipe under high temperature, high pressure and vibration is solved, achieving stable exhaust gas transmission and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG GUOSHENG NEW MATERIAL TECHNOLOGY CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-06-05
Smart Images
Figure CN224326342U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of EGR exhaust pipe technology, and in particular to a deformation-resistant EGR exhaust pipe assembly with reinforcing ribs. Background Technology
[0002] With the rapid development of the global automotive industry, the pollution caused by vehicle exhaust emissions is becoming increasingly serious. To effectively control nitrogen oxide (NOx) emissions, exhaust gas recirculation (EGR) systems have become a key component of modern automotive engine emission control technology. EGR systems reintroduce a portion of the exhaust gases from the engine into the intake manifold, where they mix with fresh air before entering the cylinders for combustion. This effectively reduces combustion temperature and oxygen concentration, thereby reducing NOx formation and helping vehicles meet stringent environmental emission standards.
[0003] However, traditional EGR exhaust pipe assemblies still have the following shortcomings in practical applications: When the engine is running, the exhaust gas temperature is usually high and the pressure is high. When this gas acts on the pipe for a long time, the pipe material will be subjected to huge thermal and mechanical stress, leading to material fatigue, deformation, and even cracking, which in turn causes exhaust gas leakage and seriously affects the emission control effect. In addition, during the vehicle's operation, the continuous vibration of the engine and the alternating load generated by road bumps will constantly impact the EGR exhaust pipe assembly, making it very easy to crack or break. Therefore, we have introduced a deformation-resistant EGR exhaust pipe assembly with reinforcing ribs. Utility Model Content
[0004] The main objective of this invention is to provide a deformation-resistant EGR exhaust pipe assembly with reinforcing ribs, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A deformation-resistant EGR outlet pipe assembly with reinforcing ribs includes an input flange, an deformation-resistant component fitted inside the input flange, an output flange fitted to the right side of the deformation-resistant component, several through-holes at the right edge of both the input and output flanges, a clamping component fitted in the middle of the deformation-resistant component, bolts threaded to the upper and lower front ends of the clamping component, and nuts threaded to the rear outer surfaces of both bolts.
[0007] Preferably, the anti-deformation component includes an inner outlet pipe and an outer outlet pipe. A spiral guide plate is fixedly sleeved inside the inner outlet pipe, and the outer surface of the spiral guide plate is in close contact with the inner wall of the inner outlet pipe. A plurality of main reinforcing ribs are fixedly connected to the outer surface of the inner outlet pipe, and two auxiliary reinforcing ribs are fixedly connected to the outer surface of each of the main reinforcing ribs. A plurality of main slots are formed on the inner wall of the outer outlet pipe, and two auxiliary slots are formed on the inner wall of each of the main slots. The left and right parts of the outer outlet pipe are respectively sleeved in the input flange and the output flange.
[0008] By adopting the above technical solution: the spiral guide plate in the anti-deformation component guides the exhaust gas to flow along the spiral path, increases the contact between the exhaust gas and the inner wall of the outlet pipe, enhances heat exchange, reduces the exhaust gas temperature, and at the same time optimizes the flow path, reduces turbulence, and reduces flow resistance.
[0009] Preferably, the inner tube of the vent pipe is located inside the outer tube of the vent pipe, and several main reinforcing ribs are respectively snapped into several corresponding main slots, and several auxiliary reinforcing ribs are respectively snapped into several corresponding auxiliary slots.
[0010] By adopting the above technical solution: the main reinforcing rib on the outer surface of the inner tube of the exhaust pipe is engaged with the main groove on the inner wall of the outer tube of the exhaust pipe, and the auxiliary reinforcing rib is tightly engaged with the auxiliary groove, so that when the pipe is subjected to multi-directional loads such as engine vibration and road impact, the stress can be evenly distributed to the entire structure through the mechanical interlocking between the rib grooves, thereby improving the deformation resistance.
[0011] Preferably, several of the main reinforcing ribs are arranged in a circular array around the center of the vent pipe inner tube.
[0012] By adopting the above technical solution, several main reinforcing ribs are arranged in a ring array around the center of the exhaust pipe, so that when the pipe is subjected to external forces from engine vibration and road bumps, the external forces can be evenly distributed to each main reinforcing rib.
[0013] Preferably, the clamping assembly includes a first clamp and a second clamp, with two connecting plates fixedly connected to the outer surfaces of the first clamp and the second clamp, and each of the four connecting plates having a through screw hole at its front end. Several rubber buffer pads are fixedly connected to the inner wall surfaces of the first clamp and the second clamp.
[0014] By adopting the above technical solution, a rubber buffer pad fixedly connected to the inner wall of the first and second clamps provides flexible protection for the outer pipe of the exhaust pipe. When the first and second clamps are tightened, the rubber buffer pad uses its own elastic deformation to buffer the pressure of the first and second clamps on the pipe, avoiding wear and scratches caused by direct contact with the pipe. During vehicle operation, engine vibration and road bumps will cause the pipe to shift and shake. The rubber buffer pad can absorb vibration energy, reduce the vibration amplitude of the pipe, extend the service life of the pipe, and reduce the noise caused by vibration.
[0015] Preferably, both the first clamp and the second clamp are semi-circular, and the first clamp and the second clamp are distributed in a front-to-back mirror image, and both the first clamp and the second clamp are sleeved on the outer tube of the air outlet pipe.
[0016] By adopting the above technical solution: both the first clamp and the second clamp are semi-circular, and after combination, they can fit tightly with the cylindrical surface of the outer tube of the air outlet pipe to form a complete annular wrapping structure.
[0017] Preferably, the rubber buffer pads are distributed in pairs at equal distances, and all the rubber buffer pads are in close contact with the outer surface of the vent pipe.
[0018] By adopting the above technical solution, several rubber buffer pads are distributed at equal intervals in pairs to ensure that the pressure on the outer surface of the outlet pipe is evenly distributed when the first clamp and the second clamp are tightened.
[0019] Preferably, the outer surfaces of the two bolts are threaded to the inner walls of the corresponding two screw holes.
[0020] By adopting the above technical solution: when the bolt is tightened, the tension causes the first clamp and the second clamp to tighten towards the middle, firmly clamping the outer tube of the vent pipe.
[0021] Compared with the prior art, the present invention has the following beneficial effects:
[0022] 1. In this utility model, the assembly is securely connected between the engine exhaust system and the exhaust gas recirculation system by the input flange and the output flange, and further fixed by the clamping assembly. In use, the high temperature and high pressure exhaust gas generated by the engine enters the anti-deformation assembly through the input flange. The spiral guide plate in the inner tube of the exhaust pipe guides the exhaust gas to flow along the spiral path, which increases the contact area and contact time between the exhaust gas and the inner tube wall of the exhaust pipe. This allows the exhaust gas to fully exchange heat with the inner tube wall of the exhaust pipe during the flow process, effectively reducing the temperature. At the same time, the spiral path optimizes the flow trajectory of the exhaust gas, reduces turbulence, and reduces flow resistance, allowing the exhaust gas to pass smoothly through the pipe and enter the exhaust gas recirculation system through the output flange, thus efficiently completing the exhaust gas transmission work.
[0023] 2. In this utility model, the main reinforcing ribs and auxiliary reinforcing ribs arranged in a ring array on the outer surface of the inner tube of the exhaust pipe are interlocked with the main and auxiliary slots on the inner wall of the outer tube of the exhaust pipe to form a stable three-dimensional support structure. With the high rigidity of the main and auxiliary reinforcing ribs, the external force is evenly distributed, effectively limiting the deformation of the inner and outer tubes of the exhaust pipe, maintaining the integrity of the pipe structure, and preventing exhaust gas leakage caused by deformation. At the same time, since the first and second clamps are tightened by bolts and nuts, the rubber buffer pad on the inner wall is tightly fitted with the outer tube of the exhaust pipe. The high friction characteristics of the rubber material increase the friction force and prevent the exhaust pipe assembly from sliding or shifting within the first and second clamps. The rubber buffer pad can also absorb vibration and impact energy, ensuring that the entire EGR exhaust pipe assembly works stably under complex working conditions, greatly improving the reliability and service life of the system. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of an EGR exhaust pipe assembly with reinforcing ribs to resist deformation according to this utility model.
[0025] Figure 2 This is a structural schematic diagram of an anti-deformation component of an anti-deformation EGR outlet pipe assembly with reinforcing ribs according to the present invention.
[0026] Figure 3 This is a schematic diagram of the combined connection structure of the inner tube of the exhaust pipe and the spiral guide plate of a deformation-resistant EGR exhaust pipe assembly with reinforcing ribs according to this utility model (the inner tube of the exhaust pipe is cut out).
[0027] Figure 4 This is an exploded view of the anti-deformation component of an anti-deformation EGR outlet pipe assembly with reinforcing ribs according to the present invention.
[0028] Figure 5 This utility model relates to a deformation-resistant EGR exhaust pipe assembly with reinforcing ribs. Figure 4 Enlarged view of the structure at point A in the image;
[0029] Figure 6 This utility model relates to a deformation-resistant EGR exhaust pipe assembly with reinforcing ribs. Figure 4 Enlarged view of the structure at point B in the image;
[0030] Figure 7 This is a schematic diagram of the structure of a clamping assembly for a deformation-resistant EGR exhaust pipe assembly with reinforcing ribs according to this utility model.
[0031] Figure 8 This is an exploded view of the structure of a clamping assembly for a deformation-resistant EGR exhaust pipe assembly with reinforcing ribs according to this utility model.
[0032] In the diagram: 1. Input flange; 2. Anti-deformation component; 3. Output flange; 4. Fixing hole; 5. Clamping component; 6. Bolt; 7. Nut; 21. Inner tube of exhaust pipe; 22. Outer tube of exhaust pipe; 23. Spiral guide plate; 24. Main reinforcing rib; 25. Auxiliary reinforcing rib; 26. Main slot; 27. Auxiliary slot; 51. First clamp; 52. Second clamp; 53. Connecting plate; 54. Screw hole; 55. Rubber buffer pad. Detailed Implementation
[0033] 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.
[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0036] Please see Figure 1-8 This utility model provides a technical solution:
[0037] A deformation-resistant EGR outlet pipe assembly with reinforcing ribs includes an input flange 1, an anti-deformation component 2 fitted inside the input flange 1, an output flange 3 fitted to the right side of the anti-deformation component 2, several through fixing holes 4 at the right edge of both the input flange 1 and the output flange 3, a clamping component 5 fitted in the middle of the anti-deformation component 2, bolts 6 threadedly connected to the upper and lower front ends of the clamping component 5, and nuts 7 threadedly connected to the rear outer surfaces of the two bolts 6.
[0038] In this embodiment, the anti-deformation component 2 includes an inner outlet pipe 21 and an outer outlet pipe 22. A spiral guide plate 23 is fixedly sleeved inside the inner outlet pipe 21, and the outer surface of the spiral guide plate 23 is in close contact with the inner wall of the inner outlet pipe 21. Several main reinforcing ribs 24 are fixedly connected to the outer surface of the inner outlet pipe 21, and two auxiliary reinforcing ribs 25 are fixedly connected to the outer surface of each main reinforcing rib 24. Several main slots 26 are opened on the inner wall of the outer outlet pipe 22, and two auxiliary slots 27 are opened on the inner wall of each main slot 26. The left and right parts of the outer outlet pipe 22 are respectively sleeved in the input flange 1 and the output flange 3. The inner outlet pipe 21 is located inside the outer outlet pipe 22, and the several main reinforcing ribs 24 are respectively engaged in the corresponding several main slots 26, and the several auxiliary reinforcing ribs 25 are respectively engaged in the corresponding several auxiliary slots 27. Several main reinforcing ribs 24 are arranged in a ring array around the center of the inner tube 21 of the vent pipe; the clamping assembly 5 includes a first clamp 51 and a second clamp 52, and two connecting plates 53 are fixedly connected to the outer surfaces of the first clamp 51 and the second clamp 52. The front ends of the four connecting plates 53 are all provided with through screw holes 54. Several rubber buffer pads 55 are fixedly connected to the inner walls of the first clamp 51 and the second clamp 52; the first clamp 51 and the second clamp 52 are both set as semicircles, and the first clamp 51 and the second clamp 52 are arranged in a mirror image arrangement. The first clamp 51 and the second clamp 52 are both sleeved on the outer tube 22 of the vent pipe; the several rubber buffer pads 55 are distributed at equal intervals in pairs, and the several rubber buffer pads 55 are tightly fitted to the outer surface of the outer tube 22 of the vent pipe; the outer surfaces of the two bolts 6 are respectively threaded to the inner walls of the corresponding two screw holes 54.
[0039] It should be noted that this utility model is a reinforced, deformation-resistant EGR exhaust pipe assembly. During installation, the elastic properties of the gaskets are first utilized by installing them on the contact surfaces of the inlet flange 1 and the engine exhaust system, and on the connection surfaces of the outlet flange 3 and the exhaust gas recirculation system. When compressed, the gaskets undergo compression deformation, and their rebound force creates sealing pressure on the contact surfaces, effectively filling tiny gaps and preventing exhaust gas leakage from the connection points. Next, fasteners are passed sequentially through the fixing holes 4 on the edges of the inlet flange 1 and the outlet flange 3 to securely connect the flanges to the corresponding systems, ensuring the EGR exhaust pipe assembly is firmly installed between the engine exhaust system and the exhaust gas recirculation system. Finally, the semi-circular, mirror-shaped... The first clamp 51 and the second clamp 52, distributed as shown, are fitted onto the outer tube 22 of the exhaust pipe. The bolt 6 is rotated through the screw hole 54 on the connecting plate 53 and the nut 7 is tightened, causing the first clamp 51 and the second clamp 52 to tighten. At this time, the rubber buffer pads 55, evenly distributed on the inner walls of the first clamp 51 and the second clamp 52, fit tightly against the outer tube 22 of the exhaust pipe, completing the fixed installation of the assembly. When the engine starts running, the high-temperature, high-pressure exhaust gas generated flows into the inner tube 21 of the exhaust pipe through the input flange 1. The spiral guide plate 23, tightly fitted to the inner wall of the inner tube 21, guides the exhaust gas along a spiral path, increasing the contact area and contact time between the exhaust gas and the inner tube 21 wall, allowing the exhaust gas to interact with the inner tube 21 wall during its flow. 1. The pipe wall undergoes thorough heat exchange, effectively reducing its own temperature. Simultaneously, the spiral path optimizes the exhaust gas flow trajectory, reducing turbulence and flow resistance, allowing the exhaust gas to pass through the pipe more smoothly. After being processed by the inner exhaust pipe 21, the exhaust gas enters the outer exhaust pipe 22 and finally flows into the exhaust gas recirculation system via the output flange 3, completing the exhaust gas transmission stage. During vehicle operation, the continuous vibration of the engine and the external forces generated by road bumps continuously act on the EGR exhaust pipe assembly. At this time, the main reinforcing ribs 24 and auxiliary reinforcing ribs 25 distributed in a ring array on the outer surface of the inner exhaust pipe 21 in the anti-deformation component 2, and the main slots 26 and auxiliary slots 27 on the inner wall of the outer exhaust pipe 22 cooperate to form... The robust three-dimensional support structure, with the main reinforcing rib 24 engaging with the main slot 26 and the auxiliary reinforcing rib 25 engaging with the auxiliary slot 27, utilizes its high rigidity to evenly distribute external forces, effectively limiting the deformation of the inner and outer pipes of the exhaust pipe 21 and maintaining the integrity of the pipeline structure. This prevents exhaust gas leakage due to deformation. Simultaneously, in the tightened state, the rubber buffer pads 55 on the inner walls of the first and second clamps 51 and 52 are tightly fitted to the outer pipe 22. Utilizing the high frictional properties of rubber, this increases friction and prevents the exhaust pipe assembly from sliding or shifting within the clamps. The rubber buffer pads 55 also absorb vibration and impact energy, reducing the relative displacement between the outer pipe 22 and the first and second clamps 51 and 52.Ensure the entire EGR outlet manifold assembly operates stably under complex conditions.
[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A deformation-resistant EGR outlet pipe assembly with reinforcing ribs, comprising an inlet flange (1), characterized in that: An anti-deformation component (2) is fitted inside the input flange (1). An output flange (3) is fitted on the right side of the anti-deformation component (2). Several through-holes (4) are opened at the right edge of the input flange (1) and the right edge of the output flange (3). A clamping component (5) is fitted in the middle of the anti-deformation component (2). Bolts (6) are threaded to the upper and lower front ends of the clamping component (5). Nuts (7) are threaded to the rear of the outer surfaces of the two bolts (6). The anti-deformation component (2) includes an inner tube (21) of the exhaust pipe and an outer tube (22) of the exhaust pipe. A spiral guide plate (23) is fixedly sleeved inside the inner tube (21), and the outer surface of the spiral guide plate (23) is in close contact with the inner wall of the inner tube (21). Several main reinforcing ribs (24) are fixedly connected to the outer surface of the inner tube (21), and two auxiliary reinforcing ribs (25) are fixedly connected to the outer surface of each of the main reinforcing ribs (24). Several main slots (26) are opened on the inner wall of the outer tube (22), and two auxiliary slots (27) are opened on the inner wall of each of the main slots (26). The left and right parts of the outer tube (22) are respectively sleeved in the input flange (1) and the output flange (3).
2. The deformation-resistant EGR exhaust pipe assembly with reinforcing ribs according to claim 1, characterized in that: The inner tube (21) of the air outlet pipe is located inside the outer tube (22) of the air outlet pipe. Several main reinforcing ribs (24) are respectively snapped into several main slots (26), and several auxiliary reinforcing ribs (25) are respectively snapped into several auxiliary slots (27).
3. The deformation-resistant EGR exhaust pipe assembly with reinforcing ribs according to claim 1, characterized in that: Several of the main reinforcing ribs (24) are arranged in a ring array around the center of the vent pipe inner tube (21).
4. The deformation-resistant EGR exhaust pipe assembly with reinforcing ribs according to claim 1, characterized in that: The clamping assembly (5) includes a first clamp (51) and a second clamp (52). Two connecting plates (53) are fixedly connected to the outer surfaces of the first clamp (51) and the second clamp (52). The front ends of the four connecting plates (53) are all provided with through screw holes (54). Several rubber buffer pads (55) are fixedly connected to the inner wall surfaces of the first clamp (51) and the second clamp (52).
5. The deformation-resistant EGR exhaust pipe assembly with reinforcing ribs according to claim 4, characterized in that: The first clamp (51) and the second clamp (52) are both set as semi-circles, and the first clamp (51) and the second clamp (52) are distributed in a front-to-back mirror image. The first clamp (51) and the second clamp (52) are both sleeved on the outer pipe (22) of the air outlet pipe.
6. The deformation-resistant EGR exhaust pipe assembly with reinforcing ribs according to claim 4, characterized in that: Several rubber buffer pads (55) are distributed in pairs at equal distances, and several rubber buffer pads (55) are in close contact with the outer surface of the vent pipe (22).
7. The deformation-resistant EGR exhaust pipe assembly with reinforcing ribs according to claim 1, characterized in that: The outer surfaces of the two bolts (6) are threaded to the inner walls of the corresponding two screw holes (54).